1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (C) 1996
5 * David L. Nugent. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29
30 #include <sys/param.h>
31 #include <sys/wait.h>
32
33 #include <assert.h>
34 #include <ctype.h>
35 #include <dirent.h>
36 #include <err.h>
37 #include <errno.h>
38 #include <fcntl.h>
39 #include <grp.h>
40 #include <pwd.h>
41 #include <libutil.h>
42 #include <login_cap.h>
43 #include <paths.h>
44 #include <string.h>
45 #include <sysexits.h>
46 #include <termios.h>
47 #include <unistd.h>
48 #include <spawn.h>
49
50 #include "pw.h"
51 #include "bitmap.h"
52 #include "psdate.h"
53
54 #define LOGNAMESIZE (MAXLOGNAME-1)
55
56 extern char **environ;
57 static char locked_str[] = "*LOCKED*";
58
59 static struct passwd fakeuser = {
60 "nouser",
61 "*",
62 -1,
63 -1,
64 0,
65 "",
66 "User &",
67 "/nonexistent",
68 "/bin/sh",
69 0,
70 0
71 };
72
73 static int print_user(struct passwd *pwd, bool pretty, bool v7);
74 static uid_t pw_uidpolicy(struct userconf *cnf, intmax_t id);
75 static uid_t pw_gidpolicy(struct userconf *cnf, char *grname, char *nam,
76 gid_t prefer, bool dryrun);
77 static char *pw_homepolicy(struct userconf * cnf, char *homedir,
78 const char *user);
79 static char *pw_shellpolicy(struct userconf * cnf);
80 static char *pw_password(struct userconf * cnf, char const * user);
81 static char *shell_path(char const * path, char *shells[], char *sh);
82 static void rmat(uid_t uid);
83
84 static void
mkdir_home_parents(int dfd,const char * dir)85 mkdir_home_parents(int dfd, const char *dir)
86 {
87 struct stat st;
88 char *dirs, *tmp;
89 mode_t pumask;
90
91 pumask = umask(0);
92 umask(pumask);
93
94 if (*dir != '/')
95 errx(EX_DATAERR, "invalid base directory for home '%s'", dir);
96 dir++;
97
98 if (fstatat(dfd, dir, &st, 0) != -1) {
99 if (S_ISDIR(st.st_mode))
100 return;
101 errx(EX_OSFILE, "root home `/%s' is not a directory", dir);
102 }
103
104 dirs = strdup(dir);
105 if (dirs == NULL)
106 errx(EX_UNAVAILABLE, "out of memory");
107
108 tmp = strrchr(dirs, '/');
109 if (tmp == NULL) {
110 free(dirs);
111 return;
112 }
113 tmp[0] = '\0';
114
115 tmp = dirs;
116 if (fstatat(dfd, dirs, &st, 0) == -1) {
117 while ((tmp = strchr(tmp + 1, '/')) != NULL) {
118 *tmp = '\0';
119 if (fstatat(dfd, dirs, &st, 0) == -1) {
120 if (mkdirat(dfd, dirs, _DEF_DIRMODE) == -1)
121 err(EX_OSFILE,
122 "'%s' (home parent) is not a directory",
123 dirs);
124 if (fchownat(dfd, dirs, 0, 0, 0) != 0)
125 warn("chown(%s)", dirs);
126 metalog_emit(dir,
127 (_DEF_DIRMODE | S_IFDIR) & ~pumask, 0, 0,
128 0);
129 }
130 *tmp = '/';
131 }
132 }
133 if (fstatat(dfd, dirs, &st, 0) == -1) {
134 if (mkdirat(dfd, dirs, _DEF_DIRMODE) == -1)
135 err(EX_OSFILE, "'%s' (home parent) is not a directory", dirs);
136 if (fchownat(dfd, dirs, 0, 0, 0) != 0)
137 warn("chown(%s)", dirs);
138 metalog_emit(dirs, (_DEF_DIRMODE | S_IFDIR) & ~pumask, 0, 0, 0);
139 }
140
141 free(dirs);
142 }
143
144 static void
create_and_populate_homedir(struct userconf * cnf,struct passwd * pwd,const char * skeldir,mode_t homemode,bool update)145 create_and_populate_homedir(struct userconf *cnf, struct passwd *pwd,
146 const char *skeldir, mode_t homemode, bool update)
147 {
148 int skelfd = -1;
149
150 /* Create home parents directories */
151 mkdir_home_parents(conf.rootfd, pwd->pw_dir);
152
153 if (skeldir != NULL && *skeldir != '\0') {
154 if (*skeldir == '/')
155 skeldir++;
156 skelfd = openat(conf.rootfd, skeldir, O_DIRECTORY|O_CLOEXEC);
157 }
158
159 copymkdir(conf.rootfd, pwd->pw_dir, skelfd, homemode, pwd->pw_uid,
160 pwd->pw_gid, 0);
161 pw_log(cnf, update ? M_MODIFY : M_ADD, W_USER, "%s(%ju) home %s made",
162 pwd->pw_name, (uintmax_t)pwd->pw_uid, pwd->pw_dir);
163 }
164
165 static int
pw_set_passwd(struct passwd * pwd,int fd,bool precrypted,bool update)166 pw_set_passwd(struct passwd *pwd, int fd, bool precrypted, bool update)
167 {
168 int b, istty;
169 struct termios t, n;
170 login_cap_t *lc;
171 char line[_PASSWORD_LEN+1];
172 char *p;
173
174 if (fd == '-') {
175 if (!pwd->pw_passwd || *pwd->pw_passwd != '*') {
176 pwd->pw_passwd = "*"; /* No access */
177 return (1);
178 }
179 return (0);
180 }
181
182 if ((istty = isatty(fd))) {
183 if (tcgetattr(fd, &t) == -1)
184 istty = 0;
185 else {
186 n = t;
187 n.c_lflag &= ~(ECHO);
188 tcsetattr(fd, TCSANOW, &n);
189 printf("%s%spassword for user %s:",
190 update ? "new " : "",
191 precrypted ? "encrypted " : "",
192 pwd->pw_name);
193 fflush(stdout);
194 }
195 }
196 b = read(fd, line, sizeof(line) - 1);
197 if (istty) { /* Restore state */
198 tcsetattr(fd, TCSANOW, &t);
199 fputc('\n', stdout);
200 fflush(stdout);
201 }
202
203 if (b < 0)
204 err(EX_IOERR, "-%c file descriptor",
205 precrypted ? 'H' : 'h');
206 line[b] = '\0';
207 if ((p = strpbrk(line, "\r\n")) != NULL)
208 *p = '\0';
209 if (!*line)
210 errx(EX_DATAERR, "empty password read on file descriptor %d",
211 fd);
212 if (precrypted) {
213 if (strchr(line, ':') != NULL)
214 errx(EX_DATAERR, "bad encrypted password");
215 pwd->pw_passwd = strdup(line);
216 } else {
217 lc = login_getpwclass(pwd);
218 if (lc == NULL ||
219 login_setcryptfmt(lc, "sha512", NULL) == NULL)
220 warn("setting crypt(3) format");
221 login_close(lc);
222 pwd->pw_passwd = pw_pwcrypt(line);
223 }
224 return (1);
225 }
226
227 static void
perform_chgpwent(const char * name,struct passwd * pwd,char * nispasswd)228 perform_chgpwent(const char *name, struct passwd *pwd, char *nispasswd)
229 {
230 int rc;
231 struct passwd *nispwd;
232
233 /* duplicate for nis so that chgpwent is not modifying before NIS */
234 if (nispasswd && *nispasswd == '/')
235 nispwd = pw_dup(pwd);
236
237 rc = chgpwent(name, pwd);
238 if (rc == -1)
239 errx(EX_IOERR, "user '%s' does not exist (NIS?)", pwd->pw_name);
240 else if (rc != 0)
241 err(EX_IOERR, "passwd file update");
242
243 if (nispasswd && *nispasswd == '/') {
244 rc = chgnispwent(nispasswd, name, nispwd);
245 if (rc == -1)
246 warn("User '%s' not found in NIS passwd", pwd->pw_name);
247 else if (rc != 0)
248 warn("NIS passwd update");
249 /* NOTE: NIS-only update errors are not fatal */
250 }
251 }
252
253 static void
pw_check_root(void)254 pw_check_root(void)
255 {
256 if (!conf.altroot && geteuid() != 0)
257 errx(EX_NOPERM, "you must be root");
258 }
259
260 /*
261 * The M_LOCK and M_UNLOCK functions simply add or remove
262 * a "*LOCKED*" prefix from in front of the password to
263 * prevent it decoding correctly, and therefore prevents
264 * access. Of course, this only prevents access via
265 * password authentication (not ssh, kerberos or any
266 * other method that does not use the UNIX password) but
267 * that is a known limitation.
