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Signed-off-by: Jess Frazelle <acidburn@microsoft.com>
This commit is contained in:
Jess Frazelle 2018-03-19 21:36:34 -04:00
parent 7a437ada25
commit 639756e8c6
4300 changed files with 824810 additions and 9292 deletions
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206
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# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
[[projects]]
name = "github.com/Microsoft/go-winio"
packages = ["."]
revision = "7da180ee92d8bd8bb8c37fc560e673e6557c392f"
version = "v0.4.7"
[[projects]]
branch = "master"
name = "github.com/containerd/console"
packages = ["."]
revision = "cb7008ab3d8359b78c5f464cb7cf160107ad5925"
[[projects]]
branch = "master"
name = "github.com/containerd/continuity"
packages = ["pathdriver"]
revision = "d8fb8589b0e8e85b8c8bbaa8840226d0dfeb7371"
[[projects]]
branch = "master"
name = "github.com/coreos/go-systemd"
packages = [
"activation",
"dbus",
"util"
]
revision = "54f92f7696b56003327688a2f18514c6c43e98c7"
[[projects]]
name = "github.com/coreos/pkg"
packages = ["dlopen"]
revision = "3ac0863d7acf3bc44daf49afef8919af12f704ef"
version = "v3"
[[projects]]
name = "github.com/cyphar/filepath-securejoin"
packages = ["."]
revision = "06bda8370f45268db985f7af15732444d94ed51c"
version = "v0.2.1"
[[projects]]
branch = "master"
name = "github.com/docker/docker"
packages = [
"pkg/aaparser",
"pkg/archive",
"pkg/fileutils",
"pkg/idtools",
"pkg/ioutils",
"pkg/longpath",
"pkg/mount",
"pkg/pools",
"pkg/system",
"profiles/apparmor"
]
revision = "0c1006f1abc1af7aa6b9847754370d054dfa6c68"
source = "github.com/moby/moby"
[[projects]]
name = "github.com/docker/go-units"
packages = ["."]
revision = "0dadbb0345b35ec7ef35e228dabb8de89a65bf52"
version = "v0.3.2"
[[projects]]
name = "github.com/godbus/dbus"
packages = ["."]
revision = "a389bdde4dd695d414e47b755e95e72b7826432c"
version = "v4.1.0"
[[projects]]
name = "github.com/golang/protobuf"
packages = ["proto"]
revision = "925541529c1fa6821df4e44ce2723319eb2be768"
version = "v1.0.0"
[[projects]]
branch = "master"
name = "github.com/mrunalp/fileutils"
packages = ["."]
revision = "7d4729fb36185a7c1719923406c9d40e54fb93c7"
[[projects]]
name = "github.com/opencontainers/go-digest"
packages = ["."]
revision = "279bed98673dd5bef374d3b6e4b09e2af76183bf"
version = "v1.0.0-rc1"
[[projects]]
name = "github.com/opencontainers/image-spec"
packages = [
"specs-go",
"specs-go/v1"
]
revision = "d60099175f88c47cd379c4738d158884749ed235"
version = "v1.0.1"
[[projects]]
branch = "master"
name = "github.com/opencontainers/runc"
packages = [
"libcontainer",
"libcontainer/apparmor",
"libcontainer/cgroups",
"libcontainer/cgroups/fs",
"libcontainer/cgroups/systemd",
"libcontainer/configs",
"libcontainer/configs/validate",
"libcontainer/criurpc",
"libcontainer/intelrdt",
"libcontainer/keys",
"libcontainer/mount",
"libcontainer/nsenter",
"libcontainer/seccomp",
"libcontainer/specconv",
"libcontainer/stacktrace",
"libcontainer/system",
"libcontainer/user",
"libcontainer/utils"
]
revision = "69663f0bd4b60df09991c08812a60108003fa340"
[[projects]]
name = "github.com/opencontainers/runtime-spec"
packages = ["specs-go"]
revision = "4e3b9264a330d094b0386c3703c5f379119711e8"
version = "v1.0.1"
[[projects]]
name = "github.com/opencontainers/selinux"
packages = [
"go-selinux",
"go-selinux/label"
]
revision = "ba1aefe8057f1d0cfb8e88d0ec1dc85925ef987d"
version = "v1.0.0-rc1"
[[projects]]
name = "github.com/pkg/errors"
packages = ["."]
revision = "645ef00459ed84a119197bfb8d8205042c6df63d"
version = "v0.8.0"
[[projects]]
branch = "master"
name = "github.com/seccomp/libseccomp-golang"
packages = ["."]
revision = "f6ec81daf48e41bf48b475afc7fe06a26bfb72d1"
[[projects]]
name = "github.com/sirupsen/logrus"
packages = ["."]
revision = "c155da19408a8799da419ed3eeb0cb5db0ad5dbc"
version = "v1.0.5"
[[projects]]
branch = "master"
name = "github.com/syndtr/gocapability"
packages = ["capability"]
revision = "33e07d32887e1e06b7c025f27ce52f62c7990bc0"
[[projects]]
name = "github.com/vishvananda/netlink"
packages = [
".",
"nl"
]
revision = "a2ad57a690f3caf3015351d2d6e1c0b95c349752"
version = "v1.0.0"
[[projects]]
branch = "master"
name = "github.com/vishvananda/netns"
packages = ["."]
revision = "be1fbeda19366dea804f00efff2dd73a1642fdcc"
[[projects]]
branch = "master"
name = "golang.org/x/crypto"
packages = ["ssh/terminal"]
revision = "c3a3ad6d03f7a915c0f7e194b7152974bb73d287"
[[projects]]
branch = "master"
name = "golang.org/x/net"
packages = ["context"]
revision = "6078986fec03a1dcc236c34816c71b0e05018fda"
[[projects]]
branch = "master"
name = "golang.org/x/sys"
packages = [
"unix",
"windows"
]
revision = "d8e400bc7db4870d786864138af681469693d18c"
[solve-meta]
analyzer-name = "dep"
analyzer-version = 1
inputs-digest = "98adca7c9d30cc495c40327558bb9083199eb77eefb7b99aff37bbdf2abd4992"
solver-name = "gps-cdcl"
solver-version = 1

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# Gopkg.toml example
#
# Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md
# for detailed Gopkg.toml documentation.
#
# required = ["github.com/user/thing/cmd/thing"]
# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
#
# [[constraint]]
# name = "github.com/user/project"
# version = "1.0.0"
#
# [[constraint]]
# name = "github.com/user/project2"
# branch = "dev"
# source = "github.com/myfork/project2"
#
# [[override]]
# name = "github.com/x/y"
# version = "2.4.0"
[[override]]
name = "github.com/Sirupsen/logrus"
source = "github.com/sirupsen/logrus"
[[override]]
name = "github.com/docker/docker"
source = "github.com/moby/moby"
branch = "master"
[[constraint]]
name = "github.com/opencontainers/runc"
branch = "master"
[[constraint]]
name = "github.com/opencontainers/runtime-spec"
version = "v1.0.1"
[[constraint]]
name = "github.com/containerd/console"
branch = "master"
[[constraint]]
name = "github.com/coreos/go-systemd"
branch = "master"
[[constraint]]
name = "github.com/seccomp/libseccomp-golang"
branch = "master"

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*.exe

22
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The MIT License (MIT)
Copyright (c) 2015 Microsoft
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# go-winio
This repository contains utilities for efficiently performing Win32 IO operations in
Go. Currently, this is focused on accessing named pipes and other file handles, and
for using named pipes as a net transport.
This code relies on IO completion ports to avoid blocking IO on system threads, allowing Go
to reuse the thread to schedule another goroutine. This limits support to Windows Vista and
newer operating systems. This is similar to the implementation of network sockets in Go's net
package.
Please see the LICENSE file for licensing information.
This project has adopted the [Microsoft Open Source Code of
Conduct](https://opensource.microsoft.com/codeofconduct/). For more information
see the [Code of Conduct
FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact
[opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional
questions or comments.
Thanks to natefinch for the inspiration for this library. See https://github.com/natefinch/npipe
for another named pipe implementation.

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Copyright (c) 2012 The Go Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package tar implements access to tar archives.
// It aims to cover most of the variations, including those produced
// by GNU and BSD tars.
//
// References:
// http://www.freebsd.org/cgi/man.cgi?query=tar&sektion=5
// http://www.gnu.org/software/tar/manual/html_node/Standard.html
// http://pubs.opengroup.org/onlinepubs/9699919799/utilities/pax.html
package tar
import (
"bytes"
"errors"
"fmt"
"os"
"path"
"time"
)
const (
blockSize = 512
// Types
TypeReg = '0' // regular file
TypeRegA = '\x00' // regular file
TypeLink = '1' // hard link
TypeSymlink = '2' // symbolic link
TypeChar = '3' // character device node
TypeBlock = '4' // block device node
TypeDir = '5' // directory
TypeFifo = '6' // fifo node
TypeCont = '7' // reserved
TypeXHeader = 'x' // extended header
TypeXGlobalHeader = 'g' // global extended header
TypeGNULongName = 'L' // Next file has a long name
TypeGNULongLink = 'K' // Next file symlinks to a file w/ a long name
TypeGNUSparse = 'S' // sparse file
)
// A Header represents a single header in a tar archive.
// Some fields may not be populated.
type Header struct {
Name string // name of header file entry
Mode int64 // permission and mode bits
Uid int // user id of owner
Gid int // group id of owner
Size int64 // length in bytes
ModTime time.Time // modified time
Typeflag byte // type of header entry
Linkname string // target name of link
Uname string // user name of owner
Gname string // group name of owner
Devmajor int64 // major number of character or block device
Devminor int64 // minor number of character or block device
AccessTime time.Time // access time
ChangeTime time.Time // status change time
CreationTime time.Time // creation time
Xattrs map[string]string
Winheaders map[string]string
}
// File name constants from the tar spec.
const (
fileNameSize = 100 // Maximum number of bytes in a standard tar name.
fileNamePrefixSize = 155 // Maximum number of ustar extension bytes.
)
// FileInfo returns an os.FileInfo for the Header.
func (h *Header) FileInfo() os.FileInfo {
return headerFileInfo{h}
}
// headerFileInfo implements os.FileInfo.
type headerFileInfo struct {
h *Header
}
func (fi headerFileInfo) Size() int64 { return fi.h.Size }
func (fi headerFileInfo) IsDir() bool { return fi.Mode().IsDir() }
func (fi headerFileInfo) ModTime() time.Time { return fi.h.ModTime }
func (fi headerFileInfo) Sys() interface{} { return fi.h }
// Name returns the base name of the file.
func (fi headerFileInfo) Name() string {
if fi.IsDir() {
return path.Base(path.Clean(fi.h.Name))
}
return path.Base(fi.h.Name)
}
// Mode returns the permission and mode bits for the headerFileInfo.
func (fi headerFileInfo) Mode() (mode os.FileMode) {
// Set file permission bits.
mode = os.FileMode(fi.h.Mode).Perm()
// Set setuid, setgid and sticky bits.
if fi.h.Mode&c_ISUID != 0 {
// setuid
mode |= os.ModeSetuid
}
if fi.h.Mode&c_ISGID != 0 {
// setgid
mode |= os.ModeSetgid
}
if fi.h.Mode&c_ISVTX != 0 {
// sticky
mode |= os.ModeSticky
}
// Set file mode bits.
// clear perm, setuid, setgid and sticky bits.
m := os.FileMode(fi.h.Mode) &^ 07777
if m == c_ISDIR {
// directory
mode |= os.ModeDir
}
if m == c_ISFIFO {
// named pipe (FIFO)
mode |= os.ModeNamedPipe
}
if m == c_ISLNK {
// symbolic link
mode |= os.ModeSymlink
}
if m == c_ISBLK {
// device file
mode |= os.ModeDevice
}
if m == c_ISCHR {
// Unix character device
mode |= os.ModeDevice
mode |= os.ModeCharDevice
}
if m == c_ISSOCK {
// Unix domain socket
mode |= os.ModeSocket
}
switch fi.h.Typeflag {
case TypeSymlink:
// symbolic link
mode |= os.ModeSymlink
case TypeChar:
// character device node
mode |= os.ModeDevice
mode |= os.ModeCharDevice
case TypeBlock:
// block device node
mode |= os.ModeDevice
case TypeDir:
// directory
mode |= os.ModeDir
case TypeFifo:
// fifo node
mode |= os.ModeNamedPipe
}
return mode
}
// sysStat, if non-nil, populates h from system-dependent fields of fi.
var sysStat func(fi os.FileInfo, h *Header) error
// Mode constants from the tar spec.
const (
c_ISUID = 04000 // Set uid
c_ISGID = 02000 // Set gid
c_ISVTX = 01000 // Save text (sticky bit)
c_ISDIR = 040000 // Directory
c_ISFIFO = 010000 // FIFO
c_ISREG = 0100000 // Regular file
c_ISLNK = 0120000 // Symbolic link
c_ISBLK = 060000 // Block special file
c_ISCHR = 020000 // Character special file
c_ISSOCK = 0140000 // Socket
)
// Keywords for the PAX Extended Header
const (
paxAtime = "atime"
paxCharset = "charset"
paxComment = "comment"
paxCtime = "ctime" // please note that ctime is not a valid pax header.
paxCreationTime = "LIBARCHIVE.creationtime"
paxGid = "gid"
paxGname = "gname"
paxLinkpath = "linkpath"
paxMtime = "mtime"
paxPath = "path"
paxSize = "size"
paxUid = "uid"
paxUname = "uname"
paxXattr = "SCHILY.xattr."
paxWindows = "MSWINDOWS."
paxNone = ""
)
// FileInfoHeader creates a partially-populated Header from fi.
// If fi describes a symlink, FileInfoHeader records link as the link target.
// If fi describes a directory, a slash is appended to the name.
// Because os.FileInfo's Name method returns only the base name of
// the file it describes, it may be necessary to modify the Name field
// of the returned header to provide the full path name of the file.
func FileInfoHeader(fi os.FileInfo, link string) (*Header, error) {
if fi == nil {
return nil, errors.New("tar: FileInfo is nil")
}
fm := fi.Mode()
h := &Header{
Name: fi.Name(),
ModTime: fi.ModTime(),
Mode: int64(fm.Perm()), // or'd with c_IS* constants later
}
switch {
case fm.IsRegular():
h.Mode |= c_ISREG
h.Typeflag = TypeReg
h.Size = fi.Size()
case fi.IsDir():
h.Typeflag = TypeDir
h.Mode |= c_ISDIR
h.Name += "/"
case fm&os.ModeSymlink != 0:
h.Typeflag = TypeSymlink
h.Mode |= c_ISLNK
h.Linkname = link
case fm&os.ModeDevice != 0:
if fm&os.ModeCharDevice != 0 {
h.Mode |= c_ISCHR
h.Typeflag = TypeChar
} else {
h.Mode |= c_ISBLK
h.Typeflag = TypeBlock
}
case fm&os.ModeNamedPipe != 0:
h.Typeflag = TypeFifo
h.Mode |= c_ISFIFO
case fm&os.ModeSocket != 0:
h.Mode |= c_ISSOCK
default:
return nil, fmt.Errorf("archive/tar: unknown file mode %v", fm)
}
if fm&os.ModeSetuid != 0 {
h.Mode |= c_ISUID
}
if fm&os.ModeSetgid != 0 {
h.Mode |= c_ISGID
}
if fm&os.ModeSticky != 0 {
h.Mode |= c_ISVTX
}
// If possible, populate additional fields from OS-specific
// FileInfo fields.
if sys, ok := fi.Sys().(*Header); ok {
// This FileInfo came from a Header (not the OS). Use the
// original Header to populate all remaining fields.
h.Uid = sys.Uid
h.Gid = sys.Gid
h.Uname = sys.Uname
h.Gname = sys.Gname
h.AccessTime = sys.AccessTime
h.ChangeTime = sys.ChangeTime
if sys.Xattrs != nil {
h.Xattrs = make(map[string]string)
for k, v := range sys.Xattrs {
h.Xattrs[k] = v
}
}
if sys.Typeflag == TypeLink {
// hard link
h.Typeflag = TypeLink
h.Size = 0
h.Linkname = sys.Linkname
}
}
if sysStat != nil {
return h, sysStat(fi, h)
}
return h, nil
}
var zeroBlock = make([]byte, blockSize)
// POSIX specifies a sum of the unsigned byte values, but the Sun tar uses signed byte values.
// We compute and return both.
func checksum(header []byte) (unsigned int64, signed int64) {
for i := 0; i < len(header); i++ {
if i == 148 {
// The chksum field (header[148:156]) is special: it should be treated as space bytes.
unsigned += ' ' * 8
signed += ' ' * 8
i += 7
continue
}
unsigned += int64(header[i])
signed += int64(int8(header[i]))
}
return
}
type slicer []byte
func (sp *slicer) next(n int) (b []byte) {
s := *sp
b, *sp = s[0:n], s[n:]
return
}
func isASCII(s string) bool {
for _, c := range s {
if c >= 0x80 {
return false
}
}
return true
}
func toASCII(s string) string {
if isASCII(s) {
return s
}
var buf bytes.Buffer
for _, c := range s {
if c < 0x80 {
buf.WriteByte(byte(c))
}
}
return buf.String()
}
// isHeaderOnlyType checks if the given type flag is of the type that has no
// data section even if a size is specified.
func isHeaderOnlyType(flag byte) bool {
switch flag {
case TypeLink, TypeSymlink, TypeChar, TypeBlock, TypeDir, TypeFifo:
return true
default:
return false
}
}

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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package tar_test
import (
"archive/tar"
"bytes"
"fmt"
"io"
"log"
"os"
)
func Example() {
// Create a buffer to write our archive to.
buf := new(bytes.Buffer)
// Create a new tar archive.
tw := tar.NewWriter(buf)
// Add some files to the archive.
var files = []struct {
Name, Body string
}{
{"readme.txt", "This archive contains some text files."},
{"gopher.txt", "Gopher names:\nGeorge\nGeoffrey\nGonzo"},
{"todo.txt", "Get animal handling license."},
}
for _, file := range files {
hdr := &tar.Header{
Name: file.Name,
Mode: 0600,
Size: int64(len(file.Body)),
}
if err := tw.WriteHeader(hdr); err != nil {
log.Fatalln(err)
}
if _, err := tw.Write([]byte(file.Body)); err != nil {
log.Fatalln(err)
}
}
// Make sure to check the error on Close.
if err := tw.Close(); err != nil {
log.Fatalln(err)
}
// Open the tar archive for reading.
r := bytes.NewReader(buf.Bytes())
tr := tar.NewReader(r)
// Iterate through the files in the archive.
for {
hdr, err := tr.Next()
if err == io.EOF {
// end of tar archive
break
}
if err != nil {
log.Fatalln(err)
}
fmt.Printf("Contents of %s:\n", hdr.Name)
if _, err := io.Copy(os.Stdout, tr); err != nil {
log.Fatalln(err)
}
fmt.Println()
}
// Output:
// Contents of readme.txt:
// This archive contains some text files.
// Contents of gopher.txt:
// Gopher names:
// George
// Geoffrey
// Gonzo
// Contents of todo.txt:
// Get animal handling license.
}

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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build linux dragonfly openbsd solaris
package tar
import (
"syscall"
"time"
)
func statAtime(st *syscall.Stat_t) time.Time {
return time.Unix(st.Atim.Unix())
}
func statCtime(st *syscall.Stat_t) time.Time {
return time.Unix(st.Ctim.Unix())
}

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vendor/github.com/Microsoft/go-winio/archive/tar/stat_atimespec.go generated vendored Normal file
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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build darwin freebsd netbsd
package tar
import (
"syscall"
"time"
)
func statAtime(st *syscall.Stat_t) time.Time {
return time.Unix(st.Atimespec.Unix())
}
func statCtime(st *syscall.Stat_t) time.Time {
return time.Unix(st.Ctimespec.Unix())
}

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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build linux darwin dragonfly freebsd openbsd netbsd solaris
package tar
import (
"os"
"syscall"
)
func init() {
sysStat = statUnix
}
func statUnix(fi os.FileInfo, h *Header) error {
sys, ok := fi.Sys().(*syscall.Stat_t)
if !ok {
return nil
}
h.Uid = int(sys.Uid)
h.Gid = int(sys.Gid)
// TODO(bradfitz): populate username & group. os/user
// doesn't cache LookupId lookups, and lacks group
// lookup functions.
h.AccessTime = statAtime(sys)
h.ChangeTime = statCtime(sys)
// TODO(bradfitz): major/minor device numbers?
return nil
}

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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package tar
import (
"bytes"
"io/ioutil"
"os"
"path"
"reflect"
"strings"
"testing"
"time"
)
func TestFileInfoHeader(t *testing.T) {
fi, err := os.Stat("testdata/small.txt")
if err != nil {
t.Fatal(err)
}
h, err := FileInfoHeader(fi, "")
if err != nil {
t.Fatalf("FileInfoHeader: %v", err)
}
if g, e := h.Name, "small.txt"; g != e {
t.Errorf("Name = %q; want %q", g, e)
}
if g, e := h.Mode, int64(fi.Mode().Perm())|c_ISREG; g != e {
t.Errorf("Mode = %#o; want %#o", g, e)
}
if g, e := h.Size, int64(5); g != e {
t.Errorf("Size = %v; want %v", g, e)
}
if g, e := h.ModTime, fi.ModTime(); !g.Equal(e) {
t.Errorf("ModTime = %v; want %v", g, e)
}
// FileInfoHeader should error when passing nil FileInfo
if _, err := FileInfoHeader(nil, ""); err == nil {
t.Fatalf("Expected error when passing nil to FileInfoHeader")
}
}
func TestFileInfoHeaderDir(t *testing.T) {
fi, err := os.Stat("testdata")
if err != nil {
t.Fatal(err)
}
h, err := FileInfoHeader(fi, "")
if err != nil {
t.Fatalf("FileInfoHeader: %v", err)
}
if g, e := h.Name, "testdata/"; g != e {
t.Errorf("Name = %q; want %q", g, e)
}
// Ignoring c_ISGID for golang.org/issue/4867
if g, e := h.Mode&^c_ISGID, int64(fi.Mode().Perm())|c_ISDIR; g != e {
t.Errorf("Mode = %#o; want %#o", g, e)
}
if g, e := h.Size, int64(0); g != e {
t.Errorf("Size = %v; want %v", g, e)
}
if g, e := h.ModTime, fi.ModTime(); !g.Equal(e) {
t.Errorf("ModTime = %v; want %v", g, e)
}
}
func TestFileInfoHeaderSymlink(t *testing.T) {
h, err := FileInfoHeader(symlink{}, "some-target")
if err != nil {
t.Fatal(err)
}
if g, e := h.Name, "some-symlink"; g != e {
t.Errorf("Name = %q; want %q", g, e)
}
if g, e := h.Linkname, "some-target"; g != e {
t.Errorf("Linkname = %q; want %q", g, e)
}
}
type symlink struct{}
func (symlink) Name() string { return "some-symlink" }
func (symlink) Size() int64 { return 0 }
func (symlink) Mode() os.FileMode { return os.ModeSymlink }
func (symlink) ModTime() time.Time { return time.Time{} }
func (symlink) IsDir() bool { return false }
func (symlink) Sys() interface{} { return nil }
func TestRoundTrip(t *testing.T) {
data := []byte("some file contents")
var b bytes.Buffer
tw := NewWriter(&b)
hdr := &Header{
Name: "file.txt",
Uid: 1 << 21, // too big for 8 octal digits
Size: int64(len(data)),
ModTime: time.Now(),
}
// tar only supports second precision.
hdr.ModTime = hdr.ModTime.Add(-time.Duration(hdr.ModTime.Nanosecond()) * time.Nanosecond)
if err := tw.WriteHeader(hdr); err != nil {
t.Fatalf("tw.WriteHeader: %v", err)
}
if _, err := tw.Write(data); err != nil {
t.Fatalf("tw.Write: %v", err)
}
if err := tw.Close(); err != nil {
t.Fatalf("tw.Close: %v", err)
}
// Read it back.
tr := NewReader(&b)
rHdr, err := tr.Next()
if err != nil {
t.Fatalf("tr.Next: %v", err)
}
if !reflect.DeepEqual(rHdr, hdr) {
t.Errorf("Header mismatch.\n got %+v\nwant %+v", rHdr, hdr)
}
rData, err := ioutil.ReadAll(tr)
if err != nil {
t.Fatalf("Read: %v", err)
}
if !bytes.Equal(rData, data) {
t.Errorf("Data mismatch.\n got %q\nwant %q", rData, data)
}
}
type headerRoundTripTest struct {
h *Header
fm os.FileMode
}
func TestHeaderRoundTrip(t *testing.T) {
golden := []headerRoundTripTest{
// regular file.
{
h: &Header{
Name: "test.txt",
Mode: 0644 | c_ISREG,
Size: 12,
ModTime: time.Unix(1360600916, 0),
Typeflag: TypeReg,
},
fm: 0644,
},
// symbolic link.
{
h: &Header{
Name: "link.txt",
Mode: 0777 | c_ISLNK,
Size: 0,
ModTime: time.Unix(1360600852, 0),
Typeflag: TypeSymlink,
},
fm: 0777 | os.ModeSymlink,
},
// character device node.
{
h: &Header{
Name: "dev/null",
Mode: 0666 | c_ISCHR,
Size: 0,
ModTime: time.Unix(1360578951, 0),
Typeflag: TypeChar,
},
fm: 0666 | os.ModeDevice | os.ModeCharDevice,
},
// block device node.
{
h: &Header{
Name: "dev/sda",
Mode: 0660 | c_ISBLK,
Size: 0,
ModTime: time.Unix(1360578954, 0),
Typeflag: TypeBlock,
},
fm: 0660 | os.ModeDevice,
},
// directory.
{
h: &Header{
Name: "dir/",
Mode: 0755 | c_ISDIR,
Size: 0,
ModTime: time.Unix(1360601116, 0),
Typeflag: TypeDir,
},
fm: 0755 | os.ModeDir,
},
// fifo node.
{
h: &Header{
Name: "dev/initctl",
Mode: 0600 | c_ISFIFO,
Size: 0,
ModTime: time.Unix(1360578949, 0),
Typeflag: TypeFifo,
},
fm: 0600 | os.ModeNamedPipe,
},
// setuid.
{
h: &Header{
Name: "bin/su",
Mode: 0755 | c_ISREG | c_ISUID,
Size: 23232,
ModTime: time.Unix(1355405093, 0),
Typeflag: TypeReg,
},
fm: 0755 | os.ModeSetuid,
},
// setguid.
{
h: &Header{
Name: "group.txt",
Mode: 0750 | c_ISREG | c_ISGID,
Size: 0,
ModTime: time.Unix(1360602346, 0),
Typeflag: TypeReg,
},
fm: 0750 | os.ModeSetgid,
},
// sticky.
{
h: &Header{
Name: "sticky.txt",
Mode: 0600 | c_ISREG | c_ISVTX,
Size: 7,
ModTime: time.Unix(1360602540, 0),
Typeflag: TypeReg,
},
fm: 0600 | os.ModeSticky,
},
// hard link.
{
h: &Header{
Name: "hard.txt",
Mode: 0644 | c_ISREG,
Size: 0,
Linkname: "file.txt",
ModTime: time.Unix(1360600916, 0),
Typeflag: TypeLink,
},
fm: 0644,
},
// More information.
{
h: &Header{
Name: "info.txt",
Mode: 0600 | c_ISREG,
Size: 0,
Uid: 1000,
Gid: 1000,
ModTime: time.Unix(1360602540, 0),
Uname: "slartibartfast",
Gname: "users",
Typeflag: TypeReg,
},
fm: 0600,
},
}
for i, g := range golden {
fi := g.h.FileInfo()
h2, err := FileInfoHeader(fi, "")
if err != nil {
t.Error(err)
continue
}
if strings.Contains(fi.Name(), "/") {
t.Errorf("FileInfo of %q contains slash: %q", g.h.Name, fi.Name())
}
name := path.Base(g.h.Name)
if fi.IsDir() {
name += "/"
}
if got, want := h2.Name, name; got != want {
t.Errorf("i=%d: Name: got %v, want %v", i, got, want)
}
if got, want := h2.Size, g.h.Size; got != want {
t.Errorf("i=%d: Size: got %v, want %v", i, got, want)
}
if got, want := h2.Uid, g.h.Uid; got != want {
t.Errorf("i=%d: Uid: got %d, want %d", i, got, want)
}
if got, want := h2.Gid, g.h.Gid; got != want {
t.Errorf("i=%d: Gid: got %d, want %d", i, got, want)
}
if got, want := h2.Uname, g.h.Uname; got != want {
t.Errorf("i=%d: Uname: got %q, want %q", i, got, want)
}
if got, want := h2.Gname, g.h.Gname; got != want {
t.Errorf("i=%d: Gname: got %q, want %q", i, got, want)
}
if got, want := h2.Linkname, g.h.Linkname; got != want {
t.Errorf("i=%d: Linkname: got %v, want %v", i, got, want)
}
if got, want := h2.Typeflag, g.h.Typeflag; got != want {
t.Logf("%#v %#v", g.h, fi.Sys())
t.Errorf("i=%d: Typeflag: got %q, want %q", i, got, want)
}
if got, want := h2.Mode, g.h.Mode; got != want {
t.Errorf("i=%d: Mode: got %o, want %o", i, got, want)
}
if got, want := fi.Mode(), g.fm; got != want {
t.Errorf("i=%d: fi.Mode: got %o, want %o", i, got, want)
}
if got, want := h2.AccessTime, g.h.AccessTime; got != want {
t.Errorf("i=%d: AccessTime: got %v, want %v", i, got, want)
}
if got, want := h2.ChangeTime, g.h.ChangeTime; got != want {
t.Errorf("i=%d: ChangeTime: got %v, want %v", i, got, want)
}
if got, want := h2.ModTime, g.h.ModTime; got != want {
t.Errorf("i=%d: ModTime: got %v, want %v", i, got, want)
}
if sysh, ok := fi.Sys().(*Header); !ok || sysh != g.h {
t.Errorf("i=%d: Sys didn't return original *Header", i)
}
}
}

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1
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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package tar
// TODO(dsymonds):
// - catch more errors (no first header, etc.)
import (
"bytes"
"errors"
"fmt"
"io"
"path"
"sort"
"strconv"
"strings"
"time"
)
var (
ErrWriteTooLong = errors.New("archive/tar: write too long")
ErrFieldTooLong = errors.New("archive/tar: header field too long")
ErrWriteAfterClose = errors.New("archive/tar: write after close")
errInvalidHeader = errors.New("archive/tar: header field too long or contains invalid values")
)
// A Writer provides sequential writing of a tar archive in POSIX.1 format.
// A tar archive consists of a sequence of files.
// Call WriteHeader to begin a new file, and then call Write to supply that file's data,
// writing at most hdr.Size bytes in total.
type Writer struct {
w io.Writer
err error
nb int64 // number of unwritten bytes for current file entry
pad int64 // amount of padding to write after current file entry
closed bool
usedBinary bool // whether the binary numeric field extension was used
preferPax bool // use pax header instead of binary numeric header
hdrBuff [blockSize]byte // buffer to use in writeHeader when writing a regular header
paxHdrBuff [blockSize]byte // buffer to use in writeHeader when writing a pax header
}
type formatter struct {
err error // Last error seen
}
// NewWriter creates a new Writer writing to w.
func NewWriter(w io.Writer) *Writer { return &Writer{w: w, preferPax: true} }
// Flush finishes writing the current file (optional).
func (tw *Writer) Flush() error {
if tw.nb > 0 {
tw.err = fmt.Errorf("archive/tar: missed writing %d bytes", tw.nb)
return tw.err
}
n := tw.nb + tw.pad
for n > 0 && tw.err == nil {
nr := n
if nr > blockSize {
nr = blockSize
}
var nw int
nw, tw.err = tw.w.Write(zeroBlock[0:nr])
n -= int64(nw)
}
tw.nb = 0
tw.pad = 0
return tw.err
}
// Write s into b, terminating it with a NUL if there is room.
func (f *formatter) formatString(b []byte, s string) {
if len(s) > len(b) {
f.err = ErrFieldTooLong
return
}
ascii := toASCII(s)
copy(b, ascii)
if len(ascii) < len(b) {
b[len(ascii)] = 0
}
}
// Encode x as an octal ASCII string and write it into b with leading zeros.
func (f *formatter) formatOctal(b []byte, x int64) {
s := strconv.FormatInt(x, 8)
// leading zeros, but leave room for a NUL.
for len(s)+1 < len(b) {
s = "0" + s
}
f.formatString(b, s)
}
// fitsInBase256 reports whether x can be encoded into n bytes using base-256
// encoding. Unlike octal encoding, base-256 encoding does not require that the
// string ends with a NUL character. Thus, all n bytes are available for output.
//
// If operating in binary mode, this assumes strict GNU binary mode; which means
// that the first byte can only be either 0x80 or 0xff. Thus, the first byte is
// equivalent to the sign bit in two's complement form.
func fitsInBase256(n int, x int64) bool {
var binBits = uint(n-1) * 8
return n >= 9 || (x >= -1<<binBits && x < 1<<binBits)
}
// Write x into b, as binary (GNUtar/star extension).
func (f *formatter) formatNumeric(b []byte, x int64) {
if fitsInBase256(len(b), x) {
for i := len(b) - 1; i >= 0; i-- {
b[i] = byte(x)
x >>= 8
}
b[0] |= 0x80 // Highest bit indicates binary format
return
}
f.formatOctal(b, 0) // Last resort, just write zero
f.err = ErrFieldTooLong
}
var (
minTime = time.Unix(0, 0)
// There is room for 11 octal digits (33 bits) of mtime.
maxTime = minTime.Add((1<<33 - 1) * time.Second)
)
// WriteHeader writes hdr and prepares to accept the file's contents.
// WriteHeader calls Flush if it is not the first header.
// Calling after a Close will return ErrWriteAfterClose.
func (tw *Writer) WriteHeader(hdr *Header) error {
return tw.writeHeader(hdr, true)
}
// WriteHeader writes hdr and prepares to accept the file's contents.
// WriteHeader calls Flush if it is not the first header.
// Calling after a Close will return ErrWriteAfterClose.
// As this method is called internally by writePax header to allow it to
// suppress writing the pax header.
func (tw *Writer) writeHeader(hdr *Header, allowPax bool) error {
if tw.closed {
return ErrWriteAfterClose
}
if tw.err == nil {
tw.Flush()
}
if tw.err != nil {
return tw.err
}
// a map to hold pax header records, if any are needed
paxHeaders := make(map[string]string)
// TODO(shanemhansen): we might want to use PAX headers for
// subsecond time resolution, but for now let's just capture
// too long fields or non ascii characters
var f formatter
var header []byte
// We need to select which scratch buffer to use carefully,
// since this method is called recursively to write PAX headers.
// If allowPax is true, this is the non-recursive call, and we will use hdrBuff.
// If allowPax is false, we are being called by writePAXHeader, and hdrBuff is
// already being used by the non-recursive call, so we must use paxHdrBuff.
header = tw.hdrBuff[:]
if !allowPax {
header = tw.paxHdrBuff[:]
}
copy(header, zeroBlock)
s := slicer(header)
// Wrappers around formatter that automatically sets paxHeaders if the
// argument extends beyond the capacity of the input byte slice.
var formatString = func(b []byte, s string, paxKeyword string) {
needsPaxHeader := paxKeyword != paxNone && len(s) > len(b) || !isASCII(s)
if needsPaxHeader {
paxHeaders[paxKeyword] = s
return
}
f.formatString(b, s)
}
var formatNumeric = func(b []byte, x int64, paxKeyword string) {
// Try octal first.
s := strconv.FormatInt(x, 8)
if len(s) < len(b) {
f.formatOctal(b, x)
return
}
// If it is too long for octal, and PAX is preferred, use a PAX header.
if paxKeyword != paxNone && tw.preferPax {
f.formatOctal(b, 0)
s := strconv.FormatInt(x, 10)
paxHeaders[paxKeyword] = s
return
}
tw.usedBinary = true
f.formatNumeric(b, x)
}
var formatTime = func(b []byte, t time.Time, paxKeyword string) {
var unixTime int64
if !t.Before(minTime) && !t.After(maxTime) {
unixTime = t.Unix()
}
formatNumeric(b, unixTime, paxNone)
// Write a PAX header if the time didn't fit precisely.
if paxKeyword != "" && tw.preferPax && allowPax && (t.Nanosecond() != 0 || !t.Before(minTime) || !t.After(maxTime)) {
paxHeaders[paxKeyword] = formatPAXTime(t)
}
}
// keep a reference to the filename to allow to overwrite it later if we detect that we can use ustar longnames instead of pax
pathHeaderBytes := s.next(fileNameSize)
formatString(pathHeaderBytes, hdr.Name, paxPath)
f.formatOctal(s.next(8), hdr.Mode) // 100:108
formatNumeric(s.next(8), int64(hdr.Uid), paxUid) // 108:116
formatNumeric(s.next(8), int64(hdr.Gid), paxGid) // 116:124
formatNumeric(s.next(12), hdr.Size, paxSize) // 124:136
formatTime(s.next(12), hdr.ModTime, paxMtime) // 136:148
s.next(8) // chksum (148:156)
s.next(1)[0] = hdr.Typeflag // 156:157
formatString(s.next(100), hdr.Linkname, paxLinkpath)
copy(s.next(8), []byte("ustar\x0000")) // 257:265
formatString(s.next(32), hdr.Uname, paxUname) // 265:297
formatString(s.next(32), hdr.Gname, paxGname) // 297:329
formatNumeric(s.next(8), hdr.Devmajor, paxNone) // 329:337
formatNumeric(s.next(8), hdr.Devminor, paxNone) // 337:345
// keep a reference to the prefix to allow to overwrite it later if we detect that we can use ustar longnames instead of pax
prefixHeaderBytes := s.next(155)
formatString(prefixHeaderBytes, "", paxNone) // 345:500 prefix
// Use the GNU magic instead of POSIX magic if we used any GNU extensions.
if tw.usedBinary {
copy(header[257:265], []byte("ustar \x00"))
}
_, paxPathUsed := paxHeaders[paxPath]
// try to use a ustar header when only the name is too long
if !tw.preferPax && len(paxHeaders) == 1 && paxPathUsed {
prefix, suffix, ok := splitUSTARPath(hdr.Name)
if ok {
// Since we can encode in USTAR format, disable PAX header.
delete(paxHeaders, paxPath)
// Update the path fields
formatString(pathHeaderBytes, suffix, paxNone)
formatString(prefixHeaderBytes, prefix, paxNone)
}
}
// The chksum field is terminated by a NUL and a space.
// This is different from the other octal fields.
chksum, _ := checksum(header)
f.formatOctal(header[148:155], chksum) // Never fails
header[155] = ' '
// Check if there were any formatting errors.
if f.err != nil {
tw.err = f.err
return tw.err
}
if allowPax {
if !hdr.AccessTime.IsZero() {
paxHeaders[paxAtime] = formatPAXTime(hdr.AccessTime)
}
if !hdr.ChangeTime.IsZero() {
paxHeaders[paxCtime] = formatPAXTime(hdr.ChangeTime)
}
if !hdr.CreationTime.IsZero() {
paxHeaders[paxCreationTime] = formatPAXTime(hdr.CreationTime)
}
for k, v := range hdr.Xattrs {
paxHeaders[paxXattr+k] = v
}
for k, v := range hdr.Winheaders {
paxHeaders[paxWindows+k] = v
}
}
if len(paxHeaders) > 0 {
if !allowPax {
return errInvalidHeader
}
if err := tw.writePAXHeader(hdr, paxHeaders); err != nil {
return err
}
}
tw.nb = int64(hdr.Size)
tw.pad = (blockSize - (tw.nb % blockSize)) % blockSize
_, tw.err = tw.w.Write(header)
return tw.err
}
func formatPAXTime(t time.Time) string {
sec := t.Unix()
usec := t.Nanosecond()
s := strconv.FormatInt(sec, 10)
if usec != 0 {
s = fmt.Sprintf("%s.%09d", s, usec)
}
return s
}
// splitUSTARPath splits a path according to USTAR prefix and suffix rules.
// If the path is not splittable, then it will return ("", "", false).
func splitUSTARPath(name string) (prefix, suffix string, ok bool) {
length := len(name)
if length <= fileNameSize || !isASCII(name) {
return "", "", false
} else if length > fileNamePrefixSize+1 {
length = fileNamePrefixSize + 1
} else if name[length-1] == '/' {
length--
}
i := strings.LastIndex(name[:length], "/")
nlen := len(name) - i - 1 // nlen is length of suffix
plen := i // plen is length of prefix
if i <= 0 || nlen > fileNameSize || nlen == 0 || plen > fileNamePrefixSize {
return "", "", false
}
return name[:i], name[i+1:], true
}
// writePaxHeader writes an extended pax header to the
// archive.
func (tw *Writer) writePAXHeader(hdr *Header, paxHeaders map[string]string) error {
// Prepare extended header
ext := new(Header)
ext.Typeflag = TypeXHeader
// Setting ModTime is required for reader parsing to
// succeed, and seems harmless enough.
ext.ModTime = hdr.ModTime
// The spec asks that we namespace our pseudo files
// with the current pid. However, this results in differing outputs
// for identical inputs. As such, the constant 0 is now used instead.
// golang.org/issue/12358
dir, file := path.Split(hdr.Name)
fullName := path.Join(dir, "PaxHeaders.0", file)
ascii := toASCII(fullName)
if len(ascii) > 100 {
ascii = ascii[:100]
}
ext.Name = ascii
// Construct the body
var buf bytes.Buffer
// Keys are sorted before writing to body to allow deterministic output.
var keys []string
for k := range paxHeaders {
keys = append(keys, k)
}
sort.Strings(keys)
for _, k := range keys {
fmt.Fprint(&buf, formatPAXRecord(k, paxHeaders[k]))
}
ext.Size = int64(len(buf.Bytes()))
if err := tw.writeHeader(ext, false); err != nil {
return err
}
if _, err := tw.Write(buf.Bytes()); err != nil {
return err
}
if err := tw.Flush(); err != nil {
return err
}
return nil
}
// formatPAXRecord formats a single PAX record, prefixing it with the
// appropriate length.
func formatPAXRecord(k, v string) string {
const padding = 3 // Extra padding for ' ', '=', and '\n'
size := len(k) + len(v) + padding
size += len(strconv.Itoa(size))
record := fmt.Sprintf("%d %s=%s\n", size, k, v)
// Final adjustment if adding size field increased the record size.
if len(record) != size {
size = len(record)
record = fmt.Sprintf("%d %s=%s\n", size, k, v)
}
return record
}
// Write writes to the current entry in the tar archive.
// Write returns the error ErrWriteTooLong if more than
// hdr.Size bytes are written after WriteHeader.
func (tw *Writer) Write(b []byte) (n int, err error) {
if tw.closed {
err = ErrWriteAfterClose
return
}
overwrite := false
if int64(len(b)) > tw.nb {
b = b[0:tw.nb]
overwrite = true
}
n, err = tw.w.Write(b)
tw.nb -= int64(n)
if err == nil && overwrite {
err = ErrWriteTooLong
return
}
tw.err = err
return
}
// Close closes the tar archive, flushing any unwritten
// data to the underlying writer.
func (tw *Writer) Close() error {
if tw.err != nil || tw.closed {
return tw.err
}
tw.Flush()
tw.closed = true
if tw.err != nil {
return tw.err
}
// trailer: two zero blocks
for i := 0; i < 2; i++ {
_, tw.err = tw.w.Write(zeroBlock)
if tw.err != nil {
break
}
}
return tw.err
}

739
vendor/github.com/Microsoft/go-winio/archive/tar/writer_test.go generated vendored Normal file
View file

