1 /* $OpenBSD: user.c,v 1.72 2007/08/02 16:18:05 deraadt 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 <stdarg.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <syslog.h> 53 #include <time.h> 54 #include <unistd.h> 55 #include <util.h> 56 57 #include "defs.h" 58 #include "usermgmt.h" 59 60 61 /* this struct describes a uid range */ 62 typedef struct range_t { 63 uid_t r_from; /* low uid */ 64 uid_t r_to; /* high uid */ 65 } range_t; 66 67 /* this struct encapsulates the user information */ 68 typedef struct user_t { 69 int u_flags; /* see below */ 70 uid_t u_uid; /* uid of user */ 71 char *u_password; /* encrypted password */ 72 char *u_comment; /* comment field */ 73 char *u_home; /* home directory */ 74 char *u_primgrp; /* primary group */ 75 int u_groupc; /* # of secondary groups */ 76 const char *u_groupv[NGROUPS_MAX]; /* secondary groups */ 77 char *u_shell; /* user's shell */ 78 char *u_basedir; /* base directory for home */ 79 char *u_expire; /* when account will expire */ 80 char *u_inactive; /* when password will expire */ 81 char *u_skeldir; /* directory for startup files */ 82 char *u_class; /* login class */ 83 unsigned int u_rsize; /* size of range array */ 84 unsigned int u_rc; /* # of ranges */ 85 range_t *u_rv; /* the ranges */ 86 unsigned int u_defrc; /* # of ranges in defaults */ 87 int u_preserve; /* preserve uids on deletion */ 88 } user_t; 89 90 /* flags for which fields of the user_t replace the passwd entry */ 91 enum { 92 F_COMMENT = 0x0001, 93 F_DUPUID = 0x0002, 94 F_EXPIRE = 0x0004, 95 F_GROUP = 0x0008, 96 F_HOMEDIR = 0x0010, 97 F_MKDIR = 0x0020, 98 F_INACTIVE = 0x0040, 99 F_PASSWORD = 0x0080, 100 F_SECGROUP = 0x0100, 101 F_SHELL = 0x0200, 102 F_UID = 0x0400, 103 F_USERNAME = 0x0800, 104 F_CLASS = 0x1000 105 }; 106 107 #define CONFFILE "/etc/usermgmt.conf" 108 109 #ifndef DEF_GROUP 110 #define DEF_GROUP "users" 111 #endif 112 113 #ifndef DEF_BASEDIR 114 #define DEF_BASEDIR "/home" 115 #endif 116 117 #ifndef DEF_SKELDIR 118 #define DEF_SKELDIR "/etc/skel" 119 #endif 120 121 #ifndef DEF_SHELL 122 #define DEF_SHELL _PATH_KSHELL 123 #endif 124 125 #ifndef DEF_COMMENT 126 #define DEF_COMMENT "" 127 #endif 128 129 #ifndef DEF_LOWUID 130 #define DEF_LOWUID 1000 131 #endif 132 133 #ifndef DEF_HIGHUID 134 #define DEF_HIGHUID 60000 135 #endif 136 137 #ifndef DEF_INACTIVE 138 #define DEF_INACTIVE 0 139 #endif 140 141 #ifndef DEF_EXPIRE 142 #define DEF_EXPIRE NULL 143 #endif 144 145 #ifndef DEF_CLASS 146 #define DEF_CLASS "" 147 #endif 148 149 #ifndef WAITSECS 150 #define WAITSECS 10 151 #endif 152 153 #ifndef NOBODY_UID 154 #define NOBODY_UID 32767 155 #endif 156 157 /* some useful constants */ 158 enum { 159 MaxShellNameLen = 256, 160 MaxFileNameLen = MAXPATHLEN, 161 MaxUserNameLen = _PW_NAME_LEN, 162 MaxCommandLen = 2048, 163 PasswordLength = _PASSWORD_LEN, 164 165 DES_Len = 13, 166 167 LowGid = DEF_LOWUID, 168 HighGid = DEF_HIGHUID 169 }; 170 171 /* Full paths of programs used here */ 172 #define CHMOD "/bin/chmod" 173 #define CHOWN "/sbin/chown" 174 #define MKDIR "/bin/mkdir" 175 #define MV "/bin/mv" 176 #define NOLOGIN "/sbin/nologin" 177 #define PAX "/bin/pax" 178 #define RM "/bin/rm" 179 180 #define UNSET_INACTIVE "Null (unset)" 181 #define UNSET_EXPIRY "Null (unset)" 182 183 static int asystem(const char *fmt, ...) 184 __attribute__((__format__(__printf__, 1, 2))); 185 186 static int verbose; 187 188 /* if *cpp is non-null, free it, then assign `n' chars of `s' to it */ 189 static void 190 memsave(char **cpp, const char *s, size_t n) 191 { 192 if (*cpp != NULL) { 193 FREE(*cpp); 194 } 195 NEWARRAY(char, *cpp, n + 1, exit(1)); 196 (void) memcpy(*cpp, s, n); 197 (*cpp)[n] = '\0'; 198 } 199 200 /* a replacement for system(3) */ 201 static int 202 asystem(const char *fmt, ...) 203 { 204 va_list vp; 205 char buf[MaxCommandLen]; 206 int ret; 207 208 va_start(vp, fmt); 209 (void) vsnprintf(buf, sizeof(buf), fmt, vp); 210 va_end(vp); 211 if (verbose) { 212 (void) printf("Command: %s\n", buf); 213 } 214 if ((ret = system(buf)) != 0) { 215 warnx("[Warning] can't system `%s'", buf); 216 } 217 return ret; 218 } 219 220 /* remove a users home directory, returning 1 for success (ie, no problems encountered) */ 221 static int 222 removehomedir(const char *user, uid_t uid, const char *dir) 223 { 224 struct stat st; 225 226 /* userid not root? */ 227 if (uid == 0) { 228 warnx("Not deleting home directory `%s'; userid is 0", dir); 229 return 0; 230 } 231 232 /* directory exists (and is a directory!) */ 233 if (stat(dir, &st) < 0) { 234 warnx("Home directory `%s' doesn't exist", dir); 235 return 0; 236 } 237 if (!S_ISDIR(st.st_mode)) { 238 warnx("Home directory `%s' is not a directory", dir); 239 return 0; 240 } 241 242 /* userid matches directory owner? */ 243 if (st.st_uid != uid) { 244 warnx("User `%s' doesn't own directory `%s', not removed", 245 user, dir); 246 return 0; 247 } 248 249 (void) seteuid(uid); 250 /* we add the "|| true" to keep asystem() quiet if there is a non-zero exit status. */ 251 (void) asystem("%s -rf %s > /dev/null 2>&1 || true", RM, dir); 252 (void) seteuid(0); 253 if (rmdir(dir) < 0) { 254 warnx("Unable to remove all files in `%s'", dir); 255 return 0; 256 } 257 return 1; 258 } 259 260 /* return 1 if all of `s' is numeric */ 261 static int 262 is_number(char *s) 263 { 264 for ( ; *s ; s++) { 265 if (!isdigit((unsigned char) *s)) { 266 return 0; 267 } 268 } 269 return 1; 270 } 271 272 /* 273 * check that the effective uid is 0 - called from funcs which will 274 * modify data and config files. 275 */ 276 static void 277 checkeuid(void) 278 { 279 if (geteuid() != 0) { 280 errx(EXIT_FAILURE, "Program must be run as root"); 281 } 282 } 283 284 /* copy any dot files into the user's home directory */ 285 static int 286 copydotfiles(char *skeldir, uid_t uid, gid_t gid, char *dir) 287 { 288 struct dirent *dp; 289 DIR *dirp; 290 int n; 291 292 if ((dirp = opendir(skeldir)) == NULL) { 293 warn("can't open source . files dir `%s'", skeldir); 294 return 0; 295 } 296 for (n = 0; (dp = readdir(dirp)) != NULL && n == 0 ; ) { 297 if (strcmp(dp->d_name, ".") == 0 || 298 strcmp(dp->d_name, "..") == 0) { 299 continue; 300 } 301 n = 1; 302 } 303 (void) closedir(dirp); 304 if (n == 0) { 305 warnx("No \"dot\" initialisation files found"); 306 } else { 307 (void) asystem("cd %s && %s -rw -pe %s . %s", 308 skeldir, PAX, (verbose) ? "-v" : "", dir); 309 } 310 (void) asystem("%s -R -P %u:%u %s", CHOWN, uid, gid, dir); 311 (void) asystem("%s -R u+w %s", CHMOD, dir); 312 return n; 313 } 314 315 /* create a group entry with gid `gid' */ 316 static int 317 creategid(char *group, gid_t gid, const char *name) 318 { 319 struct stat st; 320 FILE *from; 321 FILE *to; 322 char *buf; 323 char f[MaxFileNameLen]; 324 int fd, ret; 325 int wroteit = 0; 326 size_t len; 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 ((buf = fgetln(from, &len)) != NULL && len > 0) { 355 ret = 0; 356 if (buf[0] == '+' && wroteit == 0) { 357 ret = fprintf(to, "%s:*:%u:%s\n", group, gid, name); 358 wroteit = 1; 359 } 360 if (ret == -1 || 361 fprintf(to, "%*.