user.c revision 1.93
1 /* $NetBSD: user.c,v 1.93 2005/09/18 21:41:26 agc 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 1.93 2005/09/18 21:41:26 agc 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 = LOGIN_NAME_MAX - 1, 178 MaxCommandLen = 2048, 179 MaxEntryLen = 2048, 180 PasswordLength = 2048, 181 182 DES_Len = 13, 183 184 LowGid = DEF_LOWUID, 185 HighGid = DEF_HIGHUID 186 }; 187 188 /* Full paths of programs used here */ 189 #define CHMOD "/bin/chmod" 190 #define CHOWN "/usr/sbin/chown" 191 #define MKDIR "/bin/mkdir" 192 #define MV "/bin/mv" 193 #define NOLOGIN "/sbin/nologin" 194 #define PAX "/bin/pax" 195 #define RM "/bin/rm" 196 197 #define UNSET_INACTIVE "Null (unset)" 198 #define UNSET_EXPIRY "Null (unset)" 199 200 static int asystem(const char *fmt, ...) 201 __attribute__((__format__(__printf__, 1, 2))); 202 static int is_number(const char *); 203 static struct group *find_group_info(const char *); 204 static int verbose; 205 206 static char * 207 skipspace(char *s) 208 { 209 for (; *s && isspace((unsigned char)*s) ; s++) { 210 } 211 return s; 212 } 213 214 static int 215 check_numeric(const char *val, const char *name) 216 { 217 if (!is_number(val)) { 218 errx(EXIT_FAILURE, "When using [-%c %s], " 219 "the %s must be numeric", *name, name, name); 220 } 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 struct group *grp_rm; 547 struct passwd *user_pwd; 548 549 /* 550 * Check that the group being removed 551 * isn't any user's Primary group. Just 552 * warn if it is. This could cause problems 553 * if the group GID was reused for a 554 * different purpose. 555 */ 556 557 grp_rm = find_group_info(group); 558 while ((user_pwd = getpwent()) != NULL) { 559 if (user_pwd->pw_gid == grp_rm->gr_gid) { 560 warnx("Warning: group `%s'(%d)" 561 " is the primary group of" 562 " `%s'. Use caution if you" 563 " later add this GID.", 564 grp_rm->gr_name, 565 grp_rm->gr_gid, user_pwd->pw_name); 566 } 567 } 568 endpwent(); 569 continue; 570 } else { 571 cc = strlen(newent); 572 (void)strlcpy(buf, newent, sizeof(buf)); 573 } 574 } 575 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 576 warn("Can't create gid: short write to `%s'", f); 577 (void)fclose(from); 578 (void)close(fd); 579 (void)unlink(f); 580 return 0; 581 } 582 } 583 (void)fclose(from); 584 (void)fclose(to); 585 if (rename(f, _PATH_GROUP) < 0) { 586 warn("Can't create gid: can't rename `%s' to `%s'", f, 587 _PATH_GROUP); 588 (void)unlink(f); 589 return 0; 590 } 591 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 592 if (newent == NULL) { 593 syslog(LOG_INFO, "group deleted: name=%s", group); 594 } else { 595 syslog(LOG_INFO, "group information modified: name=%s", group); 596 } 597 return 1; 598 } 599 600 /* modify the group entries for all `groups', by adding `user' */ 601 static int 602 append_group(char *user, int ngroups, const char **groups) 603 { 604 struct group *grp; 605 struct stat st; 606 FILE *from; 607 FILE *to; 608 char buf[MaxEntryLen]; 609 char f[MaxFileNameLen]; 610 char *colon; 611 int groupc; 612 int entc; 613 int fd; 614 int nc; 615 int cc; 616 int i; 617 int j; 618 619 for (i = 0 ; i < ngroups ; i++) { 620 if ((grp = getgrnam(groups[i])) == NULL) { 621 warnx("Can't append group `%s' for user `%s'", 622 groups[i], user); 623 } else { 624 for (j = 0 ; grp->gr_mem[j] ; j++) { 625 if (strcmp(user, grp->gr_mem[j]) == 0) { 626 /* already in it */ 627 groups[i] = ""; 628 } 629 } 630 } 631 } 632 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 633 warn("Can't append group for `%s': can't open `%s'", 634 user, _PATH_GROUP); 635 return 0; 636 } 637 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 638 warn("Can't lock `%s'", _PATH_GROUP); 639 } 640 (void)fstat(fileno(from), &st); 641 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 642 if ((fd = mkstemp(f)) < 0) { 643 warn("Can't create gid: mkstemp failed"); 644 (void)fclose(from); 645 return 0; 646 } 647 if ((to = fdopen(fd, "w")) == NULL) { 648 warn("Can't create gid: fdopen `%s' failed", f); 649 (void)fclose(from); 650 (void)close(fd); 651 (void)unlink(f); 652 return 0; 653 } 654 while (fgets(buf, sizeof(buf), from) != NULL) { 655 cc = strlen(buf); 656 if ((colon = strchr(buf, ':')) == NULL) { 657 warnx("Badly formed entry `%s'", buf); 658 continue; 659 } 660 entc = (int)(colon - buf); 661 for (i = 0 ; i < ngroups ; i++) { 662 if ((groupc = strlen(groups[i])) == 0) { 663 continue; 664 } 665 if (entc == groupc && 666 strncmp(groups[i], buf, (unsigned) entc) == 0) { 667 if ((nc = snprintf(&buf[cc - 1], 668 sizeof(buf) - cc + 1, "%s%s\n", 669 (buf[cc - 2] == ':') ? "" : ",", user)) < 0) { 670 warnx("Warning: group `%s' " 671 "entry too long", groups[i]); 672 } 673 cc += nc - 1; 674 } 675 } 676 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 677 warn("Can't create gid: short write to `%s'", f); 678 (void)fclose(from); 679 (void)close(fd); 680 (void)unlink(f); 681 return 0; 682 } 683 } 684 (void)fclose(from); 685 (void)fclose(to); 686 if (rename(f, _PATH_GROUP) < 0) { 687 warn("Can't create gid: can't rename `%s' to `%s'", 688 f, _PATH_GROUP); 689 (void)unlink(f); 690 return 0; 691 } 692 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 693 return 1; 694 } 695 696 /* the valid characters for login and group names */ 697 #define VALID_CHAR(c) (isalnum(c) || (c) == '.' || (c) == '_' || (c) == '-') 698 699 /* return 1 if `login' is a valid login name */ 700 static int 701 valid_login(char *login_name, int allow_samba) 702 { 703 unsigned char *cp; 704 705 /* First character of a login name cannot be '-'. */ 706 if (*login_name == '-') { 707 return 0; 708 } 709 if (strlen(login_name) >= LOGIN_NAME_MAX) { 710 return 0; 711 } 712 for (cp = (unsigned char *)login_name ; *cp ; cp++) { 713 if (!VALID_CHAR(*cp)) { 714 #ifdef EXTENSIONS 715 /* check for a trailing '$' in a Samba user name */ 716 if (allow_samba && *cp == '$' && *(cp + 1) == 0x0) { 717 return 1; 718 } 719 #endif 720 return 0; 721 } 722 } 723 return 1; 724 } 725 726 /* return 1 if `group' is a valid group name */ 727 static int 728 valid_group(char *group) 729 { 730 unsigned char *cp; 731 732 for (cp = (unsigned char *)group; *cp; cp++) { 733 if (!VALID_CHAR(*cp)) { 734 return 0; 735 } 736 } 737 return 1; 738 } 739 740 /* find the next gid in the range lo .. hi */ 741 static int 742 getnextgid(int *gidp, int lo, int hi) 743 { 744 for (*gidp = lo ; *gidp < hi ; *gidp += 1) { 745 if (getgrgid((gid_t)*gidp) == NULL) { 746 return 1; 747 } 748 } 749 return 0; 750 } 751 752 #ifdef EXTENSIONS 753 /* save a range of uids */ 754 static int 755 save_range(user_t *up, char *cp) 756 { 757 int from; 758 int to; 759 int i; 760 761 if (up->u_rsize == 0) { 762 up->u_rsize = 32; 763 NEWARRAY(range_t, up->u_rv, up->u_rsize, return(0)); 764 } else if (up->u_rc == up->u_rsize) { 765 up->u_rsize *= 2; 766 RENEW(range_t, up->u_rv, up->u_rsize, return(0)); 767 } 768 if (up->u_rv && sscanf(cp, "%d..