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Make the long-awaited change from $Id$ to $FreeBSD$
[pw-darwin.git] / pw / pw_user.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 * $FreeBSD$
27 */
28
29 #include <unistd.h>
30 #include <fcntl.h>
31 #include <ctype.h>
32 #include <paths.h>
33 #include <sys/param.h>
34 #include <dirent.h>
35 #include <termios.h>
36 #include <sys/types.h>
37 #include <sys/time.h>
38 #include <sys/resource.h>
39 #include <md5.h>
40 #include "pw.h"
41 #include "bitmap.h"
42 #include "pwupd.h"
43
44 static int print_user(struct passwd * pwd, int pretty);
45 static uid_t pw_uidpolicy(struct userconf * cnf, struct cargs * args);
46 static uid_t pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer);
47 static time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args);
48 static time_t pw_exppolicy(struct userconf * cnf, struct cargs * args);
49 static char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user);
50 static char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell);
51 static char *pw_password(struct userconf * cnf, struct cargs * args, char const * user);
52 static char *shell_path(char const * path, char *shells[], char *sh);
53 static void rmat(uid_t uid);
54 static void rmskey(char const * name);
55
56 /*-
57 * -C config configuration file
58 * -q quiet operation
59 * -n name login name
60 * -u uid user id
61 * -c comment user name/comment
62 * -d directory home directory
63 * -e date account expiry date
64 * -p date password expiry date
65 * -g grp primary group
66 * -G grp1,grp2 additional groups
67 * -m [ -k dir ] create and set up home
68 * -s shell name of login shell
69 * -o duplicate uid ok
70 * -L class user class
71 * -l name new login name
72 * -h fd password filehandle
73 * -F force print or add
74 * Setting defaults:
75 * -D set user defaults
76 * -b dir default home root dir
77 * -e period default expiry period
78 * -p period default password change period
79 * -g group default group
80 * -G grp1,grp2.. default additional groups
81 * -L class default login class
82 * -k dir default home skeleton
83 * -s shell default shell
84 * -w method default password method
85 */
86
87 int
88 pw_user(struct userconf * cnf, int mode, struct cargs * args)
89 {
90 int r, r1;
91 char *p = NULL;
92 struct carg *a_name;
93 struct carg *a_uid;
94 struct carg *arg;
95 struct passwd *pwd = NULL;
96 struct group *grp;
97 struct stat st;
98 char line[_PASSWORD_LEN+1];
99
100 static struct passwd fakeuser =
101 {
102 NULL,
103 "*",
104 -1,
105 -1,
106 0,
107 "",
108 "User &",
109 "/bin/sh",
110 0,
111 0
112 };
113
114 /*
115 * With M_NEXT, we only need to return the
116 * next uid to stdout
117 */
118 if (mode == M_NEXT)
119 {
120 uid_t next = pw_uidpolicy(cnf, args);
121 if (getarg(args, 'q'))
122 return next;
123 printf("%ld:", (long)next);
124 pw_group(cnf, mode, args);
125 return EXIT_SUCCESS;
126 }
127
128 /*
129 * We can do all of the common legwork here
130 */
131
132 if ((arg = getarg(args, 'b')) != NULL) {
133 cnf->home = arg->val;
134 }
135
136 /*
137 * If we'll need to use it or we're updating it,
138 * then create the base home directory if necessary
139 */
140 if (arg != NULL || getarg(args, 'm') != NULL) {
141 int l = strlen(cnf->home);
142
143 if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */
144 cnf->home[--l] = '\0';
145
146 if (l < 2 || *cnf->home != '/') /* Check for absolute path name */
147 cmderr(EX_DATAERR, "invalid base directory for home '%s'\n", cnf->home);
148
149 if (stat(cnf->home, &st) == -1) {
150 char dbuf[MAXPATHLEN];
151
152 /*
153 * This is a kludge especially for Joerg :)
154 * If the home directory would be created in the root partition, then
155 * we really create it under /usr which is likely to have more space.
