1 /* $OpenBSD: user.c,v 1.55 2004/01/03 18:30:39 millert Exp $ */ 2 /* $NetBSD: user.c,v 1.69 2003/04/14 17:40:07 agc Exp $ */ 3 4 /* 5 * Copyright (c) 1999 Alistair G. Crooks. 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Alistair G. Crooks. 18 * 4. The name of the author may not be used to endorse or promote 19 * products derived from this software without specific prior written 20 * permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 23 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 26 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 28 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/param.h> 36 #include <sys/stat.h> 37 38 #include <ctype.h> 39 #include <dirent.h> 40 #include <err.h> 41 #include <fcntl.h> 42 #include <grp.h> 43 #ifdef EXTENSIONS 44 #include <login_cap.h> 45 #endif 46 #include <paths.h> 47 #include <pwd.h> 48 #include <regex.h> 49 #include <stdarg.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <syslog.h> 54 #include <time.h> 55 #include <unistd.h> 56 #include <util.h> 57 58 #include "defs.h" 59 #include "usermgmt.h" 60 61 62 /* this struct describes a uid range */ 63 typedef struct range_t { 64 uid_t r_from; /* low uid */ 65 uid_t r_to; /* high uid */ 66 } range_t; 67 68 /* this struct encapsulates the user information */ 69 typedef struct user_t { 70 int u_flags; /* see below */ 71 uid_t u_uid; /* uid of user */ 72 char *u_password; /* encrypted password */ 73 char *u_comment; /* comment field */ 74 char *u_home; /* home directory */ 75 char *u_primgrp; /* primary group */ 76 int u_groupc; /* # of secondary groups */ 77 const char *u_groupv[NGROUPS_MAX]; /* secondary groups */ 78 char *u_shell; /* user's shell */ 79 char *u_basedir; /* base directory for home */ 80 char *u_expire; /* when password will expire */ 81 char *u_inactive; /* when account will expire */ 82 char *u_skeldir; /* directory for startup files */ 83 char *u_class; /* login class */ 84 unsigned int u_rsize; /* size of range array */ 85 unsigned int u_rc; /* # of ranges */ 86 range_t *u_rv; /* the ranges */ 87 unsigned int u_defrc; /* # of ranges in defaults */ 88 int u_preserve; /* preserve uids on deletion */ 89 } user_t; 90 91 /* flags for which fields of the user_t replace the passwd entry */ 92 enum { 93 F_COMMENT = 0x0001, 94 F_DUPUID = 0x0002, 95 F_EXPIRE = 0x0004, 96 F_GROUP = 0x0008, 97 F_HOMEDIR = 0x0010, 98 F_MKDIR = 0x0020, 99 F_INACTIVE = 0x0040, 100 F_PASSWORD = 0x0080, 101 F_SECGROUP = 0x0100, 102 F_SHELL = 0x0200, 103 F_UID = 0x0400, 104 F_USERNAME = 0x0800, 105 F_CLASS = 0x1000 106 }; 107 108 #define CONFFILE "/etc/usermgmt.conf" 109 110 #ifndef DEF_GROUP 111 #define DEF_GROUP "users" 112 #endif 113 114 #ifndef DEF_BASEDIR 115 #define DEF_BASEDIR "/home" 116 #endif 117 118 #ifndef DEF_SKELDIR 119 #define DEF_SKELDIR "/etc/skel" 120 #endif 121 122 #ifndef DEF_SHELL 123 #define DEF_SHELL _PATH_CSHELL 124 #endif 125 126 #ifndef DEF_COMMENT 127 #define DEF_COMMENT "" 128 #endif 129 130 #ifndef DEF_LOWUID 131 #define DEF_LOWUID 1000 132 #endif 133 134 #ifndef DEF_HIGHUID 135 #define DEF_HIGHUID 60000 136 #endif 137 138 #ifndef DEF_INACTIVE 139 #define DEF_INACTIVE 0 140 #endif 141 142 #ifndef DEF_EXPIRE 143 #define DEF_EXPIRE NULL 144 #endif 145 146 #ifndef DEF_CLASS 147 #define DEF_CLASS "" 148 #endif 149 150 #ifndef WAITSECS 151 #define WAITSECS 10 152 #endif 153 154 #ifndef NOBODY_UID 155 #define NOBODY_UID 32767 156 #endif 157 158 /* some useful constants */ 159 enum { 160 MaxShellNameLen = 256, 161 MaxFileNameLen = MAXPATHLEN, 162 MaxUserNameLen = _PW_NAME_LEN, 163 MaxCommandLen = 2048, 164 PasswordLength = _PASSWORD_LEN, 165 166 DES_Len = 13, 167 168 LowGid = DEF_LOWUID, 169 HighGid = DEF_HIGHUID 170 }; 171 172 /* Full paths of programs used here */ 173 #define CHMOD "/bin/chmod" 174 #define CHOWN "/sbin/chown" 175 #define MKDIR "/bin/mkdir" 176 #define MV "/bin/mv" 177 #define NOLOGIN "/sbin/nologin" 178 #define PAX "/bin/pax" 179 #define RM "/bin/rm" 180 181 #define UNSET_INACTIVE "Null (unset)" 182 #define UNSET_EXPIRY "Null (unset)" 183 184 static int asystem(const char *fmt, ...) 185 __attribute__((__format__(__printf__, 1, 2))); 186 187 static int verbose; 188 189 /* if *cpp is non-null, free it, then assign `n' chars of `s' to it */ 190 static void 191 memsave(char **cpp, const char *s, size_t n) 192 { 193 if (*cpp != NULL) { 194 FREE(*cpp); 195 } 196 NEWARRAY(char, *cpp, n + 1, exit(1)); 197 (void) memcpy(*cpp, s, n); 198 (*cpp)[n] = '\0'; 199 } 200 201 /* a replacement for system(3) */ 202 static int 203 asystem(const char *fmt, ...) 204 { 205 va_list vp; 206 char buf[MaxCommandLen]; 207 int ret; 208 209 va_start(vp, fmt); 210 (void) vsnprintf(buf, sizeof(buf), fmt, vp); 211 va_end(vp); 212 if (verbose) { 213 (void) printf("Command: %s\n", buf); 214 } 215 if ((ret = system(buf)) != 0) { 216 warnx("[Warning] can't system `%s'", buf); 217 } 218 return ret; 219 } 220 221 /* remove a users home directory, returning 1 for success (ie, no problems encountered) */ 222 static int 223 removehomedir(const char *user, uid_t uid, const char *dir) 224 { 225 struct stat st; 226 227 /* userid not root? */ 228 if (uid == 0) { 229 warnx("Not deleting home directory `%s'; userid is 0", dir); 230 return 0; 231 } 232 233 /* directory exists (and is a directory!) */ 234 if (stat(dir, &st) < 0) { 235 warnx("Home directory `%s' doesn't exist", dir); 236 return 0; 237 } 238 if (!S_ISDIR(st.st_mode)) { 239 warnx("Home directory `%s' is not a directory", dir); 240 return 0; 241 } 242 243 /* userid matches directory owner? */ 244 if (st.st_uid != uid) { 245 warnx("User `%s' doesn't own directory `%s', not removed", 246 user, dir); 247 return 0; 248 } 249 250 (void) seteuid(uid); 251 /* we add the "|| true" to keep asystem() quiet if there is a non-zero exit status. */ 252 (void) asystem("%s -rf %s > /dev/null 2>&1 || true", RM, dir); 253 (void) seteuid(0); 254 if (rmdir(dir) < 0) { 255 warnx("Unable to remove all files in `%s'", dir); 256 return 0; 257 } 258 return 1; 259 } 260 261 /* return 1 if all of `s' is numeric */ 262 static int 263 is_number(char *s) 264 { 265 for ( ; *s ; s++) { 266 if (!isdigit((unsigned char) *s)) { 267 return 0; 268 } 269 } 270 return 1; 271 } 272 273 /* 274 * check that the effective uid is 0 - called from funcs which will 275 * modify data and config files. 