libpcap  1.10.1
About: libpcap is a packet filter library used by tools like tcpdump.
  Fossies Dox: libpcap-1.10.1.tar.gz  ("unofficial" and yet experimental doxygen-generated source code documentation)  

strlcpy.c
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1 /* $OpenBSD: pcap_strlcpy.c,v 1.12 2015/01/15 03:54:12 millert Exp $ */
2 
3 /*
4  * Copyright (c) 1998, 2015 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 <stddef.h>
24 #include <string.h>
25 
26 #include "portability.h"
27 
28 /*
29  * Copy string src to buffer dst of size dsize. At most dsize-1
30  * chars will be copied. Always NUL terminates (unless dsize == 0).
31  * Returns strlen(src); if retval >= dsize, truncation occurred.
32  */
33 size_t
34 pcap_strlcpy(char * restrict dst, const char * restrict src, size_t dsize)
35 {
36  const char *osrc = src;
37  size_t nleft = dsize;
38 
39  /* Copy as many bytes as will fit. */
40  if (nleft != 0) {
41  while (--nleft != 0) {
42  if ((*dst++ = *src++) == '\0')
43  break;
44  }
45  }
46 
47  /* Not enough room in dst, add NUL and traverse rest of src. */
48  if (nleft == 0) {
49  if (dsize != 0)
50  *dst = '\0'; /* NUL-terminate dst */
51  while (*src++)
52  ;
53  }
54 
55  return(src - osrc - 1); /* count does not include NUL */
56 }
size_t pcap_strlcpy(char *restrict dst, const char *restrict src, size_t dsize)
Definition: strlcpy.c:34