user.c revision 1.89
1 /* $NetBSD: user.c,v 1.89 2005/09/09 21:48:10 wiz Exp $ */ 2 3 /* 4 * Copyright (c) 1999 Alistair G. Crooks. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Alistair G. Crooks. 17 * 4. The name of the author may not be used to endorse or promote 18 * products derived from this software without specific prior written 19 * permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 22 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 #include <sys/cdefs.h> 34 35 #ifndef lint 36 __COPYRIGHT("@(#) Copyright (c) 1999 \ 37 The NetBSD Foundation, Inc. All rights reserved."); 38 __RCSID("$NetBSD: user.c,v 1.89 2005/09/09 21:48:10 wiz Exp $"); 39 #endif 40 41 #include <sys/types.h> 42 #include <sys/param.h> 43 #include <sys/stat.h> 44 45 #include <ctype.h> 46 #include <dirent.h> 47 #include <err.h> 48 #include <fcntl.h> 49 #include <grp.h> 50 #ifdef EXTENSIONS 51 #include <login_cap.h> 52 #endif 53 #include <paths.h> 54 #include <pwd.h> 55 #include <regex.h> 56 #include <stdarg.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <syslog.h> 61 #include <time.h> 62 #include <unistd.h> 63 #include <util.h> 64 #include <errno.h> 65 66 #include "defs.h" 67 #include "usermgmt.h" 68 69 70 /* this struct describes a uid range */ 71 typedef struct range_t { 72 int r_from; /* low uid */ 73 int r_to; /* high uid */ 74 } range_t; 75 76 /* this struct encapsulates the user information */ 77 typedef struct user_t { 78 int u_flags; /* see below */ 79 int u_uid; /* uid of user */ 80 char *u_password; /* encrypted password */ 81 char *u_comment; /* comment field */ 82 char *u_home; /* home directory */ 83 char *u_primgrp; /* primary group */ 84 int u_groupc; /* # of secondary groups */ 85 const char *u_groupv[NGROUPS_MAX]; /* secondary groups */ 86 char *u_shell; /* user's shell */ 87 char *u_basedir; /* base directory for home */ 88 char *u_expire; /* when password will expire */ 89 char *u_inactive; /* when account will expire */ 90 char *u_skeldir; /* directory for startup files */ 91 char *u_class; /* login class */ 92 unsigned u_rsize; /* size of range array */ 93 unsigned u_rc; /* # of ranges */ 94 range_t *u_rv; /* the ranges */ 95 unsigned u_defrc; /* # of ranges in defaults */ 96 int u_preserve; /* preserve uids on deletion */ 97 int u_allow_samba; /* allow trailing '$' for samba login names */ 98 int u_locked; /* user account lock */ 99 } user_t; 100 101 /* flags for which fields of the user_t replace the passwd entry */ 102 enum { 103 F_COMMENT = 0x0001, 104 F_DUPUID = 0x0002, 105 F_EXPIRE = 0x0004, 106 F_GROUP = 0x0008, 107 F_HOMEDIR = 0x0010, 108 F_MKDIR = 0x0020, 109 F_INACTIVE = 0x0040, 110 F_PASSWORD = 0x0080, 111 F_SECGROUP = 0x0100, 112 F_SHELL = 0x0200, 113 F_UID = 0x0400, 114 F_USERNAME = 0x0800, 115 F_CLASS = 0x1000 116 }; 117 118 #define UNLOCK 0 119 #define LOCK 1 120 #define LOCKED "*LOCKED*" 121 122 #define CONFFILE "/etc/usermgmt.conf" 123 #define PATH_LOGINCONF "/etc/login.conf" 124 125 #ifndef DEF_GROUP 126 #define DEF_GROUP "users" 127 #endif 128 129 #ifndef DEF_BASEDIR 130 #define DEF_BASEDIR "/home" 131 #endif 132 133 #ifndef DEF_SKELDIR 134 #define DEF_SKELDIR "/etc/skel" 135 #endif 136 137 #ifndef DEF_SHELL 138 #define DEF_SHELL _PATH_CSHELL 139 #endif 140 141 #ifndef DEF_COMMENT 142 #define DEF_COMMENT "" 143 #endif 144 145 #ifndef DEF_LOWUID 146 #define DEF_LOWUID 1000 147 #endif 148 149 #ifndef DEF_HIGHUID 150 #define DEF_HIGHUID 60000 151 #endif 152 153 #ifndef DEF_INACTIVE 154 #define DEF_INACTIVE 0 155 #endif 156 157 #ifndef DEF_EXPIRE 158 #define DEF_EXPIRE NULL 159 #endif 160 161 #ifndef DEF_CLASS 162 #define DEF_CLASS "" 163 #endif 164 165 #ifndef WAITSECS 166 #define WAITSECS 10 167 #endif 168 169 #ifndef NOBODY_UID 170 #define NOBODY_UID 32767 171 #endif 172 173 /* some useful constants */ 174 enum { 175 MaxShellNameLen = 256, 176 MaxFileNameLen = MAXPATHLEN, 177 MaxUserNameLen = 32, 178 MaxFieldNameLen = 32, 179 MaxCommandLen = 2048, 180 MaxEntryLen = 2048, 181 PasswordLength = 2048, 182 183 DES_Len = 13, 184 185 LowGid = DEF_LOWUID, 186 HighGid = DEF_HIGHUID 187 }; 188 189 /* Full paths of programs used here */ 190 #define CHMOD "/bin/chmod" 191 #define CHOWN "/usr/sbin/chown" 192 #define MKDIR "/bin/mkdir" 193 #define MV "/bin/mv" 194 #define NOLOGIN "/sbin/nologin" 195 #define PAX "/bin/pax" 196 #define RM "/bin/rm" 197 198 #define UNSET_INACTIVE "Null (unset)" 199 #define UNSET_EXPIRY "Null (unset)" 200 201 static int asystem(const char *fmt, ...) 202 __attribute__((__format__(__printf__, 1, 2))); 203 static int is_number(const char *); 204 205 static int verbose; 206 207 static char * 208 skipspace(char *s) 209 { 210 for (; *s && isspace((unsigned char)*s) ; s++) 211 continue; 212 return s; 213 } 214 215 static int 216 check_numeric(const char *val, const char *name) 217 { 218 if (!is_number(val)) 219 errx(EXIT_FAILURE, "When using [-%c %s], " 220 "the %s must be numeric", *name, name, name); 221 return atoi(val); 222 } 223 224 /* if *cpp is non-null, free it, then assign `n' chars of `s' to it */ 225 static void 226 memsave(char **cpp, const char *s, size_t n) 227 { 228 if (*cpp != NULL) { 229 FREE(*cpp); 230 } 231 NEWARRAY(char, *cpp, n + 1, exit(1)); 232 (void)memcpy(*cpp, s, n); 233 (*cpp)[n] = '\0'; 234 } 235 236 /* a replacement for system(3) */ 237 static int 238 asystem(const char *fmt, ...) 239 { 240 va_list vp; 241 char buf[MaxCommandLen]; 242 int ret; 243 244 va_start(vp, fmt); 245 (void)vsnprintf(buf, sizeof(buf), fmt, vp); 246 va_end(vp); 247 if (verbose) { 248 (void)printf("Command: %s\n", buf); 249 } 250 if ((ret = system(buf)) != 0) { 251 warn("Error running `%s'", buf); 252 } 253 return ret; 254 } 255 256 /* remove a users home directory, returning 1 for success (ie, no problems encountered) */ 257 static int 258 removehomedir(const char *user, uid_t uid, const char *dir) 259 { 260 struct stat st; 261 262 /* userid not root? */ 263 if (uid == 0) { 264 warnx("Not deleting home directory `%s'; userid is 0", dir); 265 return 0; 266 } 267 268 /* directory exists (and is a directory!) */ 269 if (stat(dir, &st) < 0) { 270 warn("Cannot access home directory `%s'", dir); 271 return 0; 272 } 273 if (!S_ISDIR(st.st_mode)) { 274 warnx("Home directory `%s' is not a directory", dir); 275 return 0; 276 } 277 278 /* userid matches directory owner? */ 279 if (st.st_uid != uid) { 280 warnx("User `%s' doesn't own directory `%s', not removed", 281 user, dir); 282 return 0; 283 } 284 285 (void)seteuid(uid); 286 /* we add the "|| true" to keep asystem() quiet if there is a non-zero exit status. */ 287 (void)asystem("%s -rf %s > /dev/null 2>&1 || true", RM, dir); 288 (void)seteuid(0); 289 if (rmdir(dir) < 0) { 290 warn("Unable to remove all files in `%s'", dir); 291 return 0; 292 } 293 return 1; 294 } 295 296 #define NetBSD_1_4_K 104110000 297 298 #if defined(__NetBSD_Version__) && (__NetBSD_Version__ < NetBSD_1_4_K) 299 /* bounds checking strncpy */ 300 static int 301 strlcpy(char *to, char *from, size_t tosize) 302 { 303 size_t n; 304 int fromsize; 305 306 fromsize = strlen(from); 307 n = MIN(tosize - 1, fromsize); 308 (void)memcpy(to, from, n); 309 to[n] = '\0'; 310 return fromsize; 311 } 312 #endif /* NetBSD < 1.4K */ 313 314 /* 315 * Copyright (c) 1997 Todd C. Miller <Todd.Miller (at) courtesan.com> 316 * All rights reserved. 317 * 318 * Redistribution and use in source and binary forms, with or without 319 * modification, are permitted provided that the following conditions 320 * are met: 321 * 1. Redistributions of source code must retain the above copyright 322 * notice, this list of conditions and the following disclaimer. 323 * 2. Redistributions in binary form must reproduce the above copyright 324 * notice, this list of conditions and the following disclaimer in the 325 * documentation and/or other materials provided with the distribution. 326 * 3. The name of the author may not be used to endorse or promote products 327 * derived from this software without specific prior written permission. 