1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26/*	Copyright (c) 1988 AT&T	*/
27/*	  All Rights Reserved  	*/
28
29#include "lint.h"
30#include <string.h>
31#include <sys/types.h>
32
33/*
34 * Copy s2 to s1, truncating or null-padding to always copy n bytes
35 * return a pointer to the terminating null byte in s1, or,
36 * if s1 is not null-terminated, s1 + n.
37 */
38char *
39stpncpy(char *_RESTRICT_KYWD s1, const char *_RESTRICT_KYWD s2, size_t n)
40{
41	size_t len = strnlen(s2, n);
42
43	(void) strncpy(s1, s2, n);
44
45	return ((len < n) ? s1 + len : s1 + n);
46}
47