1 /* $NetBSD: user.c,v 1.135 2021/12/12 14:33:13 nia Exp $ */ 2 3 /* 4 * Copyright (c) 1999 Alistair G. Crooks. All rights reserved. 5 * Copyright (c) 2005 Liam J. Foy. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote 16 * products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 25 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1999\ 35 The NetBSD Foundation, Inc. All rights reserved."); 36 __RCSID("$NetBSD: user.c,v 1.135 2021/12/12 14:33:13 nia Exp $"); 37 #endif 38 39 #include <sys/types.h> 40 #include <sys/param.h> 41 #include <sys/stat.h> 42 #include <sys/wait.h> 43 44 #include <ctype.h> 45 #include <dirent.h> 46 #include <err.h> 47 #include <fcntl.h> 48 #include <grp.h> 49 #ifdef EXTENSIONS 50 #include <login_cap.h> 51 #endif 52 #include <pwd.h> 53 #include <regex.h> 54 #include <stdarg.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <syslog.h> 59 #include <time.h> 60 #include <unistd.h> 61 #include <util.h> 62 #include <errno.h> 63 64 #include "pathnames.h" 65 #include "defs.h" 66 #include "usermgmt.h" 67 68 69 /* this struct describes a uid range */ 70 typedef struct range_t { 71 int r_from; /* low uid */ 72 int r_to; /* high uid */ 73 } range_t; 74 75 typedef struct rangelist_t { 76 unsigned rl_rsize; /* size of range array */ 77 unsigned rl_rc; /* # of ranges */ 78 range_t *rl_rv; /* the ranges */ 79 unsigned rl_defrc; /* # of ranges in defaults */ 80 } rangelist_t; 81 82 /* this struct encapsulates the user and group information */ 83 typedef struct user_t { 84 int u_flags; /* see below */ 85 int u_uid; /* uid of user */ 86 char *u_password; /* encrypted password */ 87 char *u_comment; /* comment field */ 88 char *u_home; /* home directory */ 89 mode_t u_homeperm; /* permissions of home dir */ 90 char *u_primgrp; /* primary group */ 91 int u_groupc; /* # of secondary groups */ 92 const char *u_groupv[NGROUPS_MAX]; /* secondary groups */ 93 char *u_shell; /* user's shell */ 94 char *u_basedir; /* base directory for home */ 95 char *u_expire; /* when password will expire */ 96 char *u_inactive; /* when account will expire */ 97 char *u_skeldir; /* directory for startup files */ 98 char *u_class; /* login class */ 99 rangelist_t u_r; /* list of ranges */ 100 unsigned u_defrc; /* # of ranges in defaults */ 101 int u_preserve; /* preserve uids on deletion */ 102 int u_allow_samba; /* allow trailing '$' for samba login names */ 103 int u_locked; /* user account lock */ 104 } user_t; 105 #define u_rsize u_r.rl_rsize 106 #define u_rc u_r.rl_rc 107 #define u_rv u_r.rl_rv 108 #define u_defrc u_r.rl_defrc 109 110 /* this struct encapsulates the user and group information */ 111 typedef struct group_t { 112 rangelist_t g_r; /* list of ranges */ 113 } group_t; 114 #define g_rsize g_r.rl_rsize 115 #define g_rc g_r.rl_rc 116 #define g_rv g_r.rl_rv 117 #define g_defrc g_r.rl_defrc 118 119 typedef struct def_t { 120 user_t user; 121 group_t group; 122 } def_t; 123 124 /* flags for which fields of the user_t replace the passwd entry */ 125 enum { 126 F_COMMENT = 0x0001, 127 F_DUPUID = 0x0002, 128 F_EXPIRE = 0x0004, 129 F_GROUP = 0x0008, 130 F_HOMEDIR = 0x0010, 131 F_MKDIR = 0x0020, 132 F_INACTIVE = 0x0040, 133 F_PASSWORD = 0x0080, 134 F_SECGROUP = 0x0100, 135 F_SHELL = 0x0200, 136 F_UID = 0x0400, 137 F_USERNAME = 0x0800, 138 F_CLASS = 0x1000 139 }; 140 141 #define UNLOCK 0 142 #define LOCK 1 143 #define LOCKED "*LOCKED*" 144 145 #ifndef DEF_GROUP 146 #define DEF_GROUP "users" 147 #endif 148 149 #ifndef DEF_BASEDIR 150 #define DEF_BASEDIR "/home" 151 #endif 152 153 #ifndef DEF_SKELDIR 154 #define DEF_SKELDIR "/etc/skel" 155 #endif 156 157 #ifndef DEF_SHELL 158 #define DEF_SHELL _PATH_BSHELL 159 #endif 160 161 #ifndef DEF_COMMENT 162 #define DEF_COMMENT "" 163 #endif 164 165 #ifndef DEF_LOWUID 166 #define DEF_LOWUID 1000 167 #endif 168 169 #ifndef DEF_HIGHUID 170 #define DEF_HIGHUID 60000 171 #endif 172 173 #ifndef DEF_INACTIVE 174 #define DEF_INACTIVE 0 175 #endif 176 177 #ifndef DEF_EXPIRE 178 #define DEF_EXPIRE NULL 179 #endif 180 181 #ifndef DEF_CLASS 182 #define DEF_CLASS "" 183 #endif 184 185 #ifndef WAITSECS 186 #define WAITSECS 10 187 #endif 188 189 #ifndef NOBODY_UID 190 #define NOBODY_UID 32767 191 #endif 192 193 #ifndef DEF_HOMEPERM 194 #define DEF_HOMEPERM 0755 195 #endif 196 197 /* some useful constants */ 198 enum { 199 MaxShellNameLen = 256, 200 MaxFileNameLen = MAXPATHLEN, 201 MaxUserNameLen = LOGIN_NAME_MAX - 1, 202 MaxCommandLen = 2048, 203 MaxEntryLen = 2048, 204 PasswordLength = 2048, 205 206 DES_Len = 13, 207 }; 208 209 #define UNSET_INACTIVE "Null (unset)" 210 #define UNSET_EXPIRY "Null (unset)" 211 212 static int asystem(const char *fmt, ...) __printflike(1, 2); 213 static int is_number(const char *); 214 static struct group *find_group_info(const char *); 215 static int verbose; 216 217 static char * 218 skipspace(char *s) 219 { 220 for (; *s && isspace((unsigned char)*s) ; s++) { 221 } 222 return s; 223 } 224 225 static int 226 check_numeric(const char *val, const char *name) 227 { 228 if (!is_number(val)) { 229 errx(EXIT_FAILURE, "When using [-%c %s], " 230 "the %s must be numeric", *name, name, name); 231 } 232 return atoi(val); 233 } 234 235 /* resize *cpp appropriately then assign `n' chars of `s' to it */ 236 static void 237 memsave(char **cpp, const char *s, size_t n) 238 { 239 RENEW(char, *cpp, n + 1, exit(1)); 240 (void)memcpy(*cpp, s, n); 241 (*cpp)[n] = '\0'; 242 } 243 244 /* a replacement for system(3) */ 245 static int 246 asystem(const char *fmt, ...) 247 { 248 va_list vp; 249 char buf[MaxCommandLen]; 250 int ret; 251 252 va_start(vp, fmt); 253 (void)vsnprintf(buf, sizeof(buf), fmt, vp); 254 va_end(vp); 255 if (verbose) { 256 (void)printf("Command: %s\n", buf); 257 } 258 ret = system(buf); 259 if (ret == -1) { 260 warn("Error running `%s'", buf); 261 } else if (WIFSIGNALED(ret)) { 262 warnx("Error running `%s': Signal %d", buf, WTERMSIG(ret)); 263 } else if (WIFEXITED(ret) && WEXITSTATUS(ret) != 0) { 264 warnx("Error running `%s': Exit %d", buf, WEXITSTATUS(ret)); 265 } 266 return ret; 267 } 268 269 /* remove a users home directory, returning 1 for success (ie, no problems encountered) */ 270 static int 271 removehomedir(struct passwd *pwp) 272 { 273 struct stat st; 274 275 /* userid not root? */ 276 if (pwp->pw_uid == 0) { 277 warnx("Not deleting home directory `%s'; userid is 0", pwp->pw_dir); 278 return 0; 279 } 280 281 /* directory exists (and is a directory!) */ 282 if (stat(pwp->pw_dir, &st) < 0) { 283 warn("Cannot access home directory `%s'", pwp->pw_dir); 284 return 0; 285 } 286 if (!S_ISDIR(st.st_mode)) { 287 warnx("Home directory `%s' is not a directory", pwp->pw_dir); 288 return 0; 289 } 290 291 /* userid matches directory owner? */ 292 if (st.st_uid != pwp->pw_uid) { 293 warnx("User `%s' doesn't own directory `%s', not removed", 294 pwp->pw_name, pwp->pw_dir); 295 return 0; 296 } 297 298 (void)seteuid(pwp->pw_uid); 299 /* we add the "|| true" to keep asystem() quiet if there is a non-zero exit status. */ 300 (void)asystem("%s -rf %s > /dev/null 2>&1 || true", _PATH_RM, 301 pwp->pw_dir); 302 (void)seteuid(0); 303 if (rmdir(pwp->pw_dir) < 0 && errno != ENOENT) { 304 warn("Unable to remove all files in `%s'", pwp->pw_dir); 305 return 0; 306 } 307 return 1; 308 } 309 310 /* return 1 if all of `s' is numeric */ 311 static int 312 is_number(const char *s) 313 { 314 for ( ; *s ; s++) { 315 if (!isdigit((unsigned char) *s)) { 316 return 0; 317 } 318 } 319 return 1; 320 } 321 322 /* 323 * check that the effective uid is 0 - called from funcs which will 324 * modify data and config files. 