268 */
269 static int
pw_userlock(char * arg1,int mode)270 pw_userlock(char *arg1, int mode)
271 {
272 struct passwd *pwd = NULL;
273 char *passtmp = NULL;
274 char *name;
275 bool locked = false;
276 uid_t id = (uid_t)-1;
277
278 pw_check_root();
279
280 if (arg1 == NULL)
281 errx(EX_DATAERR, "username or id required");
282
283 name = arg1;
284 if (arg1[strspn(name, "0123456789")] == '\0')
285 id = pw_checkid(name, UID_MAX);
286
287 pwd = GETPWNAM(pw_checkname(name, 0));
288 if (pwd == NULL && id != (uid_t)-1) {
289 pwd = GETPWUID(id);
290 if (pwd != NULL)
291 name = pwd->pw_name;
292 }
293 if (pwd == NULL) {
294 if (id == (uid_t)-1)
295 errx(EX_NOUSER, "no such name or uid `%ju'", (uintmax_t) id);
296 errx(EX_NOUSER, "no such user `%s'", name);
297 }
298
299 if (name == NULL)
300 name = pwd->pw_name;
301
302 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str) -1) == 0)
303 locked = true;
304 if (mode == M_LOCK && locked)
305 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name);
306 if (mode == M_UNLOCK && !locked)
307 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name);
308
309 if (mode == M_LOCK) {
310 asprintf(&passtmp, "%s%s", locked_str, pwd->pw_passwd);
311 if (passtmp == NULL) /* disaster */
312 errx(EX_UNAVAILABLE, "out of memory");
313 pwd->pw_passwd = passtmp;
314 } else {
315 pwd->pw_passwd += sizeof(locked_str)-1;
316 }
317
318 perform_chgpwent(name, pwd, NULL);
319 free(passtmp);
320
321 return (EXIT_SUCCESS);
322 }
323
324 static uid_t
pw_uidpolicy(struct userconf * cnf,intmax_t id)325 pw_uidpolicy(struct userconf * cnf, intmax_t id)
326 {
327 struct passwd *pwd;
328 struct bitmap bm;
329 uid_t uid = (uid_t) - 1;
330
331 /*
332 * Check the given uid, if any
333 */
334 if (id >= 0) {
335 uid = (uid_t) id;
336
337 if ((pwd = GETPWUID(uid)) != NULL && conf.checkduplicate)
338 errx(EX_DATAERR, "uid `%ju' has already been allocated",
339 (uintmax_t)pwd->pw_uid);
340 return (uid);
341 }
342 /*
343 * We need to allocate the next available uid under one of
344 * two policies a) Grab the first unused uid b) Grab the
345 * highest possible unused uid
346 */
347 if (cnf->min_uid >= cnf->max_uid) { /* Sanity
348 * claus^H^H^H^Hheck */
349 cnf->min_uid = 1000;
350 cnf->max_uid = 32000;
351 }
352 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
353
354 /*
355 * Now, let's fill the bitmap from the password file
356 */
357 SETPWENT();
358 while ((pwd = GETPWENT()) != NULL)
359 if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid)
360 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
361 ENDPWENT();
362
363 /*
364 * Then apply the policy, with fallback to reuse if necessary
365 */
366 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
367 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
368
369 /*
370 * Another sanity check
371 */
372 if (uid < cnf->min_uid || uid > cnf->max_uid)
373 errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used");
374 bm_dealloc(&bm);
375 return (uid);
376 }
377
378 static uid_t
pw_gidpolicy(struct userconf * cnf,char * grname,char * nam,gid_t prefer,bool dryrun)379 pw_gidpolicy(struct userconf *cnf, char *grname, char *nam, gid_t prefer, bool dryrun)
380 {
381 struct group *grp;
382 gid_t gid = (uid_t) - 1;
383
384 /*
385 * Check the given gid, if any
386 */
387 SETGRENT();
388 if (grname) {
389 if ((grp = GETGRNAM(grname)) == NULL) {
390 gid = pw_checkid(grname, GID_MAX);
391 grp = GETGRGID(gid);
392 }
393 gid = grp->gr_gid;
394 } else if ((grp = GETGRNAM(nam)) != NULL) {
395 gid = grp->gr_gid; /* Already created? Use it anyway... */
396 } else {
397 intmax_t grid = -1;
398
399 /*
400 * We need to auto-create a group with the user's name. We
401 * can send all the appropriate output to our sister routine
402 * bit first see if we can create a group with gid==uid so we
403 * can keep the user and group ids in sync. We purposely do
404 * NOT check the gid range if we can force the sync. If the
405 * user's name dups an existing group, then the group add
406 * function will happily handle that case for us and exit.
407 */
408 if (GETGRGID(prefer) == NULL)
409 grid = prefer;
410 if (dryrun) {
411 gid = pw_groupnext(cnf, true);
412 } else {
413 if (grid == -1)
414 grid = pw_groupnext(cnf, true);
415 groupadd(cnf, nam, grid, NULL, -1, false, false, false);
416 if ((grp = GETGRNAM(nam)) != NULL)
417 gid = grp->gr_gid;
418 }
419 }
420 ENDGRENT();
421 return (gid);
422 }
423
424 static char *
pw_homepolicy(struct userconf * cnf,char * homedir,const char * user)425 pw_homepolicy(struct userconf * cnf, char *homedir, const char *user)
426 {
427 static char home[128];
428
429 if (homedir)
430 return (homedir);
431
432 if (cnf->home == NULL || *cnf->home == '\0')
433 errx(EX_CONFIG, "no base home directory set");
434 snprintf(home, sizeof(home), "%s/%s", cnf->home, user);
435
436 return (home);
437 }
438
439 static char *
shell_path(char const * path,char * shells[],char * sh)440 shell_path(char const * path, char *shells[], char *sh)
441 {
442 if (sh != NULL && (*sh == '/' || *sh == '\0'))
443 return sh; /* specified full path or forced none */
444 else {
445 char *p;
446 char paths[_UC_MAXLINE];
447
448 /*
449 * We need to search paths
450 */
451 strlcpy(paths, path, sizeof(paths));
452 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
453 int i;
454 static char shellpath[256];
455
456 if (sh != NULL) {
457 snprintf(shellpath, sizeof(shellpath), "%s/%s", p, sh);
458 if (access(shellpath, X_OK) == 0)
459 return shellpath;
460 } else
461 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
462 snprintf(shellpath, sizeof(shellpath), "%s/%s", p, shells[i]);
463 if (access(shellpath, X_OK) == 0)
464 return shellpath;
465 }
466 }
467 if (sh == NULL)
468 errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh);
469 errx(EX_CONFIG, "no default shell available or defined");
470 return NULL;
471 }
472 }
473
474 static char *
pw_shellpolicy(struct userconf * cnf)475 pw_shellpolicy(struct userconf * cnf)
476 {
477
478 return shell_path(cnf->shelldir, cnf->shells, cnf->shell_default);
479 }
480
481 #define SALTSIZE 32
482
483 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./";
484
485 char *
pw_pwcrypt(char * password)486 pw_pwcrypt(char *password)
487 {
488 int i;
489 char salt[SALTSIZE + 1];
