stpncpy.c revision 23a1ccea6aac035f084a7a4cdc968687d1b02daf
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#include "lint.h"
#include <string.h>
#include <sys/types.h>
/*
* Copy s2 to s1, truncating or null-padding to always copy n bytes
* return a pointer to the terminating null byte in s1, or,
* if s1 is not null-terminated, s1 + n.
*/
char *
stpncpy(char *_RESTRICT_KYWD s1, const char *_RESTRICT_KYWD s2, size_t n)
{
size_t len = strnlen(s2, n);
(void) strncpy(s1, s2, n);
return ((len < n) ? s1 + len : s1 + n);
}