1 /* $NetBSD: user.c,v 1.117 2006/11/02 21:42:08 pavel Exp $ */ 2 3 /* 4 * Copyright (c) 1999 Alistair G. Crooks. All rights reserved. 5 * Copyright (c) 2005 Liam J. Foy. All rights reserved. 6 * Copyright (c) 2005 Hubert Feyrer <hubert@feyrer.de>. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote 17 * products derived from this software without specific prior written 18 * permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 21 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 22 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 24 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 26 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 28 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 #include <sys/cdefs.h> 33 34 #ifndef lint 35 __COPYRIGHT("@(#) Copyright (c) 1999 \ 36 The NetBSD Foundation, Inc. All rights reserved."); 37 __RCSID("$NetBSD: user.c,v 1.117 2006/11/02 21:42:08 pavel Exp $"); 38 #endif 39 40 #include <sys/types.h> 41 #include <sys/param.h> 42 #include <sys/stat.h> 43 44 #include <ctype.h> 45 #include <dirent.h> 46 #include <err.h> 47 #include <fcntl.h> 48 #include <grp.h> 49 #ifdef EXTENSIONS 50 #include <login_cap.h> 51 #endif 52 #include <paths.h> 53 #include <pwd.h> 54 #include <regex.h> 55 #include <stdarg.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <syslog.h> 60 #include <time.h> 61 #include <unistd.h> 62 #include <util.h> 63 #include <errno.h> 64 65 #include "defs.h" 66 #include "usermgmt.h" 67 68 69 /* this struct describes a uid range */ 70 typedef struct range_t { 71 int r_from; /* low uid */ 72 int r_to; /* high uid */ 73 } range_t; 74 75 /* this struct encapsulates the user information */ 76 typedef struct user_t { 77 int u_flags; /* see below */ 78 int u_uid; /* uid of user */ 79 char *u_password; /* encrypted password */ 80 char *u_comment; /* comment field */ 81 char *u_home; /* home directory */ 82 mode_t u_homeperm; /* permissions of home dir */ 83 char *u_primgrp; /* primary group */ 84 int u_groupc; /* # of secondary groups */ 85 const char *u_groupv[NGROUPS_MAX]; /* secondary groups */ 86 char *u_shell; /* user's shell */ 87 char *u_basedir; /* base directory for home */ 88 char *u_expire; /* when password will expire */ 89 char *u_inactive; /* when account will expire */ 90 char *u_skeldir; /* directory for startup files */ 91 char *u_class; /* login class */ 92 unsigned u_rsize; /* size of range array */ 93 unsigned u_rc; /* # of ranges */ 94 range_t *u_rv; /* the ranges */ 95 unsigned u_defrc; /* # of ranges in defaults */ 96 int u_preserve; /* preserve uids on deletion */ 97 int u_allow_samba; /* allow trailing '$' for samba login names */ 98 int u_locked; /* user account lock */ 99 } user_t; 100 101 /* flags for which fields of the user_t replace the passwd entry */ 102 enum { 103 F_COMMENT = 0x0001, 104 F_DUPUID = 0x0002, 105 F_EXPIRE = 0x0004, 106 F_GROUP = 0x0008, 107 F_HOMEDIR = 0x0010, 108 F_MKDIR = 0x0020, 109 F_INACTIVE = 0x0040, 110 F_PASSWORD = 0x0080, 111 F_SECGROUP = 0x0100, 112 F_SHELL = 0x0200, 113 F_UID = 0x0400, 114 F_USERNAME = 0x0800, 115 F_CLASS = 0x1000 116 }; 117 118 #define UNLOCK 0 119 #define LOCK 1 120 #define LOCKED "*LOCKED*" 121 122 #define PATH_LOGINCONF "/etc/login.conf" 123 124 #ifndef DEF_GROUP 125 #define DEF_GROUP "users" 126 #endif 127 128 #ifndef DEF_BASEDIR 129 #define DEF_BASEDIR "/home" 130 #endif 131 132 #ifndef DEF_SKELDIR 133 #define DEF_SKELDIR "/etc/skel" 134 #endif 135 136 #ifndef DEF_SHELL 137 #define DEF_SHELL _PATH_BSHELL 138 #endif 139 140 #ifndef DEF_COMMENT 141 #define DEF_COMMENT "" 142 #endif 143 144 #ifndef DEF_LOWUID 145 #define DEF_LOWUID 1000 146 #endif 147 148 #ifndef DEF_HIGHUID 149 #define DEF_HIGHUID 60000 150 #endif 151 152 #ifndef DEF_INACTIVE 153 #define DEF_INACTIVE 0 154 #endif 155 156 #ifndef DEF_EXPIRE 157 #define DEF_EXPIRE NULL 158 #endif 159 160 #ifndef DEF_CLASS 161 #define DEF_CLASS "" 162 #endif 163 164 #ifndef WAITSECS 165 #define WAITSECS 10 166 #endif 167 168 #ifndef NOBODY_UID 169 #define NOBODY_UID 32767 170 #endif 171 172 #ifndef DEF_HOMEPERM 173 #define DEF_HOMEPERM 0755 174 #endif 175 176 /* some useful constants */ 177 enum { 178 MaxShellNameLen = 256, 179 MaxFileNameLen = MAXPATHLEN, 180 MaxUserNameLen = LOGIN_NAME_MAX - 1, 181 MaxCommandLen = 2048, 182 MaxEntryLen = 2048, 183 PasswordLength = 2048, 184 185 DES_Len = 13, 186 187 LowGid = DEF_LOWUID, 188 HighGid = DEF_HIGHUID 189 }; 190 191 /* Full paths of programs used here */ 192 #define CHMOD "/bin/chmod" 193 #define CHOWN "/usr/sbin/chown" 194 #define MKDIR "/bin/mkdir" 195 #define MV "/bin/mv" 196 #define NOLOGIN "/sbin/nologin" 197 #define PAX "/bin/pax" 198 #define RM "/bin/rm" 199 200 #define UNSET_INACTIVE "Null (unset)" 201 #define UNSET_EXPIRY "Null (unset)" 202 203 static int asystem(const char *fmt, ...) 204 __attribute__((__format__(__printf__, 1, 2))); 205 static int is_number(const char *); 206 static struct group *find_group_info(const char *); 207 static int verbose; 208 209 static char * 210 skipspace(char *s) 211 { 212 for (; *s && isspace((unsigned char)*s) ; s++) { 213 } 214 return s; 215 } 216 217 static int 218 check_numeric(const char *val, const char *name) 219 { 220 if (!is_number(val)) { 221 errx(EXIT_FAILURE, "When using [-%c %s], " 222 "the %s must be numeric", *name, name, name); 223 } 224 return atoi(val); 225 } 226 227 /* resize *cpp appropriately then assign `n' chars of `s' to it */ 228 static void 229 memsave(char **cpp, const char *s, size_t n) 230 { 231 RENEW(char, *cpp, n + 1, exit(1)); 232 (void)memcpy(*cpp, s, n); 233 (*cpp)[n] = '\0'; 234 } 235 236 /* a replacement for system(3) */ 237 static int 238 asystem(const char *fmt, ...) 239 { 240 va_list vp; 241 char buf[MaxCommandLen]; 242 int ret; 243 244 va_start(vp, fmt); 245 (void)vsnprintf(buf, sizeof(buf), fmt, vp); 246 va_end(vp); 247 if (verbose) { 248 (void)printf("Command: %s\n", buf); 249 } 250 if ((ret = system(buf)) != 0) { 251 warn("Error running `%s'", buf); 252 } 253 return ret; 254 } 255 256 /* remove a users home directory, returning 1 for success (ie, no problems encountered) */ 257 static int 258 removehomedir(struct passwd *pwp) 259 { 260 struct stat st; 261 262 /* userid not root? */ 263 if (pwp->pw_uid == 0) { 264 warnx("Not deleting home directory `%s'; userid is 0", pwp->pw_dir); 265 return 0; 266 } 267 268 /* directory exists (and is a directory!) */ 269 if (stat(pwp->pw_dir, &st) < 0) { 270 warn("Cannot access home directory `%s'", pwp->pw_dir); 271 return 0; 272 } 273 if (!S_ISDIR(st.st_mode)) { 274 warnx("Home directory `%s' is not a directory", pwp->pw_dir); 275 return 0; 276 } 277 278 /* userid matches directory owner? */ 279 if (st.st_uid != pwp->pw_uid) { 280 warnx("User `%s' doesn't own directory `%s', not removed", 281 pwp->pw_name, pwp->pw_dir); 282 return 0; 283 } 284 285 (void)seteuid(pwp->pw_uid); 286 /* we add the "|| true" to keep asystem() quiet if there is a non-zero exit status. */ 287 (void)asystem("%s -rf %s > /dev/null 2>&1 || true", RM, pwp->pw_dir); 288 (void)seteuid(0); 289 if (rmdir(pwp->pw_dir) < 0) { 290 warn("Unable to remove all files in `%s'", pwp->pw_dir); 291 return 0; 292 } 293 return 1; 294 } 295 296 /* return 1 if all of `s' is numeric */ 297 static int 298 is_number(const char *s) 299 { 300 for ( ; *s ; s++) { 301 if (!isdigit((unsigned char) *s)) { 302 return 0; 303 } 304 } 305 return 1; 306 } 307 308 /* 309 * check that the effective uid is 0 - called from funcs which will 310 * modify data and config files. 