328 * 329 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 330 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 331 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 332 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 333 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 334 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 335 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 336 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 337 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 338 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 339 */ 340 341 /* 342 * research has shown that NetBSD 1.3H was the first version of -current 343 * with asprintf in libc. agc 344 */ 345 #define NetBSD_1_3_H 103080000 346 347 #if defined(__NetBSD_Version__) && (__NetBSD_Version__ < NetBSD_1_3_H) 348 349 int 350 asprintf(char **str, char const *fmt, ...) 351 { 352 int ret; 353 va_list ap; 354 FILE f; 355 unsigned char *_base; 356 357 f._flags = __SWR | __SSTR | __SALC; 358 f._bf._base = f._p = (unsigned char *)malloc(128); 359 if (f._bf._base == NULL) 360 goto err; 361 f._bf._size = f._w = 127; /* Leave room for the NUL */ 362 va_start(ap, fmt); 363 ret = vfprintf(&f, fmt, ap); 364 va_end(ap); 365 if (ret == -1) 366 goto err; 367 *f._p = '\0'; 368 _base = realloc(f._bf._base, (size_t)(ret + 1)); 369 if (_base == NULL) 370 goto err; 371 *str = (char *)_base; 372 return (ret); 373 374 err: 375 if (f._bf._base) 376 free(f._bf._base); 377 *str = NULL; 378 return (-1); 379 } 380 #endif /* NetBSD < 1.3H */ 381 382 /* return 1 if all of `s' is numeric */ 383 static int 384 is_number(const char *s) 385 { 386 for ( ; *s ; s++) { 387 if (!isdigit((unsigned char) *s)) { 388 return 0; 389 } 390 } 391 return 1; 392 } 393 394 /* 395 * check that the effective uid is 0 - called from funcs which will 396 * modify data and config files. 397 */ 398 static void 399 checkeuid(void) 400 { 401 if (geteuid() != 0) { 402 errx(EXIT_FAILURE, "Program must be run as root"); 403 } 404 } 405 406 /* copy any dot files into the user's home directory */ 407 static int 408 copydotfiles(char *skeldir, int uid, int gid, char *dir) 409 { 410 struct dirent *dp; 411 DIR *dirp; 412 int n; 413 414 if ((dirp = opendir(skeldir)) == NULL) { 415 warn("Can't open source . files dir `%s'", skeldir); 416 return 0; 417 } 418 for (n = 0; (dp = readdir(dirp)) != NULL && n == 0 ; ) { 419 if (strcmp(dp->d_name, ".") == 0 || 420 strcmp(dp->d_name, "..") == 0) { 421 continue; 422 } 423 n = 1; 424 } 425 (void)closedir(dirp); 426 if (n == 0) { 427 warnx("No \"dot\" initialisation files found"); 428 } else { 429 (void)asystem("cd %s && %s -rw -pe %s . %s", 430 skeldir, PAX, (verbose) ? "-v" : "", dir); 431 } 432 (void)asystem("%s -R -h %d:%d %s", CHOWN, uid, gid, dir); 433 (void)asystem("%s -R u+w %s", CHMOD, dir); 434 return n; 435 } 436 437 /* create a group entry with gid `gid' */ 438 static int 439 creategid(char *group, int gid, const char *name) 440 { 441 struct stat st; 442 FILE *from; 443 FILE *to; 444 char buf[MaxEntryLen]; 445 char f[MaxFileNameLen]; 446 int fd; 447 int cc; 448 449 if (getgrnam(group) != NULL) { 450 warnx("Group `%s' already exists", group); 451 return 0; 452 } 453 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 454 warn("Can't create gid for `%s': can't open `%s'", name, 455 _PATH_GROUP); 456 return 0; 457 } 458 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 459 warn("Can't lock `%s'", _PATH_GROUP); 460 } 461 (void)fstat(fileno(from), &st); 462 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 463 if ((fd = mkstemp(f)) < 0) { 464 warn("Can't create gid: mkstemp failed"); 465 (void)fclose(from); 466 return 0; 467 } 468 if ((to = fdopen(fd, "w")) == NULL) { 469 warn("Can't create gid: fdopen `%s' failed", f); 470 (void)fclose(from); 471 (void)close(fd); 472 (void)unlink(f); 473 return 0; 474 } 475 while ((cc = fread(buf, sizeof(char), sizeof(buf), from)) > 0) { 476 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 477 warn("Can't create gid: short write to `%s'", f); 478 (void)fclose(from); 479 (void)close(fd); 480 (void)unlink(f); 481 return 0; 482 } 483 } 484 (void)fprintf(to, "%s:*:%d:%s\n", group, gid, name); 485 (void)fclose(from); 486 (void)fclose(to); 487 if (rename(f, _PATH_GROUP) < 0) { 488 warn("Can't create gid: can't rename `%s' to `%s'", f, 489 _PATH_GROUP); 490 (void)unlink(f); 491 return 0; 492 } 493 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 494 syslog(LOG_INFO, "New group added: name=%s, gid=%d", group, gid); 495 return 1; 496 } 497 498 /* modify the group entry with name `group' to be newent */ 499 static int 500 modify_gid(char *group, char *newent) 501 { 502 struct stat st; 503 FILE *from; 504 FILE *to; 505 char buf[MaxEntryLen]; 506 char f[MaxFileNameLen]; 507 char *colon; 508 int groupc; 509 int entc; 510 int fd; 511 int cc; 512 513 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 514 warn("Can't create gid for `%s': can't open `%s'", 515 group, _PATH_GROUP); 516 return 0; 517 } 518 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 519 warn("Can't lock `%s'", _PATH_GROUP); 520 } 521 (void)fstat(fileno(from), &st); 522 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 523 if ((fd = mkstemp(f)) < 0) { 524 warn("Can't create gid: mkstemp failed"); 525 (void)fclose(from); 526 return 0; 527 } 528 if ((to = fdopen(fd, "w")) == NULL) { 529 warn("Can't create gid: fdopen `%s' failed", f); 530 (void)fclose(from); 531 (void)close(fd); 532 (void)unlink(f); 533 return 0; 534 } 535 groupc = strlen(group); 536 while (fgets(buf, sizeof(buf), from) != NULL) { 537 cc = strlen(buf); 538 if ((colon = strchr(buf, ':')) == NULL) { 539 warnx("Badly formed entry `%s'", buf); 540 continue; 541 } 542 entc = (int)(colon - buf); 543 if (entc == groupc && 544 strncmp(group, buf, (unsigned) entc) == 0) { 545 if (newent == NULL) { 546 continue; 547 } else { 548 cc = strlen(newent); 549 (void)strlcpy(buf, newent, sizeof(buf)); 550 } 551 } 552 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 553 warn("Can't create gid: short write to `%s'", f); 554 (void)fclose(from); 555 (void)close(fd); 556 (void)unlink(f); 557 return 0; 558 } 559 } 560 (void)fclose(from); 561 (void)fclose(to); 562 if (rename(f, _PATH_GROUP) < 0) { 563 warn("Can't create gid: can't rename `%s' to `%s'", f, 564 _PATH_GROUP); 565 (void)unlink(f); 566 return 0; 567 } 568 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 569 if (newent == NULL) { 570 syslog(LOG_INFO, "group deleted: name=%s", group); 571 } else { 572 syslog(LOG_INFO, "group information modified: name=%s", group); 573 } 574 return 1; 575 } 576 577 /* modify the group entries for all `groups', by adding `user' */ 578 static int 579 append_group(char *user, int ngroups, const char **groups) 580 { 581 struct group *grp; 582 struct stat st; 583 FILE *from; 584 FILE *to; 585 char buf[MaxEntryLen]; 586 char f[MaxFileNameLen]; 587 char *colon; 588 int groupc; 589 int entc; 590 int fd; 591 int nc; 592 int cc; 593 int i; 594 int j; 595 596 for (i = 0 ; i < ngroups ; i++) { 597 if ((grp = getgrnam(groups[i])) == NULL) { 598 warnx("Can't append group `%s' for user `%s'", 599 groups[i], user); 600 } else { 601 for (j = 0 ; grp->gr_mem[j] ; j++) { 602 if (strcmp(user, grp->gr_mem[j]) == 0) { 603 /* already in it */ 604 groups[i] = ""; 605 } 606 } 607 } 608 } 609 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 610 warn("Can't append group for `%s': can't open `%s'", 611 user, _PATH_GROUP); 612 return 0; 613 } 614 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 615 warn("Can't lock `%s'", _PATH_GROUP); 616 } 617 (void)fstat(fileno(from), &st); 618 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 619 if ((fd = mkstemp(f)) < 0) { 620 warn("Can't create gid: mkstemp failed"); 621 (void)fclose(from); 622 return 0; 623 } 624 if ((to = fdopen(fd, "w")) == NULL) { 625 warn("Can't create gid: fdopen `%s' failed", f); 626 (void)fclose(from); 627 (void)close(fd); 628 (void)unlink(f); 629 return 0; 630 } 631 while (fgets(buf, sizeof(buf), from) != NULL) { 632 cc = strlen(buf); 633 if ((colon = strchr(buf, ':')) == NULL) { 634 warnx("Badly