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 <ldns/config.h>
21 #ifndef HAVE_STRLCPY
22
23 #include <sys/types.h>
24 #include <string.h>
25
26 /*
27 * Copy src to string dst of size siz. At most siz-1 characters
28 * will be copied. Always NUL terminates (unless siz == 0).
29 * Returns strlen(src); if retval >= siz, truncation occurred.
30 */
31 size_t
strlcpy(char * dst,const char * src,size_t siz)32 strlcpy(char *dst, const char *src, size_t siz)
33 {
34 char *d = dst;
35 const char *s = src;
36 size_t n = siz;
37
38 /* Copy as many bytes as will fit */
39 if (n != 0 && --n != 0) {
40 do {
41 if ((*d++ = *s++) == 0)
42 break;
43 } while (--n != 0);
44 }
45
46 /* Not enough room in dst, add NUL and traverse rest of src */
47 if (n == 0) {
48 if (siz != 0)
49 *d = '\0'; /* NUL-terminate dst */
50 while (*s++)
51 ;
52 }
53
54 return(s - src - 1); /* count does not include NUL */
55 }
56
57 #endif /* !HAVE_STRLCPY */
58