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 -1: /* Random password */ 521 l = (arc4random() % 8 + 8); /* 8 - 16 chars */ 522 for (i = 0; i < l; i++) 523 pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)]; 524 pwbuf[i] = '\0'; 525 526 /* 527 * We give this information back to the user 528 */ 529 if (conf.fd == -1 && !dryrun) { 530 if (isatty(STDOUT_FILENO)) 531 printf("Password for '%s' is: ", user); 532 printf("%s\n", pwbuf); 533 fflush(stdout); 534 } 535 break; 536 537 case -2: /* No password at all! */ 538 return ""; 539 540 case 0: /* No login - default */ 541 default: 542 return "*"; 543 544 case 1: /* user's name */ 545 strlcpy(pwbuf, user, sizeof(pwbuf)); 546 break; 547 } 548 return pw_pwcrypt(pwbuf); 549 } 550 551 static int 552 print_user(struct passwd * pwd, bool pretty, bool v7) 553 { 554 int j; 555 char *p; 556 struct group *grp = GETGRGID(pwd->pw_gid); 557 char uname[60] = "User &", office[60] = "[None]", 558 wphone[60] = "[None]", hphone[60] = "[None]"; 559 char acexpire[32] = "[None]", pwexpire[32] = "[None]"; 560 struct tm * tptr; 561 562 if (!pretty) { 563 p = v7 ? pw_make_v7(pwd) : pw_make(pwd); 564 printf("%s\n", p); 565 free(p); 566 return (EXIT_SUCCESS); 567 } 568 569 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) { 570 strlcpy(uname, p, sizeof(uname)); 571 if ((p = strtok(NULL, ",")) != NULL) { 572 strlcpy(office, p, sizeof(office)); 573 if ((p = strtok(NULL, ",")) != NULL) { 574 strlcpy(wphone, p, sizeof(wphone)); 575 if ((p = strtok(NULL, "")) != NULL) { 576 strlcpy(hphone, p, sizeof(hphone)); 577 } 578 } 579 } 580 } 581 /* 582 * Handle '&' in gecos field 583 */ 584 if ((p = strchr(uname, '&')) != NULL) { 585 int l = strlen(pwd->pw_name); 586 int m = strlen(p); 587 588 memmove(p + l, p + 1, m); 589 memmove(p, pwd->pw_name, l); 590 *p = (char) toupper((unsigned char)*p); 591 } 592 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL) 593 strftime(acexpire, sizeof acexpire, "%c", tptr); 594 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL) 595 strftime(pwexpire, sizeof pwexpire, "%c", tptr); 596 printf("Login Name: %-15s #%-12ju Group: %-15s #%ju\n" 597 " Full Name: %s\n" 598 " Home: %-26.26s Class: %s\n" 599 " Shell: %-26.26s Office: %s\n" 600 "Work Phone: %-26.26s Home Phone: %s\n" 601 "Acc Expire: %-26.26s Pwd Expire: %s\n", 602 pwd->pw_name, (uintmax_t)pwd->pw_uid, 603 grp ? grp->gr_name : "(invalid)", (uintmax_t)pwd->pw_gid, 604 uname, pwd->pw_dir, pwd->pw_class, 605 pwd->pw_shell, office, wphone, hphone, 606 acexpire, pwexpire); 607 SETGRENT(); 608 j = 0; 609 while ((grp=GETGRENT()) != NULL) { 610 int i = 0; 611 if (grp->gr_mem != NULL) { 612 while (grp->gr_mem[i] != NULL) { 613 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) { 614 printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name); 615 break; 616 } 617 ++i; 618 } 619 } 620 } 621 ENDGRENT(); 622 printf("%s", j ? "\n" : ""); 623 return (EXIT_SUCCESS); 624 } 625 626 char * 627 pw_checkname(char *name, int gecos) 628 { 629 char showch[8]; 630 const char *badchars, *ch, *showtype; 631 int reject; 632 633 ch = name; 634 reject = 0; 635 if (gecos) { 636 /* See if the name is valid as a gecos (comment) field. */ 637 badchars = ":!@"; 638 showtype = "gecos field"; 639 } else { 640 /* See if the name is valid as a userid or group. */ 641 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\""; 642 showtype = "userid/group name"; 643 /* Userids and groups can not have a leading '-'. */ 644 if (*ch == '-') 645 reject = 1; 646 } 647 if (!reject) { 648 while (*ch) { 649 if (strchr(badchars, *ch) != NULL || 650 (!gecos && *ch < ' ') || 651 *ch == 127) { 652 reject = 1; 653 break; 654 } 655 /* 8-bit characters are only allowed in GECOS fields */ 656 if (!gecos && (*ch & 0x80)) { 657 reject = 1; 658 break; 659 } 660 ch++; 661 } 662 } 663 /* 664 * A `$' is allowed as the final character for userids and groups, 665 * mainly for the benefit of samba. 