@ -0,0 +1,739 @@
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package tar
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"math"
"os"
"reflect"
"sort"
"strings"
"testing"
"testing/iotest"
"time"
)
type writerTestEntry struct {
header *Header
contents string
}
type writerTest struct {
file string // filename of expected output
entries []*writerTestEntry
}
var writerTests = []*writerTest{
// The writer test file was produced with this command:
// tar (GNU tar) 1.26
// ln -s small.txt link.txt
// tar -b 1 --format=ustar -c -f writer.tar small.txt small2.txt link.txt
{
file: "testdata/writer.tar",
entries: []*writerTestEntry{
{
header: &Header{
Name: "small.txt",
Mode: 0640,
Uid: 73025,
Gid: 5000,
Size: 5,
ModTime: time.Unix(1246508266, 0),
Typeflag: '0',
Uname: "dsymonds",
Gname: "eng",
},
contents: "Kilts",
},
{
header: &Header{
Name: "small2.txt",
Mode: 0640,
Uid: 73025,
Gid: 5000,
Size: 11,
ModTime: time.Unix(1245217492, 0),
Typeflag: '0',
Uname: "dsymonds",
Gname: "eng",
},
contents: "Google.com\n",
},
{
header: &Header{
Name: "link.txt",
Mode: 0777,
Uid: 1000,
Gid: 1000,
Size: 0,
ModTime: time.Unix(1314603082, 0),
Typeflag: '2',
Linkname: "small.txt",
Uname: "strings",
Gname: "strings",
},
// no contents
},
},
},
// The truncated test file was produced using these commands:
// dd if=/dev/zero bs=1048576 count=16384 > /tmp/16gig.txt
// tar -b 1 -c -f- /tmp/16gig.txt | dd bs=512 count=8 > writer-big.tar
{
file: "testdata/writer-big.tar",
entries: []*writerTestEntry{
{
header: &Header{
Name: "tmp/16gig.txt",
Mode: 0640,
Uid: 73025,
Gid: 5000,
Size: 16 << 30,
ModTime: time.Unix(1254699560, 0),
Typeflag: '0',
Uname: "dsymonds",
Gname: "eng",
},
// fake contents
contents: strings.Repeat("\x00", 4<<10),
},
},
},
// The truncated test file was produced using these commands:
// dd if=/dev/zero bs=1048576 count=16384 > (longname/)*15 /16gig.txt
// tar -b 1 -c -f- (longname/)*15 /16gig.txt | dd bs=512 count=8 > writer-big-long.tar
{
file: "testdata/writer-big-long.tar",
entries: []*writerTestEntry{
{
header: &Header{
Name: strings.Repeat("longname/", 15) + "16gig.txt",
Mode: 0644,
Uid: 1000,
Gid: 1000,
Size: 16 << 30,
ModTime: time.Unix(1399583047, 0),
Typeflag: '0',
Uname: "guillaume",
Gname: "guillaume",
},
// fake contents
contents: strings.Repeat("\x00", 4<<10),
},
},
},
// This file was produced using gnu tar 1.17
// gnutar -b 4 --format=ustar (longname/)*15 + file.txt
{
file: "testdata/ustar.tar",
entries: []*writerTestEntry{
{
header: &Header{
Name: strings.Repeat("longname/", 15) + "file.txt",
Mode: 0644,
Uid: 0765,
Gid: 024,
Size: 06,
ModTime: time.Unix(1360135598, 0),
Typeflag: '0',
Uname: "shane",
Gname: "staff",
},
contents: "hello\n",
},
},
},
// This file was produced using gnu tar 1.26
// echo "Slartibartfast" > file.txt
// ln file.txt hard.txt
// tar -b 1 --format=ustar -c -f hardlink.tar file.txt hard.txt
{
file: "testdata/hardlink.tar",
entries: []*writerTestEntry{
{
header: &Header{
Name: "file.txt",
Mode: 0644,
Uid: 1000,
Gid: 100,
Size: 15,
ModTime: time.Unix(1425484303, 0),
Typeflag: '0',
Uname: "vbatts",
Gname: "users",
},
contents: "Slartibartfast\n",
},
{
header: &Header{
Name: "hard.txt",
Mode: 0644,
Uid: 1000,
Gid: 100,
Size: 0,
ModTime: time.Unix(1425484303, 0),
Typeflag: '1',
Linkname: "file.txt",
Uname: "vbatts",
Gname: "users",
},
// no contents
},
},
},
}
// Render byte array in a two-character hexadecimal string, spaced for easy visual inspection.
func bytestr(offset int, b []byte) string {
const rowLen = 32
s := fmt.Sprintf("%04x ", offset)
for _, ch := range b {
switch {
case '0' <= ch && ch <= '9', 'A' <= ch && ch <= 'Z', 'a' <= ch && ch <= 'z':
s += fmt.Sprintf(" %c", ch)
default:
s += fmt.Sprintf(" %02x", ch)
}
}
return s
}
// Render a pseudo-diff between two blocks of bytes.
func bytediff(a []byte, b []byte) string {
const rowLen = 32
s := fmt.Sprintf("(%d bytes vs. %d bytes)\n", len(a), len(b))
for offset := 0; len(a)+len(b) > 0; offset += rowLen {
na, nb := rowLen, rowLen
if na > len(a) {
na = len(a)
}
if nb > len(b) {
nb = len(b)
}
sa := bytestr(offset, a[0:na])
sb := bytestr(offset, b[0:nb])
if sa != sb {
s += fmt.Sprintf("-%v\n+%v\n", sa, sb)
}
a = a[na:]
b = b[nb:]
}
return s
}
func TestWriter(t *testing.T) {
testLoop:
for i, test := range writerTests {
expected, err := ioutil.ReadFile(test.file)
if err != nil {
t.Errorf("test %d: Unexpected error: %v", i, err)
continue
}
buf := new(bytes.Buffer)
tw := NewWriter(iotest.TruncateWriter(buf, 4<<10)) // only catch the first 4 KB
big := false
for j, entry := range test.entries {
big = big || entry.header.Size > 1<<10
if err := tw.WriteHeader(entry.header); err != nil {
t.Errorf("test %d, entry %d: Failed writing header: %v", i, j, err)
continue testLoop
}
if _, err := io.WriteString(tw, entry.contents); err != nil {
t.Errorf("test %d, entry %d: Failed writing contents: %v", i, j, err)
continue testLoop
}
}
// Only interested in Close failures for the small tests.
if err := tw.Close(); err != nil && !big {
t.Errorf("test %d: Failed closing archive: %v", i, err)
continue testLoop
}
actual := buf.Bytes()
if !bytes.Equal(expected, actual) {
t.Errorf("test %d: Incorrect result: (-=expected, +=actual)\n%v",
i, bytediff(expected, actual))
}
if testing.Short() { // The second test is expensive.
break
}
}
}
func TestPax(t *testing.T) {
// Create an archive with a large name
fileinfo, err := os.Stat("testdata/small.txt")
if err != nil {
t.Fatal(err)
}
hdr, err := FileInfoHeader(fileinfo, "")
if err != nil {
t.Fatalf("os.Stat: %v", err)
}
// Force a PAX long name to be written
longName := strings.Repeat("ab", 100)
contents := strings.Repeat(" ", int(hdr.Size))
hdr.Name = longName
var buf bytes.Buffer
writer := NewWriter(&buf)
if err := writer.WriteHeader(hdr); err != nil {
t.Fatal(err)
}
if _, err = writer.Write([]byte(contents)); err != nil {
t.Fatal(err)
}
if err := writer.Close(); err != nil {
t.Fatal(err)
}
// Simple test to make sure PAX extensions are in effect
if !bytes.Contains(buf.Bytes(), []byte("PaxHeaders.0")) {
t.Fatal("Expected at least one PAX header to be written.")
}
// Test that we can get a long name back out of the archive.
reader := NewReader(&buf)
hdr, err = reader.Next()
if err != nil {
t.Fatal(err)
}
if hdr.Name != longName {
t.Fatal("Couldn't recover long file name")
}
}
func TestPaxSymlink(t *testing.T) {
// Create an archive with a large linkname
fileinfo, err := os.Stat("testdata/small.txt")
if err != nil {
t.Fatal(err)
}
hdr, err := FileInfoHeader(fileinfo, "")
hdr.Typeflag = TypeSymlink
if err != nil {
t.Fatalf("os.Stat:1 %v", err)
}
// Force a PAX long linkname to be written
longLinkname := strings.Repeat("1234567890/1234567890", 10)
hdr.Linkname = longLinkname
hdr.Size = 0
var buf bytes.Buffer
writer := NewWriter(&buf)
if err := writer.WriteHeader(hdr); err != nil {
t.Fatal(err)
}
if err := writer.Close(); err != nil {
t.Fatal(err)
}
// Simple test to make sure PAX extensions are in effect
if !bytes.Contains(buf.Bytes(), []byte("PaxHeaders.0")) {
t.Fatal("Expected at least one PAX header to be written.")
}
// Test that we can get a long name back out of the archive.
reader := NewReader(&buf)
hdr, err = reader.Next()
if err != nil {
t.Fatal(err)
}
if hdr.Linkname != longLinkname {
t.Fatal("Couldn't recover long link name")
}
}
func TestPaxNonAscii(t *testing.T) {
// Create an archive with non ascii. These should trigger a pax header
// because pax headers have a defined utf-8 encoding.
fileinfo, err := os.Stat("testdata/small.txt")
if err != nil {
t.Fatal(err)
}
hdr, err := FileInfoHeader(fileinfo, "")
if err != nil {
t.Fatalf("os.Stat:1 %v", err)
}
// some sample data
chineseFilename := "文件名"
chineseGroupname := "組"
chineseUsername := "用戶名"
hdr.Name = chineseFilename
hdr.Gname = chineseGroupname
hdr.Uname = chineseUsername
contents := strings.Repeat(" ", int(hdr.Size))
var buf bytes.Buffer
writer := NewWriter(&buf)
if err := writer.WriteHeader(hdr); err != nil {
t.Fatal(err)
}
if _, err = writer.Write([]byte(contents)); err != nil {
t.Fatal(err)
}
if err := writer.Close(); err != nil {
t.Fatal(err)
}
// Simple test to make sure PAX extensions are in effect
if !bytes.Contains(buf.Bytes(), []byte("PaxHeaders.0")) {
t.Fatal("Expected at least one PAX header to be written.")
}
// Test that we can get a long name back out of the archive.
reader := NewReader(&buf)
hdr, err = reader.Next()
if err != nil {
t.Fatal(err)
}
if hdr.Name != chineseFilename {
t.Fatal("Couldn't recover unicode name")
}
if hdr.Gname != chineseGroupname {
t.Fatal("Couldn't recover unicode group")
}
if hdr.Uname != chineseUsername {
t.Fatal("Couldn't recover unicode user")
}
}
func TestPaxXattrs(t *testing.T) {
xattrs := map[string]string{
"user.key": "value",
}
// Create an archive with an xattr
fileinfo, err := os.Stat("testdata/small.txt")
if err != nil {
t.Fatal(err)
}
hdr, err := FileInfoHeader(fileinfo, "")
if err != nil {
t.Fatalf("os.Stat: %v", err)
}
contents := "Kilts"
hdr.Xattrs = xattrs
var buf bytes.Buffer
writer := NewWriter(&buf)
if err := writer.WriteHeader(hdr); err != nil {
t.Fatal(err)
}
if _, err = writer.Write([]byte(contents)); err != nil {
t.Fatal(err)
}
if err := writer.Close(); err != nil {
t.Fatal(err)
}
// Test that we can get the xattrs back out of the archive.
reader := NewReader(&buf)
hdr, err = reader.Next()
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(hdr.Xattrs, xattrs) {
t.Fatalf("xattrs did not survive round trip: got %+v, want %+v",
hdr.Xattrs, xattrs)
}
}
func TestPaxHeadersSorted(t *testing.T) {
fileinfo, err := os.Stat("testdata/small.txt")
if err != nil {
t.Fatal(err)
}
hdr, err := FileInfoHeader(fileinfo, "")
if err != nil {
t.Fatalf("os.Stat: %v", err)
}
contents := strings.Repeat(" ", int(hdr.Size))
hdr.Xattrs = map[string]string{
"foo": "foo",
"bar": "bar",
"baz": "baz",
"qux": "qux",
}
var buf bytes.Buffer
writer := NewWriter(&buf)
if err := writer.WriteHeader(hdr); err != nil {
t.Fatal(err)
}
if _, err = writer.Write([]byte(contents)); err != nil {
t.Fatal(err)
}
if err := writer.Close(); err != nil {
t.Fatal(err)
}
// Simple test to make sure PAX extensions are in effect
if !bytes.Contains(buf.Bytes(), []byte("PaxHeaders.0")) {
t.Fatal("Expected at least one PAX header to be written.")
}
// xattr bar should always appear before others
indices := []int{
bytes.Index(buf.Bytes(), []byte("bar=bar")),
bytes.Index(buf.Bytes(), []byte("baz=baz")),
bytes.Index(buf.Bytes(), []byte("foo=foo")),
bytes.Index(buf.Bytes(), []byte("qux=qux")),
}
if !sort.IntsAreSorted(indices) {
t.Fatal("PAX headers are not sorted")
}
}
func TestUSTARLongName(t *testing.T) {
// Create an archive with a path that failed to split with USTAR extension in previous versions.
fileinfo, err := os.Stat("testdata/small.txt")
if err != nil {
t.Fatal(err)
}
hdr, err := FileInfoHeader(fileinfo, "")
hdr.Typeflag = TypeDir
if err != nil {
t.Fatalf("os.Stat:1 %v", err)
}
// Force a PAX long name to be written. The name was taken from a practical example
// that fails and replaced ever char through numbers to anonymize the sample.
longName := "/0000_0000000/00000-000000000/0000_0000000/00000-0000000000000/0000_0000000/00000-0000000-00000000/0000_0000000/00000000/0000_0000000/000/0000_0000000/00000000v00/0000_0000000/000000/0000_0000000/0000000/0000_0000000/00000y-00/0000/0000/00000000/0x000000/"
hdr.Name = longName
hdr.Size = 0
var buf bytes.Buffer
writer := NewWriter(&buf)
if err := writer.WriteHeader(hdr); err != nil {
t.Fatal(err)
}
if err := writer.Close(); err != nil {
t.Fatal(err)
}
// Test that we can get a long name back out of the archive.
reader := NewReader(&buf)
hdr, err = reader.Next()
if err != nil {
t.Fatal(err)
}
if hdr.Name != longName {
t.Fatal("Couldn't recover long name")
}
}
func TestValidTypeflagWithPAXHeader(t *testing.T) {
var buffer bytes.Buffer
tw := NewWriter(&buffer)
fileName := strings.Repeat("ab", 100)
hdr := &Header{
Name: fileName,
Size: 4,
Typeflag: 0,
}
if err := tw.WriteHeader(hdr); err != nil {
t.Fatalf("Failed to write header: %s", err)
}
if _, err := tw.Write([]byte("fooo")); err != nil {
t.Fatalf("Failed to write the file's data: %s", err)
}
tw.Close()
tr := NewReader(&buffer)
for {
header, err := tr.Next()
if err == io.EOF {
break
}
if err != nil {
t.Fatalf("Failed to read header: %s", err)
}
if header.Typeflag != 0 {
t.Fatalf("Typeflag should've been 0, found %d", header.Typeflag)
}
}
}
func TestWriteAfterClose(t *testing.T) {
var buffer bytes.Buffer
tw := NewWriter(&buffer)
hdr := &Header{
Name: "small.txt",
Size: 5,
}
if err := tw.WriteHeader(hdr); err != nil {
t.Fatalf("Failed to write header: %s", err)
}
tw.Close()
if _, err := tw.Write([]byte("Kilts")); err != ErrWriteAfterClose {
t.Fatalf("Write: got %v; want ErrWriteAfterClose", err)
}
}
func TestSplitUSTARPath(t *testing.T) {
var sr = strings.Repeat
var vectors = []struct {
input string // Input path
prefix string // Expected output prefix
suffix string // Expected output suffix
ok bool // Split success?
}{
{"", "", "", false},
{"abc", "", "", false},
{"用戶名", "", "", false},
{sr("a", fileNameSize), "", "", false},
{sr("a", fileNameSize) + "/", "", "", false},
{sr("a", fileNameSize) + "/a", sr("a", fileNameSize), "a", true},
{sr("a", fileNamePrefixSize) + "/", "", "", false},
{sr("a", fileNamePrefixSize) + "/a", sr("a", fileNamePrefixSize), "a", true},
{sr("a", fileNameSize+1), "", "", false},
{sr("/", fileNameSize+1), sr("/", fileNameSize-1), "/", true},
{sr("a", fileNamePrefixSize) + "/" + sr("b", fileNameSize),
sr("a", fileNamePrefixSize), sr("b", fileNameSize), true},
{sr("a", fileNamePrefixSize) + "//" + sr("b", fileNameSize), "", "", false},
{sr("a/", fileNameSize), sr("a/", 77) + "a", sr("a/", 22), true},
}
for _, v := range vectors {
prefix, suffix, ok := splitUSTARPath(v.input)
if prefix != v.prefix || suffix != v.suffix || ok != v.ok {
t.Errorf("splitUSTARPath(%q):\ngot (%q, %q, %v)\nwant (%q, %q, %v)",
v.input, prefix, suffix, ok, v.prefix, v.suffix, v.ok)
}
}
}
func TestFormatPAXRecord(t *testing.T) {
var medName = strings.Repeat("CD", 50)
var longName = strings.Repeat("AB", 100)
var vectors = []struct {
inputKey string
inputVal string
output string
}{
{"k", "v", "6 k=v\n"},
{"path", "/etc/hosts", "19 path=/etc/hosts\n"},
{"path", longName, "210 path=" + longName + "\n"},
{"path", medName, "110 path=" + medName + "\n"},
{"foo", "ba", "9 foo=ba\n"},
{"foo", "bar", "11 foo=bar\n"},
{"foo", "b=\nar=\n==\x00", "18 foo=b=\nar=\n==\x00\n"},
{"foo", "hello9 foo=ba\nworld", "27 foo=hello9 foo=ba\nworld\n"},
{"☺☻☹", "日a本b語ç", "27 ☺☻☹=日a本b語ç\n"},
{"\x00hello", "\x00world", "17 \x00hello=\x00world\n"},
}
for _, v := range vectors {
output := formatPAXRecord(v.inputKey, v.inputVal)
if output != v.output {
t.Errorf("formatPAXRecord(%q, %q): got %q, want %q",
v.inputKey, v.inputVal, output, v.output)
}
}
}
func TestFitsInBase256(t *testing.T) {
var vectors = []struct {
input int64
width int
ok bool
}{
{+1, 8, true},
{0, 8, true},
{-1, 8, true},
{1 << 56, 8, false},
{(1 << 56) - 1, 8, true},
{-1 << 56, 8, true},
{(-1 << 56) - 1, 8, false},
{121654, 8, true},
{-9849849, 8, true},
{math.MaxInt64, 9, true},
{0, 9, true},
{math.MinInt64, 9, true},
{math.MaxInt64, 12, true},
{0, 12, true},
{math.MinInt64, 12, true},
}
for _, v := range vectors {
ok := fitsInBase256(v.width, v.input)
if ok != v.ok {
t.Errorf("checkNumeric(%d, %d): got %v, want %v", v.input, v.width, ok, v.ok)
}
}
}
func TestFormatNumeric(t *testing.T) {
var vectors = []struct {
input int64
output string
ok bool
}{
// Test base-256 (binary) encoded values.
{-1, "\xff", true},
{-1, "\xff\xff", true},
{-1, "\xff\xff\xff", true},
{(1 << 0), "0", false},
{(1 << 8) - 1, "\x80\xff", true},
{(1 << 8), "0\x00", false},
{(1 << 16) - 1, "\x80\xff\xff", true},
{(1 << 16), "00\x00", false},
{-1 * (1 << 0), "\xff", true},
{-1*(1<<0) - 1, "0", false},
{-1 * (1 << 8), "\xff\x00", true},
{-1*(1<<8) - 1, "0\x00", false},
{-1 * (1 << 16), "\xff\x00\x00", true},
{-1*(1<<16) - 1, "00\x00", false},
{537795476381659745, "0000000\x00", false},
{537795476381659745, "\x80\x00\x00\x00\x07\x76\xa2\x22\xeb\x8a\x72\x61", true},
{-615126028225187231, "0000000\x00", false},
{-615126028225187231, "\xff\xff\xff\xff\xf7\x76\xa2\x22\xeb\x8a\x72\x61", true},
{math.MaxInt64, "0000000\x00", false},
{math.MaxInt64, "\x80\x00\x00\x00\x7f\xff\xff\xff\xff\xff\xff\xff", true},
{math.MinInt64, "0000000\x00", false},
{math.MinInt64, "\xff\xff\xff\xff\x80\x00\x00\x00\x00\x00\x00\x00", true},
{math.MaxInt64, "\x80\x7f\xff\xff\xff\xff\xff\xff\xff", true},
{math.MinInt64, "\xff\x80\x00\x00\x00\x00\x00\x00\x00", true},
}
for _, v := range vectors {
var f formatter
output := make([]byte, len(v.output))
f.formatNumeric(output, v.input)
ok := (f.err == nil)
if ok != v.ok {
if v.ok {
t.Errorf("formatNumeric(%d): got formatting failure, want success", v.input)
} else {
t.Errorf("formatNumeric(%d): got formatting success, want failure", v.input)
}
}
if string(output) != v.output {
t.Errorf("formatNumeric(%d): got %q, want %q", v.input, output, v.output)
}
}
}
func TestFormatPAXTime(t *testing.T) {
t1 := time.Date(2000, 1, 1, 11, 0, 0, 0, time.UTC)
t2 := time.Date(2000, 1, 1, 11, 0, 0, 100, time.UTC)
t3 := time.Date(1960, 1, 1, 11, 0, 0, 0, time.UTC)
t4 := time.Date(1970, 1, 1, 0, 0, 0, 0, time.UTC)
verify := func(time time.Time, s string) {
p := formatPAXTime(time)
if p != s {
t.Errorf("for %v, expected %s, got %s", time, s, p)
}
}
verify(t1, "946724400")
verify(t2, "946724400.000000100")
verify(t3, "-315579600")
verify(t4, "0")
}

280
vendor/github.com/Microsoft/go-winio/backup.go generated vendored Normal file
View file

@ -0,0 +1,280 @@
// +build windows
package winio
import (
"encoding/binary"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"runtime"
"syscall"
"unicode/utf16"
)
//sys backupRead(h syscall.Handle, b []byte, bytesRead *uint32, abort bool, processSecurity bool, context *uintptr) (err error) = BackupRead
//sys backupWrite(h syscall.Handle, b []byte, bytesWritten *uint32, abort bool, processSecurity bool, context *uintptr) (err error) = BackupWrite
const (
BackupData = uint32(iota + 1)
BackupEaData
BackupSecurity
BackupAlternateData
BackupLink
BackupPropertyData
BackupObjectId
BackupReparseData
BackupSparseBlock
BackupTxfsData
)
const (
StreamSparseAttributes = uint32(8)
)
const (
WRITE_DAC = 0x40000
WRITE_OWNER = 0x80000
ACCESS_SYSTEM_SECURITY = 0x1000000
)
// BackupHeader represents a backup stream of a file.
type BackupHeader struct {
Id uint32 // The backup stream ID
Attributes uint32 // Stream attributes
Size int64 // The size of the stream in bytes
Name string // The name of the stream (for BackupAlternateData only).
Offset int64 // The offset of the stream in the file (for BackupSparseBlock only).
}
type win32StreamId struct {
StreamId uint32
Attributes uint32
Size uint64
NameSize uint32
}
// BackupStreamReader reads from a stream produced by the BackupRead Win32 API and produces a series
// of BackupHeader values.
type BackupStreamReader struct {
r io.Reader
bytesLeft int64
}
// NewBackupStreamReader produces a BackupStreamReader from any io.Reader.
func NewBackupStreamReader(r io.Reader) *BackupStreamReader {
return &BackupStreamReader{r, 0}
}
// Next returns the next backup stream and prepares for calls to Read(). It skips the remainder of the current stream if
// it was not completely read.
func (r *BackupStreamReader) Next() (*BackupHeader, error) {
if r.bytesLeft > 0 {
if s, ok := r.r.(io.Seeker); ok {
// Make sure Seek on io.SeekCurrent sometimes succeeds
// before trying the actual seek.
if _, err := s.Seek(0, io.SeekCurrent); err == nil {
if _, err = s.Seek(r.bytesLeft, io.SeekCurrent); err != nil {
return nil, err
}
r.bytesLeft = 0
}
}
if _, err := io.Copy(ioutil.Discard, r); err != nil {
return nil, err
}
}
var wsi win32StreamId
if err := binary.Read(r.r, binary.LittleEndian, &wsi); err != nil {
return nil, err
}
hdr := &BackupHeader{
Id: wsi.StreamId,
Attributes: wsi.Attributes,
Size: int64(wsi.Size),
}
if wsi.NameSize != 0 {
name := make([]uint16, int(wsi.NameSize/2))
if err := binary.Read(r.r, binary.LittleEndian, name); err != nil {
return nil, err
}
hdr.Name = syscall.UTF16ToString(name)
}
if wsi.StreamId == BackupSparseBlock {
if err := binary.Read(r.r, binary.LittleEndian, &hdr.Offset); err != nil {
return nil, err
}
hdr.Size -= 8
}
r.bytesLeft = hdr.Size
return hdr, nil
}
// Read reads from the current backup stream.
func (r *BackupStreamReader) Read(b []byte) (int, error) {
if r.bytesLeft == 0 {
return 0, io.EOF
}
if int64(len(b)) > r.bytesLeft {
b = b[:r.bytesLeft]
}
n, err := r.r.Read(b)
r.bytesLeft -= int64(n)
if err == io.EOF {
err = io.ErrUnexpectedEOF
} else if r.bytesLeft == 0 && err == nil {
err = io.EOF
}
return n, err
}
// BackupStreamWriter writes a stream compatible with the BackupWrite Win32 API.
type BackupStreamWriter struct {
w io.Writer
bytesLeft int64
}
// NewBackupStreamWriter produces a BackupStreamWriter on top of an io.Writer.
func NewBackupStreamWriter(w io.Writer) *BackupStreamWriter {
return &BackupStreamWriter{w, 0}
}
// WriteHeader writes the next backup stream header and prepares for calls to Write().
func (w *BackupStreamWriter) WriteHeader(hdr *BackupHeader) error {
if w.bytesLeft != 0 {
return fmt.Errorf("missing %d bytes", w.bytesLeft)
}
name := utf16.Encode([]rune(hdr.Name))
wsi := win32StreamId{
StreamId: hdr.Id,
Attributes: hdr.Attributes,
Size: uint64(hdr.Size),
NameSize: uint32(len(name) * 2),
}
if hdr.Id == BackupSparseBlock {
// Include space for the int64 block offset
wsi.Size += 8
}
if err := binary.Write(w.w, binary.LittleEndian, &wsi); err != nil {
return err
}
if len(name) != 0 {
if err := binary.Write(w.w, binary.LittleEndian, name); err != nil {
return err
}
}
if hdr.Id == BackupSparseBlock {
if err := binary.Write(w.w, binary.LittleEndian, hdr.Offset); err != nil {
return err
}
}
w.bytesLeft = hdr.Size
return nil
}
// Write writes to the current backup stream.
func (w *BackupStreamWriter) Write(b []byte) (int, error) {
if w.bytesLeft < int64(len(b)) {
return 0, fmt.Errorf("too many bytes by %d", int64(len(b))-w.bytesLeft)
}
n, err := w.w.Write(b)
w.bytesLeft -= int64(n)
return n, err
}
// BackupFileReader provides an io.ReadCloser interface on top of the BackupRead Win32 API.
type BackupFileReader struct {
f *os.File
includeSecurity bool
ctx uintptr
}
// NewBackupFileReader returns a new BackupFileReader from a file handle. If includeSecurity is true,
// Read will attempt to read the security descriptor of the file.
func NewBackupFileReader(f *os.File, includeSecurity bool) *BackupFileReader {
r := &BackupFileReader{f, includeSecurity, 0}
return r
}
// Read reads a backup stream from the file by calling the Win32 API BackupRead().
func (r *BackupFileReader) Read(b []byte) (int, error) {
var bytesRead uint32
err := backupRead(syscall.Handle(r.f.Fd()), b, &bytesRead, false, r.includeSecurity, &r.ctx)
if err != nil {
return 0, &os.PathError{"BackupRead", r.f.Name(), err}
}
runtime.KeepAlive(r.f)
if bytesRead == 0 {
return 0, io.EOF
}
return int(bytesRead), nil
}
// Close frees Win32 resources associated with the BackupFileReader. It does not close
// the underlying file.
func (r *BackupFileReader) Close() error {
if r.ctx != 0 {
backupRead(syscall.Handle(r.f.Fd()), nil, nil, true, false, &r.ctx)
runtime.KeepAlive(r.f)
r.ctx = 0
}
return nil
}
// BackupFileWriter provides an io.WriteCloser interface on top of the BackupWrite Win32 API.
type BackupFileWriter struct {
f *os.File
includeSecurity bool
ctx uintptr
}
// NewBackupFileWriter returns a new BackupFileWriter from a file handle. If includeSecurity is true,
// Write() will attempt to restore the security descriptor from the stream.
func NewBackupFileWriter(f *os.File, includeSecurity bool) *BackupFileWriter {
w := &BackupFileWriter{f, includeSecurity, 0}
return w
}
// Write restores a portion of the file using the provided backup stream.
func (w *BackupFileWriter) Write(b []byte) (int, error) {
var bytesWritten uint32
err := backupWrite(syscall.Handle(w.f.Fd()), b, &bytesWritten, false, w.includeSecurity, &w.ctx)
if err != nil {
return 0, &os.PathError{"BackupWrite", w.f.Name(), err}
}
runtime.KeepAlive(w.f)
if int(bytesWritten) != len(b) {
return int(bytesWritten), errors.New("not all bytes could be written")
}
return len(b), nil
}
// Close frees Win32 resources associated with the BackupFileWriter. It does not
// close the underlying file.
func (w *BackupFileWriter) Close() error {
if w.ctx != 0 {
backupWrite(syscall.Handle(w.f.Fd()), nil, nil, true, false, &w.ctx)
runtime.KeepAlive(w.f)
w.ctx = 0
}
return nil
}
// OpenForBackup opens a file or directory, potentially skipping access checks if the backup
// or restore privileges have been acquired.
//
// If the file opened was a directory, it cannot be used with Readdir().
func OpenForBackup(path string, access uint32, share uint32, createmode uint32) (*os.File, error) {
winPath, err := syscall.UTF16FromString(path)
if err != nil {
return nil, err
}
h, err := syscall.CreateFile(&winPath[0], access, share, nil, createmode, syscall.FILE_FLAG_BACKUP_SEMANTICS|syscall.FILE_FLAG_OPEN_REPARSE_POINT, 0)
if err != nil {
err = &os.PathError{Op: "open", Path: path, Err: err}
return nil, err
}
return os.NewFile(uintptr(h), path), nil
}

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vendor/github.com/Microsoft/go-winio/backup_test.go generated vendored Normal file
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package winio
import (
"io"
"io/ioutil"
"os"
"syscall"
"testing"
)
var testFileName string
func TestMain(m *testing.M) {
f, err := ioutil.TempFile("", "tmp")
if err != nil {
panic(err)
}
testFileName = f.Name()
f.Close()
defer os.Remove(testFileName)
os.Exit(m.Run())
}
func makeTestFile(makeADS bool) error {
os.Remove(testFileName)
f, err := os.Create(testFileName)
if err != nil {
return err
}
defer f.Close()
_, err = f.Write([]byte("testing 1 2 3\n"))
if err != nil {
return err
}
if makeADS {
a, err := os.Create(testFileName + ":ads.txt")
if err != nil {
return err
}
defer a.Close()
_, err = a.Write([]byte("alternate data stream\n"))
if err != nil {
return err
}
}
return nil
}
func TestBackupRead(t *testing.T) {
err := makeTestFile(true)
if err != nil {
t.Fatal(err)
}
f, err := os.Open(testFileName)
if err != nil {
t.Fatal(err)
}
defer f.Close()
r := NewBackupFileReader(f, false)
defer r.Close()
b, err := ioutil.ReadAll(r)
if err != nil {
t.Fatal(err)
}
if len(b) == 0 {
t.Fatal("no data")
}
}
func TestBackupStreamRead(t *testing.T) {
err := makeTestFile(true)
if err != nil {
t.Fatal(err)
}
f, err := os.Open(testFileName)
if err != nil {
t.Fatal(err)
}
defer f.Close()
r := NewBackupFileReader(f, false)
defer r.Close()
br := NewBackupStreamReader(r)
gotData := false
gotAltData := false
for {
hdr, err := br.Next()
if err == io.EOF {
break
}
if err != nil {
t.Fatal(err)
}
switch hdr.Id {
case BackupData:
if gotData {
t.Fatal("duplicate data")
}
if hdr.Name != "" {
t.Fatalf("unexpected name %s", hdr.Name)
}
b, err := ioutil.ReadAll(br)
if err != nil {
t.Fatal(err)
}
if string(b) != "testing 1 2 3\n" {
t.Fatalf("incorrect data %v", b)
}
gotData = true
case BackupAlternateData:
if gotAltData {
t.Fatal("duplicate alt data")
}
if hdr.Name != ":ads.txt:$DATA" {
t.Fatalf("incorrect name %s", hdr.Name)
}
b, err := ioutil.ReadAll(br)
if err != nil {
t.Fatal(err)
}
if string(b) != "alternate data stream\n" {
t.Fatalf("incorrect data %v", b)
}
gotAltData = true
default:
t.Fatalf("unknown stream ID %d", hdr.Id)
}
}
if !gotData || !gotAltData {
t.Fatal("missing stream")
}
}
func TestBackupStreamWrite(t *testing.T) {
f, err := os.Create(testFileName)
if err != nil {
t.Fatal(err)
}
defer f.Close()
w := NewBackupFileWriter(f, false)
defer w.Close()
data := "testing 1 2 3\n"
altData := "alternate stream\n"
br := NewBackupStreamWriter(w)
err = br.WriteHeader(&BackupHeader{Id: BackupData, Size: int64(len(data))})
if err != nil {
t.Fatal(err)
}
n, err := br.Write([]byte(data))
if err != nil {
t.Fatal(err)
}
if n != len(data) {
t.Fatal("short write")
}
err = br.WriteHeader(&BackupHeader{Id: BackupAlternateData, Size: int64(len(altData)), Name: ":ads.txt:$DATA"})
if err != nil {
t.Fatal(err)
}
n, err = br.Write([]byte(altData))
if err != nil {
t.Fatal(err)
}
if n != len(altData) {
t.Fatal("short write")
}
f.Close()
b, err := ioutil.ReadFile(testFileName)
if err != nil {
t.Fatal(err)
}
if string(b) != data {
t.Fatalf("wrong data %v", b)
}
b, err = ioutil.ReadFile(testFileName + ":ads.txt")
if err != nil {
t.Fatal(err)
}
if string(b) != altData {
t.Fatalf("wrong data %v", b)
}
}
func makeSparseFile() error {
os.Remove(testFileName)
f, err := os.Create(testFileName)
if err != nil {
return err
}
defer f.Close()
const (
FSCTL_SET_SPARSE = 0x000900c4
FSCTL_SET_ZERO_DATA = 0x000980c8
)
err = syscall.DeviceIoControl(syscall.Handle(f.Fd()), FSCTL_SET_SPARSE, nil, 0, nil, 0, nil, nil)
if err != nil {
return err
}
_, err = f.Write([]byte("testing 1 2 3\n"))
if err != nil {
return err
}
_, err = f.Seek(1000000, 0)
if err != nil {
return err
}
_, err = f.Write([]byte("more data later\n"))
if err != nil {
return err
}
return nil
}
func TestBackupSparseFile(t *testing.T) {
err := makeSparseFile()
if err != nil {
t.Fatal(err)
}
f, err := os.Open(testFileName)
if err != nil {
t.Fatal(err)
}
defer f.Close()
r := NewBackupFileReader(f, false)
defer r.Close()
br := NewBackupStreamReader(r)
for {
hdr, err := br.Next()
if err == io.EOF {
break
}
if err != nil {
t.Fatal(err)
}
t.Log(hdr)
}
}

4
vendor/github.com/Microsoft/go-winio/backuptar/noop.go generated vendored Normal file
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// +build !windows
// This file only exists to allow go get on non-Windows platforms.
package backuptar

439
vendor/github.com/Microsoft/go-winio/backuptar/tar.go generated vendored Normal file
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// +build windows
package backuptar
import (
"encoding/base64"
"errors"
"fmt"
"io"
"io/ioutil"
"path/filepath"
"strconv"
"strings"
"syscall"
"time"
"github.com/Microsoft/go-winio"
"github.com/Microsoft/go-winio/archive/tar" // until archive/tar supports pax extensions in its interface
)
const (
c_ISUID = 04000 // Set uid
c_ISGID = 02000 // Set gid
c_ISVTX = 01000 // Save text (sticky bit)
c_ISDIR = 040000 // Directory
c_ISFIFO = 010000 // FIFO
c_ISREG = 0100000 // Regular file
c_ISLNK = 0120000 // Symbolic link
c_ISBLK = 060000 // Block special file
c_ISCHR = 020000 // Character special file
c_ISSOCK = 0140000 // Socket
)
const (
hdrFileAttributes = "fileattr"
hdrSecurityDescriptor = "sd"
hdrRawSecurityDescriptor = "rawsd"
hdrMountPoint = "mountpoint"
hdrEaPrefix = "xattr."
)
func writeZeroes(w io.Writer, count int64) error {
buf := make([]byte, 8192)
c := len(buf)
for i := int64(0); i < count; i += int64(c) {
if int64(c) > count-i {
c = int(count - i)
}
_, err := w.Write(buf[:c])
if err != nil {
return err
}
}
return nil
}
func copySparse(t *tar.Writer, br *winio.BackupStreamReader) error {
curOffset := int64(0)
for {
bhdr, err := br.Next()
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
if err != nil {
return err
}
if bhdr.Id != winio.BackupSparseBlock {
return fmt.Errorf("unexpected stream %d", bhdr.Id)
}
// archive/tar does not support writing sparse files
// so just write zeroes to catch up to the current offset.
err = writeZeroes(t, bhdr.Offset-curOffset)
if bhdr.Size == 0 {
break
}
n, err := io.Copy(t, br)
if err != nil {
return err
}
curOffset = bhdr.Offset + n
}
return nil
}
// BasicInfoHeader creates a tar header from basic file information.
func BasicInfoHeader(name string, size int64, fileInfo *winio.FileBasicInfo) *tar.Header {
hdr := &tar.Header{
Name: filepath.ToSlash(name),
Size: size,
Typeflag: tar.TypeReg,
ModTime: time.Unix(0, fileInfo.LastWriteTime.Nanoseconds()),
ChangeTime: time.Unix(0, fileInfo.ChangeTime.Nanoseconds()),
AccessTime: time.Unix(0, fileInfo.LastAccessTime.Nanoseconds()),
CreationTime: time.Unix(0, fileInfo.CreationTime.Nanoseconds()),
Winheaders: make(map[string]string),
}
hdr.Winheaders[hdrFileAttributes] = fmt.Sprintf("%d", fileInfo.FileAttributes)
if (fileInfo.FileAttributes & syscall.FILE_ATTRIBUTE_DIRECTORY) != 0 {
hdr.Mode |= c_ISDIR
hdr.Size = 0
hdr.Typeflag = tar.TypeDir
}
return hdr
}
// WriteTarFileFromBackupStream writes a file to a tar writer using data from a Win32 backup stream.
//
// This encodes Win32 metadata as tar pax vendor extensions starting with MSWINDOWS.
//
// The additional Win32 metadata is:
//
// MSWINDOWS.fileattr: The Win32 file attributes, as a decimal value
//
// MSWINDOWS.rawsd: The Win32 security descriptor, in raw binary format
//
// MSWINDOWS.mountpoint: If present, this is a mount point and not a symlink, even though the type is '2' (symlink)
func WriteTarFileFromBackupStream(t *tar.Writer, r io.Reader, name string, size int64, fileInfo *winio.FileBasicInfo) error {
name = filepath.ToSlash(name)
hdr := BasicInfoHeader(name, size, fileInfo)
// If r can be seeked, then this function is two-pass: pass 1 collects the
// tar header data, and pass 2 copies the data stream. If r cannot be
// seeked, then some header data (in particular EAs) will be silently lost.
var (
restartPos int64
err error
)
sr, readTwice := r.(io.Seeker)
if readTwice {
if restartPos, err = sr.Seek(0, io.SeekCurrent); err != nil {
readTwice = false
}
}
br := winio.NewBackupStreamReader(r)
var dataHdr *winio.BackupHeader
for dataHdr == nil {
bhdr, err := br.Next()
if err == io.EOF {
break
}
if err != nil {
return err
}
switch bhdr.Id {
case winio.BackupData:
hdr.Mode |= c_ISREG
if !readTwice {
dataHdr = bhdr
}
case winio.BackupSecurity:
sd, err := ioutil.ReadAll(br)
if err != nil {
return err
}
hdr.Winheaders[hdrRawSecurityDescriptor] = base64.StdEncoding.EncodeToString(sd)
case winio.BackupReparseData:
hdr.Mode |= c_ISLNK
hdr.Typeflag = tar.TypeSymlink
reparseBuffer, err := ioutil.ReadAll(br)
rp, err := winio.DecodeReparsePoint(reparseBuffer)
if err != nil {
return err
}
if rp.IsMountPoint {
hdr.Winheaders[hdrMountPoint] = "1"
}
hdr.Linkname = rp.Target
case winio.BackupEaData:
eab, err := ioutil.ReadAll(br)
if err != nil {
return err
}
eas, err := winio.DecodeExtendedAttributes(eab)
if err != nil {
return err
}
for _, ea := range eas {
// Use base64 encoding for the binary value. Note that there
// is no way to encode the EA's flags, since their use doesn't
// make any sense for persisted EAs.
hdr.Winheaders[hdrEaPrefix+ea.Name] = base64.StdEncoding.EncodeToString(ea.Value)
}
case winio.BackupAlternateData, winio.BackupLink, winio.BackupPropertyData, winio.BackupObjectId, winio.BackupTxfsData:
// ignore these streams
default:
return fmt.Errorf("%s: unknown stream ID %d", name, bhdr.Id)
}
}
err = t.WriteHeader(hdr)
if err != nil {
return err
}
if readTwice {
// Get back to the data stream.
if _, err = sr.Seek(restartPos, io.SeekStart); err != nil {
return err
}
for dataHdr == nil {
bhdr, err := br.Next()
if err == io.EOF {
break
}
if err != nil {
return err
}
if bhdr.Id == winio.BackupData {
dataHdr = bhdr
}
}
}
if dataHdr != nil {
// A data stream was found. Copy the data.
if (dataHdr.Attributes & winio.StreamSparseAttributes) == 0 {
if size != dataHdr.Size {
return fmt.Errorf("%s: mismatch between file size %d and header size %d", name, size, dataHdr.Size)
}
_, err = io.Copy(t, br)
if err != nil {
return err
}
} else {
err = copySparse(t, br)
if err != nil {
return err
}
}
}
// Look for streams after the data stream. The only ones we handle are alternate data streams.
// Other streams may have metadata that could be serialized, but the tar header has already
// been written. In practice, this means that we don't get EA or TXF metadata.
for {
bhdr, err := br.Next()
if err == io.EOF {
break
}
if err != nil {
return err
}
switch bhdr.Id {
case winio.BackupAlternateData:
altName := bhdr.Name
if strings.HasSuffix(altName, ":$DATA") {
altName = altName[:len(altName)-len(":$DATA")]
}
if (bhdr.Attributes & winio.StreamSparseAttributes) == 0 {
hdr = &tar.Header{
Name: name + altName,
Mode: hdr.Mode,
Typeflag: tar.TypeReg,
Size: bhdr.Size,
ModTime: hdr.ModTime,
AccessTime: hdr.AccessTime,
ChangeTime: hdr.ChangeTime,
}
err = t.WriteHeader(hdr)
if err != nil {
return err
}
_, err = io.Copy(t, br)
if err != nil {
return err
}
} else {
// Unsupported for now, since the size of the alternate stream is not present
// in the backup stream until after the data has been read.
return errors.New("tar of sparse alternate data streams is unsupported")
}
case winio.BackupEaData, winio.BackupLink, winio.BackupPropertyData, winio.BackupObjectId, winio.BackupTxfsData:
// ignore these streams
default:
return fmt.Errorf("%s: unknown stream ID %d after data", name, bhdr.Id)
}
}
return nil
}
// FileInfoFromHeader retrieves basic Win32 file information from a tar header, using the additional metadata written by
// WriteTarFileFromBackupStream.
func FileInfoFromHeader(hdr *tar.Header) (name string, size int64, fileInfo *winio.FileBasicInfo, err error) {
name = hdr.Name
if hdr.Typeflag == tar.TypeReg || hdr.Typeflag == tar.TypeRegA {
size = hdr.Size
}
fileInfo = &winio.FileBasicInfo{
LastAccessTime: syscall.NsecToFiletime(hdr.AccessTime.UnixNano()),
LastWriteTime: syscall.NsecToFiletime(hdr.ModTime.UnixNano()),
ChangeTime: syscall.NsecToFiletime(hdr.ChangeTime.UnixNano()),
CreationTime: syscall.NsecToFiletime(hdr.CreationTime.UnixNano()),
}
if attrStr, ok := hdr.Winheaders[hdrFileAttributes]; ok {
attr, err := strconv.ParseUint(attrStr, 10, 32)
if err != nil {
return "", 0, nil, err
}
fileInfo.FileAttributes = uintptr(attr)
} else {
if hdr.Typeflag == tar.TypeDir {
fileInfo.FileAttributes |= syscall.FILE_ATTRIBUTE_DIRECTORY
}
}
return
}
// WriteBackupStreamFromTarFile writes a Win32 backup stream from the current tar file. Since this function may process multiple
// tar file entries in order to collect all the alternate data streams for the file, it returns the next
// tar file that was not processed, or io.EOF is there are no more.
func WriteBackupStreamFromTarFile(w io.Writer, t *tar.Reader, hdr *tar.Header) (*tar.Header, error) {
bw := winio.NewBackupStreamWriter(w)
var sd []byte
var err error
// Maintaining old SDDL-based behavior for backward compatibility. All new tar headers written
// by this library will have raw binary for the security descriptor.
if sddl, ok := hdr.Winheaders[hdrSecurityDescriptor]; ok {
sd, err = winio.SddlToSecurityDescriptor(sddl)
if err != nil {
return nil, err
}
}
if sdraw, ok := hdr.Winheaders[hdrRawSecurityDescriptor]; ok {
sd, err = base64.StdEncoding.DecodeString(sdraw)
if err != nil {
return nil, err
}
}
if len(sd) != 0 {
bhdr := winio.BackupHeader{
Id: winio.BackupSecurity,
Size: int64(len(sd)),
}
err := bw.WriteHeader(&bhdr)
if err != nil {
return nil, err
}
_, err = bw.Write(sd)
if err != nil {
return nil, err
}
}
var eas []winio.ExtendedAttribute
for k, v := range hdr.Winheaders {
if !strings.HasPrefix(k, hdrEaPrefix) {
continue
}
data, err := base64.StdEncoding.DecodeString(v)
if err != nil {
return nil, err
}
eas = append(eas, winio.ExtendedAttribute{
Name: k[len(hdrEaPrefix):],
Value: data,
})
}
if len(eas) != 0 {
eadata, err := winio.EncodeExtendedAttributes(eas)
if err != nil {
return nil, err
}
bhdr := winio.BackupHeader{
Id: winio.BackupEaData,
Size: int64(len(eadata)),
}
err = bw.WriteHeader(&bhdr)
if err != nil {
return nil, err
}
_, err = bw.Write(eadata)
if err != nil {
return nil, err
}
}
if hdr.Typeflag == tar.TypeSymlink {
_, isMountPoint := hdr.Winheaders[hdrMountPoint]
rp := winio.ReparsePoint{
Target: filepath.FromSlash(hdr.Linkname),
IsMountPoint: isMountPoint,
}
reparse := winio.EncodeReparsePoint(&rp)
bhdr := winio.BackupHeader{
Id: winio.BackupReparseData,
Size: int64(len(reparse)),
}
err := bw.WriteHeader(&bhdr)
if err != nil {
return nil, err
}
_, err = bw.Write(reparse)
if err != nil {
return nil, err
}
}
if hdr.Typeflag == tar.TypeReg || hdr.Typeflag == tar.TypeRegA {
bhdr := winio.BackupHeader{
Id: winio.BackupData,
Size: hdr.Size,
}
err := bw.WriteHeader(&bhdr)
if err != nil {
return nil, err
}
_, err = io.Copy(bw, t)
if err != nil {
return nil, err
}
}
// Copy all the alternate data streams and return the next non-ADS header.
for {
ahdr, err := t.Next()
if err != nil {
return nil, err
}
if ahdr.Typeflag != tar.TypeReg || !strings.HasPrefix(ahdr.Name, hdr.Name+":") {
return ahdr, nil
}
bhdr := winio.BackupHeader{
Id: winio.BackupAlternateData,
Size: ahdr.Size,
Name: ahdr.Name[len(hdr.Name):] + ":$DATA",
}
err = bw.WriteHeader(&bhdr)
if err != nil {
return nil, err
}
_, err = io.Copy(bw, t)
if err != nil {
return nil, err
}
}
}

