pw.c revision 61760 
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 61760 2000-06-18 02:39:17Z davidn $";
30#endif /* not lint */
31
32#include <err.h>
33#include <fcntl.h>
34#include <paths.h>
35#include <sys/wait.h>
36#include "pw.h"
37
38#if !defined(_PATH_YP)
39#define	_PATH_YP	"/var/yp/"
40#endif
41const char     *Modes[] = {
42  "add", "del", "mod", "show", "next",
43  NULL};
44const char     *Which[] = {"user", "group", NULL};
45static const char *Combo1[] = {
46  "useradd", "userdel", "usermod", "usershow", "usernext",
47  "lock", "unlock",
48  "groupadd", "groupdel", "groupmod", "groupshow", "groupnext",
49  NULL};
50static const char *Combo2[] = {
51  "adduser", "deluser", "moduser", "showuser", "nextuser",
52  "lock", "unlock",
53  "addgroup", "delgroup", "modgroup", "showgroup", "nextgroup",
54  NULL};
55
56struct pwf PWF =
57{
58	0,
59	setpwent,
60	endpwent,
61	getpwent,
62	getpwuid,
63	getpwnam,
64	pwdb,
65	setgrent,
66	endgrent,
67	getgrent,
68	getgrgid,
69	getgrnam,
70	grdb
71
72};
73struct pwf VPWF =
74{
75	1,
76	vsetpwent,
77	vendpwent,
78	vgetpwent,
79	vgetpwuid,
80	vgetpwnam,
81	vpwdb,
82	vsetgrent,
83	vendgrent,
84	vgetgrent,
85	vgetgrgid,
86	vgetgrnam,
87	vgrdb
88};
89
90static struct cargs arglist;
91
92static int      getindex(const char *words[], const char *word);
93static void     cmdhelp(int mode, int which);
94
95
96int
97main(int argc, char *argv[])
98{
99	int             ch;
100	int             mode = -1;
101	int             which = -1;
102	char		*config = NULL;
103	struct userconf *cnf;
104
105	static const char *opts[W_NUM][M_NUM] =
106	{
107		{ /* user */
108			"V:C:qn:u:c:d:e:p:g:G:mk:s:oL:i:w:h:Db:NPy:Y",
109			"V:C:qn:u:rY",
110			"V:C:qn:u:c:d:e:p:g:G:ml:k:s:w:L:h:FNPY",
111			"V:C:qn:u:FPa7",
112			"V:C:q",
113			"V:C:q",
114			"V:C:q"
115		},
116		{ /* grp  */
117			"V:C:qn:g:h:M:pNPY",
118			"V:C:qn:g:Y",
119			"V:C:qn:g:l:h:FM:m:NPY",
120			"V:C:qn:g:FPa",
121			"V:C:q"
122		 }
123	};
124
125	static int      (*funcs[W_NUM]) (struct userconf * _cnf, int _mode, struct cargs * _args) =
126	{			/* Request handlers */
127		pw_user,
128		pw_group
129	};
130
131	umask(0);		/* We wish to handle this manually */
132	LIST_INIT(&arglist);
133
134	/*
135	 * Break off the first couple of words to determine what exactly
136	 * we're being asked to do
137	 */
138	while (argc > 1) {
139		int             tmp;
140
141		if (*argv[1] == '-') {
142			/*
143			 * Special case, allow pw -V<dir> <operation> [args] for scripts etc.
144			 */
145			if (argv[1][1] == 'V') {
146				optarg = &argv[1][2];
147				if (*optarg == '\0') {
148					optarg = argv[2];
149					++argv;
150					--argc;
151				}
152				addarg(&arglist, 'V', optarg);
153			} else
154				break;
155		}
156		else if (mode == -1 && (tmp = getindex(Modes, argv[1])) != -1)
157			mode = tmp;
158		else if (which == -1 && (tmp = getindex(Which, argv[1])) != -1)
159			which = tmp;
160		else if ((mode == -1 && which == -1) &&
161			 ((tmp = getindex(Combo1, argv[1])) != -1 ||
162			  (tmp = getindex(Combo2, argv[1])) != -1)) {
163			which = tmp / M_NUM;
164			mode = tmp % M_NUM;
165		} else if (strcmp(argv[1], "help") == 0 && argv[2] == NULL)
166			cmdhelp(mode, which);
167		else if (which != -1 && mode != -1)
168			addarg(&arglist, 'n', argv[1]);
169		else
170			errx(EX_USAGE, "unknown keyword `%s'", argv[1]);
171		++argv;
172		--argc;
173	}
174
175	/*
176	 * Bail out unless the user is specific!
177	 */
178	if (mode == -1 || which == -1)
179		cmdhelp(mode, which);
180
181	/*
182	 * We know which mode we're in and what we're about to do, so now
183	 * let's dispatch the remaining command line args in a genric way.
