1 /* $NetBSD: strlcpy.c,v 1.1.1.2 2017/01/31 21:14:53 christos Exp $ */
2 /* $OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $ */
3
4 /*
5 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
20 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
21 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
22 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
25 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
27 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #if defined(LIBC_SCCS) && !defined(lint)
32 static char *rcsid = "$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $";
33 #endif /* LIBC_SCCS and not lint */
34
35 #include "event2/event-config.h"
36 #include <sys/cdefs.h>
37 __RCSID("$NetBSD: strlcpy.c,v 1.1.1.2 2017/01/31 21:14:53 christos Exp $");
38 #include "evconfig-private.h"
39
40 #include <sys/types.h>
41
42 #ifndef EVENT__HAVE_STRLCPY
43 #include "strlcpy-internal.h"
44
45 /*
46 * Copy src to string dst of size siz. At most siz-1 characters
47 * will be copied. Always NUL terminates (unless siz == 0).
48 * Returns strlen(src); if retval >= siz, truncation occurred.
49 */
50 size_t
event_strlcpy_(dst,src,siz)51 event_strlcpy_(dst, src, siz)
52 char *dst;
53 const char *src;
54 size_t siz;
55 {
56 register char *d = dst;
57 register const char *s = src;
58 register size_t n = siz;
59
60 /* Copy as many bytes as will fit */
61 if (n != 0 && --n != 0) {
62 do {
63 if ((*d++ = *s++) == 0)
64 break;
65 } while (--n != 0);
66 }
67
68 /* Not enough room in dst, add NUL and traverse rest of src */
69 if (n == 0) {
70 if (siz != 0)
71 *d = '\0'; /* NUL-terminate dst */
72 while (*s++)
73 ;
74 }
75
76 return (s - src - 1); /* count does not include NUL */
77 }
78 #endif
79