1 /* $NetBSD: user.c,v 1.103 2006/01/26 17:24:52 jmmv 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 1.103 2006/01/26 17:24:52 jmmv Exp $"); 37 #endif 38 39 #include <sys/types.h> 40 #include <sys/param.h> 41 #include <sys/stat.h> 42 43 #include <ctype.h> 44 #include <dirent.h> 45 #include <err.h> 46 #include <fcntl.h> 47 #include <grp.h> 48 #ifdef EXTENSIONS 49 #include <login_cap.h> 50 #endif 51 #include <paths.h> 52 #include <pwd.h> 53 #include <regex.h> 54 #include <stdarg.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <syslog.h> 59 #include <time.h> 60 #include <unistd.h> 61 #include <util.h> 62 #include <errno.h> 63 64 #include "defs.h" 65 #include "usermgmt.h" 66 67 68 /* this struct describes a uid range */ 69 typedef struct range_t { 70 int r_from; /* low uid */ 71 int r_to; /* high uid */ 72 } range_t; 73 74 /* this struct encapsulates the user information */ 75 typedef struct user_t { 76 int u_flags; /* see below */ 77 int u_uid; /* uid of user */ 78 char *u_password; /* encrypted password */ 79 char *u_comment; /* comment field */ 80 char *u_home; /* home directory */ 81 char *u_primgrp; /* primary group */ 82 int u_groupc; /* # of secondary groups */ 83 const char *u_groupv[NGROUPS_MAX]; /* secondary groups */ 84 char *u_shell; /* user's shell */ 85 char *u_basedir; /* base directory for home */ 86 char *u_expire; /* when password will expire */ 87 char *u_inactive; /* when account will expire */ 88 char *u_skeldir; /* directory for startup files */ 89 char *u_class; /* login class */ 90 unsigned u_rsize; /* size of range array */ 91 unsigned u_rc; /* # of ranges */ 92 range_t *u_rv; /* the ranges */ 93 unsigned u_defrc; /* # of ranges in defaults */ 94 int u_preserve; /* preserve uids on deletion */ 95 int u_allow_samba; /* allow trailing '$' for samba login names */ 96 int u_locked; /* user account lock */ 97 } user_t; 98 99 /* flags for which fields of the user_t replace the passwd entry */ 100 enum { 101 F_COMMENT = 0x0001, 102 F_DUPUID = 0x0002, 103 F_EXPIRE = 0x0004, 104 F_GROUP = 0x0008, 105 F_HOMEDIR = 0x0010, 106 F_MKDIR = 0x0020, 107 F_INACTIVE = 0x0040, 108 F_PASSWORD = 0x0080, 109 F_SECGROUP = 0x0100, 110 F_SHELL = 0x0200, 111 F_UID = 0x0400, 112 F_USERNAME = 0x0800, 113 F_CLASS = 0x1000 114 }; 115 116 #define UNLOCK 0 117 #define LOCK 1 118 #define LOCKED "*LOCKED*" 119 120 #define PATH_LOGINCONF "/etc/login.conf" 121 122 #ifndef DEF_GROUP 123 #define DEF_GROUP "users" 124 #endif 125 126 #ifndef DEF_BASEDIR 127 #define DEF_BASEDIR "/home" 128 #endif 129 130 #ifndef DEF_SKELDIR 131 #define DEF_SKELDIR "/etc/skel" 132 #endif 133 134 #ifndef DEF_SHELL 135 #define DEF_SHELL _PATH_CSHELL 136 #endif 137 138 #ifndef DEF_COMMENT 139 #define DEF_COMMENT "" 140 #endif 141 142 #ifndef DEF_LOWUID 143 #define DEF_LOWUID 1000 144 #endif 145 146 #ifndef DEF_HIGHUID 147 #define DEF_HIGHUID 60000 148 #endif 149 150 #ifndef DEF_INACTIVE 151 #define DEF_INACTIVE 0 152 #endif 153 154 #ifndef DEF_EXPIRE 155 #define DEF_EXPIRE NULL 156 #endif 157 158 #ifndef DEF_CLASS 159 #define DEF_CLASS "" 160 #endif 161 162 #ifndef WAITSECS 163 #define WAITSECS 10 164 #endif 165 166 #ifndef NOBODY_UID 167 #define NOBODY_UID 32767 168 #endif 169 170 /* some useful constants */ 171 enum { 172 MaxShellNameLen = 256, 173 MaxFileNameLen = MAXPATHLEN, 174 MaxUserNameLen = LOGIN_NAME_MAX - 1, 175 MaxCommandLen = 2048, 176 MaxEntryLen = 2048, 177 PasswordLength = 2048, 178 179 DES_Len = 13, 180 181 LowGid = DEF_LOWUID, 182 HighGid = DEF_HIGHUID 183 }; 184 185 /* Full paths of programs used here */ 186 #define CHMOD "/bin/chmod" 187 #define CHOWN "/usr/sbin/chown" 188 #define MKDIR "/bin/mkdir" 189 #define MV "/bin/mv" 190 #define NOLOGIN "/sbin/nologin" 191 #define PAX "/bin/pax" 192 #define RM "/bin/rm" 193 194 #define UNSET_INACTIVE "Null (unset)" 195 #define UNSET_EXPIRY "Null (unset)" 196 197 static int asystem(const char *fmt, ...) 198 __attribute__((__format__(__printf__, 1, 2))); 199 static int is_number(const char *); 200 static struct group *find_group_info(const char *); 201 static int verbose; 202 203 static char * 204 skipspace(char *s) 205 { 206 for (; *s && isspace((unsigned char)*s) ; s++) { 207 } 208 return s; 209 } 210 211 static int 212 check_numeric(const char *val, const char *name) 213 { 214 if (!is_number(val)) { 215 errx(EXIT_FAILURE, "When using [-%c %s], " 216 "the %s must be numeric", *name, name, name); 217 } 218 return atoi(val); 219 } 220 221 /* if *cpp is non-null, free it, then assign `n' chars of `s' to it */ 222 static void 223 memsave(char **cpp, const char *s, size_t n) 224 { 225 if (*cpp != NULL) { 226 FREE(*cpp); 227 } 228 NEWARRAY(char, *cpp, n + 1, exit(1)); 229 (void)memcpy(*cpp, s, n); 230 (*cpp)[n] = '\0'; 231 } 232 233 /* a replacement for system(3) */ 234 static int 235 asystem(const char *fmt, ...) 236 { 237 va_list vp; 238 char buf[MaxCommandLen]; 239 int ret; 240 241 va_start(vp, fmt); 242 (void)vsnprintf(buf, sizeof(buf), fmt, vp); 243 va_end(vp); 244 if (verbose) { 245 (void)printf("Command: %s\n", buf); 246 } 247 if ((ret = system(buf)) != 0) { 248 warn("Error running `%s'", buf); 249 } 250 return ret; 251 } 252 253 /* remove a users home directory, returning 1 for success (ie, no problems encountered) */ 254 static int 255 removehomedir(struct passwd *pwp) 256 { 257 struct stat st; 258 259 /* userid not root? */ 260 if (pwp->pw_uid == 0) { 261 warnx("Not deleting home directory `%s'; userid is 0", pwp->pw_dir); 262 return 0; 263 } 264 265 /* directory exists (and is a directory!) */ 266 if (stat(pwp->pw_dir, &st) < 0) { 267 warn("Cannot access home directory `%s'", pwp->pw_dir); 268 return 0; 269 } 270 if (!S_ISDIR(st.st_mode)) { 271 warnx("Home directory `%s' is not a directory", pwp->pw_dir); 272 return 0; 273 } 274 275 /* userid matches directory owner? */ 276 if (st.st_uid != pwp->pw_uid) { 277 warnx("User `%s' doesn't own directory `%s', not removed", 278 pwp->pw_name, pwp->pw_dir); 279 return 0; 280 } 281 282 (void)seteuid(pwp->pw_uid); 283 /* we add the "|| true" to keep asystem() quiet if there is a non-zero exit status. */ 284 (void)asystem("%s -rf %s > /dev/null 2>&1 || true", RM, pwp->pw_dir); 285 (void)seteuid(0); 286 if (rmdir(pwp->pw_dir) < 0) { 287 warn("Unable to remove all files in `%s'", pwp->pw_dir); 288 return 0; 289 } 290 return 1; 291 } 292 293 /* return 1 if all of `s' is numeric */ 294 static int 295 is_number(const char *s) 296 { 297 for ( ; *s ; s++) { 298 if (!isdigit((unsigned char) *s)) { 299 return 0; 300 } 301 } 302 return 1; 303 } 304 305 /* 306 * check that the effective uid is 0 - called from funcs which will 307 * modify data and config files. 308 */ 309 static void 310 checkeuid(void) 311 { 312 if (geteuid() != 0) { 313 errx(EXIT_FAILURE, "Program must be run as root"); 314 } 315 } 316 317 /* copy any dot files into the user's home directory */ 318 static int 319 copydotfiles(char *skeldir, int uid, int gid, char *dir) 320 { 321 struct dirent *dp; 322 DIR *dirp; 323 int n; 324 325 if ((dirp = opendir(skeldir)) == NULL) { 326 warn("Can't open source . files dir `%s'", skeldir); 327 return 0; 328 } 329 for (n = 0; (dp = readdir(dirp)) != NULL && n == 0 ; ) { 330 if (strcmp(dp->d_name, ".") == 0 || 331 strcmp(dp->d_name, "..") == 0) { 332 continue; 333 } 334 n = 1; 335 } 336 (void)closedir(dirp); 337 if (n == 0) { 338 warnx("No \"dot\" initialisation files found"); 339 } else { 340 (void)asystem("cd %s && %s -rw -pe %s . %s", 341 skeldir, PAX, (verbose) ? "-v" : "", dir); 342 } 343 (void)asystem("%s -R -h %d:%d %s", CHOWN, uid, gid, dir); 344 (void)asystem("%s -R u+w %s", CHMOD, dir); 345 return n; 346 } 347 348 /* create a group entry with gid `gid' */ 349 static int 350 creategid(char *group, int gid, const char *name) 351 { 352 struct stat st; 353 FILE *from; 354 FILE *to; 355 char buf[MaxEntryLen]; 356 char f[MaxFileNameLen]; 357 int fd; 358 int cc; 359 360 if (getgrnam(group) != NULL) { 361 warnx("Can't create group `%s': already exists", group); 362 return 0; 363 } 364 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 365 warn("Can't create group `%s': can't open `%s'", name, 366 _PATH_GROUP); 367 return 0; 368 } 369 