490 char *cryptpw;
491 static char buf[256];
492 size_t pwlen;
493
494 /*
495 * Calculate a salt value
496 */
497 for (i = 0; i < SALTSIZE; i++)
498 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)];
499 salt[SALTSIZE] = '\0';
500
501 cryptpw = crypt(password, salt);
502 if (cryptpw == NULL)
503 errx(EX_CONFIG, "crypt(3) failure");
504 pwlen = strlcpy(buf, cryptpw, sizeof(buf));
505 assert(pwlen < sizeof(buf));
506 return (buf);
507 }
508
509 static char *
pw_password(struct userconf * cnf,char const * user)510 pw_password(struct userconf * cnf, char const * user)
511 {
512 int i, l;
513 char pwbuf[32];
514
515 switch (cnf->default_password) {
516 case P_NONE: /* No password at all! */
517 return "";
518 case P_RANDOM: /* Random password */
519 l = (arc4random() % 8 + 8); /* 8 - 16 chars */
520 for (i = 0; i < l; i++)
521 pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)];
522 pwbuf[i] = '\0';
523
524 /*
525 * We give this information back to the user
526 */
527 if (conf.fd == -1) {
528 if (isatty(STDOUT_FILENO))
529 printf("Password for '%s' is: ", user);
530 printf("%s\n", pwbuf);
531 fflush(stdout);
532 }
533 break;
534 case P_YES: /* user's name */
535 strlcpy(pwbuf, user, sizeof(pwbuf));
536 break;
537 case P_NO: /* No login - default */
538 /* FALLTHROUGH */
539 default:
540 return "*";
541 }
542 return pw_pwcrypt(pwbuf);
543 }
544
545 static int
print_user(struct passwd * pwd,bool pretty,bool v7)546 print_user(struct passwd * pwd, bool pretty, bool v7)
547 {
548 int j;
549 char *p;
550 struct group *grp = GETGRGID(pwd->pw_gid);
551 char uname[60] = "User &", office[60] = "[None]",
552 wphone[60] = "[None]", hphone[60] = "[None]";
553 char acexpire[32] = "[None]", pwexpire[32] = "[None]";
554 struct tm * tptr;
555
556 if (!pretty) {
557 p = v7 ? pw_make_v7(pwd) : pw_make(pwd);
558 printf("%s\n", p);
559 free(p);
560 return (EXIT_SUCCESS);
561 }
562
563 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
564 strlcpy(uname, p, sizeof(uname));
565 if ((p = strtok(NULL, ",")) != NULL) {
566 strlcpy(office, p, sizeof(office));
567 if ((p = strtok(NULL, ",")) != NULL) {
568 strlcpy(wphone, p, sizeof(wphone));
569 if ((p = strtok(NULL, "")) != NULL) {
570 strlcpy(hphone, p, sizeof(hphone));
571 }
572 }
573 }
574 }
575 /*
576 * Handle '&' in gecos field
577 */
578 if ((p = strchr(uname, '&')) != NULL) {
579 int l = strlen(pwd->pw_name);
580 int m = strlen(p);
581
582 memmove(p + l, p + 1, m);
583 memmove(p, pwd->pw_name, l);
584 *p = (char) toupper((unsigned char)*p);
585 }
586 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
587 strftime(acexpire, sizeof acexpire, "%c", tptr);
588 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL)
589 strftime(pwexpire, sizeof pwexpire, "%c", tptr);
590 printf("Login Name: %-15s #%-12ju Group: %-15s #%ju\n"
591 " Full Name: %s\n"
592 " Home: %-26.26s Class: %s\n"
593 " Shell: %-26.26s Office: %s\n"
594 "Work Phone: %-26.26s Home Phone: %s\n"
595 "Acc Expire: %-26.26s Pwd Expire: %s\n",
596 pwd->pw_name, (uintmax_t)pwd->pw_uid,
597 grp ? grp->gr_name : "(invalid)", (uintmax_t)pwd->pw_gid,
598 uname, pwd->pw_dir, pwd->pw_class,
599 pwd->pw_shell, office, wphone, hphone,
600 acexpire, pwexpire);
601 SETGRENT();
602 j = 0;
603 while ((grp=GETGRENT()) != NULL) {
604 int i = 0;
605 if (grp->gr_mem != NULL) {
606 while (grp->gr_mem[i] != NULL) {
607 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) {
608 printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name);
609 break;
610 }
611 ++i;
612 }
613 }
614 }
615 ENDGRENT();
616 printf("%s", j ? "\n" : "");
617 return (EXIT_SUCCESS);
618 }
619
620 char *
pw_checkname(char * name,int gecos)621 pw_checkname(char *name, int gecos)
622 {
623 char showch[8];
624 const char *badchars, *ch, *showtype;
625 int reject;
626
627 ch = name;
628 reject = 0;
629 if (gecos) {
630 /* See if the name is valid as a gecos (comment) field. */
631 badchars = ":";
632 showtype = "gecos field";
633 } else {
634 /* See if the name is valid as a userid or group. */
635 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\";";
636 showtype = "userid/group name";
637 /* Userids and groups can not have a leading '-'. */
638 if (*ch == '-')
639 reject = 1;
640 }
641 if (!reject) {
642 while (*ch) {
643 if (strchr(badchars, *ch) != NULL ||
644 (!gecos && *ch < ' ') ||
645 *ch == 127) {
646 reject = 1;
647 break;
648 }
649 /* 8-bit characters are only allowed in GECOS fields */
650 if (!gecos && (*ch & 0x80)) {
651 reject = 1;
652 break;
653 }
654 ch++;
655 }
656 }
657 /*
658 * A `$' is allowed as the final character for userids and groups,
659 * mainly for the benefit of samba.
660 */
661 if (reject && !gecos) {
662 if (*ch == '$' && *(ch + 1) == '\0') {
663 reject = 0;
664 ch++;
665 }
666 }
667 if (reject) {
668 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127)
669 ? "`%c'" : "0x%02x", *ch);
670 errx(EX_DATAERR, "invalid character %s at position %td in %s",
671 showch, (ch - name), showtype);
672 }
673 if (!gecos && (ch - name) > LOGNAMESIZE)
674 errx(EX_USAGE, "name too long `%s' (max is %d)", name,
675 LOGNAMESIZE);
676
677 return (name);
678 }
679
680 static void
rmat(uid_t uid)681 rmat(uid_t uid)
682 {
683 DIR *d = opendir("/var/at/jobs");
684
685 if (d != NULL) {
686 struct dirent *e;
687
688 while ((e = readdir(d)) != NULL) {
689 struct stat st;
690 pid_t pid;
691
692 if (strncmp(e->d_name, ".lock", 5) != 0 &&
693 stat(e->d_name, &st) == 0 &&
694 !S_ISDIR(st.st_mode) &&
695 st.st_uid == uid) {
696 const char *argv[] = {
697 "/usr/sbin/atrm",
698 e->d_name,
699 NULL
700 };
701 if (posix_spawn(&pid, argv[0], NULL, NULL,
702 (char *const *) argv, environ)) {
703 warn("Failed to execute '%s %s'",
704 argv[0], argv[1]);
705 } else
706 (void) waitpid(pid, NULL, 0);
707 }
708 }
709 closedir(d);
710 }
711 }
712
713 int
pw_user_next(int argc,char ** argv,char * name __unused)714 pw_user_next(int argc, char **argv, char *name __unused)
715 {
716 struct userconf *cnf = NULL;
717 const char *cfg = NULL;
718 int ch;
719 bool quiet = false;
720 uid_t next;
721
722 while ((ch = getopt(argc, argv, "C:q")) != -1) {
723 switch (ch) {
724 case 'C':
725 cfg = optarg;
726 break;
727 case 'q':
728 quiet = true;
729 break;
730 default:
731 usage();
732 }
733 }
