2 * Copyright (c) 1998, 2015 Todd C. Miller <millert@openbsd.org>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <sys/types.h>
21 * Appends src to string dst of size dsize (unlike strncat, dsize is the
22 * full size of dst, not space left). At most dsize-1 characters
23 * will be copied. Always NUL terminates (unless dsize <= strlen(dst)).
24 * Returns strlen(src) + MIN(dsize, strlen(initial dst)).
25 * If retval >= dsize, truncation occurred.
28 strlcat(char *dst, const char *src, size_t dsize)
30 const char *odst = dst;
31 const char *osrc = src;
35 /* Find the end of dst and adjust bytes left but don't go past end. */
36 while (n-- != 0 && *dst != '\0')
42 return(dlen + strlen(src));
43 while (*src != '\0') {
52 return(dlen + (src - osrc)); /* count does not include NUL */