1 /* $NetBSD: user.c,v 1.123 2009/03/20 02:53:47 mike Exp $ */ 2 3 /* 4 * Copyright (c) 1999 Alistair G. Crooks. All rights reserved. 5 * Copyright (c) 2005 Liam J. Foy. 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 * 3. The name of the author may not be used to endorse or promote 16 * products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 25 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1999\ 35 The NetBSD Foundation, Inc. All rights reserved."); 36 __RCSID("$NetBSD: user.c,v 1.123 2009/03/20 02:53:47 mike Exp $"); 37 #endif 38 39 #include <sys/types.h> 40 #include <sys/param.h> 41 #include <sys/stat.h> 42 43 #include <ctype.h> 44 #include <dirent.h> 45 #include <err.h> 46 #include <fcntl.h> 47 #include <grp.h> 48 #ifdef EXTENSIONS 49 #include <login_cap.h> 50 #endif 51 #include <paths.h> 52 #include <pwd.h> 53 #include <regex.h> 54 #include <stdarg.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <syslog.h> 59 #include <time.h> 60 #include <unistd.h> 61 #include <util.h> 62 #include <errno.h> 63 64 #include "defs.h" 65 #include "usermgmt.h" 66 67 68 /* this struct describes a uid range */ 69 typedef struct range_t { 70 int r_from; /* low uid */ 71 int r_to; /* high uid */ 72 } range_t; 73 74 /* this struct encapsulates the user information */ 75 typedef struct user_t { 76 int u_flags; /* see below */ 77 int u_uid; /* uid of user */ 78 char *u_password; /* encrypted password */ 79 char *u_comment; /* comment field */ 80 char *u_home; /* home directory */ 81 mode_t u_homeperm; /* permissions of home dir */ 82 char *u_primgrp; /* primary group */ 83 int u_groupc; /* # of secondary groups */ 84 const char *u_groupv[NGROUPS_MAX]; /* secondary groups */ 85 char *u_shell; /* user's shell */ 86 char *u_basedir; /* base directory for home */ 87 char *u_expire; /* when password will expire */ 88 char *u_inactive; /* when account will expire */ 89 char *u_skeldir; /* directory for startup files */ 90 char *u_class; /* login class */ 91 unsigned u_rsize; /* size of range array */ 92 unsigned u_rc; /* # of ranges */ 93 range_t *u_rv; /* the ranges */ 94 unsigned u_defrc; /* # of ranges in defaults */ 95 int u_preserve; /* preserve uids on deletion */ 96 int u_allow_samba; /* allow trailing '$' for samba login names */ 97 int u_locked; /* user account lock */ 98 } user_t; 99 100 /* flags for which fields of the user_t replace the passwd entry */ 101 enum { 102 F_COMMENT = 0x0001, 103 F_DUPUID = 0x0002, 104 F_EXPIRE = 0x0004, 105 F_GROUP = 0x0008, 106 F_HOMEDIR = 0x0010, 107 F_MKDIR = 0x0020, 108 F_INACTIVE = 0x0040, 109 F_PASSWORD = 0x0080, 110 F_SECGROUP = 0x0100, 111 F_SHELL = 0x0200, 112 F_UID = 0x0400, 113 F_USERNAME = 0x0800, 114 F_CLASS = 0x1000 115 }; 116 117 #define UNLOCK 0 118 #define LOCK 1 119 #define LOCKED "*LOCKED*" 120 121 #define PATH_LOGINCONF "/etc/login.conf" 122 123 #ifndef DEF_GROUP 124 #define DEF_GROUP "users" 125 #endif 126 127 #ifndef DEF_BASEDIR 128 #define DEF_BASEDIR "/home" 129 #endif 130 131 #ifndef DEF_SKELDIR 132 #define DEF_SKELDIR "/etc/skel" 133 #endif 134 135 #ifndef DEF_SHELL 136 #define DEF_SHELL _PATH_BSHELL 137 #endif 138 139 #ifndef DEF_COMMENT 140 #define DEF_COMMENT "" 141 #endif 142 143 #ifndef DEF_LOWUID 144 #define DEF_LOWUID 1000 145 #endif 146 147 #ifndef DEF_HIGHUID 148 #define DEF_HIGHUID 60000 149 #endif 150 151 #ifndef DEF_INACTIVE 152 #define DEF_INACTIVE 0 153 #endif 154 155 #ifndef DEF_EXPIRE 156 #define DEF_EXPIRE NULL 157 #endif 158 159 #ifndef DEF_CLASS 160 #define DEF_CLASS "" 161 #endif 162 163 #ifndef WAITSECS 164 #define WAITSECS 10 165 #endif 166 167 #ifndef NOBODY_UID 168 #define NOBODY_UID 32767 169 #endif 170 171 #ifndef DEF_HOMEPERM 172 #define DEF_HOMEPERM 0755 173 #endif 174 175 /* some useful constants */ 176 enum { 177 MaxShellNameLen = 256, 178 MaxFileNameLen = MAXPATHLEN, 179 MaxUserNameLen = LOGIN_NAME_MAX - 1, 180 MaxCommandLen = 2048, 181 MaxEntryLen = 2048, 182 PasswordLength = 2048, 183 184 DES_Len = 13, 185 186 LowGid = DEF_LOWUID, 187 HighGid = DEF_HIGHUID 188 }; 189 190 /* Full paths of programs used here */ 191 #define CHMOD "/bin/chmod" 192 #define CHOWN "/usr/sbin/chown" 193 #define MKDIR "/bin/mkdir" 194 #define MV "/bin/mv" 195 #define NOLOGIN "/sbin/nologin" 196 #define PAX "/bin/pax" 197 #define RM "/bin/rm" 198 199 #define UNSET_INACTIVE "Null (unset)" 200 #define UNSET_EXPIRY "Null (unset)" 201 202 static int asystem(const char *fmt, ...) 203 __attribute__((__format__(__printf__, 1, 2))); 204 static int is_number(const char *); 205 static struct group *find_group_info(const char *); 206 static int verbose; 207 208 static char * 209 skipspace(char *s) 210 { 211 for (; *s && isspace((unsigned char)*s) ; s++) { 212 } 213 return s; 214 } 215 216 static int 217 check_numeric(const char *val, const char *name) 218 { 219 if (!is_number(val)) { 220 errx(EXIT_FAILURE, "When using [-%c %s], " 221 "the %s must be numeric", *name, name, name); 222 } 223 return atoi(val); 224 } 225 226 /* resize *cpp appropriately then assign `n' chars of `s' to it */ 227 static void 228 memsave(char **cpp, const char *s, size_t n) 229 { 230 RENEW(char, *cpp, n + 1, exit(1)); 231 (void)memcpy(*cpp, s, n); 232 (*cpp)[n] = '\0'; 233 } 234 235 /* a replacement for system(3) */ 236 static int 237 asystem(const char *fmt, ...) 238 { 239 va_list vp; 240 char buf[MaxCommandLen]; 241 int ret; 242 243 va_start(vp, fmt); 244 (void)vsnprintf(buf, sizeof(buf), fmt, vp); 245 va_end(vp); 246 if (verbose) { 247 (void)printf("Command: %s\n", buf); 248 } 249 if ((ret = system(buf)) != 0) { 250 warn("Error running `%s'", buf); 251 } 252 return ret; 253 } 254 255 /* remove a users home directory, returning 1 for success (ie, no problems encountered) */ 256 static int 257 removehomedir(struct passwd *pwp) 258 { 259 struct stat st; 260 261 /* userid not root? */ 262 if (pwp->pw_uid == 0) { 263 warnx("Not deleting home directory `%s'; userid is 0", pwp->pw_dir); 264 return 0; 265 } 266 267 /* directory exists (and is a directory!) */ 268 if (stat(pwp->pw_dir, &st) < 0) { 269 warn("Cannot access home directory `%s'", pwp->pw_dir); 270 return 0; 271 } 272 if (!S_ISDIR(st.st_mode)) { 273 warnx("Home directory `%s' is not a directory", pwp->pw_dir); 274 return 0; 275 } 276 277 /* userid matches directory owner? */ 278 if (st.st_uid != pwp->pw_uid) { 279 warnx("User `%s' doesn't own directory `%s', not removed", 280 pwp->pw_name, pwp->pw_dir); 281 return 0; 282 } 283 284 (void)seteuid(pwp->pw_uid); 285 /* we add the "|| true" to keep asystem() quiet if there is a non-zero exit status. */ 286 (void)asystem("%s -rf %s > /dev/null 2>&1 || true", RM, pwp->pw_dir); 287 (void)seteuid(0); 288 if (rmdir(pwp->pw_dir) < 0) { 289 warn("Unable to remove all files in `%s'", pwp->pw_dir); 290 return 0; 291 } 292 return 1; 293 } 294 295 /* return 1 if all of `s' is numeric */ 296 static int 297 is_number(const char *s) 298 { 299 for ( ; *s ; s++) { 300 if (!isdigit((unsigned char) *s)) { 301 return 0; 302 } 303 } 304 return 1; 305 } 306 307 /* 308 * check that the effective uid is 0 - called from funcs which will 309 * modify data and config files. 310 */ 311 static void 312 checkeuid(void) 313 { 314 if (geteuid() != 0) { 315 errx(EXIT_FAILURE, "Program must be run as root"); 316 } 317 } 318 319 /* copy any dot files into the user's home directory */ 320 static int 321 copydotfiles(char *skeldir, int uid, int gid, char *dir, mode_t homeperm) 322 { 323 struct dirent *dp; 324 DIR *dirp; 325 int n; 326 327 if ((dirp = opendir(skeldir)) == NULL) { 328 warn("Can't open source . files dir `%s'", skeldir); 329 return 0; 330 } 331 for (n = 0; (dp = readdir(dirp)) != NULL && n == 0 ; ) { 332 if (strcmp(dp->d_name, ".") == 0 || 333 strcmp(dp->d_name, "..") == 0) { 334 continue; 335 } 336 n = 1; 337 } 338 (void)closedir(dirp); 339 if (n == 0) { 340 warnx("No \"dot\" initialisation files found"); 341 } else { 342 (void)asystem("cd %s && %s -rw -pe %s . %s", 343 skeldir, PAX, (verbose) ? "-v" : "", dir); 344 } 345 (void)asystem("%s -R -h %d:%d %s", CHOWN, uid, gid, dir); 346 (void)asystem("%s -R u+w %s", CHMOD, dir); 347 #ifdef EXTENSIONS 348 (void)asystem("%s 0%o %s", CHMOD, homeperm, dir); 349 #endif 350 return n; 351 } 352 353 /* create a group entry with gid `gid' */ 354 static int 355 creategid(char *group, int gid, const char *name) 356 { 357 struct stat st; 358 FILE *from; 359 FILE *to; 360 