156 * But we create a symlink from cnf->home -> "/usr" -> cnf->home
157 */
158 if (strchr(cnf->home+1, '/') == NULL) {
159 strcpy(dbuf, "/usr");
160 strncat(dbuf, cnf->home, MAXPATHLEN-5);
161 if (mkdir(dbuf, 0755) != -1 || errno == EEXIST) {
162 chown(dbuf, 0, 0);
163 symlink(dbuf, cnf->home);
164 }
165 /* If this falls, fall back to old method */
166 }
167 p = strncpy(dbuf, cnf->home, sizeof dbuf);
168 dbuf[MAXPATHLEN-1] = '\0';
169 if (stat(dbuf, &st) == -1) {
170 while ((p = strchr(++p, '/')) != NULL) {
171 *p = '\0';
172 if (stat(dbuf, &st) == -1) {
173 if (mkdir(dbuf, 0755) == -1)
174 goto direrr;
175 chown(dbuf, 0, 0);
176 } else if (!S_ISDIR(st.st_mode))
177 cmderr(EX_OSFILE, "'%s' (root home parent) is not a directory\n", dbuf);
178 *p = '/';
179 }
180 }
181 if (stat(dbuf, &st) == -1) {
182 if (mkdir(dbuf, 0755) == -1) {
183 direrr: cmderr(EX_OSFILE, "mkdir '%s': %s\n", dbuf, strerror(errno));
184 }
185 chown(dbuf, 0, 0);
186 }
187 } else if (!S_ISDIR(st.st_mode))
188 cmderr(EX_OSFILE, "root home `%s' is not a directory\n", cnf->home);
189 }
190
191
192 if ((arg = getarg(args, 'e')) != NULL)
193 cnf->expire_days = atoi(arg->val);
194
195 if ((arg = getarg(args, 'y')) != NULL)
196 cnf->nispasswd = arg->val;
197
198 if ((arg = getarg(args, 'p')) != NULL && arg->val)
199 cnf->password_days = atoi(arg->val);
200
201 if ((arg = getarg(args, 'g')) != NULL) {
202 p = arg->val;
203 if ((grp = getgrnam(p)) == NULL) {
204 if (!isdigit(*p) || (grp = getgrgid((gid_t) atoi(p))) == NULL)
205 cmderr(EX_NOUSER, "group `%s' does not exist\n", p);
206 }
207 cnf->default_group = newstr(grp->gr_name);
208 }
209 if ((arg = getarg(args, 'L')) != NULL)
210 cnf->default_class = pw_checkname((u_char *)arg->val, 0);
211
212 if ((arg = getarg(args, 'G')) != NULL && arg->val) {
213 int i = 0;
214
215 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
216 if ((grp = getgrnam(p)) == NULL) {
217 if (!isdigit(*p) || (grp = getgrgid((gid_t) atoi(p))) == NULL)
218 cmderr(EX_NOUSER, "group `%s' does not exist\n", p);
219 }
220 if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1)
221 cnf->groups[i++] = newstr(grp->gr_name);
222 }
223 while (i < cnf->numgroups)
224 cnf->groups[i++] = NULL;
225 }
226 if ((arg = getarg(args, 'k')) != NULL) {
227 if (stat(cnf->dotdir = arg->val, &st) == -1 || S_ISDIR(st.st_mode))
228 cmderr(EX_OSFILE, "skeleton `%s' is not a directory or does not exist\n", cnf->dotdir);
229 }
230 if ((arg = getarg(args, 's')) != NULL)
231 cnf->shell_default = arg->val;
232
233 if (mode == M_ADD && getarg(args, 'D')) {
234 if (getarg(args, 'n') != NULL)
235 cmderr(EX_DATAERR, "can't combine `-D' with `-n name'\n");
236 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
237 if ((cnf->min_uid = (uid_t) atoi(p)) == 0)
238 cnf->min_uid = 1000;
239 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid)
240 cnf->max_uid = 32000;
241 }
242 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
243 if ((cnf->min_gid = (gid_t) atoi(p)) == 0)
244 cnf->min_gid = 1000;
245 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid)
246 cnf->max_gid = 32000;
247 }
248 if ((arg = getarg(args, 'w')) != NULL)
249 cnf->default_password = boolean_val(arg->val, cnf->default_password);
250
251 arg = getarg(args, 'C');
252 if (write_userconfig(arg ? arg->val : NULL))
253 return EXIT_SUCCESS;
254 perror("config update");
255 return EX_IOERR;
256 }
257 if (mode == M_PRINT && getarg(args, 'a')) {
258 int pretty = getarg(args, 'P') != NULL;
259
260 setpwent();
261 while ((pwd = getpwent()) != NULL)
262 print_user(pwd, pretty);
263 endpwent();
264 return EXIT_SUCCESS;
265 }
266 if ((a_name = getarg(args, 'n')) != NULL)
267 pwd = getpwnam(pw_checkname((u_char *)a_name->val, 0));
268 a_uid = getarg(args, 'u');
269
270 if (a_uid == NULL) {
271 if (a_name == NULL)
272 cmderr(EX_DATAERR, "user name or id required\n");
273
274 /*
275 * Determine whether 'n' switch is name or uid - we don't
276 * really don't really care which we have, but we need to
277 * know.
