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unix: add Lutimes

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Add Lutimes wrapping UtimesNanoAt.

Updates golang/go#30487

Change-Id: Ic5bb3b4d88be5806522eaef9bd9b8b0f5c1c8f42
Reviewed-on: https://go-review.googlesource.com/c/sys/+/164662
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Tobias Klauser
2019-03-02 14:21:52 +01:00
committed by Tobias Klauser
parent e844e0132e
commit 30e92a19ae
1 changed files with 19 additions and 0 deletions
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19
unix/syscall_unix.go
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@@ -395,3 +395,22 @@ func SetNonblock(fd int, nonblocking bool) (err error) {
func Exec(argv0 string, argv []string, envv []string) error {
return syscall.Exec(argv0, argv, envv)
}
// Lutimes sets the access and modification times tv on path. If path refers to
// a symlink, it is not dereferenced and the timestamps are set on the symlink.
// If tv is nil, the access and modification times are set to the current time.
// Otherwise tv must contain exactly 2 elements, with access time as the first
// element and modification time as the second element.
func Lutimes(path string, tv []Timeval) error {
if tv == nil {
return UtimesNanoAt(AT_FDCWD, path, nil, AT_SYMLINK_NOFOLLOW)
}
if len(tv) != 2 {
return EINVAL
}
ts := []Timespec{
NsecToTimespec(TimevalToNsec(tv[0])),
NsecToTimespec(TimevalToNsec(tv[1])),
}
return UtimesNanoAt(AT_FDCWD, path, ts, AT_SYMLINK_NOFOLLOW)
}