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/* Checking macros for unistd functions.
Copyright (C) 2005, 2006, 2007, 2008, 2012 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, see
<http://www.gnu.org/licenses/>. */
#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 ssize_t __REDIRECT (__read_chk_warn,
(int __fd, void *__buf, size_t __nbytes,
size_t __buflen), __read_chk)
__wur __warnattr ("read called with bigger length than size of "
"the destination buffer");
__fortify_function __wur ssize_t
read (int __fd, void *__buf, size_t __nbytes)
{
if (__bos0 (__buf) != (size_t) -1)
{
if (!__builtin_constant_p (__nbytes))
return __read_chk (__fd, __buf, __nbytes, __bos0 (__buf));
if (__nbytes > __bos0 (__buf))
return __read_chk_warn (__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;
extern ssize_t __REDIRECT (__pread_chk_warn,
(int __fd, void *__buf, size_t __nbytes,
__off_t __offset, size_t __bufsize), __pread_chk)
__wur __warnattr ("pread called with bigger length than size of "
"the destination buffer");
extern ssize_t __REDIRECT (__pread64_chk_warn,
(int __fd, void *__buf, size_t __nbytes,
__off64_t __offset, size_t __bufsize),
__pread64_chk)
__wur __warnattr ("pread64 called with bigger length than size of "
"the destination buffer");
# ifndef __USE_FILE_OFFSET64
__fortify_function __wur ssize_t
pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset)
{
if (__bos0 (__buf) != (size_t) -1)
{
if (!__builtin_constant_p (__nbytes))
return __pread_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf));
if ( __nbytes > __bos0 (__buf))
return __pread_chk_warn (__fd, __buf, __nbytes, __offset,
__bos0 (__buf));
}
return __pread_alias (__fd, __buf, __nbytes, __offset);
}
# else
__fortify_function __wur ssize_t
pread (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
{
if (__bos0 (__buf) != (size_t) -1)
{
if (!__builtin_constant_p (__nbytes))
return __pread64_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf));
if ( __nbytes > __bos0 (__buf))
return __pread64_chk_warn (__fd, __buf, __nbytes, __offset,
__bos0 (__buf));
}
return __pread64_alias (__fd, __buf, __nbytes, __offset);
}
# endif
# ifdef __USE_LARGEFILE64
__fortify_function __wur ssize_t
pread64 (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
{
if (__bos0 (__buf) != (size_t) -1)
{
if (!__builtin_constant_p (__nbytes))
return __pread64_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf));
if ( __nbytes > __bos0 (__buf))
return __pread64_chk_warn (__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 ssize_t __readlink_chk (const char *__restrict __path,
char *__restrict __buf, size_t __len,
size_t __buflen)
__THROW __nonnull ((1, 2)) __wur;
extern ssize_t __REDIRECT_NTH (__readlink_alias,
(const char *__restrict __path,
char *__restrict __buf, size_t __len), readlink)
__nonnull ((1, 2)) __wur;
extern ssize_t __REDIRECT_NTH (__readlink_chk_warn,
(const char *__restrict __path,
char *__restrict __buf, size_t __len,
size_t __buflen), __readlink_chk)
__nonnull ((1, 2)) __wur __warnattr ("readlink called with bigger length "
"than size of destination buffer");
__fortify_function __nonnull ((1, 2)) __wur ssize_t
__NTH (readlink (const char *__restrict __path, char *__restrict __buf,
size_t __len))
{
if (__bos (__buf) != (size_t) -1)
{
if (!__builtin_constant_p (__len))
return __readlink_chk (__path, __buf, __len, __bos (__buf));
if ( __len > __bos (__buf))
return __readlink_chk_warn (__path, __buf, __len, __bos (__buf));
}
