1 /* $OpenBSD: user.c,v 1.29 2001/12/05 18:23:55 millert Exp $ */ 2 /* $NetBSD: user.c,v 1.45 2001/08/17 08:29:00 joda 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 <paths.h> 44 #include <pwd.h> 45 #include <stdarg.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <time.h> 50 #include <unistd.h> 51 #include <util.h> 52 53 #include "defs.h" 54 #include "usermgmt.h" 55 56 57 /* this struct describes a uid range */ 58 typedef struct range_t { 59 uid_t r_from; /* low uid */ 60 uid_t r_to; /* high uid */ 61 } range_t; 62 63 /* this struct encapsulates the user information */ 64 typedef struct user_t { 65 int u_flags; /* see below */ 66 uid_t u_uid; /* uid of user */ 67 char *u_password; /* encrypted password */ 68 char *u_comment; /* comment field */ 69 char *u_home; /* home directory */ 70 char *u_primgrp; /* primary group */ 71 int u_groupc; /* # of secondary groups */ 72 char *u_groupv[NGROUPS_MAX]; /* secondary groups */ 73 char *u_shell; /* user's shell */ 74 char *u_basedir; /* base directory for home */ 75 char *u_expire; /* when password will expire */ 76 int u_inactive; /* inactive */ 77 char *u_skeldir; /* directory for startup files */ 78 char *u_class; /* login class */ 79 unsigned int u_rsize; /* size of range array */ 80 unsigned int u_rc; /* # of ranges */ 81 range_t *u_rv; /* the ranges */ 82 unsigned int u_defrc; /* # of ranges in defaults */ 83 int u_preserve; /* preserve uids on deletion */ 84 } user_t; 85 86 /* flags for which fields of the user_t replace the passwd entry */ 87 enum { 88 F_COMMENT = 0x0001, 89 F_DUPUID = 0x0002, 90 F_EXPIRE = 0x0004, 91 F_GROUP = 0x0008, 92 F_HOMEDIR = 0x0010, 93 F_MKDIR = 0x0020, 94 F_INACTIVE = 0x0040, 95 F_PASSWORD = 0x0080, 96 F_SECGROUP = 0x0100, 97 F_SHELL = 0x0200, 98 F_UID = 0x0400, 99 F_USERNAME = 0x0800, 100 F_CLASS = 0x1000 101 }; 102 103 #define CONFFILE "/etc/usermgmt.conf" 104 105 #ifndef DEF_GROUP 106 #define DEF_GROUP "users" 107 #endif 108 109 #ifndef DEF_BASEDIR 110 #define DEF_BASEDIR "/home" 111 #endif 112 113 #ifndef DEF_SKELDIR 114 #define DEF_SKELDIR "/etc/skel" 115 #endif 116 117 #ifndef DEF_SHELL 118 #define DEF_SHELL _PATH_CSHELL 119 #endif 120 121 #ifndef DEF_COMMENT 122 #define DEF_COMMENT "" 123 #endif 124 125 #ifndef DEF_LOWUID 126 #define DEF_LOWUID 1000 127 #endif 128 129 #ifndef DEF_HIGHUID 130 #define DEF_HIGHUID 60000 131 #endif 132 133 #ifndef DEF_INACTIVE 134 #define DEF_INACTIVE 0 135 #endif 136 137 #ifndef DEF_EXPIRE 138 #define DEF_EXPIRE NULL 139 #endif 140 141 #ifndef DEF_CLASS 142 #define DEF_CLASS "" 143 #endif 144 145 #ifndef WAITSECS 146 #define WAITSECS 10 147 #endif 148 149 #ifndef NOBODY_UID 150 #define NOBODY_UID 32767 151 #endif 152 153 /* some useful constants */ 154 enum { 155 MaxShellNameLen = 256, 156 MaxFileNameLen = MAXPATHLEN, 157 MaxUserNameLen = MAXLOGNAME, 158 MaxCommandLen = 2048, 159 PasswordLength = _PASSWORD_LEN, 160 161 LowGid = DEF_LOWUID, 162 HighGid = DEF_HIGHUID 163 }; 164 165 /* Full paths of programs used here */ 166 #define CHMOD "/bin/chmod" 167 #define CHOWN "/sbin/chown" 168 #define MKDIR "/bin/mkdir" 169 #define MV "/bin/mv" 170 #define NOLOGIN "/sbin/nologin" 171 #define PAX "/bin/pax" 172 #define RM "/bin/rm" 173 174 #define UNSET_EXPIRY "Null (unset)" 175 176 static int asystem(const char *fmt, ...) 177 __attribute__((__format__(__printf__, 1, 2))); 178 179 static int verbose; 180 181 /* if *cpp is non-null, free it, then assign `n' chars of `s' to it */ 182 static void 183 memsave(char **cpp, char *s, size_t n) 184 { 185 if (*cpp != NULL) { 186 FREE(*cpp); 187 } 188 NEWARRAY(char, *cpp, n + 1, exit(1)); 189 (void) memcpy(*cpp, s, n); 190 (*cpp)[n] = '\0'; 191 } 192 193 /* a replacement for system(3) */ 194 static int 195 asystem(const char *fmt, ...) 196 { 197 va_list vp; 198 char buf[MaxCommandLen]; 199 int ret; 200 201 va_start(vp, fmt); 202 (void) vsnprintf(buf, sizeof(buf), fmt, vp); 203 va_end(vp); 204 if (verbose) { 205 (void) printf("Command: %s\n", buf); 206 } 207 if ((ret = system(buf)) != 0) { 208 warnx("[Warning] can't system `%s'", buf); 209 } 210 return ret; 211 } 212 213 /* remove a users home directory, returning 1 for success (ie, no problems encountered) */ 214 static int 215 removehomedir(const char *user, uid_t uid, const char *dir) 216 { 217 struct stat st; 218 219 /* userid not root? */ 220 if (uid == 0) { 221 warnx("Not deleting home directory `%s'; userid is 0", dir); 222 return 0; 223 } 224 225 /* directory exists (and is a directory!) */ 226 if (stat(dir, &st) < 0) { 227 warnx("Home directory `%s' doesn't exist", dir); 228 return 0; 229 } 230 if (!S_ISDIR(st.st_mode)) { 231 warnx("Home directory `%s' is not a directory", dir); 232 return 0; 233 } 234 235 /* userid matches directory owner? */ 236 if (st.st_uid != uid) { 237 warnx("User `%s' doesn't own directory `%s', not removed\n", 238 user, dir); 239 return 0; 240 } 241 242 (void) seteuid(uid); 243 /* we add the "|| true" to keep asystem() quiet if there is a non-zero exit status. */ 244 (void) asystem("%s -rf %s > /dev/null 2>&1 || true", RM, dir); 245 (void) seteuid(0); 246 if (rmdir(dir) < 0) { 247 warnx("Unable to remove all files in `%s'\n", dir); 248 return 0; 249 } 250 return 1; 251 } 252 253 /* return 1 if all of `s' is numeric */ 254 static int 255 is_number(char *s) 256 { 257 for ( ; *s ; s++) { 258 if (!isdigit(*s)) { 259 return 0; 260 } 261 } 262 return 1; 263 } 264 265 /* 266 * check that the effective uid is 0 - called from funcs which will 267 * modify data and config files. 