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Fix useage of MAXLOGNAME to include terminating NUL, by using
[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 <utmp.h>
40 #if defined(USE_MD5RAND)
41 #include <md5.h>
42 #endif
43 #include "pw.h"
44 #include "bitmap.h"
45 #include "pwupd.h"
46
47 #if (MAXLOGNAME-1) > UT_NAMESIZE
48 #define LOGNAMESIZE UT_NAMESIZE
49 #else
50 #define LOGNAMESIZE (MAXLOGNAME-1)
51 #endif
52
53 static int print_user(struct passwd * pwd, int pretty);
54 static uid_t pw_uidpolicy(struct userconf * cnf, struct cargs * args);
55 static uid_t pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer);
56 static time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args);
57 static time_t pw_exppolicy(struct userconf * cnf, struct cargs * args);
58 static char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user);
59 static char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell);
60 static char *pw_password(struct userconf * cnf, struct cargs * args, char const * user);
61 static char *shell_path(char const * path, char *shells[], char *sh);
62 static void rmat(uid_t uid);
63 static void rmskey(char const * name);
64
65 /*-
66 * -C config configuration file
67 * -q quiet operation
68 * -n name login name
69 * -u uid user id
70 * -c comment user name/comment
71 * -d directory home directory
72 * -e date account expiry date
73 * -p date password expiry date
74 * -g grp primary group
75 * -G grp1,grp2 additional groups
76 * -m [ -k dir ] create and set up home
77 * -s shell name of login shell
78 * -o duplicate uid ok
79 * -L class user class
80 * -l name new login name
81 * -h fd password filehandle
82 * -F force print or add
83 * Setting defaults:
84 * -D set user defaults
85 * -b dir default home root dir
86 * -e period default expiry period
87 * -p period default password change period
88 * -g group default group
89 * -G grp1,grp2.. default additional groups
90 * -L class default login class
91 * -k dir default home skeleton
92 * -s shell default shell
93 * -w method default password method
94 */
95
96 int
97 pw_user(struct userconf * cnf, int mode, struct cargs * args)
98 {
99 int r, r1;
100 char *p = NULL;
101 struct carg *a_name;
102 struct carg *a_uid;
103 struct carg *arg;
104 struct passwd *pwd = NULL;
105 struct group *grp;
106 struct stat st;
107 char line[_PASSWORD_LEN+1];
108
109 static struct passwd fakeuser =
110 {
111 NULL,
112 "*",
113 -1,
114 -1,
115 0,
116 "",
117 "User &",
118 "/bin/sh",
119 0,
120 0
121 };
122
123 /*
124 * With M_NEXT, we only need to return the
125 * next uid to stdout
126 */
127 if (mode == M_NEXT)
128 {
129 uid_t next = pw_uidpolicy(cnf, args);
130 if (getarg(args, 'q'))
131 return next;
132 printf("%ld:", (long)next);
133 pw_group(cnf, mode, args);
134 return EXIT_SUCCESS;
135 }
136
137 /*
138 * We can do all of the common legwork here
139 */
140
141 if ((arg = getarg(args, 'b')) != NULL) {
142 cnf->home = arg->val;
143 }
144
145 /*
146 * If we'll need to use it or we're updating it,
147 * then create the base home directory if necessary
148 */
149 if (arg != NULL || getarg(args, 'm') != NULL) {
150 int l = strlen(cnf->home);
151
152 if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */
153 cnf->home[--l] = '\0';
154
155 if (l < 2 || *cnf->home != '/') /* Check for absolute path name */
156 cmderr(EX_DATAERR, "invalid base directory for home '%s'\n", cnf->home);
157
158 if (stat(cnf->home, &st) == -1) {
159 char dbuf[MAXPATHLEN];
160
161 /*
162 * This is a kludge especially for Joerg :)
163 * If the home directory would be created in the root partition, then
164 * we really create it under /usr which is likely to have more space.