311 */ 312 static void 313 checkeuid(void) 314 { 315 if (geteuid() != 0) { 316 errx(EXIT_FAILURE, "Program must be run as root"); 317 } 318 } 319 320 /* copy any dot files into the user's home directory */ 321 static int 322 copydotfiles(char *skeldir, int uid, int gid, char *dir, mode_t homeperm) 323 { 324 struct dirent *dp; 325 DIR *dirp; 326 int n; 327 328 if ((dirp = opendir(skeldir)) == NULL) { 329 warn("Can't open source . files dir `%s'", skeldir); 330 return 0; 331 } 332 for (n = 0; (dp = readdir(dirp)) != NULL && n == 0 ; ) { 333 if (strcmp(dp->d_name, ".") == 0 || 334 strcmp(dp->d_name, "..") == 0) { 335 continue; 336 } 337 n = 1; 338 } 339 (void)closedir(dirp); 340 if (n == 0) { 341 warnx("No \"dot\" initialisation files found"); 342 } else { 343 (void)asystem("cd %s && %s -rw -pe %s . %s", 344 skeldir, PAX, (verbose) ? "-v" : "", dir); 345 } 346 (void)asystem("%s -R -h %d:%d %s", CHOWN, uid, gid, dir); 347 (void)asystem("%s -R u+w %s", CHMOD, dir); 348 #ifdef EXTENSIONS 349 (void)asystem("%s 0%o %s", CHMOD, homeperm, dir); 350 #endif 351 return n; 352 } 353 354 /* create a group entry with gid `gid' */ 355 static int 356 creategid(char *group, int gid, const char *name) 357 { 358 struct stat st; 359 FILE *from; 360 FILE *to; 361 char buf[MaxEntryLen]; 362 char f[MaxFileNameLen]; 363 int fd; 364 int cc; 365 366 if (getgrnam(group) != NULL) { 367 warnx("Can't create group `%s': already exists", group); 368 return 0; 369 } 370 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 371 warn("Can't create group `%s': can't open `%s'", name, 372 _PATH_GROUP); 373 return 0; 374 } 375 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 376 warn("Can't lock `%s'", _PATH_GROUP); 377 (void)fclose(from); 378 return 0; 379 } 380 (void)fstat(fileno(from), &st); 381 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 382 if ((fd = mkstemp(f)) < 0) { 383 warn("Can't create group `%s': mkstemp failed", group); 384 (void)fclose(from); 385 return 0; 386 } 387 if ((to = fdopen(fd, "w")) == NULL) { 388 warn("Can't create group `%s': fdopen `%s' failed", 389 group, f); 390 (void)fclose(from); 391 (void)close(fd); 392 (void)unlink(f); 393 return 0; 394 } 395 while ((cc = fread(buf, sizeof(char), sizeof(buf), from)) > 0) { 396 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 397 warn("Can't create group `%s': short write to `%s'", 398 group, f); 399 (void)fclose(from); 400 (void)close(fd); 401 (void)unlink(f); 402 return 0; 403 } 404 } 405 (void)fprintf(to, "%s:*:%d:%s\n", group, gid, name); 406 (void)fclose(from); 407 (void)fclose(to); 408 if (rename(f, _PATH_GROUP) < 0) { 409 warn("Can't create group `%s': can't rename `%s' to `%s'", 410 group, f, _PATH_GROUP); 411 (void)unlink(f); 412 return 0; 413 } 414 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 415 syslog(LOG_INFO, "New group added: name=%s, gid=%d", group, gid); 416 return 1; 417 } 418 419 /* modify the group entry with name `group' to be newent */ 420 static int 421 modify_gid(char *group, char *newent) 422 { 423 struct stat st; 424 FILE *from; 425 FILE *to; 426 char buf[MaxEntryLen]; 427 char f[MaxFileNameLen]; 428 char *colon; 429 int groupc; 430 int entc; 431 int fd; 432 int cc; 433 434 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 435 warn("Can't modify group `%s': can't open `%s'", 436 group, _PATH_GROUP); 437 return 0; 438 } 439 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 440 warn("Can't modify group `%s': can't lock `%s'", 441 group, _PATH_GROUP); 442 (void)fclose(from); 443 return 0; 444 } 445 (void)fstat(fileno(from), &st); 446 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 447 if ((fd = mkstemp(f)) < 0) { 448 warn("Can't modify group `%s': mkstemp failed", group); 449 (void)fclose(from); 450 return 0; 451 } 452 if ((to = fdopen(fd, "w")) == NULL) { 453 warn("Can't modify group `%s': fdopen `%s' failed", group, f); 454 (void)fclose(from); 455 (void)close(fd); 456 (void)unlink(f); 457 return 0; 458 } 459 groupc = strlen(group); 460 while (fgets(buf, sizeof(buf), from) != NULL) { 461 cc = strlen(buf); 462 if ((colon = strchr(buf, ':')) == NULL) { 463 warnx("Badly formed entry `%s'", buf); 464 continue; 465 } 466 entc = (int)(colon - buf); 467 if (entc == groupc && 468 strncmp(group, buf, (unsigned) entc) == 0) { 469 if (newent == NULL) { 470 struct group *grp_rm; 471 struct passwd *user_pwd; 472 473 /* 474 * Check that the group being removed 475 * isn't any user's Primary group. Just 476 * warn if it is. This could cause problems 477 * if the group GID was reused for a 478 * different purpose. 479 */ 480 481 grp_rm = find_group_info(group); 482 while ((user_pwd = getpwent()) != NULL) { 483 if (user_pwd->pw_gid == grp_rm->gr_gid) { 484 warnx("Warning: group `%s'(%d)" 485 " is the primary group of" 486 " `%s'. Use caution if you" 487 " later add this GID.", 488 grp_rm->gr_name, 489 grp_rm->gr_gid, user_pwd->pw_name); 490 } 491 } 492 endpwent(); 493 continue; 494 } else { 495 cc = strlen(newent); 496 (void)strlcpy(buf, newent, sizeof(buf)); 497 } 498 } 499 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 500 warn("Can't modify group `%s': short write to `%s'", 501 group, f); 502 (void)fclose(from); 503 (void)close(fd); 504 (void)unlink(f); 505 return 0; 506 } 507 } 508 (void)fclose(from); 509 (void)fclose(to); 510 if (rename(f, _PATH_GROUP) < 0) { 511 warn("Can't modify group `%s': can't rename `%s' to `%s'", 512 group, f, _PATH_GROUP); 513 (void)unlink(f); 514 return 0; 515 } 516 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 517 if (newent == NULL) { 518 syslog(LOG_INFO, "group deleted: name=%s", group); 519 } else { 520 syslog(LOG_INFO, "group information modified: name=%s", group); 521 } 522 return 1; 523 } 524 525 /* modify the group entries for all `groups', by adding `user' */ 526 static int 527 append_group(char *user, int ngroups, const char **groups) 528 { 529 struct group *grp; 530 struct stat st; 531 FILE *from; 532 FILE *to; 533 char buf[MaxEntryLen]; 534 char f[MaxFileNameLen]; 535 char *colon; 536 int groupc; 537 int entc; 538 int fd; 539 int nc; 540 int cc; 541 int i; 542 int j; 543 544 for (i = 0 ; i < ngroups ; i++) { 545 if ((grp = getgrnam(groups[i])) == NULL) { 546 warnx("Can't append group `%s' for user `%s'", 547 groups[i], user); 548 } else { 549 for (j = 0 ; grp->gr_mem[j] ; j++) { 550 if (strcmp(user, grp->gr_mem[j]) == 0) { 551 /* already in it */ 552 groups[i] = ""; 553 } 554 } 555 } 556 } 557 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 558 warn("Can't append group(s) for `%s': can't open `%s'", 559 user, _PATH_GROUP); 560 return 0; 561 } 562 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 563 warn("Can't append group(s) for `%s': can't lock `%s'", 564 user, _PATH_GROUP); 565 (void)fclose(from); 566 return 0; 567 } 568 (void)fstat(fileno(from), &st); 569 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 570 if ((fd = mkstemp(f)) < 0) { 571 warn("Can't append group(s) for `%s': mkstemp failed", 572 user); 573 (void)fclose(from); 574 return 0; 575 } 576 if ((to = fdopen(fd, "w")) == NULL) { 577 warn("Can't append group(s) for `%s': fdopen `%s' failed", 578 user, f); 579 (void)fclose(from); 580 (void)close(fd); 581 (void)unlink(f); 582 return 0; 583 } 584 while (fgets(buf, sizeof(buf), from) != NULL) { 585 cc = strlen(buf); 586 if ((colon = strchr(buf, ':')) == NULL) { 587 warnx("Badly formed entry `%s'", buf); 588 continue; 589 } 590 entc = (int)(colon - buf); 591 for (i = 0 ; i < ngroups ; i++) { 592 if ((groupc = strlen(groups[i])) == 0) { 593 continue; 594 } 595 if (entc == groupc && 596 strncmp(groups[i], buf, (unsigned) entc) == 0) { 597 if ((nc = snprintf(&buf[cc - 1], 598 sizeof(buf) - cc + 1, "%s%s\n", 599 (buf[cc - 2] == ':') ? "" : ",", user)) < 0) { 600 warnx("Warning: group `%s' " 601 "entry too long", groups[i]); 602 } 603 cc += nc - 1; 604 } 605 } 606 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 607 warn("Can't append group(s) for `%s':" 608 " short write to `%s'", user, f); 609 (void)fclose(from); 610 (void)close(fd); 611 (void)unlink(f); 612 return 0; 613 } 614 } 615 (void)fclose(from); 616 (void)fclose(to); 617 if (rename(f, _PATH_GROUP) < 0) { 618 warn("Can't append group(s) for `%s': " 619 "can't rename `%s' to `%s'", user, f, _PATH_GROUP); 620 (void)unlink(f); 621 return 0; 622 } 623 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 624 return 1; 625 } 626 627 /* the valid characters for login and group names */ 628 #define VALID_CHAR(c) (isalnum(c) || (c) == '.' || (c) == '_' || (c) == '-') 629 630 /* return 1 if `login' is a valid login name */ 631 static int 632 valid_login(char *login_name, int allow_samba) 633 { 634 unsigned char *cp; 635 636 /* First character of a login name cannot be '-'. */ 637 if (*login_name == '-') { 638 return 0; 639 } 640 if (strlen(login_name) >= LOGIN_NAME_MAX) { 641 return 0; 642 } 643 for (cp = (unsigned char *)login_name ; *cp ; cp++) { 644 if (!VALID_CHAR(*cp)) { 645 #ifdef EXTENSIONS 646 /* check for a trailing '$' in a Samba user name */ 647 if (allow_samba && *cp == '$' && *(cp + 1) == 0x0) { 648 return 1; 649 } 650 #endif 651 return 0; 652 } 653 } 654 return 1; 655 } 656 657 /* return 1 if `group' is a valid group name */ 658 static int 659 valid_group(char *group) 660 { 661 unsigned char *cp; 662 663 for (cp = (unsigned char *)group; *cp; cp++) { 664 if (!VALID_CHAR(*cp)) { 665 return 0; 666 } 667 } 668 return 1; 669 } 670 671 /* find the next gid in the range lo .. hi */ 672 static int 673 getnextgid(int *gidp, int lo, int hi) 674 { 675 for (*gidp = lo ; *gidp < hi ; *gidp += 1) { 676 if (getgrgid((gid_t)*gidp) == NULL) { 677 return 1; 678 } 679 } 680 return 0; 681 } 682 683 #ifdef EXTENSIONS 684 /* save a range of uids */ 685 static int 686 save_range(user_t *up, char *cp) 687 { 688 int from; 689 int to; 690 int i; 691 692 if (up->u_rsize == 0) { 693 up->u_rsize = 32; 694 NEWARRAY(range_t, up->u_rv, up->u_rsize, return(0)); 695 } else if (up->u_rc == up->u_rsize) { 696 up->u_rsize *= 2; 697 RENEW(range_t, up->u_rv, up->u_rsize, return(0)); 698 } 699 if (up->u_rv && sscanf(cp, "%d..