74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
/* $NetBSD: strncat_chk.c,v 1.5 2014/09/17 00:39:28 joerg Exp $ */
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/*-
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* Copyright (c) 2006 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: strncat_chk.c,v 1.5 2014/09/17 00:39:28 joerg Exp $");
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/*LINTLIBRARY*/
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#include <ssp/ssp.h>
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#include <string.h>
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#include <stdio.h>
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char *__strncat_chk(char * __restrict, const char * __restrict, size_t,
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size_t);
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char *
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__strncat_chk(char * __restrict dst, const char * __restrict src, size_t len,
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size_t slen)
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{
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char *d;
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if (len == 0)
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return dst;
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if (len > slen)
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__chk_fail();
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for (d = dst; *d; d++) {
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if (slen-- == 0)
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__chk_fail();
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}
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do {
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if ((*d = *src++) == '\0')
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break;
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if (slen-- == 0)
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__chk_fail();
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d++;
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} while (--len != 0);
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if (slen-- == 0)
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__chk_fail();
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*d = '\0';
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return dst;
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}
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