return __readlink_alias (__path, __buf, __len);
}
#endif
#ifdef __USE_ATFILE
extern ssize_t __readlinkat_chk (int __fd, const char *__restrict __path,
char *__restrict __buf, size_t __len,
size_t __buflen)
__THROW __nonnull ((2, 3)) __wur;
extern ssize_t __REDIRECT_NTH (__readlinkat_alias,
(int __fd, const char *__restrict __path,
char *__restrict __buf, size_t __len),
readlinkat)
__nonnull ((2, 3)) __wur;
extern ssize_t __REDIRECT_NTH (__readlinkat_chk_warn,
(int __fd, const char *__restrict __path,
char *__restrict __buf, size_t __len,
size_t __buflen), __readlinkat_chk)
__nonnull ((2, 3)) __wur __warnattr ("readlinkat called with bigger "
"length than size of destination "
"buffer");
__fortify_function __nonnull ((2, 3)) __wur ssize_t
__NTH (readlinkat (int __fd, const char *__restrict __path,
char *__restrict __buf, size_t __len))
{
if (__bos (__buf) != (size_t) -1)
{
if (!__builtin_constant_p (__len))
return __readlinkat_chk (__fd, __path, __buf, __len, __bos (__buf));
if (__len > __bos (__buf))
return __readlinkat_chk_warn (__fd, __path, __buf, __len,
__bos (__buf));
}
return __readlinkat_alias (__fd, __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 char *__REDIRECT_NTH (__getcwd_chk_warn,
(char *__buf, size_t __size, size_t __buflen),
__getcwd_chk)
__wur __warnattr ("getcwd caller with bigger length than size of "
"destination buffer");
__fortify_function __wur char *
__NTH (getcwd (char *__buf, size_t __size))
{
if (__bos (__buf) != (size_t) -1)
{
if (!__builtin_constant_p (__size))
return __getcwd_chk (__buf, __size, __bos (__buf));
if (__size > __bos (__buf))
return __getcwd_chk_warn (__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_warn, (char *__buf), getwd)
__nonnull ((1)) __wur __warnattr ("please use getcwd instead, as getwd "
"doesn't specify buffer size");
__fortify_function __nonnull ((1)) __attribute_deprecated__ __wur char *
__NTH (getwd (char *__buf))
{
if (__bos (__buf) != (size_t) -1)
return __getwd_chk (__buf, __bos (__buf));
return __getwd_warn (__buf);
}
#endif
extern size_t __confstr_chk (int __name, char *__buf, size_t __len,
size_t __buflen) __THROW;
extern size_t __REDIRECT_NTH (__confstr_alias, (int __name, char *__buf,
size_t __len), confstr);
extern size_t __REDIRECT_NTH (__confstr_chk_warn,
(int __name, char *__buf, size_t __len,
size_t __buflen), __confstr_chk)
__warnattr ("confstr called with bigger length than size of destination "
"buffer");
__fortify_function size_t
__NTH (confstr (int __name, char *__buf, size_t __len))
{
if (__bos (__buf) != (size_t) -1)
{
if (!__builtin_constant_p (__len))
return __confstr_chk (__name, __buf, __len, __bos (__buf));
if (__bos (__buf) < __len)
return __confstr_chk_warn (__name, __buf, __len, __bos (__buf));
}
return __confstr_alias (__name, __buf, __len);
}
extern int __getgroups_chk (int __size, __gid_t __list[], size_t __listlen)
__THROW __wur;
extern int __REDIRECT_NTH (__getgroups_alias, (int __size, __gid_t __list[]),
getgroups) __wur;
extern int __REDIRECT_NTH (__getgroups_chk_warn,
(int __size, __gid_t __list[], size_t __listlen),
__getgroups_chk)
__wur __warnattr ("getgroups called with bigger group count than what "
"can fit into destination buffer");
__fortify_function int
__NTH (getgroups (int __size, __gid_t __list[]))
{
if (__bos (__list) != (size_t) -1)
{
if (!__builtin_constant_p (__size) || __size < 0)
return __getgroups_chk (__size, __list, __bos (__list));
if (__size * sizeof (__gid_t) > __bos (__list))
