1 /* $OpenBSD: user.c,v 1.90 2012/01/29 08:38:54 ajacoutot 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 #include <login_cap.h> 44 #include <paths.h> 45 #include <pwd.h> 46 #include <stdarg.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <syslog.h> 51 #include <time.h> 52 #include <unistd.h> 53 #include <util.h> 54 55 #include "defs.h" 56 #include "usermgmt.h" 57 58 59 /* this struct describes a uid range */ 60 typedef struct range_t { 61 uid_t r_from; /* low uid */ 62 uid_t r_to; /* high uid */ 63 } range_t; 64 65 /* this struct encapsulates the user information */ 66 typedef struct user_t { 67 int u_flags; /* see below */ 68 uid_t u_uid; /* uid of user */ 69 char *u_password; /* encrypted password */ 70 char *u_comment; /* comment field */ 71 char *u_home; /* home directory */ 72 char *u_primgrp; /* primary group */ 73 int u_groupc; /* # of secondary groups */ 74 const char *u_groupv[NGROUPS_MAX]; /* secondary groups */ 75 char *u_shell; /* user's shell */ 76 char *u_basedir; /* base directory for home */ 77 char *u_expire; /* when account will expire */ 78 char *u_inactive; /* when password will expire */ 79 char *u_skeldir; /* directory for startup files */ 80 char *u_class; /* login class */ 81 unsigned int u_rsize; /* size of range array */ 82 unsigned int u_rc; /* # of ranges */ 83 range_t *u_rv; /* the ranges */ 84 unsigned int u_defrc; /* # of ranges in defaults */ 85 int u_preserve; /* preserve uids on deletion */ 86 } user_t; 87 88 /* flags for which fields of the user_t replace the passwd entry */ 89 enum { 90 F_COMMENT = 0x0001, 91 F_DUPUID = 0x0002, 92 F_EXPIRE = 0x0004, 93 F_GROUP = 0x0008, 94 F_HOMEDIR = 0x0010, 95 F_MKDIR = 0x0020, 96 F_INACTIVE = 0x0040, 97 F_PASSWORD = 0x0080, 98 F_SECGROUP = 0x0100, 99 F_SHELL = 0x0200, 100 F_UID = 0x0400, 101 F_USERNAME = 0x0800, 102 F_CLASS = 0x1000, 103 F_SETSECGROUP = 0x4000 104 }; 105 106 #define CONFFILE "/etc/usermgmt.conf" 107 108 #ifndef DEF_GROUP 109 #define DEF_GROUP "users" 110 #endif 111 112 #ifndef DEF_BASEDIR 113 #define DEF_BASEDIR "/home" 114 #endif 115 116 #ifndef DEF_SKELDIR 117 #define DEF_SKELDIR "/etc/skel" 118 #endif 119 120 #ifndef DEF_SHELL 121 #define DEF_SHELL _PATH_KSHELL 122 #endif 123 124 #ifndef DEF_COMMENT 125 #define DEF_COMMENT "" 126 #endif 127 128 #ifndef DEF_LOWUID 129 #define DEF_LOWUID 1000 130 #endif 131 132 #ifndef DEF_HIGHUID 133 #define DEF_HIGHUID 60000 134 #endif 135 136 #ifndef DEF_INACTIVE 137 #define DEF_INACTIVE 0 138 #endif 139 140 #ifndef DEF_EXPIRE 141 #define DEF_EXPIRE NULL 142 #endif 143 144 #ifndef DEF_CLASS 145 #define DEF_CLASS "" 146 #endif 147 148 #ifndef WAITSECS 149 #define WAITSECS 10 150 #endif 151 152 #ifndef NOBODY_UID 153 #define NOBODY_UID 32767 154 #endif 155 156 /* some useful constants */ 157 enum { 158 MaxShellNameLen = 256, 159 MaxFileNameLen = MAXPATHLEN, 160 MaxUserNameLen = _PW_NAME_LEN, 161 MaxCommandLen = 2048, 162 PasswordLength = _PASSWORD_LEN, 163 164 DES_Len = 13, 165 166 LowGid = DEF_LOWUID, 167 HighGid = DEF_HIGHUID 168 }; 169 170 /* Full paths of programs used here */ 171 #define CHMOD "/bin/chmod" 172 #define CHOWN "/sbin/chown" 173 #define MKDIR "/bin/mkdir" 174 #define MV "/bin/mv" 175 #define NOLOGIN "/sbin/nologin" 176 #define PAX "/bin/pax" 177 #define RM "/bin/rm" 178 179 #define UNSET_INACTIVE "Null (unset)" 180 #define UNSET_EXPIRY "Null (unset)" 181 182 static int asystem(const char *fmt, ...) 183 __attribute__((__format__(__printf__, 1, 2))); 184 185 static int verbose; 186 187 /* if *cpp is non-null, free it, then assign `n' chars of `s' to it */ 188 static void 189 memsave(char **cpp, const char *s, size_t n) 190 { 191 if (*cpp != NULL) { 192 FREE(*cpp); 193 } 194 NEWARRAY(char, *cpp, n + 1, exit(1)); 195 (void) memcpy(*cpp, s, n); 196 (*cpp)[n] = '\0'; 197 } 198 199 /* a replacement for system(3) */ 200 static int 201 asystem(const char *fmt, ...) 202 { 203 va_list vp; 204 char buf[MaxCommandLen]; 205 int ret; 206 207 va_start(vp, fmt); 208 (void) vsnprintf(buf, sizeof(buf), fmt, vp); 209 va_end(vp); 210 if (verbose) { 211 (void) printf("Command: %s\n", buf); 212 } 213 if ((ret = system(buf)) != 0) { 214 warnx("[Warning] can't system `%s'", buf); 215 } 216 return ret; 217 } 218 219 /* remove a users home directory, returning 1 for success (ie, no problems encountered) */ 220 static int 221 removehomedir(const char *user, uid_t uid, const char *dir) 222 { 223 struct stat st; 224 225 /* userid not root? */ 226 if (uid == 0) { 227 warnx("Not deleting home directory `%s'; userid is 0", dir); 228 return 0; 229 } 230 231 /* directory exists (and is a directory!) */ 232 if (stat(dir, &st) < 0) { 233 warnx("Home directory `%s' doesn't exist", dir); 234 return 0; 235 } 236 if (!S_ISDIR(st.st_mode)) { 237 warnx("Home directory `%s' is not a directory", dir); 238 return 0; 239 } 240 241 /* userid matches directory owner? */ 242 if (st.st_uid != uid) { 243 warnx("User `%s' doesn't own directory `%s', not removed", 244 user, dir); 245 return 0; 246 } 247 248 (void) seteuid(uid); 249 /* we add the "|| true" to keep asystem() quiet if there is a non-zero exit status. */ 250 (void) asystem("%s -rf %s > /dev/null 2>&1 || true", RM, dir); 251 (void) seteuid(0); 252 if (rmdir(dir) < 0) { 253 warnx("Unable to remove all files in `%s'", dir); 254 return 0; 255 } 256 return 1; 257 } 258 259 /* return 1 if all of `s' is numeric */ 260 static int 261 is_number(char *s) 262 { 263 for ( ; *s ; s++) { 264 if (!isdigit((unsigned char) *s)) { 265 return 0; 266 } 267 } 268 return 1; 269 } 270 271 /* 272 * check that the effective uid is 0 - called from funcs which will 273 * modify data and config files. 274 */ 275 static void 276 checkeuid(void) 277 { 278 if (geteuid() != 0) { 279 errx(EXIT_FAILURE, "Program must be run as root"); 280 } 281 } 282 283 /* copy any dot files into the user's home directory */ 284 static int 285 copydotfiles(char *skeldir, uid_t uid, gid_t gid, char *dir) 286 { 287 struct dirent *dp; 288 DIR *dirp; 289 int n; 290 291 if ((dirp = opendir(skeldir)) == NULL) { 292 warn("can't open source . files dir `%s'", skeldir); 293 return 0; 294 } 295 for (n = 0; (dp = readdir(dirp)) != NULL && n == 0 ; ) { 296 if (strcmp(dp->d_name, ".") == 0 || 297 strcmp(dp->d_name, "..") == 0) { 298 continue; 299 } 300 n = 1; 301 } 302 (void) closedir(dirp); 303 if (n == 0) { 304 warnx("No \"dot\" initialisation files found"); 305 } else { 306 (void) asystem("cd %s && %s -rw -pe %s . %s", 307 skeldir, PAX, (verbose) ? "-v" : "", dir); 308 } 309 (void) asystem("%s -R -P %u:%u %s", CHOWN, uid, gid, dir); 310 (void) asystem("%s -R u+w %s", CHMOD, dir); 311 return n; 312 } 313 314 /* create a group entry with gid `gid' */ 315 static int 316 creategid(char *group, gid_t gid, const char *name) 317 { 318 struct stat st; 319 FILE *from; 320 FILE *to; 321 char *buf; 322 char f[MaxFileNameLen]; 323 int fd, ret; 324 int wroteit = 0; 325 size_t len; 326 327 if (getgrnam(group) != NULL) { 328 warnx("group `%s' already exists", group); 329 return 0; 330 } 331 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 332 warn("can't create gid for `%s': can't open `%s'", group, 333 _PATH_GROUP); 334 return 0; 335 } 336 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 337 warn("can't lock `%s'", _PATH_GROUP); 338 } 339 (void) fstat(fileno(from), &st); 340 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 341 if ((fd = mkstemp(f)) < 0) { 342 (void) fclose(from); 343 warn("can't create gid: mkstemp failed"); 344 return 0; 345 } 346 if ((to = fdopen(fd, "w")) == NULL) { 347 (void) fclose(from); 348 (void) close(fd); 349 (void) unlink(f); 350 warn("can't create gid: fdopen `%s' failed", f); 351 return 0; 352 } 353 while ((buf = fgetln(from, &len)) != NULL && len > 0) { 354 ret = 0; 355 if (buf[0] == '+' && wroteit == 0) { 356 ret = fprintf(to, "%s:*:%u:%s\n", group, gid, name); 357 wroteit = 1; 358 } 359 if (ret == -1 || 360 fprintf(to, "%*.