formed entry `%s'", buf); 635 continue; 636 } 637 entc = (int)(colon - buf); 638 for (i = 0 ; i < ngroups ; i++) { 639 if ((groupc = strlen(groups[i])) == 0) { 640 continue; 641 } 642 if (entc == groupc && 643 strncmp(groups[i], buf, (unsigned) entc) == 0) { 644 if ((nc = snprintf(&buf[cc - 1], 645 sizeof(buf) - cc + 1, "%s%s\n", 646 (buf[cc - 2] == ':') ? "" : ",", user)) < 0) 647 warnx("Warning: group `%s' " 648 "entry too long", groups[i]); 649 cc += nc - 1; 650 } 651 } 652 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 653 warn("Can't create gid: short write to `%s'", f); 654 (void)fclose(from); 655 (void)close(fd); 656 (void)unlink(f); 657 return 0; 658 } 659 } 660 (void)fclose(from); 661 (void)fclose(to); 662 if (rename(f, _PATH_GROUP) < 0) { 663 warn("Can't create gid: can't rename `%s' to `%s'", 664 f, _PATH_GROUP); 665 (void)unlink(f); 666 return 0; 667 } 668 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 669 return 1; 670 } 671 672 /* the valid characters for login and group names */ 673 #define VALID_CHAR(c) (isalnum(c) || (c) == '.' || (c) == '_' || (c) == '-') 674 675 /* return 1 if `login' is a valid login name */ 676 static int 677 valid_login(char *login_name, int allow_samba) 678 { 679 unsigned char *cp; 680 681 if (strlen(login_name) >= LOGIN_NAME_MAX) { 682 return 0; 683 } 684 for (cp = (unsigned char *)login_name ; *cp ; cp++) { 685 if (!VALID_CHAR(*cp)) { 686 #ifdef EXTENSIONS 687 /* check for a trailing '$' in a Samba user name */ 688 if (allow_samba && *cp == '$' && *(cp + 1) == 0x0) { 689 return 1; 690 } 691 #endif 692 return 0; 693 } 694 } 695 return 1; 696 } 697 698 /* return 1 if `group' is a valid group name */ 699 static int 700 valid_group(char *group) 701 { 702 unsigned char *cp; 703 704 for (cp = (unsigned char *)group; *cp; cp++) { 705 if (!VALID_CHAR(*cp)) { 706 return 0; 707 } 708 } 709 return 1; 710 } 711 712 /* find the next gid in the range lo .. hi */ 713 static int 714 getnextgid(int *gidp, int lo, int hi) 715 { 716 for (*gidp = lo ; *gidp < hi ; *gidp += 1) { 717 if (getgrgid((gid_t)*gidp) == NULL) { 718 return 1; 719 } 720 } 721 return 0; 722 } 723 724 #ifdef EXTENSIONS 725 /* save a range of uids */ 726 static int 727 save_range(user_t *up, char *cp) 728 { 729 int from; 730 int to; 731 int i; 732 733 if (up->u_rsize == 0) { 734 up->u_rsize = 32; 735 NEWARRAY(range_t, up->u_rv, up->u_rsize, return(0)); 736 } else if (up->u_rc == up->u_rsize) { 737 up->u_rsize *= 2; 738 RENEW(range_t, up->u_rv, up->u_rsize, return(0)); 739 } 740 if (up->u_rv && sscanf(cp, "%d..%d", &from, &to) == 2) { 741 for (i = up->u_defrc ; i < up->u_rc ; i++) { 742 if (up->u_rv[i].r_from == from && 743 up->u_rv[i].r_to == to) { 744 break; 745 } 746 } 747 if (i == up->u_rc) { 748 up->u_rv[up->u_rc].r_from = from; 749 up->u_rv[up->u_rc].r_to = to; 750 up->u_rc += 1; 751 } 752 } else { 753 warnx("Bad range `%s'", cp); 754 return 0; 755 } 756 return 1; 757 } 758 #endif 759 760 /* set the defaults in the defaults file */ 761 static int 762 setdefaults(user_t *up) 763 { 764 char template[MaxFileNameLen]; 765 FILE *fp; 766 int ret; 767 int fd; 768 #ifdef EXTENSIONS 769 int i; 770 #endif 771 772 (void)snprintf(template, sizeof(template), "%s.XXXXXX", CONFFILE); 773 if ((fd = mkstemp(template)) < 0) { 774 warnx("Can't mkstemp `%s' for writing", CONFFILE); 775 return 0; 776 } 777 if ((fp = fdopen(fd, "w")) == NULL) { 778 warn("Can't fdopen `%s' for writing", CONFFILE); 779 return 0; 780 } 781 ret = 1; 782 if (fprintf(fp, "group\t\t%s\n", up->u_primgrp) <= 0 || 783 fprintf(fp, "base_dir\t%s\n", up->u_basedir) <= 0 || 784 fprintf(fp, "skel_dir\t%s\n", up->u_skeldir) <= 0 || 785 fprintf(fp, "shell\t\t%s\n", up->u_shell) <= 0 || 786 #ifdef EXTENSIONS 787 fprintf(fp, "class\t\t%s\n", up->u_class) <= 0 || 788 #endif 789 fprintf(fp, "inactive\t%s\n", (up->u_inactive == NULL) ? 790 UNSET_INACTIVE : up->u_inactive) <= 0 || 791 fprintf(fp, "expire\t\t%s\n", (up->u_expire == NULL) ? 792 UNSET_EXPIRY : up->u_expire) <= 0 || 793 fprintf(fp, "preserve\t%s\n", (up->u_preserve == 0) ? 794 "false" : "true") <= 0) { 795 warn("Can't write to `%s'", CONFFILE); 796 ret = 0; 797 } 798 #ifdef EXTENSIONS 799 for (i = (up->u_defrc != up->u_rc) ? up->u_defrc : 0; 800 i < up->u_rc ; i++) { 801 if (fprintf(fp, "range\t\t%d..%d\n", up->u_rv[i].r_from, 802 up->u_rv[i].r_to) <= 0) { 803 warn("Can't write to `%s'", CONFFILE); 804 ret = 0; 805 } 806 } 807 #endif 808 (void)fclose(fp); 809 if (ret) { 810 ret = ((rename(template, CONFFILE) == 0) && 811 (chmod(CONFFILE, 0644) == 0)); 812 } 813 return ret; 814 } 815 816 /* read the defaults file */ 817 static void 818 read_defaults(user_t *up) 819 { 820 struct stat st; 821 size_t lineno; 822 size_t len; 823 FILE *fp; 824 char *cp; 825 char *s; 826 827 memsave(&up->u_primgrp, DEF_GROUP, strlen(DEF_GROUP)); 828 memsave(&up->u_basedir, DEF_BASEDIR, strlen(DEF_BASEDIR)); 829 memsave(&up->u_skeldir, DEF_SKELDIR, strlen(DEF_SKELDIR)); 830 memsave(&up->u_shell, DEF_SHELL, strlen(DEF_SHELL)); 831 memsave(&up->u_comment, DEF_COMMENT, strlen(DEF_COMMENT)); 832 #ifdef EXTENSIONS 833 memsave(&up->u_class, DEF_CLASS, strlen(DEF_CLASS)); 834 #endif 835 up->u_rsize = 16; 836 up->u_defrc = 0; 837 NEWARRAY(range_t, up->u_rv, up->u_rsize, exit(1)); 838 up->u_inactive = DEF_INACTIVE; 839 up->u_expire = DEF_EXPIRE; 840 if ((fp = fopen(CONFFILE, "r")) == NULL) { 841 if (stat(CONFFILE, &st) < 0 && !setdefaults(up)) { 842 warn("Can't create `%s' defaults file", CONFFILE); 843 } 844 fp = fopen(CONFFILE, "r"); 845 } 846 if (fp != NULL) { 847 while ((s = fparseln(fp, &len, &lineno, NULL, 0)) != NULL) { 848 if (strncmp(s, "group", 5) == 0) { 849 cp = skipspace(s + 5); 850 memsave(&up->u_primgrp, (char *)cp, strlen(cp)); 851 } else if (strncmp(s, "base_dir", 8) == 0) { 852 cp = skipspace(s + 8); 853 memsave(&up->u_basedir, (char *)cp, strlen(cp)); 854 } else if (strncmp(s, "skel_dir", 8) == 0) { 855 cp = skipspace(s + 8); 856 memsave(&up->u_skeldir, (char *)cp, strlen(cp)); 857 } else if (strncmp(s, "shell", 5) == 0) { 858 cp = skipspace(s + 5); 859 memsave(&up->u_shell, cp, strlen(cp)); 860 #ifdef EXTENSIONS 861 } else if (strncmp((char *)s, "class", 5) == 0) { 862 cp = skipspace(s + 5); 863 memsave(&up->u_class, cp, strlen(cp)); 864 #endif 865 } else if (strncmp(s, "inactive", 8) == 0) { 866 cp = skipspace(s + 8); 867 if (strcmp(cp, UNSET_INACTIVE) == 0) { 868 if (up->u_inactive) { 869 FREE(up->u_inactive); 870 } 871 up->u_inactive = NULL; 872 } else { 873 memsave(&up->u_inactive, cp, strlen(cp)); 874 } 875 #ifdef EXTENSIONS 876 } else if (strncmp(s, "range", 5) == 0) { 877 cp = skipspace(s + 5); 878 (void)save_range(up, cp); 879 #endif 880 #ifdef EXTENSIONS 881 } else if (strncmp(s, "preserve", 8) == 0) { 882 cp = skipspace(s + 8); 883 up->u_preserve = 884 (strncmp(cp, "true", 4) == 0) ? 1 : 885 (strncmp(cp, "yes", 3) == 0) ? 1 : atoi(cp); 886 #endif 887 } else if (strncmp(s, "expire", 6) == 0) { 888 cp = skipspace(s + 6); 889 if (strcmp(cp, UNSET_EXPIRY) == 0) { 890 if (up->u_expire) { 891 FREE(up->u_expire); 892 } 893 up->u_expire = NULL; 894 } else { 895 memsave(&up->u_expire, cp, strlen(cp)); 896 } 897 } 898 (void)free(s); 899 } 900 (void)fclose(fp); 901 } 902 if (up->u_rc == 0) { 903 up->u_rv[up->u_rc].r_from = DEF_LOWUID; 904 up->u_rv[up->u_rc].r_to = DEF_HIGHUID; 905 up->u_rc += 1; 906 } 907 up->u_defrc = up->u_rc; 908 } 909 910 /* return the next valid unused uid */ 911 static int 912 getnextuid(int sync_uid_gid, int *uid, int low_uid, int high_uid) 913 { 914 for (*uid = low_uid ; *uid <= high_uid ; (*uid)++) { 915 if (getpwuid((uid_t)(*uid)) == NULL && *uid != NOBODY_UID) { 916 if (sync_uid_gid) { 917 if (getgrgid((gid_t)(*uid)) == NULL) { 918 return 1; 919 } 920 } else { 921 return 1; 922 } 923 } 924 } 925 return 0; 926 } 927 928 /* structure which defines a password type */ 929 typedef struct passwd_type_t { 930 const char *type; /* optional type descriptor */ 931 size_t desc_length; /* length of type descriptor */ 932 size_t length; /* length of password */ 933 const char *regex; /* regexp to output the password */ 934 size_t re_sub; /* subscript of regexp to use */ 935 } passwd_type_t; 936 937 static passwd_type_t passwd_types[] = { 938 { "$sha1", 5, 28, "\\$[^$]+\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* SHA1 */ 939 { "$2a", 3, 54, "\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* Blowfish */ 940 { "$1", 2, 34, NULL, 0 }, /* MD5 */ 941 { "", 0, DES_Len,NULL, 0 }, /* standard DES */ 942 { NULL, (size_t)~0, (size_t)~0, NULL, 0 } 943 /* none - terminate search */ 944 }; 945 946 /* return non-zero if it's a valid password - check length for cipher type */ 947 static int 948 valid_password_length(char *newpasswd) 949 { 950 passwd_type_t *pwtp; 951 regmatch_t matchv[10]; 952 regex_t r; 953 954 for (pwtp = passwd_types; pwtp->desc_length != (size_t)~0; pwtp++) { 955 if (strncmp(newpasswd, pwtp->type, pwtp->desc_length) == 0) { 956 if (pwtp->regex == NULL) { 957 return strlen(newpasswd) == pwtp->length; 958 } 959 (void)regcomp(&r, pwtp->regex, REG_EXTENDED); 960 if (regexec(&r, newpasswd, 10, matchv, 0) == 0) { 961 regfree(&r); 962 return (int)(matchv[pwtp->re_sub].rm_eo - 963 matchv[pwtp->re_sub].rm_so + 1) == 964 pwtp->length; 965 } 966 regfree(&r); 967 } 968 } 969 return 0; 970 } 971 972 #ifdef EXTENSIONS 973 static int 974 valid_class(char *class) 975 { 976 login_cap_t *lc; 977 978 if (class == NULL || *class == '\0') 979 return 1; 980 /* 981 * Check if /etc/login.conf exists. login_getclass() will 982 * return 1 due to it not existing, so not informing the 983 * user the actual login class does not exist. 984 */ 985 986 if (access(PATH_LOGINCONF, R_OK) == -1) { 987 warn("Access failed for `%s'; will not validate class `%s'", 988 PATH_LOGINCONF, class); 989 return 1; 990 } 991 992 if ((lc = login_getclass(class)) != NULL) { 993 login_close(lc); 994 return 1; 995 } 996 return 0; 997 } 998 #endif 999 1000 /* look for a valid time, return 0 if it was specified but bad */ 1001 static int 1002 scantime(time_t *tp, char *s) 1003 { 1004 struct tm tm; 1005 char *ep; 1006 long val; 1007 1008 *tp = 0; 1009 if (s != NULL) { 1010 (void)memset(&tm, 0, sizeof(tm)); 1011 if (strptime(s, "%c", &tm) != NULL) { 1012 *tp = mktime(&tm); 1013 if (*tp == -1) 1014 return 0; 1015 return 1; 1016 } else if (strptime(s, "%B %d %Y", &tm) != NULL) { 1017 *tp = mktime(&tm); 1018 if (*tp == -1) 1019 return 0; 1020 return 1; 1021 } else { 1022 errno = 0; 1023 *tp = val = strtol(s, &ep, 10); 1024 if (*ep != '\0' || *tp < -1 || errno == ERANGE) { 1025 *tp = 0; 1026 return 0; 1027 } 1028 if (*tp != val) 1029 return 0; 1030 } 1031 } 1032 return 1; 1033 } 1034 1035 /* add a user */ 1036 static int 1037 adduser(char *login_name, user_t *up) 1038 { 1039 struct group *grp; 1040 struct stat st; 1041 time_t expire; 1042 time_t inactive; 1043 char password[PasswordLength + 1]; 1044 char home[MaxFileNameLen]; 1045 char buf[MaxFileNameLen]; 1046 int sync_uid_gid; 1047 int masterfd; 1048 int ptmpfd; 1049 int gid; 1050 int cc; 1051 int i; 1052 1053 if (!valid_login(login_name, up->u_allow_samba)) { 1054 errx(EXIT_FAILURE, "`%s' is not a valid login name", login_name); 1055 } 1056 #ifdef EXTENSIONS 1057 if (!valid_class(up->u_class)) { 1058 errx(EXIT_FAILURE, "No such login class `%s'", up->u_class); 1059 } 1060 #endif 1061 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1062 err(EXIT_FAILURE, "Can't open `%s'", _PATH_MASTERPASSWD); 1063 } 1064 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1065 err(EXIT_FAILURE, "Can't lock `%s'", _PATH_MASTERPASSWD); 1066 } 1067 pw_init(); 1068 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1069 int serrno = errno; 1070 (void)close(masterfd); 1071 errno = serrno; 1072 err(EXIT_FAILURE, "Can't obtain pw_lock"); 1073 } 1074 while ((cc = read(masterfd, buf, sizeof(buf))) > 0) { 1075 if (write(ptmpfd, buf, (size_t)(cc)) != cc) { 1076 int serrno = errno; 1077 (void)close(masterfd); 1078 (void)close(ptmpfd); 1079 (void)pw_abort(); 1080 errno = serrno; 1081 err(EXIT_FAILURE, "Short write to /etc/ptmp " 1082 "(not %d chars)", cc); 1083 } 1084 } 1085 /* if no uid was specified, get next one in [low_uid..high_uid] range */ 1086 sync_uid_gid = (strcmp(up->u_primgrp, "=uid") == 0); 1087 if (up->u_uid == -1) { 1088 int got_id = 0; 1089 1090 /* 1091 * Look for a free UID in the command line ranges (if any). 1092 * These start after the ranges specified in the config file. 1093 */ 1094 for (i = up->u_defrc; !got_id && i < up->u_rc ; i++) { 1095 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1096 up->u_rv[i].r_from, up->u_rv[i].r_to); 1097 } 1098 /* 1099 * If there were no free UIDs in the command line ranges, 1100 * try the ranges from the config file (there will always 1101 * be at least one default). 1102 */ 1103 for (i = 0; !got_id && i < up->u_defrc; i++) { 1104 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1105 up->u_rv[i].r_from, up->u_rv[i].r_to); 1106 } 1107 if (!got_id) { 1108 (void)close(ptmpfd); 1109 (void)pw_abort(); 1110 errx(EXIT_FAILURE, "can't get next uid for %d", 1111 up->u_uid); 1112 } 1113 } 1114 /* check uid isn't already allocated */ 1115 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1116 (void)close(ptmpfd); 1117 (void)pw_abort(); 1118 errx(EXIT_FAILURE, "uid %d is already in use", up->u_uid); 1119 } 1120 /* if -g=uid was specified, check gid is unused */ 1121 if (sync_uid_gid) { 1122 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1123 (void)close(ptmpfd); 1124 (void)pw_abort(); 1125 errx(EXIT_FAILURE, "gid %d is already in use", 1126 up->u_uid); 1127 } 1128 gid = up->u_uid; 1129 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1130 gid = grp->gr_gid; 1131 } else if (is_number(up->u_primgrp) && 1132 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1133 gid = grp->gr_gid; 1134 } else { 1135 (void)close(ptmpfd); 1136 (void)pw_abort(); 1137 errx(EXIT_FAILURE, "group %s not found", up->u_primgrp); 1138 } 1139 /* check name isn't already in use */ 1140 if (!(up->u_flags & F_DUPUID) && getpwnam(login_name) != NULL) { 1141 (void)close(ptmpfd); 1142 (void)pw_abort(); 1143 errx(EXIT_FAILURE, "already a `%s' user", login_name); 1144 } 1145 if (up->u_flags & F_HOMEDIR) { 1146 (void)strlcpy(home, up->u_home, sizeof(home)); 1147 } else { 1148 /* if home directory hasn't been given, make it up */ 1149 (void)snprintf(home, sizeof(home), "%s/%s", up->u_basedir, 1150 login_name); 1151 } 1152 if (!scantime(&inactive, up->u_inactive)) { 1153 warnx("Warning: inactive time `%s' invalid, password expiry off", 1154 up->u_inactive); 1155 } 1156 if (!scantime(&expire, up->u_expire) || expire == -1) { 1157 warnx("Warning: expire time `%s' invalid, account expiry off", 1158 up->u_expire); 1159 expire = 0; /* Just in case. */ 1160 } 1161 if (lstat(home, &st) < 0 && !(up->u_flags & F_MKDIR)) { 1162 warnx("Warning: home directory `%s' doesn't exist, " 1163 "and -m was not specified", home); 1164 } 1165 password[sizeof(password) - 1] = '\0'; 1166 if (up->u_password != NULL && valid_password_length(up->u_password)) { 1167 (void)strlcpy(password, up->u_password, sizeof(password)); 1168 } else { 1169 (void)memset(password, '*', DES_Len); 1170 password[DES_Len] = 0; 1171 if (up->u_password != NULL) { 1172 warnx("Password `%s' is invalid: setting it to `%s'", 1173 up->u_password, password); 1174 } 1175 } 1176 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1177 login_name, 1178 password, 1179 up->u_uid, 1180 gid, 1181 #ifdef EXTENSIONS 1182 up->u_class, 1183 #else 1184 "", 1185 #endif 1186 (long) inactive, 1187 (long) expire, 1188 up->u_comment, 1189 home, 1190 up->u_shell); 1191 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1192 int serrno = errno; 1193 (void)close(ptmpfd); 1194 (void)pw_abort(); 1195 errno = serrno; 1196 err(EXIT_FAILURE, "Can't add `%s'", buf); 1197 } 1198 if (up->u_flags & F_MKDIR) { 1199 if (lstat(home, &st) == 0) { 1200 (void)close(ptmpfd); 1201 (void)pw_abort(); 1202 errx(EXIT_FAILURE, 1203 "Home directory `%s' already exists", home); 1204 } else { 1205 if (asystem("%s -p %s", MKDIR, home) != 0) { 1206 int serrno = errno; 1207 (void)close(ptmpfd); 1208 (void)pw_abort(); 