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 370 warn("Can't lock `%s'", _PATH_GROUP); 371 return 0; 372 } 373 (void)fstat(fileno(from), &st); 374 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 375 if ((fd = mkstemp(f)) < 0) { 376 warn("Can't create group `%s': mkstemp failed", group); 377 (void)fclose(from); 378 return 0; 379 } 380 if ((to = fdopen(fd, "w")) == NULL) { 381 warn("Can't create group `%s': fdopen `%s' failed", 382 group, f); 383 (void)fclose(from); 384 (void)close(fd); 385 (void)unlink(f); 386 return 0; 387 } 388 while ((cc = fread(buf, sizeof(char), sizeof(buf), from)) > 0) { 389 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 390 warn("Can't create group `%s': short write to `%s'", 391 group, f); 392 (void)fclose(from); 393 (void)close(fd); 394 (void)unlink(f); 395 return 0; 396 } 397 } 398 (void)fprintf(to, "%s:*:%d:%s\n", group, gid, name); 399 (void)fclose(from); 400 (void)fclose(to); 401 if (rename(f, _PATH_GROUP) < 0) { 402 warn("Can't create group `%s': can't rename `%s' to `%s'", 403 group, f, _PATH_GROUP); 404 (void)unlink(f); 405 return 0; 406 } 407 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 408 syslog(LOG_INFO, "New group added: name=%s, gid=%d", group, gid); 409 return 1; 410 } 411 412 /* modify the group entry with name `group' to be newent */ 413 static int 414 modify_gid(char *group, char *newent) 415 { 416 struct stat st; 417 FILE *from; 418 FILE *to; 419 char buf[MaxEntryLen]; 420 char f[MaxFileNameLen]; 421 char *colon; 422 int groupc; 423 int entc; 424 int fd; 425 int cc; 426 427 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 428 warn("Can't modify group `%s': can't open `%s'", 429 group, _PATH_GROUP); 430 return 0; 431 } 432 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 433 warn("Can't modify group `%s': can't lock `%s'", 434 group, _PATH_GROUP); 435 return 0; 436 } 437 (void)fstat(fileno(from), &st); 438 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 439 if ((fd = mkstemp(f)) < 0) { 440 warn("Can't modify group `%s': mkstemp failed", group); 441 (void)fclose(from); 442 return 0; 443 } 444 if ((to = fdopen(fd, "w")) == NULL) { 445 warn("Can't modify group `%s': fdopen `%s' failed", group, f); 446 (void)fclose(from); 447 (void)close(fd); 448 (void)unlink(f); 449 return 0; 450 } 451 groupc = strlen(group); 452 while (fgets(buf, sizeof(buf), from) != NULL) { 453 cc = strlen(buf); 454 if ((colon = strchr(buf, ':')) == NULL) { 455 warnx("Badly formed entry `%s'", buf); 456 continue; 457 } 458 entc = (int)(colon - buf); 459 if (entc == groupc && 460 strncmp(group, buf, (unsigned) entc) == 0) { 461 if (newent == NULL) { 462 struct group *grp_rm; 463 struct passwd *user_pwd; 464 465 /* 466 * Check that the group being removed 467 * isn't any user's Primary group. Just 468 * warn if it is. This could cause problems 469 * if the group GID was reused for a 470 * different purpose. 471 */ 472 473 grp_rm = find_group_info(group); 474 while ((user_pwd = getpwent()) != NULL) { 475 if (user_pwd->pw_gid == grp_rm->gr_gid) { 476 warnx("Warning: group `%s'(%d)" 477 " is the primary group of" 478 " `%s'. Use caution if you" 479 " later add this GID.", 480 grp_rm->gr_name, 481 grp_rm->gr_gid, user_pwd->pw_name); 482 } 483 } 484 endpwent(); 485 continue; 486 } else { 487 cc = strlen(newent); 488 (void)strlcpy(buf, newent, sizeof(buf)); 489 } 490 } 491 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 492 warn("Can't modify group `%s': short write to `%s'", 493 group, f); 494 (void)fclose(from); 495 (void)close(fd); 496 (void)unlink(f); 497 return 0; 498 } 499 } 500 (void)fclose(from); 501 (void)fclose(to); 502 if (rename(f, _PATH_GROUP) < 0) { 503 warn("Can't modify group `%s': can't rename `%s' to `%s'", 504 group, f, _PATH_GROUP); 505 (void)unlink(f); 506 return 0; 507 } 508 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 509 if (newent == NULL) { 510 syslog(LOG_INFO, "group deleted: name=%s", group); 511 } else { 512 syslog(LOG_INFO, "group information modified: name=%s", group); 513 } 514 return 1; 515 } 516 517 /* modify the group entries for all `groups', by adding `user' */ 518 static int 519 append_group(char *user, int ngroups, const char **groups) 520 { 521 struct group *grp; 522 struct stat st; 523 FILE *from; 524 FILE *to; 525 char buf[MaxEntryLen]; 526 char f[MaxFileNameLen]; 527 char *colon; 528 int groupc; 529 int entc; 530 int fd; 531 int nc; 532 int cc; 533 int i; 534 int j; 535 536 for (i = 0 ; i < ngroups ; i++) { 537 if ((grp = getgrnam(groups[i])) == NULL) { 538 warnx("Can't append group `%s' for user `%s'", 539 groups[i], user); 540 } else { 541 for (j = 0 ; grp->gr_mem[j] ; j++) { 542 if (strcmp(user, grp->gr_mem[j]) == 0) { 543 /* already in it */ 544 groups[i] = ""; 545 } 546 } 547 } 548 } 549 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 550 warn("Can't append group(s) for `%s': can't open `%s'", 551 user, _PATH_GROUP); 552 return 0; 553 } 554 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 555 warn("Can't append group(s) for `%s': can't lock `%s'", 556 user, _PATH_GROUP); 557 return 0; 558 } 559 (void)fstat(fileno(from), &st); 560 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 561 if ((fd = mkstemp(f)) < 0) { 562 warn("Can't append group(s) for `%s': mkstemp failed", 563 user); 564 (void)fclose(from); 565 return 0; 566 } 567 if ((to = fdopen(fd, "w")) == NULL) { 568 warn("Can't append group(s) for `%s': fdopen `%s' failed", 569 user, f); 570 (void)fclose(from); 571 (void)close(fd); 572 (void)unlink(f); 573 return 0; 574 } 575 while (fgets(buf, sizeof(buf), from) != NULL) { 576 cc = strlen(buf); 577 if ((colon = strchr(buf, ':')) == NULL) { 578 warnx("Badly formed entry `%s'", buf); 579 continue; 580 } 581 entc = (int)(colon - buf); 582 for (i = 0 ; i < ngroups ; i++) { 583 if ((groupc = strlen(groups[i])) == 0) { 584 continue; 585 } 586 if (entc == groupc && 587 strncmp(groups[i], buf, (unsigned) entc) == 0) { 588 if ((nc = snprintf(&buf[cc - 1], 589 sizeof(buf) - cc + 1, "%s%s\n", 590 (buf[cc - 2] == ':') ? "" : ",", user)) < 0) { 591 warnx("Warning: group `%s' " 592 "entry too long", groups[i]); 593 } 594 cc += nc - 1; 595 } 596 } 597 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 598 warn("Can't append group(s) for `%s':" 599 " short write to `%s'", user, f); 600 (void)fclose(from); 601 (void)close(fd); 602 (void)unlink(f); 603 return 0; 604 } 605 } 606 (void)fclose(from); 607 (void)fclose(to); 608 if (rename(f, _PATH_GROUP) < 0) { 609 warn("Can't append group(s) for `%s': " 610 "can't rename `%s' to `%s'", user, f, _PATH_GROUP); 611 (void)unlink(f); 612 return 0; 613 } 614 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 615 return 1; 616 } 617 618 /* the valid characters for login and group names */ 619 #define VALID_CHAR(c) (isalnum(c) || (c) == '.' || (c) == '_' || (c) == '-') 620 621 /* return 1 if `login' is a valid login name */ 622 static int 623 valid_login(char *login_name, int allow_samba) 624 { 625 unsigned char *cp; 626 627 /* First character of a login name cannot be '-'. */ 628 if (*login_name == '-') { 629 return 0; 630 } 631 if (strlen(login_name) >= LOGIN_NAME_MAX) { 632 return 0; 633 } 634 for (cp = (unsigned char *)login_name ; *cp ; cp++) { 635 if (!VALID_CHAR(*cp)) { 636 #ifdef EXTENSIONS 637 /* check for a trailing '$' in a Samba user name */ 638 if (allow_samba && *cp == '$' && *(cp + 1) == 0x0) { 639 return 1; 640 } 641 #endif 642 return 0; 643 } 644 } 645 return 1; 646 } 647 648 /* return 1 if `group' is a valid group name */ 649 static int 650 valid_group(char *group) 651 { 652 unsigned char *cp; 653 654 for (cp = (unsigned char *)group; *cp; cp++) { 655 if (!VALID_CHAR(*cp)) { 656 return 0; 657 } 658 } 659 return 1; 660 } 661 662 /* find the next gid in the range lo .. hi */ 663 static int 664 getnextgid(int *gidp, int lo, int hi) 665 { 666 for (*gidp = lo ; *gidp < hi ; *gidp += 1) { 667 if (getgrgid((gid_t)*gidp) == NULL) { 668 return 1; 669 } 670 } 671 return 0; 672 } 673 674 #ifdef EXTENSIONS 675 /* save a range of uids */ 676 static int 677 save_range(user_t *up, char *cp) 678 { 679 int from; 680 int to; 681 int i; 682 683 if (up->u_rsize == 0) { 684 up->u_rsize = 32; 685 NEWARRAY(range_t, up->u_rv, up->u_rsize, return(0)); 686 } else if (up->u_rc == up->u_rsize) { 687 up->u_rsize *= 2; 688 RENEW(range_t, up->u_rv, up->u_rsize, return(0)); 689 } 690 if (up->u_rv && sscanf(cp, "%d..