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Damien Millerb9cd0492011-09-23 10:38:11 +10001/* $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $ */
Damien Millerd4a8b7e1999-10-27 13:42:43 +10002
3/*
4 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
Damien Millerd4a8b7e1999-10-27 13:42:43 +10005 *
Damien Millere323df62003-05-18 22:24:09 +10006 * 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.
Damien Millerd4a8b7e1999-10-27 13:42:43 +10009 *
Ben Lindstromaf4a6c32003-08-25 01:10:51 +000010 * 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.
Damien Millerd4a8b7e1999-10-27 13:42:43 +100017 */
18
Darren Tucker7f24a0e2005-11-10 16:18:56 +110019/* OPENBSD ORIGINAL: lib/libc/string/strlcpy.c */
20
Ben Lindstromdd21fe92002-06-27 18:23:20 +000021#include "includes.h"
Damien Miller04f80141999-11-19 15:32:34 +110022#ifndef HAVE_STRLCPY
23
Damien Millerd4a8b7e1999-10-27 13:42:43 +100024#include <sys/types.h>
25#include <string.h>
26
27/*
28 * Copy src to string dst of size siz. At most siz-1 characters
29 * will be copied. Always NUL terminates (unless siz == 0).
30 * Returns strlen(src); if retval >= siz, truncation occurred.
31 */
Damien Miller180207f2001-06-28 14:48:28 +100032size_t
Damien Millere323df62003-05-18 22:24:09 +100033strlcpy(char *dst, const char *src, size_t siz)
Damien Millerd4a8b7e1999-10-27 13:42:43 +100034{
Darren Tucker52245662005-11-10 16:26:17 +110035 char *d = dst;
36 const char *s = src;
37 size_t n = siz;
Damien Millerd4a8b7e1999-10-27 13:42:43 +100038
39 /* Copy as many bytes as will fit */
Damien Millerb9cd0492011-09-23 10:38:11 +100040 if (n != 0) {
41 while (--n != 0) {
42 if ((*d++ = *s++) == '\0')
Damien Millerd4a8b7e1999-10-27 13:42:43 +100043 break;
Damien Millerb9cd0492011-09-23 10:38:11 +100044 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +100045 }
46
47 /* Not enough room in dst, add NUL and traverse rest of src */
48 if (n == 0) {
49 if (siz != 0)
50 *d = '\0'; /* NUL-terminate dst */
51 while (*s++)
52 ;
53 }
54
55 return(s - src - 1); /* count does not include NUL */
56}
Damien Millere413cba1999-10-28 14:12:54 +100057
58#endif /* !HAVE_STRLCPY */