1157016Sdes/*	$OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $	*/
2126274Sdes
398937Sdes/*
498937Sdes * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
598937Sdes *
6124208Sdes * Permission to use, copy, modify, and distribute this software for any
7124208Sdes * purpose with or without fee is hereby granted, provided that the above
8124208Sdes * copyright notice and this permission notice appear in all copies.
998937Sdes *
10124208Sdes * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11124208Sdes * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12124208Sdes * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13124208Sdes * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14124208Sdes * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15124208Sdes * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16124208Sdes * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1798937Sdes */
1898937Sdes
19157016Sdes/* OPENBSD ORIGINAL: lib/libc/string/strlcat.c */
20157016Sdes
21106121Sdes#include "includes.h"
2298937Sdes#ifndef HAVE_STRLCAT
2398937Sdes
2498937Sdes#include <sys/types.h>
2598937Sdes#include <string.h>
2698937Sdes
2798937Sdes/*
2898937Sdes * Appends src to string dst of size siz (unlike strncat, siz is the
2998937Sdes * full size of dst, not space left).  At most siz-1 characters
3098937Sdes * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
3198937Sdes * Returns strlen(src) + MIN(siz, strlen(initial dst)).
3298937Sdes * If retval >= siz, truncation occurred.
3398937Sdes */
3498937Sdessize_t
35124208Sdesstrlcat(char *dst, const char *src, size_t siz)
3698937Sdes{
37157016Sdes	char *d = dst;
38157016Sdes	const char *s = src;
39157016Sdes	size_t n = siz;
4098937Sdes	size_t dlen;
4198937Sdes
4298937Sdes	/* Find the end of dst and adjust bytes left but don't go past end */
4398937Sdes	while (n-- != 0 && *d != '\0')
4498937Sdes		d++;
4598937Sdes	dlen = d - dst;
4698937Sdes	n = siz - dlen;
4798937Sdes
4898937Sdes	if (n == 0)
4998937Sdes		return(dlen + strlen(s));
5098937Sdes	while (*s != '\0') {
5198937Sdes		if (n != 1) {
5298937Sdes			*d++ = *s;
5398937Sdes			n--;
5498937Sdes		}
5598937Sdes		s++;
5698937Sdes	}
5798937Sdes	*d = '\0';
5898937Sdes
5998937Sdes	return(dlen + (s - src));	/* count does not include NUL */
6098937Sdes}
6198937Sdes
6298937Sdes#endif /* !HAVE_STRLCAT */
63