pw.c revision 74226 
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  "$FreeBSD: head/usr.sbin/pw/pw.c 74226 2001-03-14 03:24:30Z dd $";
30#endif /* not lint */
31
32#include <err.h>
33#include <fcntl.h>
34#include <locale.h>
35#include <paths.h>
36#include <sys/wait.h>
37#include "pw.h"
38
39#if !defined(_PATH_YP)
40#define	_PATH_YP	"/var/yp/"
41#endif
42const char     *Modes[] = {
43  "add", "del", "mod", "show", "next",
44  NULL};
45const char     *Which[] = {"user", "group", NULL};
46static const char *Combo1[] = {
47  "useradd", "userdel", "usermod", "usershow", "usernext",
48  "lock", "unlock",
49  "groupadd", "groupdel", "groupmod", "groupshow", "groupnext",
50  NULL};
51static const char *Combo2[] = {
52  "adduser", "deluser", "moduser", "showuser", "nextuser",
53  "lock", "unlock",
54  "addgroup", "delgroup", "modgroup", "showgroup", "nextgroup",
55  NULL};
56
57struct pwf PWF =
58{
59	0,
60	setpwent,
61	endpwent,
62	getpwent,
63	getpwuid,
64	getpwnam,
65	pwdb,
66	setgrent,
67	endgrent,
68	getgrent,
69	getgrgid,
70	getgrnam,
71	grdb
72
73};
74struct pwf VPWF =
75{
76	1,
77	vsetpwent,
78	vendpwent,
79	vgetpwent,
80	vgetpwuid,
81	vgetpwnam,
82	vpwdb,
83	vsetgrent,
84	vendgrent,
85	vgetgrent,
86	vgetgrgid,
87	vgetgrnam,
88	vgrdb
89};
90
91static struct cargs arglist;
92
93static int      getindex(const char *words[], const char *word);
94static void     cmdhelp(int mode, int which);
95
96
97int
98main(int argc, char *argv[])
99{
100	int             ch;
101	int             mode = -1;
102	int             which = -1;
103	char		*config = NULL;
104	struct userconf *cnf;
105
106	static const char *opts[W_NUM][M_NUM] =
107	{
108		{ /* user */
109			"V:C:qn:u:c:d:e:p:g:G:mk:s:oL:i:w:h:Db:NPy:Y",
110			"V:C:qn:u:rY",
111			"V:C:qn:u:c:d:e:p:g:G:ml:k:s:w:L:h:FNPY",
112			"V:C:qn:u:FPa7",
113			"V:C:q",
114			"V:C:q",
115			"V:C:q"
116		},
117		{ /* grp  */
118			"V:C:qn:g:h:M:pNPY",
119			"V:C:qn:g:Y",
120			"V:C:qn:g:l:h:FM:m:NPY",
121			"V:C:qn:g:FPa",
122			"V:C:q"
123		 }
124	};
125
126	static int      (*funcs[W_NUM]) (struct userconf * _cnf, int _mode, struct cargs * _args) =
127	{			/* Request handlers */
128		pw_user,
129		pw_group
130	};
131
132	umask(0);		/* We wish to handle this manually */
133	LIST_INIT(&arglist);
134
135	(void)setlocale(LC_ALL, "");
136
137	/*
138	 * Break off the first couple of words to determine what exactly
139	 * we're being asked to do
140	 */
141	while (argc > 1) {
142		int             tmp;
143
144		if (*argv[1] == '-') {
145			/*
146			 * Special case, allow pw -V<dir> <operation> [args] for scripts etc.
147			 */
148			if (argv[1][1] == 'V') {
149				optarg = &argv[1][2];
150				if (*optarg == '\0') {
151					optarg = argv[2];
152					++argv;
153					--argc;
154				}
155				addarg(&arglist, 'V', optarg);
156			} else
157				break;
158		}
159		else if (mode == -1 && (tmp = getindex(Modes, argv[1])) != -1)
160			mode = tmp;
161		else if (which == -1 && (tmp = getindex(Which, argv[1])) != -1)
162			which = tmp;
163		else if ((mode == -1 && which == -1) &&
164			 ((tmp = getindex(Combo1, argv[1])) != -1 ||
165			  (tmp = getindex(Combo2, argv[1])) != -1)) {
166			which = tmp / M_NUM;
167			mode = tmp % M_NUM;
168		} else if (strcmp(argv[1], "help") == 0 && argv[2] == NULL)
169			cmdhelp(mode, which);
170		else if (which != -1 && mode != -1)
171			addarg(&arglist, 'n', argv[1]);
172		else
173			errx(EX_USAGE, "unknown keyword `%s'", argv[1]);
174		++argv;
175		--argc;
176	}
177
178	/*
179	 * Bail out unless the user is specific!
180	 */
181	if (mode == -1 || which == -1)
182		cmdhelp(mode, which);
183
184	/*
185	 * We know which mode we're in and what we're about to do, so now
186	 * let's dispatch the remaining command line args in a genric way.