165 * But we create a symlink from cnf->home -> "/usr" -> cnf->home
166 */
167 if (strchr(cnf->home+1, '/') == NULL) {
168 strcpy(dbuf, "/usr");
169 strncat(dbuf, cnf->home, MAXPATHLEN-5);
170 if (mkdir(dbuf, 0755) != -1 || errno == EEXIST) {
171 chown(dbuf, 0, 0);
172 symlink(dbuf, cnf->home);
173 }
174 /* If this falls, fall back to old method */
175 }
176 p = strncpy(dbuf, cnf->home, sizeof dbuf);
177 dbuf[MAXPATHLEN-1] = '\0';
178 if (stat(dbuf, &st) == -1) {
179 while ((p = strchr(++p, '/')) != NULL) {
180 *p = '\0';
181 if (stat(dbuf, &st) == -1) {
182 if (mkdir(dbuf, 0755) == -1)
183 goto direrr;
184 chown(dbuf, 0, 0);
185 } else if (!S_ISDIR(st.st_mode))
186 cmderr(EX_OSFILE, "'%s' (root home parent) is not a directory\n", dbuf);
187 *p = '/';
188 }
189 }
190 if (stat(dbuf, &st) == -1) {
191 if (mkdir(dbuf, 0755) == -1) {
192 direrr: cmderr(EX_OSFILE, "mkdir '%s': %s\n", dbuf, strerror(errno));
193 }
194 chown(dbuf, 0, 0);
195 }
196 } else if (!S_ISDIR(st.st_mode))
197 cmderr(EX_OSFILE, "root home `%s' is not a directory\n", cnf->home);
198 }
199
200
201 if ((arg = getarg(args, 'e')) != NULL)
202 cnf->expire_days = atoi(arg->val);
203
204 if ((arg = getarg(args, 'y')) != NULL)
205 cnf->nispasswd = arg->val;
206
207 if ((arg = getarg(args, 'p')) != NULL && arg->val)
208 cnf->password_days = atoi(arg->val);
209
210 if ((arg = getarg(args, 'g')) != NULL) {
211 p = arg->val;
212 if ((grp = getgrnam(p)) == NULL) {
213 if (!isdigit(*p) || (grp = getgrgid((gid_t) atoi(p))) == NULL)
214 cmderr(EX_NOUSER, "group `%s' does not exist\n", p);
215 }
216 cnf->default_group = newstr(grp->gr_name);
217 }
218 if ((arg = getarg(args, 'L')) != NULL)
219 cnf->default_class = pw_checkname((u_char *)arg->val, 0);
220
221 if ((arg = getarg(args, 'G')) != NULL && arg->val) {
222 int i = 0;
223
224 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
225 if ((grp = getgrnam(p)) == NULL) {
226 if (!isdigit(*p) || (grp = getgrgid((gid_t) atoi(p))) == NULL)
227 cmderr(EX_NOUSER, "group `%s' does not exist\n", p);
228 }
229 if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1)
230 cnf->groups[i++] = newstr(grp->gr_name);
231 }
232 while (i < cnf->numgroups)
233 cnf->groups[i++] = NULL;
234 }
235 if ((arg = getarg(args, 'k')) != NULL) {
236 if (stat(cnf->dotdir = arg->val, &st) == -1 || S_ISDIR(st.st_mode))
237 cmderr(EX_OSFILE, "skeleton `%s' is not a directory or does not exist\n", cnf->dotdir);
238 }
239 if ((arg = getarg(args, 's')) != NULL)
240 cnf->shell_default = arg->val;
241
242 if (mode == M_ADD && getarg(args, 'D')) {
243 if (getarg(args, 'n') != NULL)
244 cmderr(EX_DATAERR, "can't combine `-D' with `-n name'\n");
245 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
246 if ((cnf->min_uid = (uid_t) atoi(p)) == 0)
247 cnf->min_uid = 1000;
248 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid)
249 cnf->max_uid = 32000;
250 }
251 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
252 if ((cnf->min_gid = (gid_t) atoi(p)) == 0)
253 cnf->min_gid = 1000;
254 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid)
255 cnf->max_gid = 32000;
256 }
257 if ((arg = getarg(args, 'w')) != NULL)
258 cnf->default_password = boolean_val(arg->val, cnf->default_password);
259
260 arg = getarg(args, 'C');
261 if (write_userconfig(arg ? arg->val : NULL))
262 return EXIT_SUCCESS;
263 perror("config update");
264 return EX_IOERR;
265 }
266 if (mode == M_PRINT && getarg(args, 'a')) {
267 int pretty = getarg(args, 'P') != NULL;
268
269 setpwent();
270 while ((pwd = getpwent()) != NULL)
271 print_user(pwd, pretty);
272 endpwent();
273 return EXIT_SUCCESS;
274 }
275 if ((a_name = getarg(args, 'n')) != NULL)
276 pwd = getpwnam(pw_checkname((u_char *)a_name->val, 0));
277 a_uid = getarg(args, 'u');
278
279 if (a_uid == NULL) {
280 if (a_name == NULL)
281 cmderr(EX_DATAERR, "user name or id required\n");
282
283 /*
284 * Determine whether 'n' switch is name or uid - we don't
285 * really don't really care which we have, but we need to
286 * know.
