dsniff  2.4b2
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strlcat.c
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1 /* $Id: strlcat.c,v 1.1 2000/04/08 20:50:28 dugsong Exp $ */
2 /* $OpenBSD: strlcat.c,v 1.1 1998/07/01 01:29:45 millert Exp $ */
3 
4 /*
5  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  * notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in the
15  * documentation and/or other materials provided with the distribution.
16  * 3. The name of the author may not be used to endorse or promote products
17  * derived from this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
20  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
21  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
22  * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
25  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
27  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
28  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #if defined(LIBC_SCCS) && !defined(lint)
32 static char *rcsid = "$OpenBSD: strlcat.c,v 1.1 1998/07/01 01:29:45 millert Exp $";
33 #endif /* LIBC_SCCS and not lint */
34 
35 #include <sys/types.h>
36 #include <string.h>
37 
38 /*
39  * Appends src to string dst of size siz (unlike strncat, siz is the
40  * full size of dst, not space left). At most siz-1 characters
41  * will be copied. Always NUL terminates (unless siz == 0).
42  * Returns strlen(src); if retval >= siz, truncation occurred.
43  */
44 size_t strlcat(dst, src, siz)
45  char *dst;
46  const char *src;
47  size_t siz;
48 {
49  register char *d = dst;
50  register const char *s = src;
51  register size_t n = siz;
52  size_t dlen;
53 
54  /* Find the end of dst and adjust bytes left */
55  while (*d != '\0' && n != 0)
56  d++;
57  dlen = d - dst;
58  n -= dlen;
59 
60  if (n == 0)
61  return(dlen + strlen(s));
62  while (*s != '\0') {
63  if (n != 1) {
64  *d++ = *s;
65  n--;
66  }
67  s++;
68  }
69  *d = '\0';
70 
71  return(dlen + (s - src)); /* count does not include NUL */
72 }
strlcat
size_t strlcat(char *dst, const char *src, size_t siz)
Definition: strlcat.c:44