276 */ 277 static void 278 checkeuid(void) 279 { 280 if (geteuid() != 0) { 281 errx(EXIT_FAILURE, "Program must be run as root"); 282 } 283 } 284 285 /* copy any dot files into the user's home directory */ 286 static int 287 copydotfiles(char *skeldir, uid_t uid, gid_t gid, char *dir) 288 { 289 struct dirent *dp; 290 DIR *dirp; 291 int n; 292 293 if ((dirp = opendir(skeldir)) == NULL) { 294 warn("can't open source . files dir `%s'", skeldir); 295 return 0; 296 } 297 for (n = 0; (dp = readdir(dirp)) != NULL && n == 0 ; ) { 298 if (strcmp(dp->d_name, ".") == 0 || 299 strcmp(dp->d_name, "..") == 0) { 300 continue; 301 } 302 n = 1; 303 } 304 (void) closedir(dirp); 305 if (n == 0) { 306 warnx("No \"dot\" initialisation files found"); 307 } else { 308 (void) asystem("cd %s && %s -rw -pe %s . %s", 309 skeldir, PAX, (verbose) ? "-v" : "", dir); 310 } 311 (void) asystem("%s -R -P %u:%u %s", CHOWN, uid, gid, dir); 312 (void) asystem("%s -R u+w %s", CHMOD, dir); 313 return n; 314 } 315 316 /* create a group entry with gid `gid' */ 317 static int 318 creategid(char *group, gid_t gid, const char *name) 319 { 320 struct stat st; 321 FILE *from; 322 FILE *to; 323 char buf[LINE_MAX]; 324 char f[MaxFileNameLen]; 325 int fd; 326 int cc; 327 328 if (getgrnam(group) != NULL) { 329 warnx("group `%s' already exists", group); 330 return 0; 331 } 332 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 333 warn("can't create gid for `%s': can't open `%s'", group, 334 _PATH_GROUP); 335 return 0; 336 } 337 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 338 warn("can't lock `%s'", _PATH_GROUP); 339 } 340 (void) fstat(fileno(from), &st); 341 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 342 if ((fd = mkstemp(f)) < 0) { 343 (void) fclose(from); 344 warn("can't create gid: mkstemp failed"); 345 return 0; 346 } 347 if ((to = fdopen(fd, "w")) == NULL) { 348 (void) fclose(from); 349 (void) close(fd); 350 (void) unlink(f); 351 warn("can't create gid: fdopen `%s' failed", f); 352 return 0; 353 } 354 while ((cc = fread(buf, sizeof(char), sizeof(buf), from)) > 0) { 355 if (fwrite(buf, cc, 1, to) != 1) { 356 (void) fclose(from); 357 (void) fclose(to); 358 (void) unlink(f); 359 warn("can't create gid: short write to `%s'", f); 360 return 0; 361 } 362 } 363 (void) fprintf(to, "%s:*:%u:%s\n", group, gid, name); 364 (void) fclose(from); 365 (void) fclose(to); 366 if (rename(f, _PATH_GROUP) < 0) { 367 (void) unlink(f); 368 warn("can't create gid: can't rename `%s' to `%s'", f, 369 _PATH_GROUP); 370 return 0; 371 } 372 (void) chmod(_PATH_GROUP, st.st_mode & 07777); 373 syslog(LOG_INFO, "new group added: name=%s, gid=%d", group, gid); 374 return 1; 375 } 376 377 /* modify the group entry with name `group' to be newent */ 378 static int 379 modify_gid(char *group, char *newent) 380 { 381 struct stat st; 382 FILE *from; 383 FILE *to; 384 char buf[LINE_MAX]; 385 char f[MaxFileNameLen]; 386 char *colon; 387 int groupc; 388 int entc; 389 int fd; 390 int cc; 391 392 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 393 warn("can't modify gid for `%s': can't open `%s'", group, 394 _PATH_GROUP); 395 return 0; 396 } 397 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 398 warn("can't lock `%s'", _PATH_GROUP); 399 } 400 (void) fstat(fileno(from), &st); 401 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 402 if ((fd = mkstemp(f)) < 0) { 403 (void) fclose(from); 404 warn("can't modify gid: mkstemp failed"); 405 return 0; 406 } 407 if ((to = fdopen(fd, "w")) == NULL) { 408 (void) fclose(from); 409 (void) close(fd); 410 (void) unlink(f); 411 warn("can't modify gid: fdopen `%s' failed", f); 412 return 0; 413 } 414 groupc = strlen(group); 415 while (fgets(buf, sizeof(buf), from) != NULL) { 416 cc = strlen(buf); 417 if (buf[cc - 1] != '\n' && !feof(from)) { 418 while (fgetc(from) != '\n' && !feof(from)) 419 cc++; 420 warn("%s: line `%s' too long (%d bytes), skipping", 421 _PATH_GROUP, buf, cc); 422 continue; 423 } 424 if ((colon = strchr(buf, ':')) == NULL) { 425 warn("badly formed entry `%s'", buf); 426 continue; 427 } 428 entc = (int)(colon - buf); 429 if (entc == groupc && strncmp(group, buf, entc) == 0) { 430 if (newent == NULL) { 431 continue; 432 } else { 433 cc = strlen(newent); 434 (void) strlcpy(buf, newent, sizeof(buf)); 435 } 436 } 437 if (fwrite(buf, cc, 1, to) != 1) { 438 (void) fclose(from); 439 (void) fclose(to); 440 (void) unlink(f); 441 warn("can't modify gid: short write to `%s'", f); 442 return 0; 443 } 444 } 445 (void) fclose(from); 446 (void) fclose(to); 447 if (rename(f, _PATH_GROUP) < 0) { 448 (void) unlink(f); 449 warn("can't modify gid: can't rename `%s' to `%s'", f, _PATH_GROUP); 450 return 0; 451 } 452 (void) chmod(_PATH_GROUP, st.st_mode & 07777); 453 if (newent == NULL) { 454 syslog(LOG_INFO, "group deleted: name=%s", group); 455 } else { 456 syslog(LOG_INFO, "group information modified: name=%s", group); 457 } 458 return 1; 459 } 460 461 /* modify the group entries for all `groups', by adding `user' */ 462 static int 463 append_group(char *user, int ngroups, const char **groups) 464 { 465 struct group *grp; 466 struct stat st; 467 FILE *from; 468 FILE *to; 469 char buf[LINE_MAX]; 470 char f[MaxFileNameLen]; 471 char *colon; 472 int fd; 473 int cc; 474 int i; 475 int j; 476 477 for (i = 0 ; i < ngroups ; i++) { 478 if ((grp = getgrnam(groups[i])) == NULL) { 479 warnx("can't append group `%s' for user `%s'", 480 groups[i], user); 481 } else { 482 for (j = 0 ; grp->gr_mem[j] ; j++) { 483 if (strcmp(user, grp->gr_mem[j]) == 0) { 484 /* already in it */ 485 groups[i] = ""; 486 } 487 } 488 } 489 } 490 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 491 warn("can't append group for `%s': can't open `%s'", user, 492 _PATH_GROUP); 493 return 0; 494 } 495 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 496 warn("can't lock `%s'", _PATH_GROUP); 497 } 498 (void) fstat(fileno(from), &st); 499 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 500 if ((fd = mkstemp(f)) < 0) { 501 (void) fclose(from); 502 warn("can't append group: mkstemp failed"); 503 return 0; 504 } 505 if ((to = fdopen(fd, "w")) == NULL) { 506 (void) fclose(from); 507 (void) close(fd); 508 (void) unlink(f); 509 warn("can't append group: fdopen `%s' failed", f); 510 return 0; 511 } 512 while (fgets(buf, sizeof(buf), from) != NULL) { 513 cc = strlen(buf); 514 if (buf[cc - 1] != '\n' && !feof(from)) { 515 while (fgetc(from) != '\n' && !feof(from)) 516 cc++; 517 warn("%s: line `%s' too long (%d bytes), skipping", 518 _PATH_GROUP, buf, cc); 519 continue; 520 } 521 if ((colon = strchr(buf, ':')) == NULL) { 522 warnx("badly formed entry `%s'", buf); 523 continue; 524 } 525 for (i = 0 ; i < ngroups ; i++) { 526 if (strncmp(groups[i], buf, colon - buf) == 0) { 527 while (isspace(buf[cc - 1])) 528 cc--; 529 buf[(j = cc)] = '\0'; 530 if (buf[strlen(buf) - 1] != ':') 531 strlcat(buf, ",", sizeof(buf)); 532 cc = strlcat(buf, user, sizeof(buf)) + 1; 533 if (cc >= sizeof(buf)) { 534 warnx("Warning: group `%s' would " 535 "become too long, not modifying", 536 groups[i]); 537 cc = j + 1; 538 } 539 buf[cc - 1] = '\n'; 540 buf[cc] = '\0'; 541 } 542 } 543 if (fwrite(buf, cc, 1, to) != 1) { 544 (void) fclose(from); 545 (void) fclose(to); 546 (void) unlink(f); 547 warn("can't append group: short write to `%s'", f); 548 return 0; 549 } 550 } 551 (void) fclose(from); 552 (void) fclose(to); 553 if (rename(f, _PATH_GROUP) < 0) { 554 (void) unlink(f); 555 warn("can't append group: can't rename `%s' to `%s'", f, _PATH_GROUP); 556 return 0; 557 } 558 (void) chmod(_PATH_GROUP, st.st_mode & 07777); 559 return 1; 560 } 561 562 /* return 1 if `login' is a valid login name */ 563 static int 564 valid_login(char *login_name) 565 { 566 unsigned char *cp; 567 568 /* The first character cannot be a hyphen */ 569 if (*login_name == '-') 570 return 0; 571 572 for (cp = login_name ; *cp ; cp++) { 573 /* We allow '$' as the last character for samba */ 574 if (!isalnum(*cp) && *cp != '.' && *cp != '_' && *cp != '-' && 575 !