666 */ 667 if (reject && !gecos) { 668 if (*ch == '$' && *(ch + 1) == '\0') { 669 reject = 0; 670 ch++; 671 } 672 } 673 if (reject) { 674 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127) 675 ? "`%c'" : "0x%02x", *ch); 676 errx(EX_DATAERR, "invalid character %s at position %td in %s", 677 showch, (ch - name), showtype); 678 } 679 if (!gecos && (ch - name) > LOGNAMESIZE) 680 errx(EX_USAGE, "name too long `%s' (max is %d)", name, 681 LOGNAMESIZE); 682 683 return (name); 684 } 685 686 static void 687 rmat(uid_t uid) 688 { 689 DIR *d = opendir("/var/at/jobs"); 690 691 if (d != NULL) { 692 struct dirent *e; 693 694 while ((e = readdir(d)) != NULL) { 695 struct stat st; 696 697 if (strncmp(e->d_name, ".lock", 5) != 0 && 698 stat(e->d_name, &st) == 0 && 699 !S_ISDIR(st.st_mode) && 700 st.st_uid == uid) { 701 char tmp[MAXPATHLEN]; 702 703 snprintf(tmp, sizeof(tmp), "/usr/bin/atrm %s", 704 e->d_name); 705 system(tmp); 706 } 707 } 708 closedir(d); 709 } 710 } 711 712 static void 713 rmopie(char const * name) 714 { 715 char tmp[1014]; 716 FILE *fp; 717 int fd; 718 size_t len; 719 off_t atofs = 0; 720 721 if ((fd = openat(conf.rootfd, "etc/opiekeys", O_RDWR)) == -1) 722 return; 723 724 fp = fdopen(fd, "r+"); 725 len = strlen(name); 726 727 while (fgets(tmp, sizeof(tmp), fp) != NULL) { 728 if (strncmp(name, tmp, len) == 0 && tmp[len]==' ') { 729 /* Comment username out */ 730 if (fseek(fp, atofs, SEEK_SET) == 0) 731 fwrite("#", 1, 1, fp); 732 break; 733 } 734 atofs = ftell(fp); 735 } 736 /* 737 * If we got an error of any sort, don't update! 738 */ 739 fclose(fp); 740 } 741 742 int 743 pw_user_next(int argc, char **argv, char *name __unused) 744 { 745 struct userconf *cnf = NULL; 746 const char *cfg = NULL; 747 int ch; 748 bool quiet = false; 749 uid_t next; 750 751 while ((ch = getopt(argc, argv, "C:q")) != -1) { 752 switch (ch) { 753 case 'C': 754 cfg = optarg; 755 break; 756 case 'q': 757 quiet = true; 758 break; 759 } 760 } 761 762 if (quiet) 763 freopen(_PATH_DEVNULL, "w", stderr); 764 765 cnf = get_userconfig(cfg); 766 767 next = pw_uidpolicy(cnf, -1); 768 769 printf("%ju:", (uintmax_t)next); 770 pw_groupnext(cnf, quiet); 771 772 return (EXIT_SUCCESS); 773 } 774 775 int 776 pw_user_show(int argc, char **argv, char *arg1) 777 { 778 struct passwd *pwd = NULL; 779 char *name = NULL; 780 intmax_t id = -1; 781 int ch; 782 bool all = false; 783 bool pretty = false; 784 bool force = false; 785 bool v7 = false; 786 bool quiet = false; 787 788 if (arg1 != NULL) { 789 if (arg1[strspn(arg1, "0123456789")] == '\0') 790 id = pw_checkid(arg1, UID_MAX); 791 else 792 name = arg1; 793 } 794 795 while ((ch = getopt(argc, argv, "C:qn:u:FPa7")) != -1) { 796 switch (ch) { 797 case 'C': 798 /* ignore compatibility */ 799 break; 800 case 'q': 801 quiet = true; 802 break; 803 case 'n': 804 name = optarg; 805 break; 806 case 'u': 807 id = pw_checkid(optarg, UID_MAX); 808 break; 809 case 'F': 810 force = true; 811 break; 812 case 'P': 813 pretty = true; 814 break; 815 case 'a': 816 all = true; 817 break; 818 case '7': 819 v7 = true; 820 break; 821 } 822 } 823 824 if (quiet) 825 freopen(_PATH_DEVNULL, "w", stderr); 826 827 if (all) { 828 SETPWENT(); 829 while ((pwd = GETPWENT()) != NULL) 830 print_user(pwd, pretty, v7); 831 ENDPWENT(); 832 return (EXIT_SUCCESS); 833 } 834 835 if (id < 0 && name == NULL) 836 errx(EX_DATAERR, "username or id required"); 837 838 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id); 839 if (pwd == NULL) { 840 if (force) { 841 pwd = &fakeuser; 842 } else { 843 if (name == NULL) 844 errx(EX_NOUSER, "no such uid `%ju'", 845 (uintmax_t) id); 846 errx(EX_NOUSER, "no such user `%s'", name); 847 } 848 } 849 850 return (print_user(pwd, pretty, v7)); 851 } 852 853 int 854 pw_user_del(int argc, char **argv, char *arg1) 855 { 856 struct userconf *cnf = NULL; 857 struct passwd *pwd = NULL; 858 struct group *gr, *grp; 859 char *name = NULL; 860 char grname[MAXLOGNAME]; 861 char *nispasswd = NULL; 862 char file[MAXPATHLEN]; 863 char home[MAXPATHLEN]; 864 const char *cfg = NULL; 865 struct stat st; 866 intmax_t id = -1; 867 int ch, rc; 868 bool nis = false; 869 bool deletehome = false; 870 bool quiet = false; 871 872 if (arg1 != NULL) { 873 if (arg1[strspn(arg1, "0123456789")] == '\0') 874 id = pw_checkid(arg1, UID_MAX); 875 else 876 name = arg1; 877 } 878 879 while ((ch = getopt(argc, argv, "C:qn:u:rYy:")) != -1) { 880 switch (ch) { 881 case 'C': 882 cfg = optarg; 883 break; 884 case 'q': 885 quiet = true; 886 break; 887 case 'n': 888 