1209 errno = serrno; 1210 err(EXIT_FAILURE, "Can't mkdir `%s'", home); 1211 } 1212 (void)copydotfiles(up->u_skeldir, up->u_uid, gid, home); 1213 } 1214 } 1215 if (strcmp(up->u_primgrp, "=uid") == 0 && 1216 getgrnam(login_name) == NULL && 1217 !creategid(login_name, gid, login_name)) { 1218 (void)close(ptmpfd); 1219 (void)pw_abort(); 1220 errx(EXIT_FAILURE, "Can't create gid %d for login name %s", 1221 gid, login_name); 1222 } 1223 if (up->u_groupc > 0 && 1224 !append_group(login_name, up->u_groupc, up->u_groupv)) { 1225 (void)close(ptmpfd); 1226 (void)pw_abort(); 1227 errx(EXIT_FAILURE, "Can't append `%s' to new groups", 1228 login_name); 1229 } 1230 (void)close(ptmpfd); 1231 #if PW_MKDB_ARGC == 2 1232 if (pw_mkdb(login_name, 0) < 0) 1233 #else 1234 if (pw_mkdb() < 0) 1235 #endif 1236 { 1237 (void)pw_abort(); 1238 errx(EXIT_FAILURE, "pw_mkdb failed"); 1239 } 1240 syslog(LOG_INFO, "New user added: name=%s, uid=%d, gid=%d, home=%s, " 1241 "shell=%s", login_name, up->u_uid, gid, home, up->u_shell); 1242 return 1; 1243 } 1244 1245 /* remove a user from the groups file */ 1246 static int 1247 rm_user_from_groups(char *login_name) 1248 { 1249 struct stat st; 1250 regmatch_t matchv[10]; 1251 regex_t r; 1252 FILE *from; 1253 FILE *to; 1254 char line[MaxEntryLen]; 1255 char buf[MaxEntryLen]; 1256 char f[MaxFileNameLen]; 1257 int fd; 1258 int cc; 1259 int sc; 1260 1261 (void)snprintf(line, sizeof(line), "(:|,)(%s)(,|$)", login_name); 1262 if ((sc = regcomp(&r, line, REG_EXTENDED|REG_NEWLINE)) != 0) { 1263 (void)regerror(sc, &r, buf, sizeof(buf)); 1264 warnx("Can't compile regular expression `%s' (%s)", line, 1265 buf); 1266 return 0; 1267 } 1268 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 1269 warn("Can't remove gid for `%s': can't open `%s'", 1270 login_name, _PATH_GROUP); 1271 return 0; 1272 } 1273 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 1274 warn("can't lock `%s'", _PATH_GROUP); 1275 } 1276 (void)fstat(fileno(from), &st); 1277 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 1278 if ((fd = mkstemp(f)) < 0) { 1279 warn("Can't create gid: mkstemp failed"); 1280 (void)fclose(from); 1281 return 0; 1282 } 1283 if ((to = fdopen(fd, "w")) == NULL) { 1284 warn("Can't create gid: fdopen `%s' failed", f); 1285 (void)fclose(from); 1286 (void)close(fd); 1287 (void)unlink(f); 1288 return 0; 1289 } 1290 while (fgets(buf, sizeof(buf), from) != NULL) { 1291 cc = strlen(buf); 1292 if (regexec(&r, buf, 10, matchv, 0) == 0) { 1293 if (buf[(int)matchv[1].rm_so] == ',') { 1294 matchv[2].rm_so = matchv[1].rm_so; 1295 } else if (matchv[2].rm_eo != matchv[3].rm_eo) { 1296 matchv[2].rm_eo = matchv[3].rm_eo; 1297 } 1298 cc -= (int) matchv[2].rm_eo; 1299 sc = (int) matchv[2].rm_so; 1300 if (fwrite(buf, sizeof(char), (size_t)sc, to) != sc || 1301 fwrite(&buf[(int)matchv[2].rm_eo], sizeof(char), 1302 (size_t)cc, to) != cc) { 1303 warn("Can't create gid: short write to `%s'", 1304 f); 1305 (void)fclose(from); 1306 (void)close(fd); 1307 (void)unlink(f); 1308 return 0; 1309 } 1310 } else if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 1311 warn("Can't create gid: short write to `%s'", f); 1312 (void)fclose(from); 1313 (void)close(fd); 1314 (void)unlink(f); 1315 return 0; 1316 } 1317 } 1318 (void)fclose(from); 1319 (void)fclose(to); 1320 if (rename(f, _PATH_GROUP) < 0) { 1321 warn("Can't create gid: can't rename `%s' to `%s'", 1322 f, _PATH_GROUP); 1323 (void)unlink(f); 1324 return 0; 1325 } 1326 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 1327 return 1; 1328 } 1329 1330 /* check that the user or group is local, not from YP/NIS */ 1331 static int 1332 is_local(char *name, const char *file) 1333 { 1334 FILE *fp; 1335 char buf[MaxEntryLen]; 1336 size_t len; 1337 int ret; 1338 1339 if ((fp = fopen(file, "r")) == NULL) { 1340 err(EXIT_FAILURE, "Can't open `%s'", file); 1341 } 1342 len = strlen(name); 1343 for (ret = 0 ; fgets(buf, sizeof(buf), fp) != NULL ; ) { 1344 if (strncmp(buf, name, len) == 0 && buf[len] == ':') { 1345 ret = 1; 1346 break; 1347 } 1348 } 1349 (void)fclose(fp); 1350 return ret; 1351 } 1352 1353 /* modify a user */ 1354 static int 1355 moduser(char *login_name, char *newlogin, user_t *up, int allow_samba) 1356 { 1357 struct passwd *pwp; 1358 struct group *grp; 1359 const char *homedir; 1360 char *locked_pwd; 1361 size_t colonc; 1362 size_t loginc; 1363 size_t len; 1364 size_t cc; 1365 FILE *master; 1366 char newdir[MaxFileNameLen]; 1367 char buf[MaxEntryLen]; 1368 char *colon; 1369 int masterfd; 1370 int ptmpfd; 1371 int error; 1372 1373 if (!valid_login(newlogin, allow_samba)) { 1374 errx(EXIT_FAILURE, "`%s' is not a valid login name", 1375 login_name); 1376 } 1377 if ((pwp = getpwnam(login_name)) == NULL) { 1378 errx(EXIT_FAILURE, "No such user `%s'", login_name); 1379 } 1380 if (!is_local(login_name, _PATH_MASTERPASSWD)) { 1381 errx(EXIT_FAILURE, "User `%s' must be a local user", 1382 login_name); 1383 } 1384 /* keep dir name in case we need it for '-m' */ 1385 homedir = pwp->pw_dir; 1386 1387 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1388 err(EXIT_FAILURE, "Can't open `%s'", _PATH_MASTERPASSWD); 1389 } 1390 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1391 err(EXIT_FAILURE, "Can't lock `%s'", _PATH_MASTERPASSWD); 1392 } 1393 pw_init(); 1394 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1395 int serrno = errno; 1396 (void)close(masterfd); 1397 errno = serrno; 1398 err(EXIT_FAILURE, "Can't obtain pw_lock"); 1399 } 1400 if ((master = fdopen(masterfd, "r")) == NULL) { 1401 int serrno = errno; 1402 (void)close(masterfd); 1403 (void)close(ptmpfd); 1404 (void)pw_abort(); 1405 errno = serrno; 1406 err(EXIT_FAILURE, "Can't fdopen fd for %s", _PATH_MASTERPASSWD); 1407 } 1408 if (up != NULL) { 1409 if (up->u_flags & F_USERNAME) { 1410 /* 1411 * If changing name, 1412 * check new name isn't already in use 1413 */ 1414 if (strcmp(login_name, newlogin) != 0 && 1415 getpwnam(newlogin) != NULL) { 1416 (void)close(ptmpfd); 1417 (void)pw_abort(); 1418 errx(EXIT_FAILURE, "Already a `%s' user", 1419 newlogin); 1420 } 1421 pwp->pw_name = newlogin; 1422 1423 /* 1424 * Provide a new directory name in case the 1425 * home directory is to be moved. 1426 */ 1427 if (up->u_flags & F_MKDIR) { 1428 (void)snprintf(newdir, sizeof(newdir), "%s/%s", 1429 up->u_basedir, newlogin); 1430 pwp->pw_dir = newdir; 1431 } 1432 } 1433 if (up->u_flags & F_PASSWORD) { 1434 if (up->u_password != NULL) { 1435 if (!valid_password_length(up->u_password)) { 1436 (void)close(ptmpfd); 1437 (void)pw_abort(); 1438 errx(EXIT_FAILURE, 1439 "Invalid password: `%s'", 1440 up->u_password); 1441 } 1442 if ((locked_pwd = 1443 strstr(pwp->pw_passwd, LOCKED)) != NULL) { 1444 /* 1445 * account is locked - keep it locked 1446 * and just change the password. 1447 */ 1448 if (asprintf(&locked_pwd, "%s%s", 1449 LOCKED, up->u_password) == -1) 1450 err(EXIT_FAILURE, 1451 "asprintf failed"); 1452 pwp->pw_passwd = locked_pwd; 1453 } else 1454 pwp->pw_passwd = up->u_password; 1455 } 1456 } 1457 1458 /* check whether we should lock the account. */ 1459 if (up->u_locked == LOCK) { 1460 /* check to see account if already locked. */ 1461 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1462 != NULL) 1463 warnx("Account is already locked"); 1464 else { 1465 if (asprintf(&locked_pwd, "%s%s", LOCKED, 1466 pwp->pw_passwd) == -1) 1467 err(EXIT_FAILURE, "asprintf failed"); 1468 pwp->pw_passwd = locked_pwd; 1469 } 1470 } else if (up->u_locked == UNLOCK) { 1471 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1472 == NULL) 1473 warnx("Account '%s' is not locked", login_name); 1474 else 1475 pwp->pw_passwd = locked_pwd + strlen(LOCKED); 1476 } 1477 1478 if (up->u_flags & F_UID) { 1479 /* check uid isn't already allocated */ 1480 if (!