1 /*
2 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND TODD C. MILLER DISCLAIMS ALL
9 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
10 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER BE LIABLE
11 * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
17 #ifdef HAVE_DIX_CONFIG_H
18 #include <dix-config.h>
19 #endif
21 #include <sys/types.h>
22 #include <string.h>
23 #include "os.h"
25 /*
26 * Copy src to string dst of size siz. At most siz-1 characters
27 * will be copied. Always NUL terminates (unless siz == 0).
28 * Returns strlen(src); if retval >= siz, truncation occurred.
29 */
30 size_t
31 strlcpy(char *dst, const char *src, size_t siz)
32 {
33 register char *d = dst;
34 register const char *s = src;
35 register size_t n = siz;
37 /* Copy as many bytes as will fit */
38 if (n != 0 && --n != 0) {
39 do {
40 if ((*d++ = *s++) == 0)
41 break;
42 } while (--n != 0);
43 }
45 /* Not enough room in dst, add NUL and traverse rest of src */
46 if (n == 0) {
47 if (siz != 0)
48 *d = '\0'; /* NUL-terminate dst */
49 while (*s++)
50 ;
51 }
53 return s - src - 1; /* count does not include NUL */
54 }