1 /* $NetBSD: user.c,v 1.86 2005/07/30 15:06:43 christos 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 1.86 2005/07/30 15:06:43 christos 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@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 1006 *tp = 0; 1007 if (s != NULL) { 1008 (void)memset(&tm, 0, sizeof(tm)); 1009 if (strptime(s, "%c", &tm) != NULL) { 1010 *tp = mktime(&tm); 1011 } else if (strptime(s, "%B %d %Y", &tm) != NULL) { 1012 *tp = mktime(&tm); 1013 } else if (isdigit((unsigned char) *s)) { 1014 *tp = atoi(s); 1015 } else { 1016 return 0; 1017 } 1018 } 1019 return 1; 1020 } 1021 1022 /* add a user */ 1023 static int 1024 adduser(char *login_name, user_t *up) 1025 { 1026 struct group *grp; 1027 struct stat st; 1028 time_t expire; 1029 time_t inactive; 1030 char password[PasswordLength + 1]; 1031 char home[MaxFileNameLen]; 1032 char buf[MaxFileNameLen]; 1033 int sync_uid_gid; 1034 int masterfd; 1035 int ptmpfd; 1036 int gid; 1037 int cc; 1038 int i; 1039 1040 if (!valid_login(login_name, up->u_allow_samba)) { 1041 errx(EXIT_FAILURE, "`%s' is not a valid login name", login_name); 1042 } 1043 #ifdef EXTENSIONS 1044 if (!valid_class(up->u_class)) { 1045 errx(EXIT_FAILURE, "No such login class `%s'", up->u_class); 1046 } 1047 #endif 1048 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1049 err(EXIT_FAILURE, "Can't open `%s'", _PATH_MASTERPASSWD); 1050 } 1051 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1052 err(EXIT_FAILURE, "Can't lock `%s'", _PATH_MASTERPASSWD); 1053 } 1054 pw_init(); 1055 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1056 int serrno = errno; 1057 (void)close(masterfd); 1058 errno = serrno; 1059 err(EXIT_FAILURE, "Can't obtain pw_lock"); 1060 } 1061 while ((cc = read(masterfd, buf, sizeof(buf))) > 0) { 1062 if (write(ptmpfd, buf, (size_t)(cc)) != cc) { 1063 int serrno = errno; 1064 (void)close(masterfd); 1065 (void)close(ptmpfd); 1066 (void)pw_abort(); 1067 errno = serrno; 1068 err(EXIT_FAILURE, "Short write to /etc/ptmp " 1069 "(not %d chars)", cc); 1070 } 1071 } 1072 /* if no uid was specified, get next one in [low_uid..high_uid] range */ 1073 sync_uid_gid = (strcmp(up->u_primgrp, "=uid") == 0); 1074 if (up->u_uid == -1) { 1075 int got_id = 0; 1076 1077 /* 1078 * Look for a free UID in the command line ranges (if any). 1079 * These start after the ranges specified in the config file. 1080 */ 1081 for (i = up->u_defrc; !got_id && i < up->u_rc ; i++) { 1082 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1083 up->u_rv[i].r_from, up->u_rv[i].r_to); 1084 } 1085 /* 1086 * If there were no free UIDs in the command line ranges, 1087 * try the ranges from the config file (there will always 1088 * be at least one default). 1089 */ 1090 for (i = 0; !got_id && i < up->u_defrc; i++) { 1091 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1092 up->u_rv[i].r_from, up->u_rv[i].r_to); 1093 } 1094 if (!got_id) { 1095 (void)close(ptmpfd); 1096 (void)pw_abort(); 1097 errx(EXIT_FAILURE, "can't get next uid for %d", 1098 up->u_uid); 1099 } 1100 } 1101 /* check uid isn't already allocated */ 1102 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1103 (void)close(ptmpfd); 1104 (void)pw_abort(); 1105 errx(EXIT_FAILURE, "uid %d is already in use", up->u_uid); 1106 } 1107 /* if -g=uid was specified, check gid is unused */ 1108 if (sync_uid_gid) { 1109 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1110 (void)close(ptmpfd); 1111 (void)pw_abort(); 1112 errx(EXIT_FAILURE, "gid %d is already in use", 1113 up->u_uid); 1114 } 1115 gid = up->u_uid; 1116 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1117 gid = grp->gr_gid; 1118 } else if (is_number(up->u_primgrp) && 1119 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1120 gid = grp->gr_gid; 1121 } else { 1122 (void)close(ptmpfd); 1123 (void)pw_abort(); 1124 errx(EXIT_FAILURE, "group %s not found", up->u_primgrp); 1125 } 1126 /* check name isn't already in use */ 1127 if (!(up->u_flags & F_DUPUID) && getpwnam(login_name) != NULL) { 1128 (void)close(ptmpfd); 1129 (void)pw_abort(); 1130 errx(EXIT_FAILURE, "already a `%s' user", login_name); 1131 } 1132 if (up->u_flags & F_HOMEDIR) { 1133 (void)strlcpy(home, up->u_home, sizeof(home)); 1134 } else { 1135 /* if home directory hasn't been given, make it up */ 1136 (void)snprintf(home, sizeof(home), "%s/%s", up->u_basedir, 1137 login_name); 1138 } 1139 if (!scantime(&inactive, up->u_inactive)) { 1140 warnx("Warning: inactive time `%s' invalid, account expiry off", 1141 up->u_inactive); 1142 } 1143 if (!scantime(&expire, up->u_expire)) { 1144 warnx("Warning: expire time `%s' invalid, password expiry off", 1145 up->u_expire); 1146 } 1147 if (lstat(home, &st) < 0 && !