char buf[MaxEntryLen]; 361 char f[MaxFileNameLen]; 362 int fd; 363 int cc; 364 365 if (getgrnam(group) != NULL) { 366 warnx("Can't create group `%s': already exists", group); 367 return 0; 368 } 369 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 370 warn("Can't create group `%s': can't open `%s'", name, 371 _PATH_GROUP); 372 return 0; 373 } 374 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 375 warn("Can't lock `%s'", _PATH_GROUP); 376 (void)fclose(from); 377 return 0; 378 } 379 (void)fstat(fileno(from), &st); 380 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 381 if ((fd = mkstemp(f)) < 0) { 382 warn("Can't create group `%s': mkstemp failed", group); 383 (void)fclose(from); 384 return 0; 385 } 386 if ((to = fdopen(fd, "w")) == NULL) { 387 warn("Can't create group `%s': fdopen `%s' failed", 388 group, f); 389 (void)fclose(from); 390 (void)close(fd); 391 (void)unlink(f); 392 return 0; 393 } 394 while ((cc = fread(buf, sizeof(char), sizeof(buf), from)) > 0) { 395 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 396 warn("Can't create group `%s': short write to `%s'", 397 group, f); 398 (void)fclose(from); 399 (void)close(fd); 400 (void)unlink(f); 401 return 0; 402 } 403 } 404 (void)fprintf(to, "%s:*:%d:%s\n", group, gid, name); 405 (void)fclose(from); 406 (void)fclose(to); 407 if (rename(f, _PATH_GROUP) < 0) { 408 warn("Can't create group `%s': can't rename `%s' to `%s'", 409 group, f, _PATH_GROUP); 410 (void)unlink(f); 411 return 0; 412 } 413 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 414 syslog(LOG_INFO, "New group added: name=%s, gid=%d", group, gid); 415 return 1; 416 } 417 418 /* modify the group entry with name `group' to be newent */ 419 static int 420 modify_gid(char *group, char *newent) 421 { 422 struct stat st; 423 FILE *from; 424 FILE *to; 425 char buf[MaxEntryLen]; 426 char f[MaxFileNameLen]; 427 char *colon; 428 int groupc; 429 int entc; 430 int fd; 431 int cc; 432 433 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 434 warn("Can't modify group `%s': can't open `%s'", 435 group, _PATH_GROUP); 436 return 0; 437 } 438 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 439 warn("Can't modify group `%s': can't lock `%s'", 440 group, _PATH_GROUP); 441 (void)fclose(from); 442 return 0; 443 } 444 (void)fstat(fileno(from), &st); 445 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 446 if ((fd = mkstemp(f)) < 0) { 447 warn("Can't modify group `%s': mkstemp failed", group); 448 (void)fclose(from); 449 return 0; 450 } 451 if ((to = fdopen(fd, "w")) == NULL) { 452 warn("Can't modify group `%s': fdopen `%s' failed", group, f); 453 (void)fclose(from); 454 (void)close(fd); 455 (void)unlink(f); 456 return 0; 457 } 458 groupc = strlen(group); 459 while (fgets(buf, sizeof(buf), from) != NULL) { 460 cc = strlen(buf); 461 if ((colon = strchr(buf, ':')) == NULL) { 462 warnx("Badly formed entry `%s'", buf); 463 continue; 464 } 465 entc = (int)(colon - buf); 466 if (entc == groupc && 467 strncmp(group, buf, (unsigned) entc) == 0) { 468 if (newent == NULL) { 469 struct group *grp_rm; 470 struct passwd *user_pwd; 471 472 /* 473 * Check that the group being removed 474 * isn't any user's Primary group. Just 475 * warn if it is. This could cause problems 476 * if the group GID was reused for a 477 * different purpose. 478 */ 479 480 grp_rm = find_group_info(group); 481 while ((user_pwd = getpwent()) != NULL) { 482 if (user_pwd->pw_gid == grp_rm->gr_gid) { 483 warnx("Warning: group `%s'(%d)" 484 " is the primary group of" 485 " `%s'. Use caution if you" 486 " later add this GID.", 487 grp_rm->gr_name, 488 grp_rm->gr_gid, user_pwd->pw_name); 489 } 490 } 491 endpwent(); 492 continue; 493 } else { 494 cc = strlen(newent); 495 (void)strlcpy(buf, newent, sizeof(buf)); 496 } 497 } 498 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 499 warn("Can't modify group `%s': short write to `%s'", 500 group, f); 501 (void)fclose(from); 502 (void)close(fd); 503 (void)unlink(f); 504 return 0; 505 } 506 } 507 (void)fclose(from); 508 (void)fclose(to); 509 if (rename(f, _PATH_GROUP) < 0) { 510 warn("Can't modify group `%s': can't rename `%s' to `%s'", 511 group, f, _PATH_GROUP); 512 (void)unlink(f); 513 return 0; 514 } 515 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 516 if (newent == NULL) { 517 syslog(LOG_INFO, "group deleted: name=%s", group); 518 } else { 519 syslog(LOG_INFO, "group information modified: name=%s", group); 520 } 521 return 1; 522 } 523 524 /* modify the group entries for all `groups', by adding `user' */ 525 static int 526 append_group(char *user, int ngroups, const char **groups) 527 { 528 struct group *grp; 529 struct stat st; 530 FILE *from; 531 FILE *to; 532 char buf[MaxEntryLen]; 533 char f[MaxFileNameLen]; 534 char *colon; 535 int groupc; 536 int entc; 537 int fd; 538 int nc; 539 int cc; 540 int i; 541 int j; 542 543 for (i = 0 ; i < ngroups ; i++) { 544 if ((grp = getgrnam(groups[i])) == NULL) { 545 warnx("Can't append group `%s' for user `%s'", 546 groups[i], user); 547 } else { 548 for (j = 0 ; grp->gr_mem[j] ; j++) { 549 if (strcmp(user, grp->gr_mem[j]) == 0) { 550 /* already in it */ 551 groups[i] = ""; 552 } 553 } 554 } 555 } 556 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 557 warn("Can't append group(s) for `%s': can't open `%s'", 558 user, _PATH_GROUP); 559 return 0; 560 } 561 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 562 warn("Can't append group(s) for `%s': can't lock `%s'", 563 user, _PATH_GROUP); 564 (void)fclose(from); 565 return 0; 566 } 567 (void)fstat(fileno(from), &st); 568 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 569 if ((fd = mkstemp(f)) < 0) { 570 warn("Can't append group(s) for `%s': mkstemp failed", 571 user); 572 (void)fclose(from); 573 return 0; 574 } 575 if ((to = fdopen(fd, "w")) == NULL) { 576 warn("Can't append group(s) for `%s': fdopen `%s' failed", 577 user, f); 578 (void)fclose(from); 579 (void)close(fd); 580 (void)unlink(f); 581 return 0; 582 } 583 while (fgets(buf, sizeof(buf), from) != NULL) { 584 cc = strlen(buf); 585 if ((colon = strchr(buf, ':')) == NULL) { 586 warnx("Badly formed entry `%s'", buf); 587 continue; 588 } 589 entc = (int)(colon - buf); 590 for (i = 0 ; i < ngroups ; i++) { 591 if ((groupc = strlen(groups[i])) == 0) { 592 continue; 593 } 594 if (entc == groupc && 595 strncmp(groups[i], buf, (unsigned) entc) == 0) { 596 if ((nc = snprintf(&buf[cc - 1], 597 sizeof(buf) - cc + 1, "%s%s\n", 598 (buf[cc - 2] == ':') ? "" : ",", user)) < 0) { 599 warnx("Warning: group `%s' " 600 "entry too long", groups[i]); 601 } 602 cc += nc - 1; 603 } 604 } 605 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 606 warn("Can't append group(s) for `%s':" 607 " short write to `%s'", user, f); 608 (void)fclose(from); 609 (void)close(fd); 610 (void)unlink(f); 611 return 0; 612 } 613 } 614 (void)fclose(from); 615 (void)fclose(to); 616 if (rename(f, _PATH_GROUP) < 0) { 617 warn("Can't append group(s) for `%s': " 618 "can't rename `%s' to `%s'", user, f, _PATH_GROUP); 619 (void)unlink(f); 620 return 0; 621 } 622 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 623 return 1; 624 } 625 626 /* the valid characters for login and group names */ 627 #define VALID_CHAR(c) (isalnum(c) || (c) == '.' || (c) == '_' || (c) == '-') 628 629 /* return 1 if `login' is a valid login name */ 630 static int 631 valid_login(char *login_name, int allow_samba) 632 { 633 unsigned char *cp; 634 635 /* First character of a login name cannot be '-'. */ 636 if (*login_name == '-') { 637 return 0; 638 } 639 if (strlen(login_name) >= LOGIN_NAME_MAX) { 640 return 0; 641 } 642 for (cp = (unsigned char *)login_name ; *cp ; cp++) { 643 if (!VALID_CHAR(*cp)) { 644 #ifdef EXTENSIONS 645 /* check for a trailing '$' in a Samba user name */ 646 if (allow_samba && *cp == '$' && *(cp + 1) == 0x0) { 647 return 1; 648 } 649 #endif 650 return 0; 651 } 652 } 653 return 1; 654 } 655 656 /* return 1 if `group' is a valid group name */ 657 static int 658 valid_group(char *group) 659 { 660 unsigned char *cp; 661 662 for (cp = (unsigned char *)group; *cp; cp++) { 663 if (!VALID_CHAR(*cp)) { 664 return 0; 665 } 666 } 667 return 1; 668 } 669 670 /* find the next gid in the range lo .. hi */ 671 static int 672 getnextgid(int *gidp, int lo, int hi) 673 { 674 for (*gidp = lo ; *gidp < hi ; *gidp += 1) { 675 if (getgrgid((gid_t)*gidp) == NULL) { 676 return 1; 677 } 678 } 679 return 0; 680 } 681 682 #ifdef EXTENSIONS 683 /* save a range of uids */ 684 static int 685 save_range(user_t *up, char *cp) 686 { 687 int from; 688 int to; 689 int i; 690 691 if (up->u_rsize == 0) { 692 up->u_rsize = 32; 693 NEWARRAY(range_t, up->u_rv, up->u_rsize, return(0)); 694 } else if (up->u_rc == up->u_rsize) { 695 up->u_rsize *= 2; 696 RENEW(range_t, up->u_rv, up->u_rsize, return(0)); 697 } 698 if (up->u_rv && sscanf(cp, "%d..