strlcpy.c - vx32 - Local 9vx git repository for patches.
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       ---
       strlcpy.c (2275B)
       ---
            1 /*        $OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp $        */
            2 
            3 /*
            4  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
            5  * All rights reserved.
            6  *
            7  * Redistribution and use in source and binary forms, with or without
            8  * modification, are permitted provided that the following conditions
            9  * are met:
           10  * 1. Redistributions of source code must retain the above copyright
           11  *    notice, this list of conditions and the following disclaimer.
           12  * 2. Redistributions in binary form must reproduce the above copyright
           13  *    notice, this list of conditions and the following disclaimer in the
           14  *    documentation and/or other materials provided with the distribution.
           15  * 3. The name of the author may not be used to endorse or promote products
           16  *    derived from this software without specific prior written permission.
           17  *
           18  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
           19  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
           20  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
           21  * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
           22  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
           23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
           24  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
           25  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
           26  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
           27  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
           28  */
           29 
           30 #include <sys/types.h>
           31 #include <string.h>
           32 
           33 /*
           34  * Copy src to string dst of size siz.  At most siz-1 characters
           35  * will be copied.  Always NUL terminates (unless siz == 0).
           36  * Returns strlen(src); if retval >= siz, truncation occurred.
           37  */
           38 size_t strlcpy(dst, src, siz)
           39         char *dst;
           40         const char *src;
           41         size_t siz;
           42 {
           43         char *d = dst;
           44         const char *s = src;
           45         size_t n = siz;
           46 
           47         /* Copy as many bytes as will fit */
           48         if (n != 0 && --n != 0) {
           49                 do {
           50                         if ((*d++ = *s++) == 0)
           51                                 break;
           52                 } while (--n != 0);
           53         }
           54 
           55         /* Not enough room in dst, add NUL and traverse rest of src */
           56         if (n == 0) {
           57                 if (siz != 0)
           58                         *d = '\0';                /* NUL-terminate dst */
           59                 while (*s++)
           60                         ;
           61         }
           62 
           63         return(s - src - 1);        /* count does not include NUL */
           64 }