278 */
279 if (mode != M_ADD && pwd == NULL && isdigit(*a_name->val) && atoi(a_name->val) > 0) { /* Assume uid */
280 (a_uid = a_name)->ch = 'u';
281 a_name = NULL;
282 }
283 }
284 /*
285 * Update, delete & print require that the user exists
286 */
287 if (mode == M_UPDATE || mode == M_DELETE || mode == M_PRINT) {
288 if (a_name == NULL && pwd == NULL) /* Try harder */
289 pwd = getpwuid(atoi(a_uid->val));
290
291 if (pwd == NULL) {
292 if (mode == M_PRINT && getarg(args, 'F')) {
293 fakeuser.pw_name = a_name ? a_name->val : "nouser";
294 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1;
295 return print_user(&fakeuser, getarg(args, 'P') != NULL);
296 }
297 if (a_name == NULL)
298 cmderr(EX_NOUSER, "no such uid `%s'\n", a_uid->val);
299 cmderr(EX_NOUSER, "no such user `%s'\n", a_name->val);
300 }
301 if (a_name == NULL) /* May be needed later */
302 a_name = addarg(args, 'n', newstr(pwd->pw_name));
303
304 /*
305 * Handle deletions now
306 */
307 if (mode == M_DELETE) {
308 char file[MAXPATHLEN];
309 char home[MAXPATHLEN];
310 uid_t uid = pwd->pw_uid;
311
312 if (strcmp(pwd->pw_name, "root") == 0)
313 cmderr(EX_DATAERR, "cannot remove user 'root'\n");
314
315 /*
316 * Remove skey record from /etc/skeykeys
317 */
318
319 rmskey(pwd->pw_name);
320
321 /*
322 * Remove crontabs
323 */
324 sprintf(file, "/var/cron/tabs/%s", pwd->pw_name);
325 if (access(file, F_OK) == 0) {
326 sprintf(file, "crontab -u %s -r", pwd->pw_name);
327 system(file);
328 }
329 /*
330 * Save these for later, since contents of pwd may be
331 * invalidated by deletion
332 */
333 sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
334 strncpy(home, pwd->pw_dir, sizeof home);
335 home[sizeof home - 1] = '\0';
336
337 if (!delpwent(pwd))
338 cmderr(EX_IOERR, "Error updating passwd file: %s\n", strerror(errno));
339
340 if (cnf->nispasswd && *cnf->nispasswd=='/' && !delnispwent(cnf->nispasswd, a_name->val))
341 perror("WARNING: NIS passwd update");
342
343 editgroups(a_name->val, NULL);
344
345 pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid);
346
347 /*
348 * Remove mail file
349 */
350 remove(file);
351
352 /*
353 * Remove at jobs
354 */
355 if (getpwuid(uid) == NULL)
356 rmat(uid);
357
358 /*
359 * Remove home directory and contents
360 */
361 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) {
362 if (stat(home, &st) != -1) {
363 rm_r(home, uid);
364 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved",
365 a_name->val, (long) uid, home,
366 stat(home, &st) == -1 ? "" : "not completely ");
367 }
368 }
369 return EXIT_SUCCESS;
370 } else if (mode == M_PRINT)
371 return print_user(pwd, getarg(args, 'P') != NULL);
372
373 /*
374 * The rest is edit code
375 */
376 if ((arg = getarg(args, 'l')) != NULL) {
377 if (strcmp(pwd->pw_name, "root") == 0)
378 cmderr(EX_DATAERR, "can't rename `root' account\n");
379 pwd->pw_name = pw_checkname((u_char *)arg->val, 0);
380 }
381 if ((arg = getarg(args, 'u')) != NULL && isdigit(*arg->val)) {
382 pwd->pw_uid = (uid_t) atol(arg->val);
383 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
384 cmderr(EX_DATAERR, "can't change uid of `root' account\n");
385 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
386 fprintf(stderr, "WARNING: account `%s' will have a uid of 0 (superuser access!)\n", pwd->pw_name);
387 }
388 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) /* Already checked this */
389 pwd->pw_gid = (gid_t) getgrnam(cnf->default_group)->gr_gid;
390
391 if ((arg = getarg(args, 'p')) != NULL) {
392 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0)
393 pwd->pw_change = 0;
394 else {
395 time_t now = time(NULL);
396 time_t expire = parse_date(now, arg->val);
397
398 if (now == expire)
399 cmderr(EX_DATAERR, "Invalid password change date `%s'\n", arg->val);
400 pwd->pw_change = expire;
401 }
402 }
403 if ((arg = getarg(args, 'e')) != NULL) {
404 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0)
405 pwd->pw_expire = 0;
406 else {
407 time_t now = time(NULL);
408 time_t expire = parse_date(now, arg->val);
409
410 if (now == expire)
411 cmderr(EX_DATAERR, "Invalid account expiry date `%s'\n", arg->val);
412 pwd->pw_expire = expire;
413 }
414 }
415 if ((arg = getarg(args, 's')) != NULL)
416 pwd->pw_shell = shell_path(cnf->shelldir, cnf->shells, arg->val);