734 argc -= optind;
735 argv += optind;
736 if (argc > 0)
737 usage();
738
739 if (quiet)
740 freopen(_PATH_DEVNULL, "w", stderr);
741
742 cnf = get_userconfig(cfg);
743
744 next = pw_uidpolicy(cnf, -1);
745
746 printf("%ju:", (uintmax_t)next);
747 pw_groupnext(cnf, quiet);
748
749 return (EXIT_SUCCESS);
750 }
751
752 int
pw_user_show(int argc,char ** argv,char * arg1)753 pw_user_show(int argc, char **argv, char *arg1)
754 {
755 struct passwd *pwd = NULL;
756 char *name = NULL;
757 intmax_t id = -1;
758 int ch;
759 bool all = false;
760 bool pretty = false;
761 bool force = false;
762 bool v7 = false;
763 bool quiet = false;
764
765 if (arg1 != NULL) {
766 if (arg1[strspn(arg1, "0123456789")] == '\0')
767 id = pw_checkid(arg1, UID_MAX);
768 else
769 name = arg1;
770 }
771
772 while ((ch = getopt(argc, argv, "C:qn:u:FPa7")) != -1) {
773 switch (ch) {
774 case 'C':
775 /* ignore compatibility */
776 break;
777 case 'q':
778 quiet = true;
779 break;
780 case 'n':
781 name = optarg;
782 break;
783 case 'u':
784 id = pw_checkid(optarg, UID_MAX);
785 break;
786 case 'F':
787 force = true;
788 break;
789 case 'P':
790 pretty = true;
791 break;
792 case 'a':
793 all = true;
794 break;
795 case '7':
796 v7 = true;
797 break;
798 default:
799 usage();
800 }
801 }
802 argc -= optind;
803 argv += optind;
804 if (argc > 0)
805 usage();
806
807 if (quiet)
808 freopen(_PATH_DEVNULL, "w", stderr);
809
810 if (all) {
811 SETPWENT();
812 while ((pwd = GETPWENT()) != NULL)
813 print_user(pwd, pretty, v7);
814 ENDPWENT();
815 return (EXIT_SUCCESS);
816 }
817
818 if (id < 0 && name == NULL)
819 errx(EX_DATAERR, "username or id required");
820
821 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);
822 if (pwd == NULL) {
823 if (force) {
824 pwd = &fakeuser;
825 } else {
826 if (name == NULL)
827 errx(EX_NOUSER, "no such uid `%ju'",
828 (uintmax_t) id);
829 errx(EX_NOUSER, "no such user `%s'", name);
830 }
831 }
832
833 return (print_user(pwd, pretty, v7));
834 }
835
836 int
pw_user_del(int argc,char ** argv,char * arg1)837 pw_user_del(int argc, char **argv, char *arg1)
838 {
839 struct userconf *cnf = NULL;
840 struct passwd *pwd = NULL;
841 struct group *gr, *grp;
842 char *name = NULL;
843 char grname[MAXLOGNAME];
844 char *nispasswd = NULL;
845 char file[MAXPATHLEN];
846 char home[MAXPATHLEN];
847 const char *cfg = NULL;
848 struct stat st;
849 intmax_t id = -1;
850 int ch, rc;
851 bool nis = false;
852 bool deletehome = false;
853 bool quiet = false;
854
855 if (arg1 != NULL) {
856 if (arg1[strspn(arg1, "0123456789")] == '\0')
857 id = pw_checkid(arg1, UID_MAX);
858 else
859 name = arg1;
860 }
861
862 while ((ch = getopt(argc, argv, "C:qn:u:rYy:")) != -1) {
863 switch (ch) {
864 case 'C':
865 cfg = optarg;
866 break;
867 case 'q':
868 quiet = true;
869 break;
870 case 'n':
871 name = optarg;
872 break;
873 case 'u':
874 id = pw_checkid(optarg, UID_MAX);
875 break;
876 case 'r':
877 deletehome = true;
878 break;
879 case 'y':
880 nispasswd = optarg;
881 break;
882 case 'Y':
883 nis = true;
884 break;
885 default:
886 usage();
887 }
888 }
889 argc -= optind;
890 argv += optind;
891 if (argc > 0)
892 usage();
893
894 if (quiet)
895 freopen(_PATH_DEVNULL, "w", stderr);
896
897 if (id < 0 && name == NULL)
898 errx(EX_DATAERR, "username or id required");
899
900 cnf = get_userconfig(cfg);
901
902 if (nispasswd == NULL)
903 nispasswd = cnf->nispasswd;
904
905 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);
906 if (pwd == NULL) {
907 if (name == NULL)
908 errx(EX_NOUSER, "no such uid `%ju'", (uintmax_t) id);
909 errx(EX_NOUSER, "no such user `%s'", name);
910 }
911
912 if (PWF._altdir == PWF_REGULAR &&
913 ((pwd->pw_fields & _PWF_SOURCE) != _PWF_FILES)) {
914 if ((pwd->pw_fields & _PWF_SOURCE) == _PWF_NIS) {
915 if (!nis && nispasswd && *nispasswd != '/')
916 errx(EX_NOUSER, "Cannot remove NIS user `%s'",
917 name);
918 } else {
919 errx(EX_NOUSER, "Cannot remove non local user `%s'",
920 name);
921 }
922 }
923
924 id = pwd->pw_uid;
925 if (name == NULL)
926 name = pwd->pw_name;
927
928 if (strcmp(pwd->pw_name, "root") == 0)
929 errx(EX_DATAERR, "cannot remove user 'root'");
930
931 if (!PWALTDIR()) {
932 /* Remove crontabs */
933 snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name);
934 if (access(file, F_OK) == 0) {
935 const char *argv[] = {
936 "crontab",
937 "-u",
938 pwd->pw_name,
939 "-r",
940 NULL
941 };
942 pid_t pid;
943
944 if (posix_spawnp(&pid, argv[0], NULL, NULL,
945 (char *const *) argv, environ)) {
946 warn("Failed to execute '%s %s'",
947 argv[0], argv[1]);
948 } else
949 (void) waitpid(pid, NULL, 0);
950 }
951 }
952
953 /*
954 * Save these for later, since contents of pwd may be
955 * invalidated by deletion
956 */
957 snprintf(file, sizeof(file), "%s/%s", _PATH_MAILDIR, pwd->pw_name);
958 strlcpy(home, pwd->pw_dir, sizeof(home));
959 gr = GETGRGID(pwd->pw_gid);
960 if (gr != NULL)
961 strlcpy(grname, gr->gr_name, LOGNAMESIZE);
962 else
963 grname[0] = '\0';
964
965 rc = delpwent(pwd);
966 if (rc == -1)
967 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
968 else if (rc != 0)
969 err(EX_IOERR, "passwd update");
970
971 if (nis && nispasswd && *nispasswd=='/') {
972 rc = delnispwent(nispasswd, name);
973 if (rc == -1)
974 warnx("WARNING: user '%s' does not exist in NIS passwd",
975 pwd->pw_name);
976 else if (rc != 0)
977 warn("WARNING: NIS passwd update");
978 }
979
980 grp = GETGRNAM(name);
981 if (grp != NULL &&
982 (grp->gr_mem == NULL || *grp->gr_mem == NULL) &&
983 strcmp(name, grname) == 0)
984 delgrent(GETGRNAM(name));
985 SETGRENT();
986 while ((grp = GETGRENT()) != NULL) {
987 int i, j;
988 char group[MAXLOGNAME];
989 if (grp->gr_mem == NULL)
990 continue;
991
992 for (i = 0; grp->gr_mem[i] != NULL; i++) {
993 if (strcmp(grp->gr_mem[i], name) != 0)
994 continue;
995
996 for (j = i; grp->gr_mem[j] != NULL; j++)
997 grp->gr_mem[j] = grp->gr_mem[j+1];
998 strlcpy(group, grp->gr_name, MAXLOGNAME);
999 chggrent(group, grp);
1000 }
1001 }
1002 ENDGRENT();
1003
1004 pw_log(cnf, M_DELETE, W_USER, "%s(%ju) account removed", name,
1005 (uintmax_t)id);
1006
1007 /* Remove mail file */
1008 if (PWALTDIR() != PWF_ALT)
1009 unlinkat(conf.rootfd, file + 1, 0);
1010
1011 /* Remove at jobs */
1012 if (!PWALTDIR() && getpwuid(id) == NULL)