(*cp == '$' && *(cp + 1) == '\0')) { 576 return 0; 577 } 578 } 579 if ((char *)cp - login_name > MaxUserNameLen) 580 return 0; 581 return 1; 582 } 583 584 /* return 1 if `group' is a valid group name */ 585 static int 586 valid_group(char *group) 587 { 588 unsigned char *cp; 589 590 for (cp = group ; *cp ; cp++) { 591 if (!isalnum(*cp) && *cp != '.' && *cp != '_' && *cp != '-') { 592 return 0; 593 } 594 } 595 if ((char *)cp - group > MaxUserNameLen) 596 return 0; 597 return 1; 598 } 599 600 #ifdef EXTENSIONS 601 /* return 1 if `class' exists */ 602 static int 603 valid_class(char *class) 604 { 605 login_cap_t *lc; 606 607 if ((lc = login_getclass(class)) != NULL) 608 login_close(lc); 609 return lc != NULL; 610 } 611 #endif 612 613 /* find the next gid in the range lo .. hi */ 614 static int 615 getnextgid(uid_t *gidp, uid_t lo, uid_t hi) 616 { 617 for (*gidp = lo ; *gidp < hi ; *gidp += 1) { 618 if (getgrgid((gid_t)*gidp) == NULL) { 619 return 1; 620 } 621 } 622 return 0; 623 } 624 625 #ifdef EXTENSIONS 626 /* save a range of uids */ 627 static int 628 save_range(user_t *up, char *cp) 629 { 630 int from; 631 int to; 632 int i; 633 634 if (up->u_rsize == 0) { 635 up->u_rsize = 32; 636 NEWARRAY(range_t, up->u_rv, up->u_rsize, return(0)); 637 } else if (up->u_rc == up->u_rsize) { 638 up->u_rsize *= 2; 639 RENEW(range_t, up->u_rv, up->u_rsize, return(0)); 640 } 641 if (up->u_rv && sscanf(cp, "%d..%d", &from, &to) == 2) { 642 for (i = up->u_defrc ; i < up->u_rc ; i++) { 643 if (up->u_rv[i].r_from == from && up->u_rv[i].r_to == to) { 644 break; 645 } 646 } 647 if (i == up->u_rc) { 648 up->u_rv[up->u_rc].r_from = from; 649 up->u_rv[up->u_rc].r_to = to; 650 up->u_rc += 1; 651 } 652 } else { 653 warnx("Bad range `%s'", cp); 654 return 0; 655 } 656 return 1; 657 } 658 #endif 659 660 /* set the defaults in the defaults file */ 661 static int 662 setdefaults(user_t *up) 663 { 664 char template[MaxFileNameLen]; 665 FILE *fp; 666 int ret; 667 int fd; 668 #ifdef EXTENSIONS 669 int i; 670 #endif 671 672 (void) snprintf(template, sizeof(template), "%s.XXXXXXXX", CONFFILE); 673 if ((fd = mkstemp(template)) < 0) { 674 warnx("can't mkstemp `%s' for writing", CONFFILE); 675 return 0; 676 } 677 if ((fp = fdopen(fd, "w")) == NULL) { 678 warn("can't fdopen `%s' for writing", CONFFILE); 679 return 0; 680 } 681 ret = 1; 682 if (fprintf(fp, "group\t\t%s\n", up->u_primgrp) <= 0 || 683 fprintf(fp, "base_dir\t%s\n", up->u_basedir) <= 0 || 684 fprintf(fp, "skel_dir\t%s\n", up->u_skeldir) <= 0 || 685 fprintf(fp, "shell\t\t%s\n", up->u_shell) <= 0 || 686 #ifdef EXTENSIONS 687 fprintf(fp, "class\t\t%s\n", up->u_class) <= 0 || 688 #endif 689 fprintf(fp, "inactive\t%s\n", (up->u_inactive == NULL) ? UNSET_INACTIVE : up->u_inactive) <= 0 || 690 fprintf(fp, "expire\t\t%s\n", (up->u_expire == NULL) ? UNSET_EXPIRY : up->u_expire) <= 0 || 691 fprintf(fp, "preserve\t%s\n", (up->u_preserve == 0) ? "false" : "true") <= 0) { 692 warn("can't write to `%s'", CONFFILE); 693 ret = 0; 694 } 695 #ifdef EXTENSIONS 696 for (i = (up->u_defrc != up->u_rc) ? up->u_defrc : 0 ; i < up->u_rc ; i++) { 697 if (fprintf(fp, "range\t\t%d..%d\n", up->u_rv[i].r_from, up->u_rv[i].r_to) <= 0) { 698 warn("can't write to `%s'", CONFFILE); 699 ret = 0; 700 } 701 } 702 #endif 703 (void) fclose(fp); 704 if (ret) { 705 ret = ((rename(template, CONFFILE) == 0) && (chmod(CONFFILE, 0644) == 0)); 706 } 707 return ret; 708 } 709 710 /* read the defaults file */ 711 static void 712 read_defaults(user_t *up) 713 { 714 struct stat st; 715 size_t lineno; 716 size_t len; 717 FILE *fp; 718 unsigned char *cp; 719 unsigned char *s; 720 721 memsave(&up->u_primgrp, DEF_GROUP, strlen(DEF_GROUP)); 722 memsave(&up->u_basedir, DEF_BASEDIR, strlen(DEF_BASEDIR)); 723 memsave(&up->u_skeldir, DEF_SKELDIR, strlen(DEF_SKELDIR)); 724 memsave(&up->u_shell, DEF_SHELL, strlen(DEF_SHELL)); 725 memsave(&up->u_comment, DEF_COMMENT, strlen(DEF_COMMENT)); 726 #ifdef EXTENSIONS 727 memsave(&up->u_class, DEF_CLASS, strlen(DEF_CLASS)); 728 #endif 729 up->u_rsize = 16; 730 up->u_defrc = 0; 731 NEWARRAY(range_t, up->u_rv, up->u_rsize, exit(1)); 732 up->u_inactive = DEF_INACTIVE; 733 up->u_expire = DEF_EXPIRE; 734 if ((fp = fopen(CONFFILE, "r")) == NULL) { 735 if (stat(CONFFILE, &st) < 0 && !setdefaults(up)) { 736 warn("can't create `%s' defaults file", CONFFILE); 737 } 738 fp = fopen(CONFFILE, "r"); 739 } 740 if (fp != NULL) { 741 while ((s = fparseln(fp, &len, &lineno, NULL, 0)) != NULL) { 742 if (strncmp(s, "group", 5) == 0) { 743 for (cp = s + 5 ; *cp && isspace(*cp) ; cp++) { 744 } 745 memsave(&up->u_primgrp, cp, strlen(cp)); 746 } else if (strncmp(s, "base_dir", 8) == 0) { 747 for (cp = s + 8 ; *cp && isspace(*cp) ; cp++) { 748 } 749 memsave(&up->u_basedir, cp, strlen(cp)); 750 } else if (strncmp(s, "skel_dir", 8) == 0) { 751 for (cp = s + 8 ; *cp && isspace(*cp) ; cp++) { 752 } 753 memsave(&up->u_skeldir, cp, strlen(cp)); 754 } else if (strncmp(s, "shell", 5) == 0) { 755 for (cp = s + 5 ; *cp && isspace(*cp) ; cp++) { 756 } 757 memsave(&up->u_shell, cp, strlen(cp)); 758 } else if (strncmp(s, "password", 8) == 0) { 759 for (cp = s + 8 ; *cp && isspace(*cp) ; cp++) { 760 } 761 memsave(&up->u_password, cp, strlen(cp)); 762 #ifdef EXTENSIONS 763 } else if (strncmp(s, "class", 5) == 0) { 764 for (cp = s + 5 ; *cp && isspace(*cp) ; cp++) { 765 } 766 memsave(&up->u_class, cp, strlen(cp)); 767 #endif 768 } else if (strncmp(s, "inactive", 8) == 0) { 769 for (cp = s + 8 ; *cp && isspace(*cp) ; cp++) { 770 } 771 if (strcmp(cp, UNSET_INACTIVE) == 0) { 772 if (up->u_inactive) { 773 FREE(up->u_inactive); 774 } 775 up->u_inactive = NULL; 776 } else { 777 memsave(&up->u_inactive, cp, strlen(cp)); 778 } 779 #ifdef EXTENSIONS 780 } else if (strncmp(s, "range", 5) == 0) { 781 for (cp = s + 5 ; *cp && isspace(*cp) ; cp++) { 782 } 783 (void) save_range(up, cp); 784 #endif 785 #ifdef EXTENSIONS 786 } else if (strncmp(s, "preserve", 8) == 0) { 787 for (cp = s + 8 ; *cp && isspace(*cp) ; cp++) { 788 } 789 up->u_preserve = (strncmp(cp, "true", 4) == 0) ? 1 : 790 (strncmp(cp, "yes", 3) == 0) ? 1 : 791 atoi(cp); 792 #endif 793 } else if (strncmp(s, "expire", 6) == 0) { 794 for (cp = s + 6 ; *cp && isspace(*cp) ; cp++) { 795 } 796 if (strcmp(cp, UNSET_EXPIRY) == 0) { 797 if (up->u_expire) { 798 FREE(up->u_expire); 799 } 800 up->u_expire = NULL; 801 } else { 802 memsave(&up->u_expire, cp, strlen(cp)); 803 } 804 } 805 (void) free(s); 806 } 807 (void) fclose(fp); 808 } 809 if (up->u_rc == 0) { 810 up->u_rv[up->u_rc].r_from = DEF_LOWUID; 811 up->u_rv[up->u_rc].r_to = DEF_HIGHUID; 812 up->u_rc += 1; 813 } 814 up->u_defrc = up->u_rc; 815 } 816 817 /* return the next valid unused uid */ 818 static int 819 getnextuid(int sync_uid_gid, uid_t *uid, uid_t low_uid, uid_t high_uid) 820 { 821 for (*uid = low_uid ; *uid <= high_uid ; (*uid)++) { 822 if (getpwuid((uid_t)(*uid)) == NULL && *uid != NOBODY_UID) { 823 if (sync_uid_gid) { 824 if (getgrgid((gid_t)(*uid)) == NULL) { 825 return 1; 826 } 827 } else { 828 return 1; 829 } 830 } 831 } 832 return 0; 833 } 834 835 /* structure which defines a password type */ 836 typedef struct passwd_type_t { 837 const char *type; /* optional type descriptor */ 838 int desc_length; /* length of type descriptor */ 839 int length; /* length of password */ 840 const char *regex; /* regexp to output the password */ 841 int re_sub; /* subscript of regexp to use */ 842 } passwd_type_t; 843 844 static passwd_type_t passwd_types[] = { 845 { "$2a", 3, 54, "\\$[^$]+\\$[^$]+\\$(.