287 */
288 if (mode != M_ADD && pwd == NULL && isdigit(*a_name->val) && atoi(a_name->val) > 0) { /* Assume uid */
289 (a_uid = a_name)->ch = 'u';
290 a_name = NULL;
291 }
292 }
293 /*
294 * Update, delete & print require that the user exists
295 */
296 if (mode == M_UPDATE || mode == M_DELETE || mode == M_PRINT) {
297 if (a_name == NULL && pwd == NULL) /* Try harder */
298 pwd = getpwuid(atoi(a_uid->val));
299
300 if (pwd == NULL) {
301 if (mode == M_PRINT && getarg(args, 'F')) {
302 fakeuser.pw_name = a_name ? a_name->val : "nouser";
303 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1;
304 return print_user(&fakeuser, getarg(args, 'P') != NULL);
305 }
306 if (a_name == NULL)
307 cmderr(EX_NOUSER, "no such uid `%s'\n", a_uid->val);
308 cmderr(EX_NOUSER, "no such user `%s'\n", a_name->val);
309 }
310 if (a_name == NULL) /* May be needed later */
311 a_name = addarg(args, 'n', newstr(pwd->pw_name));
312
313 /*
314 * Handle deletions now
315 */
316 if (mode == M_DELETE) {
317 char file[MAXPATHLEN];
318 char home[MAXPATHLEN];
319 uid_t uid = pwd->pw_uid;
320
321 if (strcmp(pwd->pw_name, "root") == 0)
322 cmderr(EX_DATAERR, "cannot remove user 'root'\n");
323
324 /*
325 * Remove skey record from /etc/skeykeys
326 */
327
328 rmskey(pwd->pw_name);
329
330 /*
331 * Remove crontabs
332 */
333 sprintf(file, "/var/cron/tabs/%s", pwd->pw_name);
334 if (access(file, F_OK) == 0) {
335 sprintf(file, "crontab -u %s -r", pwd->pw_name);
336 system(file);
337 }
338 /*
339 * Save these for later, since contents of pwd may be
340 * invalidated by deletion
341 */
342 sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
343 strncpy(home, pwd->pw_dir, sizeof home);
344 home[sizeof home - 1] = '\0';
345
346 if (!delpwent(pwd))
347 cmderr(EX_IOERR, "Error updating passwd file: %s\n", strerror(errno));
348
349 if (cnf->nispasswd && *cnf->nispasswd=='/' && !delnispwent(cnf->nispasswd, a_name->val))
350 perror("WARNING: NIS passwd update");
351
352 editgroups(a_name->val, NULL);
353
354 pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid);
355
356 /*
357 * Remove mail file
358 */
359 remove(file);
360
361 /*
362 * Remove at jobs
363 */
364 if (getpwuid(uid) == NULL)
365 rmat(uid);
366
367 /*
368 * Remove home directory and contents
369 */
370 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) {
371 if (stat(home, &st) != -1) {
372 rm_r(home, uid);
373 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved",
374 a_name->val, (long) uid, home,
375 stat(home, &st) == -1 ? "" : "not completely ");
376 }
377 }
378 return EXIT_SUCCESS;
379 } else if (mode == M_PRINT)
380 return print_user(pwd, getarg(args, 'P') != NULL);
381
382 /*
383 * The rest is edit code
384 */
385 if ((arg = getarg(args, 'l')) != NULL) {
386 if (strcmp(pwd->pw_name, "root") == 0)
387 cmderr(EX_DATAERR, "can't rename `root' account\n");
388 pwd->pw_name = pw_checkname((u_char *)arg->val, 0);
389 }
390 if ((arg = getarg(args, 'u')) != NULL && isdigit(*arg->val)) {
391 pwd->pw_uid = (uid_t) atol(arg->val);
392 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
393 cmderr(EX_DATAERR, "can't change uid of `root' account\n");
394 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
395 fprintf(stderr, "WARNING: account `%s' will have a uid of 0 (superuser access!)\n", pwd->pw_name);
396 }
397 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) /* Already checked this */
398 pwd->pw_gid = (gid_t) getgrnam(cnf->default_group)->gr_gid;
399
400 if ((arg = getarg(args, 'p')) != NULL) {
401 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0)
402 pwd->pw_change = 0;
403 else {
404 time_t now = time(NULL);
405 time_t expire = parse_date(now, arg->val);
406
407 if (now == expire)
408 cmderr(EX_DATAERR, "Invalid password change date `%s'\n", arg->val);
409 pwd->pw_change = expire;
410 }
411 }
412 if ((arg = getarg(args, 'e')) != NULL) {
413 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0)
414 pwd->pw_expire = 0;
415 else {
416 time_t now = time(NULL);
417 time_t expire = parse_date(now, arg->val);
418
419 if (now == expire)
420 cmderr(EX_DATAERR, "Invalid account expiry date `%s'\n", arg->val);
421 pwd->pw_expire = expire;
422 }
423 }
424 if ((arg = getarg(args, 's')) != NULL)
425 pwd->pw_shell = shell_path(cnf->shelldir, cnf->shells, arg->val);