268 */ 269 static void 270 checkeuid(void) 271 { 272 if (geteuid() != 0) { 273 errx(EXIT_FAILURE, "Program must be run as root"); 274 } 275 } 276 277 /* copy any dot files into the user's home directory */ 278 static int 279 copydotfiles(char *skeldir, uid_t uid, gid_t gid, char *dir) 280 { 281 struct dirent *dp; 282 DIR *dirp; 283 int n; 284 285 if ((dirp = opendir(skeldir)) == NULL) { 286 warn("can't open source . files dir `%s'", skeldir); 287 return 0; 288 } 289 for (n = 0; (dp = readdir(dirp)) != NULL && n == 0 ; ) { 290 if (strcmp(dp->d_name, ".") == 0 || 291 strcmp(dp->d_name, "..") == 0) { 292 continue; 293 } 294 n = 1; 295 } 296 (void) closedir(dirp); 297 if (n == 0) { 298 warnx("No \"dot\" initialisation files found"); 299 } else { 300 (void) asystem("cd %s; %s -rw -pe %s . %s", 301 skeldir, PAX, (verbose) ? "-v" : "", dir); 302 } 303 (void) asystem("%s -R -P %u:%u %s", CHOWN, uid, gid, dir); 304 (void) asystem("%s -R u+w %s", CHMOD, dir); 305 return n; 306 } 307 308 /* create a group entry with gid `gid' */ 309 static int 310 creategid(char *group, gid_t gid, char *name) 311 { 312 struct stat st; 313 FILE *from; 314 FILE *to; 315 char buf[LINE_MAX]; 316 char f[MaxFileNameLen]; 317 int fd; 318 int cc; 319 320 if (getgrnam(group) != NULL) { 321 warnx("group `%s' already exists", group); 322 return 0; 323 } 324 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 325 warn("can't create gid for %s: can't open %s", group, 326 _PATH_GROUP); 327 return 0; 328 } 329 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 330 warn("can't lock `%s'", _PATH_GROUP); 331 } 332 (void) fstat(fileno(from), &st); 333 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 334 if ((fd = mkstemp(f)) < 0) { 335 (void) fclose(from); 336 warn("can't create gid: mkstemp failed"); 337 return 0; 338 } 339 if ((to = fdopen(fd, "w")) == NULL) { 340 (void) fclose(from); 341 (void) close(fd); 342 (void) unlink(f); 343 warn("can't create gid: fdopen `%s' failed", f); 344 return 0; 345 } 346 while ((cc = fread(buf, sizeof(char), sizeof(buf), from)) > 0) { 347 if (fwrite(buf, cc, 1, to) <= 0) { 348 (void) fclose(from); 349 (void) fclose(to); 350 (void) unlink(f); 351 warn("can't create gid: short write to `%s'", f); 352 return 0; 353 } 354 } 355 (void) fprintf(to, "%s:*:%u:%s\n", group, gid, name); 356 (void) fclose(from); 357 (void) fclose(to); 358 if (rename(f, _PATH_GROUP) < 0) { 359 warn("can't create gid: can't rename `%s' to `%s'", f, 360 _PATH_GROUP); 361 return 0; 362 } 363 (void) chmod(_PATH_GROUP, st.st_mode & 07777); 364 return 1; 365 } 366 367 /* modify the group entry with name `group' to be newent */ 368 static int 369 modify_gid(char *group, char *newent) 370 { 371 struct stat st; 372 FILE *from; 373 FILE *to; 374 char buf[LINE_MAX]; 375 char f[MaxFileNameLen]; 376 char *colon; 377 int groupc; 378 int entc; 379 int fd; 380 int cc; 381 382 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 383 warn("can't create gid for %s: can't open %s", group, _PATH_GROUP); 384 return 0; 385 } 386 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 387 warn("can't lock `%s'", _PATH_GROUP); 388 } 389 (void) fstat(fileno(from), &st); 390 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 391 if ((fd = mkstemp(f)) < 0) { 392 (void) fclose(from); 393 warn("can't create gid: mkstemp failed"); 394 return 0; 395 } 396 if ((to = fdopen(fd, "w")) == NULL) { 397 (void) fclose(from); 398 (void) close(fd); 399 (void) unlink(f); 400 warn("can't create gid: fdopen `%s' failed", f); 401 return 0; 402 } 403 groupc = strlen(group); 404 while (fgets(buf, sizeof(buf), from) != NULL) { 405 cc = strlen(buf); 406 if (buf[cc - 1] != '\n') { 407 while (!feof(from) && fgetc(from) != '\n') 408 cc++; 409 warn("line `%s' too long (%d bytes), skipping", buf, 410 cc); 411 continue; 412 } 413 if ((colon = strchr(buf, ':')) == NULL) { 414 warn("badly formed entry `%s'", buf); 415 continue; 416 } 417 entc = (int)(colon - buf); 418 if (entc == groupc && strncmp(group, buf, entc) == 0) { 419 if (newent == NULL) { 420 continue; 421 } else { 422 cc = strlen(newent); 423 (void) strlcpy(buf, newent, sizeof(buf)); 424 } 425 } 426 if (fwrite(buf, cc, 1, to) <= 0) { 427 (void) fclose(from); 428 (void) fclose(to); 429 (void) unlink(f); 430 warn("can't create gid: short write to `%s'", f); 431 return 0; 432 } 433 } 434 (void) fclose(from); 435 (void) fclose(to); 436 if (rename(f, _PATH_GROUP) < 0) { 437 warn("can't create gid: can't rename `%s' to `%s'", f, _PATH_GROUP); 438 return 0; 439 } 440 (void) chmod(_PATH_GROUP, st.st_mode & 07777); 441 return 1; 442 } 443 444 /* modify the group entries for all `groups', by adding `user' */ 445 static int 446 append_group(char *user, int ngroups, char **groups) 447 { 448 struct group *grp; 449 struct stat st; 450 FILE *from; 451 FILE *to; 452 char buf[LINE_MAX]; 453 char f[MaxFileNameLen]; 454 char *colon; 455 int fd; 456 int cc; 457 int i; 458 int j; 459 460 for (i = 0 ; i < ngroups ; i++) { 461 if ((grp = getgrnam(groups[i])) == NULL) { 462 warnx("can't append group `%s' for user `%s'", 463 groups[i], user); 464 } else { 465 for (j = 0 ; grp->gr_mem[j] ; j++) { 466 if (strcmp(user, grp->gr_mem[j]) == 0) { 467 /* already in it */ 468 groups[i] = ""; 469 } 470 } 471 } 472 } 473 if ((from = fopen(_PATH_GROUP, "r")) == NULL) { 474 warn("can't append group for %s: can't open %s", user, 475 _PATH_GROUP); 476 return 0; 477 } 478 if (flock(fileno(from), LOCK_EX | LOCK_NB) < 0) { 479 warn("can't lock `%s'", _PATH_GROUP); 480 } 481 (void) fstat(fileno(from), &st); 482 (void) snprintf(f, sizeof(f), "%s.XXXXXXXX", _PATH_GROUP); 483 if ((fd = mkstemp(f)) < 0) { 484 (void) fclose(from); 485 warn("can't create gid: mkstemp failed"); 486 return 0; 487 } 488 if ((to = fdopen(fd, "w")) == NULL) { 489 (void) fclose(from); 490 (void) close(fd); 491 (void) unlink(f); 492 warn("can't create gid: fdopen `%s' failed", f); 493 return 0; 494 } 495 while (fgets(buf, sizeof(buf), from) != NULL) { 496 cc = strlen(buf); 497 if (buf[cc - 1] != '\n') { 498 while (!feof(from) && fgetc(from) != '\n') 499 cc++; 500 warn("line `%s' too long (%d bytes), skipping", buf, 501 cc); 502 continue; 503 } 504 if ((colon = strchr(buf, ':')) == NULL) { 505 warn("badly formed entry `%s'", buf); 506 continue; 507 } 508 for (i = 0 ; i < ngroups ; i++) { 509 if (strncmp(groups[i], buf, colon - buf) == 0) { 510 while (isspace(buf[cc - 1])) 511 cc--; 512 buf[(j = cc)] = '\0'; 513 if (*(colon + 1) != '\0') 514 strlcat(buf, ",", sizeof(buf)); 515 cc = strlcat(buf, user, sizeof(buf)) + 1; 