1 /* $NetBSD: user.c,v 1.101 2006/01/13 16:36:33 elad 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 1.101 2006/01/13 16:36:33 elad 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 static int 929 valid_class(char *class) 930 { 931 login_cap_t *lc; 932 933 if (class == NULL || *class == '\0') { 934 return 1; 935 } 936 /* 937 * Check if /etc/login.conf exists. login_getclass() will 938 * return 1 due to it not existing, so not informing the 939 * user the actual login class does not exist. 940 */ 941 942 if (access(PATH_LOGINCONF, R_OK) == -1) { 943 warn("Access failed for `%s'; will not validate class `%s'", 944 PATH_LOGINCONF, class); 945 return 1; 946 } 947 948 if ((lc = login_getclass(class)) != NULL) { 949 login_close(lc); 950 return 1; 951 } 952 return 0; 953 } 954 955 static int 956 valid_shell(const char *shellname) 957 { 958 char *shellp; 959 960 if (access(_PATH_SHELLS, R_OK) == -1) { 961 /* Don't exit */ 962 warn("Access failed for `%s'; will not validate shell `%s'", 963 _PATH_SHELLS, shellname); 964 return 1; 965 } 966 967 if (strcmp(shellname, "/sbin/nologin") == 0) 968 return 0; 969 970 while ((shellp = getusershell()) != NULL) 971 if (strcmp(shellp, shellname) == 0) 972 return 1; 973 974 return 0; 975 } 976 #endif 977 978 /* look for a valid time, return 0 if it was specified but bad */ 979 static int 980 scantime(time_t *tp, char *s) 981 { 982 struct tm tm; 983 char *ep; 984 long val; 985 986 *tp = 0; 987 if (s != NULL) { 988 (void)memset(&tm, 0, sizeof(tm)); 989 if (strptime(s, "%c", &tm) != NULL) { 990 *tp = mktime(&tm); 991 return (*tp == -1) ? 0 : 1; 992 } else if (strptime(s, "%B %d %Y", &tm) != NULL) { 993 *tp = mktime(&tm); 994 return (*tp == -1) ? 0 : 1; 995 } else { 996 errno = 0; 997 *tp = val = strtol(s, &ep, 10); 998 if (*ep != '\0' || *tp < -1 || errno == ERANGE) { 999 *tp = 0; 1000 return 0; 1001 } 1002 if (*tp != val) { 1003 return 0; 1004 } 1005 } 1006 } 1007 return 1; 1008 } 1009 1010 /* add a user */ 1011 static int 1012 adduser(char *login_name, user_t *up) 1013 { 1014 struct group *grp; 1015 struct stat st; 1016 time_t expire; 1017 time_t inactive; 1018 char password[PasswordLength + 1]; 1019 char home[MaxFileNameLen]; 1020 char buf[MaxFileNameLen]; 1021 int sync_uid_gid; 1022 int masterfd; 1023 int ptmpfd; 1024 int gid; 1025 int cc; 1026 int i; 1027 1028 if (!valid_login(login_name, up->u_allow_samba)) { 1029 errx(EXIT_FAILURE, "Can't add user `%s': invalid login name", login_name); 1030 } 1031 #ifdef EXTENSIONS 1032 if (!valid_class(up->u_class)) { 1033 errx(EXIT_FAILURE, "Can't add user `%s': no such login class `%s'", 1034 login_name, up->u_class); 1035 } 1036 #endif 1037 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1038 err(EXIT_FAILURE, "Can't add user `%s': can't open `%s'", 1039 login_name, _PATH_MASTERPASSWD); 1040 } 1041 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1042 err(EXIT_FAILURE, "Can't add user `%s': can't lock `%s'", 1043 login_name, _PATH_MASTERPASSWD); 1044 } 1045 pw_init(); 1046 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1047 int serrno = errno; 1048 (void)close(masterfd); 1049 errno = serrno; 1050 err(EXIT_FAILURE, "Can't add user `%s': can't obtain pw_lock", 1051 login_name); 1052 } 1053 while ((cc = read(masterfd, buf, sizeof(buf))) > 0) { 1054 if (write(ptmpfd, buf, (size_t)(cc)) != cc) { 1055 int serrno = errno; 1056 (void)close(masterfd); 1057 (void)close(ptmpfd); 1058 (void)pw_abort(); 1059 errno = serrno; 1060 err(EXIT_FAILURE, "Can't add user `%s': " 1061 "short write to /etc/ptmp", login_name); 1062 } 1063 } 1064 /* if no uid was specified, get next one in [low_uid..high_uid] range */ 1065 sync_uid_gid = (strcmp(up->u_primgrp, "=uid") == 0); 1066 if (up->u_uid == -1) { 1067 int got_id = 0; 1068 1069 /* 1070 * Look for a free UID in the command line ranges (if any). 1071 * These start after the ranges specified in the config file. 1072 */ 1073 for (i = up->u_defrc; !got_id && i < up->u_rc ; i++) { 1074 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1075 up->u_rv[i].r_from, up->u_rv[i].r_to); 1076 } 1077 /* 1078 * If there were no free UIDs in the command line ranges, 1079 * try the ranges from the config file (there will always 1080 * be at least one default). 1081 */ 1082 for (i = 0; !got_id && i < up->u_defrc; i++) { 1083 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1084 up->u_rv[i].r_from, up->u_rv[i].r_to); 1085 } 1086 if (!got_id) { 1087 (void)close(ptmpfd); 1088 (void)pw_abort(); 1089 errx(EXIT_FAILURE, "Can't add user `%s': " 1090 "can't get next uid for %d", login_name, 1091 up->u_uid); 1092 } 1093 } 1094 /* check uid isn't already allocated */ 1095 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1096 (void)close(ptmpfd); 1097 (void)pw_abort(); 1098 errx(EXIT_FAILURE, "Can't add user `%s': " 1099 "uid %d is already in use", login_name, up->u_uid); 1100 } 1101 /* if -g=uid was specified, check gid is unused */ 1102 if (sync_uid_gid) { 1103 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1104 (void)close(ptmpfd); 1105 (void)pw_abort(); 1106 errx(EXIT_FAILURE, "Can't add user `%s': " 1107 "gid %d is already in use", login_name, 1108 up->u_uid); 1109 } 1110 gid = up->u_uid; 1111 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1112 gid = grp->gr_gid; 1113 } else if (is_number(up->u_primgrp) && 1114 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1115 gid = grp->gr_gid; 1116 } else { 1117 (void)close(ptmpfd); 1118 (void)pw_abort(); 1119 errx(EXIT_FAILURE, "Can't add user `%s': group %s not found", 1120 login_name, up->u_primgrp); 1121 } 1122 /* check name isn't already in use */ 1123 if (!