pw.c revision 42394 
1/*-
2 * Copyright (C) 1996
3 *	David L. Nugent.  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 *
14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#ifndef lint
28static const char rcsid[] =
29	"$Id: pw.c,v 1.10 1998/08/04 22:31:26 nate Exp $";
30#endif /* not lint */
31
32#include "pw.h"
33#include <err.h>
34#include <fcntl.h>
35#include <paths.h>
36#include <sys/wait.h>
37
38const char     *Modes[] = {"add", "del", "mod", "show", "next", NULL};
39const char     *Which[] = {"user", "group", NULL};
40static const char *Combo1[] = {
41  "useradd", "userdel", "usermod", "usershow", "usernext",
42  "groupadd", "groupdel", "groupmod", "groupshow", "groupnext",
43  NULL};
44static const char *Combo2[] = {
45  "adduser", "deluser", "moduser", "showuser", "nextuser",
46  "addgroup", "delgroup", "modgroup", "showgroup", "nextgroup",
47NULL};
48
49static struct cargs arglist;
50
51static int      getindex(const char *words[], const char *word);
52static void     cmdhelp(int mode, int which);
53
54
55int
56main(int argc, char *argv[])
57{
58	int             ch;
59	int             mode = -1;
60	int             which = -1;
61	struct userconf *cnf;
62
63	static const char *opts[W_NUM][M_NUM] =
64	{
65		{ /* user */
66			"C:qn:u:c:d:e:p:g:G:mk:s:oL:i:w:h:Db:NPy:Y",
67			"C:qn:u:rY",
68			"C:qn:u:c:d:e:p:g:G:ml:k:s:w:L:h:FNPY",
69			"C:qn:u:FPa",
70			"C:q"
71		},
72		{ /* grp  */
73			"C:qn:g:h:M:pNPY",
74			"C:qn:g:Y",
75			"C:qn:g:l:h:FM:m:NPY",
76			"C:qn:g:FPa",
77			"C:q"
78		 }
79	};
80
81	static int      (*funcs[W_NUM]) (struct userconf * _cnf, int _mode, struct cargs * _args) =
82	{			/* Request handlers */
83		pw_user,
84		pw_group
85	};
86
87	umask(0);		/* We wish to handle this manually */
88	LIST_INIT(&arglist);
89
90	/*
91	 * Break off the first couple of words to determine what exactly
92	 * we're being asked to do
93	 */
94	while (argc > 1 && *argv[1] != '-') {
95		int             tmp;
96
97		if ((tmp = getindex(Modes, argv[1])) != -1)
98			mode = tmp;
99		else if ((tmp = getindex(Which, argv[1])) != -1)
100			which = tmp;
101		else if ((tmp = getindex(Combo1, argv[1])) != -1 || (tmp = getindex(Combo2, argv[1])) != -1) {
102			which = tmp / M_NUM;
103			mode = tmp % M_NUM;
104		} else if (strcmp(argv[1], "help") == 0)
105			cmdhelp(mode, which);
106		else if (which != -1 && mode != -1 && arglist.lh_first == NULL)
107			addarg(&arglist, 'n', argv[1]);
108		else
109			errx(EX_USAGE, "unknown keyword `%s'", argv[1]);
110		++argv;
111		--argc;
112	}
113
114	/*
115	 * Bail out unless the user is specific!
116	 */
117	if (mode == -1 || which == -1)
118		cmdhelp(mode, which);
119
120	/*
121	 * We know which mode we're in and what we're about to do, so now
122	 * let's dispatch the remaining command line args in a genric way.
123	 */
124	optarg = NULL;
125
126	while ((ch = getopt(argc, argv, opts[which][mode])) != -1) {
127		if (ch == '?')