325 */ 326 static void 327 checkeuid(void) 328 { 329 if (geteuid() != 0) { 330 errx(EXIT_FAILURE, "Program must be run as root"); 331 } 332 } 333 334 /* copy any dot files into the user's home directory */ 335 static int 336 copydotfiles(char *skeldir, int uid, int gid, char *dir, mode_t homeperm) 337 { 338 struct dirent *dp; 339 DIR *dirp; 340 int n; 341 342 if ((dirp = opendir(skeldir)) == NULL) { 343 warn("Can't open source . files dir `%s'", skeldir); 344 return 0; 345 } 346 for (n = 0; (dp = readdir(dirp)) != NULL && n == 0 ; ) { 347 if (strcmp(dp->d_name, ".") == 0 || 348 strcmp(dp->d_name, "..") == 0) { 349 continue; 350 } 351 n = 1; 352 } 353 (void)closedir(dirp); 354 if (n == 0) { 355 warnx("No \"dot\" initialisation files found"); 356 } else { 357 (void)asystem("cd %s && %s -rw -pe %s . %s", 358 skeldir, _PATH_PAX, (verbose) ? "-v" : "", dir); 359 } 360 (void)asystem("%s -R -h %d:%d %s", _PATH_CHOWN, uid, gid, dir); 361 (void)asystem("%s -R u+w %s", _PATH_CHMOD, dir); 362 #ifdef EXTENSIONS 363 (void)asystem("%s 0%o %s", _PATH_CHMOD, homeperm, dir); 364 #endif 365 return n; 366 } 367 368 /* create a group entry with gid `gid' */ 369 static int 370 creategid(char *group, int gid, const char *name) 371 { 372 struct stat st; 373 FILE *from; 374 FILE *to; 375 char buf[MaxEntryLen]; 376 char f[MaxFileNameLen]; 377 int fd; 378 int cc; 379 380 if (getgrnam(group) != NULL) { 381 warnx("Can't create group `%s': already exists", group); 382 return 0; 383 } 384 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 385 warn("Can't create group `%s': can't open `%s'", name, 386 _PATH_GROUP); 387 return 0; 388 } 389 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 390 warn("Can't lock `%s'", _PATH_GROUP); 391 (void)fclose(from); 392 return 0; 393 } 394 (void)fstat(fileno(from), &st); 395 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 396 if ((fd = mkstemp(f)) < 0) { 397 warn("Can't create group `%s': mkstemp failed", group); 398 (void)fclose(from); 399 return 0; 400 } 401 if ((to = fdopen(fd, "w")) == NULL) { 402 warn("Can't create group `%s': fdopen `%s' failed", 403 group, f); 404 (void)fclose(from); 405 (void)close(fd); 406 (void)unlink(f); 407 return 0; 408 } 409 while ((cc = fread(buf, sizeof(char), sizeof(buf), from)) > 0) { 410 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 411 warn("Can't create group `%s': short write to `%s'", 412 group, f); 413 (void)fclose(from); 414 (void)close(fd); 415 (void)unlink(f); 416 return 0; 417 } 418 } 419 (void)fprintf(to, "%s:*:%d:%s\n", group, gid, name); 420 (void)fclose(from); 421 (void)fclose(to); 422 if (rename(f, _PATH_GROUP) < 0) { 423 warn("Can't create group `%s': can't rename `%s' to `%s'", 424 group, f, _PATH_GROUP); 425 (void)unlink(f); 426 return 0; 427 } 428 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 429 syslog(LOG_INFO, "New group added: name=%s, gid=%d", group, gid); 430 return 1; 431 } 432 433 /* modify the group entry with name `group' to be newent */ 434 static int 435 modify_gid(char *group, char *newent) 436 { 437 struct stat st; 438 FILE *from; 439 FILE *to; 440 char buf[MaxEntryLen]; 441 char f[MaxFileNameLen]; 442 char *colon; 443 int groupc; 444 int entc; 445 int fd; 446 int cc; 447 448 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 449 warn("Can't modify group `%s': can't open `%s'", 450 group, _PATH_GROUP); 451 return 0; 452 } 453 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 454 warn("Can't modify group `%s': can't lock `%s'", 455 group, _PATH_GROUP); 456 (void)fclose(from); 457 return 0; 458 } 459 (void)fstat(fileno(from), &st); 460 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 461 if ((fd = mkstemp(f)) < 0) { 462 warn("Can't modify group `%s': mkstemp failed", group); 463 (void)fclose(from); 464 return 0; 465 } 466 if ((to = fdopen(fd, "w")) == NULL) { 467 warn("Can't modify group `%s': fdopen `%s' failed", group, f); 468 (void)fclose(from); 469 (void)close(fd); 470 (void)unlink(f); 471 return 0; 472 } 473 groupc = strlen(group); 474 while (fgets(buf, sizeof(buf), from) != NULL) { 475 cc = strlen(buf); 476 if ((colon = strchr(buf, ':')) == NULL) { 477 warnx("Badly formed entry `%s'", buf); 478 continue; 479 } 480 entc = (int)(colon - buf); 481 if (entc == groupc && 482 strncmp(group, buf, (unsigned) entc) == 0) { 483 if (newent == NULL) { 484 struct group *grp_rm; 485 struct passwd *user_pwd; 486 487 /* 488 * Check that the group being removed 489 * isn't any user's Primary group. Just 490 * warn if it is. This could cause problems 491 * if the group GID was reused for a 492 * different purpose. 493 */ 494 495 grp_rm = find_group_info(group); 496 while ((user_pwd = getpwent()) != NULL) { 497 if (user_pwd->pw_gid == grp_rm->gr_gid) { 498 warnx("Warning: group `%s'(%d)" 499 " is the primary group of" 500 " `%s'. Use caution if you" 501 " later add this GID.", 502 grp_rm->gr_name, 503 grp_rm->gr_gid, user_pwd->pw_name); 504 } 505 } 506 endpwent(); 507 continue; 508 } else { 509 cc = strlen(newent); 510 (void)strlcpy(buf, newent, sizeof(buf)); 511 } 512 } 513 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 514 warn("Can't modify group `%s': short write to `%s'", 515 group, f); 516 (void)fclose(from); 517 (void)close(fd); 518 (void)unlink(f); 519 return 0; 520 } 521 } 522 (void)fclose(from); 523 (void)fclose(to); 524 if (rename(f, _PATH_GROUP) < 0) { 525 warn("Can't modify group `%s': can't rename `%s' to `%s'", 526 group, f, _PATH_GROUP); 527 (void)unlink(f); 528 return 0; 529 } 530 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 531 if (newent == NULL) { 532 syslog(LOG_INFO, "group deleted: name=%s", group); 533 } else { 534 syslog(LOG_INFO, "group information modified: name=%s", group); 535 } 536 return 1; 537 } 538 539 /* modify the group entries for all `groups', by adding `user' */ 540 static int 541 append_group(char *user, int ngroups, const char **groups) 542 { 543 struct group *grp; 544 struct stat st; 545 FILE *from; 546 FILE *to; 547 char buf[MaxEntryLen]; 548 char f[MaxFileNameLen]; 549 char *colon; 550 int groupc; 551 int entc; 552 int fd; 553 int nc; 554 int cc; 555 int i; 556 int j; 557 558 for (i = 0 ; i < ngroups ; i++) { 559 if ((grp = getgrnam(groups[i])) == NULL) { 560 warnx("Can't append group `%s' for user `%s'", 561 groups[i], user); 562 } else { 563 for (j = 0 ; grp->gr_mem[j] ; j++) { 564 if (strcmp(user, grp->gr_mem[j]) == 0) { 565 /* already in it */ 566 groups[i] = ""; 567 } 568 } 569 } 570 } 571 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 572 warn("Can't append group(s) for `%s': can't open `%s'", 573 user, _PATH_GROUP); 574 return 0; 575 } 576 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 577 warn("Can't append group(s) for `%s': can't lock `%s'", 578 user, _PATH_GROUP); 579 (void)fclose(from); 580 return 0; 581 } 582 (void)fstat(fileno(from), &st); 583 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 584 if ((fd = mkstemp(f)) < 0) { 585 warn("Can't append group(s) for `%s': mkstemp failed", 586 user); 587 (void)fclose(from); 588 return 0; 589 } 590 if ((to = fdopen(fd, "w")) == NULL) { 591 warn("Can't append group(s) for `%s': fdopen `%s' failed", 592 user, f); 593 (void)fclose(from); 594 (void)close(fd); 595 (void)unlink(f); 596 return 0; 597 } 598 while (fgets(buf, sizeof(buf), from) != NULL) { 599 cc = strlen(buf); 600 if ((colon = strchr(buf, ':')) == NULL) { 601 warnx("Badly formed entry `%s'", buf); 602 continue; 603 } 604 entc = (int)(colon - buf); 605 for (i = 0 ; i < ngroups ; i++) { 606 if ((groupc = strlen(groups[i])) == 0) { 607 continue; 608 } 609 if (entc == groupc && 610 strncmp(groups[i], buf, (unsigned) entc) == 0) { 611 if ((nc = snprintf(&buf[cc - 1], 612 sizeof(buf) - cc + 1, "%s%s\n", 613 (buf[cc - 2] == ':') ? "" : ",", user)) < 0) { 614 warnx("Warning: group `%s' " 615 "entry too long", groups[i]); 616 } 617 cc += nc - 1; 618 } 619 } 620 if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 621 warn("Can't append group(s) for `%s':" 622 " short write to `%s'", user, f); 623 (void)fclose(from); 624 (void)close(fd); 625 (void)unlink(f); 626 return 0; 627 } 628 } 629 (void)fclose(from); 630 (void)fclose(to); 631 if (rename(f, _PATH_GROUP) < 0) { 632 warn("Can't append group(s) for `%s': " 633 "can't rename `%s' to `%s'", user, f, _PATH_GROUP); 634 (void)unlink(f); 635 return 0; 636 } 637 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 638 return 1; 639 } 640 641 /* the valid characters for login and group names */ 642 #define VALID_CHAR(c) (isalnum(c) || (c) == '.' || (c) == '_' || (c) == '-') 643 644 /* return 1 if `login' is a valid login name */ 645 static int 646 valid_login(char *login_name, int allow_samba) 647 { 648 unsigned char *cp; 649 650 /* First character of a login name cannot be '-'. */ 651 if (*login_name == '-') { 652 return 0; 653 } 654 if (strlen(login_name) >= LOGIN_NAME_MAX) { 655 return 0; 656 } 657 for (cp = (unsigned char *)login_name ; *cp ; cp++) { 658 if (!VALID_CHAR(*cp)) { 659 #ifdef EXTENSIONS 660 /* check for a trailing '$' in a Samba user name */ 661 if (allow_samba && *cp == '$' && *(cp + 1) == 0x0) { 662 return 1; 663 } 664 #endif 665 return 0; 666 } 667 } 668 return 1; 669 } 670 671 /* return 1 if `group' is a valid group name */ 672 static int 673 valid_group(char *group) 674 { 675 unsigned char *cp; 676 677 for (cp = (unsigned char *)group; *cp; cp++) { 678 if (!VALID_CHAR(*cp)) { 679 return 0; 680 } 681 } 682 return 1; 683 } 684 685 /* find the next gid in the range lo .. hi */ 686 static int 687 getnextgid(int *gidp, int lo, int hi) 688 { 689 for (*gidp = lo ; *gidp < hi ; *gidp += 1) { 690 if (getgrgid((gid_t)*gidp) == NULL) { 691 return 1; 692 } 693 } 694 return 0; 695 } 696 697 #ifdef EXTENSIONS 698 /* save a range of uids */ 699 static int 700 save_range(rangelist_t *rlp, char *cp) 701 { 702 int from; 703 int to; 704 int i; 705 706 if (rlp->rl_rsize == 0) { 707 rlp->rl_rsize = 32; 708 NEWARRAY(range_t, rlp->rl_rv, rlp->rl_rsize, return(0)); 709 } else if (rlp->rl_rc == rlp->rl_rsize) { 710 rlp->rl_rsize *= 2; 711 RENEW(range_t, rlp->rl_rv, rlp->rl_rsize, return(0)); 712 } 713 if (rlp->rl_rv && sscanf(cp, "%d..