(up->u_flags & F_DUPUID) && getpwnam(login_name) != NULL) { 1124 (void)close(ptmpfd); 1125 (void)pw_abort(); 1126 errx(EXIT_FAILURE, "Can't add user `%s': " 1127 "`%s' is already a user", login_name, login_name); 1128 } 1129 if (up->u_flags & F_HOMEDIR) { 1130 (void)strlcpy(home, up->u_home, sizeof(home)); 1131 } else { 1132 /* if home directory hasn't been given, make it up */ 1133 (void)snprintf(home, sizeof(home), "%s/%s", up->u_basedir, 1134 login_name); 1135 } 1136 if (up->u_flags & F_SHELL) { 1137 #ifdef EXTENSIONS 1138 if (!valid_shell(up->u_shell)) { 1139 (void)close(ptmpfd); 1140 (void)pw_abort(); 1141 errx(EXIT_FAILURE, "Can't add user `%s': " 1142 "shell `%s' is not valid", login_name, up->u_shell); 1143 } 1144 #endif 1145 } 1146 1147 if (!scantime(&inactive, up->u_inactive)) { 1148 warnx("Warning: inactive time `%s' invalid, password expiry off", 1149 up->u_inactive); 1150 } 1151 if (!scantime(&expire, up->u_expire) || expire == -1) { 1152 warnx("Warning: expire time `%s' invalid, account expiry off", 1153 up->u_expire); 1154 expire = 0; /* Just in case. */ 1155 } 1156 if (lstat(home, &st) < 0 && !(up->u_flags & F_MKDIR)) { 1157 warnx("Warning: home directory `%s' doesn't exist, " 1158 "and -m was not specified", home); 1159 } 1160 password[sizeof(password) - 1] = '\0'; 1161 if (up->u_password != NULL && valid_password_length(up->u_password)) { 1162 (void)strlcpy(password, up->u_password, sizeof(password)); 1163 } else { 1164 (void)memset(password, '*', DES_Len); 1165 password[DES_Len] = 0; 1166 if (up->u_password != NULL) { 1167 warnx("Password `%s' is invalid: setting it to `%s'", 1168 up->u_password, password); 1169 } 1170 } 1171 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1172 login_name, 1173 password, 1174 up->u_uid, 1175 gid, 1176 #ifdef EXTENSIONS 1177 up->u_class, 1178 #else 1179 "", 1180 #endif 1181 (long) inactive, 1182 (long) expire, 1183 up->u_comment, 1184 home, 1185 up->u_shell); 1186 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1187 int serrno = errno; 1188 (void)close(ptmpfd); 1189 (void)pw_abort(); 1190 errno = serrno; 1191 err(EXIT_FAILURE, "Can't add user `%s': write failed", 1192 login_name); 1193 } 1194 if (up->u_flags & F_MKDIR) { 1195 if (lstat(home, &st) == 0) { 1196 (void)close(ptmpfd); 1197 (void)pw_abort(); 1198 errx(EXIT_FAILURE, 1199 "Can't add user `%s': home directory `%s' " 1200 "already exists", login_name, home); 1201 } else { 1202 if (asystem("%s -p %s", MKDIR, home) != 0) { 1203 (void)close(ptmpfd); 1204 (void)pw_abort(); 1205 errx(EXIT_FAILURE, "Can't add user `%s': " 1206 "can't mkdir `%s'", login_name, home); 1207 } 1208 (void)copydotfiles(up->u_skeldir, up->u_uid, gid, home); 1209 } 1210 } 1211 if (strcmp(up->u_primgrp, "=uid") == 0 && 1212 getgrnam(login_name) == NULL && 1213 !creategid(login_name, gid, login_name)) { 1214 (void)close(ptmpfd); 1215 (void)pw_abort(); 1216 errx(EXIT_FAILURE, "Can't add user `%s': can't create gid %d ", 1217 login_name, gid); 1218 } 1219 if (up->u_groupc > 0 && 1220 !append_group(login_name, up->u_groupc, up->u_groupv)) { 1221 (void)close(ptmpfd); 1222 (void)pw_abort(); 1223 errx(EXIT_FAILURE, "Can't add user `%s': can't append " 1224 "to new groups", login_name); 1225 } 1226 (void)close(ptmpfd); 1227 #if PW_MKDB_ARGC == 2 1228 if (pw_mkdb(login_name, 0) < 0) 1229 #else 1230 if (pw_mkdb() < 0) 1231 #endif 1232 { 1233 (void)pw_abort(); 1234 errx(EXIT_FAILURE, "Can't add user `%s': pw_mkdb failed", 1235 login_name); 1236 } 1237 syslog(LOG_INFO, "New user added: name=%s, uid=%d, gid=%d, home=%s, " 1238 "shell=%s", login_name, up->u_uid, gid, home, up->u_shell); 1239 return 1; 1240 } 1241 1242 /* remove a user from the groups file */ 1243 static int 1244 rm_user_from_groups(char *login_name) 1245 { 1246 struct stat st; 1247 regmatch_t matchv[10]; 1248 regex_t r; 1249 FILE *from; 1250 FILE *to; 1251 char line[MaxEntryLen]; 1252 char buf[MaxEntryLen]; 1253 char f[MaxFileNameLen]; 1254 int fd; 1255 int cc; 1256 int sc; 1257 1258 (void)snprintf(line, sizeof(line), "(:|,)(%s)(,|$)", login_name); 1259 if ((sc = regcomp(&r, line, REG_EXTENDED|REG_NEWLINE)) != 0) { 1260 (void)regerror(sc, &r, buf, sizeof(buf)); 1261 warnx("Can't compile regular expression `%s' (%s)", line, 1262 buf); 1263 return 0; 1264 } 1265 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 1266 warn("Can't remove user `%s' from `%s': can't open `%s'", 1267 login_name, _PATH_GROUP, _PATH_GROUP); 1268 return 0; 1269 } 1270 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 1271 warn("Can't remove user `%s' from `%s': can't lock `%s'", 1272 login_name, _PATH_GROUP, _PATH_GROUP); 1273 return 0; 1274 } 1275 (void)fstat(fileno(from), &st); 1276 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 1277 if ((fd = mkstemp(f)) < 0) { 1278 warn("Can't remove user `%s' from `%s': mkstemp failed", 1279 login_name, _PATH_GROUP); 1280 (void)fclose(from); 1281 return 0; 1282 } 1283 if ((to = fdopen(fd, "w")) == NULL) { 1284 warn("Can't remove user `%s' from `%s': fdopen `%s' failed", 1285 login_name, _PATH_GROUP, f); 1286 (void)fclose(from); 1287 (void)close(fd); 1288 (void)unlink(f); 1289 return 0; 1290 } 1291 while (fgets(buf, sizeof(buf), from) != NULL) { 1292 cc = strlen(buf); 1293 if (regexec(&r, buf, 10, matchv, 0) == 0) { 1294 if (buf[(int)matchv[1].rm_so] == ',') { 1295 matchv[2].rm_so = matchv[1].rm_so; 1296 } else if (matchv[2].rm_eo != matchv[3].rm_eo) { 1297 matchv[2].rm_eo = matchv[3].rm_eo; 1298 } 1299 cc -= (int) matchv[2].rm_eo; 1300 sc = (int) matchv[2].rm_so; 1301 if (fwrite(buf, sizeof(char), (size_t)sc, to) != sc || 1302 fwrite(&buf[(int)matchv[2].rm_eo], sizeof(char), 1303 (size_t)cc, to) != cc) { 1304 warn("Can't remove user `%s' from `%s': " 1305 "short write to `%s'", login_name, 1306 _PATH_GROUP, f); 1307 (void)fclose(from); 1308 (void)close(fd); 1309 (void)unlink(f); 1310 return 0; 1311 } 1312 } else if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 1313 warn("Can't remove user `%s' from `%s': " 1314 "short write to `%s'", login_name, _PATH_GROUP, f); 1315 (void)fclose(from); 1316 (void)close(fd); 1317 (void)unlink(f); 1318 return 0; 1319 } 1320 } 1321 (void)fclose(from); 1322 (void)fclose(to); 1323 if (rename(f, _PATH_GROUP) < 0) { 1324 warn("Can't remove user `%s' from `%s': " 1325 "can't rename `%s' to `%s'", 1326 login_name, _PATH_GROUP, f, _PATH_GROUP); 1327 (void)unlink(f); 1328 return 0; 1329 } 1330 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 1331 return 1; 1332 } 1333 1334 /* check that the user or group is local, not from YP/NIS */ 1335 static int 1336 is_local(char *name, const char *file) 1337 { 1338 FILE *fp; 1339 char buf[MaxEntryLen]; 1340 size_t len; 1341 int ret; 1342 1343 if ((fp = fopen(file, "r")) == NULL) { 1344 err(EXIT_FAILURE, "Can't open `%s'", file); 1345 } 1346 len = strlen(name); 1347 for (ret = 0 ; fgets(buf, sizeof(buf), fp) != NULL ; ) { 1348 if (strncmp(buf, name, len) == 0 && buf[len] == ':') { 1349 ret = 1; 1350 break; 1351 } 1352 } 1353 (void)fclose(fp); 1354 return ret; 1355 } 1356 1357 /* modify a user */ 1358 static int 1359 moduser(char *login_name, char *newlogin, user_t *up, int allow_samba) 1360 { 1361 struct passwd *pwp; 1362 struct group *grp; 1363 const char *homedir; 1364 char *locked_pwd; 1365 size_t colonc; 1366 size_t loginc; 1367 size_t len; 1368 size_t cc; 1369 FILE *master; 1370 char newdir[MaxFileNameLen]; 1371 char buf[MaxEntryLen]; 1372 char *colon; 1373 int masterfd; 1374 int ptmpfd; 1375 int error; 1376 1377 if (!valid_login(newlogin, allow_samba)) { 1378 errx(EXIT_FAILURE, "Can't modify user `%s': invalid login name", 1379 login_name); 1380 } 1381 if ((pwp = getpwnam(login_name)) == NULL) { 1382 errx(EXIT_FAILURE, "Can't modify user `%s': no such user", 1383 login_name); 1384 } 1385 if (!is_local(login_name, _PATH_MASTERPASSWD)) { 1386 errx(EXIT_FAILURE, "Can't modify user `%s': must be a local user", 1387 login_name); 1388 } 1389 /* keep dir name in case we need it for '-m' */ 1390 homedir = pwp->pw_dir; 1391 1392 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1393 err(EXIT_FAILURE, "Can't modify user `%s': can't open `%s'", 1394 login_name, _PATH_MASTERPASSWD); 1395 } 1396 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1397 err(EXIT_FAILURE, "Can't modify user `%s': can't lock `%s'", 1398 login_name, _PATH_MASTERPASSWD); 1399 } 1400 pw_init(); 1401 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1402 int serrno = errno; 1403 (void)close(masterfd); 1404 errno = serrno; 1405 err(EXIT_FAILURE, "Can't modify user `%s': " 1406 "can't obtain pw_lock", login_name); 1407 } 1408 if ((master = fdopen(masterfd, "r")) == NULL) { 1409 int serrno = errno; 1410 (void)close(masterfd); 1411 (void)close(ptmpfd); 1412 (void)pw_abort(); 1413 errno = serrno; 1414 err(EXIT_FAILURE, "Can't modify user `%s': " 1415 "fdopen fd for %s", login_name, _PATH_MASTERPASSWD); 1416 } 1417 if (up != NULL) { 1418 if (up->u_flags & F_USERNAME) { 1419 /* 1420 * If changing name, 1421 * check new name isn't already in use 1422 */ 1423 if (strcmp(login_name, newlogin) != 0 && 1424 getpwnam(newlogin) != NULL) { 1425 (void)close(ptmpfd); 1426 (void)pw_abort(); 1427 errx(EXIT_FAILURE, "Can't modify user `%s': " 1428 "`%s' is already a user", login_name, 1429 newlogin); 1430 } 1431 pwp->pw_name = newlogin; 1432 1433 /* 1434 * Provide a new directory name in case the 1435 * home directory is to be moved. 1436 */ 1437 if (up->u_flags & F_MKDIR) { 1438 (void)snprintf(newdir, sizeof(newdir), "%s/%s", 1439 up->u_basedir, newlogin); 1440 pwp->pw_dir = newdir; 1441 } 1442 } 1443 if (up->u_flags & F_PASSWORD) { 1444 if (up->u_password != NULL) { 1445 if (!valid_password_length(up->u_password)) { 1446 (void)close(ptmpfd); 1447 (void)pw_abort(); 1448 errx(EXIT_FAILURE, 1449 "Can't modify user `%s': " 1450 "invalid password: `%s'", 1451 login_name, up->u_password); 1452 } 1453 if ((locked_pwd = 1454 strstr(pwp->pw_passwd, LOCKED)) != NULL) { 1455 /* 1456 * account is locked - keep it locked 1457 * and just change the password. 