1/*
2 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
17 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
18 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
19 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * dollar OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp dollar
28 */
29
30/*
31 * Copy src to string dst of size siz.  At most siz-1 characters
32 * will be copied.  Always NUL terminates (unless siz == 0).
33 * Returns strlen(src); if retval >= siz, truncation occurred.
34 */
35static size_t
36strlcpy(dst, src, siz)
37	char *dst;
38	const char *src;
39	size_t siz;
40{
41	char *d = dst;
42	const char *s = src;
43	size_t n = siz;
44
45	/* Copy as many bytes as will fit */
46	if (n != 0 && --n != 0) {
47		do {
48			if ((*d++ = *s++) == 0)
49				break;
50		} while (--n != 0);
51	}
52
53	/* Not enough room in dst, add NUL and traverse rest of src */
54	if (n == 0) {
55		if (siz != 0)
56			*d = '\0';		/* NUL-terminate dst */
57		while (*s++)
58			;
59	}
60
61	return(s - src - 1);	/* count does not include NUL */
62}
63