187	 */
188	optarg = NULL;
189
190	while ((ch = getopt(argc, argv, opts[which][mode])) != -1) {
191		if (ch == '?')
192			errx(EX_USAGE, "unknown switch");
193		else
194			addarg(&arglist, ch, optarg);
195		optarg = NULL;
196	}
197
198	/*
199	 * Must be root to attempt an update
200	 */
201	if (geteuid() != 0 && mode != M_PRINT && mode != M_NEXT && getarg(&arglist, 'N')==NULL)
202		errx(EX_NOPERM, "you must be root to run this program");
203
204	/*
205	 * We should immediately look for the -q 'quiet' switch so that we
206	 * don't bother with extraneous errors
207	 */
208	if (getarg(&arglist, 'q') != NULL)
209		freopen(_PATH_DEVNULL, "w", stderr);
210
211	/*
212	 * Set our base working path if not overridden
213	 */
214
215	config = getarg(&arglist, 'C') ? getarg(&arglist, 'C')->val : NULL;
216
217	if (getarg(&arglist, 'V') != NULL) {
218		char * etcpath = getarg(&arglist, 'V')->val;
219		if (*etcpath) {
220			if (config == NULL) {	/* Only override config location if -C not specified */
221				config = malloc(MAXPATHLEN);
222				snprintf(config, MAXPATHLEN, "%s/pw.conf", etcpath);
223			}
224			memcpy(&PWF, &VPWF, sizeof PWF);
225			setpwdir(etcpath);
226			setgrdir(etcpath);
227		}
228	}
229
230	/*
231	 * Now, let's do the common initialisation
232	 */
233	cnf = read_userconfig(config);
234
235	ch = funcs[which] (cnf, mode, &arglist);
236
237	/*
238	 * If everything went ok, and we've been asked to update
239	 * the NIS maps, then do it now
240	 */
241	if (ch == EXIT_SUCCESS && getarg(&arglist, 'Y') != NULL) {
242		pid_t	pid;
243
244		fflush(NULL);
245		if (chdir(_PATH_YP) == -1)
246			warn("chdir(" _PATH_YP ")");
247		else if ((pid = fork()) == -1)
248			warn("fork()");
249		else if (pid == 0) {
250			/* Is make anywhere else? */
251			execlp("/usr/bin/make", "make", NULL);
252			_exit(1);
253		} else {
254			int   i;
255			waitpid(pid, &i, 0);
256			if ((i = WEXITSTATUS(i)) != 0)
257				errx(ch, "make exited with status %d", i);
258			else
259				pw_log(cnf, mode, which, "NIS maps updated");
260		}
261	}
262	return ch;
263}
264
265
266static int
267getindex(const char *words[], const char *word)
268{
269	int             i = 0;
270
271	while (words[i]) {
272		if (strcmp(words[i], word) == 0)
273			return i;
274		i++;
275	}
276	return -1;
277}
278
279
280/*
281 * This is probably an overkill for a cmdline help system, but it reflects
282 * the complexity of the command line.
283 */
284
285static void
286cmdhelp(int mode, int which)
287{
288	if (which == -1)
289		fprintf(stderr, "usage:\n  pw [user|group|lock|unlock] [add|del|mod|show|next] [help|switches/values]\n");
290	else if (mode == -1)
291		fprintf(stderr, "usage:\n  pw %s [add|del|mod|show|next] [help|switches/values]\n", Which[which]);
292	else {
293
294		/*
295		 * We need to give mode specific help
296		 */
297		static const char *help[W_NUM][M_NUM] =
298		{
299			{
300				"usage: pw useradd [name] [switches]\n"
301				"\t-V etcdir      alternate /etc location\n"
302				"\t-C config      configuration file\n"
303				"\t-q             quiet operation\n"
304				"  Adding users:\n"
305				"\t-n name        login name\n"
306				"\t-u uid         user id\n"
307				"\t-c comment     user name/comment\n"
308				"\t-d directory   home directory\n"
309				"\t-e date        account expiry date\n"
310				"\t-p date        password expiry date\n"
311				"\t-g grp         initial group\n"
312				"\t-G grp1,grp2   additional groups\n"
313				"\t-m [ -k dir ]  create and set up home\n"
314				"\t-s shell       name of login shell\n"
315				"\t-o             duplicate uid ok\n"
316				"\t-L class       user class\n"
317				"\t-h fd          read password on fd\n"
318				"\t-Y             update NIS maps\n"
319				"\t-N             no update\n"
320				"  Setting defaults:\n"
321				"\t-V etcdir      alternate /etc location\n"
322			        "\t-D             set user defaults\n"
323				"\t-b dir         default home root dir\n"
324				"\t-e period      default expiry period\n"
325				"\t-p period      default password change period\n"
326				"\t-g group       default group\n"
327				"\t-G grp1,grp2   additional groups\n"
328				"\t-L class       default user class\n"
329				"\t-k dir         default home skeleton\n"
330				"\t-u min,max     set min,max uids\n"
331				"\t-i min,max     set min,max gids\n"
332				"\t-w method      set default password method\n"
333				"\t-s shell       default shell\n"
334				"\t-y path        set NIS passwd file path\n",
