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Validate input of pw usermod -h and pwusermod -H
[pw-darwin.git] / pw / pw.c
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
28 static const char rcsid[] =
29 "$FreeBSD$";
30 #endif /* not lint */
31
32 #include <err.h>
33 #include <fcntl.h>
34 #include <locale.h>
35 #include <paths.h>
36 #include <stdbool.h>
37 #include <sys/wait.h>
38 #include "pw.h"
39
40 #if !defined(_PATH_YP)
41 #define _PATH_YP "/var/yp/"
42 #endif
43 const char *Modes[] = {
44 "add", "del", "mod", "show", "next",
45 NULL};
46 const char *Which[] = {"user", "group", NULL};
47 static const char *Combo1[] = {
48 "useradd", "userdel", "usermod", "usershow", "usernext",
49 "lock", "unlock",
50 "groupadd", "groupdel", "groupmod", "groupshow", "groupnext",
51 NULL};
52 static const char *Combo2[] = {
53 "adduser", "deluser", "moduser", "showuser", "nextuser",
54 "lock", "unlock",
55 "addgroup", "delgroup", "modgroup", "showgroup", "nextgroup",
56 NULL};
57
58 struct pwf PWF =
59 {
60 PWF_REGULAR,
61 setpwent,
62 endpwent,
63 getpwent,
64 getpwuid,
65 getpwnam,
66 setgrent,
67 endgrent,
68 getgrent,
69 getgrgid,
70 getgrnam,
71
72 };
73 struct pwf VPWF =
74 {
75 PWF_ALT,
76 vsetpwent,
77 vendpwent,
78 vgetpwent,
79 vgetpwuid,
80 vgetpwnam,
81 vsetgrent,
82 vendgrent,
83 vgetgrent,
84 vgetgrgid,
85 vgetgrnam,
86 };
87
88 struct pwconf conf;
89
90 static struct cargs arglist;
91
92 static int getindex(const char *words[], const char *word);
93 static void cmdhelp(int mode, int which);
94
95
96 int
97 main(int argc, char *argv[])
98 {
99 int ch;
100 int mode = -1;
101 int which = -1;
102 long id = -1;
103 char *config = NULL;
104 struct stat st;
105 const char *errstr;
106 char arg, *name;
107 bool relocated, nis;
108
109 static const char *opts[W_NUM][M_NUM] =
110 {
111 { /* user */
112 "R:V:C:qn:u:c:d:e:p:g:G:mM:k:s:oL:i:w:h:H:Db:NPy:Y",
113 "R:V:C:qn:u:rY",
114 "R:V:C:qn:u:c:d:e:p:g:G:mM:l:k:s:w:L:h:H:FNPY",
115 "R:V:C:qn:u:FPa7",
116 "R:V:C:q",
117 "R:V:C:q",
118 "R:V:C:q"
119 },
120 { /* grp */
121 "R:V:C:qn:g:h:H:M:opNPY",
122 "R:V:C:qn:g:Y",
123 "R:V:C:qn:d:g:l:h:H:FM:m:NPY",
124 "R:V:C:qn:g:FPa",
125 "R:V:C:q"
126 }
127 };
128
129 static int (*funcs[W_NUM]) (int _mode, char *_name, long _id,
130 struct cargs * _args) =
131 { /* Request handlers */
132 pw_user,
133 pw_group
134 };
135
136 name = NULL;
137 relocated = nis = false;
138 memset(&conf, 0, sizeof(conf));
139 strlcpy(conf.etcpath, _PATH_PWD, sizeof(conf.etcpath));
140 conf.fd = -1;
141
142 LIST_INIT(&arglist);
143
144 (void)setlocale(LC_ALL, "");
145
146 /*
147 * Break off the first couple of words to determine what exactly
148 * we're being asked to do
149 */
150 while (argc > 1) {
151 int tmp;
152
153 if (*argv[1] == '-') {
154 /*
155 * Special case, allow pw -V<dir> <operation> [args] for scripts etc.