%d", &from, &to) == 2) { 691 for (i = up->u_defrc ; i < up->u_rc ; i++) { 692 if (up->u_rv[i].r_from == from && 693 up->u_rv[i].r_to == to) { 694 break; 695 } 696 } 697 if (i == up->u_rc) { 698 up->u_rv[up->u_rc].r_from = from; 699 up->u_rv[up->u_rc].r_to = to; 700 up->u_rc += 1; 701 } 702 } else { 703 warnx("Bad range `%s'", cp); 704 return 0; 705 } 706 return 1; 707 } 708 #endif 709 710 /* set the defaults in the defaults file */ 711 static int 712 setdefaults(user_t *up) 713 { 714 char template[MaxFileNameLen]; 715 FILE *fp; 716 int ret; 717 int fd; 718 #ifdef EXTENSIONS 719 int i; 720 #endif 721 722 (void)snprintf(template, sizeof(template), "%s.XXXXXX", 723 _PATH_USERMGMT_CONF); 724 if ((fd = mkstemp(template)) < 0) { 725 warn("Can't set defaults: can't mkstemp `%s' for writing", 726 _PATH_USERMGMT_CONF); 727 return 0; 728 } 729 if ((fp = fdopen(fd, "w")) == NULL) { 730 warn("Can't set defaults: can't fdopen `%s' for writing", 731 _PATH_USERMGMT_CONF); 732 return 0; 733 } 734 ret = 1; 735 if (fprintf(fp, "group\t\t%s\n", up->u_primgrp) <= 0 || 736 fprintf(fp, "base_dir\t%s\n", up->u_basedir) <= 0 || 737 fprintf(fp, "skel_dir\t%s\n", up->u_skeldir) <= 0 || 738 fprintf(fp, "shell\t\t%s\n", up->u_shell) <= 0 || 739 #ifdef EXTENSIONS 740 fprintf(fp, "class\t\t%s\n", up->u_class) <= 0 || 741 #endif 742 fprintf(fp, "inactive\t%s\n", (up->u_inactive == NULL) ? 743 UNSET_INACTIVE : up->u_inactive) <= 0 || 744 fprintf(fp, "expire\t\t%s\n", (up->u_expire == NULL) ? 745 UNSET_EXPIRY : up->u_expire) <= 0 || 746 fprintf(fp, "preserve\t%s\n", (up->u_preserve == 0) ? 747 "false" : "true") <= 0) { 748 warn("Can't write to `%s'", _PATH_USERMGMT_CONF); 749 ret = 0; 750 } 751 #ifdef EXTENSIONS 752 for (i = (up->u_defrc != up->u_rc) ? up->u_defrc : 0; 753 i < up->u_rc ; i++) { 754 if (fprintf(fp, "range\t\t%d..%d\n", up->u_rv[i].r_from, 755 up->u_rv[i].r_to) <= 0) { 756 warn("Can't set defaults: can't write to `%s'", 757 _PATH_USERMGMT_CONF); 758 ret = 0; 759 } 760 } 761 #endif 762 (void)fclose(fp); 763 if (ret) { 764 ret = ((rename(template, _PATH_USERMGMT_CONF) == 0) && 765 (chmod(_PATH_USERMGMT_CONF, 0644) == 0)); 766 } 767 return ret; 768 } 769 770 /* read the defaults file */ 771 static void 772 read_defaults(user_t *up) 773 { 774 struct stat st; 775 size_t lineno; 776 size_t len; 777 FILE *fp; 778 char *cp; 779 char *s; 780 781 memsave(&up->u_primgrp, DEF_GROUP, strlen(DEF_GROUP)); 782 memsave(&up->u_basedir, DEF_BASEDIR, strlen(DEF_BASEDIR)); 783 memsave(&up->u_skeldir, DEF_SKELDIR, strlen(DEF_SKELDIR)); 784 memsave(&up->u_shell, DEF_SHELL, strlen(DEF_SHELL)); 785 memsave(&up->u_comment, DEF_COMMENT, strlen(DEF_COMMENT)); 786 #ifdef EXTENSIONS 787 memsave(&up->u_class, DEF_CLASS, strlen(DEF_CLASS)); 788 #endif 789 up->u_rsize = 16; 790 up->u_defrc = 0; 791 NEWARRAY(range_t, up->u_rv, up->u_rsize, exit(1)); 792 up->u_inactive = DEF_INACTIVE; 793 up->u_expire = DEF_EXPIRE; 794 if ((fp = fopen(_PATH_USERMGMT_CONF, "r")) == NULL) { 795 if (stat(_PATH_USERMGMT_CONF, &st) < 0 && !setdefaults(up)) { 796 warn("Can't create `%s' defaults file", 797 _PATH_USERMGMT_CONF); 798 } 799 fp = fopen(_PATH_USERMGMT_CONF, "r"); 800 } 801 if (fp != NULL) { 802 while ((s = fparseln(fp, &len, &lineno, NULL, 0)) != NULL) { 803 if (strncmp(s, "group", 5) == 0) { 804 cp = skipspace(s + 5); 805 memsave(&up->u_primgrp, (char *)cp, strlen(cp)); 806 } else if (strncmp(s, "base_dir", 8) == 0) { 807 cp = skipspace(s + 8); 808 memsave(&up->u_basedir, (char *)cp, strlen(cp)); 809 } else if (strncmp(s, "skel_dir", 8) == 0) { 810 cp = skipspace(s + 8); 811 memsave(&up->u_skeldir, (char *)cp, strlen(cp)); 812 } else if (strncmp(s, "shell", 5) == 0) { 813 cp = skipspace(s + 5); 814 memsave(&up->u_shell, cp, strlen(cp)); 815 #ifdef EXTENSIONS 816 } else if (strncmp((char *)s, "class", 5) == 0) { 817 cp = skipspace(s + 5); 818 memsave(&up->u_class, cp, strlen(cp)); 819 #endif 820 } else if (strncmp(s, "inactive", 8) == 0) { 821 cp = skipspace(s + 8); 822 if (strcmp(cp, UNSET_INACTIVE) == 0) { 823 if (up->u_inactive) { 824 FREE(up->u_inactive); 825 } 826 up->u_inactive = NULL; 827 } else { 828 memsave(&up->u_inactive, cp, strlen(cp)); 829 } 830 #ifdef EXTENSIONS 831 } else if (strncmp(s, "range", 5) == 0) { 832 cp = skipspace(s + 5); 833 (void)save_range(up, cp); 834 #endif 835 #ifdef EXTENSIONS 836 } else if (strncmp(s, "preserve", 8) == 0) { 837 cp = skipspace(s + 8); 838 up->u_preserve = 839 (strncmp(cp, "true", 4) == 0) ? 1 : 840 (strncmp(cp, "yes", 3) == 0) ? 1 : atoi(cp); 841 #endif 842 } else if (strncmp(s, "expire", 6) == 0) { 843 cp = skipspace(s + 6); 844 if (strcmp(cp, UNSET_EXPIRY) == 0) { 845 if (up->u_expire) { 846 FREE(up->u_expire); 847 } 848 up->u_expire = NULL; 849 } else { 850 memsave(&up->u_expire, cp, strlen(cp)); 851 } 852 } 853 (void)free(s); 854 } 855 (void)fclose(fp); 856 } 857 if (up->u_rc == 0) { 858 up->u_rv[up->u_rc].r_from = DEF_LOWUID; 859 up->u_rv[up->u_rc].r_to = DEF_HIGHUID; 860 up->u_rc += 1; 861 } 862 up->u_defrc = up->u_rc; 863 } 864 865 /* return the next valid unused uid */ 866 static int 867 getnextuid(int sync_uid_gid, int *uid, int low_uid, int high_uid) 868 { 869 for (*uid = low_uid ; *uid <= high_uid ; (*uid)++) { 870 if (getpwuid((uid_t)(*uid)) == NULL && *uid != NOBODY_UID) { 871 if (sync_uid_gid) { 872 if (getgrgid((gid_t)(*uid)) == NULL) { 873 return 1; 874 } 875 } else { 876 return 1; 877 } 878 } 879 } 880 return 0; 881 } 882 883 /* structure which defines a password type */ 884 typedef struct passwd_type_t { 885 const char *type; /* optional type descriptor */ 886 size_t desc_length; /* length of type descriptor */ 887 size_t length; /* length of password */ 888 const char *regex; /* regexp to output the password */ 889 size_t re_sub; /* subscript of regexp to use */ 890 } passwd_type_t; 891 892 static passwd_type_t passwd_types[] = { 893 { "$sha1", 5, 28, "\\$[^$]+\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* SHA1 */ 894 { "$2a", 3, 54, "\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* Blowfish */ 895 { "$1", 2, 34, NULL, 0 }, /* MD5 */ 896 { "", 0, DES_Len,NULL, 0 }, /* standard DES */ 897 { NULL, (size_t)~0, (size_t)~0, NULL, 0 } 898 /* none - terminate search */ 899 }; 900 901 /* return non-zero if it's a valid password - check length for cipher type */ 902 static int 903 valid_password_length(char *newpasswd) 904 { 905 passwd_type_t *pwtp; 906 regmatch_t matchv[10]; 907 regex_t r; 908 909 for (pwtp = passwd_types; pwtp->desc_length != (size_t)~0; pwtp++) { 910 if (strncmp(newpasswd, pwtp->type, pwtp->desc_length) == 0) { 911 if (pwtp->regex == NULL) { 912 return strlen(newpasswd) == pwtp->length; 913 } 914 (void)regcomp(&r, pwtp->regex, REG_EXTENDED); 915 if (regexec(&r, newpasswd, 10, matchv, 0) == 0) { 916 regfree(&r); 917 return (int)(matchv[pwtp->re_sub].rm_eo - 918 matchv[pwtp->re_sub].rm_so + 1) == 919 pwtp->length; 920 } 921 regfree(&r); 922 } 923 } 924 return 0; 925 } 926 927 #ifdef EXTENSIONS 928 /* return 1 if `class' is a valid login class */ 929 static int 930 valid_class(char *class) 931 { 932 login_cap_t *lc; 933 934 if (class == NULL || *class == '\0') { 935 return 1; 936 } 937 /* 938 * Check if /etc/login.conf exists. login_getclass() will 939 * return 1 due to it not existing, so not informing the 940 * user the actual login class does not exist. 