*s", (int)len, (int)len, buf) != len) { 362 (void) fclose(from); 363 (void) fclose(to); 364 (void) unlink(f); 365 warn("can't create gid: short write to `%s'", f); 366 return 0; 367 } 368 } 369 ret = 0; 370 if (wroteit == 0) 371 ret = fprintf(to, "%s:*:%u:%s\n", group, gid, name); 372 (void) fclose(from); 373 if (fclose(to) == EOF || ret == -1) { 374 (void) unlink(f); 375 warn("can't create gid: short write to `%s'", f); 376 return 0; 377 } 378 if (rename(f, _PATH_GROUP) < 0) { 379 (void) unlink(f); 380 warn("can't create gid: can't rename `%s' to `%s'", f, 381 _PATH_GROUP); 382 return 0; 383 } 384 (void) chmod(_PATH_GROUP, st.st_mode & 07777); 385 syslog(LOG_INFO, "new group added: name=%s, gid=%d", group, gid); 386 return 1; 387 } 388 389 /* modify the group entry with name `group' to be newent */ 390 static int 391 modify_gid(char *group, char *newent) 392 { 393 struct stat st; 394 FILE *from; 395 FILE *to; 396 char buf[LINE_MAX]; 397 char f[MaxFileNameLen]; 398 char *colon; 399 int groupc; 400 int entc; 401 int fd; 402 int cc; 403 404 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 405 warn("can't modify gid for `%s': can't open `%s'", group, 406 _PATH_GROUP); 407 return 0; 408 } 409 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 410 warn("can't lock `%s'", _PATH_GROUP); 411 } 412 (void) fstat(fileno(from), &st); 413 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 414 if ((fd = mkstemp(f)) < 0) { 415 (void) fclose(from); 416 warn("can't modify gid: mkstemp failed"); 417 return 0; 418 } 419 if ((to = fdopen(fd, "w")) == NULL) { 420 (void) fclose(from); 421 (void) close(fd); 422 (void) unlink(f); 423 warn("can't modify gid: fdopen `%s' failed", f); 424 return 0; 425 } 426 groupc = strlen(group); 427 while (fgets(buf, sizeof(buf), from) != NULL) { 428 cc = strlen(buf); 429 if (buf[cc - 1] != '\n' && !feof(from)) { 430 while (fgetc(from) != '\n' && !feof(from)) 431 cc++; 432 warn("%s: line `%s' too long (%d bytes), skipping", 433 _PATH_GROUP, buf, cc); 434 continue; 435 } 436 if ((colon = strchr(buf, ':')) == NULL) { 437 warn("badly formed entry `%s'", buf); 438 continue; 439 } 440 entc = (int)(colon - buf); 441 if (entc == groupc && strncmp(group, buf, entc) == 0) { 442 if (newent == NULL) { 443 continue; 444 } else { 445 cc = strlcpy(buf, newent, sizeof(buf)); 446 if (cc >= sizeof(buf)) { 447 warnx("group `%s' entry too long", newent); 448 return (0); 449 } 450 } 451 } 452 if (fwrite(buf, cc, 1, to) != 1) { 453 (void) fclose(from); 454 (void) fclose(to); 455 (void) unlink(f); 456 warn("can't modify gid: short write to `%s'", f); 457 return 0; 458 } 459 } 460 (void) fclose(from); 461 if (fclose(to) == EOF) { 462 (void) unlink(f); 463 warn("can't modify gid: short write to `%s'", f); 464 return 0; 465 } 466 if (rename(f, _PATH_GROUP) < 0) { 467 (void) unlink(f); 468 warn("can't modify gid: can't rename `%s' to `%s'", f, _PATH_GROUP); 469 return 0; 470 } 471 (void) chmod(_PATH_GROUP, st.st_mode & 07777); 472 if (newent == NULL) { 473 syslog(LOG_INFO, "group deleted: name=%s", group); 474 } else { 475 syslog(LOG_INFO, "group information modified: name=%s", group); 476 } 477 return 1; 478 } 479 480 /* modify the group entries for all `groups', by adding `user' */ 481 static int 482 append_group(char *user, int ngroups, const char **groups) 483 { 484 struct group *grp; 485 struct stat st; 486 FILE *from; 487 FILE *to; 488 char buf[LINE_MAX]; 489 char f[MaxFileNameLen]; 490 char *colon; 491 int fd; 492 int cc; 493 int i; 494 int j; 495 496 for (i = 0 ; i < ngroups ; i++) { 497 if ((grp = getgrnam(groups[i])) == NULL) { 498 warnx("can't append group `%s' for user `%s'", 499 groups[i], user); 500 } else { 501 for (j = 0 ; grp->gr_mem[j] ; j++) { 502 if (strcmp(user, grp->gr_mem[j]) == 0) { 503 /* already in it */ 504 groups[i] = ""; 505 } 506 } 507 } 508 } 509 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 510 warn("can't append group for `%s': can't open `%s'", user, 511 _PATH_GROUP); 512 return 0; 513 } 514 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 515 warn("can't lock `%s'", _PATH_GROUP); 516 } 517 (void) fstat(fileno(from), &st); 518 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 519 if ((fd = mkstemp(f)) < 0) { 520 (void) fclose(from); 521 warn("can't append group: mkstemp failed"); 522 return 0; 523 } 524 if ((to = fdopen(fd, "w")) == NULL) { 525 (void) fclose(from); 526 (void) close(fd); 527 (void) unlink(f); 528 warn("can't append group: fdopen `%s' failed", f); 529 return 0; 530 } 531 while (fgets(buf, sizeof(buf), from) != NULL) { 532 cc = strlen(buf); 533 if (buf[cc - 1] != '\n' && !feof(from)) { 534 while (fgetc(from) != '\n' && !feof(from)) 535 cc++; 536 warn("%s: line `%s' too long (%d bytes), skipping", 537 _PATH_GROUP, buf, cc); 538 continue; 539 } 540 if ((colon = strchr(buf, ':')) == NULL) { 541 warnx("badly formed entry `%s'", buf); 542 continue; 543 } 544 for (i = 0 ; i < ngroups ; i++) { 545 j = (int)(colon - buf); 546 if (strncmp(groups[i], buf, j) == 0 && 547 groups[i][j] == '\0') { 548 while (isspace(buf[cc - 1])) 549 cc--; 550 buf[(j = cc)] = '\0'; 551 if (buf[strlen(buf) - 1] != ':') 552 strlcat(buf, ",", sizeof(buf)); 553 cc = strlcat(buf, user, sizeof(buf)) + 1; 554 if (cc >= sizeof(buf)) { 555 warnx("Warning: group `%s' would " 556 "become too long, not modifying", 557 groups[i]); 558 cc = j + 1; 559 } 560 buf[cc - 1] = '\n'; 561 buf[cc] = '\0'; 562 } 563 } 564 if (fwrite(buf, cc, 1, to) != 1) { 565 (void) fclose(from); 566 (void) fclose(to); 567 (void) unlink(f); 568 warn("can't append group: short write to `%s'", f); 569 return 0; 570 } 571 } 572 (void) fclose(from); 573 if (fclose(to) == EOF) { 574 (void) unlink(f); 575 warn("can't append group: short write to `%s'", f); 576 return 0; 577 } 578 if (rename(f, _PATH_GROUP) < 0) { 579 (void) unlink(f); 580 warn("can't append group: can't rename `%s' to `%s'", f, _PATH_GROUP); 581 return 0; 582 } 583 (void) chmod(_PATH_GROUP, st.st_mode & 07777); 584 return 1; 585 } 586 587 /* return 1 if `login' is a valid login name */ 588 static int 589 valid_login(char *login_name) 590 { 591 unsigned char *cp; 592 593 /* The first character cannot be a hyphen */ 594 if (*login_name == '-') 595 return 0; 596 597 for (cp = login_name ; *cp ; cp++) { 598 /* We allow '$' as the last character for samba */ 599 if (!isalnum(*cp) && *cp != '.' && *cp != '_' && *cp != '-' && 600 !(*cp == '$' && *(cp + 1) == '\0')) { 601 return 0; 602 } 603 } 604 if ((char *)cp - login_name > MaxUserNameLen) 605 return 0; 606 return 1; 607 } 608 609 /* return 1 if `group' is a valid group name */ 610 static int 611 valid_group(char *group) 612 { 613 unsigned char *cp; 614 615 for (cp = group ; *cp ; cp++) { 616 if (!isalnum(*cp) && *cp != '.' && *cp != '_' && *cp != '-') { 617 return 0; 618 } 619 } 620 if ((char *)cp - group > MaxUserNameLen) 621 return 0; 622 return 1; 623 } 624 625 #ifdef EXTENSIONS 626 /* return 1 if `class' exists */ 627 static int 628 valid_class(char *class) 629 { 630 login_cap_t *lc; 631 632 if ((lc = login_getclass(class)) != NULL) 633 login_close(lc); 634 return lc != NULL; 635 } 636 #endif 637 638 /* find the next gid in the range lo .. hi */ 639 static int 640 getnextgid(uid_t *gidp, uid_t lo, uid_t hi) 641 { 642 for (*gidp = lo ; *gidp < hi ; *gidp += 1) { 643 if (getgrgid((gid_t)*gidp) == NULL) { 644 return 1; 645 } 646 } 647 return 0; 648 } 649 650 #ifdef EXTENSIONS 651 /* save a range of uids */ 652 static int 653 save_range(user_t *up, char *cp) 654 { 655 int from; 656 int to; 657 int i; 658 659 if (up->u_rsize == 0) { 660 up->u_rsize = 32; 661 NEWARRAY(range_t, up->u_rv, up->u_rsize, return(0)); 662 } else if (up->u_rc == up->u_rsize) { 663 up->u_rsize *= 2; 664 RENEW(range_t, up->u_rv, up->u_rsize, return(0)); 665 } 666 if (up->u_rv && sscanf(cp, "%d..