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, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 /*
30 * Get matching substring
31 */
32 #include <string.h>
33
34 #pragma weak strstr = _strstr
35
36 char *
_strstr(s1,s2)37 _strstr(s1, s2)
38 register char *s1, *s2;
39 {
40 int s2len = strlen(s2); /* length of the second string */
41 /*
42 * If the length of the second string is 0,
43 * return the first argument.
44 */
45 if (s2len == 0)
46 return (s1);
47
48 while (strlen(s1) >= s2len) {
49 if (strncmp(s1, s2, s2len) == 0)
50 return (s1);
51 s1++;
52 }
53 return (0);
54 }
55