GoToSocial/vendor/github.com/tetratelabs/wazero/internal/sysfs/futimens_linux.go

50 lines
1.2 KiB
Go
Raw Normal View History

//go:build !tinygo
package sysfs
import (
"syscall"
"unsafe"
_ "unsafe"
experimentalsys "github.com/tetratelabs/wazero/experimental/sys"
)
const (
_AT_FDCWD = -0x64
_UTIME_OMIT = (1 << 30) - 2
)
func utimens(path string, atim, mtim int64) experimentalsys.Errno {
times := timesToTimespecs(atim, mtim)
if times == nil {
return 0
}
var flags int
var _p0 *byte
_p0, err := syscall.BytePtrFromString(path)
if err == nil {
err = utimensat(_AT_FDCWD, uintptr(unsafe.Pointer(_p0)), times, flags)
}
return experimentalsys.UnwrapOSError(err)
}
// On linux, implement futimens via utimensat with the NUL path.
func futimens(fd uintptr, atim, mtim int64) experimentalsys.Errno {
times := timesToTimespecs(atim, mtim)
if times == nil {
return 0
}
return experimentalsys.UnwrapOSError(utimensat(int(fd), 0 /* NUL */, times, 0))
}
// utimensat is like syscall.utimensat special-cased to accept a NUL string for the path value.
func utimensat(dirfd int, strPtr uintptr, times *[2]syscall.Timespec, flags int) (err error) {
_, _, e1 := syscall.Syscall6(syscall.SYS_UTIMENSAT, uintptr(dirfd), strPtr, uintptr(unsafe.Pointer(times)), uintptr(flags), 0, 0)
if e1 != 0 {
err = e1
}
return
}