%d", &from, &to) == 2) { 667 for (i = up->u_defrc ; i < up->u_rc ; i++) { 668 if (up->u_rv[i].r_from == from && up->u_rv[i].r_to == to) { 669 break; 670 } 671 } 672 if (i == up->u_rc) { 673 up->u_rv[up->u_rc].r_from = from; 674 up->u_rv[up->u_rc].r_to = to; 675 up->u_rc += 1; 676 } 677 } else { 678 warnx("Bad range `%s'", cp); 679 return 0; 680 } 681 return 1; 682 } 683 #endif 684 685 /* set the defaults in the defaults file */ 686 static int 687 setdefaults(user_t *up) 688 { 689 char template[MaxFileNameLen]; 690 FILE *fp; 691 int ret; 692 int fd; 693 #ifdef EXTENSIONS 694 int i; 695 #endif 696 697 (void) snprintf(template, sizeof(template), "%s.XXXXXXXX", CONFFILE); 698 if ((fd = mkstemp(template)) < 0) { 699 warnx("can't mkstemp `%s' for writing", CONFFILE); 700 return 0; 701 } 702 if ((fp = fdopen(fd, "w")) == NULL) { 703 warn("can't fdopen `%s' for writing", CONFFILE); 704 return 0; 705 } 706 ret = 1; 707 if (fprintf(fp, "group\t\t%s\n", up->u_primgrp) <= 0 || 708 fprintf(fp, "base_dir\t%s\n", up->u_basedir) <= 0 || 709 fprintf(fp, "skel_dir\t%s\n", up->u_skeldir) <= 0 || 710 fprintf(fp, "shell\t\t%s\n", up->u_shell) <= 0 || 711 #ifdef EXTENSIONS 712 fprintf(fp, "class\t\t%s\n", up->u_class) <= 0 || 713 #endif 714 fprintf(fp, "inactive\t%s\n", (up->u_inactive == NULL) ? UNSET_INACTIVE : up->u_inactive) <= 0 || 715 fprintf(fp, "expire\t\t%s\n", (up->u_expire == NULL) ? UNSET_EXPIRY : up->u_expire) <= 0 || 716 fprintf(fp, "preserve\t%s\n", (up->u_preserve == 0) ? "false" : "true") <= 0) { 717 warn("can't write to `%s'", CONFFILE); 718 ret = 0; 719 } 720 #ifdef EXTENSIONS 721 for (i = (up->u_defrc != up->u_rc) ? up->u_defrc : 0 ; i < up->u_rc ; i++) { 722 if (fprintf(fp, "range\t\t%d..%d\n", up->u_rv[i].r_from, up->u_rv[i].r_to) <= 0) { 723 warn("can't write to `%s'", CONFFILE); 724 ret = 0; 725 } 726 } 727 #endif 728 if (fclose(fp) == EOF) { 729 warn("can't write to `%s'", CONFFILE); 730 ret = 0; 731 } 732 if (ret) { 733 ret = ((rename(template, CONFFILE) == 0) && (chmod(CONFFILE, 0644) == 0)); 734 } 735 return ret; 736 } 737 738 /* read the defaults file */ 739 static void 740 read_defaults(user_t *up) 741 { 742 struct stat st; 743 size_t lineno; 744 size_t len; 745 FILE *fp; 746 unsigned char *cp; 747 unsigned char *s; 748 749 memsave(&up->u_primgrp, DEF_GROUP, strlen(DEF_GROUP)); 750 memsave(&up->u_basedir, DEF_BASEDIR, strlen(DEF_BASEDIR)); 751 memsave(&up->u_skeldir, DEF_SKELDIR, strlen(DEF_SKELDIR)); 752 memsave(&up->u_shell, DEF_SHELL, strlen(DEF_SHELL)); 753 memsave(&up->u_comment, DEF_COMMENT, strlen(DEF_COMMENT)); 754 #ifdef EXTENSIONS 755 memsave(&up->u_class, DEF_CLASS, strlen(DEF_CLASS)); 756 #endif 757 up->u_rsize = 16; 758 up->u_defrc = 0; 759 NEWARRAY(range_t, up->u_rv, up->u_rsize, exit(1)); 760 up->u_inactive = DEF_INACTIVE; 761 up->u_expire = DEF_EXPIRE; 762 if ((fp = fopen(CONFFILE, "r")) == NULL) { 763 if (stat(CONFFILE, &st) < 0 && !setdefaults(up)) { 764 warn("can't create `%s' defaults file", CONFFILE); 765 } 766 fp = fopen(CONFFILE, "r"); 767 } 768 if (fp != NULL) { 769 while ((s = fparseln(fp, &len, &lineno, NULL, 0)) != NULL) { 770 if (strncmp(s, "group", 5) == 0) { 771 for (cp = s + 5 ; isspace(*cp) ; cp++) { 772 } 773 memsave(&up->u_primgrp, cp, strlen(cp)); 774 } else if (strncmp(s, "base_dir", 8) == 0) { 775 for (cp = s + 8 ; isspace(*cp) ; cp++) { 776 } 777 memsave(&up->u_basedir, cp, strlen(cp)); 778 } else if (strncmp(s, "skel_dir", 8) == 0) { 779 for (cp = s + 8 ; isspace(*cp) ; cp++) { 780 } 781 memsave(&up->u_skeldir, cp, strlen(cp)); 782 } else if (strncmp(s, "shell", 5) == 0) { 783 for (cp = s + 5 ; isspace(*cp) ; cp++) { 784 } 785 memsave(&up->u_shell, cp, strlen(cp)); 786 } else if (strncmp(s, "password", 8) == 0) { 787 for (cp = s + 8 ; isspace(*cp) ; cp++) { 788 } 789 memsave(&up->u_password, cp, strlen(cp)); 790 #ifdef EXTENSIONS 791 } else if (strncmp(s, "class", 5) == 0) { 792 for (cp = s + 5 ; isspace(*cp) ; cp++) { 793 } 794 memsave(&up->u_class, cp, strlen(cp)); 795 #endif 796 } else if (strncmp(s, "inactive", 8) == 0) { 797 for (cp = s + 8 ; isspace(*cp) ; cp++) { 798 } 799 if (strcmp(cp, UNSET_INACTIVE) == 0) { 800 if (up->u_inactive) { 801 FREE(up->u_inactive); 802 } 803 up->u_inactive = NULL; 804 } else { 805 memsave(&up->u_inactive, cp, strlen(cp)); 806 } 807 #ifdef EXTENSIONS 808 } else if (strncmp(s, "range", 5) == 0) { 809 for (cp = s + 5 ; isspace(*cp) ; cp++) { 810 } 811 (void) save_range(up, cp); 812 #endif 813 #ifdef EXTENSIONS 814 } else if (strncmp(s, "preserve", 8) == 0) { 815 for (cp = s + 8 ; isspace(*cp) ; cp++) { 816 } 817 up->u_preserve = (strncmp(cp, "true", 4) == 0) ? 1 : 818 (strncmp(cp, "yes", 3) == 0) ? 1 : 819 atoi(cp); 820 #endif 821 } else if (strncmp(s, "expire", 6) == 0) { 822 for (cp = s + 6 ; isspace(*cp) ; cp++) { 823 } 824 if (strcmp(cp, UNSET_EXPIRY) == 0) { 825 if (up->u_expire) { 826 FREE(up->u_expire); 827 } 828 up->u_expire = NULL; 829 } else { 830 memsave(&up->u_expire, cp, strlen(cp)); 831 } 832 } 833 (void) free(s); 834 } 835 (void) fclose(fp); 836 } 837 if (up->u_rc == 0) { 838 up->u_rv[up->u_rc].r_from = DEF_LOWUID; 839 up->u_rv[up->u_rc].r_to = DEF_HIGHUID; 840 up->u_rc += 1; 841 } 842 up->u_defrc = up->u_rc; 843 } 844 845 /* return the next valid unused uid */ 846 static int 847 getnextuid(int sync_uid_gid, uid_t *uid, uid_t low_uid, uid_t high_uid) 848 { 849 for (*uid = low_uid ; *uid <= high_uid ; (*uid)++) { 850 if (getpwuid((uid_t)(*uid)) == NULL && *uid != NOBODY_UID) { 851 if (sync_uid_gid) { 852 if (getgrgid((gid_t)(*uid)) == NULL) { 853 return 1; 854 } 855 } else { 856 return 1; 857 } 858 } 859 } 860 return 0; 861 } 862 863 /* structure which defines a password type */ 864 typedef struct passwd_type_t { 865 const char *type; /* optional type descriptor */ 866 int desc_length; /* length of type descriptor */ 867 int length; /* length of password */ 868 } passwd_type_t; 869 870 #define BLF "$2a" 871 #define MD5 "$1" 872 #define DES "" 873 874 static passwd_type_t passwd_types[] = { 875 { BLF, 3, 54 }, /* Blowfish */ 876 { MD5, 2, 34 }, /* MD5 */ 877 { DES, 0, DES_Len }, /* standard DES */ 878 { NULL, -1, -1 } /* none - terminate search */ 879 }; 880 881 /* return non-zero if it's a valid password - check length for cipher type */ 882 static int 883 valid_password_length(char *newpasswd) 884 { 885 passwd_type_t *pwtp; 886 887 for (pwtp = passwd_types ; pwtp->desc_length >= 0 ; pwtp++) { 888 if (strncmp(newpasswd, pwtp->type, pwtp->desc_length) == 0) { 889 char *p; 890 891 if (strcmp(pwtp->type, BLF) != 0) { 892 return strlen(newpasswd) == pwtp->length; 893 } 894 /* Skip first three `$'. */ 895 if ((p = strchr(newpasswd, '$')) == NULL || 896 *(++p) == '$' || (p = strchr(p, '$')) == NULL || 897 *(++p) == '$' || (p = strchr(p, '$')) == NULL) 898 continue; 899 return (strlen(p) - 1); 900 } 901 } 902 return 0; 903 } 904 905 /* look for a valid time, return 0 if it was specified but bad */ 906 static int 907 scantime(time_t *tp, char *s) 908 { 909 struct tm tm; 910 911 *tp = 0; 912 if (s != NULL) { 913 (void) memset(&tm, 0, sizeof(tm)); 914 if (strptime(s, "%c", &tm) != NULL) { 915 *tp = mktime(&tm); 916 } else if (strptime(s, "%B %d %Y", &tm) != NULL) { 917 *tp = mktime(&tm); 918 } else if (isdigit((unsigned char) s[0]) != NULL) { 919 *tp = atoi(s); 920 } else { 921 return 0; 922 } 923 } 924 return 1; 925 } 926 927 /* compute the extra length '&' expansion consumes */ 928 static size_t 929 expand_len(const char *p, const char *username) 930 { 931 size_t alen; 932 size_t ulen; 933 934 ulen = strlen(username); 935 for (alen = 0; *p != '\0'; p++) 936 if (*p == '&') 937 alen += ulen - 1; 938 return alen; 939 } 940 941 /* add a user */ 942 static int 943 adduser(char *login_name, user_t *up) 944 { 945 struct group *grp; 946 struct stat st; 947 time_t expire; 948 time_t inactive; 949 char password[PasswordLength + 1]; 950 char home[MaxFileNameLen]; 951 char buf[LINE_MAX]; 952 int sync_uid_gid; 953 int masterfd; 954 int ptmpfd; 955 gid_t gid; 956 int cc; 957 int i, yp = 0; 958 FILE *fp; 959 960 if (!valid_login(login_name)) { 961 errx(EXIT_FAILURE, "`%s' is not a valid login name", login_name); 962 } 963 #ifdef EXTENSIONS 964 if (!valid_class(up->u_class)) { 965 errx(EXIT_FAILURE, "No such login class `%s'", up->u_class); 966 } 967 #endif 968 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 969 err(EXIT_FAILURE, "can't open `%s'", _PATH_MASTERPASSWD); 970 } 971 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 972 err(EXIT_FAILURE, "can't lock `%s'", _PATH_MASTERPASSWD); 973 } 974 pw_init(); 975 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 976 (void) close(masterfd); 977 err(EXIT_FAILURE, "can't obtain pw_lock"); 978 } 979 if ((fp = fdopen(masterfd, "r")) == NULL) { 980 (void) close(masterfd); 981 (void) close(ptmpfd); 982 pw_abort(); 983 err(EXIT_FAILURE, "can't fdopen `%s' for reading", 984 _PATH_MASTERPASSWD); 985 } 986 while (fgets(buf, sizeof(buf), fp) != NULL) { 987 cc = strlen(buf); 988 if (cc > 1 && buf[0] == '+' && buf[1] == ':') { 989 yp = 1; 990 continue; 991 } 992 if (write(ptmpfd, buf, (size_t)(cc)) != cc) { 993 (void) fclose(fp); 994 (void) close(ptmpfd); 995 pw_abort(); 996 err(EXIT_FAILURE, "short write to /etc/ptmp (not %d chars)", cc); 997 } 998 } 999 if (ferror(fp)) { 1000 (void) fclose(fp); 1001 (void) close(ptmpfd); 1002 pw_abort(); 1003 err(EXIT_FAILURE, "read error on %s", _PATH_MASTERPASSWD); 1004 } 1005 /* if no uid was specified, get next one in [low_uid..high_uid] range */ 1006 sync_uid_gid = (strcmp(up->u_primgrp, "=uid") == 0); 1007 if (up->u_uid == UID_MAX) { 1008 int got_id = 0; 1009 1010 /* 1011 * Look for a free UID in the command line ranges (if any). 1012 * These start after the ranges specified in the config file. 1013 */ 1014 for (i = up->u_defrc; got_id == 0 && i < up->u_rc ; i++) { 1015 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1016 up->u_rv[i].r_from, up->u_rv[i].r_to); 1017 } 1018 /* 1019 * If there were no free UIDs in the command line ranges, 1020 * try the ranges from the config file (there will always 1021 * be at least one default). 1022 */ 1023 if (got_id == 0) { 1024 for (i = 0; got_id == 0 && i < up->u_defrc; i++) { 1025 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1026 up->u_rv[i].r_from, up->u_rv[i].r_to); 1027 } 1028 } 1029 if (got_id == 0) { 1030 (void) close(ptmpfd); 1031 pw_abort(); 1032 errx(EXIT_FAILURE, "can't get next uid for %u", up->u_uid); 1033 } 1034 } 1035 /* check uid isn't already allocated */ 1036 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1037 (void) close(ptmpfd); 1038 pw_abort(); 1039 errx(EXIT_FAILURE, "uid %u is already in use", up->u_uid); 1040 } 1041 /* if -g=uid was specified, check gid is unused */ 1042 if (sync_uid_gid) { 1043 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1044 (void) close(ptmpfd); 1045 pw_abort(); 1046 errx(EXIT_FAILURE, "gid %u is already in use", up->u_uid); 1047 } 1048 gid = up->u_uid; 1049 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1050 gid = grp->gr_gid; 1051 } else if (is_number(up->u_primgrp) && 1052 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1053 gid = grp->gr_gid; 1054 } else { 1055 (void) close(ptmpfd); 1056 pw_abort(); 1057 errx(EXIT_FAILURE, "group %s not found", up->u_primgrp); 1058 } 1059 /* check name isn't already in use */ 1060 if (!(up->u_flags & F_DUPUID) && getpwnam(login_name) != NULL) { 1061 (void) close(ptmpfd); 1062 pw_abort(); 1063 errx(EXIT_FAILURE, "already a `%s' user", login_name); 1064 } 1065 if (up->u_flags & F_HOMEDIR) { 1066 if (strlcpy(home, up->u_home, sizeof(home)) >= sizeof(home)) { 1067 (void) close(ptmpfd); 1068 pw_abort(); 1069 errx(EXIT_FAILURE, "home directory `%s' too long", 1070 up->u_home); 1071 } 1072 } else { 1073 /* if home directory hasn't been given, make it up */ 1074 if (snprintf(home, sizeof(home), "%s/%s", up->u_basedir, 1075 login_name) >= sizeof(home)) { 1076 (void) close(ptmpfd); 1077 pw_abort(); 1078 errx(EXIT_FAILURE, "home directory `%s/%s' too long", 1079 up->u_basedir, login_name); 1080 } 1081 } 1082 if (!scantime(&inactive, up->u_inactive)) { 1083 warnx("Warning: inactive time `%s' invalid, password expiry off", 1084 up->u_inactive); 1085 } 1086 if (!scantime(&expire, up->u_expire)) { 1087 warnx("Warning: expire time `%s' invalid, account expiry off", 1088 up->u_expire); 1089 } 1090 if (lstat(home, &st) < 0 && !(up->u_flags & F_MKDIR) && 1091 strcmp(home, _PATH_NONEXISTENT) != 0) { 1092 warnx("Warning: home directory `%s' doesn't exist, and -m was" 1093 " not specified", home); 1094 } 1095 if (up->u_password != NULL && valid_password_length(up->u_password)) { 1096 (void) strlcpy(password, up->u_password, sizeof(password)); 1097 } else { 1098 (void) memset(password, '*', DES_Len); 1099 password[DES_Len] = 0; 1100 if (up->u_password != NULL) { 1101 warnx("Password `%s' is invalid: setting it to `%s'", 1102 up->u_password, password); 1103 } 1104 } 1105 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1106 login_name, 1107 password, 1108 up->u_uid, 1109 gid, 1110 #ifdef EXTENSIONS 1111 up->u_class, 1112 #else 1113 "", 1114 #endif 1115 (long) inactive, 1116 (long) expire, 1117 up->u_comment, 1118 home, 1119 up->u_shell); 1120 if (cc >= sizeof(buf) || cc < 0 || 1121 cc + expand_len(up->u_comment, login_name) >= 1023) { 1122 (void) close(ptmpfd); 1123 pw_abort(); 1124 errx(EXIT_FAILURE, "can't add `%s', line too long", buf); 1125 } 1126 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1127 (void) close(ptmpfd); 1128 pw_abort(); 1129 err(EXIT_FAILURE, "can't add `%s'", buf); 1130 } 1131 if (yp) { 1132 cc = snprintf(buf, sizeof(buf), "+:*::::::::\n"); 1133 if (cc == -1 || cc >= sizeof(buf)) { 1134 (void) close(ptmpfd); 1135 pw_abort(); 1136 errx(EXIT_FAILURE, "can't add `%s', line too long", buf); 1137 } 1138 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1139 (void) close(ptmpfd); 1140 pw_abort(); 1141 err(EXIT_FAILURE, "can't add `%s'", buf); 1142 } 1143 } 1144 if (up->u_flags & F_MKDIR) { 1145 if (lstat(home, &st) == 0) { 1146 (void) close(ptmpfd); 1147 pw_abort(); 1148 errx(EXIT_FAILURE, "home directory `%s' already exists", 1149 home); 1150 } else { 1151 if (asystem("%s -p %s", MKDIR, home) != 0) { 1152 (void) close(ptmpfd); 1153 pw_abort(); 1154 err(EXIT_FAILURE, "can't mkdir `%s'", home); 1155 } 1156 (void) copydotfiles(up->u_skeldir, up->u_uid, gid, home); 1157 } 1158 } 1159 if (strcmp(up->u_primgrp, "=uid") == 0 && 1160 getgrnam(login_name) == NULL && 1161 !creategid(login_name, gid, login_name)) { 1162 (void) close(ptmpfd); 1163 pw_abort(); 1164 errx(EXIT_FAILURE, "can't create gid %d for login name %s", 1165 gid, login_name); 1166 } 1167 if (up->u_groupc > 0 && !append_group(login_name, up->u_groupc, up->u_groupv)) { 1168 (void) close(ptmpfd); 1169 pw_abort(); 1170 errx(EXIT_FAILURE, "can't append `%s' to new groups", login_name); 1171 } 1172 (void) close(ptmpfd); 1173 if (pw_mkdb(yp ? NULL : login_name, 0) < 0) { 1174 pw_abort(); 1175 err(EXIT_FAILURE, "pw_mkdb failed"); 1176 } 1177 syslog(LOG_INFO, "new user added: name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1178 