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386 lines
13 KiB
C
386 lines
13 KiB
C
/* 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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<http://www.gnu.org/licenses/>. */
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#ifndef _UNISTD_H
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# error "Never include <bits/unistd.h> directly; use <unistd.h> 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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#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,
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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 "
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"buffer");
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__fortify_function __nonnull ((2, 3)) __wur ssize_t
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__NTH (readlinkat (int __fd, const char *__restrict __path,
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char *__restrict __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 __readlinkat_chk (__fd, __path, __buf, __len, __bos (__buf));
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if (__len > __bos (__buf))
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return __readlinkat_chk_warn (__fd, __path, __buf, __len,
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__bos (__buf));
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}
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return __readlinkat_alias (__fd, __path, __buf, __len);
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}
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#endif
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extern char *__getcwd_chk (char *__buf, size_t __size, size_t __buflen)
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__THROW __wur;
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extern char *__REDIRECT_NTH (__getcwd_alias,
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(char *__buf, size_t __size), getcwd) __wur;
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extern char *__REDIRECT_NTH (__getcwd_chk_warn,
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(char *__buf, size_t __size, size_t __buflen),
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__getcwd_chk)
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__wur __warnattr ("getcwd caller with bigger length than size of "
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"destination buffer");
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__fortify_function __wur char *
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__NTH (getcwd (char *__buf, size_t __size))
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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 (__size))
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return __getcwd_chk (__buf, __size, __bos (__buf));
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if (__size > __bos (__buf))
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return __getcwd_chk_warn (__buf, __size, __bos (__buf));
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}
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return __getcwd_alias (__buf, __size);
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}
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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);
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}
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extern int __getgroups_chk (int __size, __gid_t __list[], size_t __listlen)
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__THROW __wur;
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extern int __REDIRECT_NTH (__getgroups_alias, (int __size, __gid_t __list[]),
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getgroups) __wur;
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extern int __REDIRECT_NTH (__getgroups_chk_warn,
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(int __size, __gid_t __list[], size_t __listlen),
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__getgroups_chk)
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__wur __warnattr ("getgroups called with bigger group count than what "
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"can fit into destination buffer");
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__fortify_function int
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__NTH (getgroups (int __size, __gid_t __list[]))
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{
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if (__bos (__list) != (size_t) -1)
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{
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if (!__builtin_constant_p (__size) || __size < 0)
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return __getgroups_chk (__size, __list, __bos (__list));
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if (__size * sizeof (__gid_t) > __bos (__list))
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return __getgroups_chk_warn (__size, __list, __bos (__list));
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}
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return __getgroups_alias (__size, __list);
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}
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extern int __ttyname_r_chk (int __fd, char *__buf, size_t __buflen,
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size_t __nreal) __THROW __nonnull ((2));
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extern int __REDIRECT_NTH (__ttyname_r_alias, (int __fd, char *__buf,
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size_t __buflen), ttyname_r)
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__nonnull ((2));
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extern int __REDIRECT_NTH (__ttyname_r_chk_warn,
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(int __fd, char *__buf, size_t __buflen,
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size_t __nreal), __ttyname_r_chk)
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__nonnull ((2)) __warnattr ("ttyname_r called with bigger buflen than "
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"size of destination buffer");
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__fortify_function int
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__NTH (ttyname_r (int __fd, char *__buf, size_t __buflen))
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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 (__buflen))
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return __ttyname_r_chk (__fd, __buf, __buflen, __bos (__buf));
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if (__buflen > __bos (__buf))
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return __ttyname_r_chk_warn (__fd, __buf, __buflen, __bos (__buf));
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}
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return __ttyname_r_alias (__fd, __buf, __buflen);
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}
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#if defined __USE_REENTRANT || defined __USE_POSIX199506
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extern int __getlogin_r_chk (char *__buf, size_t __buflen, size_t __nreal)
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__nonnull ((1));
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extern int __REDIRECT (__getlogin_r_alias, (char *__buf, size_t __buflen),
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getlogin_r) __nonnull ((1));
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extern int __REDIRECT (__getlogin_r_chk_warn,
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(char *__buf, size_t __buflen, size_t __nreal),
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__getlogin_r_chk)
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__nonnull ((1)) __warnattr ("getlogin_r called with bigger buflen than "
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"size of destination buffer");
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__fortify_function int
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getlogin_r (char *__buf, size_t __buflen)
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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 (__buflen))
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return __getlogin_r_chk (__buf, __buflen, __bos (__buf));
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if (__buflen > __bos (__buf))
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return __getlogin_r_chk_warn (__buf, __buflen, __bos (__buf));
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}
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return __getlogin_r_alias (__buf, __buflen);
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}
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#endif
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#if defined __USE_MISC || defined __USE_UNIX98
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extern int __gethostname_chk (char *__buf, size_t __buflen, size_t __nreal)
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__THROW __nonnull ((1));
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extern int __REDIRECT_NTH (__gethostname_alias, (char *__buf, size_t __buflen),
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gethostname) __nonnull ((1));
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extern int __REDIRECT_NTH (__gethostname_chk_warn,
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(char *__buf, size_t __buflen, size_t __nreal),
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__gethostname_chk)
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__nonnull ((1)) __warnattr ("gethostname called with bigger buflen than "
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"size of destination buffer");
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__fortify_function int
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__NTH (gethostname (char *__buf, size_t __buflen))
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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 (__buflen))
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return __gethostname_chk (__buf, __buflen, __bos (__buf));
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if (__buflen > __bos (__buf))
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return __gethostname_chk_warn (__buf, __buflen, __bos (__buf));
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}
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return __gethostname_alias (__buf, __buflen);
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}
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#endif
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#if defined __USE_MISC || (defined __USE_XOPEN && !defined __USE_UNIX98)
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extern int __getdomainname_chk (char *__buf, size_t __buflen, size_t __nreal)
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__THROW __nonnull ((1)) __wur;
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extern int __REDIRECT_NTH (__getdomainname_alias, (char *__buf,
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size_t __buflen),
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getdomainname) __nonnull ((1)) __wur;
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extern int __REDIRECT_NTH (__getdomainname_chk_warn,
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(char *__buf, size_t __buflen, size_t __nreal),
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__getdomainname_chk)
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__nonnull ((1)) __wur __warnattr ("getdomainname called with bigger "
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"buflen than size of destination "
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"buffer");
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__fortify_function int
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__NTH (getdomainname (char *__buf, size_t __buflen))
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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 (__buflen))
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return __getdomainname_chk (__buf, __buflen, __bos (__buf));
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if (__buflen > __bos (__buf))
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return __getdomainname_chk_warn (__buf, __buflen, __bos (__buf));
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}
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return __getdomainname_alias (__buf, __buflen);
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}
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#endif
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