1 /* $NetBSD: user.c,v 1.98 2005/11/25 08:00:18 agc 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 1.98 2005/11/25 08:00:18 agc 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 #endif 955 956 /* look for a valid time, return 0 if it was specified but bad */ 957 static int 958 scantime(time_t *tp, char *s) 959 { 960 struct tm tm; 961 char *ep; 962 long val; 963 964 *tp = 0; 965 if (s != NULL) { 966 (void)memset(&tm, 0, sizeof(tm)); 967 if (strptime(s, "%c", &tm) != NULL) { 968 *tp = mktime(&tm); 969 return (*tp == -1) ? 0 : 1; 970 } else if (strptime(s, "%B %d %Y", &tm) != NULL) { 971 *tp = mktime(&tm); 972 return (*tp == -1) ? 0 : 1; 973 } else { 974 errno = 0; 975 *tp = val = strtol(s, &ep, 10); 976 if (*ep != '\0' || *tp < -1 || errno == ERANGE) { 977 *tp = 0; 978 return 0; 979 } 980 if (*tp != val) { 981 return 0; 982 } 983 } 984 } 985 return 1; 986 } 987 988 /* add a user */ 989 static int 990 adduser(char *login_name, user_t *up) 991 { 992 struct group *grp; 993 struct stat st; 994 time_t expire; 995 time_t inactive; 996 char password[PasswordLength + 1]; 997 char home[MaxFileNameLen]; 998 char buf[MaxFileNameLen]; 999 int sync_uid_gid; 1000 int masterfd; 1001 int ptmpfd; 1002 int gid; 1003 int cc; 1004 int i; 1005 1006 if (!valid_login(login_name, up->u_allow_samba)) { 1007 errx(EXIT_FAILURE, "Can't add user `%s': invalid login name", login_name); 1008 } 1009 #ifdef EXTENSIONS 1010 if (!valid_class(up->u_class)) { 1011 errx(EXIT_FAILURE, "Can't add user `%s': no such login class `%s'", 1012 login_name, up->u_class); 1013 } 1014 #endif 1015 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1016 err(EXIT_FAILURE, "Can't add user `%s': can't open `%s'", 1017 login_name, _PATH_MASTERPASSWD); 1018 } 1019 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1020 err(EXIT_FAILURE, "Can't add user `%s': can't lock `%s'", 1021 login_name, _PATH_MASTERPASSWD); 1022 } 1023 pw_init(); 1024 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1025 int serrno = errno; 1026 (void)close(masterfd); 1027 errno = serrno; 1028 err(EXIT_FAILURE, "Can't add user `%s': can't obtain pw_lock", 1029 login_name); 1030 } 1031 while ((cc = read(masterfd, buf, sizeof(buf))) > 0) { 1032 if (write(ptmpfd, buf, (size_t)(cc)) != cc) { 1033 int serrno = errno; 1034 (void)close(masterfd); 1035 (void)close(ptmpfd); 1036 (void)pw_abort(); 1037 errno = serrno; 1038 err(EXIT_FAILURE, "Can't add user `%s': " 1039 "short write to /etc/ptmp", login_name); 1040 } 1041 } 1042 /* if no uid was specified, get next one in [low_uid..high_uid] range */ 1043 sync_uid_gid = (strcmp(up->u_primgrp, "=uid") == 0); 1044 if (up->u_uid == -1) { 1045 int got_id = 0; 1046 1047 /* 1048 * Look for a free UID in the command line ranges (if any). 1049 * These start after the ranges specified in the config file. 1050 */ 1051 for (i = up->u_defrc; !got_id && i < up->u_rc ; i++) { 1052 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1053 up->u_rv[i].r_from, up->u_rv[i].r_to); 1054 } 1055 /* 1056 * If there were no free UIDs in the command line ranges, 1057 * try the ranges from the config file (there will always 1058 * be at least one default). 1059 */ 1060 for (i = 0; !got_id && i < up->u_defrc; i++) { 1061 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1062 up->u_rv[i].r_from, up->u_rv[i].r_to); 1063 } 1064 if (!got_id) { 1065 (void)close(ptmpfd); 1066 (void)pw_abort(); 1067 errx(EXIT_FAILURE, "Can't add user `%s': " 1068 "can't get next uid for %d", login_name, 1069 up->u_uid); 1070 } 1071 } 1072 /* check uid isn't already allocated */ 1073 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1074 (void)close(ptmpfd); 1075 (void)pw_abort(); 1076 errx(EXIT_FAILURE, "Can't add user `%s': " 1077 "uid %d is already in use", login_name, up->u_uid); 1078 } 1079 /* if -g=uid was specified, check gid is unused */ 1080 if (sync_uid_gid) { 1081 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1082 (void)close(ptmpfd); 1083 (void)pw_abort(); 1084 errx(EXIT_FAILURE, "Can't add user `%s': " 1085 "gid %d is already in use", login_name, 1086 up->u_uid); 1087 } 1088 gid = up->u_uid; 1089 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1090 gid = grp->gr_gid; 1091 } else if (is_number(up->u_primgrp) && 1092 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1093 gid = grp->gr_gid; 1094 } else { 1095 (void)close(ptmpfd); 1096 (void)pw_abort(); 1097 errx(EXIT_FAILURE, "Can't add user `%s': group %s not found", 1098 login_name, up->u_primgrp); 1099 } 1100 /* check name isn't already in use */ 1101 if (!(up->u_flags & F_DUPUID) && getpwnam(login_name) != NULL) { 1102 (void)close(ptmpfd); 1103 (void)pw_abort(); 1104 errx(EXIT_FAILURE, "Can't add user `%s': " 1105 "`%s' is already a user", login_name, login_name); 1106 } 1107 if (up->u_flags & F_HOMEDIR) { 1108 (void)strlcpy(home, up->u_home, sizeof(home)); 1109 } else { 1110 /* if home directory hasn't been given, make it up */ 1111 (void)snprintf(home, sizeof(home), "%s/%s", up->u_basedir, 1112 login_name); 1113 } 1114 if (!scantime(&inactive, up->u_inactive)) { 1115 warnx("Warning: inactive time `%s' invalid, password expiry off", 1116 up->u_inactive); 1117 } 1118 if (!scantime(&expire, up->u_expire) || expire == -1) { 1119 warnx("Warning: expire time `%s' invalid, account expiry off", 1120 up->u_expire); 1121 expire = 0; /* Just in case. */ 1122 } 1123 if (lstat(home, &st) < 0 && !