mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
71 lines
2.5 KiB
C
71 lines
2.5 KiB
C
/* $OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char *rcsid = "$OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp $");
|
|
#endif /* LIBC_SCCS and not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <string.h>
|
|
|
|
/*
|
|
* Copy src to string dst of size siz. At most siz-1 characters
|
|
* will be copied. Always NUL terminates (unless siz == 0).
|
|
* Returns strlen(src); if retval >= siz, truncation occurred.
|
|
*/
|
|
size_t strlcpy(dst, src, siz)
|
|
char *dst;
|
|
const char *src;
|
|
size_t siz;
|
|
{
|
|
register char *d = dst;
|
|
register const char *s = src;
|
|
register size_t n = siz;
|
|
|
|
/* Copy as many bytes as will fit */
|
|
if (n != 0 && --n != 0) {
|
|
do {
|
|
if ((*d++ = *s++) == 0)
|
|
break;
|
|
} while (--n != 0);
|
|
}
|
|
|
|
/* Not enough room in dst, add NUL and traverse rest of src */
|
|
if (n == 0) {
|
|
if (siz != 0)
|
|
*d = '\0'; /* NUL-terminate dst */
|
|
while (*s++)
|
|
;
|
|
}
|
|
|
|
return(s - src - 1); /* count does not include NUL */
|
|
}
|