/*      $NetBSD: netgroup.c,v 1.9 2016/09/03 05:58:30 dholland Exp $    */

/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#include <sys/cdefs.h>
__RCSID("$NetBSD: netgroup.c,v 1.9 2016/09/03 05:58:30 dholland Exp $");

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <netgroup.h>

static __dead void
usage(void)
{

       (void)fprintf(stderr, "usage: %s [-hud] <netgroup>\n", getprogname());
       exit(1);
}

int
main(int argc, char *argv[])
{
       int c, i = 0;
       const char *p[3];

       while ((c = getopt(argc, argv, "hud")) != -1)
               switch (c) {
               case 'h':
                       i = 0;
                       break;
               case 'u':
                       i = 1;
                       break;
               case 'd':
                       i = 2;
                       break;
               default:
                       usage();
               }

       if (optind >= argc)
               usage();

       for(; optind < argc; optind++) {
               setnetgrent(argv[optind]);
               while (getnetgrent(&p[0], &p[1], &p[2]))
                       if (p[i])
                               printf("%s\n", p[i]);
               endnetgrent();
       }
       return 0;
}