(up->u_flags & F_MKDIR)) { 1124 warnx("Warning: home directory `%s' doesn't exist, " 1125 "and -m was not specified", home); 1126 } 1127 password[sizeof(password) - 1] = '\0'; 1128 if (up->u_password != NULL && valid_password_length(up->u_password)) { 1129 (void)strlcpy(password, up->u_password, sizeof(password)); 1130 } else { 1131 (void)memset(password, '*', DES_Len); 1132 password[DES_Len] = 0; 1133 if (up->u_password != NULL) { 1134 warnx("Password `%s' is invalid: setting it to `%s'", 1135 up->u_password, password); 1136 } 1137 } 1138 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1139 login_name, 1140 password, 1141 up->u_uid, 1142 gid, 1143 #ifdef EXTENSIONS 1144 up->u_class, 1145 #else 1146 "", 1147 #endif 1148 (long) inactive, 1149 (long) expire, 1150 up->u_comment, 1151 home, 1152 up->u_shell); 1153 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1154 int serrno = errno; 1155 (void)close(ptmpfd); 1156 (void)pw_abort(); 1157 errno = serrno; 1158 err(EXIT_FAILURE, "Can't add user `%s': write failed", 1159 login_name); 1160 } 1161 if (up->u_flags & F_MKDIR) { 1162 if (lstat(home, &st) == 0) { 1163 (void)close(ptmpfd); 1164 (void)pw_abort(); 1165 errx(EXIT_FAILURE, 1166 "Can't add user `%s': home directory `%s' " 1167 "already exists", login_name, home); 1168 } else { 1169 if (asystem("%s -p %s", MKDIR, home) != 0) { 1170 (void)close(ptmpfd); 1171 (void)pw_abort(); 1172 errx(EXIT_FAILURE, "Can't add user `%s': " 1173 "can't mkdir `%s'", login_name, home); 1174 } 1175 (void)copydotfiles(up->u_skeldir, up->u_uid, gid, home); 1176 } 1177 } 1178 if (strcmp(up->u_primgrp, "=uid") == 0 && 1179 getgrnam(login_name) == NULL && 1180 !creategid(login_name, gid, login_name)) { 1181 (void)close(ptmpfd); 1182 (void)pw_abort(); 1183 errx(EXIT_FAILURE, "Can't add user `%s': can't create gid %d ", 1184 login_name, gid); 1185 } 1186 if (up->u_groupc > 0 && 1187 !append_group(login_name, up->u_groupc, up->u_groupv)) { 1188 (void)close(ptmpfd); 1189 (void)pw_abort(); 1190 errx(EXIT_FAILURE, "Can't add user `%s': can't append " 1191 "to new groups", login_name); 1192 } 1193 (void)close(ptmpfd); 1194 #if PW_MKDB_ARGC == 2 1195 if (pw_mkdb(login_name, 0) < 0) 1196 #else 1197 if (pw_mkdb() < 0) 1198 #endif 1199 { 1200 (void)pw_abort(); 1201 errx(EXIT_FAILURE, "Can't add user `%s': pw_mkdb failed", 1202 login_name); 1203 } 1204 syslog(LOG_INFO, "New user added: name=%s, uid=%d, gid=%d, home=%s, " 1205 "shell=%s", login_name, up->u_uid, gid, home, up->u_shell); 1206 return 1; 1207 } 1208 1209 /* remove a user from the groups file */ 1210 static int 1211 rm_user_from_groups(char *login_name) 1212 { 1213 struct stat st; 1214 regmatch_t matchv[10]; 1215 regex_t r; 1216 FILE *from; 1217 FILE *to; 1218 char line[MaxEntryLen]; 1219 char buf[MaxEntryLen]; 1220 char f[MaxFileNameLen]; 1221 int fd; 1222 int cc; 1223 int sc; 1224 1225 (void)snprintf(line, sizeof(line), "(:|,)(%s)(,|$)", login_name); 1226 if ((sc = regcomp(&r, line, REG_EXTENDED|REG_NEWLINE)) != 0) { 1227 (void)regerror(sc, &r, buf, sizeof(buf)); 1228 warnx("Can't compile regular expression `%s' (%s)", line, 1229 buf); 1230 return 0; 1231 } 1232 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 1233 warn("Can't remove user `%s' from `%s': can't open `%s'", 1234 login_name, _PATH_GROUP, _PATH_GROUP); 1235 return 0; 1236 } 1237 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 1238 warn("Can't remove user `%s' from `%s': can't lock `%s'", 1239 login_name, _PATH_GROUP, _PATH_GROUP); 1240 return 0; 1241 } 1242 (void)fstat(fileno(from), &st); 1243 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 1244 if ((fd = mkstemp(f)) < 0) { 1245 warn("Can't remove user `%s' from `%s': mkstemp failed", 1246 login_name, _PATH_GROUP); 1247 (void)fclose(from); 1248 return 0; 1249 } 1250 if ((to = fdopen(fd, "w")) == NULL) { 1251 warn("Can't remove user `%s' from `%s': fdopen `%s' failed", 1252 login_name, _PATH_GROUP, f); 1253 (void)fclose(from); 1254 (void)close(fd); 1255 (void)unlink(f); 1256 return 0; 1257 } 1258 while (fgets(buf, sizeof(buf), from) != NULL) { 1259 cc = strlen(buf); 1260 if (regexec(&r, buf, 10, matchv, 0) == 0) { 1261 if (buf[(int)matchv[1].rm_so] == ',') { 1262 matchv[2].rm_so = matchv[1].rm_so; 1263 } else if (matchv[2].rm_eo != matchv[3].rm_eo) { 1264 matchv[2].rm_eo = matchv[3].rm_eo; 1265 } 1266 cc -= (int) matchv[2].rm_eo; 1267 sc = (int) matchv[2].rm_so; 1268 if (fwrite(buf, sizeof(char), (size_t)sc, to) != sc || 1269 fwrite(&buf[(int)matchv[2].rm_eo], sizeof(char), 1270 (size_t)cc, to) != cc) { 1271 warn("Can't remove user `%s' from `%s': " 1272 "short write to `%s'", login_name, 1273 _PATH_GROUP, f); 1274 (void)fclose(from); 1275 (void)close(fd); 1276 (void)unlink(f); 1277 return 0; 1278 } 1279 } else if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 1280 warn("Can't remove user `%s' from `%s': " 1281 "short write to `%s'", login_name, _PATH_GROUP, f); 1282 (void)fclose(from); 1283 (void)close(fd); 1284 (void)unlink(f); 1285 return 0; 1286 } 1287 } 1288 (void)fclose(from); 1289 (void)fclose(to); 1290 if (rename(f, _PATH_GROUP) < 0) { 1291 warn("Can't remove user `%s' from `%s': " 1292 "can't rename `%s' to `%s'", 1293 login_name, _PATH_GROUP, f, _PATH_GROUP); 1294 (void)unlink(f); 1295 return 0; 1296 } 1297 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 1298 return 1; 1299 } 1300 1301 /* check that the user or group is local, not from YP/NIS */ 1302 static int 1303 is_local(char *name, const char *file) 1304 { 1305 FILE *fp; 1306 char buf[MaxEntryLen]; 1307 size_t len; 1308 int ret; 1309 1310 if ((fp = fopen(file, "r")) == NULL) { 1311 err(EXIT_FAILURE, "Can't open `%s'", file); 1312 } 1313 len = strlen(name); 1314 for (ret = 0 ; fgets(buf, sizeof(buf), fp) != NULL ; ) { 1315 if (strncmp(buf, name, len) == 0 && buf[len] == ':') { 1316 ret = 1; 1317 break; 1318 } 1319 } 1320 (void)fclose(fp); 1321 return ret; 1322 } 1323 1324 /* modify a user */ 1325 static int 1326 moduser(char *login_name, char *newlogin, user_t *up, int allow_samba) 1327 { 1328 struct passwd *pwp; 1329 struct group *grp; 1330 const char *homedir; 1331 char *locked_pwd; 1332 size_t colonc; 1333 size_t loginc; 1334 size_t len; 1335 size_t cc; 1336 FILE *master; 1337 char newdir[MaxFileNameLen]; 1338 char buf[MaxEntryLen]; 1339 char *colon; 1340 int masterfd; 1341 int ptmpfd; 1342 int error; 1343 1344 if (!valid_login(newlogin, allow_samba)) { 1345 errx(EXIT_FAILURE, "Can't modify user `%s': invalid login name", 1346 login_name); 1347 } 1348 if ((pwp = getpwnam(login_name)) == NULL) { 1349 errx(EXIT_FAILURE, "Can't modify user `%s': no such user", 1350 login_name); 1351 } 1352 if (!is_local(login_name, _PATH_MASTERPASSWD)) { 1353 errx(EXIT_FAILURE, "Can't modify user `%s': must be a local user", 1354 login_name); 1355 } 1356 /* keep dir name in case we need it for '-m' */ 1357 homedir = pwp->pw_dir; 1358 1359 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1360 err(EXIT_FAILURE, "Can't modify user `%s': can't open `%s'", 1361 login_name, _PATH_MASTERPASSWD); 1362 } 1363 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1364 err(EXIT_FAILURE, "Can't modify user `%s': can't lock `%s'", 1365 login_name, _PATH_MASTERPASSWD); 1366 } 1367 pw_init(); 1368 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1369 int serrno = errno; 1370 (void)close(masterfd); 1371 errno = serrno; 1372 err(EXIT_FAILURE, "Can't modify user `%s': " 1373 "can't obtain pw_lock", login_name); 1374 } 1375 if ((master = fdopen(masterfd, "r")) == NULL) { 1376 int serrno = errno; 1377 (void)close(masterfd); 1378 (void)close(ptmpfd); 1379 (void)pw_abort(); 1380 errno = serrno; 1381 err(EXIT_FAILURE, "Can't modify user `%s': " 1382 "fdopen fd for %s", login_name, _PATH_MASTERPASSWD); 1383 } 1384 if (up != NULL) { 1385 if (up->u_flags & F_USERNAME) { 1386 /* 1387 * If changing name, 1388 * check new name isn't already in use 1389 */ 1390 if (strcmp(login_name, newlogin) != 0 && 1391 getpwnam(newlogin) != NULL) { 1392 (void)close(ptmpfd); 1393 (void)pw_abort(); 1394 errx(EXIT_FAILURE, "Can't modify user `%s': " 1395 "`%s' is already a user", login_name, 1396 newlogin); 1397 } 1398 pwp->pw_name = newlogin; 1399 1400 /* 1401 * Provide a new directory name in case the 1402 * home directory is to be moved. 1403 */ 1404 if (up->u_flags & F_MKDIR) { 1405 (void)snprintf(newdir, sizeof(newdir), "%s/%s", 1406 up->u_basedir, newlogin); 1407 pwp->pw_dir = newdir; 1408 } 1409 } 1410 if (up->u_flags & F_PASSWORD) { 1411 if (up->u_password != NULL) { 1412 if (!valid_password_length(up->u_password)) { 1413 (void)close(ptmpfd); 1414 (void)pw_abort(); 1415 errx(EXIT_FAILURE, 1416 "Can't modify user `%s': " 1417 "invalid password: `%s'", 1418 login_name, up->u_password); 1419 } 1420 if ((locked_pwd = 1421 strstr(pwp->pw_passwd, LOCKED)) != NULL) { 1422 /* 1423 * account is locked - keep it locked 1424 * and just change the password. 1425 */ 1426 if (asprintf(&locked_pwd, "%s%s", 1427 LOCKED, up->u_password) == -1) { 1428 (void)close(ptmpfd); 1429 (void)pw_abort(); 1430 err(EXIT_FAILURE, 1431 "Can't modify user `%s': " 1432 "asprintf failed", 1433 login_name); 1434 } 1435 pwp->pw_passwd = locked_pwd; 1436 } else { 1437 pwp->pw_passwd = up->u_password; 1438 } 1439 } 1440 } 1441 1442 /* check whether we should lock the account. */ 1443 if (up->u_locked == LOCK) { 1444 /* check to see account if already locked. */ 1445 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1446 != NULL) { 1447 warnx("Account is already locked"); 1448 } else { 1449 if (asprintf(&locked_pwd, "%s%s", LOCKED, 1450 pwp->pw_passwd) == -1) { 1451 (void)close(ptmpfd); 1452 (void)pw_abort(); 1453 err(EXIT_FAILURE, 1454 "Can't modify user `%s': " 1455 "asprintf failed", login_name); 1456 } 1457 pwp->pw_passwd = locked_pwd; 1458 } 1459 } else if (up->u_locked == UNLOCK) { 1460 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1461 == NULL) { 1462 warnx("Can't modify user `%s': " 1463 "account is not locked", login_name); 1464 } else { 1465 pwp->pw_passwd = locked_pwd + strlen(LOCKED); 1466 } 1467 } 1468 1469 if (up->u_flags & F_UID) { 1470 /* check uid isn't already allocated */ 1471 if (!