%d", &from, &to) == 2) { 769 for (i = up->u_defrc ; i < up->u_rc ; i++) { 770 if (up->u_rv[i].r_from == from && 771 up->u_rv[i].r_to == to) { 772 break; 773 } 774 } 775 if (i == up->u_rc) { 776 up->u_rv[up->u_rc].r_from = from; 777 up->u_rv[up->u_rc].r_to = to; 778 up->u_rc += 1; 779 } 780 } else { 781 warnx("Bad range `%s'", cp); 782 return 0; 783 } 784 return 1; 785 } 786 #endif 787 788 /* set the defaults in the defaults file */ 789 static int 790 setdefaults(user_t *up) 791 { 792 char template[MaxFileNameLen]; 793 FILE *fp; 794 int ret; 795 int fd; 796 #ifdef EXTENSIONS 797 int i; 798 #endif 799 800 (void)snprintf(template, sizeof(template), "%s.XXXXXX", CONFFILE); 801 if ((fd = mkstemp(template)) < 0) { 802 warnx("Can't mkstemp `%s' for writing", CONFFILE); 803 return 0; 804 } 805 if ((fp = fdopen(fd, "w")) == NULL) { 806 warn("Can't fdopen `%s' for writing", CONFFILE); 807 return 0; 808 } 809 ret = 1; 810 if (fprintf(fp, "group\t\t%s\n", up->u_primgrp) <= 0 || 811 fprintf(fp, "base_dir\t%s\n", up->u_basedir) <= 0 || 812 fprintf(fp, "skel_dir\t%s\n", up->u_skeldir) <= 0 || 813 fprintf(fp, "shell\t\t%s\n", up->u_shell) <= 0 || 814 #ifdef EXTENSIONS 815 fprintf(fp, "class\t\t%s\n", up->u_class) <= 0 || 816 #endif 817 fprintf(fp, "inactive\t%s\n", (up->u_inactive == NULL) ? 818 UNSET_INACTIVE : up->u_inactive) <= 0 || 819 fprintf(fp, "expire\t\t%s\n", (up->u_expire == NULL) ? 820 UNSET_EXPIRY : up->u_expire) <= 0 || 821 fprintf(fp, "preserve\t%s\n", (up->u_preserve == 0) ? 822 "false" : "true") <= 0) { 823 warn("Can't write to `%s'", CONFFILE); 824 ret = 0; 825 } 826 #ifdef EXTENSIONS 827 for (i = (up->u_defrc != up->u_rc) ? up->u_defrc : 0; 828 i < up->u_rc ; i++) { 829 if (fprintf(fp, "range\t\t%d..%d\n", up->u_rv[i].r_from, 830 up->u_rv[i].r_to) <= 0) { 831 warn("Can't write to `%s'", CONFFILE); 832 ret = 0; 833 } 834 } 835 #endif 836 (void)fclose(fp); 837 if (ret) { 838 ret = ((rename(template, CONFFILE) == 0) && 839 (chmod(CONFFILE, 0644) == 0)); 840 } 841 return ret; 842 } 843 844 /* read the defaults file */ 845 static void 846 read_defaults(user_t *up) 847 { 848 struct stat st; 849 size_t lineno; 850 size_t len; 851 FILE *fp; 852 char *cp; 853 char *s; 854 855 memsave(&up->u_primgrp, DEF_GROUP, strlen(DEF_GROUP)); 856 memsave(&up->u_basedir, DEF_BASEDIR, strlen(DEF_BASEDIR)); 857 memsave(&up->u_skeldir, DEF_SKELDIR, strlen(DEF_SKELDIR)); 858 memsave(&up->u_shell, DEF_SHELL, strlen(DEF_SHELL)); 859 memsave(&up->u_comment, DEF_COMMENT, strlen(DEF_COMMENT)); 860 #ifdef EXTENSIONS 861 memsave(&up->u_class, DEF_CLASS, strlen(DEF_CLASS)); 862 #endif 863 up->u_rsize = 16; 864 up->u_defrc = 0; 865 NEWARRAY(range_t, up->u_rv, up->u_rsize, exit(1)); 866 up->u_inactive = DEF_INACTIVE; 867 up->u_expire = DEF_EXPIRE; 868 if ((fp = fopen(CONFFILE, "r")) == NULL) { 869 if (stat(CONFFILE, &st) < 0 && !setdefaults(up)) { 870 warn("Can't create `%s' defaults file", CONFFILE); 871 } 872 fp = fopen(CONFFILE, "r"); 873 } 874 if (fp != NULL) { 875 while ((s = fparseln(fp, &len, &lineno, NULL, 0)) != NULL) { 876 if (strncmp(s, "group", 5) == 0) { 877 cp = skipspace(s + 5); 878 memsave(&up->u_primgrp, (char *)cp, strlen(cp)); 879 } else if (strncmp(s, "base_dir", 8) == 0) { 880 cp = skipspace(s + 8); 881 memsave(&up->u_basedir, (char *)cp, strlen(cp)); 882 } else if (strncmp(s, "skel_dir", 8) == 0) { 883 cp = skipspace(s + 8); 884 memsave(&up->u_skeldir, (char *)cp, strlen(cp)); 885 } else if (strncmp(s, "shell", 5) == 0) { 886 cp = skipspace(s + 5); 887 memsave(&up->u_shell, cp, strlen(cp)); 888 #ifdef EXTENSIONS 889 } else if (strncmp((char *)s, "class", 5) == 0) { 890 cp = skipspace(s + 5); 891 memsave(&up->u_class, cp, strlen(cp)); 892 #endif 893 } else if (strncmp(s, "inactive", 8) == 0) { 894 cp = skipspace(s + 8); 895 if (strcmp(cp, UNSET_INACTIVE) == 0) { 896 if (up->u_inactive) { 897 FREE(up->u_inactive); 898 } 899 up->u_inactive = NULL; 900 } else { 901 memsave(&up->u_inactive, cp, strlen(cp)); 902 } 903 #ifdef EXTENSIONS 904 } else if (strncmp(s, "range", 5) == 0) { 905 cp = skipspace(s + 5); 906 (void)save_range(up, cp); 907 #endif 908 #ifdef EXTENSIONS 909 } else if (strncmp(s, "preserve", 8) == 0) { 910 cp = skipspace(s + 8); 911 up->u_preserve = 912 (strncmp(cp, "true", 4) == 0) ? 1 : 913 (strncmp(cp, "yes", 3) == 0) ? 1 : atoi(cp); 914 #endif 915 } else if (strncmp(s, "expire", 6) == 0) { 916 cp = skipspace(s + 6); 917 if (strcmp(cp, UNSET_EXPIRY) == 0) { 918 if (up->u_expire) { 919 FREE(up->u_expire); 920 } 921 up->u_expire = NULL; 922 } else { 923 memsave(&up->u_expire, cp, strlen(cp)); 924 } 925 } 926 (void)free(s); 927 } 928 (void)fclose(fp); 929 } 930 if (up->u_rc == 0) { 931 up->u_rv[up->u_rc].r_from = DEF_LOWUID; 932 up->u_rv[up->u_rc].r_to = DEF_HIGHUID; 933 up->u_rc += 1; 934 } 935 up->u_defrc = up->u_rc; 936 } 937 938 /* return the next valid unused uid */ 939 static int 940 getnextuid(int sync_uid_gid, int *uid, int low_uid, int high_uid) 941 { 942 for (*uid = low_uid ; *uid <= high_uid ; (*uid)++) { 943 if (getpwuid((uid_t)(*uid)) == NULL && *uid != NOBODY_UID) { 944 if (sync_uid_gid) { 945 if (getgrgid((gid_t)(*uid)) == NULL) { 946 return 1; 947 } 948 } else { 949 return 1; 950 } 951 } 952 } 953 return 0; 954 } 955 956 /* structure which defines a password type */ 957 typedef struct passwd_type_t { 958 const char *type; /* optional type descriptor */ 959 size_t desc_length; /* length of type descriptor */ 960 size_t length; /* length of password */ 961 const char *regex; /* regexp to output the password */ 962 size_t re_sub; /* subscript of regexp to use */ 963 } passwd_type_t; 964 965 static passwd_type_t passwd_types[] = { 966 { "$sha1", 5, 28, "\\$[^$]+\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* SHA1 */ 967 { "$2a", 3, 54, "\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* Blowfish */ 968 { "$1", 2, 34, NULL, 0 }, /* MD5 */ 969 { "", 0, DES_Len,NULL, 0 }, /* standard DES */ 970 { NULL, (size_t)~0, (size_t)~0, NULL, 0 } 971 /* none - terminate search */ 972 }; 973 974 /* return non-zero if it's a valid password - check length for cipher type */ 975 static int 976 valid_password_length(char *newpasswd) 977 { 978 passwd_type_t *pwtp; 979 regmatch_t matchv[10]; 980 regex_t r; 981 982 for (pwtp = passwd_types; pwtp->desc_length != (size_t)~0; pwtp++) { 983 if (strncmp(newpasswd, pwtp->type, pwtp->desc_length) == 0) { 984 if (pwtp->regex == NULL) { 985 return strlen(newpasswd) == pwtp->length; 986 } 987 (void)regcomp(&r, pwtp->regex, REG_EXTENDED); 988 if (regexec(&r, newpasswd, 10, matchv, 0) == 0) { 989 regfree(&r); 990 return (int)(matchv[pwtp->re_sub].rm_eo - 991 matchv[pwtp->re_sub].rm_so + 1) == 992 pwtp->length; 993 } 994 regfree(&r); 995 } 996 } 997 return 0; 998 } 999 1000 #ifdef EXTENSIONS 1001 static int 1002 valid_class(char *class) 1003 { 1004 login_cap_t *lc; 1005 1006 if (class == NULL || *class == '\0') { 1007 return 1; 1008 } 1009 /* 1010 * Check if /etc/login.conf exists. login_getclass() will 1011 * return 1 due to it not existing, so not informing the 1012 * user the actual login class does not exist. 