(up->u_flags & F_DUPUID) && 1481 getpwuid((uid_t)(up->u_uid)) != NULL) { 1482 (void)close(ptmpfd); 1483 (void)pw_abort(); 1484 errx(EXIT_FAILURE, "Uid %d is already in use", 1485 up->u_uid); 1486 } 1487 pwp->pw_uid = up->u_uid; 1488 } 1489 if (up->u_flags & F_GROUP) { 1490 /* if -g=uid was specified, check gid is unused */ 1491 if (strcmp(up->u_primgrp, "=uid") == 0) { 1492 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1493 (void)close(ptmpfd); 1494 (void)pw_abort(); 1495 errx(EXIT_FAILURE, 1496 "Gid %d is already in use", 1497 up->u_uid); 1498 } 1499 pwp->pw_gid = up->u_uid; 1500 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1501 pwp->pw_gid = grp->gr_gid; 1502 } else if (is_number(up->u_primgrp) && 1503 (grp = getgrgid( 1504 (gid_t)atoi(up->u_primgrp))) != NULL) { 1505 pwp->pw_gid = grp->gr_gid; 1506 } else { 1507 (void)close(ptmpfd); 1508 (void)pw_abort(); 1509 errx(EXIT_FAILURE, "Group %s not found", 1510 up->u_primgrp); 1511 } 1512 } 1513 if (up->u_flags & F_INACTIVE) { 1514 if (!scantime(&pwp->pw_change, up->u_inactive)) { 1515 warnx("Warning: inactive time `%s' invalid, " 1516 "password expiry off", 1517 up->u_inactive); 1518 } 1519 } 1520 if (up->u_flags & F_EXPIRE) { 1521 if (!scantime(&pwp->pw_expire, up->u_expire) || 1522 pwp->pw_expire == -1) { 1523 warnx("Warning: expire time `%s' invalid, " 1524 "account expiry off", 1525 up->u_expire); 1526 pwp->pw_expire = 0; 1527 } 1528 } 1529 if (up->u_flags & F_COMMENT) 1530 pwp->pw_gecos = up->u_comment; 1531 if (up->u_flags & F_HOMEDIR) 1532 pwp->pw_dir = up->u_home; 1533 if (up->u_flags & F_SHELL) 1534 pwp->pw_shell = up->u_shell; 1535 #ifdef EXTENSIONS 1536 if (up->u_flags & F_CLASS) { 1537 if (!valid_class(up->u_class)) { 1538 (void)close(ptmpfd); 1539 (void)pw_abort(); 1540 errx(EXIT_FAILURE, "No such login class `%s'", 1541 up->u_class); 1542 } 1543 pwp->pw_class = up->u_class; 1544 } 1545 #endif 1546 } 1547 loginc = strlen(login_name); 1548 while (fgets(buf, sizeof(buf), master) != NULL) { 1549 if ((colon = strchr(buf, ':')) == NULL) { 1550 warnx("Malformed entry `%s'. Skipping", buf); 1551 continue; 1552 } 1553 colonc = (size_t)(colon - buf); 1554 if (strncmp(login_name, buf, loginc) == 0 && loginc == colonc) { 1555 if (up != NULL) { 1556 len = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:" 1557 #ifdef EXTENSIONS 1558 "%s" 1559 #endif 1560 ":%ld:%ld:%s:%s:%s\n", 1561 newlogin, 1562 pwp->pw_passwd, 1563 pwp->pw_uid, 1564 pwp->pw_gid, 1565 #ifdef EXTENSIONS 1566 pwp->pw_class, 1567 #endif 1568 (long)pwp->pw_change, 1569 (long)pwp->pw_expire, 1570 pwp->pw_gecos, 1571 pwp->pw_dir, 1572 pwp->pw_shell); 1573 if (write(ptmpfd, buf, len) != len) { 1574 int serrno = errno; 1575 (void)close(ptmpfd); 1576 (void)pw_abort(); 1577 errno = serrno; 1578 err(EXIT_FAILURE, "Can't add `%s'", 1579 buf); 1580 } 1581 } 1582 } else { 1583 len = strlen(buf); 1584 if ((cc = write(ptmpfd, buf, len)) != len) { 1585 int serrno = errno; 1586 (void)close(masterfd); 1587 (void)close(ptmpfd); 1588 (void)pw_abort(); 1589 errno = serrno; 1590 err(EXIT_FAILURE, "Short write to /etc/ptmp " 1591 "(%ld not %ld chars)", 1592 (unsigned long)cc, 1593 (unsigned long)len); 1594 } 1595 } 1596 } 1597 if (up != NULL) { 1598 if ((up->u_flags & F_MKDIR) && 1599 asystem("%s %s %s", MV, homedir, pwp->pw_dir) != 0) { 1600 int serrno = errno; 1601 (void)close(ptmpfd); 1602 (void)pw_abort(); 1603 errno = serrno; 1604 err(EXIT_FAILURE, "Can't move `%s' to `%s'", 1605 homedir, pwp->pw_dir); 1606 } 1607 if (up->u_groupc > 0 && 1608 !append_group(newlogin, up->u_groupc, up->u_groupv)) { 1609 (void)close(ptmpfd); 1610 (void)pw_abort(); 1611 errx(EXIT_FAILURE, "Can't append `%s' to new groups", 1612 newlogin); 1613 } 1614 } 1615 (void)close(ptmpfd); 1616 #if PW_MKDB_ARGC == 2 1617 if (up != NULL && strcmp(login_name, newlogin) == 0) { 1618 error = pw_mkdb(login_name, 0); 1619 } else { 1620 error = pw_mkdb(NULL, 0); 1621 } 1622 #else 1623 error = pw_mkdb(); 1624 #endif 1625 if (error < 0) { 1626 (void)pw_abort(); 1627 errx(EXIT_FAILURE, "pw_mkdb failed"); 1628 } 1629 if (up == NULL) { 1630 syslog(LOG_INFO, "User removed: name=%s", login_name); 1631 } else if (strcmp(login_name, newlogin) == 0) { 1632 syslog(LOG_INFO, "User information modified: name=%s, uid=%d, " 1633 "gid=%d, home=%s, shell=%s", 1634 login_name, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, 1635 pwp->pw_shell); 1636 } else { 1637 syslog(LOG_INFO, "User information modified: name=%s, " 1638 "new name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1639 login_name, newlogin, pwp->pw_uid, pwp->pw_gid, 1640 pwp->pw_dir, pwp->pw_shell); 1641 } 1642 return 1; 1643 } 1644 1645 #ifdef EXTENSIONS 1646 /* see if we can find out the user struct */ 1647 static struct passwd * 1648 find_user_info(const char *name) 1649 { 1650 struct passwd *pwp; 1651 1652 if ((pwp = getpwnam(name)) != NULL) { 1653 return pwp; 1654 } 1655 if (is_number(name) && (pwp = getpwuid((uid_t)atoi(name))) != NULL) { 1656 return pwp; 1657 } 1658 return NULL; 1659 } 1660 #endif 1661 1662 #ifdef EXTENSIONS 1663 /* see if we can find out the group struct */ 1664 static struct group * 1665 find_group_info(const char *name) 1666 { 1667 struct group *grp; 1668 1669 if ((grp = getgrnam(name)) != NULL) { 1670 return grp; 1671 } 1672 if (is_number(name) && (grp = getgrgid((gid_t)atoi(name))) != NULL) { 1673 return grp; 1674 } 1675 return NULL; 1676 } 1677 #endif 1678 1679 /* print out usage message, and then exit */ 1680 void 1681 usermgmt_usage(const char *prog) 1682 { 1683 if (strcmp(prog, "useradd") == 0) { 1684 (void)fprintf(stderr, "usage: %s -D [-F] [-b base-dir] " 1685 "[-e expiry-time] [-f inactive-time]\n" 1686 "\t[-g gid | name | =uid] [-k skel-dir] [-L login-class]\n" 1687 "\t[-r lowuid..highuid] [-s shell]\n", prog); 1688 (void)fprintf(stderr, "usage: %s [-moSv] [-b base-dir] " 1689 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1690 "\t[-f inactive-time] [-G secondary-group] " 1691 "[-g gid | name | =uid]\n" 1692 "\t[-k skeletondir] [-L login-class] [-p password]" 1693 "[-r lowuid..highuid]\n" 1694 "\t[-s shell] [-u uid] user\n", 1695 prog); 1696 } else if (strcmp(prog, "usermod") == 0) { 1697 (void)fprintf(stderr, "usage: %s [-FmoSv] [-C yes/no] " 1698 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1699 "\t[-f inactive] [-G secondary-group] " 1700 "[-g gid | name | =uid]\n" 1701 "\t[-L login-class] [-l new-login] [-p password] " 1702 "[-s shell] [-u uid]\n" 1703 "\tuser\n", prog); 1704 } else if (strcmp(prog, "userdel") == 0) { 1705 (void)fprintf(stderr, "usage: %s -D [-p preserve-value]\n", prog); 1706 (void)fprintf(stderr, 1707 "usage: %s [-rSv] [-p preserve-value] user\n", prog); 1708 #ifdef EXTENSIONS 1709 } else if (strcmp(prog, "userinfo") == 0) { 1710 (void)fprintf(stderr, "usage: %s [-ev] user\n", prog); 1711 #endif 1712 } else if (strcmp(prog, "groupadd") == 0) { 1713 (void)fprintf(stderr, "usage: %s [-g gid] [-o]" 1714 " [-r lowgid..highgid] [-v] group\n", prog); 1715 } else if (strcmp(prog, "groupdel") == 0) { 1716 (void)fprintf(stderr, "usage: %s [-v] group\n", prog); 1717 } else if (strcmp(prog, "groupmod") == 0) { 1718 (void)fprintf(stderr, 1719 "usage: %s [-g gid] [-o] [-n newname] [-v] group\n", prog); 1720 } else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) { 1721 (void)fprintf(stderr, 1722 "usage: %s ( add | del | mod | info ) ...\n", prog); 1723 #ifdef EXTENSIONS 1724 } else if (strcmp(prog, "groupinfo") == 0) { 1725 (void)fprintf(stderr, "usage: %s [-e] [-v] group\n", prog); 1726 #endif 1727 } 1728 exit(EXIT_FAILURE); 1729 /* NOTREACHED */ 1730 } 1731 1732 #ifdef EXTENSIONS 1733 #define ADD_OPT_EXTENSIONS "p:r:vL:S" 1734 #else 1735 #define ADD_OPT_EXTENSIONS 1736 #endif 1737 1738 int 1739 useradd(int argc, char **argv) 1740 { 1741 user_t u; 1742 int defaultfield; 1743 int bigD; 1744 int c; 1745 #ifdef EXTENSIONS 1746 int i; 1747 #endif 1748 1749 (void)memset(&u, 0, sizeof(u)); 1750 read_defaults(&u); 1751 u.u_uid = -1; 1752 defaultfield = bigD = 0; 1753 while ((c = getopt(argc, argv, "DFG:b:c:d:e:f:g:k:mou:s:" 1754 ADD_OPT_EXTENSIONS)) != -1) { 1755 switch(c) { 1756 case 'D': 1757 bigD = 1; 1758 break; 1759 case 'F': 1760 /* 1761 * Setting -1 will force the new user to 1762 * change their password as soon as they 1763 * next log in - passwd(5). 