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 #include "lint.h"
27 #include <string.h>
28 #include <stdlib.h>
29 #include <sys/types.h>
30
31 /*
32 * Create a copy of string s, but only duplicate the first n bytes.
33 * Return NULL if the new string can't be allocated.
34 */
35 char *
strndup(const char * s1,size_t n)36 strndup(const char *s1, size_t n)
37 {
38 char *s2;
39
40 n = strnlen(s1, n);
41 if ((s2 = malloc(n + 1)) != NULL)
42 (void) strlcpy(s2, s1, n + 1);
43 return (s2);
44 }
45