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 /*
42 * printenv
43 */
44
45 #include <stdio.h>
46
47 extern char **environ;
48
49 static int prefix(char *cp, char *dp);
50
51 int
main(int argc,char * argv[])52 main(int argc, char *argv[])
53 {
54 char **ep;
55 int found = 0;
56
57 argc--, argv++;
58
59 if (environ)
60 for (ep = environ; *ep; ep++)
61 if (argc == 0 || prefix(argv[0], *ep)) {
62 char *cp = *ep;
63
64 found++;
65 if (argc) {
66 while (*cp && *cp != '=')
67 cp++;
68 if (*cp == '=')
69 cp++;
70 }
71 (void) printf("%s\n", cp);
72 }
73 return (!found);
74 }
75
76 static int
prefix(char * cp,char * dp)77 prefix(char *cp, char *dp)
78 {
79
80 while (*cp && *dp && *cp == *dp)
81 cp++, dp++;
82 if (*cp == 0)
83 return (*dp == '=');
84 return (0);
85 }
86