1 /* $NetBSD: strlcpy.c,v 1.5 2020/05/25 20:47:33 christos Exp $ */
2
3 /* $OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $ */
4
5 /*
6 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
22 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
23 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #if defined(LIBC_SCCS) && !defined(lint)
33 static char *rcsid = "$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $";
34 #endif /* LIBC_SCCS and not lint */
35
36 #include "event2/event-config.h"
37 #include "evconfig-private.h"
38
39 #include <sys/types.h>
40
41 #ifndef EVENT__HAVE_STRLCPY
42 #include "strlcpy-internal.h"
43
44 /*
45 * Copy src to string dst of size siz. At most siz-1 characters
46 * will be copied. Always NUL terminates (unless siz == 0).
47 * Returns strlen(src); if retval >= siz, truncation occurred.
48 */
49 size_t
event_strlcpy_(dst,src,siz)50 event_strlcpy_(dst, src, siz)
51 char *dst;
52 const char *src;
53 size_t siz;
54 {
55 register char *d = dst;
56 register const char *s = src;
57 register size_t n = siz;
58
59 /* Copy as many bytes as will fit */
60 if (n != 0 && --n != 0) {
61 do {
62 if ((*d++ = *s++) == 0)
63 break;
64 } while (--n != 0);
65 }
66
67 /* Not enough room in dst, add NUL and traverse rest of src */
68 if (n == 0) {
69 if (siz != 0)
70 *d = '\0'; /* NUL-terminate dst */
71 while (*s++)
72 ;
73 }
74
75 return (s - src - 1); /* count does not include NUL */
76 }
77 #endif
78