941 */ 942 943 if (access(PATH_LOGINCONF, R_OK) == -1) { 944 warn("Access failed for `%s'; will not validate class `%s'", 945 PATH_LOGINCONF, class); 946 return 1; 947 } 948 949 if ((lc = login_getclass(class)) != NULL) { 950 login_close(lc); 951 return 1; 952 } 953 return 0; 954 } 955 956 /* return 1 if the `shellname' is a valid user shell */ 957 static int 958 valid_shell(const char *shellname) 959 { 960 char *shellp; 961 962 if (access(_PATH_SHELLS, R_OK) == -1) { 963 /* Don't exit */ 964 warn("Access failed for `%s'; will not validate shell `%s'", 965 _PATH_SHELLS, shellname); 966 return 1; 967 } 968 969 /* if nologin is used as a shell, consider it a valid shell */ 970 if (strcmp(shellname, NOLOGIN) == 0) { 971 return 1; 972 } 973 974 while ((shellp = getusershell()) != NULL) { 975 if (strcmp(shellp, shellname) == 0) { 976 return 1; 977 } 978 } 979 980 return 0; 981 } 982 #endif 983 984 /* look for a valid time, return 0 if it was specified but bad */ 985 static int 986 scantime(time_t *tp, char *s) 987 { 988 struct tm tm; 989 char *ep; 990 long val; 991 992 *tp = 0; 993 if (s != NULL) { 994 (void)memset(&tm, 0, sizeof(tm)); 995 if (strptime(s, "%c", &tm) != NULL) { 996 *tp = mktime(&tm); 997 return (*tp == -1) ? 0 : 1; 998 } else if (strptime(s, "%B %d %Y", &tm) != NULL) { 999 *tp = mktime(&tm); 1000 return (*tp == -1) ? 0 : 1; 1001 } else { 1002 errno = 0; 1003 *tp = val = strtol(s, &ep, 10); 1004 if (*ep != '\0' || *tp < -1 || errno == ERANGE) { 1005 *tp = 0; 1006 return 0; 1007 } 1008 if (*tp != val) { 1009 return 0; 1010 } 1011 } 1012 } 1013 return 1; 1014 } 1015 1016 /* add a user */ 1017 static int 1018 adduser(char *login_name, user_t *up) 1019 { 1020 struct group *grp; 1021 struct stat st; 1022 time_t expire; 1023 time_t inactive; 1024 char password[PasswordLength + 1]; 1025 char home[MaxFileNameLen]; 1026 char buf[MaxFileNameLen]; 1027 int sync_uid_gid; 1028 int masterfd; 1029 int ptmpfd; 1030 int gid; 1031 int cc; 1032 int i; 1033 1034 if (!valid_login(login_name, up->u_allow_samba)) { 1035 errx(EXIT_FAILURE, "Can't add user `%s': invalid login name", login_name); 1036 } 1037 #ifdef EXTENSIONS 1038 if (!valid_class(up->u_class)) { 1039 errx(EXIT_FAILURE, "Can't add user `%s': no such login class `%s'", 1040 login_name, up->u_class); 1041 } 1042 #endif 1043 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1044 err(EXIT_FAILURE, "Can't add user `%s': can't open `%s'", 1045 login_name, _PATH_MASTERPASSWD); 1046 } 1047 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1048 err(EXIT_FAILURE, "Can't add user `%s': can't lock `%s'", 1049 login_name, _PATH_MASTERPASSWD); 1050 } 1051 pw_init(); 1052 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1053 int serrno = errno; 1054 (void)close(masterfd); 1055 errno = serrno; 1056 err(EXIT_FAILURE, "Can't add user `%s': can't obtain pw_lock", 1057 login_name); 1058 } 1059 while ((cc = read(masterfd, buf, sizeof(buf))) > 0) { 1060 if (write(ptmpfd, buf, (size_t)(cc)) != cc) { 1061 int serrno = errno; 1062 (void)close(masterfd); 1063 (void)close(ptmpfd); 1064 (void)pw_abort(); 1065 errno = serrno; 1066 err(EXIT_FAILURE, "Can't add user `%s': " 1067 "short write to /etc/ptmp", login_name); 1068 } 1069 } 1070 /* if no uid was specified, get next one in [low_uid..high_uid] range */ 1071 sync_uid_gid = (strcmp(up->u_primgrp, "=uid") == 0); 1072 if (up->u_uid == -1) { 1073 int got_id = 0; 1074 1075 /* 1076 * Look for a free UID in the command line ranges (if any). 1077 * These start after the ranges specified in the config file. 1078 */ 1079 for (i = up->u_defrc; !got_id && i < up->u_rc ; i++) { 1080 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1081 up->u_rv[i].r_from, up->u_rv[i].r_to); 1082 } 1083 /* 1084 * If there were no free UIDs in the command line ranges, 1085 * try the ranges from the config file (there will always 1086 * be at least one default). 1087 */ 1088 for (i = 0; !got_id && i < up->u_defrc; i++) { 1089 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1090 up->u_rv[i].r_from, up->u_rv[i].r_to); 1091 } 1092 if (!got_id) { 1093 (void)close(ptmpfd); 1094 (void)pw_abort(); 1095 errx(EXIT_FAILURE, "Can't add user `%s': " 1096 "can't get next uid for %d", login_name, 1097 up->u_uid); 1098 } 1099 } 1100 /* check uid isn't already allocated */ 1101 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1102 (void)close(ptmpfd); 1103 (void)pw_abort(); 1104 errx(EXIT_FAILURE, "Can't add user `%s': " 1105 "uid %d is already in use", login_name, up->u_uid); 1106 } 1107 /* if -g=uid was specified, check gid is unused */ 1108 if (sync_uid_gid) { 1109 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1110 (void)close(ptmpfd); 1111 (void)pw_abort(); 1112 errx(EXIT_FAILURE, "Can't add user `%s': " 1113 "gid %d is already in use", login_name, 1114 up->u_uid); 1115 } 1116 gid = up->u_uid; 1117 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1118 gid = grp->gr_gid; 1119 } else if (is_number(up->u_primgrp) && 1120 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1121 gid = grp->gr_gid; 1122 } else { 1123 (void)close(ptmpfd); 1124 (void)pw_abort(); 1125 errx(EXIT_FAILURE, "Can't add user `%s': group %s not found", 1126 login_name, up->u_primgrp); 1127 } 1128 /* check name isn't already in use */ 1129 if (!(up->u_flags & F_DUPUID) && getpwnam(login_name) != NULL) { 1130 (void)close(ptmpfd); 1131 (void)pw_abort(); 1132 errx(EXIT_FAILURE, "Can't add user `%s': " 1133 "`%s' is already a user", login_name, login_name); 1134 } 1135 if (up->u_flags & F_HOMEDIR) { 1136 (void)strlcpy(home, up->u_home, sizeof(home)); 1137 } else { 1138 /* if home directory hasn't been given, make it up */ 1139 (void)snprintf(home, sizeof(home), "%s/%s", up->u_basedir, 1140 login_name); 1141 } 1142 if (up->u_flags & F_SHELL) { 1143 #ifdef EXTENSIONS 1144 if (!valid_shell(up->u_shell)) { 1145 (void)close(ptmpfd); 1146 (void)pw_abort(); 1147 errx(EXIT_FAILURE, "Can't add user `%s': " 1148 "shell `%s' is not valid", login_name, up->u_shell); 1149 } 1150 #endif 1151 } 1152 1153 if (!scantime(&inactive, up->u_inactive)) { 1154 warnx("Warning: inactive time `%s' invalid, password expiry off", 1155 up->u_inactive); 1156 } 1157 if (!scantime(&expire, up->u_expire) || expire == -1) { 1158 warnx("Warning: expire time `%s' invalid, account expiry off", 1159 up->u_expire); 1160 expire = 0; /* Just in case. */ 1161 } 1162 if (lstat(home, &st) < 0 && !(up->u_flags & F_MKDIR)) { 1163 warnx("Warning: home directory `%s' doesn't exist, " 1164 "and -m was not specified", home); 1165 } 1166 password[sizeof(password) - 1] = '\0'; 1167 if (up->u_password != NULL && valid_password_length(up->u_password)) { 1168 (void)strlcpy(password, up->u_password, sizeof(password)); 1169 } else { 1170 (void)memset(password, '*', DES_Len); 1171 password[DES_Len] = 0; 1172 if (up->u_password != NULL) { 1173 warnx("Password `%s' is invalid: setting it to `%s'", 1174 up->u_password, password); 1175 } 1176 } 1177 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1178 login_name, 1179 password, 1180 up->u_uid, 1181 gid, 1182 #ifdef EXTENSIONS 1183 up->u_class, 1184 #else 1185 "", 1186 #endif 1187 (long) inactive, 1188 (long) expire, 1189 up->u_comment, 1190 home, 1191 up->u_shell); 1192 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1193 int serrno = errno; 1194 (void)close(ptmpfd); 1195 (void)pw_abort(); 1196 errno = serrno; 1197 err(EXIT_FAILURE, "Can't add user `%s': write failed", 1198 login_name); 1199 } 1200 if (up->u_flags & F_MKDIR) { 1201 if (lstat(home, &st) == 0) { 1202 (void)close(ptmpfd); 1203 (void)pw_abort(); 1204 errx(EXIT_FAILURE, 1205 "Can't add user `%s': home directory `%s' " 1206 "already exists", login_name, home); 1207 } else { 1208 if (asystem("%s -p %s", MKDIR, home) != 0) { 1209 (void)close(ptmpfd); 1210 (void)pw_abort(); 1211 errx(EXIT_FAILURE, "Can't add user `%s': " 1212 "can't mkdir `%s'", login_name, home); 1213 } 1214 (void)copydotfiles(up->u_skeldir, up->u_uid, gid, home); 1215 } 1216 } 1217 if (strcmp(up->u_primgrp, "=uid") == 0 && 1218 getgrnam(login_name) == NULL && 1219 !creategid(login_name, gid, login_name)) { 1220 (void)close(ptmpfd); 1221 (void)pw_abort(); 1222 errx(EXIT_FAILURE, "Can't add user `%s': can't create gid %d ", 1223 login_name, gid); 1224 } 1225 if (up->u_groupc > 0 && 1226 !append_group(login_name, up->u_groupc, up->u_groupv)) { 1227 (void)close(ptmpfd); 1228 (void)pw_abort(); 1229 errx(EXIT_FAILURE, "Can't add user `%s': can't append " 1230 "to new groups", login_name); 1231 } 1232 (void)close(ptmpfd); 1233 #if PW_MKDB_ARGC == 2 1234 if (pw_mkdb(login_name, 0) < 0) 1235 #else 1236 if (pw_mkdb() < 0) 1237 #endif 1238 { 1239 (void)pw_abort(); 1240 errx(EXIT_FAILURE, "Can't add user `%s': pw_mkdb failed", 1241 login_name); 1242 } 1243 syslog(LOG_INFO, "New