1013 */ 1014 1015 if (access(PATH_LOGINCONF, R_OK) == -1) { 1016 warn("Access failed for `%s'; will not validate class `%s'", 1017 PATH_LOGINCONF, class); 1018 return 1; 1019 } 1020 1021 if ((lc = login_getclass(class)) != NULL) { 1022 login_close(lc); 1023 return 1; 1024 } 1025 return 0; 1026 } 1027 #endif 1028 1029 /* look for a valid time, return 0 if it was specified but bad */ 1030 static int 1031 scantime(time_t *tp, char *s) 1032 { 1033 struct tm tm; 1034 char *ep; 1035 long val; 1036 1037 *tp = 0; 1038 if (s != NULL) { 1039 (void)memset(&tm, 0, sizeof(tm)); 1040 if (strptime(s, "%c", &tm) != NULL) { 1041 *tp = mktime(&tm); 1042 return (*tp == -1) ? 0 : 1; 1043 } else if (strptime(s, "%B %d %Y", &tm) != NULL) { 1044 *tp = mktime(&tm); 1045 return (*tp == -1) ? 0 : 1; 1046 } else { 1047 errno = 0; 1048 *tp = val = strtol(s, &ep, 10); 1049 if (*ep != '\0' || *tp < -1 || errno == ERANGE) { 1050 *tp = 0; 1051 return 0; 1052 } 1053 if (*tp != val) { 1054 return 0; 1055 } 1056 } 1057 } 1058 return 1; 1059 } 1060 1061 /* add a user */ 1062 static int 1063 adduser(char *login_name, user_t *up) 1064 { 1065 struct group *grp; 1066 struct stat st; 1067 time_t expire; 1068 time_t inactive; 1069 char password[PasswordLength + 1]; 1070 char home[MaxFileNameLen]; 1071 char buf[MaxFileNameLen]; 1072 int sync_uid_gid; 1073 int masterfd; 1074 int ptmpfd; 1075 int gid; 1076 int cc; 1077 int i; 1078 1079 if (!valid_login(login_name, up->u_allow_samba)) { 1080 errx(EXIT_FAILURE, "`%s' is not a valid login name", login_name); 1081 } 1082 #ifdef EXTENSIONS 1083 if (!valid_class(up->u_class)) { 1084 errx(EXIT_FAILURE, "No such login class `%s'", up->u_class); 1085 } 1086 #endif 1087 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1088 err(EXIT_FAILURE, "Can't open `%s'", _PATH_MASTERPASSWD); 1089 } 1090 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1091 err(EXIT_FAILURE, "Can't lock `%s'", _PATH_MASTERPASSWD); 1092 } 1093 pw_init(); 1094 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1095 int serrno = errno; 1096 (void)close(masterfd); 1097 errno = serrno; 1098 err(EXIT_FAILURE, "Can't obtain pw_lock"); 1099 } 1100 while ((cc = read(masterfd, buf, sizeof(buf))) > 0) { 1101 if (write(ptmpfd, buf, (size_t)(cc)) != cc) { 1102 int serrno = errno; 1103 (void)close(masterfd); 1104 (void)close(ptmpfd); 1105 (void)pw_abort(); 1106 errno = serrno; 1107 err(EXIT_FAILURE, "Short write to /etc/ptmp " 1108 "(not %d chars)", cc); 1109 } 1110 } 1111 /* if no uid was specified, get next one in [low_uid..high_uid] range */ 1112 sync_uid_gid = (strcmp(up->u_primgrp, "=uid") == 0); 1113 if (up->u_uid == -1) { 1114 int got_id = 0; 1115 1116 /* 1117 * Look for a free UID in the command line ranges (if any). 1118 * These start after the ranges specified in the config file. 1119 */ 1120 for (i = up->u_defrc; !got_id && i < up->u_rc ; i++) { 1121 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1122 up->u_rv[i].r_from, up->u_rv[i].r_to); 1123 } 1124 /* 1125 * If there were no free UIDs in the command line ranges, 1126 * try the ranges from the config file (there will always 1127 * be at least one default). 1128 */ 1129 for (i = 0; !got_id && i < up->u_defrc; i++) { 1130 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1131 up->u_rv[i].r_from, up->u_rv[i].r_to); 1132 } 1133 if (!got_id) { 1134 (void)close(ptmpfd); 1135 (void)pw_abort(); 1136 errx(EXIT_FAILURE, "can't get next uid for %d", 1137 up->u_uid); 1138 } 1139 } 1140 /* check uid isn't already allocated */ 1141 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1142 (void)close(ptmpfd); 1143 (void)pw_abort(); 1144 errx(EXIT_FAILURE, "uid %d is already in use", up->u_uid); 1145 } 1146 /* if -g=uid was specified, check gid is unused */ 1147 if (sync_uid_gid) { 1148 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1149 (void)close(ptmpfd); 1150 (void)pw_abort(); 1151 errx(EXIT_FAILURE, "gid %d is already in use", 1152 up->u_uid); 1153 } 1154 gid = up->u_uid; 1155 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1156 gid = grp->gr_gid; 1157 } else if (is_number(up->u_primgrp) && 1158 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1159 gid = grp->gr_gid; 1160 } else { 1161 (void)close(ptmpfd); 1162 (void)pw_abort(); 1163 errx(EXIT_FAILURE, "group %s not found", up->u_primgrp); 1164 } 1165 /* check name isn't already in use */ 1166 if (!(up->u_flags & F_DUPUID) && getpwnam(login_name) != NULL) { 1167 (void)close(ptmpfd); 1168 (void)pw_abort(); 1169 errx(EXIT_FAILURE, "already a `%s' user", login_name); 1170 } 1171 if (up->u_flags & F_HOMEDIR) { 1172 (void)strlcpy(home, up->u_home, sizeof(home)); 1173 } else { 1174 /* if home directory hasn't been given, make it up */ 1175 (void)snprintf(home, sizeof(home), "%s/%s", up->u_basedir, 1176 login_name); 1177 } 1178 if (!scantime(&inactive, up->u_inactive)) { 1179 warnx("Warning: inactive time `%s' invalid, password expiry off", 1180 up->u_inactive); 1181 } 1182 if (!scantime(&expire, up->u_expire) || expire == -1) { 1183 warnx("Warning: expire time `%s' invalid, account expiry off", 1184 up->u_expire); 1185 expire = 0; /* Just in case. */ 1186 } 1187 if (lstat(home, &st) < 0 && !