156 */
157 arg = argv[1][1];
158 if (arg == 'V' || arg == 'R') {
159 if (relocated)
160 errx(EXIT_FAILURE, "Both '-R' and '-V' "
161 "specified, only one accepted");
162 relocated = true;
163 optarg = &argv[1][2];
164 if (*optarg == '\0') {
165 if (stat(argv[2], &st) != 0)
166 errx(EX_OSFILE, \
167 "no such directory `%s'",
168 argv[2]);
169 if (!S_ISDIR(st.st_mode))
170 errx(EX_OSFILE, "`%s' not a "
171 "directory", argv[2]);
172 optarg = argv[2];
173 ++argv;
174 --argc;
175 }
176 memcpy(&PWF, &VPWF, sizeof PWF);
177 if (arg == 'R') {
178 strlcpy(conf.rootdir, optarg,
179 sizeof(conf.rootdir));
180 PWF._altdir = PWF_ROOTDIR;
181 }
182 snprintf(conf.etcpath, sizeof(conf.etcpath),
183 "%s%s", optarg, arg == 'R' ? "/etc" : "");
184 } else
185 break;
186 }
187 else if (mode == -1 && (tmp = getindex(Modes, argv[1])) != -1)
188 mode = tmp;
189 else if (which == -1 && (tmp = getindex(Which, argv[1])) != -1)
190 which = tmp;
191 else if ((mode == -1 && which == -1) &&
192 ((tmp = getindex(Combo1, argv[1])) != -1 ||
193 (tmp = getindex(Combo2, argv[1])) != -1)) {
194 which = tmp / M_NUM;
195 mode = tmp % M_NUM;
196 } else if (strcmp(argv[1], "help") == 0 && argv[2] == NULL)
197 cmdhelp(mode, which);
198 else if (which != -1 && mode != -1) {
199 if (strspn(argv[1], "0123456789") == strlen(argv[1])) {
200 id = strtonum(argv[1], 0, LONG_MAX, &errstr);
201 if (errstr != NULL)
202 errx(EX_USAGE, "Bad id '%s': %s",
203 argv[1], errstr);
204 } else
205 name = argv[1];
206 } else
207 errx(EX_USAGE, "unknown keyword `%s'", argv[1]);
208 ++argv;
209 --argc;
210 }
211
212 /*
213 * Bail out unless the user is specific!
214 */
215 if (mode == -1 || which == -1)
216 cmdhelp(mode, which);
217
218 /*
219 * We know which mode we're in and what we're about to do, so now
220 * let's dispatch the remaining command line args in a genric way.
221 */
222 optarg = NULL;
223
224 while ((ch = getopt(argc, argv, opts[which][mode])) != -1) {
225 switch (ch) {
226 case '?':
227 errx(EX_USAGE, "unknown switch");
228 break;
229 case '7':
230 conf.v7 = true;
231 break;
232 case 'C':
233 conf.config = optarg;
234 config = conf.config;
235 break;
236 case 'N':
237 conf.dryrun = true;
238 break;
239 case 'l':
240 if (strlen(optarg) >= MAXLOGNAME)
241 errx(EX_USAGE, "new name too long: %s", optarg);
242 conf.newname = optarg;
243 break;
244 case 'P':
245 conf.pretty = true;
246 break;
247 case 'Y':
248 nis = true;
249 break;
250 case 'g':
251 if (which == 0) { /* for user* */
252 addarg(&arglist, 'g', optarg);
253 break;
254 }
255 if (strspn(optarg, "0123456789") != strlen(optarg))
256 errx(EX_USAGE, "-g expects a number");
257 id = strtonum(optarg, 0, LONG_MAX, &errstr);
258 if (errstr != NULL)
259 errx(EX_USAGE, "Bad id '%s': %s", optarg,
260 errstr);
261 break;
262 case 'u':
263 if (strspn(optarg, "0123456789,") != strlen(optarg))
264 errx(EX_USAGE, "-u expects a number");
265 if (strchr(optarg, ',') != NULL) {
266 addarg(&arglist, 'u', optarg);
267 break;
268 }
269 id = strtonum(optarg, 0, LONG_MAX, &errstr);
270 if (errstr != NULL)
271 errx(EX_USAGE, "Bad id '%s': %s", optarg,
272 errstr);
273 break;
274 case 'n':
275 if (strspn(optarg, "0123456789") != strlen(optarg)) {
