| 1 |
9 |
jlechner |
/* $OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt 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 |
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
| 31 |
|
|
static char *rcsid = "$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $";
|
| 32 |
|
|
#endif /* LIBC_SCCS and not lint */
|
| 33 |
|
|
|
| 34 |
|
|
#include <sys/types.h>
|
| 35 |
|
|
#include <string.h>
|
| 36 |
|
|
|
| 37 |
|
|
/*
|
| 38 |
|
|
* Copy src to string dst of size siz. At most siz-1 characters
|
| 39 |
|
|
* will be copied. Always NUL terminates (unless siz == 0).
|
| 40 |
|
|
* Returns strlen(src); if retval >= siz, truncation occurred.
|
| 41 |
|
|
*/
|
| 42 |
|
|
size_t
|
| 43 |
|
|
_DEFUN (strlcpy, (dst, src, siz),
|
| 44 |
|
|
char *dst _AND
|
| 45 |
|
|
_CONST char *src _AND
|
| 46 |
|
|
size_t siz)
|
| 47 |
|
|
{
|
| 48 |
|
|
register char *d = dst;
|
| 49 |
|
|
register const char *s = src;
|
| 50 |
|
|
register size_t n = siz;
|
| 51 |
|
|
|
| 52 |
|
|
/* Copy as many bytes as will fit */
|
| 53 |
|
|
if (n != 0 && --n != 0) {
|
| 54 |
|
|
do {
|
| 55 |
|
|
if ((*d++ = *s++) == 0)
|
| 56 |
|
|
break;
|
| 57 |
|
|
} while (--n != 0);
|
| 58 |
|
|
}
|
| 59 |
|
|
|
| 60 |
|
|
/* Not enough room in dst, add NUL and traverse rest of src */
|
| 61 |
|
|
if (n == 0) {
|
| 62 |
|
|
if (siz != 0)
|
| 63 |
|
|
*d = '\0'; /* NUL-terminate dst */
|
| 64 |
|
|
while (*s++)
|
| 65 |
|
|
;
|
| 66 |
|
|
}
|
| 67 |
|
|
|
| 68 |
|
|
return(s - src - 1); /* count does not include NUL */
|
| 69 |
|
|
}
|
| 70 |
|
|
|
