summaryrefslogtreecommitdiffstats
path: root/usr.sbin/pw/pw.c
blob: 01fd919f833b6bb9f10598374e9c88ae223cb216 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
/*-
 * Copyright (c) 1996 by David L. Nugent <davidn@blaze.net.au>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer as
 *    the first lines of this file unmodified.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by David L. Nugent.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DAVID L. NUGENT ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	$Id$
 */

#include "pw.h"

static char    *progname = "pw";

const char     *Modes[] = {"add", "del", "mod", "show", NULL};
const char     *Which[] = {"user", "group", NULL};
static const char *Combo1[] = {"useradd", "userdel", "usermod", "usershow",
	"groupadd", "groupdel", "groupmod", "groupshow",
NULL};
static const char *Combo2[] = {"adduser", "deluser", "moduser", "showuser",
	"addgroup", "delgroup", "modgroup", "showgroup",
NULL};

static struct cargs arglist;

static int      getindex(const char *words[], const char *word);
static void     cmdhelp(int mode, int which);


int
main(int argc, char *argv[])
{
	int             ch;
	int             mode = -1;
	int             which = -1;
	struct userconf *cnf;

	static const char *opts[W_NUM][M_NUM] =
	{
	 /* user */ {"C:qn:u:c:d:e:p:g:G:mk:s:oL:i:w:h:Db", "C:qn:u:r", "C:qn:u:c:d:e:p:g:G:mk:s:L:h:F", "C:qn:u:Fpa"},
	 /* grp  */ {"C:qn:g:h:p", "C:qn:g:", "C:qn:g:l:h:F", "C:qn:g:Fpa"}
	};

	static int      (*funcs[W_NUM]) (struct userconf * _cnf, int _mode, struct cargs * _args) =
	{			/* Request handlers */
		pw_user,
		pw_group
	};

	umask(0);		/* We wish to handle this manually */
	progname = strrchr(argv[0], '/');
	if (progname != NULL)
		++progname;
	else
		progname = argv[0];

	LIST_INIT(&arglist);

	/*
	 * Break off the first couple of words to determine what exactly
	 * we're being asked to do
	 */
	while (argc > 1 && *argv[1] != '-') {
		int             tmp;

		if ((tmp = getindex(Modes, argv[1])) != -1)
			mode = tmp;
		else if ((tmp = getindex(Which, argv[1])) != -1)
			which = tmp;
		else if ((tmp = getindex(Combo1, argv[1])) != -1 || (tmp = getindex(Combo2, argv[1])) != -1) {
			which = tmp / M_NUM;
			mode = tmp % M_NUM;
		} else if (strcmp(argv[1], "help") == 0)
			cmdhelp(mode, which);
		else if (which != -1 && mode != -1 && arglist.lh_first == NULL)
			addarg(&arglist, 'n', argv[1]);
		else
			cmderr(X_CMDERR, "Unknown keyword `%s'\n", argv[1]);
		++argv;
		--argc;
	}

	/*
	 * Bail out unless the user is specific!
	 */
	if (mode == -1 || which == -1)
		cmdhelp(mode, which);

	/*
	 * Must be root to attempt an update
	 */
	if (getuid() != 0 && mode != M_PRINT)
		cmderr(X_PERMERR, "you must be root to run this program\n");

	/*
	 * We know which mode we're in and what we're about to do, so now
	 * let's dispatch the remaining command line args in a genric way.
	 */
	argv[0] = progname;	/* Preserve this */
	optarg = NULL;

	while ((ch = getopt(argc, argv, opts[which][mode])) != -1) {
		if (ch == '?')
			cmderr(X_CMDERR, NULL);
		else
			addarg(&arglist, ch, optarg);
		optarg = NULL;
	}

	/*
	 * We should immediately look for the -q 'quiet' switch so that we
	 * don't bother with extraneous errors
	 */
	if (getarg(&arglist, 'q') != NULL)
		freopen("/dev/null", "w", stderr);

	ch = X_CMDERR;

	/*
	 * Now, let's do the common initialisation
	 */
	cnf = read_userconfig(getarg(&arglist, 'C') ? getarg(&arglist, 'C')->val : NULL);

	if (funcs[which])
		ch = funcs[which] (cnf, mode, &arglist);
	else
		fprintf(stderr, "%s: %s[%s] not yet implemented.\n", progname, Which[which], Modes[mode]);

	return ch;
}

static int
getindex(const char *words[], const char *word)
{
	int             i = 0;

	while (words[i]) {
		if (strcmp(words[i], word) == 0)
			return i;
		i++;
	}
	return -1;
}