%d", &from, &to) == 2) { 699 for (i = up->u_defrc ; i < up->u_rc ; i++) { 700 if (up->u_rv[i].r_from == from && 701 up->u_rv[i].r_to == to) { 702 break; 703 } 704 } 705 if (i == up->u_rc) { 706 up->u_rv[up->u_rc].r_from = from; 707 up->u_rv[up->u_rc].r_to = to; 708 up->u_rc += 1; 709 } 710 } else { 711 warnx("Bad range `%s'", cp); 712 return 0; 713 } 714 return 1; 715 } 716 #endif 717 718 /* set the defaults in the defaults file */ 719 static int 720 setdefaults(user_t *up) 721 { 722 char template[MaxFileNameLen]; 723 FILE *fp; 724 int ret; 725 int fd; 726 #ifdef EXTENSIONS 727 int i; 728 #endif 729 730 (void)snprintf(template, sizeof(template), "%s.XXXXXX", 731 _PATH_USERMGMT_CONF); 732 if ((fd = mkstemp(template)) < 0) { 733 warn("Can't set defaults: can't mkstemp `%s' for writing", 734 _PATH_USERMGMT_CONF); 735 return 0; 736 } 737 if ((fp = fdopen(fd, "w")) == NULL) { 738 warn("Can't set defaults: can't fdopen `%s' for writing", 739 _PATH_USERMGMT_CONF); 740 return 0; 741 } 742 ret = 1; 743 if (fprintf(fp, "group\t\t%s\n", up->u_primgrp) <= 0 || 744 fprintf(fp, "base_dir\t%s\n", up->u_basedir) <= 0 || 745 fprintf(fp, "skel_dir\t%s\n", up->u_skeldir) <= 0 || 746 fprintf(fp, "shell\t\t%s\n", up->u_shell) <= 0 || 747 #ifdef EXTENSIONS 748 fprintf(fp, "class\t\t%s\n", up->u_class) <= 0 || 749 fprintf(fp, "homeperm\t0%o\n", up->u_homeperm) <= 0 || 750 #endif 751 fprintf(fp, "inactive\t%s\n", (up->u_inactive == NULL) ? 752 UNSET_INACTIVE : up->u_inactive) <= 0 || 753 fprintf(fp, "expire\t\t%s\n", (up->u_expire == NULL) ? 754 UNSET_EXPIRY : up->u_expire) <= 0 || 755 fprintf(fp, "preserve\t%s\n", (up->u_preserve == 0) ? 756 "false" : "true") <= 0) { 757 warn("Can't write to `%s'", _PATH_USERMGMT_CONF); 758 ret = 0; 759 } 760 #ifdef EXTENSIONS 761 for (i = (up->u_defrc != up->u_rc) ? up->u_defrc : 0; 762 i < up->u_rc ; i++) { 763 if (fprintf(fp, "range\t\t%d..%d\n", up->u_rv[i].r_from, 764 up->u_rv[i].r_to) <= 0) { 765 warn("Can't set defaults: can't write to `%s'", 766 _PATH_USERMGMT_CONF); 767 ret = 0; 768 } 769 } 770 #endif 771 (void)fclose(fp); 772 if (ret) { 773 ret = ((rename(template, _PATH_USERMGMT_CONF) == 0) && 774 (chmod(_PATH_USERMGMT_CONF, 0644) == 0)); 775 } 776 return ret; 777 } 778 779 /* read the defaults file */ 780 static void 781 read_defaults(user_t *up) 782 { 783 struct stat st; 784 size_t lineno; 785 size_t len; 786 FILE *fp; 787 char *cp; 788 char *s; 789 790 memsave(&up->u_primgrp, DEF_GROUP, strlen(DEF_GROUP)); 791 memsave(&up->u_basedir, DEF_BASEDIR, strlen(DEF_BASEDIR)); 792 memsave(&up->u_skeldir, DEF_SKELDIR, strlen(DEF_SKELDIR)); 793 memsave(&up->u_shell, DEF_SHELL, strlen(DEF_SHELL)); 794 memsave(&up->u_comment, DEF_COMMENT, strlen(DEF_COMMENT)); 795 #ifdef EXTENSIONS 796 memsave(&up->u_class, DEF_CLASS, strlen(DEF_CLASS)); 797 #endif 798 up->u_rsize = 16; 799 up->u_defrc = 0; 800 NEWARRAY(range_t, up->u_rv, up->u_rsize, exit(1)); 801 up->u_inactive = DEF_INACTIVE; 802 up->u_expire = DEF_EXPIRE; 803 if ((fp = fopen(_PATH_USERMGMT_CONF, "r")) == NULL) { 804 if (stat(_PATH_USERMGMT_CONF, &st) < 0 && !setdefaults(up)) { 805 warn("Can't create `%s' defaults file", 806 _PATH_USERMGMT_CONF); 807 } 808 fp = fopen(_PATH_USERMGMT_CONF, "r"); 809 } 810 if (fp != NULL) { 811 while ((s = fparseln(fp, &len, &lineno, NULL, 0)) != NULL) { 812 if (strncmp(s, "group", 5) == 0) { 813 cp = skipspace(s + 5); 814 memsave(&up->u_primgrp, (char *)cp, strlen(cp)); 815 } else if (strncmp(s, "base_dir", 8) == 0) { 816 cp = skipspace(s + 8); 817 memsave(&up->u_basedir, (char *)cp, strlen(cp)); 818 } else if (strncmp(s, "skel_dir", 8) == 0) { 819 cp = skipspace(s + 8); 820 memsave(&up->u_skeldir, (char *)cp, strlen(cp)); 821 } else if (strncmp(s, "shell", 5) == 0) { 822 cp = skipspace(s + 5); 823 memsave(&up->u_shell, cp, strlen(cp)); 824 #ifdef EXTENSIONS 825 } else if (strncmp((char *)s, "class", 5) == 0) { 826 cp = skipspace(s + 5); 827 memsave(&up->u_class, cp, strlen(cp)); 828 #endif 829 #ifdef EXTENSIONS 830 } else if (strncmp(s, "homeperm", 8) == 0) { 831 for (cp = s + 8; *cp && 832 isspace((unsigned char)*cp); cp++) 833 ; 834 up->u_homeperm = strtoul(cp, NULL, 8); 835 #endif 836 } else if (strncmp(s, "inactive", 8) == 0) { 837 cp = skipspace(s + 8); 838 if (strcmp(cp, UNSET_INACTIVE) == 0) { 839 if (up->u_inactive) { 840 FREE(up->u_inactive); 841 } 842 up->u_inactive = NULL; 843 } else { 844 memsave(&up->u_inactive, cp, strlen(cp)); 845 } 846 #ifdef EXTENSIONS 847 } else if (strncmp(s, "range", 5) == 0) { 848 cp = skipspace(s + 5); 849 (void)save_range(up, cp); 850 #endif 851 #ifdef EXTENSIONS 852 } else if (strncmp(s, "preserve", 8) == 0) { 853 cp = skipspace(s + 8); 854 up->u_preserve = 855 (strncmp(cp, "true", 4) == 0) ? 1 : 856 (strncmp(cp, "yes", 3) == 0) ? 1 : atoi(cp); 857 #endif 858 } else if (strncmp(s, "expire", 6) == 0) { 859 cp = skipspace(s + 6); 860 if (strcmp(cp, UNSET_EXPIRY) == 0) { 861 if (up->u_expire) { 862 FREE(up->u_expire); 863 } 864 up->u_expire = NULL; 865 } else { 866 memsave(&up->u_expire, cp, strlen(cp)); 867 } 868 } 869 (void)free(s); 870 } 871 (void)fclose(fp); 872 } 873 if (up->u_rc == 0) { 874 up->u_rv[up->u_rc].r_from = DEF_LOWUID; 875 up->u_rv[up->u_rc].r_to = DEF_HIGHUID; 876 up->u_rc += 1; 877 } 878 up->u_defrc = up->u_rc; 879 up->u_homeperm = DEF_HOMEPERM; 880 } 881 882 /* return the next valid unused uid */ 883 static int 884 getnextuid(int sync_uid_gid, int *uid, int low_uid, int high_uid) 885 { 886 for (*uid = low_uid ; *uid <= high_uid ; (*uid)++) { 887 if (getpwuid((uid_t)(*uid)) == NULL && *uid != NOBODY_UID) { 888 if (sync_uid_gid) { 889 if (getgrgid((gid_t)(*uid)) == NULL) { 890 return 1; 891 } 892 } else { 893 return 1; 894 } 895 } 896 } 897 return 0; 898 } 899 900 /* structure which defines a password type */ 901 typedef struct passwd_type_t { 902 const char *type; /* optional type descriptor */ 903 size_t desc_length; /* length of type descriptor */ 904 size_t length; /* length of password */ 905 const char *regex; /* regexp to output the password */ 906 size_t re_sub; /* subscript of regexp to use */ 907 } passwd_type_t; 908 909 static passwd_type_t passwd_types[] = { 910 { "$sha1", 5, 28, "\\$[^$]+\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* SHA1 */ 911 { "$2a", 3, 54, "\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* Blowfish */ 912 { "$1", 2, 34, NULL, 0 }, /* MD5 */ 913 { "", 0, DES_Len,NULL, 0 }, /* standard DES */ 914 { NULL, (size_t)~0, (size_t)~0, NULL, 0 } 915 /* none - terminate search */ 916 }; 917 918 /* return non-zero if it's a valid password - check length for cipher type */ 919 static int 920 valid_password_length(char *newpasswd) 921 { 922 passwd_type_t *pwtp; 923 regmatch_t matchv[10]; 924 regex_t r; 925 926 for (pwtp = passwd_types; pwtp->desc_length != (size_t)~0; pwtp++) { 927 if (strncmp(newpasswd, pwtp->type, pwtp->desc_length) == 0) { 928 if (pwtp->regex == NULL) { 929 return strlen(newpasswd) == pwtp->length; 930 } 931 (void)regcomp(&r, pwtp->regex, REG_EXTENDED); 932 if (regexec(&r, newpasswd, 10, matchv, 0) == 0) { 933 regfree(&r); 934 return (int)(matchv[pwtp->re_sub].rm_eo - 935 matchv[pwtp->re_sub].rm_so + 1) == 936 pwtp->length; 937 } 938 regfree(&r); 939 } 940 } 941 return 0; 942 } 943 944 #ifdef EXTENSIONS 945 /* return 1 if `class' is a valid login class */ 946 static int 947 valid_class(char *class) 948 { 949 login_cap_t *lc; 950 951 if (class == NULL || *class == '\0') { 952 return 1; 953 } 954 /* 955 * Check if /etc/login.conf exists. login_getclass() will 956 * return 1 due to it not existing, so not informing the 957 * user the actual login class does not exist. 