1 /* from openssh 4.3p2 compat/strlcpy.c */
2 /*
3 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 /* OPENBSD ORIGINAL: lib/libc/string/strlcpy.c */
19
20 #include "defs.h"
21
22 #ifndef HAVE_LIBBSD
23 #ifndef HAVE_STRLCPY
24
25 #include <sys/types.h>
26 #include <string.h>
27
28 /*
29 * Copy src to string dst of size siz. At most siz-1 characters
30 * will be copied. Always NUL terminates (unless siz == 0).
31 * Returns strlen(src); if retval >= siz, truncation occurred.
32 */
strlcpy(char * dst,const char * src,size_t siz)33 size_t strlcpy(char *dst, const char *src, size_t siz)
34 {
35 char *d = dst;
36 const char *s = src;
37 size_t n = siz;
38
39 /* Copy as many bytes as will fit */
40 if (n != 0 && --n != 0) {
41 do {
42 if ((*d++ = *s++) == 0)
43 break;
44 } while (--n != 0);
45 }
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 return (size_t) (s - src - 1); /* count does not include NUL */
55 }
56
57 #endif /* !HAVE_LIBBSD */
58 #endif /* !HAVE_STRLCPY */
59