426
427 if (getarg(args, 'L'))
428 pwd->pw_class = cnf->default_class;
429
430 if ((arg = getarg(args, 'd')) != NULL) {
431 if (stat(pwd->pw_dir = arg->val, &st) == -1) {
432 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0)
433 fprintf(stderr, "WARNING: home `%s' does not exist\n", pwd->pw_dir);
434 } else if (!S_ISDIR(st.st_mode))
435 fprintf(stderr, "WARNING: home `%s' is not a directory\n", pwd->pw_dir);
436 }
437
438 if ((arg = getarg(args, 'w')) != NULL && getarg(args, 'h') == NULL)
439 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
440
441 } else {
442 if (a_name == NULL) /* Required */
443 cmderr(EX_DATAERR, "login name required\n");
444 else if ((pwd = getpwnam(a_name->val)) != NULL) /* Exists */
445 cmderr(EX_DATAERR, "login name `%s' already exists\n", a_name->val);
446
447 /*
448 * Now, set up defaults for a new user
449 */
450 pwd = &fakeuser;
451 pwd->pw_name = a_name->val;
452 pwd->pw_class = cnf->default_class ? cnf->default_class : "";
453 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
454 pwd->pw_uid = pw_uidpolicy(cnf, args);
455 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid);
456 pwd->pw_change = pw_pwdpolicy(cnf, args);
457 pwd->pw_expire = pw_exppolicy(cnf, args);
458 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name);
459 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL);
460
461 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
462 fprintf(stderr, "WARNING: new account `%s' has a uid of 0 (superuser access!)\n", pwd->pw_name);
463 }
464
465 /*
466 * Shared add/edit code
467 */
468 if ((arg = getarg(args, 'c')) != NULL)
469 pwd->pw_gecos = pw_checkname((u_char *)arg->val, 1);
470
471 if ((arg = getarg(args, 'h')) != NULL) {
472 if (strcmp(arg->val, "-") == 0)
473 pwd->pw_passwd = "*"; /* No access */
474 else {
475 int fd = atoi(arg->val);
476 int b;
477 int istty = isatty(fd);
478 struct termios t;
479
480 if (istty) {
481 if (tcgetattr(fd, &t) == -1)
482 istty = 0;
483 else {
484 struct termios n = t;
485
486 /* Disable echo */
487 n.c_lflag &= ~(ECHO);
488 tcsetattr(fd, TCSANOW, &n);
489 printf("%sassword for user %s:", (mode == M_UPDATE) ? "New p" : "P", pwd->pw_name);
490 fflush(stdout);
491 }
492 }
493 b = read(fd, line, sizeof(line) - 1);
494 if (istty) { /* Restore state */
495 tcsetattr(fd, TCSANOW, &t);
496 fputc('\n', stdout);
497 fflush(stdout);
498 }
499 if (b < 0) {
500 perror("-h file descriptor");
501 return EX_IOERR;
502 }
503 line[b] = '\0';
504 if ((p = strpbrk(line, " \t\r\n")) != NULL)
505 *p = '\0';
506 if (!*line)
507 cmderr(EX_DATAERR, "empty password read on file descriptor %d\n", fd);
508 pwd->pw_passwd = pw_pwcrypt(line);
509 }
510 }
511
512 /*
513 * Special case: -N only displays & exits
514 */
515 if (getarg(args, 'N') != NULL)
516 return print_user(pwd, getarg(args, 'P') != NULL);
517
518 r = r1 = 1;
519 if (mode == M_ADD) {
520 r = addpwent(pwd);
521 if (r && cnf->nispasswd && *cnf->nispasswd=='/')
522 r1 = addnispwent(cnf->nispasswd, pwd);
523 } else if (mode == M_UPDATE) {
524 r = chgpwent(a_name->val, pwd);
525 if (r && cnf->nispasswd && *cnf->nispasswd=='/')
526 r1 = chgnispwent(cnf->nispasswd, a_name->val, pwd);
527 }
528
529 if (!r) {
530 perror("password update");
531 return EX_IOERR;
532 } else if (!r1) {
533 perror("WARNING: NIS password update");
534 /* Keep on trucking */
535 }
536
537 /*
538 * Ok, user is created or changed - now edit group file
539 */
540
541 if (mode == M_ADD || getarg(args, 'G') != NULL)
542 editgroups(pwd->pw_name, cnf->groups);
543
544 /* pwd may have been invalidated */
545 if ((pwd = getpwnam(a_name->val)) == NULL)
546 cmderr(EX_NOUSER, "user '%s' disappeared during update\n", a_name->val);
547
548 grp = getgrgid(pwd->pw_gid);
549 pw_log(cnf, mode, W_USER, "%s(%ld):%s(%d):%s:%s:%s",
550 pwd->pw_name, (long) pwd->pw_uid,
551 grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1),
552 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
553
554 /*
555 * If adding, let's touch and chown the user's mail file. This is not
556 * strictly necessary under BSD with a 0755 maildir but it also
557 * doesn't hurt anything to create the empty mailfile
558 */
559 if (mode == M_ADD) {
560 FILE *fp;
561