84
vendor/github.com/Microsoft/go-winio/backuptar/tar_test.go generated vendored Normal file
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@ -0,0 +1,84 @@
package backuptar
import (
"bytes"
"io/ioutil"
"os"
"path/filepath"
"reflect"
"testing"
"github.com/Microsoft/go-winio"
"github.com/Microsoft/go-winio/archive/tar"
)
func ensurePresent(t *testing.T, m map[string]string, keys ...string) {
for _, k := range keys {
if _, ok := m[k]; !ok {
t.Error(k, "not present in tar header")
}
}
}
func TestRoundTrip(t *testing.T) {
f, err := ioutil.TempFile("", "tst")
if err != nil {
t.Fatal(err)
}
defer f.Close()
defer os.Remove(f.Name())
if _, err = f.Write([]byte("testing 1 2 3\n")); err != nil {
t.Fatal(err)
}
if _, err = f.Seek(0, 0); err != nil {
t.Fatal(err)
}
fi, err := f.Stat()
if err != nil {
t.Fatal(err)
}
bi, err := winio.GetFileBasicInfo(f)
if err != nil {
t.Fatal(err)
}
br := winio.NewBackupFileReader(f, true)
defer br.Close()
var buf bytes.Buffer
tw := tar.NewWriter(&buf)
err = WriteTarFileFromBackupStream(tw, br, f.Name(), fi.Size(), bi)
if err != nil {
t.Fatal(err)
}
tr := tar.NewReader(&buf)
hdr, err := tr.Next()
if err != nil {
t.Fatal(err)
}
name, size, bi2, err := FileInfoFromHeader(hdr)
if err != nil {
t.Fatal(err)
}
if name != filepath.ToSlash(f.Name()) {
t.Errorf("got name %s, expected %s", name, filepath.ToSlash(f.Name()))
}
if size != fi.Size() {
t.Errorf("got size %d, expected %d", size, fi.Size())
}
if !reflect.DeepEqual(*bi, *bi2) {
t.Errorf("got %#v, expected %#v", *bi, *bi2)
}
ensurePresent(t, hdr.Winheaders, "fileattr", "rawsd")
}

137
vendor/github.com/Microsoft/go-winio/ea.go generated vendored Normal file
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@ -0,0 +1,137 @@
package winio
import (
"bytes"
"encoding/binary"
"errors"
)
type fileFullEaInformation struct {
NextEntryOffset uint32
Flags uint8
NameLength uint8
ValueLength uint16
}
var (
fileFullEaInformationSize = binary.Size(&fileFullEaInformation{})
errInvalidEaBuffer = errors.New("invalid extended attribute buffer")
errEaNameTooLarge = errors.New("extended attribute name too large")
errEaValueTooLarge = errors.New("extended attribute value too large")
)
// ExtendedAttribute represents a single Windows EA.
type ExtendedAttribute struct {
Name string
Value []byte
Flags uint8
}
func parseEa(b []byte) (ea ExtendedAttribute, nb []byte, err error) {
var info fileFullEaInformation
err = binary.Read(bytes.NewReader(b), binary.LittleEndian, &info)
if err != nil {
err = errInvalidEaBuffer
return
}
nameOffset := fileFullEaInformationSize
nameLen := int(info.NameLength)
valueOffset := nameOffset + int(info.NameLength) + 1
valueLen := int(info.ValueLength)
nextOffset := int(info.NextEntryOffset)
if valueLen+valueOffset > len(b) || nextOffset < 0 || nextOffset > len(b) {
err = errInvalidEaBuffer
return
}
ea.Name = string(b[nameOffset : nameOffset+nameLen])
ea.Value = b[valueOffset : valueOffset+valueLen]
ea.Flags = info.Flags
if info.NextEntryOffset != 0 {
nb = b[info.NextEntryOffset:]
}
return
}
// DecodeExtendedAttributes decodes a list of EAs from a FILE_FULL_EA_INFORMATION
// buffer retrieved from BackupRead, ZwQueryEaFile, etc.
func DecodeExtendedAttributes(b []byte) (eas []ExtendedAttribute, err error) {
for len(b) != 0 {
ea, nb, err := parseEa(b)
if err != nil {
return nil, err
}
eas = append(eas, ea)
b = nb
}
return
}
func writeEa(buf *bytes.Buffer, ea *ExtendedAttribute, last bool) error {
if int(uint8(len(ea.Name))) != len(ea.Name) {
return errEaNameTooLarge
}
if int(uint16(len(ea.Value))) != len(ea.Value) {
return errEaValueTooLarge
}
entrySize := uint32(fileFullEaInformationSize + len(ea.Name) + 1 + len(ea.Value))
withPadding := (entrySize + 3) &^ 3
nextOffset := uint32(0)
if !last {
nextOffset = withPadding
}
info := fileFullEaInformation{
NextEntryOffset: nextOffset,
Flags: ea.Flags,
NameLength: uint8(len(ea.Name)),
ValueLength: uint16(len(ea.Value)),
}
err := binary.Write(buf, binary.LittleEndian, &info)
if err != nil {
return err
}
_, err = buf.Write([]byte(ea.Name))
if err != nil {
return err
}
err = buf.WriteByte(0)
if err != nil {
return err
}
_, err = buf.Write(ea.Value)
if err != nil {
return err
}
_, err = buf.Write([]byte{0, 0, 0}[0 : withPadding-entrySize])
if err != nil {
return err
}
return nil
}
// EncodeExtendedAttributes encodes a list of EAs into a FILE_FULL_EA_INFORMATION
// buffer for use with BackupWrite, ZwSetEaFile, etc.
func EncodeExtendedAttributes(eas []ExtendedAttribute) ([]byte, error) {
var buf bytes.Buffer
for i := range eas {
last := false
if i == len(eas)-1 {
last = true
}
err := writeEa(&buf, &eas[i], last)
if err != nil {
return nil, err
}
}
return buf.Bytes(), nil
}

89
vendor/github.com/Microsoft/go-winio/ea_test.go generated vendored Normal file
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@ -0,0 +1,89 @@
package winio
import (
"io/ioutil"
"os"
"reflect"
"syscall"
"testing"
"unsafe"
)
var (
testEas = []ExtendedAttribute{
{Name: "foo", Value: []byte("bar")},
{Name: "fizz", Value: []byte("buzz")},
}
testEasEncoded = []byte{16, 0, 0, 0, 0, 3, 3, 0, 102, 111, 111, 0, 98, 97, 114, 0, 0, 0, 0, 0, 0, 4, 4, 0, 102, 105, 122, 122, 0, 98, 117, 122, 122, 0, 0, 0}
testEasNotPadded = testEasEncoded[0 : len(testEasEncoded)-3]
testEasTruncated = testEasEncoded[0:20]
)
func Test_RoundTripEas(t *testing.T) {
b, err := EncodeExtendedAttributes(testEas)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(testEasEncoded, b) {
t.Fatalf("encoded mismatch %v %v", testEasEncoded, b)
}
eas, err := DecodeExtendedAttributes(b)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(testEas, eas) {
t.Fatalf("mismatch %+v %+v", testEas, eas)
}
}
func Test_EasDontNeedPaddingAtEnd(t *testing.T) {
eas, err := DecodeExtendedAttributes(testEasNotPadded)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(testEas, eas) {
t.Fatalf("mismatch %+v %+v", testEas, eas)
}
}
func Test_TruncatedEasFailCorrectly(t *testing.T) {
_, err := DecodeExtendedAttributes(testEasTruncated)
if err == nil {
t.Fatal("expected error")
}
}
func Test_NilEasEncodeAndDecodeAsNil(t *testing.T) {
b, err := EncodeExtendedAttributes(nil)
if err != nil {
t.Fatal(err)
}
if len(b) != 0 {
t.Fatal("expected empty")
}
eas, err := DecodeExtendedAttributes(nil)
if err != nil {
t.Fatal(err)
}
if len(eas) != 0 {
t.Fatal("expected empty")
}
}
// Test_SetFileEa makes sure that the test buffer is actually parsable by NtSetEaFile.
func Test_SetFileEa(t *testing.T) {
f, err := ioutil.TempFile("", "winio")
if err != nil {
t.Fatal(err)
}
defer os.Remove(f.Name())
defer f.Close()
ntdll := syscall.MustLoadDLL("ntdll.dll")
ntSetEaFile := ntdll.MustFindProc("NtSetEaFile")
var iosb [2]uintptr
r, _, _ := ntSetEaFile.Call(f.Fd(), uintptr(unsafe.Pointer(&iosb[0])), uintptr(unsafe.Pointer(&testEasEncoded[0])), uintptr(len(testEasEncoded)))
if r != 0 {
t.Fatalf("NtSetEaFile failed with %08x", r)
}
}

307
vendor/github.com/Microsoft/go-winio/file.go generated vendored Normal file
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@ -0,0 +1,307 @@
// +build windows
package winio
import (
"errors"
"io"
"runtime"
"sync"
"sync/atomic"
"syscall"
"time"
)
//sys cancelIoEx(file syscall.Handle, o *syscall.Overlapped) (err error) = CancelIoEx
//sys createIoCompletionPort(file syscall.Handle, port syscall.Handle, key uintptr, threadCount uint32) (newport syscall.Handle, err error) = CreateIoCompletionPort
//sys getQueuedCompletionStatus(port syscall.Handle, bytes *uint32, key *uintptr, o **ioOperation, timeout uint32) (err error) = GetQueuedCompletionStatus
//sys setFileCompletionNotificationModes(h syscall.Handle, flags uint8) (err error) = SetFileCompletionNotificationModes
type atomicBool int32
func (b *atomicBool) isSet() bool { return atomic.LoadInt32((*int32)(b)) != 0 }
func (b *atomicBool) setFalse() { atomic.StoreInt32((*int32)(b), 0) }
func (b *atomicBool) setTrue() { atomic.StoreInt32((*int32)(b), 1) }
func (b *atomicBool) swap(new bool) bool {
var newInt int32
if new {
newInt = 1
}
return atomic.SwapInt32((*int32)(b), newInt) == 1
}
const (
cFILE_SKIP_COMPLETION_PORT_ON_SUCCESS = 1
cFILE_SKIP_SET_EVENT_ON_HANDLE = 2
)
var (
ErrFileClosed = errors.New("file has already been closed")
ErrTimeout = &timeoutError{}
)
type timeoutError struct{}
func (e *timeoutError) Error() string { return "i/o timeout" }
func (e *timeoutError) Timeout() bool { return true }
func (e *timeoutError) Temporary() bool { return true }
type timeoutChan chan struct{}
var ioInitOnce sync.Once
var ioCompletionPort syscall.Handle
// ioResult contains the result of an asynchronous IO operation
type ioResult struct {
bytes uint32
err error
}
// ioOperation represents an outstanding asynchronous Win32 IO
type ioOperation struct {
o syscall.Overlapped
ch chan ioResult
}
func initIo() {
h, err := createIoCompletionPort(syscall.InvalidHandle, 0, 0, 0xffffffff)
if err != nil {
panic(err)
}
ioCompletionPort = h
go ioCompletionProcessor(h)
}
// win32File implements Reader, Writer, and Closer on a Win32 handle without blocking in a syscall.
// It takes ownership of this handle and will close it if it is garbage collected.
type win32File struct {
handle syscall.Handle
wg sync.WaitGroup
wgLock sync.RWMutex
closing atomicBool
readDeadline deadlineHandler
writeDeadline deadlineHandler
}
type deadlineHandler struct {
setLock sync.Mutex
channel timeoutChan
channelLock sync.RWMutex
timer *time.Timer
timedout atomicBool
}
// makeWin32File makes a new win32File from an existing file handle
func makeWin32File(h syscall.Handle) (*win32File, error) {
f := &win32File{handle: h}
ioInitOnce.Do(initIo)
_, err := createIoCompletionPort(h, ioCompletionPort, 0, 0xffffffff)
if err != nil {
return nil, err
}
err = setFileCompletionNotificationModes(h, cFILE_SKIP_COMPLETION_PORT_ON_SUCCESS|cFILE_SKIP_SET_EVENT_ON_HANDLE)
if err != nil {
return nil, err
}
f.readDeadline.channel = make(timeoutChan)
f.writeDeadline.channel = make(timeoutChan)
return f, nil
}
func MakeOpenFile(h syscall.Handle) (io.ReadWriteCloser, error) {
return makeWin32File(h)
}
// closeHandle closes the resources associated with a Win32 handle
func (f *win32File) closeHandle() {
f.wgLock.Lock()
// Atomically set that we are closing, releasing the resources only once.
if !f.closing.swap(true) {
f.wgLock.Unlock()
// cancel all IO and wait for it to complete
cancelIoEx(f.handle, nil)
f.wg.Wait()
// at this point, no new IO can start
syscall.Close(f.handle)
f.handle = 0
} else {
f.wgLock.Unlock()
}
}
// Close closes a win32File.
func (f *win32File) Close() error {
f.closeHandle()
return nil
}
// prepareIo prepares for a new IO operation.
// The caller must call f.wg.Done() when the IO is finished, prior to Close() returning.
func (f *win32File) prepareIo() (*ioOperation, error) {
f.wgLock.RLock()
if f.closing.isSet() {
f.wgLock.RUnlock()
return nil, ErrFileClosed
}
f.wg.Add(1)
f.wgLock.RUnlock()
c := &ioOperation{}
c.ch = make(chan ioResult)
return c, nil
}
// ioCompletionProcessor processes completed async IOs forever
func ioCompletionProcessor(h syscall.Handle) {
for {
var bytes uint32
var key uintptr
var op *ioOperation
err := getQueuedCompletionStatus(h, &bytes, &key, &op, syscall.INFINITE)
if op == nil {
panic(err)
}
op.ch <- ioResult{bytes, err}
}
}
// asyncIo processes the return value from ReadFile or WriteFile, blocking until
// the operation has actually completed.
func (f *win32File) asyncIo(c *ioOperation, d *deadlineHandler, bytes uint32, err error) (int, error) {
if err != syscall.ERROR_IO_PENDING {
return int(bytes), err
}
if f.closing.isSet() {
cancelIoEx(f.handle, &c.o)
}
var timeout timeoutChan
if d != nil {
d.channelLock.Lock()
timeout = d.channel
d.channelLock.Unlock()
}
var r ioResult
select {
case r = <-c.ch:
err = r.err
if err == syscall.ERROR_OPERATION_ABORTED {
if f.closing.isSet() {
err = ErrFileClosed
}
}
case <-timeout:
cancelIoEx(f.handle, &c.o)
r = <-c.ch
err = r.err
if err == syscall.ERROR_OPERATION_ABORTED {
err = ErrTimeout
}
}
// runtime.KeepAlive is needed, as c is passed via native
// code to ioCompletionProcessor, c must remain alive
// until the channel read is complete.
runtime.KeepAlive(c)
return int(r.bytes), err
}
// Read reads from a file handle.
func (f *win32File) Read(b []byte) (int, error) {
c, err := f.prepareIo()
if err != nil {
return 0, err
}
defer f.wg.Done()
if f.readDeadline.timedout.isSet() {
return 0, ErrTimeout
}
var bytes uint32
err = syscall.ReadFile(f.handle, b, &bytes, &c.o)
n, err := f.asyncIo(c, &f.readDeadline, bytes, err)
runtime.KeepAlive(b)
// Handle EOF conditions.
if err == nil && n == 0 && len(b) != 0 {
return 0, io.EOF
} else if err == syscall.ERROR_BROKEN_PIPE {
return 0, io.EOF
} else {
return n, err
}
}
// Write writes to a file handle.
func (f *win32File) Write(b []byte) (int, error) {
c, err := f.prepareIo()
if err != nil {
return 0, err
}
defer f.wg.Done()
if f.writeDeadline.timedout.isSet() {
return 0, ErrTimeout
}
var bytes uint32
err = syscall.WriteFile(f.handle, b, &bytes, &c.o)
n, err := f.asyncIo(c, &f.writeDeadline, bytes, err)
runtime.KeepAlive(b)
return n, err
}
func (f *win32File) SetReadDeadline(deadline time.Time) error {
return f.readDeadline.set(deadline)
}
func (f *win32File) SetWriteDeadline(deadline time.Time) error {
return f.writeDeadline.set(deadline)
}
func (f *win32File) Flush() error {
return syscall.FlushFileBuffers(f.handle)
}
func (d *deadlineHandler) set(deadline time.Time) error {
d.setLock.Lock()
defer d.setLock.Unlock()
if d.timer != nil {
if !d.timer.Stop() {
<-d.channel
}
d.timer = nil
}
d.timedout.setFalse()
select {
case <-d.channel:
d.channelLock.Lock()
d.channel = make(chan struct{})
d.channelLock.Unlock()
default:
}
if deadline.IsZero() {
return nil
}
timeoutIO := func() {
d.timedout.setTrue()
close(d.channel)
}
now := time.Now()
duration := deadline.Sub(now)
if deadline.After(now) {
// Deadline is in the future, set a timer to wait
d.timer = time.AfterFunc(duration, timeoutIO)
} else {
// Deadline is in the past. Cancel all pending IO now.
timeoutIO()
}
return nil
}

60
vendor/github.com/Microsoft/go-winio/fileinfo.go generated vendored Normal file
View file

@ -0,0 +1,60 @@
// +build windows
package winio
import (
"os"
"runtime"
"syscall"
"unsafe"
)
//sys getFileInformationByHandleEx(h syscall.Handle, class uint32, buffer *byte, size uint32) (err error) = GetFileInformationByHandleEx
//sys setFileInformationByHandle(h syscall.Handle, class uint32, buffer *byte, size uint32) (err error) = SetFileInformationByHandle
const (
fileBasicInfo = 0
fileIDInfo = 0x12
)
// FileBasicInfo contains file access time and file attributes information.
type FileBasicInfo struct {
CreationTime, LastAccessTime, LastWriteTime, ChangeTime syscall.Filetime
FileAttributes uintptr // includes padding
}
// GetFileBasicInfo retrieves times and attributes for a file.
func GetFileBasicInfo(f *os.File) (*FileBasicInfo, error) {
bi := &FileBasicInfo{}
if err := getFileInformationByHandleEx(syscall.Handle(f.Fd()), fileBasicInfo, (*byte)(unsafe.Pointer(bi)), uint32(unsafe.Sizeof(*bi))); err != nil {
return nil, &os.PathError{Op: "GetFileInformationByHandleEx", Path: f.Name(), Err: err}
}
runtime.KeepAlive(f)
return bi, nil
}
// SetFileBasicInfo sets times and attributes for a file.
func SetFileBasicInfo(f *os.File, bi *FileBasicInfo) error {
if err := setFileInformationByHandle(syscall.Handle(f.Fd()), fileBasicInfo, (*byte)(unsafe.Pointer(bi)), uint32(unsafe.Sizeof(*bi))); err != nil {
return &os.PathError{Op: "SetFileInformationByHandle", Path: f.Name(), Err: err}
}
runtime.KeepAlive(f)
return nil
}
// FileIDInfo contains the volume serial number and file ID for a file. This pair should be
// unique on a system.
type FileIDInfo struct {
VolumeSerialNumber uint64
FileID [16]byte
}
// GetFileID retrieves the unique (volume, file ID) pair for a file.
func GetFileID(f *os.File) (*FileIDInfo, error) {
fileID := &FileIDInfo{}
if err := getFileInformationByHandleEx(syscall.Handle(f.Fd()), fileIDInfo, (*byte)(unsafe.Pointer(fileID)), uint32(unsafe.Sizeof(*fileID))); err != nil {
return nil, &os.PathError{Op: "GetFileInformationByHandleEx", Path: f.Name(), Err: err}
}
runtime.KeepAlive(f)
return fileID, nil
}

424
vendor/github.com/Microsoft/go-winio/pipe.go generated vendored Normal file
View file

@ -0,0 +1,424 @@
// +build windows
package winio
import (
"errors"
"io"
"net"
"os"
"syscall"
"time"
"unsafe"
)
//sys connectNamedPipe(pipe syscall.Handle, o *syscall.Overlapped) (err error) = ConnectNamedPipe
//sys createNamedPipe(name string, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *syscall.SecurityAttributes) (handle syscall.Handle, err error) [failretval==syscall.InvalidHandle] = CreateNamedPipeW
//sys createFile(name string, access uint32, mode uint32, sa *syscall.SecurityAttributes, createmode uint32, attrs uint32, templatefile syscall.Handle) (handle syscall.Handle, err error) [failretval==syscall.InvalidHandle] = CreateFileW
//sys waitNamedPipe(name string, timeout uint32) (err error) = WaitNamedPipeW
//sys getNamedPipeInfo(pipe syscall.Handle, flags *uint32, outSize *uint32, inSize *uint32, maxInstances *uint32) (err error) = GetNamedPipeInfo
//sys getNamedPipeHandleState(pipe syscall.Handle, state *uint32, curInstances *uint32, maxCollectionCount *uint32, collectDataTimeout *uint32, userName *uint16, maxUserNameSize uint32) (err error) = GetNamedPipeHandleStateW
//sys localAlloc(uFlags uint32, length uint32) (ptr uintptr) = LocalAlloc
const (
cERROR_PIPE_BUSY = syscall.Errno(231)
cERROR_NO_DATA = syscall.Errno(232)
cERROR_PIPE_CONNECTED = syscall.Errno(535)
cERROR_SEM_TIMEOUT = syscall.Errno(121)
cPIPE_ACCESS_DUPLEX = 0x3
cFILE_FLAG_FIRST_PIPE_INSTANCE = 0x80000
cSECURITY_SQOS_PRESENT = 0x100000
cSECURITY_ANONYMOUS = 0
cPIPE_REJECT_REMOTE_CLIENTS = 0x8
cPIPE_UNLIMITED_INSTANCES = 255
cNMPWAIT_USE_DEFAULT_WAIT = 0
cNMPWAIT_NOWAIT = 1
cPIPE_TYPE_MESSAGE = 4
cPIPE_READMODE_MESSAGE = 2
)
var (
// ErrPipeListenerClosed is returned for pipe operations on listeners that have been closed.
// This error should match net.errClosing since docker takes a dependency on its text.
ErrPipeListenerClosed = errors.New("use of closed network connection")
errPipeWriteClosed = errors.New("pipe has been closed for write")
)
type win32Pipe struct {
*win32File
path string
}
type win32MessageBytePipe struct {
win32Pipe
writeClosed bool
readEOF bool
}
type pipeAddress string
func (f *win32Pipe) LocalAddr() net.Addr {
return pipeAddress(f.path)
}
func (f *win32Pipe) RemoteAddr() net.Addr {
return pipeAddress(f.path)
}
func (f *win32Pipe) SetDeadline(t time.Time) error {
f.SetReadDeadline(t)
f.SetWriteDeadline(t)
return nil
}
// CloseWrite closes the write side of a message pipe in byte mode.
func (f *win32MessageBytePipe) CloseWrite() error {
if f.writeClosed {
return errPipeWriteClosed
}
err := f.win32File.Flush()
if err != nil {
return err
}
_, err = f.win32File.Write(nil)
if err != nil {
return err
}
f.writeClosed = true
return nil
}
// Write writes bytes to a message pipe in byte mode. Zero-byte writes are ignored, since
// they are used to implement CloseWrite().
func (f *win32MessageBytePipe) Write(b []byte) (int, error) {
if f.writeClosed {
return 0, errPipeWriteClosed
}
if len(b) == 0 {
return 0, nil
}
return f.win32File.Write(b)
}
// Read reads bytes from a message pipe in byte mode. A read of a zero-byte message on a message
// mode pipe will return io.EOF, as will all subsequent reads.
func (f *win32MessageBytePipe) Read(b []byte) (int, error) {
if f.readEOF {
return 0, io.EOF
}
n, err := f.win32File.Read(b)
if err == io.EOF {
// If this was the result of a zero-byte read, then
// it is possible that the read was due to a zero-size
// message. Since we are simulating CloseWrite with a
// zero-byte message, ensure that all future Read() calls
// also return EOF.
f.readEOF = true
}
return n, err
}
func (s pipeAddress) Network() string {
return "pipe"
}
func (s pipeAddress) String() string {
return string(s)
}
// DialPipe connects to a named pipe by path, timing out if the connection
// takes longer than the specified duration. If timeout is nil, then the timeout
// is the default timeout established by the pipe server.
func DialPipe(path string, timeout *time.Duration) (net.Conn, error) {
var absTimeout time.Time
if timeout != nil {
absTimeout = time.Now().Add(*timeout)
}
var err error
var h syscall.Handle
for {
h, err = createFile(path, syscall.GENERIC_READ|syscall.GENERIC_WRITE, 0, nil, syscall.OPEN_EXISTING, syscall.FILE_FLAG_OVERLAPPED|cSECURITY_SQOS_PRESENT|cSECURITY_ANONYMOUS, 0)
if err != cERROR_PIPE_BUSY {
break
}
now := time.Now()
var ms uint32
if absTimeout.IsZero() {
ms = cNMPWAIT_USE_DEFAULT_WAIT
} else if now.After(absTimeout) {
ms = cNMPWAIT_NOWAIT
} else {
ms = uint32(absTimeout.Sub(now).Nanoseconds() / 1000 / 1000)
}
err = waitNamedPipe(path, ms)
if err != nil {
if err == cERROR_SEM_TIMEOUT {
return nil, ErrTimeout
}
break
}
}
if err != nil {
return nil, &os.PathError{Op: "open", Path: path, Err: err}
}
var flags uint32
err = getNamedPipeInfo(h, &flags, nil, nil, nil)
if err != nil {
return nil, err
}
var state uint32
err = getNamedPipeHandleState(h, &state, nil, nil, nil, nil, 0)
if err != nil {
return nil, err
}
if state&cPIPE_READMODE_MESSAGE != 0 {
return nil, &os.PathError{Op: "open", Path: path, Err: errors.New("message readmode pipes not supported")}
}
f, err := makeWin32File(h)
if err != nil {
syscall.Close(h)
return nil, err
}
// If the pipe is in message mode, return a message byte pipe, which
// supports CloseWrite().
if flags&cPIPE_TYPE_MESSAGE != 0 {
return &win32MessageBytePipe{
win32Pipe: win32Pipe{win32File: f, path: path},
}, nil
}
return &win32Pipe{win32File: f, path: path}, nil
}
type acceptResponse struct {
f *win32File
err error
}
type win32PipeListener struct {
firstHandle syscall.Handle
path string
securityDescriptor []byte
config PipeConfig
acceptCh chan (chan acceptResponse)
closeCh chan int
doneCh chan int
}
func makeServerPipeHandle(path string, securityDescriptor []byte, c *PipeConfig, first bool) (syscall.Handle, error) {
var flags uint32 = cPIPE_ACCESS_DUPLEX | syscall.FILE_FLAG_OVERLAPPED
if first {
flags |= cFILE_FLAG_FIRST_PIPE_INSTANCE
}
var mode uint32 = cPIPE_REJECT_REMOTE_CLIENTS
if c.MessageMode {
mode |= cPIPE_TYPE_MESSAGE
}
sa := &syscall.SecurityAttributes{}
sa.Length = uint32(unsafe.Sizeof(*sa))
if securityDescriptor != nil {
len := uint32(len(securityDescriptor))
sa.SecurityDescriptor = localAlloc(0, len)
defer localFree(sa.SecurityDescriptor)
copy((*[0xffff]byte)(unsafe.Pointer(sa.SecurityDescriptor))[:], securityDescriptor)
}
h, err := createNamedPipe(path, flags, mode, cPIPE_UNLIMITED_INSTANCES, uint32(c.OutputBufferSize), uint32(c.InputBufferSize), 0, sa)
if err != nil {
return 0, &os.PathError{Op: "open", Path: path, Err: err}
}
return h, nil
}
func (l *win32PipeListener) makeServerPipe() (*win32File, error) {
h, err := makeServerPipeHandle(l.path, l.securityDescriptor, &l.config, false)
if err != nil {
return nil, err
}
f, err := makeWin32File(h)
if err != nil {
syscall.Close(h)
return nil, err
}
return f, nil
}
func (l *win32PipeListener) makeConnectedServerPipe() (*win32File, error) {
p, err := l.makeServerPipe()
if err != nil {
return nil, err
}
// Wait for the client to connect.
ch := make(chan error)
go func(p *win32File) {
ch <- connectPipe(p)
}(p)
select {
case err = <-ch:
if err != nil {
p.Close()
p = nil
}
case <-l.closeCh:
// Abort the connect request by closing the handle.
p.Close()
p = nil
err = <-ch
if err == nil || err == ErrFileClosed {
err = ErrPipeListenerClosed
}
}
return p, err
}
func (l *win32PipeListener) listenerRoutine() {
closed := false
for !closed {
select {
case <-l.closeCh:
closed = true
case responseCh := <-l.acceptCh:
var (
p *win32File
err error
)
for {
p, err = l.makeConnectedServerPipe()
// If the connection was immediately closed by the client, try
// again.
if err != cERROR_NO_DATA {
break
}
}
responseCh <- acceptResponse{p, err}
closed = err == ErrPipeListenerClosed
}
}
syscall.Close(l.firstHandle)
l.firstHandle = 0
// Notify Close() and Accept() callers that the handle has been closed.
close(l.doneCh)
}
// PipeConfig contain configuration for the pipe listener.
type PipeConfig struct {
// SecurityDescriptor contains a Windows security descriptor in SDDL format.
SecurityDescriptor string
// MessageMode determines whether the pipe is in byte or message mode. In either
// case the pipe is read in byte mode by default. The only practical difference in
// this implementation is that CloseWrite() is only supported for message mode pipes;
// CloseWrite() is implemented as a zero-byte write, but zero-byte writes are only
// transferred to the reader (and returned as io.EOF in this implementation)
// when the pipe is in message mode.
MessageMode bool
// InputBufferSize specifies the size the input buffer, in bytes.
InputBufferSize int32
// OutputBufferSize specifies the size the input buffer, in bytes.
OutputBufferSize int32
}
// ListenPipe creates a listener on a Windows named pipe path, e.g. \\.\pipe\mypipe.
// The pipe must not already exist.
func ListenPipe(path string, c *PipeConfig) (net.Listener, error) {
var (
sd []byte
err error
)
if c == nil {
c = &PipeConfig{}
}
if c.SecurityDescriptor != "" {
sd, err = SddlToSecurityDescriptor(c.SecurityDescriptor)
if err != nil {
return nil, err
}
}
h, err := makeServerPipeHandle(path, sd, c, true)
if err != nil {
return nil, err
}
// Immediately open and then close a client handle so that the named pipe is
// created but not currently accepting connections.
h2, err := createFile(path, 0, 0, nil, syscall.OPEN_EXISTING, cSECURITY_SQOS_PRESENT|cSECURITY_ANONYMOUS, 0)
if err != nil {
syscall.Close(h)
return nil, err
}
syscall.Close(h2)
l := &win32PipeListener{
firstHandle: h,
path: path,
securityDescriptor: sd,
config: *c,
acceptCh: make(chan (chan acceptResponse)),
closeCh: make(chan int),
doneCh: make(chan int),
}
go l.listenerRoutine()
return l, nil
}
func connectPipe(p *win32File) error {
c, err := p.prepareIo()
if err != nil {
return err
}
defer p.wg.Done()
err = connectNamedPipe(p.handle, &c.o)
_, err = p.asyncIo(c, nil, 0, err)
if err != nil && err != cERROR_PIPE_CONNECTED {
return err
}
return nil
}
func (l *win32PipeListener) Accept() (net.Conn, error) {
ch := make(chan acceptResponse)
select {
case l.acceptCh <- ch:
response := <-ch
err := response.err
if err != nil {
return nil, err
}
if l.config.MessageMode {
return &win32MessageBytePipe{
win32Pipe: win32Pipe{win32File: response.f, path: l.path},
}, nil
}
return &win32Pipe{win32File: response.f, path: l.path}, nil
case <-l.doneCh:
return nil, ErrPipeListenerClosed
}
}
func (l *win32PipeListener) Close() error {
select {
case l.closeCh <- 1:
<-l.doneCh
case <-l.doneCh:
}
return nil
}
func (l *win32PipeListener) Addr() net.Addr {
return pipeAddress(l.path)
}

453
vendor/github.com/Microsoft/go-winio/pipe_test.go generated vendored Normal file
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@ -0,0 +1,453 @@
package winio
import (
"bufio"
"io"
"net"
"os"
"syscall"
"testing"
"time"
)
var testPipeName = `\\.\pipe\winiotestpipe`
var aLongTimeAgo = time.Unix(1, 0)
func TestDialUnknownFailsImmediately(t *testing.T) {
_, err := DialPipe(testPipeName, nil)
if err.(*os.PathError).Err != syscall.ENOENT {
t.Fatalf("expected ENOENT got %v", err)
}
}
func TestDialListenerTimesOut(t *testing.T) {
l, err := ListenPipe(testPipeName, nil)
if err != nil {
t.Fatal(err)
}
defer l.Close()
var d = time.Duration(10 * time.Millisecond)
_, err = DialPipe(testPipeName, &d)
if err != ErrTimeout {
t.Fatalf("expected ErrTimeout, got %v", err)
}
}
func TestDialAccessDeniedWithRestrictedSD(t *testing.T) {
c := PipeConfig{
SecurityDescriptor: "D:P(A;;0x1200FF;;;WD)",
}
l, err := ListenPipe(testPipeName, &c)
if err != nil {
t.Fatal(err)
}
defer l.Close()
_, err = DialPipe(testPipeName, nil)
if err.(*os.PathError).Err != syscall.ERROR_ACCESS_DENIED {
t.Fatalf("expected ERROR_ACCESS_DENIED, got %v", err)
}
}
func getConnection(cfg *PipeConfig) (client net.Conn, server net.Conn, err error) {
l, err := ListenPipe(testPipeName, cfg)
if err != nil {
return
}
defer l.Close()
type response struct {
c net.Conn
err error
}
ch := make(chan response)
go func() {
c, err := l.Accept()
ch <- response{c, err}
}()
c, err := DialPipe(testPipeName, nil)
if err != nil {
return
}
r := <-ch
if err = r.err; err != nil {
c.Close()
return
}
client = c
server = r.c
return
}
func TestReadTimeout(t *testing.T) {
c, s, err := getConnection(nil)
if err != nil {
t.Fatal(err)
}
defer c.Close()
defer s.Close()
c.SetReadDeadline(time.Now().Add(10 * time.Millisecond))
buf := make([]byte, 10)
_, err = c.Read(buf)
if err != ErrTimeout {
t.Fatalf("expected ErrTimeout, got %v", err)
}
}
func server(l net.Listener, ch chan int) {
c, err := l.Accept()
if err != nil {
panic(err)
}
rw := bufio.NewReadWriter(bufio.NewReader(c), bufio.NewWriter(c))
s, err := rw.ReadString('\n')
if err != nil {
panic(err)
}
_, err = rw.WriteString("got " + s)
if err != nil {
panic(err)
}
err = rw.Flush()
if err != nil {
panic(err)
}
c.Close()
ch <- 1
}
func TestFullListenDialReadWrite(t *testing.T) {
l, err := ListenPipe(testPipeName, nil)
if err != nil {
t.Fatal(err)
}
defer l.Close()
ch := make(chan int)
go server(l, ch)
c, err := DialPipe(testPipeName, nil)
if err != nil {
t.Fatal(err)
}
defer c.Close()
rw := bufio.NewReadWriter(bufio.NewReader(c), bufio.NewWriter(c))
_, err = rw.WriteString("hello world\n")
if err != nil {
t.Fatal(err)
}
err = rw.Flush()
if err != nil {
t.Fatal(err)
}
s, err := rw.ReadString('\n')
if err != nil {
t.Fatal(err)
}
ms := "got hello world\n"
if s != ms {
t.Errorf("expected '%s', got '%s'", ms, s)
}
<-ch
}
func TestCloseAbortsListen(t *testing.T) {
l, err := ListenPipe(testPipeName, nil)
if err != nil {
t.Fatal(err)
}
ch := make(chan error)
go func() {
_, err := l.Accept()
ch <- err
}()
time.Sleep(30 * time.Millisecond)
l.Close()
err = <-ch
if err != ErrPipeListenerClosed {
t.Fatalf("expected ErrPipeListenerClosed, got %v", err)
}
}
func ensureEOFOnClose(t *testing.T, r io.Reader, w io.Closer) {
b := make([]byte, 10)
w.Close()
n, err := r.Read(b)
if n > 0 {
t.Errorf("unexpected byte count %d", n)
}
if err != io.EOF {
t.Errorf("expected EOF: %v", err)
}
}
func TestCloseClientEOFServer(t *testing.T) {
c, s, err := getConnection(nil)
if err != nil {
t.Fatal(err)
}
defer c.Close()
defer s.Close()
ensureEOFOnClose(t, c, s)
}
func TestCloseServerEOFClient(t *testing.T) {
c, s, err := getConnection(nil)
if err != nil {
t.Fatal(err)
}
defer c.Close()
defer s.Close()
ensureEOFOnClose(t, s, c)
}
func TestCloseWriteEOF(t *testing.T) {
cfg := &PipeConfig{
MessageMode: true,
}
c, s, err := getConnection(cfg)
if err != nil {
t.Fatal(err)
}
defer c.Close()
defer s.Close()
type closeWriter interface {
CloseWrite() error
}
err = c.(closeWriter).CloseWrite()
if err != nil {
t.Fatal(err)
}
b := make([]byte, 10)
_, err = s.Read(b)
if err != io.EOF {
t.Fatal(err)
}
}
func TestAcceptAfterCloseFails(t *testing.T) {
l, err := ListenPipe(testPipeName, nil)
if err != nil {
t.Fatal(err)
}
l.Close()
_, err = l.Accept()
if err != ErrPipeListenerClosed {
t.Fatalf("expected ErrPipeListenerClosed, got %v", err)
}
}
func TestDialTimesOutByDefault(t *testing.T) {
l, err := ListenPipe(testPipeName, nil)
if err != nil {
t.Fatal(err)
}
defer l.Close()
_, err = DialPipe(testPipeName, nil)
if err != ErrTimeout {
t.Fatalf("expected ErrTimeout, got %v", err)
}
}
func TestTimeoutPendingRead(t *testing.T) {
l, err := ListenPipe(testPipeName, nil)
if err != nil {
t.Fatal(err)
}
defer l.Close()
serverDone := make(chan struct{})
go func() {
s, err := l.Accept()
if err != nil {
t.Fatal(err)
}
time.Sleep(1 * time.Second)
s.Close()
close(serverDone)
}()
client, err := DialPipe(testPipeName, nil)
if err != nil {
t.Fatal(err)
}
defer client.Close()
clientErr := make(chan error)
go func() {
buf := make([]byte, 10)
_, err = client.Read(buf)
clientErr <- err
}()
time.Sleep(100 * time.Millisecond) // make *sure* the pipe is reading before we set the deadline
client.SetReadDeadline(aLongTimeAgo)
select {
case err = <-clientErr:
if err != ErrTimeout {
t.Fatalf("expected ErrTimeout, got %v", err)
}
case <-time.After(100 * time.Millisecond):
t.Fatalf("timed out while waiting for read to cancel")
<-clientErr
}
<-serverDone
}
func TestTimeoutPendingWrite(t *testing.T) {
l, err := ListenPipe(testPipeName, nil)
if err != nil {
t.Fatal(err)
}
defer l.Close()
serverDone := make(chan struct{})
go func() {
s, err := l.Accept()
if err != nil {
t.Fatal(err)
}
time.Sleep(1 * time.Second)
s.Close()
close(serverDone)
}()
client, err := DialPipe(testPipeName, nil)
if err != nil {
t.Fatal(err)
}
defer client.Close()
clientErr := make(chan error)
go func() {
_, err = client.Write([]byte("this should timeout"))
clientErr <- err
}()
time.Sleep(100 * time.Millisecond) // make *sure* the pipe is writing before we set the deadline
client.SetWriteDeadline(aLongTimeAgo)
select {
case err = <-clientErr:
if err != ErrTimeout {
t.Fatalf("expected ErrTimeout, got %v", err)
}
case <-time.After(100 * time.Millisecond):
t.Fatalf("timed out while waiting for write to cancel")
<-clientErr
}
<-serverDone
}
type CloseWriter interface {
CloseWrite() error
}
func TestEchoWithMessaging(t *testing.T) {
c := PipeConfig{
MessageMode: true, // Use message mode so that CloseWrite() is supported
InputBufferSize: 65536, // Use 64KB buffers to improve performance
OutputBufferSize: 65536,
}
l, err := ListenPipe(testPipeName, &c)
if err != nil {
t.Fatal(err)
}
defer l.Close()
listenerDone := make(chan bool)
clientDone := make(chan bool)
go func() {
// server echo
conn, e := l.Accept()
if e != nil {
t.Fatal(e)
}
defer conn.Close()
time.Sleep(500 * time.Millisecond) // make *sure* we don't begin to read before eof signal is sent
io.Copy(conn, conn)
conn.(CloseWriter).CloseWrite()
close(listenerDone)
}()
timeout := 1 * time.Second
client, err := DialPipe(testPipeName, &timeout)
if err != nil {
t.Fatal(err)
}
defer client.Close()
go func() {
// client read back
bytes := make([]byte, 2)
n, e := client.Read(bytes)
if e != nil {
t.Fatal(e)
}
if n != 2 {
t.Fatalf("expected 2 bytes, got %v", n)
}
close(clientDone)
}()
payload := make([]byte, 2)
payload[0] = 0
payload[1] = 1
n, err := client.Write(payload)
if err != nil {
t.Fatal(err)
}
if n != 2 {
t.Fatalf("expected 2 bytes, got %v", n)
}
client.(CloseWriter).CloseWrite()
<-listenerDone
<-clientDone
}
func TestConnectRace(t *testing.T) {
l, err := ListenPipe(testPipeName, nil)
if err != nil {
t.Fatal(err)
}
defer l.Close()
go func() {
for {
s, err := l.Accept()
if err == ErrPipeListenerClosed {
return
}
if err != nil {
t.Fatal(err)
}
s.Close()
}
}()
for i := 0; i < 1000; i++ {
c, err := DialPipe(testPipeName, nil)
if err != nil {
t.Fatal(err)
}
c.Close()
}
}