276 name = optarg;
277 break;
278 }
279 id = strtonum(optarg, 0, LONG_MAX, &errstr);
280 if (errstr != NULL)
281 errx(EX_USAGE, "Bad id '%s': %s", optarg,
282 errstr);
283 break;
284 case 'H':
285 if (conf.fd != -1)
286 errx(EX_USAGE, "'-h' and '-H' are mutually "
287 "exclusive options");
288 conf.precrypted = true;
289 if (strspn(optarg, "0123456789") != strlen(optarg))
290 errx(EX_USAGE, "'-H' expects a file descriptor");
291
292 conf.fd = strtonum(optarg, 0, INT_MAX, &errstr);
293 if (errstr != NULL)
294 errx(EX_USAGE, "Bad file descriptor '%s': %s",
295 optarg, errstr);
296 break;
297 case 'h':
298 if (conf.fd != -1)
299 errx(EX_USAGE, "'-h' and '-H' are mutually "
300 "exclusive options");
301
302 if (strcmp(optarg, "-") == 0)
303 conf.fd = '-';
304 else if (strspn(optarg, "0123456789") == strlen(optarg)) {
305 conf.fd = strtonum(optarg, 0, INT_MAX, &errstr);
306 if (errstr != NULL)
307 errx(EX_USAGE, "'-h' expects a "
308 "file descriptor or '-'");
309 } else
310 errx(EX_USAGE, "'-h' expects a file "
311 "descriptor or '-'");
312 break;
313 case 'o':
314 conf.checkduplicate = true;
315 break;
316 default:
317 addarg(&arglist, ch, optarg);
318 break;
319 }
320 optarg = NULL;
321 }
322
323 if (name != NULL && strlen(name) >= MAXLOGNAME)
324 errx(EX_USAGE, "name too long: %s", name);
325
326 /*
327 * Must be root to attempt an update
328 */
329 if (geteuid() != 0 && mode != M_PRINT && mode != M_NEXT && !conf.dryrun)
330 errx(EX_NOPERM, "you must be root to run this program");
331
332 /*
333 * We should immediately look for the -q 'quiet' switch so that we
334 * don't bother with extraneous errors
335 */
336 if (getarg(&arglist, 'q') != NULL)
337 freopen(_PATH_DEVNULL, "w", stderr);
338
339 /*
340 * Set our base working path if not overridden
341 */
342
343 if (config == NULL) { /* Only override config location if -C not specified */
344 asprintf(&config, "%s/pw.conf", conf.etcpath);
345 if (config == NULL)
346 errx(EX_OSERR, "out of memory");
347 }
348
349 /*
350 * Now, let's do the common initialisation
351 */
352 conf.userconf = read_userconfig(config);
353
354 ch = funcs[which] (mode, name, id, &arglist);
355
356 /*
357 * If everything went ok, and we've been asked to update
358 * the NIS maps, then do it now
359 */
360 if (ch == EXIT_SUCCESS && nis) {
361 pid_t pid;
362
363 fflush(NULL);
364 if (chdir(_PATH_YP) == -1)
365 warn("chdir(" _PATH_YP ")");
366 else if ((pid = fork()) == -1)
367 warn("fork()");
368 else if (pid == 0) {
369 /* Is make anywhere else? */
370 execlp("/usr/bin/make", "make", (char *)NULL);
371 _exit(1);
372 } else {
373 int i;
374 waitpid(pid, &i, 0);
375 if ((i = WEXITSTATUS(i)) != 0)
376 errx(ch, "make exited with status %d", i);
377 else
378 pw_log(conf.userconf, mode, which, "NIS maps updated");
379 }
380 }
381 return ch;
382 }
383
384
385 static int
386 getindex(const char *words[], const char *word)
387 {
388 int i = 0;
389
390 while (words[i]) {
391 if (strcmp(words[i], word) == 0)
392 return i;
393 i++;
394 }
395 return -1;
396 }
397
398
399 /*
400 * This is probably an overkill for a cmdline help system, but it reflects
401 * the complexity of the command line.