1458 */ 1459 if (asprintf(&locked_pwd, "%s%s", 1460 LOCKED, up->u_password) == -1) { 1461 (void)close(ptmpfd); 1462 (void)pw_abort(); 1463 err(EXIT_FAILURE, 1464 "Can't modify user `%s': " 1465 "asprintf failed", 1466 login_name); 1467 } 1468 pwp->pw_passwd = locked_pwd; 1469 } else { 1470 pwp->pw_passwd = up->u_password; 1471 } 1472 } 1473 } 1474 1475 /* check whether we should lock the account. */ 1476 if (up->u_locked == LOCK) { 1477 /* check to see account if already locked. */ 1478 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1479 != NULL) { 1480 warnx("Account is already locked"); 1481 } else { 1482 if (asprintf(&locked_pwd, "%s%s", LOCKED, 1483 pwp->pw_passwd) == -1) { 1484 (void)close(ptmpfd); 1485 (void)pw_abort(); 1486 err(EXIT_FAILURE, 1487 "Can't modify user `%s': " 1488 "asprintf failed", login_name); 1489 } 1490 pwp->pw_passwd = locked_pwd; 1491 } 1492 } else if (up->u_locked == UNLOCK) { 1493 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1494 == NULL) { 1495 warnx("Can't modify user `%s': " 1496 "account is not locked", login_name); 1497 } else { 1498 pwp->pw_passwd = locked_pwd + strlen(LOCKED); 1499 } 1500 } 1501 1502 if (up->u_flags & F_UID) { 1503 /* check uid isn't already allocated */ 1504 if (!(up->u_flags & F_DUPUID) && 1505 getpwuid((uid_t)(up->u_uid)) != NULL) { 1506 (void)close(ptmpfd); 1507 (void)pw_abort(); 1508 errx(EXIT_FAILURE, "Can't modify user `%s': " 1509 "uid `%d' is already in use", login_name, 1510 up->u_uid); 1511 } 1512 pwp->pw_uid = up->u_uid; 1513 } 1514 if (up->u_flags & F_GROUP) { 1515 /* if -g=uid was specified, check gid is unused */ 1516 if (strcmp(up->u_primgrp, "=uid") == 0) { 1517 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1518 (void)close(ptmpfd); 1519 (void)pw_abort(); 1520 errx(EXIT_FAILURE, 1521 "Can't modify user `%s': " 1522 "gid %d is already in use", 1523 login_name, up->u_uid); 1524 } 1525 pwp->pw_gid = up->u_uid; 1526 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1527 pwp->pw_gid = grp->gr_gid; 1528 } else if (is_number(up->u_primgrp) && 1529 (grp = getgrgid( 1530 (gid_t)atoi(up->u_primgrp))) != NULL) { 1531 pwp->pw_gid = grp->gr_gid; 1532 } else { 1533 (void)close(ptmpfd); 1534 (void)pw_abort(); 1535 errx(EXIT_FAILURE, "Can't modify user `%s': " 1536 "group %s not found", login_name, 1537 up->u_primgrp); 1538 } 1539 } 1540 if (up->u_flags & F_INACTIVE) { 1541 if (!scantime(&pwp->pw_change, up->u_inactive)) { 1542 warnx("Warning: inactive time `%s' invalid, " 1543 "password expiry off", 1544 up->u_inactive); 1545 } 1546 } 1547 if (up->u_flags & F_EXPIRE) { 1548 if (!scantime(&pwp->pw_expire, up->u_expire) || 1549 pwp->pw_expire == -1) { 1550 warnx("Warning: expire time `%s' invalid, " 1551 "account expiry off", 1552 up->u_expire); 1553 pwp->pw_expire = 0; 1554 } 1555 } 1556 if (up->u_flags & F_COMMENT) { 1557 pwp->pw_gecos = up->u_comment; 1558 } 1559 if (up->u_flags & F_HOMEDIR) { 1560 pwp->pw_dir = up->u_home; 1561 } 1562 if (up->u_flags & F_SHELL) { 1563 #ifdef EXTENSIONS 1564 if (!valid_shell(up->u_shell)) { 1565 (void)close(ptmpfd); 1566 (void)pw_abort(); 1567 errx(EXIT_FAILURE, "Can't modify user `%s': " 1568 "shell `%s' is not valid", login_name, up->u_shell); 1569 } 1570 pwp->pw_shell = up->u_shell; 1571 #else 1572 pwp->pw_shell = up->u_shell; 1573 #endif 1574 } 1575 #ifdef EXTENSIONS 1576 if (up->u_flags & F_CLASS) { 1577 if (!valid_class(up->u_class)) { 1578 (void)close(ptmpfd); 1579 (void)pw_abort(); 1580 errx(EXIT_FAILURE, "Can't modify user `%s': " 1581 "no such login class `%s'", login_name, 1582 up->u_class); 1583 } 1584 pwp->pw_class = up->u_class; 1585 } 1586 #endif 1587 } 1588 loginc = strlen(login_name); 1589 while (fgets(buf, sizeof(buf), master) != NULL) { 1590 if ((colon = strchr(buf, ':')) == NULL) { 1591 warnx("Malformed entry `%s'. Skipping", buf); 1592 continue; 1593 } 1594 colonc = (size_t)(colon - buf); 1595 if (strncmp(login_name, buf, loginc) == 0 && loginc == colonc) { 1596 if (up != NULL) { 1597 len = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:" 1598 #ifdef EXTENSIONS 1599 "%s" 1600 #endif 1601 ":%ld:%ld:%s:%s:%s\n", 1602 newlogin, 1603 pwp->pw_passwd, 1604 pwp->pw_uid, 1605 pwp->pw_gid, 1606 #ifdef EXTENSIONS 1607 pwp->pw_class, 1608 #endif 1609 (long)pwp->pw_change, 1610 (long)pwp->pw_expire, 1611 pwp->pw_gecos, 1612 pwp->pw_dir, 1613 pwp->pw_shell); 1614 if (write(ptmpfd, buf, len) != len) { 1615 int serrno = errno; 1616 (void)close(ptmpfd); 1617 (void)pw_abort(); 1618 errno = serrno; 1619 err(EXIT_FAILURE, "Can't modify user " 1620 "`%s': write", login_name); 1621 } 1622 } 1623 } else { 1624 len = strlen(buf); 1625 if ((cc = write(ptmpfd, buf, len)) != len) { 1626 int serrno = errno; 1627 (void)close(masterfd); 1628 (void)close(ptmpfd); 1629 (void)pw_abort(); 1630 errno = serrno; 1631 err(EXIT_FAILURE, "Can't modify `%s': " 1632 "write", login_name); 1633 } 1634 } 1635 } 1636 if (up != NULL) { 1637 if ((up->u_flags & F_MKDIR) && 1638 asystem("%s %s %s", MV, homedir, pwp->pw_dir) != 0) { 1639 (void)close(ptmpfd); 1640 (void)pw_abort(); 1641 errx(EXIT_FAILURE, "Can't modify user `%s': " 1642 "can't move `%s' to `%s'", 1643 login_name, homedir, pwp->pw_dir); 1644 } 1645 if (up->u_groupc > 0 && 1646 !append_group(newlogin, up->u_groupc, up->u_groupv)) { 1647 (void)close(ptmpfd); 1648 (void)pw_abort(); 1649 errx(EXIT_FAILURE, "Can't modify user `%s': " 1650 "can't append `%s' to new groups", 1651 login_name, newlogin); 1652 } 1653 } 1654 (void)close(ptmpfd); 1655 #if PW_MKDB_ARGC == 2 1656 if (up != NULL && strcmp(login_name, newlogin) == 0) { 1657 error = pw_mkdb(login_name, 0); 1658 } else { 1659 error = pw_mkdb(NULL, 0); 1660 } 1661 #else 1662 error = pw_mkdb(); 1663 #endif 1664 if (error < 0) { 1665 (void)pw_abort(); 1666 errx(EXIT_FAILURE, "Can't modify user `%s': pw_mkdb failed", 1667 login_name); 1668 } 1669 if (up == NULL) { 1670 syslog(LOG_INFO, "User removed: name=%s", login_name); 1671 } else if (strcmp(login_name, newlogin) == 0) { 1672 syslog(LOG_INFO, "User information modified: name=%s, uid=%d, " 1673 "gid=%d, home=%s, shell=%s", 1674 login_name, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, 1675 pwp->pw_shell); 1676 } else { 1677 syslog(LOG_INFO, "User information modified: name=%s, " 1678 "new name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1679 login_name, newlogin, pwp->pw_uid, pwp->pw_gid, 1680 pwp->pw_dir, pwp->pw_shell); 1681 } 1682 return 1; 1683 } 1684 1685 #ifdef EXTENSIONS 1686 /* see if we can find out the user struct */ 1687 static struct passwd * 1688 find_user_info(const char *name) 1689 { 1690 struct passwd *pwp; 1691 1692 if ((pwp = getpwnam(name)) != NULL) { 1693 return pwp; 1694 } 1695 if (is_number(name) && (pwp = getpwuid((uid_t)atoi(name))) != NULL) { 1696 return pwp; 1697 } 1698 return NULL; 1699 } 1700 #endif 1701 1702 /* see if we can find out the group struct */ 1703 static struct group * 1704 find_group_info(const char *name) 1705 { 1706 struct group *grp; 1707 1708 if ((grp = getgrnam(name)) != NULL) { 1709 return grp; 1710 } 1711 if (is_number(name) && (grp = getgrgid((gid_t)atoi(name))) != NULL) { 1712 return grp; 1713 } 1714 return NULL; 1715 } 1716 1717 /* print out usage message, and then exit */ 1718 void 1719 usermgmt_usage(const char *prog) 1720 { 1721 if (strcmp(prog, "useradd") == 0) { 1722 (void)fprintf(stderr, "usage: %s -D [-F] [-b base-dir] " 1723 "[-e expiry-time] [-f inactive-time]\n" 1724 "\t[-g gid | name | =uid] [-k skel-dir] [-L login-class]\n" 1725 "\t[-r lowuid..highuid] [-s shell]\n", prog); 1726 (void)fprintf(stderr, "usage: %s [-moSv] [-b base-dir] " 1727 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1728 "\t[-f inactive-time] [-G secondary-group] " 1729 "[-g gid | name | =uid]\n" 1730 "\t[-k skeletondir] [-L login-class] [-p password]" 1731 "[-r lowuid..highuid]\n" 1732 "\t[-s shell] [-u uid] user\n", 1733 prog); 1734 } else if (strcmp(prog, "usermod") == 0) { 1735 (void)fprintf(stderr, "usage: %s [-FmoSv] [-C yes/no] " 1736 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1737 "\t[-f inactive] [-G secondary-group] " 1738 "[-g gid | name | =uid]\n" 1739 "\t[-L login-class] [-l new-login] [-p password] " 1740 "[-s shell] [-u uid]\n" 1741 "\tuser\n", prog); 1742 } else if (strcmp(prog, "userdel") == 0) { 1743 (void)fprintf(stderr, "usage: %s -D [-p preserve-value]\n", prog); 1744 (void)fprintf(stderr, 1745 "usage: %s [-rSv] [-p preserve-value] user\n", prog); 1746 #ifdef EXTENSIONS 1747 } else if (strcmp(prog, "userinfo") == 0) { 1748 (void)fprintf(stderr, "usage: %s [-ev] user\n", prog); 1749 #endif 1750 } else if (strcmp(prog, "groupadd") == 0) { 1751 (void)fprintf(stderr, "usage: %s [-ov] [-g gid]" 1752 " [-r lowgid..highgid] group\n", prog); 1753 } else if (strcmp(prog, "groupdel") == 0) { 1754 (void)fprintf(stderr, "usage: %s [-v] group\n", prog); 1755 } else if (strcmp(prog, "groupmod") == 0) { 1756 (void)fprintf(stderr, 1757 "usage: %s [-ov] [-g gid] [-n newname] group\n", prog); 1758 } else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) { 1759 (void)fprintf(stderr, 1760 "usage: %s ( add | del | mod | info ) ...\n", prog); 1761 #ifdef EXTENSIONS 1762 } else if (strcmp(prog, "groupinfo") == 0) { 1763 (void)fprintf(stderr, "usage: %s [-ev] group\n", prog); 1764 #endif 1765 } 1766 exit(EXIT_FAILURE); 1767 /* NOTREACHED */ 1768 } 1769 1770 #ifdef EXTENSIONS 1771 #define ADD_OPT_EXTENSIONS "p:r:vL:S" 1772 #else 1773 #define ADD_OPT_EXTENSIONS 1774 #endif 1775 1776 int 1777 useradd(int argc, char **argv) 1778 { 1779 user_t u; 1780 int defaultfield; 1781 int bigD; 1782 int c; 1783 #ifdef EXTENSIONS 1784 int i; 1785 #endif 1786 1787 (void)memset(&u, 0, sizeof(u)); 1788 read_defaults(&u); 1789 u.u_uid = -1; 1790 defaultfield = bigD = 0; 1791 while ((c = getopt(argc, argv, "DFG:b:c:d:e:f:g:k:mou:s:" 1792 ADD_OPT_EXTENSIONS)) != -1) { 1793 switch(c) { 1794 case 'D': 1795 bigD = 1; 1796 break; 1797 case 'F': 1798 /* 1799 * Setting -1 will force the new user to 1800 * change their password as soon as they 1801 * next log in - passwd(5). 