958 */ 959 960 if (access(PATH_LOGINCONF, R_OK) == -1) { 961 warn("Access failed for `%s'; will not validate class `%s'", 962 PATH_LOGINCONF, class); 963 return 1; 964 } 965 966 if ((lc = login_getclass(class)) != NULL) { 967 login_close(lc); 968 return 1; 969 } 970 return 0; 971 } 972 973 /* return 1 if the `shellname' is a valid user shell */ 974 static int 975 valid_shell(const char *shellname) 976 { 977 char *shellp; 978 979 if (access(_PATH_SHELLS, R_OK) == -1) { 980 /* Don't exit */ 981 warn("Access failed for `%s'; will not validate shell `%s'", 982 _PATH_SHELLS, shellname); 983 return 1; 984 } 985 986 /* if nologin is used as a shell, consider it a valid shell */ 987 if (strcmp(shellname, NOLOGIN) == 0) 988 return 1; 989 990 while ((shellp = getusershell()) != NULL) 991 if (strcmp(shellp, shellname) == 0) 992 return 1; 993 994 warnx("Shell `%s' not found in `%s'", shellname, _PATH_SHELLS); 995 996 return access(shellname, X_OK) != -1; 997 } 998 #endif 999 1000 /* look for a valid time, return 0 if it was specified but bad */ 1001 static int 1002 scantime(time_t *tp, char *s) 1003 { 1004 struct tm tm; 1005 char *ep; 1006 long val; 1007 1008 *tp = 0; 1009 if (s != NULL) { 1010 (void)memset(&tm, 0, sizeof(tm)); 1011 if (strptime(s, "%c", &tm) != NULL) { 1012 *tp = mktime(&tm); 1013 return (*tp == -1) ? 0 : 1; 1014 } else if (strptime(s, "%B %d %Y", &tm) != NULL) { 1015 *tp = mktime(&tm); 1016 return (*tp == -1) ? 0 : 1; 1017 } else { 1018 errno = 0; 1019 *tp = val = strtol(s, &ep, 10); 1020 if (*ep != '\0' || *tp < -1 || errno == ERANGE) { 1021 *tp = 0; 1022 return 0; 1023 } 1024 if (*tp != val) { 1025 return 0; 1026 } 1027 } 1028 } 1029 return 1; 1030 } 1031 1032 /* add a user */ 1033 static int 1034 adduser(char *login_name, user_t *up) 1035 { 1036 struct group *grp; 1037 struct stat st; 1038 time_t expire; 1039 time_t inactive; 1040 char password[PasswordLength + 1]; 1041 char home[MaxFileNameLen]; 1042 char buf[MaxFileNameLen]; 1043 int sync_uid_gid; 1044 int masterfd; 1045 int ptmpfd; 1046 int gid; 1047 int cc; 1048 int i; 1049 1050 if (!valid_login(login_name, up->u_allow_samba)) { 1051 errx(EXIT_FAILURE, "Can't add user `%s': invalid login name", login_name); 1052 } 1053 #ifdef EXTENSIONS 1054 if (!valid_class(up->u_class)) { 1055 errx(EXIT_FAILURE, "Can't add user `%s': no such login class `%s'", 1056 login_name, up->u_class); 1057 } 1058 #endif 1059 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1060 err(EXIT_FAILURE, "Can't add user `%s': can't open `%s'", 1061 login_name, _PATH_MASTERPASSWD); 1062 } 1063 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1064 err(EXIT_FAILURE, "Can't add user `%s': can't lock `%s'", 1065 login_name, _PATH_MASTERPASSWD); 1066 } 1067 pw_init(); 1068 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1069 int serrno = errno; 1070 (void)close(masterfd); 1071 errno = serrno; 1072 err(EXIT_FAILURE, "Can't add user `%s': can't obtain pw_lock", 1073 login_name); 1074 } 1075 while ((cc = read(masterfd, buf, sizeof(buf))) > 0) { 1076 if (write(ptmpfd, buf, (size_t)(cc)) != cc) { 1077 int serrno = errno; 1078 (void)close(masterfd); 1079 (void)close(ptmpfd); 1080 (void)pw_abort(); 1081 errno = serrno; 1082 err(EXIT_FAILURE, "Can't add user `%s': " 1083 "short write to /etc/ptmp", login_name); 1084 } 1085 } 1086 /* if no uid was specified, get next one in [low_uid..high_uid] range */ 1087 sync_uid_gid = (strcmp(up->u_primgrp, "=uid") == 0); 1088 if (up->u_uid == -1) { 1089 int got_id = 0; 1090 1091 /* 1092 * Look for a free UID in the command line ranges (if any). 1093 * These start after the ranges specified in the config file. 1094 */ 1095 for (i = up->u_defrc; !got_id && i < up->u_rc ; i++) { 1096 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1097 up->u_rv[i].r_from, up->u_rv[i].r_to); 1098 } 1099 /* 1100 * If there were no free UIDs in the command line ranges, 1101 * try the ranges from the config file (there will always 1102 * be at least one default). 1103 */ 1104 for (i = 0; !got_id && i < up->u_defrc; i++) { 1105 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1106 up->u_rv[i].r_from, up->u_rv[i].r_to); 1107 } 1108 if (!got_id) { 1109 (void)close(ptmpfd); 1110 (void)pw_abort(); 1111 errx(EXIT_FAILURE, "Can't add user `%s': " 1112 "can't get next uid for %d", login_name, 1113 up->u_uid); 1114 } 1115 } 1116 /* check uid isn't already allocated */ 1117 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1118 (void)close(ptmpfd); 1119 (void)pw_abort(); 1120 errx(EXIT_FAILURE, "Can't add user `%s': " 1121 "uid %d is already in use", login_name, up->u_uid); 1122 } 1123 /* if -g=uid was specified, check gid is unused */ 1124 if (sync_uid_gid) { 1125 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1126 (void)close(ptmpfd); 1127 (void)pw_abort(); 1128 errx(EXIT_FAILURE, "Can't add user `%s': " 1129 "gid %d is already in use", login_name, 1130 up->u_uid); 1131 } 1132 gid = up->u_uid; 1133 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1134 gid = grp->gr_gid; 1135 } else if (is_number(up->u_primgrp) && 1136 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1137 gid = grp->gr_gid; 1138 } else { 1139 (void)close(ptmpfd); 1140 (void)pw_abort(); 1141 errx(EXIT_FAILURE, "Can't add user `%s': group %s not found", 1142 login_name, up->u_primgrp); 1143 } 1144 /* check name isn't already in use */ 1145 if (!(up->u_flags & F_DUPUID) && getpwnam(login_name) != NULL) { 1146 (void)close(ptmpfd); 1147 (void)pw_abort(); 1148 errx(EXIT_FAILURE, "Can't add user `%s': " 1149 "`%s' is already a user", login_name, login_name); 1150 } 1151 if (up->u_flags & F_HOMEDIR) { 1152 (void)strlcpy(home, up->u_home, sizeof(home)); 1153 } else { 1154 /* if home directory hasn't been given, make it up */ 1155 (void)snprintf(home, sizeof(home), "%s/%s", up->u_basedir, 1156 login_name); 1157 } 1158 if (up->u_flags & F_SHELL) { 1159 #ifdef EXTENSIONS 1160 if (!valid_shell(up->u_shell)) { 1161 int oerrno = errno; 1162 (void)close(ptmpfd); 1163 (void)pw_abort(); 1164 errno = oerrno; 1165 errx(EXIT_FAILURE, "Can't add user `%s': " 1166 "Cannot access shell `%s'", 1167 login_name, up->u_shell); 1168 } 1169 #endif 1170 } 1171 1172 if (!scantime(&inactive, up->u_inactive)) { 1173 warnx("Warning: inactive time `%s' invalid, password expiry off", 1174 up->u_inactive); 1175 } 1176 if (!scantime(&expire, up->u_expire) || expire == -1) { 1177 warnx("Warning: expire time `%s' invalid, account expiry off", 1178 up->u_expire); 1179 expire = 0; /* Just in case. */ 1180 } 1181 if (lstat(home, &st) < 0 && !(up->u_flags & F_MKDIR)) { 1182 warnx("Warning: home directory `%s' doesn't exist, " 1183 "and -m was not specified", home); 1184 } 1185 password[sizeof(password) - 1] = '\0'; 1186 if (up->u_password != NULL && valid_password_length(up->u_password)) { 1187 (void)strlcpy(password, up->u_password, sizeof(password)); 1188 } else { 1189 (void)memset(password, '*', DES_Len); 1190 password[DES_Len] = 0; 1191 if (up->u_password != NULL) { 1192 warnx("Password `%s' is invalid: setting it to `%s'", 1193 up->u_password, password); 1194 } 1195 } 1196 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1197 login_name, 1198 password, 1199 up->u_uid, 1200 gid, 1201 #ifdef EXTENSIONS 1202 up->u_class, 1203 #else 1204 "", 1205 #endif 1206 (long) inactive, 1207 (long) expire, 1208 up->u_comment, 1209 home, 1210 up->u_shell); 1211 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1212 int serrno = errno; 1213 (void)close(ptmpfd); 1214 (void)pw_abort(); 1215 errno = serrno; 1216 err(EXIT_FAILURE, "Can't add user `%s': write failed", 1217 login_name); 1218 } 1219 if (up->u_flags & F_MKDIR) { 1220 if (lstat(home, &st) == 0) { 1221 (void)close(ptmpfd); 1222 (void)pw_abort(); 1223 errx(EXIT_FAILURE, 1224 "Can't add user `%s': home directory `%s' " 1225 "already exists", login_name, home); 1226 } else { 1227 if (asystem("%s -p %s", MKDIR, home) != 0) { 1228 (void)close(ptmpfd); 1229 (void)pw_abort(); 1230 errx(EXIT_FAILURE, "Can't add user `%s': " 1231 "can't mkdir `%s'", login_name, home); 1232 } 1233 (void)copydotfiles(up->u_skeldir, up->u_uid, gid, home, 1234 up->u_homeperm); 1235 } 1236 } 1237 if (strcmp(up->u_primgrp, "=uid") == 0 && 1238 getgrnam(login_name) == NULL && 1239 !creategid(login_name, gid, login_name)) { 1240 (void)close(ptmpfd); 1241 (void)pw_abort(); 1242 errx(EXIT_FAILURE, "Can't add user `%s': can't create gid %d ", 1243 login_name, gid); 1244 } 1245 if (up->u_groupc > 0 && 1246 !append_group(login_name, up->u_groupc, up->u_groupv)) { 1247 (void)close(ptmpfd); 1248 (void)pw_abort(); 1249 errx(EXIT_FAILURE, "Can't add user `%s': can't append " 1250 "to new groups", login_name); 