%d", &from, &to) == 2) { 700 for (i = up->u_defrc ; i < up->u_rc ; i++) { 701 if (up->u_rv[i].r_from == from && 702 up->u_rv[i].r_to == to) { 703 break; 704 } 705 } 706 if (i == up->u_rc) { 707 up->u_rv[up->u_rc].r_from = from; 708 up->u_rv[up->u_rc].r_to = to; 709 up->u_rc += 1; 710 } 711 } else { 712 warnx("Bad range `%s'", cp); 713 return 0; 714 } 715 return 1; 716 } 717 #endif 718 719 /* set the defaults in the defaults file */ 720 static int 721 setdefaults(user_t *up) 722 { 723 char template[MaxFileNameLen]; 724 FILE *fp; 725 int ret; 726 int fd; 727 #ifdef EXTENSIONS 728 int i; 729 #endif 730 731 (void)snprintf(template, sizeof(template), "%s.XXXXXX", 732 _PATH_USERMGMT_CONF); 733 if ((fd = mkstemp(template)) < 0) { 734 warn("Can't set defaults: can't mkstemp `%s' for writing", 735 _PATH_USERMGMT_CONF); 736 return 0; 737 } 738 if ((fp = fdopen(fd, "w")) == NULL) { 739 warn("Can't set defaults: can't fdopen `%s' for writing", 740 _PATH_USERMGMT_CONF); 741 return 0; 742 } 743 ret = 1; 744 if (fprintf(fp, "group\t\t%s\n", up->u_primgrp) <= 0 || 745 fprintf(fp, "base_dir\t%s\n", up->u_basedir) <= 0 || 746 fprintf(fp, "skel_dir\t%s\n", up->u_skeldir) <= 0 || 747 fprintf(fp, "shell\t\t%s\n", up->u_shell) <= 0 || 748 #ifdef EXTENSIONS 749 fprintf(fp, "class\t\t%s\n", up->u_class) <= 0 || 750 fprintf(fp, "homeperm\t0%o\n", up->u_homeperm) <= 0 || 751 #endif 752 fprintf(fp, "inactive\t%s\n", (up->u_inactive == NULL) ? 753 UNSET_INACTIVE : up->u_inactive) <= 0 || 754 fprintf(fp, "expire\t\t%s\n", (up->u_expire == NULL) ? 755 UNSET_EXPIRY : up->u_expire) <= 0 || 756 fprintf(fp, "preserve\t%s\n", (up->u_preserve == 0) ? 757 "false" : "true") <= 0) { 758 warn("Can't write to `%s'", _PATH_USERMGMT_CONF); 759 ret = 0; 760 } 761 #ifdef EXTENSIONS 762 for (i = (up->u_defrc != up->u_rc) ? up->u_defrc : 0; 763 i < up->u_rc ; i++) { 764 if (fprintf(fp, "range\t\t%d..%d\n", up->u_rv[i].r_from, 765 up->u_rv[i].r_to) <= 0) { 766 warn("Can't set defaults: can't write to `%s'", 767 _PATH_USERMGMT_CONF); 768 ret = 0; 769 } 770 } 771 #endif 772 (void)fclose(fp); 773 if (ret) { 774 ret = ((rename(template, _PATH_USERMGMT_CONF) == 0) && 775 (chmod(_PATH_USERMGMT_CONF, 0644) == 0)); 776 } 777 return ret; 778 } 779 780 /* read the defaults file */ 781 static void 782 read_defaults(user_t *up) 783 { 784 struct stat st; 785 size_t lineno; 786 size_t len; 787 FILE *fp; 788 char *cp; 789 char *s; 790 791 memsave(&up->u_primgrp, DEF_GROUP, strlen(DEF_GROUP)); 792 memsave(&up->u_basedir, DEF_BASEDIR, strlen(DEF_BASEDIR)); 793 memsave(&up->u_skeldir, DEF_SKELDIR, strlen(DEF_SKELDIR)); 794 memsave(&up->u_shell, DEF_SHELL, strlen(DEF_SHELL)); 795 memsave(&up->u_comment, DEF_COMMENT, strlen(DEF_COMMENT)); 796 #ifdef EXTENSIONS 797 memsave(&up->u_class, DEF_CLASS, strlen(DEF_CLASS)); 798 #endif 799 up->u_rsize = 16; 800 up->u_defrc = 0; 801 NEWARRAY(range_t, up->u_rv, up->u_rsize, exit(1)); 802 up->u_inactive = DEF_INACTIVE; 803 up->u_expire = DEF_EXPIRE; 804 if ((fp = fopen(_PATH_USERMGMT_CONF, "r")) == NULL) { 805 if (stat(_PATH_USERMGMT_CONF, &st) < 0 && !setdefaults(up)) { 806 warn("Can't create `%s' defaults file", 807 _PATH_USERMGMT_CONF); 808 } 809 fp = fopen(_PATH_USERMGMT_CONF, "r"); 810 } 811 if (fp != NULL) { 812 while ((s = fparseln(fp, &len, &lineno, NULL, 0)) != NULL) { 813 if (strncmp(s, "group", 5) == 0) { 814 cp = skipspace(s + 5); 815 memsave(&up->u_primgrp, (char *)cp, strlen(cp)); 816 } else if (strncmp(s, "base_dir", 8) == 0) { 817 cp = skipspace(s + 8); 818 memsave(&up->u_basedir, (char *)cp, strlen(cp)); 819 } else if (strncmp(s, "skel_dir", 8) == 0) { 820 cp = skipspace(s + 8); 821 memsave(&up->u_skeldir, (char *)cp, strlen(cp)); 822 } else if (strncmp(s, "shell", 5) == 0) { 823 cp = skipspace(s + 5); 824 memsave(&up->u_shell, cp, strlen(cp)); 825 #ifdef EXTENSIONS 826 } else if (strncmp((char *)s, "class", 5) == 0) { 827 cp = skipspace(s + 5); 828 memsave(&up->u_class, cp, strlen(cp)); 829 #endif 830 #ifdef EXTENSIONS 831 } else if (strncmp(s, "homeperm", 8) == 0) { 832 for (cp = s + 8; *cp && 833 isspace((unsigned char)*cp); cp++) 834 ; 835 up->u_homeperm = strtoul(cp, NULL, 8); 836 #endif 837 } else if (strncmp(s, "inactive", 8) == 0) { 838 cp = skipspace(s + 8); 839 if (strcmp(cp, UNSET_INACTIVE) == 0) { 840 if (up->u_inactive) { 841 FREE(up->u_inactive); 842 } 843 up->u_inactive = NULL; 844 } else { 845 memsave(&up->u_inactive, cp, strlen(cp)); 846 } 847 #ifdef EXTENSIONS 848 } else if (strncmp(s, "range", 5) == 0) { 849 cp = skipspace(s + 5); 850 (void)save_range(up, cp); 851 #endif 852 #ifdef EXTENSIONS 853 } else if (strncmp(s, "preserve", 8) == 0) { 854 cp = skipspace(s + 8); 855 up->u_preserve = 856 (strncmp(cp, "true", 4) == 0) ? 1 : 857 (strncmp(cp, "yes", 3) == 0) ? 1 : atoi(cp); 858 #endif 859 } else if (strncmp(s, "expire", 6) == 0) { 860 cp = skipspace(s + 6); 861 if (strcmp(cp, UNSET_EXPIRY) == 0) { 862 if (up->u_expire) { 863 FREE(up->u_expire); 864 } 865 up->u_expire = NULL; 866 } else { 867 memsave(&up->u_expire, cp, strlen(cp)); 868 } 869 } 870 (void)free(s); 871 } 872 (void)fclose(fp); 873 } 874 if (up->u_rc == 0) { 875 up->u_rv[up->u_rc].r_from = DEF_LOWUID; 876 up->u_rv[up->u_rc].r_to = DEF_HIGHUID; 877 up->u_rc += 1; 878 } 879 up->u_defrc = up->u_rc; 880 up->u_homeperm = DEF_HOMEPERM; 881 } 882 883 /* return the next valid unused uid */ 884 static int 885 getnextuid(int sync_uid_gid, int *uid, int low_uid, int high_uid) 886 { 887 for (*uid = low_uid ; *uid <= high_uid ; (*uid)++) { 888 if (getpwuid((uid_t)(*uid)) == NULL && *uid != NOBODY_UID) { 889 if (sync_uid_gid) { 890 if (getgrgid((gid_t)(*uid)) == NULL) { 891 return 1; 892 } 893 } else { 894 return 1; 895 } 896 } 897 } 898 return 0; 899 } 900 901 /* structure which defines a password type */ 902 typedef struct passwd_type_t { 903 const char *type; /* optional type descriptor */ 904 size_t desc_length; /* length of type descriptor */ 905 size_t length; /* length of password */ 906 const char *regex; /* regexp to output the password */ 907 size_t re_sub; /* subscript of regexp to use */ 908 } passwd_type_t; 909 910 static passwd_type_t passwd_types[] = { 911 { "$sha1", 5, 28, "\\$[^$]+\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* SHA1 */ 912 { "$2a", 3, 54, "\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* Blowfish */ 913 { "$1", 2, 34, NULL, 0 }, /* MD5 */ 914 { "", 0, DES_Len,NULL, 0 }, /* standard DES */ 915 { NULL, (size_t)~0, (size_t)~0, NULL, 0 } 916 /* none - terminate search */ 917 }; 918 919 /* return non-zero if it's a valid password - check length for cipher type */ 920 static int 921 valid_password_length(char *newpasswd) 922 { 923 passwd_type_t *pwtp; 924 regmatch_t matchv[10]; 925 regex_t r; 926 927 for (pwtp = passwd_types; pwtp->desc_length != (size_t)~0; pwtp++) { 928 if (strncmp(newpasswd, pwtp->type, pwtp->desc_length) == 0) { 929 if (pwtp->regex == NULL) { 930 return strlen(newpasswd) == pwtp->length; 931 } 932 (void)regcomp(&r, pwtp->regex, REG_EXTENDED); 933 if (regexec(&r, newpasswd, 10, matchv, 0) == 0) { 934 regfree(&r); 935 return (int)(matchv[pwtp->re_sub].rm_eo - 936 matchv[pwtp->re_sub].rm_so + 1) == 937 pwtp->length; 938 } 939 regfree(&r); 940 } 941 } 942 return 0; 943 } 944 945 #ifdef EXTENSIONS 946 /* return 1 if `class' is a valid login class */ 947 static int 948 valid_class(char *class) 949 { 950 login_cap_t *lc; 951 952 if (class == NULL || *class == '\0') { 953 return 1; 954 } 955 /* 956 * Check if /etc/login.conf exists. login_getclass() will 957 * return 1 due to it not existing, so not informing the 958 * user the actual login class does not exist. 