(up->u_flags & F_DUPUID) && 1472 getpwuid((uid_t)(up->u_uid)) != NULL) { 1473 (void)close(ptmpfd); 1474 (void)pw_abort(); 1475 errx(EXIT_FAILURE, "Can't modify user `%s': " 1476 "uid `%d' is already in use", login_name, 1477 up->u_uid); 1478 } 1479 pwp->pw_uid = up->u_uid; 1480 } 1481 if (up->u_flags & F_GROUP) { 1482 /* if -g=uid was specified, check gid is unused */ 1483 if (strcmp(up->u_primgrp, "=uid") == 0) { 1484 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1485 (void)close(ptmpfd); 1486 (void)pw_abort(); 1487 errx(EXIT_FAILURE, 1488 "Can't modify user `%s': " 1489 "gid %d is already in use", 1490 login_name, up->u_uid); 1491 } 1492 pwp->pw_gid = up->u_uid; 1493 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1494 pwp->pw_gid = grp->gr_gid; 1495 } else if (is_number(up->u_primgrp) && 1496 (grp = getgrgid( 1497 (gid_t)atoi(up->u_primgrp))) != NULL) { 1498 pwp->pw_gid = grp->gr_gid; 1499 } else { 1500 (void)close(ptmpfd); 1501 (void)pw_abort(); 1502 errx(EXIT_FAILURE, "Can't modify user `%s': " 1503 "group %s not found", login_name, 1504 up->u_primgrp); 1505 } 1506 } 1507 if (up->u_flags & F_INACTIVE) { 1508 if (!scantime(&pwp->pw_change, up->u_inactive)) { 1509 warnx("Warning: inactive time `%s' invalid, " 1510 "password expiry off", 1511 up->u_inactive); 1512 } 1513 } 1514 if (up->u_flags & F_EXPIRE) { 1515 if (!scantime(&pwp->pw_expire, up->u_expire) || 1516 pwp->pw_expire == -1) { 1517 warnx("Warning: expire time `%s' invalid, " 1518 "account expiry off", 1519 up->u_expire); 1520 pwp->pw_expire = 0; 1521 } 1522 } 1523 if (up->u_flags & F_COMMENT) { 1524 pwp->pw_gecos = up->u_comment; 1525 } 1526 if (up->u_flags & F_HOMEDIR) { 1527 pwp->pw_dir = up->u_home; 1528 } 1529 if (up->u_flags & F_SHELL) { 1530 pwp->pw_shell = up->u_shell; 1531 } 1532 #ifdef EXTENSIONS 1533 if (up->u_flags & F_CLASS) { 1534 if (!valid_class(up->u_class)) { 1535 (void)close(ptmpfd); 1536 (void)pw_abort(); 1537 errx(EXIT_FAILURE, "Can't modify user `%s': " 1538 "no such login class `%s'", login_name, 1539 up->u_class); 1540 } 1541 pwp->pw_class = up->u_class; 1542 } 1543 #endif 1544 } 1545 loginc = strlen(login_name); 1546 while (fgets(buf, sizeof(buf), master) != NULL) { 1547 if ((colon = strchr(buf, ':')) == NULL) { 1548 warnx("Malformed entry `%s'. Skipping", buf); 1549 continue; 1550 } 1551 colonc = (size_t)(colon - buf); 1552 if (strncmp(login_name, buf, loginc) == 0 && loginc == colonc) { 1553 if (up != NULL) { 1554 len = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:" 1555 #ifdef EXTENSIONS 1556 "%s" 1557 #endif 1558 ":%ld:%ld:%s:%s:%s\n", 1559 newlogin, 1560 pwp->pw_passwd, 1561 pwp->pw_uid, 1562 pwp->pw_gid, 1563 #ifdef EXTENSIONS 1564 pwp->pw_class, 1565 #endif 1566 (long)pwp->pw_change, 1567 (long)pwp->pw_expire, 1568 pwp->pw_gecos, 1569 pwp->pw_dir, 1570 pwp->pw_shell); 1571 if (write(ptmpfd, buf, len) != len) { 1572 int serrno = errno; 1573 (void)close(ptmpfd); 1574 (void)pw_abort(); 1575 errno = serrno; 1576 err(EXIT_FAILURE, "Can't modify user " 1577 "`%s': write", login_name); 1578 } 1579 } 1580 } else { 1581 len = strlen(buf); 1582 if ((cc = write(ptmpfd, buf, len)) != len) { 1583 int serrno = errno; 1584 (void)close(masterfd); 1585 (void)close(ptmpfd); 1586 (void)pw_abort(); 1587 errno = serrno; 1588 err(EXIT_FAILURE, "Can't modify `%s': " 1589 "write", login_name); 1590 } 1591 } 1592 } 1593 if (up != NULL) { 1594 if ((up->u_flags & F_MKDIR) && 1595 asystem("%s %s %s", MV, homedir, pwp->pw_dir) != 0) { 1596 (void)close(ptmpfd); 1597 (void)pw_abort(); 1598 errx(EXIT_FAILURE, "Can't modify user `%s': " 1599 "can't move `%s' to `%s'", 1600 login_name, homedir, pwp->pw_dir); 1601 } 1602 if (up->u_groupc > 0 && 1603 !append_group(newlogin, up->u_groupc, up->u_groupv)) { 1604 (void)close(ptmpfd); 1605 (void)pw_abort(); 1606 errx(EXIT_FAILURE, "Can't modify user `%s': " 1607 "can't append `%s' to new groups", 1608 login_name, newlogin); 1609 } 1610 } 1611 (void)close(ptmpfd); 1612 #if PW_MKDB_ARGC == 2 1613 if (up != NULL && strcmp(login_name, newlogin) == 0) { 1614 error = pw_mkdb(login_name, 0); 1615 } else { 1616 error = pw_mkdb(NULL, 0); 1617 } 1618 #else 1619 error = pw_mkdb(); 1620 #endif 1621 if (error < 0) { 1622 (void)pw_abort(); 1623 errx(EXIT_FAILURE, "Can't modify user `%s': pw_mkdb failed", 1624 login_name); 1625 } 1626 if (up == NULL) { 1627 syslog(LOG_INFO, "User removed: name=%s", login_name); 1628 } else if (strcmp(login_name, newlogin) == 0) { 1629 syslog(LOG_INFO, "User information modified: name=%s, uid=%d, " 