2 * SPDX-License-Identifier: BSD-4-Clause
5 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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11 * notice, this list of conditions and the following disclaimer.
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14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Bill Paul.
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19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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34 * reverse netgroup map generator program
36 * Written by Bill Paul <wpaul@ctr.columbia.edu>
37 * Center for Telecommunications Research
38 * Columbia University, New York City
42 static const char rcsid[] =
53 /* Default location of netgroup file. */
54 char *netgroup = "/etc/netgroup";
56 /* Stored hash table version of 'forward' netgroup database. */
57 struct group_entry *gtable[TABLESIZE];
60 * Stored hash table of 'reverse' netgroup member database
61 * which we will construct.
63 struct member_entry *mtable[TABLESIZE];
68 fprintf (stderr,"usage: revnetgroup -u | -h [-f netgroup_file]\n");
73 main(int argc, char *argv[])
77 struct group_entry *gcur;
78 struct member_entry *mcur;
79 char *host, *user, *domain;
81 char *key = NULL, *data = NULL;
87 while ((ch = getopt(argc, argv, "uhf:")) != -1) {
91 warnx("please use only one of -u or -h");
98 warnx("please use only one of -u or -h");
115 if (strcmp(netgroup, "-")) {
116 if ((fp = fopen(netgroup, "r")) == NULL) {
117 err(1, "%s", netgroup);
123 /* Stuff all the netgroup names and members into a hash table. */
124 while (fgets(readbuf, LINSIZ, fp)) {
125 if (readbuf[0] == '#')
127 /* handle backslash line continuations */
128 while(readbuf[strlen(readbuf) - 2] == '\\') {
129 fgets((char *)&readbuf[strlen(readbuf) - 2],
130 sizeof(readbuf) - strlen(readbuf), fp);
133 if ((data = (char *)(strpbrk(readbuf, " \t") + 1)) < (char *)2)
135 key = (char *)&readbuf;
137 store(gtable, key, data);
143 * Find all members of each netgroup and keep track of which
144 * group they belong to.
146 for (i = 0; i < TABLESIZE; i++) {
149 __setnetgrent(gcur->key);
150 while(__getnetgrent(&host, &user, &domain) != 0) {
151 if (hosts ? host && strcmp(host,"-") : user && strcmp(user, "-"))
152 mstore(mtable, hosts ? host : user, gcur->key, domain);
158 /* Release resources used by the netgroup parser code. */
161 /* Spew out the results. */
162 for (i = 0; i < TABLESIZE; i++) {
165 struct grouplist *tmp;
166 printf ("%s.%s\t", mcur->key, mcur->domain);
169 printf ("%s", tmp->groupname);
179 /* Let the OS free all our resources. */