959 */ 960 961 if (access(PATH_LOGINCONF, R_OK) == -1) { 962 warn("Access failed for `%s'; will not validate class `%s'", 963 PATH_LOGINCONF, class); 964 return 1; 965 } 966 967 if ((lc = login_getclass(class)) != NULL) { 968 login_close(lc); 969 return 1; 970 } 971 return 0; 972 } 973 974 /* return 1 if the `shellname' is a valid user shell */ 975 static int 976 valid_shell(const char *shellname) 977 { 978 char *shellp; 979 980 if (access(_PATH_SHELLS, R_OK) == -1) { 981 /* Don't exit */ 982 warn("Access failed for `%s'; will not validate shell `%s'", 983 _PATH_SHELLS, shellname); 984 return 1; 985 } 986 987 /* if nologin is used as a shell, consider it a valid shell */ 988 if (strcmp(shellname, NOLOGIN) == 0) 989 return 1; 990 991 while ((shellp = getusershell()) != NULL) 992 if (strcmp(shellp, shellname) == 0) 993 return 1; 994 995 warnx("Shell `%s' not found in `%s'", shellname, _PATH_SHELLS); 996 997 return access(shellname, X_OK) != -1; 998 } 999 #endif 1000 1001 /* look for a valid time, return 0 if it was specified but bad */ 1002 static int 1003 scantime(time_t *tp, char *s) 1004 { 1005 struct tm tm; 1006 char *ep; 1007 long val; 1008 1009 *tp = 0; 1010 if (s != NULL) { 1011 (void)memset(&tm, 0, sizeof(tm)); 1012 if (strptime(s, "%c", &tm) != NULL) { 1013 *tp = mktime(&tm); 1014 return (*tp == -1) ? 0 : 1; 1015 } else if (strptime(s, "%B %d %Y", &tm) != NULL) { 1016 *tp = mktime(&tm); 1017 return (*tp == -1) ? 0 : 1; 1018 } else { 1019 errno = 0; 1020 *tp = val = strtol(s, &ep, 10); 1021 if (*ep != '\0' || *tp < -1 || errno == ERANGE) { 1022 *tp = 0; 1023 return 0; 1024 } 1025 if (*tp != val) { 1026 return 0; 1027 } 1028 } 1029 } 1030 return 1; 1031 } 1032 1033 /* add a user */ 1034 static int 1035 adduser(char *login_name, user_t *up) 1036 { 1037 struct group *grp; 1038 struct stat st; 1039 time_t expire; 1040 time_t inactive; 1041 char password[PasswordLength + 1]; 1042 char home[MaxFileNameLen]; 1043 char buf[MaxFileNameLen]; 1044 int sync_uid_gid; 1045 int masterfd; 1046 int ptmpfd; 1047 int gid; 1048 int cc; 1049 int i; 1050 1051 if (!valid_login(login_name, up->u_allow_samba)) { 1052 errx(EXIT_FAILURE, "Can't add user `%s': invalid login name", login_name); 1053 } 1054 #ifdef EXTENSIONS 1055 if (!valid_class(up->u_class)) { 1056 errx(EXIT_FAILURE, "Can't add user `%s': no such login class `%s'", 1057 login_name, up->u_class); 1058 } 1059 #endif 1060 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1061 err(EXIT_FAILURE, "Can't add user `%s': can't open `%s'", 1062 login_name, _PATH_MASTERPASSWD); 1063 } 1064 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1065 err(EXIT_FAILURE, "Can't add user `%s': can't lock `%s'", 1066 login_name, _PATH_MASTERPASSWD); 1067 } 1068 pw_init(); 1069 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1070 int serrno = errno; 1071 (void)close(masterfd); 1072 errno = serrno; 1073 err(EXIT_FAILURE, "Can't add user `%s': can't obtain pw_lock", 1074 login_name); 1075 } 1076 while ((cc = read(masterfd, buf, sizeof(buf))) > 0) { 1077 if (write(ptmpfd, buf, (size_t)(cc)) != cc) { 1078 int serrno = errno; 1079 (void)close(masterfd); 1080 (void)close(ptmpfd); 1081 (void)pw_abort(); 1082 errno = serrno; 1083 err(EXIT_FAILURE, "Can't add user `%s': " 1084 "short write to /etc/ptmp", login_name); 1085 } 1086 } 1087 /* if no uid was specified, get next one in [low_uid..high_uid] range */ 1088 sync_uid_gid = (strcmp(up->u_primgrp, "=uid") == 0); 1089 if (up->u_uid == -1) { 1090 int got_id = 0; 1091 1092 /* 1093 * Look for a free UID in the command line ranges (if any). 1094 * These start after the ranges specified in the config file. 1095 */ 1096 for (i = up->u_defrc; !got_id && i < up->u_rc ; i++) { 1097 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1098 up->u_rv[i].r_from, up->u_rv[i].r_to); 1099 } 1100 /* 1101 * If there were no free UIDs in the command line ranges, 1102 * try the ranges from the config file (there will always 1103 * be at least one default). 1104 */ 1105 for (i = 0; !got_id && i < up->u_defrc; i++) { 1106 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1107 up->u_rv[i].r_from, up->u_rv[i].r_to); 1108 } 1109 if (!got_id) { 1110 (void)close(ptmpfd); 1111 (void)pw_abort(); 1112 errx(EXIT_FAILURE, "Can't add user `%s': " 1113 "can't get next uid for %d", login_name, 1114 up->u_uid); 1115 } 1116 } 1117 /* check uid isn't already allocated */ 1118 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1119 (void)close(ptmpfd); 1120 (void)pw_abort(); 1121 errx(EXIT_FAILURE, "Can't add user `%s': " 1122 "uid %d is already in use", login_name, up->u_uid); 1123 } 1124 /* if -g=uid was specified, check gid is unused */ 1125 if (sync_uid_gid) { 1126 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1127 (void)close(ptmpfd); 1128 (void)pw_abort(); 1129 errx(EXIT_FAILURE, "Can't add user `%s': " 1130 "gid %d is already in use", login_name, 1131 up->u_uid); 1132 } 1133 gid = up->u_uid; 1134 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1135 gid = grp->gr_gid; 1136 } else if (is_number(up->u_primgrp) && 1137 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1138 gid = grp->gr_gid; 1139 } else { 1140 (void)close(ptmpfd); 1141 (void)pw_abort(); 1142 errx(EXIT_FAILURE, "Can't add user `%s': group %s not found", 1143 login_name, up->u_primgrp); 1144 } 1145 /* check name isn't already in use */ 1146 if (!(up->u_flags & F_DUPUID) && getpwnam(login_name) != NULL) { 1147 (void)close(ptmpfd); 1148 (void)pw_abort(); 1149 errx(EXIT_FAILURE, "Can't add user `%s': " 1150 "`%s' is already a user", login_name, login_name); 1151 } 1152 if (up->u_flags & F_HOMEDIR) { 1153 (void)strlcpy(home, up->u_home, sizeof(home)); 1154 } else { 1155 /* if home directory hasn't been given, make it up */ 1156 (void)snprintf(home, sizeof(home), "%s/%s", up->u_basedir, 1157 login_name); 1158 } 1159 if (up->u_flags & F_SHELL) { 1160 #ifdef EXTENSIONS 1161 if (!valid_shell(up->u_shell)) { 1162 int oerrno = errno; 1163 (void)close(ptmpfd); 1164 (void)pw_abort(); 1165 errno = oerrno; 1166 errx(EXIT_FAILURE, "Can't add user `%s': " 1167 "Cannot access shell `%s'", 1168 login_name, up->u_shell); 1169 } 1170 #endif 1171 } 1172 1173 if (!scantime(&inactive, up->u_inactive)) { 1174 warnx("Warning: inactive time `%s' invalid, password expiry off", 1175 up->u_inactive); 1176 } 1177 if (!scantime(&expire, up->u_expire) || expire == -1) { 1178 warnx("Warning: expire time `%s' invalid, account expiry off", 1179 up->u_expire); 1180 expire = 0; /* Just in case. */ 1181 } 1182 if (lstat(home, &st) < 0 && !(up->u_flags & F_MKDIR)) { 1183 warnx("Warning: home directory `%s' doesn't exist, " 1184 "and -m was not specified", home); 1185 } 1186 password[sizeof(password) - 1] = '\0'; 1187 if (up->u_password != NULL && valid_password_length(up->u_password)) { 1188 (void)strlcpy(password, up->u_password, sizeof(password)); 1189 } else { 1190 (void)memset(password, '*', DES_Len); 1191 password[DES_Len] = 0; 1192 if (up->u_password != NULL) { 1193 warnx("Password `%s' is invalid: setting it to `%s'", 1194 up->u_password, password); 1195 } 1196 } 1197 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1198 login_name, 1199 password, 1200 up->u_uid, 1201 gid, 1202 #ifdef EXTENSIONS 1203 up->u_class, 1204 #else 1205 "", 1206 #endif 1207 (long) inactive, 1208 (long) expire, 1209 up->u_comment, 1210 home, 1211 up->u_shell); 1212 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1213 int serrno = errno; 1214 (void)close(ptmpfd); 1215 (void)pw_abort(); 1216 errno = serrno; 1217 err(EXIT_FAILURE, "Can't add user `%s': write failed", 1218 login_name); 1219 } 1220 if (up->u_flags & F_MKDIR) { 1221 if (lstat(home, &st) == 0) { 1222 (void)close(ptmpfd); 1223 (void)pw_abort(); 1224 errx(EXIT_FAILURE, 1225 "Can't add user `%s': home directory `%s' " 1226 "already exists", login_name, home); 1227 } else { 1228 if (asystem("%s -p %s", MKDIR, home) != 0) { 1229 (void)close(ptmpfd); 1230 (void)pw_abort(); 1231 errx(EXIT_FAILURE, "Can't add user `%s': " 1232 "can't mkdir `%s'", login_name, home); 1233 } 1234 (void)copydotfiles(up->u_skeldir, up->u_uid, gid, home, 1235 up->u_homeperm); 1236 } 1237 } 1238 if (strcmp(up->u_primgrp, "=uid") == 0 && 1239 getgrnam(login_name) == NULL && 1240 !creategid(login_name, gid, login_name)) { 1241 (void)close(ptmpfd); 1242 (void)pw_abort(); 1243 errx(EXIT_FAILURE, "Can't add user `%s': can't create gid %d ", 1244 login_name, gid); 1245 } 1246 if (up->u_groupc > 0 && 1247 !append_group(login_name, up->u_groupc, up->u_groupv)) { 1248 (void)close(ptmpfd); 1249 (void)pw_abort(); 1250 errx(EXIT_FAILURE, "Can't add user `%s': can't append " 1251 "to new groups", login_name); 1252 } 1253 (void)close(ptmpfd); 1254 #if PW_MKDB_ARGC == 2 1255 if (pw_mkdb(login_name, 0) < 0) 1256 #else 1257 if (pw_mkdb() < 0) 1258 #endif 1259 { 1260 (void)pw_abort(); 1261 errx(EXIT_FAILURE, "Can't add user `%s': pw_mkdb failed", 1262 login_name); 1263 } 1264 syslog(LOG_INFO, "New user added: name=%s, uid=%d, gid=%d, home=%s, " 1265 "shell=%s", login_name, up->u_uid, gid, home, up->u_shell); 1266 return 1; 1267 } 1268 1269 /* remove a user from the groups file */ 1270 static int 1271 rm_user_from_groups(char *login_name) 1272 { 1273 struct stat st; 1274 regmatch_t matchv[10]; 1275 regex_t r; 1276 FILE *from; 1277 FILE *to; 1278 char line[MaxEntryLen]; 1279 char buf[MaxEntryLen]; 1280 char f[MaxFileNameLen]; 1281 int fd; 1282 int cc; 1283 int sc; 1284 1285 (void)snprintf(line, sizeof(line), "(:|,)(%s)(,|$)", login_name); 1286 if ((sc = regcomp(&r, line, REG_EXTENDED|REG_NEWLINE)) != 0) { 1287 (void)regerror(sc, &r, buf, sizeof(buf)); 1288 warnx("Can't compile regular expression `%s' (%s)", line, 1289 buf); 1290 return 0; 1291 } 1292 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 1293 warn("Can't remove user `%s' from `%s': can't open `%s'", 1294 login_name, _PATH_GROUP, _PATH_GROUP); 1295 return 0; 1296 } 1297 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 1298 warn("Can't remove user `%s' from `%s': can't lock `%s'", 1299 login_name, _PATH_GROUP, _PATH_GROUP); 1300 (void)fclose(from); 1301 return 0; 1302 } 1303 (void)fstat(fileno(from), &st); 1304 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 1305 if ((fd = mkstemp(f)) < 0) { 1306 warn("Can't remove user `%s' from `%s': mkstemp failed", 1307 login_name, _PATH_GROUP); 1308 (void)fclose(from); 1309 return 0; 1310 } 1311 if ((to = fdopen(fd, "w")) == NULL) { 1312 warn("Can't remove user `%s' from `%s': fdopen `%s' failed", 1313 login_name, _PATH_GROUP, f); 1314 (void)fclose(from); 1315 (void)close(fd); 1316 (void)unlink(f); 1317 return 0; 1318 } 1319 while (fgets(buf, sizeof(buf), from) != NULL) { 1320 cc = strlen(buf); 1321 if (regexec(&r, buf, 10, matchv, 0) == 0) { 1322 if (buf[(int)matchv[1].rm_so] == ',') { 1323 matchv[2].rm_so = matchv[1].rm_so; 1324 } else if (matchv[2].rm_eo != matchv[3].rm_eo) { 1325 matchv[2].rm_eo = matchv[3].rm_eo; 1326 } 1327 cc -= (int) matchv[2].rm_eo; 1328 sc = (int) matchv[2].rm_so; 1329 if (fwrite(buf, sizeof(char), (size_t)sc, to) != sc || 1330 fwrite(&buf[(int)matchv[2].rm_eo], sizeof(char), 1331 (size_t)cc, to) != cc) { 1332 warn("Can't remove user `%s' from `%s': " 1333 "short write to `%s'", login_name, 1334 _PATH_GROUP, f); 1335 (void)fclose(from); 1336 (void)close(fd); 1337 (void)unlink(f); 1338 return 0; 1339 } 1340 } else if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 1341 warn("Can't remove user `%s' from `%s': " 1342 "short write to `%s'", login_name, _PATH_GROUP, f); 1343 (void)fclose(from); 1344 (void)close(fd); 1345 (void)unlink(f); 1346 return 0; 1347 } 1348 } 1349 (void)fclose(from); 1350 (void)fclose(to); 1351 if (rename(f, _PATH_GROUP) < 0) { 1352 warn("Can't remove user `%s' from `%s': " 1353 "can't rename `%s' to `%s'", 1354 login_name, _PATH_GROUP, f, _PATH_GROUP); 1355 (void)unlink(f); 1356 return 0; 1357 } 1358 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 1359 return 1; 1360 } 1361 1362 /* check that the user or group is local, not from YP/NIS */ 1363 static int 1364 is_local(char *name, const char *file) 1365 { 1366 FILE *fp; 1367 char buf[MaxEntryLen]; 1368 size_t len; 1369 int ret; 1370 1371 if ((fp = fopen(file, "r")) == NULL) { 1372 err(EXIT_FAILURE, "Can't open `%s'", file); 1373 } 1374 len = strlen(name); 1375 for (ret = 0 ; fgets(buf, sizeof(buf), fp) != NULL ; ) { 1376 if (strncmp(buf, name, len) == 0 && buf[len] == ':') { 1377 ret = 1; 1378 break; 1379 } 1380 } 1381 (void)fclose(fp); 1382 return ret; 1383 } 1384 1385 /* modify a user */ 1386 static int 1387 moduser(char *login_name, char *newlogin, user_t *up, int allow_samba) 1388 { 1389 struct passwd *pwp; 1390 struct group *grp; 1391 const char *homedir; 1392 char *locked_pwd; 1393 size_t colonc; 1394 size_t loginc; 1395 size_t len; 1396 FILE *master; 1397 char newdir[MaxFileNameLen]; 1398 char buf[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 ((pwp = getpwnam(login_name)) == NULL) { 1409 errx(EXIT_FAILURE, "Can't modify user `%s': no such user", 1410 login_name); 1411 } 1412 if (!is_local(login_name, _PATH_MASTERPASSWD)) { 1413 errx(EXIT_FAILURE, "Can't modify user `%s': must be a local user", 1414 login_name); 1415 } 1416 /* keep dir name in case we need it for '-m' */ 1417 homedir = pwp->pw_dir; 1418 1419 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1420 err(EXIT_FAILURE, "Can't modify user `%s': can't open `%s'", 1421 login_name, _PATH_MASTERPASSWD); 1422 } 1423 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1424 err(EXIT_FAILURE, "Can't modify user `%s': can't lock `%s'", 1425 login_name, _PATH_MASTERPASSWD); 1426 } 1427 pw_init(); 1428 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1429 int serrno = errno; 1430 (void)close(masterfd); 1431 errno = serrno; 1432 err(EXIT_FAILURE, "Can't modify user `%s': " 1433 "can't obtain pw_lock", login_name); 1434 } 1435 if ((master = fdopen(masterfd, "r")) == NULL) { 1436 int serrno = errno; 1437 (void)close(masterfd); 1438 (void)close(ptmpfd); 1439 (void)pw_abort(); 1440 errno = serrno; 1441 err(EXIT_FAILURE, "Can't modify user `%s': " 1442 "fdopen fd for %s", login_name, _PATH_MASTERPASSWD); 1443 } 1444 if (up != NULL) { 1445 if (up->u_flags & F_USERNAME) { 1446 /* 1447 * If changing name, 1448 * check new name isn't already in use 1449 */ 1450 if (strcmp(login_name, newlogin) != 0 && 1451 getpwnam(newlogin) != NULL) { 1452 (void)close(ptmpfd); 1453 (void)pw_abort(); 1454 errx(EXIT_FAILURE, "Can't modify user `%s': " 1455 "`%s' is already a user", login_name, 1456 newlogin); 1457 } 1458 pwp->pw_name = newlogin; 1459 1460 /* 1461 * Provide a new directory name in case the 1462 * home directory is to be moved. 1463 */ 1464 if (up->u_flags & F_MKDIR) { 1465 (void)snprintf(newdir, sizeof(newdir), "%s/%s", 1466 up->u_basedir, newlogin); 1467 pwp->pw_dir = newdir; 1468 } 1469 } 1470 if (up->u_flags & F_PASSWORD) { 1471 if (up->u_password != NULL) { 1472 if (!valid_password_length(up->u_password)) { 1473 (void)close(ptmpfd); 1474 (void)pw_abort(); 1475 errx(EXIT_FAILURE, 1476 "Can't modify user `%s': " 1477 "invalid password: `%s'", 1478 login_name, up->u_password); 1479 } 1480 if ((locked_pwd = 1481 strstr(pwp->pw_passwd, LOCKED)) != NULL) { 1482 /* 1483 * account is locked - keep it locked 1484 * and just change the password. 1485 */ 1486 if (asprintf(&locked_pwd, "%s%s", 1487 LOCKED, up->u_password) == -1) { 1488 (void)close(ptmpfd); 1489 (void)pw_abort(); 1490 err(EXIT_FAILURE, 1491 "Can't modify user `%s': " 1492 "asprintf failed", 1493 login_name); 1494 } 1495 pwp->pw_passwd = locked_pwd; 1496 } else { 1497 pwp->pw_passwd = up->u_password; 1498 } 1499 } 1500 } 1501 1502 /* check whether we should lock the account. */ 1503 if (up->u_locked == LOCK) { 1504 /* check to see account if already locked. */ 1505 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1506 != NULL) { 1507 warnx("Account is already locked"); 1508 } else { 1509 if (asprintf(&locked_pwd, "%s%s", LOCKED, 1510 pwp->pw_passwd) == -1) { 1511 (void)close(ptmpfd); 1512 (void)pw_abort(); 1513 err(EXIT_FAILURE, 1514 "Can't modify user `%s': " 1515 "asprintf failed", login_name); 1516 } 1517 pwp->pw_passwd = locked_pwd; 1518 } 1519 } else if (up->u_locked == UNLOCK) { 1520 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1521 == NULL) { 1522 warnx("Can't modify user `%s': " 1523 "account is not locked", login_name); 1524 } else { 1525 pwp->pw_passwd = locked_pwd + strlen(LOCKED); 1526 } 1527 } 1528 1529 if (up->u_flags & F_UID) { 1530 /* check uid isn't already allocated */ 1531 if (!