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/* Checking macros for unistd functions. |
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Copyright (C) 2005-2016 Free Software Foundation, Inc. |
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This file is part of the GNU C Library. |
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The GNU C Library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Lesser General Public |
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License as published by the Free Software Foundation; either |
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version 2.1 of the License, or (at your option) any later version. |
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The GNU C Library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public |
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License along with the GNU C Library; if not, see |
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. */ |
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#ifndef _UNISTD_H |
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# error "Never include directly; use instead." |
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#endif |
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extern ssize_t __read_chk (int __fd, void *__buf, size_t __nbytes, |
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size_t __buflen) __wur; |
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extern ssize_t __REDIRECT (__read_alias, (int __fd, void *__buf, |
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size_t __nbytes), read) __wur; |
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extern ssize_t __REDIRECT (__read_chk_warn, |
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(int __fd, void *__buf, size_t __nbytes, |
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size_t __buflen), __read_chk) |
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__wur __warnattr ("read called with bigger length than size of " |
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"the destination buffer"); |
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__fortify_function __wur ssize_t |
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read (int __fd, void *__buf, size_t __nbytes) |
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{ |
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if (__bos0 (__buf) != (size_t) -1) |
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{ |
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if (!__builtin_constant_p (__nbytes)) |
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return __read_chk (__fd, __buf, __nbytes, __bos0 (__buf)); |
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if (__nbytes > __bos0 (__buf)) |
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return __read_chk_warn (__fd, __buf, __nbytes, __bos0 (__buf)); |
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} |
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return __read_alias (__fd, __buf, __nbytes); |
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} |
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#ifdef __USE_UNIX98 |
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extern ssize_t __pread_chk (int __fd, void *__buf, size_t __nbytes, |
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__off_t __offset, size_t __bufsize) __wur; |
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extern ssize_t __pread64_chk (int __fd, void *__buf, size_t __nbytes, |
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__off64_t __offset, size_t __bufsize) __wur; |
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extern ssize_t __REDIRECT (__pread_alias, |
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(int __fd, void *__buf, size_t __nbytes, |
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__off_t __offset), pread) __wur; |
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extern ssize_t __REDIRECT (__pread64_alias, |
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(int __fd, void *__buf, size_t __nbytes, |
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__off64_t __offset), pread64) __wur; |
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extern ssize_t __REDIRECT (__pread_chk_warn, |
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(int __fd, void *__buf, size_t __nbytes, |
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__off_t __offset, size_t __bufsize), __pread_chk) |
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__wur __warnattr ("pread called with bigger length than size of " |
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"the destination buffer"); |
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extern ssize_t __REDIRECT (__pread64_chk_warn, |
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(int __fd, void *__buf, size_t __nbytes, |
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__off64_t __offset, size_t __bufsize), |
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__pread64_chk) |
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__wur __warnattr ("pread64 called with bigger length than size of " |
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"the destination buffer"); |
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# ifndef __USE_FILE_OFFSET64 |
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__fortify_function __wur ssize_t |
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pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset) |
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{ |
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if (__bos0 (__buf) != (size_t) -1) |
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{ |
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if (!__builtin_constant_p (__nbytes)) |
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return __pread_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf)); |
