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