login_name, up->u_uid, gid, home, up->u_shell); 1179 return 1; 1180 } 1181 1182 /* remove a user from the groups file */ 1183 static int 1184 rm_user_from_groups(char *login_name) 1185 { 1186 struct stat st; 1187 size_t login_len; 1188 FILE *from; 1189 FILE *to; 1190 char buf[LINE_MAX]; 1191 char f[MaxFileNameLen]; 1192 char *cp, *ep; 1193 int fd; 1194 int cc; 1195 1196 login_len = strlen(login_name); 1197 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 1198 warn("can't remove gid for `%s': can't open `%s'", 1199 login_name, _PATH_GROUP); 1200 return 0; 1201 } 1202 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 1203 warn("can't lock `%s'", _PATH_GROUP); 1204 } 1205 (void) fstat(fileno(from), &st); 1206 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 1207 if ((fd = mkstemp(f)) < 0) { 1208 (void) fclose(from); 1209 warn("can't remove gid for `%s': mkstemp failed", login_name); 1210 return 0; 1211 } 1212 if ((to = fdopen(fd, "w")) == NULL) { 1213 (void) fclose(from); 1214 (void) close(fd); 1215 (void) unlink(f); 1216 warn("can't remove gid for `%s': fdopen `%s' failed", 1217 login_name, f); 1218 return 0; 1219 } 1220 while (fgets(buf, sizeof(buf), from) > 0) { 1221 cc = strlen(buf); 1222 if (buf[cc - 1] != '\n' && !feof(from)) { 1223 while (fgetc(from) != '\n' && !feof(from)) 1224 cc++; 1225 warn("%s: line `%s' too long (%d bytes), skipping", 1226 _PATH_GROUP, buf, cc); 1227 continue; 1228 } 1229 1230 /* Break out the group list. */ 1231 for (cp = buf, cc = 0; *cp != '\0' && cc < 3; cp++) { 1232 if (*cp == ':') 1233 cc++; 1234 } 1235 if (cc != 3) { 1236 warnx("Malformed entry `%.*s'. Skipping", 1237 (int)strlen(buf) - 1, buf); 1238 continue; 1239 } 1240 while ((cp = strstr(cp, login_name)) != NULL) { 1241 if ((cp[-1] == ':' || cp[-1] == ',') && 1242 (cp[login_len] == ',' || cp[login_len] == '\n')) { 1243 ep = cp + login_len; 1244 if (cp[login_len] == ',') 1245 ep++; 1246 else if (cp[-1] == ',') 1247 cp--; 1248 memmove(cp, ep, strlen(ep) + 1); 1249 } else { 1250 if ((cp = strchr(cp, ',')) == NULL) 1251 break; 1252 cp++; 1253 } 1254 } 1255 if (fwrite(buf, strlen(buf), 1, to) != 1) { 1256 (void) fclose(from); 1257 (void) fclose(to); 1258 (void) unlink(f); 1259 warn("can't remove gid for `%s': short write to `%s'", 1260 login_name, f); 1261 return 0; 1262 } 1263 } 1264 (void) fchmod(fileno(to), st.st_mode & 07777); 1265 (void) fclose(from); 1266 if (fclose(to) == EOF) { 1267 (void) unlink(f); 1268 warn("can't remove gid for `%s': short write to `%s'", 1269 login_name, f); 1270 return 0; 1271 } 1272 if (rename(f, _PATH_GROUP) < 0) { 1273 (void) unlink(f); 1274 warn("can't remove gid for `%s': can't rename `%s' to `%s'", 1275 login_name, f, _PATH_GROUP); 1276 return 0; 1277 } 1278 return 1; 1279 } 1280 1281 /* check that the user or group is local, not from YP/NIS */ 1282 static int 1283 is_local(char *name, const char *file) 1284 { 1285 FILE *fp; 1286 char buf[LINE_MAX]; 1287 size_t len; 1288 int ret; 1289 int cc; 1290 1291 if ((fp = fopen(file, "r")) == NULL) { 1292 err(EXIT_FAILURE, "can't open `%s'", file); 1293 } 1294 len = strlen(name); 1295 for (ret = 0 ; fgets(buf, sizeof(buf), fp) != NULL ; ) { 1296 cc = strlen(buf); 1297 if (buf[cc - 1] != '\n' && !feof(fp)) { 1298 while (fgetc(fp) != '\n' && !feof(fp)) 1299 cc++; 1300 warn("%s: line `%s' too long (%d bytes), skipping", 1301 file, buf, cc); 1302 continue; 1303 } 1304 if (strncmp(buf, name, len) == 0 && buf[len] == ':') { 1305 ret = 1; 1306 break; 1307 } 1308 } 1309 (void) fclose(fp); 1310 return ret; 1311 } 1312 1313 /* modify a user */ 1314 static int 1315 moduser(char *login_name, char *newlogin, user_t *up) 1316 { 1317 struct passwd *pwp; 1318 struct group *grp; 1319 const char *homedir; 1320 char buf[LINE_MAX]; 1321 size_t colonc, loginc; 1322 size_t cc; 1323 FILE *master; 1324 char newdir[MaxFileNameLen]; 1325 char *colon; 1326 int len; 1327 int masterfd; 1328 int ptmpfd; 1329 int rval; 1330 1331 if (!valid_login(newlogin)) { 1332 errx(EXIT_FAILURE, "`%s' is not a valid login name", login_name); 1333 } 1334 if ((pwp = getpwnam(login_name)) == NULL) { 1335 errx(EXIT_FAILURE, "No such user `%s'", login_name); 1336 } 1337 if (!is_local(login_name, _PATH_MASTERPASSWD)) { 1338 errx(EXIT_FAILURE, "User `%s' must be a local user", login_name); 1339 } 1340 /* keep dir name in case we need it for '-m' */ 1341 homedir = pwp->pw_dir; 1342 1343 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1344 err(EXIT_FAILURE, "can't open `%s'", _PATH_MASTERPASSWD); 1345 } 1346 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1347 err(EXIT_FAILURE, "can't lock `%s'", _PATH_MASTERPASSWD); 1348 } 1349 pw_init(); 1350 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1351 (void) close(masterfd); 1352 err(EXIT_FAILURE, "can't obtain pw_lock"); 1353 } 1354 if ((master = fdopen(masterfd, "r")) == NULL) { 1355 (void) close(masterfd); 1356 (void) close(ptmpfd); 1357 pw_abort(); 1358 err(EXIT_FAILURE, "can't fdopen fd for %s", _PATH_MASTERPASSWD); 1359 } 1360 if (up != NULL) { 1361 if (up->u_flags & F_USERNAME) { 1362 /* if changing name, check new name isn't already in use */ 1363 if (strcmp(login_name, newlogin) != 0 && getpwnam(newlogin) != NULL) { 1364 (void) close(ptmpfd); 1365 pw_abort(); 1366 errx(EXIT_FAILURE, "already a `%s' user", newlogin); 1367 } 1368 pwp->pw_name = newlogin; 1369 1370 /* 1371 * Provide a new directory name in case the 1372 * home directory is to be moved. 1373 */ 1374 if (up->u_flags & F_MKDIR) { 1375 (void) snprintf(newdir, sizeof(newdir), 1376 "%s/%s", up->u_basedir, newlogin); 1377 pwp->pw_dir = newdir; 1378 } 1379 } 1380 if (up->u_flags & F_PASSWORD) { 1381 if (up->u_password != NULL) { 1382 if (!valid_password_length(up->u_password)) { 1383 (void) close(ptmpfd); 1384 pw_abort(); 1385 errx(EXIT_FAILURE, "Invalid password: `%s'", 1386 up->u_password); 1387 } 1388 pwp->pw_passwd = up->u_password; 1389 } 1390 } 1391 if (up->u_flags & F_UID) { 1392 /* check uid isn't already allocated */ 1393 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1394 (void) close(ptmpfd); 1395 pw_abort(); 1396 errx(EXIT_FAILURE, "uid %u is already in use", up->u_uid); 1397 } 1398 pwp->pw_uid = up->u_uid; 1399 } 1400 if (up->u_flags & F_GROUP) { 1401 /* if -g=uid was specified, check gid is unused */ 1402 if (strcmp(up->u_primgrp, "=uid") == 0) { 1403 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1404 (void) close(ptmpfd); 1405 pw_abort(); 1406 errx(EXIT_FAILURE, "gid %u is already in use", up->u_uid); 1407 } 1408 pwp->pw_gid = up->u_uid; 1409 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1410 pwp->pw_gid = grp->gr_gid; 1411 } else if (is_number(up->u_primgrp) && 1412 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1413 pwp->pw_gid = grp->gr_gid; 1414 } else { 1415 (void) close(ptmpfd); 1416 pw_abort(); 1417 errx(EXIT_FAILURE, "group %s not found", up->u_primgrp); 1418 } 1419 } 1420 if (up->u_flags & F_INACTIVE) { 1421 if (!scantime(&pwp->pw_change, up->u_inactive)) { 1422 warnx("Warning: inactive time `%s' invalid, password expiry off", 1423 up->u_inactive); 1424 } 1425 } 1426 if (up->u_flags & F_EXPIRE) { 1427 if (!scantime(&pwp->pw_expire, up->u_expire)) { 1428 warnx("Warning: expire time `%s' invalid, account expiry off", 1429 up->u_expire); 1430 } 1431 } 1432 if (up->u_flags & F_COMMENT) 1433 pwp->pw_gecos = up->u_comment; 1434 if (up->u_flags & F_HOMEDIR) 1435 pwp->pw_dir = up->u_home; 1436 if (up->u_flags & F_SHELL) 1437 pwp->pw_shell = up->u_shell; 