1630 "gid=%d, home=%s, shell=%s", 1631 login_name, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, 1632 pwp->pw_shell); 1633 } else { 1634 syslog(LOG_INFO, "User information modified: name=%s, " 1635 "new name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1636 login_name, newlogin, pwp->pw_uid, pwp->pw_gid, 1637 pwp->pw_dir, pwp->pw_shell); 1638 } 1639 return 1; 1640 } 1641 1642 #ifdef EXTENSIONS 1643 /* see if we can find out the user struct */ 1644 static struct passwd * 1645 find_user_info(const char *name) 1646 { 1647 struct passwd *pwp; 1648 1649 if ((pwp = getpwnam(name)) != NULL) { 1650 return pwp; 1651 } 1652 if (is_number(name) && (pwp = getpwuid((uid_t)atoi(name))) != NULL) { 1653 return pwp; 1654 } 1655 return NULL; 1656 } 1657 #endif 1658 1659 /* see if we can find out the group struct */ 1660 static struct group * 1661 find_group_info(const char *name) 1662 { 1663 struct group *grp; 1664 1665 if ((grp = getgrnam(name)) != NULL) { 1666 return grp; 1667 } 1668 if (is_number(name) && (grp = getgrgid((gid_t)atoi(name))) != NULL) { 1669 return grp; 1670 } 1671 return NULL; 1672 } 1673 1674 /* print out usage message, and then exit */ 1675 void 1676 usermgmt_usage(const char *prog) 1677 { 1678 if (strcmp(prog, "useradd") == 0) { 1679 (void)fprintf(stderr, "usage: %s -D [-F] [-b base-dir] " 1680 "[-e expiry-time] [-f inactive-time]\n" 1681 "\t[-g gid | name | =uid] [-k skel-dir] [-L login-class]\n" 1682 "\t[-r lowuid..highuid] [-s shell]\n", prog); 1683 (void)fprintf(stderr, "usage: %s [-moSv] [-b base-dir] " 1684 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1685 "\t[-f inactive-time] [-G secondary-group] " 1686 "[-g gid | name | =uid]\n" 1687 "\t[-k skeletondir] [-L login-class] [-p password]" 1688 "[-r lowuid..highuid]\n" 1689 "\t[-s shell] [-u uid] user\n", 1690 prog); 1691 } else if (strcmp(prog, "usermod") == 0) { 1692 (void)fprintf(stderr, "usage: %s [-FmoSv] [-C yes/no] " 1693 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1694 "\t[-f inactive] [-G secondary-group] " 1695 "[-g gid | name | =uid]\n" 1696 "\t[-L login-class] [-l new-login] [-p password] " 1697 "[-s shell] [-u uid]\n" 1698 "\tuser\n", prog); 1699 } else if (strcmp(prog, "userdel") == 0) { 1700 (void)fprintf(stderr, "usage: %s -D [-p preserve-value]\n", prog); 1701 (void)fprintf(stderr, 1702 "usage: %s [-rSv] [-p preserve-value] user\n", prog); 1703 #ifdef EXTENSIONS 1704 } else if (strcmp(prog, "userinfo") == 0) { 1705 (void)fprintf(stderr, "usage: %s [-ev] user\n", prog); 1706 #endif 1707 } else if (strcmp(prog, "groupadd") == 0) { 1708 (void)fprintf(stderr, "usage: %s [-ov] [-g gid]" 1709 " [-r lowgid..highgid] group\n", prog); 1710 } else if (strcmp(prog, "groupdel") == 0) { 1711 (void)fprintf(stderr, "usage: %s [-v] group\n", prog); 1712 } else if (strcmp(prog, "groupmod") == 0) { 1713 (void)fprintf(stderr, 1714 "usage: %s [-ov] [-g gid] [-n newname] group\n", prog); 1715 } else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) { 1716 (void)fprintf(stderr, 1717 "usage: %s ( add | del | mod | info ) ...\n", prog); 1718 #ifdef EXTENSIONS 1719 } else if (strcmp(prog, "groupinfo") == 0) { 1720 (void)fprintf(stderr, "usage: %s [-ev] group\n", prog); 1721 #endif 1722 } 1723 exit(EXIT_FAILURE); 1724 /* NOTREACHED */ 1725 } 1726 1727 #ifdef EXTENSIONS 1728 #define ADD_OPT_EXTENSIONS "p:r:vL:S" 1729 #else 1730 #define ADD_OPT_EXTENSIONS 1731 #endif 1732 1733 int 1734 useradd(int argc, char **argv) 1735 { 1736 user_t u; 1737 int defaultfield; 1738 int bigD; 1739 int c; 1740 #ifdef EXTENSIONS 1741 int i; 1742 #endif 1743 1744 (void)memset(&u, 0, sizeof(u)); 1745 read_defaults(&u); 1746 u.u_uid = -1; 1747 defaultfield = bigD = 0; 1748 while ((c = getopt(argc, argv, "DFG:b:c:d:e:f:g:k:mou:s:" 1749 ADD_OPT_EXTENSIONS)) != -1) { 1750 switch(c) { 1751 case 'D': 1752 bigD = 1; 1753 break; 1754 case 'F': 1755 /* 1756 * Setting -1 will force the new user to 1757 * change their password as soon as they 1758 * next log in - passwd(5). 1759 */ 1760 defaultfield = 1; 1761 memsave(&u.u_inactive, "-1", strlen("-1")); 1762 break; 1763 case 'G': 1764 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1765 u.u_groupc < NGROUPS_MAX) { 1766 if (u.u_groupv[u.u_groupc][0] != 0) { 1767 u.u_groupc++; 1768 } 1769 } 1770 if (optarg != NULL) { 1771 warnx("Truncated list of secondary groups " 1772 "to %d entries", NGROUPS_MAX); 1773 } 1774 break; 1775 #ifdef EXTENSIONS 1776 case 'S': 1777 u.u_allow_samba = 1; 1778 break; 1779 #endif 1780 case 'b': 1781 defaultfield = 1; 1782 memsave(&u.u_basedir, optarg, strlen(optarg)); 1783 break; 1784 case 'c': 1785 memsave(&u.u_comment, optarg, strlen(optarg)); 1786 break; 1787 case 'd': 1788 memsave(&u.u_home, optarg, strlen(optarg)); 1789 u.u_flags |= F_HOMEDIR; 1790 break; 1791 case 'e': 1792 defaultfield = 1; 1793 memsave(&u.u_expire, optarg, strlen(optarg)); 1794 break; 1795 case 'f': 1796 defaultfield = 1; 1797 memsave(&u.u_inactive, optarg, strlen(optarg)); 1798 break; 1799 case 'g': 1800 defaultfield = 1; 