417
418 if (getarg(args, 'L'))
419 pwd->pw_class = cnf->default_class;
420
421 if ((arg = getarg(args, 'd')) != NULL) {
422 if (stat(pwd->pw_dir = arg->val, &st) == -1) {
423 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0)
424 fprintf(stderr, "WARNING: home `%s' does not exist\n", pwd->pw_dir);
425 } else if (!S_ISDIR(st.st_mode))
426 fprintf(stderr, "WARNING: home `%s' is not a directory\n", pwd->pw_dir);
427 }
428
429 if ((arg = getarg(args, 'w')) != NULL && getarg(args, 'h') == NULL)
430 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
431
432 } else {
433 if (a_name == NULL) /* Required */
434 cmderr(EX_DATAERR, "login name required\n");
435 else if ((pwd = getpwnam(a_name->val)) != NULL) /* Exists */
436 cmderr(EX_DATAERR, "login name `%s' already exists\n", a_name->val);
437
438 /*
439 * Now, set up defaults for a new user
440 */
441 pwd = &fakeuser;
442 pwd->pw_name = a_name->val;
443 pwd->pw_class = cnf->default_class ? cnf->default_class : "";
444 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
445 pwd->pw_uid = pw_uidpolicy(cnf, args);
446 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid);
447 pwd->pw_change = pw_pwdpolicy(cnf, args);
448 pwd->pw_expire = pw_exppolicy(cnf, args);
449 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name);
450 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL);
451
452 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
453 fprintf(stderr, "WARNING: new account `%s' has a uid of 0 (superuser access!)\n", pwd->pw_name);
454 }
455
456 /*
457 * Shared add/edit code
458 */
459 if ((arg = getarg(args, 'c')) != NULL)
460 pwd->pw_gecos = pw_checkname((u_char *)arg->val, 1);
461
462 if ((arg = getarg(args, 'h')) != NULL) {
463 if (strcmp(arg->val, "-") == 0)
464 pwd->pw_passwd = "*"; /* No access */
465 else {
466 int fd = atoi(arg->val);
467 int b;
468 int istty = isatty(fd);
469 struct termios t;
470
471 if (istty) {
472 if (tcgetattr(fd, &t) == -1)
473 istty = 0;
474 else {
475 struct termios n = t;
476
477 /* Disable echo */
478 n.c_lflag &= ~(ECHO);
479 tcsetattr(fd, TCSANOW, &n);
480 printf("%sassword for user %s:", (mode == M_UPDATE) ? "New p" : "P", pwd->pw_name);
481 fflush(stdout);
482 }
483 }
484 b = read(fd, line, sizeof(line) - 1);
485 if (istty) { /* Restore state */
486 tcsetattr(fd, TCSANOW, &t);
487 fputc('\n', stdout);
488 fflush(stdout);
489 }
490 if (b < 0) {
491 perror("-h file descriptor");
492 return EX_IOERR;
493 }
494 line[b] = '\0';
495 if ((p = strpbrk(line, " \t\r\n")) != NULL)
496 *p = '\0';
497 if (!*line)
498 cmderr(EX_DATAERR, "empty password read on file descriptor %d\n", fd);
499 pwd->pw_passwd = pw_pwcrypt(line);
500 }
501 }
502
503 /*
504 * Special case: -N only displays & exits
505 */
506 if (getarg(args, 'N') != NULL)
507 return print_user(pwd, getarg(args, 'P') != NULL);
508
509 r = r1 = 1;
510 if (mode == M_ADD) {
511 r = addpwent(pwd);
512 if (r && cnf->nispasswd && *cnf->nispasswd=='/')
513 r1 = addnispwent(cnf->nispasswd, pwd);
514 } else if (mode == M_UPDATE) {
515 r = chgpwent(a_name->val, pwd);
516 if (r && cnf->nispasswd && *cnf->nispasswd=='/')
517 r1 = chgnispwent(cnf->nispasswd, a_name->val, pwd);
518 }
519
520 if (!r) {
521 perror("password update");
522 return EX_IOERR;
523 } else if (!r1) {
524 perror("WARNING: NIS password update");
525 /* Keep on trucking */
526 }
527
528 /*
529 * Ok, user is created or changed - now edit group file
530 */
531
532 if (mode == M_ADD || getarg(args, 'G') != NULL)
533 editgroups(pwd->pw_name, cnf->groups);
534
535 /* pwd may have been invalidated */
536 if ((pwd = getpwnam(a_name->val)) == NULL)
537 cmderr(EX_NOUSER, "user '%s' disappeared during update\n", a_name->val);
538
539 grp = getgrgid(pwd->pw_gid);
540 pw_log(cnf, mode, W_USER, "%s(%ld):%s(%d):%s:%s:%s",
541 pwd->pw_name, (long) pwd->pw_uid,
542 grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1),
543 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
544
545 /*
546 * If adding, let's touch and chown the user's mail file. This is not
547 * strictly necessary under BSD with a 0755 maildir but it also
548 * doesn't hurt anything to create the empty mailfile
549 */
550 if (mode == M_ADD) {
551 FILE *fp;
552
