1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 1990, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26 /*
27 * For SUNWnskit - version 1.1
28 */
29
30 #include <stdlib.h>
31 #include <unistd.h>
32 #include <string.h>
33 #include <stdio.h>
34 #include <ctype.h>
35 #include <pwd.h>
36 #include <rpcsvc/ypclnt.h>
37 #include "util.h"
38 #include "table.h"
39 #include "getgroup.h"
40
41 #define MAXDOMAINLEN 256
42 #define MAXGROUPLEN 1024
43
44 /*
45 * Reverse the netgroup file. A flag of "-u" means reverse by username,
46 * one of "-h" means reverse by hostname. Each line in the output file
47 * will begin with a key formed by concatenating the host or user name
48 * with the domain name. The key will be followed by a tab, then the
49 * comma-separated, newline-terminated list of groups to which the
50 * user or host belongs.
51 *
52 * Exception: Groups to which everyone belongs (universal groups) will
53 * not be included in the list. The universal groups will be listed under
54 * the special name "*".
55 *
56 * Thus to find out all the groups that user "foo" of domain "bar" is in,
57 * lookup the groups under foo.bar, foo.*, *.bar and *.*.
58 *
59 */
60
61
62
63 /* Stores a list of strings */
64 typedef struct stringnode *stringlist;
65 struct stringnode {
66 char *str;
67 stringlist next;
68 };
69 typedef struct stringnode stringnode;
70
71
72
73 /* Stores a list of (name,list-of-groups) */
74 typedef struct groupentrynode *groupentrylist;
75 struct groupentrynode {
76 char *name;
77 stringlist groups;
78 groupentrylist next;
79 };
80 typedef struct groupentrynode groupentrynode;
81
82 stringtable ngtable;
83
84 static groupentrylist grouptable[TABLESIZE];
85
86 static char *nextgroup(void);
87 static void storegroup(char *group, struct grouplist *glist, int byuser);
88 static void enter(char *name, char *group);
89 static void appendgroup(groupentrylist grlist, char *group);
90 static groupentrylist newentry(char *name, char *group);
91 static void loadtable(FILE *nf);
92 static void dumptable(void);
93
94 int
95 main(argc, argv)
96 int argc;
97 char *argv[];
98 {
99 char *group;
100 struct grouplist *glist;
101 int byuser;
102
103 loadtable(stdin);
104 if (argc == 2 && argv[1][0] == '-' &&
105 (argv[1][1] == 'u' || argv[1][1] == 'h')) {
106 byuser = (argv[1][1] == 'u');
107 } else {
108 (void) fprintf(stderr,
109 "usage: %s -h (by host), %s -u (by user)\n",
110 argv[0], argv[0]);
111 exit(1);
112 }
113
114 while (group = nextgroup()) {
115 glist = my_getgroup(group);
116 storegroup(group, glist, byuser);
117 }
118 dumptable();
119
120 return (0);
121 }
122
123 /*
124 * Get the next netgroup from /etc/netgroup
125 */
126 static char *
127 nextgroup(void)
128 {
129 static int index = -1;
130 static tablelist cur = NULL;
131 char *group;
132
133 while (cur == NULL) {
134 if (++index == TABLESIZE) {
135 return (NULL);
136 }
137 cur = ngtable[index];
138 }
139 group = cur->key;
140 cur = cur->next;
141 return (group);
142 }
143
144
145
146 /*
147 * Dump out all of the stored info into a file
148 */
149 static void
150 dumptable(void)
151 {
152 int i;
153 groupentrylist entry;
154 stringlist groups;
155
156 for (i = 0; i < TABLESIZE; i++) {
157 if (entry = grouptable[i]) {
158 while (entry) {
159 fputs(entry->name, stdout);
160 putc('\t', stdout);
161 for (groups = entry->groups; groups;
162 groups = groups->next) {
163 fputs(groups->str, stdout);
164 if (groups->next) {
165 putc(',', stdout);
166 }
167 }
168 putc('\n', stdout);
169 entry = entry->next;
170 }
171 }
172 }
173 }
174
175
176
177
178 /*
179 * Add a netgroup to a user's list of netgroups
180 */
181 static void
182 storegroup(char *group, struct grouplist *glist, int byuser)
183 {
184 char *name; /* username or hostname */
185 char *domain;
186 char *key;
187 static char *universal = "*";
188
189 for (; glist; glist = glist->gl_nxt) {
190 name = byuser ? glist->gl_name : glist->gl_machine;
191 if (!name) {
192 name = universal;
193 } else if (!isalnum(*name) && *name != '_') {
194 continue;
195 }
196 domain = glist->gl_domain;
197 if (!domain) {
198 domain = universal;
199 }
200 key = malloc((unsigned) (strlen(name)+strlen(domain)+2));
201 (void) sprintf(key, "%s.%s", name, domain);
202 enter(key, group);
203 }
204 }
205
206
207
208 static groupentrylist
209 newentry(char *name, char *group)
210 {
211 groupentrylist new;
212
213 new = MALLOC(groupentrynode);
214
215 STRCPY(new->name, name);
216
217 new->groups = MALLOC(stringnode);
218 new->groups->str = group;
219 new->groups->next = NULL;
220
221 new->next = NULL;
222 return (new);
223 }
224
225 static void
226 appendgroup(groupentrylist grlist, char *group)
227 {
228 stringlist cur, prev;
229
230 for (cur = grlist->groups; cur; prev = cur, cur = cur->next) {
231 if (strcmp(group, cur->str) == 0) {
232 return;
233 }
234 }
235 prev->next = MALLOC(stringnode);
236 cur = prev->next;
237 cur->str = group;
238 cur->next = NULL;
239 }
240
241 static void
242 enter(char *name, char *group)
243 {
244 int key;
245 groupentrylist gel;
246 groupentrylist gelprev;
247
248 key = tablekey(name);
249 if (grouptable[key] == NULL) {
250 grouptable[key] = newentry(name, group);
251 } else {
252 gel = grouptable[key];
253 while (gel && strcmp(gel->name, name)) {
254 gelprev = gel;
255 gel = gel->next;
256 }
257 if (gel) {
258 appendgroup(gel, group);
259 } else {
260 gelprev->next = newentry(name, group);
261 }
262 }
263 }
264
265 /*
266 * Load up a hash table with the info in /etc/netgroup
267 */
268 static void
269 loadtable(FILE *nf)
270 {
271 char buf[MAXGROUPLEN];
272 char *p;
273 char *group;
274 char *line;
275
276 while (getaline(buf, MAXGROUPLEN, nf)) {
277 for (p = buf; *p && isspace((int)*p); p++)
278 ; /* skip leading blanks */
279 for (; *p && *p != '#' && *p != ' ' && *p != '\t'; p++)
280 ;
281 if (*p == EOS || *p == '#')
282 continue;
283 *p++ = EOS;
284
285 while (*p == ' ' || *p == '\t') {
286 p++;
287 }
288 if (*p == EOS || *p == '#')
289 continue;
290
291 STRCPY(group, buf);
292 STRCPY(line, p);
293 store(ngtable, group, line);
294 }
295 }