(up->u_flags & F_MKDIR)) { 1188 warnx("Warning: home directory `%s' doesn't exist, " 1189 "and -m was not specified", home); 1190 } 1191 password[sizeof(password) - 1] = '\0'; 1192 if (up->u_password != NULL && valid_password_length(up->u_password)) { 1193 (void)strlcpy(password, up->u_password, sizeof(password)); 1194 } else { 1195 (void)memset(password, '*', DES_Len); 1196 password[DES_Len] = 0; 1197 if (up->u_password != NULL) { 1198 warnx("Password `%s' is invalid: setting it to `%s'", 1199 up->u_password, password); 1200 } 1201 } 1202 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1203 login_name, 1204 password, 1205 up->u_uid, 1206 gid, 1207 #ifdef EXTENSIONS 1208 up->u_class, 1209 #else 1210 "", 1211 #endif 1212 (long) inactive, 1213 (long) expire, 1214 up->u_comment, 1215 home, 1216 up->u_shell); 1217 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1218 int serrno = errno; 1219 (void)close(ptmpfd); 1220 (void)pw_abort(); 1221 errno = serrno; 1222 err(EXIT_FAILURE, "Can't add `%s'", buf); 1223 } 1224 if (up->u_flags & F_MKDIR) { 1225 if (lstat(home, &st) == 0) { 1226 (void)close(ptmpfd); 1227 (void)pw_abort(); 1228 errx(EXIT_FAILURE, 1229 "Home directory `%s' already exists", home); 1230 } else { 1231 if (asystem("%s -p %s", MKDIR, home) != 0) { 1232 int serrno = errno; 1233 (void)close(ptmpfd); 1234 (void)pw_abort(); 1235 errno = serrno; 1236 err(EXIT_FAILURE, "Can't mkdir `%s'", home); 1237 } 1238 (void)copydotfiles(up->u_skeldir, up->u_uid, gid, home); 1239 } 1240 } 1241 if (strcmp(up->u_primgrp, "=uid") == 0 && 1242 getgrnam(login_name) == NULL && 1243 !creategid(login_name, gid, login_name)) { 1244 (void)close(ptmpfd); 1245 (void)pw_abort(); 1246 errx(EXIT_FAILURE, "Can't create gid %d for login name %s", 1247 gid, login_name); 1248 } 1249 if (up->u_groupc > 0 && 1250 !append_group(login_name, up->u_groupc, up->u_groupv)) { 1251 (void)close(ptmpfd); 1252 (void)pw_abort(); 1253 errx(EXIT_FAILURE, "Can't append `%s' to new groups", 1254 login_name); 1255 } 1256 (void)close(ptmpfd); 1257 #if PW_MKDB_ARGC == 2 1258 if (pw_mkdb(login_name, 0) < 0) 1259 #else 1260 if (pw_mkdb() < 0) 1261 #endif 1262 { 1263 (void)pw_abort(); 1264 errx(EXIT_FAILURE, "pw_mkdb failed"); 1265 } 1266 syslog(LOG_INFO, "New user added: name=%s, uid=%d, gid=%d, home=%s, " 1267 "shell=%s", login_name, up->u_uid, gid, home, up->u_shell); 1268 return 1; 1269 } 1270 1271 /* remove a user from the groups file */ 1272 static int 1273 rm_user_from_groups(char *login_name) 1274 { 1275 struct stat st; 1276 regmatch_t matchv[10]; 1277 regex_t r; 1278 FILE *from; 1279 FILE *to; 1280 char line[MaxEntryLen]; 1281 char buf[MaxEntryLen]; 1282 char f[MaxFileNameLen]; 1283 int fd; 1284 int cc; 1285 int sc; 1286 1287 (void)snprintf(line, sizeof(line), "(:|,)(%s)(,|$)", login_name); 1288 if ((sc = regcomp(&r, line, REG_EXTENDED|REG_NEWLINE)) != 0) { 1289 (void)regerror(sc, &r, buf, sizeof(buf)); 1290 warnx("Can't compile regular expression `%s' (%s)", line, 1291 buf); 1292 return 0; 1293 } 1294 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 1295 warn("Can't remove gid for `%s': can't open `%s'", 1296 login_name, _PATH_GROUP); 1297 return 0; 1298 } 1299 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 1300 warn("can't lock `%s'", _PATH_GROUP); 1301 } 1302 (void)fstat(fileno(from), &st); 1303 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 1304 if ((fd = mkstemp(f)) < 0) { 1305 warn("Can't create gid: mkstemp failed"); 1306 (void)fclose(from); 1307 return 0; 1308 } 1309 if ((to = fdopen(fd, "w")) == NULL) { 1310 warn("Can't create gid: fdopen `%s' failed", f); 1311 (void)fclose(from); 1312 (void)close(fd); 1313 (void)unlink(f); 1314 return 0; 1315 } 1316 while (fgets(buf, sizeof(buf), from) != NULL) { 1317 cc = strlen(buf); 1318 if (regexec(&r, buf, 10, matchv, 0) == 0) { 1319 if (buf[(int)matchv[1].rm_so] == ',') { 1320 matchv[2].rm_so = matchv[1].rm_so; 1321 } else if (matchv[2].rm_eo != matchv[3].rm_eo) { 1322 matchv[2].rm_eo = matchv[3].rm_eo; 1323 } 1324 cc -= (int) matchv[2].rm_eo; 1325 sc = (int) matchv[2].rm_so; 1326 if (fwrite(buf, sizeof(char), (size_t)sc, to) != sc || 1327 fwrite(&buf[(int)matchv[2].rm_eo], sizeof(char), 1328 (size_t)cc, to) != cc) { 1329 warn("Can't create gid: short write to `%s'", 1330 f); 1331 (void)fclose(from); 1332 (void)close(fd); 1333 (void)unlink(f); 1334 return 0; 1335 } 1336 } else if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 1337 warn("Can't create gid: short write to `%s'", f); 1338 (void)fclose(from); 1339 (void)close(fd); 1340 (void)unlink(f); 1341 return 0; 1342 } 1343 } 1344 (void)fclose(from); 1345 (void)fclose(to); 1346 if (rename(f, _PATH_GROUP) < 0) { 1347 warn("Can't create gid: can't rename `%s' to `%s'", 1348 f, _PATH_GROUP); 1349 (void)unlink(f); 1350 return 0; 1351 } 1352 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 1353 return 1; 1354 } 1355 1356 /* check that the user or group is local, not from YP/NIS */ 1357 static int 1358 is_local(char *name, const char *file) 1359 { 1360 FILE *fp; 1361 char buf[MaxEntryLen]; 1362 size_t len; 1363 int ret; 1364 1365 if ((fp = fopen(file, "r")) == NULL) { 1366 err(EXIT_FAILURE, "Can't open `%s'", file); 1367 } 1368 len = strlen(name); 1369 for (ret = 0 ; fgets(buf, sizeof(buf), fp) != NULL ; ) { 1370 if (strncmp(buf, name, len) == 0 && buf[len] == ':') { 1371 ret = 1; 1372 break; 1373 } 1374 } 1375 (void)fclose(fp); 1376 return ret; 1377 } 1378 1379 /* modify a user */ 1380 static int 1381 moduser(char *login_name, char *newlogin, user_t *up, int allow_samba) 1382 { 1383 struct passwd *pwp; 1384 struct group *grp; 1385 const char *homedir; 1386 char *locked_pwd; 1387 size_t colonc; 1388 size_t loginc; 1389 size_t len; 1390 size_t cc; 1391 FILE *master; 1392 char newdir[MaxFileNameLen]; 1393 char buf[MaxEntryLen]; 1394 char *colon; 1395 int masterfd; 1396 int ptmpfd; 1397 int error; 1398 1399 if (!valid_login(newlogin, allow_samba)) { 1400 errx(EXIT_FAILURE, "`%s' is not a valid login name", 1401 login_name); 1402 } 1403 if ((pwp = getpwnam(login_name)) == NULL) { 1404 errx(EXIT_FAILURE, "No such user `%s'", login_name); 1405 } 1406 if (!is_local(login_name, _PATH_MASTERPASSWD)) { 1407 errx(EXIT_FAILURE, "User `%s' must be a local user", 1408 login_name); 1409 } 1410 /* keep dir name in case we need it for '-m' */ 1411 homedir = pwp->pw_dir; 1412 1413 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1414 err(EXIT_FAILURE, "Can't open `%s'", _PATH_MASTERPASSWD); 1415 } 1416 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1417 err(EXIT_FAILURE, "Can't lock `%s'", _PATH_MASTERPASSWD); 1418 } 1419 pw_init(); 1420 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1421 int serrno = errno; 1422 (void)close(masterfd); 1423 errno = serrno; 1424 err(EXIT_FAILURE, "Can't obtain pw_lock"); 1425 } 1426 if ((master = fdopen(masterfd, "r")) == NULL) { 1427 int serrno = errno; 1428 (void)close(masterfd); 1429 (void)close(ptmpfd); 1430 (void)pw_abort(); 1431 errno = serrno; 1432 err(EXIT_FAILURE, "Can't fdopen fd for %s", _PATH_MASTERPASSWD); 1433 } 1434 if (up != NULL) { 1435 if (up->u_flags & F_USERNAME) { 1436 /* 1437 * If changing name, 1438 * check new name isn't already in use 1439 */ 1440 if (strcmp(login_name, newlogin) != 0 && 1441 getpwnam(newlogin) != NULL) { 1442 (void)close(ptmpfd); 1443 (void)pw_abort(); 1444 errx(EXIT_FAILURE, "Already a `%s' user", 1445 newlogin); 1446 } 1447 pwp->pw_name = newlogin; 1448 1449 /* 1450 * Provide a new directory name in case the 1451 * home directory is to be moved. 