pw_user.c revision 52502
1/*- 2 * Copyright (C) 1996 3 * David L. Nugent. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28#ifndef lint 29static const char rcsid[] = 30 "$FreeBSD: head/usr.sbin/pw/pw_user.c 52502 1999-10-26 04:27:14Z davidn $"; 31#endif /* not lint */ 32 33#include <ctype.h> 34#include <err.h> 35#include <fcntl.h> 36#include <sys/param.h> 37#include <dirent.h> 38#include <paths.h> 39#include <termios.h> 40#include <sys/types.h> 41#include <sys/time.h> 42#include <sys/resource.h> 43#include <unistd.h> 44#include <utmp.h> 45#if defined(USE_MD5RAND) 46#include <md5.h> 47#endif 48#include "pw.h" 49#include "bitmap.h" 50 51#if (MAXLOGNAME-1) > UT_NAMESIZE 52#define LOGNAMESIZE UT_NAMESIZE 53#else 54#define LOGNAMESIZE (MAXLOGNAME-1) 55#endif 56 57static int randinit; 58 59static int print_user(struct passwd * pwd, int pretty, int v7); 60static uid_t pw_uidpolicy(struct userconf * cnf, struct cargs * args); 61static uid_t pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer); 62static time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args); 63static time_t pw_exppolicy(struct userconf * cnf, struct cargs * args); 64static char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user); 65static char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell); 66static char *pw_password(struct userconf * cnf, struct cargs * args, char const * user); 67static char *shell_path(char const * path, char *shells[], char *sh); 68static void rmat(uid_t uid); 69static void rmskey(char const * name); 70 71/*- 72 * -C config configuration file 73 * -q quiet operation 74 * -n name login name 75 * -u uid user id 76 * -c comment user name/comment 77 * -d directory home directory 78 * -e date account expiry date 79 * -p date password expiry date 80 * -g grp primary group 81 * -G grp1,grp2 additional groups 82 * -m [ -k dir ] create and set up home 83 * -s shell name of login shell 84 * -o duplicate uid ok 85 * -L class user class 86 * -l name new login name 87 * -h fd password filehandle 88 * -F force print or add 89 * Setting defaults: 90 * -D set user defaults 91 * -b dir default home root dir 92 * -e period default expiry period 93 * -p period default password change period 94 * -g group default group 95 * -G grp1,grp2.. default additional groups 96 * -L class default login class 97 * -k dir default home skeleton 98 * -s shell default shell 99 * -w method default password method 100 */ 101 102int 103pw_user(struct userconf * cnf, int mode, struct cargs * args) 104{ 105 int rc; 106 char *p = NULL; 107 struct carg *a_name; 108 struct carg *a_uid; 109 struct carg *arg; 110 struct passwd *pwd = NULL; 111 struct group *grp; 112 struct stat st; 113 char line[_PASSWORD_LEN+1]; 114 115 static struct passwd fakeuser = 116 { 117 NULL, 118 "*", 119 -1, 120 -1, 121 0, 122 "", 123 "User &", 124 "/bin/sh", 125 0, 126 0, 127 0 128 }; 129 130 /* 131 * With M_NEXT, we only need to return the 132 * next uid to stdout 133 */ 134 if (mode == M_NEXT) 135 { 136 uid_t next = pw_uidpolicy(cnf, args); 137 if (getarg(args, 'q')) 138 return next; 139 printf("%ld:", (long)next); 140 pw_group(cnf, mode, args); 141 return EXIT_SUCCESS; 142 } 143 144 /* 145 * We can do all of the common legwork here 146 */ 147 148 if ((arg = getarg(args, 'b')) != NULL) { 149 cnf->home = arg->val; 150 } 151 152 /* 153 * If we'll need to use it or we're updating it, 154 * then create the base home directory if necessary 155 */ 156 if (arg != NULL || getarg(args, 'm') != NULL) { 157 int l = strlen(cnf->home); 158 159 if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */ 160 cnf->home[--l] = '\0'; 161 162 if (l < 2 || *cnf->home != '/') /* Check for absolute path name */ 163 errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home); 164 165 if (stat(cnf->home, &st) == -1) { 166 char dbuf[MAXPATHLEN]; 167 168 /* 169 * This is a kludge especially for Joerg :) 170 * If the home directory would be created in the root partition, then 171 * we really create it under /usr which is likely to have more space. 172 * But we create a symlink from cnf->home -> "/usr" -> cnf->home 173 */ 174 if (strchr(cnf->home+1, '/') == NULL) { 175 strcpy(dbuf, "/usr"); 176 strncat(dbuf, cnf->home, MAXPATHLEN-5); 177 if (mkdir(dbuf, 0755) != -1 || errno == EEXIST) { 178 chown(dbuf, 0, 0); 179 symlink(dbuf, cnf->home); 180 } 181 /* If this falls, fall back to old method */ 182 } 183 p = strncpy(dbuf, cnf->home, sizeof dbuf); 184 dbuf[MAXPATHLEN-1] = '\0'; 185 if (stat(dbuf, &st) == -1) { 186 while ((p = strchr(++p, '/')) != NULL) { 187 *p = '\0'; 188 if (stat(dbuf, &st) == -1) { 189 if (mkdir(dbuf, 0755) == -1) 190 goto direrr; 191 chown(dbuf, 0, 0); 192 } else if (!S_ISDIR(st.st_mode)) 193 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf); 194 *p = '/'; 195 } 196 } 197 if (stat(dbuf, &st) == -1) { 198 if (mkdir(dbuf, 0755) == -1) { 199 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf); 200 } 201 chown(dbuf, 0, 0); 202 } 203 } else if (!S_ISDIR(st.st_mode)) 204 errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home); 205 } 206 207 208 if ((arg = getarg(args, 'e')) != NULL) 209 cnf->expire_days = atoi(arg->val); 210 211 if ((arg = getarg(args, 'y')) != NULL) 212 cnf->nispasswd = arg->val; 213 214 if ((arg = getarg(args, 'p')) != NULL && arg->val) 215 cnf->password_days = atoi(arg->val); 216 217 if ((arg = getarg(args, 'g')) != NULL) { 218 p = arg->val; 219 if ((grp = GETGRNAM(p)) == NULL) { 220 if (!isdigit(*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 221 errx(EX_NOUSER, "group `%s' does not exist", p); 222 } 223 cnf->default_group = newstr(grp->gr_name); 224 } 225 if ((arg = getarg(args, 'L')) != NULL) 226 cnf->default_class = pw_checkname((u_char *)arg->val, 0); 227 228 if ((arg = getarg(args, 'G')) != NULL && arg->val) { 229 int i = 0; 230 231 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) { 232 if ((grp = GETGRNAM(p)) == NULL) { 233 if (!isdigit(*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 234 errx(EX_NOUSER, "group `%s' does not exist", p); 235 } 236 if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1) 237 cnf->groups[i++] = newstr(grp->gr_name); 238 } 239 while (i < cnf->numgroups) 240 cnf->groups[i++] = NULL; 241 } 242 if ((arg = getarg(args, 'k')) != NULL) { 243 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode)) 244 errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir); 245 } 246 if ((arg = getarg(args, 's')) != NULL) 247 cnf->shell_default = arg->val; 248 249 if (mode == M_ADD && getarg(args, 'D')) { 250 if (getarg(args, 'n') != NULL) 251 errx(EX_DATAERR, "can't combine `-D' with `-n name'"); 252 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 253 if ((cnf->min_uid = (uid_t) atoi(p)) == 0) 254 cnf->min_uid = 1000; 255 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid) 256 cnf->max_uid = 32000; 257 } 258 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 259 if ((cnf->min_gid = (gid_t) atoi(p)) == 0) 260 cnf->min_gid = 1000; 261 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid) 262 cnf->max_gid = 32000; 263 } 264 if ((arg = getarg(args, 'w')) != NULL) 265 cnf->default_password = boolean_val(arg->val, cnf->default_password); 266 267 arg = getarg(args, 'C'); 268 if (write_userconfig(arg ? arg->val : NULL)) 269 return EXIT_SUCCESS; 270 warn("config update"); 271 return EX_IOERR; 272 } 273 if (mode == M_PRINT && getarg(args, 'a')) { 274 int pretty = getarg(args, 'P') != NULL; 275 int v7 = getarg(args, '7') != NULL; 276 277 SETPWENT(); 278 while ((pwd = GETPWENT()) != NULL) 279 print_user(pwd, pretty, v7); 280 ENDPWENT(); 281 return EXIT_SUCCESS; 282 } 283 if ((a_name = getarg(args, 'n')) != NULL) 284 pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0)); 285 a_uid = getarg(args, 'u'); 286 287 if (a_uid == NULL) { 288 if (a_name == NULL) 289 errx(EX_DATAERR, "user name or id required"); 290 291 /* 292 * Determine whether 'n' switch is name or uid - we don't 293 * really don't really care which we have, but we need to 294 * know. 295 */ 296 if (mode != M_ADD && pwd == NULL 297 && strspn(a_name->val, "0123456789") == strlen(a_name->val) 298 && atoi(a_name->val) > 0) { /* Assume uid */ 299 (a_uid = a_name)->ch = 'u'; 300 a_name = NULL; 301 } 302 } 303 /* 304 * Update, delete & print require that the user exists 305 */ 306 if (mode == M_UPDATE || mode == M_DELETE || mode == M_PRINT) { 307 if (a_name == NULL && pwd == NULL) /* Try harder */ 308 pwd = GETPWUID(atoi(a_uid->val)); 309 310 if (pwd == NULL) { 311 if (mode == M_PRINT && getarg(args, 'F')) { 312 fakeuser.pw_name = a_name ? a_name->val : "nouser"; 313 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1; 314 return print_user(&fakeuser, 315 getarg(args, 'P') != NULL, 316 getarg(args, '7') != NULL); 317 } 318 if (a_name == NULL) 319 errx(EX_NOUSER, "no such uid `%s'", a_uid->val); 320 errx(EX_NOUSER, "no such user `%s'", a_name->val); 321 } 322 if (a_name == NULL) /* May be needed later */ 323 a_name = addarg(args, 'n', newstr(pwd->pw_name)); 324 325 /* 326 * Handle deletions now 327 */ 328 if (mode == M_DELETE) { 329 char file[MAXPATHLEN]; 330 char home[MAXPATHLEN]; 331 uid_t uid = pwd->pw_uid; 332 333 if (strcmp(pwd->pw_name, "root") == 0) 334 errx(EX_DATAERR, "cannot remove user 'root'"); 335 336 if (!PWALTDIR()) { 337 /* 338 * Remove skey record from /etc/skeykeys 339 */ 340 341 rmskey(pwd->pw_name); 342 343 /* 344 * Remove crontabs 345 */ 346 sprintf(file, "/var/cron/tabs/%s", pwd->pw_name); 347 if (access(file, F_OK) == 0) { 348 sprintf(file, "crontab -u %s -r", pwd->pw_name); 349 system(file); 350 } 351 } 352 /* 353 * Save these for later, since contents of pwd may be 354 * invalidated by deletion 355 */ 356 sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name); 357 strncpy(home, pwd->pw_dir, sizeof home); 358 home[sizeof home - 1] = '\0'; 359 360 rc = delpwent(pwd); 361 if (rc == -1) 362 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name); 363 else if (rc != 0) { 364 warnc(rc, "passwd update"); 365 return EX_IOERR; 366 } 367 368 if (cnf->nispasswd && *cnf->nispasswd=='/') { 369 rc = delnispwent(cnf->nispasswd, a_name->val); 370 if (rc == -1) 371 warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name); 372 else if (rc != 0) 373 warnc(rc, "WARNING: NIS passwd update"); 374 /* non-fatal */ 375 } 376 377 editgroups(a_name->val, NULL); 378 379 pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid); 