user added: name=%s, uid=%d, gid=%d, home=%s, " 1244 "shell=%s", login_name, up->u_uid, gid, home, up->u_shell); 1245 return 1; 1246 } 1247 1248 /* remove a user from the groups file */ 1249 static int 1250 rm_user_from_groups(char *login_name) 1251 { 1252 struct stat st; 1253 regmatch_t matchv[10]; 1254 regex_t r; 1255 FILE *from; 1256 FILE *to; 1257 char line[MaxEntryLen]; 1258 char buf[MaxEntryLen]; 1259 char f[MaxFileNameLen]; 1260 int fd; 1261 int cc; 1262 int sc; 1263 1264 (void)snprintf(line, sizeof(line), "(:|,)(%s)(,|$)", login_name); 1265 if ((sc = regcomp(&r, line, REG_EXTENDED|REG_NEWLINE)) != 0) { 1266 (void)regerror(sc, &r, buf, sizeof(buf)); 1267 warnx("Can't compile regular expression `%s' (%s)", line, 1268 buf); 1269 return 0; 1270 } 1271 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 1272 warn("Can't remove user `%s' from `%s': can't open `%s'", 1273 login_name, _PATH_GROUP, _PATH_GROUP); 1274 return 0; 1275 } 1276 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 1277 warn("Can't remove user `%s' from `%s': can't lock `%s'", 1278 login_name, _PATH_GROUP, _PATH_GROUP); 1279 return 0; 1280 } 1281 (void)fstat(fileno(from), &st); 1282 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 1283 if ((fd = mkstemp(f)) < 0) { 1284 warn("Can't remove user `%s' from `%s': mkstemp failed", 1285 login_name, _PATH_GROUP); 1286 (void)fclose(from); 1287 return 0; 1288 } 1289 if ((to = fdopen(fd, "w")) == NULL) { 1290 warn("Can't remove user `%s' from `%s': fdopen `%s' failed", 1291 login_name, _PATH_GROUP, f); 1292 (void)fclose(from); 1293 (void)close(fd); 1294 (void)unlink(f); 1295 return 0; 1296 } 1297 while (fgets(buf, sizeof(buf), from) != NULL) { 1298 cc = strlen(buf); 1299 if (regexec(&r, buf, 10, matchv, 0) == 0) { 1300 if (buf[(int)matchv[1].rm_so] == ',') { 1301 matchv[2].rm_so = matchv[1].rm_so; 1302 } else if (matchv[2].rm_eo != matchv[3].rm_eo) { 1303 matchv[2].rm_eo = matchv[3].rm_eo; 1304 } 1305 cc -= (int) matchv[2].rm_eo; 1306 sc = (int) matchv[2].rm_so; 1307 if (fwrite(buf, sizeof(char), (size_t)sc, to) != sc || 1308 fwrite(&buf[(int)matchv[2].rm_eo], sizeof(char), 1309 (size_t)cc, to) != cc) { 1310 warn("Can't remove user `%s' from `%s': " 1311 "short write to `%s'", login_name, 1312 _PATH_GROUP, f); 1313 (void)fclose(from); 1314 (void)close(fd); 1315 (void)unlink(f); 1316 return 0; 1317 } 1318 } else if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 1319 warn("Can't remove user `%s' from `%s': " 1320 "short write to `%s'", login_name, _PATH_GROUP, f); 1321 (void)fclose(from); 1322 (void)close(fd); 1323 (void)unlink(f); 1324 return 0; 1325 } 1326 } 1327 (void)fclose(from); 1328 (void)fclose(to); 1329 if (rename(f, _PATH_GROUP) < 0) { 1330 warn("Can't remove user `%s' from `%s': " 1331 "can't rename `%s' to `%s'", 1332 login_name, _PATH_GROUP, f, _PATH_GROUP); 1333 (void)unlink(f); 1334 return 0; 1335 } 1336 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 1337 return 1; 1338 } 1339 1340 /* check that the user or group is local, not from YP/NIS */ 1341 static int 1342 is_local(char *name, const char *file) 1343 { 1344 FILE *fp; 1345 char buf[MaxEntryLen]; 1346 size_t len; 1347 int ret; 1348 1349 if ((fp = fopen(file, "r")) == NULL) { 1350 err(EXIT_FAILURE, "Can't open `%s'", file); 1351 } 1352 len = strlen(name); 1353 for (ret = 0 ; fgets(buf, sizeof(buf), fp) != NULL ; ) { 1354 if (strncmp(buf, name, len) == 0 && buf[len] == ':') { 1355 ret = 1; 1356 break; 1357 } 1358 } 1359 (void)fclose(fp); 1360 return ret; 1361 } 1362 1363 /* modify a user */ 1364 static int 1365 moduser(char *login_name, char *newlogin, user_t *up, int allow_samba) 1366 { 1367 struct passwd *pwp; 1368 struct group *grp; 1369 const char *homedir; 1370 char *locked_pwd; 1371 size_t colonc; 1372 size_t loginc; 1373 size_t len; 1374 size_t cc; 1375 FILE *master; 1376 char newdir[MaxFileNameLen]; 1377 char buf[MaxEntryLen]; 1378 char *colon; 1379 int masterfd; 1380 int ptmpfd; 1381 int error; 1382 1383 if (!valid_login(newlogin, allow_samba)) { 1384 errx(EXIT_FAILURE, "Can't modify user `%s': invalid login name", 1385 login_name); 1386 } 1387 if ((pwp = getpwnam(login_name)) == NULL) { 1388 errx(EXIT_FAILURE, "Can't modify user `%s': no such user", 1389 login_name); 1390 } 1391 if (!is_local(login_name, _PATH_MASTERPASSWD)) { 1392 errx(EXIT_FAILURE, "Can't modify user `%s': must be a local user", 1393 login_name); 1394 } 1395 /* keep dir name in case we need it for '-m' */ 1396 homedir = pwp->pw_dir; 1397 1398 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1399 err(EXIT_FAILURE, "Can't modify user `%s': can't open `%s'", 1400 login_name, _PATH_MASTERPASSWD); 1401 } 1402 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1403 err(EXIT_FAILURE, "Can't modify user `%s': can't lock `%s'", 1404 login_name, _PATH_MASTERPASSWD); 1405 } 1406 pw_init(); 1407 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1408 int serrno = errno; 1409 (void)close(masterfd); 1410 errno = serrno; 1411 err(EXIT_FAILURE, "Can't modify user `%s': " 1412 "can't obtain pw_lock", login_name); 1413 } 1414 if ((master = fdopen(masterfd, "r")) == NULL) { 1415 int serrno = errno; 1416 (void)close(masterfd); 1417 (void)close(ptmpfd); 1418 (void)pw_abort(); 1419 errno = serrno; 1420 err(EXIT_FAILURE, "Can't modify user `%s': " 1421 "fdopen fd for %s", login_name, _PATH_MASTERPASSWD); 1422 } 1423 if (up != NULL) { 1424 if (up->u_flags & F_USERNAME) { 1425 /* 1426 * If changing name, 1427 * check new name isn't already in use 1428 */ 1429 if (strcmp(login_name, newlogin) != 0 && 1430 getpwnam(newlogin) != NULL) { 1431 (void)close(ptmpfd); 1432 (void)pw_abort(); 1433 errx(EXIT_FAILURE, "Can't modify user `%s': " 1434 "`%s' is already a user", login_name, 1435 newlogin); 1436 } 1437 pwp->pw_name = newlogin; 1438 1439 /* 1440 * Provide a new directory name in case the 1441 * home directory is to be moved. 1442 */ 1443 if (up->u_flags & F_MKDIR) { 1444 (void)snprintf(newdir, sizeof(newdir), "%s/%s", 1445 up->u_basedir, newlogin); 1446 pwp->pw_dir = newdir; 1447 } 1448 } 1449 if (up->u_flags & F_PASSWORD) { 1450 if (up->u_password != NULL) { 1451 if (!valid_password_length(up->u_password)) { 1452 (void)close(ptmpfd); 1453 (void)pw_abort(); 1454 errx(EXIT_FAILURE, 1455 "Can't modify user `%s': " 1456 "invalid password: `%s'", 1457 login_name, up->u_password); 1458 } 1459 if ((locked_pwd = 1460 strstr(pwp->pw_passwd, LOCKED)) != NULL) { 1461 /* 1462 * account is locked - keep it locked 1463 * and just change the password. 1464 */ 1465 if (asprintf(&locked_pwd, "%s%s", 1466 LOCKED, up->u_password) == -1) { 1467 (void)close(ptmpfd); 1468 (void)pw_abort(); 1469 err(EXIT_FAILURE, 1470 "Can't modify user `%s': " 1471 "asprintf failed", 1472 login_name); 1473 } 1474 pwp->pw_passwd = locked_pwd; 1475 } else { 1476 pwp->pw_passwd = up->u_password; 1477 } 1478 } 1479 } 1480 1481 /* check whether we should lock the account. */ 1482 if (up->u_locked == LOCK) { 1483 /* check to see account if already locked. */ 1484 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1485 != NULL) { 1486 warnx("Account is already locked"); 1487 } else { 1488 if (asprintf(&locked_pwd, "%s%s", LOCKED, 1489 pwp->pw_passwd) == -1) { 1490 (void)close(ptmpfd); 1491 (void)pw_abort(); 1492 err(EXIT_FAILURE, 1493 "Can't modify user `%s': " 1494 "asprintf failed", login_name); 1495 } 1496 pwp->pw_passwd = locked_pwd; 1497 } 1498 } else if (up->u_locked == UNLOCK) { 1499 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1500 == NULL) { 1501 warnx("Can't modify user `%s': " 1502 "account is not locked", login_name); 1503 } else { 1504 pwp->pw_passwd = locked_pwd + strlen(LOCKED); 1505 } 1506 } 1507 1508 if (up->u_flags & F_UID) { 1509 /* check uid isn't already allocated */ 1510 if (!