175115Sfenner/* $NetBSD: strlcpy.c,v 1.5 1999/09/20 04:39:47 lukem Exp $ */ 275115Sfenner/* from OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp */ 375115Sfenner 475115Sfenner/* 575115Sfenner * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 675115Sfenner * All rights reserved. 775115Sfenner * 875115Sfenner * Redistribution and use in source and binary forms, with or without 975115Sfenner * modification, are permitted provided that the following conditions 1075115Sfenner * are met: 1175115Sfenner * 1. Redistributions of source code must retain the above copyright 1275115Sfenner * notice, this list of conditions and the following disclaimer. 1375115Sfenner * 2. Redistributions in binary form must reproduce the above copyright 1475115Sfenner * notice, this list of conditions and the following disclaimer in the 1575115Sfenner * documentation and/or other materials provided with the distribution. 1675115Sfenner * 3. The name of the author may not be used to endorse or promote products 1775115Sfenner * derived from this software without specific prior written permission. 1875115Sfenner * 1975115Sfenner * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 2075115Sfenner * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 2175115Sfenner * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 2275115Sfenner * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 2375115Sfenner * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 2475115Sfenner * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 2575115Sfenner * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 2675115Sfenner * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 2775115Sfenner * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 2875115Sfenner * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2975115Sfenner */ 3075115Sfenner 3175115Sfenner#ifndef lint 32127668Sbmsstatic const char rcsid[] _U_ = 33190207Srpaulo "@(#) $Header: /tcpdump/master/tcpdump/missing/strlcpy.c,v 1.5 2003-11-16 09:36:52 guy Exp $ (LBL)"; 3475115Sfenner#endif 3575115Sfenner 36127668Sbms#ifdef HAVE_CONFIG_H 3775115Sfenner#include <config.h> 38127668Sbms#endif 3975115Sfenner 40127668Sbms#include <tcpdump-stdinc.h> 41127668Sbms 4275115Sfenner#include <string.h> 4375115Sfenner 4475115Sfenner/* 4575115Sfenner * Copy src to string dst of size siz. At most siz-1 characters 4675115Sfenner * will be copied. Always NUL terminates (unless siz == 0). 4775115Sfenner * Returns strlen(src); if retval >= siz, truncation occurred. 4875115Sfenner */ 4975115Sfennersize_t 50127668Sbmsstrlcpy(char *dst, const char *src, size_t siz) 5175115Sfenner{ 5275115Sfenner register char *d = dst; 5375115Sfenner register const char *s = src; 5475115Sfenner register size_t n = siz; 5575115Sfenner 5675115Sfenner /* Copy as many bytes as will fit */ 5775115Sfenner if (n != 0 && --n != 0) { 5875115Sfenner do { 5975115Sfenner if ((*d++ = *s++) == 0) 6075115Sfenner break; 6175115Sfenner } while (--n != 0); 6275115Sfenner } 6375115Sfenner 6475115Sfenner /* Not enough room in dst, add NUL and traverse rest of src */ 6575115Sfenner if (n == 0) { 6675115Sfenner if (siz != 0) 6775115Sfenner *d = '\0'; /* NUL-terminate dst */ 6875115Sfenner while (*s++) 6975115Sfenner ; 7075115Sfenner } 7175115Sfenner 7275115Sfenner return(s - src - 1); /* count does not include NUL */ 7375115Sfenner} 74