1 /*	$NetBSD: revnetgroup.c,v 1.11 2002/11/30 03:10:59 lukem 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 1.11 2002/11/30 03:10:59 lukem 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 
55 #include "hash.h"
56 #include "protos.h"
57 
58 int	main(int, char *[]);
59 void	usage(void);
60 
61 
62 
63 /* Default location of netgroup file. */
64 char *netgroup = "/etc/netgroup";
65 
66 /* Stored hash table version of 'forward' netgroup database. */
67 struct group_entry *gtable[TABLESIZE];
68 
69 /*
70  * Stored hash table of 'reverse' netgroup member database
71  * which we will construct.
72  */
73 struct member_entry *mtable[TABLESIZE];
74 
75 void
76 usage(void)
77 {
78 
79 	fprintf (stderr,"usage: %s -u|-h [-f netgroup file]\n", getprogname());
80 	exit(1);
81 }
82 
83 int
84 main(int argc, char *argv[])
85 {
86 	struct group_entry *gcur;
87 	struct member_entry *mcur;
88 	FILE	*fp;
89 	char	*line, *p, *host, *user, *domain;
90 	int	 ch, i;
91 	size_t	 len;
92 	char	*key;
93 	int	 hosts = -1;
94 
95 	if (argc < 2)
96 		usage();
97 
98 	while ((ch = getopt(argc, argv, "uhf:")) != -1) {
99 		switch(ch) {
100 		case 'u':
101 			if (hosts != -1) {
102 				warnx("please use only one of -u or -h");
103 				usage();
104 			}
105 			hosts = 0;
106 			break;
107 		case 'h':
108 			if (hosts != -1) {
109 				warnx("please use only one of -u or -h");
110 				usage();
111 			}
112 			hosts = 1;
113 			break;
114 		case 'f':
115 			netgroup = optarg;
116 			break;
117 		default:
118 			usage();
119 			break;
120 		}
121 	}
122 
123 	if (hosts == -1)
124 		usage();
125 
126 	if (strcmp(netgroup, "-")) {
127 		if ((fp = fopen(netgroup, "r")) == NULL) {
128 			err(1, "%s", netgroup);
129 		}
130 	} else {
131 		fp = stdin;
132 	}
133 
134 	/* Stuff all the netgroup names and members into a hash table. */
135 	for (;
136 	    (line = fparseln(fp, &len, NULL, NULL, FPARSELN_UNESCALL));
137 	    free(line)) {
138 		if (len == 0)
139 			continue;
140 		p = line;
141 
142 		for (key = p; *p && isspace(*p) == 0; p++)
143 			;
144 		while (*p && isspace(*p))
145 			*p++ = '\0';
146 		store(gtable, key, p);
147 	}
148 
149 	fclose(fp);
150 
151 	/*
152 	 * Find all members of each netgroup and keep track of which
153 	 * group they belong to.
154 	 */
155 	for (i = 0; i < TABLESIZE; i++) {
156 		gcur = gtable[i];
157 		while(gcur) {
158 			rng_setnetgrent(gcur->key);
159 			while(rng_getnetgrent(&host, &user, &domain) != NULL) {
160 				if (hosts) {
161 					if (!(host && !strcmp(host,"-"))) {
162 						mstore(mtable,
163 						       host ? host : "*",
164 						       gcur->key,
165 						       domain ? domain : "*");
166 					}
167 				} else {
168 					if (!(user && !strcmp(user,"-"))) {
169 						mstore(mtable,
170 						       user ? user : "*",
171 						       gcur->key,
172 						       domain ? domain : "*");
173 					}
174 				}
175 			}
176 			gcur = gcur->next;
177 		}
178 	}
179 
180 	/* Release resources used by the netgroup parser code. */
181 	rng_endnetgrent();
182 
183 	/* Spew out the results. */
184 	for (i = 0; i < TABLESIZE; i++) {
185 		mcur = mtable[i];
186 		while(mcur) {
187 			struct grouplist *tmp;
188 			printf ("%s.%s\t", mcur->key, mcur->domain);
189 			tmp = mcur->groups;
190 			while(tmp) {
191 				printf ("%s", tmp->groupname);
192 				tmp = tmp->next;
193 				if (tmp)
194 					printf(",");
195 			}
196 			mcur = mcur->next;
197 			printf ("\n");
198 		}
199 	}
200 
201 	/* Let the OS free all our resources. */
202 	exit(0);
203 }
204