%d", &from, &to) == 2) { 714 for (i = rlp->rl_defrc ; i < rlp->rl_rc ; i++) { 715 if (rlp->rl_rv[i].r_from == from && 716 rlp->rl_rv[i].r_to == to) { 717 break; 718 } 719 } 720 if (i == rlp->rl_rc) { 721 rlp->rl_rv[rlp->rl_rc].r_from = from; 722 rlp->rl_rv[rlp->rl_rc].r_to = to; 723 rlp->rl_rc += 1; 724 } 725 } else { 726 warnx("Bad range `%s'", cp); 727 return 0; 728 } 729 return 1; 730 } 731 #endif 732 733 /* set the defaults in the defaults file */ 734 static int 735 setdefaults(user_t *up) 736 { 737 char template[MaxFileNameLen]; 738 FILE *fp; 739 int ret; 740 int fd; 741 #ifdef EXTENSIONS 742 int i; 743 #endif 744 745 (void)snprintf(template, sizeof(template), "%s.XXXXXX", 746 _PATH_USERMGMT_CONF); 747 if ((fd = mkstemp(template)) < 0) { 748 warn("Can't set defaults: can't mkstemp `%s' for writing", 749 _PATH_USERMGMT_CONF); 750 return 0; 751 } 752 if ((fp = fdopen(fd, "w")) == NULL) { 753 warn("Can't set defaults: can't fdopen `%s' for writing", 754 _PATH_USERMGMT_CONF); 755 return 0; 756 } 757 ret = 1; 758 if (fprintf(fp, "group\t\t%s\n", up->u_primgrp) <= 0 || 759 fprintf(fp, "base_dir\t%s\n", up->u_basedir) <= 0 || 760 fprintf(fp, "skel_dir\t%s\n", up->u_skeldir) <= 0 || 761 fprintf(fp, "shell\t\t%s\n", up->u_shell) <= 0 || 762 #ifdef EXTENSIONS 763 fprintf(fp, "class\t\t%s\n", up->u_class) <= 0 || 764 fprintf(fp, "homeperm\t0%o\n", up->u_homeperm) <= 0 || 765 #endif 766 fprintf(fp, "inactive\t%s\n", (up->u_inactive == NULL) ? 767 UNSET_INACTIVE : up->u_inactive) <= 0 || 768 fprintf(fp, "expire\t\t%s\n", (up->u_expire == NULL) ? 769 UNSET_EXPIRY : up->u_expire) <= 0 || 770 fprintf(fp, "preserve\t%s\n", (up->u_preserve == 0) ? 771 "false" : "true") <= 0) { 772 warn("Can't write to `%s'", _PATH_USERMGMT_CONF); 773 ret = 0; 774 } 775 #ifdef EXTENSIONS 776 for (i = (up->u_defrc != up->u_rc) ? up->u_defrc : 0; 777 i < up->u_rc ; i++) { 778 if (fprintf(fp, "range\t\t%d..%d\n", up->u_rv[i].r_from, 779 up->u_rv[i].r_to) <= 0) { 780 warn("Can't set defaults: can't write to `%s'", 781 _PATH_USERMGMT_CONF); 782 ret = 0; 783 } 784 } 785 #endif 786 (void)fclose(fp); 787 if (ret) { 788 ret = ((rename(template, _PATH_USERMGMT_CONF) == 0) && 789 (chmod(_PATH_USERMGMT_CONF, 0644) == 0)); 790 } 791 return ret; 792 } 793 794 /* read the defaults file */ 795 static void 796 read_defaults(def_t *dp) 797 { 798 struct stat st; 799 size_t lineno; 800 size_t len; 801 FILE *fp; 802 char *cp; 803 char *s; 804 user_t *up = &dp->user; 805 group_t *gp = &dp->group; 806 807 (void)memset(dp, 0, sizeof(*dp)); 808 809 memsave(&up->u_primgrp, DEF_GROUP, strlen(DEF_GROUP)); 810 memsave(&up->u_basedir, DEF_BASEDIR, strlen(DEF_BASEDIR)); 811 memsave(&up->u_skeldir, DEF_SKELDIR, strlen(DEF_SKELDIR)); 812 memsave(&up->u_shell, DEF_SHELL, strlen(DEF_SHELL)); 813 memsave(&up->u_comment, DEF_COMMENT, strlen(DEF_COMMENT)); 814 #ifdef EXTENSIONS 815 memsave(&up->u_class, DEF_CLASS, strlen(DEF_CLASS)); 816 #endif 817 up->u_rsize = 16; 818 up->u_defrc = 0; 819 NEWARRAY(range_t, up->u_rv, up->u_rsize, exit(1)); 820 up->u_inactive = DEF_INACTIVE; 821 up->u_expire = DEF_EXPIRE; 822 up->u_homeperm = DEF_HOMEPERM; 823 gp->g_rsize = 16; 824 gp->g_defrc = 0; 825 NEWARRAY(range_t, gp->g_rv, gp->g_rsize, exit(1)); 826 if ((fp = fopen(_PATH_USERMGMT_CONF, "r")) == NULL) { 827 if (stat(_PATH_USERMGMT_CONF, &st) < 0 && !setdefaults(up)) { 828 warn("Can't create `%s' defaults file", 829 _PATH_USERMGMT_CONF); 830 } 831 fp = fopen(_PATH_USERMGMT_CONF, "r"); 832 } 833 if (fp != NULL) { 834 while ((s = fparseln(fp, &len, &lineno, NULL, 0)) != NULL) { 835 if (strncmp(s, "group", 5) == 0) { 836 cp = skipspace(s + 5); 837 memsave(&up->u_primgrp, (char *)cp, strlen(cp)); 838 } else if (strncmp(s, "base_dir", 8) == 0) { 839 cp = skipspace(s + 8); 840 memsave(&up->u_basedir, (char *)cp, strlen(cp)); 841 } else if (strncmp(s, "skel_dir", 8) == 0) { 842 cp = skipspace(s + 8); 843 memsave(&up->u_skeldir, (char *)cp, strlen(cp)); 844 } else if (strncmp(s, "shell", 5) == 0) { 845 cp = skipspace(s + 5); 846 memsave(&up->u_shell, cp, strlen(cp)); 847 #ifdef EXTENSIONS 848 } else if (strncmp((char *)s, "class", 5) == 0) { 849 cp = skipspace(s + 5); 850 memsave(&up->u_class, cp, strlen(cp)); 851 #endif 852 #ifdef EXTENSIONS 853 } else if (strncmp(s, "homeperm", 8) == 0) { 854 for (cp = s + 8; *cp && 855 isspace((unsigned char)*cp); cp++) 856 ; 857 up->u_homeperm = strtoul(cp, NULL, 8); 858 #endif 859 } else if (strncmp(s, "inactive", 8) == 0) { 860 cp = skipspace(s + 8); 861 if (strcmp(cp, UNSET_INACTIVE) == 0) { 862 if (up->u_inactive) { 863 FREE(up->u_inactive); 864 } 865 up->u_inactive = NULL; 866 } else { 867 memsave(&up->u_inactive, cp, strlen(cp)); 868 } 869 #ifdef EXTENSIONS 870 } else if (strncmp(s, "range", 5) == 0) { 871 cp = skipspace(s + 5); 872 (void)save_range(&up->u_r, cp); 873 #endif 874 #ifdef EXTENSIONS 875 } else if (strncmp(s, "preserve", 8) == 0) { 876 cp = skipspace(s + 8); 877 up->u_preserve = 878 (strncmp(cp, "true", 4) == 0) ? 1 : 879 (strncmp(cp, "yes", 3) == 0) ? 1 : atoi(cp); 880 #endif 881 } else if (strncmp(s, "expire", 6) == 0) { 882 cp = skipspace(s + 6); 883 if (strcmp(cp, UNSET_EXPIRY) == 0) { 884 if (up->u_expire) { 885 FREE(up->u_expire); 886 } 887 up->u_expire = NULL; 888 } else { 889 memsave(&up->u_expire, cp, strlen(cp)); 890 } 891 #ifdef EXTENSIONS 892 } else if (strncmp(s, "gid_range", 9) == 0) { 893 cp = skipspace(s + 9); 894 (void)save_range(&gp->g_r, cp); 895 #endif 896 } 897 (void)free(s); 898 } 899 (void)fclose(fp); 900 } 901 if (up->u_rc == 0) { 902 up->u_rv[up->u_rc].r_from = DEF_LOWUID; 903 up->u_rv[up->u_rc].r_to = DEF_HIGHUID; 904 up->u_rc += 1; 905 } 906 up->u_defrc = up->u_rc; 907 } 908 909 /* return the next valid unused uid */ 910 static int 911 getnextuid(int sync_uid_gid, int *uid, int low_uid, int high_uid) 912 { 913 for (*uid = low_uid ; *uid <= high_uid ; (*uid)++) { 914 if (getpwuid((uid_t)(*uid)) == NULL && *uid != NOBODY_UID) { 915 if (sync_uid_gid) { 916 if (getgrgid((gid_t)(*uid)) == NULL) { 917 return 1; 918 } 919 } else { 920 return 1; 921 } 922 } 923 } 924 return 0; 925 } 926 927 /* structure which defines a password type */ 928 typedef struct passwd_type_t { 929 const char *type; /* optional type descriptor */ 930 size_t desc_length; /* length of type descriptor */ 931 size_t length; /* length of password */ 932 const char *regex; /* regexp to output the password */ 933 size_t re_sub; /* subscript of regexp to use */ 934 } passwd_type_t; 935 936 static passwd_type_t passwd_types[] = { 937 { "$argon2i", 8, SIZE_MAX, "\\$[^$]+\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* Argon2i */ 938 { "$argon2id", 9, SIZE_MAX, "\\$[^$]+\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* Argon2id */ 939 { "$argon2d", 8, SIZE_MAX, "\\$[^$]+\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* Argon2d */ 940 { "$sha1", 5, 28, "\\$[^$]+\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* SHA1 */ 941 { "$2a", 3, 53, "\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* Blowfish */ 942 { "$1", 2, 34, NULL, 0 }, /* MD5 */ 943 { "", 0, DES_Len,NULL, 0 }, /* standard DES */ 944 { NULL, (size_t)~0, (size_t)~0, NULL, 0 } 945 /* none - terminate search */ 946 }; 947 948 /* return non-zero if it's a valid password - check length for cipher type */ 949 static int 950 valid_password_length(char *newpasswd) 951 { 952 passwd_type_t *pwtp; 953 regmatch_t matchv[10]; 954 regex_t r; 955 956 for (pwtp = passwd_types; pwtp->desc_length != (size_t)~0; pwtp++) { 957 if (strncmp(newpasswd, pwtp->type, pwtp->desc_length) == 0) { 958 if (pwtp->regex == NULL) { 959 return pwtp->length == SIZE_MAX || 960 strlen(newpasswd) == pwtp->length; 961 } 962 (void)regcomp(&r, pwtp->regex, REG_EXTENDED); 963 if (regexec(&r, newpasswd, 10, matchv, 0) == 0) { 964 regfree(&r); 965 return pwtp->length == SIZE_MAX || 966 (int)(matchv[pwtp->re_sub].rm_eo - 967 matchv[pwtp->re_sub].rm_so) == 968 pwtp->length; 969 } 970 regfree(&r); 971 } 972 } 973 return 0; 974 } 975 976 #ifdef EXTENSIONS 977 /* return 1 if `class' is a valid login class */ 978 static int 979 valid_class(char *class) 980 { 981 login_cap_t *lc; 982 983 if (class == NULL || *class == '\0') { 984 return 1; 985 } 986 /* 987 * Check if /etc/login.conf exists. login_getclass() will 988 * return 1 due to it not existing, so not informing the 989 * user the actual login class does not exist. 