/*	$OpenBSD: strlcat.c,v 1.2 1999/06/17 16:28:58 millert Exp $	*/ /* * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products *    derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <sys/types.h>#include <string.h> /* * Appends src to string dst of size siz (unlike strncat, siz is the * full size of dst, not space left).  At most siz-1 characters * will be copied.  Always NUL terminates (unless siz <= strlen(dst)). * Returns strlen(src) + MIN(siz, strlen(initial dst)). * If retval >= siz, truncation occurred. */size_tstrlcat(dst, src, siz)	char *dst;	const char *src;	size_t siz;{	char *d = dst;	const char *s = src;	size_t n = siz;	size_t dlen; 	/* Find the end of dst and adjust bytes left but don't go past end */	while (n-- != 0 && *d != '\0')		d++;	dlen = d - dst;	n = siz - dlen; 	if (n == 0)		return(dlen + strlen(s));	while (*s != '\0') {		if (n != 1) {			*d++ = *s;			n--;		}		s++;	}	*d = '\0'; 	return(dlen + (s - src));	/* count does not include NUL */}