(up->u_flags & F_MKDIR)) { 1148 warnx("Warning: home directory `%s' doesn't exist, " 1149 "and -m was not specified", home); 1150 } 1151 password[sizeof(password) - 1] = '\0'; 1152 if (up->u_password != NULL && valid_password_length(up->u_password)) { 1153 (void)strlcpy(password, up->u_password, sizeof(password)); 1154 } else { 1155 (void)memset(password, '*', DES_Len); 1156 password[DES_Len] = 0; 1157 if (up->u_password != NULL) { 1158 warnx("Password `%s' is invalid: setting it to `%s'", 1159 up->u_password, password); 1160 } 1161 } 1162 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1163 login_name, 1164 password, 1165 up->u_uid, 1166 gid, 1167 #ifdef EXTENSIONS 1168 up->u_class, 1169 #else 1170 "", 1171 #endif 1172 (long) inactive, 1173 (long) expire, 1174 up->u_comment, 1175 home, 1176 up->u_shell); 1177 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1178 int serrno = errno; 1179 (void)close(ptmpfd); 1180 (void)pw_abort(); 1181 errno = serrno; 1182 err(EXIT_FAILURE, "Can't add `%s'", buf); 1183 } 1184 if (up->u_flags & F_MKDIR) { 1185 if (lstat(home, &st) == 0) { 1186 (void)close(ptmpfd); 1187 (void)pw_abort(); 1188 errx(EXIT_FAILURE, 1189 "Home directory `%s' already exists", home); 1190 } else { 1191 if (asystem("%s -p %s", MKDIR, home) != 0) { 1192 int serrno = errno; 1193 (void)close(ptmpfd); 1194 (void)pw_abort(); 1195 errno = serrno; 1196 err(EXIT_FAILURE, "Can't mkdir `%s'", home); 1197 } 1198 (void)copydotfiles(up->u_skeldir, up->u_uid, gid, home); 1199 } 1200 } 1201 if (strcmp(up->u_primgrp, "=uid") == 0 && 1202 getgrnam(login_name) == NULL && 1203 !creategid(login_name, gid, login_name)) { 1204 (void)close(ptmpfd); 1205 (void)pw_abort(); 1206 errx(EXIT_FAILURE, "Can't create gid %d for login name %s", 1207 gid, login_name); 1208 } 1209 if (up->u_groupc > 0 && 1210 !append_group(login_name, up->u_groupc, up->u_groupv)) { 1211 (void)close(ptmpfd); 1212 (void)pw_abort(); 1213 errx(EXIT_FAILURE, "Can't append `%s' to new groups", 1214 login_name); 1215 } 1216 (void)close(ptmpfd); 1217 #if PW_MKDB_ARGC == 2 1218 if (pw_mkdb(login_name, 0) < 0) 1219 #else 1220 if (pw_mkdb() < 0) 1221 #endif 1222 { 1223 (void)pw_abort(); 1224 errx(EXIT_FAILURE, "pw_mkdb failed"); 1225 } 1226 syslog(LOG_INFO, "New user added: name=%s, uid=%d, gid=%d, home=%s, " 1227 "shell=%s", login_name, up->u_uid, gid, home, up->u_shell); 1228 return 1; 1229 } 1230 1231 /* remove a user from the groups file */ 1232 static int 1233 rm_user_from_groups(char *login_name) 1234 { 1235 struct stat st; 1236 regmatch_t matchv[10]; 1237 regex_t r; 1238 FILE *from; 1239 FILE *to; 1240 char line[MaxEntryLen]; 1241 char buf[MaxEntryLen]; 1242 char f[MaxFileNameLen]; 1243 int fd; 1244 int cc; 1245 int sc; 1246 1247 (void)snprintf(line, sizeof(line), "(:|,)(%s)(,|$)", login_name); 1248 if ((sc = regcomp(&r, line, REG_EXTENDED|REG_NEWLINE)) != 0) { 1249 (void)regerror(sc, &r, buf, sizeof(buf)); 1250 warnx("Can't compile regular expression `%s' (%s)", line, 1251 buf); 1252 return 0; 1253 } 1254 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 1255 warn("Can't remove gid for `%s': can't open `%s'", 1256 login_name, _PATH_GROUP); 1257 return 0; 1258 } 1259 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 1260 warn("can't lock `%s'", _PATH_GROUP); 1261 } 1262 (void)fstat(fileno(from), &st); 1263 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 1264 if ((fd = mkstemp(f)) < 0) { 1265 warn("Can't create gid: mkstemp failed"); 1266 (void)fclose(from); 1267 return 0; 1268 } 1269 if ((to = fdopen(fd, "w")) == NULL) { 1270 warn("Can't create gid: fdopen `%s' failed", f); 1271 (void)fclose(from); 1272 (void)close(fd); 1273 (void)unlink(f); 1274 return 0; 1275 } 1276 while (fgets(buf, sizeof(buf), from) != NULL) { 1277 cc = strlen(buf); 1278 if (regexec(&r, buf, 10, matchv, 0) == 0) { 1279 if (buf[(int)matchv[1].rm_so] == ',') { 1280 matchv[2].rm_so = matchv[1].rm_so; 1281 } else if (matchv[2].rm_eo != matchv[3].rm_eo) { 1282 matchv[2].rm_eo = matchv[3].rm_eo; 1283 } 1284 cc -= (int) matchv[2].rm_eo; 1285 sc = (int) matchv[2].rm_so; 1286 if (fwrite(buf, sizeof(char), (size_t)sc, to) != sc || 1287 fwrite(&buf[(int)matchv[2].rm_eo], sizeof(char), 1288 (size_t)cc, to) != cc) { 1289 warn("Can't create gid: short write to `%s'", 1290 f); 1291 (void)fclose(from); 1292 (void)close(fd); 1293 (void)unlink(f); 1294 return 0; 1295 } 1296 } else if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 1297 warn("Can't create gid: short write to `%s'", f); 1298 (void)fclose(from); 1299 (void)close(fd); 1300 (void)unlink(f); 1301 return 0; 1302 } 1303 } 1304 (void)fclose(from); 1305 (void)fclose(to); 1306 if (rename(f, _PATH_GROUP) < 0) { 1307 warn("Can't create gid: can't rename `%s' to `%s'", 1308 f, _PATH_GROUP); 1309 (void)unlink(f); 1310 return 0; 1311 } 1312 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 1313 return 1; 1314 } 1315 1316 /* check that the user or group is local, not from YP/NIS */ 1317 static int 1318 is_local(char *name, const char *file) 1319 { 1320 FILE *fp; 1321 char buf[MaxEntryLen]; 1322 size_t len; 1323 int ret; 1324 1325 if ((fp = fopen(file, "r")) == NULL) { 1326 err(EXIT_FAILURE, "Can't open `%s'", file); 1327 } 1328 len = strlen(name); 1329 for (ret = 0 ; fgets(buf, sizeof(buf), fp) != NULL ; ) { 1330 if (strncmp(buf, name, len) == 0 && buf[len] == ':') { 1331 ret = 1; 1332 break; 1333 } 1334 } 1335 (void)fclose(fp); 1336 return ret; 1337 } 1338 1339 /* modify a user */ 1340 static int 1341 moduser(char *login_name, char *newlogin, user_t *up, int allow_samba) 1342 { 1343 struct passwd *pwp; 1344 struct group *grp; 1345 const char *homedir; 1346 char *locked_pwd; 1347 size_t colonc; 1348 size_t loginc; 1349 size_t len; 1350 size_t cc; 1351 FILE *master; 1352 char newdir[MaxFileNameLen]; 1353 char buf[MaxEntryLen]; 1354 char *colon; 1355 int masterfd; 1356 int ptmpfd; 1357 int error; 1358 1359 if (!valid_login(newlogin, allow_samba)) { 1360 errx(EXIT_FAILURE, "`%s' is not a valid login name", 1361 login_name); 1362 } 1363 if ((pwp = getpwnam(login_name)) == NULL) { 1364 errx(EXIT_FAILURE, "No such user `%s'", login_name); 1365 } 1366 if (!is_local(login_name, _PATH_MASTERPASSWD)) { 1367 errx(EXIT_FAILURE, "User `%s' must be a local user", 1368 login_name); 1369 } 1370 /* keep dir name in case we need it for '-m' */ 1371 homedir = pwp->pw_dir; 1372 1373 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1374 err(EXIT_FAILURE, "Can't open `%s'", _PATH_MASTERPASSWD); 1375 } 1376 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1377 err(EXIT_FAILURE, "Can't lock `%s'", _PATH_MASTERPASSWD); 1378 } 1379 pw_init(); 1380 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1381 int serrno = errno; 1382 (void)close(masterfd); 1383 errno = serrno; 1384 err(EXIT_FAILURE, "Can't obtain pw_lock"); 1385 } 1386 if ((master = fdopen(masterfd, "r")) == NULL) { 1387 int serrno = errno; 1388 (void)close(masterfd); 1389 (void)close(ptmpfd); 1390 (void)pw_abort(); 1391 errno = serrno; 1392 err(EXIT_FAILURE, "Can't fdopen fd for %s", _PATH_MASTERPASSWD); 1393 } 1394 if (up != NULL) { 1395 if (up->u_flags & F_USERNAME) { 1396 /* 1397 * If changing name, 1398 * check new name isn't already in use 1399 */ 1400 if (strcmp(login_name, newlogin) != 0 && 1401 getpwnam(newlogin) != NULL) { 1402 (void)close(ptmpfd); 1403 (void)pw_abort(); 1404 errx(EXIT_FAILURE, "Already a `%s' user", 1405 newlogin); 1406 } 1407 pwp->pw_name = newlogin; 1408 1409 /* 1410 * Provide a new directory name in case the 1411 * home directory is to be moved. 1412 */ 1413 if (up->u_flags & F_MKDIR) { 1414 (void)snprintf(newdir, sizeof(newdir), "%s/%s", 1415 up->u_basedir, newlogin); 1416 pwp->pw_dir = newdir; 1417 } 1418 } 1419 if (up->u_flags & F_PASSWORD) { 1420 if (up->u_password != NULL) { 1421 if (!valid_password_length(up->u_password)) { 1422 (void)close(ptmpfd); 1423 (void)pw_abort(); 1424 errx(EXIT_FAILURE, 1425 "Invalid password: `%s'", 1426 up->u_password); 1427 } 1428 if ((locked_pwd = 1429 strstr(pwp->pw_passwd, LOCKED)) != NULL) { 1430 /* 1431 * account is locked - keep it locked 1432 * and just change the password. 1433 */ 1434 if (asprintf(&locked_pwd, "%s%s", 1435 LOCKED, up->u_password) == -1) 1436 err(EXIT_FAILURE, 1437 "asprintf failed"); 1438 pwp->pw_passwd = locked_pwd; 1439 } else 1440 pwp->pw_passwd = up->u_password; 1441 } 1442 } 1443 1444 /* check whether we should lock the account. */ 1445 if (up->u_locked == LOCK) { 1446 /* check to see account if already locked. */ 1447 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1448 != NULL) 1449 warnx("Account is already locked"); 1450 else { 1451 if (asprintf(&locked_pwd, "%s%s", LOCKED, 1452 pwp->pw_passwd) == -1) 1453 err(EXIT_FAILURE, "asprintf failed"); 1454 pwp->pw_passwd = locked_pwd; 1455 } 1456 } else if (up->u_locked == UNLOCK) { 1457 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1458 == NULL) 1459 warnx("Account '%s' is not locked", login_name); 1460 else 1461 pwp->pw_passwd = locked_pwd + strlen(LOCKED); 1462 } 1463 1464 if (up->u_flags & F_UID) { 1465 /* check uid isn't already allocated */ 1466 if (!