990 */ 991 992 if (access(_PATH_LOGINCONF, R_OK) == -1) { 993 warn("Access failed for `%s'; will not validate class `%s'", 994 _PATH_LOGINCONF, class); 995 return 1; 996 } 997 998 if ((lc = login_getclass(class)) != NULL) { 999 login_close(lc); 1000 return 1; 1001 } 1002 return 0; 1003 } 1004 1005 /* return 1 if the `shellname' is a valid user shell */ 1006 static int 1007 valid_shell(const char *shellname) 1008 { 1009 char *shellp; 1010 1011 if (access(_PATH_SHELLS, R_OK) == -1) { 1012 /* Don't exit */ 1013 warn("Access failed for `%s'; will not validate shell `%s'", 1014 _PATH_SHELLS, shellname); 1015 return 1; 1016 } 1017 1018 /* if nologin is used as a shell, consider it a valid shell */ 1019 if (strcmp(shellname, _PATH_SBIN_NOLOGIN) == 0) 1020 return 1; 1021 1022 while ((shellp = getusershell()) != NULL) 1023 if (strcmp(shellp, shellname) == 0) 1024 return 1; 1025 1026 warnx("Shell `%s' not found in `%s'", shellname, _PATH_SHELLS); 1027 1028 return access(shellname, X_OK) != -1; 1029 } 1030 #endif 1031 1032 /* look for a valid time, return 0 if it was specified but bad */ 1033 static int 1034 scantime(time_t *tp, char *s) 1035 { 1036 struct tm tm; 1037 char *ep; 1038 long val; 1039 1040 *tp = 0; 1041 if (s != NULL) { 1042 (void)memset(&tm, 0, sizeof(tm)); 1043 if (strptime(s, "%c", &tm) != NULL) { 1044 *tp = mktime(&tm); 1045 return (*tp == -1) ? 0 : 1; 1046 } else if (strptime(s, "%B %d %Y", &tm) != NULL) { 1047 *tp = mktime(&tm); 1048 return (*tp == -1) ? 0 : 1; 1049 } else { 1050 errno = 0; 1051 *tp = val = strtol(s, &ep, 10); 1052 if (*ep != '\0' || *tp < -1 || errno == ERANGE) { 1053 *tp = 0; 1054 return 0; 1055 } 1056 if (*tp != val) { 1057 return 0; 1058 } 1059 } 1060 } 1061 return 1; 1062 } 1063 1064 /* add a user */ 1065 static int 1066 adduser(char *login_name, user_t *up) 1067 { 1068 struct group *grp; 1069 struct stat st; 1070 time_t expire; 1071 time_t inactive; 1072 char password[PasswordLength + 1]; 1073 char home[MaxFileNameLen]; 1074 char buf[MaxFileNameLen]; 1075 int sync_uid_gid; 1076 int masterfd; 1077 int ptmpfd; 1078 int gid; 1079 int cc; 1080 int i; 1081 1082 if (!valid_login(login_name, up->u_allow_samba)) { 1083 errx(EXIT_FAILURE, "Can't add user `%s': invalid login name", login_name); 1084 } 1085 #ifdef EXTENSIONS 1086 if (!valid_class(up->u_class)) { 1087 errx(EXIT_FAILURE, "Can't add user `%s': no such login class `%s'", 1088 login_name, up->u_class); 1089 } 1090 #endif 1091 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1092 err(EXIT_FAILURE, "Can't add user `%s': can't open `%s'", 1093 login_name, _PATH_MASTERPASSWD); 1094 } 1095 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1096 err(EXIT_FAILURE, "Can't add user `%s': can't lock `%s'", 1097 login_name, _PATH_MASTERPASSWD); 1098 } 1099 pw_init(); 1100 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1101 int serrno = errno; 1102 (void)close(masterfd); 1103 errno = serrno; 1104 err(EXIT_FAILURE, "Can't add user `%s': can't obtain pw_lock", 1105 login_name); 1106 } 1107 while ((cc = read(masterfd, buf, sizeof(buf))) > 0) { 1108 if (write(ptmpfd, buf, (size_t)(cc)) != cc) { 1109 int serrno = errno; 1110 (void)close(masterfd); 1111 (void)close(ptmpfd); 1112 (void)pw_abort(); 1113 errno = serrno; 1114 err(EXIT_FAILURE, "Can't add user `%s': " 1115 "short write to /etc/ptmp", login_name); 1116 } 1117 } 1118 (void)close(masterfd); 1119 /* if no uid was specified, get next one in [low_uid..high_uid] range */ 1120 sync_uid_gid = (strcmp(up->u_primgrp, "=uid") == 0); 1121 if (up->u_uid == -1) { 1122 int got_id = 0; 1123 1124 /* 1125 * Look for a free UID in the command line ranges (if any). 1126 * These start after the ranges specified in the config file. 1127 */ 1128 for (i = up->u_defrc; !got_id && i < up->u_rc ; i++) { 1129 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1130 up->u_rv[i].r_from, up->u_rv[i].r_to); 1131 } 1132 /* 1133 * If there were no free UIDs in the command line ranges, 1134 * try the ranges from the config file (there will always 1135 * be at least one default). 1136 */ 1137 for (i = 0; !got_id && i < up->u_defrc; i++) { 1138 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1139 up->u_rv[i].r_from, up->u_rv[i].r_to); 1140 } 1141 if (!got_id) { 1142 (void)close(ptmpfd); 1143 (void)pw_abort(); 1144 errx(EXIT_FAILURE, "Can't add user `%s': " 1145 "can't get next uid for %d", login_name, 1146 up->u_uid); 1147 } 1148 } 1149 /* check uid isn't already allocated */ 1150 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1151 (void)close(ptmpfd); 1152 (void)pw_abort(); 1153 errx(EXIT_FAILURE, "Can't add user `%s': " 1154 "uid %d is already in use", login_name, up->u_uid); 1155 } 1156 /* if -g=uid was specified, check gid is unused */ 1157 if (sync_uid_gid) { 1158 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1159 (void)close(ptmpfd); 1160 (void)pw_abort(); 1161 errx(EXIT_FAILURE, "Can't add user `%s': " 1162 "gid %d is already in use", login_name, 1163 up->u_uid); 1164 } 1165 gid = up->u_uid; 1166 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1167 gid = grp->gr_gid; 1168 } else if (is_number(up->u_primgrp) && 1169 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1170 gid = grp->gr_gid; 1171 } else { 1172 (void)close(ptmpfd); 1173 (void)pw_abort(); 1174 errx(EXIT_FAILURE, "Can't add user `%s': group %s not found", 1175 login_name, up->u_primgrp); 1176 } 1177 /* check name isn't already in use */ 1178 if (!(up->u_flags & F_DUPUID) && getpwnam(login_name) != NULL) { 1179 (void)close(ptmpfd); 1180 (void)pw_abort(); 1181 errx(EXIT_FAILURE, "Can't add user `%s': " 1182 "`%s' is already a user", login_name, login_name); 1183 } 1184 if (up->u_flags & F_HOMEDIR) { 1185 (void)strlcpy(home, up->u_home, sizeof(home)); 1186 } else { 1187 /* if home directory hasn't been given, make it up */ 1188 (void)snprintf(home, sizeof(home), "%s/%s", up->u_basedir, 1189 login_name); 1190 } 1191 if (up->u_flags & F_SHELL) { 1192 #ifdef EXTENSIONS 1193 if (!valid_shell(up->u_shell)) { 1194 int oerrno = errno; 1195 (void)close(ptmpfd); 1196 (void)pw_abort(); 1197 errno = oerrno; 1198 errx(EXIT_FAILURE, "Can't add user `%s': " 1199 "Cannot access shell `%s'", 1200 login_name, up->u_shell); 1201 } 1202 #endif 1203 } 1204 1205 if (!scantime(&inactive, up->u_inactive)) { 1206 warnx("Warning: inactive time `%s' invalid, password expiry off", 1207 up->u_inactive); 1208 } 1209 if (!scantime(&expire, up->u_expire) || expire == -1) { 1210 warnx("Warning: expire time `%s' invalid, account expiry off", 1211 up->u_expire); 1212 expire = 0; /* Just in case. */ 1213 } 1214 if (lstat(home, &st) < 0 && !(up->u_flags & F_MKDIR)) { 1215 warnx("Warning: home directory `%s' doesn't exist, " 1216 "and -m was not specified", home); 1217 } 1218 password[sizeof(password) - 1] = '\0'; 1219 if (up->u_password != NULL && valid_password_length(up->u_password)) { 1220 (void)strlcpy(password, up->u_password, sizeof(password)); 1221 } else { 1222 (void)memset(password, '*', DES_Len); 1223 password[DES_Len] = 0; 1224 if (up->u_password != NULL) { 1225 warnx("Password `%s' is invalid: setting it to `%s'", 1226 up->u_password, password); 1227 } 1228 } 1229 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1230 login_name, 1231 password, 1232 up->u_uid, 1233 gid, 1234 #ifdef EXTENSIONS 1235 up->u_class, 1236 #else 1237 "", 1238 #endif 1239 (long) inactive, 1240 (long) expire, 1241 up->u_comment, 1242 home, 1243 up->u_shell); 1244 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1245 int serrno = errno; 1246 (void)close(ptmpfd); 1247 (void)pw_abort(); 1248 errno = serrno; 1249 err(EXIT_FAILURE, "Can't add user `%s': write failed", 1250 login_name); 1251 } 1252 if (up->u_flags & F_MKDIR) { 1253 if (lstat(home, &st) == 0) { 1254 (void)close(ptmpfd); 1255 (void)pw_abort(); 1256 errx(EXIT_FAILURE, 1257 "Can't add user `%s': home directory `%s' " 1258 "already exists", login_name, home); 1259 } else { 1260 if (asystem("%s -p %s", _PATH_MKDIR, home) != 0) { 1261 (void)close(ptmpfd); 1262 (void)pw_abort(); 1263 errx(EXIT_FAILURE, "Can't add user `%s': " 1264 "can't mkdir `%s'", login_name, home); 1265 } 1266 (void)copydotfiles(up->u_skeldir, up->u_uid, gid, home, 1267 up->u_homeperm); 1268 } 1269 } 1270 if (strcmp(up->u_primgrp, "=uid") == 0 && 1271 getgrnam(login_name) == NULL && 1272 !creategid(login_name, gid, login_name)) { 1273 (void)close(ptmpfd); 1274 (void)pw_abort(); 1275 errx(EXIT_FAILURE, "Can't add user `%s': can't create gid %d ", 1276 login_name, gid); 1277 } 1278 if (up->u_groupc > 0 && 1279 !append_group(login_name, up->u_groupc, up->u_groupv)) { 1280 (void)close(ptmpfd); 1281 (void)pw_abort(); 1282 errx(EXIT_FAILURE, "Can't add user `%s': can't append " 1283 "to new groups", login_name); 1284 } 1285 (void)close(ptmpfd); 1286 #if PW_MKDB_ARGC == 2 1287 if (pw_mkdb(login_name, 0) < 0) 1288 #else 1289 if (pw_mkdb() < 0) 1290 #endif 1291 { 1292 (void)pw_abort(); 1293 errx(EXIT_FAILURE, "Can't add user `%s': pw_mkdb failed", 1294 login_name); 1295 } 1296 syslog(LOG_INFO, "New user added: name=%s, uid=%d, gid=%d, home=%s, " 1297 "shell=%s", login_name, up->u_uid, gid, home, up->u_shell); 1298 return 1; 1299 } 1300 1301 /* remove a user from the groups file */ 1302 static int 1303 rm_user_from_groups(char *login_name) 1304 { 1305 struct stat st; 1306 regmatch_t matchv[10]; 1307 regex_t r; 1308 FILE *from; 1309 FILE *to; 1310 char line[MaxEntryLen]; 1311 char buf[MaxEntryLen]; 1312 char f[MaxFileNameLen]; 1313 int fd; 1314 int cc; 1315 int sc; 1316 1317 (void)snprintf(line, sizeof(line), "(:|,)(%s)(,|$)", login_name); 1318 if ((sc = regcomp(&r, line, REG_EXTENDED|REG_NEWLINE)) != 0) { 1319 (void)regerror(sc, &r, buf, sizeof(buf)); 1320 warnx("Can't compile regular expression `%s' (%s)", line, 1321 buf); 1322 return 0; 1323 } 1324 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 1325 warn("Can't remove user `%s' from `%s': can't open `%s'", 1326 login_name, _PATH_GROUP, _PATH_GROUP); 1327 return 0; 1328 } 1329 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 1330 warn("Can't remove user `%s' from `%s': can't lock `%s'", 1331 login_name, _PATH_GROUP, _PATH_GROUP); 1332 (void)fclose(from); 1333 return 0; 1334 } 1335 (void)fstat(fileno(from), &st); 1336 (void)snprintf(f, sizeof(f), "%s.XXXXXX", _PATH_GROUP); 1337 if ((fd = mkstemp(f)) < 0) { 1338 warn("Can't remove user `%s' from `%s': mkstemp failed", 1339 login_name, _PATH_GROUP); 1340 (void)fclose(from); 1341 return 0; 1342 } 1343 if ((to = fdopen(fd, "w")) == NULL) { 1344 warn("Can't remove user `%s' from `%s': fdopen `%s' failed", 1345 login_name, _PATH_GROUP, f); 1346 (void)fclose(from); 1347 (void)close(fd); 1348 (void)unlink(f); 1349 return 0; 1350 } 1351 while (fgets(buf, sizeof(buf), from) != NULL) { 1352 cc = strlen(buf); 1353 if (regexec(&r, buf, 10, matchv, 0) == 0) { 1354 if (buf[(int)matchv[1].rm_so] == ',') { 1355 matchv[2].rm_so = matchv[1].rm_so; 1356 } else if (matchv[2].rm_eo != matchv[3].rm_eo) { 1357 matchv[2].rm_eo = matchv[3].rm_eo; 1358 } 1359 cc -= (int) matchv[2].rm_eo; 1360 sc = (int) matchv[2].rm_so; 1361 if (fwrite(buf, sizeof(char), (size_t)sc, to) != sc || 1362 fwrite(&buf[(int)matchv[2].rm_eo], sizeof(char), 1363 (size_t)cc, to) != cc) { 1364 warn("Can't remove user `%s' from `%s': " 1365 "short write to `%s'", login_name, 1366 _PATH_GROUP, f); 1367 (void)fclose(from); 1368 (void)close(fd); 1369 (void)unlink(f); 1370 return 0; 1371 } 1372 } else if (fwrite(buf, sizeof(char), (unsigned) cc, to) != cc) { 1373 warn("Can't remove user `%s' from `%s': " 1374 "short write to `%s'", login_name, _PATH_GROUP, f); 1375 (void)fclose(from); 1376 (void)close(fd); 1377 (void)unlink(f); 1378 return 0; 1379 } 1380 } 1381 (void)fclose(from); 1382 (void)fclose(to); 1383 if (rename(f, _PATH_GROUP) < 0) { 1384 warn("Can't remove user `%s' from `%s': " 1385 "can't rename `%s' to `%s'", 1386 login_name, _PATH_GROUP, f, _PATH_GROUP); 1387 (void)unlink(f); 1388 return 0; 1389 } 1390 (void)chmod(_PATH_GROUP, st.st_mode & 07777); 1391 return 1; 1392 } 1393 1394 /* check that the user or group is local, not from YP/NIS */ 1395 static int 1396 is_local(char *name, const char *file) 1397 { 1398 FILE *fp; 1399 char buf[MaxEntryLen]; 1400 size_t len; 1401 int ret; 1402 1403 if ((fp = fopen(file, "r")) == NULL) { 1404 err(EXIT_FAILURE, "Can't open `%s'", file); 1405 } 1406 len = strlen(name); 1407 for (ret = 0 ; fgets(buf, sizeof(buf), fp) != NULL ; ) { 1408 if (strncmp(buf, name, len) == 0 && buf[len] == ':') { 1409 ret = 1; 1410 break; 1411 } 1412 } 1413 (void)fclose(fp); 1414 return ret; 1415 } 1416 1417 /* modify a user */ 1418 static int 1419 moduser(char *login_name, char *newlogin, user_t *up, int allow_samba) 1420 { 1421 struct passwd *pwp, pw; 1422 struct group *grp; 1423 const char *homedir; 1424 char *locked_pwd; 1425 size_t colonc; 1426 size_t loginc; 1427 size_t len; 1428 FILE *master; 1429 char newdir[MaxFileNameLen]; 1430 char buf[MaxEntryLen]; 1431 char pwbuf[MaxEntryLen]; 1432 char *colon; 1433 int masterfd; 1434 int ptmpfd; 1435 int error; 1436 1437 if (!valid_login(newlogin, allow_samba)) { 1438 errx(EXIT_FAILURE, "Can't modify user `%s': invalid login name", 1439 login_name); 1440 } 1441 if (getpwnam_r(login_name, &pw, pwbuf, sizeof(pwbuf), &pwp) != 0 1442 || pwp == NULL) { 1443 errx(EXIT_FAILURE, "Can't modify user `%s': no such user", 1444 login_name); 1445 } 1446 if (!is_local(login_name, _PATH_MASTERPASSWD)) { 1447 errx(EXIT_FAILURE, "Can't modify user `%s': must be a local user", 1448 login_name); 1449 } 1450 /* keep dir name in case we need it for '-m' */ 1451 homedir = pwp->pw_dir; 1452 1453 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1454 err(EXIT_FAILURE, "Can't modify user `%s': can't open `%s'", 1455 login_name, _PATH_MASTERPASSWD); 1456 } 1457 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1458 err(EXIT_FAILURE, "Can't modify user `%s': can't lock `%s'", 1459 login_name, _PATH_MASTERPASSWD); 1460 } 1461 pw_init(); 1462 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1463 int serrno = errno; 1464 (void)close(masterfd); 1465 errno = serrno; 1466 err(EXIT_FAILURE, "Can't modify user `%s': " 1467 "can't obtain pw_lock", login_name); 1468 } 1469 if ((master = fdopen(masterfd, "r")) == NULL) { 1470 int serrno = errno; 1471 (void)close(masterfd); 1472 (void)close(ptmpfd); 1473 (void)pw_abort(); 1474 errno = serrno; 1475 err(EXIT_FAILURE, "Can't modify user `%s': " 1476 "fdopen fd for %s", login_name, _PATH_MASTERPASSWD); 1477 } 1478 if (up != NULL) { 1479 if (up->u_flags & F_USERNAME) { 1480 /* 1481 * If changing name, 1482 * check new name isn't already in use 1483 */ 1484 if (strcmp(login_name, newlogin) != 0 && 1485 getpwnam(newlogin) != NULL) { 1486 (void)close(ptmpfd); 1487 (void)pw_abort(); 1488 errx(EXIT_FAILURE, "Can't modify user `%s': " 1489 "`%s' is already a user", login_name, 1490 newlogin); 1491 } 1492 pwp->pw_name = newlogin; 1493 1494 /* 1495 * Provide a new directory name in case the 1496 * home directory is to be moved. 1497 */ 1498 if (up->u_flags & F_MKDIR) { 1499 (void)snprintf(newdir, sizeof(newdir), "%s/%s", 1500 up->u_basedir, newlogin); 1501 pwp->pw_dir = newdir; 1502 } 1503 } 1504 if (up->u_flags & F_PASSWORD) { 1505 if (up->u_password != NULL) { 1506 if (!valid_password_length(up->u_password)) { 1507 (void)close(ptmpfd); 1508 (void)pw_abort(); 1509 errx(EXIT_FAILURE, 1510 "Can't modify user `%s': " 1511 "invalid password: `%s'", 1512 login_name, up->u_password); 1513 } 1514 if ((locked_pwd = 1515 strstr(pwp->pw_passwd, LOCKED)) != NULL) { 1516 /* 1517 * account is locked - keep it locked 1518 * and just change the password. 1519 */ 1520 if (asprintf(&locked_pwd, "%s%s", 1521 LOCKED, up->u_password) == -1) { 1522 (void)close(ptmpfd); 1523 (void)pw_abort(); 1524 err(EXIT_FAILURE, 1525 "Can't modify user `%s': " 1526 "asprintf failed", 1527 login_name); 1528 } 1529 pwp->pw_passwd = locked_pwd; 1530 } else { 1531 pwp->pw_passwd = up->u_password; 1532 } 1533 } 1534 } 1535 1536 /* check whether we should lock the account. */ 1537 if (up->u_locked == LOCK) { 1538 /* check to see account if already locked. */ 1539 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1540 != NULL) { 1541 warnx("Account is already locked"); 1542 } else { 1543 if (asprintf(&locked_pwd, "%s%s", LOCKED, 1544 pwp->pw_passwd) == -1) { 1545 (void)close(ptmpfd); 1546 (void)pw_abort(); 1547 err(EXIT_FAILURE, 1548 "Can't modify user `%s': " 1549 "asprintf failed", login_name); 1550 } 1551 pwp->pw_passwd = locked_pwd; 1552 } 1553 } else if (up->u_locked == UNLOCK) { 1554 if ((locked_pwd = strstr(pwp->pw_passwd, LOCKED)) 1555 == NULL) { 1556 warnx("Can't modify user `%s': " 1557 "account is not locked", login_name); 1558 } else { 1559 pwp->pw_passwd = locked_pwd + strlen(LOCKED); 1560 } 1561 } 1562 1563 if (up->u_flags & F_UID) { 1564 /* check uid isn't already allocated */ 1565 if (!