(up->u_flags & F_DUPUID) && 1532 getpwuid((uid_t)(up->u_uid)) != NULL) { 1533 (void)close(ptmpfd); 1534 (void)pw_abort(); 1535 errx(EXIT_FAILURE, "Can't modify user `%s': " 1536 "uid `%d' is already in use", login_name, 1537 up->u_uid); 1538 } 1539 pwp->pw_uid = up->u_uid; 1540 } 1541 if (up->u_flags & F_GROUP) { 1542 /* if -g=uid was specified, check gid is unused */ 1543 if (strcmp(up->u_primgrp, "=uid") == 0) { 1544 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1545 (void)close(ptmpfd); 1546 (void)pw_abort(); 1547 errx(EXIT_FAILURE, 1548 "Can't modify user `%s': " 1549 "gid %d is already in use", 1550 login_name, up->u_uid); 1551 } 1552 pwp->pw_gid = up->u_uid; 1553 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1554 pwp->pw_gid = grp->gr_gid; 1555 } else if (is_number(up->u_primgrp) && 1556 (grp = getgrgid( 1557 (gid_t)atoi(up->u_primgrp))) != NULL) { 1558 pwp->pw_gid = grp->gr_gid; 1559 } else { 1560 (void)close(ptmpfd); 1561 (void)pw_abort(); 1562 errx(EXIT_FAILURE, "Can't modify user `%s': " 1563 "group %s not found", login_name, 1564 up->u_primgrp); 1565 } 1566 } 1567 if (up->u_flags & F_INACTIVE) { 1568 if (!scantime(&pwp->pw_change, up->u_inactive)) { 1569 warnx("Warning: inactive time `%s' invalid, " 1570 "password expiry off", 1571 up->u_inactive); 1572 } 1573 } 1574 if (up->u_flags & F_EXPIRE) { 1575 if (!scantime(&pwp->pw_expire, up->u_expire) || 1576 pwp->pw_expire == -1) { 1577 warnx("Warning: expire time `%s' invalid, " 1578 "account expiry off", 1579 up->u_expire); 1580 pwp->pw_expire = 0; 1581 } 1582 } 1583 if (up->u_flags & F_COMMENT) { 1584 pwp->pw_gecos = up->u_comment; 1585 } 1586 if (up->u_flags & F_HOMEDIR) { 1587 pwp->pw_dir = up->u_home; 1588 } 1589 if (up->u_flags & F_SHELL) { 1590 #ifdef EXTENSIONS 1591 if (!valid_shell(up->u_shell)) { 1592 int oerrno = errno; 1593 (void)close(ptmpfd); 1594 (void)pw_abort(); 1595 errno = oerrno; 1596 errx(EXIT_FAILURE, "Can't modify user `%s': " 1597 "Cannot access shell `%s'", 1598 login_name, up->u_shell); 1599 } 1600 pwp->pw_shell = up->u_shell; 1601 #else 1602 pwp->pw_shell = up->u_shell; 1603 #endif 1604 } 1605 #ifdef EXTENSIONS 1606 if (up->u_flags & F_CLASS) { 1607 if (!valid_class(up->u_class)) { 1608 (void)close(ptmpfd); 1609 (void)pw_abort(); 1610 errx(EXIT_FAILURE, "Can't modify user `%s': " 1611 "no such login class `%s'", login_name, 1612 up->u_class); 1613 } 1614 pwp->pw_class = up->u_class; 1615 } 1616 #endif 1617 } 1618 loginc = strlen(login_name); 1619 while (fgets(buf, sizeof(buf), master) != NULL) { 1620 if ((colon = strchr(buf, ':')) == NULL) { 1621 warnx("Malformed entry `%s'. Skipping", buf); 1622 continue; 1623 } 1624 colonc = (size_t)(colon - buf); 1625 if (strncmp(login_name, buf, loginc) == 0 && loginc == colonc) { 1626 if (up != NULL) { 1627 len = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:" 1628 #ifdef EXTENSIONS 1629 "%s" 1630 #endif 1631 ":%ld:%ld:%s:%s:%s\n", 1632 newlogin, 1633 pwp->pw_passwd, 1634 pwp->pw_uid, 1635 pwp->pw_gid, 1636 #ifdef EXTENSIONS 1637 pwp->pw_class, 1638 #endif 1639 (long)pwp->pw_change, 1640 (long)pwp->pw_expire, 1641 pwp->pw_gecos, 1642 pwp->pw_dir, 1643 pwp->pw_shell); 1644 if (write(ptmpfd, buf, len) != len) { 1645 int serrno = errno; 1646 (void)close(ptmpfd); 1647 (void)pw_abort(); 1648 errno = serrno; 1649 err(EXIT_FAILURE, "Can't modify user " 1650 "`%s': write", login_name); 1651 } 1652 } 1653 } else { 1654 len = strlen(buf); 1655 if (write(ptmpfd, buf, len) != len) { 1656 int serrno = errno; 1657 (void)close(masterfd); 1658 (void)close(ptmpfd); 1659 (void)pw_abort(); 1660 errno = serrno; 1661 err(EXIT_FAILURE, "Can't modify `%s': " 1662 "write", login_name); 1663 } 1664 } 1665 } 1666 if (up != NULL) { 1667 if ((up->u_flags & F_MKDIR) && 1668 asystem("%s %s %s", MV, homedir, pwp->pw_dir) != 0) { 1669 (void)close(ptmpfd); 1670 (void)pw_abort(); 1671 errx(EXIT_FAILURE, "Can't modify user `%s': " 1672 "can't move `%s' to `%s'", 1673 login_name, homedir, pwp->pw_dir); 1674 } 1675 if (up->u_groupc > 0 && 1676 !append_group(newlogin, up->u_groupc, up->u_groupv)) { 1677 (void)close(ptmpfd); 1678 (void)pw_abort(); 1679 errx(EXIT_FAILURE, "Can't modify user `%s': " 1680 "can't append `%s' to new groups", 1681 login_name, newlogin); 1682 } 1683 } 1684 (void)close(ptmpfd); 1685 (void)fclose(master); 1686 #if PW_MKDB_ARGC == 2 1687 if (up != NULL && strcmp(login_name, newlogin) == 0) { 1688 error = pw_mkdb(login_name, 0); 1689 } else { 1690 error = pw_mkdb(NULL, 0); 1691 } 1692 #else 1693 error = pw_mkdb(); 1694 #endif 1695 if (error < 0) { 1696 (void)pw_abort(); 1697 errx(EXIT_FAILURE, "Can't modify user `%s': pw_mkdb failed", 1698 login_name); 1699 } 1700 if (up == NULL) { 1701 syslog(LOG_INFO, "User removed: name=%s", login_name); 1702 } else if (strcmp(login_name, newlogin) == 0) { 1703 syslog(LOG_INFO, "User information modified: name=%s, uid=%d, " 1704 "gid=%d, home=%s, shell=%s", 1705 login_name, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, 1706 pwp->pw_shell); 1707 } else { 1708 syslog(LOG_INFO, "User information modified: name=%s, " 1709 "new name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1710 login_name, newlogin, pwp->pw_uid, pwp->pw_gid, 1711 pwp->pw_dir, pwp->pw_shell); 1712 } 1713 return 1; 1714 } 1715 1716 #ifdef EXTENSIONS 1717 /* see if we can find out the user struct */ 1718 static struct passwd * 1719 find_user_info(const char *name) 1720 { 1721 struct passwd *pwp; 1722 1723 if ((pwp = getpwnam(name)) != NULL) { 1724 return pwp; 1725 } 1726 if (is_number(name) && (pwp = getpwuid((uid_t)atoi(name))) != NULL) { 1727 return pwp; 1728 } 1729 return NULL; 1730 } 1731 #endif 1732 1733 /* see if we can find out the group struct */ 1734 static struct group * 1735 find_group_info(const char *name) 1736 { 1737 struct group *grp; 1738 1739 if ((grp = getgrnam(name)) != NULL) { 1740 return grp; 1741 } 1742 if (is_number(name) && (grp = getgrgid((gid_t)atoi(name))) != NULL) { 1743 return grp; 1744 } 1745 return NULL; 1746 } 1747 1748 /* print out usage message, and then exit */ 1749 void 1750 usermgmt_usage(const char *prog) 1751 { 1752 if (strcmp(prog, "useradd") == 0) { 1753 (void)fprintf(stderr, "usage: %s -D [-F] [-b base-dir] " 1754 "[-e expiry-time] [-f inactive-time]\n" 1755 "\t[-g gid | name | =uid] [-k skel-dir] [-L login-class]\n" 1756 "\t[-M homeperm] [-r lowuid..highuid] [-s shell]\n", prog); 1757 (void)fprintf(stderr, "usage: %s [-moSv] [-b base-dir] " 1758 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1759 "\t[-f inactive-time] [-G secondary-group] " 1760 "[-g gid | name | =uid]\n" 1761 "\t[-k skeletondir] [-L login-class] [-M homeperm] " 1762 "[-p password]\n" 1763 "\t[-r lowuid..highuid] [-s shell] [-u uid] user\n", 1764 prog); 1765 } else if (strcmp(prog, "usermod") == 0) { 1766 (void)fprintf(stderr, "usage: %s [-FmoSv] [-C yes/no] " 1767 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1768 "\t[-f inactive] [-G secondary-group] " 1769 "[-g gid | name | =uid]\n" 1770 "\t[-L login-class] [-l new-login] [-p password] " 1771 "[-s shell] [-u uid]\n" 1772 "\tuser\n", prog); 1773 } else if (strcmp(prog, "userdel") == 0) { 1774 (void)fprintf(stderr, "usage: %s -D [-p preserve-value]\n", prog); 1775 (void)fprintf(stderr, 1776 "usage: %s [-rSv] [-p preserve-value] user\n", prog); 1777 #ifdef EXTENSIONS 1778 } else if (strcmp(prog, "userinfo") == 0) { 1779 (void)fprintf(stderr, "usage: %s [-ev] user\n", prog); 1780 #endif 1781 } else if (strcmp(prog, "groupadd") == 0) { 1782 (void)fprintf(stderr, "usage: %s [-ov] [-g gid]" 1783 " [-r lowgid..highgid] group\n", prog); 1784 } else if (strcmp(prog, "groupdel") == 0) { 1785 (void)fprintf(stderr, "usage: %s [-v] group\n", prog); 1786 } else if (strcmp(prog, "groupmod") == 0) { 1787 (void)fprintf(stderr, 1788 "usage: %s [-ov] [-g gid] [-n newname] group\n", prog); 1789 } else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) { 1790 (void)fprintf(stderr, 1791 "usage: %s ( add | del | mod | info ) ...\n", prog); 1792 #ifdef EXTENSIONS 1793 } else if (strcmp(prog, "groupinfo") == 0) { 1794 (void)fprintf(stderr, "usage: %s [-ev] group\n", prog); 1795 #endif 1796 } 1797 exit(EXIT_FAILURE); 1798 /* NOTREACHED */ 1799 } 1800 1801 #ifdef EXTENSIONS 1802 #define ADD_OPT_EXTENSIONS "M:p:r:vL:S" 1803 #else 1804 #define ADD_OPT_EXTENSIONS 1805 #endif 1806 1807 int 1808 useradd(int argc, char **argv) 1809 { 1810 user_t u; 1811 int defaultfield; 1812 int bigD; 1813 int c; 1814 #ifdef EXTENSIONS 1815 int i; 1816 #endif 1817 1818 (void)memset(&u, 0, sizeof(u)); 1819 read_defaults(&u); 1820 u.u_uid = -1; 1821 defaultfield = bigD = 0; 1822 while ((c = getopt(argc, argv, "DFG:b:c:d:e:f:g:k:mou:s:" 1823 ADD_OPT_EXTENSIONS)) != -1) { 1824 switch(c) { 1825 case 'D': 1826 bigD = 1; 1827 break; 1828 case 'F': 1829 /* 1830 * Setting -1 will force the new user to 1831 * change their password as soon as they 1832 * next log in - passwd(5). 