1801 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1802 break; 1803 case 'k': 1804 defaultfield = 1; 1805 memsave(&u.u_skeldir, optarg, strlen(optarg)); 1806 break; 1807 #ifdef EXTENSIONS 1808 case 'L': 1809 defaultfield = 1; 1810 memsave(&u.u_class, optarg, strlen(optarg)); 1811 break; 1812 #endif 1813 case 'm': 1814 u.u_flags |= F_MKDIR; 1815 break; 1816 case 'o': 1817 u.u_flags |= F_DUPUID; 1818 break; 1819 #ifdef EXTENSIONS 1820 case 'p': 1821 memsave(&u.u_password, optarg, strlen(optarg)); 1822 break; 1823 #endif 1824 #ifdef EXTENSIONS 1825 case 'r': 1826 defaultfield = 1; 1827 (void)save_range(&u, optarg); 1828 break; 1829 #endif 1830 case 's': 1831 defaultfield = 1; 1832 memsave(&u.u_shell, optarg, strlen(optarg)); 1833 break; 1834 case 'u': 1835 u.u_uid = check_numeric(optarg, "uid"); 1836 break; 1837 #ifdef EXTENSIONS 1838 case 'v': 1839 verbose = 1; 1840 break; 1841 #endif 1842 default: 1843 usermgmt_usage("useradd"); 1844 /* NOTREACHED */ 1845 } 1846 } 1847 if (bigD) { 1848 if (defaultfield) { 1849 checkeuid(); 1850 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1851 } 1852 (void)printf("group\t\t%s\n", u.u_primgrp); 1853 (void)printf("base_dir\t%s\n", u.u_basedir); 1854 (void)printf("skel_dir\t%s\n", u.u_skeldir); 1855 (void)printf("shell\t\t%s\n", u.u_shell); 1856 #ifdef EXTENSIONS 1857 (void)printf("class\t\t%s\n", u.u_class); 1858 #endif 1859 (void)printf("inactive\t%s\n", (u.u_inactive == NULL) ? 1860 UNSET_INACTIVE : u.u_inactive); 1861 (void)printf("expire\t\t%s\n", (u.u_expire == NULL) ? 1862 UNSET_EXPIRY : u.u_expire); 1863 #ifdef EXTENSIONS 1864 for (i = 0 ; i < u.u_rc ; i++) { 1865 (void)printf("range\t\t%d..%d\n", 1866 u.u_rv[i].r_from, u.u_rv[i].r_to); 1867 } 1868 #endif 1869 return EXIT_SUCCESS; 1870 } 1871 argc -= optind; 1872 argv += optind; 1873 if (argc != 1) { 1874 usermgmt_usage("useradd"); 1875 } 1876 checkeuid(); 1877 openlog("useradd", LOG_PID, LOG_USER); 1878 return adduser(*argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1879 } 1880 1881 #ifdef EXTENSIONS 1882 #define MOD_OPT_EXTENSIONS "p:vL:S" 1883 #else 1884 #define MOD_OPT_EXTENSIONS 1885 #endif 1886 1887 int 1888 usermod(int argc, char **argv) 1889 { 1890 user_t u; 1891 char newuser[MaxUserNameLen + 1]; 1892 int c, have_new_user; 1893 1894 (void)memset(&u, 0, sizeof(u)); 1895 (void)memset(newuser, 0, sizeof(newuser)); 1896 read_defaults(&u); 1897 have_new_user = 0; 1898 u.u_locked = -1; 1899 while ((c = getopt(argc, argv, "C:FG:c:d:e:f:g:l:mos:u:" 1900 MOD_OPT_EXTENSIONS)) != -1) { 1901 switch(c) { 1902 case 'G': 1903 while ((u.u_groupv[u.u_groupc] = 1904 strsep(&optarg, ",")) != NULL && 1905 u.u_groupc < NGROUPS_MAX) { 1906 if (u.u_groupv[u.u_groupc][0] != 0) { 1907 u.u_groupc++; 1908 } 1909 } 1910 if (optarg != NULL) { 1911 warnx("Truncated list of secondary groups " 1912 "to %d entries", NGROUPS_MAX); 1913 } 1914 u.u_flags |= F_SECGROUP; 1915 break; 1916 #ifdef EXTENSIONS 1917 case 'S': 1918 u.u_allow_samba = 1; 1919 break; 1920 #endif 1921 case 'c': 1922 memsave(&u.u_comment, optarg, strlen(optarg)); 1923 u.u_flags |= F_COMMENT; 1924 break; 1925 case 'C': 1926 if (strcasecmp(optarg, "yes") == 0) { 1927 u.u_locked = LOCK; 1928 } else if (strcasecmp(optarg, "no") == 0) { 1929 u.u_locked = UNLOCK; 1930 } else { 1931 /* No idea. */ 1932 errx(EXIT_FAILURE, 1933 "Please type 'yes' or 'no'"); 1934 } 1935 break; 1936 case 'F': 1937 memsave(&u.u_inactive, "-1", strlen("-1")); 1938 u.u_flags |= F_INACTIVE; 1939 break; 1940 case 'd': 1941 memsave(&u.u_home, optarg, strlen(optarg)); 1942 u.u_flags |= F_HOMEDIR; 1943 break; 1944 case 'e': 1945 memsave(&u.u_expire, optarg, strlen(optarg)); 1946 u.u_flags |= F_EXPIRE; 1947 break; 1948 case 'f': 1949 memsave(&u.u_inactive, optarg, strlen(optarg)); 1950 u.u_flags |= F_INACTIVE; 1951 break; 1952 case 'g': 1953 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1954 u.u_flags |= F_GROUP; 1955 break; 1956 case 'l': 1957 (void)strlcpy(newuser, optarg, sizeof(newuser)); 1958 have_new_user = 1; 1959 u.u_flags |= F_USERNAME; 1960 break; 1961 #ifdef EXTENSIONS 1962 case 'L': 1963 memsave(&u.u_class, optarg, strlen(optarg)); 1964 u.u_flags |= F_CLASS; 1965 break; 1966 #endif 1967 case 'm': 1968 u.u_flags |= F_MKDIR; 1969 break; 1970 case 'o': 1971 u.u_flags |= F_DUPUID; 1972 break; 1973 #ifdef EXTENSIONS 1974 case 'p': 1975 memsave(&u.u_password, optarg, strlen(optarg)); 1976 u.u_flags |= F_PASSWORD; 1977 break; 1978 #endif 1979 case 's': 1980 memsave(&u.u_shell, optarg, strlen(optarg)); 1981 u.u_flags |= F_SHELL; 1982 break; 1983 case 'u': 1984 u.u_uid = check_numeric(optarg, "uid"); 1985 u.u_flags |= F_UID; 1986 break; 1987 #ifdef EXTENSIONS 1988 case 'v': 1989 verbose = 1; 1990 break; 1991 #endif 1992 default: 1993 usermgmt_usage("usermod"); 1994 /* NOTREACHED */ 1995 } 1996 } 1997 if ((u.u_flags & F_MKDIR) && !(u.u_flags & F_HOMEDIR) && 1998 !