202
vendor/github.com/Microsoft/go-winio/privilege.go generated vendored Normal file
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@ -0,0 +1,202 @@
// +build windows
package winio
import (
"bytes"
"encoding/binary"
"fmt"
"runtime"
"sync"
"syscall"
"unicode/utf16"
"golang.org/x/sys/windows"
)
//sys adjustTokenPrivileges(token windows.Token, releaseAll bool, input *byte, outputSize uint32, output *byte, requiredSize *uint32) (success bool, err error) [true] = advapi32.AdjustTokenPrivileges
//sys impersonateSelf(level uint32) (err error) = advapi32.ImpersonateSelf
//sys revertToSelf() (err error) = advapi32.RevertToSelf
//sys openThreadToken(thread syscall.Handle, accessMask uint32, openAsSelf bool, token *windows.Token) (err error) = advapi32.OpenThreadToken
//sys getCurrentThread() (h syscall.Handle) = GetCurrentThread
//sys lookupPrivilegeValue(systemName string, name string, luid *uint64) (err error) = advapi32.LookupPrivilegeValueW
//sys lookupPrivilegeName(systemName string, luid *uint64, buffer *uint16, size *uint32) (err error) = advapi32.LookupPrivilegeNameW
//sys lookupPrivilegeDisplayName(systemName string, name *uint16, buffer *uint16, size *uint32, languageId *uint32) (err error) = advapi32.LookupPrivilegeDisplayNameW
const (
SE_PRIVILEGE_ENABLED = 2
ERROR_NOT_ALL_ASSIGNED syscall.Errno = 1300
SeBackupPrivilege = "SeBackupPrivilege"
SeRestorePrivilege = "SeRestorePrivilege"
)
const (
securityAnonymous = iota
securityIdentification
securityImpersonation
securityDelegation
)
var (
privNames = make(map[string]uint64)
privNameMutex sync.Mutex
)
// PrivilegeError represents an error enabling privileges.
type PrivilegeError struct {
privileges []uint64
}
func (e *PrivilegeError) Error() string {
s := ""
if len(e.privileges) > 1 {
s = "Could not enable privileges "
} else {
s = "Could not enable privilege "
}
for i, p := range e.privileges {
if i != 0 {
s += ", "
}
s += `"`
s += getPrivilegeName(p)
s += `"`
}
return s
}
// RunWithPrivilege enables a single privilege for a function call.
func RunWithPrivilege(name string, fn func() error) error {
return RunWithPrivileges([]string{name}, fn)
}
// RunWithPrivileges enables privileges for a function call.
func RunWithPrivileges(names []string, fn func() error) error {
privileges, err := mapPrivileges(names)
if err != nil {
return err
}
runtime.LockOSThread()
defer runtime.UnlockOSThread()
token, err := newThreadToken()
if err != nil {
return err
}
defer releaseThreadToken(token)
err = adjustPrivileges(token, privileges, SE_PRIVILEGE_ENABLED)
if err != nil {
return err
}
return fn()
}
func mapPrivileges(names []string) ([]uint64, error) {
var privileges []uint64
privNameMutex.Lock()
defer privNameMutex.Unlock()
for _, name := range names {
p, ok := privNames[name]
if !ok {
err := lookupPrivilegeValue("", name, &p)
if err != nil {
return nil, err
}
privNames[name] = p
}
privileges = append(privileges, p)
}
return privileges, nil
}
// EnableProcessPrivileges enables privileges globally for the process.
func EnableProcessPrivileges(names []string) error {
return enableDisableProcessPrivilege(names, SE_PRIVILEGE_ENABLED)
}
// DisableProcessPrivileges disables privileges globally for the process.
func DisableProcessPrivileges(names []string) error {
return enableDisableProcessPrivilege(names, 0)
}
func enableDisableProcessPrivilege(names []string, action uint32) error {
privileges, err := mapPrivileges(names)
if err != nil {
return err
}
p, _ := windows.GetCurrentProcess()
var token windows.Token
err = windows.OpenProcessToken(p, windows.TOKEN_ADJUST_PRIVILEGES|windows.TOKEN_QUERY, &token)
if err != nil {
return err
}
defer token.Close()
return adjustPrivileges(token, privileges, action)
}
func adjustPrivileges(token windows.Token, privileges []uint64, action uint32) error {
var b bytes.Buffer
binary.Write(&b, binary.LittleEndian, uint32(len(privileges)))
for _, p := range privileges {
binary.Write(&b, binary.LittleEndian, p)
binary.Write(&b, binary.LittleEndian, action)
}
prevState := make([]byte, b.Len())
reqSize := uint32(0)
success, err := adjustTokenPrivileges(token, false, &b.Bytes()[0], uint32(len(prevState)), &prevState[0], &reqSize)
if !success {
return err
}
if err == ERROR_NOT_ALL_ASSIGNED {
return &PrivilegeError{privileges}
}
return nil
}
func getPrivilegeName(luid uint64) string {
var nameBuffer [256]uint16
bufSize := uint32(len(nameBuffer))
err := lookupPrivilegeName("", &luid, &nameBuffer[0], &bufSize)
if err != nil {
return fmt.Sprintf("<unknown privilege %d>", luid)
}
var displayNameBuffer [256]uint16
displayBufSize := uint32(len(displayNameBuffer))
var langID uint32
err = lookupPrivilegeDisplayName("", &nameBuffer[0], &displayNameBuffer[0], &displayBufSize, &langID)
if err != nil {
return fmt.Sprintf("<unknown privilege %s>", string(utf16.Decode(nameBuffer[:bufSize])))
}
return string(utf16.Decode(displayNameBuffer[:displayBufSize]))
}
func newThreadToken() (windows.Token, error) {
err := impersonateSelf(securityImpersonation)
if err != nil {
return 0, err
}
var token windows.Token
err = openThreadToken(getCurrentThread(), syscall.TOKEN_ADJUST_PRIVILEGES|syscall.TOKEN_QUERY, false, &token)
if err != nil {
rerr := revertToSelf()
if rerr != nil {
panic(rerr)
}
return 0, err
}
return token, nil
}
func releaseThreadToken(h windows.Token) {
err := revertToSelf()
if err != nil {
panic(err)
}
h.Close()
}

17
vendor/github.com/Microsoft/go-winio/privileges_test.go generated vendored Normal file
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@ -0,0 +1,17 @@
package winio
import "testing"
func TestRunWithUnavailablePrivilege(t *testing.T) {
err := RunWithPrivilege("SeCreateTokenPrivilege", func() error { return nil })
if _, ok := err.(*PrivilegeError); err == nil || !ok {
t.Fatal("expected PrivilegeError")
}
}
func TestRunWithPrivileges(t *testing.T) {
err := RunWithPrivilege("SeShutdownPrivilege", func() error { return nil })
if err != nil {
t.Fatal(err)
}
}

128
vendor/github.com/Microsoft/go-winio/reparse.go generated vendored Normal file
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package winio
import (
"bytes"
"encoding/binary"
"fmt"
"strings"
"unicode/utf16"
"unsafe"
)
const (
reparseTagMountPoint = 0xA0000003
reparseTagSymlink = 0xA000000C
)
type reparseDataBuffer struct {
ReparseTag uint32
ReparseDataLength uint16
Reserved uint16
SubstituteNameOffset uint16
SubstituteNameLength uint16
PrintNameOffset uint16
PrintNameLength uint16
}
// ReparsePoint describes a Win32 symlink or mount point.
type ReparsePoint struct {
Target string
IsMountPoint bool
}
// UnsupportedReparsePointError is returned when trying to decode a non-symlink or
// mount point reparse point.
type UnsupportedReparsePointError struct {
Tag uint32
}
func (e *UnsupportedReparsePointError) Error() string {
return fmt.Sprintf("unsupported reparse point %x", e.Tag)
}
// DecodeReparsePoint decodes a Win32 REPARSE_DATA_BUFFER structure containing either a symlink
// or a mount point.
func DecodeReparsePoint(b []byte) (*ReparsePoint, error) {
tag := binary.LittleEndian.Uint32(b[0:4])
return DecodeReparsePointData(tag, b[8:])
}
func DecodeReparsePointData(tag uint32, b []byte) (*ReparsePoint, error) {
isMountPoint := false
switch tag {
case reparseTagMountPoint:
isMountPoint = true
case reparseTagSymlink:
default:
return nil, &UnsupportedReparsePointError{tag}
}
nameOffset := 8 + binary.LittleEndian.Uint16(b[4:6])
if !isMountPoint {
nameOffset += 4
}
nameLength := binary.LittleEndian.Uint16(b[6:8])
name := make([]uint16, nameLength/2)
err := binary.Read(bytes.NewReader(b[nameOffset:nameOffset+nameLength]), binary.LittleEndian, &name)
if err != nil {
return nil, err
}
return &ReparsePoint{string(utf16.Decode(name)), isMountPoint}, nil
}
func isDriveLetter(c byte) bool {
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
}
// EncodeReparsePoint encodes a Win32 REPARSE_DATA_BUFFER structure describing a symlink or
// mount point.
func EncodeReparsePoint(rp *ReparsePoint) []byte {
// Generate an NT path and determine if this is a relative path.
var ntTarget string
relative := false
if strings.HasPrefix(rp.Target, `\\?\`) {
ntTarget = `\??\` + rp.Target[4:]
} else if strings.HasPrefix(rp.Target, `\\`) {
ntTarget = `\??\UNC\` + rp.Target[2:]
} else if len(rp.Target) >= 2 && isDriveLetter(rp.Target[0]) && rp.Target[1] == ':' {
ntTarget = `\??\` + rp.Target
} else {
ntTarget = rp.Target
relative = true
}
// The paths must be NUL-terminated even though they are counted strings.
target16 := utf16.Encode([]rune(rp.Target + "\x00"))
ntTarget16 := utf16.Encode([]rune(ntTarget + "\x00"))
size := int(unsafe.Sizeof(reparseDataBuffer{})) - 8
size += len(ntTarget16)*2 + len(target16)*2
tag := uint32(reparseTagMountPoint)
if !rp.IsMountPoint {
tag = reparseTagSymlink
size += 4 // Add room for symlink flags
}
data := reparseDataBuffer{
ReparseTag: tag,
ReparseDataLength: uint16(size),
SubstituteNameOffset: 0,
SubstituteNameLength: uint16((len(ntTarget16) - 1) * 2),
PrintNameOffset: uint16(len(ntTarget16) * 2),
PrintNameLength: uint16((len(target16) - 1) * 2),
}
var b bytes.Buffer
binary.Write(&b, binary.LittleEndian, &data)
if !rp.IsMountPoint {
flags := uint32(0)
if relative {
flags |= 1
}
binary.Write(&b, binary.LittleEndian, flags)
}
binary.Write(&b, binary.LittleEndian, ntTarget16)
binary.Write(&b, binary.LittleEndian, target16)
return b.Bytes()
}

98
vendor/github.com/Microsoft/go-winio/sd.go generated vendored Normal file
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// +build windows
package winio
import (
"syscall"
"unsafe"
)
//sys lookupAccountName(systemName *uint16, accountName string, sid *byte, sidSize *uint32, refDomain *uint16, refDomainSize *uint32, sidNameUse *uint32) (err error) = advapi32.LookupAccountNameW
//sys convertSidToStringSid(sid *byte, str **uint16) (err error) = advapi32.ConvertSidToStringSidW
//sys convertStringSecurityDescriptorToSecurityDescriptor(str string, revision uint32, sd *uintptr, size *uint32) (err error) = advapi32.ConvertStringSecurityDescriptorToSecurityDescriptorW
//sys convertSecurityDescriptorToStringSecurityDescriptor(sd *byte, revision uint32, secInfo uint32, sddl **uint16, sddlSize *uint32) (err error) = advapi32.ConvertSecurityDescriptorToStringSecurityDescriptorW
//sys localFree(mem uintptr) = LocalFree
//sys getSecurityDescriptorLength(sd uintptr) (len uint32) = advapi32.GetSecurityDescriptorLength
const (
cERROR_NONE_MAPPED = syscall.Errno(1332)
)
type AccountLookupError struct {
Name string
Err error
}
func (e *AccountLookupError) Error() string {
if e.Name == "" {
return "lookup account: empty account name specified"
}
var s string
switch e.Err {
case cERROR_NONE_MAPPED:
s = "not found"
default:
s = e.Err.Error()
}
return "lookup account " + e.Name + ": " + s
}
type SddlConversionError struct {
Sddl string
Err error
}
func (e *SddlConversionError) Error() string {
return "convert " + e.Sddl + ": " + e.Err.Error()
}
// LookupSidByName looks up the SID of an account by name
func LookupSidByName(name string) (sid string, err error) {
if name == "" {
return "", &AccountLookupError{name, cERROR_NONE_MAPPED}
}
var sidSize, sidNameUse, refDomainSize uint32
err = lookupAccountName(nil, name, nil, &sidSize, nil, &refDomainSize, &sidNameUse)
if err != nil && err != syscall.ERROR_INSUFFICIENT_BUFFER {
return "", &AccountLookupError{name, err}
}
sidBuffer := make([]byte, sidSize)
refDomainBuffer := make([]uint16, refDomainSize)
err = lookupAccountName(nil, name, &sidBuffer[0], &sidSize, &refDomainBuffer[0], &refDomainSize, &sidNameUse)
if err != nil {
return "", &AccountLookupError{name, err}
}
var strBuffer *uint16
err = convertSidToStringSid(&sidBuffer[0], &strBuffer)
if err != nil {
return "", &AccountLookupError{name, err}
}
sid = syscall.UTF16ToString((*[0xffff]uint16)(unsafe.Pointer(strBuffer))[:])
localFree(uintptr(unsafe.Pointer(strBuffer)))
return sid, nil
}
func SddlToSecurityDescriptor(sddl string) ([]byte, error) {
var sdBuffer uintptr
err := convertStringSecurityDescriptorToSecurityDescriptor(sddl, 1, &sdBuffer, nil)
if err != nil {
return nil, &SddlConversionError{sddl, err}
}
defer localFree(sdBuffer)
sd := make([]byte, getSecurityDescriptorLength(sdBuffer))
copy(sd, (*[0xffff]byte)(unsafe.Pointer(sdBuffer))[:len(sd)])
return sd, nil
}
func SecurityDescriptorToSddl(sd []byte) (string, error) {
var sddl *uint16
// The returned string length seems to including an aribtrary number of terminating NULs.
// Don't use it.
err := convertSecurityDescriptorToStringSecurityDescriptor(&sd[0], 1, 0xff, &sddl, nil)
if err != nil {
return "", err
}
defer localFree(uintptr(unsafe.Pointer(sddl)))
return syscall.UTF16ToString((*[0xffff]uint16)(unsafe.Pointer(sddl))[:]), nil
}

26
vendor/github.com/Microsoft/go-winio/sd_test.go generated vendored Normal file
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package winio
import "testing"
func TestLookupInvalidSid(t *testing.T) {
_, err := LookupSidByName(".\\weoifjdsklfj")
aerr, ok := err.(*AccountLookupError)
if !ok || aerr.Err != cERROR_NONE_MAPPED {
t.Fatalf("expected AccountLookupError with ERROR_NONE_MAPPED, got %s", err)
}
}
func TestLookupValidSid(t *testing.T) {
sid, err := LookupSidByName("Everyone")
if err != nil || sid != "S-1-1-0" {
t.Fatal("expected S-1-1-0, got %s, %s", sid, err)
}
}
func TestLookupEmptyNameFails(t *testing.T) {
_, err := LookupSidByName(".\\weoifjdsklfj")
aerr, ok := err.(*AccountLookupError)
if !ok || aerr.Err != cERROR_NONE_MAPPED {
t.Fatalf("expected AccountLookupError with ERROR_NONE_MAPPED, got %s", err)
}
}

3
vendor/github.com/Microsoft/go-winio/syscall.go generated vendored Normal file
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@ -0,0 +1,3 @@
package winio
//go:generate go run $GOROOT/src/syscall/mksyscall_windows.go -output zsyscall_windows.go file.go pipe.go sd.go fileinfo.go privilege.go backup.go

901
vendor/github.com/Microsoft/go-winio/vhd/mksyscall_windows.go generated vendored Normal file
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@ -0,0 +1,901 @@
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Hard-coding unicode mode for VHD library.
// +build ignore
/*
mksyscall_windows generates windows system call bodies
It parses all files specified on command line containing function
prototypes (like syscall_windows.go) and prints system call bodies
to standard output.
The prototypes are marked by lines beginning with "//sys" and read
like func declarations if //sys is replaced by func, but:
* The parameter lists must give a name for each argument. This
includes return parameters.
* The parameter lists must give a type for each argument:
the (x, y, z int) shorthand is not allowed.
* If the return parameter is an error number, it must be named err.
* If go func name needs to be different from it's winapi dll name,
the winapi name could be specified at the end, after "=" sign, like
//sys LoadLibrary(libname string) (handle uint32, err error) = LoadLibraryA
* Each function that returns err needs to supply a condition, that
return value of winapi will be tested against to detect failure.
This would set err to windows "last-error", otherwise it will be nil.
The value can be provided at end of //sys declaration, like
//sys LoadLibrary(libname string) (handle uint32, err error) [failretval==-1] = LoadLibraryA
and is [failretval==0] by default.
Usage:
mksyscall_windows [flags] [path ...]
The flags are:
-output
Specify output file name (outputs to console if blank).
-trace
Generate print statement after every syscall.
*/
package main
import (
"bufio"
"bytes"
"errors"
"flag"
"fmt"
"go/format"
"go/parser"
"go/token"
"io"
"io/ioutil"
"log"
"os"
"path/filepath"
"runtime"
"sort"
"strconv"
"strings"
"text/template"
)
var (
filename = flag.String("output", "", "output file name (standard output if omitted)")
printTraceFlag = flag.Bool("trace", false, "generate print statement after every syscall")
systemDLL = flag.Bool("systemdll", true, "whether all DLLs should be loaded from the Windows system directory")
)
func trim(s string) string {
return strings.Trim(s, " \t")
}
var packageName string
func packagename() string {
return packageName
}
func syscalldot() string {
if packageName == "syscall" {
return ""
}
return "syscall."
}
// Param is function parameter
type Param struct {
Name string
Type string
fn *Fn
tmpVarIdx int
}
// tmpVar returns temp variable name that will be used to represent p during syscall.
func (p *Param) tmpVar() string {
if p.tmpVarIdx < 0 {
p.tmpVarIdx = p.fn.curTmpVarIdx
p.fn.curTmpVarIdx++
}
return fmt.Sprintf("_p%d", p.tmpVarIdx)
}
// BoolTmpVarCode returns source code for bool temp variable.
func (p *Param) BoolTmpVarCode() string {
const code = `var %s uint32
if %s {
%s = 1
} else {
%s = 0
}`
tmp := p.tmpVar()
return fmt.Sprintf(code, tmp, p.Name, tmp, tmp)
}
// SliceTmpVarCode returns source code for slice temp variable.
func (p *Param) SliceTmpVarCode() string {
const code = `var %s *%s
if len(%s) > 0 {
%s = &%s[0]
}`
tmp := p.tmpVar()
return fmt.Sprintf(code, tmp, p.Type[2:], p.Name, tmp, p.Name)
}
// StringTmpVarCode returns source code for string temp variable.
func (p *Param) StringTmpVarCode() string {
errvar := p.fn.Rets.ErrorVarName()
if errvar == "" {
errvar = "_"
}
tmp := p.tmpVar()
const code = `var %s %s
%s, %s = %s(%s)`
s := fmt.Sprintf(code, tmp, p.fn.StrconvType(), tmp, errvar, p.fn.StrconvFunc(), p.Name)
if errvar == "-" {
return s
}
const morecode = `
if %s != nil {
return
}`
return s + fmt.Sprintf(morecode, errvar)
}
// TmpVarCode returns source code for temp variable.
func (p *Param) TmpVarCode() string {
switch {
case p.Type == "bool":
return p.BoolTmpVarCode()
case strings.HasPrefix(p.Type, "[]"):
return p.SliceTmpVarCode()
default:
return ""
}
}
// TmpVarHelperCode returns source code for helper's temp variable.
func (p *Param) TmpVarHelperCode() string {
if p.Type != "string" {
return ""
}
return p.StringTmpVarCode()
}
// SyscallArgList returns source code fragments representing p parameter
// in syscall. Slices are translated into 2 syscall parameters: pointer to
// the first element and length.
func (p *Param) SyscallArgList() []string {
t := p.HelperType()
var s string
switch {
case t[0] == '*':
s = fmt.Sprintf("unsafe.Pointer(%s)", p.Name)
case t == "bool":
s = p.tmpVar()
case strings.HasPrefix(t, "[]"):
return []string{
fmt.Sprintf("uintptr(unsafe.Pointer(%s))", p.tmpVar()),
fmt.Sprintf("uintptr(len(%s))", p.Name),
}
default:
s = p.Name
}
return []string{fmt.Sprintf("uintptr(%s)", s)}
}
// IsError determines if p parameter is used to return error.
func (p *Param) IsError() bool {
return p.Name == "err" && p.Type == "error"
}
// HelperType returns type of parameter p used in helper function.
func (p *Param) HelperType() string {
if p.Type == "string" {
return p.fn.StrconvType()
}
return p.Type
}
// join concatenates parameters ps into a string with sep separator.
// Each parameter is converted into string by applying fn to it
// before conversion.
func join(ps []*Param, fn func(*Param) string, sep string) string {
if len(ps) == 0 {
return ""
}
a := make([]string, 0)
for _, p := range ps {
a = append(a, fn(p))
}
return strings.Join(a, sep)
}
// Rets describes function return parameters.
type Rets struct {
Name string
Type string
ReturnsError bool
FailCond string
}
// ErrorVarName returns error variable name for r.
func (r *Rets) ErrorVarName() string {
if r.ReturnsError {
return "err"
}
if r.Type == "error" {
return r.Name
}
return ""
}
// ToParams converts r into slice of *Param.
func (r *Rets) ToParams() []*Param {
ps := make([]*Param, 0)
if len(r.Name) > 0 {
ps = append(ps, &Param{Name: r.Name, Type: r.Type})
}
if r.ReturnsError {
ps = append(ps, &Param{Name: "err", Type: "error"})
}
return ps
}
// List returns source code of syscall return parameters.
func (r *Rets) List() string {
s := join(r.ToParams(), func(p *Param) string { return p.Name + " " + p.Type }, ", ")
if len(s) > 0 {
s = "(" + s + ")"
}
return s
}
// PrintList returns source code of trace printing part correspondent
// to syscall return values.
func (r *Rets) PrintList() string {
return join(r.ToParams(), func(p *Param) string { return fmt.Sprintf(`"%s=", %s, `, p.Name, p.Name) }, `", ", `)
}
// SetReturnValuesCode returns source code that accepts syscall return values.
func (r *Rets) SetReturnValuesCode() string {
if r.Name == "" && !r.ReturnsError {
return ""
}
retvar := "r0"
if r.Name == "" {
retvar = "r1"
}
errvar := "_"
if r.ReturnsError {
errvar = "e1"
}
return fmt.Sprintf("%s, _, %s := ", retvar, errvar)
}
func (r *Rets) useLongHandleErrorCode(retvar string) string {
const code = `if %s {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = %sEINVAL
}
}`
cond := retvar + " == 0"
if r.FailCond != "" {
cond = strings.Replace(r.FailCond, "failretval", retvar, 1)
}
return fmt.Sprintf(code, cond, syscalldot())
}
// SetErrorCode returns source code that sets return parameters.
func (r *Rets) SetErrorCode() string {
const code = `if r0 != 0 {
%s = %sErrno(r0)
}`
if r.Name == "" && !r.ReturnsError {
return ""
}
if r.Name == "" {
return r.useLongHandleErrorCode("r1")
}
if r.Type == "error" {
return fmt.Sprintf(code, r.Name, syscalldot())
}
s := ""
switch {
case r.Type[0] == '*':
s = fmt.Sprintf("%s = (%s)(unsafe.Pointer(r0))", r.Name, r.Type)
case r.Type == "bool":
s = fmt.Sprintf("%s = r0 != 0", r.Name)
default:
s = fmt.Sprintf("%s = %s(r0)", r.Name, r.Type)
}
if !r.ReturnsError {
return s
}
return s + "\n\t" + r.useLongHandleErrorCode(r.Name)
}
// Fn describes syscall function.
type Fn struct {
Name string
Params []*Param
Rets *Rets
PrintTrace bool
dllname string
dllfuncname string
src string
// TODO: get rid of this field and just use parameter index instead
curTmpVarIdx int // insure tmp variables have uniq names
}
// extractParams parses s to extract function parameters.
func extractParams(s string, f *Fn) ([]*Param, error) {
s = trim(s)
if s == "" {
return nil, nil
}
a := strings.Split(s, ",")
ps := make([]*Param, len(a))
for i := range ps {
s2 := trim(a[i])
b := strings.Split(s2, " ")
if len(b) != 2 {
b = strings.Split(s2, "\t")
if len(b) != 2 {
return nil, errors.New("Could not extract function parameter from \"" + s2 + "\"")
}
}
ps[i] = &Param{
Name: trim(b[0]),
Type: trim(b[1]),
fn: f,
tmpVarIdx: -1,
}
}
return ps, nil
}
// extractSection extracts text out of string s starting after start
// and ending just before end. found return value will indicate success,
// and prefix, body and suffix will contain correspondent parts of string s.
func extractSection(s string, start, end rune) (prefix, body, suffix string, found bool) {
s = trim(s)
if strings.HasPrefix(s, string(start)) {
// no prefix
body = s[1:]
} else {
a := strings.SplitN(s, string(start), 2)
if len(a) != 2 {
return "", "", s, false
}
prefix = a[0]
body = a[1]
}
a := strings.SplitN(body, string(end), 2)
if len(a) != 2 {
return "", "", "", false
}
return prefix, a[0], a[1], true
}
// newFn parses string s and return created function Fn.
func newFn(s string) (*Fn, error) {
s = trim(s)
f := &Fn{
Rets: &Rets{},
src: s,
PrintTrace: *printTraceFlag,
}
// function name and args
prefix, body, s, found := extractSection(s, '(', ')')
if !found || prefix == "" {
return nil, errors.New("Could not extract function name and parameters from \"" + f.src + "\"")
}
f.Name = prefix
var err error
f.Params, err = extractParams(body, f)
if err != nil {
return nil, err
}
// return values
_, body, s, found = extractSection(s, '(', ')')
if found {
r, err := extractParams(body, f)
if err != nil {
return nil, err
}
switch len(r) {
case 0:
case 1:
if r[0].IsError() {
f.Rets.ReturnsError = true
} else {
f.Rets.Name = r[0].Name
f.Rets.Type = r[0].Type
}
case 2:
if !r[1].IsError() {
return nil, errors.New("Only last windows error is allowed as second return value in \"" + f.src + "\"")
}
f.Rets.ReturnsError = true
f.Rets.Name = r[0].Name
f.Rets.Type = r[0].Type
default:
return nil, errors.New("Too many return values in \"" + f.src + "\"")
}
}
// fail condition
_, body, s, found = extractSection(s, '[', ']')
if found {
f.Rets.FailCond = body
}
// dll and dll function names
s = trim(s)
if s == "" {
return f, nil
}
if !strings.HasPrefix(s, "=") {
return nil, errors.New("Could not extract dll name from \"" + f.src + "\"")
}
s = trim(s[1:])
a := strings.Split(s, ".")
switch len(a) {
case 1:
f.dllfuncname = a[0]
case 2:
f.dllname = a[0]
f.dllfuncname = a[1]
default:
return nil, errors.New("Could not extract dll name from \"" + f.src + "\"")
}
return f, nil
}
// DLLName returns DLL name for function f.
func (f *Fn) DLLName() string {
if f.dllname == "" {
return "kernel32"
}
return f.dllname
}
// DLLName returns DLL function name for function f.
func (f *Fn) DLLFuncName() string {
if f.dllfuncname == "" {
return f.Name
}
return f.dllfuncname
}
// ParamList returns source code for function f parameters.
func (f *Fn) ParamList() string {
return join(f.Params, func(p *Param) string { return p.Name + " " + p.Type }, ", ")
}
// HelperParamList returns source code for helper function f parameters.
func (f *Fn) HelperParamList() string {
return join(f.Params, func(p *Param) string { return p.Name + " " + p.HelperType() }, ", ")
}
// ParamPrintList returns source code of trace printing part correspondent
// to syscall input parameters.
func (f *Fn) ParamPrintList() string {
return join(f.Params, func(p *Param) string { return fmt.Sprintf(`"%s=", %s, `, p.Name, p.Name) }, `", ", `)
}
// ParamCount return number of syscall parameters for function f.
func (f *Fn) ParamCount() int {
n := 0
for _, p := range f.Params {
n += len(p.SyscallArgList())
}
return n
}
// SyscallParamCount determines which version of Syscall/Syscall6/Syscall9/...
// to use. It returns parameter count for correspondent SyscallX function.
func (f *Fn) SyscallParamCount() int {
n := f.ParamCount()
switch {
case n <= 3:
return 3
case n <= 6:
return 6
case n <= 9:
return 9
case n <= 12:
return 12
case n <= 15:
return 15
default:
panic("too many arguments to system call")
}
}
// Syscall determines which SyscallX function to use for function f.
func (f *Fn) Syscall() string {
c := f.SyscallParamCount()
if c == 3 {
return syscalldot() + "Syscall"
}
return syscalldot() + "Syscall" + strconv.Itoa(c)
}
// SyscallParamList returns source code for SyscallX parameters for function f.
func (f *Fn) SyscallParamList() string {
a := make([]string, 0)
for _, p := range f.Params {
a = append(a, p.SyscallArgList()...)
}
for len(a) < f.SyscallParamCount() {
a = append(a, "0")
}
return strings.Join(a, ", ")
}
// HelperCallParamList returns source code of call into function f helper.
func (f *Fn) HelperCallParamList() string {
a := make([]string, 0, len(f.Params))
for _, p := range f.Params {
s := p.Name
if p.Type == "string" {
s = p.tmpVar()
}
a = append(a, s)
}
return strings.Join(a, ", ")
}
// IsUTF16 is true, if f is W (utf16) function. It is false
// for all A (ascii) functions.
func (f *Fn) IsUTF16() bool {
return true
}
// StrconvFunc returns name of Go string to OS string function for f.
func (f *Fn) StrconvFunc() string {
if f.IsUTF16() {
return syscalldot() + "UTF16PtrFromString"
}
return syscalldot() + "BytePtrFromString"
}
// StrconvType returns Go type name used for OS string for f.
func (f *Fn) StrconvType() string {
if f.IsUTF16() {
return "*uint16"
}
return "*byte"
}
// HasStringParam is true, if f has at least one string parameter.
// Otherwise it is false.
func (f *Fn) HasStringParam() bool {
for _, p := range f.Params {
if p.Type == "string" {
return true
}
}
return false
}
// HelperName returns name of function f helper.
func (f *Fn) HelperName() string {
if !f.HasStringParam() {
return f.Name
}
return "_" + f.Name
}
// Source files and functions.
type Source struct {
Funcs []*Fn
Files []string
StdLibImports []string
ExternalImports []string
}
func (src *Source) Import(pkg string) {
src.StdLibImports = append(src.StdLibImports, pkg)
sort.Strings(src.StdLibImports)
}
func (src *Source) ExternalImport(pkg string) {
src.ExternalImports = append(src.ExternalImports, pkg)
sort.Strings(src.ExternalImports)
}
// ParseFiles parses files listed in fs and extracts all syscall
// functions listed in sys comments. It returns source files
// and functions collection *Source if successful.
func ParseFiles(fs []string) (*Source, error) {
src := &Source{
Funcs: make([]*Fn, 0),
Files: make([]string, 0),
StdLibImports: []string{
"unsafe",
},
ExternalImports: make([]string, 0),
}
for _, file := range fs {
if err := src.ParseFile(file); err != nil {
return nil, err
}
}
return src, nil
}
// DLLs return dll names for a source set src.
func (src *Source) DLLs() []string {
uniq := make(map[string]bool)
r := make([]string, 0)
for _, f := range src.Funcs {
name := f.DLLName()
if _, found := uniq[name]; !found {
uniq[name] = true
r = append(r, name)
}
}
return r
}
// ParseFile adds additional file path to a source set src.
func (src *Source) ParseFile(path string) error {
file, err := os.Open(path)
if err != nil {
return err
}
defer file.Close()
s := bufio.NewScanner(file)
for s.Scan() {
t := trim(s.Text())
if len(t) < 7 {
continue
}
if !strings.HasPrefix(t, "//sys") {
continue
}
t = t[5:]
if !(t[0] == ' ' || t[0] == '\t') {
continue
}
f, err := newFn(t[1:])
if err != nil {
return err
}
src.Funcs = append(src.Funcs, f)
}
if err := s.Err(); err != nil {
return err
}
src.Files = append(src.Files, path)
// get package name
fset := token.NewFileSet()
_, err = file.Seek(0, 0)
if err != nil {
return err
}
pkg, err := parser.ParseFile(fset, "", file, parser.PackageClauseOnly)
if err != nil {
return err
}
packageName = pkg.Name.Name
return nil
}
// IsStdRepo returns true if src is part of standard library.
func (src *Source) IsStdRepo() (bool, error) {
if len(src.Files) == 0 {
return false, errors.New("no input files provided")
}
abspath, err := filepath.Abs(src.Files[0])
if err != nil {
return false, err
}
goroot := runtime.GOROOT()
if runtime.GOOS == "windows" {
abspath = strings.ToLower(abspath)
goroot = strings.ToLower(goroot)
}
sep := string(os.PathSeparator)
if !strings.HasSuffix(goroot, sep) {
goroot += sep
}
return strings.HasPrefix(abspath, goroot), nil
}
// Generate output source file from a source set src.
func (src *Source) Generate(w io.Writer) error {
const (
pkgStd = iota // any package in std library
pkgXSysWindows // x/sys/windows package
pkgOther
)
isStdRepo, err := src.IsStdRepo()
if err != nil {
return err
}
var pkgtype int
switch {
case isStdRepo:
pkgtype = pkgStd
case packageName == "windows":
// TODO: this needs better logic than just using package name
pkgtype = pkgXSysWindows
default:
pkgtype = pkgOther
}
if *systemDLL {
switch pkgtype {
case pkgStd:
src.Import("internal/syscall/windows/sysdll")
case pkgXSysWindows:
default:
src.ExternalImport("golang.org/x/sys/windows")
}
}
if packageName != "syscall" {
src.Import("syscall")
}
funcMap := template.FuncMap{
"packagename": packagename,
"syscalldot": syscalldot,
"newlazydll": func(dll string) string {
arg := "\"" + dll + ".dll\""
if !*systemDLL {
return syscalldot() + "NewLazyDLL(" + arg + ")"
}
switch pkgtype {
case pkgStd:
return syscalldot() + "NewLazyDLL(sysdll.Add(" + arg + "))"
case pkgXSysWindows:
return "NewLazySystemDLL(" + arg + ")"
default:
return "windows.NewLazySystemDLL(" + arg + ")"
}
},
}
t := template.Must(template.New("main").Funcs(funcMap).Parse(srcTemplate))
err = t.Execute(w, src)
if err != nil {
return errors.New("Failed to execute template: " + err.Error())
}
return nil
}
func usage() {
fmt.Fprintf(os.Stderr, "usage: mksyscall_windows [flags] [path ...]\n")
flag.PrintDefaults()
os.Exit(1)
}
func main() {
flag.Usage = usage
flag.Parse()
if len(flag.Args()) <= 0 {
fmt.Fprintf(os.Stderr, "no files to parse provided\n")
usage()
}
src, err := ParseFiles(flag.Args())
if err != nil {
log.Fatal(err)
}
var buf bytes.Buffer
if err := src.Generate(&buf); err != nil {
log.Fatal(err)
}
data, err := format.Source(buf.Bytes())
if err != nil {
log.Fatal(err)
}
if *filename == "" {
_, err = os.Stdout.Write(data)
} else {
err = ioutil.WriteFile(*filename, data, 0644)
}
if err != nil {
log.Fatal(err)
}
}
// TODO: use println instead to print in the following template
const srcTemplate = `
{{define "main"}}// MACHINE GENERATED BY 'go generate' COMMAND; DO NOT EDIT
package {{packagename}}
import (
{{range .StdLibImports}}"{{.}}"
{{end}}
{{range .ExternalImports}}"{{.}}"
{{end}}
)
var _ unsafe.Pointer
// Do the interface allocations only once for common
// Errno values.
const (
errnoERROR_IO_PENDING = 997
)
var (
errERROR_IO_PENDING error = {{syscalldot}}Errno(errnoERROR_IO_PENDING)
)
// errnoErr returns common boxed Errno values, to prevent
// allocations at runtime.
func errnoErr(e {{syscalldot}}Errno) error {
switch e {
case 0:
return nil
case errnoERROR_IO_PENDING:
return errERROR_IO_PENDING
}
// TODO: add more here, after collecting data on the common
// error values see on Windows. (perhaps when running
// all.bat?)
return e
}
var (
{{template "dlls" .}}
{{template "funcnames" .}})
{{range .Funcs}}{{if .HasStringParam}}{{template "helperbody" .}}{{end}}{{template "funcbody" .}}{{end}}
{{end}}
{{/* help functions */}}
{{define "dlls"}}{{range .DLLs}} mod{{.}} = {{newlazydll .}}
{{end}}{{end}}
{{define "funcnames"}}{{range .Funcs}} proc{{.DLLFuncName}} = mod{{.DLLName}}.NewProc("{{.DLLFuncName}}")
{{end}}{{end}}
{{define "helperbody"}}
func {{.Name}}({{.ParamList}}) {{template "results" .}}{
{{template "helpertmpvars" .}} return {{.HelperName}}({{.HelperCallParamList}})
}
{{end}}
{{define "funcbody"}}
func {{.HelperName}}({{.HelperParamList}}) {{template "results" .}}{
{{template "tmpvars" .}} {{template "syscall" .}}
{{template "seterror" .}}{{template "printtrace" .}} return
}
{{end}}
{{define "helpertmpvars"}}{{range .Params}}{{if .TmpVarHelperCode}} {{.TmpVarHelperCode}}
{{end}}{{end}}{{end}}
{{define "tmpvars"}}{{range .Params}}{{if .TmpVarCode}} {{.TmpVarCode}}
{{end}}{{end}}{{end}}
{{define "results"}}{{if .Rets.List}}{{.Rets.List}} {{end}}{{end}}
{{define "syscall"}}{{.Rets.SetReturnValuesCode}}{{.Syscall}}(proc{{.DLLFuncName}}.Addr(), {{.ParamCount}}, {{.SyscallParamList}}){{end}}
{{define "seterror"}}{{if .Rets.SetErrorCode}} {{.Rets.SetErrorCode}}
{{end}}{{end}}
{{define "printtrace"}}{{if .PrintTrace}} print("SYSCALL: {{.Name}}(", {{.ParamPrintList}}") (", {{.Rets.PrintList}}")\n")
{{end}}{{end}}
`

82
vendor/github.com/Microsoft/go-winio/vhd/vhd.go generated vendored Normal file
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@ -0,0 +1,82 @@
// +build windows
package vhd
import "syscall"
//go:generate go run mksyscall_windows.go -output zvhd.go vhd.go
//sys createVirtualDisk(virtualStorageType *virtualStorageType, path string, virtualDiskAccessMask uint32, securityDescriptor *uintptr, flags uint32, providerSpecificFlags uint32, parameters *createVirtualDiskParameters, o *syscall.Overlapped, handle *syscall.Handle) (err error) [failretval != 0] = VirtDisk.CreateVirtualDisk
type virtualStorageType struct {
DeviceID uint32
VendorID [16]byte
}
const virtualDiskAccessNONE uint32 = 0
const virtualDiskAccessATTACHRO uint32 = 65536
const virtualDiskAccessATTACHRW uint32 = 131072
const virtualDiskAccessDETACH uint32 = 262144
const virtualDiskAccessGETINFO uint32 = 524288
const virtualDiskAccessCREATE uint32 = 1048576
const virtualDiskAccessMETAOPS uint32 = 2097152
const virtualDiskAccessREAD uint32 = 851968
const virtualDiskAccessALL uint32 = 4128768
const virtualDiskAccessWRITABLE uint32 = 3276800
const createVirtualDiskFlagNone uint32 = 0
const createVirtualDiskFlagFullPhysicalAllocation uint32 = 1
const createVirtualDiskFlagPreventWritesToSourceDisk uint32 = 2
const createVirtualDiskFlagDoNotCopyMetadataFromParent uint32 = 4
type version2 struct {
UniqueID [16]byte // GUID
MaximumSize uint64
BlockSizeInBytes uint32
SectorSizeInBytes uint32
ParentPath *uint16 // string
SourcePath *uint16 // string
OpenFlags uint32
ParentVirtualStorageType virtualStorageType
SourceVirtualStorageType virtualStorageType
ResiliencyGUID [16]byte // GUID
}
type createVirtualDiskParameters struct {
Version uint32 // Must always be set to 2
Version2 version2
}
// CreateVhdx will create a simple vhdx file at the given path using default values.
func CreateVhdx(path string, maxSizeInGb, blockSizeInMb uint32) error {
var defaultType virtualStorageType
parameters := createVirtualDiskParameters{
Version: 2,
Version2: version2{
MaximumSize: uint64(maxSizeInGb) * 1024 * 1024 * 1024,
BlockSizeInBytes: blockSizeInMb * 1024 * 1024,
},
}
var handle syscall.Handle
if err := createVirtualDisk(
&defaultType,
path,
virtualDiskAccessNONE,
nil,
createVirtualDiskFlagNone,
0,
&parameters,
nil,
&handle); err != nil {
return err
}
if err := syscall.CloseHandle(handle); err != nil {
return err
}
return nil
}

64
vendor/github.com/Microsoft/go-winio/vhd/zvhd.go generated vendored Normal file
View file