516 if (cc >= sizeof(buf)) { 517 warnx("Warning: group `%s' would " 518 "become too long, not modifying", 519 groups[i]); 520 cc = j + 1; 521 } 522 buf[cc - 1] = '\n'; 523 buf[cc] = '\0'; 524 } 525 } 526 if (fwrite(buf, cc, 1, to) <= 0) { 527 (void) fclose(from); 528 (void) fclose(to); 529 (void) unlink(f); 530 warn("can't create gid: short write to `%s'", f); 531 return 0; 532 } 533 } 534 (void) fclose(from); 535 (void) fclose(to); 536 if (rename(f, _PATH_GROUP) < 0) { 537 warn("can't create gid: can't rename `%s' to `%s'", f, _PATH_GROUP); 538 return 0; 539 } 540 (void) chmod(_PATH_GROUP, st.st_mode & 07777); 541 return 1; 542 } 543 544 /* return 1 if `login' is a valid login name */ 545 static int 546 valid_login(char *login) 547 { 548 char *cp; 549 550 for (cp = login ; *cp ; cp++) { 551 if (!isalnum(*cp) && *cp != '.' && *cp != '_' && *cp != '-') { 552 return 0; 553 } 554 } 555 return 1; 556 } 557 558 /* return 1 if `group' is a valid group name */ 559 static int 560 valid_group(char *group) 561 { 562 char *cp; 563 564 for (cp = group ; *cp ; cp++) { 565 if (!isalnum(*cp)) { 566 return 0; 567 } 568 } 569 return 1; 570 } 571 572 /* find the next gid in the range lo .. hi */ 573 static int 574 getnextgid(uid_t *gidp, uid_t lo, uid_t hi) 575 { 576 for (*gidp = lo ; *gidp < hi ; *gidp += 1) { 577 if (getgrgid((gid_t)*gidp) == NULL) { 578 return 1; 579 } 580 } 581 return 0; 582 } 583 584 #ifdef EXTENSIONS 585 /* save a range of uids */ 586 static int 587 save_range(user_t *up, char *cp) 588 { 589 int from; 590 int to; 591 int i; 592 593 if (up->u_rsize == 0) { 594 up->u_rsize = 32; 595 NEWARRAY(range_t, up->u_rv, up->u_rsize, return(0)); 596 } else if (up->u_rc == up->u_rsize) { 597 up->u_rsize *= 2; 598 RENEW(range_t, up->u_rv, up->u_rsize, return(0)); 599 } 600 if (up->u_rv && sscanf(cp, "%d..%d", &from, &to) == 2) { 601 for (i = up->u_defrc ; i < up->u_rc ; i++) { 602 if (up->u_rv[i].r_from == from && up->u_rv[i].r_to == to) { 603 break; 604 } 605 } 606 if (i == up->u_rc) { 607 up->u_rv[up->u_rc].r_from = from; 608 up->u_rv[up->u_rc].r_to = to; 609 up->u_rc += 1; 610 } 611 } else { 612 warnx("Bad range `%s'", cp); 613 return 0; 614 } 615 return 1; 616 } 617 #endif 618 619 /* set the defaults in the defaults file */ 620 static int 621 setdefaults(user_t *up) 622 { 623 char template[MaxFileNameLen]; 624 FILE *fp; 625 int ret; 626 int fd; 627 #ifdef EXTENSIONS 628 int i; 629 #endif 630 631 (void) snprintf(template, sizeof(template), "%s.XXXXXXXX", CONFFILE); 632 if ((fd = mkstemp(template)) < 0) { 633 warnx("can't mkstemp `%s' for writing", CONFFILE); 634 return 0; 635 } 636 if ((fp = fdopen(fd, "w")) == NULL) { 637 warn("can't fdopen `%s' for writing", CONFFILE); 638 return 0; 639 } 640 ret = 1; 641 if (fprintf(fp, "group\t\t%s\n", up->u_primgrp) <= 0 || 642 fprintf(fp, "base_dir\t%s\n", up->u_basedir) <= 0 || 643 fprintf(fp, "skel_dir\t%s\n", up->u_skeldir) <= 0 || 644 fprintf(fp, "shell\t\t%s\n", up->u_shell) <= 0 || 645 #ifdef EXTENSIONS 646 fprintf(fp, "class\t\t%s\n", up->u_class) <= 0 || 647 #endif 648 fprintf(fp, "inactive\t%d\n", up->u_inactive) <= 0 || 649 fprintf(fp, "expire\t\t%s\n", (up->u_expire == NULL) ? UNSET_EXPIRY : up->u_expire) <= 0 || 650 fprintf(fp, "preserve\t%s\n", (up->u_preserve == 0) ? "false" : "true") <= 0) { 651 warn("can't write to `%s'", CONFFILE); 652 ret = 0; 653 } 654 #ifdef EXTENSIONS 655 for (i = (up->u_defrc != up->u_rc) ? up->u_defrc : 0 ; i < up->u_rc ; i++) { 656 if (fprintf(fp, "range\t\t%d..%d\n", up->u_rv[i].r_from, up->u_rv[i].r_to) <= 0) { 657 warn("can't write to `%s'", CONFFILE); 658 ret = 0; 659 } 660 } 661 #endif 662 (void) fclose(fp); 663 if (ret) { 664 ret = ((rename(template, CONFFILE) == 0) && (chmod(CONFFILE, 0644) == 0)); 665 } 666 return ret; 667 } 668 669 /* read the defaults file */ 670 static void 671 read_defaults(user_t *up) 672 { 673 struct stat st; 674 size_t lineno; 675 size_t len; 676 FILE *fp; 677 char *cp; 678 char *s; 679 680 memsave(&up->u_primgrp, DEF_GROUP, strlen(DEF_GROUP)); 681 memsave(&up->u_basedir, DEF_BASEDIR, strlen(DEF_BASEDIR)); 682 memsave(&up->u_skeldir, DEF_SKELDIR, strlen(DEF_SKELDIR)); 683 memsave(&up->u_shell, DEF_SHELL, strlen(DEF_SHELL)); 684 memsave(&up->u_comment, DEF_COMMENT, strlen(DEF_COMMENT)); 685 #ifdef EXTENSIONS 686 memsave(&up->u_class, DEF_CLASS, strlen(DEF_CLASS)); 687 #endif 688 up->u_rsize = 16; 689 up->u_defrc = 0; 690 NEWARRAY(range_t, up->u_rv, up->u_rsize, exit(1)); 691 up->u_inactive = DEF_INACTIVE; 692 up->u_expire = DEF_EXPIRE; 693 if ((fp = fopen(CONFFILE, "r")) == NULL) { 694 if (stat(CONFFILE, &st) < 0 && !setdefaults(up)) { 695 warn("can't create `%s' defaults file", CONFFILE); 696 } 697 fp = fopen(CONFFILE, "r"); 698 } 699 if (fp != NULL) { 700 while ((s = fparseln(fp, &len, &lineno, NULL, 0)) != NULL) { 701 if (strncmp(s, "group", 5) == 0) { 702 for (cp = s + 5 ; *cp && isspace(*cp) ; cp++) { 703 } 704 memsave(&up->u_primgrp, cp, strlen(cp)); 705 } else if (strncmp(s, "base_dir", 8) == 0) { 706 for (cp = s + 8 ; *cp && isspace(*cp) ; cp++) { 707 } 708 memsave(&up->u_basedir, cp, strlen(cp)); 709 } else if (strncmp(s, "skel_dir", 8) == 0) { 710 for (cp = s + 8 ; *cp && isspace(*cp) ; cp++) { 711 } 712 memsave(&up->u_skeldir, cp, strlen(cp)); 713 } else if (strncmp(s, "shell", 5) == 0) { 714 for (cp = s + 5 ; *cp && isspace(*cp) ; cp++) { 715 } 716 memsave(&up->u_shell, cp, strlen(cp)); 717 } else if (strncmp(s, "password", 8) == 0) { 718 for (cp = s + 8 ; *cp && isspace(*cp) ; cp++) { 719 } 720 memsave(&up->u_password, cp, strlen(cp)); 721 #ifdef EXTENSIONS 722 } else if (strncmp(s, "class", 5) == 0) { 723 for (cp = s + 5 ; *cp && isspace(*cp) ; cp++) { 724 } 725 memsave(&up->u_class, cp, strlen(cp)); 726 #endif 727 } else if (strncmp(s, "inactive", 8) == 0) { 728 for (cp = s + 8 ; *cp && isspace(*cp) ; cp++) { 729 } 730 up->u_inactive = atoi(cp); 731 #ifdef EXTENSIONS 732 } else if (strncmp(s, "range", 5) == 0) { 733 for (cp = s + 5 ; *cp && isspace(*cp) ; cp++) { 734 } 735 (void) save_range(up, cp); 736 #endif 737 #ifdef EXTENSIONS 738 } else if (strncmp(s, "preserve", 8) == 0) { 739 for (cp = s + 8 ; *cp && isspace(*cp) ; cp++) { 740 } 741 up->u_preserve = (strncmp(cp, "true", 4) == 0) ? 