name = optarg; 889 break; 890 case 'u': 891 id = pw_checkid(optarg, UID_MAX); 892 break; 893 case 'r': 894 deletehome = true; 895 break; 896 case 'y': 897 nispasswd = optarg; 898 break; 899 case 'Y': 900 nis = true; 901 break; 902 } 903 } 904 905 if (quiet) 906 freopen(_PATH_DEVNULL, "w", stderr); 907 908 if (id < 0 && name == NULL) 909 errx(EX_DATAERR, "username or id required"); 910 911 cnf = get_userconfig(cfg); 912 913 if (nispasswd == NULL) 914 nispasswd = cnf->nispasswd; 915 916 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id); 917 if (pwd == NULL) { 918 if (name == NULL) 919 errx(EX_NOUSER, "no such uid `%ju'", (uintmax_t) id); 920 errx(EX_NOUSER, "no such user `%s'", name); 921 } 922 923 if (PWF._altdir == PWF_REGULAR && 924 ((pwd->pw_fields & _PWF_SOURCE) != _PWF_FILES)) { 925 if ((pwd->pw_fields & _PWF_SOURCE) == _PWF_NIS) { 926 if (!nis && nispasswd && *nispasswd != '/') 927 errx(EX_NOUSER, "Cannot remove NIS user `%s'", 928 name); 929 } else { 930 errx(EX_NOUSER, "Cannot remove non local user `%s'", 931 name); 932 } 933 } 934 935 id = pwd->pw_uid; 936 if (name == NULL) 937 name = pwd->pw_name; 938 939 if (strcmp(pwd->pw_name, "root") == 0) 940 errx(EX_DATAERR, "cannot remove user 'root'"); 941 942 /* Remove opie record from /etc/opiekeys */ 943 if (PWALTDIR() != PWF_ALT) 944 rmopie(pwd->pw_name); 945 946 if (!PWALTDIR()) { 947 /* Remove crontabs */ 948 snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name); 949 if (access(file, F_OK) == 0) { 950 snprintf(file, sizeof(file), "crontab -u %s -r", 951 pwd->pw_name); 952 system(file); 953 } 954 } 955 956 /* 957 * Save these for later, since contents of pwd may be 958 * invalidated by deletion 959 */ 960 snprintf(file, sizeof(file), "%s/%s", _PATH_MAILDIR, pwd->pw_name); 961 strlcpy(home, pwd->pw_dir, sizeof(home)); 962 gr = GETGRGID(pwd->pw_gid); 963 if (gr != NULL) 964 strlcpy(grname, gr->gr_name, LOGNAMESIZE); 965 else 966 grname[0] = '\0'; 967 968 rc = delpwent(pwd); 969 if (rc == -1) 970 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name); 971 else if (rc != 0) 972 err(EX_IOERR, "passwd update"); 973 974 if (nis && nispasswd && *nispasswd=='/') { 975 rc = delnispwent(nispasswd, name); 976 if (rc == -1) 977 warnx("WARNING: user '%s' does not exist in NIS passwd", 978 pwd->pw_name); 979 else if (rc != 0) 980 warn("WARNING: NIS passwd update"); 981 } 982 983 grp = GETGRNAM(name); 984 if (grp != NULL && 985 (grp->gr_mem == NULL || *grp->gr_mem == NULL) && 986 strcmp(name, grname) == 0) 987 delgrent(GETGRNAM(name)); 988 SETGRENT(); 989 while ((grp = GETGRENT()) != NULL) { 990 int i, j; 991 char group[MAXLOGNAME]; 992 if (grp->gr_mem == NULL) 993 continue; 994 995 for (i = 0; grp->gr_mem[i] != NULL; i++) { 996 if (strcmp(grp->gr_mem[i], name) != 0) 997 continue; 998 999 for (j = i; grp->gr_mem[j] != NULL; j++) 1000 grp->gr_mem[j] = grp->gr_mem[j+1]; 1001 strlcpy(group, grp->gr_name, MAXLOGNAME); 1002 chggrent(group, grp); 1003 } 1004 } 1005 ENDGRENT(); 1006 1007 pw_log(cnf, M_DELETE, W_USER, "%s(%ju) account removed", name, 1008 (uintmax_t)id); 1009 1010 /* Remove mail file */ 1011 if (PWALTDIR() != PWF_ALT) 1012 unlinkat(conf.rootfd, file + 1, 0); 1013 1014 /* Remove at jobs */ 1015 if (!PWALTDIR() && getpwuid(id) == NULL) 1016 rmat(id); 1017 1018 /* Remove home directory and contents */ 1019 if (PWALTDIR() != PWF_ALT && deletehome && *home == '/' && 1020 GETPWUID(id) == NULL && 1021 fstatat(conf.rootfd, home + 1, &st, 0) != -1) { 1022 rm_r(conf.rootfd, home, id); 1023 pw_log(cnf, M_DELETE, W_USER, "%s(%ju) home '%s' %s" 1024 "removed", name, (uintmax_t)id, home, 1025 fstatat(conf.rootfd, home + 1, &st, 0) == -1 ? "" : "not " 1026 "completely "); 1027 } 1028 1029 return (EXIT_SUCCESS); 1030 } 1031 1032 int 1033 pw_user_lock(int argc, char **argv, char *arg1) 1034 { 1035 int ch; 1036 1037 while ((ch = getopt(argc, argv, "Cq")) != -1) { 1038 switch (ch) { 1039 case 'C': 1040 case 'q': 1041 /* compatibility */ 1042 break; 1043 } 1044 } 1045 1046 return (pw_userlock(arg1, M_LOCK)); 1047 } 1048 1049 int 1050 pw_user_unlock(int argc, char **argv, char *arg1) 1051 { 1052 int ch; 1053 1054 while ((ch = getopt(argc, argv, "Cq")) != -1) { 1055 switch (ch) { 1056 case 'C': 1057 case 