@ -0,0 +1,64 @@
// MACHINE GENERATED BY 'go generate' COMMAND; DO NOT EDIT
package vhd
import (
"syscall"
"unsafe"
"golang.org/x/sys/windows"
)
var _ unsafe.Pointer
// Do the interface allocations only once for common
// Errno values.
const (
errnoERROR_IO_PENDING = 997
)
var (
errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING)
)
// errnoErr returns common boxed Errno values, to prevent
// allocations at runtime.
func errnoErr(e syscall.Errno) error {
switch e {
case 0:
return nil
case errnoERROR_IO_PENDING:
return errERROR_IO_PENDING
}
// TODO: add more here, after collecting data on the common
// error values see on Windows. (perhaps when running
// all.bat?)
return e
}
var (
modVirtDisk = windows.NewLazySystemDLL("VirtDisk.dll")
procCreateVirtualDisk = modVirtDisk.NewProc("CreateVirtualDisk")
)
func createVirtualDisk(virtualStorageType *virtualStorageType, path string, virtualDiskAccessMask uint32, securityDescriptor *uintptr, flags uint32, providerSpecificFlags uint32, parameters *createVirtualDiskParameters, o *syscall.Overlapped, handle *syscall.Handle) (err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(path)
if err != nil {
return
}
return _createVirtualDisk(virtualStorageType, _p0, virtualDiskAccessMask, securityDescriptor, flags, providerSpecificFlags, parameters, o, handle)
}
func _createVirtualDisk(virtualStorageType *virtualStorageType, path *uint16, virtualDiskAccessMask uint32, securityDescriptor *uintptr, flags uint32, providerSpecificFlags uint32, parameters *createVirtualDiskParameters, o *syscall.Overlapped, handle *syscall.Handle) (err error) {
r1, _, e1 := syscall.Syscall9(procCreateVirtualDisk.Addr(), 9, uintptr(unsafe.Pointer(virtualStorageType)), uintptr(unsafe.Pointer(path)), uintptr(virtualDiskAccessMask), uintptr(unsafe.Pointer(securityDescriptor)), uintptr(flags), uintptr(providerSpecificFlags), uintptr(unsafe.Pointer(parameters)), uintptr(unsafe.Pointer(o)), uintptr(unsafe.Pointer(handle)))
if r1 != 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}

138
vendor/github.com/Microsoft/go-winio/wim/decompress.go generated vendored Normal file
View file

@ -0,0 +1,138 @@
package wim
import (
"encoding/binary"
"io"
"io/ioutil"
"github.com/Microsoft/go-winio/wim/lzx"
)
const chunkSize = 32768 // Compressed resource chunk size
type compressedReader struct {
r *io.SectionReader
d io.ReadCloser
chunks []int64
curChunk int
originalSize int64
}
func newCompressedReader(r *io.SectionReader, originalSize int64, offset int64) (*compressedReader, error) {
nchunks := (originalSize + chunkSize - 1) / chunkSize
var base int64
chunks := make([]int64, nchunks)
if originalSize <= 0xffffffff {
// 32-bit chunk offsets
base = (nchunks - 1) * 4
chunks32 := make([]uint32, nchunks-1)
err := binary.Read(r, binary.LittleEndian, chunks32)
if err != nil {
return nil, err
}
for i, n := range chunks32 {
chunks[i+1] = int64(n)
}
} else {
// 64-bit chunk offsets
base = (nchunks - 1) * 8
err := binary.Read(r, binary.LittleEndian, chunks[1:])
if err != nil {
return nil, err
}
}
for i, c := range chunks {
chunks[i] = c + base
}
cr := &compressedReader{
r: r,
chunks: chunks,
originalSize: originalSize,
}
err := cr.reset(int(offset / chunkSize))
if err != nil {
return nil, err
}
suboff := offset % chunkSize
if suboff != 0 {
_, err := io.CopyN(ioutil.Discard, cr.d, suboff)
if err != nil {
return nil, err
}
}
return cr, nil
}
func (r *compressedReader) chunkOffset(n int) int64 {
if n == len(r.chunks) {
return r.r.Size()
}
return r.chunks[n]
}
func (r *compressedReader) chunkSize(n int) int {
return int(r.chunkOffset(n+1) - r.chunkOffset(n))
}
func (r *compressedReader) uncompressedSize(n int) int {
if n < len(r.chunks)-1 {
return chunkSize
}
size := int(r.originalSize % chunkSize)
if size == 0 {
size = chunkSize
}
return size
}
func (r *compressedReader) reset(n int) error {
if n >= len(r.chunks) {
return io.EOF
}
if r.d != nil {
r.d.Close()
}
r.curChunk = n
size := r.chunkSize(n)
uncompressedSize := r.uncompressedSize(n)
section := io.NewSectionReader(r.r, r.chunkOffset(n), int64(size))
if size != uncompressedSize {
d, err := lzx.NewReader(section, uncompressedSize)
if err != nil {
return err
}
r.d = d
} else {
r.d = ioutil.NopCloser(section)
}
return nil
}
func (r *compressedReader) Read(b []byte) (int, error) {
for {
n, err := r.d.Read(b)
if err != io.EOF {
return n, err
}
err = r.reset(r.curChunk + 1)
if err != nil {
return n, err
}
}
}
func (r *compressedReader) Close() error {
var err error
if r.d != nil {
err = r.d.Close()
r.d = nil
}
return err
}

606
vendor/github.com/Microsoft/go-winio/wim/lzx/lzx.go generated vendored Normal file
View file

@ -0,0 +1,606 @@
// Package lzx implements a decompressor for the the WIM variant of the
// LZX compression algorithm.
//
// The LZX algorithm is an earlier variant of LZX DELTA, which is documented
// at https://msdn.microsoft.com/en-us/library/cc483133(v=exchg.80).aspx.
package lzx
import (
"bytes"
"encoding/binary"
"errors"
"io"
)
const (
maincodecount = 496
maincodesplit = 256
lencodecount = 249
lenshift = 9
codemask = 0x1ff
tablebits = 9
tablesize = 1 << tablebits
maxBlockSize = 32768
windowSize = 32768
maxTreePathLen = 16
e8filesize = 12000000
maxe8offset = 0x3fffffff
verbatimBlock = 1
alignedOffsetBlock = 2
uncompressedBlock = 3
)
var footerBits = [...]byte{
0, 0, 0, 0, 1, 1, 2, 2,
3, 3, 4, 4, 5, 5, 6, 6,
7, 7, 8, 8, 9, 9, 10, 10,
11, 11, 12, 12, 13, 13, 14,
}
var basePosition = [...]uint16{
0, 1, 2, 3, 4, 6, 8, 12,
16, 24, 32, 48, 64, 96, 128, 192,
256, 384, 512, 768, 1024, 1536, 2048, 3072,
4096, 6144, 8192, 12288, 16384, 24576, 32768,
}
var (
errCorrupt = errors.New("LZX data corrupt")
)
// Reader is an interface used by the decompressor to access
// the input stream. If the provided io.Reader does not implement
// Reader, then a bufio.Reader is used.
type Reader interface {
io.Reader
io.ByteReader
}
type decompressor struct {
r io.Reader
err error
unaligned bool
nbits byte
c uint32
lru [3]uint16
uncompressed int
windowReader *bytes.Reader
mainlens [maincodecount]byte
lenlens [lencodecount]byte
window [windowSize]byte
b []byte
bv int
bo int
}
//go:noinline
func (f *decompressor) fail(err error) {
if f.err == nil {
f.err = err
}
f.bo = 0
f.bv = 0
}
func (f *decompressor) ensureAtLeast(n int) error {
if f.bv-f.bo >= n {
return nil
}
if f.err != nil {
return f.err
}
if f.bv != f.bo {
copy(f.b[:f.bv-f.bo], f.b[f.bo:f.bv])
}
n, err := io.ReadAtLeast(f.r, f.b[f.bv-f.bo:], n)
if err != nil {
if err == io.EOF {
err = io.ErrUnexpectedEOF
} else {
f.fail(err)
}
return err
}
f.bv = f.bv - f.bo + n
f.bo = 0
return nil
}
// feed retrieves another 16-bit word from the stream and consumes
// it into f.c. It returns false if there are no more bytes available.
// Otherwise, on error, it sets f.err.
func (f *decompressor) feed() bool {
err := f.ensureAtLeast(2)
if err != nil {
if err == io.ErrUnexpectedEOF {
return false
}
}
f.c |= (uint32(f.b[f.bo+1])<<8 | uint32(f.b[f.bo])) << (16 - f.nbits)
f.nbits += 16
f.bo += 2
return true
}
// getBits retrieves the next n bits from the byte stream. n
// must be <= 16. It sets f.err on error.
func (f *decompressor) getBits(n byte) uint16 {
if f.nbits < n {
if !f.feed() {
f.fail(io.ErrUnexpectedEOF)
}
}
c := uint16(f.c >> (32 - n))
f.c <<= n
f.nbits -= n
return c
}
type huffman struct {
extra [][]uint16
maxbits byte
table [tablesize]uint16
}
// buildTable builds a huffman decoding table from a slice of code lengths,
// one per code, in order. Each code length must be <= maxTreePathLen.
// See https://en.wikipedia.org/wiki/Canonical_Huffman_code.
func buildTable(codelens []byte) *huffman {
// Determine the number of codes of each length, and the
// maximum length.
var count [maxTreePathLen + 1]uint
var max byte
for _, cl := range codelens {
count[cl]++
if max < cl {
max = cl
}
}
if max == 0 {
return &huffman{}
}
// Determine the first code of each length.
var first [maxTreePathLen + 1]uint
code := uint(0)
for i := byte(1); i <= max; i++ {
code <<= 1
first[i] = code
code += count[i]
}
if code != 1<<max {
return nil
}
// Build a table for code lookup. For code sizes < max,
// put all possible suffixes for the code into the table, too.
// For max > tablebits, split long codes into additional tables
// of suffixes of max-tablebits length.
h := &huffman{maxbits: max}
if max > tablebits {
core := first[tablebits+1] / 2 // Number of codes that fit without extra tables
nextra := 1<<tablebits - core // Number of extra entries
h.extra = make([][]uint16, nextra)
for code := core; code < 1<<tablebits; code++ {
h.table[code] = uint16(code - core)
h.extra[code-core] = make([]uint16, 1<<(max-tablebits))
}
}
for i, cl := range codelens {
if cl != 0 {
code := first[cl]
first[cl]++
v := uint16(cl)<<lenshift | uint16(i)
if cl <= tablebits {
extendedCode := code << (tablebits - cl)
for j := uint(0); j < 1<<(tablebits-cl); j++ {
h.table[extendedCode+j] = v
}
} else {
prefix := code >> (cl - tablebits)
suffix := code & (1<<(cl-tablebits) - 1)
extendedCode := suffix << (max - cl)
for j := uint(0); j < 1<<(max-cl); j++ {
h.extra[h.table[prefix]][extendedCode+j] = v
}
}
}
}
return h
}
// getCode retrieves the next code using the provided
// huffman tree. It sets f.err on error.
func (f *decompressor) getCode(h *huffman) uint16 {
if h.maxbits > 0 {
if f.nbits < maxTreePathLen {
f.feed()
}
// For codes with length < tablebits, it doesn't matter
// what the remainder of the bits used for table lookup
// are, since entries with all possible suffixes were
// added to the table.
c := h.table[f.c>>(32-tablebits)]
if c >= 1<<lenshift {
// The code is already in c.
} else {
c = h.extra[c][f.c<<tablebits>>(32-(h.maxbits-tablebits))]
}
n := byte(c >> lenshift)
if f.nbits >= n {
// Only consume the length of the code, not the maximum
// code length.
f.c <<= n
f.nbits -= n
return c & codemask
}
f.fail(io.ErrUnexpectedEOF)
return 0
}
// This is an empty tree. It should not be used.
f.fail(errCorrupt)
return 0
}
// readTree updates the huffman tree path lengths in lens by
// reading and decoding lengths from the byte stream. lens
// should be prepopulated with the previous block's tree's path
// lengths. For the first block, lens should be zero.
func (f *decompressor) readTree(lens []byte) error {
// Get the pre-tree for the main tree.
var pretreeLen [20]byte
for i := range pretreeLen {
pretreeLen[i] = byte(f.getBits(4))
}
if f.err != nil {
return f.err
}
h := buildTable(pretreeLen[:])
// The lengths are encoded as a series of huffman codes
// encoded by the pre-tree.
for i := 0; i < len(lens); {
c := byte(f.getCode(h))
if f.err != nil {
return f.err
}
switch {
case c <= 16: // length is delta from previous length
lens[i] = (lens[i] + 17 - c) % 17
i++
case c == 17: // next n + 4 lengths are zero
zeroes := int(f.getBits(4)) + 4
if i+zeroes > len(lens) {
return errCorrupt
}
for j := 0; j < zeroes; j++ {
lens[i+j] = 0
}
i += zeroes
case c == 18: // next n + 20 lengths are zero
zeroes := int(f.getBits(5)) + 20
if i+zeroes > len(lens) {
return errCorrupt
}
for j := 0; j < zeroes; j++ {
lens[i+j] = 0
}
i += zeroes
case c == 19: // next n + 4 lengths all have the same value
same := int(f.getBits(1)) + 4
if i+same > len(lens) {
return errCorrupt
}
c = byte(f.getCode(h))
if c > 16 {
return errCorrupt
}
l := (lens[i] + 17 - c) % 17
for j := 0; j < same; j++ {
lens[i+j] = l
}
i += same
default:
return errCorrupt
}
}
if f.err != nil {
return f.err
}
return nil
}
func (f *decompressor) readBlockHeader() (byte, uint16, error) {
// If the previous block was an unaligned uncompressed block, restore
// 2-byte alignment.
if f.unaligned {
err := f.ensureAtLeast(1)
if err != nil {
return 0, 0, err
}
f.bo++
f.unaligned = false
}
blockType := f.getBits(3)
full := f.getBits(1)
var blockSize uint16
if full != 0 {
blockSize = maxBlockSize
} else {
blockSize = f.getBits(16)
if blockSize > maxBlockSize {
return 0, 0, errCorrupt
}
}
if f.err != nil {
return 0, 0, f.err
}
switch blockType {
case verbatimBlock, alignedOffsetBlock:
// The caller will read the huffman trees.
case uncompressedBlock:
if f.nbits > 16 {
panic("impossible: more than one 16-bit word remains")
}
// Drop the remaining bits in the current 16-bit word
// If there are no bits left, discard a full 16-bit word.
n := f.nbits
if n == 0 {
n = 16
}
f.getBits(n)
// Read the LRU values for the next block.
err := f.ensureAtLeast(12)
if err != nil {
return 0, 0, err
}
f.lru[0] = uint16(binary.LittleEndian.Uint32(f.b[f.bo : f.bo+4]))
f.lru[1] = uint16(binary.LittleEndian.Uint32(f.b[f.bo+4 : f.bo+8]))
f.lru[2] = uint16(binary.LittleEndian.Uint32(f.b[f.bo+8 : f.bo+12]))
f.bo += 12
default:
return 0, 0, errCorrupt
}
return byte(blockType), blockSize, nil
}
// readTrees reads the two or three huffman trees for the current block.
// readAligned specifies whether to read the aligned offset tree.
func (f *decompressor) readTrees(readAligned bool) (main *huffman, length *huffman, aligned *huffman, err error) {
// Aligned offset blocks start with a small aligned offset tree.
if readAligned {
var alignedLen [8]byte
for i := range alignedLen {
alignedLen[i] = byte(f.getBits(3))
}
aligned = buildTable(alignedLen[:])
if aligned == nil {
err = errors.New("corrupt")
return
}
}
// The main tree is encoded in two parts.
err = f.readTree(f.mainlens[:maincodesplit])
if err != nil {
return
}
err = f.readTree(f.mainlens[maincodesplit:])
if err != nil {
return
}
main = buildTable(f.mainlens[:])
if main == nil {
err = errors.New("corrupt")
return
}
// The length tree is encoding in a single part.
err = f.readTree(f.lenlens[:])
if err != nil {
return
}
length = buildTable(f.lenlens[:])
if length == nil {
err = errors.New("corrupt")
return
}
err = f.err
return
}
// readCompressedBlock decodes a compressed block, writing into the window
// starting at start and ending at end, and using the provided huffman trees.
func (f *decompressor) readCompressedBlock(start, end uint16, hmain, hlength, haligned *huffman) (int, error) {
i := start
for i < end {
main := f.getCode(hmain)
if f.err != nil {
break
}
if main < 256 {
// Literal byte.
f.window[i] = byte(main)
i++
continue
}
// This is a match backward in the window. Determine
// the offset and dlength.
matchlen := (main - 256) % 8
slot := (main - 256) / 8
// The length is either the low bits of the code,
// or if this is 7, is encoded with the length tree.
if matchlen == 7 {
matchlen += f.getCode(hlength)
}
matchlen += 2
var matchoffset uint16
if slot < 3 {
// The offset is one of the LRU values.
matchoffset = f.lru[slot]
f.lru[slot] = f.lru[0]
f.lru[0] = matchoffset
} else {
// The offset is encoded as a combination of the
// slot and more bits from the bit stream.
offsetbits := footerBits[slot]
var verbatimbits, alignedbits uint16
if offsetbits > 0 {
if haligned != nil && offsetbits >= 3 {
// This is an aligned offset block. Combine
// the bits written verbatim with the aligned
// offset tree code.
verbatimbits = f.getBits(offsetbits-3) * 8
alignedbits = f.getCode(haligned)
} else {
// There are no aligned offset bits to read,
// only verbatim bits.
verbatimbits = f.getBits(offsetbits)
alignedbits = 0
}
}
matchoffset = basePosition[slot] + verbatimbits + alignedbits - 2
// Update the LRU cache.
f.lru[2] = f.lru[1]
f.lru[1] = f.lru[0]
f.lru[0] = matchoffset
}
if matchoffset <= i && matchlen <= end-i {
copyend := i + matchlen
for ; i < copyend; i++ {
f.window[i] = f.window[i-matchoffset]
}
} else {
f.fail(errCorrupt)
break
}
}
return int(i - start), f.err
}
// readBlock decodes the current block and returns the number of uncompressed bytes.
func (f *decompressor) readBlock(start uint16) (int, error) {
blockType, size, err := f.readBlockHeader()
if err != nil {
return 0, err
}
if blockType == uncompressedBlock {
if size%2 == 1 {
// Remember to realign the byte stream at the next block.
f.unaligned = true
}
copied := 0
if f.bo < f.bv {
copied = int(size)
s := int(start)
if copied > f.bv-f.bo {
copied = f.bv - f.bo
}
copy(f.window[s:s+copied], f.b[f.bo:f.bo+copied])
f.bo += copied
}
n, err := io.ReadFull(f.r, f.window[start+uint16(copied):start+size])
return copied + n, err
}
hmain, hlength, haligned, err := f.readTrees(blockType == alignedOffsetBlock)
if err != nil {
return 0, err
}
return f.readCompressedBlock(start, start+size, hmain, hlength, haligned)
}
// decodeE8 reverses the 0xe8 x86 instruction encoding that was performed
// to the uncompressed data before it was compressed.
func decodeE8(b []byte, off int64) {
if off > maxe8offset || len(b) < 10 {
return
}
for i := 0; i < len(b)-10; i++ {
if b[i] == 0xe8 {
currentPtr := int32(off) + int32(i)
abs := int32(binary.LittleEndian.Uint32(b[i+1 : i+5]))
if abs >= -currentPtr && abs < e8filesize {
var rel int32
if abs >= 0 {
rel = abs - currentPtr
} else {
rel = abs + e8filesize
}
binary.LittleEndian.PutUint32(b[i+1:i+5], uint32(rel))
}
i += 4
}
}
}
func (f *decompressor) Read(b []byte) (int, error) {
// Read and uncompress everything.
if f.windowReader == nil {
n := 0
for n < f.uncompressed {
k, err := f.readBlock(uint16(n))
if err != nil {
return 0, err
}
n += k
}
decodeE8(f.window[:f.uncompressed], 0)
f.windowReader = bytes.NewReader(f.window[:f.uncompressed])
}
// Just read directly from the window.
return f.windowReader.Read(b)
}
func (f *decompressor) Close() error {
return nil
}
// NewReader returns a new io.ReadCloser that decompresses a
// WIM LZX stream until uncompressedSize bytes have been returned.
func NewReader(r io.Reader, uncompressedSize int) (io.ReadCloser, error) {
if uncompressedSize > windowSize {
return nil, errors.New("uncompressed size is limited to 32KB")
}
f := &decompressor{
lru: [3]uint16{1, 1, 1},
uncompressed: uncompressedSize,
b: make([]byte, 4096),
r: r,
}
return f, nil
}

51
vendor/github.com/Microsoft/go-winio/wim/validate/validate.go generated vendored Normal file
View file

@ -0,0 +1,51 @@
package main
import (
"flag"
"fmt"
"os"
"github.com/Microsoft/go-winio/wim"
)
func main() {
flag.Parse()
f, err := os.Open(flag.Arg(0))
if err != nil {
panic(err)
}
w, err := wim.NewReader(f)
if err != nil {
panic(err)
}
fmt.Printf("%#v\n%#v\n", w.Image[0], w.Image[0].Windows)
dir, err := w.Image[0].Open()
if err != nil {
panic(err)
}
err = recur(dir)
if err != nil {
panic(err)
}
}
func recur(d *wim.File) error {
files, err := d.Readdir()
if err != nil {
return fmt.Errorf("%s: %s", d.Name, err)
}
for _, f := range files {
if f.IsDir() {
err = recur(f)
if err != nil {
return fmt.Errorf("%s: %s", f.Name, err)
}
}
}
return nil
}

866
vendor/github.com/Microsoft/go-winio/wim/wim.go generated vendored Normal file
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@ -0,0 +1,866 @@
// Package wim implements a WIM file parser.
//
// WIM files are used to distribute Windows file system and container images.
// They are documented at https://msdn.microsoft.com/en-us/library/windows/desktop/dd861280.aspx.
package wim
import (
"bytes"
"crypto/sha1"
"encoding/binary"
"encoding/xml"
"errors"
"fmt"
"io"
"io/ioutil"
"strconv"
"sync"
"time"
"unicode/utf16"
)
// File attribute constants from Windows.
const (
FILE_ATTRIBUTE_READONLY = 0x00000001
FILE_ATTRIBUTE_HIDDEN = 0x00000002
FILE_ATTRIBUTE_SYSTEM = 0x00000004
FILE_ATTRIBUTE_DIRECTORY = 0x00000010
FILE_ATTRIBUTE_ARCHIVE = 0x00000020
FILE_ATTRIBUTE_DEVICE = 0x00000040
FILE_ATTRIBUTE_NORMAL = 0x00000080
FILE_ATTRIBUTE_TEMPORARY = 0x00000100
FILE_ATTRIBUTE_SPARSE_FILE = 0x00000200
FILE_ATTRIBUTE_REPARSE_POINT = 0x00000400
FILE_ATTRIBUTE_COMPRESSED = 0x00000800
FILE_ATTRIBUTE_OFFLINE = 0x00001000
FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = 0x00002000
FILE_ATTRIBUTE_ENCRYPTED = 0x00004000
FILE_ATTRIBUTE_INTEGRITY_STREAM = 0x00008000
FILE_ATTRIBUTE_VIRTUAL = 0x00010000
FILE_ATTRIBUTE_NO_SCRUB_DATA = 0x00020000
FILE_ATTRIBUTE_EA = 0x00040000
)
// Windows processor architectures.
const (
PROCESSOR_ARCHITECTURE_INTEL = 0
PROCESSOR_ARCHITECTURE_MIPS = 1
PROCESSOR_ARCHITECTURE_ALPHA = 2
PROCESSOR_ARCHITECTURE_PPC = 3
PROCESSOR_ARCHITECTURE_SHX = 4
PROCESSOR_ARCHITECTURE_ARM = 5
PROCESSOR_ARCHITECTURE_IA64 = 6
PROCESSOR_ARCHITECTURE_ALPHA64 = 7
PROCESSOR_ARCHITECTURE_MSIL = 8
PROCESSOR_ARCHITECTURE_AMD64 = 9
PROCESSOR_ARCHITECTURE_IA32_ON_WIN64 = 10
PROCESSOR_ARCHITECTURE_NEUTRAL = 11
PROCESSOR_ARCHITECTURE_ARM64 = 12
)
var wimImageTag = [...]byte{'M', 'S', 'W', 'I', 'M', 0, 0, 0}
type guid struct {
Data1 uint32
Data2 uint16
Data3 uint16
Data4 [8]byte
}
func (g guid) String() string {
return fmt.Sprintf("%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", g.Data1, g.Data2, g.Data3, g.Data4[0], g.Data4[1], g.Data4[2], g.Data4[3], g.Data4[4], g.Data4[5], g.Data4[6], g.Data4[7])
}
type resourceDescriptor struct {
FlagsAndCompressedSize uint64
Offset int64
OriginalSize int64
}
type resFlag byte
const (
resFlagFree resFlag = 1 << iota
resFlagMetadata
resFlagCompressed
resFlagSpanned
)
const validate = false
const supportedResFlags = resFlagMetadata | resFlagCompressed
func (r *resourceDescriptor) Flags() resFlag {
return resFlag(r.FlagsAndCompressedSize >> 56)
}
func (r *resourceDescriptor) CompressedSize() int64 {
return int64(r.FlagsAndCompressedSize & 0xffffffffffffff)
}
func (r *resourceDescriptor) String() string {
s := fmt.Sprintf("%d bytes at %d", r.CompressedSize(), r.Offset)
if r.Flags()&4 != 0 {
s += fmt.Sprintf(" (uncompresses to %d)", r.OriginalSize)
}
return s
}
// SHA1Hash contains the SHA1 hash of a file or stream.
type SHA1Hash [20]byte
type streamDescriptor struct {
resourceDescriptor
PartNumber uint16
RefCount uint32
Hash SHA1Hash
}
type hdrFlag uint32
const (
hdrFlagReserved hdrFlag = 1 << iota
hdrFlagCompressed
hdrFlagReadOnly
hdrFlagSpanned
hdrFlagResourceOnly
hdrFlagMetadataOnly
hdrFlagWriteInProgress
hdrFlagRpFix
)
const (
hdrFlagCompressReserved hdrFlag = 1 << (iota + 16)
hdrFlagCompressXpress
hdrFlagCompressLzx
)
const supportedHdrFlags = hdrFlagRpFix | hdrFlagReadOnly | hdrFlagCompressed | hdrFlagCompressLzx
type wimHeader struct {
ImageTag [8]byte
Size uint32
Version uint32
Flags hdrFlag
CompressionSize uint32
WIMGuid guid
PartNumber uint16
TotalParts uint16
ImageCount uint32
OffsetTable resourceDescriptor
XMLData resourceDescriptor
BootMetadata resourceDescriptor
BootIndex uint32
Padding uint32
Integrity resourceDescriptor
Unused [60]byte
}
type securityblockDisk struct {
TotalLength uint32
NumEntries uint32
}
const securityblockDiskSize = 8
type direntry struct {
Attributes uint32
SecurityID uint32
SubdirOffset int64
Unused1, Unused2 int64
CreationTime Filetime
LastAccessTime Filetime
LastWriteTime Filetime
Hash SHA1Hash
Padding uint32
ReparseHardLink int64
StreamCount uint16
ShortNameLength uint16
FileNameLength uint16
}
var direntrySize = int64(binary.Size(direntry{}) + 8) // includes an 8-byte length prefix
type streamentry struct {
Unused int64
Hash SHA1Hash
NameLength int16
}
var streamentrySize = int64(binary.Size(streamentry{}) + 8) // includes an 8-byte length prefix
// Filetime represents a Windows time.
type Filetime struct {
LowDateTime uint32
HighDateTime uint32
}
// Time returns the time as time.Time.
func (ft *Filetime) Time() time.Time {
// 100-nanosecond intervals since January 1, 1601
nsec := int64(ft.HighDateTime)<<32 + int64(ft.LowDateTime)
// change starting time to the Epoch (00:00:00 UTC, January 1, 1970)
nsec -= 116444736000000000
// convert into nanoseconds
nsec *= 100
return time.Unix(0, nsec)
}
// UnmarshalXML unmarshals the time from a WIM XML blob.
func (ft *Filetime) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
type time struct {
Low string `xml:"LOWPART"`
High string `xml:"HIGHPART"`
}
var t time
err := d.DecodeElement(&t, &start)
if err != nil {
return err
}
low, err := strconv.ParseUint(t.Low, 0, 32)
if err != nil {
return err
}
high, err := strconv.ParseUint(t.High, 0, 32)
if err != nil {
return err
}
ft.LowDateTime = uint32(low)
ft.HighDateTime = uint32(high)
return nil
}
type info struct {
Image []ImageInfo `xml:"IMAGE"`
}
// ImageInfo contains information about the image.
type ImageInfo struct {
Name string `xml:"NAME"`
Index int `xml:"INDEX,attr"`
CreationTime Filetime `xml:"CREATIONTIME"`
ModTime Filetime `xml:"LASTMODIFICATIONTIME"`
Windows *WindowsInfo `xml:"WINDOWS"`
}
// WindowsInfo contains information about the Windows installation in the image.
type WindowsInfo struct {
Arch byte `xml:"ARCH"`
ProductName string `xml:"PRODUCTNAME"`
EditionID string `xml:"EDITIONID"`
InstallationType string `xml:"INSTALLATIONTYPE"`
ProductType string `xml:"PRODUCTTYPE"`
Languages []string `xml:"LANGUAGES>LANGUAGE"`
DefaultLanguage string `xml:"LANGUAGES>DEFAULT"`
Version Version `xml:"VERSION"`
SystemRoot string `xml:"SYSTEMROOT"`
}
// Version represents a Windows build version.
type Version struct {
Major int `xml:"MAJOR"`
Minor int `xml:"MINOR"`
Build int `xml:"BUILD"`
SPBuild int `xml:"SPBUILD"`
SPLevel int `xml:"SPLEVEL"`
}
// ParseError is returned when the WIM cannot be parsed.
type ParseError struct {
Oper string
Path string
Err error
}
func (e *ParseError) Error() string {
if e.Path == "" {
return "WIM parse error at " + e.Oper + ": " + e.Err.Error()
}
return fmt.Sprintf("WIM parse error: %s %s: %s", e.Oper, e.Path, e.Err.Error())
}
// Reader provides functions to read a WIM file.
type Reader struct {
hdr wimHeader
r io.ReaderAt
fileData map[SHA1Hash]resourceDescriptor
XMLInfo string // The XML information about the WIM.
Image []*Image // The WIM's images.
}
// Image represents an image within a WIM file.
type Image struct {
wim *Reader
offset resourceDescriptor
sds [][]byte
rootOffset int64
r io.ReadCloser
curOffset int64
m sync.Mutex
ImageInfo
}
// StreamHeader contains alternate data stream metadata.
type StreamHeader struct {
Name string
Hash SHA1Hash
Size int64
}
// Stream represents an alternate data stream or reparse point data stream.
type Stream struct {
StreamHeader
wim *Reader
offset resourceDescriptor
}
// FileHeader contains file metadata.
type FileHeader struct {
Name string
ShortName string
Attributes uint32
SecurityDescriptor []byte
CreationTime Filetime
LastAccessTime Filetime
LastWriteTime Filetime
Hash SHA1Hash
Size int64
LinkID int64
ReparseTag uint32
ReparseReserved uint32
}
// File represents a file or directory in a WIM image.
type File struct {
FileHeader
Streams []*Stream
offset resourceDescriptor
img *Image
subdirOffset int64
}
// NewReader returns a Reader that can be used to read WIM file data.
func NewReader(f io.ReaderAt) (*Reader, error) {
r := &Reader{r: f}
section := io.NewSectionReader(f, 0, 0xffff)
err := binary.Read(section, binary.LittleEndian, &r.hdr)
if err != nil {
return nil, err
}
if r.hdr.ImageTag != wimImageTag {
return nil, &ParseError{Oper: "image tag", Err: errors.New("not a WIM file")}
}
if r.hdr.Flags&^supportedHdrFlags != 0 {
return nil, fmt.Errorf("unsupported WIM flags %x", r.hdr.Flags&^supportedHdrFlags)
}
if r.hdr.CompressionSize != 0x8000 {
return nil, fmt.Errorf("unsupported compression size %d", r.hdr.CompressionSize)
}
if r.hdr.TotalParts != 1 {
return nil, errors.New("multi-part WIM not supported")
}
fileData, images, err := r.readOffsetTable(&r.hdr.OffsetTable)
if err != nil {
return nil, err
}
xmlinfo, err := r.readXML()
if err != nil {
return nil, err
}
var info info
err = xml.Unmarshal([]byte(xmlinfo), &info)
if err != nil {
return nil, &ParseError{Oper: "XML info", Err: err}
}
for i, img := range images {
for _, imgInfo := range info.Image {
if imgInfo.Index == i+1 {
img.ImageInfo = imgInfo
break
}
}
}
r.fileData = fileData
r.Image = images
r.XMLInfo = xmlinfo
return r, nil
}
// Close releases resources associated with the Reader.
func (r *Reader) Close() error {
for _, img := range r.Image {
img.reset()
}
return nil
}
func (r *Reader) resourceReader(hdr *resourceDescriptor) (io.ReadCloser, error) {
return r.resourceReaderWithOffset(hdr, 0)
}
func (r *Reader) resourceReaderWithOffset(hdr *resourceDescriptor, offset int64) (io.ReadCloser, error) {
var sr io.ReadCloser
section := io.NewSectionReader(r.r, hdr.Offset, hdr.CompressedSize())
if hdr.Flags()&resFlagCompressed == 0 {
section.Seek(offset, 0)
sr = ioutil.NopCloser(section)
} else {
cr, err := newCompressedReader(section, hdr.OriginalSize, offset)
if err != nil {
return nil, err
}
sr = cr
}
return sr, nil
}
func (r *Reader) readResource(hdr *resourceDescriptor) ([]byte, error) {
rsrc, err := r.resourceReader(hdr)
if err != nil {
return nil, err
}
defer rsrc.Close()
return ioutil.ReadAll(rsrc)
}
func (r *Reader) readXML() (string, error) {
if r.hdr.XMLData.CompressedSize() == 0 {
return "", nil
}
rsrc, err := r.resourceReader(&r.hdr.XMLData)
if err != nil {
return "", err
}
defer rsrc.Close()
XMLData := make([]uint16, r.hdr.XMLData.OriginalSize/2)
err = binary.Read(rsrc, binary.LittleEndian, XMLData)
if err != nil {
return "", &ParseError{Oper: "XML data", Err: err}
}
// The BOM will always indicate little-endian UTF-16.
if XMLData[0] != 0xfeff {
return "", &ParseError{Oper: "XML data", Err: errors.New("invalid BOM")}
}
return string(utf16.Decode(XMLData[1:])), nil
}
func (r *Reader) readOffsetTable(res *resourceDescriptor) (map[SHA1Hash]resourceDescriptor, []*Image, error) {
fileData := make(map[SHA1Hash]resourceDescriptor)
var images []*Image
offsetTable, err := r.readResource(res)
if err != nil {
return nil, nil, &ParseError{Oper: "offset table", Err: err}
}
br := bytes.NewReader(offsetTable)
for i := 0; ; i++ {
var res streamDescriptor
err := binary.Read(br, binary.LittleEndian, &res)
if err == io.EOF {
break
}
if err != nil {
return nil, nil, &ParseError{Oper: "offset table", Err: err}
}
if res.Flags()&^supportedResFlags != 0 {
return nil, nil, &ParseError{Oper: "offset table", Err: errors.New("unsupported resource flag")}
}
// Validation for ad-hoc testing
if validate {
sec, err := r.resourceReader(&res.resourceDescriptor)
if err != nil {
panic(fmt.Sprint(i, err))
}
hash := sha1.New()
_, err = io.Copy(hash, sec)
sec.Close()
if err != nil {
panic(fmt.Sprint(i, err))
}
var cmphash SHA1Hash
copy(cmphash[:], hash.Sum(nil))
if cmphash != res.Hash {
panic(fmt.Sprint(i, "hash mismatch"))
}
}
if res.Flags()&resFlagMetadata != 0 {
image := &Image{
wim: r,
offset: res.resourceDescriptor,
}
images = append(images, image)
} else {
fileData[res.Hash] = res.resourceDescriptor
}
}
if len(images) != int(r.hdr.ImageCount) {
return nil, nil, &ParseError{Oper: "offset table", Err: errors.New("mismatched image count")}
}
return fileData, images, nil
}
func (r *Reader) readSecurityDescriptors(rsrc io.Reader) (sds [][]byte, n int64, err error) {
var secBlock securityblockDisk
err = binary.Read(rsrc, binary.LittleEndian, &secBlock)
if err != nil {
err = &ParseError{Oper: "security table", Err: err}
return
}
n += securityblockDiskSize
secSizes := make([]int64, secBlock.NumEntries)
err = binary.Read(rsrc, binary.LittleEndian, &secSizes)
if err != nil {
err = &ParseError{Oper: "security table sizes", Err: err}
return
}
n += int64(secBlock.NumEntries * 8)
sds = make([][]byte, secBlock.NumEntries)
for i, size := range secSizes {
sd := make([]byte, size&0xffffffff)
_, err = io.ReadFull(rsrc, sd)
if err != nil {
err = &ParseError{Oper: "security descriptor", Err: err}
return
}
n += int64(len(sd))
sds[i] = sd
}
secsize := int64((secBlock.TotalLength + 7) &^ 7)
if n > secsize {
err = &ParseError{Oper: "security descriptor", Err: errors.New("security descriptor table too small")}
return
}
_, err = io.CopyN(ioutil.Discard, rsrc, secsize-n)
if err != nil {
return
}
n = secsize
return
}
// Open parses the image and returns the root directory.
func (img *Image) Open() (*File, error) {
if img.sds == nil {
rsrc, err := img.wim.resourceReaderWithOffset(&img.offset, img.rootOffset)
if err != nil {
return nil, err
}
sds, n, err := img.wim.readSecurityDescriptors(rsrc)
if err != nil {
rsrc.Close()
return nil, err
}
img.sds = sds
img.r = rsrc
img.rootOffset = n
img.curOffset = n
}
f, err := img.readdir(img.rootOffset)
if err != nil {
return nil, err
}
if len(f) != 1 {
return nil, &ParseError{Oper: "root directory", Err: errors.New("expected exactly 1 root directory entry")}
}
return f[0], err
}
func (img *Image) reset() {
if img.r != nil {
img.r.Close()
img.r = nil
}
img.curOffset = -1
}
func (img *Image) readdir(offset int64) ([]*File, error) {
img.m.Lock()
defer img.m.Unlock()
if offset < img.curOffset || offset > img.curOffset+chunkSize {
// Reset to seek backward or to seek forward very far.
img.reset()
}
if img.r == nil {
rsrc, err := img.wim.resourceReaderWithOffset(&img.offset, offset)
if err != nil {
return nil, err
}
img.r = rsrc
img.curOffset = offset
}
if offset > img.curOffset {
_, err := io.CopyN(ioutil.Discard, img.r, offset-img.curOffset)
if err != nil {
img.reset()
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
return nil, err
}
}
var entries []*File
for {
e, n, err := img.readNextEntry(img.r)
img.curOffset += n
if err == io.EOF {
break
}
if err != nil {
img.reset()
return nil, err
}
entries = append(entries, e)
}
return entries, nil
}
func (img *Image) readNextEntry(r io.Reader) (*File, int64, error) {
var length int64
err := binary.Read(r, binary.LittleEndian, &length)
if err != nil {
return nil, 0, &ParseError{Oper: "directory length check", Err: err}
}
if length == 0 {
return nil, 8, io.EOF
}
left := length
if left < direntrySize {
return nil, 0, &ParseError{Oper: "directory entry", Err: errors.New("size too short")}
}
var dentry direntry
err = binary.Read(r, binary.LittleEndian, &dentry)
if err != nil {
return nil, 0, &ParseError{Oper: "directory entry", Err: err}
}
left -= direntrySize
namesLen := int64(dentry.FileNameLength + 2 + dentry.ShortNameLength)
if left < namesLen {
return nil, 0, &ParseError{Oper: "directory entry", Err: errors.New("size too short for names")}
}
names := make([]uint16, namesLen/2)
err = binary.Read(r, binary.LittleEndian, names)
if err != nil {
return nil, 0, &ParseError{Oper: "file name", Err: err}
}
left -= namesLen
var name, shortName string
if dentry.FileNameLength > 0 {
name = string(utf16.Decode(names[:dentry.FileNameLength/2]))
}
if dentry.ShortNameLength > 0 {
shortName = string(utf16.Decode(names[dentry.FileNameLength/2+1:]))
}
var offset resourceDescriptor
zerohash := SHA1Hash{}
if dentry.Hash != zerohash {
var ok bool
offset, ok = img.wim.fileData[dentry.Hash]
if !ok {
return nil, 0, &ParseError{Oper: "directory entry", Path: name, Err: fmt.Errorf("could not find file data matching hash %#v", dentry)}
}
}
f := &File{
FileHeader: FileHeader{
Attributes: dentry.Attributes,
CreationTime: dentry.CreationTime,
LastAccessTime: dentry.LastAccessTime,
LastWriteTime: dentry.LastWriteTime,
Hash: dentry.Hash,
Size: offset.OriginalSize,
Name: name,
ShortName: shortName,
},
offset: offset,
img: img,
subdirOffset: dentry.SubdirOffset,
}
isDir := false
if dentry.Attributes&FILE_ATTRIBUTE_REPARSE_POINT == 0 {
f.LinkID = dentry.ReparseHardLink
if dentry.Attributes&FILE_ATTRIBUTE_DIRECTORY != 0 {
isDir = true
}
} else {
f.ReparseTag = uint32(dentry.ReparseHardLink)
f.ReparseReserved = uint32(dentry.ReparseHardLink >> 32)
}
if isDir && f.subdirOffset == 0 {
return nil, 0, &ParseError{Oper: "directory entry", Path: name, Err: errors.New("no subdirectory data for directory")}
} else if !isDir && f.subdirOffset != 0 {
return nil, 0, &ParseError{Oper: "directory entry", Path: name, Err: errors.New("unexpected subdirectory data for non-directory")}
}
if dentry.SecurityID != 0xffffffff {
f.SecurityDescriptor = img.sds[dentry.SecurityID]
}
_, err = io.CopyN(ioutil.Discard, r, left)
if err != nil {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
return nil, 0, err
}
if dentry.StreamCount > 0 {
var streams []*Stream
for i := uint16(0); i < dentry.StreamCount; i++ {
s, n, err := img.readNextStream(r)
length += n
if err != nil {
return nil, 0, err
}
// The first unnamed stream should be treated as the file stream.
if i == 0 && s.Name == "" {
f.Hash = s.Hash
f.Size = s.Size
f.offset = s.offset
} else if s.Name != "" {
streams = append(streams, s)
}
}
f.Streams = streams
}
if dentry.Attributes&FILE_ATTRIBUTE_REPARSE_POINT != 0 && f.Size == 0 {
return nil, 0, &ParseError{Oper: "directory entry", Path: name, Err: errors.New("reparse point is missing reparse stream")}
}
return f, length, nil
}
func (img *Image) readNextStream(r io.Reader) (*Stream, int64, error) {
var length int64
err := binary.Read(r, binary.LittleEndian, &length)
if err != nil {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
return nil, 0, &ParseError{Oper: "stream length check", Err: err}
}
left := length
if left < streamentrySize {
return nil, 0, &ParseError{Oper: "stream entry", Err: errors.New("size too short")}
}
var sentry streamentry
err = binary.Read(r, binary.LittleEndian, &sentry)
if err != nil {
return nil, 0, &ParseError{Oper: "stream entry", Err: err}
}
left -= streamentrySize
if left < int64(sentry.NameLength) {
return nil, 0, &ParseError{Oper: "stream entry", Err: errors.New("size too short for name")}
}
names := make([]uint16, sentry.NameLength/2)
err = binary.Read(r, binary.LittleEndian, names)
if err != nil {
return nil, 0, &ParseError{Oper: "file name", Err: err}
}
left -= int64(sentry.NameLength)
name := string(utf16.Decode(names))
var offset resourceDescriptor
if sentry.Hash != (SHA1Hash{}) {
var ok bool
offset, ok = img.wim.fileData[sentry.Hash]
if !ok {
return nil, 0, &ParseError{Oper: "stream entry", Path: name, Err: fmt.Errorf("could not find file data matching hash %v", sentry.Hash)}
}
}
s := &Stream{
StreamHeader: StreamHeader{
Hash: sentry.Hash,
Size: offset.OriginalSize,
Name: name,
},
wim: img.wim,
offset: offset,
}
_, err = io.CopyN(ioutil.Discard, r, left)
if err != nil {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
return nil, 0, err
}
return s, length, nil
}
// Open returns an io.ReadCloser that can be used to read the stream's contents.
func (s *Stream) Open() (io.ReadCloser, error) {
return s.wim.resourceReader(&s.offset)
}
// Open returns an io.ReadCloser that can be used to read the file's contents.
func (f *File) Open() (io.ReadCloser, error) {
return f.img.wim.resourceReader(&f.offset)
}
// Readdir reads the directory entries.
func (f *File) Readdir() ([]*File, error) {
if !f.IsDir() {
return nil, errors.New("not a directory")
}
return f.img.readdir(f.subdirOffset)
}
// IsDir returns whether the given file is a directory. It returns false when it
// is a directory reparse point.
func (f *FileHeader) IsDir() bool {
return f.Attributes&(FILE_ATTRIBUTE_DIRECTORY|FILE_ATTRIBUTE_REPARSE_POINT) == FILE_ATTRIBUTE_DIRECTORY
}