(up->u_flags & F_DUPUID) && 1511 getpwuid((uid_t)(up->u_uid)) != NULL) { 1512 (void)close(ptmpfd); 1513 (void)pw_abort(); 1514 errx(EXIT_FAILURE, "Can't modify user `%s': " 1515 "uid `%d' is already in use", login_name, 1516 up->u_uid); 1517 } 1518 pwp->pw_uid = up->u_uid; 1519 } 1520 if (up->u_flags & F_GROUP) { 1521 /* if -g=uid was specified, check gid is unused */ 1522 if (strcmp(up->u_primgrp, "=uid") == 0) { 1523 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1524 (void)close(ptmpfd); 1525 (void)pw_abort(); 1526 errx(EXIT_FAILURE, 1527 "Can't modify user `%s': " 1528 "gid %d is already in use", 1529 login_name, up->u_uid); 1530 } 1531 pwp->pw_gid = up->u_uid; 1532 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1533 pwp->pw_gid = grp->gr_gid; 1534 } else if (is_number(up->u_primgrp) && 1535 (grp = getgrgid( 1536 (gid_t)atoi(up->u_primgrp))) != NULL) { 1537 pwp->pw_gid = grp->gr_gid; 1538 } else { 1539 (void)close(ptmpfd); 1540 (void)pw_abort(); 1541 errx(EXIT_FAILURE, "Can't modify user `%s': " 1542 "group %s not found", login_name, 1543 up->u_primgrp); 1544 } 1545 } 1546 if (up->u_flags & F_INACTIVE) { 1547 if (!scantime(&pwp->pw_change, up->u_inactive)) { 1548 warnx("Warning: inactive time `%s' invalid, " 1549 "password expiry off", 1550 up->u_inactive); 1551 } 1552 } 1553 if (up->u_flags & F_EXPIRE) { 1554 if (!scantime(&pwp->pw_expire, up->u_expire) || 1555 pwp->pw_expire == -1) { 1556 warnx("Warning: expire time `%s' invalid, " 1557 "account expiry off", 1558 up->u_expire); 1559 pwp->pw_expire = 0; 1560 } 1561 } 1562 if (up->u_flags & F_COMMENT) { 1563 pwp->pw_gecos = up->u_comment; 1564 } 1565 if (up->u_flags & F_HOMEDIR) { 1566 pwp->pw_dir = up->u_home; 1567 } 1568 if (up->u_flags & F_SHELL) { 1569 #ifdef EXTENSIONS 1570 if (!valid_shell(up->u_shell)) { 1571 (void)close(ptmpfd); 1572 (void)pw_abort(); 1573 errx(EXIT_FAILURE, "Can't modify user `%s': " 1574 "shell `%s' is not valid", login_name, up->u_shell); 1575 } 1576 pwp->pw_shell = up->u_shell; 1577 #else 1578 pwp->pw_shell = up->u_shell; 1579 #endif 1580 } 1581 #ifdef EXTENSIONS 1582 if (up->u_flags & F_CLASS) { 1583 if (!valid_class(up->u_class)) { 1584 (void)close(ptmpfd); 1585 (void)pw_abort(); 1586 errx(EXIT_FAILURE, "Can't modify user `%s': " 1587 "no such login class `%s'", login_name, 1588 up->u_class); 1589 } 1590 pwp->pw_class = up->u_class; 1591 } 1592 #endif 1593 } 1594 loginc = strlen(login_name); 1595 while (fgets(buf, sizeof(buf), master) != NULL) { 1596 if ((colon = strchr(buf, ':')) == NULL) { 1597 warnx("Malformed entry `%s'. Skipping", buf); 1598 continue; 1599 } 1600 colonc = (size_t)(colon - buf); 1601 if (strncmp(login_name, buf, loginc) == 0 && loginc == colonc) { 1602 if (up != NULL) { 1603 len = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:" 1604 #ifdef EXTENSIONS 1605 "%s" 1606 #endif 1607 ":%ld:%ld:%s:%s:%s\n", 1608 newlogin, 1609 pwp->pw_passwd, 1610 pwp->pw_uid, 1611 pwp->pw_gid, 1612 #ifdef EXTENSIONS 1613 pwp->pw_class, 1614 #endif 1615 (long)pwp->pw_change, 1616 (long)pwp->pw_expire, 1617 pwp->pw_gecos, 1618 pwp->pw_dir, 1619 pwp->pw_shell); 1620 if (write(ptmpfd, buf, len) != len) { 1621 int serrno = errno; 1622 (void)close(ptmpfd); 1623 (void)pw_abort(); 1624 errno = serrno; 1625 err(EXIT_FAILURE, "Can't modify user " 1626 "`%s': write", login_name); 1627 } 1628 } 1629 } else { 1630 len = strlen(buf); 1631 if ((cc = write(ptmpfd, buf, len)) != len) { 1632 int serrno = errno; 1633 (void)close(masterfd); 1634 (void)close(ptmpfd); 1635 (void)pw_abort(); 1636 errno = serrno; 1637 err(EXIT_FAILURE, "Can't modify `%s': " 1638 "write", login_name); 1639 } 1640 } 1641 } 1642 if (up != NULL) { 1643 if ((up->u_flags & F_MKDIR) && 1644 asystem("%s %s %s", MV, homedir, pwp->pw_dir) != 0) { 1645 (void)close(ptmpfd); 1646 (void)pw_abort(); 1647 errx(EXIT_FAILURE, "Can't modify user `%s': " 1648 "can't move `%s' to `%s'", 1649 login_name, homedir, pwp->pw_dir); 1650 } 1651 if (up->u_groupc > 0 && 1652 !append_group(newlogin, up->u_groupc, up->u_groupv)) { 1653 (void)close(ptmpfd); 1654 (void)pw_abort(); 1655 errx(EXIT_FAILURE, "Can't modify user `%s': " 1656 "can't append `%s' to new groups", 1657 login_name, newlogin); 1658 } 1659 } 1660 (void)close(ptmpfd); 1661 #if PW_MKDB_ARGC == 2 1662 if (up != NULL && strcmp(login_name, newlogin) == 0) { 1663 error = pw_mkdb(login_name, 0); 1664 } else { 1665 error = pw_mkdb(NULL, 0); 1666 } 1667 #else 1668 error = pw_mkdb(); 1669 #endif 1670 if (error < 0) { 1671 (void)pw_abort(); 1672 errx(EXIT_FAILURE, "Can't modify user `%s': pw_mkdb failed", 1673 login_name); 1674 } 1675 if (up == NULL) { 1676 syslog(LOG_INFO, "User removed: name=%s", login_name); 1677 } else if (strcmp(login_name, newlogin) == 0) { 1678 syslog(LOG_INFO, "User information modified: name=%s, uid=%d, " 1679 "gid=%d, home=%s, shell=%s", 1680 login_name, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, 1681 pwp->pw_shell); 1682 } else { 1683 syslog(LOG_INFO, "User information modified: name=%s, " 1684 "new name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1685 login_name, newlogin, pwp->pw_uid, pwp->pw_gid, 1686 pwp->pw_dir, pwp->pw_shell); 1687 } 1688 return 1; 1689 } 1690 1691 #ifdef EXTENSIONS 1692 /* see if we can find out the user struct */ 1693 static struct passwd * 1694 find_user_info(const char *name) 1695 { 1696 struct passwd *pwp; 1697 1698 if ((pwp = getpwnam(name)) != NULL) { 1699 return pwp; 1700 } 1701 if (is_number(name) && (pwp = getpwuid((uid_t)atoi(name))) != NULL) { 1702 return pwp; 1703 } 1704 return NULL; 1705 } 1706 #endif 1707 1708 /* see if we can find out the group struct */ 1709 static struct group * 1710 find_group_info(const char *name) 1711 { 1712 struct group *grp; 1713 1714 if ((grp = getgrnam(name)) != NULL) { 1715 return grp; 1716 } 1717 if (is_number(name) && (grp = getgrgid((gid_t)atoi(name))) != NULL) { 1718 return grp; 1719 } 1720 return NULL; 1721 } 1722 1723 /* print out usage message, and then exit */ 1724 void 1725 usermgmt_usage(const char *prog) 1726 { 1727 if (strcmp(prog, "useradd") == 0) { 1728 (void)fprintf(stderr, "usage: %s -D [-F] [-b base-dir] " 1729 "[-e expiry-time] [-f inactive-time]\n" 1730 "\t[-g gid | name | =uid] [-k skel-dir] [-L login-class]\n" 1731 "\t[-r lowuid..highuid] [-s shell]\n", prog); 1732 (void)fprintf(stderr, "usage: %s [-moSv] [-b base-dir] " 1733 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1734 "\t[-f inactive-time] [-G secondary-group] " 1735 "[-g gid | name | =uid]\n" 1736 "\t[-k skeletondir] [-L login-class] [-p password] " 1737 "[-r lowuid..highuid]\n" 1738 "\t[-s shell] [-u uid] user\n", 1739 prog); 1740 } else if (strcmp(prog, "usermod") == 0) { 1741 (void)fprintf(stderr, "usage: %s [-FmoSv] [-C yes/no] " 1742 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1743 "\t[-f inactive] [-G secondary-group] " 1744 "[-g gid | name | =uid]\n" 1745 "\t[-L login-class] [-l new-login] [-p password] " 1746 "[-s shell] [-u uid]\n" 1747 "\tuser\n", prog); 1748 } else if (strcmp(prog, "userdel") == 0) { 1749 (void)fprintf(stderr, "usage: %s -D [-p preserve-value]\n", prog); 1750 (void)fprintf(stderr, 1751 "usage: %s [-rSv] [-p preserve-value] user\n", prog); 1752 #ifdef EXTENSIONS 1753 } else if (strcmp(prog, "userinfo") == 0) { 1754 (void)fprintf(stderr, "usage: %s [-ev] user\n", prog); 1755 #endif 1756 } else if (strcmp(prog, "groupadd") == 0) { 1757 (void)fprintf(stderr, "usage: %s [-ov] [-g gid]" 1758 " [-r lowgid..highgid] group\n", prog); 1759 } else if (strcmp(prog, "groupdel") == 0) { 1760 (void)fprintf(stderr, "usage: %s [-v] group\n", prog); 1761 } else if (strcmp(prog, "groupmod") == 0) { 1762 (void)fprintf(stderr, 1763 "usage: %s [-ov] [-g gid] [-n newname] group\n", prog); 1764 } else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) { 1765 (void)fprintf(stderr, 1766 "usage: %s ( add | del | mod | info ) ...\n", prog); 1767 #ifdef EXTENSIONS 1768 } else if (strcmp(prog, "groupinfo") == 0) { 1769 (void)fprintf(stderr, "usage: %s [-ev] group\n", prog); 1770 #endif 1771 } 1772 exit(EXIT_FAILURE); 1773 /* NOTREACHED */ 1774 } 1775 1776 #ifdef EXTENSIONS 1777 #define ADD_OPT_EXTENSIONS "p:r:vL:S" 1778 #else 1779 #define ADD_OPT_EXTENSIONS 1780 #endif 1781 1782 int 1783 useradd(int argc, char **argv) 1784 { 1785 user_t u; 1786 int defaultfield; 1787 int bigD; 1788 int c; 1789 #ifdef EXTENSIONS 1790 int i; 1791 #endif 1792 1793 (void)memset(&u, 0, sizeof(u)); 1794 read_defaults(&u); 1795 u.u_uid = -1; 1796 defaultfield = bigD = 0; 1797 while ((c = getopt(argc, argv, "DFG:b:c:d:e:f:g:k:mou:s:" 1798 ADD_OPT_EXTENSIONS)) != -1) { 1799 switch(c) { 1800 case 'D': 1801 bigD = 1; 1802 break; 1803 case 'F': 1804 /* 1805 * Setting -1 will force the new user to 1806 * change their password as soon as they 1807 * next log in - passwd(5). 