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if ( __nbytes > __bos0 (__buf)) |
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return __pread_chk_warn (__fd, __buf, __nbytes, __offset, |
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__bos0 (__buf)); |
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} |
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return __pread_alias (__fd, __buf, __nbytes, __offset); |
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} |
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# else |
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__fortify_function __wur ssize_t |
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pread (int __fd, void *__buf, size_t __nbytes, __off64_t __offset) |
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{ |
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if (__bos0 (__buf) != (size_t) -1) |
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{ |
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if (!__builtin_constant_p (__nbytes)) |
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return __pread64_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf)); |
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if ( __nbytes > __bos0 (__buf)) |
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return __pread64_chk_warn (__fd, __buf, __nbytes, __offset, |
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__bos0 (__buf)); |
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} |
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return __pread64_alias (__fd, __buf, __nbytes, __offset); |
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} |
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# endif |
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# ifdef __USE_LARGEFILE64 |
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__fortify_function __wur ssize_t |
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pread64 (int __fd, void *__buf, size_t __nbytes, __off64_t __offset) |
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{ |
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if (__bos0 (__buf) != (size_t) -1) |
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{ |
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if (!__builtin_constant_p (__nbytes)) |
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return __pread64_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf)); |
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if ( __nbytes > __bos0 (__buf)) |
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return __pread64_chk_warn (__fd, __buf, __nbytes, __offset, |
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__bos0 (__buf)); |
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} |
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return __pread64_alias (__fd, __buf, __nbytes, __offset); |
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} |
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# endif |
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#endif |
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#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K |
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extern ssize_t __readlink_chk (const char *__restrict __path, |
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char *__restrict __buf, size_t __len, |
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size_t __buflen) |
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__THROW __nonnull ((1, 2)) __wur; |
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extern ssize_t __REDIRECT_NTH (__readlink_alias, |
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(const char *__restrict __path, |
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char *__restrict __buf, size_t __len), readlink) |
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__nonnull ((1, 2)) __wur; |
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extern ssize_t __REDIRECT_NTH (__readlink_chk_warn, |
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(const char *__restrict __path, |
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char *__restrict __buf, size_t __len, |
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size_t __buflen), __readlink_chk) |
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__nonnull ((1, 2)) __wur __warnattr ("readlink called with bigger length " |
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"than size of destination buffer"); |
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__fortify_function __nonnull ((1, 2)) __wur ssize_t |
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__NTH (readlink (const char *__restrict __path, char *__restrict __buf, |
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size_t __len)) |
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{ |
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if (__bos (__buf) != (size_t) -1) |
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{ |
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if (!__builtin_constant_p (__len)) |
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return __readlink_chk (__path, __buf, __len, __bos (__buf)); |
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if ( __len > __bos (__buf)) |
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return __readlink_chk_warn (__path, __buf, __len, __bos (__buf)); |
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} |
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return __readlink_alias (__path, __buf, __len); |
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} |
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#endif |
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154
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#ifdef __USE_ATFILE |
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extern ssize_t __readlinkat_chk (int __fd, const char *__restrict __path, |
