1 /* 2 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 17 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 18 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 19 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * dollar OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp dollar 28 * $P4: //depot/projects/trustedbsd/openbsm/compat/strlcpy.h#1 $ 29 */ 30 31 /* 32 * Copy src to string dst of size siz. At most siz-1 characters 33 * will be copied. Always NUL terminates (unless siz == 0). 34 * Returns strlen(src); if retval >= siz, truncation occurred. 35 */ 36 static size_t 37 strlcpy(dst, src, siz) 38 char *dst; 39 const char *src; 40 size_t siz; 41 { 42 char *d = dst; 43 const char *s = src; 44 size_t n = siz; 45 46 /* Copy as many bytes as will fit */ 47 if (n != 0 && --n != 0) { 48 do { 49 if ((*d++ = *s++) == 0) 50 break; 51 } while (--n != 0); 52 } 53 54 /* Not enough room in dst, add NUL and traverse rest of src */ 55 if (n == 0) { 56 if (siz != 0) 57 *d = '\0'; /* NUL-terminate dst */ 58 while (*s++) 59 ; 60 } 61 62 return(s - src - 1); /* count does not include NUL */ 63 } 64