'q': 1058 /* compatibility */ 1059 break; 1060 } 1061 } 1062 1063 return (pw_userlock(arg1, M_UNLOCK)); 1064 } 1065 1066 static struct group * 1067 group_from_name_or_id(char *name) 1068 { 1069 const char *errstr = NULL; 1070 struct group *grp; 1071 uintmax_t id; 1072 1073 if ((grp = GETGRNAM(name)) == NULL) { 1074 id = strtounum(name, 0, GID_MAX, &errstr); 1075 if (errstr) 1076 errx(EX_NOUSER, "group `%s' does not exist", name); 1077 grp = GETGRGID(id); 1078 if (grp == NULL) 1079 errx(EX_NOUSER, "group `%s' does not exist", name); 1080 } 1081 1082 return (grp); 1083 } 1084 1085 static void 1086 split_groups(StringList **groups, char *groupsstr) 1087 { 1088 struct group *grp; 1089 char *p; 1090 char tok[] = ", \t"; 1091 1092 if (*groups == NULL) 1093 *groups = sl_init(); 1094 for (p = strtok(groupsstr, tok); p != NULL; p = strtok(NULL, tok)) { 1095 grp = group_from_name_or_id(p); 1096 sl_add(*groups, newstr(grp->gr_name)); 1097 } 1098 } 1099 1100 static void 1101 validate_grname(struct userconf *cnf, char *group) 1102 { 1103 struct group *grp; 1104 1105 if (group == NULL || *group == '\0') { 1106 cnf->default_group = ""; 1107 return; 1108 } 1109 grp = group_from_name_or_id(group); 1110 cnf->default_group = newstr(grp->gr_name); 1111 } 1112 1113 static mode_t 1114 validate_mode(char *mode) 1115 { 1116 mode_t m; 1117 void *set; 1118 1119 if ((set = setmode(mode)) == NULL) 1120 errx(EX_DATAERR, "invalid directory creation mode '%s'", mode); 1121 1122 m = getmode(set, _DEF_DIRMODE); 1123 free(set); 1124 return (m); 1125 } 1126 1127 static void 1128 mix_config(struct userconf *cmdcnf, struct userconf *cfg) 1129 { 1130 1131 if (cmdcnf->default_password == 0) 1132 cmdcnf->default_password = cfg->default_password; 1133 if (cmdcnf->reuse_uids == 0) 1134 cmdcnf->reuse_uids = cfg->reuse_uids; 1135 if (cmdcnf->reuse_gids == 0) 1136 cmdcnf->reuse_gids = cfg->reuse_gids; 1137 if (cmdcnf->nispasswd == NULL) 1138 cmdcnf->nispasswd = cfg->nispasswd; 1139 if (cmdcnf->dotdir == NULL) 1140 cmdcnf->dotdir = cfg->dotdir; 1141 if (cmdcnf->newmail == NULL) 1142 cmdcnf->newmail = cfg->newmail; 1143 if (cmdcnf->logfile == NULL) 1144 cmdcnf->logfile = cfg->logfile; 1145 if (cmdcnf->home == NULL) 1146 cmdcnf->home = cfg->home; 1147 if (cmdcnf->homemode == 0) 1148 cmdcnf->homemode = cfg->homemode; 1149 if (cmdcnf->shelldir == NULL) 1150 cmdcnf->shelldir = cfg->shelldir; 1151 if (cmdcnf->shells == NULL) 1152 cmdcnf->shells = cfg->shells; 1153 if (cmdcnf->shell_default == NULL) 1154 cmdcnf->shell_default = cfg->shell_default; 1155 if (cmdcnf->default_group == NULL) 1156 cmdcnf->default_group = cfg->default_group; 1157 if (cmdcnf->groups == NULL) 1158 cmdcnf->groups = cfg->groups; 1159 if (cmdcnf->default_class == NULL) 1160 cmdcnf->default_class = cfg->default_class; 1161 if (cmdcnf->min_uid == 0) 1162 cmdcnf->min_uid = cfg->min_uid; 1163 if (cmdcnf->max_uid == 0) 1164 cmdcnf->max_uid = cfg->max_uid; 1165 if (cmdcnf->min_gid == 0) 1166 cmdcnf->min_gid = cfg->min_gid; 1167 if (cmdcnf->max_gid == 0) 1168 cmdcnf->max_gid = cfg->max_gid; 1169 if (cmdcnf->expire_days == 0) 1170 cmdcnf->expire_days = cfg->expire_days; 1171 if (cmdcnf->password_days == 0) 1172 cmdcnf->password_days = cfg->password_days; 1173 } 1174 1175 int 1176 pw_user_add(int argc, char **argv, char *arg1) 1177 { 1178 struct userconf *cnf, *cmdcnf; 1179 struct passwd *pwd; 1180 struct group *grp; 1181 struct stat st; 1182 char args[] = "C:qn:u:c:d:e:p:g:G:mM:k:s:oL:i:w:h:H:Db:NPy:Y"; 1183 char line[_PASSWORD_LEN+1], path[MAXPATHLEN]; 1184 char *gecos, *homedir, *skel, *walk, *userid, *groupid, *grname; 1185 char *default_passwd, *name, *p; 1186 const char *cfg = NULL; 1187 login_cap_t *lc; 1188 FILE *pfp, *fp; 1189 intmax_t id = -1; 1190 time_t now; 1191 int rc, ch, fd = -1; 1192 size_t i; 1193 bool dryrun, nis, pretty, quiet, createhome, precrypted, genconf; 1194 1195 dryrun = nis = pretty = quiet = createhome = precrypted = false; 1196 genconf = false; 1197 gecos = homedir = skel = userid = groupid = default_passwd = NULL; 1198 grname = name = NULL; 1199 1200 if ((cmdcnf = calloc(1, sizeof(struct userconf))) == NULL) 1201 err(EXIT_FAILURE, "calloc()"); 1202 1203 if (arg1 != NULL) { 1204 if (arg1[strspn(arg1, "0123456789")] == '\0') 