at_darwin.go

     1  // Copyright 2024 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build darwin
     6  
     7  package unix
     8  
     9  import (
    10  	"internal/abi"
    11  	"syscall"
    12  	"unsafe"
    13  )
    14  
    15  func libc_readlinkat_trampoline()
    16  
    17  //go:cgo_import_dynamic libc_readlinkat readlinkat "/usr/lib/libSystem.B.dylib"
    18  
    19  func Readlinkat(dirfd int, path string, buf []byte) (int, error) {
    20  	p0, err := syscall.BytePtrFromString(path)
    21  	if err != nil {
    22  		return 0, err
    23  	}
    24  	var p1 unsafe.Pointer
    25  	if len(buf) > 0 {
    26  		p1 = unsafe.Pointer(&buf[0])
    27  	} else {
    28  		p1 = unsafe.Pointer(&_zero)
    29  	}
    30  	n, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_readlinkat_trampoline),
    31  		uintptr(dirfd),
    32  		uintptr(unsafe.Pointer(p0)),
    33  		uintptr(p1),
    34  		uintptr(len(buf)),
    35  		0,
    36  		0)
    37  	if errno != 0 {
    38  		return 0, errno
    39  	}
    40  	return int(n), nil
    41  }
    42  
    43  func libc_mkdirat_trampoline()
    44  
    45  //go:cgo_import_dynamic libc_mkdirat mkdirat "/usr/lib/libSystem.B.dylib"
    46  
    47  func Mkdirat(dirfd int, path string, mode uint32) error {
    48  	p, err := syscall.BytePtrFromString(path)
    49  	if err != nil {
    50  		return err
    51  	}
    52  	_, _, errno := syscall_syscall(abi.FuncPCABI0(libc_mkdirat_trampoline),
    53  		uintptr(dirfd),
    54  		uintptr(unsafe.Pointer(p)),
    55  		uintptr(mode))
    56  	if errno != 0 {
    57  		return errno
    58  	}
    59  	return nil
    60  }
    61
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