184	 */
185	optarg = NULL;
186
187	while ((ch = getopt(argc, argv, opts[which][mode])) != -1) {
188		if (ch == '?')
189			errx(EX_USAGE, "unknown switch");
190		else
191			addarg(&arglist, ch, optarg);
192		optarg = NULL;
193	}
194
195	/*
196	 * Must be root to attempt an update
197	 */
198	if (geteuid() != 0 && mode != M_PRINT && mode != M_NEXT && getarg(&arglist, 'N')==NULL)
199		errx(EX_NOPERM, "you must be root to run this program");
200
201	/*
202	 * We should immediately look for the -q 'quiet' switch so that we
203	 * don't bother with extraneous errors
204	 */
205	if (getarg(&arglist, 'q') != NULL)
206		freopen("/dev/null", "w", stderr);
207
208	/*
209	 * Set our base working path if not overridden
210	 */
211
212	config = getarg(&arglist, 'C') ? getarg(&arglist, 'C')->val : NULL;
213
214	if (getarg(&arglist, 'V') != NULL) {
215		char * etcpath = getarg(&arglist, 'V')->val;
216		if (*etcpath) {
217			if (config == NULL) {	/* Only override config location if -C not specified */
218				config = malloc(MAXPATHLEN);
219				snprintf(config, MAXPATHLEN, "%s/pw.conf", etcpath);
220			}
221			memcpy(&PWF, &VPWF, sizeof PWF);
222			setpwdir(etcpath);
223			setgrdir(etcpath);
224		}
225	}
226
227	/*
228	 * Now, let's do the common initialisation
229	 */
230	cnf = read_userconfig(config);
231
232	ch = funcs[which] (cnf, mode, &arglist);
233
234	/*
235	 * If everything went ok, and we've been asked to update
236	 * the NIS maps, then do it now
237	 */
238	if (ch == EXIT_SUCCESS && getarg(&arglist, 'Y') != NULL) {
239		pid_t	pid;
240
241		fflush(NULL);
242		if (chdir(_PATH_YP) == -1)
243			warn("chdir(" _PATH_YP ")");
244		else if ((pid = fork()) == -1)
245			warn("fork()");
246		else if (pid == 0) {
247			/* Is make anywhere else? */
248			execlp("/usr/bin/make", "make", NULL);
249			_exit(1);
250		} else {
251			int   i;
252			waitpid(pid, &i, 0);
253			if ((i = WEXITSTATUS(i)) != 0)
254				errx(ch, "make exited with status %d", i);
255			else
256				pw_log(cnf, mode, which, "NIS maps updated");
257		}
258	}
259	return ch;
260}
261
262
263static int
264getindex(const char *words[], const char *word)
265{
266	int             i = 0;
267
268	while (words[i]) {
269		if (strcmp(words[i], word) == 0)
270			return i;
271		i++;
272	}
273	return -1;
274}
275
276
277/*
278 * This is probably an overkill for a cmdline help system, but it reflects
279 * the complexity of the command line.
280 */
281
282static void
283cmdhelp(int mode, int which)
284{
285	if (which == -1)
286		fprintf(stderr, "usage:\n  pw [user|group|lock|unlock] [add|del|mod|show|next] [help|switches/values]\n");
287	else if (mode == -1)
288		fprintf(stderr, "usage:\n  pw %s [add|del|mod|show|next] [help|switches/values]\n", Which[which]);
289	else {
290
291		/*
292		 * We need to give mode specific help
293		 */
294		static const char *help[W_NUM][M_NUM] =
295		{
296			{
297				"usage: pw useradd [name] [switches]\n"
298				"\t-V etcdir      alternate /etc location\n"
299				"\t-C config      configuration file\n"
300				"\t-q             quiet operation\n"
301				"  Adding users:\n"
302				"\t-n name        login name\n"
303				"\t-u uid         user id\n"
304				"\t-c comment     user name/comment\n"
305				"\t-d directory   home directory\n"
306				"\t-e date        account expiry date\n"
307				"\t-p date        password expiry date\n"
308				"\t-g grp         initial group\n"
309				"\t-G grp1,grp2   additional groups\n"
310				"\t-m [ -k dir ]  create and set up home\n"
311				"\t-s shell       name of login shell\n"
312				"\t-o             duplicate uid ok\n"
313				"\t-L class       user class\n"
314				"\t-h fd          read password on fd\n"
315				"\t-Y             update NIS maps\n"
316				"\t-N             no update\n"
317				"  Setting defaults:\n"
318				"\t-V etcdir      alternate /etc location\n"
319			        "\t-D             set user defaults\n"
320				"\t-b dir         default home root dir\n"
321				"\t-e period      default expiry period\n"
322				"\t-p period      default password change period\n"
323				"\t-g group       default group\n"
324				"\t-G grp1,grp2   additional groups\n"
325				"\t-L class       default user class\n"
326				"\t-k dir         default home skeleton\n"
327				"\t-u min,max     set min,max uids\n"