1013 rmat(id);
1014
1015 /* Remove home directory and contents */
1016 if (PWALTDIR() != PWF_ALT && deletehome && *home == '/' &&
1017 GETPWUID(id) == NULL &&
1018 fstatat(conf.rootfd, home + 1, &st, 0) != -1) {
1019 rm_r(conf.rootfd, home, id);
1020 pw_log(cnf, M_DELETE, W_USER, "%s(%ju) home '%s' %s"
1021 "removed", name, (uintmax_t)id, home,
1022 fstatat(conf.rootfd, home + 1, &st, 0) == -1 ? "" : "not "
1023 "completely ");
1024 }
1025
1026 return (EXIT_SUCCESS);
1027 }
1028
1029 int
pw_user_lock(int argc,char ** argv,char * arg1)1030 pw_user_lock(int argc, char **argv, char *arg1)
1031 {
1032 int ch;
1033
1034 while ((ch = getopt(argc, argv, "Cq")) != -1) {
1035 switch (ch) {
1036 case 'C':
1037 case 'q':
1038 /* compatibility */
1039 break;
1040 default:
1041 usage();
1042 }
1043 }
1044 argc -= optind;
1045 argv += optind;
1046 if (argc > 0)
1047 usage();
1048
1049 return (pw_userlock(arg1, M_LOCK));
1050 }
1051
1052 int
pw_user_unlock(int argc,char ** argv,char * arg1)1053 pw_user_unlock(int argc, char **argv, char *arg1)
1054 {
1055 int ch;
1056
1057 while ((ch = getopt(argc, argv, "Cq")) != -1) {
1058 switch (ch) {
1059 case 'C':
1060 case 'q':
1061 /* compatibility */
1062 break;
1063 default:
1064 usage();
1065 }
1066 }
1067 argc -= optind;
1068 argv += optind;
1069 if (argc > 0)
1070 usage();
1071
1072 return (pw_userlock(arg1, M_UNLOCK));
1073 }
1074
1075 static struct group *
group_from_name_or_id(char * name)1076 group_from_name_or_id(char *name)
1077 {
1078 const char *errstr = NULL;
1079 struct group *grp;
1080 uintmax_t id;
1081
1082 if ((grp = GETGRNAM(name)) == NULL) {
1083 id = strtounum(name, 0, GID_MAX, &errstr);
1084 if (errstr)
1085 errx(EX_NOUSER, "group `%s' does not exist", name);
1086 grp = GETGRGID(id);
1087 if (grp == NULL)
1088 errx(EX_NOUSER, "group `%s' does not exist", name);
1089 }
1090
1091 return (grp);
1092 }
1093
1094 static void
split_groups(StringList ** groups,char * groupsstr)1095 split_groups(StringList **groups, char *groupsstr)
1096 {
1097 struct group *grp;
1098 char *p;
1099 char tok[] = ", \t";
1100
1101 if (*groups == NULL)
1102 *groups = sl_init();
1103 for (p = strtok(groupsstr, tok); p != NULL; p = strtok(NULL, tok)) {
1104 grp = group_from_name_or_id(p);
1105 sl_add(*groups, newstr(grp->gr_name));
1106 }
1107 }
1108
1109 static void
validate_grname(struct userconf * cnf,char * group)1110 validate_grname(struct userconf *cnf, char *group)
1111 {
1112 struct group *grp;
1113
1114 if (group == NULL || *group == '\0') {
1115 cnf->default_group = "";
1116 return;
1117 }
1118 grp = group_from_name_or_id(group);
1119 cnf->default_group = newstr(grp->gr_name);
1120 }
1121
1122 static mode_t
validate_mode(char * mode)1123 validate_mode(char *mode)
1124 {
1125 mode_t m;
1126 void *set;
1127
1128 if ((set = setmode(mode)) == NULL)
1129 errx(EX_DATAERR, "invalid directory creation mode '%s'", mode);
1130
1131 m = getmode(set, _DEF_DIRMODE);
1132 free(set);
1133 return (m);
1134 }
1135
1136 static long
validate_expire(char * str,int opt)1137 validate_expire(char *str, int opt)
1138 {
1139 if (!numerics(str))
1140 errx(EX_DATAERR, "-%c argument must be numeric "
1141 "when setting defaults: %s", (char)opt, str);
1142 return strtol(str, NULL, 0);
1143 }
1144
1145 static void
mix_config(struct userconf * cmdcnf,struct userconf * cfg)1146 mix_config(struct userconf *cmdcnf, struct userconf *cfg)
1147 {
1148
1149 if (cmdcnf->default_password < 0)
1150 cmdcnf->default_password = cfg->default_password;
1151 if (cmdcnf->reuse_uids == 0)
1152 cmdcnf->reuse_uids = cfg->reuse_uids;
1153 if (cmdcnf->reuse_gids == 0)
1154 cmdcnf->reuse_gids = cfg->reuse_gids;
1155 if (cmdcnf->nispasswd == NULL)
1156 cmdcnf->nispasswd = cfg->nispasswd;
1157 if (cmdcnf->dotdir == NULL)
1158 cmdcnf->dotdir = cfg->dotdir;
1159 if (cmdcnf->newmail == NULL)
1160 cmdcnf->newmail = cfg->newmail;
1161 if (cmdcnf->logfile == NULL)
1162 cmdcnf->logfile = cfg->logfile;
1163 if (cmdcnf->home == NULL)
1164 cmdcnf->home = cfg->home;
1165 if (cmdcnf->homemode == 0)
1166 cmdcnf->homemode = cfg->homemode;
1167 if (cmdcnf->shelldir == NULL)
1168 cmdcnf->shelldir = cfg->shelldir;
1169 if (cmdcnf->shells == NULL)
1170 cmdcnf->shells = cfg->shells;
1171 if (cmdcnf->shell_default == NULL)
1172 cmdcnf->shell_default = cfg->shell_default;
1173 if (cmdcnf->default_group == NULL)
1174 cmdcnf->default_group = cfg->default_group;
1175 if (cmdcnf->groups == NULL)
1176 cmdcnf->groups = cfg->groups;
1177 if (cmdcnf->default_class == NULL)
1178 cmdcnf->default_class = cfg->default_class;
1179 if (cmdcnf->min_uid == 0)
1180 cmdcnf->min_uid = cfg->min_uid;
1181 if (cmdcnf->max_uid == 0)
1182 cmdcnf->max_uid = cfg->max_uid;
1183 if (cmdcnf->min_gid == 0)
1184 cmdcnf->min_gid = cfg->min_gid;
1185 if (cmdcnf->max_gid == 0)
1186 cmdcnf->max_gid = cfg->max_gid;
1187 if (cmdcnf->expire_days < 0)
1188 cmdcnf->expire_days = cfg->expire_days;
1189 if (cmdcnf->password_days < 0)
1190 cmdcnf->password_days = cfg->password_days;
1191 }
1192
1193 int
pw_user_add(int argc,char ** argv,char * arg1)1194 pw_user_add(int argc, char **argv, char *arg1)
1195 {
1196 struct userconf *cnf, *cmdcnf;
1197 struct passwd *pwd;
1198 struct group *grp;
1199 struct stat st;
1200 char args[] = "C:qn:u:c:d:e:p:g:G:mM:k:s:oL:i:w:h:H:Db:NPy:Y";
1201 char line[_PASSWORD_LEN+1], path[MAXPATHLEN];
1202 char *gecos, *homedir, *skel, *walk, *userid, *groupid, *grname;
1203 char *default_passwd, *name, *p;
1204 const char *cfg = NULL;
1205 login_cap_t *lc;
1206 FILE *pfp, *fp;
1207 intmax_t id = -1;
1208 time_t now;
1209 int rc, ch, fd = -1;
1210 size_t i;
1211 bool dryrun, nis, pretty, quiet, createhome, precrypted, genconf;
1212
1213 dryrun = nis = pretty = quiet = createhome = precrypted = false;
1214 genconf = false;
1215 gecos = homedir = skel = userid = groupid = default_passwd = NULL;
1216 grname = name = NULL;
1217
1218 if ((cmdcnf = calloc(1, sizeof(struct userconf))) == NULL)
1219 err(EXIT_FAILURE, "calloc()");
1220
1221 cmdcnf->default_password = cmdcnf->expire_days = cmdcnf->password_days = -1;
1222 now = time(NULL);
1223
1224 if (arg1 != NULL) {
1225 if (arg1[strspn(arg1, "0123456789")] == '\0')
1226 id = pw_checkid(arg1, UID_MAX);
1227 else
1228 name = pw_checkname(arg1, 0);
1229 }
1230
