1 /* $OpenBSD: user.c,v 1.71 2007/04/05 01:34:57 tedu 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 (void) strlcpy(home, up->u_home, sizeof(home)); 1067 } else { 1068 /* if home directory hasn't been given, make it up */ 1069 (void) snprintf(home, sizeof(home), "%s/%s", up->u_basedir, 1070 login_name); 1071 } 1072 if (!scantime(&inactive, up->u_inactive)) { 1073 warnx("Warning: inactive time `%s' invalid, password expiry off", 1074 up->u_inactive); 1075 } 1076 if (!scantime(&expire, up->u_expire)) { 1077 warnx("Warning: expire time `%s' invalid, account expiry off", 1078 up->u_expire); 1079 } 1080 if (lstat(home, &st) < 0 && !(up->u_flags & F_MKDIR) && 1081 strcmp(home, _PATH_NONEXISTENT) != 0) { 1082 warnx("Warning: home directory `%s' doesn't exist, and -m was" 1083 " not specified", home); 1084 } 1085 if (up->u_password != NULL && valid_password_length(up->u_password)) { 1086 (void) strlcpy(password, up->u_password, sizeof(password)); 1087 } else { 1088 (void) memset(password, '*', DES_Len); 1089 password[DES_Len] = 0; 1090 if (up->u_password != NULL) { 1091 warnx("Password `%s' is invalid: setting it to `%s'", 1092 up->u_password, password); 1093 } 1094 } 1095 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1096 login_name, 1097 password, 1098 up->u_uid, 1099 gid, 1100 #ifdef EXTENSIONS 1101 up->u_class, 1102 #else 1103 "", 1104 #endif 1105 (long) inactive, 1106 (long) expire, 1107 up->u_comment, 1108 home, 1109 up->u_shell); 1110 if (cc >= sizeof(buf) || cc < 0 || 1111 cc + expand_len(up->u_comment, login_name) >= 1023) { 1112 (void) close(ptmpfd); 1113 pw_abort(); 1114 errx(EXIT_FAILURE, "can't add `%s', line too long", buf); 1115 } 1116 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1117 (void) close(ptmpfd); 1118 pw_abort(); 1119 err(EXIT_FAILURE, "can't add `%s'", buf); 1120 } 1121 if (yp) { 1122 cc = snprintf(buf, sizeof(buf), "+:*::::::::\n"); 1123 if (cc == -1 || cc >= sizeof(buf)) { 1124 (void) close(ptmpfd); 1125 pw_abort(); 1126 errx(EXIT_FAILURE, "can't add `%s', line too long", buf); 1127 } 1128 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1129 (void) close(ptmpfd); 1130 pw_abort(); 1131 err(EXIT_FAILURE, "can't add `%s'", buf); 1132 } 1133 } 1134 if (up->u_flags & F_MKDIR) { 1135 if (lstat(home, &st) == 0) { 1136 (void) close(ptmpfd); 1137 pw_abort(); 1138 errx(EXIT_FAILURE, "home directory `%s' already exists", 1139 home); 1140 } else { 1141 if (asystem("%s -p %s", MKDIR, home) != 0) { 1142 (void) close(ptmpfd); 1143 pw_abort(); 1144 err(EXIT_FAILURE, "can't mkdir `%s'", home); 1145 } 1146 (void) copydotfiles(up->u_skeldir, up->u_uid, gid, home); 1147 } 1148 } 1149 if (strcmp(up->u_primgrp, "=uid") == 0 && 1150 getgrnam(login_name) == NULL && 1151 !creategid(login_name, gid, login_name)) { 1152 (void) close(ptmpfd); 1153 pw_abort(); 1154 errx(EXIT_FAILURE, "can't create gid %d for login name %s", 1155 gid, login_name); 1156 } 1157 if (up->u_groupc > 0 && !append_group(login_name, up->u_groupc, up->u_groupv)) { 1158 (void) close(ptmpfd); 1159 pw_abort(); 1160 errx(EXIT_FAILURE, "can't append `%s' to new groups", login_name); 1161 } 1162 (void) close(ptmpfd); 1163 if (pw_mkdb(yp ? NULL : login_name, 0) < 0) { 1164 pw_abort(); 1165 err(EXIT_FAILURE, "pw_mkdb failed"); 1166 } 1167 syslog(LOG_INFO, "new user added: name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1168 login_name, up->u_uid, gid, home, up->u_shell); 1169 return 1; 1170 } 1171 1172 /* remove a user from the groups file */ 1173 static int 1174 rm_user_from_groups(char *login_name) 1175 { 1176 struct stat st; 1177 size_t login_len; 1178 FILE *from; 1179 FILE *to; 1180 char buf[LINE_MAX]; 1181 char f[MaxFileNameLen]; 1182 char *cp, *ep; 1183 int fd; 1184 int cc; 1185 1186 login_len = strlen(login_name); 1187 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 1188 warn("can't remove gid for `%s': can't open `%s'", 1189 login_name, _PATH_GROUP); 1190 return 0; 1191 } 1192 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 1193 warn("can't lock `%s'", _PATH_GROUP); 1194 } 1195 (void) fstat(fileno(from), &st); 1196 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 