520
vendor/github.com/Microsoft/go-winio/zsyscall_windows.go generated vendored Normal file
View file

@ -0,0 +1,520 @@
// MACHINE GENERATED BY 'go generate' COMMAND; DO NOT EDIT
package winio
import (
"syscall"
"unsafe"
"golang.org/x/sys/windows"
)
var _ unsafe.Pointer
// Do the interface allocations only once for common
// Errno values.
const (
errnoERROR_IO_PENDING = 997
)
var (
errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING)
)
// errnoErr returns common boxed Errno values, to prevent
// allocations at runtime.
func errnoErr(e syscall.Errno) error {
switch e {
case 0:
return nil
case errnoERROR_IO_PENDING:
return errERROR_IO_PENDING
}
// TODO: add more here, after collecting data on the common
// error values see on Windows. (perhaps when running
// all.bat?)
return e
}
var (
modkernel32 = windows.NewLazySystemDLL("kernel32.dll")
modadvapi32 = windows.NewLazySystemDLL("advapi32.dll")
procCancelIoEx = modkernel32.NewProc("CancelIoEx")
procCreateIoCompletionPort = modkernel32.NewProc("CreateIoCompletionPort")
procGetQueuedCompletionStatus = modkernel32.NewProc("GetQueuedCompletionStatus")
procSetFileCompletionNotificationModes = modkernel32.NewProc("SetFileCompletionNotificationModes")
procConnectNamedPipe = modkernel32.NewProc("ConnectNamedPipe")
procCreateNamedPipeW = modkernel32.NewProc("CreateNamedPipeW")
procCreateFileW = modkernel32.NewProc("CreateFileW")
procWaitNamedPipeW = modkernel32.NewProc("WaitNamedPipeW")
procGetNamedPipeInfo = modkernel32.NewProc("GetNamedPipeInfo")
procGetNamedPipeHandleStateW = modkernel32.NewProc("GetNamedPipeHandleStateW")
procLocalAlloc = modkernel32.NewProc("LocalAlloc")
procLookupAccountNameW = modadvapi32.NewProc("LookupAccountNameW")
procConvertSidToStringSidW = modadvapi32.NewProc("ConvertSidToStringSidW")
procConvertStringSecurityDescriptorToSecurityDescriptorW = modadvapi32.NewProc("ConvertStringSecurityDescriptorToSecurityDescriptorW")
procConvertSecurityDescriptorToStringSecurityDescriptorW = modadvapi32.NewProc("ConvertSecurityDescriptorToStringSecurityDescriptorW")
procLocalFree = modkernel32.NewProc("LocalFree")
procGetSecurityDescriptorLength = modadvapi32.NewProc("GetSecurityDescriptorLength")
procGetFileInformationByHandleEx = modkernel32.NewProc("GetFileInformationByHandleEx")
procSetFileInformationByHandle = modkernel32.NewProc("SetFileInformationByHandle")
procAdjustTokenPrivileges = modadvapi32.NewProc("AdjustTokenPrivileges")
procImpersonateSelf = modadvapi32.NewProc("ImpersonateSelf")
procRevertToSelf = modadvapi32.NewProc("RevertToSelf")
procOpenThreadToken = modadvapi32.NewProc("OpenThreadToken")
procGetCurrentThread = modkernel32.NewProc("GetCurrentThread")
procLookupPrivilegeValueW = modadvapi32.NewProc("LookupPrivilegeValueW")
procLookupPrivilegeNameW = modadvapi32.NewProc("LookupPrivilegeNameW")
procLookupPrivilegeDisplayNameW = modadvapi32.NewProc("LookupPrivilegeDisplayNameW")
procBackupRead = modkernel32.NewProc("BackupRead")
procBackupWrite = modkernel32.NewProc("BackupWrite")
)
func cancelIoEx(file syscall.Handle, o *syscall.Overlapped) (err error) {
r1, _, e1 := syscall.Syscall(procCancelIoEx.Addr(), 2, uintptr(file), uintptr(unsafe.Pointer(o)), 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func createIoCompletionPort(file syscall.Handle, port syscall.Handle, key uintptr, threadCount uint32) (newport syscall.Handle, err error) {
r0, _, e1 := syscall.Syscall6(procCreateIoCompletionPort.Addr(), 4, uintptr(file), uintptr(port), uintptr(key), uintptr(threadCount), 0, 0)
newport = syscall.Handle(r0)
if newport == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func getQueuedCompletionStatus(port syscall.Handle, bytes *uint32, key *uintptr, o **ioOperation, timeout uint32) (err error) {
r1, _, e1 := syscall.Syscall6(procGetQueuedCompletionStatus.Addr(), 5, uintptr(port), uintptr(unsafe.Pointer(bytes)), uintptr(unsafe.Pointer(key)), uintptr(unsafe.Pointer(o)), uintptr(timeout), 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func setFileCompletionNotificationModes(h syscall.Handle, flags uint8) (err error) {
r1, _, e1 := syscall.Syscall(procSetFileCompletionNotificationModes.Addr(), 2, uintptr(h), uintptr(flags), 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func connectNamedPipe(pipe syscall.Handle, o *syscall.Overlapped) (err error) {
r1, _, e1 := syscall.Syscall(procConnectNamedPipe.Addr(), 2, uintptr(pipe), uintptr(unsafe.Pointer(o)), 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func createNamedPipe(name string, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *syscall.SecurityAttributes) (handle syscall.Handle, err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(name)
if err != nil {
return
}
return _createNamedPipe(_p0, flags, pipeMode, maxInstances, outSize, inSize, defaultTimeout, sa)
}
func _createNamedPipe(name *uint16, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *syscall.SecurityAttributes) (handle syscall.Handle, err error) {
r0, _, e1 := syscall.Syscall9(procCreateNamedPipeW.Addr(), 8, uintptr(unsafe.Pointer(name)), uintptr(flags), uintptr(pipeMode), uintptr(maxInstances), uintptr(outSize), uintptr(inSize), uintptr(defaultTimeout), uintptr(unsafe.Pointer(sa)), 0)
handle = syscall.Handle(r0)
if handle == syscall.InvalidHandle {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func createFile(name string, access uint32, mode uint32, sa *syscall.SecurityAttributes, createmode uint32, attrs uint32, templatefile syscall.Handle) (handle syscall.Handle, err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(name)
if err != nil {
return
}
return _createFile(_p0, access, mode, sa, createmode, attrs, templatefile)
}
func _createFile(name *uint16, access uint32, mode uint32, sa *syscall.SecurityAttributes, createmode uint32, attrs uint32, templatefile syscall.Handle) (handle syscall.Handle, err error) {
r0, _, e1 := syscall.Syscall9(procCreateFileW.Addr(), 7, uintptr(unsafe.Pointer(name)), uintptr(access), uintptr(mode), uintptr(unsafe.Pointer(sa)), uintptr(createmode), uintptr(attrs), uintptr(templatefile), 0, 0)
handle = syscall.Handle(r0)
if handle == syscall.InvalidHandle {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func waitNamedPipe(name string, timeout uint32) (err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(name)
if err != nil {
return
}
return _waitNamedPipe(_p0, timeout)
}
func _waitNamedPipe(name *uint16, timeout uint32) (err error) {
r1, _, e1 := syscall.Syscall(procWaitNamedPipeW.Addr(), 2, uintptr(unsafe.Pointer(name)), uintptr(timeout), 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func getNamedPipeInfo(pipe syscall.Handle, flags *uint32, outSize *uint32, inSize *uint32, maxInstances *uint32) (err error) {
r1, _, e1 := syscall.Syscall6(procGetNamedPipeInfo.Addr(), 5, uintptr(pipe), uintptr(unsafe.Pointer(flags)), uintptr(unsafe.Pointer(outSize)), uintptr(unsafe.Pointer(inSize)), uintptr(unsafe.Pointer(maxInstances)), 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func getNamedPipeHandleState(pipe syscall.Handle, state *uint32, curInstances *uint32, maxCollectionCount *uint32, collectDataTimeout *uint32, userName *uint16, maxUserNameSize uint32) (err error) {
r1, _, e1 := syscall.Syscall9(procGetNamedPipeHandleStateW.Addr(), 7, uintptr(pipe), uintptr(unsafe.Pointer(state)), uintptr(unsafe.Pointer(curInstances)), uintptr(unsafe.Pointer(maxCollectionCount)), uintptr(unsafe.Pointer(collectDataTimeout)), uintptr(unsafe.Pointer(userName)), uintptr(maxUserNameSize), 0, 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func localAlloc(uFlags uint32, length uint32) (ptr uintptr) {
r0, _, _ := syscall.Syscall(procLocalAlloc.Addr(), 2, uintptr(uFlags), uintptr(length), 0)
ptr = uintptr(r0)
return
}
func lookupAccountName(systemName *uint16, accountName string, sid *byte, sidSize *uint32, refDomain *uint16, refDomainSize *uint32, sidNameUse *uint32) (err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(accountName)
if err != nil {
return
}
return _lookupAccountName(systemName, _p0, sid, sidSize, refDomain, refDomainSize, sidNameUse)
}
func _lookupAccountName(systemName *uint16, accountName *uint16, sid *byte, sidSize *uint32, refDomain *uint16, refDomainSize *uint32, sidNameUse *uint32) (err error) {
r1, _, e1 := syscall.Syscall9(procLookupAccountNameW.Addr(), 7, uintptr(unsafe.Pointer(systemName)), uintptr(unsafe.Pointer(accountName)), uintptr(unsafe.Pointer(sid)), uintptr(unsafe.Pointer(sidSize)), uintptr(unsafe.Pointer(refDomain)), uintptr(unsafe.Pointer(refDomainSize)), uintptr(unsafe.Pointer(sidNameUse)), 0, 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func convertSidToStringSid(sid *byte, str **uint16) (err error) {
r1, _, e1 := syscall.Syscall(procConvertSidToStringSidW.Addr(), 2, uintptr(unsafe.Pointer(sid)), uintptr(unsafe.Pointer(str)), 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func convertStringSecurityDescriptorToSecurityDescriptor(str string, revision uint32, sd *uintptr, size *uint32) (err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(str)
if err != nil {
return
}
return _convertStringSecurityDescriptorToSecurityDescriptor(_p0, revision, sd, size)
}
func _convertStringSecurityDescriptorToSecurityDescriptor(str *uint16, revision uint32, sd *uintptr, size *uint32) (err error) {
r1, _, e1 := syscall.Syscall6(procConvertStringSecurityDescriptorToSecurityDescriptorW.Addr(), 4, uintptr(unsafe.Pointer(str)), uintptr(revision), uintptr(unsafe.Pointer(sd)), uintptr(unsafe.Pointer(size)), 0, 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func convertSecurityDescriptorToStringSecurityDescriptor(sd *byte, revision uint32, secInfo uint32, sddl **uint16, sddlSize *uint32) (err error) {
r1, _, e1 := syscall.Syscall6(procConvertSecurityDescriptorToStringSecurityDescriptorW.Addr(), 5, uintptr(unsafe.Pointer(sd)), uintptr(revision), uintptr(secInfo), uintptr(unsafe.Pointer(sddl)), uintptr(unsafe.Pointer(sddlSize)), 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func localFree(mem uintptr) {
syscall.Syscall(procLocalFree.Addr(), 1, uintptr(mem), 0, 0)
return
}
func getSecurityDescriptorLength(sd uintptr) (len uint32) {
r0, _, _ := syscall.Syscall(procGetSecurityDescriptorLength.Addr(), 1, uintptr(sd), 0, 0)
len = uint32(r0)
return
}
func getFileInformationByHandleEx(h syscall.Handle, class uint32, buffer *byte, size uint32) (err error) {
r1, _, e1 := syscall.Syscall6(procGetFileInformationByHandleEx.Addr(), 4, uintptr(h), uintptr(class), uintptr(unsafe.Pointer(buffer)), uintptr(size), 0, 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func setFileInformationByHandle(h syscall.Handle, class uint32, buffer *byte, size uint32) (err error) {
r1, _, e1 := syscall.Syscall6(procSetFileInformationByHandle.Addr(), 4, uintptr(h), uintptr(class), uintptr(unsafe.Pointer(buffer)), uintptr(size), 0, 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func adjustTokenPrivileges(token windows.Token, releaseAll bool, input *byte, outputSize uint32, output *byte, requiredSize *uint32) (success bool, err error) {
var _p0 uint32
if releaseAll {
_p0 = 1
} else {
_p0 = 0
}
r0, _, e1 := syscall.Syscall6(procAdjustTokenPrivileges.Addr(), 6, uintptr(token), uintptr(_p0), uintptr(unsafe.Pointer(input)), uintptr(outputSize), uintptr(unsafe.Pointer(output)), uintptr(unsafe.Pointer(requiredSize)))
success = r0 != 0
if true {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func impersonateSelf(level uint32) (err error) {
r1, _, e1 := syscall.Syscall(procImpersonateSelf.Addr(), 1, uintptr(level), 0, 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func revertToSelf() (err error) {
r1, _, e1 := syscall.Syscall(procRevertToSelf.Addr(), 0, 0, 0, 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func openThreadToken(thread syscall.Handle, accessMask uint32, openAsSelf bool, token *windows.Token) (err error) {
var _p0 uint32
if openAsSelf {
_p0 = 1
} else {
_p0 = 0
}
r1, _, e1 := syscall.Syscall6(procOpenThreadToken.Addr(), 4, uintptr(thread), uintptr(accessMask), uintptr(_p0), uintptr(unsafe.Pointer(token)), 0, 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func getCurrentThread() (h syscall.Handle) {
r0, _, _ := syscall.Syscall(procGetCurrentThread.Addr(), 0, 0, 0, 0)
h = syscall.Handle(r0)
return
}
func lookupPrivilegeValue(systemName string, name string, luid *uint64) (err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(systemName)
if err != nil {
return
}
var _p1 *uint16
_p1, err = syscall.UTF16PtrFromString(name)
if err != nil {
return
}
return _lookupPrivilegeValue(_p0, _p1, luid)
}
func _lookupPrivilegeValue(systemName *uint16, name *uint16, luid *uint64) (err error) {
r1, _, e1 := syscall.Syscall(procLookupPrivilegeValueW.Addr(), 3, uintptr(unsafe.Pointer(systemName)), uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(luid)))
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func lookupPrivilegeName(systemName string, luid *uint64, buffer *uint16, size *uint32) (err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(systemName)
if err != nil {
return
}
return _lookupPrivilegeName(_p0, luid, buffer, size)
}
func _lookupPrivilegeName(systemName *uint16, luid *uint64, buffer *uint16, size *uint32) (err error) {
r1, _, e1 := syscall.Syscall6(procLookupPrivilegeNameW.Addr(), 4, uintptr(unsafe.Pointer(systemName)), uintptr(unsafe.Pointer(luid)), uintptr(unsafe.Pointer(buffer)), uintptr(unsafe.Pointer(size)), 0, 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func lookupPrivilegeDisplayName(systemName string, name *uint16, buffer *uint16, size *uint32, languageId *uint32) (err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(systemName)
if err != nil {
return
}
return _lookupPrivilegeDisplayName(_p0, name, buffer, size, languageId)
}
func _lookupPrivilegeDisplayName(systemName *uint16, name *uint16, buffer *uint16, size *uint32, languageId *uint32) (err error) {
r1, _, e1 := syscall.Syscall6(procLookupPrivilegeDisplayNameW.Addr(), 5, uintptr(unsafe.Pointer(systemName)), uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(buffer)), uintptr(unsafe.Pointer(size)), uintptr(unsafe.Pointer(languageId)), 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func backupRead(h syscall.Handle, b []byte, bytesRead *uint32, abort bool, processSecurity bool, context *uintptr) (err error) {
var _p0 *byte
if len(b) > 0 {
_p0 = &b[0]
}
var _p1 uint32
if abort {
_p1 = 1
} else {
_p1 = 0
}
var _p2 uint32
if processSecurity {
_p2 = 1
} else {
_p2 = 0
}
r1, _, e1 := syscall.Syscall9(procBackupRead.Addr(), 7, uintptr(h), uintptr(unsafe.Pointer(_p0)), uintptr(len(b)), uintptr(unsafe.Pointer(bytesRead)), uintptr(_p1), uintptr(_p2), uintptr(unsafe.Pointer(context)), 0, 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func backupWrite(h syscall.Handle, b []byte, bytesWritten *uint32, abort bool, processSecurity bool, context *uintptr) (err error) {
var _p0 *byte
if len(b) > 0 {
_p0 = &b[0]
}
var _p1 uint32
if abort {
_p1 = 1
} else {
_p1 = 0
}
var _p2 uint32
if processSecurity {
_p2 = 1
} else {
_p2 = 0
}
r1, _, e1 := syscall.Syscall9(procBackupWrite.Addr(), 7, uintptr(h), uintptr(unsafe.Pointer(_p0)), uintptr(len(b)), uintptr(unsafe.Pointer(bytesWritten)), uintptr(_p1), uintptr(_p2), uintptr(unsafe.Pointer(context)), 0, 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}

41
vendor/github.com/Sirupsen/logrus/json_formatter.go generated vendored
View file

@ -1,41 +0,0 @@
package logrus
import (
"encoding/json"
"fmt"
)
type JSONFormatter struct {
// TimestampFormat sets the format used for marshaling timestamps.
TimestampFormat string
}
func (f *JSONFormatter) Format(entry *Entry) ([]byte, error) {
data := make(Fields, len(entry.Data)+3)
for k, v := range entry.Data {
switch v := v.(type) {
case error:
// Otherwise errors are ignored by `encoding/json`
// https://github.com/Sirupsen/logrus/issues/137
data[k] = v.Error()
default:
data[k] = v
}
}
prefixFieldClashes(data)
timestampFormat := f.TimestampFormat
if timestampFormat == "" {
timestampFormat = DefaultTimestampFormat
}
data["time"] = entry.Time.Format(timestampFormat)
data["msg"] = entry.Message
data["level"] = entry.Level.String()
serialized, err := json.Marshal(data)
if err != nil {
return nil, fmt.Errorf("Failed to marshal fields to JSON, %v", err)
}
return append(serialized, '\n'), nil
}

212
vendor/github.com/Sirupsen/logrus/logger.go generated vendored
View file

@ -1,212 +0,0 @@
package logrus
import (
"io"
"os"
"sync"
)
type Logger struct {
// The logs are `io.Copy`'d to this in a mutex. It's common to set this to a
// file, or leave it default which is `os.Stderr`. You can also set this to
// something more adventorous, such as logging to Kafka.
Out io.Writer
// Hooks for the logger instance. These allow firing events based on logging
// levels and log entries. For example, to send errors to an error tracking
// service, log to StatsD or dump the core on fatal errors.
Hooks LevelHooks
// All log entries pass through the formatter before logged to Out. The
// included formatters are `TextFormatter` and `JSONFormatter` for which
// TextFormatter is the default. In development (when a TTY is attached) it
// logs with colors, but to a file it wouldn't. You can easily implement your
// own that implements the `Formatter` interface, see the `README` or included
// formatters for examples.
Formatter Formatter
// The logging level the logger should log at. This is typically (and defaults
// to) `logrus.Info`, which allows Info(), Warn(), Error() and Fatal() to be
// logged. `logrus.Debug` is useful in
Level Level
// Used to sync writing to the log.
mu sync.Mutex
}
// Creates a new logger. Configuration should be set by changing `Formatter`,
// `Out` and `Hooks` directly on the default logger instance. You can also just
// instantiate your own:
//
// var log = &Logger{
// Out: os.Stderr,
// Formatter: new(JSONFormatter),
// Hooks: make(LevelHooks),
// Level: logrus.DebugLevel,
// }
//
// It's recommended to make this a global instance called `log`.
func New() *Logger {
return &Logger{
Out: os.Stderr,
Formatter: new(TextFormatter),
Hooks: make(LevelHooks),
Level: InfoLevel,
}
}
// Adds a field to the log entry, note that you it doesn't log until you call
// Debug, Print, Info, Warn, Fatal or Panic. It only creates a log entry.
// If you want multiple fields, use `WithFields`.
func (logger *Logger) WithField(key string, value interface{}) *Entry {
return NewEntry(logger).WithField(key, value)
}
// Adds a struct of fields to the log entry. All it does is call `WithField` for
// each `Field`.
func (logger *Logger) WithFields(fields Fields) *Entry {
return NewEntry(logger).WithFields(fields)
}
// Add an error as single field to the log entry. All it does is call
// `WithError` for the given `error`.
func (logger *Logger) WithError(err error) *Entry {
return NewEntry(logger).WithError(err)
}
func (logger *Logger) Debugf(format string, args ...interface{}) {
if logger.Level >= DebugLevel {
NewEntry(logger).Debugf(format, args...)
}
}
func (logger *Logger) Infof(format string, args ...interface{}) {
if logger.Level >= InfoLevel {
NewEntry(logger).Infof(format, args...)
}
}
func (logger *Logger) Printf(format string, args ...interface{}) {
NewEntry(logger).Printf(format, args...)
}
func (logger *Logger) Warnf(format string, args ...interface{}) {
if logger.Level >= WarnLevel {
NewEntry(logger).Warnf(format, args...)
}
}
func (logger *Logger) Warningf(format string, args ...interface{}) {
if logger.Level >= WarnLevel {
NewEntry(logger).Warnf(format, args...)
}
}
func (logger *Logger) Errorf(format string, args ...interface{}) {
if logger.Level >= ErrorLevel {
NewEntry(logger).Errorf(format, args...)
}
}
func (logger *Logger) Fatalf(format string, args ...interface{}) {
if logger.Level >= FatalLevel {
NewEntry(logger).Fatalf(format, args...)
}
os.Exit(1)
}
func (logger *Logger) Panicf(format string, args ...interface{}) {
if logger.Level >= PanicLevel {
NewEntry(logger).Panicf(format, args...)
}
}
func (logger *Logger) Debug(args ...interface{}) {
if logger.Level >= DebugLevel {
NewEntry(logger).Debug(args...)
}
}
func (logger *Logger) Info(args ...interface{}) {
if logger.Level >= InfoLevel {
NewEntry(logger).Info(args...)
}
}
func (logger *Logger) Print(args ...interface{}) {
NewEntry(logger).Info(args...)
}
func (logger *Logger) Warn(args ...interface{}) {
if logger.Level >= WarnLevel {
NewEntry(logger).Warn(args...)
}
}
func (logger *Logger) Warning(args ...interface{}) {
if logger.Level >= WarnLevel {
NewEntry(logger).Warn(args...)
}
}
func (logger *Logger) Error(args ...interface{}) {
if logger.Level >= ErrorLevel {
NewEntry(logger).Error(args...)
}
}
func (logger *Logger) Fatal(args ...interface{}) {
if logger.Level >= FatalLevel {
NewEntry(logger).Fatal(args...)
}
os.Exit(1)
}
func (logger *Logger) Panic(args ...interface{}) {
if logger.Level >= PanicLevel {
NewEntry(logger).Panic(args...)
}
}
func (logger *Logger) Debugln(args ...interface{}) {
if logger.Level >= DebugLevel {
NewEntry(logger).Debugln(args...)
}
}
func (logger *Logger) Infoln(args ...interface{}) {
if logger.Level >= InfoLevel {
NewEntry(logger).Infoln(args...)
}
}
func (logger *Logger) Println(args ...interface{}) {
NewEntry(logger).Println(args...)
}
func (logger *Logger) Warnln(args ...interface{}) {
if logger.Level >= WarnLevel {
NewEntry(logger).Warnln(args...)
}
}
func (logger *Logger) Warningln(args ...interface{}) {
if logger.Level >= WarnLevel {
NewEntry(logger).Warnln(args...)
}
}
func (logger *Logger) Errorln(args ...interface{}) {
if logger.Level >= ErrorLevel {
NewEntry(logger).Errorln(args...)
}
}
func (logger *Logger) Fatalln(args ...interface{}) {
if logger.Level >= FatalLevel {
NewEntry(logger).Fatalln(args...)
}
os.Exit(1)
}
func (logger *Logger) Panicln(args ...interface{}) {
if logger.Level >= PanicLevel {
NewEntry(logger).Panicln(args...)
}
}

9
vendor/github.com/Sirupsen/logrus/terminal_bsd.go generated vendored
View file

@ -1,9 +0,0 @@
// +build darwin freebsd openbsd netbsd dragonfly
package logrus
import "syscall"
const ioctlReadTermios = syscall.TIOCGETA
type Termios syscall.Termios

21
vendor/github.com/Sirupsen/logrus/terminal_notwindows.go generated vendored
View file

@ -1,21 +0,0 @@
// Based on ssh/terminal:
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build linux darwin freebsd openbsd netbsd dragonfly
package logrus
import (
"syscall"
"unsafe"
)
// IsTerminal returns true if stderr's file descriptor is a terminal.
func IsTerminal() bool {
fd := syscall.Stderr
var termios Termios
_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
return err == 0
}

15
vendor/github.com/Sirupsen/logrus/terminal_solaris.go generated vendored
View file

@ -1,15 +0,0 @@
// +build solaris
package logrus
import (
"os"
"golang.org/x/sys/unix"
)
// IsTerminal returns true if the given file descriptor is a terminal.
func IsTerminal() bool {
_, err := unix.IoctlGetTermios(int(os.Stdout.Fd()), unix.TCGETA)
return err == nil
}

27
vendor/github.com/Sirupsen/logrus/terminal_windows.go generated vendored
View file

@ -1,27 +0,0 @@
// Based on ssh/terminal:
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build windows
package logrus
import (
"syscall"
"unsafe"
)
var kernel32 = syscall.NewLazyDLL("kernel32.dll")
var (
procGetConsoleMode = kernel32.NewProc("GetConsoleMode")
)
// IsTerminal returns true if stderr's file descriptor is a terminal.
func IsTerminal() bool {
fd := syscall.Stderr
var st uint32
r, _, e := syscall.Syscall(procGetConsoleMode.Addr(), 2, uintptr(fd), uintptr(unsafe.Pointer(&st)), 0)
return r != 0 && e == 0
}

26
vendor/github.com/containerd/console/.travis.yml generated vendored Normal file
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@ -0,0 +1,26 @@
language: go
go:
- 1.9.3
- 1.9.4
- tip
go_import_path: github.com/containerd/console
install:
- go get -d
- GOOS=openbsd go get -d
- GOOS=solaris go get -d
- GOOS=windows go get -d
script:
- go test -race
- GOOS=openbsd go build
- GOOS=openbsd go test -c
- GOOS=solaris go build
- GOOS=solaris go test -c
- GOOS=windows go test
matrix:
allow_failures:
- go: 1.9.4

201
vendor/github.com/containerd/console/LICENSE generated vendored Normal file
View file

@ -0,0 +1,201 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
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"Legal Entity" shall mean the union of the acting entity and all
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control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
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transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
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"Contribution" shall mean any work of authorship, including
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to that Work or Derivative Works thereof, that is intentionally
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communication on electronic mailing lists, source code control systems,
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designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
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2. Grant of Copyright License. Subject to the terms and conditions of
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or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
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as of the date such litigation is filed.
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Work or Derivative Works thereof in any medium, with or without
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meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
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wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
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that such additional attribution notices cannot be construed
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You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
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the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
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risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

17
vendor/github.com/containerd/console/README.md generated vendored Normal file
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@ -0,0 +1,17 @@
# console
[![Build Status](https://travis-ci.org/containerd/console.svg?branch=master)](https://travis-ci.org/containerd/console)
Golang package for dealing with consoles. Light on deps and a simple API.
## Modifying the current process
```go
current := console.Current()
defer current.Reset()
if err := current.SetRaw(); err != nil {
}
ws, err := current.Size()
current.Resize(ws)
```

78
vendor/github.com/containerd/console/console.go generated vendored Normal file
View file

@ -0,0 +1,78 @@
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package console
import (
"errors"
"io"
"os"
)
var ErrNotAConsole = errors.New("provided file is not a console")
type Console interface {
io.Reader
io.Writer
io.Closer
// Resize resizes the console to the provided window size
Resize(WinSize) error
// ResizeFrom resizes the calling console to the size of the
// provided console
ResizeFrom(Console) error
// SetRaw sets the console in raw mode
SetRaw() error
// DisableEcho disables echo on the console
DisableEcho() error
// Reset restores the console to its orignal state
Reset() error
// Size returns the window size of the console
Size() (WinSize, error)
// Fd returns the console's file descriptor
Fd() uintptr
// Name returns the console's file name
Name() string
}
// WinSize specifies the window size of the console
type WinSize struct {
// Height of the console
Height uint16
// Width of the console
Width uint16
x uint16
y uint16
}
// Current returns the current processes console
func Current() Console {
c, err := ConsoleFromFile(os.Stdin)
if err != nil {
// stdin should always be a console for the design
// of this function
panic(err)
}
return c
}
// ConsoleFromFile returns a console using the provided file
func ConsoleFromFile(f *os.File) (Console, error) {
if err := checkConsole(f); err != nil {
return nil, err
}
return newMaster(f)
}

271
vendor/github.com/containerd/console/console_linux.go generated vendored Normal file
View file

@ -0,0 +1,271 @@
// +build linux
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package console
import (
"io"
"os"
"sync"
"golang.org/x/sys/unix"
)
const (
maxEvents = 128
)
// Epoller manages multiple epoll consoles using edge-triggered epoll api so we
// dont have to deal with repeated wake-up of EPOLLER or EPOLLHUP.
// For more details, see:
// - https://github.com/systemd/systemd/pull/4262
// - https://github.com/moby/moby/issues/27202
//
// Example usage of Epoller and EpollConsole can be as follow:
//
// epoller, _ := NewEpoller()
// epollConsole, _ := epoller.Add(console)
// go epoller.Wait()
// var (
// b bytes.Buffer
// wg sync.WaitGroup
// )
// wg.Add(1)
// go func() {
// io.Copy(&b, epollConsole)
// wg.Done()
// }()
// // perform I/O on the console
// epollConsole.Shutdown(epoller.CloseConsole)
// wg.Wait()
// epollConsole.Close()
type Epoller struct {
efd int
mu sync.Mutex
fdMapping map[int]*EpollConsole
}
// NewEpoller returns an instance of epoller with a valid epoll fd.
func NewEpoller() (*Epoller, error) {
efd, err := unix.EpollCreate1(unix.EPOLL_CLOEXEC)
if err != nil {
return nil, err
}
return &Epoller{
efd: efd,
fdMapping: make(map[int]*EpollConsole),
}, nil
}
// Add creates a epoll console based on the provided console. The console will
// be registered with EPOLLET (i.e. using edge-triggered notification) and its
// file descriptor will be set to non-blocking mode. After this, user should use
// the return console to perform I/O.
func (e *Epoller) Add(console Console) (*EpollConsole, error) {
sysfd := int(console.Fd())
// Set sysfd to non-blocking mode
if err := unix.SetNonblock(sysfd, true); err != nil {
return nil, err
}
ev := unix.EpollEvent{
Events: unix.EPOLLIN | unix.EPOLLOUT | unix.EPOLLRDHUP | unix.EPOLLET,
Fd: int32(sysfd),
}
if err := unix.EpollCtl(e.efd, unix.EPOLL_CTL_ADD, sysfd, &ev); err != nil {
return nil, err
}
ef := &EpollConsole{
Console: console,
sysfd: sysfd,
readc: sync.NewCond(&sync.Mutex{}),
writec: sync.NewCond(&sync.Mutex{}),
}
e.mu.Lock()
e.fdMapping[sysfd] = ef
e.mu.Unlock()
return ef, nil
}
// Wait starts the loop to wait for its consoles' notifications and signal
// appropriate console that it can perform I/O.
func (e *Epoller) Wait() error {
events := make([]unix.EpollEvent, maxEvents)
for {
n, err := unix.EpollWait(e.efd, events, -1)
if err != nil {
// EINTR: The call was interrupted by a signal handler before either
// any of the requested events occurred or the timeout expired
if err == unix.EINTR {
continue
}
return err
}
for i := 0; i < n; i++ {
ev := &events[i]
// the console is ready to be read from
if ev.Events&(unix.EPOLLIN|unix.EPOLLHUP|unix.EPOLLERR) != 0 {
if epfile := e.getConsole(int(ev.Fd)); epfile != nil {
epfile.signalRead()
}
}
// the console is ready to be written to
if ev.Events&(unix.EPOLLOUT|unix.EPOLLHUP|unix.EPOLLERR) != 0 {
if epfile := e.getConsole(int(ev.Fd)); epfile != nil {
epfile.signalWrite()
}
}
}
}
}
// Close unregister the console's file descriptor from epoll interface
func (e *Epoller) CloseConsole(fd int) error {
e.mu.Lock()
defer e.mu.Unlock()
delete(e.fdMapping, fd)
return unix.EpollCtl(e.efd, unix.EPOLL_CTL_DEL, fd, &unix.EpollEvent{})
}
func (e *Epoller) getConsole(sysfd int) *EpollConsole {
e.mu.Lock()
f := e.fdMapping[sysfd]
e.mu.Unlock()
return f
}
// Close the epoll fd
func (e *Epoller) Close() error {
return unix.Close(e.efd)
}
// EpollConsole acts like a console but register its file descriptor with a
// epoll fd and uses epoll API to perform I/O.
type EpollConsole struct {
Console
readc *sync.Cond
writec *sync.Cond
sysfd int
closed bool
}
// Read reads up to len(p) bytes into p. It returns the number of bytes read
// (0 <= n <= len(p)) and any error encountered.
//
// If the console's read returns EAGAIN or EIO, we assumes that its a
// temporary error because the other side went away and wait for the signal
// generated by epoll event to continue.
func (ec *EpollConsole) Read(p []byte) (n int, err error) {
var read int
ec.readc.L.Lock()
defer ec.readc.L.Unlock()
for {
read, err = ec.Console.Read(p[n:])
n += read
if err != nil {
var hangup bool
if perr, ok := err.(*os.PathError); ok {
hangup = (perr.Err == unix.EAGAIN || perr.Err == unix.EIO)
} else {
hangup = (err == unix.EAGAIN || err == unix.EIO)
}
// if the other end disappear, assume this is temporary and wait for the
// signal to continue again. Unless we didnt read anything and the
// console is already marked as closed then we should exit
if hangup && !(n == 0 && len(p) > 0 && ec.closed) {
ec.readc.Wait()
continue
}
}
break
}
// if we didnt read anything then return io.EOF to end gracefully
if n == 0 && len(p) > 0 && err == nil {
err = io.EOF
}
// signal for others that we finished the read
ec.readc.Signal()
return n, err
}
// Writes len(p) bytes from p to the console. It returns the number of bytes
// written from p (0 <= n <= len(p)) and any error encountered that caused
// the write to stop early.
//
// If writes to the console returns EAGAIN or EIO, we assumes that its a
// temporary error because the other side went away and wait for the signal
// generated by epoll event to continue.
func (ec *EpollConsole) Write(p []byte) (n int, err error) {
var written int
ec.writec.L.Lock()
defer ec.writec.L.Unlock()
for {
written, err = ec.Console.Write(p[n:])
n += written
if err != nil {
var hangup bool
if perr, ok := err.(*os.PathError); ok {
hangup = (perr.Err == unix.EAGAIN || perr.Err == unix.EIO)
} else {
hangup = (err == unix.EAGAIN || err == unix.EIO)
}
// if the other end disappear, assume this is temporary and wait for the
// signal to continue again.
if hangup {
ec.writec.Wait()
continue
}
}
// unrecoverable error, break the loop and return the error
break
}
if n < len(p) && err == nil {
err = io.ErrShortWrite
}
// signal for others that we finished the write
ec.writec.Signal()
return n, err
}
// Close closed the file descriptor and signal call waiters for this fd.
// It accepts a callback which will be called with the console's fd. The
// callback typically will be used to do further cleanup such as unregister the
// console's fd from the epoll interface.
// User should call Shutdown and wait for all I/O operation to be finished
// before closing the console.
func (ec *EpollConsole) Shutdown(close func(int) error) error {
ec.readc.L.Lock()
defer ec.readc.L.Unlock()
ec.writec.L.Lock()
defer ec.writec.L.Unlock()
ec.readc.Broadcast()
ec.writec.Broadcast()
ec.closed = true
return close(ec.sysfd)
}
// signalRead signals that the console is readable.
func (ec *EpollConsole) signalRead() {
ec.readc.Signal()
}
// signalWrite signals that the console is writable.
func (ec *EpollConsole) signalWrite() {
ec.writec.Signal()
}

88
vendor/github.com/containerd/console/console_linux_test.go generated vendored Normal file
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/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package console
import (
"bytes"
"fmt"
"io"
"os"
"os/exec"
"sync"
"testing"
)
func TestEpollConsole(t *testing.T) {
console, slavePath, err := NewPty()
if err != nil {
t.Fatal(err)
}
defer console.Close()
slave, err := os.OpenFile(slavePath, os.O_RDWR, 0)
if err != nil {
t.Fatal(err)
}
defer slave.Close()
iteration := 10
cmd := exec.Command("sh", "-c", fmt.Sprintf("for x in `seq 1 %d`; do echo -n test; done", iteration))
cmd.Stdin = slave
cmd.Stdout = slave
cmd.Stderr = slave
epoller, err := NewEpoller()
if err != nil {
t.Fatal(err)
}
epollConsole, err := epoller.Add(console)
if err != nil {
t.Fatal(err)
}
go epoller.Wait()
var (
b bytes.Buffer
wg sync.WaitGroup
)
wg.Add(1)
go func() {
io.Copy(&b, epollConsole)
wg.Done()
}()
if err := cmd.Run(); err != nil {
t.Fatal(err)
}
slave.Close()
if err := epollConsole.Shutdown(epoller.CloseConsole); err != nil {
t.Fatal(err)
}
wg.Wait()
if err := epollConsole.Close(); err != nil {
t.Fatal(err)
}
expectedOutput := ""
for i := 0; i < iteration; i++ {
expectedOutput += "test"
}
if out := b.String(); out != expectedOutput {
t.Errorf("unexpected output %q", out)
}
}

100
vendor/github.com/containerd/console/console_test.go generated vendored Normal file
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@ -0,0 +1,100 @@
// +build linux solaris
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package console
import (
"bytes"
"fmt"
"io"
"os"
"os/exec"
"sync"
"testing"
)
func TestWinSize(t *testing.T) {
c, _, err := NewPty()
if err != nil {
t.Fatal(err)
}
defer c.Close()
if err := c.Resize(WinSize{
Width: 11,
Height: 10,
}); err != nil {
t.Error(err)
return
}
size, err := c.Size()
if err != nil {
t.Error(err)
return
}
if size.Width != 11 {
t.Errorf("width should be 11 but received %d", size.Width)
}
if size.Height != 10 {
t.Errorf("height should be 10 but received %d", size.Height)
}
}
func TestConsolePty(t *testing.T) {
console, slavePath, err := NewPty()
if err != nil {
t.Fatal(err)
}
defer console.Close()
slave, err := os.OpenFile(slavePath, os.O_RDWR, 0)
if err != nil {
t.Fatal(err)
}
defer slave.Close()
iteration := 10
cmd := exec.Command("sh", "-c", fmt.Sprintf("for x in `seq 1 %d`; do echo -n test; done", iteration))
cmd.Stdin = slave
cmd.Stdout = slave
cmd.Stderr = slave
var (
b bytes.Buffer
wg sync.WaitGroup
)
wg.Add(1)
go func() {
io.Copy(&b, console)
wg.Done()
}()
if err := cmd.Run(); err != nil {
t.Fatal(err)
}
slave.Close()
wg.Wait()
expectedOutput := ""
for i := 0; i < iteration; i++ {
expectedOutput += "test"
}
if out := b.String(); out != expectedOutput {
t.Errorf("unexpected output %q", out)
}
}

158
vendor/github.com/containerd/console/console_unix.go generated vendored Normal file
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@ -0,0 +1,158 @@
// +build darwin freebsd linux openbsd solaris
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package console
import (
"os"
"golang.org/x/sys/unix"
)
// NewPty creates a new pty pair
// The master is returned as the first console and a string
// with the path to the pty slave is returned as the second
func NewPty() (Console, string, error) {
f, err := os.OpenFile("/dev/ptmx", unix.O_RDWR|unix.O_NOCTTY|unix.O_CLOEXEC, 0)
if err != nil {
return nil, "", err
}
slave, err := ptsname(f)
if err != nil {
return nil, "", err
}
if err := unlockpt(f); err != nil {
return nil, "", err
}
m, err := newMaster(f)
if err != nil {
return nil, "", err
}
return m, slave, nil
}
type master struct {
f *os.File
original *unix.Termios
}
func (m *master) Read(b []byte) (int, error) {
return m.f.Read(b)
}
func (m *master) Write(b []byte) (int, error) {
return m.f.Write(b)
}
func (m *master) Close() error {
return m.f.Close()
}
func (m *master) Resize(ws WinSize) error {
return tcswinsz(m.f.Fd(), ws)
}
func (m *master) ResizeFrom(c Console) error {
ws, err := c.Size()
if err != nil {
return err
}
return m.Resize(ws)
}
func (m *master) Reset() error {
if m.original == nil {
return nil
}
return tcset(m.f.Fd(), m.original)
}
func (m *master) getCurrent() (unix.Termios, error) {
var termios unix.Termios
if err := tcget(m.f.Fd(), &termios); err != nil {
return unix.Termios{}, err
}
return termios, nil
}
func (m *master) SetRaw() error {
rawState, err := m.getCurrent()
if err != nil {
return err
}
rawState = cfmakeraw(rawState)
rawState.Oflag = rawState.Oflag | unix.OPOST
return tcset(m.f.Fd(), &rawState)
}
func (m *master) DisableEcho() error {
rawState, err := m.getCurrent()
if err != nil {
return err
}
rawState.Lflag = rawState.Lflag &^ unix.ECHO
return tcset(m.f.Fd(), &rawState)
}
func (m *master) Size() (WinSize, error) {
return tcgwinsz(m.f.Fd())
}
func (m *master) Fd() uintptr {
return m.f.Fd()
}
func (m *master) Name() string {
return m.f.Name()
}
// checkConsole checks if the provided file is a console
func checkConsole(f *os.File) error {
var termios unix.Termios
if tcget(f.Fd(), &termios) != nil {
return ErrNotAConsole
}
return nil
}
func newMaster(f *os.File) (Console, error) {
m := &master{
f: f,
}
t, err := m.getCurrent()
if err != nil {
return nil, err
}
m.original = &t
return m, nil
}
// ClearONLCR sets the necessary tty_ioctl(4)s to ensure that a pty pair
// created by us acts normally. In particular, a not-very-well-known default of
// Linux unix98 ptys is that they have +onlcr by default. While this isn't a
// problem for terminal emulators, because we relay data from the terminal we
// also relay that funky line discipline.
func ClearONLCR(fd uintptr) error {
return setONLCR(fd, false)
}
// SetONLCR sets the necessary tty_ioctl(4)s to ensure that a pty pair
// created by us acts as intended for a terminal emulator.
func SetONLCR(fd uintptr) error {
return setONLCR(fd, true)
}