1438 #ifdef EXTENSIONS 1439 if (up->u_flags & F_CLASS) { 1440 if (!valid_class(up->u_class)) { 1441 (void) close(ptmpfd); 1442 pw_abort(); 1443 errx(EXIT_FAILURE, 1444 "No such login class `%s'", up->u_class); 1445 } 1446 pwp->pw_class = up->u_class; 1447 } 1448 #endif 1449 } 1450 loginc = strlen(login_name); 1451 while (fgets(buf, sizeof(buf), master) != NULL) { 1452 if ((colon = strchr(buf, ':')) == NULL) { 1453 warnx("Malformed entry `%s'. Skipping", buf); 1454 continue; 1455 } 1456 colonc = (size_t)(colon - buf); 1457 if (strncmp(login_name, buf, loginc) == 0 && loginc == colonc) { 1458 if (up != NULL) { 1459 if ((len = snprintf(buf, sizeof(buf), 1460 "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1461 newlogin, 1462 pwp->pw_passwd, 1463 pwp->pw_uid, 1464 pwp->pw_gid, 1465 #ifdef EXTENSIONS 1466 pwp->pw_class, 1467 #else 1468 "", 1469 #endif 1470 (long)pwp->pw_change, 1471 (long)pwp->pw_expire, 1472 pwp->pw_gecos, 1473 pwp->pw_dir, 1474 pwp->pw_shell)) >= sizeof(buf) || len < 0 || 1475 len + expand_len(pwp->pw_gecos, newlogin) 1476 >= 1023) { 1477 (void) close(ptmpfd); 1478 pw_abort(); 1479 errx(EXIT_FAILURE, "can't add `%s', " 1480 "line too long (%d bytes)", buf, 1481 len + expand_len(pwp->pw_gecos, 1482 newlogin)); 1483 } 1484 if (write(ptmpfd, buf, len) != len) { 1485 (void) close(ptmpfd); 1486 pw_abort(); 1487 err(EXIT_FAILURE, "can't add `%s'", buf); 1488 } 1489 } 1490 } else { 1491 len = strlen(buf); 1492 if ((cc = write(ptmpfd, buf, len)) != len) { 1493 (void) close(masterfd); 1494 (void) close(ptmpfd); 1495 pw_abort(); 1496 err(EXIT_FAILURE, "short write to /etc/ptmp (%lld not %lld chars)", 1497 (long long)cc, (long long)len); 1498 } 1499 } 1500 } 1501 if (up != NULL) { 1502 if ((up->u_flags & F_MKDIR) && 1503 asystem("%s %s %s", MV, homedir, pwp->pw_dir) != 0) { 1504 (void) close(ptmpfd); 1505 pw_abort(); 1506 err(EXIT_FAILURE, "can't move `%s' to `%s'", 1507 homedir, pwp->pw_dir); 1508 } 1509 if (up->u_groupc > 0 && 1510 !append_group(newlogin, up->u_groupc, up->u_groupv)) { 1511 (void) close(ptmpfd); 1512 pw_abort(); 1513 errx(EXIT_FAILURE, "can't append `%s' to new groups", 1514 newlogin); 1515 } 1516 } 1517 (void) close(ptmpfd); 1518 if (up != NULL && strcmp(login_name, newlogin) == 0) 1519 rval = pw_mkdb(login_name, 0); 1520 else 1521 rval = pw_mkdb(NULL, 0); 1522 if (rval == -1) { 1523 pw_abort(); 1524 err(EXIT_FAILURE, "pw_mkdb failed"); 1525 } 1526 if (up == NULL) { 1527 syslog(LOG_INFO, "user removed: name=%s", login_name); 1528 } else if (strcmp(login_name, newlogin) == 0) { 1529 syslog(LOG_INFO, "user information modified: name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1530 login_name, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, pwp->pw_shell); 1531 } else { 1532 syslog(LOG_INFO, "user information modified: name=%s, new name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1533 login_name, newlogin, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, pwp->pw_shell); 1534 } 1535 return 1; 1536 } 1537 1538 1539 #ifdef EXTENSIONS 1540 /* see if we can find out the user struct */ 1541 static struct passwd * 1542 find_user_info(char *name) 1543 { 1544 struct passwd *pwp; 1545 1546 if ((pwp = getpwnam(name)) != NULL) { 1547 return pwp; 1548 } 1549 if (is_number(name) && (pwp = getpwuid((uid_t)atoi(name))) != NULL) { 1550 return pwp; 1551 } 1552 return NULL; 1553 } 1554 #endif 1555 1556 #ifdef EXTENSIONS 1557 /* see if we can find out the group struct */ 1558 static struct group * 1559 find_group_info(char *name) 1560 { 1561 struct group *grp; 1562 1563 if ((grp = getgrnam(name)) != NULL) { 1564 return grp; 1565 } 1566 if (is_number(name) && (grp = getgrgid((gid_t)atoi(name))) != NULL) { 1567 return grp; 1568 } 1569 return NULL; 1570 } 1571 #endif 1572 1573 /* print out usage message, and then exit */ 1574 void 1575 usermgmt_usage(const char *prog) 1576 { 1577 if (strcmp(prog, "useradd") == 0) { 1578 (void) fprintf(stderr, "usage: %s -D [-b basedir] [-e expiry] " 1579 "[-f changetime] [-g group]\n\t\t[-k skeletondir] " 1580 "[-r low..high] [-s shell] [-L class]\n", prog); 1581 (void) fprintf(stderr, "usage: %s [-mov] [-G group[,group,...]]" 1582 " [-b basedir] [-c comment]\n\t\t" 1583 "[-d homedir] [-e expiry] [-f changetime] [-g group]\n\t\t" 1584 "[-k skeletondir] [-p password] " 1585 "[-r lowuid..highuid]\n\t\t[-s shell] [-u uid] [-L class] " 1586 "user\n", prog); 1587 } else if (strcmp(prog, "usermod") == 0) { 1588 (void) fprintf(stderr, "usage: %s [-mov] [-G group[,group,...]]" 1589 " [-c comment] [-d homedir]\n\t\t" 1590 "[-e expire] [-f changetime] [-g group] [-l newname]\n\t\t" 1591 "[-p password] [-s shell] [-u uid] [-L class] user\n", 1592 prog); 1593 } else if (strcmp(prog, "userdel") == 0) { 1594 (void) fprintf(stderr, "usage: %s -D [-p preserve]\n", prog); 1595 (void) fprintf(stderr, "usage: %s [-prv] user\n", prog); 1596 #ifdef EXTENSIONS 1597 } else if (strcmp(prog, "userinfo") == 0) { 1598 (void) fprintf(stderr, "usage: %s [-ev] user\n", prog); 1599 #endif 1600 } else if (strcmp(prog, "groupadd") == 0) { 1601 (void) fprintf(stderr, "usage: %s [-ov] [-g gid] group\n", 1602 prog); 1603 } else if (strcmp(prog, "groupdel") == 0) { 1604 (void) fprintf(stderr, "usage: %s [-v] group\n", prog); 1605 } else if (strcmp(prog, "groupmod") == 0) { 1606 (void) fprintf(stderr, "usage: %s [-ov] [-g gid] [-n newname] " 1607 "group\n", prog); 1608 } else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) { 1609 (void) fprintf(stderr, "usage: %s [ add | del | mod " 1610 #ifdef EXTENSIONS 1611 "| info " 1612 #endif 1613 "] ...\n", 1614 prog); 1615 #ifdef EXTENSIONS 1616 } else if (strcmp(prog, "groupinfo") == 0) { 1617 (void) fprintf(stderr, "usage: %s [-ev] group\n", prog); 1618 #endif 1619 } else { 1620 (void) fprintf(stderr, "This program must be called as {user,group}{add,del,mod,info},\n%s is not an understood name.\n", prog); 1621 } 1622 exit(EXIT_FAILURE); 1623 /* NOTREACHED */ 1624 } 1625 1626 #ifdef EXTENSIONS 1627 #define ADD_OPT_EXTENSIONS "p:r:vL:" 1628 #else 1629 #define ADD_OPT_EXTENSIONS 1630 #endif 1631 1632 int 1633 useradd(int argc, char **argv) 1634 { 1635 user_t u; 1636 int defaultfield; 1637 int bigD; 1638 int c; 1639 #ifdef EXTENSIONS 1640 int i; 1641 #endif 1642 1643 (void) memset(&u, 0, sizeof(u)); 1644 read_defaults(&u); 1645 u.u_uid = UID_MAX; 1646 defaultfield = bigD = 0; 1647 while ((c = getopt(argc, argv, "DG:b:c:d:e:f:g:k:mou:s:" ADD_OPT_EXTENSIONS)) != -1) { 1648 switch(c) { 1649 case 'D': 1650 bigD = 1; 1651 break; 1652 case 'G': 1653 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1654 u.u_groupc < NGROUPS_MAX - 2) { 1655 if (u.u_groupv[u.u_groupc][0] != 0) { 1656 u.u_groupc++; 1657 } 1658 } 1659 if (optarg != NULL) { 1660 warnx("Truncated list of secondary groups to %d entries", NGROUPS_MAX - 2); 1661 } 1662 break; 1663 case 'b': 1664 defaultfield = 1; 1665 memsave(&u.u_basedir, optarg, strlen(optarg)); 1666 break; 1667 case 'c': 1668 memsave(&u.u_comment, optarg, strlen(optarg)); 1669 break; 1670 case 'd': 1671 memsave(&u.u_home, optarg, strlen(optarg)); 1672 u.u_flags |= F_HOMEDIR; 1673 break; 1674 case 'e': 1675 defaultfield = 1; 1676 memsave(&u.u_expire, optarg, strlen(optarg)); 1677 break; 1678 case 'f': 1679 defaultfield = 1; 1680 memsave(&u.u_inactive, optarg, strlen(optarg)); 1681 break; 1682 case 'g': 1683 defaultfield = 1; 1684 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1685 break; 1686 case 'k': 1687 defaultfield = 1; 1688 