1 /* $OpenBSD: strlcat.c,v 1.10 2003/04/12 21:56:39 millert Exp $ */
4 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
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.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND TODD C. MILLER DISCLAIMS ALL
11 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
12 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER BE LIABLE
13 * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
15 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
16 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 #if defined(LIBC_SCCS) && !defined(lint)
23 static char *rcsid = "$OpenBSD: strlcat.c,v 1.10 2003/04/12 21:56:39 millert Exp $";
24 #endif /* LIBC_SCCS and not lint */
26 #include <sys/types.h>
31 * Appends src to string dst of size siz (unlike strncat, siz is the
32 * full size of dst, not space left). At most siz-1 characters
33 * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
34 * Returns strlen(src) + MIN(siz, strlen(initial dst)).
35 * If retval >= siz, truncation occurred.
38 strlcat(char *dst, const char *src, size_t siz)
40 register char *d = dst;
41 register const char *s = src;
42 register size_t n = siz;
45 /* Find the end of dst and adjust bytes left but don't go past end */
46 while (n-- != 0 && *d != '\0')
52 return(dlen + strlen(s));
62 return(dlen + (s - src)); /* count does not include NUL */
65 #endif /* !HAVE_STRLCAT */