1197 if ((fd = mkstemp(f)) < 0) { 1198 (void) fclose(from); 1199 warn("can't remove gid for `%s': mkstemp failed", login_name); 1200 return 0; 1201 } 1202 if ((to = fdopen(fd, "w")) == NULL) { 1203 (void) fclose(from); 1204 (void) close(fd); 1205 (void) unlink(f); 1206 warn("can't remove gid for `%s': fdopen `%s' failed", 1207 login_name, f); 1208 return 0; 1209 } 1210 while (fgets(buf, sizeof(buf), from) > 0) { 1211 cc = strlen(buf); 1212 if (buf[cc - 1] != '\n' && !feof(from)) { 1213 while (fgetc(from) != '\n' && !feof(from)) 1214 cc++; 1215 warn("%s: line `%s' too long (%d bytes), skipping", 1216 _PATH_GROUP, buf, cc); 1217 continue; 1218 } 1219 1220 /* Break out the group list. */ 1221 for (cp = buf, cc = 0; *cp != '\0' && cc < 3; cp++) { 1222 if (*cp == ':') 1223 cc++; 1224 } 1225 if (cc != 3) { 1226 warnx("Malformed entry `%.*s'. Skipping", 1227 (int)strlen(buf) - 1, buf); 1228 continue; 1229 } 1230 while ((cp = strstr(cp, login_name)) != NULL) { 1231 if ((cp[-1] == ':' || cp[-1] == ',') && 1232 (cp[login_len] == ',' || cp[login_len] == '\n')) { 1233 ep = cp + login_len; 1234 if (cp[login_len] == ',') 1235 ep++; 1236 else if (cp[-1] == ',') 1237 cp--; 1238 memmove(cp, ep, strlen(ep) + 1); 1239 } else { 1240 if ((cp = strchr(cp, ',')) == NULL) 1241 break; 1242 cp++; 1243 } 1244 } 1245 if (fwrite(buf, strlen(buf), 1, to) != 1) { 1246 (void) fclose(from); 1247 (void) fclose(to); 1248 (void) unlink(f); 1249 warn("can't remove gid for `%s': short write to `%s'", 1250 login_name, f); 1251 return 0; 1252 } 1253 } 1254 (void) fchmod(fileno(to), st.st_mode & 07777); 1255 (void) fclose(from); 1256 if (fclose(to) == EOF) { 1257 (void) unlink(f); 1258 warn("can't remove gid for `%s': short write to `%s'", 1259 login_name, f); 1260 return 0; 1261 } 1262 if (rename(f, _PATH_GROUP) < 0) { 1263 (void) unlink(f); 1264 warn("can't remove gid for `%s': can't rename `%s' to `%s'", 1265 login_name, f, _PATH_GROUP); 1266 return 0; 1267 } 1268 return 1; 1269 } 1270 1271 /* check that the user or group is local, not from YP/NIS */ 1272 static int 1273 is_local(char *name, const char *file) 1274 { 1275 FILE *fp; 1276 char buf[LINE_MAX]; 1277 size_t len; 1278 int ret; 1279 int cc; 1280 1281 if ((fp = fopen(file, "r")) == NULL) { 1282 err(EXIT_FAILURE, "can't open `%s'", file); 1283 } 1284 len = strlen(name); 1285 for (ret = 0 ; fgets(buf, sizeof(buf), fp) != NULL ; ) { 1286 cc = strlen(buf); 1287 if (buf[cc - 1] != '\n' && !feof(fp)) { 1288 while (fgetc(fp) != '\n' && !feof(fp)) 1289 cc++; 1290 warn("%s: line `%s' too long (%d bytes), skipping", 1291 file, buf, cc); 1292 continue; 1293 } 1294 if (strncmp(buf, name, len) == 0 && buf[len] == ':') { 1295 ret = 1; 1296 break; 1297 } 1298 } 1299 (void) fclose(fp); 1300 return ret; 1301 } 1302 1303 /* modify a user */ 1304 static int 1305 moduser(char *login_name, char *newlogin, user_t *up) 1306 { 1307 struct passwd *pwp; 1308 struct group *grp; 1309 const char *homedir; 1310 char buf[LINE_MAX]; 1311 size_t colonc, loginc; 1312 size_t cc; 1313 FILE *master; 1314 char newdir[MaxFileNameLen]; 1315 char *colon; 1316 int len; 1317 int masterfd; 1318 int ptmpfd; 1319 int rval; 1320 1321 if (!valid_login(newlogin)) { 1322 errx(EXIT_FAILURE, "`%s' is not a valid login name", login_name); 1323 } 1324 if ((pwp = getpwnam(login_name)) == NULL) { 1325 errx(EXIT_FAILURE, "No such user `%s'", login_name); 1326 } 1327 if (!is_local(login_name, _PATH_MASTERPASSWD)) { 1328 errx(EXIT_FAILURE, "User `%s' must be a local user", login_name); 1329 } 1330 /* keep dir name in case we need it for '-m' */ 1331 homedir = pwp->pw_dir; 1332 1333 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1334 err(EXIT_FAILURE, "can't open `%s'", _PATH_MASTERPASSWD); 1335 } 1336 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1337 err(EXIT_FAILURE, "can't lock `%s'", _PATH_MASTERPASSWD); 1338 } 1339 pw_init(); 1340 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1341 (void) close(masterfd); 1342 err(EXIT_FAILURE, "can't obtain pw_lock"); 1343 } 1344 if ((master = fdopen(masterfd, "r")) == NULL) { 1345 (void) close(masterfd); 1346 (void) close(ptmpfd); 1347 pw_abort(); 1348 err(EXIT_FAILURE, "can't fdopen fd for %s", _PATH_MASTERPASSWD); 1349 } 1350 if (up != NULL) { 1351 if (up->u_flags & F_USERNAME) { 1352 /* if changing name, check new name isn't already in use */ 1353 if (strcmp(login_name, newlogin) != 0 && getpwnam(newlogin) != NULL) { 1354 (void) close(ptmpfd); 1355 pw_abort(); 1356 errx(EXIT_FAILURE, "already a `%s' user", newlogin); 1357 } 1358 pwp->pw_name = newlogin; 1359 1360 /* 1361 * Provide a new directory name in case the 1362 * home directory is to be moved. 