335				"usage: pw userdel [uid|name] [switches]\n"
336				"\t-V etcdir      alternate /etc location\n"
337				"\t-n name        login name\n"
338				"\t-u uid         user id\n"
339				"\t-Y             update NIS maps\n"
340				"\t-r             remove home & contents\n",
341				"usage: pw usermod [uid|name] [switches]\n"
342				"\t-V etcdir      alternate /etc location\n"
343				"\t-C config      configuration file\n"
344				"\t-q             quiet operation\n"
345				"\t-F             force add if no user\n"
346				"\t-n name        login name\n"
347				"\t-u uid         user id\n"
348				"\t-c comment     user name/comment\n"
349				"\t-d directory   home directory\n"
350				"\t-e date        account expiry date\n"
351				"\t-p date        password expiry date\n"
352				"\t-g grp         initial group\n"
353				"\t-G grp1,grp2   additional groups\n"
354				"\t-l name        new login name\n"
355				"\t-L class       user class\n"
356				"\t-m [ -k dir ]  create and set up home\n"
357				"\t-s shell       name of login shell\n"
358				"\t-w method      set new password using method\n"
359				"\t-h fd          read password on fd\n"
360				"\t-Y             update NIS maps\n"
361				"\t-N             no update\n",
362				"usage: pw usershow [uid|name] [switches]\n"
363				"\t-V etcdir      alternate /etc location\n"
364				"\t-n name        login name\n"
365				"\t-u uid         user id\n"
366				"\t-F             force print\n"
367				"\t-P             prettier format\n"
368				"\t-a             print all users\n"
369				"\t-7             print in v7 format\n",
370				"usage: pw usernext [switches]\n"
371				"\t-V etcdir      alternate /etc location\n"
372				"\t-C config      configuration file\n"
373				"\t-q             quiet operation\n",
374				"usage pw: lock [switches]\n"
375				"\t-V etcdir      alternate /etc locations\n"
376				"\t-C config      configuration file\n"
377				"\t-q             quiet operation\n",
378				"usage pw: unlock [switches]\n"
379				"\t-V etcdir      alternate /etc locations\n"
380				"\t-C config      configuration file\n"
381				"\t-q             quiet operation\n"
382			},
383			{
384				"usage: pw groupadd [group|gid] [switches]\n"
385				"\t-V etcdir      alternate /etc location\n"
386				"\t-C config      configuration file\n"
387				"\t-q             quiet operation\n"
388				"\t-n group       group name\n"
389				"\t-g gid         group id\n"
390				"\t-M usr1,usr2   add users as group members\n"
391				"\t-o             duplicate gid ok\n"
392				"\t-Y             update NIS maps\n"
393				"\t-N             no update\n",
394				"usage: pw groupdel [group|gid] [switches]\n"
395				"\t-V etcdir      alternate /etc location\n"
396				"\t-n name        group name\n"
397				"\t-g gid         group id\n"
398				"\t-Y             update NIS maps\n",
399				"usage: pw groupmod [group|gid] [switches]\n"
400				"\t-V etcdir      alternate /etc location\n"
401				"\t-C config      configuration file\n"
402				"\t-q             quiet operation\n"
403				"\t-F             force add if not exists\n"
404				"\t-n name        group name\n"
405				"\t-g gid         group id\n"
406				"\t-M usr1,usr2   replaces users as group members\n"
407				"\t-m usr1,usr2   add users as group members\n"
408				"\t-l name        new group name\n"
409				"\t-Y             update NIS maps\n"
410				"\t-N             no update\n",
411				"usage: pw groupshow [group|gid] [switches]\n"
412				"\t-V etcdir      alternate /etc location\n"
413				"\t-n name        group name\n"
414				"\t-g gid         group id\n"
415				"\t-F             force print\n"
416				"\t-P             prettier format\n"
417				"\t-a             print all accounting groups\n",
418				"usage: pw groupnext [switches]\n"
419				"\t-V etcdir      alternate /etc location\n"
420				"\t-C config      configuration file\n"
421				"\t-q             quiet operation\n"
422			}
423		};
424
425		fprintf(stderr, help[which][mode]);
426	}
427	exit(EXIT_FAILURE);
428}
429
430struct carg    *
431getarg(struct cargs * _args, int ch)
432{
433	struct carg    *c = LIST_FIRST(_args);
434
435	while (c != NULL && c->ch != ch)
436		c = LIST_NEXT(c, list);
437	return c;
438}
439
440struct carg    *
441addarg(struct cargs * _args, int ch, char *argstr)
442{
443	struct carg    *ca = malloc(sizeof(struct carg));
444
445	if (ca == NULL)
446		errx(EX_OSERR, "out of memory");
447	ca->ch = ch;
448	ca->val = argstr;
449	LIST_INSERT_HEAD(_args, ca, list);
450	return ca;
451}
452