402 */
403
404 static void
405 cmdhelp(int mode, int which)
406 {
407 if (which == -1)
408 fprintf(stderr, "usage:\n pw [user|group|lock|unlock] [add|del|mod|show|next] [help|switches/values]\n");
409 else if (mode == -1)
410 fprintf(stderr, "usage:\n pw %s [add|del|mod|show|next] [help|switches/values]\n", Which[which]);
411 else {
412
413 /*
414 * We need to give mode specific help
415 */
416 static const char *help[W_NUM][M_NUM] =
417 {
418 {
419 "usage: pw useradd [name] [switches]\n"
420 "\t-V etcdir alternate /etc location\n"
421 "\t-R rootir alternate root directory\n"
422 "\t-C config configuration file\n"
423 "\t-q quiet operation\n"
424 " Adding users:\n"
425 "\t-n name login name\n"
426 "\t-u uid user id\n"
427 "\t-c comment user name/comment\n"
428 "\t-d directory home directory\n"
429 "\t-e date account expiry date\n"
430 "\t-p date password expiry date\n"
431 "\t-g grp initial group\n"
432 "\t-G grp1,grp2 additional groups\n"
433 "\t-m [ -k dir ] create and set up home\n"
434 "\t-M mode home directory permissions\n"
435 "\t-s shell name of login shell\n"
436 "\t-o duplicate uid ok\n"
437 "\t-L class user class\n"
438 "\t-h fd read password on fd\n"
439 "\t-H fd read encrypted password on fd\n"
440 "\t-Y update NIS maps\n"
441 "\t-N no update\n"
442 " Setting defaults:\n"
443 "\t-V etcdir alternate /etc location\n"
444 "\t-R rootir alternate root directory\n"
445 "\t-D set user defaults\n"
446 "\t-b dir default home root dir\n"
447 "\t-e period default expiry period\n"
448 "\t-p period default password change period\n"
449 "\t-g group default group\n"
450 "\t-G grp1,grp2 additional groups\n"
451 "\t-L class default user class\n"
452 "\t-k dir default home skeleton\n"
453 "\t-M mode home directory permissions\n"
454 "\t-u min,max set min,max uids\n"
455 "\t-i min,max set min,max gids\n"
456 "\t-w method set default password method\n"
457 "\t-s shell default shell\n"
458 "\t-y path set NIS passwd file path\n",
459 "usage: pw userdel [uid|name] [switches]\n"
460 "\t-V etcdir alternate /etc location\n"
461 "\t-R rootir alternate root directory\n"
462 "\t-n name login name\n"
463 "\t-u uid user id\n"
464 "\t-Y update NIS maps\n"
465 "\t-r remove home & contents\n",
466 "usage: pw usermod [uid|name] [switches]\n"
467 "\t-V etcdir alternate /etc location\n"
468 "\t-R rootir alternate root directory\n"
469 "\t-C config configuration file\n"
470 "\t-q quiet operation\n"
471 "\t-F force add if no user\n"
472 "\t-n name login name\n"
473 "\t-u uid user id\n"
474 "\t-c comment user name/comment\n"
475 "\t-d directory home directory\n"
476 "\t-e date account expiry date\n"
477 "\t-p date password expiry date\n"
478 "\t-g grp initial group\n"
479 "\t-G grp1,grp2 additional groups\n"
480 "\t-l name new login name\n"
481 "\t-L class user class\n"
482 "\t-m [ -k dir ] create and set up home\n"
483 "\t-M mode home directory permissions\n"
484 "\t-s shell name of login shell\n"
485 "\t-w method set new password using method\n"
486 "\t-h fd read password on fd\n"
487 "\t-H fd read encrypted password on fd\n"
488 "\t-Y update NIS maps\n"
489 "\t-N no update\n",
