Merge from vendor branch BINUTILS:
[dragonfly.git] / libexec / revnetgroup / revnetgroup.c
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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
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37 *
38 * $FreeBSD: src/libexec/revnetgroup/revnetgroup.c,v 1.10.2.1 2000/07/20 10:35:08 kris Exp $
39 * $DragonFly: src/libexec/revnetgroup/revnetgroup.c,v 1.2 2003/06/17 04:27:07 dillon Exp $
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40 */
41
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42#include <err.h>
43#include <stdio.h>
44#include <stdlib.h>
45#include <string.h>
46#include <unistd.h>
47#include "hash.h"
48
49/* Default location of netgroup file. */
50char *netgroup = "/etc/netgroup";
51
52/* Stored hash table version of 'forward' netgroup database. */
53struct group_entry *gtable[TABLESIZE];
54
55/*
56 * Stored hash table of 'reverse' netgroup member database
57 * which we will construct.
58 */
59struct member_entry *mtable[TABLESIZE];
60
61static void
62usage()
63{
64 fprintf (stderr,"usage: revnetgroup -u|-h [-f netgroup file]\n");
65 exit(1);
66}
67
68int
69main(argc, argv)
70 int argc;
71 char *argv[];
72{
73 FILE *fp;
74 char readbuf[LINSIZ];
75 struct group_entry *gcur;
76 struct member_entry *mcur;
77 char *host, *user, *domain;
78 int ch;
79 char *key = NULL, *data = NULL;
80 int hosts = -1, i;
81
82 if (argc < 2)
83 usage();
84
85 while ((ch = getopt(argc, argv, "uhf:")) != -1) {
86 switch(ch) {
87 case 'u':
88 if (hosts != -1) {
89 warnx("please use only one of -u or -h");
90 usage();
91 }
92 hosts = 0;
93 break;
94 case 'h':
95 if (hosts != -1) {
96 warnx("please use only one of -u or -h");
97 usage();
98 }
99 hosts = 1;
100 break;
101 case 'f':
102 netgroup = optarg;
103 break;
104 default:
105 usage();
106 break;
107 }
108 }
109
110 if (hosts == -1)
111 usage();
112
113 if (strcmp(netgroup, "-")) {
114 if ((fp = fopen(netgroup, "r")) == NULL) {
115 err(1, "%s", netgroup);
116 }
117 } else {
118 fp = stdin;
119 }
120
121 /* Stuff all the netgroup names and members into a hash table. */
122 while (fgets(readbuf, LINSIZ, fp)) {
123 if (readbuf[0] == '#')
124 continue;
125 /* handle backslash line continuations */
126 while(readbuf[strlen(readbuf) - 2] == '\\') {
127 fgets((char *)&readbuf[strlen(readbuf) - 2],
128 sizeof(readbuf) - strlen(readbuf), fp);
129 }
130 data = NULL;
131 if ((data = (char *)(strpbrk(readbuf, " \t") + 1)) < (char *)2)
132 continue;
133 key = (char *)&readbuf;
134 *(data - 1) = '\0';
135 store(gtable, key, data);
136 }
137
138 fclose(fp);
139
140 /*
141 * Find all members of each netgroup and keep track of which
142 * group they belong to.
143 */
144 for (i = 0; i < TABLESIZE; i++) {
145 gcur = gtable[i];
146 while(gcur) {
147 __setnetgrent(gcur->key);
148 while(__getnetgrent(&host, &user, &domain) != 0) {
149 if (hosts ? host && strcmp(host,"-") : user && strcmp(user, "-"))
150 mstore(mtable, hosts ? host : user, gcur->key, domain);
151 }
152 gcur = gcur->next;
153 }
154 }
155
156 /* Release resources used by the netgroup parser code. */
157 __endnetgrent();
158
159 /* Spew out the results. */
160 for (i = 0; i < TABLESIZE; i++) {
161 mcur = mtable[i];
162 while(mcur) {
163 struct grouplist *tmp;
164 printf ("%s.%s\t", mcur->key, mcur->domain);
165 tmp = mcur->groups;
166 while(tmp) {
167 printf ("%s", tmp->groupname);
168 tmp = tmp->next;
169 if (tmp)
170 printf(",");
171 }
172 mcur = mcur->next;
173 printf ("\n");
174 }
175 }
176
177 /* Let the OS free all our resources. */
178 exit(0);
179}