(u.u_flags & F_USERNAME)) { 1999 warnx("Option 'm' useless without 'd' or 'l' -- ignored"); 2000 u.u_flags &= ~F_MKDIR; 2001 } 2002 argc -= optind; 2003 argv += optind; 2004 if (argc != 1) { 2005 usermgmt_usage("usermod"); 2006 } 2007 checkeuid(); 2008 openlog("usermod", LOG_PID, LOG_USER); 2009 return moduser(*argv, (have_new_user) ? newuser : *argv, &u, 2010 u.u_allow_samba) ? EXIT_SUCCESS : EXIT_FAILURE; 2011 } 2012 2013 #ifdef EXTENSIONS 2014 #define DEL_OPT_EXTENSIONS "Dp:vS" 2015 #else 2016 #define DEL_OPT_EXTENSIONS 2017 #endif 2018 2019 int 2020 userdel(int argc, char **argv) 2021 { 2022 struct passwd *pwp; 2023 user_t u; 2024 char password[PasswordLength + 1]; 2025 int defaultfield; 2026 int rmhome; 2027 int bigD; 2028 int c; 2029 2030 (void)memset(&u, 0, sizeof(u)); 2031 read_defaults(&u); 2032 defaultfield = bigD = rmhome = 0; 2033 while ((c = getopt(argc, argv, "r" DEL_OPT_EXTENSIONS)) != -1) { 2034 switch(c) { 2035 #ifdef EXTENSIONS 2036 case 'D': 2037 bigD = 1; 2038 break; 2039 #endif 2040 #ifdef EXTENSIONS 2041 case 'S': 2042 u.u_allow_samba = 1; 2043 break; 2044 #endif 2045 #ifdef EXTENSIONS 2046 case 'p': 2047 defaultfield = 1; 2048 u.u_preserve = (strcmp(optarg, "true") == 0) ? 1 : 2049 (strcmp(optarg, "yes") == 0) ? 1 : 2050 atoi(optarg); 2051 break; 2052 #endif 2053 case 'r': 2054 rmhome = 1; 2055 break; 2056 #ifdef EXTENSIONS 2057 case 'v': 2058 verbose = 1; 2059 break; 2060 #endif 2061 default: 2062 usermgmt_usage("userdel"); 2063 /* NOTREACHED */ 2064 } 2065 } 2066 #ifdef EXTENSIONS 2067 if (bigD) { 2068 if (defaultfield) { 2069 checkeuid(); 2070 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 2071 } 2072 (void)printf("preserve\t%s\n", (u.u_preserve) ? "true" : 2073 "false"); 2074 return EXIT_SUCCESS; 2075 } 2076 #endif 2077 argc -= optind; 2078 argv += optind; 2079 if (argc != 1) { 2080 usermgmt_usage("userdel"); 2081 } 2082 checkeuid(); 2083 if ((pwp = getpwnam(*argv)) == NULL) { 2084 warnx("No such user `%s'", *argv); 2085 return EXIT_FAILURE; 2086 } 2087 if (rmhome) { 2088 (void)removehomedir(pwp); 2089 } 2090 if (u.u_preserve) { 2091 u.u_flags |= F_SHELL; 2092 memsave(&u.u_shell, NOLOGIN, strlen(NOLOGIN)); 2093 (void)memset(password, '*', DES_Len); 2094 password[DES_Len] = 0; 2095 memsave(&u.u_password, password, strlen(password)); 2096 u.u_flags |= F_PASSWORD; 2097 openlog("userdel", LOG_PID, LOG_USER); 2098 return moduser(*argv, *argv, &u, u.u_allow_samba) ? 2099 EXIT_SUCCESS : EXIT_FAILURE; 2100 } 2101 if (!rm_user_from_groups(*argv)) { 2102 return 0; 2103 } 2104 openlog("userdel", LOG_PID, LOG_USER); 2105 return moduser(*argv, *argv, NULL, u.u_allow_samba) ? 2106 EXIT_SUCCESS : EXIT_FAILURE; 2107 } 2108 2109 #ifdef EXTENSIONS 2110 #define GROUP_ADD_OPT_EXTENSIONS "r:v" 2111 #else 2112 #define GROUP_ADD_OPT_EXTENSIONS 2113 #endif 2114 2115 /* add a group */ 2116 int 2117 groupadd(int argc, char **argv) 2118 { 2119 int dupgid; 2120 int gid; 2121 int c; 2122 int lowgid; 2123 int highgid; 2124 2125 gid = -1; 2126 dupgid = 0; 2127 lowgid = LowGid; 2128 highgid = HighGid; 2129 while ((c = getopt(argc, argv, "g:o" GROUP_ADD_OPT_EXTENSIONS)) != -1) { 2130 switch(c) { 2131 case 'g': 2132 gid = check_numeric(optarg, "gid"); 2133 break; 2134 case 'o': 2135 dupgid = 1; 2136 break; 2137 #ifdef EXTENSIONS 2138 case 'r': 2139 if (sscanf(optarg, "%d..%d", &lowgid, &highgid) != 2) { 2140 errx(EXIT_FAILURE, "Bad range `%s'", optarg); 2141 } 2142 break; 2143 case 'v': 2144 verbose = 1; 2145 break; 2146 #endif 2147 default: 2148 usermgmt_usage("groupadd"); 2149 /* NOTREACHED */ 2150 } 2151 } 2152 argc -= optind; 2153 argv += optind; 2154 if (argc != 1) { 2155 usermgmt_usage("groupadd"); 2156 } 2157 checkeuid(); 2158 if (gid < 0 && !getnextgid(&gid, lowgid, highgid)) { 2159 err(EXIT_FAILURE, "Can't add group: can't get next gid"); 2160 } 2161 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 2162 errx(EXIT_FAILURE, "Can't add group: gid %d is a duplicate", 2163 gid); 2164 } 2165 if (!valid_group(*argv)) { 2166 warnx("Invalid group name `%s'", *argv); 2167 } 2168 openlog("groupadd", LOG_PID, LOG_USER); 2169 if (!creategid(*argv, gid, "")) 2170 exit(EXIT_FAILURE); 2171 2172 return EXIT_SUCCESS; 2173 } 2174 2175 #ifdef EXTENSIONS 2176 #define GROUP_DEL_OPT_EXTENSIONS "v" 2177 #else 2178 #define GROUP_DEL_OPT_EXTENSIONS 2179 #endif 2180 2181 /* remove a group */ 2182 int 2183 groupdel(int argc, char **argv) 2184 { 2185 int c; 2186 2187 while ((c = getopt(argc, argv, "" GROUP_DEL_OPT_EXTENSIONS)) != -1) { 2188 switch(c) { 2189 #ifdef EXTENSIONS 2190 case 'v': 2191 verbose = 1; 2192 break; 2193 #endif 2194 default: 2195 usermgmt_usage("groupdel"); 2196 /* NOTREACHED */ 2197 } 2198 } 2199 argc -= optind; 2200 argv += optind; 2201 if (argc != 1) { 2202 usermgmt_usage("groupdel"); 2203 } 2204 if (getgrnam(*argv) == NULL) { 2205 errx(EXIT_FAILURE, "No such group `%s'", *argv); 2206 } 2207 checkeuid(); 2208 openlog("groupdel", LOG_PID, LOG_USER); 2209 if (!modify_gid(*argv, NULL)) 2210 exit(EXIT_FAILURE); 2211 2212 return EXIT_SUCCESS; 2213 } 2214 2215 #ifdef EXTENSIONS 2216 #define GROUP_MOD_OPT_EXTENSIONS "v" 2217 #else 2218 #define GROUP_MOD_OPT_EXTENSIONS 