1/*-
2 * Copyright (c) 2006, 2008, 2009, 2013
3 *	Thorsten Glaser <tg@mirbsd.org>
4 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include "sh.h"
20
21__RCSID("$MirOS: src/bin/mksh/strlcpy.c,v 1.8 2013/11/05 22:10:15 tg Exp $");
22
23/*
24 * Copy src to string dst of size siz. At most siz-1 characters
25 * will be copied. Always NUL terminates (unless siz == 0).
26 * Returns strlen(src); if retval >= siz, truncation occurred.
27 */
28#undef strlcpy
29size_t
30strlcpy(char *dst, const char *src, size_t siz)
31{
32	const char *s = src;
33
34	if (siz == 0)
35		goto traverse_src;
36
37	/* copy as many chars as will fit */
38	while (--siz && (*dst++ = *s++))
39		;
40
41	/* not enough room in dst */
42	if (siz == 0) {
43		/* safe to NUL-terminate dst since we copied <= siz-1 chars */
44		*dst = '\0';
45 traverse_src:
46		/* traverse rest of src */
47		while (*s++)
48			;
49	}
50
51	/* count does not include NUL */
52	return ((size_t)(s - src - 1));
53}
54