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*: xattr can Update()

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This is a gnarly patchset that has been mashed together.
It uncovered that some aspects of Check were never really working
correctly for `xattr` keywords, but also the `Update()` had been left
undone for a while.

This includes some API changes around the `Keyword` and `KeyVal` types.

Also I would like to update the signature for the `UpdateKeywordFunc` to
just accept a `KeyVal` as an argugment, rather than a keyword AND the
value. with this context there would be no need to guess on the value of
what's passed to the xattr update function of whether it needs or
already is base64 encoded.

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
This commit is contained in:
Vincent Batts 2017-06-15 14:54:58 -04:00
parent fb4ec19981
commit ed464af779
Signed by: vbatts
GPG key ID: 10937E57733F1362
19 changed files with 398 additions and 258 deletions
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19
updatefuncs.go
View file

@ -6,12 +6,14 @@ import (
"strconv"
"strings"
"time"
"github.com/Sirupsen/logrus"
)
// UpdateKeywordFunc is the signature for a function that will restore a file's
// attributes. Where path is relative path to the file, and value to be
// restored to.
type UpdateKeywordFunc func(path string, value string) (os.FileInfo, error)
type UpdateKeywordFunc func(keyword Keyword, path string, value string) (os.FileInfo, error)
// UpdateKeywordFuncs is the registered list of functions to update file attributes.
// Keyed by the keyword as it would show up in the manifest
@ -21,9 +23,10 @@ var UpdateKeywordFuncs = map[Keyword]UpdateKeywordFunc{
"tar_time": tartimeUpdateKeywordFunc,
"uid": uidUpdateKeywordFunc,
"gid": gidUpdateKeywordFunc,
"xattr": xattrUpdateKeywordFunc,
}
func uidUpdateKeywordFunc(path, value string) (os.FileInfo, error) {
func uidUpdateKeywordFunc(keyword Keyword, path, value string) (os.FileInfo, error) {
uid, err := strconv.Atoi(value)
if err != nil {
return nil, err
@ -34,7 +37,7 @@ func uidUpdateKeywordFunc(path, value string) (os.FileInfo, error) {
return os.Lstat(path)
}
func gidUpdateKeywordFunc(path, value string) (os.FileInfo, error) {
func gidUpdateKeywordFunc(keyword Keyword, path, value string) (os.FileInfo, error) {
gid, err := strconv.Atoi(value)
if err != nil {
return nil, err
@ -45,12 +48,12 @@ func gidUpdateKeywordFunc(path, value string) (os.FileInfo, error) {
return os.Lstat(path)
}
func modeUpdateKeywordFunc(path, value string) (os.FileInfo, error) {
func modeUpdateKeywordFunc(keyword Keyword, path, value string) (os.FileInfo, error) {
vmode, err := strconv.ParseInt(value, 8, 32)
if err != nil {
return nil, err
}
Debugf("path: %q, value: %q, vmode: %o", path, value, vmode)
logrus.Debugf("path: %q, value: %q, vmode: %o", path, value, vmode)
if err := os.Chmod(path, os.FileMode(vmode)); err != nil {
return nil, err
}
@ -60,7 +63,7 @@ func modeUpdateKeywordFunc(path, value string) (os.FileInfo, error) {
// since tar_time will only be second level precision, then when restoring the
// filepath from a tar_time, then compare the seconds first and only Chtimes if
// the seconds value is different.
func tartimeUpdateKeywordFunc(path, value string) (os.FileInfo, error) {
func tartimeUpdateKeywordFunc(keyword Keyword, path, value string) (os.FileInfo, error) {
info, err := os.Lstat(path)
if err != nil {
return nil, err
@ -89,7 +92,7 @@ func tartimeUpdateKeywordFunc(path, value string) (os.FileInfo, error) {
}
// this is nano second precision
func timeUpdateKeywordFunc(path, value string) (os.FileInfo, error) {
func timeUpdateKeywordFunc(keyword Keyword, path, value string) (os.FileInfo, error) {
v := strings.SplitN(value, ".", 2)
if len(v) != 2 {
return nil, fmt.Errorf("expected a number like 1469104727.871937272")
@ -98,7 +101,7 @@ func timeUpdateKeywordFunc(path, value string) (os.FileInfo, error) {
if err != nil {
return nil, fmt.Errorf("expected nano seconds, but got %q", v[0]+v[1])
}
Debugf("arg: %q; nsec: %q", v[0]+v[1], nsec)
logrus.Debugf("arg: %q; nsec: %q", v[0]+v[1], nsec)
vtime := time.Unix(0, nsec)
if err := os.Chtimes(path, vtime, vtime); err != nil {