1231 while ((ch = getopt(argc, argv, args)) != -1) {
1232 switch (ch) {
1233 case 'C':
1234 cfg = optarg;
1235 break;
1236 case 'q':
1237 quiet = true;
1238 break;
1239 case 'n':
1240 name = pw_checkname(optarg, 0);
1241 break;
1242 case 'u':
1243 userid = optarg;
1244 break;
1245 case 'c':
1246 gecos = pw_checkname(optarg, 1);
1247 break;
1248 case 'd':
1249 homedir = optarg;
1250 break;
1251 case 'e':
1252 if (genconf)
1253 cmdcnf->expire_days = validate_expire(optarg, ch);
1254 else
1255 cmdcnf->expire_days = parse_date(now, optarg);
1256 break;
1257 case 'p':
1258 if (genconf)
1259 cmdcnf->password_days = validate_expire(optarg, ch);
1260 else
1261 cmdcnf->password_days = parse_date(now, optarg);
1262 break;
1263 case 'g':
1264 validate_grname(cmdcnf, optarg);
1265 grname = optarg;
1266 break;
1267 case 'G':
1268 split_groups(&cmdcnf->groups, optarg);
1269 break;
1270 case 'm':
1271 createhome = true;
1272 break;
1273 case 'M':
1274 cmdcnf->homemode = validate_mode(optarg);
1275 break;
1276 case 'k':
1277 walk = skel = optarg;
1278 if (*walk == '/')
1279 walk++;
1280 if (fstatat(conf.rootfd, walk, &st, 0) == -1)
1281 errx(EX_OSFILE, "skeleton `%s' does not "
1282 "exists", skel);
1283 if (!S_ISDIR(st.st_mode))
1284 errx(EX_OSFILE, "skeleton `%s' is not a "
1285 "directory", skel);
1286 cmdcnf->dotdir = skel;
1287 break;
1288 case 's':
1289 cmdcnf->shell_default = optarg;
1290 break;
1291 case 'o':
1292 conf.checkduplicate = false;
1293 break;
1294 case 'L':
1295 cmdcnf->default_class = pw_checkname(optarg, 0);
1296 break;
1297 case 'i':
1298 groupid = optarg;
1299 break;
1300 case 'w':
1301 default_passwd = optarg;
1302 break;
1303 case 'H':
1304 if (fd != -1)
1305 errx(EX_USAGE, "'-h' and '-H' are mutually "
1306 "exclusive options");
1307 fd = pw_checkfd(optarg);
1308 precrypted = true;
1309 if (fd == '-')
1310 errx(EX_USAGE, "-H expects a file descriptor");
1311 break;
1312 case 'h':
1313 if (fd != -1)
1314 errx(EX_USAGE, "'-h' and '-H' are mutually "
1315 "exclusive options");
1316 fd = pw_checkfd(optarg);
1317 break;
1318 case 'D':
1319 genconf = true;
1320 break;
1321 case 'b':
1322 cmdcnf->home = optarg;
1323 break;
1324 case 'N':
1325 dryrun = true;
1326 break;
1327 case 'P':
1328 pretty = true;
1329 break;
1330 case 'y':
1331 cmdcnf->nispasswd = optarg;
1332 break;
1333 case 'Y':
1334 nis = true;
1335 break;
1336 default:
1337 usage();
1338 }
1339 }
1340 argc -= optind;
1341 argv += optind;
1342 if (argc > 0)
1343 usage();
1344
1345 if (!dryrun)
1346 pw_check_root();
1347
1348 if (quiet)
1349 freopen(_PATH_DEVNULL, "w", stderr);
1350
1351 cnf = get_userconfig(cfg);
1352
1353 mix_config(cmdcnf, cnf);
1354 if (default_passwd)
1355 cmdcnf->default_password = passwd_val(default_passwd,
1356 cnf->default_password);
1357 if (genconf) {
1358 if (name != NULL)
1359 errx(EX_DATAERR, "can't combine `-D' with `-n name'");
1360 if (userid != NULL) {
1361 if ((p = strtok(userid, ", \t")) != NULL)
1362 cmdcnf->min_uid = pw_checkid(p, UID_MAX);
1363 if (cmdcnf->min_uid == 0)
1364 cmdcnf->min_uid = 1000;
1365 if ((p = strtok(NULL, " ,\t")) != NULL)
1366 cmdcnf->max_uid = pw_checkid(p, UID_MAX);
1367 if (cmdcnf->max_uid == 0)
1368 cmdcnf->max_uid = 32000;
1369 }
1370 if (groupid != NULL) {
1371 if ((p = strtok(groupid, ", \t")) != NULL)
1372 cmdcnf->min_gid = pw_checkid(p, GID_MAX);
1373 if (cmdcnf->min_gid == 0)
1374 cmdcnf->min_gid = 1000;
1375 if ((p = strtok(NULL, " ,\t")) != NULL)
1376 cmdcnf->max_gid = pw_checkid(p, GID_MAX);
1377 if (cmdcnf->max_gid == 0)
1378 cmdcnf->max_gid = 32000;
1379 }
1380 if (write_userconfig(cmdcnf, cfg))
1381 return (EXIT_SUCCESS);
1382 err(EX_IOERR, "config update");
1383 }
1384
1385 if (userid)
1386 id = pw_checkid(userid, UID_MAX);
1387 if (id < 0 && name == NULL)
1388 errx(EX_DATAERR, "user name or id required");
1389
1390 if (name == NULL)
1391 errx(EX_DATAERR, "login name required");
1392
1393 if (GETPWNAM(name) != NULL)
1394 errx(EX_DATAERR, "login name `%s' already exists", name);
1395
1396 if (!grname)
1397 grname = cmdcnf->default_group;
1398
1399 pwd = &fakeuser;
1400 pwd->pw_name = name;
1401 pwd->pw_class = cmdcnf->default_class ? cmdcnf->default_class : "";
1402 pwd->pw_uid = pw_uidpolicy(cmdcnf, id);
1403 pwd->pw_gid = pw_gidpolicy(cnf, grname, pwd->pw_name,
1404 (gid_t) pwd->pw_uid, dryrun);
1405
1406 /* cmdcnf->password_days and cmdcnf->expire_days hold unixtime here */
1407 if (cmdcnf->password_days > 0)
1408 pwd->pw_change = cmdcnf->password_days;
1409 if (cmdcnf->expire_days > 0)
1410 pwd->pw_expire = cmdcnf->expire_days;
1411
1412 pwd->pw_dir = pw_homepolicy(cmdcnf, homedir, pwd->pw_name);
1413 pwd->pw_shell = pw_shellpolicy(cmdcnf);
1414 lc = login_getpwclass(pwd);
1415 if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL)
1416 warn("setting crypt(3) format");
1417 login_close(lc);
1418 pwd->pw_passwd = pw_password(cmdcnf, pwd->pw_name);
1419 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
1420 warnx("WARNING: new account `%s' has a uid of 0 "
1421 "(superuser access!)", pwd->pw_name);
1422 if (gecos)
1423 pwd->pw_gecos = gecos;
1424
1425 if (fd != -1)
1426 pw_set_passwd(pwd, fd, precrypted, false);
1427
1428 if (dryrun)
1429 return (print_user(pwd, pretty, false));
1430
1431 if ((rc = addpwent(pwd)) != 0) {
1432 if (rc == -1)
1433 errx(EX_IOERR, "user '%s' already exists",
1434 pwd->pw_name);
1435 else if (rc != 0)
1436 err(EX_IOERR, "passwd file update");
1437 }
1438 if (nis && cmdcnf->nispasswd && *cmdcnf->nispasswd == '/') {
1439 printf("%s\n", cmdcnf->nispasswd);
1440 rc = addnispwent(cmdcnf->nispasswd, pwd);
1441 if (rc == -1)
1442 warnx("User '%s' already exists in NIS passwd",
1443 pwd->pw_name);
1444 else if (rc != 0)
1445 warn("NIS passwd update");
1446 /* NOTE: we treat NIS-only update errors as non-fatal */
1447 }
1448
1449 if (cmdcnf->groups != NULL) {
1450 for (i = 0; i < cmdcnf->groups->sl_cur; i++) {
1451 grp = GETGRNAM(cmdcnf->groups->sl_str[i]);
1452 /* gr_add doesn't check if new member is already in group */
1453 if (grp_has_member(grp, pwd->pw_name))
1454 continue;
1455 grp = gr_add(grp, pwd->pw_name);
1456 /*
1457 * grp can only be NULL in 2 cases:
1458 * - the new member is already a member
1459 * - a problem with memory occurs
1460 * in both cases we want to skip now.
