1c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott/* $OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $ */ 2c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 3c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott/* 4c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 5c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * All rights reserved. 6c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * 7c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * Redistribution and use in source and binary forms, with or without 8c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * modification, are permitted provided that the following conditions 9c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * are met: 10c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * 1. Redistributions of source code must retain the above copyright 11c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * notice, this list of conditions and the following disclaimer. 12c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * 2. Redistributions in binary form must reproduce the above copyright 13c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * notice, this list of conditions and the following disclaimer in the 14c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * documentation and/or other materials provided with the distribution. 15c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * 3. The name of the author may not be used to endorse or promote products 16c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * derived from this software without specific prior written permission. 17c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * 18c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 19c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 20c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 21c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 22c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 23c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 24c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 26c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 27c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott */ 29c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 30c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#if defined(LIBC_SCCS) && !defined(lint) 31c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottstatic char *rcsid = "$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $"; 32c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#endif /* LIBC_SCCS and not lint */ 33c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 34c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include <sys/types.h> 35c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 36c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#ifdef HAVE_CONFIG_H 37c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "config.h" 38c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#endif /* HAVE_CONFIG_H */ 39c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 40c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#ifndef HAVE_STRLCPY 41c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "strlcpy-internal.h" 42c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 43c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott/* 44c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * Copy src to string dst of size siz. At most siz-1 characters 45c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * will be copied. Always NUL terminates (unless siz == 0). 46c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * Returns strlen(src); if retval >= siz, truncation occurred. 47c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott */ 48c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottsize_t 49c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott_event_strlcpy(dst, src, siz) 50c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott char *dst; 51c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott const char *src; 52c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott size_t siz; 53c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott{ 54c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott register char *d = dst; 55c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott register const char *s = src; 56c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott register size_t n = siz; 57c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 58c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott /* Copy as many bytes as will fit */ 59c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (n != 0 && --n != 0) { 60c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott do { 61c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if ((*d++ = *s++) == 0) 62c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott break; 63c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } while (--n != 0); 64c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 65c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 66c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott /* Not enough room in dst, add NUL and traverse rest of src */ 67c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (n == 0) { 68c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (siz != 0) 69c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott *d = '\0'; /* NUL-terminate dst */ 70c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott while (*s++) 71c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ; 72c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 73c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 74c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return(s - src - 1); /* count does not include NUL */ 75c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 76c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#endif 77