1452 */ 1453 if (up->u_flags & F_MKDIR) { 1454 (void)snprintf(newdir, sizeof(newdir), "%s/%s", 1455 up->u_basedir, newlogin); 1456 pwp->pw_dir = newdir; 1457 } 1458 } 1459 if (up->u_flags & F_PASSWORD) { 1460 if (up->u_password != NULL) { 1461 if (!valid_password_length(up->u_password)) { 1462 (void)close(ptmpfd); 1463 (void)pw_abort(); 1464 errx(EXIT_FAILURE, 1465 "Invalid password: `%s'", 1466 up->u_password); 1467 } 1468 if ((locked_pwd = 1469 strstr(pwp->pw_passwd, LOCKED)) != NULL) { 1470 /* 1471 * account is locked - keep it locked 1472 * and just change the password. 1473 */ 1474 if (asprintf(&locked_pwd, "%s%s", 1475 LOCKED, up->u_password) == -1) { 1476 err(EXIT_FAILURE, 1477 "asprintf failed"); 1478 } 1479 pwp->pw_passwd = locked_pwd; 1480 } else { 1481 pwp->pw_passwd = up->u_password; 1482 } 1483 } 1484 } 1485 1486 /* check whether we should lock the account. */ 1487 if (up->u_locked == LOCK) { 1488 /* check to see account if already locked. */ 1489 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1490 != NULL) { 1491 warnx("Account is already locked"); 1492 } else { 1493 if (asprintf(&locked_pwd, "%s%s", LOCKED, 1494 pwp->pw_passwd) == -1) { 1495 err(EXIT_FAILURE, "asprintf failed"); 1496 } 1497 pwp->pw_passwd = locked_pwd; 1498 } 1499 } else if (up->u_locked == UNLOCK) { 1500 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1501 == NULL) { 1502 warnx("Account '%s' is not locked", login_name); 1503 } else { 1504 pwp->pw_passwd = locked_pwd + strlen(LOCKED); 1505 } 1506 } 1507 1508 if (up->u_flags & F_UID) { 1509 /* check uid isn't already allocated */ 1510 if (!(up->u_flags & F_DUPUID) && 1511 getpwuid((uid_t)(up->u_uid)) != NULL) { 1512 (void)close(ptmpfd); 1513 (void)pw_abort(); 1514 errx(EXIT_FAILURE, "Uid %d is already in use", 1515 up->u_uid); 1516 } 1517 pwp->pw_uid = up->u_uid; 1518 } 1519 if (up->u_flags & F_GROUP) { 1520 /* if -g=uid was specified, check gid is unused */ 1521 if (strcmp(up->u_primgrp, "=uid") == 0) { 1522 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1523 (void)close(ptmpfd); 1524 (void)pw_abort(); 1525 errx(EXIT_FAILURE, 1526 "Gid %d is already in use", 1527 up->u_uid); 1528 } 1529 pwp->pw_gid = up->u_uid; 1530 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1531 pwp->pw_gid = grp->gr_gid; 1532 } else if (is_number(up->u_primgrp) && 1533 (grp = getgrgid( 1534 (gid_t)atoi(up->u_primgrp))) != NULL) { 1535 pwp->pw_gid = grp->gr_gid; 1536 } else { 1537 (void)close(ptmpfd); 1538 (void)pw_abort(); 1539 errx(EXIT_FAILURE, "Group %s not found", 1540 up->u_primgrp); 1541 } 1542 } 1543 if (up->u_flags & F_INACTIVE) { 1544 if (!scantime(&pwp->pw_change, up->u_inactive)) { 1545 warnx("Warning: inactive time `%s' invalid, " 1546 "password expiry off", 1547 up->u_inactive); 1548 } 1549 } 1550 if (up->u_flags & F_EXPIRE) { 1551 if (!scantime(&pwp->pw_expire, up->u_expire) || 1552 pwp->pw_expire == -1) { 1553 warnx("Warning: expire time `%s' invalid, " 1554 "account expiry off", 1555 up->u_expire); 1556 pwp->pw_expire = 0; 1557 } 1558 } 1559 if (up->u_flags & F_COMMENT) { 1560 pwp->pw_gecos = up->u_comment; 1561 } 1562 if (up->u_flags & F_HOMEDIR) { 1563 pwp->pw_dir = up->u_home; 1564 } 1565 if (up->u_flags & F_SHELL) { 1566 pwp->pw_shell = up->u_shell; 1567 } 1568 #ifdef EXTENSIONS 1569 if (up->u_flags & F_CLASS) { 1570 if (!valid_class(up->u_class)) { 1571 (void)close(ptmpfd); 1572 (void)pw_abort(); 1573 errx(EXIT_FAILURE, "No such login class `%s'", 1574 up->u_class); 1575 } 1576 pwp->pw_class = up->u_class; 1577 } 1578 #endif 1579 } 1580 loginc = strlen(login_name); 1581 while (fgets(buf, sizeof(buf), master) != NULL) { 1582 if ((colon = strchr(buf, ':')) == NULL) { 1583 warnx("Malformed entry `%s'. Skipping", buf); 1584 continue; 1585 } 1586 colonc = (size_t)(colon - buf); 1587 if (strncmp(login_name, buf, loginc) == 0 && loginc == colonc) { 1588 if (up != NULL) { 1589 len = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:" 1590 #ifdef EXTENSIONS 1591 "%s" 1592 #endif 1593 ":%ld:%ld:%s:%s:%s\n", 1594 newlogin, 1595 pwp->pw_passwd, 1596 pwp->pw_uid, 1597 pwp->pw_gid, 1598 #ifdef EXTENSIONS 1599 pwp->pw_class, 1600 #endif 1601 (long)pwp->pw_change, 1602 (long)pwp->pw_expire, 1603 pwp->pw_gecos, 1604 pwp->pw_dir, 1605 pwp->pw_shell); 1606 if (write(ptmpfd, buf, len) != len) { 1607 int serrno = errno; 1608 (void)close(ptmpfd); 1609 (void)pw_abort(); 1610 errno = serrno; 1611 err(EXIT_FAILURE, "Can't add `%s'", 1612 buf); 1613 } 1614 } 1615 } else { 1616 len = strlen(buf); 1617 if ((cc = write(ptmpfd, buf, len)) != len) { 1618 int serrno = errno; 1619 (void)close(masterfd); 1620 (void)close(ptmpfd); 1621 (void)pw_abort(); 1622 errno = serrno; 1623 err(EXIT_FAILURE, "Short write to /etc/ptmp " 1624 "(%ld not %ld chars)", 1625 (unsigned long)cc, 1626 (unsigned long)len); 1627 } 1628 } 1629 } 1630 if (up != NULL) { 1631 if ((up->u_flags & F_MKDIR) && 1632 asystem("%s %s %s", MV, homedir, pwp->pw_dir) != 0) { 1633 int serrno = errno; 1634 (void)close(ptmpfd); 1635 (void)pw_abort(); 1636 errno = serrno; 1637 err(EXIT_FAILURE, "Can't move `%s' to `%s'", 1638 homedir, pwp->pw_dir); 1639 } 1640 if (up->u_groupc > 0 && 1641 !append_group(newlogin, up->u_groupc, up->u_groupv)) { 1642 (void)close(ptmpfd); 1643 (void)pw_abort(); 1644 errx(EXIT_FAILURE, "Can't append `%s' to new groups", 1645 newlogin); 1646 } 1647 } 1648 (void)close(ptmpfd); 1649 #if PW_MKDB_ARGC == 2 1650 if (up != NULL && strcmp(login_name, newlogin) == 0) { 1651 error = pw_mkdb(login_name, 0); 1652 } else { 1653 error = pw_mkdb(NULL, 0); 1654 } 1655 #else 1656 error = pw_mkdb(); 1657 #endif 1658 if (error < 0) { 1659 (void)pw_abort(); 1660 errx(EXIT_FAILURE, "pw_mkdb failed"); 1661 } 1662 if (up == NULL) { 1663 syslog(LOG_INFO, "User removed: name=%s", login_name); 1664 } else if (strcmp(login_name, newlogin) == 0) { 1665 syslog(LOG_INFO, "User information modified: name=%s, uid=%d, " 1666 "gid=%d, home=%s, shell=%s", 1667 login_name, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, 1668 pwp->pw_shell); 1669 } else { 1670 syslog(LOG_INFO, "User information modified: name=%s, " 1671 "new name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1672 login_name, newlogin, pwp->pw_uid, pwp->pw_gid, 1673 pwp->pw_dir, pwp->pw_shell); 1674 } 1675 return 1; 1676 } 1677 1678 #ifdef EXTENSIONS 1679 /* see if we can find out the user