1251 } 1252 (void)close(ptmpfd); 1253 #if PW_MKDB_ARGC == 2 1254 if (pw_mkdb(login_name, 0) < 0) 1255 #else 1256 if (pw_mkdb() < 0) 1257 #endif 1258 { 1259 (void)pw_abort(); 1260 errx(EXIT_FAILURE, "Can't add user `%s': pw_mkdb failed", 1261 login_name); 1262 } 1263 syslog(LOG_INFO, "New user added: name=%s, uid=%d, gid=%d, home=%s, " 1264 "shell=%s", login_name, up->u_uid, gid, home, up->u_shell); 1265 return 1; 1266 } 1267 1268 /* remove a user from the groups file */ 1269 static int 1270 rm_user_from_groups(char *login_name) 1271 { 1272 struct stat st; 1273 regmatch_t matchv[10]; 1274 regex_t r; 1275 FILE *from; 1276 FILE *to; 1277 char line[MaxEntryLen]; 1278 char buf[MaxEntryLen]; 1279 char f[MaxFileNameLen]; 1280 int fd; 1281 int cc; 1282 int sc; 1283 1284 (void)snprintf(line, sizeof(line), "(:|,)(%s)(,|$)", login_name); 1285 if ((sc = regcomp(&r, line, REG_EXTENDED|REG_NEWLINE)) != 0) { 1286 (void)regerror(sc, &r, buf, sizeof(buf)); 1287 warnx("Can't compile regular expression `%s' (%s)", line, 1288 buf); 1289 return 0; 1290 } 1291 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 1292 warn("Can't remove user `%s' from `%s': can't open `%s'", 1293 login_name, _PATH_GROUP, _PATH_GROUP); 1294 return 0; 1295 } 1296 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 1297 warn("Can't remove user `%s' from `%s': can't lock `%s'", 1298 login_name, _PATH_GROUP, _PATH_GROUP); 1299 (void)fclose(from); 1300 return 0; 1301 } 1302 (void)fstat(fileno(from), &st); 1303 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 1304 if ((fd = mkstemp(f)) < 0) { 1305 warn("Can't remove user `%s' from `%s': mkstemp failed", 1306 login_name, _PATH_GROUP); 1307 (void)fclose(from); 1308 return 0; 1309 } 1310 if ((to = fdopen(fd, "w")) == NULL) { 1311 warn("Can't remove user `%s' from `%s': fdopen `%s' failed", 1312 login_name, _PATH_GROUP, f); 1313 (void)fclose(from); 1314 (void)close(fd); 1315 (void)unlink(f); 1316 return 0; 1317 } 1318 while (fgets(buf, sizeof(buf), from) != NULL) { 1319 cc = strlen(buf); 1320 if (regexec(&r, buf, 10, matchv, 0) == 0) { 1321 if (buf[(int)matchv[1].rm_so] == ',') { 1322 matchv[2].rm_so = matchv[1].rm_so; 1323 } else if (matchv[2].rm_eo != matchv[3].rm_eo) { 1324 matchv[2].rm_eo = matchv[3].rm_eo; 1325 } 1326 cc -= (int) matchv[2].rm_eo; 1327 sc = (int) matchv[2].rm_so; 1328 if (fwrite(buf, sizeof(char), (size_t)sc, to) != sc || 1329 fwrite(&buf[(int)matchv[2].rm_eo], sizeof(char), 1330 (size_t)cc, to) != cc) { 1331 warn("Can't remove user `%s' from `%s': " 1332 "short write to `%s'", login_name, 1333 _PATH_GROUP, f); 1334 (void)fclose(from); 1335 (void)close(fd); 1336 (void)unlink(f); 1337 return 0; 1338 } 1339 } else if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 1340 warn("Can't remove user `%s' from `%s': " 1341 "short write to `%s'", login_name, _PATH_GROUP, f); 1342 (void)fclose(from); 1343 (void)close(fd); 1344 (void)unlink(f); 1345 return 0; 1346 } 1347 } 1348 (void)fclose(from); 1349 (void)fclose(to); 1350 if (rename(f, _PATH_GROUP) < 0) { 1351 warn("Can't remove user `%s' from `%s': " 1352 "can't rename `%s' to `%s'", 1353 login_name, _PATH_GROUP, f, _PATH_GROUP); 1354 (void)unlink(f); 1355 return 0; 1356 } 1357 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 1358 return 1; 1359 } 1360 1361 /* check that the user or group is local, not from YP/NIS */ 1362 static int 1363 is_local(char *name, const char *file) 1364 { 1365 FILE *fp; 1366 char buf[MaxEntryLen]; 1367 size_t len; 1368 int ret; 1369 1370 if ((fp = fopen(file, "r")) == NULL) { 1371 err(EXIT_FAILURE, "Can't open `%s'", file); 1372 } 1373 len = strlen(name); 1374 for (ret = 0 ; fgets(buf, sizeof(buf), fp) != NULL ; ) { 1375 if (strncmp(buf, name, len) == 0 && buf[len] == ':') { 1376 ret = 1; 1377 break; 1378 } 1379 } 1380 (void)fclose(fp); 1381 return ret; 1382 } 1383 1384 /* modify a user */ 1385 static int 1386 moduser(char *login_name, char *newlogin, user_t *up, int allow_samba) 1387 { 1388 struct passwd *pwp, pw; 1389 struct group *grp; 1390 const char *homedir; 1391 char *locked_pwd; 1392 size_t colonc; 1393 size_t loginc; 1394 size_t len; 1395 FILE *master; 1396 char newdir[MaxFileNameLen]; 1397 char buf[MaxEntryLen]; 1398 char pwbuf[MaxEntryLen]; 1399 char *colon; 1400 int masterfd; 1401 int ptmpfd; 1402 int error; 1403 1404 if (!valid_login(newlogin, allow_samba)) { 1405 errx(EXIT_FAILURE, "Can't modify user `%s': invalid login name", 1406 login_name); 1407 } 1408 if (getpwnam_r(login_name, &pw, pwbuf, sizeof(pwbuf), &pwp) != 0 1409 || pwp == NULL) { 1410 errx(EXIT_FAILURE, "Can't modify user `%s': no such user", 1411 login_name); 1412 } 1413 if (!is_local(login_name, _PATH_MASTERPASSWD)) { 1414 errx(EXIT_FAILURE, "Can't modify user `%s': must be a local user", 1415 login_name); 1416 } 1417 /* keep dir name in case we need it for '-m' */ 1418 homedir = pwp->pw_dir; 1419 1420 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1421 err(EXIT_FAILURE, "Can't modify user `%s': can't open `%s'", 1422 login_name, _PATH_MASTERPASSWD); 1423 } 1424 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1425 err(EXIT_FAILURE, "Can't modify user `%s': can't lock `%s'", 1426 login_name, _PATH_MASTERPASSWD); 1427 } 1428 pw_init(); 1429 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1430 int serrno = errno; 1431 (void)close(masterfd); 1432 errno = serrno; 1433 err(EXIT_FAILURE, "Can't modify user `%s': " 1434 "can't obtain pw_lock", login_name); 1435 } 1436 if ((master = fdopen(masterfd, "r")) == NULL) { 1437 int serrno = errno; 1438 (void)close(masterfd); 1439 (void)close(ptmpfd); 1440 (void)pw_abort(); 1441 errno = serrno; 1442 err(EXIT_FAILURE, "Can't modify user `%s': " 1443 "fdopen fd for %s", login_name, _PATH_MASTERPASSWD); 1444 } 1445 if (up != NULL) { 1446 if (up->u_flags & F_USERNAME) { 1447 /* 1448 * If changing name, 1449 * check new name isn't already in use 1450 */ 1451 if (strcmp(login_name, newlogin) != 0 && 1452 getpwnam(newlogin) != NULL) { 1453 (void)close(ptmpfd); 1454 (void)pw_abort(); 1455 errx(EXIT_FAILURE, "Can't modify user `%s': " 1456 "`%s' is already a user", login_name, 1457 newlogin); 1458 } 1459 pwp->pw_name = newlogin; 1460 1461 /* 1462 * Provide a new directory name in case the 1463 * home directory is to be moved. 1464 */ 1465 if (up->u_flags & F_MKDIR) { 1466 (void)snprintf(newdir, sizeof(newdir), "%s/%s", 1467 up->u_basedir, newlogin); 1468 pwp->pw_dir = newdir; 1469 } 1470 } 1471 if (up->u_flags & F_PASSWORD) { 1472 if (up->u_password != NULL) { 1473 if (!valid_password_length(up->u_password)) { 1474 (void)close(ptmpfd); 1475 (void)pw_abort(); 1476 errx(EXIT_FAILURE, 1477 "Can't modify user `%s': " 1478 "invalid password: `%s'", 1479 login_name, up->u_password); 1480 } 1481 if ((locked_pwd = 1482 strstr(pwp->pw_passwd, LOCKED)) != NULL) { 1483 /* 1484 * account is locked - keep it locked 1485 * and just change the password. 1486 */ 1487 if (asprintf(&locked_pwd, "%s%s", 1488 LOCKED, up->u_password) == -1) { 1489 (void)close(ptmpfd); 1490 (void)pw_abort(); 1491 err(EXIT_FAILURE, 1492 "Can't modify user `%s': " 1493 "asprintf failed", 1494 login_name); 1495 } 1496 pwp->pw_passwd = locked_pwd; 1497 } else { 1498 pwp->pw_passwd = up->u_password; 1499 } 1500 } 1501 } 1502 1503 /* check whether we should lock the account. */ 1504 if (up->u_locked == LOCK) { 1505 /* check to see account if already locked. */ 1506 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1507 != NULL) { 1508 warnx("Account is already locked"); 1509 } else { 1510 if (asprintf(&locked_pwd, "%s%s", LOCKED, 1511 pwp->pw_passwd) == -1) { 1512 (void)close(ptmpfd); 1513 (void)pw_abort(); 1514 err(EXIT_FAILURE, 1515 "Can't modify user `%s': " 1516 "asprintf failed", login_name); 1517 } 1518 pwp->pw_passwd = locked_pwd; 1519 } 1520 } else if (up->u_locked == UNLOCK) { 1521 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1522 == NULL) { 1523 warnx("Can't modify user `%s': " 1524 "account is not locked", login_name); 1525 } else { 1526 pwp->pw_passwd = locked_pwd + strlen(LOCKED); 1527 } 1528 } 1529 1530 if (up->u_flags & F_UID) { 1531 /* check uid isn't already allocated */ 1532 if (!