1205 id = pw_checkid(arg1, UID_MAX); 1206 else 1207 name = pw_checkname(arg1, 0); 1208 } 1209 1210 while ((ch = getopt(argc, argv, args)) != -1) { 1211 switch (ch) { 1212 case 'C': 1213 cfg = optarg; 1214 break; 1215 case 'q': 1216 quiet = true; 1217 break; 1218 case 'n': 1219 name = pw_checkname(optarg, 0); 1220 break; 1221 case 'u': 1222 userid = optarg; 1223 break; 1224 case 'c': 1225 gecos = pw_checkname(optarg, 1); 1226 break; 1227 case 'd': 1228 homedir = optarg; 1229 break; 1230 case 'e': 1231 now = time(NULL); 1232 cmdcnf->expire_days = parse_date(now, optarg); 1233 break; 1234 case 'p': 1235 now = time(NULL); 1236 cmdcnf->password_days = parse_date(now, optarg); 1237 break; 1238 case 'g': 1239 validate_grname(cmdcnf, optarg); 1240 grname = optarg; 1241 break; 1242 case 'G': 1243 split_groups(&cmdcnf->groups, optarg); 1244 break; 1245 case 'm': 1246 createhome = true; 1247 break; 1248 case 'M': 1249 cmdcnf->homemode = validate_mode(optarg); 1250 break; 1251 case 'k': 1252 walk = skel = optarg; 1253 if (*walk == '/') 1254 walk++; 1255 if (fstatat(conf.rootfd, walk, &st, 0) == -1) 1256 errx(EX_OSFILE, "skeleton `%s' does not " 1257 "exists", skel); 1258 if (!S_ISDIR(st.st_mode)) 1259 errx(EX_OSFILE, "skeleton `%s' is not a " 1260 "directory", skel); 1261 cmdcnf->dotdir = skel; 1262 break; 1263 case 's': 1264 cmdcnf->shell_default = optarg; 1265 break; 1266 case 'o': 1267 conf.checkduplicate = false; 1268 break; 1269 case 'L': 1270 cmdcnf->default_class = pw_checkname(optarg, 0); 1271 break; 1272 case 'i': 1273 groupid = optarg; 1274 break; 1275 case 'w': 1276 default_passwd = optarg; 1277 break; 1278 case 'H': 1279 if (fd != -1) 1280 errx(EX_USAGE, "'-h' and '-H' are mutually " 1281 "exclusive options"); 1282 fd = pw_checkfd(optarg); 1283 precrypted = true; 1284 if (fd == '-') 1285 errx(EX_USAGE, "-H expects a file descriptor"); 1286 break; 1287 case 'h': 1288 if (fd != -1) 1289 errx(EX_USAGE, "'-h' and '-H' are mutually " 1290 "exclusive options"); 1291 fd = pw_checkfd(optarg); 1292 break; 1293 case 'D': 1294 genconf = true; 1295 break; 1296 case 'b': 1297 cmdcnf->home = optarg; 1298 break; 1299 case 'N': 1300 dryrun = true; 1301 break; 1302 case 'P': 1303 pretty = true; 1304 break; 1305 case 'y': 1306 cmdcnf->nispasswd = optarg; 1307 break; 1308 case 'Y': 1309 nis = true; 1310 break; 1311 } 1312 } 1313 1314 if (geteuid() != 0 && ! dryrun) 1315 errx(EX_NOPERM, "you must be root"); 1316 1317 if (quiet) 1318 freopen(_PATH_DEVNULL, "w", stderr); 1319 1320 cnf = get_userconfig(cfg); 1321 1322 mix_config(cmdcnf, cnf); 1323 if (default_passwd) 1324 cmdcnf->default_password = passwd_val(default_passwd, 1325 cnf->default_password); 1326 if (genconf) { 1327 if (name != NULL) 1328 errx(EX_DATAERR, "can't combine `-D' with `-n name'"); 1329 if (userid != NULL) { 1330 if ((p = strtok(userid, ", \t")) != NULL) 1331 cmdcnf->min_uid = pw_checkid(p, UID_MAX); 1332 if (cmdcnf->min_uid == 0) 1333 cmdcnf->min_uid = 1000; 1334 if ((p = strtok(NULL, " ,\t")) != NULL) 1335 cmdcnf->max_uid = pw_checkid(p, UID_MAX); 1336 if (cmdcnf->max_uid == 0) 1337 cmdcnf->max_uid = 32000; 1338 } 1339 if (groupid != NULL) { 1340 if ((p = strtok(groupid, ", \t")) != NULL) 1341 cmdcnf->min_gid = pw_checkid(p, GID_MAX); 1342 if (cmdcnf->min_gid == 0) 1343 cmdcnf->min_gid = 1000; 1344 if ((p = strtok(NULL, " ,\t")) != NULL) 1345 cmdcnf->max_gid = pw_checkid(p, GID_MAX); 1346 if (cmdcnf->max_gid == 0) 1347 cmdcnf->max_gid = 32000; 1348 } 1349 if (write_userconfig(cmdcnf, cfg)) 1350 return (EXIT_SUCCESS); 1351 err(EX_IOERR, "config update"); 1352 } 1353 1354 if (userid) 1355 id = pw_checkid(userid, UID_MAX); 1356 if (id < 0 && name == NULL) 1357 errx(EX_DATAERR, "user name or id required"); 1358 1359 if (name == NULL) 1360 errx(EX_DATAERR, "login name required"); 1361 1362 if (GETPWNAM(name) != NULL) 1363 errx(EX_DATAERR, "login name `%s' already exists", name); 1364 1365 if (!grname) 1366 grname = cmdcnf->default_group; 1367 1368 pwd = &fakeuser; 1369 pwd->pw_name = name; 1370 pwd->pw_class = cmdcnf->default_class ? cmdcnf->default_class : ""; 1371 pwd->pw_uid = pw_uidpolicy(cmdcnf, id); 1372 pwd->pw_gid = pw_gidpolicy(cnf, grname, pwd->pw_name, 1373 (gid_t) pwd->pw_uid, dryrun); 1374 pwd->pw_change = cmdcnf->password_days; 1375 pwd->pw_expire = cmdcnf->expire_days; 1376 pwd->pw_dir = pw_homepolicy(cmdcnf, homedir, pwd->pw_name); 1377 pwd->pw_shell = pw_shellpolicy(cmdcnf); 1378 lc = login_getpwclass(pwd); 1379 if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL) 1380 warn("setting crypt(3) format"); 1381 login_close(lc); 1382 pwd->pw_passwd = pw_password(cmdcnf, pwd->pw_name, dryrun); 1383 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 1384 warnx("WARNING: new account `%s' has a uid of 0 " 1385 "(superuser access!)", pwd->pw_name); 1386 if (gecos) 1387 pwd->pw_gecos = gecos; 1388 1389 if (fd != -1) 1390 pw_set_passwd(pwd, fd, precrypted, false); 1391 1392 if (dryrun) 1393 return (print_user(pwd, pretty, false)); 1394 1395 if ((rc = addpwent(pwd)) != 0) { 1396 if (rc == -1) 1397 errx(EX_IOERR, "user '%s' already exists", 1398 pwd->pw_name); 1399 else if (rc != 0) 1400 err(EX_IOERR, "passwd file update"); 1401 } 1402 if (nis && cmdcnf->nispasswd && *cmdcnf->nispasswd == '/') { 1403 printf("%s\n", cmdcnf->nispasswd); 1404 rc = addnispwent(cmdcnf->nispasswd, pwd); 1405 if (rc == -1) 1406 warnx("User '%s' already exists in NIS passwd", 1407 pwd->pw_name); 1408 else if (rc != 0) 1409 warn("NIS passwd update"); 1410 /* NOTE: we treat NIS-only update errors as non-fatal */ 1411 } 1412 1413 if (cmdcnf->groups != NULL) { 1414 for (i = 0; i < cmdcnf->groups->sl_cur; i++) { 1415 grp = GETGRNAM(cmdcnf->groups->sl_str[i]); 1416 grp = gr_add(grp, pwd->pw_name); 1417 /* 1418 * grp can only be NULL in 2 cases: 1419 * - the new member is already a member 1420 * - a problem with memory occurs 1421 * in both cases we want to skip now. 1422 */ 1423 if (grp == NULL) 1424 continue; 1425 chggrent(grp->gr_name, grp); 1426 free(grp); 1427 } 1428 } 1429 1430 pwd = GETPWNAM(name); 1431 if (pwd == NULL) 1432 errx(EX_NOUSER, "user '%s' disappeared during update", name); 1433 1434 grp = GETGRGID(pwd->pw_gid); 1435 pw_log(cnf, M_ADD, W_USER, "%s(%ju):%s(%ju):%s:%s:%s", 1436 pwd->pw_name, (uintmax_t)pwd->pw_uid, 1437 grp ? grp->gr_name : "unknown", 1438 (uintmax_t)(grp ? grp->gr_gid : (uid_t)-1), 1439 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 1440 1441 /* 1442 * let's touch and chown the user's mail file. This is not 1443 * strictly necessary under BSD with a 0755 maildir but it also 1444 * doesn't hurt anything to create the empty mailfile 1445 */ 1446 if (PWALTDIR() != PWF_ALT) { 1447 snprintf(path, sizeof(path), "%s/%s", _PATH_MAILDIR, 1448 pwd->pw_name); 1449 /* Preserve contents & mtime */ 1450 close(openat(conf.rootfd, path +1, O_RDWR | O_CREAT, 0600)); 1451 fchownat(conf.rootfd, path + 1, pwd->pw_uid, pwd->pw_gid, 1452 AT_SYMLINK_NOFOLLOW); 1453 } 1454 1455 /* 1456 * Let's create and populate the user's home directory. Note 1457 * that this also `works' for editing users if -m is used, but 1458 * existing files will *not* be overwritten. 1459 */ 1460 if (PWALTDIR() != PWF_ALT && createhome && pwd->pw_dir && 1461 *pwd->pw_dir == '/' && pwd->pw_dir[1]) 1462 create_and_populate_homedir(cmdcnf, pwd, cmdcnf->dotdir, 1463 cmdcnf->homemode, false); 1464 1465 if (!PWALTDIR() && cmdcnf->newmail && *cmdcnf->newmail && 1466 (fp = fopen(cnf->newmail, "r")) != NULL) { 1467 if ((pfp = popen(_PATH_SENDMAIL " -t", "w")) == NULL) 1468 warn("sendmail"); 1469 else { 1470 fprintf(pfp, "From: root\n" "To: %s\n" 1471 "Subject: Welcome!\n\n", pwd->pw_name); 1472 while (fgets(line, sizeof(line), fp) != NULL) { 1473 /* Do substitutions? */ 1474 fputs(line, pfp); 1475 } 1476 pclose(pfp); 1477 pw_log(cnf, M_ADD, W_USER, "%s(%ju) new user mail sent", 1478 pwd->pw_name, (uintmax_t)pwd->pw_uid); 1479 } 1480 fclose(fp); 1481 } 1482 1483 if (nis && nis_update() == 0) 1484 pw_log(cnf, M_ADD, W_USER, "NIS maps updated"); 1485 1486 return (EXIT_SUCCESS); 1487 } 1488 1489 int 1490 pw_user_mod(int argc, char **argv, char *arg1) 1491 { 1492 struct userconf *cnf; 1493 struct passwd *pwd; 1494 struct group *grp; 1495 StringList *groups = NULL; 1496 char args[] = "C:qn:u:c:d:e:p:g:G:mM:l:k:s:w:L:h:H:NPYy:"; 1497 const char *cfg = NULL; 1498 char *gecos, *homedir, *grname, *name, *newname, *walk, *skel, *shell; 1499 char *passwd, *class, *nispasswd; 