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