128			errx(EX_USAGE, NULL);
129		else
130			addarg(&arglist, ch, optarg);
131		optarg = NULL;
132	}
133
134	/*
135	 * Must be root to attempt an update
136	 */
137	if (geteuid() != 0 && mode != M_PRINT && mode != M_NEXT && getarg(&arglist, 'N')==NULL)
138		errx(EX_NOPERM, "you must be root to run this program");
139
140	/*
141	 * We should immediately look for the -q 'quiet' switch so that we
142	 * don't bother with extraneous errors
143	 */
144	if (getarg(&arglist, 'q') != NULL)
145		freopen("/dev/null", "w", stderr);
146
147	/*
148	 * Now, let's do the common initialisation
149	 */
150	cnf = read_userconfig(getarg(&arglist, 'C') ? getarg(&arglist, 'C')->val : NULL);
151
152	ch = funcs[which] (cnf, mode, &arglist);
153
154	/*
155	 * If everything went ok, and we've been asked to update
156	 * the NIS maps, then do it now
157	 */
158	if (ch == EXIT_SUCCESS && getarg(&arglist, 'Y') != NULL) {
159		pid_t	pid;
160
161		fflush(NULL);
162		if (chdir(_PATH_YP) == -1)
163			warn("chdir(" _PATH_YP ")");
164		else if ((pid = fork()) == -1)
165			warn("fork()");
166		else if (pid == 0) {
167			/* Is make anywhere else? */
168			execlp("/usr/bin/make", "make", NULL);
169			_exit(1);
170		} else {
171			int   i;
172			waitpid(pid, &i, 0);
173			if ((i = WEXITSTATUS(i)) != 0)
174				errx(ch, "make exited with status %d", i);
175			else
176				pw_log(cnf, mode, which, "NIS maps updated");
177		}
178	}
179	return ch;
180}
181
182
183static int
184getindex(const char *words[], const char *word)
185{
186	int             i = 0;
187
188	while (words[i]) {
189		if (strcmp(words[i], word) == 0)
190			return i;
191		i++;
192	}
193	return -1;
194}
195
196
197/*
198 * This is probably an overkill for a cmdline help system, but it reflects
199 * the complexity of the command line.
200 */
201
202static void
203cmdhelp(int mode, int which)
204{
205	if (which == -1)
206		fprintf(stderr, "usage: pw [user|group] [add|del|mod|show|next] [ help | switches/values ]\n");
207	else if (mode == -1)
208		fprintf(stderr, "usage: pw %s [add|del|mod|show|next] [ help | switches/values ]\n", Which[which]);
209	else {
210
211		/*
212		 * We need to give mode specific help
213		 */
214		static const char *help[W_NUM][M_NUM] =
215		{
216			{
217				"usage: pw useradd [name] [switches]\n"
218				"\t-C config      configuration file\n"
219				"\t-q             quiet operation\n"
220				"  Adding users:\n"
221				"\t-n name        login name\n"
222				"\t-u uid         user id\n"
223				"\t-c comment     user name/comment\n"
224				"\t-d directory   home directory\n"
225				"\t-e date        account expiry date\n"
226				"\t-p date        password expiry date\n"
227				"\t-g grp         initial group\n"
228				"\t-G grp1,grp2   additional groups\n"
229				"\t-m [ -k dir ]  create and set up home\n"
230				"\t-s shell       name of login shell\n"
231				"\t-o             duplicate uid ok\n"
232				"\t-L class       user class\n"
233				"\t-h fd          read password on fd\n"
234				"\t-Y             update NIS maps\n"
235				"\t-N             no update\n"
236				"  Setting defaults:\n"
237				"\t-D             set user defaults\n"
238				"\t-b dir         default home root dir\n"
239				"\t-e period      default expiry period\n"
240				"\t-p period      default password change period\n"
241				"\t-g group       default group\n"
242				"\t-G grp1,grp2   additional groups\n"
243				"\t-L class       default user class\n"
244				"\t-k dir         default home skeleton\n"
245				"\t-u min,max     set min,max uids\n"
246				"\t-i min,max     set min,max gids\n"
247				"\t-w method      set default password method\n"