1363 */ 1364 if (up->u_flags & F_MKDIR) { 1365 (void) snprintf(newdir, sizeof(newdir), 1366 "%s/%s", up->u_basedir, newlogin); 1367 pwp->pw_dir = newdir; 1368 } 1369 } 1370 if (up->u_flags & F_PASSWORD) { 1371 if (up->u_password != NULL) { 1372 if (!valid_password_length(up->u_password)) { 1373 (void) close(ptmpfd); 1374 pw_abort(); 1375 errx(EXIT_FAILURE, "Invalid password: `%s'", 1376 up->u_password); 1377 } 1378 pwp->pw_passwd = up->u_password; 1379 } 1380 } 1381 if (up->u_flags & F_UID) { 1382 /* check uid isn't already allocated */ 1383 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1384 (void) close(ptmpfd); 1385 pw_abort(); 1386 errx(EXIT_FAILURE, "uid %u is already in use", up->u_uid); 1387 } 1388 pwp->pw_uid = up->u_uid; 1389 } 1390 if (up->u_flags & F_GROUP) { 1391 /* if -g=uid was specified, check gid is unused */ 1392 if (strcmp(up->u_primgrp, "=uid") == 0) { 1393 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1394 (void) close(ptmpfd); 1395 pw_abort(); 1396 errx(EXIT_FAILURE, "gid %u is already in use", up->u_uid); 1397 } 1398 pwp->pw_gid = up->u_uid; 1399 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1400 pwp->pw_gid = grp->gr_gid; 1401 } else if (is_number(up->u_primgrp) && 1402 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1403 pwp->pw_gid = grp->gr_gid; 1404 } else { 1405 (void) close(ptmpfd); 1406 pw_abort(); 1407 errx(EXIT_FAILURE, "group %s not found", up->u_primgrp); 1408 } 1409 } 1410 if (up->u_flags & F_INACTIVE) { 1411 if (!scantime(&pwp->pw_change, up->u_inactive)) { 1412 warnx("Warning: inactive time `%s' invalid, password expiry off", 1413 up->u_inactive); 1414 } 1415 } 1416 if (up->u_flags & F_EXPIRE) { 1417 if (!scantime(&pwp->pw_expire, up->u_expire)) { 1418 warnx("Warning: expire time `%s' invalid, account expiry off", 1419 up->u_expire); 1420 } 1421 } 1422 if (up->u_flags & F_COMMENT) 1423 pwp->pw_gecos = up->u_comment; 1424 if (up->u_flags & F_HOMEDIR) 1425 pwp->pw_dir = up->u_home; 1426 if (up->u_flags & F_SHELL) 1427 pwp->pw_shell = up->u_shell; 1428 #ifdef EXTENSIONS 1429 if (up->u_flags & F_CLASS) { 1430 if (!valid_class(up->u_class)) { 1431 (void) close(ptmpfd); 1432 pw_abort(); 1433 errx(EXIT_FAILURE, 1434 "No such login class `%s'", up->u_class); 1435 } 1436 pwp->pw_class = up->u_class; 1437 } 1438 #endif 1439 } 1440 loginc = strlen(login_name); 1441 while (fgets(buf, sizeof(buf), master) != NULL) { 1442 if ((colon = strchr(buf, ':')) == NULL) { 1443 warnx("Malformed entry `%s'. Skipping", buf); 1444 continue; 1445 } 1446 colonc = (size_t)(colon - buf); 1447 if (strncmp(login_name, buf, loginc) == 0 && loginc == colonc) { 1448 if (up != NULL) { 1449 if ((len = snprintf(buf, sizeof(buf), 1450 "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1451 newlogin, 1452 pwp->pw_passwd, 1453 pwp->pw_uid, 1454 pwp->pw_gid, 1455 #ifdef EXTENSIONS 1456 pwp->pw_class, 1457 #else 1458 "", 1459 #endif 1460 (long)pwp->pw_change, 1461 (long)pwp->pw_expire, 1462 pwp->pw_gecos, 1463 pwp->pw_dir, 1464 pwp->pw_shell)) >= sizeof(buf) || len < 0 || 1465 len + expand_len(pwp->pw_gecos, newlogin) 1466 >= 1023) { 1467 (void) close(ptmpfd); 1468 pw_abort(); 1469 errx(EXIT_FAILURE, "can't add `%s', " 1470 "line too long (%d bytes)", buf, 1471 len + expand_len(pwp->pw_gecos, 1472 newlogin)); 1473 } 1474 if (write(ptmpfd, buf, len) != len) { 1475 (void) close(ptmpfd); 1476 pw_abort(); 1477 err(EXIT_FAILURE, "can't add `%s'", buf); 1478 } 1479 } 1480 } else { 1481 len = strlen(buf); 1482 if ((cc = write(ptmpfd, buf, len)) != len) { 1483 (void) close(masterfd); 1484 (void) close(ptmpfd); 1485 pw_abort(); 1486 err(EXIT_FAILURE, "short write to /etc/ptmp (%lld not %lld chars)", 1487 (long long)cc, (long long)len); 1488 } 1489 } 1490 } 1491 if (up != NULL) { 1492 if ((up->u_flags & F_MKDIR) && 1493 asystem("%s %s %s", MV, homedir, pwp->pw_dir) != 0) { 1494 (void) close(ptmpfd); 1495 pw_abort(); 1496 err(EXIT_FAILURE, "can't move `%s' to `%s'", 1497 homedir, pwp->pw_dir); 1498 } 1499 if (up->u_groupc > 0 && 1500 !append_group(newlogin, up->u_groupc, up->u_groupv)) { 1501 (void) close(ptmpfd); 1502 pw_abort(); 1503 errx(EXIT_FAILURE, "can't append `%s' to new groups", 1504 newlogin); 1505 } 1506 } 1507 (void) close(ptmpfd); 1508 if (up != NULL && strcmp(login_name, newlogin) == 0) 1509 rval = pw_mkdb(login_name, 0); 1510 else 1511 rval = pw_mkdb(NULL, 0); 1512 if (rval == -1) { 1513 pw_abort(); 1514 err(EXIT_FAILURE, "pw_mkdb failed"); 1515 } 1516 if (up == NULL) { 1517 syslog(LOG_INFO, "user removed: name=%s", login_name); 1518 } else if (strcmp(login_name, newlogin) == 0) { 1519 syslog(LOG_INFO, "user information modified: name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1520 login_name, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, pwp->pw_shell); 1521 } else { 1522 syslog(LOG_INFO, "user information modified: name=%s, new name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1523 login_name, newlogin, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, pwp->pw_shell); 1524 } 1525 return 1; 1526 } 1527 1528 1529 #ifdef EXTENSIONS 1530 /* see if we can find out the user struct */ 1531 static struct passwd * 1532 find_user_info(char *name) 1533 { 1534 struct passwd *pwp; 1535 1536 if ((pwp = getpwnam(name)) != NULL) { 1537 return pwp; 1538 } 1539 if (is_number(name) && (pwp = getpwuid((uid_t)atoi(name))) != NULL) { 1540 return pwp; 1541 } 1542 return NULL; 1543 } 1544 #endif 1545 1546 #ifdef EXTENSIONS 1547 /* see if we can find out the group struct */ 1548 static struct group * 1549 find_group_info(char *name) 1550 { 1551 struct group *grp; 1552 1553 if ((grp = getgrnam(name)) != NULL) { 1554 return grp; 1555 } 1556 if (is_number(name) && (grp = getgrgid((gid_t)atoi(name))) != NULL) { 1557 return grp; 1558 } 1559 return NULL; 1560 } 1561 #endif 1562 1563 /* print out usage message, and then exit */ 1564 void 1565 usermgmt_usage(const char *prog) 1566 { 1567 if (strcmp(prog, "useradd") == 0) { 1568 (void) fprintf(stderr, "usage: %s -D [-b basedir] [-e expiry] " 1569 "[-f changetime] [-g group]\n\t\t[-k skeletondir] " 1570 "[-r low..high] [-s shell] [-L class]\n", prog); 1571 (void) fprintf(stderr, "usage: %s [-mov] [-G group[,group,...]]" 1572 " [-b basedir] [-c comment]\n\t\t" 1573 "[-d homedir] [-e expiry] [-f changetime] [-g group]\n\t\t" 1574 "[-k skeletondir] [-p password] " 1575 "[-r lowuid..highuid]\n\t\t[-s shell] [-u uid] [-L class] " 1576 "user\n", prog); 1577 } else if (strcmp(prog, "usermod") == 0) { 1578 (void) fprintf(stderr, "usage: %s [-mov] [-G group[,group,...]]" 1579 " [-c comment] [-d homedir]\n\t\t" 1580 "[-e expire] [-f changetime] [-g group] [-l newname]\n\t\t" 1581 "[-p password] [-s shell] [-u uid] [-L class] user\n", 1582 prog); 1583 } else if (strcmp(prog, "userdel") == 0) { 1584 (void) fprintf(stderr, "usage: %s -D [-p preserve]\n", prog); 1585 (void) fprintf(stderr, "usage: %s [-prv] user\n", prog); 1586 #ifdef EXTENSIONS 1587 } else if (strcmp(prog, "userinfo") == 0) { 1588 (void) fprintf(stderr, "usage: %s [-ev] user\n", prog); 1589 #endif 1590 } else if (strcmp(prog, "groupadd") == 0) { 1591 (void) fprintf(stderr, "usage: %s [-ov] [-g gid] group\n", 1592 prog); 1593 } else if (strcmp(prog, "groupdel") == 0) { 1594 (void) fprintf(stderr, "usage: %s [-v] group\n", prog); 1595 } else if (strcmp(prog, "groupmod") == 0) { 1596 (void) fprintf(stderr, "usage: %s [-ov] [-g gid] [-n newname] " 1597 "group\n", prog); 1598 } else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) { 1599 (void) fprintf(stderr, "usage: %s [ add | del | mod " 1600 #ifdef EXTENSIONS 1601 "| info " 1602 #endif 1603 "] ...\n", 1604 prog); 1605 #ifdef EXTENSIONS 1606 } else if (strcmp(prog, "groupinfo") == 0) { 1607 (void) fprintf(stderr, "usage: %s [-ev] group\n", prog); 1608 #endif 1609 } else { 1610 (void) fprintf(stderr, "This program must be called as {user,group}{add,del,mod,info},\n%s is not an understood name.