struct */ 1680 static struct passwd * 1681 find_user_info(const char *name) 1682 { 1683 struct passwd *pwp; 1684 1685 if ((pwp = getpwnam(name)) != NULL) { 1686 return pwp; 1687 } 1688 if (is_number(name) && (pwp = getpwuid((uid_t)atoi(name))) != NULL) { 1689 return pwp; 1690 } 1691 return NULL; 1692 } 1693 #endif 1694 1695 /* see if we can find out the group struct */ 1696 static struct group * 1697 find_group_info(const char *name) 1698 { 1699 struct group *grp; 1700 1701 if ((grp = getgrnam(name)) != NULL) { 1702 return grp; 1703 } 1704 if (is_number(name) && (grp = getgrgid((gid_t)atoi(name))) != NULL) { 1705 return grp; 1706 } 1707 return NULL; 1708 } 1709 1710 /* print out usage message, and then exit */ 1711 void 1712 usermgmt_usage(const char *prog) 1713 { 1714 if (strcmp(prog, "useradd") == 0) { 1715 (void)fprintf(stderr, "usage: %s -D [-F] [-b base-dir] " 1716 "[-e expiry-time] [-f inactive-time]\n" 1717 "\t[-g gid | name | =uid] [-k skel-dir] [-L login-class]\n" 1718 "\t[-r lowuid..highuid] [-s shell]\n", prog); 1719 (void)fprintf(stderr, "usage: %s [-moSv] [-b base-dir] " 1720 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1721 "\t[-f inactive-time] [-G secondary-group] " 1722 "[-g gid | name | =uid]\n" 1723 "\t[-k skeletondir] [-L login-class] [-p password]" 1724 "[-r lowuid..highuid]\n" 1725 "\t[-s shell] [-u uid] user\n", 1726 prog); 1727 } else if (strcmp(prog, "usermod") == 0) { 1728 (void)fprintf(stderr, "usage: %s [-FmoSv] [-C yes/no] " 1729 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1730 "\t[-f inactive] [-G secondary-group] " 1731 "[-g gid | name | =uid]\n" 1732 "\t[-L login-class] [-l new-login] [-p password] " 1733 "[-s shell] [-u uid]\n" 1734 "\tuser\n", prog); 1735 } else if (strcmp(prog, "userdel") == 0) { 1736 (void)fprintf(stderr, "usage: %s -D [-p preserve-value]\n", prog); 1737 (void)fprintf(stderr, 1738 "usage: %s [-rSv] [-p preserve-value] user\n", prog); 1739 #ifdef EXTENSIONS 1740 } else if (strcmp(prog, "userinfo") == 0) { 1741 (void)fprintf(stderr, "usage: %s [-ev] user\n", prog); 1742 #endif 1743 } else if (strcmp(prog, "groupadd") == 0) { 1744 (void)fprintf(stderr, "usage: %s [-ov] [-g gid]" 1745 " [-r lowgid..highgid] group\n", prog); 1746 } else if (strcmp(prog, "groupdel") == 0) { 1747 (void)fprintf(stderr, "usage: %s [-v] group\n", prog); 1748 } else if (strcmp(prog, "groupmod") == 0) { 1749 (void)fprintf(stderr, 1750 "usage: %s [-ov] [-g gid] [-n newname] group\n", prog); 1751 } else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) { 1752 (void)fprintf(stderr, 1753 "usage: %s ( add | del | mod | info ) ...\n", prog); 1754 #ifdef EXTENSIONS 1755 } else if (strcmp(prog, "groupinfo") == 0) { 1756 (void)fprintf(stderr, "usage: %s [-ev] group\n", prog); 1757 #endif 1758 } 1759 exit(EXIT_FAILURE); 1760 /* NOTREACHED */ 1761 } 1762 1763 #ifdef EXTENSIONS 1764 #define ADD_OPT_EXTENSIONS "p:r:vL:S" 1765 #else 1766 #define ADD_OPT_EXTENSIONS 1767 #endif 1768 1769 int 1770 useradd(int argc, char **argv) 1771 { 1772 user_t u; 1773 int defaultfield; 1774 int bigD; 1775 int c; 1776 #ifdef EXTENSIONS 1777 int i; 1778 #endif 1779 1780 (void)memset(&u, 0, sizeof(u)); 1781 read_defaults(&u); 1782 u.u_uid = -1; 1783 defaultfield = bigD = 0; 1784 while ((c = getopt(argc, argv, "DFG:b:c:d:e:f:g:k:mou:s:" 1785 ADD_OPT_EXTENSIONS)) != -1) { 1786 switch(c) { 1787 case 'D': 1788 bigD = 1; 1789 break; 1790 case 'F': 1791 /* 1792 * Setting -1 will force the new user to 1793 * change their password as soon as they 1794 * next log in - passwd(5). 1795 */ 1796 defaultfield = 1; 1797 memsave(&u.u_inactive, "-1", strlen("-1")); 1798 break; 1799 case 'G': 1800 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1801 u.u_groupc < NGROUPS_MAX) { 1802 if (u.u_groupv[u.u_groupc][0] != 0) { 1803 u.u_groupc++; 1804 } 1805 } 1806 if (optarg != NULL) { 1807 warnx("Truncated list of secondary groups " 1808 "to %d entries", NGROUPS_MAX); 1809 } 1810 break; 1811 #ifdef EXTENSIONS 1812 case 'S': 1813 u.u_allow_samba = 1; 1814 break; 1815 #endif 1816 case 'b': 1817 defaultfield = 1; 1818 memsave(&u.u_basedir, optarg, strlen(optarg)); 1819 break; 1820 case 'c': 1821 memsave(&u.u_comment, optarg, strlen(optarg)); 1822 break; 1823 case 'd': 1824 memsave(&u.u_home, optarg, strlen(optarg)); 1825 u.u_flags |= F_HOMEDIR; 1826 break; 1827 case 'e': 1828 defaultfield = 1; 1829 memsave(&u.u_expire, optarg, strlen(optarg)); 1830 break; 1831 case 'f': 1832 defaultfield = 1; 1833 memsave(&u.u_inactive, optarg, strlen(optarg)); 1834 break; 1835 case 'g': 1836 defaultfield = 1; 1837 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1838 break; 1839 case 'k': 1840 defaultfield = 1; 1841 memsave(&u.u_skeldir, optarg, strlen(optarg)); 1842 break; 1843 #ifdef EXTENSIONS 1844 case 'L': 1845 defaultfield = 1; 1846 memsave(&u.u_class, optarg, strlen(optarg)); 1847 break; 1848 #endif 1849 case 'm': 1850 u.u_flags |= F_MKDIR; 1851 break; 1852 case 'o': 1853 u.u_flags |= F_DUPUID; 1854 break; 1855 #ifdef EXTENSIONS 1856 case 'p': 1857 memsave(&u.u_password, optarg, strlen(optarg)); 1858 break; 1859 #endif 1860 #ifdef EXTENSIONS 1861 case 'r': 1862 defaultfield = 1; 1863 (void)save_range(&u, optarg); 1864 break; 1865 #endif 1866 case 's': 1867 defaultfield = 1; 1868 memsave(&u.u_shell, optarg, strlen(optarg)); 1869 break; 1870 case 'u': 1871 u.u_uid = check_numeric(optarg, "uid"); 1872 break; 1873 #ifdef EXTENSIONS 1874 case 'v': 1875 verbose = 1; 1876 break; 1877 #endif 1878 default: 1879 usermgmt_usage("useradd"); 1880 /* NOTREACHED */ 1881 } 1882 } 1883 if (bigD) { 1884 if (defaultfield) { 1885 checkeuid(); 1886 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1887 } 1888 (void)printf("group\t\t%s\n", u.u_primgrp); 1889 (void)printf("base_dir\t%s\n", u.u_basedir); 1890 (void)printf("skel_dir\t%s\n", u.u_skeldir); 1891 (void)printf("shell\t\t%s\n", u.u_shell); 1892 #ifdef EXTENSIONS 1893 (void)printf("class\t\t%s\n", u.u_class); 1894 #endif 1895 (void)printf("inactive\t%s\n", (u.u_inactive == NULL) ? 1896 UNSET_INACTIVE : u.u_inactive); 1897 (void)printf("expire\t\t%s\n", (u.u_expire == NULL) ? 1898 UNSET_EXPIRY : u.u_expire); 1899 #ifdef EXTENSIONS 1900 for (i = 0 ; i < u.u_rc ; i++) { 1901 (void)printf("range\t\t%d..