1*38d40fc9Slukem /* $NetBSD: sprintf_chk.c,v 1.6 2009/02/05 05:40:36 lukem Exp $ */
22368dc66Stls
32368dc66Stls /*-
42368dc66Stls * Copyright (c) 2006 The NetBSD Foundation, Inc.
52368dc66Stls * All rights reserved.
62368dc66Stls *
72368dc66Stls * This code is derived from software contributed to The NetBSD Foundation
82368dc66Stls * by Christos Zoulas.
92368dc66Stls *
102368dc66Stls * Redistribution and use in source and binary forms, with or without
112368dc66Stls * modification, are permitted provided that the following conditions
122368dc66Stls * are met:
132368dc66Stls * 1. Redistributions of source code must retain the above copyright
142368dc66Stls * notice, this list of conditions and the following disclaimer.
152368dc66Stls * 2. Redistributions in binary form must reproduce the above copyright
162368dc66Stls * notice, this list of conditions and the following disclaimer in the
172368dc66Stls * documentation and/or other materials provided with the distribution.
182368dc66Stls *
192368dc66Stls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
202368dc66Stls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
212368dc66Stls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
222368dc66Stls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
232368dc66Stls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
242368dc66Stls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
252368dc66Stls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
262368dc66Stls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
272368dc66Stls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
282368dc66Stls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
292368dc66Stls * POSSIBILITY OF SUCH DAMAGE.
302368dc66Stls */
312368dc66Stls #include <sys/cdefs.h>
32*38d40fc9Slukem __RCSID("$NetBSD: sprintf_chk.c,v 1.6 2009/02/05 05:40:36 lukem Exp $");
332368dc66Stls
342368dc66Stls /*LINTLIBRARY*/
352368dc66Stls
36dc99372bStls #include <ssp/ssp.h>
372368dc66Stls #include <stdio.h>
382368dc66Stls #include <limits.h>
392368dc66Stls #include <stdarg.h>
40d0d36b61Skristerw #include <ssp/stdio.h>
412368dc66Stls
42d9b4f5bbSchristos #undef vsnprintf
43d9b4f5bbSchristos #undef vsprintf
44d9b4f5bbSchristos
452368dc66Stls int
462368dc66Stls /*ARGSUSED*/
__sprintf_chk(char * __restrict buf,int flags,size_t slen,const char * __restrict fmt,...)472368dc66Stls __sprintf_chk(char * __restrict buf, int flags, size_t slen,
482368dc66Stls const char * __restrict fmt, ...)
492368dc66Stls {
502368dc66Stls va_list ap;
512368dc66Stls int rv;
522368dc66Stls
532368dc66Stls va_start(ap, fmt);
542368dc66Stls if (slen > (size_t)INT_MAX)
552368dc66Stls rv = vsprintf(buf, fmt, ap);
562368dc66Stls else {
57*38d40fc9Slukem if ((rv = vsnprintf(buf, slen, fmt, ap)) >= 0 && (size_t)rv >= slen)
582368dc66Stls __chk_fail();
592368dc66Stls }
602368dc66Stls va_end(ap);
612368dc66Stls
622368dc66Stls return rv;
632368dc66Stls }
64