(up->u_flags & F_DUPUID) && 1566 getpwuid((uid_t)(up->u_uid)) != NULL) { 1567 (void)close(ptmpfd); 1568 (void)pw_abort(); 1569 errx(EXIT_FAILURE, "Can't modify user `%s': " 1570 "uid `%d' is already in use", login_name, 1571 up->u_uid); 1572 } 1573 pwp->pw_uid = up->u_uid; 1574 } 1575 if (up->u_flags & F_GROUP) { 1576 /* if -g=uid was specified, check gid is unused */ 1577 if (strcmp(up->u_primgrp, "=uid") == 0) { 1578 if (getgrgid((gid_t)(pwp->pw_uid)) != NULL) { 1579 (void)close(ptmpfd); 1580 (void)pw_abort(); 1581 errx(EXIT_FAILURE, 1582 "Can't modify user `%s': " 1583 "gid %d is already in use", 1584 login_name, pwp->pw_uid); 1585 } 1586 pwp->pw_gid = pwp->pw_uid; 1587 if (!creategid(newlogin, pwp->pw_uid, "")) { 1588 errx(EXIT_FAILURE, 1589 "Could not create group %s " 1590 "with uid %d", newlogin, 1591 up->u_uid); 1592 } 1593 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1594 pwp->pw_gid = grp->gr_gid; 1595 } else if (is_number(up->u_primgrp) && 1596 (grp = getgrgid( 1597 (gid_t)atoi(up->u_primgrp))) != NULL) { 1598 pwp->pw_gid = grp->gr_gid; 1599 } else { 1600 (void)close(ptmpfd); 1601 (void)pw_abort(); 1602 errx(EXIT_FAILURE, "Can't modify user `%s': " 1603 "group %s not found", login_name, 1604 up->u_primgrp); 1605 } 1606 } 1607 if (up->u_flags & F_INACTIVE) { 1608 if (!scantime(&pwp->pw_change, up->u_inactive)) { 1609 warnx("Warning: inactive time `%s' invalid, " 1610 "password expiry off", 1611 up->u_inactive); 1612 } 1613 } 1614 if (up->u_flags & F_EXPIRE) { 1615 if (!scantime(&pwp->pw_expire, up->u_expire) || 1616 pwp->pw_expire == -1) { 1617 warnx("Warning: expire time `%s' invalid, " 1618 "account expiry off", 1619 up->u_expire); 1620 pwp->pw_expire = 0; 1621 } 1622 } 1623 if (up->u_flags & F_COMMENT) { 1624 pwp->pw_gecos = up->u_comment; 1625 } 1626 if (up->u_flags & F_HOMEDIR) { 1627 pwp->pw_dir = up->u_home; 1628 } 1629 if (up->u_flags & F_SHELL) { 1630 #ifdef EXTENSIONS 1631 if (!valid_shell(up->u_shell)) { 1632 int oerrno = errno; 1633 (void)close(ptmpfd); 1634 (void)pw_abort(); 1635 errno = oerrno; 1636 errx(EXIT_FAILURE, "Can't modify user `%s': " 1637 "Cannot access shell `%s'", 1638 login_name, up->u_shell); 1639 } 1640 pwp->pw_shell = up->u_shell; 1641 #else 1642 pwp->pw_shell = up->u_shell; 1643 #endif 1644 } 1645 #ifdef EXTENSIONS 1646 if (up->u_flags & F_CLASS) { 1647 if (!valid_class(up->u_class)) { 1648 (void)close(ptmpfd); 1649 (void)pw_abort(); 1650 errx(EXIT_FAILURE, "Can't modify user `%s': " 1651 "no such login class `%s'", login_name, 1652 up->u_class); 1653 } 1654 pwp->pw_class = up->u_class; 1655 } 1656 #endif 1657 } 1658 loginc = strlen(login_name); 1659 while (fgets(buf, sizeof(buf), master) != NULL) { 1660 if ((colon = strchr(buf, ':')) == NULL) { 1661 warnx("Malformed entry `%s'. Skipping", buf); 1662 continue; 1663 } 1664 colonc = (size_t)(colon - buf); 1665 if (strncmp(login_name, buf, loginc) == 0 && loginc == colonc) { 1666 if (up != NULL) { 1667 len = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:" 1668 #ifdef EXTENSIONS 1669 "%s" 1670 #endif 1671 ":%ld:%ld:%s:%s:%s\n", 1672 newlogin, 1673 pwp->pw_passwd, 1674 pwp->pw_uid, 1675 pwp->pw_gid, 1676 #ifdef EXTENSIONS 1677 pwp->pw_class, 1678 #endif 1679 (long)pwp->pw_change, 1680 (long)pwp->pw_expire, 1681 pwp->pw_gecos, 1682 pwp->pw_dir, 1683 pwp->pw_shell); 1684 if (write(ptmpfd, buf, len) != len) { 1685 int serrno = errno; 1686 (void)close(ptmpfd); 1687 (void)pw_abort(); 1688 errno = serrno; 1689 err(EXIT_FAILURE, "Can't modify user " 1690 "`%s': write", login_name); 1691 } 1692 } 1693 } else { 1694 len = strlen(buf); 1695 if (write(ptmpfd, buf, len) != len) { 1696 int serrno = errno; 1697 (void)close(masterfd); 1698 (void)close(ptmpfd); 1699 (void)pw_abort(); 1700 errno = serrno; 1701 err(EXIT_FAILURE, "Can't modify `%s': " 1702 "write", login_name); 1703 } 1704 } 1705 } 1706 if (up != NULL) { 1707 if ((up->u_flags & F_MKDIR) && 1708 asystem("%s %s %s", _PATH_MV, homedir, pwp->pw_dir) != 0) { 1709 (void)close(ptmpfd); 1710 (void)pw_abort(); 1711 errx(EXIT_FAILURE, "Can't modify user `%s': " 1712 "can't move `%s' to `%s'", 1713 login_name, homedir, pwp->pw_dir); 1714 } 1715 if (up->u_groupc > 0 && 1716 !append_group(newlogin, up->u_groupc, up->u_groupv)) { 1717 (void)close(ptmpfd); 1718 (void)pw_abort(); 1719 errx(EXIT_FAILURE, "Can't modify user `%s': " 1720 "can't append `%s' to new groups", 1721 login_name, newlogin); 1722 } 1723 } 1724 (void)close(ptmpfd); 1725 (void)fclose(master); 1726 #if PW_MKDB_ARGC == 2 1727 if (up != NULL && strcmp(login_name, newlogin) == 0) { 1728 error = pw_mkdb(login_name, 0); 1729 } else { 1730 error = pw_mkdb(NULL, 0); 1731 } 1732 #else 1733 error = pw_mkdb(); 1734 #endif 1735 if (error < 0) { 1736 (void)pw_abort(); 1737 errx(EXIT_FAILURE, "Can't modify user `%s': pw_mkdb failed", 1738 login_name); 1739 } 1740 if (up == NULL) { 1741 syslog(LOG_INFO, "User removed: name=%s", login_name); 1742 } else if (strcmp(login_name, newlogin) == 0) { 1743 syslog(LOG_INFO, "User information modified: name=%s, uid=%d, " 1744 "gid=%d, home=%s, shell=%s", 1745 login_name, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, 1746 pwp->pw_shell); 1747 } else { 1748 syslog(LOG_INFO, "User information modified: name=%s, " 1749 "new name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1750 login_name, newlogin, pwp->pw_uid, pwp->pw_gid, 1751 pwp->pw_dir, pwp->pw_shell); 1752 } 1753 return 1; 1754 } 1755 1756 #ifdef EXTENSIONS 1757 /* see if we can find out the user struct */ 1758 static struct passwd * 1759 find_user_info(const char *name) 1760 { 1761 struct passwd *pwp; 1762 1763 if ((pwp = getpwnam(name)) != NULL) { 1764 return pwp; 1765 } 1766 if (is_number(name) && (pwp = getpwuid((uid_t)atoi(name))) != NULL) { 1767 return pwp; 1768 } 1769 return NULL; 1770 } 1771 #endif 1772 1773 /* see if we can find out the group struct */ 1774 static struct group * 1775 find_group_info(const char *name) 1776 { 1777 struct group *grp; 1778 1779 if ((grp = getgrnam(name)) != NULL) { 1780 return grp; 1781 } 1782 if (is_number(name) && (grp = getgrgid((gid_t)atoi(name))) != NULL) { 1783 return grp; 1784 } 1785 return NULL; 1786 } 1787 1788 /* print out usage message, and then exit */ 1789 void 1790 usermgmt_usage(const char *prog) 1791 { 1792 if (strcmp(prog, "useradd") == 0) { 1793 (void)fprintf(stderr, "usage: %s -D [-F] [-b base-dir] " 1794 "[-e expiry-time] [-f inactive-time]\n" 1795 "\t[-g gid | name | =uid] [-k skel-dir] [-L login-class]\n" 1796 "\t[-M homeperm] [-r lowuid..highuid] [-s shell]\n", prog); 1797 (void)fprintf(stderr, "usage: %s [-moSv] [-b base-dir] " 1798 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1799 "\t[-f inactive-time] [-G secondary-group] " 1800 "[-g gid | name | =uid]\n" 1801 "\t[-k skeletondir] [-L login-class] [-M homeperm] " 1802 "[-p password]\n" 1803 "\t[-r lowuid..highuid] [-s shell] [-u uid] user\n", 1804 prog); 1805 } else if (strcmp(prog, "usermod") == 0) { 1806 (void)fprintf(stderr, "usage: %s [-FmoSv] [-C yes/no] " 1807 "[-c comment] [-d home-dir] [-e expiry-time]\n" 1808 "\t[-f inactive] [-G secondary-group] " 1809 "[-g gid | name | =uid]\n" 1810 "\t[-L login-class] [-l new-login] [-p password] " 1811 "[-s shell] [-u uid]\n" 1812 "\tuser\n", prog); 1813 } else if (strcmp(prog, "userdel") == 0) { 1814 (void)fprintf(stderr, "usage: %s -D [-p preserve-value]\n", prog); 1815 (void)fprintf(stderr, 1816 "usage: %s [-rSv] [-p preserve-value] user\n", prog); 1817 #ifdef EXTENSIONS 1818 } else if (strcmp(prog, "userinfo") == 0) { 1819 (void)fprintf(stderr, "usage: %s [-e] user\n", prog); 1820 #endif 1821 } else if (strcmp(prog, "groupadd") == 0) { 1822 (void)fprintf(stderr, "usage: %s [-ov] [-g gid]" 1823 " [-r lowgid..highgid] group\n", prog); 1824 } else if (strcmp(prog, "groupdel") == 0) { 1825 (void)fprintf(stderr, "usage: %s [-v] group\n", prog); 1826 } else if (strcmp(prog, "groupmod") == 0) { 1827 (void)fprintf(stderr, 1828 "usage: %s [-ov] [-g gid] [-n newname] group\n", prog); 1829 } else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) { 1830 (void)fprintf(stderr, 1831 "usage: %s ( add | del | mod | info ) ...\n", prog); 1832 #ifdef EXTENSIONS 1833 } else if (strcmp(prog, "groupinfo") == 0) { 1834 (void)fprintf(stderr, "usage: %s [-ev] group\n", prog); 1835 #endif 1836 } 1837 exit(EXIT_FAILURE); 1838 /* NOTREACHED */ 1839 } 1840 1841 #ifdef EXTENSIONS 1842 #define ADD_OPT_EXTENSIONS "M:p:r:vL:S" 1843 #else 1844 #define ADD_OPT_EXTENSIONS 1845 #endif 1846 1847 int 1848 useradd(int argc, char **argv) 1849 { 1850 def_t def; 1851 user_t *up = &def.user; 1852 int defaultfield; 1853 int bigD; 1854 int c; 1855 #ifdef EXTENSIONS 1856 int i; 1857 #endif 1858 1859 read_defaults(&def); 1860 up->u_uid = -1; 1861 defaultfield = bigD = 0; 1862 while ((c = getopt(argc, argv, "DFG:b:c:d:e:f:g:k:mou:s:" 1863 ADD_OPT_EXTENSIONS)) != -1) { 1864 switch(c) { 1865 case 'D': 1866 bigD = 1; 1867 break; 1868 case 'F': 1869 /* 1870 * Setting -1 will force the new user to 1871 * change their password as soon as they 1872 * next log in - passwd(5). 