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      1 /*	$NetBSD: netgroup.c,v 1.9 2016/09/03 05:58:30 dholland Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __RCSID("$NetBSD: netgroup.c,v 1.9 2016/09/03 05:58:30 dholland Exp $");
     34 
     35 #include <stdio.h>
     36 #include <stdlib.h>
     37 #include <unistd.h>
     38 #include <netgroup.h>
     39 
     40 static __dead void
     41 usage(void)
     42 {
     43 
     44 	(void)fprintf(stderr, "usage: %s [-hud] <netgroup>\n", getprogname());
     45 	exit(1);
     46 }
     47 
     48 int
     49 main(int argc, char *argv[])
     50 {
     51 	int c, i = 0;
     52 	const char *p[3];
     53 
     54 	while ((c = getopt(argc, argv, "hud")) != -1)
     55 		switch (c) {
     56 		case 'h':
     57 			i = 0;
     58 			break;
     59 		case 'u':
     60 			i = 1;
     61 			break;
     62 		case 'd':
     63 			i = 2;
     64 			break;
     65 		default:
     66 			usage();
     67 		}
     68 
     69 	if (optind >= argc)
     70 		usage();
     71 
     72 	for(; optind < argc; optind++) {
     73 		setnetgrent(argv[optind]);
     74 		while (getnetgrent(&p[0], &p[1], &p[2]))
     75 			if (p[i])
     76 				printf("%s\n", p[i]);
     77 		endnetgrent();
     78 	}
     79 	return 0;
     80 }
     81