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