(up->u_flags & F_DUPUID) && 1467 getpwuid((uid_t)(up->u_uid)) != NULL) { 1468 (void)close(ptmpfd); 1469 (void)pw_abort(); 1470 errx(EXIT_FAILURE, "Uid %d is already in use", 1471 up->u_uid); 1472 } 1473 pwp->pw_uid = up->u_uid; 1474 } 1475 if (up->u_flags & F_GROUP) { 1476 /* if -g=uid was specified, check gid is unused */ 1477 if (strcmp(up->u_primgrp, "=uid") == 0) { 1478 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1479 (void)close(ptmpfd); 1480 (void)pw_abort(); 1481 errx(EXIT_FAILURE, 1482 "Gid %d is already in use", 1483 up->u_uid); 1484 } 1485 pwp->pw_gid = up->u_uid; 1486 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1487 pwp->pw_gid = grp->gr_gid; 1488 } else if (is_number(up->u_primgrp) && 1489 (grp = getgrgid( 1490 (gid_t)atoi(up->u_primgrp))) != NULL) { 1491 pwp->pw_gid = grp->gr_gid; 1492 } else { 1493 (void)close(ptmpfd); 1494 (void)pw_abort(); 1495 errx(EXIT_FAILURE, "Group %s not found", 1496 up->u_primgrp); 1497 } 1498 } 1499 if (up->u_flags & F_INACTIVE) { 1500 if (!scantime(&pwp->pw_change, up->u_inactive)) { 1501 warnx("Warning: inactive time `%s' invalid, " 1502 "password expiry off", 1503 up->u_inactive); 1504 } 1505 } 1506 if (up->u_flags & F_EXPIRE) { 1507 if (!scantime(&pwp->pw_expire, up->u_expire)) { 1508 warnx("Warning: expire time `%s' invalid, " 1509 "password expiry off", 1510 up->u_expire); 1511 } 1512 } 1513 if (up->u_flags & F_COMMENT) 1514 pwp->pw_gecos = up->u_comment; 1515 if (up->u_flags & F_HOMEDIR) 1516 pwp->pw_dir = up->u_home; 1517 if (up->u_flags & F_SHELL) 1518 pwp->pw_shell = up->u_shell; 1519 #ifdef EXTENSIONS 1520 if (up->u_flags & F_CLASS) { 1521 if (!valid_class(up->u_class)) { 1522 (void)close(ptmpfd); 1523 (void)pw_abort(); 1524 errx(EXIT_FAILURE, "No such login class `%s'", 1525 up->u_class); 1526 } 1527 pwp->pw_class = up->u_class; 1528 } 1529 #endif 1530 } 1531 loginc = strlen(login_name); 1532 while (fgets(buf, sizeof(buf), master) != NULL) { 1533 if ((colon = strchr(buf, ':')) == NULL) { 1534 warnx("Malformed entry `%s'. Skipping", buf); 1535 continue; 1536 } 1537 colonc = (size_t)(colon - buf); 1538 if (strncmp(login_name, buf, loginc) == 0 && loginc == colonc) { 1539 if (up != NULL) { 1540 len = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:" 1541 #ifdef EXTENSIONS 1542 "%s" 1543 #endif 1544 ":%ld:%ld:%s:%s:%s\n", 1545 newlogin, 1546 pwp->pw_passwd, 1547 pwp->pw_uid, 1548 pwp->pw_gid, 1549 #ifdef EXTENSIONS 1550 pwp->pw_class, 1551 #endif 1552 (long)pwp->pw_change, 1553 (long)pwp->pw_expire, 1554 pwp->pw_gecos, 1555 pwp->pw_dir, 1556 pwp->pw_shell); 1557 if (write(ptmpfd, buf, len) != len) { 1558 int serrno = errno; 1559 (void)close(ptmpfd); 1560 (void)pw_abort(); 1561 errno = serrno; 1562 err(EXIT_FAILURE, "Can't add `%s'", 1563 buf); 1564 } 1565 } 1566 } else { 1567 len = strlen(buf); 1568 if ((cc = write(ptmpfd, buf, len)) != len) { 1569 int serrno = errno; 1570 (void)close(masterfd); 1571 (void)close(ptmpfd); 1572 (void)pw_abort(); 1573 errno = serrno; 1574 err(EXIT_FAILURE, "Short write to /etc/ptmp " 1575 "(%ld not %ld chars)", 1576 (unsigned long)cc, 1577 (unsigned long)len); 1578 } 1579 } 1580 } 1581 if (up != NULL) { 1582 if ((up->u_flags & F_MKDIR) && 1583 asystem("%s %s %s", MV, homedir, pwp->pw_dir) != 0) { 1584 int serrno = errno; 1585 (void)close(ptmpfd); 1586 (void)pw_abort(); 1587 errno = serrno; 1588 err(EXIT_FAILURE, "Can't move `%s' to `%s'", 1589 homedir, pwp->pw_dir); 1590 } 1591 if (up->u_groupc > 0 && 1592 !append_group(newlogin, up->u_groupc, up->u_groupv)) { 1593 (void)close(ptmpfd); 1594 (void)pw_abort(); 1595 errx(EXIT_FAILURE, "Can't append `%s' to new groups", 1596 newlogin); 1597 } 1598 } 1599 (void)close(ptmpfd); 1600 #if PW_MKDB_ARGC == 2 1601 if (up != NULL && strcmp(login_name, newlogin) == 0) { 1602 error = pw_mkdb(login_name, 0); 1603 } else { 1604 error = pw_mkdb(NULL, 0); 1605 } 1606 #else 1607 error = pw_mkdb(); 1608 #endif 1609 if (error < 0) { 1610 (void)pw_abort(); 1611 errx(EXIT_FAILURE, "pw_mkdb failed"); 1612 } 1613 if (up == NULL) { 1614 syslog(LOG_INFO, "User removed: name=%s", login_name); 1615 } else if (strcmp(login_name, newlogin) == 0) { 1616 syslog(LOG_INFO, "User information modified: name=%s, uid=%d, " 1617 "gid=%d, home=%s, shell=%s", 1618 login_name, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, 1619 pwp->pw_shell); 1620 } else { 1621 syslog(LOG_INFO, "User information modified: name=%s, " 1622 "new name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1623 login_name, newlogin, pwp->pw_uid, pwp->pw_gid, 1624 pwp->pw_dir, pwp->pw_shell); 1625 } 1626 return 1; 1627 } 1628 1629 #ifdef EXTENSIONS 1630 /* see if we can find out the user struct */ 1631 static struct passwd * 1632 find_user_info(const char *name) 1633 { 1634 struct passwd *pwp; 1635 1636 if ((pwp = getpwnam(name)) != NULL) { 1637 return pwp; 1638 } 1639 if (is_number(name) && (pwp = getpwuid((uid_t)atoi(name))) != NULL) { 1640 return pwp; 1641 } 1642 return NULL; 1643 } 1644 #endif 1645 1646 #ifdef EXTENSIONS 1647 /* see if we can find out the