%d\n", 1902 u.u_rv[i].r_from, u.u_rv[i].r_to); 1903 } 1904 #endif 1905 return EXIT_SUCCESS; 1906 } 1907 argc -= optind; 1908 argv += optind; 1909 if (argc != 1) { 1910 usermgmt_usage("useradd"); 1911 } 1912 checkeuid(); 1913 openlog("useradd", LOG_PID, LOG_USER); 1914 return adduser(*argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1915 } 1916 1917 #ifdef EXTENSIONS 1918 #define MOD_OPT_EXTENSIONS "p:vL:S" 1919 #else 1920 #define MOD_OPT_EXTENSIONS 1921 #endif 1922 1923 int 1924 usermod(int argc, char **argv) 1925 { 1926 user_t u; 1927 char newuser[MaxUserNameLen + 1]; 1928 int c, have_new_user; 1929 1930 (void)memset(&u, 0, sizeof(u)); 1931 (void)memset(newuser, 0, sizeof(newuser)); 1932 read_defaults(&u); 1933 have_new_user = 0; 1934 u.u_locked = -1; 1935 while ((c = getopt(argc, argv, "C:FG:c:d:e:f:g:l:mos:u:" 1936 MOD_OPT_EXTENSIONS)) != -1) { 1937 switch(c) { 1938 case 'G': 1939 while ((u.u_groupv[u.u_groupc] = 1940 strsep(&optarg, ",")) != NULL && 1941 u.u_groupc < NGROUPS_MAX) { 1942 if (u.u_groupv[u.u_groupc][0] != 0) { 1943 u.u_groupc++; 1944 } 1945 } 1946 if (optarg != NULL) { 1947 warnx("Truncated list of secondary groups " 1948 "to %d entries", NGROUPS_MAX); 1949 } 1950 u.u_flags |= F_SECGROUP; 1951 break; 1952 #ifdef EXTENSIONS 1953 case 'S': 1954 u.u_allow_samba = 1; 1955 break; 1956 #endif 1957 case 'c': 1958 memsave(&u.u_comment, optarg, strlen(optarg)); 1959 u.u_flags |= F_COMMENT; 1960 break; 1961 case 'C': 1962 if (strcasecmp(optarg, "yes") == 0) { 1963 u.u_locked = LOCK; 1964 } else if (strcasecmp(optarg, "no") == 0) { 1965 u.u_locked = UNLOCK; 1966 } else { 1967 /* No idea. */ 1968 errx(EXIT_FAILURE, 1969 "Please type 'yes' or 'no'"); 1970 } 1971 break; 1972 case 'F': 1973 memsave(&u.u_inactive, "-1", strlen("-1")); 1974 u.u_flags |= F_INACTIVE; 1975 break; 1976 case 'd': 1977 memsave(&u.u_home, optarg, strlen(optarg)); 1978 u.u_flags |= F_HOMEDIR; 1979 break; 1980 case 'e': 1981 memsave(&u.u_expire, optarg, strlen(optarg)); 1982 u.u_flags |= F_EXPIRE; 1983 break; 1984 case 'f': 1985 memsave(&u.u_inactive, optarg, strlen(optarg)); 1986 u.u_flags |= F_INACTIVE; 1987 break; 1988 case 'g': 1989 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1990 u.u_flags |= F_GROUP; 1991 break; 1992 case 'l': 1993 (void)strlcpy(newuser, optarg, sizeof(newuser)); 1994 have_new_user = 1; 1995 u.u_flags |= F_USERNAME; 1996 break; 1997 #ifdef EXTENSIONS 1998 case 'L': 1999 memsave(&u.u_class, optarg, strlen(optarg)); 2000 u.u_flags |= F_CLASS; 2001 break; 2002 #endif 2003 case 'm': 2004 u.u_flags |= F_MKDIR; 2005 break; 2006 case 'o': 2007 u.u_flags |= F_DUPUID; 2008 break; 2009 #ifdef EXTENSIONS 2010 case 'p': 2011 memsave(&u.u_password, optarg, strlen(optarg)); 2012 u.u_flags |= F_PASSWORD; 2013 break; 2014 #endif 2015 case 's': 2016 memsave(&u.u_shell, optarg, strlen(optarg)); 2017 u.u_flags |= F_SHELL; 2018 break; 2019 case 'u': 2020 u.u_uid = check_numeric(optarg, "uid"); 2021 u.u_flags |= F_UID; 2022 break; 2023 #ifdef EXTENSIONS 2024 case 'v': 2025 verbose = 1; 2026 break; 2027 #endif 2028 default: 2029 usermgmt_usage("usermod"); 2030 /* NOTREACHED */ 2031 } 2032 } 2033 if ((u.u_flags & F_MKDIR) && !(u.u_flags & F_HOMEDIR) && 2034 !(u.u_flags & F_USERNAME)) { 2035 warnx("Option 'm' useless without 'd' or 'l' -- ignored"); 2036 u.u_flags &= ~F_MKDIR; 2037 } 2038 argc -= optind; 2039 argv += optind; 2040 if (argc != 1) { 2041 usermgmt_usage("usermod"); 2042 } 2043 checkeuid(); 2044 openlog("usermod", LOG_PID, LOG_USER); 2045 return moduser(*argv, (have_new_user) ? newuser : *argv, &u, 2046 u.u_allow_samba) ? EXIT_SUCCESS : EXIT_FAILURE; 2047 } 2048 2049 #ifdef EXTENSIONS 2050 #define DEL_OPT_EXTENSIONS "Dp:vS" 2051 #else 2052 #define DEL_OPT_EXTENSIONS 2053 #endif 2054 2055 int 2056 userdel(int argc, char **argv) 2057 { 2058 struct passwd *pwp; 2059 user_t u; 2060 char password[PasswordLength + 1]; 2061 int defaultfield; 2062 int rmhome; 2063 int bigD; 2064 int c; 2065 2066 (void)memset(&u, 0, sizeof(u)); 2067 read_defaults(&u); 2068 defaultfield = bigD = rmhome = 0; 2069 while ((c = getopt(argc, argv, "r" DEL_OPT_EXTENSIONS)) != -1) { 2070 switch(c) { 2071 #ifdef EXTENSIONS 2072 case 'D': 2073 bigD = 1; 2074 break; 2075 #endif 2076 #ifdef EXTENSIONS 2077 case 'S': 2078 u.u_allow_samba = 1; 2079 break; 2080 #endif 2081 #ifdef EXTENSIONS 2082 case 'p': 2083 defaultfield = 1; 2084 u.u_preserve = (strcmp(optarg, "true") == 0) ? 1 : 2085 (strcmp(optarg, "yes") == 0) ? 1 : 2086 atoi(optarg); 2087 break; 2088 #endif 2089 case 'r': 2090 rmhome = 1; 2091 break; 2092 #ifdef EXTENSIONS 2093 case 'v': 2094 verbose = 1; 2095 break; 2096 #endif 2097 default: 2098 usermgmt_usage("userdel"); 2099 /* NOTREACHED */ 2100 } 2101 } 2102 #ifdef EXTENSIONS 2103 if (bigD) { 2104 if (defaultfield) { 2105 checkeuid(); 2106 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 2107 } 2108 (void)printf("preserve\t%s\n", (u.u_preserve) ? "true" : 2109 "false"); 2110 return EXIT_SUCCESS; 2111 } 2112 #endif 2113 argc -= optind; 2114 argv += optind; 2115 if (argc != 1) { 2116 usermgmt_usage("userdel"); 2117 } 2118 checkeuid(); 2119 if ((pwp = getpwnam(*argv)) == NULL) { 2120 warnx("No such user `%s'", *argv); 2121 return EXIT_FAILURE; 2122 } 2123 if (rmhome) { 2124 (void)removehomedir(pwp->pw_name, pwp->pw_uid, pwp->pw_dir); 2125 } 2126 if (u.u_preserve) { 2127 u.u_flags |= F_SHELL; 2128 memsave(&u.u_shell, NOLOGIN, strlen(NOLOGIN)); 2129 (void)memset(password, '*', DES_Len); 2130 password[DES_Len] = 0; 2131 memsave(&u.u_password, password, strlen(password)); 2132 u.u_flags |= F_PASSWORD; 2133 openlog("userdel", LOG_PID, LOG_USER); 2134 return moduser(*argv, *argv, &u, u.u_allow_samba) ? 2135 EXIT_SUCCESS : EXIT_FAILURE; 2136 } 2137 if (!rm_user_from_groups(*argv)) { 2138 return 0; 2139 } 2140 openlog("userdel", LOG_PID, LOG_USER); 2141 return moduser(*argv, *argv, NULL, u.u_allow_samba) ? 2142 EXIT_SUCCESS : EXIT_FAILURE; 2143 } 2144 2145 #ifdef EXTENSIONS 2146 #define GROUP_ADD_OPT_EXTENSIONS "r:v" 2147 #else 2148 #define GROUP_ADD_OPT_EXTENSIONS 2149 #endif 2150 2151 /* add a group */ 2152 int 2153 groupadd(int argc, char **argv) 2154 { 2155 int dupgid; 2156 int gid; 2157 int c; 2158 int lowgid; 2159 int highgid; 2160 2161 gid = -1; 2162 dupgid = 0; 2163 lowgid = LowGid; 2164 highgid = HighGid; 2165 while ((c = getopt(argc, argv, "g:o" GROUP_ADD_OPT_EXTENSIONS)) != -1) { 2166 switch(c) { 2167 case 'g': 2168 gid = check_numeric(optarg, "gid"); 2169 break; 2170 case 'o': 2171 dupgid = 1; 2172 break; 2173 #ifdef EXTENSIONS 2174 case 'r': 2175 if (sscanf(optarg, "%d..