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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

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