1 dd038bc6 2021-09-21 thomas.ad /* $OpenBSD: strlcpy.c,v 1.10 2005/08/08 08:05:37 espie Exp $ */
4 dd038bc6 2021-09-21 thomas.ad * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
6 dd038bc6 2021-09-21 thomas.ad * Permission to use, copy, modify, and distribute this software for any
7 dd038bc6 2021-09-21 thomas.ad * purpose with or without fee is hereby granted, provided that the above
8 dd038bc6 2021-09-21 thomas.ad * copyright notice and this permission notice appear in all copies.
10 dd038bc6 2021-09-21 thomas.ad * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 dd038bc6 2021-09-21 thomas.ad * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 dd038bc6 2021-09-21 thomas.ad * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 dd038bc6 2021-09-21 thomas.ad * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 dd038bc6 2021-09-21 thomas.ad * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 dd038bc6 2021-09-21 thomas.ad * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 dd038bc6 2021-09-21 thomas.ad * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 dd038bc6 2021-09-21 thomas.ad #include <sys/types.h>
20 dd038bc6 2021-09-21 thomas.ad #include <string.h>
23 dd038bc6 2021-09-21 thomas.ad * Copy src to string dst of size siz. At most siz-1 characters
24 dd038bc6 2021-09-21 thomas.ad * will be copied. Always NUL terminates (unless siz == 0).
25 dd038bc6 2021-09-21 thomas.ad * Returns strlen(src); if retval >= siz, truncation occurred.
28 dd038bc6 2021-09-21 thomas.ad strlcpy(char *dst, const char *src, size_t siz)
30 dd038bc6 2021-09-21 thomas.ad char *d = dst;
31 dd038bc6 2021-09-21 thomas.ad const char *s = src;
32 dd038bc6 2021-09-21 thomas.ad size_t n = siz;
34 dd038bc6 2021-09-21 thomas.ad /* Copy as many bytes as will fit */
35 dd038bc6 2021-09-21 thomas.ad if (n != 0 && --n != 0) {
37 dd038bc6 2021-09-21 thomas.ad if ((*d++ = *s++) == 0)
39 dd038bc6 2021-09-21 thomas.ad } while (--n != 0);
42 dd038bc6 2021-09-21 thomas.ad /* Not enough room in dst, add NUL and traverse rest of src */
43 dd038bc6 2021-09-21 thomas.ad if (n == 0) {
44 dd038bc6 2021-09-21 thomas.ad if (siz != 0)
45 dd038bc6 2021-09-21 thomas.ad *d = '\0'; /* NUL-terminate dst */
46 dd038bc6 2021-09-21 thomas.ad while (*s++)
50 dd038bc6 2021-09-21 thomas.ad return(s - src - 1); /* count does not include NUL */