562 sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
563 close(open(line, O_RDWR | O_CREAT, 0600)); /* Preserve contents &
564 * mtime */
565 chown(line, pwd->pw_uid, pwd->pw_gid);
566
567 /*
568 * Send mail to the new user as well, if we are asked to
569 */
570 if (cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) {
571 FILE *pfp = popen(_PATH_SENDMAIL " -t", "w");
572
573 if (pfp == NULL)
574 perror("sendmail");
575 else {
576 fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name);
577 while (fgets(line, sizeof(line), fp) != NULL) {
578 /* Do substitutions? */
579 fputs(line, pfp);
580 }
581 pclose(pfp);
582 pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent",
583 pwd->pw_name, (long) pwd->pw_uid);
584 }
585 fclose(fp);
586 }
587 }
588 /*
589 * Finally, let's create and populate the user's home directory. Note
590 * that this also `works' for editing users if -m is used, but
591 * existing files will *not* be overwritten.
592 */
593 if (getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
594 copymkdir(pwd->pw_dir, cnf->dotdir, 0755, pwd->pw_uid, pwd->pw_gid);
595 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made",
596 pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir);
597 }
598 return EXIT_SUCCESS;
599 }
600
601
602 static uid_t
603 pw_uidpolicy(struct userconf * cnf, struct cargs * args)
604 {
605 struct passwd *pwd;
606 uid_t uid = (uid_t) - 1;
607 struct carg *a_uid = getarg(args, 'u');
608
609 /*
610 * Check the given uid, if any
611 */
612 if (a_uid != NULL) {
613 uid = (uid_t) atol(a_uid->val);
614
615 if ((pwd = getpwuid(uid)) != NULL && getarg(args, 'o') == NULL)
616 cmderr(EX_DATAERR, "uid `%ld' has already been allocated\n", (long) pwd->pw_uid);
617 } else {
618 struct bitmap bm;
619
620 /*
621 * We need to allocate the next available uid under one of
622 * two policies a) Grab the first unused uid b) Grab the
623 * highest possible unused uid
624 */
625 if (cnf->min_uid >= cnf->max_uid) { /* Sanity
626 * claus^H^H^H^Hheck */
627 cnf->min_uid = 1000;
628 cnf->max_uid = 32000;
629 }
630 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
631
632 /*
633 * Now, let's fill the bitmap from the password file
634 */
635 setpwent();
636 while ((pwd = getpwent()) != NULL)
637 if (pwd->pw_uid >= (int) cnf->min_uid && pwd->pw_uid <= (int) cnf->max_uid)
638 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
639 endpwent();
640
641 /*
642 * Then apply the policy, with fallback to reuse if necessary
643 */
644 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
645 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
646
647 /*
648 * Another sanity check
649 */
650 if (uid < cnf->min_uid || uid > cnf->max_uid)
651 cmderr(EX_SOFTWARE, "unable to allocate a new uid - range fully used\n");
652 bm_dealloc(&bm);
653 }
654 return uid;
655 }
656
657
658 static uid_t
659 pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer)
660 {
661 struct group *grp;
662 gid_t gid = (uid_t) - 1;
663 struct carg *a_gid = getarg(args, 'g');
664
665 /*
666 * If no arg given, see if default can help out
667 */
668 if (a_gid == NULL && cnf->default_group && *cnf->default_group)
669 a_gid = addarg(args, 'g', cnf->default_group);
670
671 /*
672 * Check the given gid, if any
673 */
674 setgrent();
675 if (a_gid != NULL) {
676 if ((grp = getgrnam(a_gid->val)) == NULL) {
677 gid = (gid_t) atol(a_gid->val);
678 if ((gid == 0 && !isdigit(*a_gid->val)) || (grp = getgrgid(gid)) == NULL)
679 cmderr(EX_NOUSER, "group `%s' is not defined\n", a_gid->val);
680 }
681 gid = grp->gr_gid;
682 } else if ((grp = getgrnam(nam)) != NULL && grp->gr_mem[0] == NULL) {
683 gid = grp->gr_gid; /* Already created? Use it anyway... */
684 } else {
685 struct cargs grpargs;
686 char tmp[32];
687
688 LIST_INIT(&grpargs);
689 addarg(&grpargs, 'n', nam);
690
691 /*
692 * We need to auto-create a group with the user's name. We
693 * can send all the appropriate output to our sister routine
694 * bit first see if we can create a group with gid==uid so we
695 * can keep the user and group ids in sync. We purposely do
696 * NOT check the gid range if we can force the sync. If the
697 * user's name dups an existing group, then the group add
698 * function will happily handle that case for us and exit.
