1b0104773SPascal Brand /* This file is copied from newlib-1.19 */ 2b0104773SPascal Brand 3b0104773SPascal Brand /* $OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $ */ 4b0104773SPascal Brand 5b0104773SPascal Brand /* 6b0104773SPascal Brand * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 7b0104773SPascal Brand * All rights reserved. 8b0104773SPascal Brand * 9b0104773SPascal Brand * Redistribution and use in source and binary forms, with or without 10b0104773SPascal Brand * modification, are permitted provided that the following conditions 11b0104773SPascal Brand * are met: 12b0104773SPascal Brand * 1. Redistributions of source code must retain the above copyright 13b0104773SPascal Brand * notice, this list of conditions and the following disclaimer. 14b0104773SPascal Brand * 2. Redistributions in binary form must reproduce the above copyright 15b0104773SPascal Brand * notice, this list of conditions and the following disclaimer in the 16b0104773SPascal Brand * documentation and/or other materials provided with the distribution. 17b0104773SPascal Brand * 3. The name of the author may not be used to endorse or promote products 18b0104773SPascal Brand * derived from this software without specific prior written permission. 19b0104773SPascal Brand * 20b0104773SPascal Brand * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 21b0104773SPascal Brand * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 22b0104773SPascal Brand * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 23b0104773SPascal Brand * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24b0104773SPascal Brand * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25b0104773SPascal Brand * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 26b0104773SPascal Brand * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27b0104773SPascal Brand * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 28b0104773SPascal Brand * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 29b0104773SPascal Brand * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30b0104773SPascal Brand */ 31b0104773SPascal Brand 32b0104773SPascal Brand #if defined(LIBC_SCCS) && !defined(lint) 33b0104773SPascal Brand static char *rcsid = 34b0104773SPascal Brand "$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $"; 35b0104773SPascal Brand #endif /* LIBC_SCCS and not lint */ 36b0104773SPascal Brand 37*ec219598SPascal Brand #include <types_ext.h> 38b0104773SPascal Brand #include <string_ext.h> 39b0104773SPascal Brand 40b0104773SPascal Brand /* 41b0104773SPascal Brand * Copy src to string dst of size siz. At most siz-1 characters 42b0104773SPascal Brand * will be copied. Always NUL terminates (unless siz == 0). 43b0104773SPascal Brand * Returns strlen(src); if retval >= siz, truncation occurred. 44b0104773SPascal Brand */ 45b0104773SPascal Brand size_t strlcpy(char *dst, const char *src, size_t siz) 46b0104773SPascal Brand { 47b0104773SPascal Brand register char *d = dst; 48b0104773SPascal Brand register const char *s = src; 49b0104773SPascal Brand register size_t n = siz; 50b0104773SPascal Brand 51b0104773SPascal Brand /* Copy as many bytes as will fit */ 52b0104773SPascal Brand if (n != 0 && --n != 0) { 53b0104773SPascal Brand do { 54b0104773SPascal Brand if ((*d++ = *s++) == 0) 55b0104773SPascal Brand break; 56b0104773SPascal Brand } while (--n != 0); 57b0104773SPascal Brand } 58b0104773SPascal Brand 59b0104773SPascal Brand /* Not enough room in dst, add NUL and traverse rest of src */ 60b0104773SPascal Brand if (n == 0) { 61b0104773SPascal Brand if (siz != 0) 62b0104773SPascal Brand *d = '\0'; /* NUL-terminate dst */ 63b0104773SPascal Brand while (*s++) 64b0104773SPascal Brand ; 65b0104773SPascal Brand } 66b0104773SPascal Brand 67b0104773SPascal Brand return s - src - 1; /* count does not include NUL */ 68b0104773SPascal Brand } 69