*s", (int)len, (int)len, buf) != len) { 361 (void) fclose(from); 362 (void) fclose(to); 363 (void) unlink(f); 364 warn("can't create gid: short write to `%s'", f); 365 return 0; 366 } 367 } 368 ret = 0; 369 if (wroteit == 0) 370 ret = fprintf(to, "%s:*:%u:%s\n", group, gid, name); 371 (void) fclose(from); 372 if (fclose(to) == EOF || ret == -1) { 373 (void) unlink(f); 374 warn("can't create gid: short write to `%s'", f); 375 return 0; 376 } 377 if (rename(f, _PATH_GROUP) < 0) { 378 (void) unlink(f); 379 warn("can't create gid: can't rename `%s' to `%s'", f, 380 _PATH_GROUP); 381 return 0; 382 } 383 (void) chmod(_PATH_GROUP, st.st_mode & 07777); 384 syslog(LOG_INFO, "new group added: name=%s, gid=%d", group, gid); 385 return 1; 386 } 387 388 /* modify the group entry with name `group' to be newent */ 389 static int 390 modify_gid(char *group, char *newent) 391 { 392 struct stat st; 393 FILE *from; 394 FILE *to; 395 char buf[LINE_MAX]; 396 char f[MaxFileNameLen]; 397 char *colon; 398 int groupc; 399 int entc; 400 int fd; 401 int cc; 402 403 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 404 warn("can't modify gid for `%s': can't open `%s'", group, 405 _PATH_GROUP); 406 return 0; 407 } 408 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 409 warn("can't lock `%s'", _PATH_GROUP); 410 } 411 (void) fstat(fileno(from), &st); 412 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 413 if ((fd = mkstemp(f)) < 0) { 414 (void) fclose(from); 415 warn("can't modify gid: mkstemp failed"); 416 return 0; 417 } 418 if ((to = fdopen(fd, "w")) == NULL) { 419 (void) fclose(from); 420 (void) close(fd); 421 (void) unlink(f); 422 warn("can't modify gid: fdopen `%s' failed", f); 423 return 0; 424 } 425 groupc = strlen(group); 426 while (fgets(buf, sizeof(buf), from) != NULL) { 427 cc = strlen(buf); 428 if (cc > 0 && buf[cc - 1] != '\n' && !feof(from)) { 429 while (fgetc(from) != '\n' && !feof(from)) 430 cc++; 431 warnx("%s: line `%s' too long (%d bytes), skipping", 432 _PATH_GROUP, buf, cc); 433 continue; 434 } 435 if ((colon = strchr(buf, ':')) == NULL) { 436 /* 437 * The only valid entry with no column is the all-YP 438 * line. 439 */ 440 if (strcmp(buf, "+\n") != 0) { 441 warnx("badly formed entry `%.*s'", cc - 1, buf); 442 continue; 443 } 444 } else { 445 entc = (int)(colon - buf); 446 if (entc == groupc && strncmp(group, buf, entc) == 0) { 447 if (newent == NULL) { 448 continue; 449 } else { 450 cc = strlcpy(buf, newent, sizeof(buf)); 451 if (cc >= sizeof(buf)) { 452 warnx("group `%s' entry too long", 453 newent); 454 return (0); 455 } 456 } 457 } 458 } 459 if (fwrite(buf, cc, 1, to) != 1) { 460 (void) fclose(from); 461 (void) fclose(to); 462 (void) unlink(f); 463 warn("can't modify gid: short write to `%s'", f); 464 return 0; 465 } 466 } 467 (void) fclose(from); 468 if (fclose(to) == EOF) { 469 (void) unlink(f); 470 warn("can't modify gid: short write to `%s'", f); 471 return 0; 472 } 473 if (rename(f, _PATH_GROUP) < 0) { 474 (void) unlink(f); 475 warn("can't modify gid: can't rename `%s' to `%s'", f, _PATH_GROUP); 476 return 0; 477 } 478 (void) chmod(_PATH_GROUP, st.st_mode & 07777); 479 if (newent == NULL) { 480 syslog(LOG_INFO, "group deleted: name=%s", group); 481 } else { 482 syslog(LOG_INFO, "group information modified: name=%s", group); 483 } 484 return 1; 485 } 486 487 /* modify the group entries for all `groups', by adding `user' */ 488 static int 489 append_group(char *user, int ngroups, const char **groups) 490 { 491 struct group *grp; 492 struct passwd *pwp; 493 struct stat st; 494 FILE *from; 495 FILE *to; 496 char buf[LINE_MAX]; 497 char f[MaxFileNameLen]; 498 char *colon; 499 char *ugid = NULL; 500 int fd; 501 int cc; 502 int i; 503 int j; 504 505 if ((pwp = getpwnam(user))) { 506 if ((ugid = group_from_gid(pwp->pw_gid, 1)) == NULL) { 507 warnx("can't get primary group for user `%s'", user); 508 return 0; 509 } 510 } 511 512 for (i = 0 ; i < ngroups ; i++) { 513 if ((grp = getgrnam(groups[i])) == NULL) { 514 warnx("can't append group `%s' for user `%s'", 515 groups[i], user); 516 } else { 517 for (j = 0 ; grp->gr_mem[j] ; j++) { 518 if (strcmp(user, grp->gr_mem[j]) == 0) { 519 /* already in it */ 520 groups[i] = ""; 521 } 522 } 523 } 524 } 525 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 526 warn("can't append group for `%s': can't open `%s'", user, 527 _PATH_GROUP); 528 return 0; 529 } 530 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 531 warn("can't lock `%s'", _PATH_GROUP); 532 } 533 (void) fstat(fileno(from), &st); 534 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 535 if ((fd = mkstemp(f)) < 0) { 536 (void) fclose(from); 537 warn("can't append group: mkstemp failed"); 538 return 0; 539 } 540 if ((to = fdopen(fd, "w")) == NULL) { 541 (void) fclose(from); 542 (void) close(fd); 543 (void) unlink(f); 544 warn("can't append group: fdopen `%s' failed", f); 545 return 0; 546 } 547 while (fgets(buf, sizeof(buf), from) != NULL) { 548 cc = strlen(buf); 549 if (cc > 0 && buf[cc - 1] != '\n' && !feof(from)) { 550 while (fgetc(from) != '\n' && !feof(from)) 551 cc++; 552 warnx("%s: line `%s' too long (%d bytes), skipping", 553 _PATH_GROUP, buf, cc); 554 continue; 555 } 556 if ((colon = strchr(buf, ':')) == NULL) { 557 warnx("badly formed entry `%s'", buf); 558 continue; 559 } 560 for (i = 0 ; i < ngroups ; i++) { 561 j = (int)(colon - buf); 562 if (ugid) { 563 if (strcmp(ugid, groups[i]) == 0) { 564 /* user's primary group, no need to append */ 565 groups[i] = ""; 566 } 567 } 568 if (strncmp(groups[i], buf, j) == 0 && 569 groups[i][j] == '\0') { 570 while (isspace(buf[cc - 1])) 571 cc--; 572 buf[(j = cc)] = '\0'; 573 if (buf[strlen(buf) - 1] != ':') 574 strlcat(buf, ",", sizeof(buf)); 575 cc = strlcat(buf, user, sizeof(buf)) + 1; 576 if (cc >= sizeof(buf)) { 577 warnx("Warning: group `%s' would " 578 "become too long, not modifying", 579 groups[i]); 580 cc = j + 1; 581 } 582 buf[cc - 1] = '\n'; 583 buf[cc] = '\0'; 584 } 585 } 586 if (fwrite(buf, cc, 1, to) != 1) { 587 (void) fclose(from); 588 (void) fclose(to); 589 (void) unlink(f); 590 warn("can't append group: short write to `%s'", f); 591 return 0; 592 } 593 } 594 (void) fclose(from); 595 if (fclose(to) == EOF) { 596 (void) unlink(f); 597 warn("can't append group: short write to `%s'", f); 598 return 0; 599 } 600 if (rename(f, _PATH_GROUP) < 0) { 601 (void) unlink(f); 602 warn("can't append group: can't rename `%s' to `%s'", f, _PATH_GROUP); 603 return 0; 604 } 605 (void) chmod(_PATH_GROUP, st.st_mode & 07777); 606 return 1; 607 } 608 609 /* return 1 if `login' is a valid login name */ 610 static int 611 valid_login(char *login_name) 612 { 613 unsigned char *cp; 614 615 /* The first character cannot be a hyphen */ 616 if (*login_name == '-') 617 return 0; 618 619 for (cp = login_name ; *cp ; cp++) { 620 /* We allow '$' as the last character for samba */ 621 if (!isalnum(*cp) && *cp != '.' && *cp != '_' && *cp != '-' && 622 !