Add console pkg and update go-runc

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

vendor.conf

@@ -1,5 +1,7 @@
 # go-runc client for runc; master as of 01/20/2017
-github.com/crosbymichael/go-runc f36917a18b3d962aee066063cba0bcff44e338ca
+github.com/crosbymichael/go-runc d300412371ca6865a40bd4559599bb370889e2aa
+# console pkg;
+github.com/crosbymichael/console 4bf9d88357031b516b3794a2594b6d060a29c59c
 # go-metrics client to prometheus; master as of 12/16/2016
 github.com/docker/go-metrics 0f35294225552d968a13f9c5bc71a3fa44b2eb87
 # prometheus client; latest release as of 12/16/2016

vendor/github.com/crosbymichael/console/LICENSE

@@ -0,0 +1,24 @@
+Copyright (c) 2017-infinity Michael Crosby. crosbymichael@gmail.com
+
+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.

vendor/github.com/crosbymichael/console/console.go

@@ -0,0 +1,54 @@
+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
+	// Reset restores the console to its orignal state
+	Reset() error
+	// Size returns the window size of the console
+	Size() (WinSize, error)
+}
+
+// WinSize specifies the window size of the console
+type WinSize struct {
+	// Width of the console
+	Width uint16
+	// Height of the console
+	Height uint16
+	x      uint16
+	y      uint16
+}
+
+// Current returns the current processes console
+func Current() Console {
+	return &master{
+		f: os.Stdin,
+	}
+}
+
+// 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 &master{
+		f: f,
+	}, nil
+}

vendor/github.com/crosbymichael/console/console_linux.go

@@ -0,0 +1,105 @@
+package console
+
+// #include <termios.h>
+import "C"
+
+import (
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+// 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", syscall.O_RDWR|syscall.O_NOCTTY|syscall.O_CLOEXEC, 0)
+	if err != nil {
+		return nil, "", err
+	}
+	if err := saneTerminal(f); err != nil {
+		return nil, "", err
+	}
+	slave, err := ptsname(f)
+	if err != nil {
+		return nil, "", err
+	}
+	if err := unlockpt(f); err != nil {
+		return nil, "", err
+	}
+	return &master{
+		f: f,
+	}, slave, nil
+}
+
+type master struct {
+	f       *os.File
+	termios *syscall.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 ioctl(
+		m.f.Fd(),
+		uintptr(syscall.TIOCSWINSZ),
+		uintptr(unsafe.Pointer(&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.termios == nil {
+		return nil
+	}
+	return tcset(m.f.Fd(), m.termios)
+}
+
+func (m *master) SetRaw() error {
+	m.termios = &syscall.Termios{}
+	if err := tcget(m.f.Fd(), m.termios); err != nil {
+		return err
+	}
+	rawState := *m.termios
+	C.cfmakeraw((*C.struct_termios)(unsafe.Pointer(&rawState)))
+	rawState.Oflag = rawState.Oflag | C.OPOST
+	return tcset(m.f.Fd(), &rawState)
+}
+
+func (m *master) Size() (WinSize, error) {
+	var ws WinSize
+	if err := ioctl(
+		m.f.Fd(),
+		uintptr(syscall.TIOCGWINSZ),
+		uintptr(unsafe.Pointer(&ws)),
+	); err != nil {
+		return ws, err
+	}
+	return ws, nil
+}
+
+// checkConsole checks if the provided file is a console
+func checkConsole(f *os.File) error {
+	var termios syscall.Termios
+	if tcget(f.Fd(), &termios) != nil {
+		return ErrNotAConsole
+	}
+	return nil
+}

vendor/github.com/crosbymichael/console/tc.go

@@ -0,0 +1,52 @@
+// +build linux
+
+package console
+
+import (
+	"fmt"
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+func tcget(fd uintptr, p *syscall.Termios) error {
+	return ioctl(fd, syscall.TCGETS, uintptr(unsafe.Pointer(p)))
+}
+
+func tcset(fd uintptr, p *syscall.Termios) error {
+	return ioctl(fd, syscall.TCSETS, uintptr(unsafe.Pointer(p)))
+}
+
+func ioctl(fd, flag, data uintptr) error {
+	if _, _, err := syscall.Syscall(syscall.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(), syscall.TIOCSPTLCK, uintptr(unsafe.Pointer(&u)))
+}
+
+// ptsname retrieves the name of the first available pts for the given master.
+func ptsname(f *os.File) (string, error) {
+	var n int32
+	if err := ioctl(f.Fd(), syscall.TIOCGPTN, uintptr(unsafe.Pointer(&n))); err != nil {
+		return "", err
+	}
+	return fmt.Sprintf("/dev/pts/%d", n), nil
+}
+
+func saneTerminal(f *os.File) error {
+	// Go doesn't have a wrapper for any of the termios ioctls.
+	var termios syscall.Termios
+	if err := tcget(f.Fd(), &termios); err != nil {
+		return err
+	}
+	// Set -onlcr so we don't have to deal with \r.
+	termios.Oflag &^= syscall.ONLCR
+	return tcset(f.Fd(), &termios)
+}

vendor/github.com/crosbymichael/go-runc/console.go

@@ -3,22 +3,26 @@ package runc
 import (
 	"fmt"
 	"net"
-	"os"
+	"path/filepath"
 
-	"github.com/docker/docker/pkg/term"
+	"github.com/crosbymichael/console"
 	"github.com/opencontainers/runc/libcontainer/utils"
 )
 
