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netgroup.c revision 1.4 
      1 /*	$NetBSD: netgroup.c,v 1.4 2004/01/05 23:23:36 jmmv 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 __RCSID("$NetBSD: netgroup.c,v 1.4 2004/01/05 23:23:36 jmmv Exp $");
     41 
     42 #include <stdio.h>
     43 #include <stdlib.h>
     44 #include <unistd.h>
     45 #include <netgroup.h>
     46 
     47 static void usage __P((void)) __attribute__((__noreturn__));
     48 int main __P((int, char *[]));
     49 
     50 static void
     51 usage()
     52 {
     53 
     54 	(void)fprintf(stderr, "usage: %s [-hud] <netgroup>\n", getprogname());
     55 	exit(1);
     56 }
     57 
     58 int
     59 main(argc, argv)
     60 	int argc;
     61 	char *argv[];
     62 {
     63 	int c, i = 0;
     64 	const char *p[3];
     65 
     66 	while ((c = getopt(argc, argv, "hud")) != -1)
     67 		switch (c) {
     68 		case 'h':
     69 			i = 0;
     70 			break;
     71 		case 'u':
     72 			i = 1;
     73 			break;
     74 		case 'd':
     75 			i = 2;
     76 			break;
     77 		default:
     78 			usage();
     79 		}
     80 
     81 	if (optind >= argc)
     82 		usage();
     83 
     84 	for(; optind < argc; optind++) {
     85 		setnetgrent(argv[optind]);
     86 		while (getnetgrent(&p[0], &p[1], &p[2]))
     87 			if (p[i])
     88 				printf("%s\n", p[i]);
     89 		endnetgrent();
     90 	}
     91 	return 0;
     92 }
     93