(*cp == '$' && *(cp + 1) == '\0')) { 623 return 0; 624 } 625 } 626 if ((char *)cp - login_name > MaxUserNameLen) 627 return 0; 628 return 1; 629 } 630 631 /* return 1 if `group' is a valid group name */ 632 static int 633 valid_group(char *group) 634 { 635 unsigned char *cp; 636 637 for (cp = group ; *cp ; cp++) { 638 if (!isalnum(*cp) && *cp != '.' && *cp != '_' && *cp != '-') { 639 return 0; 640 } 641 } 642 if ((char *)cp - group > MaxUserNameLen) 643 return 0; 644 return 1; 645 } 646 647 /* return 1 if `class' exists */ 648 static int 649 valid_class(char *class) 650 { 651 login_cap_t *lc; 652 653 if ((lc = login_getclass(class)) != NULL) 654 login_close(lc); 655 return lc != NULL; 656 } 657 658 /* find the next gid in the range lo .. hi */ 659 static int 660 getnextgid(uid_t *gidp, uid_t lo, uid_t hi) 661 { 662 for (*gidp = lo ; *gidp < hi ; *gidp += 1) { 663 if (getgrgid((gid_t)*gidp) == NULL) { 664 return 1; 665 } 666 } 667 return 0; 668 } 669 670 /* save a range of uids */ 671 static int 672 save_range(user_t *up, char *cp) 673 { 674 int from; 675 int to; 676 int i; 677 678 if (up->u_rsize == 0) { 679 up->u_rsize = 32; 680 NEWARRAY(range_t, up->u_rv, up->u_rsize, return(0)); 681 } else if (up->u_rc == up->u_rsize) { 682 up->u_rsize *= 2; 683 RENEW(range_t, up->u_rv, up->u_rsize, return(0)); 684 } 685 if (up->u_rv && sscanf(cp, "%d..%d", &from, &to) == 2) { 686 for (i = up->u_defrc ; i < up->u_rc ; i++) { 687 if (up->u_rv[i].r_from == from && up->u_rv[i].r_to == to) { 688 break; 689 } 690 } 691 if (i == up->u_rc) { 692 up->u_rv[up->u_rc].r_from = from; 693 up->u_rv[up->u_rc].r_to = to; 694 up->u_rc += 1; 695 } 696 } else { 697 warnx("Bad range `%s'", cp); 698 return 0; 699 } 700 return 1; 701 } 702 703 /* set the defaults in the defaults file */ 704 static int 705 setdefaults(user_t *up) 706 { 707 char template[MaxFileNameLen]; 708 FILE *fp; 709 int ret; 710 int fd; 711 int i; 712 713 (void) snprintf(template, sizeof(template), "%s.XXXXXXXX", CONFFILE); 714 if ((fd = mkstemp(template)) < 0) { 715 warnx("can't mkstemp `%s' for writing", CONFFILE); 716 return 0; 717 } 718 if ((fp = fdopen(fd, "w")) == NULL) { 719 warn("can't fdopen `%s' for writing", CONFFILE); 720 return 0; 721 } 722 ret = 1; 723 if (fprintf(fp, "group\t\t%s\n", up->u_primgrp) <= 0 || 724 fprintf(fp, "base_dir\t%s\n", up->u_basedir) <= 0 || 725 fprintf(fp, "skel_dir\t%s\n", up->u_skeldir) <= 0 || 726 fprintf(fp, "shell\t\t%s\n", up->u_shell) <= 0 || 727 fprintf(fp, "class\t\t%s\n", up->u_class) <= 0 || 728 fprintf(fp, "inactive\t%s\n", (up->u_inactive == NULL) ? UNSET_INACTIVE : up->u_inactive) <= 0 || 729 fprintf(fp, "expire\t\t%s\n", (up->u_expire == NULL) ? UNSET_EXPIRY : up->u_expire) <= 0 || 730 fprintf(fp, "preserve\t%s\n", (up->u_preserve == 0) ? "false" : "true") <= 0) { 731 warn("can't write to `%s'", CONFFILE); 732 ret = 0; 733 } 734 for (i = (up->u_defrc != up->u_rc) ? up->u_defrc : 0 ; i < up->u_rc ; i++) { 735 if (fprintf(fp, "range\t\t%d..%d\n", up->u_rv[i].r_from, up->u_rv[i].r_to) <= 0) { 736 warn("can't write to `%s'", CONFFILE); 737 ret = 0; 738 } 739 } 740 if (fclose(fp) == EOF) { 741 warn("can't write to `%s'", CONFFILE); 742 ret = 0; 743 } 744 if (ret) { 745 ret = ((rename(template, CONFFILE) == 0) && (chmod(CONFFILE, 0644) == 0)); 746 } 747 return ret; 748 } 749 750 /* read the defaults file */ 751 static void 752 read_defaults(user_t *up) 753 { 754 struct stat st; 755 size_t lineno; 756 size_t len; 757 FILE *fp; 758 unsigned char *cp; 759 unsigned char *s; 760 761 memsave(&up->u_primgrp, DEF_GROUP, strlen(DEF_GROUP)); 762 memsave(&up->u_basedir, DEF_BASEDIR, strlen(DEF_BASEDIR)); 763 memsave(&up->u_skeldir, DEF_SKELDIR, strlen(DEF_SKELDIR)); 764 memsave(&up->u_shell, DEF_SHELL, strlen(DEF_SHELL)); 765 memsave(&up->u_comment, DEF_COMMENT, strlen(DEF_COMMENT)); 766 memsave(&up->u_class, DEF_CLASS, strlen(DEF_CLASS)); 767 up->u_rsize = 16; 768 up->u_defrc = 0; 769 NEWARRAY(range_t, up->u_rv, up->u_rsize, exit(1)); 770 up->u_inactive = DEF_INACTIVE; 771 up->u_expire = DEF_EXPIRE; 772 if ((fp = fopen(CONFFILE, "r")) == NULL) { 773 if (stat(CONFFILE, &st) < 0 && !setdefaults(up)) { 774 warn("can't create `%s' defaults file", CONFFILE); 775 } 776 fp = fopen(CONFFILE, "r"); 777 } 778 if (fp != NULL) { 779 while ((s = fparseln(fp, &len, &lineno, NULL, 0)) != NULL) { 780 if (strncmp(s, "group", 5) == 0) { 781 for (cp = s + 5 ; isspace(*cp) ; cp++) { 782 } 783 memsave(&up->u_primgrp, cp, strlen(cp)); 784 } else if (strncmp(s, "base_dir", 8) == 0) { 785 for (cp = s + 8 ; isspace(*cp) ; cp++) { 786 } 787 memsave(&up->u_basedir, cp, strlen(cp)); 788 } else if (strncmp(s, "skel_dir", 8) == 0) { 789 for (cp = s + 8 ; isspace(*cp) ; cp++) { 790 } 791 memsave(&up->u_skeldir, cp, strlen(cp)); 792 } else if (strncmp(s, "shell", 5) == 0) { 793 for (cp = s + 5 ; isspace(*cp) ; cp++) { 794 } 795 memsave(&up->u_shell, cp, strlen(cp)); 796 } else if (strncmp(s, "password", 8) == 0) { 797 for (cp = s + 8 ; isspace(*cp) ; cp++) { 798 } 799 memsave(&up->u_password, cp, strlen(cp)); 800 } else if (strncmp(s, "class", 5) == 0) { 801 for (cp = s + 5 ; isspace(*cp) ; cp++) { 802 } 803 memsave(&up->u_class, cp, strlen(cp)); 804 } else if (strncmp(s, "inactive", 8) == 0) { 805 for (cp = s + 8 ; isspace(*cp) ; cp++) { 806 } 807 if (strcmp(cp, UNSET_INACTIVE) == 0) { 808 if (up->u_inactive) { 809 FREE(up->u_inactive); 810 } 811 up->u_inactive = NULL; 812 } else { 813 memsave(&up->u_inactive, cp, strlen(cp)); 814 } 815 } else if (strncmp(s, "range", 5) == 0) { 816 for (cp = s + 5 ; isspace(*cp) ; cp++) { 817 } 818 (void) save_range(up, cp); 819 } else if (strncmp(s, "preserve", 8) == 0) { 820 for (cp = s + 8 ; isspace(*cp) ; cp++) { 821 } 822 up->u_preserve = (strncmp(cp, "true", 4) == 0) ? 1 : 823 (strncmp(cp, "yes", 3) == 0) ? 1 : 824 atoi(cp); 825 } else if (strncmp(s, "expire", 6) == 0) { 826 for (cp = s + 6 ; isspace(*cp) ; cp++) { 827 } 828 if (strcmp(cp, UNSET_EXPIRY) == 0) { 829 if (up->u_expire) { 830 FREE(up->u_expire); 831 } 832 up->u_expire = NULL; 833 } else { 834 memsave(&up->u_expire, cp, strlen(cp)); 835 } 836 } 837 (void) free(s); 838 } 839 (void) fclose(fp); 840 } 841 if (up->u_rc == 0) { 842 up->u_rv[up->u_rc].r_from = DEF_LOWUID; 843 up->u_rv[up->u_rc].r_to = DEF_HIGHUID; 844 up->u_rc += 1; 845 } 846 up->u_defrc = up->u_rc; 847 } 848 849 /* return the next valid unused uid */ 850 static int 851 getnextuid(int sync_uid_gid, uid_t *uid, uid_t low_uid, uid_t high_uid) 852 { 853 for (*uid = low_uid ; *uid <= high_uid ; (*uid)++) { 854 if (getpwuid((uid_t)(*uid)) == NULL && *uid != NOBODY_UID) { 855 if (sync_uid_gid) { 856 if (getgrgid((gid_t)(*uid)) == NULL) { 857 return 1; 858 } 859 } else { 860 return 1; 861 } 862 } 863 } 864 return 0; 865 } 866 867 /* structure which defines a password type */ 868 typedef struct passwd_type_t { 869 const char *type; /* optional type descriptor */ 870 int desc_length; /* length of type descriptor */ 871 int length; /* length of password */ 872 } passwd_type_t; 873 874 #define BLF "$2a" 875 #define MD5 "$1" 876 #define DES "" 877 878 static passwd_type_t passwd_types[] = { 879 { BLF, 3, 54 }, /* Blowfish */ 880 { MD5, 2, 34 }, /* MD5 */ 881 { DES, 0, DES_Len }, /* standard DES */ 882 { NULL, -1, -1 } /* none - terminate search */ 883 }; 884 885 /* return non-zero if it's a valid password - check length for cipher type */ 886 static int 887 valid_password_length(char *newpasswd) 888 { 889 passwd_type_t *pwtp; 890 891 for (pwtp = passwd_types ; pwtp->desc_length >= 0 ; pwtp++) { 892 if (strncmp(newpasswd, pwtp->type, pwtp->desc_length) == 0) { 893 char *p; 894 895 if (strcmp(pwtp->type, BLF) != 0) { 896 return strlen(newpasswd) == pwtp->length; 897 } 898 /* Skip first three `$'. */ 899 if ((p = strchr(newpasswd, '$')) == NULL || 900 *(++p) == '$' || (p = strchr(p, '$')) == NULL || 901 *(++p) == '$' || (p = strchr(p, '$')) == NULL) 902 continue; 903 return (strlen(p) - 1); 904 } 905 } 906 return 0; 907 } 908 909 /* look for a valid time, return 0 if it was specified but bad */ 910 static int 911 scantime(time_t *tp, char *s) 912 { 913 struct tm tm; 914 915 *tp = 0; 916 if (s != NULL) { 917 (void) memset(&tm, 0, sizeof(tm)); 918 tm.tm_isdst = -1; 919 if (strptime(s, "%c", &tm) != NULL) { 920 *tp = mktime(&tm); 921 } else if (strptime(s, "%B %d %Y", &tm) != NULL) { 922 *tp = mktime(&tm); 923 } else if (isdigit((unsigned char) s[0]) != 0) { 924 *tp = atoi(s); 925 } else { 926 return 0; 927 } 928 } 929 return 1; 930 } 931 932 /* compute the extra length '&' expansion consumes */ 933 static size_t 934 expand_len(const char *p, const char *username) 935 { 936 size_t alen; 937 size_t ulen; 938 939 ulen = strlen(username); 940 for (alen = 0; *p != '\0'; p++) 941 if (*p == '&') 942 alen += ulen - 1; 943 return alen; 944 } 945 946 /* add a user */ 947 static int 948 adduser(char *login_name, user_t *up) 949 { 950 struct group *grp; 951 struct stat st; 952 time_t expire; 953 time_t inactive; 954 char password[PasswordLength + 1]; 955 char home[MaxFileNameLen]; 956 char buf[LINE_MAX]; 957 int sync_uid_gid; 958 int masterfd; 959 int ptmpfd; 960 gid_t gid; 961 int cc; 962 int i, yp = 0; 963 FILE *fp; 964 965 if (!valid_login(login_name)) { 966 errx(EXIT_FAILURE, "`%s' is not a valid login name", login_name); 967 } 968 if (!valid_class(up->u_class)) { 969 errx(EXIT_FAILURE, "No such login class `%s'", up->u_class); 970 } 971 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 972 err(EXIT_FAILURE, "can't open `%s'", _PATH_MASTERPASSWD); 973 } 974 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 975 err(EXIT_FAILURE, "can't lock `%s'", _PATH_MASTERPASSWD); 976 } 977 pw_init(); 978 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 979 (void) close(masterfd); 980 err(EXIT_FAILURE, "can't obtain pw_lock"); 981 } 982 if ((fp = fdopen(masterfd, "r")) == NULL) { 983 (void) close(masterfd); 984 (void) close(ptmpfd); 985 pw_abort(); 986 err(EXIT_FAILURE, "can't fdopen `%s' for reading", 987 _PATH_MASTERPASSWD); 988 } 989 while (fgets(buf, sizeof(buf), fp) != NULL) { 990 cc = strlen(buf); 991 /* 992 * Stop copying the file at the yp entry; we want to 993 * put the new user before it, and preserve entries 994 * after the yp entry. 995 */ 996 if (cc > 1 && buf[0] == '+' && buf[1] == ':') { 997 yp = 1; 998 break; 999 } 1000 if (write(ptmpfd, buf, (size_t)(cc)) != cc) { 1001 (void) fclose(fp); 1002 (void) close(ptmpfd); 1003 pw_abort(); 1004 err(EXIT_FAILURE, "short write to /etc/ptmp (not %d chars)", cc); 1005 } 1006 } 1007 if (ferror(fp)) { 1008 (void) fclose(fp); 1009 (void) close(ptmpfd); 1010 pw_abort(); 1011 err(EXIT_FAILURE, "read error on %s", _PATH_MASTERPASSWD); 1012 } 1013 /* if no uid was specified, get next one in [low_uid..high_uid] range */ 1014 sync_uid_gid = (strcmp(up->u_primgrp, "=uid") == 0); 1015 if (up->u_uid == UID_MAX) { 1016 int got_id = 0; 1017 1018 /* 1019 * Look for a free UID in the command line ranges (if any). 1020 * These start after the ranges specified in the config file. 1021 */ 1022 for (i = up->u_defrc; got_id == 0 && i < up->u_rc ; i++) { 1023 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1024 up->u_rv[i].r_from, up->u_rv[i].r_to); 1025 } 1026 /* 1027 * If there were no free UIDs in the command line ranges, 1028 * try the ranges from the config file (there will always 1029 * be at least one default). 1030 */ 1031 if (got_id == 0) { 1032 for (i = 0; got_id == 0 && i < up->u_defrc; i++) { 1033 got_id = getnextuid(sync_uid_gid, &up->u_uid, 1034 up->u_rv[i].r_from, up->u_rv[i].r_to); 1035 } 1036 } 1037 if (got_id == 0) { 1038 (void) close(ptmpfd); 1039 pw_abort(); 1040 errx(EXIT_FAILURE, "can't get next uid for %u", up->u_uid); 1041 } 1042 } 1043 /* check uid isn't already allocated */ 1044 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1045 (void) close(ptmpfd); 1046 pw_abort(); 1047 errx(EXIT_FAILURE, "uid %u is already in use", up->u_uid); 1048 } 1049 /* if -g=uid was specified, check gid is unused */ 1050 if (sync_uid_gid) { 1051 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1052 (void) close(ptmpfd); 1053 pw_abort(); 1054 errx(EXIT_FAILURE, "gid %u is already in use", up->u_uid); 1055 } 1056 gid = up->u_uid; 1057 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1058 gid = grp->gr_gid; 1059 } else if (is_number(up->u_primgrp) && 1060 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1061 gid = grp->gr_gid; 1062 } else { 1063 (void) close(ptmpfd); 1064 pw_abort(); 1065 errx(EXIT_FAILURE, "group %s not found", up->u_primgrp); 1066 } 1067 /* check name isn't already in use */ 1068 if (!(up->u_flags & F_DUPUID) && getpwnam(login_name) != NULL) { 1069 (void) close(ptmpfd); 1070 pw_abort(); 1071 errx(EXIT_FAILURE, "already a `%s' user", login_name); 1072 } 1073 if (up->u_flags & F_HOMEDIR) { 1074 if (strlcpy(home, up->u_home, sizeof(home)) >= sizeof(home)) { 1075 (void) close(ptmpfd); 1076 pw_abort(); 1077 errx(EXIT_FAILURE, "home directory `%s' too long", 1078 up->u_home); 1079 } 1080 } else { 1081 /* if home directory hasn't been given, make it up */ 1082 if (snprintf(home, sizeof(home), "%s/%s", up->u_basedir, 1083 login_name) >= sizeof(home)) { 1084 (void) close(ptmpfd); 1085 pw_abort(); 1086 errx(EXIT_FAILURE, "home directory `%s/%s' too long", 1087 up->u_basedir, login_name); 1088 } 1089 } 1090 if (!scantime(&inactive, up->u_inactive)) { 1091 warnx("Warning: inactive time `%s' invalid, password expiry off", 1092 up->u_inactive); 1093 } 1094 if (!scantime(&expire, up->u_expire)) { 1095 warnx("Warning: expire time `%s' invalid, account expiry off", 1096 up->u_expire); 1097 } 1098 if (lstat(home, &st) < 0 && !(up->u_flags & F_MKDIR) && 1099 strcmp(home, _PATH_NONEXISTENT) != 0) { 1100 warnx("Warning: home directory `%s' doesn't exist, and -m was" 1101 " not specified", home); 1102 } 1103 if (up->u_password != NULL && valid_password_length(up->u_password)) { 1104 (void) strlcpy(password, up->u_password, sizeof(password)); 1105 } else { 1106 (void) memset(password, '*', DES_Len); 1107 password[DES_Len] = 0; 1108 if (up->u_password != NULL) { 1109 warnx("Password `%s' is invalid: setting it to `%s'", 1110 up->u_password, password); 1111 } 1112 } 1113 cc = snprintf(buf, sizeof(buf), "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1114 login_name, 1115 password, 1116 up->u_uid, 1117 gid, 1118 up->u_class, 1119 (long) inactive, 1120 (long) expire, 1121 up->u_comment, 1122 home, 1123 up->u_shell); 1124 if (cc >= sizeof(buf) || cc < 0 || 1125 cc + expand_len(up->u_comment, login_name) >= 1023) { 1126 (void) close(ptmpfd); 1127 pw_abort(); 1128 errx(EXIT_FAILURE, "can't add `%s', line too long", buf); 1129 } 1130 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1131 (void) close(ptmpfd); 1132 pw_abort(); 1133 err(EXIT_FAILURE, "can't add `%s'", buf); 1134 } 1135 if (yp) { 1136 /* put back the + line */ 1137 cc = snprintf(buf, sizeof(buf), "+:*::::::::\n"); 1138 if (cc == -1 || cc >= sizeof(buf)) { 1139 (void) close(ptmpfd); 1140 pw_abort(); 1141 errx(EXIT_FAILURE, "can't add `%s', line too long", buf); 1142 } 1143 if (write(ptmpfd, buf, (size_t) cc) != cc) { 1144 (void) close(ptmpfd); 1145 pw_abort(); 1146 err(EXIT_FAILURE, "can't add `%s'", buf); 1147 } 1148 /* copy the entries following it, if any */ 1149 while (fgets(buf, sizeof(buf), fp) != NULL) { 1150 cc = strlen(buf); 1151 if (write(ptmpfd, buf, (size_t)(cc)) != cc) { 1152 (void) fclose(fp); 1153 (void) close(ptmpfd); 1154 pw_abort(); 1155 err(EXIT_FAILURE, "short write to /etc/ptmp (not %d chars)", cc); 1156 } 1157 } 1158 if (ferror(fp)) { 1159 (void) fclose(fp); 1160 (void) close(ptmpfd); 1161 pw_abort(); 1162 err(EXIT_FAILURE, "read error on %s", _PATH_MASTERPASSWD); 1163 } 1164 } 1165 if (up->u_flags & F_MKDIR) { 1166 if (lstat(home, &st) == 0) { 1167 (void) close(ptmpfd); 1168 pw_abort(); 1169 errx(EXIT_FAILURE, "home directory `%s' already exists", 1170 home); 1171 } else { 1172 if (asystem("%s -p %s", MKDIR, home) != 0) { 1173 (void) close(ptmpfd); 1174 pw_abort(); 1175 err(EXIT_FAILURE, "can't mkdir `%s'", home); 1176 } 1177 (void) copydotfiles(up->u_skeldir, up->u_uid, gid, home); 1178 } 1179 } 1180 if (strcmp(up->u_primgrp, "=uid") == 0 && 1181 getgrnam(login_name) == NULL && 1182 !creategid(login_name, gid, "")) { 1183 (void) close(ptmpfd); 1184 pw_abort(); 1185 errx(EXIT_FAILURE, "can't create gid %d for login name %s", 1186 gid, login_name); 1187 } 1188 if (up->u_groupc > 0 && !append_group(login_name, up->u_groupc, up->u_groupv)) { 1189 (void) close(ptmpfd); 1190 pw_abort(); 1191 errx(EXIT_FAILURE, "can't append `%s' to new groups", login_name); 1192 } 1193 (void) close(ptmpfd); 1194 if (pw_mkdb(yp ? NULL : login_name, 0) < 0) { 1195 pw_abort(); 1196 err(EXIT_FAILURE, "pw_mkdb failed"); 1197 } 1198 syslog(LOG_INFO, "new user added: name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1199 login_name, up->u_uid, gid, home, up->u_shell); 1200 return 1; 1201 } 1202 1203 /* remove a user from the groups file */ 1204 static int 1205 rm_user_from_groups(char *login_name) 1206 { 1207 struct stat st; 1208 size_t login_len; 1209 FILE *from; 1210 FILE *to; 1211 char buf[LINE_MAX]; 1212 char f[MaxFileNameLen]; 1213 char *cp, *ep; 1214 int fd; 1215 int cc; 1216 1217 login_len = strlen(login_name); 1218 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 1219 warn("can't remove gid for `%s': can't open `%s'", 1220 login_name, _PATH_GROUP); 1221 return 0; 1222 } 1223 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 1224 warn("can't lock `%s'", _PATH_GROUP); 1225 } 1226 (void) fstat(fileno(from), &st); 1227 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 1228 if ((fd = mkstemp(f)) < 0) { 1229 (void) fclose(from); 1230 warn("can't remove gid for `%s': mkstemp failed", login_name); 1231 return 0; 1232 } 1233 if ((to = fdopen(fd, "w")) == NULL) { 1234 (void) fclose(from); 1235 (void) close(fd); 1236 (void) unlink(f); 1237 warn("can't remove gid for `%s': fdopen `%s' failed", 1238 login_name, f); 1239 return 0; 1240 } 1241 while (fgets(buf, sizeof(buf), from) != NULL) { 1242 cc = strlen(buf); 1243 if (cc > 0 && buf[cc - 1] != '\n' && !feof(from)) { 1244 while (fgetc(from) != '\n' && !feof(from)) 1245 cc++; 1246 warnx("%s: line `%s' too long (%d bytes), skipping", 1247 _PATH_GROUP, buf, cc); 1248 continue; 1249 } 1250 1251 /* Break out the group list. */ 1252 for (cp = buf, cc = 0; *cp != '\0' && cc < 3; cp++) { 1253 if (*cp == ':') 1254 cc++; 1255 } 1256 if (cc != 3) { 1257 buf[strcspn(buf, "\n")] = '\0'; 1258 warnx("Malformed entry `%s'. Skipping", buf); 1259 continue; 1260 } 1261 while ((cp = strstr(cp, login_name)) != NULL) { 1262 if ((cp[-1] == ':' || cp[-1] == ',') && 1263 (cp[login_len] == ',' || cp[login_len] == '\n')) { 1264 ep = cp + login_len; 1265 if (cp[login_len] == ',') 1266 ep++; 1267 else if (cp[-1] == ',') 1268 cp--; 1269 memmove(cp, ep, strlen(ep) + 1); 1270 } else { 1271 if ((cp = strchr(cp, ',')) == NULL) 1272 break; 1273 cp++; 1274 } 1275 } 1276 if (fwrite(buf, strlen(buf), 1, to) != 1) { 1277 (void) fclose(from); 1278 (void) fclose(to); 1279 (void) unlink(f); 1280 warn("can't remove gid for `%s': short write to `%s'", 1281 login_name, f); 1282 return 0; 1283 } 1284 } 1285 (void) fchmod(fileno(to), st.st_mode & 07777); 1286 (void) fclose(from); 1287 if (fclose(to) == EOF) { 1288 (void) unlink(f); 1289 warn("can't remove gid for `%s': short write to `%s'", 1290 login_name, f); 1291 return 0; 1292 } 1293 if (rename(f, _PATH_GROUP) < 0) { 1294 (void) unlink(f); 1295 warn("can't remove gid for `%s': can't rename `%s' to `%s'", 1296 login_name, f, _PATH_GROUP); 1297 return 0; 1298 } 1299 return 1; 1300 } 1301 1302 /* check that the user or group is local, not from YP/NIS */ 1303 static int 1304 is_local(char *name, const char *file) 1305 { 1306 FILE *fp; 1307 char buf[LINE_MAX]; 1308 size_t len; 1309 int ret; 1310 int cc; 1311 1312 if ((fp = fopen(file, "r")) == NULL) { 1313 err(EXIT_FAILURE, "can't open `%s'", file); 1314 } 1315 len = strlen(name); 1316 for (ret = 0 ; fgets(buf, sizeof(buf), fp) != NULL ; ) { 1317 cc = strlen(buf); 1318 if (cc > 0 && buf[cc - 1] != '\n' && !feof(fp)) { 1319 while (fgetc(fp) != '\n' && !feof(fp)) 1320 cc++; 1321 warnx("%s: line `%s' too long (%d bytes), skipping", 1322 file, buf, cc); 1323 continue; 1324 } 1325 if (strncmp(buf, name, len) == 0 && buf[len] == ':') { 1326 ret = 1; 1327 break; 1328 } 1329 } 1330 (void) fclose(fp); 1331 return ret; 1332 } 1333 1334 /* modify a user */ 1335 static int 1336 moduser(char *login_name, char *newlogin, user_t *up) 1337 { 1338 struct passwd *pwp; 1339 struct group *grp; 1340 const char *homedir; 1341 char buf[LINE_MAX]; 1342 size_t colonc, loginc; 1343 size_t cc; 1344 FILE *master; 1345 char newdir[MaxFileNameLen]; 1346 char *colon; 1347 int len; 1348 int masterfd; 1349 int ptmpfd; 1350 int rval; 1351 int i; 1352 1353 if (!valid_login(newlogin)) { 1354 errx(EXIT_FAILURE, "`%s' is not a valid login name", login_name); 1355 } 1356 if ((pwp = getpwnam(login_name)) == NULL) { 1357 errx(EXIT_FAILURE, "No such user `%s'", login_name); 1358 } 1359 if (!is_local(login_name, _PATH_MASTERPASSWD)) { 1360 errx(EXIT_FAILURE, "User `%s' must be a local user", login_name); 1361 } 1362 /* keep dir name in case we need it for '-m' */ 1363 homedir = pwp->pw_dir; 1364 1365 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 1366 err(EXIT_FAILURE, "can't open `%s'", _PATH_MASTERPASSWD); 1367 } 1368 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 1369 err(EXIT_FAILURE, "can't lock `%s'", _PATH_MASTERPASSWD); 1370 } 1371 pw_init(); 1372 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 1373 (void) close(masterfd); 1374 err(EXIT_FAILURE, "can't obtain pw_lock"); 1375 } 1376 if ((master = fdopen(masterfd, "r")) == NULL) { 1377 (void) close(masterfd); 1378 (void) close(ptmpfd); 1379 pw_abort(); 1380 err(EXIT_FAILURE, "can't fdopen fd for %s", _PATH_MASTERPASSWD); 1381 } 1382 if (up != NULL) { 1383 if (up->u_flags & F_USERNAME) { 1384 /* if changing name, check new name isn't already in use */ 1385 if (strcmp(login_name, newlogin) != 0 && getpwnam(newlogin) != NULL) { 1386 (void) close(ptmpfd); 1387 pw_abort(); 1388 errx(EXIT_FAILURE, "already a `%s' user", newlogin); 1389 } 1390 pwp->pw_name = newlogin; 1391 1392 /* 1393 * Provide a new directory name in case the 1394 * home directory is to be moved. 