1764 */ 1765 defaultfield = 1; 1766 memsave(&u.u_inactive, "-1", strlen("-1")); 1767 break; 1768 case 'G': 1769 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1770 u.u_groupc < NGROUPS_MAX) { 1771 if (u.u_groupv[u.u_groupc][0] != 0) { 1772 u.u_groupc++; 1773 } 1774 } 1775 if (optarg != NULL) { 1776 warnx("Truncated list of secondary groups " 1777 "to %d entries", NGROUPS_MAX); 1778 } 1779 break; 1780 #ifdef EXTENSIONS 1781 case 'S': 1782 u.u_allow_samba = 1; 1783 break; 1784 #endif 1785 case 'b': 1786 defaultfield = 1; 1787 memsave(&u.u_basedir, optarg, strlen(optarg)); 1788 break; 1789 case 'c': 1790 memsave(&u.u_comment, optarg, strlen(optarg)); 1791 break; 1792 case 'd': 1793 memsave(&u.u_home, optarg, strlen(optarg)); 1794 u.u_flags |= F_HOMEDIR; 1795 break; 1796 case 'e': 1797 defaultfield = 1; 1798 memsave(&u.u_expire, optarg, strlen(optarg)); 1799 break; 1800 case 'f': 1801 defaultfield = 1; 1802 memsave(&u.u_inactive, optarg, strlen(optarg)); 1803 break; 1804 case 'g': 1805 defaultfield = 1; 1806 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1807 break; 1808 case 'k': 1809 defaultfield = 1; 1810 memsave(&u.u_skeldir, optarg, strlen(optarg)); 1811 break; 1812 #ifdef EXTENSIONS 1813 case 'L': 1814 defaultfield = 1; 1815 memsave(&u.u_class, optarg, strlen(optarg)); 1816 break; 1817 #endif 1818 case 'm': 1819 u.u_flags |= F_MKDIR; 1820 break; 1821 case 'o': 1822 u.u_flags |= F_DUPUID; 1823 break; 1824 #ifdef EXTENSIONS 1825 case 'p': 1826 memsave(&u.u_password, optarg, strlen(optarg)); 1827 break; 1828 #endif 1829 #ifdef EXTENSIONS 1830 case 'r': 1831 defaultfield = 1; 1832 (void)save_range(&u, optarg); 1833 break; 1834 #endif 1835 case 's': 1836 defaultfield = 1; 1837 memsave(&u.u_shell, optarg, strlen(optarg)); 1838 break; 1839 case 'u': 1840 u.u_uid = check_numeric(optarg, "uid"); 1841 break; 1842 #ifdef EXTENSIONS 1843 case 'v': 1844 verbose = 1; 1845 break; 1846 #endif 1847 default: 1848 usermgmt_usage("useradd"); 1849 /* NOTREACHED */ 1850 } 1851 } 1852 if (bigD) { 1853 if (defaultfield) { 1854 checkeuid(); 1855 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1856 } 1857 (void)printf("group\t\t%s\n", u.u_primgrp); 1858 (void)printf("base_dir\t%s\n", u.u_basedir); 1859 (void)printf("skel_dir\t%s\n", u.u_skeldir); 1860 (void)printf("shell\t\t%s\n", u.u_shell); 1861 #ifdef EXTENSIONS 1862 (void)printf("class\t\t%s\n", u.u_class); 1863 #endif 1864 (void)printf("inactive\t%s\n", (u.u_inactive == NULL) ? 1865 UNSET_INACTIVE : u.u_inactive); 1866 (void)printf("expire\t\t%s\n", (u.u_expire == NULL) ? 1867 UNSET_EXPIRY : u.u_expire); 1868 #ifdef EXTENSIONS 1869 for (i = 0 ; i < u.u_rc ; i++) { 1870 (void)printf("range\t\t%d..%d\n", 1871 u.u_rv[i].r_from, u.u_rv[i].r_to); 1872 } 1873 #endif 1874 return EXIT_SUCCESS; 1875 } 1876 argc -= optind; 1877 argv += optind; 1878 if (argc != 1) { 1879 usermgmt_usage("useradd"); 1880 } 1881 checkeuid(); 1882 openlog("useradd", LOG_PID, LOG_USER); 1883 return adduser(*argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1884 } 1885 1886 #ifdef EXTENSIONS 1887 #define MOD_OPT_EXTENSIONS "p:vL:S" 1888 #else 1889 #define MOD_OPT_EXTENSIONS 1890 #endif 1891 1892 int 1893 usermod(int argc, char **argv) 1894 { 1895 user_t u; 1896 char newuser[MaxUserNameLen + 1]; 1897 int c, have_new_user; 1898 1899 (void)memset(&u, 0, sizeof(u)); 1900 (void)memset(newuser, 0, sizeof(newuser)); 1901 read_defaults(&u); 1902 have_new_user = 0; 1903 u.u_locked = -1; 1904 while ((c = getopt(argc, argv, "C:FG:c:d:e:f:g:l:mos:u:" 1905 MOD_OPT_EXTENSIONS)) != -1) { 1906 switch(c) { 1907 case 'G': 1908 while ((u.u_groupv[u.u_groupc] = 1909 strsep(&optarg, ",")) != NULL && 1910 u.u_groupc < NGROUPS_MAX) { 1911 if (u.u_groupv[u.u_groupc][0] != 0) { 1912 u.u_groupc++; 1913 } 1914 } 1915 if (optarg != NULL) { 1916 warnx("Truncated list of secondary groups " 1917 "to %d entries", NGROUPS_MAX); 1918 } 1919 u.u_flags |= F_SECGROUP; 1920 break; 1921 #ifdef EXTENSIONS 1922 case 'S': 1923 u.u_allow_samba = 1; 1924 break; 1925 #endif 1926 case 'c': 1927 memsave(&u.u_comment, optarg, strlen(optarg)); 1928 u.u_flags |= F_COMMENT; 1929 break; 1930 case 'C': 1931 if (strcasecmp(optarg, "yes") == 0) 1932 u.u_locked = LOCK; 1933 else if (strcasecmp(optarg, "no") == 0) 1934 u.u_locked = UNLOCK; 1935 else 1936 /* No idea. */ 1937 errx(1, "Please type 'yes' or 'no'"); 1938 1939 break; 1940 case 'F': 1941 memsave(&u.u_inactive, "-1", strlen("-1")); 1942 u.u_flags |= F_INACTIVE; 1943 break; 1944 case 'd': 1945 memsave(&u.u_home, optarg, strlen(optarg)); 1946 u.u_flags |= F_HOMEDIR; 1947 break; 1948 case 'e': 1949 memsave(&u.u_expire, optarg, strlen(optarg)); 1950 u.u_flags |= F_EXPIRE; 1951 break; 1952 case 'f': 1953 memsave(&u.u_inactive, optarg, strlen(optarg)); 1954 u.u_flags |= F_INACTIVE; 1955 break; 1956 case 'g': 1957 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1958 u.u_flags |= F_GROUP; 1959 break; 1960 case 'l': 1961 (void)strlcpy(newuser, optarg, sizeof(newuser)); 1962 have_new_user = 1; 1963 u.u_flags |= F_USERNAME; 1964 break; 1965 #ifdef EXTENSIONS 1966 case 'L': 1967 memsave(&u.u_class, optarg, strlen(optarg)); 1968 u.u_flags |= F_CLASS; 1969 break; 1970 #endif 1971 case 'm': 1972 u.u_flags |= F_MKDIR; 1973 break; 1974 case 'o': 1975 u.u_flags |= F_DUPUID; 1976 break; 1977 #ifdef EXTENSIONS 1978 case 'p': 1979 memsave(&u.u_password, optarg, strlen(optarg)); 1980 u.u_flags |= F_PASSWORD; 1981 break; 1982 #endif 1983 case 's': 1984 memsave(&u.u_shell, optarg, strlen(optarg)); 1985 u.u_flags |= F_SHELL; 1986 break; 1987 case 'u': 1988 u.u_uid = check_numeric(optarg, "uid"); 1989 u.u_flags |= F_UID; 1990 break; 1991 #ifdef EXTENSIONS 1992 case 'v': 1993 verbose = 1; 1994 break; 1995 #endif 1996 default: 1997 usermgmt_usage("usermod"); 1998 /* NOTREACHED */ 1999 } 2000 } 2001 if ((u.u_flags & F_MKDIR) && !(u.u_flags & F_HOMEDIR) && 2002 !(u.u_flags & F_USERNAME)) { 2003 warnx("Option 'm' useless without 'd' or 'l' -- ignored"); 2004 u.u_flags &= ~F_MKDIR; 2005 } 2006 argc -= optind; 2007 argv += optind; 2008 if (argc != 1) { 2009 usermgmt_usage("usermod"); 2010 } 2011 checkeuid(); 2012 openlog("usermod", LOG_PID, LOG_USER); 2013 return moduser(*argv, (have_new_user) ? newuser : *argv, &u, 2014 u.u_allow_samba) ? EXIT_SUCCESS : EXIT_FAILURE; 2015 } 2016 2017 #ifdef EXTENSIONS 2018 #define DEL_OPT_EXTENSIONS "Dp:vS" 2019 #else 2020 #define DEL_OPT_EXTENSIONS 2021 #endif 2022 2023 int 2024 userdel(int argc, char **argv) 2025 { 2026 struct passwd *pwp; 2027 user_t u; 2028 char password[PasswordLength + 1]; 2029 int defaultfield; 2030 int rmhome; 2031 int bigD; 2032 int c; 2033 2034 (void)memset(&u, 0, sizeof(u)); 2035 read_defaults(&u); 2036 defaultfield = bigD = rmhome = 0; 2037 while ((c = getopt(argc, argv, "r" DEL_OPT_EXTENSIONS)) != -1) { 2038 switch(c) { 2039 #ifdef EXTENSIONS 2040 case 'D': 2041 bigD = 1; 2042 break; 2043 #endif 2044 #ifdef EXTENSIONS 2045 case 'S': 2046 u.u_allow_samba = 1; 2047 break; 2048 #endif 2049 #ifdef EXTENSIONS 2050 case 'p': 2051 defaultfield = 1; 2052 u.u_preserve = (strcmp(optarg, "true") == 0) ? 1 : 2053 (strcmp(optarg, "yes") == 0) ? 1 : 2054 atoi(optarg); 2055 break; 2056 #endif 2057 case 'r': 2058 rmhome = 1; 2059 break; 2060 #ifdef EXTENSIONS 2061 case 'v': 2062 verbose = 1; 2063 break; 2064 #endif 2065 default: 2066 usermgmt_usage("userdel"); 2067 /* NOTREACHED */ 2068 } 2069 } 2070 #ifdef EXTENSIONS 2071 if (bigD) { 2072 if (defaultfield) { 2073 checkeuid(); 2074 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 2075 } 2076 (void)printf("preserve\t%s\n", (u.u_preserve) ? "true" : 2077 "false"); 2078 return EXIT_SUCCESS; 2079 } 2080 #endif 2081 argc -= optind; 2082 argv += optind; 2083 if (argc != 1) { 2084 usermgmt_usage("userdel"); 2085 } 2086 checkeuid(); 2087 if ((pwp = getpwnam(*argv)) == NULL) { 2088 warnx("No such user `%s'", *argv); 2089 return EXIT_FAILURE; 2090 } 2091 if (rmhome) 2092 (void)removehomedir(pwp->pw_name, pwp->pw_uid, pwp->pw_dir); 2093 if (u.u_preserve) { 2094 u.u_flags |= F_SHELL; 2095 memsave(&u.u_shell, NOLOGIN, strlen(NOLOGIN)); 2096 (void)memset(password, '*', DES_Len); 2097 password[DES_Len] = 0; 2098 memsave(&u.u_password, password, strlen(password)); 2099 u.u_flags |= F_PASSWORD; 2100 openlog("userdel", LOG_PID, LOG_USER); 2101 return moduser(*argv, *argv, &u, u.u_allow_samba) ? 