posix/bits/unistd.h

   1 /* Checking macros for unistd functions.
   2    Copyright (C) 2005-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _UNISTD_H
  20 # error "Never include <bits/unistd.h> directly; use <unistd.h> instead."
  21 #endif
  22
  23 # include <bits/unistd-decl.h>
  24
  25 __fortify_function __wur ssize_t
  26 read (int __fd, void *__buf, size_t __nbytes)
  27 {
  28   return __glibc_fortify (read, __nbytes, sizeof (char),
  29                           __glibc_objsize0 (__buf),
  30                           __fd, __buf, __nbytes);
  31 }
  32
  33 #if defined __USE_UNIX98 || defined __USE_XOPEN2K8
  34 # ifndef __USE_FILE_OFFSET64
  35 __fortify_function __wur ssize_t
  36 pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset)
  37 {
  38   return __glibc_fortify (pread, __nbytes, sizeof (char),
  39                           __glibc_objsize0 (__buf),
  40                           __fd, __buf, __nbytes, __offset);
  41 }
  42 # else
  43 __fortify_function __wur ssize_t
  44 pread (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
  45 {
  46   return __glibc_fortify (pread64, __nbytes, sizeof (char),
  47                           __glibc_objsize0 (__buf),
  48                           __fd, __buf, __nbytes, __offset);
  49 }
  50 # endif
  51
  52 # ifdef __USE_LARGEFILE64
  53 __fortify_function __wur ssize_t
  54 pread64 (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
  55 {
  56   return __glibc_fortify (pread64, __nbytes, sizeof (char),
  57                           __glibc_objsize0 (__buf),
  58                           __fd, __buf, __nbytes, __offset);
  59 }
  60 # endif
  61 #endif
  62
  63 #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
  64 __fortify_function __nonnull ((1, 2)) __wur ssize_t
  65 __NTH (readlink (const char *__restrict __path, char *__restrict __buf,
  66                  size_t __len))
  67 {
  68   return __glibc_fortify (readlink, __len, sizeof (char),
  69                           __glibc_objsize (__buf),
  70                           __path, __buf, __len);
  71 }
  72 #endif
  73
  74 #ifdef __USE_ATFILE
  75 __fortify_function __nonnull ((2, 3)) __wur ssize_t
  76 __NTH (readlinkat (int __fd, const char *__restrict __path,
  77                    char *__restrict __buf, size_t __len))
  78 {
  79   return __glibc_fortify (readlinkat, __len, sizeof (char),
  80                           __glibc_objsize (__buf),
  81                           __fd, __path, __buf, __len);
  82 }
  83 #endif
  84
  85 __fortify_function __wur char *
  86 __NTH (getcwd (char *__buf, size_t __size))
  87 {
  88   return __glibc_fortify (getcwd, __size, sizeof (char),
  89                           __glibc_objsize (__buf),
  90                           __buf, __size);
  91 }
  92
  93 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
  94 __fortify_function __nonnull ((1)) __attribute_deprecated__ __wur char *
  95 __NTH (getwd (char *__buf))
  96 {
  97   if (__glibc_objsize (__buf) != (size_t) -1)
  98     return __getwd_chk (__buf, __glibc_objsize (__buf));
  99   return __getwd_warn (__buf);
 100 }
 101 #endif
 102
 103 __fortify_function size_t
 104 __NTH (confstr (int __name, char *__buf, size_t __len))
 105 {
 106   return __glibc_fortify (confstr, __len, sizeof (char),
 107                           __glibc_objsize (__buf),
 108                           __name, __buf, __len);
 109 }
 110
 111
 112 __fortify_function int
 113 __NTH (getgroups (int __size, __gid_t __list[]))
 114 {
 115   return __glibc_fortify (getgroups, __size, sizeof (__gid_t),
 116                           __glibc_objsize (__list),
 117                           __size, __list);
 118 }
 119
 120
 121 __fortify_function int
 122 __NTH (ttyname_r (int __fd, char *__buf, size_t __buflen))
 123 {
 124   return __glibc_fortify (ttyname_r, __buflen, sizeof (char),
 125                           __glibc_objsize (__buf),
 126                           __fd, __buf, __buflen);
 127 }
 128
 129
 130 #ifdef __USE_POSIX199506
 131 __fortify_function int
 132 getlogin_r (char *__buf, size_t __buflen)
 133 {
 134   return __glibc_fortify (getlogin_r, __buflen, sizeof (char),
 135                           __glibc_objsize (__buf),
 136                           __buf, __buflen);
 137 }
 138 #endif
 139
 140
 141 #if defined __USE_MISC || defined __USE_UNIX98
 142 __fortify_function int
 143 __NTH (gethostname (char *__buf, size_t __buflen))
 144 {
 145   return __glibc_fortify (gethostname, __buflen, sizeof (char),
 146                           __glibc_objsize (__buf),
 147                           __buf, __buflen);
 148 }
 149 #endif
 150
 151
 152 #if defined __USE_MISC || (defined __USE_XOPEN && !defined __USE_UNIX98)
 153 __fortify_function int
 154 __NTH (getdomainname (char *__buf, size_t __buflen))
 155 {
 156   return __glibc_fortify (getdomainname, __buflen, sizeof (char),
 157                           __glibc_objsize (__buf),
 158                           __buf, __buflen);
 159 }
 160 #endif