\n", prog); 1611 } 1612 exit(EXIT_FAILURE); 1613 /* NOTREACHED */ 1614 } 1615 1616 #ifdef EXTENSIONS 1617 #define ADD_OPT_EXTENSIONS "p:r:vL:" 1618 #else 1619 #define ADD_OPT_EXTENSIONS 1620 #endif 1621 1622 int 1623 useradd(int argc, char **argv) 1624 { 1625 user_t u; 1626 int defaultfield; 1627 int bigD; 1628 int c; 1629 #ifdef EXTENSIONS 1630 int i; 1631 #endif 1632 1633 (void) memset(&u, 0, sizeof(u)); 1634 read_defaults(&u); 1635 u.u_uid = UID_MAX; 1636 defaultfield = bigD = 0; 1637 while ((c = getopt(argc, argv, "DG:b:c:d:e:f:g:k:mou:s:" ADD_OPT_EXTENSIONS)) != -1) { 1638 switch(c) { 1639 case 'D': 1640 bigD = 1; 1641 break; 1642 case 'G': 1643 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1644 u.u_groupc < NGROUPS_MAX - 2) { 1645 if (u.u_groupv[u.u_groupc][0] != 0) { 1646 u.u_groupc++; 1647 } 1648 } 1649 if (optarg != NULL) { 1650 warnx("Truncated list of secondary groups to %d entries", NGROUPS_MAX - 2); 1651 } 1652 break; 1653 case 'b': 1654 defaultfield = 1; 1655 memsave(&u.u_basedir, optarg, strlen(optarg)); 1656 break; 1657 case 'c': 1658 memsave(&u.u_comment, optarg, strlen(optarg)); 1659 break; 1660 case 'd': 1661 memsave(&u.u_home, optarg, strlen(optarg)); 1662 u.u_flags |= F_HOMEDIR; 1663 break; 1664 case 'e': 1665 defaultfield = 1; 1666 memsave(&u.u_expire, optarg, strlen(optarg)); 1667 break; 1668 case 'f': 1669 defaultfield = 1; 1670 memsave(&u.u_inactive, optarg, strlen(optarg)); 1671 break; 1672 case 'g': 1673 defaultfield = 1; 1674 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1675 break; 1676 case 'k': 1677 defaultfield = 1; 1678 memsave(&u.u_skeldir, optarg, strlen(optarg)); 1679 break; 1680 #ifdef EXTENSIONS 1681 case 'L': 1682 defaultfield = 1; 1683 memsave(&u.u_class, optarg, strlen(optarg)); 1684 break; 1685 #endif 1686 case 'm': 1687 u.u_flags |= F_MKDIR; 1688 break; 1689 case 'o': 1690 u.u_flags |= F_DUPUID; 1691 break; 1692 #ifdef EXTENSIONS 1693 case 'p': 1694 memsave(&u.u_password, optarg, strlen(optarg)); 1695 memset(optarg, 'X', strlen(optarg)); 1696 break; 1697 #endif 1698 #ifdef EXTENSIONS 1699 case 'r': 1700 defaultfield = 1; 1701 (void) save_range(&u, optarg); 1702 break; 1703 #endif 1704 case 's': 1705 defaultfield = 1; 1706 memsave(&u.u_shell, optarg, strlen(optarg)); 1707 break; 1708 case 'u': 1709 if (!is_number(optarg)) { 1710 errx(EXIT_FAILURE, "When using [-u uid], the uid must be numeric"); 1711 } 1712 u.u_uid = atoi(optarg); 1713 break; 1714 #ifdef EXTENSIONS 1715 case 'v': 1716 verbose = 1; 1717 break; 1718 #endif 1719 default: 1720 usermgmt_usage("useradd"); 1721 /* NOTREACHED */ 1722 } 1723 } 1724 if (bigD) { 1725 if (defaultfield) { 1726 checkeuid(); 1727 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1728 } 1729 (void) printf("group\t\t%s\n", u.u_primgrp); 1730 (void) printf("base_dir\t%s\n", u.u_basedir); 1731 (void) printf("skel_dir\t%s\n", u.u_skeldir); 1732 (void) printf("shell\t\t%s\n", u.u_shell); 1733 #ifdef EXTENSIONS 1734 (void) printf("class\t\t%s\n", u.u_class); 1735 #endif 1736 (void) printf("inactive\t%s\n", (u.u_inactive == NULL) ? UNSET_INACTIVE : u.u_inactive); 1737 (void) printf("expire\t\t%s\n", (u.u_expire == NULL) ? UNSET_EXPIRY : u.u_expire); 1738 #ifdef EXTENSIONS 1739 for (i = 0 ; i < u.u_rc ; i++) { 1740 (void) printf("range\t\t%d..%d\n", u.u_rv[i].r_from, u.u_rv[i].r_to); 1741 } 1742 #endif 1743 return EXIT_SUCCESS; 1744 } 1745 argc -= optind; 1746 argv += optind; 1747 if (argc != 1) { 1748 usermgmt_usage("useradd"); 1749 } 1750 checkeuid(); 1751 openlog("useradd", LOG_PID, LOG_USER); 1752 return adduser(*argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1753 } 1754 1755 #ifdef EXTENSIONS 1756 #define MOD_OPT_EXTENSIONS "p:vL:" 1757 #else 1758 #define MOD_OPT_EXTENSIONS 1759 #endif 1760 1761 int 1762 usermod(int argc, char **argv) 1763 { 1764 user_t u; 1765 char newuser[MaxUserNameLen + 1]; 1766 int c, have_new_user; 1767 1768 (void) memset(&u, 0, sizeof(u)); 1769 (void) memset(newuser, 0, sizeof(newuser)); 1770 read_defaults(&u); 1771 free(u.u_primgrp); 1772 