1/* Checking macros for stdio functions. 2 Copyright (C) 2004, 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_STDIO_H 37#define _SSP_STDIO_H 1 38 39#include <ssp.h> 40#include_next <stdio.h> 41 42#if __SSP_FORTIFY_LEVEL > 0 43 44#include <stdarg.h> 45 46#undef sprintf 47#undef vsprintf 48#undef snprintf 49#undef vsnprintf 50#undef gets 51#undef fgets 52 53extern int __sprintf_chk (char *__restrict__ __s, int __flag, size_t __slen, 54 __const char *__restrict__ __format, ...); 55extern int __vsprintf_chk (char *__restrict__ __s, int __flag, size_t __slen, 56 __const char *__restrict__ __format, 57 va_list __ap); 58 59#define sprintf(str, ...) \ 60 __builtin___sprintf_chk (str, 0, __ssp_bos (str), \ 61 __VA_ARGS__) 62#define vsprintf(str, fmt, ap) \ 63 __builtin___vsprintf_chk (str, 0, __ssp_bos (str), fmt, ap) 64 65extern int __snprintf_chk (char *__restrict__ __s, size_t __n, int __flag, 66 size_t __slen, __const char *__restrict__ __format, 67 ...); 68extern int __vsnprintf_chk (char *__restrict__ __s, size_t __n, int __flag, 69 size_t __slen, __const char *__restrict__ __format, 70 va_list __ap); 71 72#define snprintf(str, len, ...) \ 73 __builtin___snprintf_chk (str, len, 0, __ssp_bos (str), __VA_ARGS__) 74#define vsnprintf(str, len, fmt, ap) \ 75 __builtin___vsnprintf_chk (str, len, 0, __ssp_bos (str), fmt, ap) 76 77extern char *__gets_chk (char *__str, size_t); 78extern char *__SSP_REDIRECT (__gets_alias, (char *__str), gets); 79 80extern inline __attribute__((__always_inline__)) char * 81gets (char *__str) 82{ 83 if (__ssp_bos (__str) != (size_t) -1) 84 return __gets_chk (__str, __ssp_bos (__str)); 85 return __gets_alias (__str); 86} 87 88extern char *__SSP_REDIRECT (__fgets_alias, 89 (char *__restrict__ __s, int __n, 90 FILE *__restrict__ __stream), fgets); 91 92extern inline __attribute__((__always_inline__)) char * 93fgets (char *__restrict__ __s, int __n, FILE *__restrict__ __stream) 94{ 95 if (__ssp_bos (__s) != (size_t) -1 && (size_t) __n > __ssp_bos (__s)) 96 __chk_fail (); 97 return __fgets_alias (__s, __n, __stream); 98} 99 100#endif /* __SSP_FORTIFY_LEVEL > 0 */ 101#endif /* _SSP_STDIO_H */ 102