1 /*-
2 *
3 * SPDX-License-Identifier: BSD-2-Clause
4 *
5 * Copyright (c) 2013 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Christos Zoulas.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32 #include <sys/cdefs.h>
33 __RCSID("$NetBSD: stpcpy_chk.c,v 1.6 2015/05/09 15:42:21 christos Exp $");
34
35 #include <string.h>
36
37 #include <ssp/string.h>
38 #undef memcpy
39
40 #include "ssp_internal.h"
41
42 char *
__stpcpy_chk(char * __restrict dst,const char * __restrict src,size_t slen)43 __stpcpy_chk(char * __restrict dst, const char * __restrict src, size_t slen)
44 {
45 size_t len = strlen(src);
46
47 if (len >= slen)
48 __chk_fail();
49
50 if (__ssp_overlap(src, dst, len))
51 __chk_fail();
52
53 (void)memcpy(dst, src, len + 1);
54 return (dst + len);
55 }
56