*)", 1 }, /* Blowfish */ 846 { "$1", 2, 34, NULL, 0 }, /* MD5 */ 847 { "", 0, DES_Len,NULL, 0 }, /* standard DES */ 848 { NULL, -1, -1, NULL, 0 } /* none - terminate search */ 849 }; 850 851 /* return non-zero if it's a valid password - check length for cipher type */ 852 static int 853 valid_password_length(char *newpasswd) 854 { 855 passwd_type_t *pwtp; 856 regmatch_t matchv[10]; 857 regex_t r; 858 859 for (pwtp = passwd_types ; pwtp->desc_length >= 0 ; pwtp++) { 860 if (strncmp(newpasswd, pwtp->type, pwtp->desc_length) == 0) { 861 if (pwtp->regex == NULL) { 862 return strlen(newpasswd) == pwtp->length; 863 } 864 (void) regcomp(&r, pwtp->regex, REG_EXTENDED); 865 if (regexec(&r, newpasswd, 10, matchv, 0) == 0) { 866 regfree(&r); 867 return (int)(matchv[pwtp->re_sub].rm_eo - matchv[pwtp->re_sub].rm_so + 1) == pwtp->length; 868 } 869 regfree(&r); 870 } 871 } 872 return 0; 873 } 874 875 /* look for a valid time, return 0 if it was specified but bad */ 876 static int 877 scantime(time_t *tp, char *s) 878 { 879 struct tm tm; 880 881 *tp = 0; 882 if (s != NULL) { 883 (void) memset(&tm, 0, sizeof(tm)); 884 if (strptime(s, "%c", &tm) != NULL) { 885 *tp = mktime(&tm); 886 } else if (strptime(s, "%B %d %Y", &tm) != NULL) { 887 *tp = mktime(&tm); 888 } else if (isdigit((unsigned char) s[0]) != NULL) { 889 *tp = atoi(s); 890 } else { 891 return 0; 892 } 893 } 894 return 1; 895 } 896 897 /* compute the extra length '&' expansion consumes */ 898 static size_t 899 expand_len(const char *p, const char *username) 900 { 901 size_t alen; 902 size_t ulen; 903 904 ulen = strlen(username); 905 for (alen = 0; *p != '\0'; p++) 906 if (*p == '&') 907 alen += ulen - 1; 908 return alen; 909 } 910 911 /* add a user */ 912 static int 913 adduser(char *login_name, user_t *up) 914 { 915 struct group *grp; 916 struct stat st; 917 time_t expire; 918 time_t inactive; 919 char password[PasswordLength + 1]; 920 char home[MaxFileNameLen]; 921 char buf[LINE_MAX]; 922 int sync_uid_gid; 923 int masterfd; 924 int ptmpfd; 925 gid_t gid; 926 int cc; 927 int i; 928 929 if (!valid_login(login_name)) { 930 errx(EXIT_FAILURE, "`%s' is not a valid login name", login_name); 931 } 932 #ifdef EXTENSIONS 933 if (!valid_class(up->u_class)) { 934 errx(EXIT_FAILURE, "No such login class `%s'", up->u_class); 935 } 936 #endif 937 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 938 err(EXIT_FAILURE, "can't open `%s'", _PATH_MASTERPASSWD); 939 } 940 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 941 err(EXIT_FAILURE, "can't lock `%s'", _PATH_MASTERPASSWD); 942 } 943 pw_init(); 944 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 945 (void) close(masterfd); 946 err(EXIT_FAILURE, "can't obtain pw_lock"); 947 } 948 while ((cc = read(masterfd, buf, sizeof(buf))) > 0) { 949 if (write(ptmpfd, buf, (size_t)(cc)) != cc) { 950 (void) close(masterfd); 951 (void) close(ptmpfd); 952 pw_abort(); 953 err(EXIT_FAILURE, "short write to /etc/ptmp (not %d chars)", cc); 954 } 955 } 956 /* if no uid was specified, get next one in [low_uid..high_uid] range */ 957 sync_uid_gid = (strcmp(up->u_primgrp, "=uid") == 0); 958 if (up->u_uid == UID_MAX) { 959 int got_id = 0; 960 961 /* 962 * Look for a free UID in the command line ranges (if any). 963 * These start after the ranges specified in the config file. 964 */ 965 for (i = up->u_defrc; got_id == 0 && i < up->u_rc ; i++) { 966 got_id = getnextuid(sync_uid_gid, &up->u_uid, 967 up->u_rv[i].r_from, up->u_rv[i].r_to); 968 } 969 /* 970 * If there were no free UIDs in the command line ranges, 971 * try the ranges from the config file (there will always 972 * be at least one default). 973 */ 974 if (got_id == 0) { 975 for (i = 0; got_id == 0 && i < up->u_defrc; i++) { 976 got_id = getnextuid(sync_uid_gid, &up->u_uid, 977 up->u_rv[i].r_from, up->u_rv[i].r_to); 978 } 979 } 980 if (got_id == 0) { 981 (void) close(ptmpfd); 982 pw_abort(); 983 errx(EXIT_FAILURE, "can't get next uid for %u", up->u_uid); 984 } 985 } 986 /* check uid isn't already allocated */ 987 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 988 (void) close(ptmpfd); 989 pw_abort(); 990 errx(EXIT_FAILURE, "uid %u is already in use", up->u_uid); 991 } 992 /* if -g=uid was specified, check gid is unused */ 993 if (sync_uid_gid) { 994 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 995 (void) close(ptmpfd); 996 pw_abort(); 997 errx(EXIT_FAILURE, "gid %u is already in use", up->u_uid); 998 } 999 gid = up->u_uid; 1000 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1001 gid = grp->gr_gid; 1002 } else if (is_number(up->u_primgrp) && 1003 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1004 gid = grp->gr_gid; 1005 } else { 1006 (void) close(ptmpfd); 1007 pw_abort(); 1008 errx(EXIT_FAILURE, "group %s not found", up->u_primgrp); 1009 } 1010 /* check name isn't already in use */ 1011 if (!(up->u_flags & F_DUPUID) && getpwnam(login_name) != NULL) { 1012 (void) close(ptmpfd); 1013 pw_abort(); 1014 errx(EXIT_FAILURE, "already a `%s' user", login_name); 1015 } 1016 if (up->u_flags & F_HOMEDIR) { 1017 (void) strlcpy(home, up->u_home, sizeof(home)); 1018 } else { 1019 /* if home directory hasn't been given, make it up */ 1020 (void) snprintf(home, sizeof(home), "%s/%s", up->u_basedir, 1021 login_name); 1022 } 1023 if (!scantime(&inactive, up->u_inactive)) { 1024 warnx("Warning: inactive time `%s' invalid, account expiry off", 1025 up->u_inactive); 1026 } 1027 if (!scantime(&expire, up->u_expire)) { 1028 warnx("Warning: expire time `%s' invalid, password expiry off", 1029 up->u_expire); 1030 } 1031 if (lstat(home, &st) < 0 && !(up->u_flags & F_MKDIR)) { 1032 warnx("Warning: home directory `%s' doesn't exist, and -m was" 1033 " not specified", home); 1034 } 1035 if (up->u_password != NULL && valid_password_length(up->u_password)) { 1036 (void) strlcpy(password, up->u_password, sizeof(password)); 1037 } else { 1038 (void) memset(password, '*', DES_Len); 1039 password[DES_Len] = 0; 1040 if (up->u_password != NULL) { 1041 warnx("Password `%s' is invalid: setting it to `%s'", 1042 up->u_password, password); 1043 } 1044 } 1045 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1046 login_name, 1047 password, 1048 up->u_uid, 1049 gid, 1050 #ifdef EXTENSIONS 1051 up->u_class, 1052 #else 1053 "", 1054 #endif 1055 (long) inactive, 1056 (long) expire, 1057 up->u_comment, 1058 home, 1059 up->u_shell); 1060 if (cc >= sizeof(buf) || cc < 0 || 1061 cc + expand_len(up->u_comment, login_name) >= 1023) { 1062 (void) close(ptmpfd); 1063 pw_abort(); 1064 errx(EXIT_FAILURE, "can't add `%s', line too long", buf); 1065 } 1066 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1067 (void) close(ptmpfd); 1068 pw_abort(); 1069 err(EXIT_FAILURE, "can't add `%s'", buf); 1070 } 1071 if (up->u_flags & F_MKDIR) { 1072 if (lstat(home, &st) == 0) { 1073 (void) close(ptmpfd); 1074 pw_abort(); 1075 errx(EXIT_FAILURE, "home directory `%s' already exists", 1076 home); 1077 } else { 1078 if (asystem("%s -p %s", MKDIR, home) != 0) { 1079 (void) close(ptmpfd); 1080 pw_abort(); 1081 err(EXIT_FAILURE, "can't mkdir `%s'", home); 1082 } 1083 (void) copydotfiles(up->u_skeldir, up->u_uid, gid, home); 1084 } 1085 } 1086 if (strcmp(up->u_primgrp, "=uid") == 0 && 1087 getgrnam(login_name) == NULL && 1088 !creategid(login_name, gid, login_name)) { 1089 (void) close(ptmpfd); 1090 pw_abort(); 1091 errx(EXIT_FAILURE, "can't create gid %d for login name %s", 1092 gid, login_name); 1093 } 1094 if (up->u_groupc > 0 && !append_group(login_name, up->u_groupc, up->u_groupv)) { 1095 (void) close(ptmpfd); 1096 pw_abort(); 1097 errx(EXIT_FAILURE, "can't append `%s' to new groups", login_name); 1098 } 1099 (void) close(ptmpfd); 1100 if (pw_mkdb(login_name, 0) < 0) { 1101 pw_abort(); 1102 err(EXIT_FAILURE, "pw_mkdb failed"); 1103 } 1104 syslog(LOG_INFO, "new user added: name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1105 login_name, up->u_uid, gid, home, up->u_shell); 1106 return 