1833 */ 1834 defaultfield = 1; 1835 memsave(&u.u_inactive, "-1", strlen("-1")); 1836 break; 1837 case 'G': 1838 while (u.u_groupc < NGROUPS_MAX && 1839 (u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL) { 1840 if (u.u_groupv[u.u_groupc][0] != 0) { 1841 u.u_groupc++; 1842 } 1843 } 1844 if (optarg != NULL) { 1845 warnx("Truncated list of secondary groups " 1846 "to %d entries", NGROUPS_MAX); 1847 } 1848 break; 1849 #ifdef EXTENSIONS 1850 case 'S': 1851 u.u_allow_samba = 1; 1852 break; 1853 #endif 1854 case 'b': 1855 defaultfield = 1; 1856 memsave(&u.u_basedir, optarg, strlen(optarg)); 1857 break; 1858 case 'c': 1859 memsave(&u.u_comment, optarg, strlen(optarg)); 1860 break; 1861 case 'd': 1862 memsave(&u.u_home, optarg, strlen(optarg)); 1863 u.u_flags |= F_HOMEDIR; 1864 break; 1865 case 'e': 1866 defaultfield = 1; 1867 memsave(&u.u_expire, optarg, strlen(optarg)); 1868 break; 1869 case 'f': 1870 defaultfield = 1; 1871 memsave(&u.u_inactive, optarg, strlen(optarg)); 1872 break; 1873 case 'g': 1874 defaultfield = 1; 1875 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1876 break; 1877 case 'k': 1878 defaultfield = 1; 1879 memsave(&u.u_skeldir, optarg, strlen(optarg)); 1880 break; 1881 #ifdef EXTENSIONS 1882 case 'L': 1883 defaultfield = 1; 1884 memsave(&u.u_class, optarg, strlen(optarg)); 1885 break; 1886 #endif 1887 case 'm': 1888 u.u_flags |= F_MKDIR; 1889 break; 1890 #ifdef EXTENSIONS 1891 case 'M': 1892 defaultfield = 1; 1893 u.u_homeperm = strtoul(optarg, NULL, 8); 1894 break; 1895 #endif 1896 case 'o': 1897 u.u_flags |= F_DUPUID; 1898 break; 1899 #ifdef EXTENSIONS 1900 case 'p': 1901 memsave(&u.u_password, optarg, strlen(optarg)); 1902 break; 1903 #endif 1904 #ifdef EXTENSIONS 1905 case 'r': 1906 defaultfield = 1; 1907 (void)save_range(&u, optarg); 1908 break; 1909 #endif 1910 case 's': 1911 u.u_flags |= F_SHELL; 1912 defaultfield = 1; 1913 memsave(&u.u_shell, optarg, strlen(optarg)); 1914 break; 1915 case 'u': 1916 u.u_uid = check_numeric(optarg, "uid"); 1917 break; 1918 #ifdef EXTENSIONS 1919 case 'v': 1920 verbose = 1; 1921 break; 1922 #endif 1923 default: 1924 usermgmt_usage("useradd"); 1925 /* NOTREACHED */ 1926 } 1927 } 1928 if (bigD) { 1929 if (defaultfield) { 1930 checkeuid(); 1931 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1932 } 1933 (void)printf("group\t\t%s\n", u.u_primgrp); 1934 (void)printf("base_dir\t%s\n", u.u_basedir); 1935 (void)printf("skel_dir\t%s\n", u.u_skeldir); 1936 (void)printf("shell\t\t%s\n", u.u_shell); 1937 #ifdef EXTENSIONS 1938 (void)printf("class\t\t%s\n", u.u_class); 1939 (void)printf("homeperm\t0%o\n", u.u_homeperm); 1940 #endif 1941 (void)printf("inactive\t%s\n", (u.u_inactive == NULL) ? 1942 UNSET_INACTIVE : u.u_inactive); 1943 (void)printf("expire\t\t%s\n", (u.u_expire == NULL) ? 1944 UNSET_EXPIRY : u.u_expire); 1945 #ifdef EXTENSIONS 1946 for (i = 0 ; i < u.u_rc ; i++) { 1947 (void)printf("range\t\t%d..%d\n", 1948 u.u_rv[i].r_from, u.u_rv[i].r_to); 1949 } 1950 #endif 1951 return EXIT_SUCCESS; 1952 } 1953 argc -= optind; 1954 argv += optind; 1955 if (argc != 1) { 1956 usermgmt_usage("useradd"); 1957 } 1958 checkeuid(); 1959 openlog("useradd", LOG_PID, LOG_USER); 1960 return adduser(*argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1961 } 1962 1963 #ifdef EXTENSIONS 1964 #define MOD_OPT_EXTENSIONS "p:vL:S" 1965 #else 1966 #define MOD_OPT_EXTENSIONS 1967 #endif 1968 1969 int 1970 usermod(int argc, char **argv) 1971 { 1972 user_t u; 1973 char newuser[MaxUserNameLen + 1]; 1974 int c, have_new_user; 1975 1976 (void)memset(&u, 0, sizeof(u)); 1977 (void)memset(newuser, 0, sizeof(newuser)); 1978 read_defaults(&u); 1979 have_new_user = 0; 1980 u.u_locked = -1; 1981 while ((c = getopt(argc, argv, "C:FG:c:d:e:f:g:l:mos:u:" 1982 MOD_OPT_EXTENSIONS)) != -1) { 1983 switch(c) { 1984 case 'G': 1985 while (u.u_groupc < NGROUPS_MAX && 1986 (u.u_groupv[u.u_groupc] = 1987 strsep(&optarg, ",")) != NULL) { 1988 if (u.u_groupv[u.u_groupc][0] != 0) { 1989 u.u_groupc++; 1990 } 1991 } 1992 if (optarg != NULL) { 1993 warnx("Truncated list of secondary groups " 1994 "to %d entries", NGROUPS_MAX); 1995 } 1996 u.u_flags |= F_SECGROUP; 1997 break; 1998 #ifdef EXTENSIONS 1999 case 'S': 2000 u.u_allow_samba = 1; 2001 break; 2002 #endif 2003 case 'c': 2004 memsave(&u.u_comment, optarg, strlen(optarg)); 2005 u.u_flags |= F_COMMENT; 2006 break; 2007 case 'C': 2008 if (strcasecmp(optarg, "yes") == 0) { 2009 u.u_locked = LOCK; 2010 } else if (strcasecmp(optarg, "no") == 0) { 2011 u.u_locked = UNLOCK; 2012 } else { 2013 /* No idea. */ 2014 errx(EXIT_FAILURE, 2015 "Please type 'yes' or 'no'"); 2016 } 2017 break; 2018 case 'F': 2019 memsave(&u.u_inactive, "-1", strlen("-1")); 2020 u.u_flags |= F_INACTIVE; 2021 break; 2022 case 'd': 2023 memsave(&u.u_home, optarg, strlen(optarg)); 2024 u.u_flags |= F_HOMEDIR; 2025 break; 2026 case 'e': 2027 memsave(&u.u_expire, optarg, strlen(optarg)); 2028 u.u_flags |= F_EXPIRE; 2029 break; 2030 case 'f': 2031 memsave(&u.u_inactive, optarg, strlen(optarg)); 2032 u.u_flags |= F_INACTIVE; 2033 break; 2034 case 'g': 2035 memsave(&u.u_primgrp, optarg, strlen(optarg)); 2036 u.u_flags |= F_GROUP; 2037 break; 2038 case 'l': 2039 (void)strlcpy(newuser, optarg, sizeof(newuser)); 2040 have_new_user = 1; 2041 u.u_flags |= F_USERNAME; 2042 break; 2043 #ifdef EXTENSIONS 2044 case 'L': 2045 memsave(&u.u_class, optarg, strlen(optarg)); 2046 u.u_flags |= F_CLASS; 2047 break; 2048 #endif 2049 case 'm': 2050 u.u_flags |= F_MKDIR; 2051 break; 2052 case 'o': 2053 u.u_flags |= F_DUPUID; 2054 break; 2055 #ifdef EXTENSIONS 2056 case 'p': 2057 memsave(&u.u_password, optarg, strlen(optarg)); 2058 u.u_flags |= F_PASSWORD; 2059 break; 2060 #endif 2061 case 's': 2062 memsave(&u.u_shell, optarg, strlen(optarg)); 2063 u.u_flags |= F_SHELL; 2064 break; 2065 case 'u': 2066 u.u_uid = check_numeric(optarg, "uid"); 2067 u.u_flags |= F_UID; 2068 break; 2069 #ifdef EXTENSIONS 2070 case 'v': 2071 verbose = 1; 2072 break; 2073 #endif 2074 default: 2075 usermgmt_usage("usermod"); 2076 /* NOTREACHED */ 2077 } 2078 } 2079 if ((u.u_flags & F_MKDIR) && !(u.u_flags & F_HOMEDIR) && 2080 !(u.u_flags & F_USERNAME)) { 2081 warnx("Option 'm' useless without 'd' or 'l' -- ignored"); 2082 u.u_flags &= ~F_MKDIR; 2083 } 2084 argc -= optind; 2085 argv += optind; 2086 if (argc != 1) { 2087 usermgmt_usage("usermod"); 2088 } 2089 checkeuid(); 2090 openlog("usermod", LOG_PID, LOG_USER); 2091 return moduser(*argv, (have_new_user) ? newuser : *argv, &u, 2092 u.u_allow_samba) ? EXIT_SUCCESS : EXIT_FAILURE; 2093 } 2094 2095 #ifdef EXTENSIONS 2096 #define DEL_OPT_EXTENSIONS "Dp:vS" 2097 #else 2098 #define DEL_OPT_EXTENSIONS 2099 #endif 2100 2101 int 2102 userdel(int argc, char **argv) 2103 { 2104 struct passwd *pwp; 2105 user_t u; 2106 char password[PasswordLength + 1]; 2107 int defaultfield; 2108 int rmhome; 2109 int bigD; 2110 int c; 2111 2112 (void)memset(&u, 0, sizeof(u)); 2113 read_defaults(&u); 2114 defaultfield = bigD = rmhome = 0; 2115 while ((c = getopt(argc, argv, "r" DEL_OPT_EXTENSIONS)) != -1) { 2116 switch(c) { 2117 #ifdef EXTENSIONS 2118 case 'D': 2119 bigD = 1; 2120 break; 2121 #endif 2122 #ifdef EXTENSIONS 2123 case 'S': 2124 u.u_allow_samba = 1; 2125 break; 2126 #endif 2127 #ifdef EXTENSIONS 2128 case 'p': 2129 defaultfield = 1; 2130 u.u_preserve = (strcmp(optarg, "true") == 0) ? 1 : 2131 (strcmp(optarg, "yes") == 0) ? 1 : 2132 atoi(optarg); 2133 break; 2134 #endif 2135 case 'r': 2136 rmhome = 1; 2137 break; 2138 #ifdef EXTENSIONS 2139 case 'v': 2140 verbose = 1; 2141 break; 2142 #endif 2143 default: 2144 usermgmt_usage("userdel"); 2145 /* NOTREACHED */ 2146 } 2147 } 2148 #ifdef EXTENSIONS 2149 if (bigD) { 2150 if (defaultfield) { 2151 checkeuid(); 2152 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 2153 } 2154 (void)printf("preserve\t%s\n", (u.u_preserve) ? "true" : 2155 "false"); 2156 return EXIT_SUCCESS; 2157 } 2158 #endif 2159 argc -= optind; 2160 argv += optind; 2161 if (argc != 1) { 2162 usermgmt_usage("userdel"); 2163 } 2164 checkeuid(); 2165 if ((pwp = getpwnam(*argv)) == NULL) { 2166 warnx("No such user `%s'", *argv); 2167 return EXIT_FAILURE; 2168 } 2169 if (rmhome) { 2170 (void)removehomedir(pwp); 2171 } 2172 if (u.u_preserve) { 2173 u.u_flags |= F_SHELL; 2174 memsave(&u.u_shell, NOLOGIN, strlen(NOLOGIN)); 2175 (void)memset(password, '*', DES_Len); 2176 password[DES_Len] = 0; 2177 memsave(&u.u_password, password, strlen(password)); 2178 u.u_flags |= F_PASSWORD; 2179 openlog("userdel", LOG_PID, LOG_USER); 2180 return moduser(*argv, *argv, &u, u.u_allow_samba) ? 