1802 */ 1803 defaultfield = 1; 1804 memsave(&u.u_inactive, "-1", strlen("-1")); 1805 break; 1806 case 'G': 1807 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1808 u.u_groupc < NGROUPS_MAX) { 1809 if (u.u_groupv[u.u_groupc][0] != 0) { 1810 u.u_groupc++; 1811 } 1812 } 1813 if (optarg != NULL) { 1814 warnx("Truncated list of secondary groups " 1815 "to %d entries", NGROUPS_MAX); 1816 } 1817 break; 1818 #ifdef EXTENSIONS 1819 case 'S': 1820 u.u_allow_samba = 1; 1821 break; 1822 #endif 1823 case 'b': 1824 defaultfield = 1; 1825 memsave(&u.u_basedir, optarg, strlen(optarg)); 1826 break; 1827 case 'c': 1828 memsave(&u.u_comment, optarg, strlen(optarg)); 1829 break; 1830 case 'd': 1831 memsave(&u.u_home, optarg, strlen(optarg)); 1832 u.u_flags |= F_HOMEDIR; 1833 break; 1834 case 'e': 1835 defaultfield = 1; 1836 memsave(&u.u_expire, optarg, strlen(optarg)); 1837 break; 1838 case 'f': 1839 defaultfield = 1; 1840 memsave(&u.u_inactive, optarg, strlen(optarg)); 1841 break; 1842 case 'g': 1843 defaultfield = 1; 1844 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1845 break; 1846 case 'k': 1847 defaultfield = 1; 1848 memsave(&u.u_skeldir, optarg, strlen(optarg)); 1849 break; 1850 #ifdef EXTENSIONS 1851 case 'L': 1852 defaultfield = 1; 1853 memsave(&u.u_class, optarg, strlen(optarg)); 1854 break; 1855 #endif 1856 case 'm': 1857 u.u_flags |= F_MKDIR; 1858 break; 1859 case 'o': 1860 u.u_flags |= F_DUPUID; 1861 break; 1862 #ifdef EXTENSIONS 1863 case 'p': 1864 memsave(&u.u_password, optarg, strlen(optarg)); 1865 break; 1866 #endif 1867 #ifdef EXTENSIONS 1868 case 'r': 1869 defaultfield = 1; 1870 (void)save_range(&u, optarg); 1871 break; 1872 #endif 1873 case 's': 1874 u.u_flags |= F_SHELL; 1875 defaultfield = 1; 1876 memsave(&u.u_shell, optarg, strlen(optarg)); 1877 break; 1878 case 'u': 1879 u.u_uid = check_numeric(optarg, "uid"); 1880 break; 1881 #ifdef EXTENSIONS 1882 case 'v': 1883 verbose = 1; 1884 break; 1885 #endif 1886 default: 1887 usermgmt_usage("useradd"); 1888 /* NOTREACHED */ 1889 } 1890 } 1891 if (bigD) { 1892 if (defaultfield) { 1893 checkeuid(); 1894 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1895 } 1896 (void)printf("group\t\t%s\n", u.u_primgrp); 1897 (void)printf("base_dir\t%s\n", u.u_basedir); 1898 (void)printf("skel_dir\t%s\n", u.u_skeldir); 1899 (void)printf("shell\t\t%s\n", u.u_shell); 1900 #ifdef EXTENSIONS 1901 (void)printf("class\t\t%s\n", u.u_class); 1902 #endif 1903 (void)printf("inactive\t%s\n", (u.u_inactive == NULL) ? 1904 UNSET_INACTIVE : u.u_inactive); 1905 (void)printf("expire\t\t%s\n", (u.u_expire == NULL) ? 1906 UNSET_EXPIRY : u.u_expire); 1907 #ifdef EXTENSIONS 1908 for (i = 0 ; i < u.u_rc ; i++) { 1909 (void)printf("range\t\t%d..%d\n", 1910 u.u_rv[i].r_from, u.u_rv[i].r_to); 1911 } 1912 #endif 1913 return EXIT_SUCCESS; 1914 } 1915 argc -= optind; 1916 argv += optind; 1917 if (argc != 1) { 1918 usermgmt_usage("useradd"); 1919 } 1920 checkeuid(); 1921 openlog("useradd", LOG_PID, LOG_USER); 1922 return adduser(*argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1923 } 1924 1925 #ifdef EXTENSIONS 1926 #define MOD_OPT_EXTENSIONS "p:vL:S" 1927 #else 1928 #define MOD_OPT_EXTENSIONS 1929 #endif 1930 1931 int 1932 usermod(int argc, char **argv) 1933 { 1934 user_t u; 1935 char newuser[MaxUserNameLen + 1]; 1936 int c, have_new_user; 1937 1938 (void)memset(&u, 0, sizeof(u)); 1939 (void)memset(newuser, 0, sizeof(newuser)); 1940 read_defaults(&u); 1941 have_new_user = 0; 1942 u.u_locked = -1; 1943 while ((c = getopt(argc, argv, "C:FG:c:d:e:f:g:l:mos:u:" 1944 MOD_OPT_EXTENSIONS)) != -1) { 1945 switch(c) { 1946 case 'G': 1947 while ((u.u_groupv[u.u_groupc] = 1948 strsep(&optarg, ",")) != NULL && 1949 u.u_groupc < NGROUPS_MAX) { 1950 if (u.u_groupv[u.u_groupc][0] != 0) { 1951 u.u_groupc++; 1952 } 1953 } 1954 if (optarg != NULL) { 1955 warnx("Truncated list of secondary groups " 1956 "to %d entries", NGROUPS_MAX); 1957 } 1958 u.u_flags |= F_SECGROUP; 1959 break; 1960 #ifdef EXTENSIONS 1961 case 'S': 1962 u.u_allow_samba = 1; 1963 break; 1964 #endif 1965 case 'c': 1966 memsave(&u.u_comment, optarg, strlen(optarg)); 1967 u.u_flags |= F_COMMENT; 1968 break; 1969 case 'C': 1970 if (strcasecmp(optarg, "yes") == 0) { 1971 u.u_locked = LOCK; 1972 } else if (strcasecmp(optarg, "no") == 0) { 1973 u.u_locked = UNLOCK; 1974 } else { 1975 /* No idea. */ 1976 errx(EXIT_FAILURE, 1977 "Please type 'yes' or 'no'"); 1978 } 1979 break; 1980 case 'F': 1981 memsave(&u.u_inactive, "-1", strlen("-1")); 1982 u.u_flags |= F_INACTIVE; 1983 break; 1984 case 'd': 1985 memsave(&u.u_home, optarg, strlen(optarg)); 1986 u.u_flags |= F_HOMEDIR; 1987 break; 1988 case 'e': 1989 memsave(&u.u_expire, optarg, strlen(optarg)); 1990 u.u_flags |= F_EXPIRE; 1991 break; 1992 case 'f': 1993 memsave(&u.u_inactive, optarg, strlen(optarg)); 1994 u.u_flags |= F_INACTIVE; 1995 break; 1996 case 'g': 1997 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1998 u.u_flags |= F_GROUP; 1999 break; 2000 case 'l': 2001 (void)strlcpy(newuser, optarg, sizeof(newuser)); 2002 have_new_user = 1; 2003 u.u_flags |= F_USERNAME; 2004 break; 2005 #ifdef EXTENSIONS 2006 case 'L': 2007 memsave(&u.u_class, optarg, strlen(optarg)); 2008 u.u_flags |= F_CLASS; 2009 break; 2010 #endif 2011 case 'm': 2012 u.u_flags |= F_MKDIR; 2013 break; 2014 case 'o': 2015 u.u_flags |= F_DUPUID; 2016 break; 2017 #ifdef EXTENSIONS 2018 case 'p': 2019 memsave(&u.u_password, optarg, strlen(optarg)); 2020 u.u_flags |= F_PASSWORD; 2021 break; 2022 #endif 2023 case 's': 2024 memsave(&u.u_shell, optarg, strlen(optarg)); 2025 u.u_flags |= F_SHELL; 2026 break; 2027 case 'u': 2028 u.u_uid = check_numeric(optarg, "uid"); 2029 u.u_flags |= F_UID; 2030 break; 2031 #ifdef EXTENSIONS 2032 case 'v': 2033 verbose = 1; 2034 break; 2035 #endif 2036 default: 2037 usermgmt_usage("usermod"); 2038 /* NOTREACHED */ 2039 } 2040 } 2041 if ((u.u_flags & F_MKDIR) && !