1/*
2 * Copyright (c) 1995
3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * reverse netgroup map generator program
33 *
34 * Written by Bill Paul <wpaul@ctr.columbia.edu>
35 * Center for Telecommunications Research
36 * Columbia University, New York City
37 *
38 * $Id: revnetgroup.c,v 1.7 1997/03/28 15:48:15 imp Exp $
39 */
40
41#include <stdio.h>
42#include <stdlib.h>
43#include <string.h>
44#include <errno.h>
45#include <err.h>
46#include "hash.h"
47
48#ifndef lint
49static const char rcsid[] = "$Id: revnetgroup.c,v 1.7 1997/03/28 15:48:15 imp Exp $";
50#endif
51
52/* Default location of netgroup file. */
53char *netgroup = "/etc/netgroup";
54
55/* Stored hash table version of 'forward' netgroup database. */
56struct group_entry *gtable[TABLESIZE];
57
58/*
59 * Stored hash table of 'reverse' netgroup member database
60 * which we will construct.
61 */
62struct member_entry *mtable[TABLESIZE];
63
64void usage(prog)
65char *prog;
66{
67 fprintf (stderr,"usage: %s -u|-h [-f netgroup file]\n",prog);
68 exit(1);
69}
70
71extern char *optarg;
72
73int
74main(argc, argv)
75 int argc;
76 char *argv[];
77{
78 FILE *fp;
79 char readbuf[LINSIZ];
80 struct group_entry *gcur;
81 struct member_entry *mcur;
82 char *host, *user, *domain;
83 int ch;
84 char *key = NULL, *data = NULL;
85 int hosts = -1, i;
86
87 if (argc < 2)
88 usage(argv[0]);
89
90 while ((ch = getopt(argc, argv, "uhf:")) != -1) {
91 switch(ch) {
92 case 'u':
93 if (hosts != -1) {
94 warnx("please use only one of -u or -h");
95 usage(argv[0]);
96 }
97 hosts = 0;
98 break;
99 case 'h':
100 if (hosts != -1) {
101 warnx("please use only one of -u or -h");
102 usage(argv[0]);
103 }
104 hosts = 1;
105 break;
106 case 'f':
107 netgroup = optarg;
108 break;
109 default:
110 usage(argv[0]);
111 break;
112 }
113 }
114
115 if (hosts == -1)
116 usage(argv[0]);
117
118 if (strcmp(netgroup, "-")) {
119 if ((fp = fopen(netgroup, "r")) == NULL) {
120 err(1,netgroup);
121 }
122 } else {
123 fp = stdin;
124 }
125
126 /* Stuff all the netgroup names and members into a hash table. */
127 while (fgets(readbuf, LINSIZ, fp)) {
128 if (readbuf[0] == '#')
129 continue;
130 /* handle backslash line continuations */
131 while(readbuf[strlen(readbuf) - 2] == '\\') {
132 fgets((char *)&readbuf[strlen(readbuf) - 2],
133 sizeof(readbuf) - strlen(readbuf), fp);
134 }
135 data = NULL;
136 if ((data = (char *)(strpbrk(readbuf, " \t") + 1)) < (char *)2)
137 continue;
138 key = (char *)&readbuf;
139 *(data - 1) = '\0';
140 store(gtable, key, data);
141 }
142
143 fclose(fp);
144
145 /*
146 * Find all members of each netgroup and keep track of which
147 * group they belong to.
148 */
149 for (i = 0; i < TABLESIZE; i++) {
150 gcur = gtable[i];
151 while(gcur) {
152 __setnetgrent(gcur->key);
153 while(__getnetgrent(&host, &user, &domain) != 0) {
154 if (hosts ? host && strcmp(host,"-") : user && strcmp(user, "-"))
155 mstore(mtable, hosts ? host : user, gcur->key, domain);
156 }
157 gcur = gcur->next;
158 }
159 }
160
161 /* Release resources used by the netgroup parser code. */
162 __endnetgrent();
163
164 /* Spew out the results. */
165 for (i = 0; i < TABLESIZE; i++) {
166 mcur = mtable[i];
167 while(mcur) {
168 struct grouplist *tmp;
169 printf ("%s.%s\t", mcur->key, mcur->domain);
170 tmp = mcur->groups;
171 while(tmp) {
172 printf ("%s", tmp->groupname);
173 tmp = tmp->next;
174 if (tmp)
175 printf(",");
176 }
177 mcur = mcur->next;
178 printf ("\n");
179 }
180 }
181
182 /* Let the OS free all our resources. */
183 exit(0);
184}