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unix/amd64: add Utimensat call, pass 0 for flags

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This CL adds the Utimensat syscall and AT_SYMLINK_NOFOLLOW constant.

This is required for setting the access/modification times on symlinks.

In addition, it updates the UtimesNano function to pass 0 as the flags
parameter, to avoid potentially passing junk.

Change-Id: I280645f3f53173628b1e1986bc7a47bac254fcf8
Reviewed-on: https://go-review.googlesource.com/9379
Reviewed-by: Rob Pike <r@golang.org>
This commit is contained in:
Peter Waller
2015-04-28 19:47:47 +01:00
committed by Rob Pike
parent 65705ef9e9
commit 0a2b4af5eb
8 changed files with 27 additions and 12 deletions
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11
unix/syscall_linux.go
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@@ -67,13 +67,13 @@ func Utimes(path string, tv []Timeval) (err error) {
return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
}
//sys utimensat(dirfd int, path string, times *[2]Timespec) (err error)
//sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
func UtimesNano(path string, ts []Timespec) (err error) {
if len(ts) != 2 {
return EINVAL
}
err = utimensat(_AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])))
err = utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
if err != ENOSYS {
return err
}
@@ -87,6 +87,13 @@ func UtimesNano(path string, ts []Timespec) (err error) {
return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
}
func UtimesNanoAt(dirfd int, path string, ts []Timespec, flags int) (err error) {
if len(ts) != 2 {
return EINVAL
}
return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), flags)
}
//sys futimesat(dirfd int, path *byte, times *[2]Timeval) (err error)
func Futimesat(dirfd int, path string, tv []Timeval) (err error) {

4
unix/types_linux.go
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@@ -385,7 +385,9 @@ type Ustat_t C.struct_ustat
type EpollEvent C.struct_my_epoll_event
const (
_AT_FDCWD = C.AT_FDCWD
AT_FDCWD = C.AT_FDCWD
AT_REMOVEDIR = C.AT_REMOVEDIR
AT_SYMLINK_NOFOLLOW = C.AT_SYMLINK_NOFOLLOW
)
// Terminal handling

4
unix/zsyscall_linux_386.go
View File

@@ -82,13 +82,13 @@ func utimes(path string, times *[2]Timeval) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func utimensat(dirfd int, path string, times *[2]Timespec) (err error) {
func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
return
}
_, _, e1 := Syscall(SYS_UTIMENSAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(times)))
_, _, e1 := Syscall6(SYS_UTIMENSAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(times)), uintptr(flags), 0, 0)
use(unsafe.Pointer(_p0))
if e1 != 0 {
err = errnoErr(e1)

4
unix/zsyscall_linux_amd64.go
View File

@@ -82,13 +82,13 @@ func utimes(path string, times *[2]Timeval) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func utimensat(dirfd int, path string, times *[2]Timespec) (err error) {
func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
return
}
_, _, e1 := Syscall(SYS_UTIMENSAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(times)))
_, _, e1 := Syscall6(SYS_UTIMENSAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(times)), uintptr(flags), 0, 0)
use(unsafe.Pointer(_p0))
if e1 != 0 {
err = errnoErr(e1)

4
unix/zsyscall_linux_arm.go
View File

@@ -82,13 +82,13 @@ func utimes(path string, times *[2]Timeval) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func utimensat(dirfd int, path string, times *[2]Timespec) (err error) {
func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
return
}
_, _, e1 := Syscall(SYS_UTIMENSAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(times)))
_, _, e1 := Syscall6(SYS_UTIMENSAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(times)), uintptr(flags), 0, 0)
use(unsafe.Pointer(_p0))
if e1 != 0 {
err = errnoErr(e1)

4
unix/ztypes_linux_386.go
View File

@@ -572,7 +572,9 @@ type EpollEvent struct {
}
const (
_AT_FDCWD = -0x64
AT_FDCWD = -0x64
AT_SYMLINK_NOFOLLOW = 0x100
AT_REMOVEDIR = 0x200
)
type Termios struct {

4
unix/ztypes_linux_amd64.go
View File

@@ -590,7 +590,9 @@ type EpollEvent struct {
}
const (
_AT_FDCWD = -0x64
AT_FDCWD = -0x64
AT_SYMLINK_NOFOLLOW = 0x100
AT_REMOVEDIR = 0x200
)
type Termios struct {

4
unix/ztypes_linux_arm.go
View File

@@ -561,7 +561,9 @@ type EpollEvent struct {
}
const (
_AT_FDCWD = -0x64
AT_FDCWD = -0x64
AT_SYMLINK_NOFOLLOW = 0x100
AT_REMOVEDIR = 0x200
)
type Termios struct {