github.com/tetratelabs/wazero@v1.2.1/internal/sysfs/futimens_darwin.go (about)

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