1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <stdio.h> 30#include <stdarg.h> 31 32/* 33 * Runtime implementation of __builtin____snprintf_chk. 34 * 35 * See 36 * http://gcc.gnu.org/onlinedocs/gcc/Object-Size-Checking.html 37 * http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html 38 * for details. 39 * 40 * This snprintf check is called if _FORTIFY_SOURCE is defined and 41 * greater than 0. 42 */ 43int __snprintf_chk( 44 char *dest, 45 size_t supplied_size, 46 int flags, 47 size_t dest_len_from_compiler, 48 const char *format, ...) 49{ 50 va_list va; 51 int retval; 52 53 va_start(va, format); 54 retval = __vsnprintf_chk(dest, supplied_size, flags, 55 dest_len_from_compiler, format, va); 56 va_end(va); 57 58 return retval; 59} 60