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  
    62  func libc_fchmodat_trampoline()
    63  
    64  //go:cgo_import_dynamic libc_fchmodat fchmodat "/usr/lib/libSystem.B.dylib"
    65  
    66  func Fchmodat(dirfd int, path string, mode uint32, flags int) error {
    67  	p, err := syscall.BytePtrFromString(path)
    68  	if err != nil {
    69  		return err
    70  	}
    71  	_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_fchmodat_trampoline),
    72  		uintptr(dirfd),
    73  		uintptr(unsafe.Pointer(p)),
    74  		uintptr(mode),
    75  		uintptr(flags),
    76  		0,
    77  		0)
    78  	if errno != 0 {
    79  		return errno
    80  	}
    81  	return nil
    82  }
    83  
    84  func libc_fchownat_trampoline()
    85  
    86  //go:cgo_import_dynamic libc_fchownat fchownat "/usr/lib/libSystem.B.dylib"
    87  
    88  func Fchownat(dirfd int, path string, uid, gid int, flags int) error {
    89  	p, err := syscall.BytePtrFromString(path)
    90  	if err != nil {
    91  		return err
    92  	}
    93  	_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_fchownat_trampoline),
    94  		uintptr(dirfd),
    95  		uintptr(unsafe.Pointer(p)),
    96  		uintptr(uid),
    97  		uintptr(gid),
    98  		uintptr(flags),
    99  		0)
   100  	if errno != 0 {
   101  		return errno
   102  	}
   103  	return nil
   104  }
   105  
   106  func libc_renameat_trampoline()
   107  
   108  //go:cgo_import_dynamic libc_renameat renameat "/usr/lib/libSystem.B.dylib"
   109  
   110  func Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) error {
   111  	oldp, err := syscall.BytePtrFromString(oldpath)
   112  	if err != nil {
   113  		return err
   114  	}
   115  	newp, err := syscall.BytePtrFromString(newpath)
   116  	if err != nil {
   117  		return err
   118  	}
   119  	_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_renameat_trampoline),
   120  		uintptr(olddirfd),
   121  		uintptr(unsafe.Pointer(oldp)),
   122  		uintptr(newdirfd),
   123  		uintptr(unsafe.Pointer(newp)),
   124  		0,
   125  		0)
   126  	if errno != 0 {
   127  		return errno
   128  	}
   129  	return nil
   130  }
   131  
   132  func libc_linkat_trampoline()
   133  
   134  //go:cgo_import_dynamic libc_linkat linkat "/usr/lib/libSystem.B.dylib"
   135  
   136  func Linkat(olddirfd int, oldpath string, newdirfd int, newpath string, flag int) error {
   137  	oldp, err := syscall.BytePtrFromString(oldpath)
   138  	if err != nil {
   139  		return err
   140  	}
   141  	newp, err := syscall.BytePtrFromString(newpath)
   142  	if err != nil {
   143  		return err
   144  	}
   145  	_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_linkat_trampoline),
   146  		uintptr(olddirfd),
   147  		uintptr(unsafe.Pointer(oldp)),
   148  		uintptr(newdirfd),
   149  		uintptr(unsafe.Pointer(newp)),
   150  		uintptr(flag),
   151  		0)
   152  	if errno != 0 {
   153  		return errno
   154  	}
   155  	return nil
   156  }
   157  
   158  func libc_symlinkat_trampoline()
   159  
   160  //go:cgo_import_dynamic libc_symlinkat symlinkat "/usr/lib/libSystem.B.dylib"
   161  
   162  func Symlinkat(oldpath string, newdirfd int, newpath string) error {
   163  	oldp, err := syscall.BytePtrFromString(oldpath)
   164  	if err != nil {
   165  		return err
   166  	}
   167  	newp, err := syscall.BytePtrFromString(newpath)
   168  	if err != nil {
   169  		return err
   170  	}
   171  	_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_symlinkat_trampoline),
   172  		uintptr(unsafe.Pointer(oldp)),
   173  		uintptr(newdirfd),
   174  		uintptr(unsafe.Pointer(newp)),
   175  		0,
   176  		0,
   177  		0)
   178  	if errno != 0 {
   179  		return errno
   180  	}
   181  	return nil
   182  }
   183
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