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 THE AUTHOR DISCLAIMS ALL WARRANTIES
 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE
15 */
16
17#include <string.h>
18#include <sys/types.h>
19
20#include "../util.h"
21
22/*
23 * copy src to string dst of size siz. at most siz-1 characters
24 * will be copied. always NUL terminates (unless siz == 0)
25 * returns strlen(src); if retval >= siz, truncation occurred
26 */
27size_t
28strlcpy(char *dst, const char *src, size_t siz)
29{
30  char       *d = dst;
31  const char *s = src;
32  size_t      n = siz;
33  /* copy as many bytes as will fit */
34  if (n != 0) {
35    while (--n != 0) {
36      if ((*d++ = *s++) == '\0')
37        break;
38    }
39  }
40  /* not enough room in dst, add NUL and traverse rest of src */
41  if (n == 0) {
42    if (siz != 0)
43      *d = '\0'; /* nul-terminate dst */
44    while (*s++)
45      ;
46  }
47  return (s - src - 1); /* count does not include NUL */
48}
49
50size_t
51estrlcpy(char *dst, const char *src, size_t siz)
52{
53  size_t ret;
54
55  if ((ret = strlcpy(dst, src, siz)) >= siz)
56    eprintf("strlcpy: input string too long\n");
57
58  return ret;
59}