cfengine  3.15.4
About: CFEngine is a configuration management system for configuring and maintaining Unix-like computers (using an own high level policy language). Community version.
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strlcat.c
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1 /* $OpenBSD: strlcat.c,v 1.12 2005/03/30 20:13:52 otto Exp $ */
2 
3 /*
4  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 
19 #ifdef HAVE_CONFIG_H
20 # include <config.h>
21 #endif
22 
23 #include <sys/types.h>
24 #include <string.h>
25 
26 size_t strlcat(char *dst, const char *src, size_t siz);
27 
28 /*
29  * Appends src to string dst of size siz (unlike strncat, siz is the
30  * full size of dst, not space left). At most siz-1 characters
31  * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
32  * Returns strlen(src) + MIN(siz, strlen(initial dst)).
33  * If retval >= siz, truncation occurred.
34  */
35 size_t
36 strlcat(char *dst, const char *src, size_t siz)
37 {
38  char *d = dst;
39  const char *s = src;
40  size_t n = siz;
41  size_t dlen;
42 
43  /* Find the end of dst and adjust bytes left but don't go past end */
44  while (n-- != 0 && *d != '\0')
45  d++;
46  dlen = d - dst;
47  n = siz - dlen;
48 
49  if (n == 0)
50  return(dlen + strlen(s));
51  while (*s != '\0') {
52  if (n != 1) {
53  *d++ = *s;
54  n--;
55  }
56  s++;
57  }
58  *d = '\0';
59 
60  return(dlen + (s - src)); /* count does not include NUL */
61 }
size_t strlcat(char *dst, const char *src, size_t siz)
Definition: strlcat.c:36