/*
 * This is probably an overkill for a cmdline help system, but it reflects
 * the complexity of the command line.
 */

static void
banner(void)
{
	fprintf(stderr, "%s: ", progname);
}

void
cmderr(int ec, char const * fmt,...)
{
	if (fmt != NULL) {
		va_list         argp;

		banner();
		va_start(argp, fmt);
		vfprintf(stderr, fmt, argp);
		va_end(argp);
	}
	exit(ec);
}

static void
cmdhelp(int mode, int which)
{
	banner();
	if (which == -1)
		fprintf(stderr, "usage: %s [user|group] [add|del|mod|show] [ help | switches/values ]\n", progname);
	else if (mode == -1)
		fprintf(stderr, "usage: %s %s [add|del|mod] [ help | switches/values ]\n", progname, Which[which]);
	else {

		/*
		 * We need to give mode specific help
		 */
		static const char *help[W_NUM][M_NUM] =
		{
			{
				"usage: %s useradd [name] [switches]\n"
				"\t-C config      configuration file\n"
				"\t-q             quiet operation\n"
				"  Adding users:\n"
				"\t-n name        login name\n"
				"\t-u uid         user id\n"
				"\t-c comment     user name/comment\n"
				"\t-d directory   home directory\n"
				"\t-e date        account expiry date\n"
				"\t-p date        password expiry date\n"
				"\t-g grp         initial group\n"
				"\t-G grp1,grp2   additional groups\n"
				"\t-m [ -k dir ]  create and set up home\n"
				"\t-s shell       name of login shell\n"
				"\t-o             duplicate uid ok\n"
				"\t-L class       user class\n"
				"\t-h fd          read password on fd\n"
				"  Setting defaults:\n"
				"\t-D             set user defaults\n"
				"\t-b dir         default home root dir\n"
				"\t-e period      default expiry period\n"
				"\t-p period      default password change period\n"
				"\t-g group       default group\n"
				"\t-G grp1,grp2   additional groups\n"
				"\t-L class       default user class\n"
				"\t-k dir         default home skeleton\n"
				"\t-u min,max     set min,max uids\n"
				"\t-i min,max     set min,max gids\n"
				"\t-w method      set default password method\n"
				"\t-s shell       default shell\n",
				"usage: %s userdel [uid|name] [switches]\n"
				"\t-n name        login name\n"
				"\t-u uid         user id\n"
				"\t-r             remove home & contents\n",
				"usage: %s usermod [uid|name] [switches]\n"
				"\t-C config      configuration file\n"
				"\t-q             quiet operation\n"
				"\t-F             force add if no user\n"
				"\t-n name        login name\n"
				"\t-u uid         user id\n"
				"\t-c comment     user name/comment\n"
				"\t-d directory   home directory\n"
				"\t-e date        account expiry date\n"
				"\t-p date        password expiry date\n"
				"\t-g grp         initial group\n"
				"\t-G grp1,grp2   additional groups\n"
				"\t-l name        new login name\n"
				"\t-L class       user class\n"
				"\t-m [ -k dir ]  create and set up home\n"
				"\t-s shell       name of login shell\n"
				"\t-h fd          read password on fd\n",
				"usage: %s usershow [uid|name] [switches]\n"
				"\t-n name        login name\n"
				"\t-u uid         user id\n"
				"\t-F             force print\n"
				"\t-p             prettier format\n"
				"\t-a             print all users\n"
			},
			{
				"usage: %s groupadd [group|gid] [switches]\n"
				"\t-C config      configuration file\n"
				"\t-q             quiet operation\n"
				"\t-n group       group name\n"
				"\t-g gid         group id\n"
				"\t-o             duplicate gid ok\n",
				"usage: %s groupdel [group|gid] [switches]\n"
				"\t-n name        group name\n"
				"\t-g gid         group id\n",
				"usage: %s groupmod [group|gid] [switches]\n"
				"\t-C config      configuration file\n"
				"\t-q             quiet operation\n"
				"\t-F             force add if not exists\n"
				"\t-n name        group name\n"
				"\t-g gid         group id\n"
				"\t-l name        new group name\n",
				"usage: %s groupshow [group|gid] [switches]\n"
				"\t-n name        group name\n"
				"\t-g gid         group id\n"
				"\t-F             force print\n"
				"\t-p             prettier format\n"
				"\t-a             print all accounting groups\n"
			}
		};

		fprintf(stderr, help[which][mode], progname);
	}
	exit(X_CMDERR);
}

struct carg    *
getarg(struct cargs * _args, int ch)
{
	struct carg    *c = _args->lh_first;

	while (c != NULL && c->ch != ch)
		c = c->list.le_next;
	return c;
}

struct carg    *
addarg(struct cargs * _args, int ch, char *argstr)
{
	struct carg    *ca = malloc(sizeof(struct carg));

	if (ca == NULL)
		cmderr(X_MEMERR, "Abort - out of memory\n");
	ca->ch = ch;
	ca->val = argstr;
	LIST_INSERT_HEAD(_args, ca, list);
	return ca;
}
OpenPOWER on IntegriCloud