1395 */ 1396 if (up->u_flags & F_MKDIR) { 1397 (void) snprintf(newdir, sizeof(newdir), 1398 "%s/%s", up->u_basedir, newlogin); 1399 pwp->pw_dir = newdir; 1400 } 1401 } 1402 if (up->u_flags & F_PASSWORD) { 1403 if (up->u_password != NULL) { 1404 if (!valid_password_length(up->u_password)) { 1405 (void) close(ptmpfd); 1406 pw_abort(); 1407 errx(EXIT_FAILURE, "Invalid password: `%s'", 1408 up->u_password); 1409 } 1410 pwp->pw_passwd = up->u_password; 1411 } 1412 } 1413 if (up->u_flags & F_UID) { 1414 /* check uid isn't already allocated */ 1415 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1416 (void) close(ptmpfd); 1417 pw_abort(); 1418 errx(EXIT_FAILURE, "uid %u is already in use", up->u_uid); 1419 } 1420 pwp->pw_uid = up->u_uid; 1421 } 1422 if (up->u_flags & F_GROUP) { 1423 /* if -g=uid was specified, check gid is unused */ 1424 if (strcmp(up->u_primgrp, "=uid") == 0) { 1425 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1426 (void) close(ptmpfd); 1427 pw_abort(); 1428 errx(EXIT_FAILURE, "gid %u is already in use", up->u_uid); 1429 } 1430 pwp->pw_gid = up->u_uid; 1431 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1432 pwp->pw_gid = grp->gr_gid; 1433 } else if (is_number(up->u_primgrp) && 1434 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1435 pwp->pw_gid = grp->gr_gid; 1436 } else { 1437 (void) close(ptmpfd); 1438 pw_abort(); 1439 errx(EXIT_FAILURE, "group %s not found", up->u_primgrp); 1440 } 1441 } 1442 if (up->u_flags & F_INACTIVE) { 1443 if (!scantime(&pwp->pw_change, up->u_inactive)) { 1444 warnx("Warning: inactive time `%s' invalid, password expiry off", 1445 up->u_inactive); 1446 } 1447 } 1448 if (up->u_flags & F_EXPIRE) { 1449 if (!scantime(&pwp->pw_expire, up->u_expire)) { 1450 warnx("Warning: expire time `%s' invalid, account expiry off", 1451 up->u_expire); 1452 } 1453 } 1454 if (up->u_flags & F_COMMENT) 1455 pwp->pw_gecos = up->u_comment; 1456 if (up->u_flags & F_HOMEDIR) 1457 pwp->pw_dir = up->u_home; 1458 if (up->u_flags & F_SHELL) 1459 pwp->pw_shell = up->u_shell; 1460 if (up->u_flags & F_CLASS) { 1461 if (!valid_class(up->u_class)) { 1462 (void) close(ptmpfd); 1463 pw_abort(); 1464 errx(EXIT_FAILURE, 1465 "No such login class `%s'", up->u_class); 1466 } 1467 pwp->pw_class = up->u_class; 1468 } 1469 } 1470 loginc = strlen(login_name); 1471 while (fgets(buf, sizeof(buf), master) != NULL) { 1472 if ((colon = strchr(buf, ':')) == NULL) { 1473 warnx("Malformed entry `%s'. Skipping", buf); 1474 continue; 1475 } 1476 colonc = (size_t)(colon - buf); 1477 if (strncmp(login_name, buf, loginc) == 0 && loginc == colonc) { 1478 if (up != NULL) { 1479 if ((len = snprintf(buf, sizeof(buf), 1480 "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1481 newlogin, 1482 pwp->pw_passwd, 1483 pwp->pw_uid, 1484 pwp->pw_gid, 1485 pwp->pw_class, 1486 (long)pwp->pw_change, 1487 (long)pwp->pw_expire, 1488 pwp->pw_gecos, 1489 pwp->pw_dir, 1490 pwp->pw_shell)) >= sizeof(buf) || len < 0 || 1491 len + expand_len(pwp->pw_gecos, newlogin) 1492 >= 1023) { 1493 (void) close(ptmpfd); 1494 pw_abort(); 1495 errx(EXIT_FAILURE, "can't add `%s', " 1496 "line too long (%zu bytes)", buf, 1497 len + expand_len(pwp->pw_gecos, 1498 newlogin)); 1499 } 1500 if (write(ptmpfd, buf, len) != len) { 1501 (void) close(ptmpfd); 1502 pw_abort(); 1503 err(EXIT_FAILURE, "can't add `%s'", buf); 1504 } 1505 } 1506 } else { 1507 len = strlen(buf); 1508 if ((cc = write(ptmpfd, buf, len)) != len) { 1509 (void) close(masterfd); 1510 (void) close(ptmpfd); 1511 pw_abort(); 1512 err(EXIT_FAILURE, "short write to /etc/ptmp (%lld not %lld chars)", 1513 (long long)cc, (long long)len); 1514 } 1515 } 1516 } 1517 if (up != NULL) { 1518 if ((up->u_flags & F_MKDIR) && 1519 asystem("%s %s %s", MV, homedir, pwp->pw_dir) != 0) { 1520 (void) close(ptmpfd); 1521 pw_abort(); 1522 err(EXIT_FAILURE, "can't move `%s' to `%s'", 1523 homedir, pwp->pw_dir); 1524 } 1525 if (up->u_flags & F_SETSECGROUP) { 1526 for (i = 0 ; i < up->u_groupc ; i++) { 1527 if (getgrnam(up->u_groupv[i]) == NULL) { 1528 (void) close(ptmpfd); 1529 pw_abort(); 1530 errx(EXIT_FAILURE, "aborting, group `%s' does not exist", 1531 up->u_groupv[i]); 1532 } 1533 } 1534 if (!rm_user_from_groups(newlogin)) { 1535 (void) close(ptmpfd); 1536 pw_abort(); 1537 errx(EXIT_FAILURE, "can't reset groups for `%s'", newlogin); 1538 } 1539 } 1540 if (up->u_groupc > 0) { 1541 if (!append_group(newlogin, up->u_groupc, up->u_groupv)) { 1542 (void) close(ptmpfd); 1543 pw_abort(); 1544 errx(EXIT_FAILURE, "can't append `%s' to new groups", 1545 newlogin); 1546 } 1547 } 1548 } 1549 (void) close(ptmpfd); 1550 if (up != NULL && strcmp(login_name, newlogin) == 0) 1551 rval = pw_mkdb(login_name, 0); 1552 else 1553 rval = pw_mkdb(NULL, 0); 1554 if (rval == -1) { 1555 pw_abort(); 1556 err(EXIT_FAILURE, "pw_mkdb failed"); 1557 } 1558 if (up == NULL) { 1559 syslog(LOG_INFO, "user removed: name=%s", login_name); 1560 } else if (strcmp(login_name, newlogin) == 0) { 1561 syslog(LOG_INFO, "user information modified: name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1562 login_name, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, pwp->pw_shell); 1563 } else { 1564 syslog(LOG_INFO, "user information modified: name=%s, new name=%s, uid=%d, gid=%d, home=%s, shell=%s", 1565 login_name, newlogin, pwp->pw_uid, pwp->pw_gid, pwp->pw_dir, pwp->pw_shell); 1566 } 1567 return 1; 1568 } 1569 1570 1571 /* see if we can find out the user struct */ 1572 static struct passwd * 1573 find_user_info(char *name) 1574 { 1575 struct passwd *pwp; 1576 1577 if ((pwp = getpwnam(name)) != NULL) { 1578 return pwp; 1579 } 1580 if (is_number(name) && (pwp = getpwuid((uid_t)atoi(name))) != NULL) { 1581 return pwp; 1582 } 1583 return NULL; 1584 } 1585 1586 /* see if we can find out the group struct */ 1587 static struct group * 1588 find_group_info(char *name) 1589 { 1590 struct group *grp; 1591 1592 if ((grp = getgrnam(name)) != NULL) { 1593 return grp; 1594 } 1595 if (is_number(name) && (grp = getgrgid((gid_t)atoi(name))) != NULL) { 1596 return grp; 1597 } 1598 return NULL; 1599 } 1600 1601 /* print out usage message, and then exit */ 1602 void 1603 usermgmt_usage(const char *prog) 1604 { 1605 if (strcmp(prog, "useradd") == 0) { 1606 (void) fprintf(stderr, "usage: %s -D [-b base-directory] " 1607 "[-e expiry-time] [-f inactive-time]\n" 1608 " [-g gid | name | =uid] [-k skel-directory] " 1609 "[-L login-class]\n" 1610 " [-r low..high] [-s shell]\n", prog); 1611 (void) fprintf(stderr, " %s [-mov] [-b base-directory] " 1612 "[-c comment] [-d home-directory]\n" 1613 " [-e expiry-time] [-f inactive-time]\n" 1614 " [-G secondary-group[,group,...]] " 1615 "[-g gid | name | =uid]\n" 1616 " [-k skel-directory] [-L login-class] " 1617 "[-p password] [-r low..high]\n" 1618 " [-s shell] [-u uid] user\n", prog); 1619 } else if (strcmp(prog, "usermod") == 0) { 1620 (void) fprintf(stderr, "usage: %s [-mov] " 1621 "[-c comment] [-d home-directory] [-e expiry-time]\n" 1622 " [-f inactive-time] " 1623 "[-G secondary-group[,group,...]]\n" 1624 " [-g gid | name | =uid] [-L login-class] " 1625 "[-l new-login]\n" 1626 " [-p password] " 1627 "[-S secondary-group[,group,...]]\n" 1628 " [-s shell] [-u uid] user\n", 1629 prog); 1630 } else if (strcmp(prog, "userdel") == 0) { 1631 (void) fprintf(stderr, "usage: %s -D [-p preserve-value]\n", 1632 prog); 1633 (void) fprintf(stderr, " %s [-rv] [-p preserve-value] " 1634 "user\n", prog); 1635 } else if (strcmp(prog, "userinfo") == 0) { 1636 (void) fprintf(stderr, "usage: %s [-e] user\n", prog); 1637 } else if (strcmp(prog, "groupadd") == 0) { 1638 (void) fprintf(stderr, "usage: %s [-ov] [-g gid] group\n", 1639 prog); 1640 } else if (strcmp(prog, "groupdel") == 0) { 1641 (void) fprintf(stderr, "usage: %s [-v] group\n", prog); 1642 } else if (strcmp(prog, "groupmod") == 0) { 1643 (void) fprintf(stderr, "usage: %s [-ov] [-g gid] [-n newname] " 1644 "group\n", prog); 1645 } else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) { 1646 (void) fprintf(stderr, "usage: %s [add | del | mod" 1647 " | info" 1648 "] ...\n", 1649 prog); 1650 } else if (strcmp(prog, "groupinfo") == 0) { 1651 (void) fprintf(stderr, "usage: %s [-e] group\n", prog); 1652 } else { 1653 (void) fprintf(stderr, "This program must be called as {user,group}{add,del,mod,info},\n%s is not an understood name.