1 /* $NetBSD: strlcpy.c,v 1.1.1.2 2017/01/31 21:14:53 christos Exp $ */ 2 /* $OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $ */ 3 4 /* 5 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 20 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 21 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 22 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 25 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 27 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #if defined(LIBC_SCCS) && !defined(lint) 32 static char *rcsid = "$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $"; 33 #endif /* LIBC_SCCS and not lint */ 34 35 #include "event2/event-config.h" 36 #include <sys/cdefs.h> 37 __RCSID("$NetBSD: strlcpy.c,v 1.1.1.2 2017/01/31 21:14:53 christos Exp $"); 38 #include "evconfig-private.h" 39 40 #include <sys/types.h> 41 42 #ifndef EVENT__HAVE_STRLCPY 43 #include "strlcpy-internal.h" 44 45 /* 46 * Copy src to string dst of size siz. At most siz-1 characters 47 * will be copied. Always NUL terminates (unless siz == 0). 48 * Returns strlen(src); if retval >= siz, truncation occurred. 49 */ 50 size_t 51 event_strlcpy_(dst, src, siz) 52 char *dst; 53 const char *src; 54 size_t siz; 55 { 56 register char *d = dst; 57 register const char *s = src; 58 register size_t n = siz; 59 60 /* Copy as many bytes as will fit */ 61 if (n != 0 && --n != 0) { 62 do { 63 if ((*d++ = *s++) == 0) 64 break; 65 } while (--n != 0); 66 } 67 68 /* Not enough room in dst, add NUL and traverse rest of src */ 69 if (n == 0) { 70 if (siz != 0) 71 *d = '\0'; /* NUL-terminate dst */ 72 while (*s++) 73 ; 74 } 75 76 return (s - src - 1); /* count does not include NUL */ 77 } 78 #endif 79