1873 */ 1874 defaultfield = 1; 1875 memsave(&up->u_inactive, "-1", strlen("-1")); 1876 break; 1877 case 'G': 1878 while (up->u_groupc < NGROUPS_MAX && 1879 (up->u_groupv[up->u_groupc] = strsep(&optarg, ",")) != NULL) { 1880 if (up->u_groupv[up->u_groupc][0] != 0) { 1881 up->u_groupc++; 1882 } 1883 } 1884 if (optarg != NULL) { 1885 warnx("Truncated list of secondary groups " 1886 "to %d entries", NGROUPS_MAX); 1887 } 1888 break; 1889 #ifdef EXTENSIONS 1890 case 'S': 1891 up->u_allow_samba = 1; 1892 break; 1893 #endif 1894 case 'b': 1895 defaultfield = 1; 1896 memsave(&up->u_basedir, optarg, strlen(optarg)); 1897 break; 1898 case 'c': 1899 memsave(&up->u_comment, optarg, strlen(optarg)); 1900 break; 1901 case 'd': 1902 memsave(&up->u_home, optarg, strlen(optarg)); 1903 up->u_flags |= F_HOMEDIR; 1904 break; 1905 case 'e': 1906 defaultfield = 1; 1907 memsave(&up->u_expire, optarg, strlen(optarg)); 1908 break; 1909 case 'f': 1910 defaultfield = 1; 1911 memsave(&up->u_inactive, optarg, strlen(optarg)); 1912 break; 1913 case 'g': 1914 defaultfield = 1; 1915 memsave(&up->u_primgrp, optarg, strlen(optarg)); 1916 break; 1917 case 'k': 1918 defaultfield = 1; 1919 memsave(&up->u_skeldir, optarg, strlen(optarg)); 1920 break; 1921 #ifdef EXTENSIONS 1922 case 'L': 1923 defaultfield = 1; 1924 memsave(&up->u_class, optarg, strlen(optarg)); 1925 break; 1926 #endif 1927 case 'm': 1928 up->u_flags |= F_MKDIR; 1929 break; 1930 #ifdef EXTENSIONS 1931 case 'M': 1932 defaultfield = 1; 1933 up->u_homeperm = strtoul(optarg, NULL, 8); 1934 break; 1935 #endif 1936 case 'o': 1937 up->u_flags |= F_DUPUID; 1938 break; 1939 #ifdef EXTENSIONS 1940 case 'p': 1941 memsave(&up->u_password, optarg, strlen(optarg)); 1942 break; 1943 #endif 1944 #ifdef EXTENSIONS 1945 case 'r': 1946 defaultfield = 1; 1947 (void)save_range(&up->u_r, optarg); 1948 break; 1949 #endif 1950 case 's': 1951 up->u_flags |= F_SHELL; 1952 defaultfield = 1; 1953 memsave(&up->u_shell, optarg, strlen(optarg)); 1954 break; 1955 case 'u': 1956 up->u_uid = check_numeric(optarg, "uid"); 1957 break; 1958 #ifdef EXTENSIONS 1959 case 'v': 1960 verbose = 1; 1961 break; 1962 #endif 1963 default: 1964 usermgmt_usage("useradd"); 1965 /* NOTREACHED */ 1966 } 1967 } 1968 if (bigD) { 1969 if (defaultfield) { 1970 checkeuid(); 1971 return setdefaults(up) ? EXIT_SUCCESS : EXIT_FAILURE; 1972 } 1973 (void)printf("group\t\t%s\n", up->u_primgrp); 1974 (void)printf("base_dir\t%s\n", up->u_basedir); 1975 (void)printf("skel_dir\t%s\n", up->u_skeldir); 1976 (void)printf("shell\t\t%s\n", up->u_shell); 1977 #ifdef EXTENSIONS 1978 (void)printf("class\t\t%s\n", up->u_class); 1979 (void)printf("homeperm\t0%o\n", up->u_homeperm); 1980 #endif 1981 (void)printf("inactive\t%s\n", (up->u_inactive == NULL) ? 1982 UNSET_INACTIVE : up->u_inactive); 1983 (void)printf("expire\t\t%s\n", (up->u_expire == NULL) ? 1984 UNSET_EXPIRY : up->u_expire); 1985 #ifdef EXTENSIONS 1986 for (i = 0 ; i < up->u_rc ; i++) { 1987 (void)printf("range\t\t%d..%d\n", 1988 up->u_rv[i].r_from, up->u_rv[i].r_to); 1989 } 1990 #endif 1991 return EXIT_SUCCESS; 1992 } 1993 argc -= optind; 1994 argv += optind; 1995 if (argc != 1) { 1996 usermgmt_usage("useradd"); 1997 } 1998 checkeuid(); 1999 openlog("useradd", LOG_PID, LOG_USER); 2000 return adduser(*argv, up) ? EXIT_SUCCESS : EXIT_FAILURE; 2001 } 2002 2003 #ifdef EXTENSIONS 2004 #define MOD_OPT_EXTENSIONS "p:vL:S" 2005 #else 2006 #define MOD_OPT_EXTENSIONS 2007 #endif 2008 2009 int 2010 usermod(int argc, char **argv) 2011 { 2012 def_t def; 2013 user_t *up = &def.user; 2014 char newuser[MaxUserNameLen + 1]; 2015 int c, have_new_user; 2016 2017 (void)memset(newuser, 0, sizeof(newuser)); 2018 read_defaults(&def); 2019 have_new_user = 0; 2020 up->u_locked = -1; 2021 while ((c = getopt(argc, argv, "C:FG:c:d:e:f:g:l:mos:u:" 2022 MOD_OPT_EXTENSIONS)) != -1) { 2023 switch(c) { 2024 case 'G': 2025 while (up->u_groupc < NGROUPS_MAX && 2026 (up->u_groupv[up->u_groupc] = 2027 strsep(&optarg, ",")) != NULL) { 2028 if (up->u_groupv[up->u_groupc][0] != 0) { 2029 up->u_groupc++; 2030 } 2031 } 2032 if (optarg != NULL) { 2033 warnx("Truncated list of secondary groups " 2034 "to %d entries", NGROUPS_MAX); 2035 } 2036 up->u_flags |= F_SECGROUP; 2037 break; 2038 #ifdef EXTENSIONS 2039 case 'S': 2040 up->u_allow_samba = 1; 2041 break; 2042 #endif 2043 case 'c': 2044 memsave(&up->u_comment, optarg, strlen(optarg)); 2045 up->u_flags |= F_COMMENT; 2046 break; 2047 case 'C': 2048 if (strcasecmp(optarg, "yes") == 0) { 2049 up->u_locked = LOCK; 2050 } else if (strcasecmp(optarg, "no") == 0) { 2051 up->u_locked = UNLOCK; 2052 } else { 2053 /* No idea. */ 2054 errx(EXIT_FAILURE, 2055 "Please type 'yes' or 'no'"); 2056 } 2057 break; 2058 case 'F': 2059 memsave(&up->u_inactive, "-1", strlen("-1")); 2060 up->u_flags |= F_INACTIVE; 2061 break; 2062 case 'd': 2063 memsave(&up->u_home, optarg, strlen(optarg)); 2064 up->u_flags |= F_HOMEDIR; 2065 break; 2066 case 'e': 2067 memsave(&up->u_expire, optarg, strlen(optarg)); 2068 up->u_flags |= F_EXPIRE; 2069 break; 2070 case 'f': 2071 memsave(&up->u_inactive, optarg, strlen(optarg)); 2072 up->u_flags |= F_INACTIVE; 2073 break; 2074 case 'g': 2075 memsave(&up->u_primgrp, optarg, strlen(optarg)); 2076 up->u_flags |= F_GROUP; 2077 break; 2078 case 'l': 2079 (void)strlcpy(newuser, optarg, sizeof(newuser)); 2080 have_new_user = 1; 2081 up->u_flags |= F_USERNAME; 2082 break; 2083 #ifdef EXTENSIONS 2084 case 'L': 2085 memsave(&up->u_class, optarg, strlen(optarg)); 2086 up->u_flags |= F_CLASS; 2087 break; 2088 #endif 2089 case 'm': 2090 up->u_flags |= F_MKDIR; 2091 break; 2092 case 'o': 2093 up->u_flags |= F_DUPUID; 2094 break; 2095 #ifdef EXTENSIONS 2096 case 'p': 2097 memsave(&up->u_password, optarg, strlen(optarg)); 2098 up->u_flags |= F_PASSWORD; 2099 break; 2100 #endif 2101 case 's': 2102 memsave(&up->u_shell, optarg, strlen(optarg)); 2103 up->u_flags |= F_SHELL; 2104 break; 2105 case 'u': 2106 up->u_uid = check_numeric(optarg, "uid"); 2107 up->u_flags |= F_UID; 2108 break; 2109 #ifdef EXTENSIONS 2110 case 'v': 2111 verbose = 1; 2112 break; 2113 #endif 2114 default: 2115 usermgmt_usage("usermod"); 2116 /* NOTREACHED */ 2117 } 2118 } 2119 if ((up->u_flags & F_MKDIR) && !(up->u_flags & F_HOMEDIR) && 2120 !(up->u_flags & F_USERNAME)) { 2121 warnx("Option 'm' useless without 'd' or 'l' -- ignored"); 2122 up->u_flags &= ~F_MKDIR; 2123 } 2124 argc -= optind; 2125 argv += optind; 2126 if (argc != 1) { 2127 usermgmt_usage("usermod"); 2128 } 2129 checkeuid(); 2130 openlog("usermod", LOG_PID, LOG_USER); 2131 return moduser(*argv, (have_new_user) ? newuser : *argv, up, 2132 up->u_allow_samba) ? EXIT_SUCCESS : EXIT_FAILURE; 2133 } 2134 2135 #ifdef EXTENSIONS 2136 #define DEL_OPT_EXTENSIONS "Dp:vS" 2137 #else 2138 #define DEL_OPT_EXTENSIONS 2139 #endif 2140 2141 int 2142 userdel(int argc, char **argv) 2143 { 2144 struct passwd *pwp; 2145 def_t def; 2146 user_t *up = &def.user; 2147 char password[PasswordLength + 1]; 2148 int defaultfield; 2149 int rmhome; 2150 int bigD; 2151 int c; 2152 2153 read_defaults(&def); 2154 defaultfield = bigD = rmhome = 0; 2155 while ((c = getopt(argc, argv, "r" DEL_OPT_EXTENSIONS)) != -1) { 2156 switch(c) { 2157 #ifdef EXTENSIONS 2158 case 'D': 2159 bigD = 1; 2160 break; 2161 #endif 2162 #ifdef EXTENSIONS 2163 case 'S': 2164 up->u_allow_samba = 1; 2165 break; 2166 #endif 2167 #ifdef EXTENSIONS 2168 case 'p': 2169 defaultfield = 1; 2170 up->u_preserve = (strcmp(optarg, "true") == 0) ? 1 : 2171 (strcmp(optarg, "yes") == 0) ? 1 : 2172 atoi(optarg); 2173 break; 2174 #endif 2175 case 'r': 2176 rmhome = 1; 2177 break; 2178 #ifdef EXTENSIONS 2179 case 'v': 2180 verbose = 1; 2181 break; 2182 #endif 2183 default: 2184 usermgmt_usage("userdel"); 2185 /* NOTREACHED */ 2186 } 2187 } 2188 #ifdef EXTENSIONS 2189 if (bigD) { 2190 if (defaultfield) { 2191 checkeuid(); 2192 return setdefaults(up) ? EXIT_SUCCESS : EXIT_FAILURE; 2193 } 2194 (void)printf("preserve\t%s\n", (up->u_preserve) ? "true" : 2195 "false"); 2196 return EXIT_SUCCESS; 2197 } 2198 #endif 2199 argc -= optind; 2200 argv += optind; 2201 if (argc != 1) { 2202 usermgmt_usage("userdel"); 2203 } 2204 checkeuid(); 2205 if ((pwp = getpwnam(*argv)) == NULL) { 2206 warnx("No such user `%s'", *argv); 2207 return EXIT_FAILURE; 2208 } 2209 if (rmhome) { 2210 (void)removehomedir(pwp); 2211 } 2212 if (up->u_preserve) { 2213 up->u_flags |= F_SHELL; 2214 memsave(&up->u_shell, _PATH_SBIN_NOLOGIN, 2215 strlen(_PATH_SBIN_NOLOGIN)); 2216 (void)memset(password, '*', DES_Len); 2217 password[DES_Len] = 0; 2218 memsave(&up->u_password, password, strlen(password)); 2219 up->u_flags |= F_PASSWORD; 2220 openlog("userdel", LOG_PID, LOG_USER); 2221 return moduser(*argv, *argv, up, up->u_allow_samba) ? 