1/*	$NetBSD: strlcpy.c,v 1.4 2005/05/16 06:58:06 lukem Exp $	*/
2/*	from	NetBSD: strlcpy.c,v 1.14 2003/10/27 00:12:42 lukem Exp	*/
3/*	from OpenBSD: strlcpy.c,v 1.7 2003/04/12 21:56:39 millert Exp	*/
4
5/*
6 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
7 *
8 * Permission to use, copy, modify, and distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS" AND TODD C. MILLER DISCLAIMS ALL
13 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
14 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER BE LIABLE
15 * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
17 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
18 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 */
20
21#include "tnftp.h"
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 */
28size_t
29strlcpy(char *dst, const char *src, size_t siz)
30{
31	char *d = dst;
32	const char *s = src;
33	size_t n = siz;
34
35	/* Copy as many bytes as will fit */
36	if (n != 0 && --n != 0) {
37		do {
38			if ((*d++ = *s++) == 0)
39				break;
40		} while (--n != 0);
41	}
42
43	/* Not enough room in dst, add NUL and traverse rest of src */
44	if (n == 0) {
45		if (siz != 0)
46			*d = '\0';		/* NUL-terminate dst */
47		while (*s++)
48			;
49	}
50
51	return(s - src - 1);	/* count does not include NUL */
52}
53