248				"\t-s shell       default shell\n"
249				"\t-y path        set NIS passwd file path\n",
250				"usage: pw userdel [uid|name] [switches]\n"
251				"\t-n name        login name\n"
252				"\t-u uid         user id\n"
253				"\t-Y             update NIS maps\n"
254				"\t-r             remove home & contents\n",
255				"usage: pw usermod [uid|name] [switches]\n"
256				"\t-C config      configuration file\n"
257				"\t-q             quiet operation\n"
258				"\t-F             force add if no user\n"
259				"\t-n name        login name\n"
260				"\t-u uid         user id\n"
261				"\t-c comment     user name/comment\n"
262				"\t-d directory   home directory\n"
263				"\t-e date        account expiry date\n"
264				"\t-p date        password expiry date\n"
265				"\t-g grp         initial group\n"
266				"\t-G grp1,grp2   additional groups\n"
267				"\t-l name        new login name\n"
268				"\t-L class       user class\n"
269				"\t-m [ -k dir ]  create and set up home\n"
270				"\t-s shell       name of login shell\n"
271				"\t-w method      set new password using method\n"
272				"\t-h fd          read password on fd\n"
273				"\t-Y             update NIS maps\n"
274				"\t-N             no update\n",
275				"usage: pw usershow [uid|name] [switches]\n"
276				"\t-n name        login name\n"
277				"\t-u uid         user id\n"
278				"\t-F             force print\n"
279				"\t-P             prettier format\n"
280				"\t-a             print all users\n",
281				"usage: pw usernext [switches]\n"
282				"\t-C config      configuration file\n"
283			},
284			{
285				"usage: pw groupadd [group|gid] [switches]\n"
286				"\t-C config      configuration file\n"
287				"\t-q             quiet operation\n"
288				"\t-n group       group name\n"
289				"\t-g gid         group id\n"
290				"\t-M usr1,usr2   add users as group members\n"
291				"\t-o             duplicate gid ok\n"
292				"\t-Y             update NIS maps\n"
293				"\t-N             no update\n",
294				"usage: pw groupdel [group|gid] [switches]\n"
295				"\t-n name        group name\n"
296				"\t-g gid         group id\n"
297				"\t-Y             update NIS maps\n",
298				"usage: pw groupmod [group|gid] [switches]\n"
299				"\t-C config      configuration file\n"
300				"\t-q             quiet operation\n"
301				"\t-F             force add if not exists\n"
302				"\t-n name        group name\n"
303				"\t-g gid         group id\n"
304				"\t-M usr1,usr2   replaces users as group members\n"
305				"\t-m usr1,usr2   add users as group members\n"
306				"\t-l name        new group name\n"
307				"\t-Y             update NIS maps\n"
308				"\t-N             no update\n",
309				"usage: pw groupshow [group|gid] [switches]\n"
310				"\t-n name        group name\n"
311				"\t-g gid         group id\n"
312				"\t-F             force print\n"
313				"\t-P             prettier format\n"
314				"\t-a             print all accounting groups\n",
315				"usage: pw groupnext [switches]\n"
316				"\t-C config      configuration file\n"
317			}
318		};
319
320		fprintf(stderr, help[which][mode]);
321	}
322	exit(EXIT_FAILURE);
323}
324
325struct carg    *
326getarg(struct cargs * _args, int ch)
327{
328	struct carg    *c = _args->lh_first;
329
330	while (c != NULL && c->ch != ch)
331		c = c->list.le_next;
332	return c;
333}
334
335struct carg    *
336addarg(struct cargs * _args, int ch, char *argstr)
337{
338	struct carg    *ca = malloc(sizeof(struct carg));
339
340	if (ca == NULL)
341		errx(EX_OSERR, "out of memory");
342	ca->ch = ch;
343	ca->val = argstr;
344	LIST_INSERT_HEAD(_args, ca, list);
345	return ca;
346}
347