1package sysfs
 2
 3import (
 4	"syscall"
 5	_ "unsafe"
 6
 7	experimentalsys "github.com/tetratelabs/wazero/experimental/sys"
 8)
 9
10const (
11	_AT_FDCWD            = -0x2
12	_AT_SYMLINK_NOFOLLOW = 0x0020
13	_UTIME_OMIT          = -2
14)
15
16//go:noescape
17//go:linkname utimensat syscall.utimensat
18func utimensat(dirfd int, path string, times *[2]syscall.Timespec, flags int) error
19
20func utimens(path string, atim, mtim int64) experimentalsys.Errno {
21	times := timesToTimespecs(atim, mtim)
22	if times == nil {
23		return 0
24	}
25	var flags int
26	return experimentalsys.UnwrapOSError(utimensat(_AT_FDCWD, path, times, flags))
27}
28
29func futimens(fd uintptr, atim, mtim int64) experimentalsys.Errno {
30	times := timesToTimespecs(atim, mtim)
31	if times == nil {
32		return 0
33	}
34	_p0 := timesToPtr(times)
35
36	// Warning: futimens only exists since High Sierra (10.13).
37	_, _, e1 := syscall_syscall6(libc_futimens_trampoline_addr, fd, uintptr(_p0), 0, 0, 0, 0)
38	return experimentalsys.UnwrapOSError(e1)
39}
40
41// libc_futimens_trampoline_addr is the address of the
42// `libc_futimens_trampoline` symbol, defined in `futimens_darwin.s`.
43//
44// We use this to invoke the syscall through syscall_syscall6 imported below.
45var libc_futimens_trampoline_addr uintptr
46
47// Imports the futimens symbol from libc as `libc_futimens`.
48//
49// Note: CGO mechanisms are used in darwin regardless of the CGO_ENABLED value
50// or the "cgo" build flag. See /RATIONALE.md for why.
51//go:cgo_import_dynamic libc_futimens futimens "/usr/lib/libSystem.B.dylib"