group struct */ 1648 static struct group * 1649 find_group_info(const char *name) 1650 { 1651 struct group *grp; 1652 1653 if ((grp = getgrnam(name)) != NULL) { 1654 return grp; 1655 } 1656 if (is_number(name) && (grp = getgrgid((gid_t)atoi(name))) != NULL) { 1657 return grp; 1658 } 1659 return NULL; 1660 } 1661 #endif 1662 1663 /* print out usage message, and then exit */ 1664 void 1665 usermgmt_usage(const char *prog) 1666 { 1667 if (strcmp(prog, "useradd") == 0) { 1668 (void)fprintf(stderr, "usage: %s -D [-b basedir] [-e expiry] " 1669 "[-f inactive] [-g group]\n\t[-r lowuid..highuid] " 1670 "[-s shell] [-L class]\n", prog); 1671 (void)fprintf(stderr, "usage: %s [-G group] [-b basedir] " 1672 "[-c comment] [-d homedir] [-e expiry]\n\t[-f inactive] " 1673 "[-g group] [-k skeletondir] [-m] [-o] [-p password]\n" 1674 "\t[-r lowuid..highuid] [-s shell] [-u uid] [-v] user\n", 1675 prog); 1676 } else if (strcmp(prog, "usermod") == 0) { 1677 (void)fprintf(stderr, "usage: %s [-G group] [-c comment] " 1678 "[-C yes/no] [-d homedir] [-e expire] \n\t[-f inactive] " 1679 "[-g group] [-l newname] [-m] [-o] [-p password]\n" 1680 "\t[-s shell] [-u uid] [-L class] [-v] user\n", prog); 1681 } else if (strcmp(prog, "userdel") == 0) { 1682 (void)fprintf(stderr, "usage: %s -D [-p preserve]\n", prog); 1683 (void)fprintf(stderr, 1684 "usage: %s [-p preserve] [-r] [-v] user\n", prog); 1685 #ifdef EXTENSIONS 1686 } else if (strcmp(prog, "userinfo") == 0) { 1687 (void)fprintf(stderr, "usage: %s [-e] [-v] user\n", prog); 1688 #endif 1689 } else if (strcmp(prog, "groupadd") == 0) { 1690 (void)fprintf(stderr, "usage: %s [-g gid] [-o]" 1691 " [-r lowgid..highgid] [-v] group\n", prog); 1692 } else if (strcmp(prog, "groupdel") == 0) { 1693 (void)fprintf(stderr, "usage: %s [-v] group\n", prog); 1694 } else if (strcmp(prog, "groupmod") == 0) { 1695 (void)fprintf(stderr, 1696 "usage: %s [-g gid] [-o] [-n newname] [-v] group\n", prog); 1697 } else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) { 1698 (void)fprintf(stderr, 1699 "usage: %s ( add | del | mod | info ) ...\n", prog); 1700 #ifdef EXTENSIONS 1701 } else if (strcmp(prog, "groupinfo") == 0) { 1702 (void)fprintf(stderr, "usage: %s [-e] [-v] group\n", prog); 1703 #endif 1704 } 1705 exit(EXIT_FAILURE); 1706 /* NOTREACHED */ 1707 } 1708 1709 #ifdef EXTENSIONS 1710 #define ADD_OPT_EXTENSIONS "p:r:vL:S" 1711 #else 1712 #define ADD_OPT_EXTENSIONS 1713 #endif 1714 1715 int 1716 useradd(int argc, char **argv) 1717 { 1718 user_t u; 1719 int defaultfield; 1720 int bigD; 1721 int c; 1722 #ifdef EXTENSIONS 1723 int i; 1724 #endif 1725 1726 (void)memset(&u, 0, sizeof(u)); 1727 read_defaults(&u); 1728 u.u_uid = -1; 1729 defaultfield = bigD = 0; 1730 while ((c = getopt(argc, argv, "DG:b:c:d:e:f:g:k:mou:s:" 1731 ADD_OPT_EXTENSIONS)) != -1) { 1732 switch(c) { 1733 case 'D': 1734 bigD = 1; 1735 break; 1736 case 'G': 1737 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1738 u.u_groupc < NGROUPS_MAX) { 1739 if (u.u_groupv[u.u_groupc][0] != 0) { 1740 u.u_groupc++; 1741 } 1742 } 1743 if (optarg != NULL) { 1744 warnx("Truncated list of secondary groups " 1745 "to %d entries", NGROUPS_MAX); 1746 } 1747 break; 1748 #ifdef EXTENSIONS 1749 case 'S': 1750 u.u_allow_samba = 1; 1751 break; 1752 #endif 1753 case 'b': 1754 defaultfield = 1; 1755 memsave(&u.u_basedir, optarg, strlen(optarg)); 1756 break; 1757 case 'c': 1758 memsave(&u.u_comment, optarg, strlen(optarg)); 1759 break; 1760 case 'd': 1761 memsave(&u.u_home, optarg, strlen(optarg)); 1762 u.u_flags |= F_HOMEDIR; 1763 break; 1764 case 'e': 1765 defaultfield = 1; 1766 memsave(&u.u_expire, optarg, strlen(optarg)); 1767 break; 1768 case 'f': 1769 defaultfield = 1; 1770 memsave(&u.u_inactive, optarg, strlen(optarg)); 1771 break; 1772 case 'g': 1773 defaultfield = 1; 1774 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1775 break; 1776 case 'k': 1777 defaultfield = 1; 1778 memsave(&u.u_skeldir, optarg, strlen(optarg)); 1779 break; 1780 #ifdef EXTENSIONS 1781 case 'L': 1782 defaultfield = 1; 1783 memsave(&u.u_class, optarg, strlen(optarg)); 1784 break; 1785 #endif 1786 case 'm': 1787 u.u_flags |= F_MKDIR; 1788 break; 1789 case 'o': 1790 u.u_flags |= F_DUPUID; 1791 break; 1792 #ifdef EXTENSIONS 1793 case 'p': 1794 memsave(&u.u_password, optarg, strlen(optarg)); 1795 break; 1796 #endif 1797 #ifdef EXTENSIONS 1798 case 'r': 1799 defaultfield = 1; 1800 (void)save_range(&u, optarg); 1801 break; 1802 #endif 1803 case 's': 1804 defaultfield = 1; 1805 memsave(&u.u_shell, optarg, strlen(optarg)); 1806 break; 1807 case 'u': 1808 u.u_uid = check_numeric(optarg, "uid"); 1809 break; 1810 #ifdef EXTENSIONS 1811 case 'v': 1812 verbose = 1; 1813 break; 1814 #endif 1815 default: 1816 usermgmt_usage("useradd"); 1817 /* NOTREACHED */ 1818 } 1819 } 1820 if (bigD) { 1821 if (defaultfield) { 1822 checkeuid(); 1823 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1824 } 1825 (void)printf("group\t\t%s\n", u.u_primgrp); 1826 (void)printf("base_dir\t%s\n", u.u_basedir); 1827 (void)printf("skel_dir\t%s\n", u.u_skeldir); 1828 (void)printf("shell\t\t%s\n", u.u_shell); 1829 #ifdef EXTENSIONS 1830 (void)printf("class\t\t%s\n", u.u_class); 1831 #endif 1832 (void)printf("inactive\t%s\n", (u.u_inactive == NULL) ? 