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char *__restrict __buf, size_t __len, |
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size_t __buflen) |
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__THROW __nonnull ((2, 3)) __wur; |
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extern ssize_t __REDIRECT_NTH (__readlinkat_alias, |
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(int __fd, const char *__restrict __path, |
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char *__restrict __buf, size_t __len), |
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readlinkat) |
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__nonnull ((2, 3)) __wur; |
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extern ssize_t __REDIRECT_NTH (__readlinkat_chk_warn, |
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(int __fd, const char *__restrict __path, |
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char *__restrict __buf, size_t __len, |
167
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size_t __buflen), __readlinkat_chk) |
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__nonnull ((2, 3)) __wur __warnattr ("readlinkat called with bigger " |
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"length than size of destination " |
170
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"buffer"); |
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172
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__fortify_function __nonnull ((2, 3)) __wur ssize_t |
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__NTH (readlinkat (int __fd, const char *__restrict __path, |
174
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char *__restrict __buf, size_t __len)) |
175
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{ |
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if (__bos (__buf) != (size_t) -1) |
177
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{ |
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if (!__builtin_constant_p (__len)) |
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return __readlinkat_chk (__fd, __path, __buf, __len, __bos (__buf)); |
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181
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if (__len > __bos (__buf)) |
182
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return __readlinkat_chk_warn (__fd, __path, __buf, __len, |
183
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__bos (__buf)); |
184
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} |
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return __readlinkat_alias (__fd, __path, __buf, __len); |
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} |
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#endif |
188
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189
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extern char *__getcwd_chk (char *__buf, size_t __size, size_t __buflen) |
190
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__THROW __wur; |
191
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extern char *__REDIRECT_NTH (__getcwd_alias, |
192
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(char *__buf, size_t __size), getcwd) __wur; |
193
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extern char *__REDIRECT_NTH (__getcwd_chk_warn, |
194
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(char *__buf, size_t __size, size_t __buflen), |
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__getcwd_chk) |
196
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__wur __warnattr ("getcwd caller with bigger length than size of " |
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"destination buffer"); |
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199
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__fortify_function __wur char * |
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__NTH (getcwd (char *__buf, size_t __size)) |
201
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{ |
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if (__bos (__buf) != (size_t) -1) |
203
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{ |
204
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if (!__builtin_constant_p (__size)) |
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return __getcwd_chk (__buf, __size, __bos (__buf)); |
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207
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if (__size > __bos (__buf)) |
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return __getcwd_chk_warn (__buf, __size, __bos (__buf)); |
209
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} |
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return __getcwd_alias (__buf, __size); |
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} |
212
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213
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#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED |
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extern char *__getwd_chk (char *__buf, size_t buflen) |
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__THROW __nonnull ((1)) __wur; |
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extern char *__REDIRECT_NTH (__getwd_warn, (char *__buf), getwd) |
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__nonnull ((1)) __wur __warnattr ("please use getcwd instead, as getwd " |
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"doesn't specify buffer size"); |
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__fortify_function __nonnull ((1)) __attribute_deprecated__ __wur char * |
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__NTH (getwd (char *__buf)) |
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{ |
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if (__bos (__buf) != (size_t) -1) |
