1 /*	$NetBSD: revnetgroup.c,v 1.9 2001/02/19 23:22:51 cgd Exp $ */
2 
3 /*
4  * Copyright (c) 1995
5  *	Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
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.
18  * 4. Neither the name of the author nor the names of any co-contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  *
34  * reverse netgroup map generator program
35  *
36  * Written by Bill Paul <wpaul@ctr.columbia.edu>
37  * Center for Telecommunications Research
38  * Columbia University, New York City
39  *
40  */
41 
42 #include <sys/cdefs.h>
43 #ifndef lint
44 __RCSID("$NetBSD: revnetgroup.c,v 1.9 2001/02/19 23:22:51 cgd Exp $");
45 #endif
46 
47 #include <ctype.h>
48 #include <err.h>
49 #include <errno.h>
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <string.h>
53 #include <unistd.h>
54 #include <util.h>
55 
56 #include "hash.h"
57 #include "protos.h"
58 
59 int	main __P((int, char *[]));
60 void	usage __P((void));
61 
62 
63 
64 /* Default location of netgroup file. */
65 char *netgroup = "/etc/netgroup";
66 
67 /* Stored hash table version of 'forward' netgroup database. */
68 struct group_entry *gtable[TABLESIZE];
69 
70 /*
71  * Stored hash table of 'reverse' netgroup member database
72  * which we will construct.
73  */
74 struct member_entry *mtable[TABLESIZE];
75 
76 void
77 usage()
78 {
79 
80 	fprintf (stderr,"usage: %s -u|-h [-f netgroup file]\n", getprogname());
81 	exit(1);
82 }
83 
84 int
85 main(argc, argv)
86 	int argc;
87 	char *argv[];
88 {
89 	struct group_entry *gcur;
90 	struct member_entry *mcur;
91 	FILE	*fp;
92 	char	*line, *p, *host, *user, *domain;
93 	int	 ch, i;
94 	size_t	 len;
95 	char	*key;
96 	int	 hosts = -1;
97 
98 	if (argc < 2)
99 		usage();
100 
101 	while ((ch = getopt(argc, argv, "uhf:")) != -1) {
102 		switch(ch) {
103 		case 'u':
104 			if (hosts != -1) {
105 				warnx("please use only one of -u or -h");
106 				usage();
107 			}
108 			hosts = 0;
109 			break;
110 		case 'h':
111 			if (hosts != -1) {
112 				warnx("please use only one of -u or -h");
113 				usage();
114 			}
115 			hosts = 1;
116 			break;
117 		case 'f':
118 			netgroup = optarg;
119 			break;
120 		default:
121 			usage();
122 			break;
123 		}
124 	}
125 
126 	if (hosts == -1)
127 		usage();
128 
129 	if (strcmp(netgroup, "-")) {
130 		if ((fp = fopen(netgroup, "r")) == NULL) {
131 			err(1, "%s", netgroup);
132 		}
133 	} else {
134 		fp = stdin;
135 	}
136 
137 	/* Stuff all the netgroup names and members into a hash table. */
138 	for (;
139 	    (line = fparseln(fp, &len, NULL, NULL, FPARSELN_UNESCALL));
140 	    free(line)) {
141 		if (len == 0)
142 			continue;
143 		p = line;
144 
145 		for (key = p; *p && isspace(*p) == 0; p++)
146 			;
147 		while (*p && isspace(*p))
148 			*p++ = '\0';
149 		store(gtable, key, p);
150 	}
151 
152 	fclose(fp);
153 
154 	/*
155 	 * Find all members of each netgroup and keep track of which
156 	 * group they belong to.
157 	 */
158 	for (i = 0; i < TABLESIZE; i++) {
159 		gcur = gtable[i];
160 		while(gcur) {
161 			rng_setnetgrent(gcur->key);
162 			while(rng_getnetgrent(&host, &user, &domain) != NULL) {
163 				if (hosts) {
164 					if (!(host && !strcmp(host,"-"))) {
165 						mstore(mtable,
166 						       host ? host : "*",
167 						       gcur->key,
168 						       domain ? domain : "*");
169 					}
170 				} else {
171 					if (!(user && !strcmp(user,"-"))) {
172 						mstore(mtable,
173 						       user ? user : "*",
174 						       gcur->key,
175 						       domain ? domain : "*");
176 					}
177 				}
178 			}
179 			gcur = gcur->next;
180 		}
181 	}
182 
183 	/* Release resources used by the netgroup parser code. */
184 	rng_endnetgrent();
185 
186 	/* Spew out the results. */
187 	for (i = 0; i < TABLESIZE; i++) {
188 		mcur = mtable[i];
189 		while(mcur) {
190 			struct grouplist *tmp;
191 			printf ("%s.%s\t", mcur->key, mcur->domain);
192 			tmp = mcur->groups;
193 			while(tmp) {
194 				printf ("%s", tmp->groupname);
195 				tmp = tmp->next;
196 				if (tmp)
197 					printf(",");
198 			}
199 			mcur = mcur->next;
200 			printf ("\n");
201 		}
202 	}
203 
204 	/* Let the OS free all our resources. */
205 	exit(0);
206 }
207