Back to index

tor  0.2.3.19-rc
strlcpy.c
Go to the documentation of this file.
00001 /*     $OpenBSD: strlcpy.c,v 1.2 1998/11/06 04:33:16 wvdputte Exp $   */
00002 
00003 /*
00004  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
00005  * All rights reserved.
00006  *
00007  * Redistribution and use in source and binary forms, with or without
00008  * modification, are permitted provided that the following conditions
00009  * are met:
00010  * 1. Redistributions of source code must retain the above copyright
00011  *    notice, this list of conditions and the following disclaimer.
00012  * 2. Redistributions in binary form must reproduce the above copyright
00013  *    notice, this list of conditions and the following disclaimer in the
00014  *    documentation and/or other materials provided with the distribution.
00015  * 3. The name of the author may not be used to endorse or promote products
00016  *    derived from this software without specific prior written permission.
00017  *
00018  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
00019  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
00020  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
00021  * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00022  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00023  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
00024  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
00025  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
00026  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
00027  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00028  */
00029 
00030 #if defined(LIBC_SCCS) && !defined(lint)
00031 static char *rcsid = "$OpenBSD: strlcpy.c,v 1.2 1998/11/06 04:33:16 wvdputte Exp $";
00032 #endif /* LIBC_SCCS and not lint */
00033 
00034 #include <sys/types.h>
00035 #include <string.h>
00036 
00037 /*
00038  * Copy src to string dst of size siz.  At most siz-1 characters
00039  * will be copied.  Always NUL terminates (unless siz == 0).
00040  * Returns strlen(src); if retval >= siz, truncation occurred.
00041  */
00042 size_t strlcpy(char *dst, const char *src, size_t siz)
00043 {
00044        register char *d = dst;
00045        register const char *s = src;
00046        register size_t n = siz;
00047 
00048        if (n == 0)
00049               return(strlen(s));
00050        while (*s != '\0') {
00051               if (n != 1) {
00052                      *d++ = *s;
00053                      n--;
00054               }
00055               s++;
00056        }
00057        *d = '\0';
00058 
00059        return(s - src);     /* count does not include NUL */
00060 }