memsave(&u.u_skeldir, optarg, strlen(optarg)); 1689 break; 1690 #ifdef EXTENSIONS 1691 case 'L': 1692 defaultfield = 1; 1693 memsave(&u.u_class, optarg, strlen(optarg)); 1694 break; 1695 #endif 1696 case 'm': 1697 u.u_flags |= F_MKDIR; 1698 break; 1699 case 'o': 1700 u.u_flags |= F_DUPUID; 1701 break; 1702 #ifdef EXTENSIONS 1703 case 'p': 1704 memsave(&u.u_password, optarg, strlen(optarg)); 1705 memset(optarg, 'X', strlen(optarg)); 1706 break; 1707 #endif 1708 #ifdef EXTENSIONS 1709 case 'r': 1710 defaultfield = 1; 1711 (void) save_range(&u, optarg); 1712 break; 1713 #endif 1714 case 's': 1715 defaultfield = 1; 1716 memsave(&u.u_shell, optarg, strlen(optarg)); 1717 break; 1718 case 'u': 1719 if (!is_number(optarg)) { 1720 errx(EXIT_FAILURE, "When using [-u uid], the uid must be numeric"); 1721 } 1722 u.u_uid = atoi(optarg); 1723 break; 1724 #ifdef EXTENSIONS 1725 case 'v': 1726 verbose = 1; 1727 break; 1728 #endif 1729 default: 1730 usermgmt_usage("useradd"); 1731 /* NOTREACHED */ 1732 } 1733 } 1734 if (bigD) { 1735 if (defaultfield) { 1736 checkeuid(); 1737 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1738 } 1739 (void) printf("group\t\t%s\n", u.u_primgrp); 1740 (void) printf("base_dir\t%s\n", u.u_basedir); 1741 (void) printf("skel_dir\t%s\n", u.u_skeldir); 1742 (void) printf("shell\t\t%s\n", u.u_shell); 1743 #ifdef EXTENSIONS 1744 (void) printf("class\t\t%s\n", u.u_class); 1745 #endif 1746 (void) printf("inactive\t%s\n", (u.u_inactive == NULL) ? UNSET_INACTIVE : u.u_inactive); 1747 (void) printf("expire\t\t%s\n", (u.u_expire == NULL) ? UNSET_EXPIRY : u.u_expire); 1748 #ifdef EXTENSIONS 1749 for (i = 0 ; i < u.u_rc ; i++) { 1750 (void) printf("range\t\t%d..%d\n", u.u_rv[i].r_from, u.u_rv[i].r_to); 1751 } 1752 #endif 1753 return EXIT_SUCCESS; 1754 } 1755 argc -= optind; 1756 argv += optind; 1757 if (argc != 1) { 1758 usermgmt_usage("useradd"); 1759 } 1760 checkeuid(); 1761 openlog("useradd", LOG_PID, LOG_USER); 1762 return adduser(*argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1763 } 1764 1765 #ifdef EXTENSIONS 1766 #define MOD_OPT_EXTENSIONS "p:vL:" 1767 #else 1768 #define MOD_OPT_EXTENSIONS 1769 #endif 1770 1771 int 1772 usermod(int argc, char **argv) 1773 { 1774 user_t u; 1775 char newuser[MaxUserNameLen + 1]; 1776 int c, have_new_user; 1777 1778 (void) memset(&u, 0, sizeof(u)); 1779 (void) memset(newuser, 0, sizeof(newuser)); 1780 read_defaults(&u); 1781 free(u.u_primgrp); 1782 u.u_primgrp = NULL; 1783 have_new_user = 0; 1784 while ((c = getopt(argc, argv, "G:c:d:e:f:g:l:mos:u:" MOD_OPT_EXTENSIONS)) != -1) { 1785 switch(c) { 1786 case 'G': 1787 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1788 u.u_groupc < NGROUPS_MAX - 2) { 1789 if (u.u_groupv[u.u_groupc][0] != 0) { 1790 u.u_groupc++; 1791 } 1792 } 1793 if (optarg != NULL) { 1794 warnx("Truncated list of secondary groups to %d entries", NGROUPS_MAX - 2); 1795 } 1796 u.u_flags |= F_SECGROUP; 1797 break; 1798 case 'c': 1799 memsave(&u.u_comment, optarg, strlen(optarg)); 1800 u.u_flags |= F_COMMENT; 1801 break; 1802 case 'd': 1803 memsave(&u.u_home, optarg, strlen(optarg)); 1804 u.u_flags |= F_HOMEDIR; 1805 break; 1806 case 'e': 1807 memsave(&u.u_expire, optarg, strlen(optarg)); 1808 u.u_flags |= F_EXPIRE; 1809 break; 1810 case 'f': 1811 memsave(&u.u_inactive, optarg, strlen(optarg)); 1812 u.u_flags |= F_INACTIVE; 1813 break; 1814 case 'g': 1815 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1816 u.u_flags |= F_GROUP; 1817 break; 1818 case 'l': 1819 if (strlcpy(newuser, optarg, sizeof(newuser)) >= 1820 sizeof(newuser)) 1821 errx(EXIT_FAILURE, "username `%s' too long", 1822 optarg); 1823 have_new_user = 1; 1824 u.u_flags |= F_USERNAME; 1825 break; 1826 #ifdef EXTENSIONS 1827 case 'L': 1828 memsave(&u.u_class, optarg, strlen(optarg)); 1829 u.u_flags |= F_CLASS; 1830 break; 1831 #endif 1832 case 'm': 1833 u.u_flags |= F_MKDIR; 1834 break; 1835 case 'o': 1836 u.u_flags |= F_DUPUID; 1837 break; 1838 #ifdef EXTENSIONS 1839 case 'p': 1840 memsave(&u.u_password, optarg, strlen(optarg)); 1841 memset(optarg, 'X', strlen(optarg)); 1842 u.u_flags |= F_PASSWORD; 1843 break; 1844 #endif 1845 case 's': 1846 memsave(&u.u_shell, optarg, strlen(optarg)); 1847 u.u_flags |= F_SHELL; 1848 break; 1849 case 'u': 1850 if (!is_number(optarg)) { 1851 errx(EXIT_FAILURE, "When using [-u uid], the uid must be numeric"); 1852 } 1853 u.u_uid = atoi(optarg); 1854 u.u_flags |= F_UID; 1855 break; 1856 #ifdef EXTENSIONS 1857 case 'v': 1858 verbose = 1; 1859 break; 1860 #endif 1861 default: 1862 usermgmt_usage("usermod"); 1863 /* NOTREACHED */ 1864 } 1865 } 1866 if ((u.u_flags & F_MKDIR) && !(u.u_flags & F_HOMEDIR) && 1867 !(u.u_flags & F_USERNAME)) { 1868 warnx("option 'm' useless without 'd' or 'l' -- ignored"); 1869 u.u_flags &= ~F_MKDIR; 1870 } 1871 argc -= optind; 1872 argv += optind; 1873 if (argc != 1) { 1874 usermgmt_usage("usermod"); 1875 } 1876 checkeuid(); 1877 openlog("usermod", LOG_PID, LOG_USER); 1878 return moduser(*argv, (have_new_user) ? newuser : *argv, &u) ? 1879 EXIT_SUCCESS : EXIT_FAILURE; 1880 } 1881 1882 #ifdef EXTENSIONS 1883 #define DEL_OPT_EXTENSIONS "Dp:v" 1884 #else 1885 #define DEL_OPT_EXTENSIONS 1886 #endif 1887 1888 int 1889 userdel(int argc, char **argv) 1890 { 1891 struct passwd *pwp; 1892 user_t u; 1893 char password[PasswordLength + 1]; 1894 int defaultfield; 1895 int rmhome; 1896 int bigD; 1897 int c; 1898 1899 (void) memset(&u, 0, sizeof(u)); 1900 read_defaults(&u); 1901 defaultfield = bigD = rmhome = 0; 1902 while ((c = getopt(argc, argv, "r" DEL_OPT_EXTENSIONS)) != -1) { 1903 switch(c) { 1904 #ifdef EXTENSIONS 1905 case 'D': 1906 bigD = 1; 1907 break; 1908 #endif 1909 #ifdef EXTENSIONS 1910 case 'p': 1911 defaultfield = 1; 1912 u.u_preserve = (strcmp(optarg, "true") == 0) ? 1 : 1913 (strcmp(optarg, "yes") == 0) ? 1 : 1914 atoi(optarg); 1915 break; 1916 #endif 1917 case 'r': 1918 rmhome = 1; 1919 break; 1920 #ifdef EXTENSIONS 1921 case 'v': 1922 verbose = 1; 1923 break; 1924 #endif 1925 default: 1926 usermgmt_usage("userdel"); 1927 /* NOTREACHED */ 1928 } 1929 } 1930 #ifdef EXTENSIONS 1931 if (bigD) { 1932 if (defaultfield) { 1933 checkeuid(); 1934 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1935 } 1936 (void) printf("preserve\t%s\n", (u.u_preserve) ? "true" : "false"); 1937 return EXIT_SUCCESS; 1938 } 1939 #endif 1940 argc -= optind; 1941 argv += optind; 1942 if (argc != 1) { 1943 usermgmt_usage("userdel"); 1944 } 1945 checkeuid(); 1946 if ((pwp = getpwnam(*argv)) == NULL) { 1947 warnx("No such user `%s'", *argv); 1948 return EXIT_FAILURE; 1949 } 1950 if (rmhome) 1951 (void)removehomedir(pwp->pw_name, pwp->pw_uid, pwp->pw_dir); 1952 if (u.u_preserve) { 1953 u.u_flags |= F_SHELL; 1954 memsave(&u.u_shell, NOLOGIN, strlen(NOLOGIN)); 1955 (void) memset(password, '*', DES_Len); 1956 password[DES_Len] = 0; 1957 memsave(&u.u_password, password, strlen(password)); 1958 u.u_flags |= F_PASSWORD; 1959 openlog("userdel", LOG_PID, LOG_USER); 1960 return moduser(*argv, *argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1961 } 1962 if (!rm_user_from_groups(*argv)) { 1963 return 0; 1964 } 1965 openlog("userdel", LOG_PID, LOG_USER); 1966 return moduser(*argv, *argv, NULL) ? EXIT_SUCCESS : EXIT_FAILURE; 1967 } 1968 1969 #ifdef EXTENSIONS 1970 #define GROUP_ADD_OPT_EXTENSIONS "v" 1971 #else 1972 #define GROUP_ADD_OPT_EXTENSIONS 1973 #endif 1974 1975 /* add a group */ 1976 int 1977 groupadd(int argc, char **argv) 1978 { 1979 int dupgid; 1980 int gid; 1981 int c; 1982 1983 gid = GID_MAX; 