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/types.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_UPDATE : 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; 672 673 if (strncmp(e->d_name, ".lock", 5) != 0 && 674 stat(e->d_name, &st) == 0 && 675 !S_ISDIR(st.st_mode) && 676 st.st_uid == uid) { 677 const char *argv[] = { 678 "/usr/sbin/atrm", 679 e->d_name, 680 NULL 681 }; 682 if (posix_spawn(NULL, argv[0], NULL, NULL, 683 (char *const *) argv, environ)) { 684 warn("Failed to execute '%s %s'", 685 argv[0], argv[1]); 686 } 687 } 688 } 689 closedir(d); 690 } 691 } 692 693 int 694 pw_user_next(int argc, char **argv, char *name __unused) 695 { 696 struct userconf *cnf = NULL; 697 const char *cfg = NULL; 698 int ch; 699 bool quiet = false; 700 uid_t next; 701 702 while ((ch = getopt(argc, argv, "C:q")) != -1) { 703 switch (ch) { 704 case 'C': 705 cfg = optarg; 706 break; 707 case 'q': 708 quiet = true; 709 break; 710 default: 711 exit(EX_USAGE); 712 } 713 } 714 715 if (quiet) 716 freopen(_PATH_DEVNULL, "w", stderr); 717 718 cnf = get_userconfig(cfg); 719 720 next = pw_uidpolicy(cnf, -1); 721 722 printf("%ju:", (uintmax_t)next); 723 pw_groupnext(cnf, quiet); 724 725 return (EXIT_SUCCESS); 726 } 727 728 int 729 pw_user_show(int argc, char **argv, char *arg1) 730 { 731 struct passwd *pwd = NULL; 732 char *name = NULL; 733 intmax_t id = -1; 734 int ch; 735 bool all = false; 736 bool pretty = false; 737 bool force = false; 738 bool v7 = false; 739 bool quiet = false; 740 741 if (arg1 != NULL) { 742 if (arg1[strspn(arg1, "0123456789")] == '\0') 743 id = pw_checkid(arg1, UID_MAX); 744 else 745 name = arg1; 746 } 747 748 while ((ch = getopt(argc, argv, "C:qn:u:FPa7")) != -1) { 749 switch (ch) { 750 case 'C': 751 /* ignore compatibility */ 752 break; 753 case 'q': 754 quiet = true; 755 break; 756 case 'n': 757 name = optarg; 758 break; 759 case 'u': 760 id = pw_checkid(optarg, UID_MAX); 761 break; 762 case 'F': 763 force = true; 764 break; 765 case 'P': 766 pretty = true; 767 break; 768 case 'a': 769 all = true; 770 break; 771 case '7': 772 v7 = true; 773 break; 774 default: 775 exit(EX_USAGE); 776 } 777 } 778 779 if (quiet) 780 freopen(_PATH_DEVNULL, "w", stderr); 781 782 if (all) { 783 SETPWENT(); 784 while ((pwd = GETPWENT()) != NULL) 785 print_user(pwd, pretty, v7); 786 ENDPWENT(); 787 return (EXIT_SUCCESS); 788 } 789 790 if (id < 0 && name == NULL) 791 errx(EX_DATAERR, "username or id required"); 792 793 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id); 794 if (pwd == NULL) { 795 if (force) { 796 pwd = &fakeuser; 797 } else { 798 if (name == NULL) 799 errx(EX_NOUSER, "no such uid `%ju'", 800 (uintmax_t) id); 801 errx(EX_NOUSER, "no such user `%s'", name); 802 } 803 } 804 805 return (print_user(pwd, pretty, v7)); 806 } 807 808 int 809 pw_user_del(int argc, char **argv, char *arg1) 810 { 811 struct userconf *cnf = NULL; 812 struct passwd *pwd = NULL; 813 struct group *gr, *grp; 814 char *name = NULL; 815 char grname[MAXLOGNAME]; 816 char *nispasswd = NULL; 817 char file[MAXPATHLEN]; 818 char home[MAXPATHLEN]; 819 const char *cfg = NULL; 820 struct stat st; 821 intmax_t id = -1; 822 int ch, rc; 823 bool nis = false; 824 bool deletehome = false; 825 bool quiet = false; 826 827 if (arg1 != NULL) { 828 if (arg1[strspn(arg1, "0123456789")] == '\0') 829 id = pw_checkid(arg1, UID_MAX); 830 else 831 name = arg1; 832 } 833 834 while ((ch = getopt(argc, argv, "C:qn:u:rYy:")) != -1) { 835 switch (ch) { 836 case 'C': 837 cfg = optarg; 838 break; 839 case 'q': 840 quiet = true; 841 break; 842 case 'n': 843 name = optarg; 844 break; 845 case 'u': 846 id = pw_checkid(optarg, UID_MAX); 847 break; 848 case 'r': 849 deletehome = true; 850 break; 851 case 'y': 852 nispasswd = optarg; 853 break; 854 case 'Y': 855 nis = true; 856 break; 857 default: 858 exit(EX_USAGE); 859 } 860 } 861 862 if (quiet) 863 freopen(_PATH_DEVNULL, "w", stderr); 864 865 if (id < 0 && name == NULL) 866 errx(EX_DATAERR, "username or id required"); 867 868 cnf = get_userconfig(cfg); 869 870 if (nispasswd == NULL) 871 nispasswd = cnf->nispasswd; 872 873 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id); 874 if (pwd == NULL) { 875 if (name == NULL) 876 errx(EX_NOUSER, "no such uid `%ju'", (uintmax_t) id); 877 errx(EX_NOUSER, "no such user `%s'", name); 878 } 879 880 if (PWF._altdir == PWF_REGULAR && 881 ((pwd->pw_fields & _PWF_SOURCE) != _PWF_FILES)) { 882 if ((pwd->pw_fields & _PWF_SOURCE) == _PWF_NIS) { 883 if (!nis && nispasswd && *nispasswd != '/') 884 errx(EX_NOUSER, "Cannot remove NIS user `%s'", 885 name); 886 } else { 887 errx(EX_NOUSER, "Cannot remove non local user `%s'", 888 name); 889 } 890 } 891 892 id = pwd->pw_uid; 893 if (name == NULL) 894 name = pwd->pw_name; 895 896 if (strcmp(pwd->pw_name, "root") == 0) 897 errx(EX_DATAERR, "cannot remove user 'root'"); 898 899 if (!PWALTDIR()) { 900 /* Remove crontabs */ 901 snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name); 902 if (access(file, F_OK) == 0) { 903 const char *argv[] = { 904 "crontab", 905 "-u", 906 pwd->pw_name, 907 "-r", 908 NULL 909 }; 910 if (posix_spawnp(NULL, argv[0], NULL, NULL, 911 (char *const *) argv, environ)) { 912 warn("Failed to execute '%s %s'", 913 argv[0], argv[1]); 914 } 915 } 916 } 917 918 /* 919 * Save these for later, since contents of pwd may be 920 * invalidated by deletion 921 */ 922 snprintf(file, sizeof(file), "%s/%s", _PATH_MAILDIR, pwd->pw_name); 923 strlcpy(home, pwd->pw_dir, sizeof(home)); 924 gr = GETGRGID(pwd->pw_gid); 925 if (gr != NULL) 926 strlcpy(grname, gr->gr_name, LOGNAMESIZE); 927 else 928 grname[0] = '\0'; 929 930 rc = delpwent(pwd); 931 if (rc == -1) 932 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name); 933 else if (rc != 0) 934 err(EX_IOERR, "passwd update"); 935 936 if (nis && nispasswd && *nispasswd=='/') { 937 rc = delnispwent(nispasswd, name); 938 if (rc == -1) 939 warnx("WARNING: user '%s' does not exist in NIS passwd", 940 pwd->pw_name); 941 else if (rc != 0) 942 warn("WARNING: NIS passwd update"); 943 } 944 945 grp = GETGRNAM(name); 946 if (grp != NULL && 947 (grp->gr_mem == NULL || *grp->gr_mem == NULL) && 948 strcmp(name, grname) == 0) 949 delgrent(GETGRNAM(name)); 950 SETGRENT(); 951 while ((grp = GETGRENT()) != NULL) { 952 int i, j; 953 char group[MAXLOGNAME]; 954 if (grp->gr_mem == NULL) 955 continue; 956 957 for (i = 0; grp->gr_mem[i] != NULL; i++) { 958 if (strcmp(grp->gr_mem[i], name) != 0) 959 continue; 960 961 for (j = i; grp->gr_mem[j] != NULL; j++) 962 grp->gr_mem[j] = grp->gr_mem[j+1]; 963 strlcpy(group, grp->gr_name, MAXLOGNAME); 964 chggrent(group, grp); 965 } 966 } 967 ENDGRENT(); 968 969 pw_log(cnf, M_DELETE, W_USER, "%s(%ju) account removed", name, 970 (uintmax_t)id); 971 972 /* Remove mail file */ 973 if (PWALTDIR() != PWF_ALT) 974 unlinkat(conf.rootfd, file + 1, 0); 975 976 /* Remove at jobs */ 977 if (!PWALTDIR() && getpwuid(id) == NULL) 978 rmat(id); 979 980 /* Remove home directory and contents */ 981 if (PWALTDIR() != PWF_ALT && deletehome && *home == '/' && 982 GETPWUID(id) == NULL && 983 fstatat(conf.rootfd, home + 1, &st, 0) != -1) { 984 rm_r(conf.rootfd, home, id); 985 pw_log(cnf, M_DELETE, W_USER, "%s(%ju) home '%s' %s" 986 "removed", name, (uintmax_t)id, home, 987 fstatat(conf.rootfd, home + 1, &st, 0) == -1 ? "" : "not " 988 "completely "); 989 } 990 991 return (EXIT_SUCCESS); 992 } 993 994 int 995 pw_user_lock(int argc, char **argv, char *arg1) 996 { 997 int ch; 998 999 while ((ch = getopt(argc, argv, "Cq")) != -1) { 1000 switch (ch) { 1001 case 'C': 1002 case 'q': 1003 /* compatibility */ 1004 break; 1005 default: 1006 exit(EX_USAGE); 1007 } 1008 } 1009 1010 return (pw_userlock(arg1, M_LOCK)); 1011 } 1012 1013 int 1014 pw_user_unlock(int argc, char **argv, char *arg1) 1015 { 1016 int ch; 1017 1018 while ((ch = getopt(argc, argv, "Cq")) != -1) { 1019 switch (ch) { 1020 case 'C': 1021 case 'q': 1022 /* compatibility */ 1023 break; 1024 default: 1025 exit(EX_USAGE); 1026 } 1027 } 1028 1029 return (pw_userlock(arg1, M_UNLOCK)); 1030 } 1031 1032 static struct group * 1033 group_from_name_or_id(char *name) 1034 { 1035 const char *errstr = NULL; 1036 struct group *grp; 1037 uintmax_t id; 1038 1039 if ((grp = GETGRNAM(name)) == NULL) { 1040 id = strtounum(name, 0, GID_MAX, &errstr); 1041 if (errstr) 1042 errx(EX_NOUSER, "group `%s' does not exist", name); 1043 grp = GETGRGID(id); 1044 if (grp == NULL) 1045 errx(EX_NOUSER, "group `%s' does not exist", name); 1046 } 1047 1048 return (grp); 1049 } 1050 1051 static void 1052 split_groups(StringList **groups, char *groupsstr) 1053 { 1054 struct group *grp; 1055 char *p; 1056 char tok[] = ", \t"; 1057 1058 if (*groups == NULL) 1059 *groups = sl_init(); 1060 for (p = strtok(groupsstr, tok); p != NULL; p = strtok(NULL, tok)) { 1061 grp = group_from_name_or_id(p); 1062 sl_add(*groups, newstr(grp->gr_name)); 1063 } 1064 } 1065 1066 static void 1067 validate_grname(struct userconf *cnf, char *group) 1068 { 1069 struct group *grp; 1070 1071 if (group == NULL || *group == '\0') { 1072 cnf->default_group = ""; 1073 return; 1074 } 1075 grp = group_from_name_or_id(group); 1076 cnf->default_group = newstr(grp->gr_name); 1077 } 1078 1079 static mode_t 1080 validate_mode(char *mode) 1081 { 1082 mode_t m; 1083 void *set; 1084 1085 if ((set = setmode(mode)) == NULL) 1086 errx(EX_DATAERR, "invalid directory creation mode '%s'", mode); 1087 1088 m = getmode(set, _DEF_DIRMODE); 1089 free(set); 1090 return (m); 1091 } 1092 1093 static long 1094 validate_expire(char *str, int opt) 1095 { 1096 if (!numerics(str)) 1097 errx(EX_DATAERR, "-%c argument must be numeric " 1098 "when setting defaults: %s", (char)opt, str); 1099 return strtol(str, NULL, 0); 1100 } 1101 1102 static void 1103 mix_config(struct userconf *cmdcnf, struct userconf *cfg) 1104 { 1105 1106 if (cmdcnf->default_password < 0) 1107 cmdcnf->default_password = cfg->default_password; 1108 if (cmdcnf->reuse_uids == 0) 1109 cmdcnf->reuse_uids = cfg->reuse_uids; 1110 if (cmdcnf->reuse_gids == 0) 1111 cmdcnf->reuse_gids = cfg->reuse_gids; 1112 if (cmdcnf->nispasswd == NULL) 1113 cmdcnf->nispasswd = cfg->nispasswd; 1114 if (cmdcnf->dotdir == NULL) 1115 cmdcnf->dotdir = cfg->dotdir; 1116 if (cmdcnf->newmail == NULL) 1117 cmdcnf->newmail = cfg->newmail; 1118 if (cmdcnf->logfile == NULL) 1119 cmdcnf->logfile = cfg->logfile; 1120 if (cmdcnf->home == NULL) 1121 cmdcnf->home = cfg->home; 1122 if (cmdcnf->homemode == 0) 1123 cmdcnf->homemode = cfg->homemode; 1124 if (cmdcnf->shelldir == NULL) 1125 cmdcnf->shelldir = cfg->shelldir; 1126 if (cmdcnf->shells == NULL) 1127 cmdcnf->shells = cfg->shells; 1128 if (cmdcnf->shell_default == NULL) 1129 cmdcnf->shell_default = cfg->shell_default; 1130 if (cmdcnf->default_group == NULL) 1131 cmdcnf->default_group = cfg->default_group; 1132 if (cmdcnf->groups == NULL) 1133 cmdcnf->groups = cfg->groups; 1134 if (cmdcnf->default_class == NULL) 1135 cmdcnf->default_class = cfg->default_class; 1136 if (cmdcnf->min_uid == 0) 1137 cmdcnf->min_uid = cfg->min_uid; 1138 if (cmdcnf->max_uid == 0) 1139 cmdcnf->max_uid = cfg->max_uid; 1140 if (cmdcnf->min_gid == 0) 1141 cmdcnf->min_gid = cfg->min_gid; 1142 if (cmdcnf->max_gid == 0) 1143 cmdcnf->max_gid = cfg->max_gid; 1144 if (cmdcnf->expire_days < 0) 1145 cmdcnf->expire_days = cfg->expire_days; 1146 if (cmdcnf->password_days < 0) 1147 cmdcnf->password_days = cfg->password_days; 1148 } 1149 1150 int 1151 pw_user_add(int argc, char **argv, char *arg1) 1152 { 1153 struct userconf *cnf, *cmdcnf; 1154 struct passwd *pwd; 1155 struct group *grp; 1156 struct stat st; 1157 char args[] = "C:qn:u:c:d:e:p:g:G:mM:k:s:oL:i:w:h:H:Db:NPy:Y"; 1158 char line[_PASSWORD_LEN+1], path[MAXPATHLEN]; 1159 char *gecos, *homedir, *skel, *walk, *userid, *groupid, *grname; 1160 char *default_passwd, *name, *p; 1161 const char *cfg = NULL; 1162 login_cap_t *lc; 1163 FILE *pfp, *fp; 1164 intmax_t id = -1; 1165 time_t now; 1166 int rc, ch, fd = -1; 1167 size_t i; 1168 bool dryrun, nis, pretty, quiet, createhome, precrypted, genconf; 1169 1170 dryrun = nis = pretty = quiet = createhome = precrypted = false; 1171 genconf = false; 1172 gecos = homedir = skel = userid = groupid = default_passwd = NULL; 1173 grname = name = NULL; 1174 1175 if ((cmdcnf = calloc(1, sizeof(struct userconf))) == NULL) 1176 err(EXIT_FAILURE, "calloc()"); 1177 1178 cmdcnf->default_password = cmdcnf->expire_days = cmdcnf->password_days = -1; 1179 now = time(NULL); 1180 1181 if (arg1 != NULL) { 1182 if (arg1[strspn(arg1, "0123456789")] == '\0') 1183 id = pw_checkid(arg1, UID_MAX); 1184 else 1185 name = pw_checkname(arg1, 0); 1186 } 1187 1188 while ((ch = getopt(argc, argv, args)) != -1) { 1189 switch (ch) { 1190 case 'C': 1191 cfg = optarg; 1192 break; 1193 case 'q': 1194 quiet = true; 1195 break; 1196 case 'n': 1197 name = pw_checkname(optarg, 0); 1198 break; 1199 case 'u': 1200 userid = optarg; 1201 break; 1202 case 'c': 1203 gecos = pw_checkname(optarg, 1); 1204 break; 1205 case 'd': 1206 homedir = optarg; 1207 break; 1208 case 'e': 1209 if (genconf) 1210 cmdcnf->expire_days = validate_expire(optarg, ch); 1211 else 1212 cmdcnf->expire_days = parse_date(now, optarg); 1213 break; 1214 case 'p': 1215 if (genconf) 1216 cmdcnf->password_days = validate_expire(optarg, ch); 1217 else 1218 cmdcnf->password_days = parse_date(now, optarg); 1219 break; 1220 case 'g': 1221 validate_grname(cmdcnf, optarg); 1222 grname = optarg; 1223 break; 1224 case 'G': 1225 split_groups(&cmdcnf->groups, optarg); 1226 break; 1227 case 'm': 1228 createhome = true; 1229 break; 1230 case 'M': 1231 cmdcnf->homemode = validate_mode(optarg); 1232 break; 1233 case 'k': 1234 walk = skel = optarg; 1235 if (*walk == '/') 1236 walk++; 1237 if (fstatat(conf.rootfd, walk, &st, 0) == -1) 1238 errx(EX_OSFILE, "skeleton `%s' does not " 1239 "exists", skel); 1240 if (!S_ISDIR(st.st_mode)) 1241 errx(EX_OSFILE, "skeleton `%s' is not a " 1242 "directory", skel); 1243 cmdcnf->dotdir = skel; 1244 break; 1245 case 's': 1246 cmdcnf->shell_default = optarg; 1247 break; 1248 case 'o': 1249 conf.checkduplicate = false; 1250 break; 1251 case 'L': 1252 cmdcnf->default_class = pw_checkname(optarg, 0); 1253 break; 1254 case 'i': 1255 groupid = optarg; 1256 break; 1257 case 'w': 1258 default_passwd = optarg; 1259 break; 1260 case 'H': 1261 if (fd != -1) 1262 errx(EX_USAGE, "'-h' and '-H' are mutually " 1263 "exclusive options"); 1264 fd = pw_checkfd(optarg); 1265 precrypted = true; 1266 if (fd == '-') 1267 errx(EX_USAGE, "-H expects a file descriptor"); 1268 break; 1269 case 'h': 1270 if (fd != -1) 1271 errx(EX_USAGE, "'-h' and '-H' are mutually " 1272 "exclusive options"); 1273 fd = pw_checkfd(optarg); 1274 break; 1275 case 'D': 1276 genconf = true; 1277 break; 1278 case 'b': 1279 cmdcnf->home = optarg; 1280 break; 1281 case 'N': 1282 dryrun = true; 1283 break; 1284 case 'P': 1285 pretty = true; 1286 break; 1287 case 'y': 1288 cmdcnf->nispasswd = optarg; 1289 break; 1290 case 'Y': 1291 nis = true; 1292 break; 