libc/ssp/strcat_chk.c

1.2.8.2  wrstuden /*	$NetBSD: strcat_chk.c,v 1.2.8.2 2007/09/03 07:01:23 wrstuden Exp $	*/
1.2.8.2  wrstuden
1.2.8.2  wrstuden /*-
1.2.8.2  wrstuden  * Copyright (c) 2006 The NetBSD Foundation, Inc.
1.2.8.2  wrstuden  * All rights reserved.
1.2.8.2  wrstuden  *
1.2.8.2  wrstuden  * This code is derived from software contributed to The NetBSD Foundation
1.2.8.2  wrstuden  * by Christos Zoulas.
1.2.8.2  wrstuden  *
1.2.8.2  wrstuden  * Redistribution and use in source and binary forms, with or without
1.2.8.2  wrstuden  * modification, are permitted provided that the following conditions
1.2.8.2  wrstuden  * are met:
1.2.8.2  wrstuden  * 1. Redistributions of source code must retain the above copyright
1.2.8.2  wrstuden  *    notice, this list of conditions and the following disclaimer.
1.2.8.2  wrstuden  * 2. Redistributions in binary form must reproduce the above copyright
1.2.8.2  wrstuden  *    notice, this list of conditions and the following disclaimer in the
1.2.8.2  wrstuden  *    documentation and/or other materials provided with the distribution.
1.2.8.2  wrstuden  * 3. All advertising materials mentioning features or use of this software
1.2.8.2  wrstuden  *    must display the following acknowledgement:
1.2.8.2  wrstuden  *        This product includes software developed by the NetBSD
1.2.8.2  wrstuden  *        Foundation, Inc. and its contributors.
1.2.8.2  wrstuden  * 4. Neither the name of The NetBSD Foundation nor the names of its
1.2.8.2  wrstuden  *    contributors may be used to endorse or promote products derived
1.2.8.2  wrstuden  *    from this software without specific prior written permission.
1.2.8.2  wrstuden  *
1.2.8.2  wrstuden  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
1.2.8.2  wrstuden  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
1.2.8.2  wrstuden  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.2.8.2  wrstuden  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
1.2.8.2  wrstuden  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.2.8.2  wrstuden  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.2.8.2  wrstuden  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1.2.8.2  wrstuden  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1.2.8.2  wrstuden  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.2.8.2  wrstuden  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1.2.8.2  wrstuden  * POSSIBILITY OF SUCH DAMAGE.
1.2.8.2  wrstuden  */
1.2.8.2  wrstuden #include <sys/cdefs.h>
1.2.8.2  wrstuden __RCSID("$NetBSD: strcat_chk.c,v 1.2.8.2 2007/09/03 07:01:23 wrstuden Exp $");
1.2.8.2  wrstuden
1.2.8.2  wrstuden /*LINTLIBRARY*/
1.2.8.2  wrstuden
1.2.8.2  wrstuden #include <ssp/ssp.h>
1.2.8.2  wrstuden #include <string.h>
1.2.8.2  wrstuden
1.2.8.2  wrstuden char *
1.2.8.2  wrstuden __strcat_chk(char * __restrict dst, char * __restrict src, size_t slen)
1.2.8.2  wrstuden {
1.2.8.2  wrstuden 	char *d;
1.2.8.2  wrstuden
1.2.8.2  wrstuden 	for (d = dst; *d; d++) {
1.2.8.2  wrstuden 		if (slen-- == 0)
1.2.8.2  wrstuden 			__chk_fail();
1.2.8.2  wrstuden 	}
1.2.8.2  wrstuden
1.2.8.2  wrstuden 	while (*src) {
1.2.8.2  wrstuden 		if (slen-- == 0)
1.2.8.2  wrstuden 			__chk_fail();
1.2.8.2  wrstuden 		*d++ = *src++;
1.2.8.2  wrstuden 	}
1.2.8.2  wrstuden
1.2.8.2  wrstuden 	if (slen-- == 0)
1.2.8.2  wrstuden 		__chk_fail();
1.2.8.2  wrstuden
1.2.8.2  wrstuden 	*d = '\0';
1.2.8.2  wrstuden 	return dst;
1.2.8.2  wrstuden }