(up->u_flags & F_DUPUID) && 1533 getpwuid((uid_t)(up->u_uid)) != NULL) { 1534 (void)close(ptmpfd); 1535 (void)pw_abort(); 1536 errx(EXIT_FAILURE, "Can't modify user `%s': " 1537 "uid `%d' is already in use", login_name, 1538 up->u_uid); 1539 } 1540 pwp->pw_uid = up->u_uid; 1541 } 1542 if (up->u_flags & F_GROUP) { 1543 /* if -g=uid was specified, check gid is unused */ 1544 if (strcmp(up->u_primgrp, "=uid") == 0) { 1545 if (getgrgid((gid_t)(pwp->pw_uid)) != NULL) { 1546 (void)close(ptmpfd); 1547 (void)pw_abort(); 1548 errx(EXIT_FAILURE, 1549 "Can't modify user `%s': " 1550 "gid %d is already in use", 1551 login_name, up->u_uid); 1552 } 1553 pwp->pw_gid = pwp->pw_uid; 1554 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1555 pwp->pw_gid = grp->gr_gid; 1556 } else if (is_number(up->u_primgrp) && 1557 (grp = getgrgid( 1558 (gid_t)atoi(up->u_primgrp))) != NULL) { 1559 pwp->pw_gid = grp->gr_gid; 1560 } else { 1561 (void)close(ptmpfd); 1562 (void)pw_abort(); 1563 errx(EXIT_FAILURE, "Can't modify user `%s': " 1564 "group %s not found", login_name, 1565 up->u_primgrp); 1566 } 1567 } 1568 if (up->u_flags & F_INACTIVE) { 1569 if (!scantime(&pwp->pw_change, up->u_inactive)) { 1570 warnx("Warning: inactive time `%s' invalid, " 1571 "password expiry off", 1572 up->u_inactive); 1573 } 1574 } 1575 if (up->u_flags & F_EXPIRE) { 1576 if (!scantime(&pwp->pw_expire, up->u_expire) || 1577 pwp->pw_expire == -1) { 1578 warnx("Warning: expire time `%s' invalid, " 1579 "account expiry off", 1580 up->u_expire); 1581 pwp->pw_expire = 0; 1582 } 1583 } 1584 if (up->u_flags & F_COMMENT) { 1585 pwp->pw_gecos = up->u_comment; 1586 } 1587 if (up->u_flags & F_HOMEDIR) { 1588 pwp->pw_dir = up->u_home; 1589 } 1590 if (up->u_flags & F_SHELL) { 1591 #ifdef EXTENSIONS 1592 if (!valid_shell(up->u_shell)) { 1593 int oerrno = errno; 1594 (void)close(ptmpfd); 1595 (void)pw_abort(); 1596 errno = oerrno; 1597 errx(EXIT_FAILURE, "Can't modify user `%s': " 1598 "Cannot access shell `%s'", 1599 login_name, up->u_shell); 1600 } 1601 pwp->pw_shell = up->u_shell; 1602 #else 1603 pwp->pw_shell = up->u_shell; 1604 #endif 1605 } 1606 #ifdef EXTENSIONS 1607 if (up->u_flags & F_CLASS) { 1608 if (!valid_class(up->u_class)) { 1609 (void)close(ptmpfd); 1610 (void)pw_abort(); 1611 errx(EXIT_FAILURE, "Can't modify user `%s': " 1612 "no such login class `%s'", login_name, 1613 up->u_class); 1614 } 1615 pwp->pw_class = up->u_class; 1616 } 1617 #endif 1618 } 1619 loginc = strlen(login_name); 1620 while (fgets(buf, sizeof(buf), master) != NULL) { 1621 if ((colon = strchr(buf, ':')) == NULL) { 1622 warnx("Malformed entry `%s'. Skipping", buf); 1623 continue; 1624 } 1625 colonc = (size_t)(colon - buf); 1626 if (strncmp(login_name, buf, loginc) == 0 && loginc == colonc) { 1627 if (up != NULL) { 1628 len = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:" 1629 #ifdef EXTENSIONS 1630 "%s" 1631 #endif 1632 ":%ld:%ld:%s:%s:%s\n", 1633 newlogin, 1634 pwp->pw_passwd, 1635 pwp->pw_uid, 1636 pwp->pw_gid, 1637 #ifdef EXTENSIONS 1638 pwp->pw_class, 1639 #endif 1640 (long)pwp->pw_change, 1641 (long)pwp->pw_expire, 1642 pwp->pw_gecos, 1643 pwp->pw_dir, 1644 pwp->pw_shell); 1645 if (write(ptmpfd, buf, len) != len) { 1646 int serrno = errno; 1647 (void)close(ptmpfd); 1648 (void)pw_abort(); 1649 errno = serrno; 1650 err(EXIT_FAILURE, "Can't modify user " 1651 "`%s': write", login_name); 1652 } 1653 } 1654 } else { 1655 len = strlen(buf); 1656 if (write(ptmpfd, buf, len) != len) { 1657 int serrno = errno; 1658 (void)close(masterfd); 1659 (void)close(ptmpfd); 1660 (void)pw_abort(); 1661 errno = serrno; 1662 err(EXIT_FAILURE, "Can't modify `%s': " 1663 "write", login_name); 1664 } 1665 } 1666 } 1667 if (up != NULL) { 1668 if ((up->u_flags & F_MKDIR) && 1669 asystem("%s %s %s", MV, homedir, pwp->pw_dir) != 0) { 1670 (void)close(ptmpfd); 1671 (void)pw_abort(); 1672 errx(EXIT_FAILURE, "Can't modify user `%s': " 1673 "can't move `%s' to `%s'", 1674 login_name, homedir, pwp->pw_dir); 1675 } 1676 if (up->u_groupc > 0 && 1677 !append_group(newlogin, up->u_groupc, up->u_groupv)) { 1678 (void)close(ptmpfd); 1679 (void)pw_abort(); 1680 errx(EXIT_FAILURE, "Can't modify user `%s': " 1681 "can't append `%s' to new groups", 1682 login_name, newlogin); 1683 } 1684 } 1685 (void)close(ptmpfd); 1686 (void)fclose(master); 1687 #if PW_MKDB_ARGC == 2 1688 if (up != NULL && strcmp(login_name, newlogin) == 0) { 1689 error = pw_mkdb(login_name, 0); 1690 } else { 1691 error = pw_mkdb(NULL, 0); 1692 } 1693 #else 1694 error = pw_mkdb(); 1695 #endif 1696 if (error < 0) { 1697 (void)pw_abort(); 1698 errx(EXIT_FAILURE, "Can't modify user `%s': pw_mkdb failed", 1699 login_name); 1700 } 1701 if (up == NULL) { 1702 syslog(LOG_INFO, "User removed: name=%s", login_name); 1703 } else if (strcmp(login_name, newlogin) == 0) { 1704 syslog(LOG_INFO, "User information modified: name=%s, uid=%d, " 1705 "gid=%d, home=%s, shell=%s", 1706 login_name, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, 1707 pwp->pw_shell); 1708 } else { 1709 syslog(LOG_INFO, "User information modified: name=%s, " 1710 "new name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1711 login_name, newlogin, pwp->pw_uid, pwp->pw_gid, 1712 pwp->pw_dir, pwp->pw_shell); 1713 } 1714 return 1; 1715 } 1716 1717 #ifdef EXTENSIONS 1718 /* see if we can find out the user struct */ 1719 static struct passwd * 1720 find_user_info(const char *name) 1721 { 1722 struct passwd *pwp; 1723 1724 if ((pwp = getpwnam(name)) != NULL) { 1725 return pwp; 1726 } 1727 if (is_number(name) && (pwp = getpwuid((uid_t)atoi(name))) != NULL) { 1728 return pwp; 1729 } 1730 return NULL; 1731 } 1732 #endif 1733 1734 /* see if we can find out the group struct */ 1735 static struct group * 1736 find_group_info(const char *name) 1737 { 1738 struct group *grp; 1739 1740 if ((grp = getgrnam(name)) != NULL) { 1741 return grp; 1742 } 1743 if (is_number(name) && (grp = getgrgid((gid_t)atoi(name))) != NULL) { 1744 return grp; 1745 } 1746 return NULL; 1747 } 1748 1749 /* print out usage message, and then exit */ 1750 void 1751 usermgmt_usage(const char *prog) 1752 { 1753 if (strcmp(prog, "useradd") == 0) { 1754 (void)fprintf(stderr, "usage: %s -D [-F] [-b base-dir] " 1755 "[-e expiry-time] [-f inactive-time]\n" 1756 "\t[-g gid | name | =uid] [-k skel-dir] [-L login-class]\n" 1757 "\t[-M homeperm] [-r lowuid..highuid] [-s shell]\n", prog); 1758 (void)fprintf(stderr, "usage: %s [-moSv] [-b base-dir] " 1759 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1760 "\t[-f inactive-time] [-G secondary-group] " 1761 "[-g gid | name | =uid]\n" 1762 "\t[-k skeletondir] [-L login-class] [-M homeperm] " 1763 "[-p password]\n" 1764 "\t[-r lowuid..highuid] [-s shell] [-u uid] user\n", 1765 prog); 1766 } else if (strcmp(prog, "usermod") == 0) { 1767 (void)fprintf(stderr, "usage: %s [-FmoSv] [-C yes/no] " 1768 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1769 "\t[-f inactive] [-G secondary-group] " 1770 "[-g gid | name | =uid]\n" 1771 "\t[-L login-class] [-l new-login] [-p password] " 1772 "[-s shell] [-u uid]\n" 1773 "\tuser\n", prog); 1774 } else if (strcmp(prog, "userdel") == 0) { 1775 (void)fprintf(stderr, "usage: %s -D [-p preserve-value]\n", prog); 1776 (void)fprintf(stderr, 1777 "usage: %s [-rSv] [-p preserve-value] user\n", prog); 1778 #ifdef EXTENSIONS 1779 } else if (strcmp(prog, "userinfo") == 0) { 1780 (void)fprintf(stderr, "usage: %s [-e] user\n", prog); 1781 #endif 1782 } else if (strcmp(prog, "groupadd") == 0) { 1783 (void)fprintf(stderr, "usage: %s [-ov] [-g gid]" 1784 " [-r lowgid..highgid] group\n", prog); 1785 } else if (strcmp(prog, "groupdel") == 0) { 1786 (void)fprintf(stderr, "usage: %s [-v] group\n", prog); 1787 } else if (strcmp(prog, "groupmod") == 0) { 1788 (void)fprintf(stderr, 1789 "usage: %s [-ov] [-g gid] [-n newname] group\n", prog); 1790 } else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) { 1791 (void)fprintf(stderr, 1792 "usage: %s ( add | del | mod | info ) ...\n", prog); 1793 #ifdef EXTENSIONS 1794 } else if (strcmp(prog, "groupinfo") == 0) { 1795 (void)fprintf(stderr, "usage: %s [-ev] group\n", prog); 1796 #endif 1797 } 1798 exit(EXIT_FAILURE); 1799 /* NOTREACHED */ 1800 } 1801 1802 #ifdef EXTENSIONS 1803 #define ADD_OPT_EXTENSIONS "M:p:r:vL:S" 1804 #else 1805 #define ADD_OPT_EXTENSIONS 1806 #endif 1807 1808 int 1809 useradd(int argc, char **argv) 1810 { 1811 user_t u; 1812 int defaultfield; 1813 int bigD; 1814 int c; 1815 #ifdef EXTENSIONS 1816 int i; 1817 #endif 1818 1819 (void)memset(&u, 0, sizeof(u)); 1820 read_defaults(&u); 1821 u.u_uid = -1; 1822 defaultfield = bigD = 0; 1823 while ((c = getopt(argc, argv, "DFG:b:c:d:e:f:g:k:mou:s:" 1824 ADD_OPT_EXTENSIONS)) != -1) { 1825 switch(c) { 1826 case 'D': 1827 bigD = 1; 1828 break; 1829 case 'F': 1830 /* 1831 * Setting -1 will force the new user to 1832 * change their password as soon as they 1833 * next log in - passwd(5). 