553 sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
554 close(open(line, O_RDWR | O_CREAT, 0600)); /* Preserve contents &
555 * mtime */
556 chown(line, pwd->pw_uid, pwd->pw_gid);
557
558 /*
559 * Send mail to the new user as well, if we are asked to
560 */
561 if (cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) {
562 FILE *pfp = popen(_PATH_SENDMAIL " -t", "w");
563
564 if (pfp == NULL)
565 perror("sendmail");
566 else {
567 fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name);
568 while (fgets(line, sizeof(line), fp) != NULL) {
569 /* Do substitutions? */
570 fputs(line, pfp);
571 }
572 pclose(pfp);
573 pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent",
574 pwd->pw_name, (long) pwd->pw_uid);
575 }
576 fclose(fp);
577 }
578 }
579 /*
580 * Finally, let's create and populate the user's home directory. Note
581 * that this also `works' for editing users if -m is used, but
582 * existing files will *not* be overwritten.
583 */
584 if (getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
585 copymkdir(pwd->pw_dir, cnf->dotdir, 0755, pwd->pw_uid, pwd->pw_gid);
586 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made",
587 pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir);
588 }
589 return EXIT_SUCCESS;
590 }
591
592
593 static uid_t
594 pw_uidpolicy(struct userconf * cnf, struct cargs * args)
595 {
596 struct passwd *pwd;
597 uid_t uid = (uid_t) - 1;
598 struct carg *a_uid = getarg(args, 'u');
599
600 /*
601 * Check the given uid, if any
602 */
603 if (a_uid != NULL) {
604 uid = (uid_t) atol(a_uid->val);
605
606 if ((pwd = getpwuid(uid)) != NULL && getarg(args, 'o') == NULL)
607 cmderr(EX_DATAERR, "uid `%ld' has already been allocated\n", (long) pwd->pw_uid);
608 } else {
609 struct bitmap bm;
610
611 /*
612 * We need to allocate the next available uid under one of
613 * two policies a) Grab the first unused uid b) Grab the
614 * highest possible unused uid
615 */
616 if (cnf->min_uid >= cnf->max_uid) { /* Sanity
617 * claus^H^H^H^Hheck */
618 cnf->min_uid = 1000;
619 cnf->max_uid = 32000;
620 }
621 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
622
623 /*
624 * Now, let's fill the bitmap from the password file
625 */
626 setpwent();
627 while ((pwd = getpwent()) != NULL)
628 if (pwd->pw_uid >= (int) cnf->min_uid && pwd->pw_uid <= (int) cnf->max_uid)
629 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
630 endpwent();
631
632 /*
633 * Then apply the policy, with fallback to reuse if necessary
634 */
635 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
636 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
637
638 /*
639 * Another sanity check
640 */
641 if (uid < cnf->min_uid || uid > cnf->max_uid)
642 cmderr(EX_SOFTWARE, "unable to allocate a new uid - range fully used\n");
643 bm_dealloc(&bm);
644 }
645 return uid;
646 }
647
648
649 static uid_t
650 pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer)
651 {
652 struct group *grp;
653 gid_t gid = (uid_t) - 1;
654 struct carg *a_gid = getarg(args, 'g');
655
656 /*
657 * If no arg given, see if default can help out
658 */
659 if (a_gid == NULL && cnf->default_group && *cnf->default_group)
660 a_gid = addarg(args, 'g', cnf->default_group);
661
662 /*
663 * Check the given gid, if any
664 */
665 setgrent();
666 if (a_gid != NULL) {
667 if ((grp = getgrnam(a_gid->val)) == NULL) {
668 gid = (gid_t) atol(a_gid->val);
669 if ((gid == 0 && !isdigit(*a_gid->val)) || (grp = getgrgid(gid)) == NULL)
670 cmderr(EX_NOUSER, "group `%s' is not defined\n", a_gid->val);
671 }
672 gid = grp->gr_gid;
673 } else if ((grp = getgrnam(nam)) != NULL && grp->gr_mem[0] == NULL) {
674 gid = grp->gr_gid; /* Already created? Use it anyway... */
675 } else {
676 struct cargs grpargs;
677 char tmp[32];
678
679 LIST_INIT(&grpargs);
680 addarg(&grpargs, 'n', nam);
681
682 /*
683 * We need to auto-create a group with the user's name. We
684 * can send all the appropriate output to our sister routine
685 * bit first see if we can create a group with gid==uid so we
686 * can keep the user and group ids in sync. We purposely do
687 * NOT check the gid range if we can force the sync. If the
688 * user's name dups an existing group, then the group add
689 * function will happily handle that case for us and exit.