1808 */ 1809 defaultfield = 1; 1810 memsave(&u.u_inactive, "-1", strlen("-1")); 1811 break; 1812 case 'G': 1813 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1814 u.u_groupc < NGROUPS_MAX) { 1815 if (u.u_groupv[u.u_groupc][0] != 0) { 1816 u.u_groupc++; 1817 } 1818 } 1819 if (optarg != NULL) { 1820 warnx("Truncated list of secondary groups " 1821 "to %d entries", NGROUPS_MAX); 1822 } 1823 break; 1824 #ifdef EXTENSIONS 1825 case 'S': 1826 u.u_allow_samba = 1; 1827 break; 1828 #endif 1829 case 'b': 1830 defaultfield = 1; 1831 memsave(&u.u_basedir, optarg, strlen(optarg)); 1832 break; 1833 case 'c': 1834 memsave(&u.u_comment, optarg, strlen(optarg)); 1835 break; 1836 case 'd': 1837 memsave(&u.u_home, optarg, strlen(optarg)); 1838 u.u_flags |= F_HOMEDIR; 1839 break; 1840 case 'e': 1841 defaultfield = 1; 1842 memsave(&u.u_expire, optarg, strlen(optarg)); 1843 break; 1844 case 'f': 1845 defaultfield = 1; 1846 memsave(&u.u_inactive, optarg, strlen(optarg)); 1847 break; 1848 case 'g': 1849 defaultfield = 1; 1850 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1851 break; 1852 case 'k': 1853 defaultfield = 1; 1854 memsave(&u.u_skeldir, optarg, strlen(optarg)); 1855 break; 1856 #ifdef EXTENSIONS 1857 case 'L': 1858 defaultfield = 1; 1859 memsave(&u.u_class, optarg, strlen(optarg)); 1860 break; 1861 #endif 1862 case 'm': 1863 u.u_flags |= F_MKDIR; 1864 break; 1865 case 'o': 1866 u.u_flags |= F_DUPUID; 1867 break; 1868 #ifdef EXTENSIONS 1869 case 'p': 1870 memsave(&u.u_password, optarg, strlen(optarg)); 1871 break; 1872 #endif 1873 #ifdef EXTENSIONS 1874 case 'r': 1875 defaultfield = 1; 1876 (void)save_range(&u, optarg); 1877 break; 1878 #endif 1879 case 's': 1880 u.u_flags |= F_SHELL; 1881 defaultfield = 1; 1882 memsave(&u.u_shell, optarg, strlen(optarg)); 1883 break; 1884 case 'u': 1885 u.u_uid = check_numeric(optarg, "uid"); 1886 break; 1887 #ifdef EXTENSIONS 1888 case 'v': 1889 verbose = 1; 1890 break; 1891 #endif 1892 default: 1893 usermgmt_usage("useradd"); 1894 /* NOTREACHED */ 1895 } 1896 } 1897 if (bigD) { 1898 if (defaultfield) { 1899 checkeuid(); 1900 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1901 } 1902 (void)printf("group\t\t%s\n", u.u_primgrp); 1903 (void)printf("base_dir\t%s\n", u.u_basedir); 1904 (void)printf("skel_dir\t%s\n", u.u_skeldir); 1905 (void)printf("shell\t\t%s\n", u.u_shell); 1906 #ifdef EXTENSIONS 1907 (void)printf("class\t\t%s\n", u.u_class); 1908 #endif 1909 (void)printf("inactive\t%s\n", (u.u_inactive == NULL) ? 1910 UNSET_INACTIVE : u.u_inactive); 1911 (void)printf("expire\t\t%s\n", (u.u_expire == NULL) ? 1912 UNSET_EXPIRY : u.u_expire); 1913 #ifdef EXTENSIONS 1914 for (i = 0 ; i < u.u_rc ; i++) { 1915 (void)printf("range\t\t%d..%d\n", 1916 u.u_rv[i].r_from, u.u_rv[i].r_to); 1917 } 1918 #endif 1919 return EXIT_SUCCESS; 1920 } 1921 argc -= optind; 1922 argv += optind; 1923 if (argc != 1) { 1924 usermgmt_usage("useradd"); 1925 } 1926 checkeuid(); 1927 openlog("useradd", LOG_PID, LOG_USER); 1928 return adduser(*argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1929 } 1930 1931 #ifdef EXTENSIONS 1932 #define MOD_OPT_EXTENSIONS "p:vL:S" 1933 #else 1934 #define MOD_OPT_EXTENSIONS 1935 #endif 1936 1937 int 1938 usermod(int argc, char **argv) 1939 { 1940 user_t u; 1941 char newuser[MaxUserNameLen + 1]; 1942 int c, have_new_user; 1943 1944 (void)memset(&u, 0, sizeof(u)); 1945 (void)memset(newuser, 0, sizeof(newuser)); 1946 read_defaults(&u); 1947 have_new_user = 0; 1948 u.u_locked = -1; 1949 while ((c = getopt(argc, argv, "C:FG:c:d:e:f:g:l:mos:u:" 1950 MOD_OPT_EXTENSIONS)) != -1) { 1951 switch(c) { 1952 case 'G': 1953 while ((u.u_groupv[u.u_groupc] = 1954 strsep(&optarg, ",")) != NULL && 1955 u.u_groupc < NGROUPS_MAX) { 1956 if (u.u_groupv[u.u_groupc][0] != 0) { 1957 u.u_groupc++; 1958 } 1959 } 1960 if (optarg != NULL) { 1961 warnx("Truncated list of secondary groups " 1962 "to %d entries", NGROUPS_MAX); 1963 } 1964 u.u_flags |= F_SECGROUP; 1965 break; 1966 #ifdef EXTENSIONS 1967 case 'S': 1968 u.u_allow_samba = 1; 1969 break; 1970 #endif 1971 case 'c': 1972 memsave(&u.u_comment, optarg, strlen(optarg)); 1973 u.u_flags |= F_COMMENT; 1974 break; 1975 case 'C': 1976 if (strcasecmp(optarg, "yes") == 0) { 1977 u.u_locked = LOCK; 1978 } else if (strcasecmp(optarg, "no") == 0) { 1979 u.u_locked = UNLOCK; 1980 } else { 1981 /* No idea. */ 1982 errx(EXIT_FAILURE, 1983 "Please type 'yes' or 'no'"); 1984 } 1985 break; 1986 case 'F': 1987 memsave(&u.u_inactive, "-1", strlen("-1")); 1988 u.u_flags |= F_INACTIVE; 1989 break; 1990 case 'd': 1991 memsave(&u.u_home, optarg, strlen(optarg)); 1992 u.u_flags |= F_HOMEDIR; 1993 break; 1994 case 'e': 1995 memsave(&u.u_expire, optarg, strlen(optarg)); 1996 u.u_flags |= F_EXPIRE; 1997 break; 1998 case 'f': 1999 memsave(&u.u_inactive, optarg, strlen(optarg)); 2000 u.u_flags |= F_INACTIVE; 2001 break; 2002 case 'g': 2003 memsave(&u.u_primgrp, optarg, strlen(optarg)); 2004 u.u_flags |= F_GROUP; 2005 break; 2006 case 'l': 2007 (void)strlcpy(newuser, optarg, sizeof(newuser)); 2008 have_new_user = 1; 2009 u.u_flags |= F_USERNAME; 2010 break; 2011 #ifdef EXTENSIONS 2012 case 'L': 2013 memsave(&u.u_class, optarg, strlen(optarg)); 2014 u.u_flags |= F_CLASS; 2015 break; 2016 #endif 2017 case 'm': 2018 u.u_flags |= F_MKDIR; 2019 break; 2020 case 'o': 2021 u.u_flags |= F_DUPUID; 2022 break; 2023 #ifdef EXTENSIONS 2024 case 'p': 2025 memsave(&u.u_password, optarg, strlen(optarg)); 2026 u.u_flags |= F_PASSWORD; 2027 break; 2028 #endif 2029 case 's': 2030 memsave(&u.u_shell, optarg, strlen(optarg)); 2031 u.u_flags |= F_SHELL; 2032 break; 2033 case 'u': 2034 u.u_uid = check_numeric(optarg, "uid"); 2035 u.u_flags |= F_UID; 2036 break; 2037 #ifdef EXTENSIONS 2038 case 'v': 2039 verbose = 1; 2040 break; 2041 #endif 2042 default: 2043 usermgmt_usage("usermod"); 2044 /* NOTREACHED */ 2045 } 2046 } 2047 if ((u.u_flags & F_MKDIR) && !(u.u_flags & F_HOMEDIR) && 2048 !(u.u_flags & F_USERNAME)) { 2049 warnx("Option 'm' useless without 'd' or 'l' -- ignored"); 2050 u.u_flags &= ~F_MKDIR; 2051 } 2052 argc -= optind; 2053 argv += optind; 2054 if (argc != 1) { 2055 usermgmt_usage("usermod"); 2056 } 2057 checkeuid(); 2058 openlog("usermod", LOG_PID, LOG_USER); 2059 return moduser(*argv, (have_new_user) ? newuser : *argv, &u, 2060 u.u_allow_samba) ? EXIT_SUCCESS : EXIT_FAILURE; 2061 } 2062 2063 #ifdef EXTENSIONS 2064 #define DEL_OPT_EXTENSIONS "Dp:vS" 2065 #else 2066 #define DEL_OPT_EXTENSIONS 2067 #endif 2068 2069 int 2070 userdel(int argc, char **argv) 2071 { 2072 struct passwd *pwp; 2073 user_t u; 2074 char password[PasswordLength + 1]; 2075 int defaultfield; 2076 int rmhome; 2077 int bigD; 2078 int c; 2079 2080 (void)memset(&u, 0, sizeof(u)); 2081 read_defaults(&u); 2082 defaultfield = bigD = rmhome = 0; 2083 while ((c = getopt(argc, argv, "r" DEL_OPT_EXTENSIONS)) != -1) { 2084 switch(c) { 2085 #ifdef EXTENSIONS 2086 case 'D': 2087 bigD = 1; 2088 break; 2089 #endif 2090 #ifdef EXTENSIONS 2091 case 'S': 2092 u.u_allow_samba = 1; 2093 break; 2094 #endif 2095 #ifdef EXTENSIONS 2096 case 'p': 2097 defaultfield = 1; 2098 u.u_preserve = (strcmp(optarg, "true") == 0) ? 1 : 2099 (strcmp(optarg, "yes") == 0) ? 1 : 2100 atoi(optarg); 2101 break; 2102 #endif 2103 case 'r': 2104 rmhome = 1; 2105 break; 2106 #ifdef EXTENSIONS 2107 case 'v': 2108 verbose = 1; 2109 break; 2110 #endif 2111 default: 2112 usermgmt_usage("userdel"); 2113 /* NOTREACHED */ 2114 } 2115 } 2116 #ifdef EXTENSIONS 2117 if (bigD) { 2118 if (defaultfield) { 2119 checkeuid(); 2120 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 2121 } 2122 (void)printf("preserve\t%s\n", (u.u_preserve) ? "true" : 2123 "false"); 2124 return EXIT_SUCCESS; 2125 } 2126 #endif 2127 argc -= optind; 2128 argv += optind; 2129 if (argc != 1) { 2130 usermgmt_usage("userdel"); 2131 } 2132 checkeuid(); 2133 if ((pwp = getpwnam(*argv)) == NULL) { 2134 warnx("No such user `%s'", *argv); 2135 return EXIT_FAILURE; 2136 } 2137 if (rmhome) { 2138 (void)removehomedir(pwp); 2139 } 2140 if (u.u_preserve) { 2141 u.u_flags |= F_SHELL; 2142 memsave(&u.u_shell, NOLOGIN, strlen(NOLOGIN)); 2143 (void)memset(password, '*', DES_Len); 2144 password[DES_Len] = 0; 2145 memsave(&u.u_password, password, strlen(password)); 2146 u.u_flags |= F_PASSWORD; 2147 openlog("userdel", LOG_PID, LOG_USER); 2148 return moduser(*argv, *argv, &u, u.u_allow_samba) ? 