1834 */ 1835 defaultfield = 1; 1836 memsave(&u.u_inactive, "-1", strlen("-1")); 1837 break; 1838 case 'G': 1839 while (u.u_groupc < NGROUPS_MAX && 1840 (u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL) { 1841 if (u.u_groupv[u.u_groupc][0] != 0) { 1842 u.u_groupc++; 1843 } 1844 } 1845 if (optarg != NULL) { 1846 warnx("Truncated list of secondary groups " 1847 "to %d entries", NGROUPS_MAX); 1848 } 1849 break; 1850 #ifdef EXTENSIONS 1851 case 'S': 1852 u.u_allow_samba = 1; 1853 break; 1854 #endif 1855 case 'b': 1856 defaultfield = 1; 1857 memsave(&u.u_basedir, optarg, strlen(optarg)); 1858 break; 1859 case 'c': 1860 memsave(&u.u_comment, optarg, strlen(optarg)); 1861 break; 1862 case 'd': 1863 memsave(&u.u_home, optarg, strlen(optarg)); 1864 u.u_flags |= F_HOMEDIR; 1865 break; 1866 case 'e': 1867 defaultfield = 1; 1868 memsave(&u.u_expire, optarg, strlen(optarg)); 1869 break; 1870 case 'f': 1871 defaultfield = 1; 1872 memsave(&u.u_inactive, optarg, strlen(optarg)); 1873 break; 1874 case 'g': 1875 defaultfield = 1; 1876 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1877 break; 1878 case 'k': 1879 defaultfield = 1; 1880 memsave(&u.u_skeldir, optarg, strlen(optarg)); 1881 break; 1882 #ifdef EXTENSIONS 1883 case 'L': 1884 defaultfield = 1; 1885 memsave(&u.u_class, optarg, strlen(optarg)); 1886 break; 1887 #endif 1888 case 'm': 1889 u.u_flags |= F_MKDIR; 1890 break; 1891 #ifdef EXTENSIONS 1892 case 'M': 1893 defaultfield = 1; 1894 u.u_homeperm = strtoul(optarg, NULL, 8); 1895 break; 1896 #endif 1897 case 'o': 1898 u.u_flags |= F_DUPUID; 1899 break; 1900 #ifdef EXTENSIONS 1901 case 'p': 1902 memsave(&u.u_password, optarg, strlen(optarg)); 1903 break; 1904 #endif 1905 #ifdef EXTENSIONS 1906 case 'r': 1907 defaultfield = 1; 1908 (void)save_range(&u, optarg); 1909 break; 1910 #endif 1911 case 's': 1912 u.u_flags |= F_SHELL; 1913 defaultfield = 1; 1914 memsave(&u.u_shell, optarg, strlen(optarg)); 1915 break; 1916 case 'u': 1917 u.u_uid = check_numeric(optarg, "uid"); 1918 break; 1919 #ifdef EXTENSIONS 1920 case 'v': 1921 verbose = 1; 1922 break; 1923 #endif 1924 default: 1925 usermgmt_usage("useradd"); 1926 /* NOTREACHED */ 1927 } 1928 } 1929 if (bigD) { 1930 if (defaultfield) { 1931 checkeuid(); 1932 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1933 } 1934 (void)printf("group\t\t%s\n", u.u_primgrp); 1935 (void)printf("base_dir\t%s\n", u.u_basedir); 1936 (void)printf("skel_dir\t%s\n", u.u_skeldir); 1937 (void)printf("shell\t\t%s\n", u.u_shell); 1938 #ifdef EXTENSIONS 1939 (void)printf("class\t\t%s\n", u.u_class); 1940 (void)printf("homeperm\t0%o\n", u.u_homeperm); 1941 #endif 1942 (void)printf("inactive\t%s\n", (u.u_inactive == NULL) ? 1943 UNSET_INACTIVE : u.u_inactive); 1944 (void)printf("expire\t\t%s\n", (u.u_expire == NULL) ? 1945 UNSET_EXPIRY : u.u_expire); 1946 #ifdef EXTENSIONS 1947 for (i = 0 ; i < u.u_rc ; i++) { 1948 (void)printf("range\t\t%d..%d\n", 1949 u.u_rv[i].r_from, u.u_rv[i].r_to); 1950 } 1951 #endif 1952 return EXIT_SUCCESS; 1953 } 1954 argc -= optind; 1955 argv += optind; 1956 if (argc != 1) { 1957 usermgmt_usage("useradd"); 1958 } 1959 checkeuid(); 1960 openlog("useradd", LOG_PID, LOG_USER); 1961 return adduser(*argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1962 } 1963 1964 #ifdef EXTENSIONS 1965 #define MOD_OPT_EXTENSIONS "p:vL:S" 1966 #else 1967 #define MOD_OPT_EXTENSIONS 1968 #endif 1969 1970 int 1971 usermod(int argc, char **argv) 1972 { 1973 user_t u; 1974 char newuser[MaxUserNameLen + 1]; 1975 int c, have_new_user; 1976 1977 (void)memset(&u, 0, sizeof(u)); 1978 (void)memset(newuser, 0, sizeof(newuser)); 1979 read_defaults(&u); 1980 have_new_user = 0; 1981 u.u_locked = -1; 1982 while ((c = getopt(argc, argv, "C:FG:c:d:e:f:g:l:mos:u:" 1983 MOD_OPT_EXTENSIONS)) != -1) { 1984 switch(c) { 1985 case 'G': 1986 while (u.u_groupc < NGROUPS_MAX && 1987 (u.u_groupv[u.u_groupc] = 1988 strsep(&optarg, ",")) != NULL) { 1989 if (u.u_groupv[u.u_groupc][0] != 0) { 1990 u.u_groupc++; 1991 } 1992 } 1993 if (optarg != NULL) { 1994 warnx("Truncated list of secondary groups " 1995 "to %d entries", NGROUPS_MAX); 1996 } 1997 u.u_flags |= F_SECGROUP; 1998 break; 1999 #ifdef EXTENSIONS 2000 case 'S': 2001 u.u_allow_samba = 1; 2002 break; 2003 #endif 2004 case 'c': 2005 memsave(&u.u_comment, optarg, strlen(optarg)); 2006 u.u_flags |= F_COMMENT; 2007 break; 2008 case 'C': 2009 if (strcasecmp(optarg, "yes") == 0) { 2010 u.u_locked = LOCK; 2011 } else if (strcasecmp(optarg, "no") == 0) { 2012 u.u_locked = UNLOCK; 2013 } else { 2014 /* No idea. */ 2015 errx(EXIT_FAILURE, 2016 "Please type 'yes' or 'no'"); 2017 } 2018 break; 2019 case 'F': 2020 memsave(&u.u_inactive, "-1", strlen("-1")); 2021 u.u_flags |= F_INACTIVE; 2022 break; 2023 case 'd': 2024 memsave(&u.u_home, optarg, strlen(optarg)); 2025 u.u_flags |= F_HOMEDIR; 2026 break; 2027 case 'e': 2028 memsave(&u.u_expire, optarg, strlen(optarg)); 2029 u.u_flags |= F_EXPIRE; 2030 break; 2031 case 'f': 2032 memsave(&u.u_inactive, optarg, strlen(optarg)); 2033 u.u_flags |= F_INACTIVE; 2034 break; 2035 case 'g': 2036 memsave(&u.u_primgrp, optarg, strlen(optarg)); 2037 u.u_flags |= F_GROUP; 2038 break; 2039 case 'l': 2040 (void)strlcpy(newuser, optarg, sizeof(newuser)); 2041 have_new_user = 1; 2042 u.u_flags |= F_USERNAME; 2043 break; 2044 #ifdef EXTENSIONS 2045 case 'L': 2046 memsave(&u.u_class, optarg, strlen(optarg)); 2047 u.u_flags |= F_CLASS; 2048 break; 2049 #endif 2050 case 'm': 2051 u.u_flags |= F_MKDIR; 2052 break; 2053 case 'o': 2054 u.u_flags |= F_DUPUID; 2055 break; 2056 #ifdef EXTENSIONS 2057 case 'p': 2058 memsave(&u.u_password, optarg, strlen(optarg)); 2059 u.u_flags |= F_PASSWORD; 2060 break; 2061 #endif 2062 case 's': 2063 memsave(&u.u_shell, optarg, strlen(optarg)); 2064 u.u_flags |= F_SHELL; 2065 break; 2066 case 'u': 2067 u.u_uid = check_numeric(optarg, "uid"); 2068 u.u_flags |= F_UID; 2069 break; 2070 #ifdef EXTENSIONS 2071 case 'v': 2072 verbose = 1; 2073 break; 2074 #endif 2075 default: 2076 usermgmt_usage("usermod"); 2077 /* NOTREACHED */ 2078 } 2079 } 2080 if ((u.u_flags & F_MKDIR) && !(u.u_flags & F_HOMEDIR) && 2081 !(u.u_flags & F_USERNAME)) { 2082 warnx("Option 'm' useless without 'd' or 'l' -- ignored"); 2083 u.u_flags &= ~F_MKDIR; 2084 } 2085 argc -= optind; 2086 argv += optind; 2087 if (argc != 1) { 2088 usermgmt_usage("usermod"); 2089 } 2090 checkeuid(); 2091 openlog("usermod", LOG_PID, LOG_USER); 2092 return moduser(*argv, (have_new_user) ? newuser : *argv, &u, 2093 u.u_allow_samba) ? EXIT_SUCCESS : EXIT_FAILURE; 2094 } 2095 2096 #ifdef EXTENSIONS 2097 #define DEL_OPT_EXTENSIONS "Dp:vS" 2098 #else 2099 #define DEL_OPT_EXTENSIONS 2100 #endif 2101 2102 int 2103 userdel(int argc, char **argv) 2104 { 2105 struct passwd *pwp; 2106 user_t u; 2107 char password[PasswordLength + 1]; 2108 int defaultfield; 2109 int rmhome; 2110 int bigD; 2111 int c; 2112 2113 (void)memset(&u, 0, sizeof(u)); 2114 read_defaults(&u); 2115 defaultfield = bigD = rmhome = 0; 2116 while ((c = getopt(argc, argv, "r" DEL_OPT_EXTENSIONS)) != -1) { 2117 switch(c) { 2118 #ifdef EXTENSIONS 2119 case 'D': 2120 bigD = 1; 2121 break; 2122 #endif 2123 #ifdef EXTENSIONS 2124 case 'S': 2125 u.u_allow_samba = 1; 2126 break; 2127 #endif 2128 #ifdef EXTENSIONS 2129 case 'p': 2130 defaultfield = 1; 2131 u.u_preserve = (strcmp(optarg, "true") == 0) ? 1 : 2132 (strcmp(optarg, "yes") == 0) ? 1 : 2133 atoi(optarg); 2134 break; 2135 #endif 2136 case 'r': 2137 rmhome = 1; 2138 break; 2139 #ifdef EXTENSIONS 2140 case 'v': 2141 verbose = 1; 2142 break; 2143 #endif 2144 default: 2145 usermgmt_usage("userdel"); 2146 /* NOTREACHED */ 2147 } 2148 } 2149 #ifdef EXTENSIONS 2150 if (bigD) { 2151 if (defaultfield) { 2152 checkeuid(); 2153 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 2154 } 2155 (void)printf("preserve\t%s\n", (u.u_preserve) ? "true" : 2156 "false"); 2157 return EXIT_SUCCESS; 2158 } 2159 #endif 2160 argc -= optind; 2161 argv += optind; 2162 if (argc != 1) { 2163 usermgmt_usage("userdel"); 2164 } 2165 checkeuid(); 2166 if ((pwp = getpwnam(*argv)) == NULL) { 2167 warnx("No such user `%s'", *argv); 2168 return EXIT_FAILURE; 2169 } 2170 if (rmhome) { 2171 (void)removehomedir(pwp); 2172 } 2173 if (u.u_preserve) { 2174 u.u_flags |= F_SHELL; 2175 memsave(&u.u_shell, NOLOGIN, strlen(NOLOGIN)); 2176 (void)memset(password, '*', DES_Len); 2177 password[DES_Len] = 0; 2178 memsave(&u.u_password, password, strlen(password)); 2179 u.u_flags |= F_PASSWORD; 2180 openlog("userdel", LOG_PID, LOG_USER); 2181 return moduser(*argv, *argv, &u, u.u_allow_samba) ? 