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unix: use fchmodat2 in Fchmodat

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The fchmodat2 syscall was added in Linux kernel 6.6. Use it in Fchmodat
if flags are given. It will return ENOSYS on older kernels (or EINVAL or
any other bogus error in some container implementations).

Fixes golang/go#61636

Change-Id: Ibbc9a08733b7186907b2fe5837cb997446c38357
Reviewed-on: https://go-review.googlesource.com/c/sys/+/539635
Reviewed-by: Heschi Kreinick <heschi@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
This commit is contained in:
Tobias Klauser
2023-11-06 18:22:10 +00:00
parent ec230dae7f
commit 2d0c73638b
2 changed files with 31 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
unix/zsyscall_linux.go
+15
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@@ -37,6 +37,21 @@ func fchmodat(dirfd int, path string, mode uint32) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func fchmodat2(dirfd int, path string, mode uint32, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
return
}
_, _, e1 := Syscall6(SYS_FCHMODAT2, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func ioctl(fd int, req uint, arg uintptr) (err error) {
_, _, e1 := Syscall(SYS_IOCTL, uintptr(fd), uintptr(req), uintptr(arg))
if e1 != 0 {