699 */
700 if (getgrgid(prefer) == NULL) {
701 sprintf(tmp, "%lu", (unsigned long) prefer);
702 addarg(&grpargs, 'g', tmp);
703 }
704 if (getarg(args, 'N'))
705 {
706 addarg(&grpargs, 'N', NULL);
707 addarg(&grpargs, 'q', NULL);
708 gid = pw_group(cnf, M_NEXT, &grpargs);
709 }
710 else
711 {
712 pw_group(cnf, M_ADD, &grpargs);
713 if ((grp = getgrnam(nam)) != NULL)
714 gid = grp->gr_gid;
715 }
716 a_gid = grpargs.lh_first;
717 while (a_gid != NULL) {
718 struct carg *t = a_gid->list.le_next;
719 LIST_REMOVE(a_gid, list);
720 a_gid = t;
721 }
722 }
723 endgrent();
724 return gid;
725 }
726
727
728 static time_t
729 pw_pwdpolicy(struct userconf * cnf, struct cargs * args)
730 {
731 time_t result = 0;
732 time_t now = time(NULL);
733 struct carg *arg = getarg(args, 'e');
734
735 if (arg != NULL) {
736 if ((result = parse_date(now, arg->val)) == now)
737 cmderr(EX_DATAERR, "invalid date/time `%s'\n", arg->val);
738 } else if (cnf->password_days > 0)
739 result = now + ((long) cnf->password_days * 86400L);
740 return result;
741 }
742
743
744 static time_t
745 pw_exppolicy(struct userconf * cnf, struct cargs * args)
746 {
747 time_t result = 0;
748 time_t now = time(NULL);
749 struct carg *arg = getarg(args, 'e');
750
751 if (arg != NULL) {
752 if ((result = parse_date(now, arg->val)) == now)
753 cmderr(EX_DATAERR, "invalid date/time `%s'\n", arg->val);
754 } else if (cnf->expire_days > 0)
755 result = now + ((long) cnf->expire_days * 86400L);
756 return result;
757 }
758
759
760 static char *
761 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user)
762 {
763 struct carg *arg = getarg(args, 'd');
764
765 if (arg)
766 return arg->val;
767 else {
768 static char home[128];
769
770 if (cnf->home == NULL || *cnf->home == '\0')
771 cmderr(EX_CONFIG, "no base home directory set\n");
772 sprintf(home, "%s/%s", cnf->home, user);
773 return home;
774 }
775 }
776
777 static char *
778 shell_path(char const * path, char *shells[], char *sh)
779 {
780 if (sh != NULL && (*sh == '/' || *sh == '\0'))
781 return sh; /* specified full path or forced none */
782 else {
783 char *p;
784 char paths[_UC_MAXLINE];
785
786 /*
787 * We need to search paths
788 */
789 strncpy(paths, path, sizeof paths);
790 paths[sizeof paths - 1] = '\0';
791 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
792 int i;
793 static char shellpath[256];
794
795 if (sh != NULL) {
796 sprintf(shellpath, "%s/%s", p, sh);
797 if (access(shellpath, X_OK) == 0)
798 return shellpath;
799 } else
800 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
801 sprintf(shellpath, "%s/%s", p, shells[i]);
802 if (access(shellpath, X_OK) == 0)
803 return shellpath;
804 }
805 }
806 if (sh == NULL)
807 cmderr(EX_OSFILE, "can't find shell `%s' in shell paths\n", sh);
808 cmderr(EX_CONFIG, "no default shell available or defined\n");
809 return NULL;
810 }
811 }
812
813
814 static char *
815 pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell)
816 {
817 char *sh = newshell;
818 struct carg *arg = getarg(args, 's');
819
820 if (newshell == NULL && arg != NULL)
821 sh = arg->val;
822 return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default);
823 }
824
825 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.";
826
827 char *
828 pw_pwcrypt(char *password)
829 {
830 int i;
831 char salt[12];
832
833 static char buf[256];
834
835 /*
836 * Calculate a salt value
837 */
838 srandom((unsigned) (time(NULL) ^ getpid()));
