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      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 
     49 extern	char **environ;
     50 
     51 static int prefix(char *cp, char *dp);
     52 
     53 int
     54 main(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 
     78 static int
     79 prefix(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