return __getgroups_chk_warn (__size, __list, __bos (__list));
}
return __getgroups_alias (__size, __list);
}
extern int __ttyname_r_chk (int __fd, char *__buf, size_t __buflen,
size_t __nreal) __THROW __nonnull ((2));
extern int __REDIRECT_NTH (__ttyname_r_alias, (int __fd, char *__buf,
size_t __buflen), ttyname_r)
__nonnull ((2));
extern int __REDIRECT_NTH (__ttyname_r_chk_warn,
(int __fd, char *__buf, size_t __buflen,
size_t __nreal), __ttyname_r_chk)
__nonnull ((2)) __warnattr ("ttyname_r called with bigger buflen than "
"size of destination buffer");
__fortify_function int
__NTH (ttyname_r (int __fd, char *__buf, size_t __buflen))
{
if (__bos (__buf) != (size_t) -1)
{
if (!__builtin_constant_p (__buflen))
return __ttyname_r_chk (__fd, __buf, __buflen, __bos (__buf));
if (__buflen > __bos (__buf))
return __ttyname_r_chk_warn (__fd, __buf, __buflen, __bos (__buf));
}
return __ttyname_r_alias (__fd, __buf, __buflen);
}
#if defined __USE_REENTRANT || defined __USE_POSIX199506
extern int __getlogin_r_chk (char *__buf, size_t __buflen, size_t __nreal)
__nonnull ((1));
extern int __REDIRECT (__getlogin_r_alias, (char *__buf, size_t __buflen),
getlogin_r) __nonnull ((1));
extern int __REDIRECT (__getlogin_r_chk_warn,
(char *__buf, size_t __buflen, size_t __nreal),
__getlogin_r_chk)
__nonnull ((1)) __warnattr ("getlogin_r called with bigger buflen than "
"size of destination buffer");
__fortify_function int
getlogin_r (char *__buf, size_t __buflen)
{
if (__bos (__buf) != (size_t) -1)
{
if (!__builtin_constant_p (__buflen))
return __getlogin_r_chk (__buf, __buflen, __bos (__buf));
if (__buflen > __bos (__buf))
return __getlogin_r_chk_warn (__buf, __buflen, __bos (__buf));
}
return __getlogin_r_alias (__buf, __buflen);
}
#endif
#if defined __USE_BSD || defined __USE_UNIX98
extern int __gethostname_chk (char *__buf, size_t __buflen, size_t __nreal)
__THROW __nonnull ((1));
extern int __REDIRECT_NTH (__gethostname_alias, (char *__buf, size_t __buflen),
gethostname) __nonnull ((1));
extern int __REDIRECT_NTH (__gethostname_chk_warn,
(char *__buf, size_t __buflen, size_t __nreal),
__gethostname_chk)
__nonnull ((1)) __warnattr ("gethostname called with bigger buflen than "
"size of destination buffer");
__fortify_function int
__NTH (gethostname (char *__buf, size_t __buflen))
{
if (__bos (__buf) != (size_t) -1)
{
if (!__builtin_constant_p (__buflen))
return __gethostname_chk (__buf, __buflen, __bos (__buf));
if (__buflen > __bos (__buf))
return __gethostname_chk_warn (__buf, __buflen, __bos (__buf));
}
return __gethostname_alias (__buf, __buflen);
}
#endif
#if defined __USE_BSD || (defined __USE_XOPEN && !defined __USE_UNIX98)
extern int __getdomainname_chk (char *__buf, size_t __buflen, size_t __nreal)
__THROW __nonnull ((1)) __wur;
extern int __REDIRECT_NTH (__getdomainname_alias, (char *__buf,
size_t __buflen),
getdomainname) __nonnull ((1)) __wur;
extern int __REDIRECT_NTH (__getdomainname_chk_warn,
(char *__buf, size_t __buflen, size_t __nreal),
__getdomainname_chk)
__nonnull ((1)) __wur __warnattr ("getdomainname called with bigger "
"buflen than size of destination "
"buffer");
__fortify_function int
__NTH (getdomainname (char *__buf, size_t __buflen))
{
if (__bos (__buf) != (size_t) -1)
{
if (!__builtin_constant_p (__buflen))
return __getdomainname_chk (__buf, __buflen, __bos (__buf));
if (__buflen > __bos (__buf))
return __getdomainname_chk_warn (__buf, __buflen, __bos (__buf));
}
return __getdomainname_alias (__buf, __buflen);
}
#endif