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return __getwd_chk (__buf, __bos (__buf)); |
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return __getwd_warn (__buf); |
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} |
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#endif |
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extern size_t __confstr_chk (int __name, char *__buf, size_t __len, |
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size_t __buflen) __THROW; |
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extern size_t __REDIRECT_NTH (__confstr_alias, (int __name, char *__buf, |
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size_t __len), confstr); |
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extern size_t __REDIRECT_NTH (__confstr_chk_warn, |
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(int __name, char *__buf, size_t __len, |
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size_t __buflen), __confstr_chk) |
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__warnattr ("confstr called with bigger length than size of destination " |
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"buffer"); |
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__fortify_function size_t |
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__NTH (confstr (int __name, char *__buf, size_t __len)) |
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{ |
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if (__bos (__buf) != (size_t) -1) |
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{ |
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if (!__builtin_constant_p (__len)) |
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return __confstr_chk (__name, __buf, __len, __bos (__buf)); |
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if (__bos (__buf) < __len) |
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return __confstr_chk_warn (__name, __buf, __len, __bos (__buf)); |
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} |
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return __confstr_alias (__name, __buf, __len); |
251
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} |
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253
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254
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extern int __getgroups_chk (int __size, __gid_t __list[], size_t __listlen) |
255
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__THROW __wur; |
256
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extern int __REDIRECT_NTH (__getgroups_alias, (int __size, __gid_t __list[]), |
257
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getgroups) __wur; |
258
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extern int __REDIRECT_NTH (__getgroups_chk_warn, |
259
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(int __size, __gid_t __list[], size_t __listlen), |
260
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__getgroups_chk) |
261
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__wur __warnattr ("getgroups called with bigger group count than what " |
262
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"can fit into destination buffer"); |
263
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264
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__fortify_function int |
265
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__NTH (getgroups (int __size, __gid_t __list[])) |
266
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{ |
267
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if (__bos (__list) != (size_t) -1) |
268
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{ |
269
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if (!__builtin_constant_p (__size) || __size < 0) |
270
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return __getgroups_chk (__size, __list, __bos (__list)); |
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272
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if (__size * sizeof (__gid_t) > __bos (__list)) |
273
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return __getgroups_chk_warn (__size, __list, __bos (__list)); |
274
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} |
275
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return __getgroups_alias (__size, __list); |
276
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} |
277
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278
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279
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extern int __ttyname_r_chk (int __fd, char *__buf, size_t __buflen, |
280
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size_t __nreal) __THROW __nonnull ((2)); |
281
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extern int __REDIRECT_NTH (__ttyname_r_alias, (int __fd, char *__buf, |
282
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size_t __buflen), ttyname_r) |
283
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__nonnull ((2)); |
284
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extern int __REDIRECT_NTH (__ttyname_r_chk_warn, |
285
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(int __fd, char *__buf, size_t __buflen, |
286
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size_t __nreal), __ttyname_r_chk) |
287
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__nonnull ((2)) __warnattr ("ttyname_r called with bigger buflen than " |
288
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"size of destination buffer"); |
289
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290
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__fortify_function int |
291
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__NTH (ttyname_r (int __fd, char *__buf, size_t __buflen)) |
292
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{ |
293
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if (__bos (__buf) != (size_t) -1) |