u.u_primgrp = NULL; 1773 have_new_user = 0; 1774 while ((c = getopt(argc, argv, "G:c:d:e:f:g:l:mos:u:" MOD_OPT_EXTENSIONS)) != -1) { 1775 switch(c) { 1776 case 'G': 1777 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1778 u.u_groupc < NGROUPS_MAX - 2) { 1779 if (u.u_groupv[u.u_groupc][0] != 0) { 1780 u.u_groupc++; 1781 } 1782 } 1783 if (optarg != NULL) { 1784 warnx("Truncated list of secondary groups to %d entries", NGROUPS_MAX - 2); 1785 } 1786 u.u_flags |= F_SECGROUP; 1787 break; 1788 case 'c': 1789 memsave(&u.u_comment, optarg, strlen(optarg)); 1790 u.u_flags |= F_COMMENT; 1791 break; 1792 case 'd': 1793 memsave(&u.u_home, optarg, strlen(optarg)); 1794 u.u_flags |= F_HOMEDIR; 1795 break; 1796 case 'e': 1797 memsave(&u.u_expire, optarg, strlen(optarg)); 1798 u.u_flags |= F_EXPIRE; 1799 break; 1800 case 'f': 1801 memsave(&u.u_inactive, optarg, strlen(optarg)); 1802 u.u_flags |= F_INACTIVE; 1803 break; 1804 case 'g': 1805 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1806 u.u_flags |= F_GROUP; 1807 break; 1808 case 'l': 1809 (void) strlcpy(newuser, optarg, sizeof(newuser)); 1810 have_new_user = 1; 1811 u.u_flags |= F_USERNAME; 1812 break; 1813 #ifdef EXTENSIONS 1814 case 'L': 1815 memsave(&u.u_class, optarg, strlen(optarg)); 1816 u.u_flags |= F_CLASS; 1817 break; 1818 #endif 1819 case 'm': 1820 u.u_flags |= F_MKDIR; 1821 break; 1822 case 'o': 1823 u.u_flags |= F_DUPUID; 1824 break; 1825 #ifdef EXTENSIONS 1826 case 'p': 1827 memsave(&u.u_password, optarg, strlen(optarg)); 1828 memset(optarg, 'X', strlen(optarg)); 1829 u.u_flags |= F_PASSWORD; 1830 break; 1831 #endif 1832 case 's': 1833 memsave(&u.u_shell, optarg, strlen(optarg)); 1834 u.u_flags |= F_SHELL; 1835 break; 1836 case 'u': 1837 if (!is_number(optarg)) { 1838 errx(EXIT_FAILURE, "When using [-u uid], the uid must be numeric"); 1839 } 1840 u.u_uid = atoi(optarg); 1841 u.u_flags |= F_UID; 1842 break; 1843 #ifdef EXTENSIONS 1844 case 'v': 1845 verbose = 1; 1846 break; 1847 #endif 1848 default: 1849 usermgmt_usage("usermod"); 1850 /* NOTREACHED */ 1851 } 1852 } 1853 if ((u.u_flags & F_MKDIR) && !(u.u_flags & F_HOMEDIR) && 1854 !(u.u_flags & F_USERNAME)) { 1855 warnx("option 'm' useless without 'd' or 'l' -- ignored"); 1856 u.u_flags &= ~F_MKDIR; 1857 } 1858 argc -= optind; 1859 argv += optind; 1860 if (argc != 1) { 1861 usermgmt_usage("usermod"); 1862 } 1863 checkeuid(); 1864 openlog("usermod", LOG_PID, LOG_USER); 1865 return moduser(*argv, (have_new_user) ? newuser : *argv, &u) ? 1866 EXIT_SUCCESS : EXIT_FAILURE; 1867 } 1868 1869 #ifdef EXTENSIONS 1870 #define DEL_OPT_EXTENSIONS "Dp:v" 1871 #else 1872 #define DEL_OPT_EXTENSIONS 1873 #endif 1874 1875 int 1876 userdel(int argc, char **argv) 1877 { 1878 struct passwd *pwp; 1879 user_t u; 1880 char password[PasswordLength + 1]; 1881 int defaultfield; 1882 int rmhome; 1883 int bigD; 1884 int c; 1885 1886 (void) memset(&u, 0, sizeof(u)); 1887 read_defaults(&u); 1888 defaultfield = bigD = rmhome = 0; 1889 while ((c = getopt(argc, argv, "r" DEL_OPT_EXTENSIONS)) != -1) { 1890 switch(c) { 1891 #ifdef EXTENSIONS 1892 case 'D': 1893 bigD = 1; 1894 break; 1895 #endif 1896 #ifdef EXTENSIONS 1897 case 'p': 1898 defaultfield = 1; 1899 u.u_preserve = (strcmp(optarg, "true") == 0) ? 1 : 1900 (strcmp(optarg, "yes") == 0) ? 1 : 1901 atoi(optarg); 1902 break; 1903 #endif 1904 case 'r': 1905 rmhome = 1; 1906 break; 1907 #ifdef EXTENSIONS 1908 case 'v': 1909 verbose = 1; 1910 break; 1911 #endif 1912 default: 1913 usermgmt_usage("userdel"); 1914 /* NOTREACHED */ 1915 } 1916 } 1917 #ifdef EXTENSIONS 1918 if (bigD) { 1919 if (defaultfield) { 1920 checkeuid(); 1921 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1922 } 1923 (void) printf("preserve\t%s\n", (u.u_preserve) ? "true" : "false"); 1924 return EXIT_SUCCESS; 1925 } 1926 #endif 1927 argc -= optind; 1928 argv += optind; 1929 if (argc != 1) { 1930 usermgmt_usage("userdel"); 1931 } 1932 checkeuid(); 1933 if ((pwp = getpwnam(*argv)) == NULL) { 1934 warnx("No such user `%s'", *argv); 1935 return EXIT_FAILURE; 1936 } 1937 if (rmhome) 1938 (void)removehomedir(pwp->pw_name, pwp->pw_uid, pwp->pw_dir); 1939 if (u.u_preserve) { 1940 u.u_flags |= F_SHELL; 1941 memsave(&u.u_shell, NOLOGIN, strlen(NOLOGIN)); 1942 (void) memset(password, '*', DES_Len); 1943 password[DES_Len] = 0; 1944 memsave(&u.u_password, password, strlen(password)); 1945 u.u_flags |= F_PASSWORD; 1946 openlog("userdel", LOG_PID, LOG_USER); 1947 return moduser(*argv, *argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1948 } 1949 if (!rm_user_from_groups(*argv)) { 1950 return 0; 1951 } 1952 openlog("userdel", LOG_PID, LOG_USER); 1953 return moduser(*argv, *argv, NULL) ? EXIT_SUCCESS : EXIT_FAILURE; 1954 } 1955 1956 #ifdef EXTENSIONS 1957 #define GROUP_ADD_OPT_EXTENSIONS "v" 1958 #else 1959 #define GROUP_ADD_OPT_EXTENSIONS 1960 #endif 1961 1962 /* add a group */ 1963 int 1964 groupadd(int argc, char **argv) 1965 { 1966 int dupgid; 1967 int gid; 1968 int c; 1969 1970 gid = GID_MAX; 1971 dupgid = 0; 1972 while ((c = getopt(argc, argv, "g:o" GROUP_ADD_OPT_EXTENSIONS)) != -1) { 1973 switch(c) { 1974 case 'g': 1975 if (!is_number(optarg)) { 1976 errx(EXIT_FAILURE, "When using [-g gid], the gid must be numeric"); 1977 } 1978 gid = atoi(optarg); 1979 break; 1980 case 'o': 1981 dupgid = 1; 1982 break; 1983 #ifdef EXTENSIONS 1984 case 'v': 1985 verbose = 1; 1986 break; 1987 #endif 1988 default: 1989 usermgmt_usage("groupadd"); 1990 /* NOTREACHED */ 1991 } 1992 } 1993 argc -= optind; 1994 argv += optind; 1995 if (argc != 1) { 1996 usermgmt_usage("groupadd"); 1997 } 1998 checkeuid(); 1999 if (!valid_group(*argv)) { 2000 errx(EXIT_FAILURE, "invalid group name `%s'", *argv); 2001 } 2002 if (gid < 0 && !getnextgid(&gid, LowGid, HighGid)) { 2003 errx(EXIT_FAILURE, "can't add group: can't get next gid"); 2004 } 2005 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 2006 errx(EXIT_FAILURE, "can't add group: gid %d is a duplicate", gid); 2007 } 2008 openlog("groupadd", LOG_PID, LOG_USER); 2009 if (!creategid(*argv, gid, "")) { 2010 errx(EXIT_FAILURE, "can't add group: problems with %s file", 2011 _PATH_GROUP); 2012 } 2013 return EXIT_SUCCESS; 2014 } 2015 2016 #ifdef EXTENSIONS 2017 #define GROUP_DEL_OPT_EXTENSIONS "v" 2018 #else 2019 #define GROUP_DEL_OPT_EXTENSIONS 2020 #endif 2021 2022 /* remove a group */ 2023 int 2024 groupdel(int argc, char **argv) 2025 { 2026 int c; 2027 2028 while ((c = getopt(argc, argv, "" GROUP_DEL_OPT_EXTENSIONS)) != -1) { 2029 switch(c) { 2030 #ifdef EXTENSIONS 2031 case 'v': 2032 verbose = 1; 2033 break; 2034 #endif 2035 default: 2036 usermgmt_usage("groupdel"); 2037 /* NOTREACHED */ 2038 } 2039 } 2040 argc -= optind; 2041 argv += optind; 2042 if (argc != 1) { 2043 usermgmt_usage("groupdel"); 2044 } 2045 checkeuid(); 2046 openlog("groupdel", LOG_PID, LOG_USER); 2047 if (getgrnam(*argv) == NULL) { 2048 warnx("No such group: `%s'", *argv); 2049 return EXIT_FAILURE; 2050 } 2051 if (!modify_gid(*argv, NULL)) { 2052 err(EXIT_FAILURE, "can't change %s file", _PATH_GROUP); 2053 } 2054 return EXIT_SUCCESS; 2055 } 2056 2057 #ifdef EXTENSIONS 2058 #define GROUP_MOD_OPT_EXTENSIONS "v" 2059 #else 2060 #define GROUP_MOD_OPT_EXTENSIONS 2061 #endif 2062 2063 /* modify a group */ 2064 int 2065 groupmod(int argc, char **argv) 2066 { 2067 struct group *grp; 2068 char buf[LINE_MAX]; 2069 char *newname; 2070 char **cpp; 2071 int dupgid; 2072 int gid; 2073 int cc; 2074 int c; 2075 2076 gid = GID_MAX; 2077 dupgid = 0; 2078 newname = NULL; 2079 while ((c = getopt(argc, argv, "g:on:" GROUP_MOD_OPT_EXTENSIONS)) != -1) { 2080 switch(c) { 2081 case 'g': 2082 if (!is_number(optarg)) { 2083 errx(EXIT_FAILURE, "When using [-g gid], the gid must be numeric"); 2084 } 2085 gid = atoi(optarg); 2086 break; 2087 case 'o': 2088 dupgid = 1; 2089 break; 2090 case 'n': 2091 memsave(&newname, optarg, strlen(optarg)); 2092 break; 2093 #ifdef EXTENSIONS 2094 case 'v': 2095 verbose = 1; 2096 break; 2097 #endif 2098 default: 2099 usermgmt_usage("groupmod"); 2100 /* NOTREACHED */ 2101 } 2102 } 2103 argc -= optind; 2104 argv += optind; 2105 if (argc != 1) { 2106 usermgmt_usage("groupmod"); 2107 } 2108 checkeuid(); 2109 if (gid < 0 && newname == NULL) { 2110 errx(EXIT_FAILURE, "Nothing to change"); 2111 } 2112 if (dupgid && gid < 0) { 2113 errx(EXIT_FAILURE, "Duplicate which gid?"); 