2102 EXIT_SUCCESS : EXIT_FAILURE; 2103 } 2104 if (!rm_user_from_groups(*argv)) { 2105 return 0; 2106 } 2107 openlog("userdel", LOG_PID, LOG_USER); 2108 return moduser(*argv, *argv, NULL, u.u_allow_samba) ? 2109 EXIT_SUCCESS : EXIT_FAILURE; 2110 } 2111 2112 #ifdef EXTENSIONS 2113 #define GROUP_ADD_OPT_EXTENSIONS "r:v" 2114 #else 2115 #define GROUP_ADD_OPT_EXTENSIONS 2116 #endif 2117 2118 /* add a group */ 2119 int 2120 groupadd(int argc, char **argv) 2121 { 2122 int dupgid; 2123 int gid; 2124 int c; 2125 int lowgid; 2126 int highgid; 2127 2128 gid = -1; 2129 dupgid = 0; 2130 lowgid = LowGid; 2131 highgid = HighGid; 2132 while ((c = getopt(argc, argv, "g:o" GROUP_ADD_OPT_EXTENSIONS)) != -1) { 2133 switch(c) { 2134 case 'g': 2135 gid = check_numeric(optarg, "gid"); 2136 break; 2137 case 'o': 2138 dupgid = 1; 2139 break; 2140 #ifdef EXTENSIONS 2141 case 'r': 2142 if (sscanf(optarg, "%d..%d", &lowgid, &highgid) != 2) { 2143 errx(EXIT_FAILURE, "Bad range `%s'", optarg); 2144 } 2145 break; 2146 case 'v': 2147 verbose = 1; 2148 break; 2149 #endif 2150 default: 2151 usermgmt_usage("groupadd"); 2152 /* NOTREACHED */ 2153 } 2154 } 2155 argc -= optind; 2156 argv += optind; 2157 if (argc != 1) { 2158 usermgmt_usage("groupadd"); 2159 } 2160 checkeuid(); 2161 if (gid < 0 && !getnextgid(&gid, lowgid, highgid)) { 2162 err(EXIT_FAILURE, "Can't add group: can't get next gid"); 2163 } 2164 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 2165 errx(EXIT_FAILURE, "Can't add group: gid %d is a duplicate", 2166 gid); 2167 } 2168 if (!valid_group(*argv)) { 2169 warnx("Invalid group name `%s'", *argv); 2170 } 2171 openlog("groupadd", LOG_PID, LOG_USER); 2172 if (!creategid(*argv, gid, "")) { 2173 errx(EXIT_FAILURE, "Can't add group: problems with %s file", 2174 _PATH_GROUP); 2175 } 2176 return EXIT_SUCCESS; 2177 } 2178 2179 #ifdef EXTENSIONS 2180 #define GROUP_DEL_OPT_EXTENSIONS "v" 2181 #else 2182 #define GROUP_DEL_OPT_EXTENSIONS 2183 #endif 2184 2185 /* remove a group */ 2186 int 2187 groupdel(int argc, char **argv) 2188 { 2189 int c; 2190 2191 while ((c = getopt(argc, argv, "" GROUP_DEL_OPT_EXTENSIONS)) != -1) { 2192 switch(c) { 2193 #ifdef EXTENSIONS 2194 case 'v': 2195 verbose = 1; 2196 break; 2197 #endif 2198 default: 2199 usermgmt_usage("groupdel"); 2200 /* NOTREACHED */ 2201 } 2202 } 2203 argc -= optind; 2204 argv += optind; 2205 if (argc != 1) { 2206 usermgmt_usage("groupdel"); 2207 } 2208 if (getgrnam(*argv) == NULL) { 2209 errx(EXIT_FAILURE, "No such group `%s'", *argv); 2210 } 2211 checkeuid(); 2212 openlog("groupdel", LOG_PID, LOG_USER); 2213 if (!modify_gid(*argv, NULL)) { 2214 errx(EXIT_FAILURE, "Can't change `%s' file", _PATH_GROUP); 2215 } 2216 return EXIT_SUCCESS; 2217 } 2218 2219 #ifdef EXTENSIONS 2220 #define GROUP_MOD_OPT_EXTENSIONS "v" 2221 #else 2222 #define GROUP_MOD_OPT_EXTENSIONS 2223 #endif 2224 2225 /* modify a group */ 2226 int 2227 groupmod(int argc, char **argv) 2228 { 2229 struct group *grp; 2230 char buf[MaxEntryLen]; 2231 char *newname; 2232 char **cpp; 2233 int dupgid; 2234 int gid; 2235 int cc; 2236 int c; 2237 2238 gid = -1; 2239 dupgid = 0; 2240 newname = NULL; 2241 while ((c = getopt(argc, argv, "g:on:" GROUP_MOD_OPT_EXTENSIONS)) != -1) { 2242 switch(c) { 2243 case 'g': 2244 gid = check_numeric(optarg, "gid"); 2245 break; 2246 case 'o': 2247 dupgid = 1; 2248 break; 2249 case 'n': 2250 memsave(&newname, optarg, strlen(optarg)); 2251 break; 2252 #ifdef EXTENSIONS 2253 case 'v': 2254 verbose = 1; 2255 break; 2256 #endif 2257 default: 2258 usermgmt_usage("groupmod"); 2259 /* NOTREACHED */ 2260 } 2261 } 2262 argc -= optind; 2263 argv += optind; 2264 if (argc != 1) { 2265 usermgmt_usage("groupmod"); 2266 } 2267 checkeuid(); 2268 if (gid < 0 && newname == NULL) { 2269 errx(EXIT_FAILURE, "Nothing to change"); 2270 } 2271 if (dupgid && gid < 0) { 2272 errx(EXIT_FAILURE, "Duplicate which gid?"); 2273 } 2274 if ((grp = find_group_info(*argv)) == NULL) { 2275 errx(EXIT_FAILURE, "Can't find group `%s' to modify", *argv); 2276 } 2277 if (!is_local(*argv, _PATH_GROUP)) { 2278 errx(EXIT_FAILURE, "Group `%s' must be a local group", *argv); 2279 } 2280 if (newname != NULL && !valid_group(newname)) { 2281 warnx("Invalid group name `%s'", newname); 2282 } 2283 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:", 2284 (newname) ? newname : grp->gr_name, 2285 grp->gr_passwd, 2286 (gid < 0) ? grp->gr_gid : gid); 2287 for (cpp = grp->gr_mem ; *cpp && cc < sizeof(buf) ; cpp++) { 2288 cc += snprintf(&buf[cc], sizeof(buf) - cc, "%s%s", *cpp, 2289 (cpp[1] == NULL) ? "" : ","); 2290 } 2291 cc += snprintf(&buf[cc], sizeof(buf) - cc, "\n"); 2292 openlog("groupmod", LOG_PID, LOG_USER); 2293 if (!modify_gid(*argv, buf)) { 2294 errx(EXIT_FAILURE, "Can't change %s file", _PATH_GROUP); 2295 } 2296 return EXIT_SUCCESS; 2297 } 2298 2299 #ifdef EXTENSIONS 2300 /* display user information */ 2301 int 2302 userinfo(int argc, char **argv) 2303 { 2304 struct passwd *pwp; 2305 struct group *grp; 2306 char buf[MaxEntryLen]; 2307 char **cpp; 2308 int exists; 2309 int cc; 2310 int i; 2311 2312 exists = 0; 2313 while ((i = getopt(argc, argv, "ev")) != -1) { 2314 switch(i) { 2315 case 'e': 2316 exists = 1; 2317 break; 2318 case 'v': 2319 verbose = 1; 2320 break; 2321 default: 2322 usermgmt_usage("userinfo"); 2323 /* NOTREACHED */ 2324 } 2325 } 2326 argc -= optind; 2327 argv += optind; 2328 if (argc != 1) { 2329 usermgmt_usage("userinfo"); 2330 } 2331 pwp = find_user_info(*argv); 2332 if (exists) { 2333 exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE); 2334 } 2335 if (pwp == NULL) { 2336 errx(EXIT_FAILURE, "Can't find user `%s'", *argv); 2337 } 2338 (void)printf("login\t%s\n", pwp->pw_name); 2339 (void)printf("passwd\t%s\n", pwp->pw_passwd); 2340 (void)printf("uid\t%d\n", pwp->pw_uid); 2341 for (cc = 0 ; (grp = getgrent()) != NULL ; ) { 2342 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2343 if (strcmp(*cpp, *argv) == 0 && 2344 grp->gr_gid != pwp->pw_gid) { 2345 cc += snprintf(&buf[cc], sizeof(buf) - cc, 2346 "%s ", grp->gr_name); 2347 } 2348 } 2349 } 2350 if ((grp = getgrgid(pwp->pw_gid)) == NULL) { 2351 (void)printf("groups\t%d %s\n", pwp->pw_gid, buf); 2352 } else { 2353 (void)printf("groups\t%s %s\n", grp->gr_name, buf); 2354 } 2355 (void)printf("change\t%s", pwp->pw_change ? 2356 ctime(&pwp->pw_change) : "NEVER\n"); 2357 #ifdef EXTENSIONS 2358 (void)printf("class\t%s\n", pwp->pw_class); 2359 #endif 2360 (void)printf("gecos\t%s\n", pwp->pw_gecos); 2361 (void)printf("dir\t%s\n", pwp->pw_dir); 2362 (void)printf("shell\t%s\n", pwp->pw_shell); 2363 (void)printf("expire\t%s", pwp->pw_expire ? 2364 ctime(&pwp->pw_expire) : "NEVER\n"); 2365 return EXIT_SUCCESS; 2366 } 2367 #endif 2368 2369 #ifdef EXTENSIONS 2370 /* display user information */ 2371 int 2372 groupinfo(int argc, char **argv) 2373 { 2374 struct group *grp; 2375 char **cpp; 2376 int exists; 2377 int i; 2378 2379 exists = 0; 2380 while ((i = getopt(argc, argv, "ev")) != -1) { 2381 switch(i) { 2382 case 'e': 2383 exists = 1; 2384 break; 2385 case 'v': 2386 verbose = 1; 2387 break; 2388 default: 2389 usermgmt_usage("groupinfo"); 2390 /* NOTREACHED */ 2391 } 2392 } 2393 argc -= optind; 2394 argv += optind; 2395 if (argc != 1) { 2396 usermgmt_usage("groupinfo"); 2397 } 2398 grp = find_group_info(*argv); 2399 if (exists) { 2400 exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE); 2401 } 2402 if (grp == NULL) { 2403 errx(EXIT_FAILURE, "Can't find group `%s'", *argv); 2404 } 2405 (void)printf("name\t%s\n", grp->gr_name); 2406 (void)printf("passwd\t%s\n", grp->gr_passwd); 2407 (void)printf("gid\t%d\n", grp->gr_gid); 2408 (void)printf("members\t"); 2409 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2410 (void)printf("%s", *cpp); 2411 if (*(cpp + 1)) 2412 (void) printf(", "); 2413 } 2414 (void)fputc('\n', stdout); 2415 return EXIT_SUCCESS; 2416 } 2417 #endif 2418
Indexes created Fri Sep 26 20:09:58 GMT 2025