1187090Sdelphij/* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */ 249593Simp 349593Simp/* 449593Simp * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 549593Simp * 6187090Sdelphij * Permission to use, copy, modify, and distribute this software for any 7187090Sdelphij * purpose with or without fee is hereby granted, provided that the above 8187090Sdelphij * copyright notice and this permission notice appear in all copies. 949593Simp * 10187090Sdelphij * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11187090Sdelphij * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12187090Sdelphij * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13187090Sdelphij * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14187090Sdelphij * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15187090Sdelphij * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16187090Sdelphij * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 1749593Simp */ 1849593Simp 1986170Sobrien#include <sys/cdefs.h> 2086170Sobrien__FBSDID("$FreeBSD: releng/10.2/lib/libc/string/strlcat.c 189133 2009-02-28 05:15:02Z das $"); 2149593Simp 2249593Simp#include <sys/types.h> 2349593Simp#include <string.h> 2449593Simp 2549593Simp/* 2649593Simp * Appends src to string dst of size siz (unlike strncat, siz is the 2749593Simp * full size of dst, not space left). At most siz-1 characters 2871191Sjedgar * will be copied. Always NUL terminates (unless siz <= strlen(dst)). 2980274Skris * Returns strlen(src) + MIN(siz, strlen(initial dst)). 3080274Skris * If retval >= siz, truncation occurred. 3149593Simp */ 3280274Skrissize_t 33189133Sdasstrlcat(char * __restrict dst, const char * __restrict src, size_t siz) 3449593Simp{ 3592889Sobrien char *d = dst; 3692889Sobrien const char *s = src; 3792889Sobrien size_t n = siz; 3849593Simp size_t dlen; 3949593Simp 4049594Simp /* Find the end of dst and adjust bytes left but don't go past end */ 4171191Sjedgar while (n-- != 0 && *d != '\0') 4249593Simp d++; 4349593Simp dlen = d - dst; 4449594Simp n = siz - dlen; 4549593Simp 4649593Simp if (n == 0) 4749593Simp return(dlen + strlen(s)); 4849593Simp while (*s != '\0') { 4949593Simp if (n != 1) { 5049593Simp *d++ = *s; 5149593Simp n--; 5249593Simp } 5349593Simp s++; 5449593Simp } 5549593Simp *d = '\0'; 5649593Simp 5749593Simp return(dlen + (s - src)); /* count does not include NUL */ 5849593Simp} 59