2222 EXIT_SUCCESS : EXIT_FAILURE; 2223 } 2224 if (!rm_user_from_groups(*argv)) { 2225 return 0; 2226 } 2227 openlog("userdel", LOG_PID, LOG_USER); 2228 return moduser(*argv, *argv, NULL, up->u_allow_samba) ? 2229 EXIT_SUCCESS : EXIT_FAILURE; 2230 } 2231 2232 #ifdef EXTENSIONS 2233 #define GROUP_ADD_OPT_EXTENSIONS "r:v" 2234 #else 2235 #define GROUP_ADD_OPT_EXTENSIONS 2236 #endif 2237 2238 /* add a group */ 2239 int 2240 groupadd(int argc, char **argv) 2241 { 2242 def_t def; 2243 group_t *gp = &def.group; 2244 int dupgid; 2245 int gid; 2246 int c; 2247 2248 gid = -1; 2249 dupgid = 0; 2250 read_defaults(&def); 2251 while ((c = getopt(argc, argv, "g:o" GROUP_ADD_OPT_EXTENSIONS)) != -1) { 2252 switch(c) { 2253 case 'g': 2254 gid = check_numeric(optarg, "gid"); 2255 break; 2256 case 'o': 2257 dupgid = 1; 2258 break; 2259 #ifdef EXTENSIONS 2260 case 'r': 2261 (void)save_range(&gp->g_r, optarg); 2262 break; 2263 case 'v': 2264 verbose = 1; 2265 break; 2266 #endif 2267 default: 2268 usermgmt_usage("groupadd"); 2269 /* NOTREACHED */ 2270 } 2271 } 2272 argc -= optind; 2273 argv += optind; 2274 if (argc != 1) { 2275 usermgmt_usage("groupadd"); 2276 } 2277 if (gp->g_rc == 0) { 2278 gp->g_rv[gp->g_rc].r_from = DEF_LOWUID; 2279 gp->g_rv[gp->g_rc].r_to = DEF_HIGHUID; 2280 gp->g_rc += 1; 2281 } 2282 gp->g_defrc = gp->g_rc; 2283 checkeuid(); 2284 if (gid == -1) { 2285 int got_id = 0; 2286 int i; 2287 2288 /* 2289 * Look for a free GID in the command line ranges (if any). 2290 * These start after the ranges specified in the config file. 2291 */ 2292 for (i = gp->g_defrc; !got_id && i < gp->g_rc ; i++) { 2293 got_id = getnextgid(&gid, 2294 gp->g_rv[i].r_from, gp->g_rv[i].r_to); 2295 } 2296 /* 2297 * If there were no free GIDs in the command line ranges, 2298 * try the ranges from the config file (there will always 2299 * be at least one default). 2300 */ 2301 for (i = 0; !got_id && i < gp->g_defrc; i++) { 2302 got_id = getnextgid(&gid, 2303 gp->g_rv[i].r_from, gp->g_rv[i].r_to); 2304 } 2305 if (!got_id) 2306 errx(EXIT_FAILURE, "Can't add group: can't get next gid"); 2307 } 2308 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 2309 errx(EXIT_FAILURE, "Can't add group: gid %d is a duplicate", 2310 gid); 2311 } 2312 if (!valid_group(*argv)) { 2313 warnx("Invalid group name `%s'", *argv); 2314 } 2315 openlog("groupadd", LOG_PID, LOG_USER); 2316 if (!creategid(*argv, gid, "")) 2317 exit(EXIT_FAILURE); 2318 2319 return EXIT_SUCCESS; 2320 } 2321 2322 #ifdef EXTENSIONS 2323 #define GROUP_DEL_OPT_EXTENSIONS "v" 2324 #else 2325 #define GROUP_DEL_OPT_EXTENSIONS 2326 #endif 2327 2328 /* remove a group */ 2329 int 2330 groupdel(int argc, char **argv) 2331 { 2332 int c; 2333 2334 while ((c = getopt(argc, argv, "" GROUP_DEL_OPT_EXTENSIONS)) != -1) { 2335 switch(c) { 2336 #ifdef EXTENSIONS 2337 case 'v': 2338 verbose = 1; 2339 break; 2340 #endif 2341 default: 2342 usermgmt_usage("groupdel"); 2343 /* NOTREACHED */ 2344 } 2345 } 2346 argc -= optind; 2347 argv += optind; 2348 if (argc != 1) { 2349 usermgmt_usage("groupdel"); 2350 } 2351 if (getgrnam(*argv) == NULL) { 2352 errx(EXIT_FAILURE, "No such group `%s'", *argv); 2353 } 2354 checkeuid(); 2355 openlog("groupdel", LOG_PID, LOG_USER); 2356 if (!modify_gid(*argv, NULL)) 2357 exit(EXIT_FAILURE); 2358 2359 return EXIT_SUCCESS; 2360 } 2361 2362 #ifdef EXTENSIONS 2363 #define GROUP_MOD_OPT_EXTENSIONS "v" 2364 #else 2365 #define GROUP_MOD_OPT_EXTENSIONS 2366 #endif 2367 2368 /* modify a group */ 2369 int 2370 groupmod(int argc, char **argv) 2371 { 2372 struct group *grp; 2373 char buf[MaxEntryLen]; 2374 char *newname; 2375 char **cpp; 2376 int dupgid; 2377 int gid; 2378 int cc; 2379 int c; 2380 2381 gid = -1; 2382 dupgid = 0; 2383 newname = NULL; 2384 while ((c = getopt(argc, argv, "g:on:" GROUP_MOD_OPT_EXTENSIONS)) != -1) { 2385 switch(c) { 2386 case 'g': 2387 gid = check_numeric(optarg, "gid"); 2388 break; 2389 case 'o': 2390 dupgid = 1; 2391 break; 2392 case 'n': 2393 memsave(&newname, optarg, strlen(optarg)); 2394 break; 2395 #ifdef EXTENSIONS 2396 case 'v': 2397 verbose = 1; 2398 break; 2399 #endif 2400 default: 2401 usermgmt_usage("groupmod"); 2402 /* NOTREACHED */ 2403 } 2404 } 2405 argc -= optind; 2406 argv += optind; 2407 if (argc != 1) { 2408 usermgmt_usage("groupmod"); 2409 } 2410 checkeuid(); 2411 if (gid < 0 && newname == NULL) { 2412 errx(EXIT_FAILURE, "Nothing to change"); 2413 } 2414 if (dupgid && gid < 0) { 2415 errx(EXIT_FAILURE, "Duplicate which gid?"); 2416 } 2417 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 2418 errx(EXIT_FAILURE, "Can't modify group: gid %d is a duplicate", 2419 gid); 2420 } 2421 if ((grp = find_group_info(*argv)) == NULL) { 2422 errx(EXIT_FAILURE, "Can't find group `%s' to modify", *argv); 2423 } 2424 if (!is_local(*argv, _PATH_GROUP)) { 2425 errx(EXIT_FAILURE, "Group `%s' must be a local group", *argv); 2426 } 2427 if (newname != NULL && !valid_group(newname)) { 2428 warnx("Invalid group name `%s'", newname); 2429 } 2430 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:", 2431 (newname) ? newname : grp->gr_name, 2432 grp->gr_passwd, 2433 (gid < 0) ? grp->gr_gid : gid); 2434 for (cpp = grp->gr_mem ; *cpp && cc < sizeof(buf) ; cpp++) { 2435 cc += snprintf(&buf[cc], sizeof(buf) - cc, "%s%s", *cpp, 2436 (cpp[1] == NULL) ? "" : ","); 2437 } 2438 cc += snprintf(&buf[cc], sizeof(buf) - cc, "\n"); 2439 if (newname != NULL) 2440 free(newname); 2441 openlog("groupmod", LOG_PID, LOG_USER); 2442 if (!modify_gid(*argv, buf)) 2443 exit(EXIT_FAILURE); 2444 2445 return EXIT_SUCCESS; 2446 } 2447 2448 #ifdef EXTENSIONS 2449 /* display user information */ 2450 int 2451 userinfo(int argc, char **argv) 2452 { 2453 struct passwd *pwp; 2454 struct group *grp; 2455 char buf[MaxEntryLen]; 2456 char **cpp; 2457 int exists; 2458 int cc; 2459 int i; 2460 2461 exists = 0; 2462 buf[0] = '\0'; 2463 while ((i = getopt(argc, argv, "e")) != -1) { 2464 switch(i) { 2465 case 'e': 2466 exists = 1; 2467 break; 2468 default: 2469 usermgmt_usage("userinfo"); 2470 /* NOTREACHED */ 2471 } 2472 } 2473 argc -= optind; 2474 argv += optind; 2475 if (argc != 1) { 2476 usermgmt_usage("userinfo"); 2477 } 2478 pwp = find_user_info(*argv); 2479 if (exists) { 2480 exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE); 2481 } 2482 if (pwp == NULL) { 2483 errx(EXIT_FAILURE, "Can't find user `%s'", *argv); 2484 } 2485 (void)printf("login\t%s\n", pwp->pw_name); 2486 (void)printf("passwd\t%s\n", pwp->pw_passwd); 2487 (void)printf("uid\t%d\n", pwp->pw_uid); 2488 for (cc = 0 ; (grp = getgrent()) != NULL ; ) { 2489 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2490 if (strcmp(*cpp, *argv) == 0 && 2491 grp->gr_gid != pwp->pw_gid) { 2492 cc += snprintf(&buf[cc], sizeof(buf) - cc, 2493 "%s ", grp->gr_name); 2494 } 2495 } 2496 } 2497 if ((grp = getgrgid(pwp->pw_gid)) == NULL) { 2498 (void)printf("groups\t%d %s\n", pwp->pw_gid, buf); 2499 } else { 2500 (void)printf("groups\t%s %s\n", grp->gr_name, buf); 2501 } 2502 (void)printf("change\t%s", pwp->pw_change > 0 ? 2503 ctime(&pwp->pw_change) : pwp->pw_change == -1 ? 2504 "NEXT LOGIN\n" : "NEVER\n"); 2505 (void)printf("class\t%s\n", pwp->pw_class); 2506 (void)printf("gecos\t%s\n", pwp->pw_gecos); 2507 (void)printf("dir\t%s\n", pwp->pw_dir); 2508 (void)printf("shell\t%s\n", pwp->pw_shell); 2509 (void)printf("expire\t%s", pwp->pw_expire ? 2510 ctime(&pwp->pw_expire) : "NEVER\n"); 2511 return EXIT_SUCCESS; 2512 } 2513 #endif 2514 2515 #ifdef EXTENSIONS 2516 /* display user information */ 2517 int 2518 groupinfo(int argc, char **argv) 2519 { 2520 struct group *grp; 2521 char **cpp; 2522 int exists; 2523 int i; 2524 2525 exists = 0; 2526 while ((i = getopt(argc, argv, "ev")) != -1) { 2527 switch(i) { 2528 case 'e': 2529 exists = 1; 2530 break; 2531 case 'v': 2532 verbose = 1; 2533 break; 2534 default: 2535 usermgmt_usage("groupinfo"); 2536 /* NOTREACHED */ 2537 } 2538 } 2539 argc -= optind; 2540 argv += optind; 2541 if (argc != 1) { 2542 usermgmt_usage("groupinfo"); 2543 } 2544 grp = find_group_info(*argv); 2545 if (exists) { 2546 exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE); 2547 } 2548 if (grp == NULL) { 2549 errx(EXIT_FAILURE, "Can't find group `%s'", *argv); 2550 } 2551 (void)printf("name\t%s\n", grp->gr_name); 2552 (void)printf("passwd\t%s\n", grp->gr_passwd); 2553 (void)printf("gid\t%d\n", grp->gr_gid); 2554 (void)printf("members\t"); 2555 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2556 (void)printf("%s", *cpp); 2557 if (*(cpp + 1)) { 2558 (void) printf(", "); 2559 } 2560 } 2561 (void)fputc('\n', stdout); 2562 return EXIT_SUCCESS; 2563 } 2564 #endif 2565
Indexes created Sat Sep 20 22:09:52 GMT 2025