1/* Checking macros for unistd functions. 2 Copyright (C) 2005 Free Software Foundation, Inc. 3 4This file is part of GCC. 5 6GCC is free software; you can redistribute it and/or modify it under 7the terms of the GNU General Public License as published by the Free 8Software Foundation; either version 2, or (at your option) any later 9version. 10 11In addition to the permissions in the GNU General Public License, the 12Free Software Foundation gives you unlimited permission to link the 13compiled version of this file into combinations with other programs, 14and to distribute those combinations without any restriction coming 15from the use of this file. (The General Public License restrictions 16do apply in other respects; for example, they cover modification of 17the file, and distribution when not linked into a combine 18executable.) 19 20GCC is distributed in the hope that it will be useful, but WITHOUT ANY 21WARRANTY; without even the implied warranty of MERCHANTABILITY or 22FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 23for more details. 24 25You should have received a copy of the GNU General Public License 26along with GCC; see the file COPYING. If not, write to the Free 27Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 2802110-1301, USA. */ 29 30/* As a special exception, if you link this library with files compiled with 31 GCC to produce an executable, this does not cause the resulting executable 32 to be covered by the GNU General Public License. This exception does not 33 however invalidate any other reasons why the executable file might be 34 covered by the GNU General Public License. */ 35 36#ifndef _SSP_UNISTD_H 37#define _SSP_UNISTD_H 1 38 39#include <ssp.h> 40#include_next <unistd.h> 41 42#if __SSP_FORTIFY_LEVEL > 0 43 44#undef read 45#undef readlink 46#undef getcwd 47 48extern ssize_t __SSP_REDIRECT (__read_alias, (int __fd, void *__buf, 49 size_t __nbytes), read); 50 51extern inline __attribute__((__always_inline__)) ssize_t 52read (int __fd, void *__buf, size_t __nbytes) 53{ 54 if (__ssp_bos0 (__buf) != (size_t) -1 && __nbytes > __ssp_bos0 (__buf)) 55 __chk_fail (); 56 return __read_alias (__fd, __buf, __nbytes); 57} 58 59extern int __SSP_REDIRECT (__readlink_alias, 60 (const char *__restrict__ __path, 61 char *__restrict__ __buf, size_t __len), 62 readlink); 63 64extern inline __attribute__((__always_inline__)) int 65readlink (const char *__restrict__ __path, char *__restrict__ __buf, 66 size_t __len) 67{ 68 if (__ssp_bos (__buf) != (size_t) -1 && __len > __ssp_bos (__buf)) 69 __chk_fail (); 70 return __readlink_alias (__path, __buf, __len); 71} 72 73extern char *__SSP_REDIRECT (__getcwd_alias, 74 (char *__buf, size_t __size), getcwd); 75 76extern inline __attribute__((__always_inline__)) char * 77getcwd (char *__buf, size_t __size) 78{ 79 if (__ssp_bos (__buf) != (size_t) -1 && __size > __ssp_bos (__buf)) 80 __chk_fail (); 81 return __getcwd_alias (__buf, __size); 82} 83 84#endif /* __SSP_FORTIFY_LEVEL > 0 */ 85#endif /* _SSP_UNISTD_H */ 86