1 /* $NetBSD: sprintf_chk.c,v 1.6 2009/02/05 05:40:36 lukem Exp $ */
2
3 /*-
4 * Copyright (c) 2006 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31 #include <sys/cdefs.h>
32 __RCSID("$NetBSD: sprintf_chk.c,v 1.6 2009/02/05 05:40:36 lukem Exp $");
33
34 /*LINTLIBRARY*/
35
36 #include <ssp/ssp.h>
37 #include <stdio.h>
38 #include <limits.h>
39 #include <stdarg.h>
40 #include <ssp/stdio.h>
41
42 #undef vsnprintf
43 #undef vsprintf
44
45 int
46 /*ARGSUSED*/
__sprintf_chk(char * __restrict buf,int flags,size_t slen,const char * __restrict fmt,...)47 __sprintf_chk(char * __restrict buf, int flags, size_t slen,
48 const char * __restrict fmt, ...)
49 {
50 va_list ap;
51 int rv;
52
53 (void) flags;
54 va_start(ap, fmt);
55 if (slen > (size_t)INT_MAX)
56 rv = vsprintf(buf, fmt, ap);
57 else {
58 if ((rv = vsnprintf(buf, slen, fmt, ap)) >= 0 && (size_t)rv >= slen)
59 __chk_fail();
60 }
61 va_end(ap);
62
63 return rv;
64 }
65