(u.u_flags & F_HOMEDIR) && 2042 !(u.u_flags & F_USERNAME)) { 2043 warnx("Option 'm' useless without 'd' or 'l' -- ignored"); 2044 u.u_flags &= ~F_MKDIR; 2045 } 2046 argc -= optind; 2047 argv += optind; 2048 if (argc != 1) { 2049 usermgmt_usage("usermod"); 2050 } 2051 checkeuid(); 2052 openlog("usermod", LOG_PID, LOG_USER); 2053 return moduser(*argv, (have_new_user) ? newuser : *argv, &u, 2054 u.u_allow_samba) ? EXIT_SUCCESS : EXIT_FAILURE; 2055 } 2056 2057 #ifdef EXTENSIONS 2058 #define DEL_OPT_EXTENSIONS "Dp:vS" 2059 #else 2060 #define DEL_OPT_EXTENSIONS 2061 #endif 2062 2063 int 2064 userdel(int argc, char **argv) 2065 { 2066 struct passwd *pwp; 2067 user_t u; 2068 char password[PasswordLength + 1]; 2069 int defaultfield; 2070 int rmhome; 2071 int bigD; 2072 int c; 2073 2074 (void)memset(&u, 0, sizeof(u)); 2075 read_defaults(&u); 2076 defaultfield = bigD = rmhome = 0; 2077 while ((c = getopt(argc, argv, "r" DEL_OPT_EXTENSIONS)) != -1) { 2078 switch(c) { 2079 #ifdef EXTENSIONS 2080 case 'D': 2081 bigD = 1; 2082 break; 2083 #endif 2084 #ifdef EXTENSIONS 2085 case 'S': 2086 u.u_allow_samba = 1; 2087 break; 2088 #endif 2089 #ifdef EXTENSIONS 2090 case 'p': 2091 defaultfield = 1; 2092 u.u_preserve = (strcmp(optarg, "true") == 0) ? 1 : 2093 (strcmp(optarg, "yes") == 0) ? 1 : 2094 atoi(optarg); 2095 break; 2096 #endif 2097 case 'r': 2098 rmhome = 1; 2099 break; 2100 #ifdef EXTENSIONS 2101 case 'v': 2102 verbose = 1; 2103 break; 2104 #endif 2105 default: 2106 usermgmt_usage("userdel"); 2107 /* NOTREACHED */ 2108 } 2109 } 2110 #ifdef EXTENSIONS 2111 if (bigD) { 2112 if (defaultfield) { 2113 checkeuid(); 2114 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 2115 } 2116 (void)printf("preserve\t%s\n", (u.u_preserve) ? "true" : 2117 "false"); 2118 return EXIT_SUCCESS; 2119 } 2120 #endif 2121 argc -= optind; 2122 argv += optind; 2123 if (argc != 1) { 2124 usermgmt_usage("userdel"); 2125 } 2126 checkeuid(); 2127 if ((pwp = getpwnam(*argv)) == NULL) { 2128 warnx("No such user `%s'", *argv); 2129 return EXIT_FAILURE; 2130 } 2131 if (rmhome) { 2132 (void)removehomedir(pwp); 2133 } 2134 if (u.u_preserve) { 2135 u.u_flags |= F_SHELL; 2136 memsave(&u.u_shell, NOLOGIN, strlen(NOLOGIN)); 2137 (void)memset(password, '*', DES_Len); 2138 password[DES_Len] = 0; 2139 memsave(&u.u_password, password, strlen(password)); 2140 u.u_flags |= F_PASSWORD; 2141 openlog("userdel", LOG_PID, LOG_USER); 2142 return moduser(*argv, *argv, &u, u.u_allow_samba) ? 2143 EXIT_SUCCESS : EXIT_FAILURE; 2144 } 2145 if (!rm_user_from_groups(*argv)) { 2146 return 0; 2147 } 2148 openlog("userdel", LOG_PID, LOG_USER); 2149 return moduser(*argv, *argv, NULL, u.u_allow_samba) ? 2150 EXIT_SUCCESS : EXIT_FAILURE; 2151 } 2152 2153 #ifdef EXTENSIONS 2154 #define GROUP_ADD_OPT_EXTENSIONS "r:v" 2155 #else 2156 #define GROUP_ADD_OPT_EXTENSIONS 2157 #endif 2158 2159 /* add a group */ 2160 int 2161 groupadd(int argc, char **argv) 2162 { 2163 int dupgid; 2164 int gid; 2165 int c; 2166 int lowgid; 2167 int highgid; 2168 2169 gid = -1; 2170 dupgid = 0; 2171 lowgid = LowGid; 2172 highgid = HighGid; 2173 while ((c = getopt(argc, argv, "g:o" GROUP_ADD_OPT_EXTENSIONS)) != -1) { 2174 switch(c) { 2175 case 'g': 2176 gid = check_numeric(optarg, "gid"); 2177 break; 2178 case 'o': 2179 dupgid = 1; 2180 break; 2181 #ifdef EXTENSIONS 2182 case 'r': 2183 if (sscanf(optarg, "%d..%d", &lowgid, &highgid) != 2) { 2184 errx(EXIT_FAILURE, "Bad range `%s'", optarg); 2185 } 2186 break; 2187 case 'v': 2188 verbose = 1; 2189 break; 2190 #endif 2191 default: 2192 usermgmt_usage("groupadd"); 2193 /* NOTREACHED */ 2194 } 2195 } 2196 argc -= optind; 2197 argv += optind; 2198 if (argc != 1) { 2199 usermgmt_usage("groupadd"); 2200 } 2201 checkeuid(); 2202 if (gid < 0 && !getnextgid(&gid, lowgid, highgid)) { 2203 err(EXIT_FAILURE, "Can't add group: can't get next gid"); 2204 } 2205 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 2206 errx(EXIT_FAILURE, "Can't add group: gid %d is a duplicate", 2207 gid); 2208 } 2209 if (!valid_group(*argv)) { 2210 warnx("Invalid group name `%s'", *argv); 2211 } 2212 openlog("groupadd", LOG_PID, LOG_USER); 2213 if (!creategid(*argv, gid, "")) 2214 exit(EXIT_FAILURE); 2215 2216 return EXIT_SUCCESS; 2217 } 2218 2219 #ifdef EXTENSIONS 2220 #define GROUP_DEL_OPT_EXTENSIONS "v" 2221 #else 2222 #define GROUP_DEL_OPT_EXTENSIONS 2223 #endif 2224 2225 /* remove a group */ 2226 int 2227 groupdel(int argc, char **argv) 2228 { 2229 int c; 2230 2231 while ((c = getopt(argc, argv, "" GROUP_DEL_OPT_EXTENSIONS)) != -1) { 2232 switch(c) { 2233 #ifdef EXTENSIONS 2234 case 'v': 2235 verbose = 1; 2236 break; 2237 #endif 2238 default: 2239 usermgmt_usage("groupdel"); 2240 /* NOTREACHED */ 2241 } 2242 } 2243 argc -= optind; 2244 argv += optind; 2245 if (argc != 1) { 2246 usermgmt_usage("groupdel"); 2247 } 2248 if (getgrnam(*argv) == NULL) { 2249 errx(EXIT_FAILURE, "No such group `%s'", *argv); 2250 } 2251 checkeuid(); 2252 openlog("groupdel", LOG_PID, LOG_USER); 