490 "usage: pw usershow [uid|name] [switches]\n"
491 "\t-V etcdir alternate /etc location\n"
492 "\t-R rootir alternate root directory\n"
493 "\t-n name login name\n"
494 "\t-u uid user id\n"
495 "\t-F force print\n"
496 "\t-P prettier format\n"
497 "\t-a print all users\n"
498 "\t-7 print in v7 format\n",
499 "usage: pw usernext [switches]\n"
500 "\t-V etcdir alternate /etc location\n"
501 "\t-R rootir alternate root directory\n"
502 "\t-C config configuration file\n"
503 "\t-q quiet operation\n",
504 "usage pw: lock [switches]\n"
505 "\t-V etcdir alternate /etc locations\n"
506 "\t-C config configuration file\n"
507 "\t-q quiet operation\n",
508 "usage pw: unlock [switches]\n"
509 "\t-V etcdir alternate /etc locations\n"
510 "\t-C config configuration file\n"
511 "\t-q quiet operation\n"
512 },
513 {
514 "usage: pw groupadd [group|gid] [switches]\n"
515 "\t-V etcdir alternate /etc location\n"
516 "\t-R rootir alternate root directory\n"
517 "\t-C config configuration file\n"
518 "\t-q quiet operation\n"
519 "\t-n group group name\n"
520 "\t-g gid group id\n"
521 "\t-M usr1,usr2 add users as group members\n"
522 "\t-o duplicate gid ok\n"
523 "\t-Y update NIS maps\n"
524 "\t-N no update\n",
525 "usage: pw groupdel [group|gid] [switches]\n"
526 "\t-V etcdir alternate /etc location\n"
527 "\t-R rootir alternate root directory\n"
528 "\t-n name group name\n"
529 "\t-g gid group id\n"
530 "\t-Y update NIS maps\n",
531 "usage: pw groupmod [group|gid] [switches]\n"
532 "\t-V etcdir alternate /etc location\n"
533 "\t-R rootir alternate root directory\n"
534 "\t-C config configuration file\n"
535 "\t-q quiet operation\n"
536 "\t-F force add if not exists\n"
537 "\t-n name group name\n"
538 "\t-g gid group id\n"
539 "\t-M usr1,usr2 replaces users as group members\n"
540 "\t-m usr1,usr2 add users as group members\n"
541 "\t-d usr1,usr2 delete users as group members\n"
542 "\t-l name new group name\n"
543 "\t-Y update NIS maps\n"
544 "\t-N no update\n",
545 "usage: pw groupshow [group|gid] [switches]\n"
546 "\t-V etcdir alternate /etc location\n"
547 "\t-R rootir alternate root directory\n"
548 "\t-n name group name\n"
549 "\t-g gid group id\n"
550 "\t-F force print\n"
551 "\t-P prettier format\n"
552 "\t-a print all accounting groups\n",
553 "usage: pw groupnext [switches]\n"
554 "\t-V etcdir alternate /etc location\n"
555 "\t-R rootir alternate root directory\n"
556 "\t-C config configuration file\n"
557 "\t-q quiet operation\n"
558 }
559 };
560
561 fprintf(stderr, "%s", help[which][mode]);
562 }
563 exit(EXIT_FAILURE);
564 }
565
566 struct carg *
567 getarg(struct cargs * _args, int ch)
568 {
569 struct carg *c = LIST_FIRST(_args);
570
571 while (c != NULL && c->ch != ch)
572 c = LIST_NEXT(c, list);
573 return c;
574 }
575
576 struct carg *
577 addarg(struct cargs * _args, int ch, char *argstr)
578 {
579 struct carg *ca = malloc(sizeof(struct carg));
580
581 if (ca == NULL)
582 errx(EX_OSERR, "out of memory");
583 ca->ch = ch;
584 ca->val = argstr;
585 LIST_INSERT_HEAD(_args, ca, list);
586 return ca;
587 }
A port of FreeBSDs pw for Darwin