contrib/mdocml/compat_strlcpy.c

0 #include "config.h"
3 #if HAVE_STRLCPY
5 int dummy;
7 #else
9 /*	$OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $	*/
12  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
14  * Permission to use, copy, modify, and distribute this software for any
15  * purpose with or without fee is hereby granted, provided that the above
16  * copyright notice and this permission notice appear in all copies.
18  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
19  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
20  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
21  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
22  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
23  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
24  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
27 #include <sys/types.h>
28 #include <string.h>
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.
35 size_t
36 strlcpy(char *dst, const char *src, size_t siz)
38 	char *d = dst;
39 	const char *s = src;
40 	size_t n = siz;
42 	/* Copy as many bytes as will fit */
43 	if (n != 0) {
44 		while (--n != 0) {
45 			if ((*d++ = *s++) == '\0')
46 				break;
50 	/* Not enough room in dst, add NUL and traverse rest of src */
51 	if (n == 0) {
52 		if (siz != 0)
53 			*d = '\0';		/* NUL-terminate dst */
54 		while (*s++)
58 	return(s - src - 1);	/* count does not include NUL */
61 #endif