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internal/syscall/unix: implement Eaccess on darwin

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Like on other Unix-like platforms, use faccessat(AT_FDCWD, path, mode,
AT_EACCESS).

Change-Id: I6e04b4244f8e90bd3b35b1b8a9ca38fe845b34ae
Reviewed-on: https://go-review.googlesource.com/c/go/+/579976
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
This commit is contained in:
Tobias Klauser 2024-04-18 09:39:31 +02:00 committed by Gopher Robot
parent 104c293ffe
commit 974b2011ca
4 changed files with 40 additions and 4 deletions
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1
src/internal/syscall/unix/asm_darwin.s
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@ -22,3 +22,4 @@ TEXT ·libc_getpwuid_r_trampoline(SB),NOSPLIT,$0-0; JMP libc_getpwuid_r(SB)
TEXT ·libc_getgrnam_r_trampoline(SB),NOSPLIT,$0-0; JMP libc_getgrnam_r(SB)
TEXT ·libc_getgrgid_r_trampoline(SB),NOSPLIT,$0-0; JMP libc_getgrgid_r(SB)
TEXT ·libc_sysconf_trampoline(SB),NOSPLIT,$0-0; JMP libc_sysconf(SB)
TEXT ·libc_faccessat_trampoline(SB),NOSPLIT,$0-0; JMP libc_faccessat(SB)

10
src/internal/syscall/unix/at_sysnum_darwin.go
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@ -4,7 +4,11 @@
package unix
const AT_REMOVEDIR = 0x80
const AT_SYMLINK_NOFOLLOW = 0x0020
const (
AT_EACCESS = 0x10
AT_FDCWD = -0x2
AT_REMOVEDIR = 0x80
AT_SYMLINK_NOFOLLOW = 0x0020
const UTIME_OMIT = -0x2
UTIME_OMIT = -0x2
)

31
src/internal/syscall/unix/eaccess_darwin.go Normal file
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@ -0,0 +1,31 @@
// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package unix
import (
"internal/abi"
"syscall"
"unsafe"
)
func libc_faccessat_trampoline()
//go:cgo_import_dynamic libc_faccessat faccessat "/usr/lib/libSystem.B.dylib"
func faccessat(dirfd int, path string, mode uint32, flags int) error {
p, err := syscall.BytePtrFromString(path)
if err != nil {
return err
}
_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_faccessat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(p)), uintptr(mode), uintptr(flags), 0, 0)
if errno != 0 {
return errno
}
return nil
}
func Eaccess(path string, mode uint32) error {
return faccessat(AT_FDCWD, path, mode, AT_EACCESS)
}

2
src/internal/syscall/unix/eaccess_other.go
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@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build unix && !dragonfly && !freebsd && !linux && !openbsd && !netbsd
//go:build unix && !darwin && !dragonfly && !freebsd && !linux && !openbsd && !netbsd
package unix