1 : 742 (strncmp(cp, "yes", 3) == 0) ? 1 : 743 atoi(cp); 744 #endif 745 } else if (strncmp(s, "expire", 6) == 0) { 746 for (cp = s + 6 ; *cp && isspace(*cp) ; cp++) { 747 } 748 if (strcmp(cp, UNSET_EXPIRY) == 0) { 749 if (up->u_expire) { 750 FREE(up->u_expire); 751 } 752 up->u_expire = NULL; 753 } else { 754 memsave(&up->u_expire, cp, strlen(cp)); 755 } 756 } 757 (void) free(s); 758 } 759 (void) fclose(fp); 760 } 761 if (up->u_rc == 0) { 762 up->u_rv[up->u_rc].r_from = DEF_LOWUID; 763 up->u_rv[up->u_rc].r_to = DEF_HIGHUID; 764 up->u_rc += 1; 765 } 766 up->u_defrc = up->u_rc; 767 } 768 769 /* return the next valid unused uid */ 770 static int 771 getnextuid(int sync_uid_gid, uid_t *uid, uid_t low_uid, uid_t high_uid) 772 { 773 for (*uid = low_uid ; *uid <= high_uid ; (*uid)++) { 774 if (getpwuid((uid_t)(*uid)) == NULL && *uid != NOBODY_UID) { 775 if (sync_uid_gid) { 776 if (getgrgid((gid_t)(*uid)) == NULL) { 777 return 1; 778 } 779 } else { 780 return 1; 781 } 782 } 783 } 784 return 0; 785 } 786 787 /* add a user */ 788 static int 789 adduser(char *login, user_t *up) 790 { 791 struct group *grp; 792 struct stat st; 793 struct tm tm; 794 time_t expire; 795 char password[PasswordLength + 1]; 796 char home[MaxFileNameLen]; 797 char buf[LINE_MAX]; 798 int sync_uid_gid; 799 int masterfd; 800 int ptmpfd; 801 gid_t gid; 802 int cc; 803 int i; 804 805 if (!valid_login(login)) { 806 errx(EXIT_FAILURE, "`%s' is not a valid login name", login); 807 } 808 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 809 err(EXIT_FAILURE, "can't open `%s'", _PATH_MASTERPASSWD); 810 } 811 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 812 err(EXIT_FAILURE, "can't lock `%s'", _PATH_MASTERPASSWD); 813 } 814 pw_init(); 815 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 816 (void) close(masterfd); 817 err(EXIT_FAILURE, "can't obtain pw_lock"); 818 } 819 while ((cc = read(masterfd, buf, sizeof(buf))) > 0) { 820 if (write(ptmpfd, buf, (size_t)(cc)) != cc) { 821 (void) close(masterfd); 822 (void) close(ptmpfd); 823 (void) pw_abort(); 824 err(EXIT_FAILURE, "short write to /etc/ptmp (not %d chars)", cc); 825 } 826 } 827 /* if no uid was specified, get next one in [low_uid..high_uid] range */ 828 sync_uid_gid = (strcmp(up->u_primgrp, "=uid") == 0); 829 if (up->u_uid == UID_MAX) { 830 for (i = 0 ; i < up->u_rc ; i++) { 831 if (getnextuid(sync_uid_gid, &up->u_uid, up->u_rv[i].r_from, up->u_rv[i].r_to)) { 832 break; 833 } 834 } 835 if (i == up->u_rc) { 836 (void) close(ptmpfd); 837 (void) pw_abort(); 838 errx(EXIT_FAILURE, "can't get next uid for %u", up->u_uid); 839 } 840 } 841 /* check uid isn't already allocated */ 842 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 843 (void) close(ptmpfd); 844 (void) pw_abort(); 845 errx(EXIT_FAILURE, "uid %u is already in use", up->u_uid); 846 } 847 /* if -g=uid was specified, check gid is unused */ 848 if (sync_uid_gid) { 849 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 850 (void) close(ptmpfd); 851 (void) pw_abort(); 852 errx(EXIT_FAILURE, "gid %u is already in use", up->u_uid); 853 } 854 gid = up->u_uid; 855 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 856 gid = grp->gr_gid; 857 } else if (is_number(up->u_primgrp) && 858 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 859 gid = grp->gr_gid; 860 } else { 861 (void) close(ptmpfd); 862 (void) pw_abort(); 863 errx(EXIT_FAILURE, "group %s not found", up->u_primgrp); 864 } 865 /* check name isn't already in use */ 866 if (!(up->u_flags & F_DUPUID) && getpwnam(login) != NULL) { 867 (void) close(ptmpfd); 868 (void) pw_abort(); 869 errx(EXIT_FAILURE, "already a `%s' user", login); 870 } 871 if (up->u_flags & F_HOMEDIR) { 872 (void) strlcpy(home, up->u_home, sizeof(home)); 873 } else { 874 /* if home directory hasn't been given, make it up */ 875 (void) snprintf(home, sizeof(home), "%s/%s", up->u_basedir, login); 876 } 877 expire = 0; 878 if (up->u_expire != NULL) { 879 (void) memset(&tm, 0, sizeof(tm)); 880 if (strptime(up->u_expire, "%c", &tm) == NULL) { 881 warnx("invalid time format `%s'", optarg); 882 } else { 883 expire = mktime(&tm); 884 } 885 } 886 if (lstat(home, &st) < 0 && !(up->u_flags & F_MKDIR)) { 887 warnx("Warning: home directory `%s' doesn't exist, and -m was" 888 " not specified", home); 889 } 890 if (up->u_password != NULL && 891 strlen(up->u_password) <= PasswordLength) { 892 (void) strlcpy(password, up->u_password, sizeof(password)); 893 } else { 894 (void) strlcpy(password, "*", sizeof(password)); 895 if (up->u_password != NULL) { 896 warnx("Password `%s' is invalid: setting it to `%s'", 897 up->u_password, password); 898 } 899 } 900 901 cc = snprintf(buf, sizeof(buf), "%s:%s:%u:%u:%s:%d:%ld:%s:%s:%s\n", 902 login, 903 password, 904 up->u_uid, 905 gid, 906 #ifdef EXTENSIONS 907 up->u_class, 908 #else 909 "", 910 #endif 911 up->u_inactive, 912 (long) expire, 913 up->u_comment, 914 home, 915 up->u_shell); 916 if (cc >= sizeof(buf) || cc == -1 || 917 (strchr(up->u_comment, '&') != NULL && 918 cc + strlen(login) >= sizeof(buf))) { 919 (void) close(ptmpfd); 920 (void) pw_abort(); 921 errx(EXIT_FAILURE, "can't add `%s', line too long", buf); 922 } 923 if (write(ptmpfd, buf, (size_t) cc) != cc) { 924 (void) close(ptmpfd); 925 (void) pw_abort(); 926 err(EXIT_FAILURE, "can't add `%s'", buf); 927 } 928 if (up->u_flags & F_MKDIR) { 929 if (lstat(home, &st) == 0) { 930 (void) close(ptmpfd); 931 (void) pw_abort(); 932 errx(EXIT_FAILURE, "home directory `%s' already exists", 933 home); 934 } else { 935 if (asystem("%s -p %s", MKDIR, home) != 0) { 936 (void) close(ptmpfd); 937 (void) pw_abort(); 938 err(EXIT_FAILURE, "can't mkdir `%s'", home); 939 } 940 (void) copydotfiles(up->u_skeldir, up->u_uid, gid, home); 941 } 942 } 943 if (strcmp(up->u_primgrp, "=uid") == 0 && getgrnam(login) == NULL && 944 !creategid(login, gid, login)) { 