294
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{ |
295
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if (!__builtin_constant_p (__buflen)) |
296
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return __ttyname_r_chk (__fd, __buf, __buflen, __bos (__buf)); |
297
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298
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if (__buflen > __bos (__buf)) |
299
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return __ttyname_r_chk_warn (__fd, __buf, __buflen, __bos (__buf)); |
300
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} |
301
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return __ttyname_r_alias (__fd, __buf, __buflen); |
302
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} |
303
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304
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305
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|
|
#if defined __USE_REENTRANT || defined __USE_POSIX199506 |
306
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|
extern int __getlogin_r_chk (char *__buf, size_t __buflen, size_t __nreal) |
307
|
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|
|
__nonnull ((1)); |
308
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|
|
|
extern int __REDIRECT (__getlogin_r_alias, (char *__buf, size_t __buflen), |
309
|
|
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|
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|
|
getlogin_r) __nonnull ((1)); |
310
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|
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|
|
extern int __REDIRECT (__getlogin_r_chk_warn, |
311
|
|
|
|
|
|
|
(char *__buf, size_t __buflen, size_t __nreal), |
312
|
|
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|
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|
|
__getlogin_r_chk) |
313
|
|
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|
|
|
__nonnull ((1)) __warnattr ("getlogin_r called with bigger buflen than " |
314
|
|
|
|
|
|
|
"size of destination buffer"); |
315
|
|
|
|
|
|
|
|
316
|
|
|
|
|
|
|
__fortify_function int |
317
|
|
|
|
|
|
|
getlogin_r (char *__buf, size_t __buflen) |
318
|
|
|
|
|
|
|
{ |
319
|
|
|
|
|
|
|
if (__bos (__buf) != (size_t) -1) |
320
|
|
|
|
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|
|
{ |
321
|
|
|
|
|
|
|
if (!__builtin_constant_p (__buflen)) |
322
|
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|
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|
|
return __getlogin_r_chk (__buf, __buflen, __bos (__buf)); |
323
|
|
|
|
|
|
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|
324
|
|
|
|
|
|
|
if (__buflen > __bos (__buf)) |
325
|
|
|
|
|
|
|
return __getlogin_r_chk_warn (__buf, __buflen, __bos (__buf)); |
326
|
|
|
|
|
|
|
} |
327
|
|
|
|
|
|
|
return __getlogin_r_alias (__buf, __buflen); |
328
|
|
|
|
|
|
|
} |
329
|
|
|
|
|
|
|
#endif |
330
|
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331
|
|
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332
|
|
|
|
|
|
|
#if defined __USE_MISC || defined __USE_UNIX98 |
333
|
|
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|
|
|
|
extern int __gethostname_chk (char *__buf, size_t __buflen, size_t __nreal) |
334
|
|
|
|
|
|
|
__THROW __nonnull ((1)); |
335
|
|
|
|
|
|
|
extern int __REDIRECT_NTH (__gethostname_alias, (char *__buf, size_t __buflen), |
336
|
|
|
|
|
|
|
gethostname) __nonnull ((1)); |
337
|
|
|
|
|
|
|
extern int __REDIRECT_NTH (__gethostname_chk_warn, |
338
|
|
|
|
|
|
|
(char *__buf, size_t __buflen, size_t __nreal), |
339
|
|
|
|
|
|
|
__gethostname_chk) |
340
|
|
|
|
|
|
|
__nonnull ((1)) __warnattr ("gethostname called with bigger buflen than " |
341
|
|
|
|
|
|
|
"size of destination buffer"); |
342
|
|
|
|
|
|
|
|
343
|
|
|
|
|
|
|
__fortify_function int |
344
|
|
|
|
|
|
|
__NTH (gethostname (char *__buf, size_t __buflen)) |
345
|
|
|
|
|
|
|
{ |
346
|
|
|
|
|
|
|
if (__bos (__buf) != (size_t) -1) |
347
|
|
|
|
|
|
|
{ |
348
|
|
|
|
|
|
|
if (!__builtin_constant_p (__buflen)) |
349
|
|
|
|
|
|
|
return __gethostname_chk (__buf, __buflen, __bos (__buf)); |
350
|
|
|
|
|
|
|
|
351
|
|
|
|
|
|
|
if (__buflen > __bos (__buf)) |
352
|
|
|
|
|
|
|
return __gethostname_chk_warn (__buf, __buflen, __bos (__buf)); |
353
|
|
|
|
|
|
|
} |
354
|
|
|
|
|
|
|
return __gethostname_alias (__buf, __buflen); |
355
|
|
|
|
|
|
|
} |
356
|
|
|
|
|
|
|
#endif |
357
|
|
|
|
|
|
|
|
358
|
|
|
|
|
|
|
|
359
|
|
|
|
|
|
|
#if defined __USE_MISC || (defined __USE_XOPEN && !defined __USE_UNIX98) |
360
|
|
|
|
|
|
|
extern int __getdomainname_chk (char *__buf, size_t __buflen, size_t __nreal) |
361
|
|
|
|
|
|
|
__THROW __nonnull ((1)) __wur; |
362
|
|
|
|
|
|
|
extern int __REDIRECT_NTH (__getdomainname_alias, (char *__buf, |
363
|
|
|
|
|
|
|
size_t __buflen), |
364
|
|
|
|
|
|
|
getdomainname) __nonnull ((1)) __wur; |
365
|
|
|
|
|
|
|
extern int __REDIRECT_NTH (__getdomainname_chk_warn, |
366
|
|
|
|
|
|
|
(char *__buf, size_t __buflen, size_t __nreal), |
367
|
|
|
|
|
|
|
__getdomainname_chk) |
368
|
|
|
|
|
|
|
__nonnull ((1)) __wur __warnattr ("getdomainname called with bigger " |
369
|
|
|
|
|
|
|
"buflen than size of destination " |
370
|
|
|
|
|
|
|
"buffer"); |
371
|
|
|
|
|
|
|
|
372
|
|
|
|
|
|
|
__fortify_function int |
373
|
|
|
|
|
|
|
__NTH (getdomainname (char *__buf, size_t __buflen)) |
374
|
|
|
|
|
|
|
{ |
375
|
|
|
|
|
|
|
if (__bos (__buf) != (size_t) -1) |
376
|
|
|
|
|
|
|
{ |
377
|
|
|
|
|
|
|
if (!__builtin_constant_p (__buflen)) |
378
|
|
|
|
|
|
|
return __getdomainname_chk (__buf, __buflen, __bos (__buf)); |
379
|
|
|
|
|
|
|
|
380
|
|
|
|
|
|
|
if (__buflen > __bos (__buf)) |
381
|
|
|
|
|
|
|
return __getdomainname_chk_warn (__buf, __buflen, __bos (__buf)); |
382
|
|
|
|
|
|
|
} |
383
|
|
|
|
|
|
|
return __getdomainname_alias (__buf, __buflen); |
384
|
|
|
|
|
|
|
} |
385
|
|
|
|
|
|
|
#endif |