690 */
691 if (getgrgid(prefer) == NULL) {
692 sprintf(tmp, "%lu", (unsigned long) prefer);
693 addarg(&grpargs, 'g', tmp);
694 }
695 if (getarg(args, 'N'))
696 {
697 addarg(&grpargs, 'N', NULL);
698 addarg(&grpargs, 'q', NULL);
699 gid = pw_group(cnf, M_NEXT, &grpargs);
700 }
701 else
702 {
703 pw_group(cnf, M_ADD, &grpargs);
704 if ((grp = getgrnam(nam)) != NULL)
705 gid = grp->gr_gid;
706 }
707 a_gid = grpargs.lh_first;
708 while (a_gid != NULL) {
709 struct carg *t = a_gid->list.le_next;
710 LIST_REMOVE(a_gid, list);
711 a_gid = t;
712 }
713 }
714 endgrent();
715 return gid;
716 }
717
718
719 static time_t
720 pw_pwdpolicy(struct userconf * cnf, struct cargs * args)
721 {
722 time_t result = 0;
723 time_t now = time(NULL);
724 struct carg *arg = getarg(args, 'e');
725
726 if (arg != NULL) {
727 if ((result = parse_date(now, arg->val)) == now)
728 cmderr(EX_DATAERR, "invalid date/time `%s'\n", arg->val);
729 } else if (cnf->password_days > 0)
730 result = now + ((long) cnf->password_days * 86400L);
731 return result;
732 }
733
734
735 static time_t
736 pw_exppolicy(struct userconf * cnf, struct cargs * args)
737 {
738 time_t result = 0;
739 time_t now = time(NULL);
740 struct carg *arg = getarg(args, 'e');
741
742 if (arg != NULL) {
743 if ((result = parse_date(now, arg->val)) == now)
744 cmderr(EX_DATAERR, "invalid date/time `%s'\n", arg->val);
745 } else if (cnf->expire_days > 0)
746 result = now + ((long) cnf->expire_days * 86400L);
747 return result;
748 }
749
750
751 static char *
752 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user)
753 {
754 struct carg *arg = getarg(args, 'd');
755
756 if (arg)
757 return arg->val;
758 else {
759 static char home[128];
760
761 if (cnf->home == NULL || *cnf->home == '\0')
762 cmderr(EX_CONFIG, "no base home directory set\n");
763 sprintf(home, "%s/%s", cnf->home, user);
764 return home;
765 }
766 }
767
768 static char *
769 shell_path(char const * path, char *shells[], char *sh)
770 {
771 if (sh != NULL && (*sh == '/' || *sh == '\0'))
772 return sh; /* specified full path or forced none */
773 else {
774 char *p;
775 char paths[_UC_MAXLINE];
776
777 /*
778 * We need to search paths
779 */
780 strncpy(paths, path, sizeof paths);
781 paths[sizeof paths - 1] = '\0';
782 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
783 int i;
784 static char shellpath[256];
785
786 if (sh != NULL) {
787 sprintf(shellpath, "%s/%s", p, sh);
788 if (access(shellpath, X_OK) == 0)
789 return shellpath;
790 } else
791 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
792 sprintf(shellpath, "%s/%s", p, shells[i]);
793 if (access(shellpath, X_OK) == 0)
794 return shellpath;
795 }
796 }
797 if (sh == NULL)
798 cmderr(EX_OSFILE, "can't find shell `%s' in shell paths\n", sh);
799 cmderr(EX_CONFIG, "no default shell available or defined\n");
800 return NULL;
801 }
802 }
803
804
805 static char *
806 pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell)
807 {
808 char *sh = newshell;
809 struct carg *arg = getarg(args, 's');
810
811 if (newshell == NULL && arg != NULL)
812 sh = arg->val;
813 return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default);
814 }
815
816 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.";
817
818 char *
819 pw_pwcrypt(char *password)
820 {
821 int i;
822 char salt[12];
823
824 static char buf[256];
825
826 /*
827 * Calculate a salt value
828 */
829 srandom((unsigned) (time(NULL) ^ getpid()));