328				"\t-i min,max     set min,max gids\n"
329				"\t-w method      set default password method\n"
330				"\t-s shell       default shell\n"
331				"\t-y path        set NIS passwd file path\n",
332				"usage: pw userdel [uid|name] [switches]\n"
333				"\t-V etcdir      alternate /etc location\n"
334				"\t-n name        login name\n"
335				"\t-u uid         user id\n"
336				"\t-Y             update NIS maps\n"
337				"\t-r             remove home & contents\n",
338				"usage: pw usermod [uid|name] [switches]\n"
339				"\t-V etcdir      alternate /etc location\n"
340				"\t-C config      configuration file\n"
341				"\t-q             quiet operation\n"
342				"\t-F             force add if no user\n"
343				"\t-n name        login name\n"
344				"\t-u uid         user id\n"
345				"\t-c comment     user name/comment\n"
346				"\t-d directory   home directory\n"
347				"\t-e date        account expiry date\n"
348				"\t-p date        password expiry date\n"
349				"\t-g grp         initial group\n"
350				"\t-G grp1,grp2   additional groups\n"
351				"\t-l name        new login name\n"
352				"\t-L class       user class\n"
353				"\t-m [ -k dir ]  create and set up home\n"
354				"\t-s shell       name of login shell\n"
355				"\t-w method      set new password using method\n"
356				"\t-h fd          read password on fd\n"
357				"\t-Y             update NIS maps\n"
358				"\t-N             no update\n",
359				"usage: pw usershow [uid|name] [switches]\n"
360				"\t-V etcdir      alternate /etc location\n"
361				"\t-n name        login name\n"
362				"\t-u uid         user id\n"
363				"\t-F             force print\n"
364				"\t-P             prettier format\n"
365				"\t-a             print all users\n"
366				"\t-7             print in v7 format\n",
367				"usage: pw usernext [switches]\n"
368				"\t-V etcdir      alternate /etc location\n"
369				"\t-C config      configuration file\n"
370			},
371			{
372				"usage: pw groupadd [group|gid] [switches]\n"
373				"\t-V etcdir      alternate /etc location\n"
374				"\t-C config      configuration file\n"
375				"\t-q             quiet operation\n"
376				"\t-n group       group name\n"
377				"\t-g gid         group id\n"
378				"\t-M usr1,usr2   add users as group members\n"
379				"\t-o             duplicate gid ok\n"
380				"\t-Y             update NIS maps\n"
381				"\t-N             no update\n",
382				"usage: pw groupdel [group|gid] [switches]\n"
383				"\t-V etcdir      alternate /etc location\n"
384				"\t-n name        group name\n"
385				"\t-g gid         group id\n"
386				"\t-Y             update NIS maps\n",
387				"usage: pw groupmod [group|gid] [switches]\n"
388				"\t-V etcdir      alternate /etc location\n"
389				"\t-C config      configuration file\n"
390				"\t-q             quiet operation\n"
391				"\t-F             force add if not exists\n"
392				"\t-n name        group name\n"
393				"\t-g gid         group id\n"
394				"\t-M usr1,usr2   replaces users as group members\n"
395				"\t-m usr1,usr2   add users as group members\n"
396				"\t-l name        new group name\n"
397				"\t-Y             update NIS maps\n"
398				"\t-N             no update\n",
399				"usage: pw groupshow [group|gid] [switches]\n"
400				"\t-V etcdir      alternate /etc location\n"
401				"\t-n name        group name\n"
402				"\t-g gid         group id\n"
403				"\t-F             force print\n"
404				"\t-P             prettier format\n"
405				"\t-a             print all accounting groups\n",
406				"usage: pw groupnext [switches]\n"
407				"\t-V etcdir      alternate /etc location\n"
408				"\t-C config      configuration file\n"
409			}
410		};
411
412		fprintf(stderr, help[which][mode]);
413	}
414	exit(EXIT_FAILURE);
415}
416
417struct carg    *
418getarg(struct cargs * _args, int ch)
419{
420	struct carg    *c = _args->lh_first;
421
422	while (c != NULL && c->ch != ch)
423		c = c->list.le_next;
424	return c;
425}
426
427struct carg    *
428addarg(struct cargs * _args, int ch, char *argstr)
429{
430	struct carg    *ca = malloc(sizeof(struct carg));
431
432	if (ca == NULL)
433		errx(EX_OSERR, "out of memory");
434	ca->ch = ch;
435	ca->val = argstr;
436	LIST_INSERT_HEAD(_args, ca, list);
437	return ca;
438}
439