1500 login_cap_t *lc; 1501 struct stat st; 1502 intmax_t id = -1; 1503 int ch, fd = -1; 1504 size_t i, j; 1505 bool quiet, createhome, pretty, dryrun, nis, edited; 1506 bool precrypted; 1507 mode_t homemode = 0; 1508 time_t expire_days, password_days, now; 1509 1510 expire_days = password_days = -1; 1511 gecos = homedir = grname = name = newname = skel = shell =NULL; 1512 passwd = NULL; 1513 class = nispasswd = NULL; 1514 quiet = createhome = pretty = dryrun = nis = precrypted = false; 1515 edited = false; 1516 1517 if (arg1 != NULL) { 1518 if (arg1[strspn(arg1, "0123456789")] == '\0') 1519 id = pw_checkid(arg1, UID_MAX); 1520 else 1521 name = arg1; 1522 } 1523 1524 while ((ch = getopt(argc, argv, args)) != -1) { 1525 switch (ch) { 1526 case 'C': 1527 cfg = optarg; 1528 break; 1529 case 'q': 1530 quiet = true; 1531 break; 1532 case 'n': 1533 name = optarg; 1534 break; 1535 case 'u': 1536 id = pw_checkid(optarg, UID_MAX); 1537 break; 1538 case 'c': 1539 gecos = pw_checkname(optarg, 1); 1540 break; 1541 case 'd': 1542 homedir = optarg; 1543 break; 1544 case 'e': 1545 now = time(NULL); 1546 expire_days = parse_date(now, optarg); 1547 break; 1548 case 'p': 1549 now = time(NULL); 1550 password_days = parse_date(now, optarg); 1551 break; 1552 case 'g': 1553 group_from_name_or_id(optarg); 1554 grname = optarg; 1555 break; 1556 case 'G': 1557 split_groups(&groups, optarg); 1558 break; 1559 case 'm': 1560 createhome = true; 1561 break; 1562 case 'M': 1563 homemode = validate_mode(optarg); 1564 break; 1565 case 'l': 1566 newname = optarg; 1567 break; 1568 case 'k': 1569 walk = skel = optarg; 1570 if (*walk == '/') 1571 walk++; 1572 if (fstatat(conf.rootfd, walk, &st, 0) == -1) 1573 errx(EX_OSFILE, "skeleton `%s' does not " 1574 "exists", skel); 1575 if (!S_ISDIR(st.st_mode)) 1576 errx(EX_OSFILE, "skeleton `%s' is not a " 1577 "directory", skel); 1578 break; 1579 case 's': 1580 shell = optarg; 1581 break; 1582 case 'w': 1583 passwd = optarg; 1584 break; 1585 case 'L': 1586 class = pw_checkname(optarg, 0); 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 precrypted = true; 1594 if (fd == '-') 1595 errx(EX_USAGE, "-H expects a file descriptor"); 1596 break; 1597 case 'h': 1598 if (fd != -1) 1599 errx(EX_USAGE, "'-h' and '-H' are mutually " 1600 "exclusive options"); 1601 fd = pw_checkfd(optarg); 1602 break; 1603 case 'N': 1604 dryrun = true; 1605 break; 1606 case 'P': 1607 pretty = true; 1608 break; 1609 case 'y': 1610 nispasswd = optarg; 1611 break; 1612 case 'Y': 1613 nis = true; 1614 break; 1615 } 1616 } 1617 1618 if (geteuid() != 0 && ! dryrun) 1619 errx(EX_NOPERM, "you must be root"); 1620 1621 if (quiet) 1622 freopen(_PATH_DEVNULL, "w", stderr); 1623 1624 cnf = get_userconfig(cfg); 1625 1626 if (id < 0 && name == NULL) 1627 errx(EX_DATAERR, "username or id required"); 1628 1629 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id); 1630 if (pwd == NULL) { 1631 if (name == NULL) 1632 errx(EX_NOUSER, "no such uid `%ju'", 1633 (uintmax_t) id); 1634 errx(EX_NOUSER, "no such user `%s'", name); 1635 } 1636 1637 if (name == NULL) 1638 name = pwd->pw_name; 1639 1640 if (nis && nispasswd == NULL) 1641 nispasswd = cnf->nispasswd; 1642 1643 if (PWF._altdir == PWF_REGULAR && 1644 ((pwd->pw_fields & _PWF_SOURCE) != _PWF_FILES)) { 1645 if ((pwd->pw_fields & _PWF_SOURCE) == _PWF_NIS) { 1646 if (!nis && nispasswd && *nispasswd != '/') 1647 errx(EX_NOUSER, "Cannot modify NIS user `%s'", 1648 name); 1649 } else { 1650 errx(EX_NOUSER, "Cannot modify non local user `%s'", 1651 name); 1652 } 1653 } 1654 1655 if (newname) { 1656 if (strcmp(pwd->pw_name, "root") == 0) 1657 errx(EX_DATAERR, "can't rename `root' account"); 1658 if (strcmp(pwd->pw_name, newname) != 0) { 1659 pwd->pw_name = pw_checkname(newname, 0); 1660 edited = true; 1661 } 1662 } 1663 1664 if (id >= 0 && pwd->pw_uid != id) { 1665 pwd->pw_uid = id; 1666 edited = true; 1667 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0) 1668 errx(EX_DATAERR, "can't change uid of `root' account"); 1669 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 1670 warnx("WARNING: account `%s' will have a uid of 0 " 1671 "(superuser access!)", pwd->pw_name); 1672 } 1673 1674 if (grname && pwd->pw_uid != 0) { 1675 