830 for (i = 0; i < 8; i++)
831 salt[i] = chars[random() % 63];
832 salt[i] = '\0';
833
834 return strcpy(buf, crypt(password, salt));
835 }
836
837 #if defined(__FreeBSD__)
838
839 #if defined(USE_MD5RAND)
840 u_char *
841 pw_getrand(u_char *buf, int len) /* cryptographically secure rng */
842 {
843 int i;
844 for (i=0;i<len;i+=16) {
845 u_char ubuf[16];
846
847 MD5_CTX md5_ctx;
848 struct timeval tv, tvo;
849 struct rusage ru;
850 int n=0;
851 int t;
852
853 MD5Init (&md5_ctx);
854 t=getpid();
855 MD5Update (&md5_ctx, (u_char*)&t, sizeof t);
856 t=getppid();
857 MD5Update (&md5_ctx, (u_char*)&t, sizeof t);
858 gettimeofday (&tvo, NULL);
859 do {
860 getrusage (RUSAGE_SELF, &ru);
861 MD5Update (&md5_ctx, (u_char*)&ru, sizeof ru);
862 gettimeofday (&tv, NULL);
863 MD5Update (&md5_ctx, (u_char*)&tv, sizeof tv);
864 } while (n++<20 || tv.tv_usec-tvo.tv_usec<100*1000);
865 MD5Final (ubuf, &md5_ctx);
866 memcpy(buf+i, ubuf, MIN(16, len-n));
867 }
868 return buf;
869 }
870
871 #else /* Use random device (preferred) */
872
873 static u_char *
874 pw_getrand(u_char *buf, int len)
875 {
876 int fd;
877 fd = open("/dev/urandom", O_RDONLY);
878 if (fd==-1)
879 cmderr(EX_OSFILE, "can't open /dev/urandom: %s\n", strerror(errno));
880 else if (read(fd, buf, len)!=len)
881 cmderr(EX_IOERR, "read error on /dev/urandom\n");
882 close(fd);
883 return buf;
884 }
885
886 #endif
887
888 #else /* Portable version */
889
890 static u_char *
891 pw_getrand(u_char *buf, int len)
892 {
893 int i;
894
895 for (i = 0; i < len; i++) {
896 unsigned val = random();
897 /* Use all bits in the random value */
898 buf[i]=(u_char)((val >> 24) ^ (val >> 16) ^ (val >> 8) ^ val);
899 }
900 return buf;
901 }
902
903 #endif
904
905 static char *
906 pw_password(struct userconf * cnf, struct cargs * args, char const * user)
907 {
908 int i, l;
909 char pwbuf[32];
910 u_char rndbuf[sizeof pwbuf];
911
912 switch (cnf->default_password) {
913 case -1: /* Random password */
914 srandom((unsigned) (time(NULL) ^ getpid()));
915 l = (random() % 8 + 8); /* 8 - 16 chars */
916 pw_getrand(rndbuf, l);
917 for (i = 0; i < l; i++)
918 pwbuf[i] = chars[rndbuf[i] % sizeof(chars)];
919 pwbuf[i] = '\0';
920
921 /*
922 * We give this information back to the user
923 */
924 if (getarg(args, 'h') == NULL && getarg(args, 'N') == NULL) {
925 if (isatty(1))
926 printf("Password for '%s' is: ", user);
927 printf("%s\n", pwbuf);
928 fflush(stdout);
929 }
930 break;
931
932 case -2: /* No password at all! */
933 return "";
934
935 case 0: /* No login - default */
936 default:
937 return "*";
938
939 case 1: /* user's name */
940 strncpy(pwbuf, user, sizeof pwbuf);
941 pwbuf[sizeof pwbuf - 1] = '\0';
942 break;
943 }
944 return pw_pwcrypt(pwbuf);
945 }
946
947
948 static int
949 print_user(struct passwd * pwd, int pretty)
950 {
951 if (!pretty) {
952 char buf[_UC_MAXLINE];
953
954 fmtpwent(buf, pwd);
955 fputs(buf, stdout);
956 } else {
957 int j;
958 char *p;
959 struct group *grp = getgrgid(pwd->pw_gid);
960 char uname[60] = "User &", office[60] = "[None]",
961 wphone[60] = "[None]", hphone[60] = "[None]";
962 char acexpire[32] = "[None]", pwexpire[32] = "[None]";
963 struct tm * tptr;
964
965 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
966 strncpy(uname, p, sizeof uname);
967 uname[sizeof uname - 1] = '\0';
968 if ((p = strtok(NULL, ",")) != NULL) {
969 strncpy(office, p, sizeof office);
970 office[sizeof office - 1] = '\0';