\n", prog); 1654 } 1655 exit(EXIT_FAILURE); 1656 /* NOTREACHED */ 1657 } 1658 1659 int 1660 useradd(int argc, char **argv) 1661 { 1662 user_t u; 1663 int defaultfield; 1664 int bigD; 1665 int c; 1666 int i; 1667 1668 (void) memset(&u, 0, sizeof(u)); 1669 read_defaults(&u); 1670 u.u_uid = UID_MAX; 1671 defaultfield = bigD = 0; 1672 while ((c = getopt(argc, argv, "DG:L:b:c:d:e:f:g:k:mop:r:s:u:v")) != -1) { 1673 switch(c) { 1674 case 'D': 1675 bigD = 1; 1676 break; 1677 case 'G': 1678 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1679 u.u_groupc < NGROUPS_MAX - 2) { 1680 if (u.u_groupv[u.u_groupc][0] != 0) { 1681 u.u_groupc++; 1682 } 1683 } 1684 if (optarg != NULL) { 1685 warnx("Truncated list of secondary groups to %d entries", NGROUPS_MAX - 2); 1686 } 1687 break; 1688 case 'b': 1689 defaultfield = 1; 1690 memsave(&u.u_basedir, optarg, strlen(optarg)); 1691 break; 1692 case 'c': 1693 memsave(&u.u_comment, optarg, strlen(optarg)); 1694 break; 1695 case 'd': 1696 memsave(&u.u_home, optarg, strlen(optarg)); 1697 u.u_flags |= F_HOMEDIR; 1698 break; 1699 case 'e': 1700 defaultfield = 1; 1701 memsave(&u.u_expire, optarg, strlen(optarg)); 1702 break; 1703 case 'f': 1704 defaultfield = 1; 1705 memsave(&u.u_inactive, optarg, strlen(optarg)); 1706 break; 1707 case 'g': 1708 defaultfield = 1; 1709 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1710 break; 1711 case 'k': 1712 defaultfield = 1; 1713 memsave(&u.u_skeldir, optarg, strlen(optarg)); 1714 break; 1715 case 'L': 1716 defaultfield = 1; 1717 memsave(&u.u_class, optarg, strlen(optarg)); 1718 break; 1719 case 'm': 1720 u.u_flags |= F_MKDIR; 1721 break; 1722 case 'o': 1723 u.u_flags |= F_DUPUID; 1724 break; 1725 case 'p': 1726 memsave(&u.u_password, optarg, strlen(optarg)); 1727 memset(optarg, 'X', strlen(optarg)); 1728 break; 1729 case 'r': 1730 defaultfield = 1; 1731 (void) save_range(&u, optarg); 1732 break; 1733 case 's': 1734 defaultfield = 1; 1735 memsave(&u.u_shell, optarg, strlen(optarg)); 1736 break; 1737 case 'u': 1738 if (!is_number(optarg)) { 1739 errx(EXIT_FAILURE, "When using [-u uid], the uid must be numeric"); 1740 } 1741 u.u_uid = atoi(optarg); 1742 break; 1743 case 'v': 1744 verbose = 1; 1745 break; 1746 default: 1747 usermgmt_usage("useradd"); 1748 /* NOTREACHED */ 1749 } 1750 } 1751 if (bigD) { 1752 if (defaultfield) { 1753 checkeuid(); 1754 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1755 } 1756 (void) printf("group\t\t%s\n", u.u_primgrp); 1757 (void) printf("base_dir\t%s\n", u.u_basedir); 1758 (void) printf("skel_dir\t%s\n", u.u_skeldir); 1759 (void) printf("shell\t\t%s\n", u.u_shell); 1760 (void) printf("class\t\t%s\n", u.u_class); 1761 (void) printf("inactive\t%s\n", (u.u_inactive == NULL) ? UNSET_INACTIVE : u.u_inactive); 1762 (void) printf("expire\t\t%s\n", (u.u_expire == NULL) ? UNSET_EXPIRY : u.u_expire); 1763 for (i = 0 ; i < u.u_rc ; i++) { 1764 (void) printf("range\t\t%d..%d\n", u.u_rv[i].r_from, u.u_rv[i].r_to); 1765 } 1766 return EXIT_SUCCESS; 1767 } 1768 argc -= optind; 1769 argv += optind; 1770 if (argc != 1) { 1771 usermgmt_usage("useradd"); 1772 } 1773 checkeuid(); 1774 openlog("useradd", LOG_PID, LOG_USER); 1775 return adduser(*argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1776 } 1777 1778 int 1779 usermod(int argc, char **argv) 1780 { 1781 user_t u; 1782 char newuser[MaxUserNameLen + 1]; 1783 int c, have_new_user; 1784 1785 (void) memset(&u, 0, sizeof(u)); 1786 (void) memset(newuser, 0, sizeof(newuser)); 1787 read_defaults(&u); 1788 free(u.u_primgrp); 1789 u.u_primgrp = NULL; 1790 have_new_user = 0; 1791 while ((c = getopt(argc, argv, "G:L:S:c:d:e:f:g:l:mop:s:u:v")) != -1) { 1792 switch(c) { 1793 case 'G': 1794 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1795 u.u_groupc < NGROUPS_MAX - 2) { 1796 if (u.u_groupv[u.u_groupc][0] != 0) { 1797 u.u_groupc++; 1798 } 1799 } 1800 if (optarg != NULL) { 1801 warnx("Truncated list of secondary groups to %d entries", NGROUPS_MAX - 2); 1802 } 1803 u.u_flags |= F_SECGROUP; 1804 break; 1805 case 'S': 1806 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1807 u.u_groupc < NGROUPS_MAX - 2) { 1808 if (u.u_groupv[u.u_groupc][0] != 0) { 1809 u.u_groupc++; 1810 } 1811 } 1812 if (optarg != NULL) { 1813 warnx("Truncated list of secondary groups to %d entries", NGROUPS_MAX - 2); 1814 } 1815 u.u_flags |= F_SETSECGROUP; 1816 break; 1817 case 'c': 1818 memsave(&u.u_comment, optarg, strlen(optarg)); 1819 u.u_flags |= F_COMMENT; 1820 break; 1821 case 'd': 1822 memsave(&u.u_home, optarg, strlen(optarg)); 1823 u.u_flags |= F_HOMEDIR; 1824 break; 1825 case 'e': 1826 memsave(&u.u_expire, optarg, strlen(optarg)); 1827 u.u_flags |= F_EXPIRE; 1828 break; 1829 case 'f': 1830 memsave(&u.u_inactive, optarg, strlen(optarg)); 1831 u.u_flags |= F_INACTIVE; 1832 break; 1833 case 'g': 1834 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1835 u.u_flags |= F_GROUP; 1836 break; 1837 case 'l': 1838 if (strlcpy(newuser, optarg, sizeof(newuser)) >= 1839 sizeof(newuser)) 1840 errx(EXIT_FAILURE, "username `%s' too long", 1841 optarg); 1842 have_new_user = 1; 1843 u.u_flags |= F_USERNAME; 1844 break; 1845 case 'L': 1846 memsave(&u.u_class, optarg, strlen(optarg)); 1847 u.u_flags |= F_CLASS; 1848 break; 1849 case 'm': 1850 u.u_flags |= F_MKDIR; 1851 break; 1852 case 'o': 1853 u.u_flags |= F_DUPUID; 1854 break; 1855 case 'p': 1856 memsave(&u.u_password, optarg, strlen(optarg)); 1857 memset(optarg, 'X', strlen(optarg)); 1858 u.u_flags |= F_PASSWORD; 1859 break; 1860 case 's': 1861 memsave(&u.u_shell, optarg, strlen(optarg)); 1862 u.u_flags |= F_SHELL; 1863 break; 1864 case 'u': 1865 if (!is_number(optarg)) { 1866 errx(EXIT_FAILURE, "When using [-u uid], the uid must be numeric"); 1867 } 1868 u.u_uid = atoi(optarg); 1869 u.u_flags |= F_UID; 1870 break; 1871 case 'v': 1872 verbose = 1; 1873 break; 1874 default: 1875 usermgmt_usage("usermod"); 1876 /* NOTREACHED */ 1877 } 1878 } 1879 if ((u.u_flags & F_MKDIR) && !(u.u_flags & F_HOMEDIR) && 1880 !(u.u_flags & F_USERNAME)) { 1881 warnx("option 'm' useless without 'd' or 'l' -- ignored"); 1882 u.u_flags &= ~F_MKDIR; 1883 } 1884 if ((u.u_flags & F_SECGROUP) && (u.u_flags & F_SETSECGROUP)) 1885 errx(EXIT_FAILURE, "options 'G' and 'S' are mutually exclusive"); 1886 argc -= optind; 1887 argv += optind; 1888 if (argc != 1) { 1889 usermgmt_usage("usermod"); 1890 } 1891 checkeuid(); 1892 openlog("usermod", LOG_PID, LOG_USER); 1893 return moduser(*argv, (have_new_user) ? newuser : *argv, &u) ? 1894 EXIT_SUCCESS : EXIT_FAILURE; 1895 } 1896 1897 int 1898 userdel(int argc, char **argv) 1899 { 1900 struct passwd *pwp; 1901 user_t u; 1902 char password[PasswordLength + 1]; 1903 int defaultfield; 1904 int rmhome; 1905 int bigD; 1906 int c; 1907 1908 (void) memset(&u, 0, sizeof(u)); 1909 read_defaults(&u); 1910 defaultfield = bigD = rmhome = 0; 1911 while ((c = getopt(argc, argv, "Dp:rv")) != -1) { 1912 switch(c) { 1913 case 'D': 1914 bigD = 1; 1915 break; 1916 case 'p': 1917 defaultfield = 1; 1918 u.u_preserve = (strcmp(optarg, "true") == 0) ? 1 : 1919 (strcmp(optarg, "yes") == 0) ? 