grp = GETGRNAM(grname); 1676 if (grp == NULL) 1677 grp = GETGRGID(pw_checkid(grname, GID_MAX)); 1678 if (grp->gr_gid != pwd->pw_gid) { 1679 pwd->pw_gid = grp->gr_gid; 1680 edited = true; 1681 } 1682 } 1683 1684 if (password_days >= 0 && pwd->pw_change != password_days) { 1685 pwd->pw_change = password_days; 1686 edited = true; 1687 } 1688 1689 if (expire_days >= 0 && pwd->pw_expire != expire_days) { 1690 pwd->pw_expire = expire_days; 1691 edited = true; 1692 } 1693 1694 if (shell) { 1695 shell = shell_path(cnf->shelldir, cnf->shells, shell); 1696 if (shell == NULL) 1697 shell = ""; 1698 if (strcmp(shell, pwd->pw_shell) != 0) { 1699 pwd->pw_shell = shell; 1700 edited = true; 1701 } 1702 } 1703 1704 if (class && strcmp(pwd->pw_class, class) != 0) { 1705 pwd->pw_class = class; 1706 edited = true; 1707 } 1708 1709 if (homedir && strcmp(pwd->pw_dir, homedir) != 0) { 1710 pwd->pw_dir = homedir; 1711 edited = true; 1712 if (fstatat(conf.rootfd, pwd->pw_dir, &st, 0) == -1) { 1713 if (!createhome) 1714 warnx("WARNING: home `%s' does not exist", 1715 pwd->pw_dir); 1716 } else if (!S_ISDIR(st.st_mode)) { 1717 warnx("WARNING: home `%s' is not a directory", 1718 pwd->pw_dir); 1719 } 1720 } 1721 1722 if (passwd && conf.fd == -1) { 1723 lc = login_getpwclass(pwd); 1724 if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL) 1725 warn("setting crypt(3) format"); 1726 login_close(lc); 1727 cnf->default_password = passwd_val(passwd, 1728 cnf->default_password); 1729 pwd->pw_passwd = pw_password(cnf, pwd->pw_name, dryrun); 1730 edited = true; 1731 } 1732 1733 if (gecos && strcmp(pwd->pw_gecos, gecos) != 0) { 1734 pwd->pw_gecos = gecos; 1735 edited = true; 1736 } 1737 1738 if (fd != -1) 1739 edited = pw_set_passwd(pwd, fd, precrypted, true); 1740 1741 if (dryrun) 1742 return (print_user(pwd, pretty, false)); 1743 1744 if (edited) /* Only updated this if required */ 1745 perform_chgpwent(name, pwd, nis ? nispasswd : NULL); 1746 /* Now perform the needed changes concern groups */ 1747 if (groups != NULL) { 1748 /* Delete User from groups using old name */ 1749 SETGRENT(); 1750 while ((grp = GETGRENT()) != NULL) { 1751 if (grp->gr_mem == NULL) 1752 continue; 1753 for (i = 0; grp->gr_mem[i] != NULL; i++) { 1754 if (strcmp(grp->gr_mem[i] , name) != 0) 1755 continue; 1756 for (j = i; grp->gr_mem[j] != NULL ; j++) 1757 grp->gr_mem[j] = grp->gr_mem[j+1]; 1758 chggrent(grp->gr_name, grp); 1759 break; 1760 } 1761 } 1762 ENDGRENT(); 1763 /* Add the user to the needed groups */ 1764 for (i = 0; i < groups->sl_cur; i++) { 1765 grp = GETGRNAM(groups->sl_str[i]); 1766 grp = gr_add(grp, pwd->pw_name); 1767 if (grp == NULL) 1768 continue; 1769 chggrent(grp->gr_name, grp); 1770 free(grp); 1771 } 1772 } 1773 /* In case of rename we need to walk over the different groups */ 1774 if (newname) { 1775 SETGRENT(); 1776 while ((grp = GETGRENT()) != NULL) { 1777 if (grp->gr_mem == NULL) 1778 continue; 1779 for (i = 0; grp->gr_mem[i] != NULL; i++) { 1780 if (strcmp(grp->gr_mem[i], name) != 0) 1781 continue; 1782 grp->gr_mem[i] = newname; 1783 chggrent(grp->gr_name, grp); 1784 break; 1785 } 1786 } 1787 } 1788 1789 /* go get a current version of pwd */ 1790 if (newname) 1791 name = newname; 1792 pwd = GETPWNAM(name); 1793 if (pwd == NULL) 1794 errx(EX_NOUSER, "user '%s' disappeared during update", name); 1795 grp = GETGRGID(pwd->pw_gid); 1796 pw_log(cnf, M_UPDATE, W_USER, "%s(%ju):%s(%ju):%s:%s:%s", 1797 pwd->pw_name, (uintmax_t)pwd->pw_uid, 1798 grp ? grp->gr_name : "unknown", 1799 (uintmax_t)(grp ? grp->gr_gid : (uid_t)-1), 1800 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 1801 1802 /* 1803 * Let's create and populate the user's home directory. Note 1804 * that this also `works' for editing users if -m is used, but 1805 * existing files will *not* be overwritten. 1806 */ 1807 if (PWALTDIR() != PWF_ALT && createhome && pwd->pw_dir && 1808 *pwd->pw_dir == '/' && pwd->pw_dir[1]) { 1809 if (!skel) 1810 skel = cnf->dotdir; 1811 if (homemode == 0) 1812 homemode = cnf->homemode; 1813 create_and_populate_homedir(cnf, pwd, skel, homemode, true); 1814 } 1815 1816 if (nis && nis_update() == 0) 1817 pw_log(cnf, M_UPDATE, W_USER, "NIS maps updated"); 1818 1819 return (EXIT_SUCCESS); 1820 } 1821