1293 default: 1294 exit(EX_USAGE); 1295 } 1296 } 1297 1298 if (geteuid() != 0 && ! dryrun) 1299 errx(EX_NOPERM, "you must be root"); 1300 1301 if (quiet) 1302 freopen(_PATH_DEVNULL, "w", stderr); 1303 1304 cnf = get_userconfig(cfg); 1305 1306 mix_config(cmdcnf, cnf); 1307 if (default_passwd) 1308 cmdcnf->default_password = passwd_val(default_passwd, 1309 cnf->default_password); 1310 if (genconf) { 1311 if (name != NULL) 1312 errx(EX_DATAERR, "can't combine `-D' with `-n name'"); 1313 if (userid != NULL) { 1314 if ((p = strtok(userid, ", \t")) != NULL) 1315 cmdcnf->min_uid = pw_checkid(p, UID_MAX); 1316 if (cmdcnf->min_uid == 0) 1317 cmdcnf->min_uid = 1000; 1318 if ((p = strtok(NULL, " ,\t")) != NULL) 1319 cmdcnf->max_uid = pw_checkid(p, UID_MAX); 1320 if (cmdcnf->max_uid == 0) 1321 cmdcnf->max_uid = 32000; 1322 } 1323 if (groupid != NULL) { 1324 if ((p = strtok(groupid, ", \t")) != NULL) 1325 cmdcnf->min_gid = pw_checkid(p, GID_MAX); 1326 if (cmdcnf->min_gid == 0) 1327 cmdcnf->min_gid = 1000; 1328 if ((p = strtok(NULL, " ,\t")) != NULL) 1329 cmdcnf->max_gid = pw_checkid(p, GID_MAX); 1330 if (cmdcnf->max_gid == 0) 1331 cmdcnf->max_gid = 32000; 1332 } 1333 if (write_userconfig(cmdcnf, cfg)) 1334 return (EXIT_SUCCESS); 1335 err(EX_IOERR, "config update"); 1336 } 1337 1338 if (userid) 1339 id = pw_checkid(userid, UID_MAX); 1340 if (id < 0 && name == NULL) 1341 errx(EX_DATAERR, "user name or id required"); 1342 1343 if (name == NULL) 1344 errx(EX_DATAERR, "login name required"); 1345 1346 if (GETPWNAM(name) != NULL) 1347 errx(EX_DATAERR, "login name `%s' already exists", name); 1348 1349 if (!grname) 1350 grname = cmdcnf->default_group; 1351 1352 pwd = &fakeuser; 1353 pwd->pw_name = name; 1354 pwd->pw_class = cmdcnf->default_class ? cmdcnf->default_class : ""; 1355 pwd->pw_uid = pw_uidpolicy(cmdcnf, id); 1356 pwd->pw_gid = pw_gidpolicy(cnf, grname, pwd->pw_name, 1357 (gid_t) pwd->pw_uid, dryrun); 1358 1359 /* cmdcnf->password_days and cmdcnf->expire_days hold unixtime here */ 1360 if (cmdcnf->password_days > 0) 1361 pwd->pw_change = cmdcnf->password_days; 1362 if (cmdcnf->expire_days > 0) 1363 pwd->pw_expire = cmdcnf->expire_days; 1364 1365 pwd->pw_dir = pw_homepolicy(cmdcnf, homedir, pwd->pw_name); 1366 pwd->pw_shell = pw_shellpolicy(cmdcnf); 1367 lc = login_getpwclass(pwd); 1368 if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL) 1369 warn("setting crypt(3) format"); 1370 login_close(lc); 1371 pwd->pw_passwd = pw_password(cmdcnf, pwd->pw_name); 1372 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 1373 warnx("WARNING: new account `%s' has a uid of 0 " 1374 "(superuser access!)", pwd->pw_name); 1375 if (gecos) 1376 pwd->pw_gecos = gecos; 1377 1378 if (fd != -1) 1379 pw_set_passwd(pwd, fd, precrypted, false); 1380 1381 if (dryrun) 1382 return (print_user(pwd, pretty, false)); 1383 1384 if ((rc = addpwent(pwd)) != 0) { 1385 if (rc == -1) 1386 errx(EX_IOERR, "user '%s' already exists", 1387 pwd->pw_name); 1388 else if (rc != 0) 1389 err(EX_IOERR, "passwd file update"); 1390 } 1391 if (nis && cmdcnf->nispasswd && *cmdcnf->nispasswd == '/') { 1392 printf("%s\n", cmdcnf->nispasswd); 1393 rc = addnispwent(cmdcnf->nispasswd, pwd); 1394 if (rc == -1) 1395 warnx("User '%s' already exists in NIS passwd", 1396 pwd->pw_name); 1397 else if (rc != 0) 1398 warn("NIS passwd update"); 1399 /* NOTE: we treat NIS-only update errors as non-fatal */ 1400 } 1401 1402 if (cmdcnf->groups != NULL) { 1403 for (i = 0; i < cmdcnf->groups->sl_cur; i++) { 1404 grp = GETGRNAM(cmdcnf->groups->sl_str[i]); 1405 /* gr_add doesn't check if new member is already in group */ 1406 if (grp_has_member(grp, pwd->pw_name)) 1407 continue; 1408 grp = gr_add(grp, pwd->pw_name); 1409 /* 1410 * grp can only be NULL