839 for (i = 0; i < 8; i++)
840 salt[i] = chars[random() % 63];
841 salt[i] = '\0';
842
843 return strcpy(buf, crypt(password, salt));
844 }
845
846 #if defined(__FreeBSD__)
847
848 #if defined(USE_MD5RAND)
849 u_char *
850 pw_getrand(u_char *buf, int len) /* cryptographically secure rng */
851 {
852 int i;
853 for (i=0;i<len;i+=16) {
854 u_char ubuf[16];
855
856 MD5_CTX md5_ctx;
857 struct timeval tv, tvo;
858 struct rusage ru;
859 int n=0;
860 int t;
861
862 MD5Init (&md5_ctx);
863 t=getpid();
864 MD5Update (&md5_ctx, (u_char*)&t, sizeof t);
865 t=getppid();
866 MD5Update (&md5_ctx, (u_char*)&t, sizeof t);
867 gettimeofday (&tvo, NULL);
868 do {
869 getrusage (RUSAGE_SELF, &ru);
870 MD5Update (&md5_ctx, (u_char*)&ru, sizeof ru);
871 gettimeofday (&tv, NULL);
872 MD5Update (&md5_ctx, (u_char*)&tv, sizeof tv);
873 } while (n++<20 || tv.tv_usec-tvo.tv_usec<100*1000);
874 MD5Final (ubuf, &md5_ctx);
875 memcpy(buf+i, ubuf, MIN(16, len-n));
876 }
877 return buf;
878 }
879
880 #else /* Use random device (preferred) */
881
882 static u_char *
883 pw_getrand(u_char *buf, int len)
884 {
885 int fd;
886 fd = open("/dev/urandom", O_RDONLY);
887 if (fd==-1)
888 cmderr(EX_OSFILE, "can't open /dev/urandom: %s\n", strerror(errno));
889 else if (read(fd, buf, len)!=len)
890 cmderr(EX_IOERR, "read error on /dev/urandom\n");
891 close(fd);
892 return buf;
893 }
894
895 #endif
896
897 #else /* Portable version */
898
899 static u_char *
900 pw_getrand(u_char *buf, int len)
901 {
902 int i;
903
904 for (i = 0; i < len; i++) {
905 unsigned val = random();
906 /* Use all bits in the random value */
907 buf[i]=(u_char)((val >> 24) ^ (val >> 16) ^ (val >> 8) ^ val);
908 }
909 return buf;
910 }
911
912 #endif
913
914 static char *
915 pw_password(struct userconf * cnf, struct cargs * args, char const * user)
916 {
917 int i, l;
918 char pwbuf[32];
919 u_char rndbuf[sizeof pwbuf];
920
921 switch (cnf->default_password) {
922 case -1: /* Random password */
923 srandom((unsigned) (time(NULL) ^ getpid()));
924 l = (random() % 8 + 8); /* 8 - 16 chars */
925 pw_getrand(rndbuf, l);
926 for (i = 0; i < l; i++)
927 pwbuf[i] = chars[rndbuf[i] % sizeof(chars)];
928 pwbuf[i] = '\0';
929
930 /*
931 * We give this information back to the user
932 */
933 if (getarg(args, 'h') == NULL && getarg(args, 'N') == NULL) {
934 if (isatty(1))
935 printf("Password for '%s' is: ", user);
936 printf("%s\n", pwbuf);
937 fflush(stdout);
938 }
939 break;
940
941 case -2: /* No password at all! */
942 return "";
943
944 case 0: /* No login - default */
945 default:
946 return "*";
947
948 case 1: /* user's name */
949 strncpy(pwbuf, user, sizeof pwbuf);
950 pwbuf[sizeof pwbuf - 1] = '\0';
951 break;
952 }
953 return pw_pwcrypt(pwbuf);
954 }
955
956
957 static int
958 print_user(struct passwd * pwd, int pretty)
959 {
960 if (!pretty) {
961 char buf[_UC_MAXLINE];
962
963 fmtpwent(buf, pwd);
964 fputs(buf, stdout);
965 } else {
966 int j;
967 char *p;
968 struct group *grp = getgrgid(pwd->pw_gid);
969 char uname[60] = "User &", office[60] = "[None]",
970 wphone[60] = "[None]", hphone[60] = "[None]";
971 char acexpire[32] = "[None]", pwexpire[32] = "[None]";
972 struct tm * tptr;
973
974 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
975 strncpy(uname, p, sizeof uname);
976 uname[sizeof uname - 1] = '\0';
977 if ((p = strtok(NULL, ",")) != NULL) {
978 strncpy(office, p, sizeof office);
979 office[sizeof office - 1] = '\0';
