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/*
24 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
25 * Use is subject to license terms.
26 */
27
28/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
29/*	  All Rights Reserved  	*/
30
31/*
32 * University Copyright- Copyright (c) 1982, 1986, 1988
33 * The Regents of the University of California
34 * All Rights Reserved
35 *
36 * University Acknowledgment- Portions of this document are derived from
37 * software developed by the University of California, Berkeley, and its
38 * contributors.
39 */
40
41#pragma ident	"%Z%%M%	%I%	%E% SMI"
42
43/*
44 * printenv
45 */
46
47#include <stdio.h>
48
49extern	char **environ;
50
51static int prefix(char *cp, char *dp);
52
53int
54main(int argc, char *argv[])
55{
56	char **ep;
57	int found = 0;
58
59	argc--, argv++;
60
61	if (environ)
62		for (ep = environ; *ep; ep++)
63			if (argc == 0 || prefix(argv[0], *ep)) {
64				char *cp = *ep;
65
66				found++;
67				if (argc) {
68					while (*cp && *cp != '=')
69						cp++;
70					if (*cp == '=')
71						cp++;
72				}
73				(void) printf("%s\n", cp);
74			}
75	return (!found);
76}
77
78static int
79prefix(char *cp, char *dp)
80{
81
82	while (*cp && *dp && *cp == *dp)
83		cp++, dp++;
84	if (*cp == 0)
85		return (*dp == '=');
86	return (0);
87}
88