1266077Sdes/* compat/strlcat.c */ 2266077Sdes 3266077Sdes/*- 4266077Sdes * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 5266077Sdes * All rights reserved. 6266077Sdes * 7266077Sdes * Redistribution and use in source and binary forms, with or without 8266077Sdes * modification, are permitted provided that the following conditions 9266077Sdes * are met: 10266077Sdes * 1. Redistributions of source code must retain the above copyright 11266077Sdes * notice, this list of conditions and the following disclaimer. 12266077Sdes * 2. Redistributions in binary form must reproduce the above copyright 13266077Sdes * notice, this list of conditions and the following disclaimer in the 14266077Sdes * documentation and/or other materials provided with the distribution. 15266077Sdes * 3. The name of the author may not be used to endorse or promote products 16266077Sdes * derived from this software without specific prior written permission. 17266077Sdes * 18266077Sdes * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 19266077Sdes * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 20266077Sdes * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 21266077Sdes * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 22266077Sdes * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 23266077Sdes * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 24266077Sdes * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25266077Sdes * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 26266077Sdes * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 27266077Sdes * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28266077Sdes */ 29266077Sdes 30266077Sdes/* OPENBSD ORIGINAL: lib/libc/string/strlcat.c */ 31266077Sdes 32266077Sdes#include "config.h" 33266077Sdes#ifndef HAVE_STRLCAT 34266077Sdes 35266077Sdes#include <sys/types.h> 36266077Sdes#include <string.h> 37266077Sdes 38266077Sdes/* 39266077Sdes * Appends src to string dst of size siz (unlike strncat, siz is the 40266077Sdes * full size of dst, not space left). At most siz-1 characters 41266077Sdes * will be copied. Always NUL terminates (unless siz <= strlen(dst)). 42266077Sdes * Returns strlen(src) + MIN(siz, strlen(initial dst)). 43266077Sdes * If retval >= siz, truncation occurred. 44266077Sdes */ 45266077Sdessize_t 46266077Sdesstrlcat(char *dst, const char *src, size_t siz) 47266077Sdes{ 48266077Sdes char *d = dst; 49266077Sdes const char *s = src; 50266077Sdes size_t n = siz; 51266077Sdes size_t dlen; 52266077Sdes 53266077Sdes /* Find the end of dst and adjust bytes left but don't go past end */ 54266077Sdes while (n-- != 0 && *d != '\0') 55266077Sdes d++; 56266077Sdes dlen = d - dst; 57266077Sdes n = siz - dlen; 58266077Sdes 59266077Sdes if (n == 0) 60266077Sdes return(dlen + strlen(s)); 61266077Sdes while (*s != '\0') { 62266077Sdes if (n != 1) { 63266077Sdes *d++ = *s; 64266077Sdes n--; 65266077Sdes } 66266077Sdes s++; 67266077Sdes } 68266077Sdes *d = '\0'; 69266077Sdes 70266077Sdes return(dlen + (s - src)); /* count does not include NUL */ 71266077Sdes} 72266077Sdes 73266077Sdes#endif /* !HAVE_STRLCAT */ 74