945 (void) close(ptmpfd); 946 (void) pw_abort(); 947 errx(EXIT_FAILURE, "can't create gid %d for login name %s", 948 gid, login); 949 } 950 if (up->u_groupc > 0 && !append_group(login, up->u_groupc, up->u_groupv)) { 951 (void) close(ptmpfd); 952 (void) pw_abort(); 953 errx(EXIT_FAILURE, "can't append `%s' to new groups", login); 954 } 955 (void) close(ptmpfd); 956 if (pw_mkdb(login, 0) < 0) { 957 err(EXIT_FAILURE, "pw_mkdb failed"); 958 } 959 return 1; 960 } 961 962 /* modify a user */ 963 static int 964 moduser(char *login, char *newlogin, user_t *up) 965 { 966 struct passwd *pwp; 967 struct group *grp; 968 struct tm tm; 969 const char *homedir; 970 char buf[LINE_MAX]; 971 size_t colonc, len, loginc; 972 size_t cc; 973 FILE *master; 974 char newdir[MaxFileNameLen]; 975 char *colon, *line; 976 int masterfd; 977 int ptmpfd; 978 int rval; 979 980 if (!valid_login(newlogin)) { 981 errx(EXIT_FAILURE, "`%s' is not a valid login name", login); 982 } 983 if ((pwp = getpwnam(login)) == NULL) { 984 errx(EXIT_FAILURE, "No such user `%s'", login); 985 } 986 /* keep dir name in case we need it for '-m' */ 987 homedir = pwp->pw_dir; 988 989 if ((masterfd = open(_PATH_MASTERPASSWD, O_RDONLY)) < 0) { 990 err(EXIT_FAILURE, "can't open `%s'", _PATH_MASTERPASSWD); 991 } 992 if (flock(masterfd, LOCK_EX | LOCK_NB) < 0) { 993 err(EXIT_FAILURE, "can't lock `%s'", _PATH_MASTERPASSWD); 994 } 995 pw_init(); 996 if ((ptmpfd = pw_lock(WAITSECS)) < 0) { 997 (void) close(masterfd); 998 err(EXIT_FAILURE, "can't obtain pw_lock"); 999 } 1000 if ((master = fdopen(masterfd, "r")) == NULL) { 1001 (void) close(masterfd); 1002 (void) close(ptmpfd); 1003 (void) pw_abort(); 1004 err(EXIT_FAILURE, "can't fdopen fd for %s", _PATH_MASTERPASSWD); 1005 } 1006 if (up != NULL) { 1007 if (up->u_flags & F_USERNAME) { 1008 /* if changing name, check new name isn't already in use */ 1009 if (strcmp(login, newlogin) != 0 && getpwnam(newlogin) != NULL) { 1010 (void) close(ptmpfd); 1011 (void) pw_abort(); 1012 errx(EXIT_FAILURE, "already a `%s' user", newlogin); 1013 } 1014 pwp->pw_name = newlogin; 1015 1016 /* 1017 * Provide a new directory name in case the 1018 * home directory is to be moved. 1019 */ 1020 if (up->u_flags & F_MKDIR) { 1021 (void) snprintf(newdir, sizeof(newdir), 1022 "%s/%s", up->u_basedir, newlogin); 1023 pwp->pw_dir = newdir; 1024 } 1025 } 1026 if (up->u_flags & F_PASSWORD) { 1027 if (up->u_password != NULL && strlen(up->u_password) <= PasswordLength) 1028 pwp->pw_passwd = up->u_password; 1029 } 1030 if (up->u_flags & F_UID) { 1031 /* check uid isn't already allocated */ 1032 if (!(up->u_flags & F_DUPUID) && getpwuid((uid_t)(up->u_uid)) != NULL) { 1033 (void) close(ptmpfd); 1034 (void) pw_abort(); 1035 errx(EXIT_FAILURE, "uid %u is already in use", up->u_uid); 1036 } 1037 pwp->pw_uid = up->u_uid; 1038 } 1039 if (up->u_flags & F_GROUP) { 1040 /* if -g=uid was specified, check gid is unused */ 1041 if (strcmp(up->u_primgrp, "=uid") == 0) { 1042 if (getgrgid((gid_t)(up->u_uid)) != NULL) { 1043 (void) close(ptmpfd); 1044 (void) pw_abort(); 1045 errx(EXIT_FAILURE, "gid %u is already in use", up->u_uid); 1046 } 1047 pwp->pw_gid = up->u_uid; 1048 } else if ((grp = getgrnam(up->u_primgrp)) != NULL) { 1049 pwp->pw_gid = grp->gr_gid; 1050 } else if (is_number(up->u_primgrp) && 1051 (grp = getgrgid((gid_t)atoi(up->u_primgrp))) != NULL) { 1052 pwp->pw_gid = grp->gr_gid; 1053 } else { 1054 (void) close(ptmpfd); 1055 (void) pw_abort(); 1056 errx(EXIT_FAILURE, "group %s not found", up->u_primgrp); 1057 } 1058 } 1059 if (up->u_flags |= F_INACTIVE) 1060 pwp->pw_change = up->u_inactive; 1061 if (up->u_flags & F_EXPIRE) { 1062 (void) memset(&tm, 0, sizeof(tm)); 1063 if (strptime(up->u_expire, "%c", &tm) == NULL) 1064 warnx("invalid time format `%s'", optarg); 1065 else 1066 pwp->pw_expire = mktime(&tm); 1067 } 1068 if (up->u_flags & F_COMMENT) 1069 pwp->pw_gecos = up->u_comment; 1070 if (up->u_flags & F_HOMEDIR) 1071 pwp->pw_dir = up->u_home; 1072 if (up->u_flags & F_SHELL) 1073 pwp->pw_shell = up->u_shell; 1074 #ifdef EXTENSIONS 1075 if (up->u_flags & F_CLASS) 1076 pwp->pw_class = up->u_class; 1077 #endif 1078 } 1079 loginc = strlen(login); 1080 while ((line = fgetln(master, &len)) != NULL) { 1081 if ((colon = strchr(line, ':')) == NULL) { 1082 warnx("Malformed entry `%s'. Skipping", line); 1083 continue; 1084 } 1085 colonc = (size_t)(colon - line); 1086 if (strncmp(login, line, loginc) == 0 && loginc == colonc) { 1087 if (up != NULL) { 1088 len = snprintf(buf, sizeof(buf), 1089 "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", 1090 newlogin, 1091 pwp->pw_passwd, 1092 pwp->pw_uid, 1093 pwp->pw_gid, 1094 #ifdef EXTENSIONS 1095 pwp->pw_class, 1096 #else 1097 "", 1098 #endif 1099 (long)pwp->pw_change, 1100 (long)pwp->pw_expire, 1101 pwp->pw_gecos, 1102 pwp->pw_dir, 1103 pwp->pw_shell); 1104 if (len >= sizeof(buf) || 1105 (strchr(up->u_comment, '&') != NULL && 1106 len + strlen(newlogin) >= sizeof(buf))) { 1107 (void) close(ptmpfd); 1108 (void) pw_abort(); 1109 errx(EXIT_FAILURE, "can't add `%s', line too long (%d bytes)", buf, len + strlen(newlogin)); 1110 } 1111 if (write(ptmpfd, buf, len) != len) { 1112 (void) close(ptmpfd); 1113 (void) pw_abort(); 1114 err(EXIT_FAILURE, "can't add `%s'", buf); 1115 } 1116 } 1117 } else if ((cc = write(ptmpfd, line, len)) != len) { 1118 (void) close(masterfd); 1119 (void) close(ptmpfd); 1120 (void) pw_abort(); 1121 err(EXIT_FAILURE, "short write to /etc/ptmp (%lld not %lld chars)", 1122 (long long)cc, (long long)len); 1123 } 1124 } 1125 if (up != NULL) { 1126 if ((up->u_flags & F_MKDIR) && 1127 asystem("%s %s %s", MV, homedir, pwp->pw_dir) != 0) { 1128 (void) close(ptmpfd); 1129 (void) pw_abort(); 1130 err(EXIT_FAILURE, "can't move `%s' to `%s'", 1131 homedir, pwp->pw_dir); 1132 } 1133 if (up->u_groupc > 0 && 1134 !append_group(newlogin, up->u_groupc, up->u_groupv)) { 1135 (void) close(ptmpfd); 1136 (void) pw_abort(); 1137 errx(EXIT_FAILURE, "can't append `%s' to new groups", 1138 newlogin); 1139 } 1140 } 1141 (void) close(ptmpfd); 1142 if (up != NULL && strcmp(login, newlogin) == 0) 1143 rval = pw_mkdb(login, 0); 1144 else 1145 rval = pw_mkdb(NULL, 0); 1146 if (rval == -1) 1147 err(EXIT_FAILURE, "pw_mkdb failed"); 1148 1149 return 1; 1150 } 1151 1152 1153 #ifdef EXTENSIONS 1154 /* see if we can find out the user struct */ 1155 static struct passwd * 1156 find_user_info(char *name) 1157 { 1158 struct passwd *pwp; 1159 1160 if ((pwp = getpwnam(name)) != NULL) { 1161 return pwp; 1162 } 1163 if (is_number(name) && (pwp = getpwuid((uid_t)atoi(name))) != NULL) { 1164 return pwp; 1165 } 1166 return NULL; 1167 } 1168 #endif 1169 1170 #ifdef EXTENSIONS 1171 /* see if we can find out the group struct */ 1172 static struct group * 1173 find_group_info(char *name) 1174 { 1175 struct group *grp; 1176 1177 if ((grp = getgrnam(name)) != NULL) { 1178 return grp; 1179 } 1180 if (is_number(name) && (grp = getgrgid((gid_t)atoi(name))) != NULL) { 1181 return grp; 1182 } 1183 return NULL; 1184 } 1185 #endif 1186 1187 /* print out usage message, and then exit */ 1188 void 1189 usermgmt_usage(const char *prog) 1190 { 1191 if (strcmp(prog, "useradd") == 0) { 1192 (void) fprintf(stderr, "usage: %s -D [-b basedir] [-e expiry] " 1193 "[-f changetime] [-g group]\n\t\t[-k skeletondir] " 1194 "[-r low..high] [-s shell] [-L class]\n", prog); 1195 (void) fprintf(stderr, "usage: %s [-mov] [-G group[,group,...]]" 1196 " [-b basedir] [-c comment]\n\t\t" 1197 "[-d homedir] [-e expiry] [-f changetime] [-g group]\n\t\t" 1198 "[-k skeletondir] [-p password] " 1199 "[-r lowuid..highuid]\n\t\t[-s shell] [-u uid] [-L class] " 1200 "user\n", prog); 1201 } else if (strcmp(prog, "usermod") == 0) { 1202 (void) fprintf(stderr, "usage: %s [-mov] [-G group[,group,...]]" 1203 " [-c comment] [-d homedir]\n\t\t" 1204 "[-e expire] [-f changetime] [-g group] [-l newname]\n\t\t" 1205 "[-p password] [-s shell] [-u uid] [-L class] user\n", 1206 prog); 1207 } else if (strcmp(prog, "userdel") == 0) { 1208 (void) fprintf(stderr, "usage: %s -D [-p preserve]\n", prog); 1209 (void) fprintf(stderr, "usage: %s [-prv] user\n", prog); 1210 #ifdef EXTENSIONS 1211 } else if (strcmp(prog, "userinfo") == 0) { 1212 (void) fprintf(stderr, "usage: %s [-ev] user\n", prog); 1213 #endif 1214 } else if (strcmp(prog, "groupadd") == 0) { 1215 (void) fprintf(stderr, "usage: %s [-ov] [-g gid] group\n", 1216 prog); 1217 } else if (strcmp(prog, "groupdel") == 0) { 1218 (void) fprintf(stderr, "usage: %s [-v] group\n", prog); 1219 } else if (strcmp(prog, "groupmod") == 0) { 1220 (void) fprintf(stderr, "usage: %s [-ov] [-g gid] [-n newname] " 1221 "group\n", prog); 1222 } else if (strcmp(prog, "user") == 0 || strcmp(prog, "group") == 0) { 1223 (void) fprintf(stderr, "usage: %s [ add | del | mod " 1224 #ifdef EXTENSIONS 1225 "| info " 1226 #endif 1227 "] ...\n", 1228 prog); 1229 #ifdef EXTENSIONS 1230 } else if (strcmp(prog, "groupinfo") == 0) { 1231 (void) fprintf(stderr, "usage: %s [-ev] group\n", prog); 1232 #endif 1233 } else { 1234 (void) fprintf(stderr, "This program must be called as {user,group}{add,del,mod,info},\n%s is not an understood name.\n", prog); 1235 } 1236 exit(EXIT_FAILURE); 1237 /* NOTREACHED */ 1238 } 1239 1240 #ifdef EXTENSIONS 1241 #define ADD_OPT_EXTENSIONS "p:r:vL:" 1242 #else 1243 #define ADD_OPT_EXTENSIONS 1244 #endif 1245 1246 int 1247 useradd(int argc, char **argv) 1248 { 1249 user_t u; 1250 int defaultfield; 1251 int bigD; 1252 int c; 1253 #ifdef EXTENSIONS 1254 int i; 1255 #endif 1256 1257 (void) memset(&u, 0, sizeof(u)); 1258 read_defaults(&u); 1259 u.u_uid = UID_MAX; 1260 defaultfield = bigD = 0; 1261 while ((c = getopt(argc, argv, "DG:b:c:d:e:f:g:k:mou:s:" ADD_OPT_EXTENSIONS)) != -1) { 1262 switch(c) { 1263 case 'D': 1264 bigD = 1; 1265 break; 1266 case 'G': 1267 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1268 u.u_groupc < NGROUPS_MAX - 2) { 1269 if (u.u_groupv[u.u_groupc][0] != 0) { 1270 u.u_groupc++; 1271 } 1272 } 1273 if (optarg != NULL) { 1274 warnx("Truncated list of secondary groups to %d entries", NGROUPS_MAX - 2); 1275 } 1276 break; 1277 case 'b': 1278 defaultfield = 1; 1279 memsave(&u.u_basedir, optarg, strlen(optarg)); 1280 break; 1281 case 'c': 1282 memsave(&u.u_comment, optarg, strlen(optarg)); 1283 break; 1284 case 'd': 1285 memsave(&u.u_home, optarg, strlen(optarg)); 1286 u.u_flags |= F_HOMEDIR; 1287 break; 1288 case 'e': 1289 defaultfield = 1; 1290 memsave(&u.u_expire, optarg, strlen(optarg)); 1291 break; 1292 case 'f': 1293 defaultfield = 1; 1294 u.u_inactive = atoi(optarg); 1295 break; 1296 case 'g': 1297 defaultfield = 1; 1298 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1299 break; 1300 case 'k': 1301 memsave(&u.u_skeldir, optarg, strlen(optarg)); 1302 break; 1303 #ifdef EXTENSIONS 1304 case 'L': 1305 defaultfield = 1; 1306 memsave(&u.u_class, optarg, strlen(optarg)); 1307 break; 1308 #endif 1309 case 'm': 1310 u.u_flags |= F_MKDIR; 1311 break; 1312 case 'o': 1313 u.u_flags |= F_DUPUID; 1314 break; 1315 #ifdef EXTENSIONS 1316 case 'p': 1317 memsave(&u.u_password, optarg, strlen(optarg)); 1318 break; 1319 #endif 1320 #ifdef EXTENSIONS 1321 case 'r': 1322 defaultfield = 1; 1323 (void) save_range(&u, optarg); 1324 break; 1325 #endif 1326 case 's': 1327 defaultfield = 1; 1328 memsave(&u.u_shell, optarg, strlen(optarg)); 1329 break; 1330 case 'u': 1331 if (!is_number(optarg)) { 1332 errx(EXIT_FAILURE, "When using [-u uid], the uid must be numeric"); 1333 } 1334 u.u_uid = atoi(optarg); 1335 break; 1336 #ifdef EXTENSIONS 1337 case 'v': 1338 verbose = 1; 1339 break; 1340 #endif 1341 } 1342 } 1343 if (bigD) { 1344 if (defaultfield) { 1345 checkeuid(); 1346 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1347 } 1348 (void) printf("group\t\t%s\n", u.u_primgrp); 1349 (void) printf("base_dir\t%s\n", u.u_basedir); 1350 (void) printf("skel_dir\t%s\n", u.u_skeldir); 1351 (void) printf("shell\t\t%s\n", u.u_shell); 1352 #ifdef EXTENSIONS 1353 (void) printf("class\t\t%s\n", u.u_class); 1354 #endif 1355 (void) printf("inactive\t%d\n", u.u_inactive); 1356 (void) printf("expire\t\t%s\n", (u.u_expire == NULL) ? UNSET_EXPIRY : u.u_expire); 1357 #ifdef EXTENSIONS 1358 for (i = 0 ; i < u.u_rc ; i++) { 1359 (void) printf("range\t\t%d..