1*c43e99fdSEd Maste /* $OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $ */
2*c43e99fdSEd Maste
3*c43e99fdSEd Maste /*
4*c43e99fdSEd Maste * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
5*c43e99fdSEd Maste * All rights reserved.
6*c43e99fdSEd Maste *
7*c43e99fdSEd Maste * Redistribution and use in source and binary forms, with or without
8*c43e99fdSEd Maste * modification, are permitted provided that the following conditions
9*c43e99fdSEd Maste * are met:
10*c43e99fdSEd Maste * 1. Redistributions of source code must retain the above copyright
11*c43e99fdSEd Maste * notice, this list of conditions and the following disclaimer.
12*c43e99fdSEd Maste * 2. Redistributions in binary form must reproduce the above copyright
13*c43e99fdSEd Maste * notice, this list of conditions and the following disclaimer in the
14*c43e99fdSEd Maste * documentation and/or other materials provided with the distribution.
15*c43e99fdSEd Maste * 3. The name of the author may not be used to endorse or promote products
16*c43e99fdSEd Maste * derived from this software without specific prior written permission.
17*c43e99fdSEd Maste *
18*c43e99fdSEd Maste * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
19*c43e99fdSEd Maste * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
20*c43e99fdSEd Maste * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21*c43e99fdSEd Maste * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22*c43e99fdSEd Maste * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23*c43e99fdSEd Maste * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24*c43e99fdSEd Maste * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25*c43e99fdSEd Maste * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26*c43e99fdSEd Maste * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
27*c43e99fdSEd Maste * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28*c43e99fdSEd Maste */
29*c43e99fdSEd Maste
30*c43e99fdSEd Maste #if defined(LIBC_SCCS) && !defined(lint)
31*c43e99fdSEd Maste static char *rcsid = "$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $";
32*c43e99fdSEd Maste #endif /* LIBC_SCCS and not lint */
33*c43e99fdSEd Maste
34*c43e99fdSEd Maste #include "event2/event-config.h"
35*c43e99fdSEd Maste #include "evconfig-private.h"
36*c43e99fdSEd Maste
37*c43e99fdSEd Maste #include <sys/types.h>
38*c43e99fdSEd Maste
39*c43e99fdSEd Maste #ifndef EVENT__HAVE_STRLCPY
40*c43e99fdSEd Maste #include "strlcpy-internal.h"
41*c43e99fdSEd Maste
42*c43e99fdSEd Maste /*
43*c43e99fdSEd Maste * Copy src to string dst of size siz. At most siz-1 characters
44*c43e99fdSEd Maste * will be copied. Always NUL terminates (unless siz == 0).
45*c43e99fdSEd Maste * Returns strlen(src); if retval >= siz, truncation occurred.
46*c43e99fdSEd Maste */
47*c43e99fdSEd Maste size_t
event_strlcpy_(dst,src,siz)48*c43e99fdSEd Maste event_strlcpy_(dst, src, siz)
49*c43e99fdSEd Maste char *dst;
50*c43e99fdSEd Maste const char *src;
51*c43e99fdSEd Maste size_t siz;
52*c43e99fdSEd Maste {
53*c43e99fdSEd Maste register char *d = dst;
54*c43e99fdSEd Maste register const char *s = src;
55*c43e99fdSEd Maste register size_t n = siz;
56*c43e99fdSEd Maste
57*c43e99fdSEd Maste /* Copy as many bytes as will fit */
58*c43e99fdSEd Maste if (n != 0 && --n != 0) {
59*c43e99fdSEd Maste do {
60*c43e99fdSEd Maste if ((*d++ = *s++) == 0)
61*c43e99fdSEd Maste break;
62*c43e99fdSEd Maste } while (--n != 0);
63*c43e99fdSEd Maste }
64*c43e99fdSEd Maste
65*c43e99fdSEd Maste /* Not enough room in dst, add NUL and traverse rest of src */
66*c43e99fdSEd Maste if (n == 0) {
67*c43e99fdSEd Maste if (siz != 0)
68*c43e99fdSEd Maste *d = '\0'; /* NUL-terminate dst */
69*c43e99fdSEd Maste while (*s++)
70*c43e99fdSEd Maste ;
71*c43e99fdSEd Maste }
72*c43e99fdSEd Maste
73*c43e99fdSEd Maste return (s - src - 1); /* count does not include NUL */
74*c43e99fdSEd Maste }
75*c43e99fdSEd Maste #endif
76