1#ifdef HAVE_CONFIG_H 2#include "config.h" 3#endif 4 5#ifdef HAVE_STRLCAT 6 7int dummy; 8 9#else 10 11/* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */ 12 13/* 14 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 15 * 16 * Permission to use, copy, modify, and distribute this software for any 17 * purpose with or without fee is hereby granted, provided that the above 18 * copyright notice and this permission notice appear in all copies. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 21 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 22 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 23 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 24 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 25 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 26 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 27 */ 28 29#include <sys/types.h> 30#include <string.h> 31 32/* 33 * Appends src to string dst of size siz (unlike strncat, siz is the 34 * full size of dst, not space left). At most siz-1 characters 35 * will be copied. Always NUL terminates (unless siz <= strlen(dst)). 36 * Returns strlen(src) + MIN(siz, strlen(initial dst)). 37 * If retval >= siz, truncation occurred. 38 */ 39size_t 40strlcat(char *dst, const char *src, size_t siz) 41{ 42 char *d = dst; 43 const char *s = src; 44 size_t n = siz; 45 size_t dlen; 46 47 /* Find the end of dst and adjust bytes left but don't go past end */ 48 while (n-- != 0 && *d != '\0') 49 d++; 50 dlen = d - dst; 51 n = siz - dlen; 52 53 if (n == 0) 54 return(dlen + strlen(s)); 55 while (*s != '\0') { 56 if (n != 1) { 57 *d++ = *s; 58 n--; 59 } 60 s++; 61 } 62 *d = '\0'; 63 64 return(dlen + (s - src)); /* count does not include NUL */ 65} 66 67#endif 68