2181 EXIT_SUCCESS : EXIT_FAILURE; 2182 } 2183 if (!rm_user_from_groups(*argv)) { 2184 return 0; 2185 } 2186 openlog("userdel", LOG_PID, LOG_USER); 2187 return moduser(*argv, *argv, NULL, u.u_allow_samba) ? 2188 EXIT_SUCCESS : EXIT_FAILURE; 2189 } 2190 2191 #ifdef EXTENSIONS 2192 #define GROUP_ADD_OPT_EXTENSIONS "r:v" 2193 #else 2194 #define GROUP_ADD_OPT_EXTENSIONS 2195 #endif 2196 2197 /* add a group */ 2198 int 2199 groupadd(int argc, char **argv) 2200 { 2201 int dupgid; 2202 int gid; 2203 int c; 2204 int lowgid; 2205 int highgid; 2206 2207 gid = -1; 2208 dupgid = 0; 2209 lowgid = LowGid; 2210 highgid = HighGid; 2211 while ((c = getopt(argc, argv, "g:o" GROUP_ADD_OPT_EXTENSIONS)) != -1) { 2212 switch(c) { 2213 case 'g': 2214 gid = check_numeric(optarg, "gid"); 2215 break; 2216 case 'o': 2217 dupgid = 1; 2218 break; 2219 #ifdef EXTENSIONS 2220 case 'r': 2221 if (sscanf(optarg, "%d..%d", &lowgid, &highgid) != 2) { 2222 errx(EXIT_FAILURE, "Bad range `%s'", optarg); 2223 } 2224 break; 2225 case 'v': 2226 verbose = 1; 2227 break; 2228 #endif 2229 default: 2230 usermgmt_usage("groupadd"); 2231 /* NOTREACHED */ 2232 } 2233 } 2234 argc -= optind; 2235 argv += optind; 2236 if (argc != 1) { 2237 usermgmt_usage("groupadd"); 2238 } 2239 checkeuid(); 2240 if (gid < 0 && !getnextgid(&gid, lowgid, highgid)) { 2241 err(EXIT_FAILURE, "Can't add group: can't get next gid"); 2242 } 2243 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 2244 errx(EXIT_FAILURE, "Can't add group: gid %d is a duplicate", 2245 gid); 2246 } 2247 if (!valid_group(*argv)) { 2248 warnx("Invalid group name `%s'", *argv); 2249 } 2250 openlog("groupadd", LOG_PID, LOG_USER); 2251 if (!creategid(*argv, gid, "")) 2252 exit(EXIT_FAILURE); 2253 2254 return EXIT_SUCCESS; 2255 } 2256 2257 #ifdef EXTENSIONS 2258 #define GROUP_DEL_OPT_EXTENSIONS "v" 2259 #else 2260 #define GROUP_DEL_OPT_EXTENSIONS 2261 #endif 2262 2263 /* remove a group */ 2264 int 2265 groupdel(int argc, char **argv) 2266 { 2267 int c; 2268 2269 while ((c = getopt(argc, argv, "" GROUP_DEL_OPT_EXTENSIONS)) != -1) { 2270 switch(c) { 2271 #ifdef EXTENSIONS 2272 case 'v': 2273 verbose = 1; 2274 break; 2275 #endif 2276 default: 2277 usermgmt_usage("groupdel"); 2278 /* NOTREACHED */ 2279 } 2280 } 2281 argc -= optind; 2282 argv += optind; 2283 if (argc != 1) { 2284 usermgmt_usage("groupdel"); 2285 } 2286 if (getgrnam(*argv) == NULL) { 2287 errx(EXIT_FAILURE, "No such group `%s'", *argv); 2288 } 2289 checkeuid(); 2290 openlog("groupdel", LOG_PID, LOG_USER); 2291 if (!modify_gid(*argv, NULL)) 2292 exit(EXIT_FAILURE); 2293 2294 return EXIT_SUCCESS; 2295 } 2296 2297 #ifdef EXTENSIONS 2298 #define GROUP_MOD_OPT_EXTENSIONS "v" 2299 #else 2300 #define GROUP_MOD_OPT_EXTENSIONS 2301 #endif 2302 2303 /* modify a group */ 2304 int 2305 groupmod(int argc, char **argv) 2306 { 2307 struct group *grp; 2308 char buf[MaxEntryLen]; 2309 char *newname; 2310 char **cpp; 2311 int dupgid; 2312 int gid; 2313 int cc; 2314 int c; 2315 2316 gid = -1; 2317 dupgid = 0; 2318 newname = NULL; 2319 while ((c = getopt(argc, argv, "g:on:" GROUP_MOD_OPT_EXTENSIONS)) != -1) { 2320 switch(c) { 2321 case 'g': 2322 gid = check_numeric(optarg, "gid"); 2323 break; 2324 case 'o': 2325 dupgid = 1; 2326 break; 2327 case 'n': 2328 memsave(&newname, optarg, strlen(optarg)); 2329 break; 2330 #ifdef EXTENSIONS 2331 case 'v': 2332 verbose = 1; 2333 break; 2334 #endif 2335 default: 2336 usermgmt_usage("groupmod"); 2337 /* NOTREACHED */ 2338 } 2339 } 2340 argc -= optind; 2341 argv += optind; 2342 if (argc != 1) { 2343 usermgmt_usage("groupmod"); 2344 } 2345 checkeuid(); 2346 if (gid < 0 && newname == NULL) { 2347 errx(EXIT_FAILURE, "Nothing to change"); 2348 } 2349 if (dupgid && gid < 0) { 2350 errx(EXIT_FAILURE, "Duplicate which gid?"); 2351 } 2352 if ((grp = find_group_info(*argv)) == NULL) { 2353 errx(EXIT_FAILURE, "Can't find group `%s' to modify", *argv); 2354 } 2355 if (!is_local(*argv, _PATH_GROUP)) { 2356 errx(EXIT_FAILURE, "Group `%s' must be a local group", *argv); 2357 } 2358 if (newname != NULL && !valid_group(newname)) { 2359 warnx("Invalid group name `%s'", newname); 2360 } 2361 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:", 2362 (newname) ? newname : grp->gr_name, 2363 grp->gr_passwd, 2364 (gid < 0) ? grp->gr_gid : gid); 2365 for (cpp = grp->gr_mem ; *cpp && cc < sizeof(buf) ; cpp++) { 2366 cc += snprintf(&buf[cc], sizeof(buf) - cc, "%s%s", *cpp, 2367 (cpp[1] == NULL) ? "" : ","); 2368 } 2369 cc += snprintf(&buf[cc], sizeof(buf) - cc, "\n"); 2370 if (newname != NULL) 2371 free(newname); 2372 openlog("groupmod", LOG_PID, LOG_USER); 2373 if (!modify_gid(*argv, buf)) 2374 exit(EXIT_FAILURE); 2375 2376 return EXIT_SUCCESS; 2377 } 2378 2379 #ifdef EXTENSIONS 2380 /* display user information */ 2381 int 2382 userinfo(int argc, char **argv) 2383 { 2384 struct passwd *pwp; 2385 struct group *grp; 2386 char buf[MaxEntryLen]; 2387 char **cpp; 2388 int exists; 2389 int cc; 2390 int i; 2391 2392 exists = 0; 2393 buf[0] = '\0'; 2394 while ((i = getopt(argc, argv, "ev")) != -1) { 2395 switch(i) { 2396 case 'e': 2397 exists = 1; 2398 break; 2399 case 'v': 2400 verbose = 1; 2401 break; 2402 default: 2403 usermgmt_usage("userinfo"); 2404 /* NOTREACHED */ 2405 } 2406 } 2407 argc -= optind; 2408 argv += optind; 2409 if (argc != 1) { 2410 usermgmt_usage("userinfo"); 2411 } 2412 pwp = find_user_info(*argv); 2413 if (exists) { 2414 exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE); 2415 } 2416 if (pwp == NULL) { 2417 errx(EXIT_FAILURE, "Can't find user `%s'", *argv); 2418 } 2419 (void)printf("login\t%s\n", pwp->pw_name); 2420 (void)printf("passwd\t%s\n", pwp->pw_passwd); 2421 (void)printf("uid\t%d\n", pwp->pw_uid); 2422 for (cc = 0 ; (grp = getgrent()) != NULL ; ) { 2423 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2424 if (strcmp(*cpp, *argv) == 0 && 2425 grp->gr_gid != pwp->pw_gid) { 2426 cc += snprintf(&buf[cc], sizeof(buf) - cc, 2427 "%s ", grp->gr_name); 2428 } 2429 } 2430 } 2431 if ((grp = getgrgid(pwp->pw_gid)) == NULL) { 2432 (void)printf("groups\t%d %s\n", pwp->pw_gid, buf); 2433 } else { 2434 (void)printf("groups\t%s %s\n", grp->gr_name, buf); 2435 } 2436 (void)printf("change\t%s", pwp->pw_change > 0 ? 2437 ctime(&pwp->pw_change) : pwp->pw_change == -1 ? 2438 "NEXT LOGIN\n" : "NEVER\n"); 2439 (void)printf("class\t%s\n", pwp->pw_class); 2440 (void)printf("gecos\t%s\n", pwp->pw_gecos); 2441 (void)printf("dir\t%s\n", pwp->pw_dir); 2442 (void)printf("shell\t%s\n", pwp->pw_shell); 2443 (void)printf("expire\t%s", pwp->pw_expire ? 2444 ctime(&pwp->pw_expire) : "NEVER\n"); 2445 return EXIT_SUCCESS; 2446 } 2447 #endif 2448 2449 #ifdef EXTENSIONS 2450 /* display user information */ 2451 int 2452 groupinfo(int argc, char **argv) 2453 { 2454 struct group *grp; 2455 char **cpp; 2456 int exists; 2457 int i; 2458 2459 exists = 0; 2460 while ((i = getopt(argc, argv, "ev")) != -1) { 2461 switch(i) { 2462 case 'e': 2463 exists = 1; 2464 break; 2465 case 'v': 2466 verbose = 1; 2467 break; 2468 default: 2469 usermgmt_usage("groupinfo"); 2470 /* NOTREACHED */ 2471 } 2472 } 2473 argc -= optind; 2474 argv += optind; 2475 if (argc != 1) { 2476 usermgmt_usage("groupinfo"); 2477 } 2478 grp = find_group_info(*argv); 2479 if (exists) { 2480 exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE); 2481 } 2482 if (grp == NULL) { 2483 errx(EXIT_FAILURE, "Can't find group `%s'", *argv); 2484 } 2485 (void)printf("name\t%s\n", grp->gr_name); 2486 (void)printf("passwd\t%s\n", grp->gr_passwd); 2487 (void)printf("gid\t%d\n", grp->gr_gid); 2488 (void)printf("members\t"); 2489 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2490 (void)printf("%s", *cpp); 2491 if (*(cpp + 1)) { 2492 (void) printf(", "); 2493 } 2494 } 2495 (void)fputc('\n', stdout); 2496 return EXIT_SUCCESS; 2497 } 2498 #endif 2499