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      1  1.5     joerg /*	$NetBSD: strcat_chk.c,v 1.5 2014/09/17 00:39:28 joerg Exp $	*/
      2  1.1       tls 
      3  1.1       tls /*-
      4  1.1       tls  * Copyright (c) 2006 The NetBSD Foundation, Inc.
      5  1.1       tls  * All rights reserved.
      6  1.1       tls  *
      7  1.1       tls  * This code is derived from software contributed to The NetBSD Foundation
      8  1.1       tls  * by Christos Zoulas.
      9  1.1       tls  *
     10  1.1       tls  * Redistribution and use in source and binary forms, with or without
     11  1.1       tls  * modification, are permitted provided that the following conditions
     12  1.1       tls  * are met:
     13  1.1       tls  * 1. Redistributions of source code must retain the above copyright
     14  1.1       tls  *    notice, this list of conditions and the following disclaimer.
     15  1.1       tls  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.1       tls  *    notice, this list of conditions and the following disclaimer in the
     17  1.1       tls  *    documentation and/or other materials provided with the distribution.
     18  1.1       tls  *
     19  1.1       tls  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.1       tls  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.1       tls  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.1       tls  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.1       tls  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.1       tls  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.1       tls  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.1       tls  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.1       tls  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.1       tls  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.1       tls  * POSSIBILITY OF SUCH DAMAGE.
     30  1.1       tls  */
     31  1.1       tls #include <sys/cdefs.h>
     32  1.5     joerg __RCSID("$NetBSD: strcat_chk.c,v 1.5 2014/09/17 00:39:28 joerg Exp $");
     33  1.1       tls 
     34  1.1       tls /*LINTLIBRARY*/
     35  1.1       tls 
     36  1.2       tls #include <ssp/ssp.h>
     37  1.1       tls #include <string.h>
     38  1.1       tls 
     39  1.5     joerg char *__strcat_chk(char * __restrict, const char * __restrict, size_t);
     40  1.5     joerg 
     41  1.1       tls char *
     42  1.4  drochner __strcat_chk(char * __restrict dst, const char * __restrict src, size_t slen)
     43  1.1       tls {
     44  1.1       tls 	char *d;
     45  1.1       tls 
     46  1.1       tls 	for (d = dst; *d; d++) {
     47  1.1       tls 		if (slen-- == 0)
     48  1.1       tls 			__chk_fail();
     49  1.1       tls 	}
     50  1.1       tls 
     51  1.1       tls 	while (*src) {
     52  1.1       tls 		if (slen-- == 0)
     53  1.1       tls 			__chk_fail();
     54  1.1       tls 		*d++ = *src++;
     55  1.1       tls 	}
     56  1.1       tls 
     57  1.1       tls 	if (slen-- == 0)
     58  1.1       tls 		__chk_fail();
     59  1.1       tls 
     60  1.1       tls 	*d = '\0';
     61  1.1       tls 	return dst;
     62  1.1       tls }
     63