2114 } 2115 if ((grp = getgrnam(*argv)) == NULL) { 2116 errx(EXIT_FAILURE, "can't find group `%s' to modify", *argv); 2117 } 2118 if (!is_local(*argv, _PATH_GROUP)) { 2119 errx(EXIT_FAILURE, "Group `%s' must be a local group", *argv); 2120 } 2121 if (newname != NULL && !valid_group(newname)) { 2122 errx(EXIT_FAILURE, "invalid group name `%s'", newname); 2123 } 2124 if ((cc = snprintf(buf, sizeof(buf), "%s:%s:%u:", 2125 (newname) ? newname : grp->gr_name, grp->gr_passwd, 2126 (gid < 0) ? grp->gr_gid : gid)) >= sizeof(buf) || cc < 0) 2127 errx(EXIT_FAILURE, "group `%s' entry too long", grp->gr_name); 2128 2129 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2130 cc = strlcat(buf, *cpp, sizeof(buf)) + 1; 2131 if (cc >= sizeof(buf)) 2132 errx(EXIT_FAILURE, "group `%s' entry too long", 2133 grp->gr_name); 2134 if (cpp[1] != NULL) { 2135 buf[cc - 1] = ','; 2136 buf[cc] = '\0'; 2137 } 2138 } 2139 cc = strlcat(buf, "\n", sizeof(buf)); 2140 if (cc >= sizeof(buf)) 2141 errx(EXIT_FAILURE, "group `%s' entry too long", grp->gr_name); 2142 2143 openlog("groupmod", LOG_PID, LOG_USER); 2144 if (!modify_gid(*argv, buf)) 2145 err(EXIT_FAILURE, "can't change %s file", _PATH_GROUP); 2146 return EXIT_SUCCESS; 2147 } 2148 2149 #ifdef EXTENSIONS 2150 /* display user information */ 2151 int 2152 userinfo(int argc, char **argv) 2153 { 2154 struct passwd *pwp; 2155 struct group *grp; 2156 char **cpp; 2157 int exists; 2158 int i; 2159 2160 exists = 0; 2161 while ((i = getopt(argc, argv, "ev")) != -1) { 2162 switch(i) { 2163 case 'e': 2164 exists = 1; 2165 break; 2166 case 'v': 2167 verbose = 1; 2168 break; 2169 default: 2170 usermgmt_usage("userinfo"); 2171 /* NOTREACHED */ 2172 } 2173 } 2174 argc -= optind; 2175 argv += optind; 2176 if (argc != 1) { 2177 usermgmt_usage("userinfo"); 2178 } 2179 pwp = find_user_info(*argv); 2180 if (exists) { 2181 exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE); 2182 } 2183 if (pwp == NULL) { 2184 errx(EXIT_FAILURE, "can't find user `%s'", *argv); 2185 } 2186 (void) printf("login\t%s\n", pwp->pw_name); 2187 (void) printf("passwd\t%s\n", pwp->pw_passwd); 2188 (void) printf("uid\t%u\n", pwp->pw_uid); 2189 if ((grp = getgrgid(pwp->pw_gid)) == NULL) 2190 (void) printf("groups\t%u", pwp->pw_gid); 2191 else 2192 (void) printf("groups\t%s", grp->gr_name); 2193 while ((grp = getgrent()) != NULL) { 2194 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2195 if (strcmp(*cpp, pwp->pw_name) == 0 && 2196 grp->gr_gid != pwp->pw_gid) 2197 (void) printf(" %s", grp->gr_name); 2198 } 2199 } 2200 (void) fputc('\n', stdout); 2201 (void) printf("change\t%s", pwp->pw_change ? ctime(&pwp->pw_change) : "NEVER\n"); 2202 #ifdef EXTENSIONS 2203 (void) printf("class\t%s\n", pwp->pw_class); 2204 #endif 2205 (void) printf("gecos\t%s\n", pwp->pw_gecos); 2206 (void) printf("dir\t%s\n", pwp->pw_dir); 2207 (void) printf("shell\t%s\n", pwp->pw_shell); 2208 (void) printf("expire\t%s", pwp->pw_expire ? ctime(&pwp->pw_expire) : "NEVER\n"); 2209 return EXIT_SUCCESS; 2210 } 2211 #endif 2212 2213 #ifdef EXTENSIONS 2214 /* display user information */ 2215 int 2216 groupinfo(int argc, char **argv) 2217 { 2218 struct group *grp; 2219 char **cpp; 2220 int exists; 2221 int i; 2222 2223 exists = 0; 2224 while ((i = getopt(argc, argv, "ev")) != -1) { 2225 switch(i) { 2226 case 'e': 2227 exists = 1; 2228 break; 2229 case 'v': 2230 verbose = 1; 2231 break; 2232 default: 2233 usermgmt_usage("groupinfo"); 2234 /* NOTREACHED */ 2235 } 2236 } 2237 argc -= optind; 2238 argv += optind; 2239 if (argc != 1) { 2240 usermgmt_usage("groupinfo"); 2241 } 2242 grp = find_group_info(*argv); 2243 if (exists) { 2244 exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE); 2245 } 2246 if (grp == NULL) { 2247 errx(EXIT_FAILURE, "can't find group `%s'", *argv); 2248 } 2249 (void) printf("name\t%s\n", grp->gr_name); 2250 (void) printf("passwd\t%s\n", grp->gr_passwd); 2251 (void) printf("gid\t%u\n", grp->gr_gid); 2252 (void) printf("members\t"); 2253 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2254 (void) printf("%s ", *cpp); 2255 } 2256 (void) fputc('\n', stdout); 2257 return EXIT_SUCCESS; 2258 } 2259 #endif 2260