%d\n", u.u_rv[i].r_from, u.u_rv[i].r_to); 1360 } 1361 #endif 1362 return EXIT_SUCCESS; 1363 } 1364 argc -= optind; 1365 argv += optind; 1366 if (argc != 1) { 1367 usermgmt_usage("useradd"); 1368 } 1369 checkeuid(); 1370 return adduser(*argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1371 } 1372 1373 #ifdef EXTENSIONS 1374 #define MOD_OPT_EXTENSIONS "p:vL:" 1375 #else 1376 #define MOD_OPT_EXTENSIONS 1377 #endif 1378 1379 int 1380 usermod(int argc, char **argv) 1381 { 1382 user_t u; 1383 char newuser[MaxUserNameLen + 1]; 1384 int c, have_new_user; 1385 1386 (void) memset(&u, 0, sizeof(u)); 1387 (void) memset(newuser, 0, sizeof(newuser)); 1388 read_defaults(&u); 1389 free(u.u_primgrp); 1390 u.u_primgrp = NULL; 1391 have_new_user = 0; 1392 while ((c = getopt(argc, argv, "G:c:d:e:f:g:l:mos:u:" MOD_OPT_EXTENSIONS)) != -1) { 1393 switch(c) { 1394 case 'G': 1395 while ((u.u_groupv[u.u_groupc] = strsep(&optarg, ",")) != NULL && 1396 u.u_groupc < NGROUPS_MAX - 2) { 1397 if (u.u_groupv[u.u_groupc][0] != 0) { 1398 u.u_groupc++; 1399 } 1400 } 1401 if (optarg != NULL) { 1402 warnx("Truncated list of secondary groups to %d entries", NGROUPS_MAX - 2); 1403 } 1404 u.u_flags |= F_SECGROUP; 1405 break; 1406 case 'c': 1407 memsave(&u.u_comment, optarg, strlen(optarg)); 1408 u.u_flags |= F_COMMENT; 1409 break; 1410 case 'd': 1411 memsave(&u.u_home, optarg, strlen(optarg)); 1412 u.u_flags |= F_HOMEDIR; 1413 break; 1414 case 'e': 1415 memsave(&u.u_expire, optarg, strlen(optarg)); 1416 u.u_flags |= F_EXPIRE; 1417 break; 1418 case 'f': 1419 u.u_inactive = atoi(optarg); 1420 u.u_flags |= F_INACTIVE; 1421 break; 1422 case 'g': 1423 memsave(&u.u_primgrp, optarg, strlen(optarg)); 1424 u.u_flags |= F_GROUP; 1425 break; 1426 case 'l': 1427 (void) strlcpy(newuser, optarg, sizeof(newuser)); 1428 have_new_user = 1; 1429 u.u_flags |= F_USERNAME; 1430 break; 1431 #ifdef EXTENSIONS 1432 case 'L': 1433 memsave(&u.u_class, optarg, strlen(optarg)); 1434 u.u_flags |= F_CLASS; 1435 break; 1436 #endif 1437 case 'm': 1438 u.u_flags |= F_MKDIR; 1439 break; 1440 case 'o': 1441 u.u_flags |= F_DUPUID; 1442 break; 1443 #ifdef EXTENSIONS 1444 case 'p': 1445 memsave(&u.u_password, optarg, strlen(optarg)); 1446 u.u_flags |= F_PASSWORD; 1447 break; 1448 #endif 1449 case 's': 1450 memsave(&u.u_shell, optarg, strlen(optarg)); 1451 u.u_flags |= F_SHELL; 1452 break; 1453 case 'u': 1454 if (!is_number(optarg)) { 1455 errx(EXIT_FAILURE, "When using [-u uid], the uid must be numeric"); 1456 } 1457 u.u_uid = atoi(optarg); 1458 u.u_flags |= F_UID; 1459 break; 1460 #ifdef EXTENSIONS 1461 case 'v': 1462 verbose = 1; 1463 break; 1464 #endif 1465 } 1466 } 1467 if ((u.u_flags & F_MKDIR) && !(u.u_flags & F_HOMEDIR) && 1468 !(u.u_flags & F_USERNAME)) { 1469 warnx("option 'm' useless without 'd' or 'l' -- ignored"); 1470 u.u_flags &= ~F_MKDIR; 1471 } 1472 argc -= optind; 1473 argv += optind; 1474 if (argc != 1) { 1475 usermgmt_usage("usermod"); 1476 } 1477 checkeuid(); 1478 return moduser(*argv, (have_new_user) ? newuser : *argv, &u) ? 1479 EXIT_SUCCESS : EXIT_FAILURE; 1480 } 1481 1482 #ifdef EXTENSIONS 1483 #define DEL_OPT_EXTENSIONS "Dp:v" 1484 #else 1485 #define DEL_OPT_EXTENSIONS 1486 #endif 1487 1488 int 1489 userdel(int argc, char **argv) 1490 { 1491 struct passwd *pwp; 1492 user_t u; 1493 char password[PasswordLength + 1]; 1494 int defaultfield; 1495 int rmhome; 1496 int bigD; 1497 int c; 1498 1499 (void) memset(&u, 0, sizeof(u)); 1500 read_defaults(&u); 1501 defaultfield = bigD = rmhome = 0; 1502 while ((c = getopt(argc, argv, "r" DEL_OPT_EXTENSIONS)) != -1) { 1503 switch(c) { 1504 #ifdef EXTENSIONS 1505 case 'D': 1506 bigD = 1; 1507 break; 1508 #endif 1509 #ifdef EXTENSIONS 1510 case 'p': 1511 defaultfield = 1; 1512 u.u_preserve = (strcmp(optarg, "true") == 0) ? 1 : 1513 (strcmp(optarg, "yes") == 0) ? 1 : 1514 atoi(optarg); 1515 break; 1516 #endif 1517 case 'r': 1518 rmhome = 1; 1519 break; 1520 #ifdef EXTENSIONS 1521 case 'v': 1522 verbose = 1; 1523 break; 1524 #endif 1525 } 1526 } 1527 #ifdef EXTENSIONS 1528 if (bigD) { 1529 if (defaultfield) { 1530 checkeuid(); 1531 return setdefaults(&u) ? EXIT_SUCCESS : EXIT_FAILURE; 1532 } 1533 (void) printf("preserve\t%s\n", (u.u_preserve) ? "true" : "false"); 1534 return EXIT_SUCCESS; 1535 } 1536 #endif 1537 argc -= optind; 1538 argv += optind; 1539 if (argc != 1) { 1540 usermgmt_usage("userdel"); 1541 } 1542 checkeuid(); 1543 if ((pwp = getpwnam(*argv)) == NULL) { 1544 warnx("No such user `%s'", *argv); 1545 return EXIT_FAILURE; 1546 } 1547 if (rmhome) 1548 (void)removehomedir(pwp->pw_name, pwp->pw_uid, pwp->pw_dir); 1549 if (u.u_preserve) { 1550 u.u_flags |= F_SHELL; 1551 memsave(&u.u_shell, NOLOGIN, strlen(NOLOGIN)); 1552 (void) strlcpy(password, "*", sizeof(password)); 1553 memsave(&u.u_password, password, PasswordLength); 1554 u.u_flags |= F_PASSWORD; 1555 return moduser(*argv, *argv, &u) ? EXIT_SUCCESS : EXIT_FAILURE; 1556 } 1557 return moduser(*argv, *argv, NULL) ? EXIT_SUCCESS : EXIT_FAILURE; 1558 } 1559 1560 #ifdef EXTENSIONS 1561 #define GROUP_ADD_OPT_EXTENSIONS "v" 1562 #else 1563 #define GROUP_ADD_OPT_EXTENSIONS 1564 #endif 1565 1566 /* add a group */ 1567 int 1568 groupadd(int argc, char **argv) 1569 { 1570 int dupgid; 1571 int gid; 1572 int c; 1573 1574 gid = GID_MAX; 1575 dupgid = 0; 1576 while ((c = getopt(argc, argv, "g:o" GROUP_ADD_OPT_EXTENSIONS)) != -1) { 1577 switch(c) { 1578 case 'g': 1579 if (!is_number(optarg)) { 1580 errx(EXIT_FAILURE, "When using [-g gid], the gid must be numeric"); 1581 } 1582 gid = atoi(optarg); 1583 break; 1584 case 'o': 1585 dupgid = 1; 1586 break; 1587 #ifdef EXTENSIONS 1588 case 'v': 1589 verbose = 1; 1590 break; 1591 #endif 1592 } 1593 } 1594 argc -= optind; 1595 argv += optind; 1596 if (argc != 1) { 1597 usermgmt_usage("groupadd"); 1598 } 1599 checkeuid(); 1600 if (gid < 0 && !getnextgid(&gid, LowGid, HighGid)) { 