%d", &lowgid, &highgid) != 2) { 2176 errx(EXIT_FAILURE, "Bad range `%s'", optarg); 2177 } 2178 break; 2179 case 'v': 2180 verbose = 1; 2181 break; 2182 #endif 2183 default: 2184 usermgmt_usage("groupadd"); 2185 /* NOTREACHED */ 2186 } 2187 } 2188 argc -= optind; 2189 argv += optind; 2190 if (argc != 1) { 2191 usermgmt_usage("groupadd"); 2192 } 2193 checkeuid(); 2194 if (gid < 0 && !getnextgid(&gid, lowgid, highgid)) { 2195 err(EXIT_FAILURE, "Can't add group: can't get next gid"); 2196 } 2197 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 2198 errx(EXIT_FAILURE, "Can't add group: gid %d is a duplicate", 2199 gid); 2200 } 2201 if (!valid_group(*argv)) { 2202 warnx("Invalid group name `%s'", *argv); 2203 } 2204 openlog("groupadd", LOG_PID, LOG_USER); 2205 if (!creategid(*argv, gid, "")) { 2206 errx(EXIT_FAILURE, "Can't add group: problems with %s file", 2207 _PATH_GROUP); 2208 } 2209 return EXIT_SUCCESS; 2210 } 2211 2212 #ifdef EXTENSIONS 2213 #define GROUP_DEL_OPT_EXTENSIONS "v" 2214 #else 2215 #define GROUP_DEL_OPT_EXTENSIONS 2216 #endif 2217 2218 /* remove a group */ 2219 int 2220 groupdel(int argc, char **argv) 2221 { 2222 int c; 2223 2224 while ((c = getopt(argc, argv, "" GROUP_DEL_OPT_EXTENSIONS)) != -1) { 2225 switch(c) { 2226 #ifdef EXTENSIONS 2227 case 'v': 2228 verbose = 1; 2229 break; 2230 #endif 2231 default: 2232 usermgmt_usage("groupdel"); 2233 /* NOTREACHED */ 2234 } 2235 } 2236 argc -= optind; 2237 argv += optind; 2238 if (argc != 1) { 2239 usermgmt_usage("groupdel"); 2240 } 2241 if (getgrnam(*argv) == NULL) { 2242 errx(EXIT_FAILURE, "No such group `%s'", *argv); 2243 } 2244 checkeuid(); 2245 openlog("groupdel", LOG_PID, LOG_USER); 2246 if (!modify_gid(*argv, NULL)) { 2247 errx(EXIT_FAILURE, "Can't change `%s' file", _PATH_GROUP); 2248 } 2249 return EXIT_SUCCESS; 2250 } 2251 2252 #ifdef EXTENSIONS 2253 #define GROUP_MOD_OPT_EXTENSIONS "v" 2254 #else 2255 #define GROUP_MOD_OPT_EXTENSIONS 2256 #endif 2257 2258 /* modify a group */ 2259 int 2260 groupmod(int argc, char **argv) 2261 { 2262 struct group *grp; 2263 char buf[MaxEntryLen]; 2264 char *newname; 2265 char **cpp; 2266 int dupgid; 2267 int gid; 2268 int cc; 2269 int c; 2270 2271 gid = -1; 2272 dupgid = 0; 2273 newname = NULL; 2274 while ((c = getopt(argc, argv, "g:on:" GROUP_MOD_OPT_EXTENSIONS)) != -1) { 2275 switch(c) { 2276 case 'g': 2277 gid = check_numeric(optarg, "gid"); 2278 break; 2279 case 'o': 2280 dupgid = 1; 2281 break; 2282 case 'n': 2283 memsave(&newname, optarg, strlen(optarg)); 2284 break; 2285 #ifdef EXTENSIONS 2286 case 'v': 2287 verbose = 1; 2288 break; 2289 #endif 2290 default: 2291 usermgmt_usage("groupmod"); 2292 /* NOTREACHED */ 2293 } 2294 } 2295 argc -= optind; 2296 argv += optind; 2297 if (argc != 1) { 2298 usermgmt_usage("groupmod"); 2299 } 2300 checkeuid(); 2301 if (gid < 0 && newname == NULL) { 2302 errx(EXIT_FAILURE, "Nothing to change"); 2303 } 2304 if (dupgid && gid < 0) { 2305 errx(EXIT_FAILURE, "Duplicate which gid?"); 2306 } 2307 if ((grp = find_group_info(*argv)) == NULL) { 2308 errx(EXIT_FAILURE, "Can't find group `%s' to modify", *argv); 2309 } 2310 if (!is_local(*argv, _PATH_GROUP)) { 2311 errx(EXIT_FAILURE, "Group `%s' must be a local group", *argv); 2312 } 2313 if (newname != NULL && !valid_group(newname)) { 2314 warnx("Invalid group name `%s'", newname); 2315 } 2316 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:", 2317 (newname) ? newname : grp->gr_name, 2318 grp->gr_passwd, 2319 (gid < 0) ? grp->gr_gid : gid); 2320 for (cpp = grp->gr_mem ; *cpp && cc < sizeof(buf) ; cpp++) { 2321 cc += snprintf(&buf[cc], sizeof(buf) - cc, "%s%s", *cpp, 2322 (cpp[1] == NULL) ? "" : ","); 2323 } 2324 cc += snprintf(&buf[cc], sizeof(buf) - cc, "\n"); 2325 openlog("groupmod", LOG_PID, LOG_USER); 2326 if (!modify_gid(*argv, buf)) { 2327 errx(EXIT_FAILURE, "Can't change %s file", _PATH_GROUP); 2328 } 2329 return EXIT_SUCCESS; 2330 } 2331 2332 #ifdef EXTENSIONS 2333 /* display user information */ 2334 int 2335 userinfo(int argc, char **argv) 2336 { 2337 struct passwd *pwp; 2338 struct group *grp; 2339 char buf[MaxEntryLen]; 2340 char **cpp; 2341 int exists; 2342 int cc; 2343 int i; 2344 2345 exists = 0; 2346 while ((i = getopt(argc, argv, "ev")) != -1) { 2347 switch(i) { 2348 case 'e': 2349 exists = 1; 2350 break; 2351 case 'v': 2352 verbose = 1; 2353 break; 2354 default: 2355 usermgmt_usage("userinfo"); 2356 /* NOTREACHED */ 2357 } 2358 } 2359 argc -= optind; 2360 argv += optind; 2361 if (argc != 1) { 2362 usermgmt_usage("userinfo"); 2363 } 2364 pwp = find_user_info(*argv); 2365 if (exists) { 2366 exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE); 2367 } 2368 if (pwp == NULL) { 2369 errx(EXIT_FAILURE, "Can't find user `%s'", *argv); 2370 } 2371 (void)printf("login\t%s\n", pwp->pw_name); 2372 (void)printf("passwd\t%s\n", pwp->pw_passwd); 2373 (void)printf("uid\t%d\n", pwp->pw_uid); 2374 for (cc = 0 ; (grp = getgrent()) != NULL ; ) { 2375 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2376 if (strcmp(*cpp, *argv) == 0 && 2377 grp->gr_gid != pwp->pw_gid) { 2378 cc += snprintf(&buf[cc], sizeof(buf) - cc, 2379 "%s ", grp->gr_name); 2380 } 2381 } 2382 } 2383 if ((grp = getgrgid(pwp->pw_gid)) == NULL) { 2384 (void)printf("groups\t%d %s\n", pwp->pw_gid, buf); 2385 } else { 2386 (void)printf("groups\t%s %s\n", grp->gr_name, buf); 2387 } 2388 (void)printf("change\t%s", pwp->pw_change > 0 ? 2389 ctime(&pwp->pw_change) : pwp->pw_change == -1 ? 2390 "NEXT LOGIN\n" : "NEVER\n"); 2391 (void)printf("class\t%s\n", pwp->pw_class); 2392 (void)printf("gecos\t%s\n", pwp->pw_gecos); 2393 (void)printf("dir\t%s\n", pwp->pw_dir); 2394 (void)printf("shell\t%s\n", pwp->pw_shell); 2395 (void)printf("expire\t%s", pwp->pw_expire ? 2396 ctime(&pwp->pw_expire) : "NEVER\n"); 2397 return EXIT_SUCCESS; 2398 } 2399 #endif 2400 2401 #ifdef EXTENSIONS 2402 /* display user information */ 2403 int 2404 groupinfo(int argc, char **argv) 2405 { 2406 struct group *grp; 2407 char **cpp; 2408 int exists; 2409 int i; 2410 2411 exists = 0; 2412 while ((i = getopt(argc, argv, "ev")) != -1) { 2413 switch(i) { 2414 case 'e': 2415 exists = 1; 2416 break; 2417 case 'v': 2418 verbose = 1; 2419 break; 2420 default: 2421 usermgmt_usage("groupinfo"); 2422 /* NOTREACHED */ 2423 } 2424 } 2425 argc -= optind; 2426 argv += optind; 2427 if (argc != 1) { 2428 usermgmt_usage("groupinfo"); 2429 } 2430 grp = find_group_info(*argv); 2431 if (exists) { 2432 exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE); 2433 } 2434 if (grp == NULL) { 2435 errx(EXIT_FAILURE, "Can't find group `%s'", *argv); 2436 } 2437 (void)printf("name\t%s\n", grp->gr_name); 2438 (void)printf("passwd\t%s\n", grp->gr_passwd); 2439 (void)printf("gid\t%d\n", grp->gr_gid); 2440 (void)printf("members\t"); 2441 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2442 (void)printf("%s", *cpp); 2443 if (*(cpp + 1)) { 2444 (void) printf(", "); 2445 } 2446 } 2447 (void)fputc('\n', stdout); 2448 return EXIT_SUCCESS; 2449 } 2450 #endif 2451
Indexes created Fri Sep 26 20:09:58 GMT 2025