1461 */
1462 if (grp == NULL)
1463 continue;
1464 chggrent(grp->gr_name, grp);
1465 free(grp);
1466 }
1467 }
1468
1469 pwd = GETPWNAM(name);
1470 if (pwd == NULL)
1471 errx(EX_NOUSER, "user '%s' disappeared during update", name);
1472
1473 grp = GETGRGID(pwd->pw_gid);
1474 pw_log(cnf, M_ADD, W_USER, "%s(%ju):%s(%ju):%s:%s:%s",
1475 pwd->pw_name, (uintmax_t)pwd->pw_uid,
1476 grp ? grp->gr_name : "unknown",
1477 (uintmax_t)(grp ? grp->gr_gid : (uid_t)-1),
1478 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
1479
1480 /*
1481 * let's touch and chown the user's mail file. This is not
1482 * strictly necessary under BSD with a 0755 maildir but it also
1483 * doesn't hurt anything to create the empty mailfile
1484 */
1485 if (PWALTDIR() != PWF_ALT) {
1486 snprintf(path, sizeof(path), "%s/%s", _PATH_MAILDIR,
1487 pwd->pw_name);
1488 /* Preserve contents & mtime */
1489 close(openat(conf.rootfd, path +1, O_RDWR | O_CREAT, 0600));
1490 fchownat(conf.rootfd, path + 1, pwd->pw_uid, pwd->pw_gid,
1491 AT_SYMLINK_NOFOLLOW);
1492 }
1493
1494 /*
1495 * Let's create and populate the user's home directory. Note
1496 * that this also `works' for editing users if -m is used, but
1497 * existing files will *not* be overwritten.
1498 */
1499 if (PWALTDIR() != PWF_ALT && createhome && pwd->pw_dir &&
1500 *pwd->pw_dir == '/' && pwd->pw_dir[1])
1501 create_and_populate_homedir(cmdcnf, pwd, cmdcnf->dotdir,
1502 cmdcnf->homemode, false);
1503
1504 if (!PWALTDIR() && cmdcnf->newmail && *cmdcnf->newmail &&
1505 (fp = fopen(cnf->newmail, "r")) != NULL) {
1506 if ((pfp = popen(_PATH_SENDMAIL " -t", "w")) == NULL)
1507 warn("sendmail");
1508 else {
1509 fprintf(pfp, "From: root\n" "To: %s\n"
1510 "Subject: Welcome!\n\n", pwd->pw_name);
1511 while (fgets(line, sizeof(line), fp) != NULL) {
1512 /* Do substitutions? */
1513 fputs(line, pfp);
1514 }
1515 pclose(pfp);
1516 pw_log(cnf, M_ADD, W_USER, "%s(%ju) new user mail sent",
1517 pwd->pw_name, (uintmax_t)pwd->pw_uid);
1518 }
1519 fclose(fp);
1520 }
1521
1522 if (nis && nis_update() == 0)
1523 pw_log(cnf, M_ADD, W_USER, "NIS maps updated");
1524
1525 return (EXIT_SUCCESS);
1526 }
1527
1528 int
pw_user_mod(int argc,char ** argv,char * arg1)1529 pw_user_mod(int argc, char **argv, char *arg1)
1530 {
1531 struct userconf *cnf;
1532 struct passwd *pwd;
1533 struct group *grp;
1534 StringList *groups = NULL;
1535 char args[] = "C:qn:u:c:d:e:p:g:G:mM:l:k:s:w:L:h:H:NPYy:";
1536 const char *cfg = NULL;
1537 char *gecos, *homedir, *grname, *name, *newname, *walk, *skel, *shell;
1538 char *passwd, *class, *nispasswd;
1539 login_cap_t *lc;
1540 struct stat st;
1541 intmax_t id = -1;
1542 int ch, fd = -1;
1543 size_t i, j;
1544 bool quiet, createhome, pretty, dryrun, nis, edited;
1545 bool precrypted;
1546 mode_t homemode = 0;
1547 time_t expire_time, password_time, now;
1548
1549 expire_time = password_time = -1;
1550 gecos = homedir = grname = name = newname = skel = shell =NULL;
1551 passwd = NULL;
1552 class = nispasswd = NULL;
1553 quiet = createhome = pretty = dryrun = nis = precrypted = false;
1554 edited = false;
1555 now = time(NULL);
1556
1557 if (arg1 != NULL) {
1558 if (arg1[strspn(arg1, "0123456789")] == '\0')
1559 id = pw_checkid(arg1, UID_MAX);
1560 else
1561 name = arg1;
1562 }
1563
1564 while ((ch = getopt(argc, argv, args)) != -1) {
1565 switch (ch) {
1566 case 'C':
1567 cfg = optarg;
1568 break;
1569 case 'q':
1570 quiet = true;
1571 break;
1572 case 'n':
1573 name = optarg;
1574 break;
1575 case 'u':
1576 id = pw_checkid(optarg, UID_MAX);
1577 break;
1578 case 'c':
1579 gecos = pw_checkname(optarg, 1);
1580 break;
1581 case 'd':
1582 homedir = optarg;
1583 break;
1584 case 'e':
1585 expire_time = parse_date(now, optarg);
1586 break;
1587 case 'p':
1588 password_time = parse_date(now, optarg);
1589 break;
1590 case 'g':
1591 group_from_name_or_id(optarg);
1592 grname = optarg;
1593 break;
1594 case 'G':
1595 split_groups(&groups, optarg);
1596 break;
1597 case 'm':
1598 createhome = true;
1599 break;
1600 case 'M':
1601 homemode = validate_mode(optarg);
1602 break;
1603 case 'l':
1604 newname = optarg;
1605 break;
1606 case 'k':
1607 walk = skel = optarg;
1608 if (*walk == '/')
1609 walk++;
1610 if (fstatat(conf.rootfd, walk, &st, 0) == -1)
1611 errx(EX_OSFILE, "skeleton `%s' does not "
1612 "exists", skel);
1613 if (!S_ISDIR(st.st_mode))
1614 errx(EX_OSFILE, "skeleton `%s' is not a "
1615 "directory", skel);
1616 break;
1617 case 's':
1618 shell = optarg;
1619 break;
1620 case 'w':
1621 passwd = optarg;
1622 break;
1623 case 'L':
1624 class = pw_checkname(optarg, 0);
1625 break;
1626 case 'H':
1627 if (fd != -1)
1628 errx(EX_USAGE, "'-h' and '-H' are mutually "
1629 "exclusive options");
1630 fd = pw_checkfd(optarg);
1631 precrypted = true;
1632 if (fd == '-')
1633 errx(EX_USAGE, "-H expects a file descriptor");
1634 break;
1635 case 'h':
1636 if (fd != -1)
1637 errx(EX_USAGE, "'-h' and '-H' are mutually "
1638 "exclusive options");
1639 fd = pw_checkfd(optarg);
1640 break;
1641 case 'N':
1642 dryrun = true;
1643 break;
1644 case 'P':
1645 pretty = true;
1646 break;
1647 case 'y':
1648 nispasswd = optarg;
1649 break;
1650 case 'Y':
1651 nis = true;
1652 break;
1653 default:
1654 usage();
1655 }
1656 }
1657 argc -= optind;
1658 argv += optind;
1659 if (argc > 0)
1660 usage();
1661
1662 if (!dryrun)
1663 pw_check_root();
1664
1665 if (quiet)
1666 freopen(_PATH_DEVNULL, "w", stderr);
1667
1668 cnf = get_userconfig(cfg);
1669
1670 if (id < 0 && name == NULL)
1671 errx(EX_DATAERR, "username or id required");
1672
1673 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);