2182 EXIT_SUCCESS : EXIT_FAILURE; 2183 } 2184 if (!rm_user_from_groups(*argv)) { 2185 return 0; 2186 } 2187 openlog("userdel", LOG_PID, LOG_USER); 2188 return moduser(*argv, *argv, NULL, u.u_allow_samba) ? 2189 EXIT_SUCCESS : EXIT_FAILURE; 2190 } 2191 2192 #ifdef EXTENSIONS 2193 #define GROUP_ADD_OPT_EXTENSIONS "r:v" 2194 #else 2195 #define GROUP_ADD_OPT_EXTENSIONS 2196 #endif 2197 2198 /* add a group */ 2199 int 2200 groupadd(int argc, char **argv) 2201 { 2202 int dupgid; 2203 int gid; 2204 int c; 2205 int lowgid; 2206 int highgid; 2207 2208 gid = -1; 2209 dupgid = 0; 2210 lowgid = LowGid; 2211 highgid = HighGid; 2212 while ((c = getopt(argc, argv, "g:o" GROUP_ADD_OPT_EXTENSIONS)) != -1) { 2213 switch(c) { 2214 case 'g': 2215 gid = check_numeric(optarg, "gid"); 2216 break; 2217 case 'o': 2218 dupgid = 1; 2219 break; 2220 #ifdef EXTENSIONS 2221 case 'r': 2222 if (sscanf(optarg, "%d..%d", &lowgid, &highgid) != 2) { 2223 errx(EXIT_FAILURE, "Bad range `%s'", optarg); 2224 } 2225 break; 2226 case 'v': 2227 verbose = 1; 2228 break; 2229 #endif 2230 default: 2231 usermgmt_usage("groupadd"); 2232 /* NOTREACHED */ 2233 } 2234 } 2235 argc -= optind; 2236 argv += optind; 2237 if (argc != 1) { 2238 usermgmt_usage("groupadd"); 2239 } 2240 checkeuid(); 2241 if (gid < 0 && !getnextgid(&gid, lowgid, highgid)) { 2242 err(EXIT_FAILURE, "Can't add group: can't get next gid"); 2243 } 2244 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 2245 errx(EXIT_FAILURE, "Can't add group: gid %d is a duplicate", 2246 gid); 2247 } 2248 if (!valid_group(*argv)) { 2249 warnx("Invalid group name `%s'", *argv); 2250 } 2251 openlog("groupadd", LOG_PID, LOG_USER); 2252 if (!creategid(*argv, gid, "")) 2253 exit(EXIT_FAILURE); 2254 2255 return EXIT_SUCCESS; 2256 } 2257 2258 #ifdef EXTENSIONS 2259 #define GROUP_DEL_OPT_EXTENSIONS "v" 2260 #else 2261 #define GROUP_DEL_OPT_EXTENSIONS 2262 #endif 2263 2264 /* remove a group */ 2265 int 2266 groupdel(int argc, char **argv) 2267 { 2268 int c; 2269 2270 while ((c = getopt(argc, argv, "" GROUP_DEL_OPT_EXTENSIONS)) != -1) { 2271 switch(c) { 2272 #ifdef EXTENSIONS 2273 case 'v': 2274 verbose = 1; 2275 break; 2276 #endif 2277 default: 2278 usermgmt_usage("groupdel"); 2279 /* NOTREACHED */ 2280 } 2281 } 2282 argc -= optind; 2283 argv += optind; 2284 if (argc != 1) { 2285 usermgmt_usage("groupdel"); 2286 } 2287 if (getgrnam(*argv) == NULL) { 2288 errx(EXIT_FAILURE, "No such group `%s'", *argv); 2289 } 2290 checkeuid(); 2291 openlog("groupdel", LOG_PID, LOG_USER); 2292 if (!modify_gid(*argv, NULL)) 2293 exit(EXIT_FAILURE); 2294 2295 return EXIT_SUCCESS; 2296 } 2297 2298 #ifdef EXTENSIONS 2299 #define GROUP_MOD_OPT_EXTENSIONS "v" 2300 #else 2301 #define GROUP_MOD_OPT_EXTENSIONS 2302 #endif 2303 2304 /* modify a group */ 2305 int 2306 groupmod(int argc, char **argv) 2307 { 2308 struct group *grp; 2309 char buf[MaxEntryLen]; 2310 char *newname; 2311 char **cpp; 2312 int dupgid; 2313 int gid; 2314 int cc; 2315 int c; 2316 2317 gid = -1; 2318 dupgid = 0; 2319 newname = NULL; 2320 while ((c = getopt(argc, argv, "g:on:" GROUP_MOD_OPT_EXTENSIONS)) != -1) { 2321 switch(c) { 2322 case 'g': 2323 gid = check_numeric(optarg, "gid"); 2324 break; 2325 case 'o': 2326 dupgid = 1; 2327 break; 2328 case 'n': 2329 memsave(&newname, optarg, strlen(optarg)); 2330 break; 2331 #ifdef EXTENSIONS 2332 case 'v': 2333 verbose = 1; 2334 break; 2335 #endif 2336 default: 2337 usermgmt_usage("groupmod"); 2338 /* NOTREACHED */ 2339 } 2340 } 2341 argc -= optind; 2342 argv += optind; 2343 if (argc != 1) { 2344 usermgmt_usage("groupmod"); 2345 } 2346 checkeuid(); 2347 if (gid < 0 && newname == NULL) { 2348 errx(EXIT_FAILURE, "Nothing to change"); 2349 } 2350 if (dupgid && gid < 0) { 2351 errx(EXIT_FAILURE, "Duplicate which gid?"); 2352 } 2353 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 2354 errx(EXIT_FAILURE, "Can't modify group: gid %d is a duplicate", 2355 gid); 2356 } 2357 if ((grp = find_group_info(*argv)) == NULL) { 2358 errx(EXIT_FAILURE, "Can't find group `%s' to modify", *argv); 2359 } 2360 if (!is_local(*argv, _PATH_GROUP)) { 2361 errx(EXIT_FAILURE, "Group `%s' must be a local group", *argv); 2362 } 2363 if (newname != NULL && !valid_group(newname)) { 2364 warnx("Invalid group name `%s'", newname); 2365 } 2366 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:", 2367 (newname) ? newname : grp->gr_name, 2368 grp->gr_passwd, 2369 (gid < 0) ? grp->gr_gid : gid); 2370 for (cpp = grp->gr_mem ; *cpp && cc < sizeof(buf) ; cpp++) { 2371 cc += snprintf(&buf[cc], sizeof(buf) - cc, "%s%s", *cpp, 2372 (cpp[1] == NULL) ? "" : ","); 2373 } 2374 cc += snprintf(&buf[cc], sizeof(buf) - cc, "\n"); 2375 if (newname != NULL) 2376 free(newname); 2377 openlog("groupmod", LOG_PID, LOG_USER); 2378 if (!modify_gid(*argv, buf)) 2379 exit(EXIT_FAILURE); 2380 2381 return EXIT_SUCCESS; 2382 } 2383 2384 #ifdef EXTENSIONS 2385 /* display user information */ 2386 int 2387 userinfo(int argc, char **argv) 2388 { 2389 struct passwd *pwp; 2390 struct group *grp; 2391 char buf[MaxEntryLen]; 2392 char **cpp; 2393 int exists; 2394 int cc; 2395 int i; 2396 2397 exists = 0; 2398 buf[0] = '\0'; 2399 while ((i = getopt(argc, argv, "e")) != -1) { 2400 switch(i) { 2401 case 'e': 2402 exists = 1; 2403 break; 2404 default: 2405 usermgmt_usage("userinfo"); 2406 /* NOTREACHED */ 2407 } 2408 } 2409 argc -= optind; 2410 argv += optind; 2411 if (argc != 1) { 2412 usermgmt_usage("userinfo"); 2413 } 2414 pwp = find_user_info(*argv); 2415 if (exists) { 2416 exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE); 2417 } 2418 if (pwp == NULL) { 2419 errx(EXIT_FAILURE, "Can't find user `%s'", *argv); 2420 } 2421 (void)printf("login\t%s\n", pwp->pw_name); 2422 (void)printf("passwd\t%s\n", pwp->pw_passwd); 2423 (void)printf("uid\t%d\n", pwp->pw_uid); 2424 for (cc = 0 ; (grp = getgrent()) != NULL ; ) { 2425 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2426 if (strcmp(*cpp, *argv) == 0 && 2427 grp->gr_gid != pwp->pw_gid) { 2428 cc += snprintf(&buf[cc], sizeof(buf) - cc, 2429 "%s ", grp->gr_name); 2430 } 2431 } 2432 } 2433 if ((grp = getgrgid(pwp->pw_gid)) == NULL) { 2434 (void)printf("groups\t%d %s\n", pwp->pw_gid, buf); 2435 } else { 2436 (void)printf("groups\t%s %s\n", grp->gr_name, buf); 2437 } 2438 (void)printf("change\t%s", pwp->pw_change > 0 ? 2439 ctime(&pwp->pw_change) : pwp->pw_change == -1 ? 2440 "NEXT LOGIN\n" : "NEVER\n"); 2441 (void)printf("class\t%s\n", pwp->pw_class); 2442 (void)printf("gecos\t%s\n", pwp->pw_gecos); 2443 (void)printf("dir\t%s\n", pwp->pw_dir); 2444 (void)printf("shell\t%s\n", pwp->pw_shell); 2445 (void)printf("expire\t%s", pwp->pw_expire ? 2446 ctime(&pwp->pw_expire) : "NEVER\n"); 2447 return EXIT_SUCCESS; 2448 } 2449 #endif 2450 2451 #ifdef EXTENSIONS 2452 /* display user information */ 2453 int 2454 groupinfo(int argc, char **argv) 2455 { 2456 struct group *grp; 2457 char **cpp; 2458 int exists; 2459 int i; 2460 2461 exists = 0; 2462 while ((i = getopt(argc, argv, "ev")) != -1) { 2463 switch(i) { 2464 case 'e': 2465 exists = 1; 2466 break; 2467 case 'v': 2468 verbose = 1; 2469 break; 2470 default: 2471 usermgmt_usage("groupinfo"); 2472 /* NOTREACHED */ 2473 } 2474 } 2475 argc -= optind; 2476 argv += optind; 2477 if (argc != 1) { 2478 usermgmt_usage("groupinfo"); 2479 } 2480 grp = find_group_info(*argv); 2481 if (exists) { 2482 exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE); 2483 } 2484 if (grp == NULL) { 2485 errx(EXIT_FAILURE, "Can't find group `%s'", *argv); 2486 } 2487 (void)printf("name\t%s\n", grp->gr_name); 2488 (void)printf("passwd\t%s\n", grp->gr_passwd); 2489 (void)printf("gid\t%d\n", grp->gr_gid); 2490 (void)printf("members\t"); 2491 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2492 (void)printf("%s", *cpp); 2493 if (*(cpp + 1)) { 2494 (void) printf(", "); 2495 } 2496 } 2497 (void)fputc('\n', stdout); 2498 return EXIT_SUCCESS; 2499 } 2500 #endif 2501