1 : 1920 atoi(optarg); 1921 break; 1922 case 'r': 1923 rmhome = 1; 1924 break; 1925 case 'v': 1926 verbose = 1; 1927 break; 1928 default: 1929 usermgmt_usage("userdel"); 1930 /* NOTREACHED */ 1931 } 1932 } 1933 if (bigD) { 1934 if (defaultfield) { 1935 checkeuid(); 1936 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1937 } 1938 (void) printf("preserve\t%s\n", (u.u_preserve) ? "true" : "false"); 1939 return EXIT_SUCCESS; 1940 } 1941 argc -= optind; 1942 argv += optind; 1943 if (argc != 1) { 1944 usermgmt_usage("userdel"); 1945 } 1946 checkeuid(); 1947 if ((pwp = getpwnam(*argv)) == NULL) { 1948 warnx("No such user `%s'", *argv); 1949 return EXIT_FAILURE; 1950 } 1951 if (rmhome) 1952 (void)removehomedir(pwp->pw_name, pwp->pw_uid, pwp->pw_dir); 1953 if (u.u_preserve) { 1954 u.u_flags |= F_SHELL; 1955 memsave(&u.u_shell, NOLOGIN, strlen(NOLOGIN)); 1956 (void) memset(password, '*', DES_Len); 1957 password[DES_Len] = 0; 1958 memsave(&u.u_password, password, strlen(password)); 1959 u.u_flags |= F_PASSWORD; 1960 openlog("userdel", LOG_PID, LOG_USER); 1961 return moduser(*argv, *argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1962 } 1963 if (!rm_user_from_groups(*argv)) { 1964 return 0; 1965 } 1966 openlog("userdel", LOG_PID, LOG_USER); 1967 return moduser(*argv, *argv, NULL) ? EXIT_SUCCESS : EXIT_FAILURE; 1968 } 1969 1970 /* add a group */ 1971 int 1972 groupadd(int argc, char **argv) 1973 { 1974 int dupgid; 1975 int gid; 1976 int c; 1977 1978 gid = GID_MAX; 1979 dupgid = 0; 1980 while ((c = getopt(argc, argv, "g:ov")) != -1) { 1981 switch(c) { 1982 case 'g': 1983 if (!is_number(optarg)) { 1984 errx(EXIT_FAILURE, "When using [-g gid], the gid must be numeric"); 1985 } 1986 gid = atoi(optarg); 1987 break; 1988 case 'o': 1989 dupgid = 1; 1990 break; 1991 case 'v': 1992 verbose = 1; 1993 break; 1994 default: 1995 usermgmt_usage("groupadd"); 1996 /* NOTREACHED */ 1997 } 1998 } 1999 argc -= optind; 2000 argv += optind; 2001 if (argc != 1) { 2002 usermgmt_usage("groupadd"); 2003 } 2004 checkeuid(); 2005 if (!valid_group(*argv)) { 2006 errx(EXIT_FAILURE, "invalid group name `%s'", *argv); 2007 } 2008 if (gid < 0 && !getnextgid(&gid, LowGid, HighGid)) { 2009 errx(EXIT_FAILURE, "can't add group: can't get next gid"); 2010 } 2011 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 2012 errx(EXIT_FAILURE, "can't add group: gid %d is a duplicate", gid); 2013 } 2014 openlog("groupadd", LOG_PID, LOG_USER); 2015 if (!creategid(*argv, gid, "")) { 2016 errx(EXIT_FAILURE, "can't add group: problems with %s file", 2017 _PATH_GROUP); 2018 } 2019 return EXIT_SUCCESS; 2020 } 2021 2022 /* remove a group */ 2023 int 2024 groupdel(int argc, char **argv) 2025 { 2026 int c; 2027 2028 while ((c = getopt(argc, argv, "v")) != -1) { 2029 switch(c) { 2030 case 'v': 2031 verbose = 1; 2032 break; 2033 default: 2034 usermgmt_usage("groupdel"); 2035 /* NOTREACHED */ 2036 } 2037 } 2038 argc -= optind; 2039 argv += optind; 2040 if (argc != 1) { 2041 usermgmt_usage("groupdel"); 2042 } 2043 checkeuid(); 2044 openlog("groupdel", LOG_PID, LOG_USER); 2045 if (getgrnam(*argv) == NULL) { 2046 warnx("No such group: `%s'", *argv); 2047 return EXIT_FAILURE; 2048 } 2049 if (!modify_gid(*argv, NULL)) { 2050 err(EXIT_FAILURE, "can't change %s file", _PATH_GROUP); 2051 } 2052 return EXIT_SUCCESS; 2053 } 2054 2055 /* modify a group */ 2056 int 2057 groupmod(int argc, char **argv) 2058 { 2059 struct group *grp; 2060 char buf[LINE_MAX]; 2061 char *newname; 2062 char **cpp; 2063 int dupgid; 2064 int gid; 2065 int cc; 2066 int c; 2067 2068 gid = GID_MAX; 2069 dupgid = 0; 2070 newname = NULL; 2071 while ((c = getopt(argc, argv, "g:n:ov")) != -1) { 2072 switch(c) { 2073 case 'g': 2074 if (!is_number(optarg)) { 2075 errx(EXIT_FAILURE, "When using [-g gid], the gid must be numeric"); 2076 } 2077 gid = atoi(optarg); 2078 break; 2079 case 'o': 2080 dupgid = 1; 2081 break; 2082 case 'n': 2083 memsave(&newname, optarg, strlen(optarg)); 2084 break; 2085 case 'v': 2086 verbose = 1; 2087 break; 2088 default: 2089 usermgmt_usage("groupmod"); 2090 /* NOTREACHED */ 2091 } 2092 } 2093 argc -= optind; 2094 argv += optind; 2095 if (argc != 1) { 2096 usermgmt_usage("groupmod"); 2097 } 2098 checkeuid(); 2099 if (gid < 0 && newname == NULL) { 2100 errx(EXIT_FAILURE, "Nothing to change"); 2101 } 2102 if (dupgid && gid < 0) { 2103 errx(EXIT_FAILURE, "Duplicate which gid?"); 2104 } 2105 if ((grp = getgrnam(*argv)) == NULL) { 2106 errx(EXIT_FAILURE, "can't find group `%s' to modify", *argv); 2107 } 2108 if (!is_local(*argv, _PATH_GROUP)) { 2109 errx(EXIT_FAILURE, "Group `%s' must be a local group", *argv); 2110 } 2111 if (newname != NULL && !valid_group(newname)) { 2112 errx(EXIT_FAILURE, "invalid group name `%s'", newname); 2113 } 2114 if ((cc = snprintf(buf, sizeof(buf), "%s:%s:%u:", 2115 (newname) ? newname : grp->gr_name, grp->gr_passwd, 2116 (gid < 0) ? grp->gr_gid : gid)) >= sizeof(buf) || cc < 0) 2117 errx(EXIT_FAILURE, "group `%s' entry too long", grp->gr_name); 2118 2119 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2120 cc = strlcat(buf, *cpp, sizeof(buf)) + 1; 2121 if (cc >= sizeof(buf)) 2122 errx(EXIT_FAILURE, "group `%s' entry too long", 2123 grp->gr_name); 2124 if (cpp[1] != NULL) { 2125 buf[cc - 1] = ','; 2126 buf[cc] = '\0'; 2127 } 2128 } 2129 cc = strlcat(buf, "\n", sizeof(buf)); 2130 if (cc >= sizeof(buf)) 2131 errx(EXIT_FAILURE, "group `%s' entry too long", grp->gr_name); 2132 2133 openlog("groupmod", LOG_PID, LOG_USER); 2134 if (!modify_gid(*argv, buf)) 2135 err(EXIT_FAILURE, "can't change %s file", _PATH_GROUP); 2136 return EXIT_SUCCESS; 2137 } 2138 2139 /* display user information */ 2140 int 2141 userinfo(int argc, char **argv) 2142 { 2143 struct passwd *pwp; 2144 struct group *grp; 2145 char **cpp; 2146 int exists; 2147 int i; 2148 2149 exists = 0; 2150 while ((i = getopt(argc, argv, "ev")) != -1) { 2151 switch(i) { 2152 case 'e': 2153 exists = 1; 2154 break; 2155 case 'v': 2156 verbose = 1; 2157 break; 2158 default: 2159 usermgmt_usage("userinfo"); 2160 /* NOTREACHED */ 2161 } 2162 } 2163 argc -= optind; 2164 argv += optind; 2165 if (argc != 1) { 2166 usermgmt_usage("userinfo"); 2167 } 2168 pwp = find_user_info(*argv); 2169 if (exists) { 2170 exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE); 2171 } 2172 if (pwp == NULL) { 2173 errx(EXIT_FAILURE, "can't find user `%s'", *argv); 2174 } 2175 (void) printf("login\t%s\n", pwp->pw_name); 2176 (void) printf("passwd\t%s\n", pwp->pw_passwd); 2177 (void) printf("uid\t%u\n", pwp->pw_uid); 2178 if ((grp = getgrgid(pwp->pw_gid)) == NULL) 2179 (void) printf("groups\t%u", pwp->pw_gid); 2180 else 2181 (void) printf("groups\t%s", grp->gr_name); 2182 while ((grp = getgrent()) != NULL) { 2183 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2184 if (strcmp(*cpp, pwp->pw_name) == 0 && 2185 grp->gr_gid != pwp->pw_gid) 2186 (void) printf(" %s", grp->gr_name); 2187 } 2188 } 2189 (void) fputc('\n', stdout); 2190 (void) printf("change\t%s", pwp->pw_change ? ctime(&pwp->pw_change) : "NEVER\n"); 2191 (void) printf("class\t%s\n", pwp->pw_class); 2192 (void) printf("gecos\t%s\n", pwp->pw_gecos); 2193 (void) printf("dir\t%s\n", pwp->pw_dir); 2194 (void) printf("shell\t%s\n", pwp->pw_shell); 2195 (void) printf("expire\t%s", pwp->pw_expire ? ctime(&pwp->pw_expire) : "NEVER\n"); 2196 return EXIT_SUCCESS; 2197 } 2198 2199 /* display user information */ 2200 int 2201 groupinfo(int argc, char **argv) 2202 { 2203 struct group *grp; 2204 char **cpp; 2205 int exists; 2206 int i; 2207 2208 exists = 0; 2209 while ((i = getopt(argc, argv, "ev")) != -1) { 2210 switch(i) { 2211 case 'e': 2212 exists = 1; 2213 break; 2214 case 'v': 2215 verbose = 1; 2216 break; 2217 default: 2218 usermgmt_usage("groupinfo"); 2219 /* NOTREACHED */ 2220 } 2221 } 2222 argc -= optind; 2223 argv += optind; 2224 if (argc != 1) { 2225 usermgmt_usage("groupinfo"); 2226 } 2227 grp = find_group_info(*argv); 2228 if (exists) { 2229 exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE); 2230 } 2231 if (grp == NULL) { 2232 errx(EXIT_FAILURE, "can't find group `%s'", *argv); 2233 } 2234 (void) printf("name\t%s\n", grp->gr_name); 2235 (void) printf("passwd\t%s\n", grp->gr_passwd); 2236 (void) printf("gid\t%u\n", grp->gr_gid); 2237 (void) printf("members\t"); 2238 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 2239 (void) printf("%s ", *cpp); 2240 } 2241 (void) fputc('\n', stdout); 2242 return EXIT_SUCCESS; 2243 } 2244