pw.c revision 21330 
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 *	$Id: pw.c,v 1.1.1.3 1996/12/10 23:58:58 joerg Exp $
27 */
28
29#include "pw.h"
30#include <paths.h>
31#include <sys/wait.h>
32
33static char    *progname = "pw";
34
35const char     *Modes[] = {"add", "del", "mod", "show", "next", NULL};
36const char     *Which[] = {"user", "group", NULL};
37static const char *Combo1[] = {
38  "useradd", "userdel", "usermod", "usershow", "usernext",
39  "groupadd", "groupdel", "groupmod", "groupshow", "groupnext",
40  NULL};
41static const char *Combo2[] = {
42  "adduser", "deluser", "moduser", "showuser", "nextuser",
43  "addgroup", "delgroup", "modgroup", "showgroup", "nextgroup",
44NULL};
45
46static struct cargs arglist;
47
48static int      getindex(const char *words[], const char *word);
49static void     cmdhelp(int mode, int which);
50
51
52int
53main(int argc, char *argv[])
54{
55	int             ch;
56	int             mode = -1;
57	int             which = -1;
58	struct userconf *cnf;
59
60	static const char *opts[W_NUM][M_NUM] =
61	{
62		{ /* user */
63			"C:qn:u:c:d:e:p:g:G:mk:s:oL:i:w:h:Db:NPy:Y",
64			"C:qn:u:rY",
65			"C:qn:u:c:d:e:p:g:G:mk:s:w:L:h:FNPY",
66			"C:qn:u:FPa",
67			"C:q"
68		},
69		{ /* grp  */
70			"C:qn:g:h:M:pNPY",
71			"C:qn:g:Y",
72			"C:qn:g:l:h:FM:m:NPY",
73			"C:qn:g:FPa",
74			"C:q"
75		 }
76	};
77
78	static int      (*funcs[W_NUM]) (struct userconf * _cnf, int _mode, struct cargs * _args) =
79	{			/* Request handlers */
80		pw_user,
81		pw_group
82	};
83
84	umask(0);		/* We wish to handle this manually */
85	progname = strrchr(argv[0], '/');
86	if (progname != NULL)
87		++progname;
88	else
89		progname = argv[0];
90
91	LIST_INIT(&arglist);
92
93	/*
94	 * Break off the first couple of words to determine what exactly
95	 * we're being asked to do
96	 */
97	while (argc > 1 && *argv[1] != '-') {
98		int             tmp;
99
100		if ((tmp = getindex(Modes, argv[1])) != -1)
101			mode = tmp;
102		else if ((tmp = getindex(Which, argv[1])) != -1)
103			which = tmp;
104		else if ((tmp = getindex(Combo1, argv[1])) != -1 || (tmp = getindex(Combo2, argv[1])) != -1) {
105			which = tmp / M_NUM;
106			mode = tmp % M_NUM;
107		} else if (strcmp(argv[1], "help") == 0)
108			cmdhelp(mode, which);
109		else if (which != -1 && mode != -1 && arglist.lh_first == NULL)
110			addarg(&arglist, 'n', argv[1]);
111		else
112			cmderr(EX_USAGE, "Unknown keyword `%s'\n", argv[1]);
113		++argv;
114		--argc;
115	}
116
117	/*
118	 * Bail out unless the user is specific!
119	 */
120	if (mode == -1 || which == -1)
121		cmdhelp(mode, which);
122
123	/*
124	 * We know which mode we're in and what we're about to do, so now
125	 * let's dispatch the remaining command line args in a genric way.
126	 */
127	argv[0] = progname;	/* Preserve this */
128	optarg = NULL;
129
130	while ((ch = getopt(argc, argv, opts[which][mode])) != -1) {
131		if (ch == '?')