1601 err(EXIT_FAILURE, "can't add group: can't get next gid"); 1602 } 1603 if (!dupgid && getgrgid((gid_t) gid) != NULL) { 1604 errx(EXIT_FAILURE, "can't add group: gid %d is a duplicate", gid); 1605 } 1606 if (!valid_group(*argv)) { 1607 warnx("warning - invalid group name `%s'", *argv); 1608 } 1609 if (!creategid(*argv, gid, "")) { 1610 errx(EXIT_FAILURE, "can't add group: problems with %s file", 1611 _PATH_GROUP); 1612 } 1613 return EXIT_SUCCESS; 1614 } 1615 1616 #ifdef EXTENSIONS 1617 #define GROUP_DEL_OPT_EXTENSIONS "v" 1618 #else 1619 #define GROUP_DEL_OPT_EXTENSIONS 1620 #endif 1621 1622 /* remove a group */ 1623 int 1624 groupdel(int argc, char **argv) 1625 { 1626 int c; 1627 1628 while ((c = getopt(argc, argv, "" GROUP_DEL_OPT_EXTENSIONS)) != -1) { 1629 switch(c) { 1630 #ifdef EXTENSIONS 1631 case 'v': 1632 verbose = 1; 1633 break; 1634 #endif 1635 } 1636 } 1637 argc -= optind; 1638 argv += optind; 1639 if (argc != 1) { 1640 usermgmt_usage("groupdel"); 1641 } 1642 checkeuid(); 1643 if (!modify_gid(*argv, NULL)) { 1644 err(EXIT_FAILURE, "can't change %s file", _PATH_GROUP); 1645 } 1646 return EXIT_SUCCESS; 1647 } 1648 1649 #ifdef EXTENSIONS 1650 #define GROUP_MOD_OPT_EXTENSIONS "v" 1651 #else 1652 #define GROUP_MOD_OPT_EXTENSIONS 1653 #endif 1654 1655 /* modify a group */ 1656 int 1657 groupmod(int argc, char **argv) 1658 { 1659 struct group *grp; 1660 char buf[LINE_MAX]; 1661 char *newname; 1662 char **cpp; 1663 int dupgid; 1664 int gid; 1665 int cc; 1666 int c; 1667 1668 gid = GID_MAX; 1669 dupgid = 0; 1670 newname = NULL; 1671 while ((c = getopt(argc, argv, "g:on:" GROUP_MOD_OPT_EXTENSIONS)) != -1) { 1672 switch(c) { 1673 case 'g': 1674 if (!is_number(optarg)) { 1675 errx(EXIT_FAILURE, "When using [-g gid], the gid must be numeric"); 1676 } 1677 gid = atoi(optarg); 1678 break; 1679 case 'o': 1680 dupgid = 1; 1681 break; 1682 case 'n': 1683 memsave(&newname, optarg, strlen(optarg)); 1684 break; 1685 #ifdef EXTENSIONS 1686 case 'v': 1687 verbose = 1; 1688 break; 1689 #endif 1690 } 1691 } 1692 argc -= optind; 1693 argv += optind; 1694 if (argc != 1) { 1695 usermgmt_usage("groupmod"); 1696 } 1697 checkeuid(); 1698 if (gid < 0 && newname == NULL) { 1699 err(EXIT_FAILURE, "Nothing to change"); 1700 } 1701 if (dupgid && gid < 0) { 1702 err(EXIT_FAILURE, "Duplicate which gid?"); 1703 } 1704 if ((grp = getgrnam(*argv)) == NULL) { 1705 err(EXIT_FAILURE, "can't find group `%s' to modify", *argv); 1706 } 1707 if (newname != NULL && !valid_group(newname)) { 1708 warn("warning - invalid group name `%s'", newname); 1709 } 1710 cc = snprintf(buf, sizeof(buf), "%s:%s:%u:", 1711 (newname) ? newname : grp->gr_name, grp->gr_passwd, 1712 (gid < 0) ? grp->gr_gid : gid); 1713 if (cc >= sizeof(buf) || cc == -1) 1714 err(EXIT_FAILURE, "group `%s' entry too long", grp->gr_name); 1715 1716 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 1717 cc = strlcat(buf, *cpp, sizeof(buf)) + 1; 1718 if (cc >= sizeof(buf)) 1719 err(EXIT_FAILURE, "group `%s' entry too long", 1720 grp->gr_name); 1721 if (cpp[1] == NULL) 1722 buf[cc - 1] = '\n'; 1723 else 1724 buf[cc - 1] = ','; 1725 buf[cc] = '\0'; 1726 } 1727 1728 if (!modify_gid(*argv, buf)) 1729 err(EXIT_FAILURE, "can't change %s file", _PATH_GROUP); 1730 return EXIT_SUCCESS; 1731 } 1732 1733 #ifdef EXTENSIONS 1734 /* display user information */ 1735 int 1736 userinfo(int argc, char **argv) 1737 { 1738 struct passwd *pwp; 1739 struct group *grp; 1740 char **cpp; 1741 int exists; 1742 int i; 1743 1744 exists = 0; 1745 while ((i = getopt(argc, argv, "ev")) != -1) { 1746 switch(i) { 1747 case 'e': 1748 exists = 1; 1749 break; 1750 case 'v': 1751 verbose = 1; 1752 break; 1753 } 1754 } 1755 argc -= optind; 1756 argv += optind; 1757 if (argc != 1) { 1758 usermgmt_usage("userinfo"); 1759 } 1760 pwp = find_user_info(*argv); 1761 if (exists) { 1762 exit((pwp) ? EXIT_SUCCESS : EXIT_FAILURE); 1763 } 1764 if (pwp == NULL) { 1765 errx(EXIT_FAILURE, "can't find user `%s'", *argv); 1766 } 1767 (void) printf("login\t%s\n", pwp->pw_name); 1768 (void) printf("passwd\t%s\n", pwp->pw_passwd); 1769 (void) printf("uid\t%u\n", pwp->pw_uid); 1770 if ((grp = getgrgid(pwp->pw_gid)) == NULL) 1771 (void) printf("groups\t%u", pwp->pw_gid); 1772 else 1773 (void) printf("groups\t%s", grp->gr_name); 1774 while ((grp = getgrent()) != NULL) { 1775 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 1776 if (strcmp(*cpp, *argv) == 0 && grp->gr_gid != pwp->pw_gid) 1777 (void) printf(" %s", grp->gr_name); 1778 } 1779 } 1780 (void) fputc('\n', stdout); 1781 (void) printf("change\t%s", pwp->pw_change ? ctime(&pwp->pw_change) : "NEVER\n"); 1782 #ifdef EXTENSIONS 1783 (void) printf("class\t%s\n", pwp->pw_class); 1784 #endif 1785 (void) printf("gecos\t%s\n", pwp->pw_gecos); 1786 (void) printf("dir\t%s\n", pwp->pw_dir); 1787 (void) printf("shell\t%s\n", pwp->pw_shell); 1788 (void) printf("expire\t%s", pwp->pw_expire ? ctime(&pwp->pw_expire) : "NEVER\n"); 1789 return EXIT_SUCCESS; 1790 } 1791 #endif 1792 1793 #ifdef EXTENSIONS 1794 /* display user information */ 1795 int 1796 groupinfo(int argc, char **argv) 1797 { 1798 struct group *grp; 1799 char **cpp; 1800 int exists; 1801 int i; 1802 1803 exists = 0; 1804 while ((i = getopt(argc, argv, "ev")) != -1) { 1805 switch(i) { 1806 case 'e': 1807 exists = 1; 1808 break; 1809 case 'v': 1810 verbose = 1; 1811 break; 1812 } 1813 } 1814 argc -= optind; 1815 argv += optind; 1816 if (argc != 1) { 1817 usermgmt_usage("groupinfo"); 1818 } 1819 grp = find_group_info(*argv); 1820 if (exists) { 1821 exit((grp) ? EXIT_SUCCESS : EXIT_FAILURE); 1822 } 1823 if (grp == NULL) { 1824 errx(EXIT_FAILURE, "can't find group `%s'", *argv); 1825 } 1826 (void) printf("name\t%s\n", grp->gr_name); 1827 (void) printf("passwd\t%s\n", grp->gr_passwd); 1828 (void) printf("gid\t%u\n", grp->gr_gid); 1829 (void) printf("members\t"); 1830 for (cpp = grp->gr_mem ; *cpp ; cpp++) { 1831 (void) printf("%s ", *cpp); 1832 } 1833 (void) fputc('\n', stdout); 1834 return EXIT_SUCCESS; 1835 } 1836 #endif 1837