380 381 if (!PWALTDIR()) { 382 /* 383 * Remove mail file 384 */ 385 remove(file); 386 387 /* 388 * Remove at jobs 389 */ 390 if (getpwuid(uid) == NULL) 391 rmat(uid); 392 393 /* 394 * Remove home directory and contents 395 */ 396 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) { 397 if (stat(home, &st) != -1) { 398 rm_r(home, uid); 399 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved", 400 a_name->val, (long) uid, home, 401 stat(home, &st) == -1 ? "" : "not completely "); 402 } 403 } 404 } 405 return EXIT_SUCCESS; 406 } else if (mode == M_PRINT) 407 return print_user(pwd, 408 getarg(args, 'P') != NULL, 409 getarg(args, '7') != NULL); 410 411 /* 412 * The rest is edit code 413 */ 414 if ((arg = getarg(args, 'l')) != NULL) { 415 if (strcmp(pwd->pw_name, "root") == 0) 416 errx(EX_DATAERR, "can't rename `root' account"); 417 pwd->pw_name = pw_checkname((u_char *)arg->val, 0); 418 } 419 if ((arg = getarg(args, 'u')) != NULL && isdigit(*arg->val)) { 420 pwd->pw_uid = (uid_t) atol(arg->val); 421 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0) 422 errx(EX_DATAERR, "can't change uid of `root' account"); 423 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 424 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name); 425 } 426 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) /* Already checked this */ 427 pwd->pw_gid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid; 428 429 if ((arg = getarg(args, 'p')) != NULL) { 430 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) 431 pwd->pw_change = 0; 432 else { 433 time_t now = time(NULL); 434 time_t expire = parse_date(now, arg->val); 435 436 if (now == expire) 437 errx(EX_DATAERR, "invalid password change date `%s'", arg->val); 438 pwd->pw_change = expire; 439 } 440 } 441 if ((arg = getarg(args, 'e')) != NULL) { 442 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) 443 pwd->pw_expire = 0; 444 else { 445 time_t now = time(NULL); 446 time_t expire = parse_date(now, arg->val); 447 448 if (now == expire) 449 errx(EX_DATAERR, "invalid account expiry date `%s'", arg->val); 450 pwd->pw_expire = expire; 451 } 452 } 453 if ((arg = getarg(args, 's')) != NULL) 454 pwd->pw_shell = shell_path(cnf->shelldir, cnf->shells, arg->val); 455 456 if (getarg(args, 'L')) 457 pwd->pw_class = cnf->default_class; 458 459 if ((arg = getarg(args, 'd')) != NULL) { 460 if (stat(pwd->pw_dir = arg->val, &st) == -1) { 461 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0) 462 warnx("WARNING: home `%s' does not exist", pwd->pw_dir); 463 } else if (!S_ISDIR(st.st_mode)) 464 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir); 465 } 466 467 if ((arg = getarg(args, 'w')) != NULL && getarg(args, 'h') == NULL) 468 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 469 470 } else { 471 if (a_name == NULL) /* Required */ 472 errx(EX_DATAERR, "login name required"); 473 else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */ 474 errx(EX_DATAERR, "login name `%s' already exists", a_name->val); 475 476 /* 477 * Now, set up defaults for a new user 478 */ 479 pwd = &fakeuser; 480 pwd->pw_name = a_name->val; 481 pwd->pw_class = cnf->default_class ? cnf->default_class : ""; 482 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 483 pwd->pw_uid = pw_uidpolicy(cnf, args); 484 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid); 485 pwd->pw_change = pw_pwdpolicy(cnf, args); 486 pwd->pw_expire = pw_exppolicy(cnf, args); 