1833 UNSET_INACTIVE : u.u_inactive); 1834 (void)printf("expire\t\t%s\n", (u.u_expire == NULL) ? 1835 UNSET_EXPIRY : u.u_expire); 1836 #ifdef EXTENSIONS 1837 for (i = 0 ; i < u.u_rc ; i++) { 1838 (void)printf("range\t\t%d..%d\n", 1839 u.u_rv[i].r_from, u.u_rv[i].r_to); 1840 } 1841 #endif 1842 return EXIT_SUCCESS; 1843 } 1844 argc -= optind; 1845 argv += optind; 1846 if (argc != 1) { 1847 usermgmt_usage("useradd"); 1848 } 1849 checkeuid(); 1850 openlog("useradd", LOG_PID, LOG_USER); 1851 return adduser(*argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1852 } 1853 1854 #ifdef EXTENSIONS 1855 #define MOD_OPT_EXTENSIONS "p:vL:S" 1856 #else 1857 #define MOD_OPT_EXTENSIONS 1858 #endif 1859 1860 int 1861 usermod(int argc, char **argv) 1862 { 1863 user_t u; 1864 char newuser[MaxUserNameLen + 1]; 1865 int c, have_new_user; 1866 1867 (void)memset(&u, 0, sizeof(u)); 1868 (void)memset(newuser, 0, sizeof(newuser)); 1869 read_defaults(&u); 1870 have_new_user = 0; 1871 u.u_locked = -1; 1872 while ((c = getopt(argc, argv, "G:C:c:d:e:f:g:l:mos:u:" 1873 MOD_OPT_EXTENSIONS)) != -1) { 1874 switch(c) { 1875 case 'G': 1876 while ((u.u_groupv[u.u_groupc] = 1877 strsep(&optarg, ",")) != NULL && 1878 u.u_groupc < NGROUPS_MAX) { 1879 if (u.u_groupv[u.u_groupc][0] != 0) { 1880 u.u_groupc++; 1881 } 1882 } 1883 if (optarg != NULL) { 1884 warnx("Truncated list of secondary groups " 1885 "to %d entries", NGROUPS_MAX); 1886 } 1887 u.u_flags |= F_SECGROUP; 1888 break; 1889 #ifdef EXTENSIONS 1890 case 'S': 1891 u.u_allow_samba = 1; 1892 break; 1893 #endif 1894 case 'c': 1895 memsave(&u.u_comment, optarg, strlen(optarg)); 1896 u.u_flags |= F_COMMENT; 1897 break; 1898 case 'C': 1899 if (strcasecmp(optarg, "yes") == 0) 1900 u.u_locked = LOCK; 1901 else if (strcasecmp(optarg, "no") == 0) 1902 u.u_locked = UNLOCK; 1903 else 1904 /* No idea. */ 1905 errx(1, "Please type 'yes' or 'no'"); 1906 1907 break; 1908 case 'd': 1909 memsave(&u.u_home, optarg, strlen(optarg)); 1910 u.u_flags |= F_HOMEDIR; 1911 break; 1912 case 'e': 1913 memsave(&u.u_expire, optarg, strlen(optarg)); 1914 u.u_flags |= F_EXPIRE; 1915 break; 1916 case 'f': 1917 memsave(&u.u_inactive, optarg, strlen(optarg)); 1918 u.u_flags |= F_INACTIVE; 1919 break; 1920 case 'g': 1921 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1922 u.u_flags |= F_GROUP; 1923 break; 1924 case 'l': 1925 (void)strlcpy(newuser, optarg, sizeof(newuser)); 1926 have_new_user = 1; 1927 u.u_flags |= F_USERNAME; 1928 break; 1929 #ifdef EXTENSIONS 1930 case 'L': 1931 memsave(&u.u_class, optarg, strlen(optarg)); 1932 u.u_flags |= F_CLASS; 1933 break; 1934 #endif 1935 case 'm': 1936 u.u_flags |= F_MKDIR; 1937 break; 1938 case 'o': 1939 u.u_flags |= F_DUPUID; 1940 break; 1941 #ifdef EXTENSIONS 1942 case 'p': 1943 memsave(&u.u_password, optarg, strlen(optarg)); 1944 u.u_flags |= F_PASSWORD; 1945 break; 1946 #endif 1947 case 's': 1948 memsave(&u.u_shell, optarg, strlen(optarg)); 1949 u.u_flags |= F_SHELL; 1950 break; 1951 case 'u': 1952 u.u_uid = check_numeric(optarg, "uid"); 1953 u.u_flags |= F_UID; 1954 break; 1955 #ifdef EXTENSIONS 1956 case 'v': 1957 verbose = 1; 1958 break; 1959 #endif 1960 default: 1961 usermgmt_usage("usermod"); 1962 /* NOTREACHED */ 1963 } 1964 } 1965 if ((u.u_flags & F_MKDIR) && !(u.u_flags & F_HOMEDIR) && 1966 !(u.u_flags & F_USERNAME)) { 1967 warnx("Option 'm' useless without 'd' or 'l' -- ignored"); 1968 u.u_flags &= ~F_MKDIR; 1969 } 1970 argc -= optind; 1971 argv += optind; 1972 if (argc != 1) { 1973 usermgmt_usage("usermod"); 1974 } 1975 checkeuid(); 1976 openlog("usermod", LOG_PID, LOG_USER); 1977 return moduser(*argv, (have_new_user) ? newuser : *argv, &u, 1978 u.u_allow_samba) ? EXIT_SUCCESS : EXIT_FAILURE; 1979 } 1980 1981 #ifdef EXTENSIONS 1982 #define DEL_OPT_EXTENSIONS "Dp:vS" 1983 #else 1984 #define DEL_OPT_EXTENSIONS 1985 #endif 1986 1987 int 1988 userdel(int argc, char **argv) 1989 { 1990 struct passwd *pwp; 1991 user_t u; 1992 char password[PasswordLength + 1]; 1993 int defaultfield; 1994 int rmhome; 1995 int bigD; 1996 int c; 1997 1998 (void)memset(&u, 0, sizeof(u)); 1999 read_defaults(&u); 2000 defaultfield = bigD = rmhome = 0; 2001 while ((c = getopt(argc, argv, "r" DEL_OPT_EXTENSIONS)) != -1) { 2002 switch(c) { 2003 #ifdef EXTENSIONS 2004 case 'D': 2005 bigD = 1; 2006 break; 2007 #endif 2008 #ifdef EXTENSIONS 2009 case 'S': 2010 u.u_allow_samba = 1; 2011 break; 2012 #endif 2013 #ifdef EXTENSIONS 2014 case 'p': 2015 defaultfield = 1; 2016 u.u_preserve = (strcmp(optarg, "true") == 0) ? 