1; 1107 } 1108 1109 /* remove a user from the groups file */ 1110 static int 1111 rm_user_from_groups(char *login_name) 1112 { 1113 struct stat st; 1114 regmatch_t matchv[10]; 1115 regex_t r; 1116 FILE *from; 1117 FILE *to; 1118 char line[LINE_MAX]; 1119 char buf[LINE_MAX]; 1120 char f[MaxFileNameLen]; 1121 int fd; 1122 int cc; 1123 int sc; 1124 1125 (void) snprintf(line, sizeof(line), "(:|,)(%s)(,|$)", login_name); 1126 if (regcomp(&r, line, REG_EXTENDED|REG_NEWLINE) != 0) { 1127 warn("can't compile regular expression `%s'", line); 1128 return 0; 1129 } 1130 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 1131 warn("can't remove gid for `%s': can't open `%s'", login_name, _PATH_GROUP); 1132 return 0; 1133 } 1134 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 1135 warn("can't lock `%s'", _PATH_GROUP); 1136 } 1137 (void) fstat(fileno(from), &st); 1138 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 1139 if ((fd = mkstemp(f)) < 0) { 1140 (void) fclose(from); 1141 warn("can't create gid: mkstemp failed"); 1142 return 0; 1143 } 1144 if ((to = fdopen(fd, "w")) == NULL) { 1145 (void) fclose(from); 1146 (void) close(fd); 1147 (void) unlink(f); 1148 warn("can't create gid: fdopen `%s' failed", f); 1149 return 0; 1150 } 1151 while (fgets(buf, sizeof(buf), from) > 0) { 1152 cc = strlen(buf); 1153 if (buf[cc - 1] != '\n' && !feof(from)) { 1154 while (fgetc(from) != '\n' && !feof(from)) 1155 cc++; 1156 warn("%s: line `%s' too long (%d bytes), skipping", 1157 _PATH_GROUP, buf, cc); 1158 continue; 1159 } 1160 if (regexec(&r, buf, 10, matchv, 0) == 0) { 1161 if (buf[(int)matchv[1].rm_so] == ',') 1162 matchv[2].rm_so = matchv[1].rm_so; 1163 else if (matchv[2].rm_eo != matchv[3].rm_eo) 1164 matchv[2].rm_eo = matchv[3].rm_eo; 1165 cc -= (int) matchv[2].rm_eo; 1166 sc = (int) matchv[2].rm_so; 1167 if (fwrite(buf, sc, 1, to) != 1 || 1168 fwrite(&buf[(int)matchv[2].rm_eo], cc, 1, to) != 1) { 1169 (void) fclose(from); 1170 (void) close(fd); 1171 (void) unlink(f); 1172 warn("can't create gid: short write to `%s'", f); 1173 return 0; 1174 } 1175 } else if (fwrite(buf, cc, 1, to) != 1) { 1176 (void) fclose(from); 1177 (void) close(fd); 1178 (void) unlink(f); 1179 warn("can't create gid: short write to `%s'", f); 1180 return 0; 1181 } 1182 } 1183 (void) fclose(from); 1184 (void) fclose(to); 1185 if (rename(f, _PATH_GROUP) < 0) { 1186 (void) unlink(f); 1187 warn("can't create gid: can't rename `%s' to `%s'", f, _PATH_GROUP); 1188 return 0; 1189 } 1190 (void) chmod(_PATH_GROUP, st.st_mode & 07777); 1191 return 1; 1192 } 1193 1194 /* check that the user or group is local, not from YP/NIS */ 1195 static int 1196 is_local(char *name, const char *file) 1197 { 1198 regmatch_t matchv[10]; 1199 regex_t r; 1200 FILE *fp; 1201 char buf[LINE_MAX]; 1202 char re[LINE_MAX]; 1203 int ret; 1204 int cc; 1205 1206 (void) snprintf(re, sizeof(re), "^%s:", name); 1207 if (regcomp(&r, re, REG_EXTENDED) != 0) { 1208 errx(EXIT_FAILURE, "can't compile regular expression `%s'", re); 1209 } 1210 if ((fp = fopen(file, "r")) == NULL) { 1211 err(EXIT_FAILURE, "can't open `%s'", file); 1212 } 1213 for (ret = 0 ; fgets(buf, sizeof(buf), fp) != NULL ; ) { 1214 cc = strlen(buf); 1215 if (buf[cc - 1] != '\n' && !feof(fp)) { 1216 while (fgetc(fp) != '\n' && !feof(fp)) 1217 cc++; 1218 warn("%s: line `%s' too long (%d bytes), skipping", 1219 file, buf, cc); 1220 continue; 1221 } 1222 if (regexec(&r, buf, 10, matchv, 0) == 0) { 1223 ret = 1; 1224 break; 1225 } 1226 } 1227 (void) fclose(fp); 1228 return ret; 1229 } 1230 1231 /* modify a user */ 1232 static int 1233 moduser(char *login_name, char *newlogin, user_t *up) 1234 { 1235 struct passwd *pwp; 1236 struct group *grp; 1237 const char *homedir; 1238 char buf[LINE_MAX]; 1239 size_t colonc, loginc; 1240 size_t cc; 1241 FILE *master; 1242 char newdir[MaxFileNameLen]; 1243 char *colon; 1244 int len; 1245 int masterfd; 1246 int ptmpfd; 1247 int rval; 1248 1249 if (!valid_login(newlogin)) { 1250 errx(EXIT_FAILURE, "`%s' is not a valid login name", login_name); 1251 } 1252 if ((pwp = getpwnam(login_name)) == NULL) { 1253 errx(EXIT_FAILURE, "No such user `%s'", login_name); 1254 } 1255 if (!is_local(login_name, _PATH_MASTERPASSWD)) { 1256 errx(EXIT_FAILURE, "User `%s' must be a local user", login_name); 1257 } 1258 /* keep dir name in case we need it for '-m' */ 1259 homedir = pwp->pw_dir; 1260 1261 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1262 err(EXIT_FAILURE, "can't open `%s'", _PATH_MASTERPASSWD); 1263 } 1264 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1265 err(EXIT_FAILURE, "can't lock `%s'", _PATH_MASTERPASSWD); 1266 } 1267 pw_init(); 1268 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1269 (void) close(masterfd); 1270 err(EXIT_FAILURE, "can't obtain pw_lock"); 1271 } 1272 if ((master = fdopen(masterfd, "r")) == NULL) { 1273 (void) close(masterfd); 1274 (void) close(ptmpfd); 1275 pw_abort(); 1276 err(EXIT_FAILURE, "can't fdopen fd for %s", _PATH_MASTERPASSWD); 1277 } 1278 if (up != NULL) { 1279 if (up->u_flags & F_USERNAME) { 1280 /* if changing name, check new name isn't already in use */ 1281 if (strcmp(login_name, newlogin) != 0 && getpwnam(newlogin) != NULL) { 1282 (void) close(ptmpfd); 1283 pw_abort(); 1284 errx(EXIT_FAILURE, "already a `%s' user", newlogin); 1285 } 1286 pwp->pw_name = newlogin; 1287 1288 /* 1289 * Provide a new directory name in case the 1290 * home directory is to be moved. 1291 */ 1292 if (up->u_flags & F_MKDIR) { 1293 (void) snprintf(newdir, sizeof(newdir), 1294 "%s/%s", up->u_basedir, newlogin); 1295 pwp->pw_dir = newdir; 1296 } 1297 } 1298 if (up->u_flags & F_PASSWORD) { 1299 if (up->u_password != NULL) { 1300 if (!valid_password_length(up->u_password)) { 1301 (void) close(ptmpfd); 1302 pw_abort(); 1303 errx(EXIT_FAILURE, "Invalid password: `%s'", 1304 up->u_password); 1305 } 1306 pwp->pw_passwd = up->u_password; 1307 } 1308 } 1309 if (up->u_flags & F_UID) { 1310 /* check uid isn't already allocated */ 1311 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1312 (void) close(ptmpfd); 1313 pw_abort(); 1314 errx(EXIT_FAILURE, "uid %u is already in use", up->u_uid); 1315 } 1316 pwp->pw_uid = up->u_uid; 1317 } 1318 if (up->u_flags & F_GROUP) { 1319 /* if -g=uid was specified, check gid is unused */ 1320 if (strcmp(up->u_primgrp, "=uid") == 0) { 1321 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1322 (void) close(ptmpfd); 1323 pw_abort(); 1324 errx(EXIT_FAILURE, "gid %u is already in use", up->u_uid); 1325 } 1326 pwp->pw_gid = up->u_uid; 1327 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1328 pwp->pw_gid = grp->gr_gid; 1329 } else if (is_number(up->u_primgrp) && 1330 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1331 pwp->pw_gid = grp->gr_gid; 1332 } else { 1333 (void) close(ptmpfd); 1334 pw_abort(); 1335 errx(EXIT_FAILURE, "group %s not found", up->u_primgrp); 1336 } 1337 } 1338 if (up->u_flags & F_INACTIVE) { 1339 if (!scantime(&pwp->pw_change, up->u_inactive)) { 1340 warnx("Warning: inactive time `%s' invalid, password expiry off", 1341 up->u_inactive); 1342 } 1343 } 1344 if (up->u_flags & F_EXPIRE) { 1345 if (!scantime(&pwp->pw_expire, up->u_expire)) { 1346 warnx("Warning: expire time `%s' invalid, password expiry off", 1347 up->u_expire); 1348 } 1349 } 1350 if (up->u_flags & F_COMMENT) 1351 pwp->pw_gecos = up->u_comment; 1352 if (up->u_flags & F_HOMEDIR) 1353 pwp->pw_dir = up->u_home; 1354 if (up->u_flags & F_SHELL) 1355 