1984 dupgid = 0; 1985 while ((c = getopt(argc, argv, "g:o" GROUP_ADD_OPT_EXTENSIONS)) != -1) { 1986 switch(c) { 1987 case 'g': 1988 if (!is_number(optarg)) { 1989 errx(EXIT_FAILURE, "When using [-g gid], the gid must be numeric"); 1990 } 1991 gid = atoi(optarg); 1992 break; 1993 case 'o': 1994 dupgid = 1; 1995 break; 1996 #ifdef EXTENSIONS 1997 case 'v': 1998 verbose = 1; 1999 break; 2000 #endif 2001 default: 2002 usermgmt_usage("groupadd"); 2003 /* NOTREACHED */ 2004 } 2005 } 2006 argc -= optind; 2007 argv += optind; 2008 if (argc != 1) { 2009 usermgmt_usage("groupadd"); 2010 } 2011 checkeuid(); 2012 if (!valid_group(*argv)) { 2013 errx(EXIT_FAILURE, "invalid group name `%s'", *argv); 2014 } 2015 if (gid < 0 && !getnextgid(&gid, LowGid, HighGid)) { 2016 errx(EXIT_FAILURE, "can't add group: can't get next gid"); 2017 } 2018 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 2019 errx(EXIT_FAILURE, "can't add group: gid %d is a duplicate", gid); 2020 } 2021 openlog("groupadd", LOG_PID, LOG_USER); 2022 if (!creategid(*argv, gid, "")) { 2023 errx(EXIT_FAILURE, "can't add group: problems with %s file", 2024 _PATH_GROUP); 2025 } 2026 return EXIT_SUCCESS; 2027 } 2028 2029 #ifdef EXTENSIONS 2030 #define GROUP_DEL_OPT_EXTENSIONS "v" 2031 #else 2032 #define GROUP_DEL_OPT_EXTENSIONS 2033 #endif 2034 2035 /* remove a group */ 2036 int 2037 groupdel(int argc, char **argv) 2038 { 2039 int c; 2040 2041 while ((c = getopt(argc, argv, "" GROUP_DEL_OPT_EXTENSIONS)) != -1) { 2042 switch(c) { 2043 #ifdef EXTENSIONS 2044 case 'v': 2045 verbose = 1; 2046 break; 2047 #endif 2048 default: 2049 usermgmt_usage("groupdel"); 2050 /* NOTREACHED */ 2051 } 2052 } 2053 argc -= optind; 2054 argv += optind; 2055 if (argc != 1) { 2056 usermgmt_usage("groupdel"); 2057 } 2058 checkeuid(); 2059 openlog("groupdel", LOG_PID, LOG_USER); 2060 if (getgrnam(*argv) == NULL) { 2061 warnx("No such group: `%s'", *argv); 2062 return EXIT_FAILURE; 2063 } 2064 if (!modify_gid(*argv, NULL)) { 2065 err(EXIT_FAILURE, "can't change %s file", _PATH_GROUP); 2066 } 2067 return EXIT_SUCCESS; 2068 } 2069 2070 #ifdef EXTENSIONS 2071 #define GROUP_MOD_OPT_EXTENSIONS "v" 2072 #else 2073 #define GROUP_MOD_OPT_EXTENSIONS 2074 #endif 2075 2076 /* modify a group */ 2077 int 2078 groupmod(int argc, char **argv) 2079 { 2080 struct group *grp; 2081 char buf[LINE_MAX]; 2082 char *newname; 2083 char **cpp; 2084 int dupgid; 2085 int gid; 2086 int cc; 2087 int c; 2088 2089 gid = GID_MAX; 2090 dupgid = 0; 2091 newname = NULL; 2092 while ((c = getopt(argc, argv, "g:on:" GROUP_MOD_OPT_EXTENSIONS)) != -1) { 2093 switch(c) { 2094 case 'g': 2095 if (!is_number(optarg)) { 2096 errx(EXIT_FAILURE, "When using [-g gid], the gid must be numeric"); 2097 } 2098 gid = atoi(optarg); 2099 break; 2100 case 'o': 2101 dupgid = 1; 2102 break; 2103 case 'n': 2104 memsave(&newname, optarg, strlen(optarg)); 2105 break; 2106 #ifdef EXTENSIONS 2107 case 'v': 2108 verbose = 1; 2109 break; 2110 #endif 2111 default: 2112 usermgmt_usage("groupmod"); 2113 /* NOTREACHED */ 2114 } 2115 } 2116 argc -= optind; 2117 argv += optind; 2118 if (argc != 1) { 2119 usermgmt_usage("groupmod"); 2120 } 2121 checkeuid(); 2122 if (gid < 0 && newname == NULL) { 2123 errx(EXIT_FAILURE, "Nothing to change"); 2124 } 2125 if (dupgid && gid < 0) { 2126 errx(EXIT_FAILURE, "Duplicate which gid?"); 2127 } 2128 if ((grp = getgrnam(*argv)) == NULL) { 2129 errx(EXIT_FAILURE, "can't find group `%s' to modify", *argv); 2130 } 2131 if (!is_local(*argv, _PATH_GROUP)) { 2132 errx(EXIT_FAILURE, "Group `%s' must be a local group", *argv); 2133 } 2134 if (newname != NULL && !valid_group(newname)) { 2135 errx(EXIT_FAILURE, "invalid group name `%s'", newname); 2136 } 2137 if ((cc = snprintf(buf, sizeof(buf), "%s:%s:%u:", 2138 (newname) ? newname : grp->gr_name, grp->gr_passwd, 2139 (gid < 0) ? grp->gr_gid : gid)) >= sizeof(buf) || cc < 0) 2140 errx(EXIT_FAILURE, "group `%s' entry too long", grp->gr_name); 2141 2142 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2143 cc = strlcat(buf, *cpp, sizeof(buf)) + 1; 2144 if (cc >= sizeof(buf)) 2145 errx(EXIT_FAILURE, "group `%s' entry too long", 2146 grp->gr_name); 2147 if (cpp[1] != NULL) { 2148 buf[cc - 1] = ','; 2149 buf[cc] = '\0'; 2150 } 2151 } 2152 cc = strlcat(buf, "\n", sizeof(buf)); 2153 if (cc >= sizeof(buf)) 2154 errx(EXIT_FAILURE, "group `%s' entry too long", grp->gr_name); 2155 2156 openlog("groupmod", LOG_PID, LOG_USER); 2157 if (!modify_gid(*argv, buf)) 2158 err(EXIT_FAILURE, "can't change %s file", _PATH_GROUP); 2159 return EXIT_SUCCESS; 2160 } 2161 2162 #ifdef EXTENSIONS 2163 /* display user information */ 2164 int 2165 userinfo(int argc, char **argv) 2166 { 2167 struct passwd *pwp; 2168 struct group *grp; 2169 char **cpp; 2170 int exists; 2171 int i; 2172 2173 exists = 0; 2174 while ((i = getopt(argc, argv, "ev")) != -1) { 2175 switch(i) { 2176 case 'e': 2177 exists = 1; 2178 break; 2179 case 'v': 2180 verbose = 1; 2181 break; 2182 default: 2183 usermgmt_usage("userinfo"); 2184 /* NOTREACHED */ 2185 } 2186 } 2187 argc -= optind; 2188 argv += optind; 2189 if (argc != 1) { 2190 usermgmt_usage("userinfo"); 2191 } 2192 pwp = find_user_info(*argv); 2193 if (exists) { 2194 exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE); 2195 } 2196 if (pwp == NULL) { 2197 errx(EXIT_FAILURE, "can't find user `%s'", *argv); 2198 } 2199 (void) printf("login\t%s\n", pwp->pw_name); 2200 (void) printf("passwd\t%s\n", pwp->pw_passwd); 2201 (void) printf("uid\t%u\n", pwp->pw_uid); 2202 if ((grp = getgrgid(pwp->pw_gid)) == NULL) 2203 (void) printf("groups\t%u", pwp->pw_gid); 2204 else 2205 (void) printf("groups\t%s", grp->gr_name); 2206 while ((grp = getgrent()) != NULL) { 2207 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2208 if (strcmp(*cpp, pwp->pw_name) == 0 && 2209 grp->gr_gid != pwp->pw_gid) 2210 (void) printf(" %s", grp->gr_name); 2211 } 2212 } 2213 (void) fputc('\n', stdout); 2214 (void) printf("change\t%s", pwp->pw_change ? ctime(&pwp->pw_change) : "NEVER\n"); 2215 #ifdef EXTENSIONS 2216 (void) printf("class\t%s\n", pwp->pw_class); 2217 #endif 2218 (void) printf("gecos\t%s\n", pwp->pw_gecos); 2219 (void) printf("dir\t%s\n", pwp->pw_dir); 2220 (void) printf("shell\t%s\n", pwp->pw_shell); 2221 (void) printf("expire\t%s", pwp->pw_expire ? ctime(&pwp->pw_expire) : "NEVER\n"); 2222 return EXIT_SUCCESS; 2223 } 2224 #endif 2225 2226 #ifdef EXTENSIONS 2227 /* display user information */ 2228 int 2229 groupinfo(int argc, char **argv) 2230 { 2231 struct group *grp; 2232 char **cpp; 2233 int exists; 2234 int i; 2235 2236 exists = 0; 2237 while ((i = getopt(argc, argv, "ev")) != -1) { 2238 switch(i) { 2239 case 'e': 2240 exists = 1; 2241 break; 2242 case 'v': 2243 verbose = 1; 2244 break; 2245 default: 2246 usermgmt_usage("groupinfo"); 2247 /* NOTREACHED */ 2248 } 2249 } 2250 argc -= optind; 2251 argv += optind; 2252 if (argc != 1) { 2253 usermgmt_usage("groupinfo"); 2254 } 2255 grp = find_group_info(*argv); 2256 if (exists) { 2257 exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE); 2258 } 2259 if (grp == NULL) { 2260 errx(EXIT_FAILURE, "can't find group `%s'", *argv); 2261 } 2262 (void) printf("name\t%s\n", grp->gr_name); 2263 (void) printf("passwd\t%s\n", grp->gr_passwd); 2264 (void) printf("gid\t%u\n", grp->gr_gid); 2265 (void) printf("members\t"); 2266 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2267 (void) printf("%s ", *cpp); 2268 } 2269 (void) fputc('\n', stdout); 2270 return EXIT_SUCCESS; 2271 } 2272 #endif 2273