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unix: drop fallback to utimes in UtimesNano on Linux

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Same as CL 346790 does for package syscall.

The minimum required Linux kernel version for Go 1.18 will be changed to
2.6.32, see golang/go#45964. The current minimum required version is
2.6.23 and utimensat was added in 2.6.22, so the fallback isn't even
necessary for the current minimum supported version. Remove the fallback
to utimes.

For golang/go#45964

Change-Id: Iaed782d182851c9ccff32f831e1704bae52662a6
Reviewed-on: https://go-review.googlesource.com/c/sys/+/346829
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matt Layher <mdlayher@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Tobias Klauser
2021-09-02 05:02:39 +00:00
committed by Tobias Klauser
parent f4d43177bf
commit 164ac21ac1
1 changed files with 1 additions and 21 deletions
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unix/syscall_linux.go
+1 -21
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@@ -168,27 +168,7 @@ func Utimes(path string, tv []Timeval) error {
//sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
func UtimesNano(path string, ts []Timespec) error {
if ts == nil {
err := utimensat(AT_FDCWD, path, nil, 0)
if err != ENOSYS {
return err
}
return utimes(path, nil)
}
if len(ts) != 2 {
return EINVAL
}
err := utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
if err != ENOSYS {
return err
}
// If the utimensat syscall isn't available (utimensat was added to Linux
// in 2.6.22, Released, 8 July 2007) then fall back to utimes
var tv [2]Timeval
for i := 0; i < 2; i++ {
tv[i] = NsecToTimeval(TimespecToNsec(ts[i]))
}
return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
return UtimesNanoAt(AT_FDCWD, path, ts, 0)
}
func UtimesNanoAt(dirfd int, path string, ts []Timespec, flags int) error {