2253 if (!modify_gid(*argv, NULL)) 2254 exit(EXIT_FAILURE); 2255 2256 return EXIT_SUCCESS; 2257 } 2258 2259 #ifdef EXTENSIONS 2260 #define GROUP_MOD_OPT_EXTENSIONS "v" 2261 #else 2262 #define GROUP_MOD_OPT_EXTENSIONS 2263 #endif 2264 2265 /* modify a group */ 2266 int 2267 groupmod(int argc, char **argv) 2268 { 2269 struct group *grp; 2270 char buf[MaxEntryLen]; 2271 char *newname; 2272 char **cpp; 2273 int dupgid; 2274 int gid; 2275 int cc; 2276 int c; 2277 2278 gid = -1; 2279 dupgid = 0; 2280 newname = NULL; 2281 while ((c = getopt(argc, argv, "g:on:" GROUP_MOD_OPT_EXTENSIONS)) != -1) { 2282 switch(c) { 2283 case 'g': 2284 gid = check_numeric(optarg, "gid"); 2285 break; 2286 case 'o': 2287 dupgid = 1; 2288 break; 2289 case 'n': 2290 memsave(&newname, optarg, strlen(optarg)); 2291 break; 2292 #ifdef EXTENSIONS 2293 case 'v': 2294 verbose = 1; 2295 break; 2296 #endif 2297 default: 2298 usermgmt_usage("groupmod"); 2299 /* NOTREACHED */ 2300 } 2301 } 2302 argc -= optind; 2303 argv += optind; 2304 if (argc != 1) { 2305 usermgmt_usage("groupmod"); 2306 } 2307 checkeuid(); 2308 if (gid < 0 && newname == NULL) { 2309 errx(EXIT_FAILURE, "Nothing to change"); 2310 } 2311 if (dupgid && gid < 0) { 2312 errx(EXIT_FAILURE, "Duplicate which gid?"); 2313 } 2314 if ((grp = find_group_info(*argv)) == NULL) { 2315 errx(EXIT_FAILURE, "Can't find group `%s' to modify", *argv); 2316 } 2317 if (!is_local(*argv, _PATH_GROUP)) { 2318 errx(EXIT_FAILURE, "Group `%s' must be a local group", *argv); 2319 } 2320 if (newname != NULL && !valid_group(newname)) { 2321 warnx("Invalid group name `%s'", newname); 2322 } 2323 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:", 2324 (newname) ? newname : grp->gr_name, 2325 grp->gr_passwd, 2326 (gid < 0) ? grp->gr_gid : gid); 2327 for (cpp = grp->gr_mem ; *cpp && cc < sizeof(buf) ; cpp++) { 2328 cc += snprintf(&buf[cc], sizeof(buf) - cc, "%s%s", *cpp, 2329 (cpp[1] == NULL) ? "" : ","); 2330 } 2331 cc += snprintf(&buf[cc], sizeof(buf) - cc, "\n"); 2332 openlog("groupmod", LOG_PID, LOG_USER); 2333 if (!modify_gid(*argv, buf)) 2334 exit(EXIT_FAILURE); 2335 2336 return EXIT_SUCCESS; 2337 } 2338 2339 #ifdef EXTENSIONS 2340 /* display user information */ 2341 int 2342 userinfo(int argc, char **argv) 2343 { 2344 struct passwd *pwp; 2345 struct group *grp; 2346 char buf[MaxEntryLen]; 2347 char **cpp; 2348 int exists; 2349 int cc; 2350 int i; 2351 2352 exists = 0; 2353 while ((i = getopt(argc, argv, "ev")) != -1) { 2354 switch(i) { 2355 case 'e': 2356 exists = 1; 2357 break; 2358 case 'v': 2359 verbose = 1; 2360 break; 2361 default: 2362 usermgmt_usage("userinfo"); 2363 /* NOTREACHED */ 2364 } 2365 } 2366 argc -= optind; 2367 argv += optind; 2368 if (argc != 1) { 2369 usermgmt_usage("userinfo"); 2370 } 2371 pwp = find_user_info(*argv); 2372 if (exists) { 2373 exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE); 2374 } 2375 if (pwp == NULL) { 2376 errx(EXIT_FAILURE, "Can't find user `%s'", *argv); 2377 } 2378 (void)printf("login\t%s\n", pwp->pw_name); 2379 (void)printf("passwd\t%s\n", pwp->pw_passwd); 2380 (void)printf("uid\t%d\n", pwp->pw_uid); 2381 for (cc = 0 ; (grp = getgrent()) != NULL ; ) { 2382 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2383 if (strcmp(*cpp, *argv) == 0 && 2384 grp->gr_gid != pwp->pw_gid) { 2385 cc += snprintf(&buf[cc], sizeof(buf) - cc, 2386 "%s ", grp->gr_name); 2387 } 2388 } 2389 } 2390 if ((grp = getgrgid(pwp->pw_gid)) == NULL) { 2391 (void)printf("groups\t%d %s\n", pwp->pw_gid, buf); 2392 } else { 2393 (void)printf("groups\t%s %s\n", grp->gr_name, buf); 2394 } 2395 (void)printf("change\t%s", pwp->pw_change > 0 ? 2396 ctime(&pwp->pw_change) : pwp->pw_change == -1 ? 2397 "NEXT LOGIN\n" : "NEVER\n"); 2398 (void)printf("class\t%s\n", pwp->pw_class); 2399 (void)printf("gecos\t%s\n", pwp->pw_gecos); 2400 (void)printf("dir\t%s\n", pwp->pw_dir); 2401 (void)printf("shell\t%s\n", pwp->pw_shell); 2402 (void)printf("expire\t%s", pwp->pw_expire ? 2403 ctime(&pwp->pw_expire) : "NEVER\n"); 2404 return EXIT_SUCCESS; 2405 } 2406 #endif 2407 2408 #ifdef EXTENSIONS 2409 /* display user information */ 2410 int 2411 groupinfo(int argc, char **argv) 2412 { 2413 struct group *grp; 2414 char **cpp; 2415 int exists; 2416 int i; 2417 2418 exists = 0; 2419 while ((i = getopt(argc, argv, "ev")) != -1) { 2420 switch(i) { 2421 case 'e': 2422 exists = 1; 2423 break; 2424 case 'v': 2425 verbose = 1; 2426 break; 2427 default: 2428 usermgmt_usage("groupinfo"); 2429 /* NOTREACHED */ 2430 } 2431 } 2432 argc -= optind; 2433 argv += optind; 2434 if (argc != 1) { 2435 usermgmt_usage("groupinfo"); 2436 } 2437 grp = find_group_info(*argv); 2438 if (exists) { 2439 exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE); 2440 } 2441 if (grp == NULL) { 2442 errx(EXIT_FAILURE, "Can't find group `%s'", *argv); 2443 } 2444 (void)printf("name\t%s\n", grp->gr_name); 2445 (void)printf("passwd\t%s\n", grp->gr_passwd); 2446 (void)printf("gid\t%d\n", grp->gr_gid); 2447 (void)printf("members\t"); 2448 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2449 (void)printf("%s", *cpp); 2450 if (*(cpp + 1)) { 2451 (void) printf(", "); 2452 } 2453 } 2454 (void)fputc('\n', stdout); 2455 return EXIT_SUCCESS; 2456 } 2457 #endif 2458