2149 EXIT_SUCCESS : EXIT_FAILURE; 2150 } 2151 if (!rm_user_from_groups(*argv)) { 2152 return 0; 2153 } 2154 openlog("userdel", LOG_PID, LOG_USER); 2155 return moduser(*argv, *argv, NULL, u.u_allow_samba) ? 2156 EXIT_SUCCESS : EXIT_FAILURE; 2157 } 2158 2159 #ifdef EXTENSIONS 2160 #define GROUP_ADD_OPT_EXTENSIONS "r:v" 2161 #else 2162 #define GROUP_ADD_OPT_EXTENSIONS 2163 #endif 2164 2165 /* add a group */ 2166 int 2167 groupadd(int argc, char **argv) 2168 { 2169 int dupgid; 2170 int gid; 2171 int c; 2172 int lowgid; 2173 int highgid; 2174 2175 gid = -1; 2176 dupgid = 0; 2177 lowgid = LowGid; 2178 highgid = HighGid; 2179 while ((c = getopt(argc, argv, "g:o" GROUP_ADD_OPT_EXTENSIONS)) != -1) { 2180 switch(c) { 2181 case 'g': 2182 gid = check_numeric(optarg, "gid"); 2183 break; 2184 case 'o': 2185 dupgid = 1; 2186 break; 2187 #ifdef EXTENSIONS 2188 case 'r': 2189 if (sscanf(optarg, "%d..%d", &lowgid, &highgid) != 2) { 2190 errx(EXIT_FAILURE, "Bad range `%s'", optarg); 2191 } 2192 break; 2193 case 'v': 2194 verbose = 1; 2195 break; 2196 #endif 2197 default: 2198 usermgmt_usage("groupadd"); 2199 /* NOTREACHED */ 2200 } 2201 } 2202 argc -= optind; 2203 argv += optind; 2204 if (argc != 1) { 2205 usermgmt_usage("groupadd"); 2206 } 2207 checkeuid(); 2208 if (gid < 0 && !getnextgid(&gid, lowgid, highgid)) { 2209 err(EXIT_FAILURE, "Can't add group: can't get next gid"); 2210 } 2211 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 2212 errx(EXIT_FAILURE, "Can't add group: gid %d is a duplicate", 2213 gid); 2214 } 2215 if (!valid_group(*argv)) { 2216 warnx("Invalid group name `%s'", *argv); 2217 } 2218 openlog("groupadd", LOG_PID, LOG_USER); 2219 if (!creategid(*argv, gid, "")) 2220 exit(EXIT_FAILURE); 2221 2222 return EXIT_SUCCESS; 2223 } 2224 2225 #ifdef EXTENSIONS 2226 #define GROUP_DEL_OPT_EXTENSIONS "v" 2227 #else 2228 #define GROUP_DEL_OPT_EXTENSIONS 2229 #endif 2230 2231 /* remove a group */ 2232 int 2233 groupdel(int argc, char **argv) 2234 { 2235 int c; 2236 2237 while ((c = getopt(argc, argv, "" GROUP_DEL_OPT_EXTENSIONS)) != -1) { 2238 switch(c) { 2239 #ifdef EXTENSIONS 2240 case 'v': 2241 verbose = 1; 2242 break; 2243 #endif 2244 default: 2245 usermgmt_usage("groupdel"); 2246 /* NOTREACHED */ 2247 } 2248 } 2249 argc -= optind; 2250 argv += optind; 2251 if (argc != 1) { 2252 usermgmt_usage("groupdel"); 2253 } 2254 if (getgrnam(*argv) == NULL) { 2255 errx(EXIT_FAILURE, "No such group `%s'", *argv); 2256 } 2257 checkeuid(); 2258 openlog("groupdel", LOG_PID, LOG_USER); 2259 if (!modify_gid(*argv, NULL)) 2260 exit(EXIT_FAILURE); 2261 2262 return EXIT_SUCCESS; 2263 } 2264 2265 #ifdef EXTENSIONS 2266 #define GROUP_MOD_OPT_EXTENSIONS "v" 2267 #else 2268 #define GROUP_MOD_OPT_EXTENSIONS 2269 #endif 2270 2271 /* modify a group */ 2272 int 2273 groupmod(int argc, char **argv) 2274 { 2275 struct group *grp; 2276 char buf[MaxEntryLen]; 2277 char *newname; 2278 char **cpp; 2279 int dupgid; 2280 int gid; 2281 int cc; 2282 int c; 2283 2284 gid = -1; 2285 dupgid = 0; 2286 newname = NULL; 2287 while ((c = getopt(argc, argv, "g:on:" GROUP_MOD_OPT_EXTENSIONS)) != -1) { 2288 switch(c) { 2289 case 'g': 2290 gid = check_numeric(optarg, "gid"); 2291 break; 2292 case 'o': 2293 dupgid = 1; 2294 break; 2295 case 'n': 2296 memsave(&newname, optarg, strlen(optarg)); 2297 break; 2298 #ifdef EXTENSIONS 2299 case 'v': 2300 verbose = 1; 2301 break; 2302 #endif 2303 default: 2304 usermgmt_usage("groupmod"); 2305 /* NOTREACHED */ 2306 } 2307 } 2308 argc -= optind; 2309 argv += optind; 2310 if (argc != 1) { 2311 usermgmt_usage("groupmod"); 2312 } 2313 checkeuid(); 2314 if (gid < 0 && newname == NULL) { 2315 errx(EXIT_FAILURE, "Nothing to change"); 2316 } 2317 if (dupgid && gid < 0) { 2318 errx(EXIT_FAILURE, "Duplicate which gid?"); 2319 } 2320 if ((grp = find_group_info(*argv)) == NULL) { 2321 errx(EXIT_FAILURE, "Can't find group `%s' to modify", *argv); 2322 } 2323 if (!is_local(*argv, _PATH_GROUP)) { 2324 errx(EXIT_FAILURE, "Group `%s' must be a local group", *argv); 2325 } 2326 if (newname != NULL && !valid_group(newname)) { 2327 warnx("Invalid group name `%s'", newname); 2328 } 2329 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:", 2330 (newname) ? newname : grp->gr_name, 2331 grp->gr_passwd, 2332 (gid < 0) ? grp->gr_gid : gid); 2333 for (cpp = grp->gr_mem ; *cpp && cc < sizeof(buf) ; cpp++) { 2334 cc += snprintf(&buf[cc], sizeof(buf) - cc, "%s%s", *cpp, 2335 (cpp[1] == NULL) ? "" : ","); 2336 } 2337 cc += snprintf(&buf[cc], sizeof(buf) - cc, "\n"); 2338 openlog("groupmod", LOG_PID, LOG_USER); 2339 if (!modify_gid(*argv, buf)) 2340 exit(EXIT_FAILURE); 2341 2342 return EXIT_SUCCESS; 2343 } 2344 2345 #ifdef EXTENSIONS 2346 /* display user information */ 2347 int 2348 userinfo(int argc, char **argv) 2349 { 2350 struct passwd *pwp; 2351 struct group *grp; 2352 char buf[MaxEntryLen]; 2353 char **cpp; 2354 int exists; 2355 int cc; 2356 int i; 2357 2358 exists = 0; 2359 while ((i = getopt(argc, argv, "ev")) != -1) { 2360 switch(i) { 2361 case 'e': 2362 exists = 1; 2363 break; 2364 case 'v': 2365 verbose = 1; 2366 break; 2367 default: 2368 usermgmt_usage("userinfo"); 2369 /* NOTREACHED */ 2370 } 2371 } 2372 argc -= optind; 2373 argv += optind; 2374 if (argc != 1) { 2375 usermgmt_usage("userinfo"); 2376 } 2377 pwp = find_user_info(*argv); 2378 if (exists) { 2379 exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE); 2380 } 2381 if (pwp == NULL) { 2382 errx(EXIT_FAILURE, "Can't find user `%s'", *argv); 2383 } 2384 (void)printf("login\t%s\n", pwp->pw_name); 2385 (void)printf("passwd\t%s\n", pwp->pw_passwd); 2386 (void)printf("uid\t%d\n", pwp->pw_uid); 2387 for (cc = 0 ; (grp = getgrent()) != NULL ; ) { 2388 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2389 if (strcmp(*cpp, *argv) == 0 && 2390 grp->gr_gid != pwp->pw_gid) { 2391 cc += snprintf(&buf[cc], sizeof(buf) - cc, 2392 "%s ", grp->gr_name); 2393 } 2394 } 2395 } 2396 if ((grp = getgrgid(pwp->pw_gid)) == NULL) { 2397 (void)printf("groups\t%d %s\n", pwp->pw_gid, buf); 2398 } else { 2399 (void)printf("groups\t%s %s\n", grp->gr_name, buf); 2400 } 2401 (void)printf("change\t%s", pwp->pw_change > 0 ? 2402 ctime(&pwp->pw_change) : pwp->pw_change == -1 ? 2403 "NEXT LOGIN\n" : "NEVER\n"); 2404 (void)printf("class\t%s\n", pwp->pw_class); 2405 (void)printf("gecos\t%s\n", pwp->pw_gecos); 2406 (void)printf("dir\t%s\n", pwp->pw_dir); 2407 (void)printf("shell\t%s\n", pwp->pw_shell); 2408 (void)printf("expire\t%s", pwp->pw_expire ? 2409 ctime(&pwp->pw_expire) : "NEVER\n"); 2410 return EXIT_SUCCESS; 2411 } 2412 #endif 2413 2414 #ifdef EXTENSIONS 2415 /* display user information */ 2416 int 2417 groupinfo(int argc, char **argv) 2418 { 2419 struct group *grp; 2420 char **cpp; 2421 int exists; 2422 int i; 2423 2424 exists = 0; 2425 while ((i = getopt(argc, argv, "ev")) != -1) { 2426 switch(i) { 2427 case 'e': 2428 exists = 1; 2429 break; 2430 case 'v': 2431 verbose = 1; 2432 break; 2433 default: 2434 usermgmt_usage("groupinfo"); 2435 /* NOTREACHED */ 2436 } 2437 } 2438 argc -= optind; 2439 argv += optind; 2440 if (argc != 1) { 2441 usermgmt_usage("groupinfo"); 2442 } 2443 grp = find_group_info(*argv); 2444 if (exists) { 2445 exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE); 2446 } 2447 if (grp == NULL) { 2448 errx(EXIT_FAILURE, "Can't find group `%s'", *argv); 2449 } 2450 (void)printf("name\t%s\n", grp->gr_name); 2451 (void)printf("passwd\t%s\n", grp->gr_passwd); 2452 (void)printf("gid\t%d\n", grp->gr_gid); 2453 (void)printf("members\t"); 2454 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2455 (void)printf("%s", *cpp); 2456 if (*(cpp + 1)) { 2457 (void) printf(", "); 2458 } 2459 } 2460 (void)fputc('\n', stdout); 2461 return EXIT_SUCCESS; 2462 } 2463 #endif 2464