1 babf5d5a 2021-05-11 martijn /*	$OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $	*/
 2 babf5d5a 2021-05-11 martijn 
 3 babf5d5a 2021-05-11 martijn /*
 4 babf5d5a 2021-05-11 martijn  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
 5 babf5d5a 2021-05-11 martijn  *
 6 babf5d5a 2021-05-11 martijn  * Permission to use, copy, modify, and distribute this software for any
 7 babf5d5a 2021-05-11 martijn  * purpose with or without fee is hereby granted, provided that the above
 8 babf5d5a 2021-05-11 martijn  * copyright notice and this permission notice appear in all copies.
 9 babf5d5a 2021-05-11 martijn  *
10 babf5d5a 2021-05-11 martijn  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 babf5d5a 2021-05-11 martijn  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 babf5d5a 2021-05-11 martijn  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 babf5d5a 2021-05-11 martijn  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 babf5d5a 2021-05-11 martijn  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 babf5d5a 2021-05-11 martijn  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 babf5d5a 2021-05-11 martijn  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 babf5d5a 2021-05-11 martijn  */
18 babf5d5a 2021-05-11 martijn 
19 babf5d5a 2021-05-11 martijn /* OPENBSD ORIGINAL: lib/libc/string/strlcpy.c */
20 babf5d5a 2021-05-11 martijn 
21 babf5d5a 2021-05-11 martijn #include "openbsd-compat.h"
22 babf5d5a 2021-05-11 martijn 
23 babf5d5a 2021-05-11 martijn #include <sys/types.h>
24 babf5d5a 2021-05-11 martijn #include <string.h>
25 babf5d5a 2021-05-11 martijn 
26 babf5d5a 2021-05-11 martijn /*
27 babf5d5a 2021-05-11 martijn  * Copy src to string dst of size siz.  At most siz-1 characters
28 babf5d5a 2021-05-11 martijn  * will be copied.  Always NUL terminates (unless siz == 0).
29 babf5d5a 2021-05-11 martijn  * Returns strlen(src); if retval >= siz, truncation occurred.
30 babf5d5a 2021-05-11 martijn  */
31 babf5d5a 2021-05-11 martijn size_t
32 babf5d5a 2021-05-11 martijn strlcpy(char *dst, const char *src, size_t siz)
33 babf5d5a 2021-05-11 martijn {
34 babf5d5a 2021-05-11 martijn 	char *d = dst;
35 babf5d5a 2021-05-11 martijn 	const char *s = src;
36 babf5d5a 2021-05-11 martijn 	size_t n = siz;
37 babf5d5a 2021-05-11 martijn 
38 babf5d5a 2021-05-11 martijn 	/* Copy as many bytes as will fit */
39 babf5d5a 2021-05-11 martijn 	if (n != 0) {
40 babf5d5a 2021-05-11 martijn 		while (--n != 0) {
41 babf5d5a 2021-05-11 martijn 			if ((*d++ = *s++) == '\0')
42 babf5d5a 2021-05-11 martijn 				break;
43 babf5d5a 2021-05-11 martijn 		}
44 babf5d5a 2021-05-11 martijn 	}
45 babf5d5a 2021-05-11 martijn 
46 babf5d5a 2021-05-11 martijn 	/* Not enough room in dst, add NUL and traverse rest of src */
47 babf5d5a 2021-05-11 martijn 	if (n == 0) {
48 babf5d5a 2021-05-11 martijn 		if (siz != 0)
49 babf5d5a 2021-05-11 martijn 			*d = '\0';		/* NUL-terminate dst */
50 babf5d5a 2021-05-11 martijn 		while (*s++)
51 babf5d5a 2021-05-11 martijn 			;
52 babf5d5a 2021-05-11 martijn 	}
53 babf5d5a 2021-05-11 martijn 
54 babf5d5a 2021-05-11 martijn 	return(s - src - 1);	/* count does not include NUL */
55 babf5d5a 2021-05-11 martijn }