2219 #endif 2220 2221 /* modify a group */ 2222 int 2223 groupmod(int argc, char **argv) 2224 { 2225 struct group *grp; 2226 char buf[MaxEntryLen]; 2227 char *newname; 2228 char **cpp; 2229 int dupgid; 2230 int gid; 2231 int cc; 2232 int c; 2233 2234 gid = -1; 2235 dupgid = 0; 2236 newname = NULL; 2237 while ((c = getopt(argc, argv, "g:on:" GROUP_MOD_OPT_EXTENSIONS)) != -1) { 2238 switch(c) { 2239 case 'g': 2240 gid = check_numeric(optarg, "gid"); 2241 break; 2242 case 'o': 2243 dupgid = 1; 2244 break; 2245 case 'n': 2246 memsave(&newname, optarg, strlen(optarg)); 2247 break; 2248 #ifdef EXTENSIONS 2249 case 'v': 2250 verbose = 1; 2251 break; 2252 #endif 2253 default: 2254 usermgmt_usage("groupmod"); 2255 /* NOTREACHED */ 2256 } 2257 } 2258 argc -= optind; 2259 argv += optind; 2260 if (argc != 1) { 2261 usermgmt_usage("groupmod"); 2262 } 2263 checkeuid(); 2264 if (gid < 0 && newname == NULL) { 2265 errx(EXIT_FAILURE, "Nothing to change"); 2266 } 2267 if (dupgid && gid < 0) { 2268 errx(EXIT_FAILURE, "Duplicate which gid?"); 2269 } 2270 if ((grp = find_group_info(*argv)) == NULL) { 2271 errx(EXIT_FAILURE, "Can't find group `%s' to modify", *argv); 2272 } 2273 if (!is_local(*argv, _PATH_GROUP)) { 2274 errx(EXIT_FAILURE, "Group `%s' must be a local group", *argv); 2275 } 2276 if (newname != NULL && !valid_group(newname)) { 2277 warnx("Invalid group name `%s'", newname); 2278 } 2279 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:", 2280 (newname) ? newname : grp->gr_name, 2281 grp->gr_passwd, 2282 (gid < 0) ? grp->gr_gid : gid); 2283 for (cpp = grp->gr_mem ; *cpp && cc < sizeof(buf) ; cpp++) { 2284 cc += snprintf(&buf[cc], sizeof(buf) - cc, "%s%s", *cpp, 2285 (cpp[1] == NULL) ? "" : ","); 2286 } 2287 cc += snprintf(&buf[cc], sizeof(buf) - cc, "\n"); 2288 openlog("groupmod", LOG_PID, LOG_USER); 2289 if (!modify_gid(*argv, buf)) 2290 exit(EXIT_FAILURE); 2291 2292 return EXIT_SUCCESS; 2293 } 2294 2295 #ifdef EXTENSIONS 2296 /* display user information */ 2297 int 2298 userinfo(int argc, char **argv) 2299 { 2300 struct passwd *pwp; 2301 struct group *grp; 2302 char buf[MaxEntryLen]; 2303 char **cpp; 2304 int exists; 2305 int cc; 2306 int i; 2307 2308 exists = 0; 2309 while ((i = getopt(argc, argv, "ev")) != -1) { 2310 switch(i) { 2311 case 'e': 2312 exists = 1; 2313 break; 2314 case 'v': 2315 verbose = 1; 2316 break; 2317 default: 2318 usermgmt_usage("userinfo"); 2319 /* NOTREACHED */ 2320 } 2321 } 2322 argc -= optind; 2323 argv += optind; 2324 if (argc != 1) { 2325 usermgmt_usage("userinfo"); 2326 } 2327 pwp = find_user_info(*argv); 2328 if (exists) { 2329 exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE); 2330 } 2331 if (pwp == NULL) { 2332 errx(EXIT_FAILURE, "Can't find user `%s'", *argv); 2333 } 2334 (void)printf("login\t%s\n", pwp->pw_name); 2335 (void)printf("passwd\t%s\n", pwp->pw_passwd); 2336 (void)printf("uid\t%d\n", pwp->pw_uid); 2337 for (cc = 0 ; (grp = getgrent()) != NULL ; ) { 2338 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2339 if (strcmp(*cpp, *argv) == 0 && 2340 grp->gr_gid != pwp->pw_gid) { 2341 cc += snprintf(&buf[cc], sizeof(buf) - cc, 2342 "%s ", grp->gr_name); 2343 } 2344 } 2345 } 2346 if ((grp = getgrgid(pwp->pw_gid)) == NULL) { 2347 (void)printf("groups\t%d %s\n", pwp->pw_gid, buf); 2348 } else { 2349 (void)printf("groups\t%s %s\n", grp->gr_name, buf); 2350 } 2351 (void)printf("change\t%s", pwp->pw_change > 0 ? 2352 ctime(&pwp->pw_change) : pwp->pw_change == -1 ? 2353 "NEXT LOGIN\n" : "NEVER\n"); 2354 (void)printf("class\t%s\n", pwp->pw_class); 2355 (void)printf("gecos\t%s\n", pwp->pw_gecos); 2356 (void)printf("dir\t%s\n", pwp->pw_dir); 2357 (void)printf("shell\t%s\n", pwp->pw_shell); 2358 (void)printf("expire\t%s", pwp->pw_expire ? 2359 ctime(&pwp->pw_expire) : "NEVER\n"); 2360 return EXIT_SUCCESS; 2361 } 2362 #endif 2363 2364 #ifdef EXTENSIONS 2365 /* display user information */ 2366 int 2367 groupinfo(int argc, char **argv) 2368 { 2369 struct group *grp; 2370 char **cpp; 2371 int exists; 2372 int i; 2373 2374 exists = 0; 2375 while ((i = getopt(argc, argv, "ev")) != -1) { 2376 switch(i) { 2377 case 'e': 2378 exists = 1; 2379 break; 2380 case 'v': 2381 verbose = 1; 2382 break; 2383 default: 2384 usermgmt_usage("groupinfo"); 2385 /* NOTREACHED */ 2386 } 2387 } 2388 argc -= optind; 2389 argv += optind; 2390 if (argc != 1) { 2391 usermgmt_usage("groupinfo"); 2392 } 2393 grp = find_group_info(*argv); 2394 if (exists) { 2395 exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE); 2396 } 2397 if (grp == NULL) { 2398 errx(EXIT_FAILURE, "Can't find group `%s'", *argv); 2399 } 2400 (void)printf("name\t%s\n", grp->gr_name); 2401 (void)printf("passwd\t%s\n", grp->gr_passwd); 2402 (void)printf("gid\t%d\n", grp->gr_gid); 2403 (void)printf("members\t"); 2404 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2405 (void)printf("%s", *cpp); 2406 if (*(cpp + 1)) { 2407 (void) printf(", "); 2408 } 2409 } 2410 (void)fputc('\n', stdout); 2411 return EXIT_SUCCESS; 2412 } 2413 #endif 2414