pwp->pw_shell = up->u_shell; 1356 #ifdef EXTENSIONS 1357 if (up->u_flags & F_CLASS) { 1358 if (!valid_class(up->u_class)) { 1359 (void) close(ptmpfd); 1360 pw_abort(); 1361 errx(EXIT_FAILURE, 1362 "No such login class `%s'", up->u_class); 1363 } 1364 pwp->pw_class = up->u_class; 1365 } 1366 #endif 1367 } 1368 loginc = strlen(login_name); 1369 while (fgets(buf, sizeof(buf), master) != NULL) { 1370 if ((colon = strchr(buf, ':')) == NULL) { 1371 warnx("Malformed entry `%s'. Skipping", buf); 1372 continue; 1373 } 1374 colonc = (size_t)(colon - buf); 1375 if (strncmp(login_name, buf, loginc) == 0 && loginc == colonc) { 1376 if (up != NULL) { 1377 if ((len = snprintf(buf, sizeof(buf), 1378 "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1379 newlogin, 1380 pwp->pw_passwd, 1381 pwp->pw_uid, 1382 pwp->pw_gid, 1383 #ifdef EXTENSIONS 1384 pwp->pw_class, 1385 #else 1386 "", 1387 #endif 1388 (long)pwp->pw_change, 1389 (long)pwp->pw_expire, 1390 pwp->pw_gecos, 1391 pwp->pw_dir, 1392 pwp->pw_shell)) >= sizeof(buf) || len < 0 || 1393 len + expand_len(pwp->pw_gecos, newlogin) 1394 >= 1023) { 1395 (void) close(ptmpfd); 1396 pw_abort(); 1397 errx(EXIT_FAILURE, "can't add `%s', " 1398 "line too long (%d bytes)", buf, 1399 len + expand_len(pwp->pw_gecos, 1400 newlogin)); 1401 } 1402 if (write(ptmpfd, buf, len) != len) { 1403 (void) close(ptmpfd); 1404 pw_abort(); 1405 err(EXIT_FAILURE, "can't add `%s'", buf); 1406 } 1407 } 1408 } else { 1409 len = strlen(buf); 1410 if ((cc = write(ptmpfd, buf, len)) != len) { 1411 (void) close(masterfd); 1412 (void) close(ptmpfd); 1413 pw_abort(); 1414 err(EXIT_FAILURE, "short write to /etc/ptmp (%lld not %lld chars)", 1415 (long long)cc, (long long)len); 1416 } 1417 } 1418 } 1419 if (up != NULL) { 1420 if ((up->u_flags & F_MKDIR) && 1421 asystem("%s %s %s", MV, homedir, pwp->pw_dir) != 0) { 1422 (void) close(ptmpfd); 1423 pw_abort(); 1424 err(EXIT_FAILURE, "can't move `%s' to `%s'", 1425 homedir, pwp->pw_dir); 1426 } 1427 if (up->u_groupc > 0 && 1428 !append_group(newlogin, up->u_groupc, up->u_groupv)) { 1429 (void) close(ptmpfd); 1430 pw_abort(); 1431 errx(EXIT_FAILURE, "can't append `%s' to new groups", 1432 newlogin); 1433 } 1434 } 1435 (void) close(ptmpfd); 1436 if (up != NULL && strcmp(login_name, newlogin) == 0) 1437 rval = pw_mkdb(login_name, 0); 1438 else 1439 rval = pw_mkdb(NULL, 0); 1440 if (rval == -1) { 1441 pw_abort(); 1442 err(EXIT_FAILURE, "pw_mkdb failed"); 1443 } 1444 if (up == NULL) { 1445 syslog(LOG_INFO, "user removed: name=%s", login_name); 1446 } else if (strcmp(login_name, newlogin) == 0) { 1447 syslog(LOG_INFO, "user information modified: name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1448 login_name, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, pwp->pw_shell); 1449 } else { 1450 syslog(LOG_INFO, "user information modified: name=%s, new name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1451 login_name, newlogin, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, pwp->pw_shell); 1452 } 1453 return 1; 1454 } 1455 1456 1457 #ifdef EXTENSIONS 1458 /* see if we can find out the user struct */ 1459 static struct passwd * 1460 find_user_info(char *name) 1461 { 1462 struct passwd *pwp; 1463 1464 if ((pwp = getpwnam(name)) != NULL) { 1465 return pwp; 1466 } 1467 if (is_number(name) && (pwp = getpwuid((uid_t)atoi(name))) != NULL) { 1468 return pwp; 1469 } 1470 return NULL; 1471 } 1472 #endif 1473 1474 #ifdef EXTENSIONS 1475 /* see if we can find out the group struct */ 1476 static struct group * 1477 find_group_info(char *name) 1478 { 1479 struct group *grp; 1480 1481 if ((grp = getgrnam(name)) != NULL) { 1482 return grp; 1483 } 1484 if (is_number(name) && (grp = getgrgid((gid_t)atoi(name))) != NULL) { 1485 return grp; 1486 } 1487 return NULL; 1488 } 1489 #endif 1490 1491 /* print out usage message, and then exit */ 1492 void 1493 usermgmt_usage(const char *prog) 1494 { 1495 if (strcmp(prog, "useradd") == 0) { 1496 (void) fprintf(stderr, "usage: %s -D [-b basedir] [-e expiry] " 1497 "[-f changetime] [-g group]\n\t\t[-k skeletondir] " 1498 "[-r low..high] [-s shell] [-L class]\n", prog); 1499 (void) fprintf(stderr, "usage: %s [-mov] [-G group[,group,...]]" 1500 " [-b basedir] [-c comment]\n\t\t" 1501 "[-d homedir] [-e expiry] [-f changetime] [-g group]\n\t\t" 1502 "[-k skeletondir] [-p password] " 1503 "[-r lowuid..highuid]\n\t\t[-s shell] [-u uid] [-L class] " 1504 "user\n", prog); 1505 } else if (strcmp(prog, "usermod") == 0) { 1506 (void) fprintf(stderr, "usage: %s [-mov] [-G group[,group,...]]" 1507 " [-c comment] [-d homedir]\n\t\t" 1508 "[-e expire] [-f changetime] [-g group] [-l newname]\n\t\t" 1509 "[-p password] [-s shell] [-u uid] [-L class] user\n", 1510 prog); 1511 } else if (strcmp(prog, "userdel") == 0) { 1512 (void) fprintf(stderr, "usage: %s -D [-p preserve]\n", prog); 1513 (void) fprintf(stderr, "usage: %s [-prv] user\n", prog); 1514 #ifdef EXTENSIONS 1515 } else if (strcmp(prog, "userinfo") == 0) { 1516 (void) fprintf(stderr, "usage: %s [-ev] user\n", prog); 1517 #endif 1518 } else if (strcmp(prog, "groupadd") == 0) { 1519 (void) fprintf(stderr, "usage: %s [-ov] [-g gid] group\n", 1520 prog); 1521 } else if (strcmp(prog, "groupdel") == 0) { 1522 (void) fprintf(stderr, "usage: %s [-v] group\n", prog); 1523 } else if (strcmp(prog, "groupmod") == 0) { 1524 (void) fprintf(stderr, "usage: %s [-ov] [-g gid] [-n newname] " 1525 "group\n", prog); 1526 } else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) { 1527 (void) fprintf(stderr, "usage: %s [ add | del | mod " 1528 #ifdef EXTENSIONS 1529 "| info " 1530 #endif 1531 "] ...\n", 1532 prog); 1533 #ifdef EXTENSIONS 1534 } else if (strcmp(prog, "groupinfo") == 0) { 1535 (void) fprintf(stderr, "usage: %s [-ev] group\n", prog); 1536 #endif 1537 } else { 1538 (void) fprintf(stderr, "This program must be called as {user,group}{add,del,mod,info},\n%s is not an understood name.\n", prog); 1539 } 1540 exit(EXIT_FAILURE); 1541 /* NOTREACHED */ 1542 } 1543 1544 #ifdef EXTENSIONS 1545 #define ADD_OPT_EXTENSIONS "p:r:vL:" 1546 #else 1547 #define ADD_OPT_EXTENSIONS 1548 #endif 1549 1550 int 1551 useradd(int argc, char **argv) 1552 { 1553 user_t u; 1554 int defaultfield; 1555 int bigD; 1556 int c; 1557 #ifdef EXTENSIONS 1558 int i; 1559 #endif 1560 1561 (void) memset(&u, 0, sizeof(u)); 1562 read_defaults(&u); 1563 u.u_uid = UID_MAX; 1564 defaultfield = bigD = 0; 1565 while ((c = getopt(argc, argv, "DG:b:c:d:e:f:g:k:mou:s:" ADD_OPT_EXTENSIONS)) != -1) { 1566 switch(c) { 1567 case 'D': 1568 bigD = 1; 1569 break; 1570 case 'G': 1571 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1572 u.u_groupc < NGROUPS_MAX - 2) { 1573 if (u.u_groupv[u.u_groupc][0] != 0) { 1574 u.u_groupc++; 1575 } 1576 } 1577 if (optarg != NULL) { 1578 warnx("Truncated list of secondary groups to %d entries", NGROUPS_MAX - 2); 1579 } 1580 break; 1581 case 'b': 1582 defaultfield = 1; 1583 memsave(&u.u_basedir, optarg, strlen(optarg)); 1584 break; 1585 case 'c': 1586 memsave(&u.u_comment, optarg, strlen(optarg)); 1587 break; 1588 case 'd': 1589 memsave(&u.u_home, optarg, strlen(optarg)); 1590 u.u_flags |= F_HOMEDIR; 1591 break; 1592 case 'e': 1593 defaultfield = 1; 1594 memsave(&u.u_expire, optarg, strlen(optarg)); 1595 break; 1596 case 'f': 1597 defaultfield = 1; 1598 memsave(&u.u_inactive, optarg, strlen(optarg)); 1599 break; 1600 case 'g': 1601 defaultfield = 1; 1602 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1603 