in 2 cases: 1411 * - the new member is already a member 1412 * - a problem with memory occurs 1413 * in both cases we want to skip now. 1414 */ 1415 if (grp == NULL) 1416 continue; 1417 chggrent(grp->gr_name, grp); 1418 free(grp); 1419 } 1420 } 1421 1422 pwd = GETPWNAM(name); 1423 if (pwd == NULL) 1424 errx(EX_NOUSER, "user '%s' disappeared during update", name); 1425 1426 grp = GETGRGID(pwd->pw_gid); 1427 pw_log(cnf, M_ADD, W_USER, "%s(%ju):%s(%ju):%s:%s:%s", 1428 pwd->pw_name, (uintmax_t)pwd->pw_uid, 1429 grp ? grp->gr_name : "unknown", 1430 (uintmax_t)(grp ? grp->gr_gid : (uid_t)-1), 1431 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 1432 1433 /* 1434 * let's touch and chown the user's mail file. This is not 1435 * strictly necessary under BSD with a 0755 maildir but it also 1436 * doesn't hurt anything to create the empty mailfile 1437 */ 1438 if (PWALTDIR() != PWF_ALT) { 1439 snprintf(path, sizeof(path), "%s/%s", _PATH_MAILDIR, 1440 pwd->pw_name); 1441 /* Preserve contents & mtime */ 1442 close(openat(conf.rootfd, path +1, O_RDWR | O_CREAT, 0600)); 1443 fchownat(conf.rootfd, path + 1, pwd->pw_uid, pwd->pw_gid, 1444 AT_SYMLINK_NOFOLLOW); 1445 } 1446 1447 /* 1448 * Let's create and populate the user's home directory. Note 1449 * that this also `works' for editing users if -m is used, but 1450 * existing files will *not* be overwritten. 1451 */ 1452 if (PWALTDIR() != PWF_ALT && createhome && pwd->pw_dir && 1453 *pwd->pw_dir == '/' && pwd->pw_dir[1]) 1454 create_and_populate_homedir(cmdcnf, pwd, cmdcnf->dotdir, 1455 cmdcnf->homemode, false); 1456 1457 if (!PWALTDIR() && cmdcnf->newmail && *cmdcnf->newmail && 1458 (fp = fopen(cnf->newmail, "r")) != NULL) { 1459 if ((pfp = popen(_PATH_SENDMAIL " -t", "w")) == NULL) 1460 warn("sendmail"); 1461 else { 1462 fprintf(pfp, "From: root\n" "To: %s\n" 1463 "Subject: Welcome!\n\n", pwd->pw_name); 1464 while (fgets(line, sizeof(line), fp) != NULL) { 1465 /* Do substitutions? */ 1466 fputs(line, pfp); 1467 } 1468 pclose(pfp); 1469 pw_log(cnf, M_ADD, W_USER, "%s(%ju) new user mail sent", 1470 pwd->pw_name, (uintmax_t)pwd->pw_uid); 1471 } 1472 fclose(fp); 1473 } 1474 1475 if (nis && nis_update() == 0) 1476 pw_log(cnf, M_ADD, W_USER, "NIS maps updated"); 1477 1478 return (EXIT_SUCCESS); 1479 } 1480 1481 int 1482 pw_user_mod(int argc, char **argv, char *arg1) 1483 { 1484 struct userconf *cnf; 1485 struct passwd *pwd; 1486 struct group *grp; 1487 StringList *groups = NULL; 1488 char args[] = "C:qn:u:c:d:e:p:g:G:mM:l:k:s:w:L:h:H:NPYy:"; 1489 const char *cfg = NULL; 1490 char *gecos, *homedir, *grname, *name, *newname, *walk, *skel, *shell; 1491 char *passwd, *class, *nispasswd; 1492 login_cap_t *lc; 1493 struct stat st; 1494 intmax_t id = -1; 1495 int ch, fd = -1; 1496 size_t i, j; 1497 bool quiet, createhome, pretty, dryrun, nis, edited; 1498 bool precrypted; 1499 mode_t homemode = 0; 1500 time_t expire_time, password_time, now; 1501 1502 expire_time = password_time = -1; 1503 gecos = homedir = grname = name = newname = skel = shell =NULL; 1504 passwd = NULL; 1505 class = nispasswd = NULL; 1506 quiet = createhome = pretty = dryrun = nis = precrypted = false; 1507 edited = false; 1508 now = time(NULL); 1509 1510 if (arg1 != NULL) { 1511 if (arg1[strspn(arg1, "0123456789")] == '\0') 1512 id = pw_checkid(arg1, UID_MAX); 1513 else 1514 name = arg1; 1515 } 1516 1517 while ((ch = getopt(argc, argv, args)) != -1) { 1518 switch (ch) { 1519 case 'C': 1520 cfg = optarg; 1521 break; 1522 case 'q': 1523 quiet = true; 1524 break; 1525 case 'n': 1526 name = optarg; 1527 break; 1528 case 'u': 1529 id = pw_checkid(optarg, UID_MAX); 1530 break; 1531 case 'c': 1532 gecos = pw_checkname(optarg, 1); 1533 break; 1534 case 'd': 1535 homedir = optarg; 