1674 if (pwd == NULL) {
1675 if (name == NULL)
1676 errx(EX_NOUSER, "no such uid `%ju'",
1677 (uintmax_t) id);
1678 errx(EX_NOUSER, "no such user `%s'", name);
1679 }
1680
1681 if (name == NULL)
1682 name = pwd->pw_name;
1683
1684 if (nis && nispasswd == NULL)
1685 nispasswd = cnf->nispasswd;
1686
1687 if (PWF._altdir == PWF_REGULAR &&
1688 ((pwd->pw_fields & _PWF_SOURCE) != _PWF_FILES)) {
1689 if ((pwd->pw_fields & _PWF_SOURCE) == _PWF_NIS) {
1690 if (!nis && nispasswd && *nispasswd != '/')
1691 errx(EX_NOUSER, "Cannot modify NIS user `%s'",
1692 name);
1693 } else {
1694 errx(EX_NOUSER, "Cannot modify non local user `%s'",
1695 name);
1696 }
1697 }
1698
1699 if (newname) {
1700 if (strcmp(pwd->pw_name, "root") == 0)
1701 errx(EX_DATAERR, "can't rename `root' account");
1702 if (strcmp(pwd->pw_name, newname) != 0) {
1703 pwd->pw_name = pw_checkname(newname, 0);
1704 edited = true;
1705 }
1706 }
1707
1708 if (id >= 0 && pwd->pw_uid != id) {
1709 pwd->pw_uid = id;
1710 edited = true;
1711 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
1712 errx(EX_DATAERR, "can't change uid of `root' account");
1713 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
1714 warnx("WARNING: account `%s' will have a uid of 0 "
1715 "(superuser access!)", pwd->pw_name);
1716 }
1717
1718 if (grname && pwd->pw_uid != 0) {
1719 grp = GETGRNAM(grname);
1720 if (grp == NULL)
1721 grp = GETGRGID(pw_checkid(grname, GID_MAX));
1722 if (grp->gr_gid != pwd->pw_gid) {
1723 pwd->pw_gid = grp->gr_gid;
1724 edited = true;
1725 }
1726 }
1727
1728
1729 if (password_time >= 0 && pwd->pw_change != password_time) {
1730 pwd->pw_change = password_time;
1731 edited = true;
1732 }
1733
1734 if (expire_time >= 0 && pwd->pw_expire != expire_time) {
1735 pwd->pw_expire = expire_time;
1736 edited = true;
1737 }
1738
1739 if (shell) {
1740 shell = shell_path(cnf->shelldir, cnf->shells, shell);
1741 if (shell == NULL)
1742 shell = "";
1743 if (strcmp(shell, pwd->pw_shell) != 0) {
1744 pwd->pw_shell = shell;
1745 edited = true;
1746 }
1747 }
1748
1749 if (class && strcmp(pwd->pw_class, class) != 0) {
1750 pwd->pw_class = class;
1751 edited = true;
1752 }
1753
1754 if (homedir && strcmp(pwd->pw_dir, homedir) != 0) {
1755 pwd->pw_dir = homedir;
1756 edited = true;
1757 if (fstatat(conf.rootfd, pwd->pw_dir, &st, 0) == -1) {
1758 if (!createhome)
1759 warnx("WARNING: home `%s' does not exist",
1760 pwd->pw_dir);
1761 } else if (!S_ISDIR(st.st_mode)) {
1762 warnx("WARNING: home `%s' is not a directory",
1763 pwd->pw_dir);
1764 }
1765 }
1766
1767 if (passwd && conf.fd == -1) {
1768 lc = login_getpwclass(pwd);
1769 if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL)
1770 warn("setting crypt(3) format");
1771 login_close(lc);
1772 cnf->default_password = passwd_val(passwd,
1773 cnf->default_password);
1774 pwd->pw_passwd = pw_password(cnf, pwd->pw_name);
1775 edited = true;
1776 }
1777
1778 if (gecos && strcmp(pwd->pw_gecos, gecos) != 0) {
1779 pwd->pw_gecos = gecos;
1780 edited = true;
1781 }
1782
1783 if (fd != -1)
1784 edited = pw_set_passwd(pwd, fd, precrypted, true);
1785
1786 if (dryrun)
1787 return (print_user(pwd, pretty, false));
1788
1789 if (edited) /* Only updated this if required */
1790 perform_chgpwent(name, pwd, nis ? nispasswd : NULL);
1791 /* Now perform the needed changes concern groups */
1792 if (groups != NULL) {
1793 /* Delete User from groups using old name */
1794 SETGRENT();
1795 while ((grp = GETGRENT()) != NULL) {
1796 if (grp->gr_mem == NULL)
1797 continue;
1798 for (i = 0; grp->gr_mem[i] != NULL; i++) {
1799 if (strcmp(grp->gr_mem[i] , name) != 0)
1800 continue;
1801 for (j = i; grp->gr_mem[j] != NULL ; j++)
1802 grp->gr_mem[j] = grp->gr_mem[j+1];
1803 chggrent(grp->gr_name, grp);
1804 break;
1805 }
1806 }
1807 ENDGRENT();
1808 /* Add the user to the needed groups */
1809 for (i = 0; i < groups->sl_cur; i++) {
1810 grp = GETGRNAM(groups->sl_str[i]);
1811 grp = gr_add(grp, pwd->pw_name);
1812 if (grp == NULL)
1813 continue;
1814 chggrent(grp->gr_name, grp);
1815 free(grp);
1816 }
1817 }
1818 /* In case of rename we need to walk over the different groups */
1819 if (newname) {
1820 SETGRENT();
1821 while ((grp = GETGRENT()) != NULL) {
1822 if (grp->gr_mem == NULL)
1823 continue;
1824 for (i = 0; grp->gr_mem[i] != NULL; i++) {
1825 if (strcmp(grp->gr_mem[i], name) != 0)
1826 continue;
1827 grp->gr_mem[i] = newname;
1828 chggrent(grp->gr_name, grp);
1829 break;
1830 }
1831 }
1832 }
1833
1834 /* go get a current version of pwd */
1835 if (newname)
1836 name = newname;
1837 pwd = GETPWNAM(name);
1838 if (pwd == NULL)
1839 errx(EX_NOUSER, "user '%s' disappeared during update", name);
1840 grp = GETGRGID(pwd->pw_gid);
1841 pw_log(cnf, M_MODIFY, W_USER, "%s(%ju):%s(%ju):%s:%s:%s",
1842 pwd->pw_name, (uintmax_t)pwd->pw_uid,
1843 grp ? grp->gr_name : "unknown",
1844 (uintmax_t)(grp ? grp->gr_gid : (uid_t)-1),
1845 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
1846
1847 /*
1848 * Let's create and populate the user's home directory. Note
1849 * that this also `works' for editing users if -m is used, but
1850 * existing files will *not* be overwritten.
1851 */
1852 if (PWALTDIR() != PWF_ALT && createhome && pwd->pw_dir &&
1853 *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
1854 if (!skel)
1855 skel = cnf->dotdir;
1856 if (homemode == 0)
1857 homemode = cnf->homemode;
1858 create_and_populate_homedir(cnf, pwd, skel, homemode, true);
1859 }
1860
1861 if (nis && nis_update() == 0)
1862 pw_log(cnf, M_MODIFY, W_USER, "NIS maps updated");
1863
1864 return (EXIT_SUCCESS);
1865 }
1866