132			cmderr(EX_USAGE, NULL);
133		else
134			addarg(&arglist, ch, optarg);
135		optarg = NULL;
136	}
137
138	/*
139	 * Must be root to attempt an update
140	 */
141	if (getuid() != 0 && mode != M_PRINT && mode != M_NEXT && getarg(&arglist, 'N')==NULL)
142		cmderr(EX_NOPERM, "you must be root to run this program\n");
143
144	/*
145	 * We should immediately look for the -q 'quiet' switch so that we
146	 * don't bother with extraneous errors
147	 */
148	if (getarg(&arglist, 'q') != NULL)
149		freopen("/dev/null", "w", stderr);
150
151	/*
152	 * Now, let's do the common initialisation
153	 */
154	cnf = read_userconfig(getarg(&arglist, 'C') ? getarg(&arglist, 'C')->val : NULL);
155	ch = funcs[which] (cnf, mode, &arglist);
156
157	/*
158	 * If everything went ok, and we've been asked to update
159	 * the NIS maps, then do it now
160	 */
161	if (ch == EXIT_SUCCESS && getarg(&arglist, 'Y') != NULL) {
162		pid_t	pid;
163
164		fflush(NULL);
165		if (chdir(_PATH_YP) == -1)
166			perror("chdir(" _PATH_YP ")");
167		else if ((pid = fork()) == -1)
168			perror("fork()");
169		else if (pid == 0) {
170			/* Is make anywhere else? */
171			execlp("/usr/bin/make", "make", NULL);
172			_exit(1);
173		} else {
174			int   i;
175			waitpid(pid, &i, 0);
176			if ((i = WEXITSTATUS(i)) != 0)
177				cmderr(ch, "warning: make exited with status %d\n", i);
178			else
179				pw_log(cnf, mode, which, "NIS maps updated");
180		}
181	}
182	return ch;
183}
184
185static int
186getindex(const char *words[], const char *word)
187{
188	int             i = 0;
189
190	while (words[i]) {
191		if (strcmp(words[i], word) == 0)
192			return i;
193		i++;
194	}
195	return -1;
196}
197
198
199/*
200 * This is probably an overkill for a cmdline help system, but it reflects
201 * the complexity of the command line.
202 */
203
204static void
205banner(void)
206{
207	fprintf(stderr, "%s: ", progname);
208}
209
210void
211cmderr(int ec, char const * fmt,...)
212{
213	if (fmt != NULL) {
214		va_list         argp;
215
216		banner();
217		va_start(argp, fmt);
218		vfprintf(stderr, fmt, argp);
219		va_end(argp);
220	}
221	exit(ec);
222}
223
224static void
225cmdhelp(int mode, int which)
226{
227	banner();
228	if (which == -1)
229		fprintf(stderr, "usage: %s [user|group] [add|del|mod|show|next] [ help | switches/values ]\n", progname);
230	else if (mode == -1)
231		fprintf(stderr, "usage: %s %s [add|del|mod|show|next] [ help | switches/values ]\n", progname, Which[which]);
232	else {
233
234		/*
235		 * We need to give mode specific help
236		 */
237		static const char *help[W_NUM][M_NUM] =
238		{
239			{
240				"usage: %s useradd [name] [switches]\n"
241				"\t-C config      configuration file\n"
242				"\t-q             quiet operation\n"
243				"  Adding users:\n"
244				"\t-n name        login name\n"
245				"\t-u uid         user id\n"
246				"\t-c comment     user name/comment\n"
247				"\t-d directory   home directory\n"
248				"\t-e date        account expiry date\n"
249				"\t-p date        password expiry date\n"
250				"\t-g grp         initial group\n"
251				"\t-G grp1,grp2   additional groups\n"
252				"\t-m [ -k dir ]  create and set up home\n"
253				"\t-s shell       name of login shell\n"
254				"\t-o             duplicate uid ok\n"
255				"\t-L class       user class\n"
256				"\t-h fd          read password on fd\n"
257				"\t-Y             update NIS maps\n"
258				"\t-N             no update\n"
259				"  Setting defaults:\n"
260				"\t-D             set user defaults\n"
261				"\t-b dir         default home root dir\n"
262				"\t-e period      default expiry period\n"
263				"\t-p period      default password change period\n"
264				"\t-g group       default group\n"
265				"\t-G grp1,grp2   additional groups\n"
266				"\t-L class       default user class\n"
267				"\t-k dir         default home skeleton\n"