971 if ((p = strtok(NULL, ",")) != NULL) {
972 strncpy(wphone, p, sizeof wphone);
973 wphone[sizeof wphone - 1] = '\0';
974 if ((p = strtok(NULL, "")) != NULL) {
975 strncpy(hphone, p, sizeof hphone);
976 hphone[sizeof hphone - 1] = '\0';
977 }
978 }
979 }
980 }
981 /*
982 * Handle '&' in gecos field
983 */
984 if ((p = strchr(uname, '&')) != NULL) {
985 int l = strlen(pwd->pw_name);
986 int m = strlen(p);
987
988 memmove(p + l, p + 1, m);
989 memmove(p, pwd->pw_name, l);
990 *p = (char) toupper(*p);
991 }
992 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
993 strftime(acexpire, sizeof acexpire, "%c", tptr);
994 if (pwd->pw_change > (time_t)9 && (tptr = localtime(&pwd->pw_change)) != NULL)
995 strftime(pwexpire, sizeof pwexpire, "%c", tptr);
996 printf("Login Name: %-10s #%-16ld Group: %-10s #%ld\n"
997 " Full Name: %s\n"
998 " Home: %-26.26s Class: %s\n"
999 " Shell: %-26.26s Office: %s\n"
1000 "Work Phone: %-26.26s Home Phone: %s\n"
1001 "Acc Expire: %-26.26s Pwd Expire: %s\n",
1002 pwd->pw_name, (long) pwd->pw_uid,
1003 grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid,
1004 uname, pwd->pw_dir, pwd->pw_class,
1005 pwd->pw_shell, office, wphone, hphone,
1006 acexpire, pwexpire);
1007 setgrent();
1008 j = 0;
1009 while ((grp=getgrent()) != NULL)
1010 {
1011 int i = 0;
1012 while (grp->gr_mem[i] != NULL)
1013 {
1014 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0)
1015 {
1016 printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name);
1017 break;
1018 }
1019 ++i;
1020 }
1021 }
1022 endgrent();
1023 printf("%s\n", j ? "\n" : "");
1024 }
1025 return EXIT_SUCCESS;
1026 }
1027
1028 char *
1029 pw_checkname(u_char *name, int gecos)
1030 {
1031 int l = 0;
1032 char const *notch = gecos ? ":!@" : " ,\t:+&#%$^()!@~*?<>=|\\/\"";
1033
1034 while (name[l]) {
1035 if (strchr(notch, name[l]) != NULL || name[l] < ' ' || name[l] == 127 ||
1036 (!gecos && l==0 && name[l] == '-') || /* leading '-' */
1037 (!gecos && name[l] & 0x80)) /* 8-bit */
1038 cmderr(EX_DATAERR, (name[l] >= ' ' && name[l] < 127)
1039 ? "invalid character `%c' in field\n"
1040 : "invalid character 0x%02x in field\n",
1041 name[l]);
1042 ++l;
1043 }
1044 if (!gecos && l > MAXLOGNAME)
1045 cmderr(EX_DATAERR, "name too long `%s'\n", name);
1046 return (char *)name;
1047 }
1048
1049
1050 static void
1051 rmat(uid_t uid)
1052 {
1053 DIR *d = opendir("/var/at/jobs");
1054
1055 if (d != NULL) {
1056 struct dirent *e;
1057
1058 while ((e = readdir(d)) != NULL) {
1059 struct stat st;
1060
1061 if (strncmp(e->d_name, ".lock", 5) != 0 &&
1062 stat(e->d_name, &st) == 0 &&
1063 !S_ISDIR(st.st_mode) &&
1064 st.st_uid == uid) {
1065 char tmp[MAXPATHLEN];
1066
1067 sprintf(tmp, "/usr/bin/atrm %s", e->d_name);
1068 system(tmp);
1069 }
1070 }
1071 closedir(d);
1072 }
1073 }
1074
1075 static void
1076 rmskey(char const * name)
1077 {
1078 static const char etcskey[] = "/etc/skeykeys";
1079 FILE *fp = fopen(etcskey, "r+");
1080
1081 if (fp != NULL) {
1082 char tmp[1024];
1083 off_t atofs = 0;
1084 int length = strlen(name);
1085
1086 while (fgets(tmp, sizeof tmp, fp) != NULL) {
1087 if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') {
1088 if (fseek(fp, atofs, SEEK_SET) == 0) {
1089 fwrite("#", 1, 1, fp); /* Comment username out */
1090 }
1091 break;
1092 }
1093 atofs = ftell(fp);
1094 }
1095 /*
1096 * If we got an error of any sort, don't update!
1097 */
1098 fclose(fp);
1099 }
1100 }
1101
A port of FreeBSDs pw for Darwin