at_openbsd.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 openbsd && !mips64
     6  
     7  package unix
     8  
     9  import (
    10  	"internal/abi"
    11  	"syscall"
    12  	"unsafe"
    13  )
    14  
    15  //go:cgo_import_dynamic libc_readlinkat readlinkat "libc.so"
    16  
    17  func libc_readlinkat_trampoline()
    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), uintptr(dirfd), uintptr(unsafe.Pointer(p0)), uintptr(p1), uintptr(len(buf)), 0, 0)
    31  	if errno != 0 {
    32  		return 0, errno
    33  	}
    34  	return int(n), nil
    35  }
    36  
    37  //go:cgo_import_dynamic libc_mkdirat mkdirat "libc.so"
    38  
    39  func libc_mkdirat_trampoline()
    40  
    41  func Mkdirat(dirfd int, path string, mode uint32) error {
    42  	p, err := syscall.BytePtrFromString(path)
    43  	if err != nil {
    44  		return err
    45  	}
    46  	_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_mkdirat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(p)), 0, 0, 0, 0)
    47  	if errno != 0 {
    48  		return errno
    49  	}
    50  	return nil
    51  }
    52  
    53  //go:cgo_import_dynamic libc_fchmodat fchmodat "libc.so"
    54  
    55  func libc_fchmodat_trampoline()
    56  
    57  func Fchmodat(dirfd int, path string, mode uint32, flags int) error {
    58  	p, err := syscall.BytePtrFromString(path)
    59  	if err != nil {
    60  		return err
    61  	}
    62  	_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_fchmodat_trampoline),
    63  		uintptr(dirfd),
    64  		uintptr(unsafe.Pointer(p)),
    65  		uintptr(mode),
    66  		uintptr(flags),
    67  		0,
    68  		0)
    69  	if errno != 0 {
    70  		return errno
    71  	}
    72  	return nil
    73  }
    74  
    75  //go:cgo_import_dynamic libc_fchownat fchownat "libc.so"
    76  
    77  func libc_fchownat_trampoline()
    78  
    79  func Fchownat(dirfd int, path string, uid, gid int, flags int) error {
    80  	p, err := syscall.BytePtrFromString(path)
    81  	if err != nil {
    82  		return err
    83  	}
    84  	_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_fchownat_trampoline),
    85  		uintptr(dirfd),
    86  		uintptr(unsafe.Pointer(p)),
    87  		uintptr(uid),
    88  		uintptr(gid),
    89  		uintptr(flags),
    90  		0)
    91  	if errno != 0 {
    92  		return errno
    93  	}
    94  	return nil
    95  }
    96  
    97  //go:cgo_import_dynamic libc_renameat renameat "libc.so"
    98  
    99  func libc_renameat_trampoline()
   100  
   101  func Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) error {
   102  	oldp, err := syscall.BytePtrFromString(oldpath)
   103  	if err != nil {
   104  		return err
   105  	}
   106  	newp, err := syscall.BytePtrFromString(newpath)
   107  	if err != nil {
   108  		return err
   109  	}
   110  	_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_renameat_trampoline),
   111  		uintptr(olddirfd),
   112  		uintptr(unsafe.Pointer(oldp)),
   113  		uintptr(newdirfd),
   114  		uintptr(unsafe.Pointer(newp)),
   115  		0,
   116  		0)
   117  	if errno != 0 {
   118  		return errno
   119  	}
   120  	return nil
   121  }
   122  
   123  func libc_linkat_trampoline()
   124  
   125  //go:cgo_import_dynamic libc_linkat linkat "libc.so"
   126  
   127  func Linkat(olddirfd int, oldpath string, newdirfd int, newpath string, flag int) error {
   128  	oldp, err := syscall.BytePtrFromString(oldpath)
   129  	if err != nil {
   130  		return err
   131  	}
   132  	newp, err := syscall.BytePtrFromString(newpath)
   133  	if err != nil {
   134  		return err
   135  	}
   136  	_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_linkat_trampoline),
   137  		uintptr(olddirfd),
   138  		uintptr(unsafe.Pointer(oldp)),
   139  		uintptr(newdirfd),
   140  		uintptr(unsafe.Pointer(newp)),
   141  		uintptr(flag),
   142  		0)
   143  	if errno != 0 {
   144  		return errno
   145  	}
   146  	return nil
   147  }
   148  
   149  func libc_symlinkat_trampoline()
   150  
   151  //go:cgo_import_dynamic libc_symlinkat symlinkat "libc.so"
   152  
   153  func Symlinkat(oldpath string, newdirfd int, newpath string) error {
   154  	oldp, err := syscall.BytePtrFromString(oldpath)
   155  	if err != nil {
   156  		return err
   157  	}
   158  	newp, err := syscall.BytePtrFromString(newpath)
   159  	if err != nil {
   160  		return err
   161  	}
   162  	_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_symlinkat_trampoline),
   163  		uintptr(unsafe.Pointer(oldp)),
   164  		uintptr(newdirfd),
   165  		uintptr(unsafe.Pointer(newp)),
   166  		0,
   167  		0,
   168  		0)
   169  	if errno != 0 {
   170  		return errno
   171  	}
   172  	return nil
   173  }
   174
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