1 /* $OpenBSD: strlcat.c,v 1.5 2001/01/13 16:17:24 millert Exp $ */
4 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
19 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
27 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #if defined(LIBC_SCCS) && !defined(lint)
34 static char *rcsid = "$OpenBSD: strlcat.c,v 1.5 2001/01/13 16:17:24 millert Exp $";
35 #endif /* LIBC_SCCS and not lint */
37 #include <sys/types.h>
41 * Appends src to string dst of size siz (unlike strncat, siz is the
42 * full size of dst, not space left). At most siz-1 characters
43 * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
44 * Returns strlen(initial dst) + strlen(src); if retval >= siz,
45 * truncation occurred.
47 size_t strlcat(dst, src, siz)
52 register char *d = dst;
53 register const char *s = src;
54 register size_t n = siz;
57 /* Find the end of dst and adjust bytes left but don't go past end */
58 while (n-- != 0 && *d != '\0')
64 return(dlen + strlen(s));
74 return(dlen + (s - src)); /* count does not include NUL */
77 #endif /* !HAVE_STRLCAT */