216
vendor/github.com/containerd/console/console_windows.go generated vendored Normal file
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/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package console
import (
"fmt"
"os"
"github.com/pkg/errors"
"golang.org/x/sys/windows"
)
var (
vtInputSupported bool
ErrNotImplemented = errors.New("not implemented")
)
func (m *master) initStdios() {
m.in = windows.Handle(os.Stdin.Fd())
if err := windows.GetConsoleMode(m.in, &m.inMode); err == nil {
// Validate that windows.ENABLE_VIRTUAL_TERMINAL_INPUT is supported, but do not set it.
if err = windows.SetConsoleMode(m.in, m.inMode|windows.ENABLE_VIRTUAL_TERMINAL_INPUT); err == nil {
vtInputSupported = true
}
// Unconditionally set the console mode back even on failure because SetConsoleMode
// remembers invalid bits on input handles.
windows.SetConsoleMode(m.in, m.inMode)
} else {
fmt.Printf("failed to get console mode for stdin: %v\n", err)
}
m.out = windows.Handle(os.Stdout.Fd())
if err := windows.GetConsoleMode(m.out, &m.outMode); err == nil {
if err := windows.SetConsoleMode(m.out, m.outMode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING); err == nil {
m.outMode |= windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING
} else {
windows.SetConsoleMode(m.out, m.outMode)
}
} else {
fmt.Printf("failed to get console mode for stdout: %v\n", err)
}
m.err = windows.Handle(os.Stderr.Fd())
if err := windows.GetConsoleMode(m.err, &m.errMode); err == nil {
if err := windows.SetConsoleMode(m.err, m.errMode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING); err == nil {
m.errMode |= windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING
} else {
windows.SetConsoleMode(m.err, m.errMode)
}
} else {
fmt.Printf("failed to get console mode for stderr: %v\n", err)
}
}
type master struct {
in windows.Handle
inMode uint32
out windows.Handle
outMode uint32
err windows.Handle
errMode uint32
}
func (m *master) SetRaw() error {
if err := makeInputRaw(m.in, m.inMode); err != nil {
return err
}
// Set StdOut and StdErr to raw mode, we ignore failures since
// windows.DISABLE_NEWLINE_AUTO_RETURN might not be supported on this version of
// Windows.
windows.SetConsoleMode(m.out, m.outMode|windows.DISABLE_NEWLINE_AUTO_RETURN)
windows.SetConsoleMode(m.err, m.errMode|windows.DISABLE_NEWLINE_AUTO_RETURN)
return nil
}
func (m *master) Reset() error {
for _, s := range []struct {
fd windows.Handle
mode uint32
}{
{m.in, m.inMode},
{m.out, m.outMode},
{m.err, m.errMode},
} {
if err := windows.SetConsoleMode(s.fd, s.mode); err != nil {
return errors.Wrap(err, "unable to restore console mode")
}
}
return nil
}
func (m *master) Size() (WinSize, error) {
var info windows.ConsoleScreenBufferInfo
err := windows.GetConsoleScreenBufferInfo(m.out, &info)
if err != nil {
return WinSize{}, errors.Wrap(err, "unable to get console info")
}
winsize := WinSize{
Width: uint16(info.Window.Right - info.Window.Left + 1),
Height: uint16(info.Window.Bottom - info.Window.Top + 1),
}
return winsize, nil
}
func (m *master) Resize(ws WinSize) error {
return ErrNotImplemented
}
func (m *master) ResizeFrom(c Console) error {
return ErrNotImplemented
}
func (m *master) DisableEcho() error {
mode := m.inMode &^ windows.ENABLE_ECHO_INPUT
mode |= windows.ENABLE_PROCESSED_INPUT
mode |= windows.ENABLE_LINE_INPUT
if err := windows.SetConsoleMode(m.in, mode); err != nil {
return errors.Wrap(err, "unable to set console to disable echo")
}
return nil
}
func (m *master) Close() error {
return nil
}
func (m *master) Read(b []byte) (int, error) {
panic("not implemented on windows")
}
func (m *master) Write(b []byte) (int, error) {
panic("not implemented on windows")
}
func (m *master) Fd() uintptr {
return uintptr(m.in)
}
// on windows, console can only be made from os.Std{in,out,err}, hence there
// isnt a single name here we can use. Return a dummy "console" value in this
// case should be sufficient.
func (m *master) Name() string {
return "console"
}
// makeInputRaw puts the terminal (Windows Console) connected to the given
// file descriptor into raw mode
func makeInputRaw(fd windows.Handle, mode uint32) error {
// See
// -- https://msdn.microsoft.com/en-us/library/windows/desktop/ms686033(v=vs.85).aspx
// -- https://msdn.microsoft.com/en-us/library/windows/desktop/ms683462(v=vs.85).aspx
// Disable these modes
mode &^= windows.ENABLE_ECHO_INPUT
mode &^= windows.ENABLE_LINE_INPUT
mode &^= windows.ENABLE_MOUSE_INPUT
mode &^= windows.ENABLE_WINDOW_INPUT
mode &^= windows.ENABLE_PROCESSED_INPUT
// Enable these modes
mode |= windows.ENABLE_EXTENDED_FLAGS
mode |= windows.ENABLE_INSERT_MODE
mode |= windows.ENABLE_QUICK_EDIT_MODE
if vtInputSupported {
mode |= windows.ENABLE_VIRTUAL_TERMINAL_INPUT
}
if err := windows.SetConsoleMode(fd, mode); err != nil {
return errors.Wrap(err, "unable to set console to raw mode")
}
return nil
}
func checkConsole(f *os.File) error {
var mode uint32
if err := windows.GetConsoleMode(windows.Handle(f.Fd()), &mode); err != nil {
return err
}
return nil
}
func newMaster(f *os.File) (Console, error) {
if f != os.Stdin && f != os.Stdout && f != os.Stderr {
return nil, errors.New("creating a console from a file is not supported on windows")
}
m := &master{}
m.initStdios()
return m, nil
}

53
vendor/github.com/containerd/console/tc_darwin.go generated vendored Normal file
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@ -0,0 +1,53 @@
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package console
import (
"fmt"
"os"
"unsafe"
"golang.org/x/sys/unix"
)
const (
cmdTcGet = unix.TIOCGETA
cmdTcSet = unix.TIOCSETA
)
func ioctl(fd, flag, data uintptr) error {
if _, _, err := unix.Syscall(unix.SYS_IOCTL, fd, flag, data); err != 0 {
return err
}
return nil
}
// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
// unlockpt should be called before opening the slave side of a pty.
func unlockpt(f *os.File) error {
var u int32
return ioctl(f.Fd(), unix.TIOCPTYUNLK, uintptr(unsafe.Pointer(&u)))
}
// ptsname retrieves the name of the first available pts for the given master.
func ptsname(f *os.File) (string, error) {
n, err := unix.IoctlGetInt(int(f.Fd()), unix.TIOCPTYGNAME)
if err != nil {
return "", err
}
return fmt.Sprintf("/dev/pts/%d", n), nil
}

45
vendor/github.com/containerd/console/tc_freebsd.go generated vendored Normal file
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@ -0,0 +1,45 @@
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package console
import (
"fmt"
"os"
"golang.org/x/sys/unix"
)
const (
cmdTcGet = unix.TIOCGETA
cmdTcSet = unix.TIOCSETA
)
// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
// unlockpt should be called before opening the slave side of a pty.
// This does not exist on FreeBSD, it does not allocate controlling terminals on open
func unlockpt(f *os.File) error {
return nil
}
// ptsname retrieves the name of the first available pts for the given master.
func ptsname(f *os.File) (string, error) {
n, err := unix.IoctlGetInt(int(f.Fd()), unix.TIOCGPTN)
if err != nil {
return "", err
}
return fmt.Sprintf("/dev/pts/%d", n), nil
}

49
vendor/github.com/containerd/console/tc_linux.go generated vendored Normal file
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@ -0,0 +1,49 @@
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package console
import (
"fmt"
"os"
"unsafe"
"golang.org/x/sys/unix"
)
const (
cmdTcGet = unix.TCGETS
cmdTcSet = unix.TCSETS
)
// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
// unlockpt should be called before opening the slave side of a pty.
func unlockpt(f *os.File) error {
var u int32
if _, _, err := unix.Syscall(unix.SYS_IOCTL, f.Fd(), unix.TIOCSPTLCK, uintptr(unsafe.Pointer(&u))); err != 0 {
return err
}
return nil
}
// ptsname retrieves the name of the first available pts for the given master.
func ptsname(f *os.File) (string, error) {
var u uint32
if _, _, err := unix.Syscall(unix.SYS_IOCTL, f.Fd(), unix.TIOCGPTN, uintptr(unsafe.Pointer(&u))); err != 0 {
return "", err
}
return fmt.Sprintf("/dev/pts/%d", u), nil
}

51
vendor/github.com/containerd/console/tc_openbsd_cgo.go generated vendored Normal file
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@ -0,0 +1,51 @@
// +build openbsd,cgo
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package console
import (
"os"
"golang.org/x/sys/unix"
)
//#include <stdlib.h>
import "C"
const (
cmdTcGet = unix.TIOCGETA
cmdTcSet = unix.TIOCSETA
)
// ptsname retrieves the name of the first available pts for the given master.
func ptsname(f *os.File) (string, error) {
ptspath, err := C.ptsname(C.int(f.Fd()))
if err != nil {
return "", err
}
return C.GoString(ptspath), nil
}
// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
// unlockpt should be called before opening the slave side of a pty.
func unlockpt(f *os.File) error {
if _, err := C.grantpt(C.int(f.Fd())); err != nil {
return err
}
return nil
}

47
vendor/github.com/containerd/console/tc_openbsd_nocgo.go generated vendored Normal file
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@ -0,0 +1,47 @@
// +build openbsd,!cgo
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
//
// Implementing the functions below requires cgo support. Non-cgo stubs
// versions are defined below to enable cross-compilation of source code
// that depends on these functions, but the resultant cross-compiled
// binaries cannot actually be used. If the stub function(s) below are
// actually invoked they will display an error message and cause the
// calling process to exit.
//
package console
import (
"os"
"golang.org/x/sys/unix"
)
const (
cmdTcGet = unix.TIOCGETA
cmdTcSet = unix.TIOCSETA
)
func ptsname(f *os.File) (string, error) {
panic("ptsname() support requires cgo.")
}
func unlockpt(f *os.File) error {
panic("unlockpt() support requires cgo.")
}

51
vendor/github.com/containerd/console/tc_solaris_cgo.go generated vendored Normal file
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@ -0,0 +1,51 @@
// +build solaris,cgo
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package console
import (
"os"
"golang.org/x/sys/unix"
)
//#include <stdlib.h>
import "C"
const (
cmdTcGet = unix.TCGETS
cmdTcSet = unix.TCSETS
)
// ptsname retrieves the name of the first available pts for the given master.
func ptsname(f *os.File) (string, error) {
ptspath, err := C.ptsname(C.int(f.Fd()))
if err != nil {
return "", err
}
return C.GoString(ptspath), nil
}
// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
// unlockpt should be called before opening the slave side of a pty.
func unlockpt(f *os.File) error {
if _, err := C.grantpt(C.int(f.Fd())); err != nil {
return err
}
return nil
}

47
vendor/github.com/containerd/console/tc_solaris_nocgo.go generated vendored Normal file
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@ -0,0 +1,47 @@
// +build solaris,!cgo
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
//
// Implementing the functions below requires cgo support. Non-cgo stubs
// versions are defined below to enable cross-compilation of source code
// that depends on these functions, but the resultant cross-compiled
// binaries cannot actually be used. If the stub function(s) below are
// actually invoked they will display an error message and cause the
// calling process to exit.
//
package console
import (
"os"
"golang.org/x/sys/unix"
)
const (
cmdTcGet = unix.TCGETS
cmdTcSet = unix.TCSETS
)
func ptsname(f *os.File) (string, error) {
panic("ptsname() support requires cgo.")
}
func unlockpt(f *os.File) error {
panic("unlockpt() support requires cgo.")
}

91
vendor/github.com/containerd/console/tc_unix.go generated vendored Normal file
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@ -0,0 +1,91 @@
// +build darwin freebsd linux openbsd solaris
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package console
import (
"golang.org/x/sys/unix"
)
func tcget(fd uintptr, p *unix.Termios) error {
termios, err := unix.IoctlGetTermios(int(fd), cmdTcGet)
if err != nil {
return err
}
*p = *termios
return nil
}
func tcset(fd uintptr, p *unix.Termios) error {
return unix.IoctlSetTermios(int(fd), cmdTcSet, p)
}
func tcgwinsz(fd uintptr) (WinSize, error) {
var ws WinSize
uws, err := unix.IoctlGetWinsize(int(fd), unix.TIOCGWINSZ)
if err != nil {
return ws, err
}
// Translate from unix.Winsize to console.WinSize
ws.Height = uws.Row
ws.Width = uws.Col
ws.x = uws.Xpixel
ws.y = uws.Ypixel
return ws, nil
}
func tcswinsz(fd uintptr, ws WinSize) error {
// Translate from console.WinSize to unix.Winsize
var uws unix.Winsize
uws.Row = ws.Height
uws.Col = ws.Width
uws.Xpixel = ws.x
uws.Ypixel = ws.y
return unix.IoctlSetWinsize(int(fd), unix.TIOCSWINSZ, &uws)
}
func setONLCR(fd uintptr, enable bool) error {
var termios unix.Termios
if err := tcget(fd, &termios); err != nil {
return err
}
if enable {
// Set +onlcr so we can act like a real terminal
termios.Oflag |= unix.ONLCR
} else {
// Set -onlcr so we don't have to deal with \r.
termios.Oflag &^= unix.ONLCR
}
return tcset(fd, &termios)
}
func cfmakeraw(t unix.Termios) unix.Termios {
t.Iflag &^= (unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON)
t.Oflag &^= unix.OPOST
t.Lflag &^= (unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN)
t.Cflag &^= (unix.CSIZE | unix.PARENB)
t.Cflag &^= unix.CS8
t.Cc[unix.VMIN] = 1
t.Cc[unix.VTIME] = 0
return t
}

25
vendor/github.com/containerd/continuity/.gitignore generated vendored Normal file
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@ -0,0 +1,25 @@
# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
bin
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe
*.test
*.prof

1
vendor/github.com/containerd/continuity/.mailmap generated vendored Normal file
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@ -0,0 +1 @@
Stephen J Day <stephen.day@docker.com> Stephen Day <stevvooe@users.noreply.github.com>

21
vendor/github.com/containerd/continuity/.travis.yml generated vendored Normal file
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@ -0,0 +1,21 @@
language: go
sudo: required
go:
- 1.8.x
- 1.9.x
- tip
go_import_path: github.com/containerd/continuity
env:
# NOTE: we cannot set GOOS directly (because gimme overrides the value)
- TRAVIS_GOOS=windows
- TRAVIS_GOOS=linux
- TRAVIS_GOOS=darwin
script:
- export GOOS=${TRAVIS_GOOS}
- make build binaries
- if [ "$GOOS" = "linux" ]; then make vet test; fi
- if [ "$GOOS" != "linux" ]; then make test-compile; fi

16
vendor/github.com/containerd/continuity/AUTHORS generated vendored Normal file
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@ -0,0 +1,16 @@
Aaron Lehmann <aaron.lehmann@docker.com>
Akash Gupta <akagup@microsoft.com>
Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
Andrew Pennebaker <apennebaker@datapipe.com>
Brandon Philips <brandon.philips@coreos.com>
Christopher Jones <tophj@linux.vnet.ibm.com>
Daniel, Dao Quang Minh <dqminh89@gmail.com>
Derek McGowan <derek@mcgstyle.net>
Edward Pilatowicz <edward.pilatowicz@oracle.com>
Ian Campbell <ijc@docker.com>
Justin Cormack <justin.cormack@docker.com>
Justin Cummins <sul3n3t@gmail.com>
Phil Estes <estesp@gmail.com>
Stephen J Day <stephen.day@docker.com>
Tobias Klauser <tklauser@distanz.ch>
Tonis Tiigi <tonistiigi@gmail.com>

202
vendor/github.com/containerd/continuity/LICENSE generated vendored Normal file
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@ -0,0 +1,202 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
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"Licensor" shall mean the copyright owner or entity authorized by
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"Legal Entity" shall mean the union of the acting entity and all
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direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
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"Contribution" shall mean any work of authorship, including
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5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
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the terms of any separate license agreement you may have executed
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6. Trademarks. This License does not grant permission to use the trade
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7. Disclaimer of Warranty. Unless required by applicable law or
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8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
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work stoppage, computer failure or malfunction, or any and all
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the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "{}"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
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file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
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Copyright {yyyy} {name of copyright owner}
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

68
vendor/github.com/containerd/continuity/Makefile generated vendored Normal file
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@ -0,0 +1,68 @@
# Set an output prefix, which is the local directory if not specified
PREFIX?=$(shell pwd)
# Used to populate version variable in main package.
VERSION=$(shell git describe --match 'v[0-9]*' --dirty='.m' --always)
GO_LDFLAGS=-ldflags "-X `go list ./version`.Version=$(VERSION)"
PACKAGES=$(shell go list ./... | grep -v /vendor/)
.PHONY: clean all fmt vet lint build test binaries setup
.DEFAULT: default
# skip lint at the moment
all: AUTHORS clean fmt vet fmt build test binaries
AUTHORS: .mailmap .git/HEAD
git log --format='%aN <%aE>' | sort -fu > $@
# This only needs to be generated by hand when cutting full releases.
version/version.go:
./version/version.sh > $@
${PREFIX}/bin/continuity: version/version.go $(shell find . -type f -name '*.go')
@echo "+ $@"
@go build -o $@ ${GO_LDFLAGS} ${GO_GCFLAGS} ./cmd/continuity
setup:
@echo "+ $@"
@go get -u github.com/golang/lint/golint
generate:
go generate $(PACKAGES)
# Depends on binaries because vet will silently fail if it can't load compiled
# imports
vet: binaries
@echo "+ $@"
@go vet $(PACKAGES)
fmt:
@echo "+ $@"
@test -z "$$(gofmt -s -l . | grep -v Godeps/_workspace/src/ | grep -v vendor/ | tee /dev/stderr)" || \
echo "+ please format Go code with 'gofmt -s'"
lint:
@echo "+ $@"
@test -z "$$(golint $(PACKAGES) | grep -v Godeps/_workspace/src/ | grep -v vendor/ |tee /dev/stderr)"
build:
@echo "+ $@"
@go build -v ${GO_LDFLAGS} $(PACKAGES)
test:
@echo "+ $@"
@go test $(PACKAGES)
test-compile:
@echo "+ $@"
@for pkg in $(PACKAGES); do go test -c $$pkg; done
binaries: ${PREFIX}/bin/continuity
@echo "+ $@"
@if [ x$$GOOS = xwindows ]; then echo "+ continuity -> continuity.exe"; mv ${PREFIX}/bin/continuity ${PREFIX}/bin/continuity.exe; fi
clean:
@echo "+ $@"
@rm -rf "${PREFIX}/bin/continuity" "${PREFIX}/bin/continuity.exe"

74
vendor/github.com/containerd/continuity/README.md generated vendored Normal file
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# continuity
[![GoDoc](https://godoc.org/github.com/containerd/continuity?status.svg)](https://godoc.org/github.com/containerd/continuity)
[![Build Status](https://travis-ci.org/containerd/continuity.svg?branch=master)](https://travis-ci.org/containerd/continuity)
A transport-agnostic, filesystem metadata manifest system
This project is a staging area for experiments in providing transport agnostic
metadata storage.
Please see https://github.com/opencontainers/specs/issues/11 for more details.
## Manifest Format
A continuity manifest encodes filesystem metadata in Protocol Buffers.
Please refer to [proto/manifest.proto](proto/manifest.proto).
## Usage
Build:
```console
$ make
```
Create a manifest (of this repo itself):
```console
$ ./bin/continuity build . > /tmp/a.pb
```
Dump a manifest:
```console
$ ./bin/continuity ls /tmp/a.pb
...
-rw-rw-r-- 270 B /.gitignore
-rw-rw-r-- 88 B /.mailmap
-rw-rw-r-- 187 B /.travis.yml
-rw-rw-r-- 359 B /AUTHORS
-rw-rw-r-- 11 kB /LICENSE
-rw-rw-r-- 1.5 kB /Makefile
...
-rw-rw-r-- 986 B /testutil_test.go
drwxrwxr-x 0 B /version
-rw-rw-r-- 478 B /version/version.go
```
Verify a manifest:
```console
$ ./bin/continuity verify . /tmp/a.pb
```
Break the directory and restore using the manifest:
```console
$ chmod 777 Makefile
$ ./bin/continuity verify . /tmp/a.pb
2017/06/23 08:00:34 error verifying manifest: resource "/Makefile" has incorrect mode: -rwxrwxrwx != -rw-rw-r--
$ ./bin/continuity apply . /tmp/a.pb
$ stat -c %a Makefile
664
$ ./bin/continuity verify . /tmp/a.pb
```
## Contribution Guide
### Building Proto Package
If you change the proto file you will need to rebuild the generated Go with `go generate`.
```console
$ go generate ./proto
```

11
vendor/github.com/containerd/continuity/cmd/continuity/main.go generated vendored Normal file
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@ -0,0 +1,11 @@
package main
import (
_ "crypto/sha256"
"github.com/containerd/continuity/commands"
)
func main() {
commands.MainCmd.Execute()
}

36
vendor/github.com/containerd/continuity/commands/apply.go generated vendored Normal file
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@ -0,0 +1,36 @@
package commands
import (
"io/ioutil"
"log"
"github.com/containerd/continuity"
"github.com/spf13/cobra"
)
var ApplyCmd = &cobra.Command{
Use: "apply <root> [<manifest>]",
Short: "Apply the manifest to the provided root",
Run: func(cmd *cobra.Command, args []string) {
root, path := args[0], args[1]
p, err := ioutil.ReadFile(path)
if err != nil {
log.Fatalf("error reading manifest: %v", err)
}
m, err := continuity.Unmarshal(p)
if err != nil {
log.Fatalf("error unmarshaling manifest: %v", err)
}
ctx, err := continuity.NewContext(root)
if err != nil {
log.Fatalf("error getting context: %v", err)
}
if err := continuity.ApplyManifest(ctx, m); err != nil {
log.Fatalf("error applying manifest: %v", err)
}
},
}

48
vendor/github.com/containerd/continuity/commands/build.go generated vendored Normal file
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@ -0,0 +1,48 @@
package commands
import (
"log"
"os"
"github.com/containerd/continuity"
"github.com/spf13/cobra"
)
var (
buildCmdConfig struct {
format string
}
BuildCmd = &cobra.Command{
Use: "build <root>",
Short: "Build a manifest for the provided root",
Run: func(cmd *cobra.Command, args []string) {
if len(args) != 1 {
log.Fatalln("please specify a root")
}
ctx, err := continuity.NewContext(args[0])
if err != nil {
log.Fatalf("error creating path context: %v", err)
}
m, err := continuity.BuildManifest(ctx)
if err != nil {
log.Fatalf("error generating manifest: %v", err)
}
p, err := continuity.Marshal(m)
if err != nil {
log.Fatalf("error marshaling manifest: %v", err)
}
if _, err := os.Stdout.Write(p); err != nil {
log.Fatalf("error writing to stdout: %v", err)
}
},
}
)
func init() {
BuildCmd.Flags().StringVar(&buildCmdConfig.format, "format", "pb", "specify the output format of the manifest")
}

44
vendor/github.com/containerd/continuity/commands/dump.go generated vendored Normal file
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@ -0,0 +1,44 @@
package commands
import (
"io/ioutil"
"log"
"os"
pb "github.com/containerd/continuity/proto"
"github.com/golang/protobuf/proto"
"github.com/spf13/cobra"
)
var DumpCmd = &cobra.Command{
Use: "dump <manifest>",
Short: "Dump the contents of the manifest in protobuf text format",
Run: func(cmd *cobra.Command, args []string) {
var p []byte
var err error
if len(args) < 1 {
p, err = ioutil.ReadAll(os.Stdin)
if err != nil {
log.Fatalf("error reading manifest: %v", err)
}
} else {
p, err = ioutil.ReadFile(args[0])
if err != nil {
log.Fatalf("error reading manifest: %v", err)
}
}
var bm pb.Manifest
if err := proto.Unmarshal(p, &bm); err != nil {
log.Fatalf("error unmarshaling manifest: %v", err)
}
// TODO(stevvooe): For now, just dump the text format. Turn this into
// nice text output later.
if err := proto.MarshalText(os.Stdout, &bm); err != nil {
log.Fatalf("error dumping manifest: %v", err)
}
},
}

41
vendor/github.com/containerd/continuity/commands/ls.go generated vendored Normal file
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@ -0,0 +1,41 @@
package commands
import (
"fmt"
"log"
"os"
"text/tabwriter"
"github.com/dustin/go-humanize"
"github.com/spf13/cobra"
)
var LSCmd = &cobra.Command{
Use: "ls <manifest>",
Short: "List the contents of the manifest.",
Run: func(cmd *cobra.Command, args []string) {
if len(args) != 1 {
log.Fatalln("please specify a manifest")
}
bm, err := readManifestFile(args[0])
if err != nil {
log.Fatalf("error reading manifest: %v", err)
}
w := tabwriter.NewWriter(os.Stdout, 0, 2, 2, ' ', 0)
for _, entry := range bm.Resource {
for _, path := range entry.Path {
if os.FileMode(entry.Mode)&os.ModeSymlink != 0 {
fmt.Fprintf(w, "%v\t%v\t%v\t%v\t%v -> %v\n", os.FileMode(entry.Mode), entry.User, entry.Group, humanize.Bytes(uint64(entry.Size)), path, entry.Target)
} else {
fmt.Fprintf(w, "%v\t%v\t%v\t%v\t%v\n", os.FileMode(entry.Mode), entry.User, entry.Group, humanize.Bytes(uint64(entry.Size)), path)
}
}
}
w.Flush()
},
}

82
vendor/github.com/containerd/continuity/commands/main.go generated vendored Normal file
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package commands
import (
"io"
"io/ioutil"
"os"
"text/tabwriter"
pb "github.com/containerd/continuity/proto"
"github.com/golang/protobuf/proto"
"github.com/spf13/cobra"
)
var (
MainCmd = &cobra.Command{
Use: "continuity <command>",
Short: "A transport-agnostic filesytem metadata tool.",
}
// usageTemplate is nearly identical to the default template without the
// automatic addition of flags. Instead, Command.Use is used unmodified.
usageTemplate = `Usage:{{if .Runnable}}
{{.UseLine}}{{end}}{{if .HasSubCommands}}
{{ .CommandPath}} [command]{{end}}{{if gt .Aliases 0}}
Aliases:
{{.NameAndAliases}}
{{end}}{{if .HasExample}}
Examples:
{{ .Example }}{{end}}{{ if .HasAvailableSubCommands}}
Available Commands:{{range .Commands}}{{if .IsAvailableCommand}}
{{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{end}}{{ if .HasLocalFlags}}
Flags:
{{.LocalFlags.FlagUsages | trimRightSpace}}{{end}}{{ if .HasInheritedFlags}}
Global Flags:
{{.InheritedFlags.FlagUsages | trimRightSpace}}{{end}}{{if .HasHelpSubCommands}}
Additional help topics:{{range .Commands}}{{if .IsHelpCommand}}
{{rpad .CommandPath .CommandPathPadding}} {{.Short}}{{end}}{{end}}{{end}}{{ if .HasSubCommands }}
Use "{{.CommandPath}} [command] --help" for more information about a command.{{end}}
`
)
func init() {
MainCmd.AddCommand(BuildCmd)
MainCmd.AddCommand(VerifyCmd)
MainCmd.AddCommand(ApplyCmd)
MainCmd.AddCommand(LSCmd)
MainCmd.AddCommand(StatsCmd)
MainCmd.AddCommand(DumpCmd)
if MountCmd != nil {
MainCmd.AddCommand(MountCmd)
}
MainCmd.SetUsageTemplate(usageTemplate)
}
// readManifestFile reads the manifest from the given path. This should
// probably be provided by the continuity library.
func readManifestFile(path string) (*pb.Manifest, error) {
p, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
var bm pb.Manifest
if err := proto.Unmarshal(p, &bm); err != nil {
return nil, err
}
return &bm, nil
}
// newTabwriter provides a common tabwriter with defaults.
func newTabwriter(w io.Writer) *tabwriter.Writer {
return tabwriter.NewWriter(os.Stdout, 0, 2, 2, ' ', 0)
}

115
vendor/github.com/containerd/continuity/commands/mount.go generated vendored Normal file
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// +build linux darwin freebsd
package commands
import (
"io/ioutil"
"log"
"os"
"os/signal"
"path/filepath"
"syscall"
"time"
"bazil.org/fuse"
"bazil.org/fuse/fs"
"github.com/containerd/continuity"
"github.com/containerd/continuity/continuityfs"
"github.com/containerd/continuity/driver"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
var MountCmd = &cobra.Command{
Use: "mount <mountpoint> [<manifest>] [<source directory>]",
Short: "Mount the manifest to the provided mountpoint using content from a source directory",
Run: func(cmd *cobra.Command, args []string) {
if len(args) != 3 {
log.Fatal("Must specify mountpoint, manifest, and source directory")
}
mountpoint := args[0]
manifest, source := args[1], args[2]
manifestName := filepath.Base(manifest)
p, err := ioutil.ReadFile(manifest)
if err != nil {
log.Fatalf("error reading manifest: %v", err)
}
m, err := continuity.Unmarshal(p)
if err != nil {
log.Fatalf("error unmarshaling manifest: %v", err)
}
driver, err := driver.NewSystemDriver()
if err != nil {
logrus.Fatal(err)
}
provider := continuityfs.NewFSFileContentProvider(source, driver)
contfs, err := continuityfs.NewFSFromManifest(m, mountpoint, provider)
if err != nil {
logrus.Fatal(err)
}
c, err := fuse.Mount(
mountpoint,
fuse.ReadOnly(),
fuse.FSName(manifestName),
fuse.Subtype("continuity"),
// OSX Only options
fuse.LocalVolume(),
fuse.VolumeName("Continuity FileSystem"),
)
if err != nil {
logrus.Fatal(err)
}
<-c.Ready
if err := c.MountError; err != nil {
c.Close()
logrus.Fatal(err)
}
errChan := make(chan error, 1)
go func() {
// TODO: Create server directory to use context
err = fs.Serve(c, contfs)
if err != nil {
errChan <- err
}
}()
sigChan := make(chan os.Signal, 1)
signal.Notify(sigChan, os.Interrupt)
signal.Notify(sigChan, syscall.SIGTERM)
select {
case <-sigChan:
logrus.Infof("Shutting down")
case err = <-errChan:
}
go func() {
if err := c.Close(); err != nil {
logrus.Errorf("Unable to close connection %s", err)
}
}()
// Wait for any inprogress requests to be handled
time.Sleep(time.Second)
logrus.Infof("Attempting unmount")
if err := fuse.Unmount(mountpoint); err != nil {
logrus.Errorf("Error unmounting %s: %v", mountpoint, err)
}
// Handle server error
if err != nil {
logrus.Fatalf("Error serving fuse server: %v", err)
}
},
}

9
vendor/github.com/containerd/continuity/commands/mount_unsupported.go generated vendored Normal file
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// +build windows solaris
package commands
import (
"github.com/spf13/cobra"
)
var MountCmd *cobra.Command = nil

58
vendor/github.com/containerd/continuity/commands/stats.go generated vendored Normal file
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package commands
import (
"fmt"
"log"
"os"
"github.com/dustin/go-humanize"
"github.com/spf13/cobra"
)
var (
StatsCmd = &cobra.Command{
Use: "stats <manifest>",
Short: "display statistics about the specified manifest",
Run: func(cmd *cobra.Command, args []string) {
if len(args) != 1 {
log.Fatalln("please specify a manifest")
}
bm, err := readManifestFile(args[0])
if err != nil {
log.Fatalf("error reading manifest: %v", err)
}
var stats struct {
resources int
files int
directories int
totalSize int64
symlinks int
}
for _, entry := range bm.Resource {
stats.resources++
stats.totalSize += int64(entry.Size)
mode := os.FileMode(entry.Mode)
if mode.IsRegular() {
stats.files += len(entry.Path) // count hardlinks!
} else if mode.IsDir() {
stats.directories++
} else if mode&os.ModeSymlink != 0 {
stats.symlinks++
}
}
w := newTabwriter(os.Stdout)
defer w.Flush()
fmt.Fprintf(w, "resources\t%v\n", stats.resources)
fmt.Fprintf(w, "directories\t%v\n", stats.directories)
fmt.Fprintf(w, "files\t%v\n", stats.files)
fmt.Fprintf(w, "symlinks\t%v\n", stats.symlinks)
fmt.Fprintf(w, "size\t%v\n", humanize.Bytes(uint64(stats.totalSize)))
},
}
)

41
vendor/github.com/containerd/continuity/commands/verify.go generated vendored Normal file
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package commands
import (
"io/ioutil"
"log"
"github.com/containerd/continuity"
"github.com/spf13/cobra"
)
var VerifyCmd = &cobra.Command{
Use: "verify <root> [<manifest>]",
Short: "Verify the root against the provided manifest",
Run: func(cmd *cobra.Command, args []string) {
if len(args) != 2 {
log.Fatalln("please specify a root and manifest")
}
root, path := args[0], args[1]
p, err := ioutil.ReadFile(path)
if err != nil {
log.Fatalf("error reading manifest: %v", err)
}
m, err := continuity.Unmarshal(p)
if err != nil {
log.Fatalf("error unmarshaling manifest: %v", err)
}
ctx, err := continuity.NewContext(root)
if err != nil {
log.Fatalf("error getting context: %v", err)
}
if err := continuity.VerifyManifest(ctx, m); err != nil {
// TODO(stevvooe): Support more interesting error reporting.
log.Fatalf("error verifying manifest: %v", err)
}
},
}

641
vendor/github.com/containerd/continuity/context.go generated vendored Normal file
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package continuity
import (
"bytes"
"fmt"
"io"
"log"
"os"
"path/filepath"
"strings"
"github.com/containerd/continuity/devices"
driverpkg "github.com/containerd/continuity/driver"
"github.com/containerd/continuity/pathdriver"
"github.com/opencontainers/go-digest"
)
var (
ErrNotFound = fmt.Errorf("not found")
ErrNotSupported = fmt.Errorf("not supported")
)
// Context represents a file system context for accessing resources. The
// responsibility of the context is to convert system specific resources to
// generic Resource objects. Most of this is safe path manipulation, as well
// as extraction of resource details.
type Context interface {
Apply(Resource) error
Verify(Resource) error
Resource(string, os.FileInfo) (Resource, error)
Walk(filepath.WalkFunc) error
}
// SymlinkPath is intended to give the symlink target value
// in a root context. Target and linkname are absolute paths
// not under the given root.
type SymlinkPath func(root, linkname, target string) (string, error)
type ContextOptions struct {
Digester Digester
Driver driverpkg.Driver
PathDriver pathdriver.PathDriver
Provider ContentProvider
}
// context represents a file system context for accessing resources.
// Generally, all path qualified access and system considerations should land
// here.
type context struct {
driver driverpkg.Driver
pathDriver pathdriver.PathDriver
root string
digester Digester
provider ContentProvider
}
// NewContext returns a Context associated with root. The default driver will
// be used, as returned by NewDriver.
func NewContext(root string) (Context, error) {
return NewContextWithOptions(root, ContextOptions{})
}
// NewContextWithOptions returns a Context associate with the root.
func NewContextWithOptions(root string, options ContextOptions) (Context, error) {
// normalize to absolute path
pathDriver := options.PathDriver
if pathDriver == nil {
pathDriver = pathdriver.LocalPathDriver
}
root = pathDriver.FromSlash(root)
root, err := pathDriver.Abs(pathDriver.Clean(root))
if err != nil {
return nil, err
}
driver := options.Driver
if driver == nil {
driver, err = driverpkg.NewSystemDriver()
if err != nil {
return nil, err
}
}
digester := options.Digester
if digester == nil {
digester = simpleDigester{digest.Canonical}
}
// Check the root directory. Need to be a little careful here. We are
// allowing a link for now, but this may have odd behavior when
// canonicalizing paths. As long as all files are opened through the link
// path, this should be okay.
fi, err := driver.Stat(root)
if err != nil {
return nil, err
}
if !fi.IsDir() {
return nil, &os.PathError{Op: "NewContext", Path: root, Err: os.ErrInvalid}
}
return &context{
root: root,
driver: driver,
pathDriver: pathDriver,
digester: digester,
provider: options.Provider,
}, nil
}
// Resource returns the resource as path p, populating the entry with info
// from fi. The path p should be the path of the resource in the context,
// typically obtained through Walk or from the value of Resource.Path(). If fi
// is nil, it will be resolved.
func (c *context) Resource(p string, fi os.FileInfo) (Resource, error) {
fp, err := c.fullpath(p)
if err != nil {
return nil, err
}
if fi == nil {
fi, err = c.driver.Lstat(fp)
if err != nil {
return nil, err
}
}
base, err := newBaseResource(p, fi)
if err != nil {
return nil, err
}
base.xattrs, err = c.resolveXAttrs(fp, fi, base)
if err == ErrNotSupported {
log.Printf("resolving xattrs on %s not supported", fp)
} else if err != nil {
return nil, err
}
// TODO(stevvooe): Handle windows alternate data streams.
if fi.Mode().IsRegular() {
dgst, err := c.digest(p)
if err != nil {
return nil, err
}
return newRegularFile(*base, base.paths, fi.Size(), dgst)
}
if fi.Mode().IsDir() {
return newDirectory(*base)
}
if fi.Mode()&os.ModeSymlink != 0 {
// We handle relative links vs absolute links by including a
// beginning slash for absolute links. Effectively, the bundle's
// root is treated as the absolute link anchor.
target, err := c.driver.Readlink(fp)
if err != nil {
return nil, err
}
return newSymLink(*base, target)
}
if fi.Mode()&os.ModeNamedPipe != 0 {
return newNamedPipe(*base, base.paths)
}
if fi.Mode()&os.ModeDevice != 0 {
deviceDriver, ok := c.driver.(driverpkg.DeviceInfoDriver)
if !ok {
log.Printf("device extraction not supported %s", fp)
return nil, ErrNotSupported
}
// character and block devices merely need to recover the
// major/minor device number.
major, minor, err := deviceDriver.DeviceInfo(fi)
if err != nil {
return nil, err
}
return newDevice(*base, base.paths, major, minor)
}
log.Printf("%q (%v) is not supported", fp, fi.Mode())
return nil, ErrNotFound
}
func (c *context) verifyMetadata(resource, target Resource) error {
if target.Mode() != resource.Mode() {
return fmt.Errorf("resource %q has incorrect mode: %v != %v", target.Path(), target.Mode(), resource.Mode())
}
if target.UID() != resource.UID() {
return fmt.Errorf("unexpected uid for %q: %v != %v", target.Path(), target.UID(), resource.GID())
}
if target.GID() != resource.GID() {
return fmt.Errorf("unexpected gid for %q: %v != %v", target.Path(), target.GID(), target.GID())
}
if xattrer, ok := resource.(XAttrer); ok {
txattrer, tok := target.(XAttrer)
if !tok {
return fmt.Errorf("resource %q has xattrs but target does not support them", resource.Path())
}
// For xattrs, only ensure that we have those defined in the resource
// and their values match. We can ignore other xattrs. In other words,
// we only verify that target has the subset defined by resource.
txattrs := txattrer.XAttrs()
for attr, value := range xattrer.XAttrs() {
tvalue, ok := txattrs[attr]
if !ok {
return fmt.Errorf("resource %q target missing xattr %q", resource.Path(), attr)
}
if !bytes.Equal(value, tvalue) {
return fmt.Errorf("xattr %q value differs for resource %q", attr, resource.Path())
}
}
}
switch r := resource.(type) {
case RegularFile:
// TODO(stevvooe): Another reason to use a record-based approach. We
// have to do another type switch to get this to work. This could be
// fixed with an Equal function, but let's study this a little more to
// be sure.
t, ok := target.(RegularFile)
if !ok {
return fmt.Errorf("resource %q target not a regular file", r.Path())
}
if t.Size() != r.Size() {
return fmt.Errorf("resource %q target has incorrect size: %v != %v", t.Path(), t.Size(), r.Size())
}
case Directory:
t, ok := target.(Directory)
if !ok {
return fmt.Errorf("resource %q target not a directory", t.Path())
}
case SymLink:
t, ok := target.(SymLink)
if !ok {
return fmt.Errorf("resource %q target not a symlink", t.Path())
}
if t.Target() != r.Target() {
return fmt.Errorf("resource %q target has mismatched target: %q != %q", t.Path(), t.Target(), r.Target())
}
case Device:
t, ok := target.(Device)
if !ok {
return fmt.Errorf("resource %q is not a device", t.Path())
}
if t.Major() != r.Major() || t.Minor() != r.Minor() {
return fmt.Errorf("resource %q has mismatched major/minor numbers: %d,%d != %d,%d", t.Path(), t.Major(), t.Minor(), r.Major(), r.Minor())
}
case NamedPipe:
t, ok := target.(NamedPipe)
if !ok {
return fmt.Errorf("resource %q is not a named pipe", t.Path())
}
default:
return fmt.Errorf("cannot verify resource: %v", resource)
}
return nil
}
// Verify the resource in the context. An error will be returned a discrepancy
// is found.
func (c *context) Verify(resource Resource) error {
fp, err := c.fullpath(resource.Path())
if err != nil {
return err
}
fi, err := c.driver.Lstat(fp)
if err != nil {
return err
}
target, err := c.Resource(resource.Path(), fi)
if err != nil {
return err
}
if target.Path() != resource.Path() {
return fmt.Errorf("resource paths do not match: %q != %q", target.Path(), resource.Path())
}
if err := c.verifyMetadata(resource, target); err != nil {
return err
}
if h, isHardlinkable := resource.(Hardlinkable); isHardlinkable {
hardlinkKey, err := newHardlinkKey(fi)
if err == errNotAHardLink {
if len(h.Paths()) > 1 {
return fmt.Errorf("%q is not a hardlink to %q", h.Paths()[1], resource.Path())
}
} else if err != nil {
return err
}
for _, path := range h.Paths()[1:] {
fpLink, err := c.fullpath(path)
if err != nil {
return err
}
fiLink, err := c.driver.Lstat(fpLink)
if err != nil {
return err
}
targetLink, err := c.Resource(path, fiLink)
if err != nil {
return err
}
hardlinkKeyLink, err := newHardlinkKey(fiLink)
if err != nil {
return err
}
if hardlinkKeyLink != hardlinkKey {
return fmt.Errorf("%q is not a hardlink to %q", path, resource.Path())
}
if err := c.verifyMetadata(resource, targetLink); err != nil {
return err
}
}
}
switch r := resource.(type) {
case RegularFile:
t, ok := target.(RegularFile)
if !ok {
return fmt.Errorf("resource %q target not a regular file", r.Path())
}
// TODO(stevvooe): This may need to get a little more sophisticated
// for digest comparison. We may want to actually calculate the
// provided digests, rather than the implementations having an
// overlap.
if !digestsMatch(t.Digests(), r.Digests()) {
return fmt.Errorf("digests for resource %q do not match: %v != %v", t.Path(), t.Digests(), r.Digests())
}
}
return nil
}
func (c *context) checkoutFile(fp string, rf RegularFile) error {
if c.provider == nil {
return fmt.Errorf("no file provider")
}
var (
r io.ReadCloser
err error
)
for _, dgst := range rf.Digests() {
r, err = c.provider.Reader(dgst)
if err == nil {
break
}
}
if err != nil {
return fmt.Errorf("file content could not be provided: %v", err)
}
defer r.Close()
return atomicWriteFile(fp, r, rf)
}
// Apply the resource to the contexts. An error will be returned if the
// operation fails. Depending on the resource type, the resource may be
// created. For resource that cannot be resolved, an error will be returned.
func (c *context) Apply(resource Resource) error {
fp, err := c.fullpath(resource.Path())
if err != nil {
return err
}
if !strings.HasPrefix(fp, c.root) {
return fmt.Errorf("resource %v escapes root", resource)
}
var chmod = true
fi, err := c.driver.Lstat(fp)
if err != nil {
if !os.IsNotExist(err) {
return err
}
}
switch r := resource.(type) {
case RegularFile:
if fi == nil {
if err := c.checkoutFile(fp, r); err != nil {
return fmt.Errorf("error checking out file %q: %v", resource.Path(), err)
}
chmod = false
} else {
if !fi.Mode().IsRegular() {
return fmt.Errorf("file %q should be a regular file, but is not", resource.Path())
}
if fi.Size() != r.Size() {
if err := c.checkoutFile(fp, r); err != nil {
return fmt.Errorf("error checking out file %q: %v", resource.Path(), err)
}
} else {
for _, dgst := range r.Digests() {
f, err := os.Open(fp)
if err != nil {
return fmt.Errorf("failure opening file for read %q: %v", resource.Path(), err)
}
compared, err := dgst.Algorithm().FromReader(f)
if err == nil && dgst != compared {
if err := c.checkoutFile(fp, r); err != nil {
return fmt.Errorf("error checking out file %q: %v", resource.Path(), err)
}
break
}
if err1 := f.Close(); err == nil {
err = err1
}
if err != nil {
return fmt.Errorf("error checking digest for %q: %v", resource.Path(), err)
}
}
}
}
case Directory:
if fi == nil {
if err := c.driver.Mkdir(fp, resource.Mode()); err != nil {
return err
}
} else if !fi.Mode().IsDir() {
return fmt.Errorf("%q should be a directory, but is not", resource.Path())
}
case SymLink:
var target string // only possibly set if target resource is a symlink
if fi != nil {
if fi.Mode()&os.ModeSymlink != 0 {
target, err = c.driver.Readlink(fp)
if err != nil {
return err
}
}
}
if target != r.Target() {
if fi != nil {
if err := c.driver.Remove(fp); err != nil { // RemoveAll in case of directory?
return err
}
}
if err := c.driver.Symlink(r.Target(), fp); err != nil {
return err
}
}
// NOTE(stevvooe): Chmod on symlink is not supported on linux. We
// may want to maintain support for other platforms that have it.
chmod = false
case Device:
if fi == nil {
if err := c.driver.Mknod(fp, resource.Mode(), int(r.Major()), int(r.Minor())); err != nil {
return err
}
} else if (fi.Mode() & os.ModeDevice) == 0 {
return fmt.Errorf("%q should be a device, but is not", resource.Path())
} else {
major, minor, err := devices.DeviceInfo(fi)
if err != nil {
return err
}
if major != r.Major() || minor != r.Minor() {
if err := c.driver.Remove(fp); err != nil {
return err
}
if err := c.driver.Mknod(fp, resource.Mode(), int(r.Major()), int(r.Minor())); err != nil {
return err
}
}
}
case NamedPipe:
if fi == nil {
if err := c.driver.Mkfifo(fp, resource.Mode()); err != nil {
return err
}
} else if (fi.Mode() & os.ModeNamedPipe) == 0 {
return fmt.Errorf("%q should be a named pipe, but is not", resource.Path())
}
}
if h, isHardlinkable := resource.(Hardlinkable); isHardlinkable {
for _, path := range h.Paths() {
if path == resource.Path() {
continue
}
lp, err := c.fullpath(path)
if err != nil {
return err
}
if _, fi := c.driver.Lstat(lp); fi == nil {
c.driver.Remove(lp)
}
if err := c.driver.Link(fp, lp); err != nil {
return err
}
}
}
// Update filemode if file was not created
if chmod {
if err := c.driver.Lchmod(fp, resource.Mode()); err != nil {
return err
}
}
if err := c.driver.Lchown(fp, resource.UID(), resource.GID()); err != nil {
return err
}
if xattrer, ok := resource.(XAttrer); ok {
// For xattrs, only ensure that we have those defined in the resource
// and their values are set. We can ignore other xattrs. In other words,
// we only set xattres defined by resource but never remove.
if _, ok := resource.(SymLink); ok {
lxattrDriver, ok := c.driver.(driverpkg.LXAttrDriver)
if !ok {
return fmt.Errorf("unsupported symlink xattr for resource %q", resource.Path())
}
if err := lxattrDriver.LSetxattr(fp, xattrer.XAttrs()); err != nil {
return err
}
} else {
xattrDriver, ok := c.driver.(driverpkg.XAttrDriver)
if !ok {
return fmt.Errorf("unsupported xattr for resource %q", resource.Path())
}
if err := xattrDriver.Setxattr(fp, xattrer.XAttrs()); err != nil {
return err
}
}
}
return nil
}
// Walk provides a convenience function to call filepath.Walk correctly for
// the context. Otherwise identical to filepath.Walk, the path argument is
// corrected to be contained within the context.
func (c *context) Walk(fn filepath.WalkFunc) error {
return c.pathDriver.Walk(c.root, func(p string, fi os.FileInfo, err error) error {
contained, err := c.contain(p)
return fn(contained, fi, err)
})
}
// fullpath returns the system path for the resource, joined with the context
// root. The path p must be a part of the context.
func (c *context) fullpath(p string) (string, error) {
p = c.pathDriver.Join(c.root, p)
if !strings.HasPrefix(p, c.root) {
return "", fmt.Errorf("invalid context path")
}
return p, nil
}
// contain cleans and santizes the filesystem path p to be an absolute path,
// effectively relative to the context root.
func (c *context) contain(p string) (string, error) {
sanitized, err := c.pathDriver.Rel(c.root, p)
if err != nil {
return "", err
}
// ZOMBIES(stevvooe): In certain cases, we may want to remap these to a
// "containment error", so the caller can decide what to do.
return c.pathDriver.Join("/", c.pathDriver.Clean(sanitized)), nil
}
// digest returns the digest of the file at path p, relative to the root.
func (c *context) digest(p string) (digest.Digest, error) {
f, err := c.driver.Open(c.pathDriver.Join(c.root, p))
if err != nil {
return "", err
}
defer f.Close()
return c.digester.Digest(f)
}
// resolveXAttrs attempts to resolve the extended attributes for the resource
// at the path fp, which is the full path to the resource. If the resource
// cannot have xattrs, nil will be returned.
func (c *context) resolveXAttrs(fp string, fi os.FileInfo, base *resource) (map[string][]byte, error) {
if fi.Mode().IsRegular() || fi.Mode().IsDir() {
xattrDriver, ok := c.driver.(driverpkg.XAttrDriver)
if !ok {
log.Println("xattr extraction not supported")
return nil, ErrNotSupported
}
return xattrDriver.Getxattr(fp)
}
if fi.Mode()&os.ModeSymlink != 0 {
lxattrDriver, ok := c.driver.(driverpkg.LXAttrDriver)
if !ok {
log.Println("xattr extraction for symlinks not supported")
return nil, ErrNotSupported
}
return lxattrDriver.LGetxattr(fp)
}
return nil, nil
}

