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