980 if ((p = strtok(NULL, ",")) != NULL) {
981 strncpy(wphone, p, sizeof wphone);
982 wphone[sizeof wphone - 1] = '\0';
983 if ((p = strtok(NULL, "")) != NULL) {
984 strncpy(hphone, p, sizeof hphone);
985 hphone[sizeof hphone - 1] = '\0';
986 }
987 }
988 }
989 }
990 /*
991 * Handle '&' in gecos field
992 */
993 if ((p = strchr(uname, '&')) != NULL) {
994 int l = strlen(pwd->pw_name);
995 int m = strlen(p);
996
997 memmove(p + l, p + 1, m);
998 memmove(p, pwd->pw_name, l);
999 *p = (char) toupper(*p);
1000 }
1001 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
1002 strftime(acexpire, sizeof acexpire, "%c", tptr);
1003 if (pwd->pw_change > (time_t)9 && (tptr = localtime(&pwd->pw_change)) != NULL)
1004 strftime(pwexpire, sizeof pwexpire, "%c", tptr);
1005 printf("Login Name: %-15s #%-12ld Group: %-15s #%ld\n"
1006 " Full Name: %s\n"
1007 " Home: %-26.26s Class: %s\n"
1008 " Shell: %-26.26s Office: %s\n"
1009 "Work Phone: %-26.26s Home Phone: %s\n"
1010 "Acc Expire: %-26.26s Pwd Expire: %s\n",
1011 pwd->pw_name, (long) pwd->pw_uid,
1012 grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid,
1013 uname, pwd->pw_dir, pwd->pw_class,
1014 pwd->pw_shell, office, wphone, hphone,
1015 acexpire, pwexpire);
1016 setgrent();
1017 j = 0;
1018 while ((grp=getgrent()) != NULL)
1019 {
1020 int i = 0;
1021 while (grp->gr_mem[i] != NULL)
1022 {
1023 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0)
1024 {
1025 printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name);
1026 break;
1027 }
1028 ++i;
1029 }
1030 }
1031 endgrent();
1032 printf("%s\n", j ? "\n" : "");
1033 }
1034 return EXIT_SUCCESS;
1035 }
1036
1037 char *
1038 pw_checkname(u_char *name, int gecos)
1039 {
1040 int l = 0;
1041 char const *notch = gecos ? ":!@" : " ,\t:+&#%$^()!@~*?<>=|\\/\"";
1042
1043 while (name[l]) {
1044 if (strchr(notch, name[l]) != NULL || name[l] < ' ' || name[l] == 127 ||
1045 (!gecos && l==0 && name[l] == '-') || /* leading '-' */
1046 (!gecos && name[l] & 0x80)) /* 8-bit */
1047 cmderr(EX_DATAERR, (name[l] >= ' ' && name[l] < 127)
1048 ? "invalid character `%c' in field\n"
1049 : "invalid character 0x%02x in field\n",
1050 name[l]);
1051 ++l;
1052 }
1053 if (!gecos && l > LOGNAMESIZE)
1054 cmderr(EX_DATAERR, "name too long `%s'\n", name);
1055 return (char *)name;
1056 }
1057
1058
1059 static void
1060 rmat(uid_t uid)
1061 {
1062 DIR *d = opendir("/var/at/jobs");
1063
1064 if (d != NULL) {
1065 struct dirent *e;
1066
1067 while ((e = readdir(d)) != NULL) {
1068 struct stat st;
1069
1070 if (strncmp(e->d_name, ".lock", 5) != 0 &&
1071 stat(e->d_name, &st) == 0 &&
1072 !S_ISDIR(st.st_mode) &&
1073 st.st_uid == uid) {
1074 char tmp[MAXPATHLEN];
1075
1076 sprintf(tmp, "/usr/bin/atrm %s", e->d_name);
1077 system(tmp);
1078 }
1079 }
1080 closedir(d);
1081 }
1082 }
1083
1084 static void
1085 rmskey(char const * name)
1086 {
1087 static const char etcskey[] = "/etc/skeykeys";
1088 FILE *fp = fopen(etcskey, "r+");
1089
1090 if (fp != NULL) {
1091 char tmp[1024];
1092 off_t atofs = 0;
1093 int length = strlen(name);
1094
1095 while (fgets(tmp, sizeof tmp, fp) != NULL) {
1096 if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') {
1097 if (fseek(fp, atofs, SEEK_SET) == 0) {
1098 fwrite("#", 1, 1, fp); /* Comment username out */
1099 }
1100 break;
1101 }
1102 atofs = ftell(fp);
1103 }
1104 /*
1105 * If we got an error of any sort, don't update!
1106 */
1107 fclose(fp);
1108 }
1109 }
1110
A port of FreeBSDs pw for Darwin