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glibc/posix/bits/unistd.h
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/* Checking macros for unistd functions. | |
Copyright (C) 2005 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, write to the Free | |
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
02111-1307 USA. */ | |
#ifndef _UNISTD_H | |
# error "Never include <bits/unistd.h> directly; use <unistd.h> instead." | |
#endif | |
extern ssize_t __read_chk (int __fd, void *__buf, size_t __nbytes, | |
size_t __buflen) __wur; | |
extern ssize_t __REDIRECT (__read_alias, (int __fd, void *__buf, | |
size_t __nbytes), read) __wur; | |
extern __always_inline __wur ssize_t | |
read (int __fd, void *__buf, size_t __nbytes) | |
{ | |
if (__bos0 (__buf) != (size_t) -1 | |
&& (!__builtin_constant_p (__nbytes) || __nbytes > __bos0 (__buf))) | |
return __read_chk (__fd, __buf, __nbytes, __bos0 (__buf)); | |
return __read_alias (__fd, __buf, __nbytes); | |
} | |
#ifdef __USE_UNIX98 | |
extern ssize_t __pread_chk (int __fd, void *__buf, size_t __nbytes, | |
__off_t __offset, size_t __bufsize) __wur; | |
extern ssize_t __pread64_chk (int __fd, void *__buf, size_t __nbytes, | |
__off64_t __offset, size_t __bufsize) __wur; | |
extern ssize_t __REDIRECT (__pread_alias, | |
(int __fd, void *__buf, size_t __nbytes, | |
__off_t __offset), pread) __wur; | |
extern ssize_t __REDIRECT (__pread64_alias, | |
(int __fd, void *__buf, size_t __nbytes, | |
__off64_t __offset), pread64) __wur; | |
# ifndef __USE_FILE_OFFSET64 | |
extern __always_inline __wur ssize_t | |
pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset) | |
{ | |
if (__bos0 (__buf) != (size_t) -1 | |
&& (!__builtin_constant_p (__nbytes) || __nbytes > __bos0 (__buf))) | |
return __pread_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf)); | |
return __pread_alias (__fd, __buf, __nbytes, __offset); | |
} | |
# else | |
extern __always_inline __wur ssize_t | |
pread (int __fd, void *__buf, size_t __nbytes, __off64_t __offset) | |
{ | |
if (__bos0 (__buf) != (size_t) -1 | |
&& (!__builtin_constant_p (__nbytes) || __nbytes > __bos0 (__buf))) | |
return __pread64_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf)); | |
return __pread64_alias (__fd, __buf, __nbytes, __offset); | |
} | |
# endif | |
# ifdef __USE_LARGEFILE64 | |
extern __always_inline __wur ssize_t | |
pread64 (int __fd, void *__buf, size_t __nbytes, __off64_t __offset) | |
{ | |
if (__bos0 (__buf) != (size_t) -1 | |
&& (!__builtin_constant_p (__nbytes) || __nbytes > __bos0 (__buf))) | |
return __pread64_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf)); | |
return __pread64_alias (__fd, __buf, __nbytes, __offset); | |
} | |
# endif | |
#endif | |
#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K | |
extern int __readlink_chk (__const char *__restrict __path, | |
char *__restrict __buf, size_t __len, | |
size_t __buflen) | |
__THROW __nonnull ((1, 2)) __wur; | |
extern int __REDIRECT_NTH (__readlink_alias, | |
(__const char *__restrict __path, | |
char *__restrict __buf, size_t __len), readlink) | |
__nonnull ((1, 2)) __wur; | |
extern __always_inline __nonnull ((1, 2)) __wur int | |
__NTH (readlink (__const char *__restrict __path, char *__restrict __buf, | |
size_t __len)) | |
{ | |
if (__bos (__buf) != (size_t) -1 | |
&& (!__builtin_constant_p (__len) || __len > __bos (__buf))) | |
return __readlink_chk (__path, __buf, __len, __bos (__buf)); | |
return __readlink_alias (__path, __buf, __len); | |
} | |
#endif | |
extern char *__getcwd_chk (char *__buf, size_t __size, size_t __buflen) | |
__THROW __wur; | |
extern char *__REDIRECT_NTH (__getcwd_alias, | |
(char *__buf, size_t __size), getcwd) __wur; | |
extern __always_inline __wur char * | |
__NTH (getcwd (char *__buf, size_t __size)) | |
{ | |
if (__bos (__buf) != (size_t) -1 | |
&& (!__builtin_constant_p (__size) || __size > __bos (__buf))) | |
return __getcwd_chk (__buf, __size, __bos (__buf)); | |
return __getcwd_alias (__buf, __size); | |
} | |
#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED | |
extern char *__getwd_chk (char *__buf, size_t buflen) | |
__THROW __nonnull ((1)) __wur; | |
extern char *__REDIRECT_NTH (__getwd_alias, (char *__buf), getwd) | |
__nonnull ((1)) __wur; | |
extern __always_inline __nonnull ((1)) __attribute_deprecated__ __wur char * | |
__NTH (getwd (char *__buf)) | |
{ | |
if (__bos (__buf) != (size_t) -1) | |
return __getwd_chk (__buf, __bos (__buf)); | |
return __getwd_alias (__buf); | |
} | |
#endif |