1536 break; 1537 case 'e': 1538 expire_time = parse_date(now, optarg); 1539 break; 1540 case 'p': 1541 password_time = parse_date(now, optarg); 1542 break; 1543 case 'g': 1544 group_from_name_or_id(optarg); 1545 grname = optarg; 1546 break; 1547 case 'G': 1548 split_groups(&groups, optarg); 1549 break; 1550 case 'm': 1551 createhome = true; 1552 break; 1553 case 'M': 1554 homemode = validate_mode(optarg); 1555 break; 1556 case 'l': 1557 newname = optarg; 1558 break; 1559 case 'k': 1560 walk = skel = optarg; 1561 if (*walk == '/') 1562 walk++; 1563 if (fstatat(conf.rootfd, walk, &st, 0) == -1) 1564 errx(EX_OSFILE, "skeleton `%s' does not " 1565 "exists", skel); 1566 if (!S_ISDIR(st.st_mode)) 1567 errx(EX_OSFILE, "skeleton `%s' is not a " 1568 "directory", skel); 1569 break; 1570 case 's': 1571 shell = optarg; 1572 break; 1573 case 'w': 1574 passwd = optarg; 1575 break; 1576 case 'L': 1577 class = pw_checkname(optarg, 0); 1578 break; 1579 case 'H': 1580 if (fd != -1) 1581 errx(EX_USAGE, "'-h' and '-H' are mutually " 1582 "exclusive options"); 1583 fd = pw_checkfd(optarg); 1584 precrypted = true; 1585 if (fd == '-') 1586 errx(EX_USAGE, "-H expects a file descriptor"); 1587 break; 1588 case 'h': 1589 if (fd != -1) 1590 errx(EX_USAGE, "'-h' and '-H' are mutually " 1591 "exclusive options"); 1592 fd = pw_checkfd(optarg); 1593 break; 1594 case 'N': 1595 dryrun = true; 1596 break; 1597 case 'P': 1598 pretty = true; 1599 break; 1600 case 'y': 1601 nispasswd = optarg; 1602 break; 1603 case 'Y': 1604 nis = true; 1605 break; 1606 default: 1607 exit(EX_USAGE); 1608 } 1609 } 1610 1611 if (geteuid() != 0 && ! dryrun) 1612 errx(EX_NOPERM, "you must be root"); 1613 1614 if (quiet) 1615 freopen(_PATH_DEVNULL, "w", stderr); 1616 1617 cnf = get_userconfig(cfg); 1618 1619 if (id < 0 && name == NULL) 1620 errx(EX_DATAERR, "username or id required"); 1621 1622 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id); 1623 if (pwd == NULL) { 1624 if (name == NULL) 1625 errx(EX_NOUSER, "no such uid `%ju'", 1626 (uintmax_t) id); 1627 errx(EX_NOUSER, "no such user `%s'", name); 1628 } 1629 1630 if (name == NULL) 1631 name = pwd->pw_name; 1632 1633 if (nis && nispasswd == NULL) 1634 nispasswd = cnf->nispasswd; 1635 1636 if (PWF._altdir == PWF_REGULAR && 1637 ((pwd->pw_fields & _PWF_SOURCE) != _PWF_FILES)) { 1638 if ((pwd->pw_fields & _PWF_SOURCE) == _PWF_NIS) { 1639 if (!nis && nispasswd && *nispasswd != '/') 1640 errx(EX_NOUSER, "Cannot modify NIS user `%s'", 1641 name); 1642 } else { 1643 errx(EX_NOUSER, "Cannot modify non local user `%s'", 1644 name); 1645 } 1646 } 1647 1648 if (newname) { 1649 if (strcmp(pwd->pw_name, "root") == 0) 1650 errx(EX_DATAERR, "can't rename `root' account"); 1651 if (strcmp(pwd->pw_name, newname) != 0) { 1652 pwd->pw_name = pw_checkname(newname, 0); 1653 edited = true; 1654 } 1655 } 1656 1657 if (id >= 0 && pwd->pw_uid != id) { 1658 pwd->pw_uid = id; 1659 edited = true; 1660 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0) 1661 errx(EX_DATAERR, "can't change uid of `root' account"); 1662 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 1663 warnx("WARNING: account `%s' will have a uid of 0 " 1664 "(superuser access!)", pwd->pw_name); 1665 } 1666 1667 if (grname && pwd->pw_uid != 0) { 1668 grp = GETGRNAM(grname); 1669 if (grp == NULL) 1670 grp = GETGRGID(pw_checkid(grname, GID_MAX)); 1671 if (grp->gr_gid != pwd->pw_gid) { 1672 pwd->pw_gid = grp->gr_gid; 1673 edited = true; 1674 } 1675 } 1676 1677 1678 if (password_time >= 0 && pwd->pw_change != password_time) { 1679 pwd->pw_change = password_time; 1680 edited = true; 1681 } 1682 1683 if (expire_time >= 0 && pwd->pw_expire != expire_time) { 1684 pwd->pw_expire = expire_time; 1685 edited = true; 1686 } 1687 1688 