1 : 2017 (strcmp(optarg, "yes") == 0) ? 1 : 2018 atoi(optarg); 2019 break; 2020 #endif 2021 case 'r': 2022 rmhome = 1; 2023 break; 2024 #ifdef EXTENSIONS 2025 case 'v': 2026 verbose = 1; 2027 break; 2028 #endif 2029 default: 2030 usermgmt_usage("userdel"); 2031 /* NOTREACHED */ 2032 } 2033 } 2034 #ifdef EXTENSIONS 2035 if (bigD) { 2036 if (defaultfield) { 2037 checkeuid(); 2038 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 2039 } 2040 (void)printf("preserve\t%s\n", (u.u_preserve) ? "true" : 2041 "false"); 2042 return EXIT_SUCCESS; 2043 } 2044 #endif 2045 argc -= optind; 2046 argv += optind; 2047 if (argc != 1) { 2048 usermgmt_usage("userdel"); 2049 } 2050 checkeuid(); 2051 if ((pwp = getpwnam(*argv)) == NULL) { 2052 warnx("No such user `%s'", *argv); 2053 return EXIT_FAILURE; 2054 } 2055 if (rmhome) 2056 (void)removehomedir(pwp->pw_name, pwp->pw_uid, pwp->pw_dir); 2057 if (u.u_preserve) { 2058 u.u_flags |= F_SHELL; 2059 memsave(&u.u_shell, NOLOGIN, strlen(NOLOGIN)); 2060 (void)memset(password, '*', DES_Len); 2061 password[DES_Len] = 0; 2062 memsave(&u.u_password, password, strlen(password)); 2063 u.u_flags |= F_PASSWORD; 2064 openlog("userdel", LOG_PID, LOG_USER); 2065 return moduser(*argv, *argv, &u, u.u_allow_samba) ? 2066 EXIT_SUCCESS : EXIT_FAILURE; 2067 } 2068 if (!rm_user_from_groups(*argv)) { 2069 return 0; 2070 } 2071 openlog("userdel", LOG_PID, LOG_USER); 2072 return moduser(*argv, *argv, NULL, u.u_allow_samba) ? 2073 EXIT_SUCCESS : EXIT_FAILURE; 2074 } 2075 2076 #ifdef EXTENSIONS 2077 #define GROUP_ADD_OPT_EXTENSIONS "r:v" 2078 #else 2079 #define GROUP_ADD_OPT_EXTENSIONS 2080 #endif 2081 2082 /* add a group */ 2083 int 2084 groupadd(int argc, char **argv) 2085 { 2086 int dupgid; 2087 int gid; 2088 int c; 2089 int lowgid; 2090 int highgid; 2091 2092 gid = -1; 2093 dupgid = 0; 2094 lowgid = LowGid; 2095 highgid = HighGid; 2096 while ((c = getopt(argc, argv, "g:o" GROUP_ADD_OPT_EXTENSIONS)) != -1) { 2097 switch(c) { 2098 case 'g': 2099 gid = check_numeric(optarg, "gid"); 2100 break; 2101 case 'o': 2102 dupgid = 1; 2103 break; 2104 #ifdef EXTENSIONS 2105 case 'r': 2106 if (sscanf(optarg, "%d..%d", &lowgid, &highgid) != 2) { 2107 errx(EXIT_FAILURE, "Bad range `%s'", optarg); 2108 } 2109 break; 2110 case 'v': 2111 verbose = 1; 2112 break; 2113 #endif 2114 default: 2115 usermgmt_usage("groupadd"); 2116 /* NOTREACHED */ 2117 } 2118 } 2119 argc -= optind; 2120 argv += optind; 2121 if (argc != 1) { 2122 usermgmt_usage("groupadd"); 2123 } 2124 checkeuid(); 2125 if (gid < 0 && !getnextgid(&gid, lowgid, highgid)) { 2126 err(EXIT_FAILURE, "Can't add group: can't get next gid"); 2127 } 2128 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 2129 errx(EXIT_FAILURE, "Can't add group: gid %d is a duplicate", 2130 gid); 2131 } 2132 if (!valid_group(*argv)) { 2133 warnx("Invalid group name `%s'", *argv); 2134 } 2135 openlog("groupadd", LOG_PID, LOG_USER); 2136 if (!creategid(*argv, gid, "")) { 2137 errx(EXIT_FAILURE, "Can't add group: problems with %s file", 2138 _PATH_GROUP); 2139 } 2140 return EXIT_SUCCESS; 2141 } 2142 2143 #ifdef EXTENSIONS 2144 #define GROUP_DEL_OPT_EXTENSIONS "v" 2145 #else 2146 #define GROUP_DEL_OPT_EXTENSIONS 2147 #endif 2148 2149 /* remove a group */ 2150 int 2151 groupdel(int argc, char **argv) 2152 { 2153 int c; 2154 2155 while ((c = getopt(argc, argv, "" GROUP_DEL_OPT_EXTENSIONS)) != -1) { 2156 switch(c) { 2157 #ifdef EXTENSIONS 2158 case 'v': 2159 verbose = 1; 2160 break; 2161 #endif 2162 default: 2163 usermgmt_usage("groupdel"); 2164 /* NOTREACHED */ 2165 } 2166 } 2167 argc -= optind; 2168 argv += optind; 2169 if (argc != 1) { 2170 usermgmt_usage("groupdel"); 2171 } 2172 if (getgrnam(*argv) == NULL) { 2173 errx(EXIT_FAILURE, "No such group `%s'", *argv); 2174 } 2175 checkeuid(); 2176 openlog("groupdel", LOG_PID, LOG_USER); 2177 if (!modify_gid(*argv, NULL)) { 2178 errx(EXIT_FAILURE, "Can't change `%s' file", _PATH_GROUP); 2179 } 2180 return EXIT_SUCCESS; 2181 } 2182 2183 #ifdef EXTENSIONS 2184 #define GROUP_MOD_OPT_EXTENSIONS "v" 2185 #else 2186 #define GROUP_MOD_OPT_EXTENSIONS 2187 #endif 2188 2189 /* modify a group */ 2190 int 2191 groupmod(int argc, char **argv) 2192 { 2193 struct group *grp; 2194 char buf[MaxEntryLen]; 2195 char *newname; 2196 char **cpp; 2197 int dupgid; 2198 int gid; 2199 int cc; 2200 int c; 2201 2202 gid = -1; 2203 dupgid = 0; 2204 newname = NULL; 2205 while ((c = getopt(argc, argv, "g:on:" GROUP_MOD_OPT_EXTENSIONS)) != -1) { 2206 switch(c) { 2207 case 'g': 2208 gid = check_numeric(optarg, "gid"); 2209 break; 2210 case 'o': 2211 dupgid = 1; 2212 break; 2213 case 'n': 2214 memsave(&newname, optarg, strlen(optarg)); 2215 break; 2216 #ifdef EXTENSIONS 2217 case 'v': 2218 verbose = 1; 2219 break; 2220 #endif 2221 default: 2222 usermgmt_usage("groupmod"); 2223 /* NOTREACHED */ 2224 } 2225 } 2226 argc -= optind; 2227 argv += optind; 2228 if (argc != 1) { 2229 usermgmt_usage("groupmod"); 2230 } 2231 checkeuid(); 2232 if (gid < 0 && newname == NULL) { 2233 errx(EXIT_FAILURE, "Nothing to change"); 2234 } 2235 if (dupgid && gid < 0) { 2236 errx(EXIT_FAILURE, "Duplicate which gid?"); 2237 } 2238 if ((grp = find_group_info(*argv)) == NULL) { 2239 errx(EXIT_FAILURE, "Can't find group `%s' to modify", *argv); 2240 } 2241 if (!is_local(*argv, _PATH_GROUP)) { 2242 errx(EXIT_FAILURE, "Group `%s' must be a local group", *argv); 2243 } 2244 if (newname != NULL && !valid_group(newname)) { 2245 warnx("Invalid group name `%s'", newname); 2246 } 2247 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:", 2248 (newname) ? newname : grp->gr_name, 2249 grp->gr_passwd, 2250 (gid < 0) ? grp->gr_gid : gid); 2251 for (cpp = grp->gr_mem ; *cpp && cc < sizeof(buf) ; cpp++) { 2252 cc += snprintf(&buf[cc], sizeof(buf) - cc, "%s%s", *cpp, 2253 (cpp[1] == NULL) ? "" : ","); 2254 } 2255 cc += snprintf(&buf[cc], sizeof(buf) - cc, "\n"); 2256 openlog("groupmod", LOG_PID, LOG_USER); 2257 if (!modify_gid(*argv, buf)) { 2258 errx(EXIT_FAILURE, "Can't change %s file", _PATH_GROUP); 2259 } 2260 return EXIT_SUCCESS; 2261 } 2262 2263 #ifdef EXTENSIONS 2264 /* display user information */ 2265 int 2266 userinfo(int argc, char **argv) 2267 { 2268 struct passwd *pwp; 2269 struct group *grp; 2270 char buf[MaxEntryLen]; 2271 char **cpp; 2272 int exists; 2273 int cc; 2274 int i; 2275 2276 exists = 0; 2277 while ((i = getopt(argc, argv, "ev")) != -1) { 2278 switch(i) { 2279 case 'e': 2280 exists = 1; 2281 break; 2282 case 'v': 2283 verbose = 1; 2284 break; 2285 default: 2286 usermgmt_usage("userinfo"); 2287 /* NOTREACHED */ 2288 } 2289 } 2290 argc -= optind; 2291 argv += optind; 2292 if (argc != 1) { 2293 usermgmt_usage("userinfo"); 2294 } 2295 pwp = find_user_info(*argv); 2296 if (exists) { 2297 exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE); 2298 } 2299 if (pwp == NULL) { 2300 errx(EXIT_FAILURE, "Can't find user `%s'", *argv); 2301 } 2302 (void)printf("login\t%s\n", pwp->pw_name); 2303 (void)printf("passwd\t%s\n", pwp->pw_passwd); 2304 (void)printf("uid\t%d\n", pwp->pw_uid); 2305 for (cc = 0 ; (grp = getgrent()) != NULL ; ) { 2306 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2307 if (strcmp(*cpp, *argv) == 0 && 2308 grp->gr_gid != pwp->pw_gid) { 2309 cc += snprintf(&buf[cc], sizeof(buf) - cc, 2310 "%s ", grp->gr_name); 2311 } 2312 } 2313 } 2314 if ((grp = getgrgid(pwp->pw_gid)) == NULL) { 2315 (void)printf("groups\t%d %s\n", pwp->pw_gid, buf); 2316 } else { 2317 (void)printf("groups\t%s %s\n", grp->gr_name, buf); 2318 } 2319 (void)printf("change\t%s", pwp->pw_change ? 2320 ctime(&pwp->pw_change) : "NEVER\n"); 2321 #ifdef EXTENSIONS 2322 (void)printf("class\t%s\n", pwp->pw_class); 2323 #endif 2324 (void)printf("gecos\t%s\n", pwp->pw_gecos); 2325 (void)printf("dir\t%s\n", pwp->pw_dir); 2326 (void)printf("shell\t%s\n", pwp->pw_shell); 2327 (void)printf("expire\t%s", pwp->pw_expire ? 2328 ctime(&pwp->pw_expire) : "NEVER\n"); 2329 return EXIT_SUCCESS; 2330 } 2331 #endif 2332 2333 #ifdef EXTENSIONS 2334 /* display user information */ 2335 int 2336 groupinfo(int argc, char **argv) 2337 { 2338 struct group *grp; 2339 char **cpp; 2340 int exists; 2341 int i; 2342 2343 exists = 0; 2344 while ((i = getopt(argc, argv, "ev")) != -1) { 2345 switch(i) { 2346 case 'e': 2347 exists = 1; 2348 break; 2349 case 'v': 2350 verbose = 1; 2351 break; 2352 default: 2353 usermgmt_usage("groupinfo"); 2354 /* NOTREACHED */ 2355 } 2356 } 2357 argc -= optind; 2358 argv += optind; 2359 if (argc != 1) { 2360 usermgmt_usage("groupinfo"); 2361 } 2362 grp = find_group_info(*argv); 2363 if (exists) { 2364 exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE); 2365 } 2366 if (grp == NULL) { 2367 errx(EXIT_FAILURE, "Can't find group `%s'", *argv); 2368 } 2369 (void)printf("name\t%s\n", grp->gr_name); 2370 (void)printf("passwd\t%s\n", grp->gr_passwd); 2371 (void)printf("gid\t%d\n", grp->gr_gid); 2372 (void)printf("members\t"); 2373 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2374 (void)printf("%s", *cpp); 2375 if (*(cpp + 1)) 2376 (void) printf(", "); 2377 } 2378 (void)fputc('\n', stdout); 2379 return EXIT_SUCCESS; 2380 } 2381 #endif 2382