 // NewConsoleSocket creates a new unix socket at the provided path to accept a
 // pty master created by runc for use by the container
 func NewConsoleSocket(path string) (*ConsoleSocket, error) {
-	l, err := net.Listen("unix", path)
+	abs, err := filepath.Abs(path)
+	if err != nil {
+		return nil, err
+	}
+	l, err := net.Listen("unix", abs)
 	if err != nil {
 		return nil, err
 	}
 	return &ConsoleSocket{
 		l:    l,
-		path: path,
+		path: abs,
 	}, nil
 }
 
@@ -34,7 +38,7 @@ func (c *ConsoleSocket) Path() string {
 }
 
 // ReceiveMaster blocks until the socket receives the pty master
-func (c *ConsoleSocket) ReceiveMaster() (*Console, error) {
+func (c *ConsoleSocket) ReceiveMaster() (console.Console, error) {
 	conn, err := c.l.Accept()
 	if err != nil {
 		return nil, err
@@ -52,9 +56,7 @@ func (c *ConsoleSocket) ReceiveMaster() (*Console, error) {
 	if err != nil {
 		return nil, err
 	}
-	return &Console{
+	return console.ConsoleFromFile(f)
-		master: f,
-	}, nil
 }
 
 // Close closes the unix socket
@@ -69,31 +71,3 @@ type WinSize struct {
 	// Height of the console
 	Height uint16
 }
-
-// Console is a pty master
-type Console struct {
-	master *os.File
-}
-
-// Read from the console
-func (c *Console) Read(b []byte) (int, error) {
-	return c.master.Read(b)
-}
-
-// Write writes to the console
-func (c *Console) Write(b []byte) (int, error) {
-	return c.master.Write(b)
-}
-
-// Resize the console
-func (c *Console) Resize(ws WinSize) error {
-	return term.SetWinsize(c.master.Fd(), &term.Winsize{
-		Width:  ws.Width,
-		Height: ws.Height,
-	})
-}
-
-// Close the console
-func (c *Console) Close() error {
-	return c.master.Close()
-}

vendor/github.com/crosbymichael/go-runc/runc.go

@@ -8,6 +8,7 @@ import (
 	"io/ioutil"
 	"os"
 	"os/exec"
+	"path/filepath"
 	"strconv"
 	"syscall"
 	"time"
@@ -73,9 +74,13 @@ type CreateOpts struct {
 	NoNewKeyring  bool
 }
 
-func (o *CreateOpts) args() (out []string) {
+func (o *CreateOpts) args() (out []string, err error) {
 	if o.PidFile != "" {
-		out = append(out, "--pid-file", o.PidFile)
+		abs, err := filepath.Abs(o.PidFile)
+		if err != nil {
+			return nil, err
+		}
+		out = append(out, "--pid-file", abs)
 	}
 	if o.ConsoleSocket != nil {
 		out = append(out, "--console-socket", o.ConsoleSocket.Path())
@@ -89,17 +94,21 @@ func (o *CreateOpts) args() (out []string) {
 	if o.Detach {
 		out = append(out, "--detach")
 	}
-	return out
+	return out, nil
 }
 
 // Create creates a new container and returns its pid if it was created successfully
 func (r *Runc) Create(context context.Context, id, bundle string, opts *CreateOpts) error {
 	args := []string{"create", "--bundle", bundle}
 	if opts != nil {
-		args = append(args, opts.args()...)
+		oargs, err := opts.args()
+		if err != nil {
+			return err
+		}
+		args = append(args, oargs...)
 	}
 	cmd := r.command(context, append(args, id)...)
-	if opts != nil {
+	if opts != nil && opts.IO != nil {
 		opts.Set(cmd)
 	}
 	if cmd.Stdout == nil && cmd.Stderr == nil {
@@ -138,7 +147,7 @@ type ExecOpts struct {
 	Detach        bool
 }
 
-func (o *ExecOpts) args() (out []string) {
+func (o *ExecOpts) args() (out []string, err error) {
 	out = append(out, "--user", fmt.Sprintf("%d:%d", o.Uid, o.Gid))
 	if o.Tty {
 		out = append(out, "--tty")
@@ -153,9 +162,13 @@ func (o *ExecOpts) args() (out []string) {
 		out = append(out, "--detach")
 	}
 	if o.PidFile != "" {
-		out = append(out, "--pid-file", o.PidFile)
+		abs, err := filepath.Abs(o.PidFile)
+		if err != nil {
+			return nil, err
+		}
+		out = append(out, "--pid-file", abs)
 	}
-	return out
+	return out, nil
 }
 
 // Exec executres and additional process inside the container based on a full
@@ -173,7 +186,11 @@ func (r *Runc) Exec(context context.Context, id string, spec specs.Process, opts
 	}
 	args := []string{"exec", "--process", f.Name()}
 	if opts != nil {
-		args = append(args, opts.args()...)
+		oargs, err := opts.args()
+		if err != nil {
+			return err
+		}
+		args = append(args, oargs...)
 	}
 	cmd := r.command(context, append(args, id)...)
 	if opts != nil {
@@ -187,7 +204,11 @@ func (r *Runc) Exec(context context.Context, id string, spec specs.Process, opts
 func (r *Runc) Run(context context.Context, id, bundle string, opts *CreateOpts) (int, error) {
 	args := []string{"run", "--bundle", bundle}
 	if opts != nil {
-		args = append(args, opts.args()...)
+		oargs, err := opts.args()
+		if err != nil {
+			return -1, err
+		}
+		args = append(args, oargs...)
 	}
 	cmd := r.command(context, append(args, id)...)
 	if opts != nil {