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Merge pull request #5084 from greatroar/utimesnano

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Simplify and refactor restoring of timestamps
This commit is contained in:
Michael Eischer 2024-10-19 12:47:13 +00:00 committed by GitHub
commit 5fe6607127
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GPG Key ID: B5690EEEBB952194
10 changed files with 57 additions and 80 deletions
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15
internal/fs/node.go
View File

@ -292,18 +292,11 @@ func nodeRestoreMetadata(node *restic.Node, path string, warn func(msg string))
}
func nodeRestoreTimestamps(node *restic.Node, path string) error {
var utimes = [...]syscall.Timespec{
syscall.NsecToTimespec(node.AccessTime.UnixNano()),
syscall.NsecToTimespec(node.ModTime.UnixNano()),
}
atime := node.AccessTime.UnixNano()
mtime := node.ModTime.UnixNano()
if node.Type == restic.NodeTypeSymlink {
return nodeRestoreSymlinkTimestamps(path, utimes)
if err := utimesNano(fixpath(path), atime, mtime, node.Type); err != nil {
return &os.PathError{Op: "UtimesNano", Path: path, Err: err}
}
if err := syscall.UtimesNano(fixpath(path), utimes[:]); err != nil {
return errors.Wrap(err, "UtimesNano")
}
return nil
}

10
internal/fs/node_aix.go
View File

@ -3,15 +3,7 @@
package fs
import (
"syscall"
"github.com/restic/restic/internal/restic"
)
func nodeRestoreSymlinkTimestamps(_ string, _ [2]syscall.Timespec) error {
return nil
}
import "github.com/restic/restic/internal/restic"
// nodeRestoreExtendedAttributes is a no-op on AIX.
func nodeRestoreExtendedAttributes(_ *restic.Node, _ string) error {

7
internal/fs/node_darwin.go
View File

@ -1,7 +0,0 @@
package fs
import "syscall"
func nodeRestoreSymlinkTimestamps(path string, utimes [2]syscall.Timespec) error {
return nil
}

30
internal/fs/node_linux.go
View File

@ -1,33 +1,15 @@
package fs
import (
"os"
"path/filepath"
"syscall"
"github.com/restic/restic/internal/restic"
"golang.org/x/sys/unix"
"github.com/restic/restic/internal/errors"
)
func nodeRestoreSymlinkTimestamps(path string, utimes [2]syscall.Timespec) error {
dir, err := os.Open(fixpath(filepath.Dir(path)))
if err != nil {
return errors.WithStack(err)
}
// utimesNano is like syscall.UtimesNano, except that it does not follow symlinks.
func utimesNano(path string, atime, mtime int64, _ restic.NodeType) error {
times := []unix.Timespec{
{Sec: utimes[0].Sec, Nsec: utimes[0].Nsec},
{Sec: utimes[1].Sec, Nsec: utimes[1].Nsec},
unix.NsecToTimespec(atime),
unix.NsecToTimespec(mtime),
}
err = unix.UtimesNanoAt(int(dir.Fd()), filepath.Base(path), times, unix.AT_SYMLINK_NOFOLLOW)
if err != nil {
// ignore subsequent errors
_ = dir.Close()
return errors.Wrap(err, "UtimesNanoAt")
}
return dir.Close()
return unix.UtimesNanoAt(unix.AT_FDCWD, path, times, unix.AT_SYMLINK_NOFOLLOW)
}

19
internal/fs/node_linux_test.go Normal file
View File

@ -0,0 +1,19 @@
package fs
import (
"io/fs"
"strings"
"testing"
"github.com/restic/restic/internal/errors"
"github.com/restic/restic/internal/restic"
rtest "github.com/restic/restic/internal/test"
)
func TestRestoreSymlinkTimestampsError(t *testing.T) {
d := t.TempDir()
node := restic.Node{Type: restic.NodeTypeSymlink}
err := nodeRestoreTimestamps(&node, d+"/nosuchfile")
rtest.Assert(t, errors.Is(err, fs.ErrNotExist), "want ErrNotExist, got %q", err)
rtest.Assert(t, strings.Contains(err.Error(), d), "filename not in %q", err)
}

10
internal/fs/node_netbsd.go
View File

@ -1,14 +1,6 @@
package fs
import (
"syscall"
"github.com/restic/restic/internal/restic"
)
func nodeRestoreSymlinkTimestamps(_ string, _ [2]syscall.Timespec) error {
return nil
}
import "github.com/restic/restic/internal/restic"
// nodeRestoreExtendedAttributes is a no-op on netbsd.
func nodeRestoreExtendedAttributes(_ *restic.Node, _ string) error {

10
internal/fs/node_openbsd.go
View File

@ -1,14 +1,6 @@
package fs
import (
"syscall"
"github.com/restic/restic/internal/restic"
)
func nodeRestoreSymlinkTimestamps(_ string, _ [2]syscall.Timespec) error {
return nil
}
import "github.com/restic/restic/internal/restic"
// nodeRestoreExtendedAttributes is a no-op on openbsd.
func nodeRestoreExtendedAttributes(_ *restic.Node, _ string) error {

7
internal/fs/node_solaris.go
View File

@ -1,7 +0,0 @@
package fs
import "syscall"
func nodeRestoreSymlinkTimestamps(path string, utimes [2]syscall.Timespec) error {
return nil
}

21
internal/fs/node_unix_notlinux.go Normal file
View File

@ -0,0 +1,21 @@
//go:build !linux && unix
package fs
import (
"syscall"
"github.com/restic/restic/internal/restic"
)
// utimesNano is like syscall.UtimesNano, except that it skips symlinks.
func utimesNano(path string, atime, mtime int64, typ restic.NodeType) error {
if typ == restic.NodeTypeSymlink {
return nil
}
return syscall.UtimesNano(path, []syscall.Timespec{
syscall.NsecToTimespec(atime),
syscall.NsecToTimespec(mtime),
})
}

8
internal/fs/node_windows.go
View File

@ -42,8 +42,8 @@ func lchown(_ string, _ int, _ int) (err error) {
return nil
}
// restoreSymlinkTimestamps restores timestamps for symlinks
func nodeRestoreSymlinkTimestamps(path string, utimes [2]syscall.Timespec) error {
// utimesNano is like syscall.UtimesNano, except that it sets FILE_FLAG_OPEN_REPARSE_POINT.
func utimesNano(path string, atime, mtime int64, _ restic.NodeType) error {
// tweaked version of UtimesNano from go/src/syscall/syscall_windows.go
pathp, e := syscall.UTF16PtrFromString(fixpath(path))
if e != nil {
@ -63,8 +63,8 @@ func nodeRestoreSymlinkTimestamps(path string, utimes [2]syscall.Timespec) error
}
}()
a := syscall.NsecToFiletime(syscall.TimespecToNsec(utimes[0]))
w := syscall.NsecToFiletime(syscall.TimespecToNsec(utimes[1]))
a := syscall.NsecToFiletime(atime)
w := syscall.NsecToFiletime(mtime)
return syscall.SetFileTime(h, nil, &a, &w)
}