if (shell) { 1689 shell = shell_path(cnf->shelldir, cnf->shells, shell); 1690 if (shell == NULL) 1691 shell = ""; 1692 if (strcmp(shell, pwd->pw_shell) != 0) { 1693 pwd->pw_shell = shell; 1694 edited = true; 1695 } 1696 } 1697 1698 if (class && strcmp(pwd->pw_class, class) != 0) { 1699 pwd->pw_class = class; 1700 edited = true; 1701 } 1702 1703 if (homedir && strcmp(pwd->pw_dir, homedir) != 0) { 1704 pwd->pw_dir = homedir; 1705 edited = true; 1706 if (fstatat(conf.rootfd, pwd->pw_dir, &st, 0) == -1) { 1707 if (!createhome) 1708 warnx("WARNING: home `%s' does not exist", 1709 pwd->pw_dir); 1710 } else if (!S_ISDIR(st.st_mode)) { 1711 warnx("WARNING: home `%s' is not a directory", 1712 pwd->pw_dir); 1713 } 1714 } 1715 1716 if (passwd && conf.fd == -1) { 1717 lc = login_getpwclass(pwd); 1718 if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL) 1719 warn("setting crypt(3) format"); 1720 login_close(lc); 1721 cnf->default_password = passwd_val(passwd, 1722 cnf->default_password); 1723 pwd->pw_passwd = pw_password(cnf, pwd->pw_name); 1724 edited = true; 1725 } 1726 1727 if (gecos && strcmp(pwd->pw_gecos, gecos) != 0) { 1728 pwd->pw_gecos = gecos; 1729 edited = true; 1730 } 1731 1732 if (fd != -1) 1733 edited = pw_set_passwd(pwd, fd, precrypted, true); 1734 1735 if (dryrun) 1736 return (print_user(pwd, pretty, false)); 1737 1738 if (edited) /* Only updated this if required */ 1739 perform_chgpwent(name, pwd, nis ? nispasswd : NULL); 1740 /* Now perform the needed changes concern groups */ 1741 if (groups != NULL) { 1742 /* Delete User from groups using old name */ 1743 SETGRENT(); 1744 while ((grp = GETGRENT()) != NULL) { 1745 if (grp->gr_mem == NULL) 1746 continue; 1747 for (i = 0; grp->gr_mem[i] != NULL; i++) { 1748 if (strcmp(grp->gr_mem[i] , name) != 0) 1749 continue; 1750 for (j = i; grp->gr_mem[j] != NULL ; j++) 1751 grp->gr_mem[j] = grp->gr_mem[j+1]; 1752 chggrent(grp->gr_name, grp); 1753 break; 1754 } 1755 } 1756 ENDGRENT(); 1757 /* Add the user to the needed groups */ 1758 for (i = 0; i < groups->sl_cur; i++) { 1759 grp = GETGRNAM(groups->sl_str[i]); 1760 grp = gr_add(grp, pwd->pw_name); 1761 if (grp == NULL) 1762 continue; 1763 chggrent(grp->gr_name, grp); 1764 free(grp); 1765 } 1766 } 1767 /* In case of rename we need to walk over the different groups */ 1768 if (newname) { 1769 SETGRENT(); 1770 while ((grp = GETGRENT()) != NULL) { 1771 if (grp->gr_mem == NULL) 1772 continue; 1773 for (i = 0; grp->gr_mem[i] != NULL; i++) { 1774 if (strcmp(grp->gr_mem[i], name) != 0) 1775 continue; 1776 grp->gr_mem[i] = newname; 1777 chggrent(grp->gr_name, grp); 1778 break; 1779 } 1780 } 1781 } 1782 1783 /* go get a current version of pwd */ 1784 if (newname) 1785 name = newname; 1786 pwd = GETPWNAM(name); 1787 if (pwd == NULL) 1788 errx(EX_NOUSER, "user '%s' disappeared during update", name); 1789 grp = GETGRGID(pwd->pw_gid); 1790 pw_log(cnf, M_UPDATE, W_USER, "%s(%ju):%s(%ju):%s:%s:%s", 1791 pwd->pw_name, (uintmax_t)pwd->pw_uid, 1792 grp ? grp->gr_name : "unknown", 1793 (uintmax_t)(grp ? grp->gr_gid : (uid_t)-1), 1794 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 1795 1796 /* 1797 * Let's create and populate the user's home directory. Note 1798 * that this also `works' for editing users if -m is used, but 1799 * existing files will *not* be overwritten. 1800 */ 1801 if (PWALTDIR() != PWF_ALT && createhome && pwd->pw_dir && 1802 *pwd->pw_dir == '/' && pwd->pw_dir[1]) { 1803 if (!skel) 1804 skel = cnf->dotdir; 1805 if (homemode == 0) 1806 homemode = cnf->homemode; 1807 create_and_populate_homedir(cnf, pwd, skel, homemode, true); 1808 } 1809 1810 if (nis && nis_update() == 0) 1811 pw_log(cnf, M_UPDATE, W_USER, "NIS maps updated"); 1812 1813 return (EXIT_SUCCESS); 1814 } 1815