268				"\t-u min,max     set min,max uids\n"
269				"\t-i min,max     set min,max gids\n"
270				"\t-w method      set default password method\n"
271				"\t-s shell       default shell\n"
272				"\t-y path        set NIS passwd file path\n",
273				"usage: %s userdel [uid|name] [switches]\n"
274				"\t-n name        login name\n"
275				"\t-u uid         user id\n"
276				"\t-Y             update NIS maps\n"
277				"\t-r             remove home & contents\n",
278				"usage: %s usermod [uid|name] [switches]\n"
279				"\t-C config      configuration file\n"
280				"\t-q             quiet operation\n"
281				"\t-F             force add if no user\n"
282				"\t-n name        login name\n"
283				"\t-u uid         user id\n"
284				"\t-c comment     user name/comment\n"
285				"\t-d directory   home directory\n"
286				"\t-e date        account expiry date\n"
287				"\t-p date        password expiry date\n"
288				"\t-g grp         initial group\n"
289				"\t-G grp1,grp2   additional groups\n"
290				"\t-l name        new login name\n"
291				"\t-L class       user class\n"
292				"\t-m [ -k dir ]  create and set up home\n"
293				"\t-s shell       name of login shell\n"
294				"\t-w method      set new password using method\n"
295				"\t-h fd          read password on fd\n"
296				"\t-Y             update NIS maps\n"
297				"\t-N             no update\n",
298				"usage: %s usershow [uid|name] [switches]\n"
299				"\t-n name        login name\n"
300				"\t-u uid         user id\n"
301				"\t-F             force print\n"
302				"\t-P             prettier format\n"
303				"\t-a             print all users\n",
304				"usage: %s usernext [switches]\n"
305				"\t-C config      configuration file\n"
306			},
307			{
308				"usage: %s groupadd [group|gid] [switches]\n"
309				"\t-C config      configuration file\n"
310				"\t-q             quiet operation\n"
311				"\t-n group       group name\n"
312				"\t-g gid         group id\n"
313				"\t-M usr1,usr2   add users as group members\n"
314				"\t-o             duplicate gid ok\n"
315				"\t-Y             update NIS maps\n"
316				"\t-N             no update\n",
317				"usage: %s groupdel [group|gid] [switches]\n"
318				"\t-n name        group name\n"
319				"\t-g gid         group id\n"
320				"\t-Y             update NIS maps\n",
321				"usage: %s groupmod [group|gid] [switches]\n"
322				"\t-C config      configuration file\n"
323				"\t-q             quiet operation\n"
324				"\t-F             force add if not exists\n"
325				"\t-n name        group name\n"
326				"\t-g gid         group id\n"
327				"\t-M usr1,usr2   replaces users as group members\n"
328				"\t-m usr1,usr2   add users as group members\n"
329				"\t-l name        new group name\n"
330				"\t-Y             update NIS maps\n"
331				"\t-N             no update\n",
332				"usage: %s groupshow [group|gid] [switches]\n"
333				"\t-n name        group name\n"
334				"\t-g gid         group id\n"
335				"\t-F             force print\n"
336				"\t-P             prettier format\n"
337				"\t-a             print all accounting groups\n",
338				"usage: %s groupnext [switches]\n"
339				"\t-C config      configuration file\n"
340			}
341		};
342
343		fprintf(stderr, help[which][mode], progname);
344	}
345	exit(EXIT_FAILURE);
346}
347
348struct carg    *
349getarg(struct cargs * _args, int ch)
350{
351	struct carg    *c = _args->lh_first;
352
353	while (c != NULL && c->ch != ch)
354		c = c->list.le_next;
355	return c;
356}
357
358struct carg    *
359addarg(struct cargs * _args, int ch, char *argstr)
360{
361	struct carg    *ca = malloc(sizeof(struct carg));
362
363	if (ca == NULL)
364		cmderr(EX_OSERR, "Abort - out of memory\n");
365	ca->ch = ch;
366	ca->val = argstr;
367	LIST_INSERT_HEAD(_args, ca, list);
368	return ca;
369}
370