break; 1604 case 'k': 1605 defaultfield = 1; 1606 memsave(&u.u_skeldir, optarg, strlen(optarg)); 1607 break; 1608 #ifdef EXTENSIONS 1609 case 'L': 1610 defaultfield = 1; 1611 memsave(&u.u_class, optarg, strlen(optarg)); 1612 break; 1613 #endif 1614 case 'm': 1615 u.u_flags |= F_MKDIR; 1616 break; 1617 case 'o': 1618 u.u_flags |= F_DUPUID; 1619 break; 1620 #ifdef EXTENSIONS 1621 case 'p': 1622 memsave(&u.u_password, optarg, strlen(optarg)); 1623 break; 1624 #endif 1625 #ifdef EXTENSIONS 1626 case 'r': 1627 defaultfield = 1; 1628 (void) save_range(&u, optarg); 1629 break; 1630 #endif 1631 case 's': 1632 defaultfield = 1; 1633 memsave(&u.u_shell, optarg, strlen(optarg)); 1634 break; 1635 case 'u': 1636 if (!is_number(optarg)) { 1637 errx(EXIT_FAILURE, "When using [-u uid], the uid must be numeric"); 1638 } 1639 u.u_uid = atoi(optarg); 1640 break; 1641 #ifdef EXTENSIONS 1642 case 'v': 1643 verbose = 1; 1644 break; 1645 #endif 1646 default: 1647 usermgmt_usage("useradd"); 1648 /* NOTREACHED */ 1649 } 1650 } 1651 if (bigD) { 1652 if (defaultfield) { 1653 checkeuid(); 1654 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1655 } 1656 (void) printf("group\t\t%s\n", u.u_primgrp); 1657 (void) printf("base_dir\t%s\n", u.u_basedir); 1658 (void) printf("skel_dir\t%s\n", u.u_skeldir); 1659 (void) printf("shell\t\t%s\n", u.u_shell); 1660 #ifdef EXTENSIONS 1661 (void) printf("class\t\t%s\n", u.u_class); 1662 #endif 1663 (void) printf("inactive\t%s\n", (u.u_inactive == NULL) ? UNSET_INACTIVE : u.u_inactive); 1664 (void) printf("expire\t\t%s\n", (u.u_expire == NULL) ? UNSET_EXPIRY : u.u_expire); 1665 #ifdef EXTENSIONS 1666 for (i = 0 ; i < u.u_rc ; i++) { 1667 (void) printf("range\t\t%d..%d\n", u.u_rv[i].r_from, u.u_rv[i].r_to); 1668 } 1669 #endif 1670 return EXIT_SUCCESS; 1671 } 1672 argc -= optind; 1673 argv += optind; 1674 if (argc != 1) { 1675 usermgmt_usage("useradd"); 1676 } 1677 checkeuid(); 1678 openlog("useradd", LOG_PID, LOG_USER); 1679 return adduser(*argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1680 } 1681 1682 #ifdef EXTENSIONS 1683 #define MOD_OPT_EXTENSIONS "p:vL:" 1684 #else 1685 #define MOD_OPT_EXTENSIONS 1686 #endif 1687 1688 int 1689 usermod(int argc, char **argv) 1690 { 1691 user_t u; 1692 char newuser[MaxUserNameLen + 1]; 1693 int c, have_new_user; 1694 1695 (void) memset(&u, 0, sizeof(u)); 1696 (void) memset(newuser, 0, sizeof(newuser)); 1697 read_defaults(&u); 1698 free(u.u_primgrp); 1699 u.u_primgrp = NULL; 1700 have_new_user = 0; 1701 while ((c = getopt(argc, argv, "G:c:d:e:f:g:l:mos:u:" MOD_OPT_EXTENSIONS)) != -1) { 1702 switch(c) { 1703 case 'G': 1704 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1705 u.u_groupc < NGROUPS_MAX - 2) { 1706 if (u.u_groupv[u.u_groupc][0] != 0) { 1707 u.u_groupc++; 1708 } 1709 } 1710 if (optarg != NULL) { 1711 warnx("Truncated list of secondary groups to %d entries", NGROUPS_MAX - 2); 1712 } 1713 u.u_flags |= F_SECGROUP; 1714 break; 1715 case 'c': 1716 memsave(&u.u_comment, optarg, strlen(optarg)); 1717 u.u_flags |= F_COMMENT; 1718 break; 1719 case 'd': 1720 memsave(&u.u_home, optarg, strlen(optarg)); 1721 u.u_flags |= F_HOMEDIR; 1722 break; 1723 case 'e': 1724 memsave(&u.u_expire, optarg, strlen(optarg)); 1725 u.u_flags |= F_EXPIRE; 1726 break; 1727 case 'f': 1728 memsave(&u.u_inactive, optarg, strlen(optarg)); 1729 u.u_flags |= F_INACTIVE; 1730 break; 1731 case 'g': 1732 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1733 u.u_flags |= F_GROUP; 1734 break; 1735 case 'l': 1736 (void) strlcpy(newuser, optarg, sizeof(newuser)); 1737 have_new_user = 1; 1738 u.u_flags |= F_USERNAME; 1739 break; 1740 #ifdef EXTENSIONS 1741 case 'L': 1742 memsave(&u.u_class, optarg, strlen(optarg)); 1743 u.u_flags |= F_CLASS; 1744 break; 1745 #endif 1746 case 'm': 1747 u.u_flags |= F_MKDIR; 1748 break; 1749 case 'o': 1750 u.u_flags |= F_DUPUID; 1751 break; 1752 #ifdef EXTENSIONS 1753 case 'p': 1754 memsave(&u.u_password, optarg, strlen(optarg)); 1755 u.u_flags |= F_PASSWORD; 1756 break; 1757 #endif 1758 case 's': 1759 memsave(&u.u_shell, optarg, strlen(optarg)); 1760 u.u_flags |= F_SHELL; 1761 break; 1762 case 'u': 1763 if (!is_number(optarg)) { 1764 errx(EXIT_FAILURE, "When using [-u uid], the uid must be numeric"); 1765 } 1766 u.u_uid = atoi(optarg); 1767 u.u_flags |= F_UID; 1768 break; 1769 #ifdef EXTENSIONS 1770 case 'v': 1771 verbose = 1; 1772 break; 1773 #endif 1774 default: 1775 usermgmt_usage("usermod"); 1776 /* NOTREACHED */ 1777 } 1778 } 1779 if ((u.u_flags & F_MKDIR) && !(u.u_flags & F_HOMEDIR) && 1780 !(u.u_flags & F_USERNAME)) { 1781 warnx("option 'm' useless without 'd' or 'l' -- ignored"); 1782 u.u_flags &= ~F_MKDIR; 1783 } 1784 argc -= optind; 1785 argv += optind; 1786 if (argc != 1) { 1787 usermgmt_usage("usermod"); 1788 } 1789 checkeuid(); 1790 openlog("usermod", LOG_PID, LOG_USER); 1791 return moduser(*argv, (have_new_user) ? newuser : *argv, &u) ? 1792 EXIT_SUCCESS : EXIT_FAILURE; 1793 } 1794 1795 #ifdef EXTENSIONS 1796 #define DEL_OPT_EXTENSIONS "Dp:v" 1797 #else 1798 #define DEL_OPT_EXTENSIONS 1799 #endif 1800 1801 int 1802 userdel(int argc, char **argv) 1803 { 1804 struct passwd *pwp; 1805 user_t u; 1806 char password[PasswordLength + 1]; 1807 int defaultfield; 1808 int rmhome; 1809 int bigD; 1810 int c; 1811 1812 (void) memset(&u, 0, sizeof(u)); 1813 read_defaults(&u); 1814 defaultfield = bigD = rmhome = 0; 1815 while ((c = getopt(argc, argv, "r" DEL_OPT_EXTENSIONS)) != -1) { 1816 switch(c) { 1817 #ifdef EXTENSIONS 1818 case 'D': 1819 bigD = 1; 1820 break; 1821 #endif 1822 #ifdef EXTENSIONS 1823 case 'p': 1824 defaultfield = 1; 1825 u.u_preserve = (strcmp(optarg, "true") == 0) ? 1 : 1826 (strcmp(optarg, "yes") == 0) ? 1 : 1827 atoi(optarg); 1828 break; 1829 #endif 1830 case 'r': 1831 rmhome = 1; 1832 break; 1833 #ifdef EXTENSIONS 1834 case 'v': 1835 verbose = 1; 1836 break; 1837 #endif 1838 default: 1839 usermgmt_usage("userdel"); 1840 /* NOTREACHED */ 1841 } 1842 } 1843 #ifdef EXTENSIONS 1844 if (bigD) { 1845 if (defaultfield) { 1846 checkeuid(); 1847 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1848 } 1849 (void) printf("preserve\t%s\n", (u.u_preserve) ? "true" : "false"); 1850 return EXIT_SUCCESS; 1851 } 1852 #endif 1853 argc -= optind; 1854 argv += optind; 1855 if (argc != 1) { 1856 usermgmt_usage("userdel"); 1857 } 1858 checkeuid(); 1859 if ((pwp = getpwnam(*argv)) == NULL) { 1860 warnx("No such user `%s'", *argv); 1861 return EXIT_FAILURE; 1862 } 1863 if (rmhome) 1864 (void)removehomedir(pwp->pw_name, pwp->pw_uid, pwp->pw_dir); 1865 if (u.u_preserve) { 1866 u.u_flags |= F_SHELL; 1867 memsave(&u.u_shell, NOLOGIN, strlen(NOLOGIN)); 1868 (void) memset(password, '*', DES_Len); 1869 password[DES_Len] = 0; 1870 memsave(&u.u_password, password, strlen(password)); 1871 u.u_flags |= F_PASSWORD; 1872 openlog("userdel", LOG_PID, LOG_USER); 1873 return moduser(*argv, *argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1874 } 1875 if (!rm_user_from_groups(*argv)) { 1876 return 0; 1877 } 1878 openlog("userdel", LOG_PID, LOG_USER); 1879 return moduser(*argv, *argv, NULL) ? EXIT_SUCCESS : EXIT_FAILURE; 1880 } 1881 1882 #ifdef EXTENSIONS 1883 #define GROUP_ADD_OPT_EXTENSIONS "v" 1884 #else 1885 #define GROUP_ADD_OPT_EXTENSIONS 1886 #endif 1887 1888 /* add a group */ 1889 int 1890 groupadd(int argc, char **argv) 1891 { 1892 int dupgid; 1893 int gid; 1894 int c; 1895 1896 gid = GID_MAX; 1897 dupgid = 0; 1898 while ((c = getopt(argc, argv, "g:o" GROUP_ADD_OPT_EXTENSIONS)) != -1) { 1899 switch(c) { 1900 case 'g': 1901 if (!is_number(optarg)) { 1902 errx(EXIT_FAILURE, "When using [-g gid], the gid must be numeric"); 1903 } 1904 gid = atoi(optarg); 1905 break; 1906 case 'o': 1907 dupgid = 1; 1908 break; 1909 #ifdef EXTENSIONS 1910 case 'v': 1911 verbose = 1; 1912 break; 1913 #endif 1914 default: 1915 usermgmt_usage("groupadd"); 1916 /* NOTREACHED */ 1917 } 1918 } 1919 argc -= optind; 1920 argv += optind; 1921 if (argc != 1) { 1922 usermgmt_usage("groupadd"); 1923 } 1924 checkeuid(); 1925 if (!valid_group(*argv)) { 1926 errx(EXIT_FAILURE, "invalid group name `%s'", *argv); 1927 } 1928 if (gid < 0 && !getnextgid(&gid, LowGid, HighGid)) { 1929 errx(EXIT_FAILURE, "can't add group: can't get next gid"); 1930 } 1931 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 1932 errx(EXIT_FAILURE, "can't add group: gid %d is a duplicate", gid); 1933 } 1934 openlog("groupadd", LOG_PID, LOG_USER); 1935 if (!creategid(*argv, gid, "")) { 1936 errx(EXIT_FAILURE, "can't add group: problems with %s file", 1937 _PATH_GROUP); 1938 } 1939 return EXIT_SUCCESS; 1940 } 1941 1942 #ifdef EXTENSIONS 1943 #define GROUP_DEL_OPT_EXTENSIONS "v" 1944 #else 1945 #define GROUP_DEL_OPT_EXTENSIONS 1946 #endif 1947 1948 /* remove a group */ 1949 int 1950 groupdel(int argc, char **argv) 1951 { 1952 int c; 1953 1954 while ((c = getopt(argc, argv, "" GROUP_DEL_OPT_EXTENSIONS)) != -1) { 1955 switch(c) { 1956 #ifdef EXTENSIONS 1957 case 'v': 1958 verbose = 1; 1959 break; 1960 #endif 1961 default: 1962 usermgmt_usage("groupdel"); 1963 /* NOTREACHED */ 1964 } 1965 } 1966 argc -= optind; 1967 argv += optind; 1968 if (argc != 1) { 1969 usermgmt_usage("groupdel"); 1970 } 1971 checkeuid(); 1972 openlog("groupdel", LOG_PID, LOG_USER); 1973 if (getgrnam(*argv) == NULL) { 1974 warnx("No such group: `%s'", *argv); 1975 return EXIT_FAILURE; 1976 } 1977 if (!modify_gid(*argv, NULL)) { 1978 err(EXIT_FAILURE, "can't change %s file", _PATH_GROUP); 1979 } 1980 return EXIT_SUCCESS; 1981 } 1982 1983 #ifdef EXTENSIONS 1984 #define GROUP_MOD_OPT_EXTENSIONS "v" 1985 #else 1986 #define GROUP_MOD_OPT_EXTENSIONS 1987 #endif 1988 1989 /* modify a group */ 1990 int 1991 groupmod(int argc, char **argv) 1992 { 1993 struct group *grp; 1994 char buf[LINE_MAX]; 1995 char *newname; 1996 char **cpp; 1997 int dupgid; 1998 int gid; 1999 int cc; 2000 int c; 2001 2002 gid = GID_MAX; 2003 dupgid = 0; 2004 newname = NULL; 2005 while ((c = getopt(argc, argv, "g:on:" GROUP_MOD_OPT_EXTENSIONS)) != -1) { 2006 switch(c) { 2007 case 'g': 2008 if (!is_number(optarg)) { 2009 errx(EXIT_FAILURE, "When using [-g gid], the gid must be numeric"); 2010 } 2011 gid = atoi(optarg); 2012 break; 2013 case 'o': 2014 dupgid = 1; 2015 break; 2016 case 'n': 2017 memsave(&newname, optarg, strlen(optarg)); 2018 break; 2019 #ifdef EXTENSIONS 2020 case 'v': 2021 verbose = 1; 2022 break; 2023 #endif 2024 default: 2025 usermgmt_usage("groupmod"); 2026 /* NOTREACHED */ 2027 } 2028 } 2029 argc -= optind; 2030 argv += optind; 2031 if (argc != 1) { 2032 usermgmt_usage("groupmod"); 2033 } 2034 checkeuid(); 2035 if (gid < 0 && newname == NULL) { 2036 errx(EXIT_FAILURE, "Nothing to change"); 2037 } 2038 if (dupgid && gid < 0) { 2039 errx(EXIT_FAILURE, "Duplicate which gid?"); 2040 } 2041 if (!is_local(*argv, _PATH_GROUP)) { 2042 errx(EXIT_FAILURE, "Group `%s' must be a local group", *argv); 2043 } 2044 if ((grp = getgrnam(*argv)) == NULL) { 2045 errx(EXIT_FAILURE, "can't find group `%s' to modify", *argv); 2046 } 2047 if (newname != NULL && !valid_group(newname)) { 2048 errx(EXIT_FAILURE, "invalid group name `%s'", newname); 2049 } 2050 if ((cc = snprintf(buf, sizeof(buf), "%s:%s:%u:", 2051 (newname) ? newname : grp->gr_name, grp->gr_passwd, 2052 (gid < 0) ? grp->gr_gid : gid)) >= sizeof(buf) || cc < 0) 2053 errx(EXIT_FAILURE, "group `%s' entry too long", grp->gr_name); 2054 2055 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2056 cc = strlcat(buf, *cpp, sizeof(buf)) + 1; 2057 if (cc >= sizeof(buf)) 2058 errx(EXIT_FAILURE, "group `%s' entry too long", 2059 grp->gr_name); 2060 if (cpp[1] != NULL) { 2061 buf[cc - 1] = ','; 2062 buf[cc] = '\0'; 2063 } 2064 } 2065 cc = strlcat(buf, "\n", sizeof(buf)); 2066 if (cc >= sizeof(buf)) 2067 errx(EXIT_FAILURE, "group `%s' entry too long", grp->gr_name); 2068 2069 openlog("groupmod", LOG_PID, LOG_USER); 2070 if (!modify_gid(*argv, buf)) 2071 err(EXIT_FAILURE, "can't change %s file", _PATH_GROUP); 2072 return EXIT_SUCCESS; 2073 } 2074 2075 #ifdef EXTENSIONS 2076 /* display user information */ 2077 int 2078 userinfo(int argc, char **argv) 2079 { 2080 struct passwd *pwp; 2081 struct group *grp; 2082 char **cpp; 2083 int exists; 2084 int i; 2085 2086 exists = 0; 2087 while ((i = getopt(argc, argv, "ev")) != -1) { 2088 switch(i) { 2089 case 'e': 2090 exists = 1; 2091 break; 2092 case 'v': 2093 verbose = 1; 2094 break; 2095 default: 2096 usermgmt_usage("userinfo"); 2097 /* NOTREACHED */ 2098 } 2099 } 2100 argc -= optind; 2101 argv += optind; 2102 if (argc != 1) { 2103 usermgmt_usage("userinfo"); 2104 } 2105 pwp = find_user_info(*argv); 2106 if (exists) { 2107 exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE); 2108 } 2109 if (pwp == NULL) { 2110 errx(EXIT_FAILURE, "can't find user `%s'", *argv); 2111 } 2112 (void) printf("login\t%s\n", pwp->pw_name); 2113 (void) printf("passwd\t%s\n", pwp->pw_passwd); 2114 (void) printf("uid\t%u\n", pwp->pw_uid); 2115 if ((grp = getgrgid(pwp->pw_gid)) == NULL) 2116 (void) printf("groups\t%u", pwp->pw_gid); 2117 else 2118 (void) printf("groups\t%s", grp->gr_name); 2119 while ((grp = getgrent()) != NULL) { 2120 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2121 if (strcmp(*cpp, *argv) == 0 && grp->gr_gid != pwp->pw_gid) 2122 (void) printf(" %s", grp->gr_name); 2123 } 2124 } 2125 (void) fputc('\n', stdout); 2126 (void) printf("change\t%s", pwp->pw_change ? ctime(&pwp->pw_change) : "NEVER\n"); 2127 #ifdef EXTENSIONS 2128 (void) printf("class\t%s\n", pwp->pw_class); 2129 #endif 2130 (void) printf("gecos\t%s\n", pwp->pw_gecos); 2131 (void) printf("dir\t%s\n", pwp->pw_dir); 2132 (void) printf("shell\t%s\n", pwp->pw_shell); 2133 (void) printf("expire\t%s", pwp->pw_expire ? ctime(&pwp->pw_expire) : "NEVER\n"); 2134 return EXIT_SUCCESS; 2135 } 2136 #endif 2137 2138 #ifdef EXTENSIONS 2139 /* display user information */ 2140 int 2141 groupinfo(int argc, char **argv) 2142 { 2143 struct group *grp; 2144 char **cpp; 2145 int exists; 2146 int i; 2147 2148 exists = 0; 2149 while ((i = getopt(argc, argv, "ev")) != -1) { 2150 switch(i) { 2151 case 'e': 2152 exists = 1; 2153 break; 2154 case 'v': 2155 verbose = 1; 2156 break; 2157 default: 2158 usermgmt_usage("groupinfo"); 2159 /* NOTREACHED */ 2160 } 2161 } 2162 argc -= optind; 2163 argv += optind; 2164 if (argc != 1) { 2165 usermgmt_usage("groupinfo"); 2166 } 2167 grp = find_group_info(*argv); 2168 if (exists) { 2169 exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE); 2170 } 2171 if (grp == NULL) { 2172 errx(EXIT_FAILURE, "can't find group `%s'", *argv); 2173 } 2174 (void) printf("name\t%s\n", grp->gr_name); 2175 (void) printf("passwd\t%s\n", grp->gr_passwd); 2176 (void) printf("gid\t%u\n", grp->gr_gid); 2177 (void) printf("members\t"); 2178 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2179 (void) printf("%s ", *cpp); 2180 } 2181 (void) fputc('\n', stdout); 2182 return EXIT_SUCCESS; 2183 } 2184 #endif 2185