306
vendor/github.com/containerd/continuity/continuityfs/fuse.go generated vendored Normal file
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// +build linux darwin freebsd
package continuityfs
import (
"errors"
"fmt"
"io"
"os"
"path/filepath"
"syscall"
"bazil.org/fuse"
"bazil.org/fuse/fs"
"github.com/containerd/continuity"
"github.com/opencontainers/go-digest"
"github.com/sirupsen/logrus"
"golang.org/x/net/context"
)
// File represents any file type (non directory) in the filesystem
type File struct {
inode uint64
uid uint32
gid uint32
provider FileContentProvider
resource continuity.Resource
}
// NewFile creates a new file with the given inode and content provider
func NewFile(inode uint64, provider FileContentProvider) *File {
return &File{
inode: inode,
provider: provider,
}
}
func (f *File) setResource(r continuity.Resource) (err error) {
// TODO: error out if uid excesses uint32?
f.uid = uint32(r.UID())
f.gid = uint32(r.GID())
f.resource = r
return
}
// Attr sets the fuse attribute for the file
func (f *File) Attr(ctx context.Context, attr *fuse.Attr) (err error) {
// Set attributes from resource metadata
attr.Mode = f.resource.Mode()
attr.Uid = f.uid
attr.Gid = f.gid
if rf, ok := f.resource.(continuity.RegularFile); ok {
attr.Nlink = uint32(len(rf.Paths()))
attr.Size = uint64(rf.Size())
} else {
attr.Nlink = 1
}
attr.Inode = f.inode
return nil
}
// Open opens the file for read
// currently only regular files can be opened
func (f *File) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fs.Handle, error) {
var dgst digest.Digest
if rf, ok := f.resource.(continuity.RegularFile); ok {
digests := rf.Digests()
if len(digests) > 0 {
dgst = digests[0]
}
}
// TODO(dmcgowan): else check if device can be opened for read
r, err := f.provider.Open(f.resource.Path(), dgst)
if err != nil {
logrus.Debugf("Error opening handle: %v", err)
return nil, err
}
return &fileHandler{
reader: r,
}, nil
}
func (f *File) getDirent(name string) (fuse.Dirent, error) {
var t fuse.DirentType
switch f.resource.(type) {
case continuity.RegularFile:
t = fuse.DT_File
case continuity.SymLink:
t = fuse.DT_Link
case continuity.Device:
t = fuse.DT_Block
case continuity.NamedPipe:
t = fuse.DT_FIFO
default:
t = fuse.DT_Unknown
}
return fuse.Dirent{
Inode: f.inode,
Type: t,
Name: name,
}, nil
}
type fileHandler struct {
offset int64
reader io.ReadCloser
}
func (h *fileHandler) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadResponse) error {
if h.offset != req.Offset {
if seeker, ok := h.reader.(io.Seeker); ok {
if _, err := seeker.Seek(req.Offset, os.SEEK_SET); err != nil {
logrus.Debugf("Error seeking: %v", err)
return err
}
h.offset = req.Offset
} else {
return errors.New("unable to seek to offset")
}
}
n, err := h.reader.Read(resp.Data[:req.Size])
if err != nil {
logrus.Debugf("Read error: %v", err)
return err
}
h.offset = h.offset + int64(n)
resp.Data = resp.Data[:n]
return nil
}
func (h *fileHandler) Release(ctx context.Context, req *fuse.ReleaseRequest) error {
return h.reader.Close()
}
// Dir represents a file system directory
type Dir struct {
inode uint64
uid uint32
gid uint32
nodes map[string]fs.Node
provider FileContentProvider
resource continuity.Resource
}
// Attr sets the fuse attributes for the directory
func (d *Dir) Attr(ctx context.Context, attr *fuse.Attr) (err error) {
if d.resource == nil {
attr.Mode = os.ModeDir | 0555
} else {
attr.Mode = d.resource.Mode()
}
attr.Uid = d.uid
attr.Gid = d.gid
attr.Inode = d.inode
return nil
}
func (d *Dir) getDirent(name string) (fuse.Dirent, error) {
return fuse.Dirent{
Inode: d.inode,
Type: fuse.DT_Dir,
Name: name,
}, nil
}
type direnter interface {
getDirent(name string) (fuse.Dirent, error)
}
// Lookup looks up the filesystem node for the name within the directory
func (d *Dir) Lookup(ctx context.Context, name string) (fs.Node, error) {
node, ok := d.nodes[name]
if !ok {
return nil, fuse.ENOENT
}
return node, nil
}
// ReadDirAll reads all the directory entries
func (d *Dir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
ents := make([]fuse.Dirent, 0, len(d.nodes))
for name, node := range d.nodes {
if nd, ok := node.(direnter); ok {
de, err := nd.getDirent(name)
if err != nil {
return nil, err
}
ents = append(ents, de)
} else {
logrus.Errorf("%s does not have a directory entry", name)
}
}
return ents, nil
}
func (d *Dir) setResource(r continuity.Resource) (err error) {
d.uid = uint32(r.UID())
d.gid = uint32(r.GID())
d.resource = r
return
}
// NewDir creates a new directory object
func NewDir(inode uint64, provider FileContentProvider) *Dir {
return &Dir{
inode: inode,
nodes: map[string]fs.Node{},
provider: provider,
}
}
var (
rootPath = fmt.Sprintf("%c", filepath.Separator)
)
func addNode(path string, node fs.Node, cache map[string]*Dir, provider FileContentProvider) {
dirPath, file := filepath.Split(path)
d, ok := cache[dirPath]
if !ok {
d = NewDir(0, provider)
cache[dirPath] = d
addNode(filepath.Clean(dirPath), d, cache, provider)
}
d.nodes[file] = node
logrus.Debugf("%s (%#v) added to %s", file, node, dirPath)
}
type treeRoot struct {
root *Dir
}
func (t treeRoot) Root() (fs.Node, error) {
logrus.Debugf("Returning root with %#v", t.root.nodes)
return t.root, nil
}
// NewFSFromManifest creates a fuse filesystem using the given manifest
// to create the node tree and the content provider to serve up
// content for regular files.
func NewFSFromManifest(manifest *continuity.Manifest, mountRoot string, provider FileContentProvider) (fs.FS, error) {
tree := treeRoot{
root: NewDir(0, provider),
}
fi, err := os.Stat(mountRoot)
if err != nil {
return nil, err
}
st, ok := fi.Sys().(*syscall.Stat_t)
if !ok {
return nil, errors.New("could not access directory")
}
tree.root.uid = st.Uid
tree.root.gid = st.Gid
dirCache := map[string]*Dir{
rootPath: tree.root,
}
for i, resource := range manifest.Resources {
inode := uint64(i) + 1
if _, ok := resource.(continuity.Directory); ok {
cleanPath := filepath.Clean(resource.Path())
keyPath := fmt.Sprintf("%s%c", cleanPath, filepath.Separator)
d, ok := dirCache[keyPath]
if !ok {
d = NewDir(inode, provider)
dirCache[keyPath] = d
addNode(cleanPath, d, dirCache, provider)
} else {
d.inode = inode
}
if err := d.setResource(resource); err != nil {
return nil, err
}
continue
}
f := NewFile(inode, provider)
if err := f.setResource(resource); err != nil {
return nil, err
}
if rf, ok := resource.(continuity.RegularFile); ok {
for _, p := range rf.Paths() {
addNode(p, f, dirCache, provider)
}
} else {
addNode(resource.Path(), f, dirCache, provider)
}
}
return tree, nil
}

43
vendor/github.com/containerd/continuity/continuityfs/provider.go generated vendored Normal file
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// +build linux darwin freebsd
package continuityfs
import (
"io"
"path/filepath"
"github.com/containerd/continuity/driver"
"github.com/opencontainers/go-digest"
)
// FileContentProvider is an object which is used to fetch
// data and inode information about a path or digest.
// TODO(dmcgowan): Update GetContentPath to provide a
// filehandle or ReadWriteCloser.
type FileContentProvider interface {
Path(string, digest.Digest) (string, error)
Open(string, digest.Digest) (io.ReadCloser, error)
}
type fsContentProvider struct {
root string
driver driver.Driver
}
// NewFSFileContentProvider creates a new content provider which
// gets content from a directory on an existing filesystem based
// on the resource path.
func NewFSFileContentProvider(root string, driver driver.Driver) FileContentProvider {
return &fsContentProvider{
root: root,
driver: driver,
}
}
func (p *fsContentProvider) Path(path string, dgst digest.Digest) (string, error) {
return filepath.Join(p.root, path), nil
}
func (p *fsContentProvider) Open(path string, dgst digest.Digest) (io.ReadCloser, error) {
return p.driver.Open(filepath.Join(p.root, path))
}

5
vendor/github.com/containerd/continuity/devices/devices.go generated vendored Normal file
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package devices
import "fmt"
var ErrNotSupported = fmt.Errorf("not supported")

58
vendor/github.com/containerd/continuity/devices/devices_unix.go generated vendored Normal file
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// +build linux darwin freebsd solaris
package devices
import (
"fmt"
"os"
"syscall"
"golang.org/x/sys/unix"
)
func DeviceInfo(fi os.FileInfo) (uint64, uint64, error) {
sys, ok := fi.Sys().(*syscall.Stat_t)
if !ok {
return 0, 0, fmt.Errorf("cannot extract device from os.FileInfo")
}
dev := uint64(sys.Rdev)
return uint64(unix.Major(dev)), uint64(unix.Minor(dev)), nil
}
// mknod provides a shortcut for syscall.Mknod
func Mknod(p string, mode os.FileMode, maj, min int) error {
var (
m = syscallMode(mode.Perm())
dev uint64
)
if mode&os.ModeDevice != 0 {
dev = unix.Mkdev(uint32(maj), uint32(min))
if mode&os.ModeCharDevice != 0 {
m |= unix.S_IFCHR
} else {
m |= unix.S_IFBLK
}
} else if mode&os.ModeNamedPipe != 0 {
m |= unix.S_IFIFO
}
return unix.Mknod(p, m, int(dev))
}
// syscallMode returns the syscall-specific mode bits from Go's portable mode bits.
func syscallMode(i os.FileMode) (o uint32) {
o |= uint32(i.Perm())
if i&os.ModeSetuid != 0 {
o |= unix.S_ISUID
}
if i&os.ModeSetgid != 0 {
o |= unix.S_ISGID
}
if i&os.ModeSticky != 0 {
o |= unix.S_ISVTX
}
return
}

11
vendor/github.com/containerd/continuity/devices/devices_windows.go generated vendored Normal file
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package devices
import (
"os"
"github.com/pkg/errors"
)
func DeviceInfo(fi os.FileInfo) (uint64, uint64, error) {
return 0, 0, errors.Wrap(ErrNotSupported, "cannot get device info on windows")
}

88
vendor/github.com/containerd/continuity/digests.go generated vendored Normal file
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package continuity
import (
"fmt"
"io"
"sort"
"github.com/opencontainers/go-digest"
)
// Digester produces a digest for a given read stream
type Digester interface {
Digest(io.Reader) (digest.Digest, error)
}
// ContentProvider produces a read stream for a given digest
type ContentProvider interface {
Reader(digest.Digest) (io.ReadCloser, error)
}
type simpleDigester struct {
algorithm digest.Algorithm
}
func (sd simpleDigester) Digest(r io.Reader) (digest.Digest, error) {
digester := sd.algorithm.Digester()
if _, err := io.Copy(digester.Hash(), r); err != nil {
return "", err
}
return digester.Digest(), nil
}
// uniqifyDigests sorts and uniqifies the provided digest, ensuring that the
// digests are not repeated and no two digests with the same algorithm have
// different values. Because a stable sort is used, this has the effect of
// "zipping" digest collections from multiple resources.
func uniqifyDigests(digests ...digest.Digest) ([]digest.Digest, error) {
sort.Stable(digestSlice(digests)) // stable sort is important for the behavior here.
seen := map[digest.Digest]struct{}{}
algs := map[digest.Algorithm][]digest.Digest{} // detect different digests.
var out []digest.Digest
// uniqify the digests
for _, d := range digests {
if _, ok := seen[d]; ok {
continue
}
seen[d] = struct{}{}
algs[d.Algorithm()] = append(algs[d.Algorithm()], d)
if len(algs[d.Algorithm()]) > 1 {
return nil, fmt.Errorf("conflicting digests for %v found", d.Algorithm())
}
out = append(out, d)
}
return out, nil
}
// digestsMatch compares the two sets of digests to see if they match.
func digestsMatch(as, bs []digest.Digest) bool {
all := append(as, bs...)
uniqified, err := uniqifyDigests(all...)
if err != nil {
// the only error uniqifyDigests returns is when the digests disagree.
return false
}
disjoint := len(as) + len(bs)
if len(uniqified) == disjoint {
// if these two sets have the same cardinality, we know both sides
// didn't share any digests.
return false
}
return true
}
type digestSlice []digest.Digest
func (p digestSlice) Len() int { return len(p) }
func (p digestSlice) Less(i, j int) bool { return p[i] < p[j] }
func (p digestSlice) Swap(i, j int) { p[i], p[j] = p[j], p[i] }

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vendor/github.com/containerd/continuity/digests_test.go generated vendored Normal file
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package continuity
import (
"fmt"
"reflect"
"testing"
"github.com/opencontainers/go-digest"
)
// TestUniqifyDigests ensures that we deterministically sort digest entries
// for a resource.
func TestUniqifyDigests(t *testing.T) {
for _, testcase := range []struct {
description string
input [][]digest.Digest // input is a series of digest collections from separate resources.
expected []digest.Digest
err error
}{
{
description: "simple merge",
input: [][]digest.Digest{
{"sha1:abc", "sha256:def"},
{"sha1:abc", "sha256:def"},
},
expected: []digest.Digest{"sha1:abc", "sha256:def"},
},
{
description: "simple reversed order",
input: [][]digest.Digest{
{"sha1:abc", "sha256:def"},
{"sha256:def", "sha1:abc"},
},
expected: []digest.Digest{"sha1:abc", "sha256:def"},
},
{
description: "conflicting values for sha1",
input: [][]digest.Digest{
{"sha1:abc", "sha256:def"},
{"sha256:def", "sha1:def"},
},
err: fmt.Errorf("conflicting digests for sha1 found"),
},
} {
fatalf := func(format string, args ...interface{}) {
t.Fatalf(testcase.description+": "+format, args...)
}
var assembled []digest.Digest
for _, ds := range testcase.input {
assembled = append(assembled, ds...)
}
merged, err := uniqifyDigests(assembled...)
if err != testcase.err {
if testcase.err == nil {
fatalf("unexpected error uniqifying digests: %v", err)
}
if err != testcase.err && err.Error() != testcase.err.Error() {
// compare by string till we create nice error type
fatalf("unexpected error uniqifying digests: %v != %v", err, testcase.err)
}
}
if !reflect.DeepEqual(merged, testcase.expected) {
fatalf("unexpected uniquification: %v != %v", merged, testcase.expected)
}
}
}

162
vendor/github.com/containerd/continuity/driver/driver.go generated vendored Normal file
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package driver
import (
"fmt"
"io"
"os"
)
var ErrNotSupported = fmt.Errorf("not supported")
// Driver provides all of the system-level functions in a common interface.
// The context should call these with full paths and should never use the `os`
// package or any other package to access resources on the filesystem. This
// mechanism let's us carefully control access to the context and maintain
// path and resource integrity. It also gives us an interface to reason about
// direct resource access.
//
// Implementations don't need to do much other than meet the interface. For
// example, it is not required to wrap os.FileInfo to return correct paths for
// the call to Name().
type Driver interface {
// Note that Open() returns a File interface instead of *os.File. This
// is because os.File is a struct, so if Open was to return *os.File,
// the only way to fulfill the interface would be to call os.Open()
Open(path string) (File, error)
OpenFile(path string, flag int, perm os.FileMode) (File, error)
Stat(path string) (os.FileInfo, error)
Lstat(path string) (os.FileInfo, error)
Readlink(p string) (string, error)
Mkdir(path string, mode os.FileMode) error
Remove(path string) error
Link(oldname, newname string) error
Lchmod(path string, mode os.FileMode) error
Lchown(path string, uid, gid int64) error
Symlink(oldname, newname string) error
MkdirAll(path string, perm os.FileMode) error
RemoveAll(path string) error
// TODO(aaronl): These methods might move outside the main Driver
// interface in the future as more platforms are added.
Mknod(path string, mode os.FileMode, major int, minor int) error
Mkfifo(path string, mode os.FileMode) error
}
// File is the interface for interacting with files returned by continuity's Open
// This is needed since os.File is a struct, instead of an interface, so it can't
// be used.
type File interface {
io.ReadWriteCloser
io.Seeker
Readdir(n int) ([]os.FileInfo, error)
}
func NewSystemDriver() (Driver, error) {
// TODO(stevvooe): Consider having this take a "hint" path argument, which
// would be the context root. The hint could be used to resolve required
// filesystem support when assembling the driver to use.
return &driver{}, nil
}
// XAttrDriver should be implemented on operation systems and filesystems that
// have xattr support for regular files and directories.
type XAttrDriver interface {
// Getxattr returns all of the extended attributes for the file at path.
// Typically, this takes a syscall call to Listxattr and Getxattr.
Getxattr(path string) (map[string][]byte, error)
// Setxattr sets all of the extended attributes on file at path, following
// any symbolic links, if necessary. All attributes on the target are
// replaced by the values from attr. If the operation fails to set any
// attribute, those already applied will not be rolled back.
Setxattr(path string, attr map[string][]byte) error
}
// LXAttrDriver should be implemented by drivers on operating systems and
// filesystems that support setting and getting extended attributes on
// symbolic links. If this is not implemented, extended attributes will be
// ignored on symbolic links.
type LXAttrDriver interface {
// LGetxattr returns all of the extended attributes for the file at path
// and does not follow symlinks. Typically, this takes a syscall call to
// Llistxattr and Lgetxattr.
LGetxattr(path string) (map[string][]byte, error)
// LSetxattr sets all of the extended attributes on file at path, without
// following symbolic links. All attributes on the target are replaced by
// the values from attr. If the operation fails to set any attribute,
// those already applied will not be rolled back.
LSetxattr(path string, attr map[string][]byte) error
}
type DeviceInfoDriver interface {
DeviceInfo(fi os.FileInfo) (maj uint64, min uint64, err error)
}
// driver is a simple default implementation that sends calls out to the "os"
// package. Extend the "driver" type in system-specific files to add support,
// such as xattrs, which can add support at compile time.
type driver struct{}
var _ File = &os.File{}
// LocalDriver is the exported Driver struct for convenience.
var LocalDriver Driver = &driver{}
func (d *driver) Open(p string) (File, error) {
return os.Open(p)
}
func (d *driver) OpenFile(path string, flag int, perm os.FileMode) (File, error) {
return os.OpenFile(path, flag, perm)
}
func (d *driver) Stat(p string) (os.FileInfo, error) {
return os.Stat(p)
}
func (d *driver) Lstat(p string) (os.FileInfo, error) {
return os.Lstat(p)
}
func (d *driver) Readlink(p string) (string, error) {
return os.Readlink(p)
}
func (d *driver) Mkdir(p string, mode os.FileMode) error {
return os.Mkdir(p, mode)
}
// Remove is used to unlink files and remove directories.
// This is following the golang os package api which
// combines the operations into a higher level Remove
// function. If explicit unlinking or directory removal
// to mirror system call is required, they should be
// split up at that time.
func (d *driver) Remove(path string) error {
return os.Remove(path)
}
func (d *driver) Link(oldname, newname string) error {
return os.Link(oldname, newname)
}
func (d *driver) Lchown(name string, uid, gid int64) error {
// TODO: error out if uid excesses int bit width?
return os.Lchown(name, int(uid), int(gid))
}
func (d *driver) Symlink(oldname, newname string) error {
return os.Symlink(oldname, newname)
}
func (d *driver) MkdirAll(path string, perm os.FileMode) error {
return os.MkdirAll(path, perm)
}
func (d *driver) RemoveAll(path string) error {
return os.RemoveAll(path)
}

122
vendor/github.com/containerd/continuity/driver/driver_unix.go generated vendored Normal file
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// +build linux darwin freebsd solaris
package driver
import (
"errors"
"fmt"
"os"
"path/filepath"
"sort"
"github.com/containerd/continuity/devices"
"github.com/containerd/continuity/sysx"
)
func (d *driver) Mknod(path string, mode os.FileMode, major, minor int) error {
return devices.Mknod(path, mode, major, minor)
}
func (d *driver) Mkfifo(path string, mode os.FileMode) error {
if mode&os.ModeNamedPipe == 0 {
return errors.New("mode passed to Mkfifo does not have the named pipe bit set")
}
// mknod with a mode that has ModeNamedPipe set creates a fifo, not a
// device.
return devices.Mknod(path, mode, 0, 0)
}
// Lchmod changes the mode of an file not following symlinks.
func (d *driver) Lchmod(path string, mode os.FileMode) (err error) {
if !filepath.IsAbs(path) {
path, err = filepath.Abs(path)
if err != nil {
return
}
}
return sysx.Fchmodat(0, path, uint32(mode), sysx.AtSymlinkNofollow)
}
// Getxattr returns all of the extended attributes for the file at path p.
func (d *driver) Getxattr(p string) (map[string][]byte, error) {
xattrs, err := sysx.Listxattr(p)
if err != nil {
return nil, fmt.Errorf("listing %s xattrs: %v", p, err)
}
sort.Strings(xattrs)
m := make(map[string][]byte, len(xattrs))
for _, attr := range xattrs {
value, err := sysx.Getxattr(p, attr)
if err != nil {
return nil, fmt.Errorf("getting %q xattr on %s: %v", attr, p, err)
}
// NOTE(stevvooe): This append/copy tricky relies on unique
// xattrs. Break this out into an alloc/copy if xattrs are no
// longer unique.
m[attr] = append(m[attr], value...)
}
return m, nil
}
// Setxattr sets all of the extended attributes on file at path, following
// any symbolic links, if necessary. All attributes on the target are
// replaced by the values from attr. If the operation fails to set any
// attribute, those already applied will not be rolled back.
func (d *driver) Setxattr(path string, attrMap map[string][]byte) error {
for attr, value := range attrMap {
if err := sysx.Setxattr(path, attr, value, 0); err != nil {
return fmt.Errorf("error setting xattr %q on %s: %v", attr, path, err)
}
}
return nil
}
// LGetxattr returns all of the extended attributes for the file at path p
// not following symbolic links.
func (d *driver) LGetxattr(p string) (map[string][]byte, error) {
xattrs, err := sysx.LListxattr(p)
if err != nil {
return nil, fmt.Errorf("listing %s xattrs: %v", p, err)
}
sort.Strings(xattrs)
m := make(map[string][]byte, len(xattrs))
for _, attr := range xattrs {
value, err := sysx.LGetxattr(p, attr)
if err != nil {
return nil, fmt.Errorf("getting %q xattr on %s: %v", attr, p, err)
}
// NOTE(stevvooe): This append/copy tricky relies on unique
// xattrs. Break this out into an alloc/copy if xattrs are no
// longer unique.
m[attr] = append(m[attr], value...)
}
return m, nil
}
// LSetxattr sets all of the extended attributes on file at path, not
// following any symbolic links. All attributes on the target are
// replaced by the values from attr. If the operation fails to set any
// attribute, those already applied will not be rolled back.
func (d *driver) LSetxattr(path string, attrMap map[string][]byte) error {
for attr, value := range attrMap {
if err := sysx.LSetxattr(path, attr, value, 0); err != nil {
return fmt.Errorf("error setting xattr %q on %s: %v", attr, path, err)
}
}
return nil
}
func (d *driver) DeviceInfo(fi os.FileInfo) (maj uint64, min uint64, err error) {
return devices.DeviceInfo(fi)
}

21
vendor/github.com/containerd/continuity/driver/driver_windows.go generated vendored Normal file
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@ -0,0 +1,21 @@
package driver
import (
"os"
"github.com/pkg/errors"
)
func (d *driver) Mknod(path string, mode os.FileMode, major, minor int) error {
return errors.Wrap(ErrNotSupported, "cannot create device node on Windows")
}
func (d *driver) Mkfifo(path string, mode os.FileMode) error {
return errors.Wrap(ErrNotSupported, "cannot create fifo on Windows")
}
// Lchmod changes the mode of an file not following symlinks.
func (d *driver) Lchmod(path string, mode os.FileMode) (err error) {
// TODO: Use Window's equivalent
return os.Chmod(path, mode)
}

74
vendor/github.com/containerd/continuity/driver/utils.go generated vendored Normal file
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@ -0,0 +1,74 @@
package driver
import (
"io"
"io/ioutil"
"os"
"sort"
)
// ReadFile works the same as ioutil.ReadFile with the Driver abstraction
func ReadFile(r Driver, filename string) ([]byte, error) {
f, err := r.Open(filename)
if err != nil {
return nil, err
}
defer f.Close()
data, err := ioutil.ReadAll(f)
if err != nil {
return nil, err
}
return data, nil
}
// WriteFile works the same as ioutil.WriteFile with the Driver abstraction
func WriteFile(r Driver, filename string, data []byte, perm os.FileMode) error {
f, err := r.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
if err != nil {
return err
}
defer f.Close()
n, err := f.Write(data)
if err != nil {
return err
} else if n != len(data) {
return io.ErrShortWrite
}
return nil
}
// ReadDir works the same as ioutil.ReadDir with the Driver abstraction
func ReadDir(r Driver, dirname string) ([]os.FileInfo, error) {
f, err := r.Open(dirname)
if err != nil {
return nil, err
}
defer f.Close()
dirs, err := f.Readdir(-1)
if err != nil {
return nil, err
}
sort.Sort(fileInfos(dirs))
return dirs, nil
}
// Simple implementation of the sort.Interface for os.FileInfo
type fileInfos []os.FileInfo
func (fis fileInfos) Len() int {
return len(fis)
}
func (fis fileInfos) Less(i, j int) bool {
return fis[i].Name() < fis[j].Name()
}
func (fis fileInfos) Swap(i, j int) {
fis[i], fis[j] = fis[j], fis[i]
}

119
vendor/github.com/containerd/continuity/fs/copy.go generated vendored Normal file
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@ -0,0 +1,119 @@
package fs
import (
"io/ioutil"
"os"
"path/filepath"
"sync"
"github.com/pkg/errors"
)
var bufferPool = &sync.Pool{
New: func() interface{} {
buffer := make([]byte, 32*1024)
return &buffer
},
}
// CopyDir copies the directory from src to dst.
// Most efficient copy of files is attempted.
func CopyDir(dst, src string) error {
inodes := map[uint64]string{}
return copyDirectory(dst, src, inodes)
}
func copyDirectory(dst, src string, inodes map[uint64]string) error {
stat, err := os.Stat(src)
if err != nil {
return errors.Wrapf(err, "failed to stat %s", src)
}
if !stat.IsDir() {
return errors.Errorf("source is not directory")
}
if st, err := os.Stat(dst); err != nil {
if err := os.Mkdir(dst, stat.Mode()); err != nil {
return errors.Wrapf(err, "failed to mkdir %s", dst)
}
} else if !st.IsDir() {
return errors.Errorf("cannot copy to non-directory: %s", dst)
} else {
if err := os.Chmod(dst, stat.Mode()); err != nil {
return errors.Wrapf(err, "failed to chmod on %s", dst)
}
}
fis, err := ioutil.ReadDir(src)
if err != nil {
return errors.Wrapf(err, "failed to read %s", src)
}
if err := copyFileInfo(stat, dst); err != nil {
return errors.Wrapf(err, "failed to copy file info for %s", dst)
}
for _, fi := range fis {
source := filepath.Join(src, fi.Name())
target := filepath.Join(dst, fi.Name())
switch {
case fi.IsDir():
if err := copyDirectory(target, source, inodes); err != nil {
return err
}
continue
case (fi.Mode() & os.ModeType) == 0:
link, err := getLinkSource(target, fi, inodes)
if err != nil {
return errors.Wrap(err, "failed to get hardlink")
}
if link != "" {
if err := os.Link(link, target); err != nil {
return errors.Wrap(err, "failed to create hard link")
}
} else if err := copyFile(source, target); err != nil {
return errors.Wrap(err, "failed to copy files")
}
case (fi.Mode() & os.ModeSymlink) == os.ModeSymlink:
link, err := os.Readlink(source)
if err != nil {
return errors.Wrapf(err, "failed to read link: %s", source)
}
if err := os.Symlink(link, target); err != nil {
return errors.Wrapf(err, "failed to create symlink: %s", target)
}
case (fi.Mode() & os.ModeDevice) == os.ModeDevice:
if err := copyDevice(target, fi); err != nil {
return errors.Wrapf(err, "failed to create device")
}
default:
// TODO: Support pipes and sockets
return errors.Wrapf(err, "unsupported mode %s", fi.Mode())
}
if err := copyFileInfo(fi, target); err != nil {
return errors.Wrap(err, "failed to copy file info")
}
if err := copyXAttrs(target, source); err != nil {
return errors.Wrap(err, "failed to copy xattrs")
}
}
return nil
}
func copyFile(source, target string) error {
src, err := os.Open(source)
if err != nil {
return errors.Wrapf(err, "failed to open source %s", source)
}
defer src.Close()
tgt, err := os.Create(target)
if err != nil {
return errors.Wrapf(err, "failed to open target %s", target)
}
defer tgt.Close()
return copyFileContent(tgt, src)
}

95
vendor/github.com/containerd/continuity/fs/copy_linux.go generated vendored Normal file
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@ -0,0 +1,95 @@
package fs
import (
"io"
"os"
"syscall"
"github.com/containerd/continuity/sysx"
"github.com/pkg/errors"
"golang.org/x/sys/unix"
)
func copyFileInfo(fi os.FileInfo, name string) error {
st := fi.Sys().(*syscall.Stat_t)
if err := os.Lchown(name, int(st.Uid), int(st.Gid)); err != nil {
if os.IsPermission(err) {
// Normally if uid/gid are the same this would be a no-op, but some
// filesystems may still return EPERM... for instance NFS does this.
// In such a case, this is not an error.
if dstStat, err2 := os.Lstat(name); err2 == nil {
st2 := dstStat.Sys().(*syscall.Stat_t)
if st.Uid == st2.Uid && st.Gid == st2.Gid {
err = nil
}
}
}
if err != nil {
return errors.Wrapf(err, "failed to chown %s", name)
}
}
if (fi.Mode() & os.ModeSymlink) != os.ModeSymlink {
if err := os.Chmod(name, fi.Mode()); err != nil {
return errors.Wrapf(err, "failed to chmod %s", name)
}
}
timespec := []unix.Timespec{unix.Timespec(StatAtime(st)), unix.Timespec(StatMtime(st))}
if err := unix.UtimesNanoAt(unix.AT_FDCWD, name, timespec, unix.AT_SYMLINK_NOFOLLOW); err != nil {
return errors.Wrapf(err, "failed to utime %s", name)
}
return nil
}
func copyFileContent(dst, src *os.File) error {
st, err := src.Stat()
if err != nil {
return errors.Wrap(err, "unable to stat source")
}
n, err := unix.CopyFileRange(int(src.Fd()), nil, int(dst.Fd()), nil, int(st.Size()), 0)
if err != nil {
if err != unix.ENOSYS && err != unix.EXDEV {
return errors.Wrap(err, "copy file range failed")
}
buf := bufferPool.Get().(*[]byte)
_, err = io.CopyBuffer(dst, src, *buf)
bufferPool.Put(buf)
return err
}
if int64(n) != st.Size() {
return errors.Wrapf(err, "short copy: %d of %d", int64(n), st.Size())
}
return nil
}
func copyXAttrs(dst, src string) error {
xattrKeys, err := sysx.LListxattr(src)
if err != nil {
return errors.Wrapf(err, "failed to list xattrs on %s", src)
}
for _, xattr := range xattrKeys {
data, err := sysx.LGetxattr(src, xattr)
if err != nil {
return errors.Wrapf(err, "failed to get xattr %q on %s", xattr, src)
}
if err := sysx.LSetxattr(dst, xattr, data, 0); err != nil {
return errors.Wrapf(err, "failed to set xattr %q on %s", xattr, dst)
}
}
return nil
}
func copyDevice(dst string, fi os.FileInfo) error {
st, ok := fi.Sys().(*syscall.Stat_t)
if !ok {
return errors.New("unsupported stat type")
}
return unix.Mknod(dst, uint32(fi.Mode()), int(st.Rdev))
}

71
vendor/github.com/containerd/continuity/fs/copy_test.go generated vendored Normal file
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@ -0,0 +1,71 @@
package fs
import (
"io/ioutil"
"os"
"testing"
_ "crypto/sha256"
"github.com/containerd/continuity/fs/fstest"
"github.com/pkg/errors"
)
// TODO: Create copy directory which requires privilege
// chown
// mknod
// setxattr fstest.SetXAttr("/home", "trusted.overlay.opaque", "y"),
func TestCopyDirectory(t *testing.T) {
apply := fstest.Apply(
fstest.CreateDir("/etc/", 0755),
fstest.CreateFile("/etc/hosts", []byte("localhost 127.0.0.1"), 0644),
fstest.Link("/etc/hosts", "/etc/hosts.allow"),
fstest.CreateDir("/usr/local/lib", 0755),
fstest.CreateFile("/usr/local/lib/libnothing.so", []byte{0x00, 0x00}, 0755),
fstest.Symlink("libnothing.so", "/usr/local/lib/libnothing.so.2"),
fstest.CreateDir("/home", 0755),
)
if err := testCopy(apply); err != nil {
t.Fatalf("Copy test failed: %+v", err)
}
}
// This test used to fail because link-no-nothing.txt would be copied first,
// then file operations in dst during the CopyDir would follow the symlink and
// fail.
func TestCopyDirectoryWithLocalSymlink(t *testing.T) {
apply := fstest.Apply(
fstest.CreateFile("nothing.txt", []byte{0x00, 0x00}, 0755),
fstest.Symlink("nothing.txt", "link-no-nothing.txt"),
)
if err := testCopy(apply); err != nil {
t.Fatalf("Copy test failed: %+v", err)
}
}
func testCopy(apply fstest.Applier) error {
t1, err := ioutil.TempDir("", "test-copy-src-")
if err != nil {
return errors.Wrap(err, "failed to create temporary directory")
}
defer os.RemoveAll(t1)
t2, err := ioutil.TempDir("", "test-copy-dst-")
if err != nil {
return errors.Wrap(err, "failed to create temporary directory")
}
defer os.RemoveAll(t2)
if err := apply.Apply(t1); err != nil {
return errors.Wrap(err, "failed to apply changes")
}
if err := CopyDir(t2, t1); err != nil {
return errors.Wrap(err, "failed to copy")
}
return fstest.CheckDirectoryEqual(t1, t2)
}

80
vendor/github.com/containerd/continuity/fs/copy_unix.go generated vendored Normal file
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@ -0,0 +1,80 @@
// +build solaris darwin freebsd
package fs
import (
"io"
"os"
"syscall"
"github.com/containerd/continuity/sysx"
"github.com/pkg/errors"
"golang.org/x/sys/unix"
)
func copyFileInfo(fi os.FileInfo, name string) error {
st := fi.Sys().(*syscall.Stat_t)
if err := os.Lchown(name, int(st.Uid), int(st.Gid)); err != nil {
if os.IsPermission(err) {
// Normally if uid/gid are the same this would be a no-op, but some
// filesystems may still return EPERM... for instance NFS does this.
// In such a case, this is not an error.
if dstStat, err2 := os.Lstat(name); err2 == nil {
st2 := dstStat.Sys().(*syscall.Stat_t)
if st.Uid == st2.Uid && st.Gid == st2.Gid {
err = nil
}
}
}
if err != nil {
return errors.Wrapf(err, "failed to chown %s", name)
}
}
if (fi.Mode() & os.ModeSymlink) != os.ModeSymlink {
if err := os.Chmod(name, fi.Mode()); err != nil {
return errors.Wrapf(err, "failed to chmod %s", name)
}
}
timespec := []syscall.Timespec{StatAtime(st), StatMtime(st)}
if err := syscall.UtimesNano(name, timespec); err != nil {
return errors.Wrapf(err, "failed to utime %s", name)
}
return nil
}
func copyFileContent(dst, src *os.File) error {
buf := bufferPool.Get().(*[]byte)
_, err := io.CopyBuffer(dst, src, *buf)
bufferPool.Put(buf)
return err
}
func copyXAttrs(dst, src string) error {
xattrKeys, err := sysx.LListxattr(src)
if err != nil {
return errors.Wrapf(err, "failed to list xattrs on %s", src)
}
for _, xattr := range xattrKeys {
data, err := sysx.LGetxattr(src, xattr)
if err != nil {
return errors.Wrapf(err, "failed to get xattr %q on %s", xattr, src)
}
if err := sysx.LSetxattr(dst, xattr, data, 0); err != nil {
return errors.Wrapf(err, "failed to set xattr %q on %s", xattr, dst)
}
}
return nil
}
func copyDevice(dst string, fi os.FileInfo) error {
st, ok := fi.Sys().(*syscall.Stat_t)
if !ok {
return errors.New("unsupported stat type")
}
return unix.Mknod(dst, uint32(fi.Mode()), int(st.Rdev))
}

33
vendor/github.com/containerd/continuity/fs/copy_windows.go generated vendored Normal file
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@ -0,0 +1,33 @@
package fs
import (
"io"
"os"
"github.com/pkg/errors"
)
func copyFileInfo(fi os.FileInfo, name string) error {
if err := os.Chmod(name, fi.Mode()); err != nil {
return errors.Wrapf(err, "failed to chmod %s", name)
}
// TODO: copy windows specific metadata
return nil
}
func copyFileContent(dst, src *os.File) error {
buf := bufferPool.Get().(*[]byte)
_, err := io.CopyBuffer(dst, src, *buf)
bufferPool.Put(buf)
return err
}
func copyXAttrs(dst, src string) error {
return nil
}
func copyDevice(dst string, fi os.FileInfo) error {
return errors.New("device copy not supported")
}

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