487 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name); 488 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL); 489 490 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 491 warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name); 492 } 493 494 /* 495 * Shared add/edit code 496 */ 497 if ((arg = getarg(args, 'c')) != NULL) 498 pwd->pw_gecos = pw_checkname((u_char *)arg->val, 1); 499 500 if ((arg = getarg(args, 'h')) != NULL) { 501 if (strcmp(arg->val, "-") == 0) 502 pwd->pw_passwd = "*"; /* No access */ 503 else { 504 int fd = atoi(arg->val); 505 int b; 506 int istty = isatty(fd); 507 struct termios t; 508 509 if (istty) { 510 if (tcgetattr(fd, &t) == -1) 511 istty = 0; 512 else { 513 struct termios n = t; 514 515 /* Disable echo */ 516 n.c_lflag &= ~(ECHO); 517 tcsetattr(fd, TCSANOW, &n); 518 printf("%sassword for user %s:", (mode == M_UPDATE) ? "New p" : "P", pwd->pw_name); 519 fflush(stdout); 520 } 521 } 522 b = read(fd, line, sizeof(line) - 1); 523 if (istty) { /* Restore state */ 524 tcsetattr(fd, TCSANOW, &t); 525 fputc('\n', stdout); 526 fflush(stdout); 527 } 528 if (b < 0) { 529 warn("-h file descriptor"); 530 return EX_IOERR; 531 } 532 line[b] = '\0'; 533 if ((p = strpbrk(line, " \t\r\n")) != NULL) 534 *p = '\0'; 535 if (!*line) 536 errx(EX_DATAERR, "empty password read on file descriptor %d", fd); 537 pwd->pw_passwd = pw_pwcrypt(line); 538 } 539 } 540 541 /* 542 * Special case: -N only displays & exits 543 */ 544 if (getarg(args, 'N') != NULL) 545 return print_user(pwd, 546 getarg(args, 'P') != NULL, 547 getarg(args, '7') != NULL); 548 549 if (mode == M_ADD) { 550 rc = addpwent(pwd); 551 if (rc == -1) { 552 warnx("user '%s' already exists", pwd->pw_name); 553 return EX_IOERR; 554 } else if (rc != 0) { 555 warnc(rc, "passwd file update"); 556 return EX_IOERR; 557 } 558 if (cnf->nispasswd && *cnf->nispasswd=='/') { 559 rc = addnispwent(cnf->nispasswd, pwd); 560 if (rc == -1) 561 warnx("User '%s' already exists in NIS passwd", pwd->pw_name); 562 else 563 warnc(rc, "NIS passwd update"); 564 /* NOTE: we treat NIS-only update errors as non-fatal */ 565 } 566 } else if (mode == M_UPDATE) { 567 rc = chgpwent(a_name->val, pwd); 568 if (rc == -1) { 569 warnx("user '%s' does not exist (NIS?)", pwd->pw_name); 570 return EX_IOERR; 571 } else if (rc != 0) { 572 warnc(rc, "passwd file update"); 573 return EX_IOERR; 574 } 575 if ( cnf->nispasswd && *cnf->nispasswd=='/') { 576 rc = chgnispwent(cnf->nispasswd, a_name->val, pwd); 577 if (rc == -1) 578 warn("User '%s' not found in NIS passwd", pwd->pw_name); 579 else 580 warnc(rc, "NIS passwd update"); 581 /* NOTE: NIS-only update errors are not fatal */ 582 } 583 } 584 585 /* 586 * Ok, user is created or changed - now edit group file 587 */ 588 589 if (mode == M_ADD || getarg(args, 'G') != NULL) 590 editgroups(pwd->pw_name, cnf->groups); 591 592 /* pwd may have been invalidated */ 593 if ((pwd = GETPWNAM(a_name->val)) == NULL) 594 errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val); 595 596 grp = GETGRGID(pwd->pw_gid); 597 pw_log(cnf, mode, W_USER, "%s(%ld):%s(%d):%s:%s:%s", 598 pwd->pw_name, (long) pwd->pw_uid, 599 grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1), 600 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 601 602 /* 603 * If adding, let's touch and chown the user's mail file. This is not 604 * strictly necessary under BSD with a 0755 maildir but it also 605 * doesn't hurt anything to create the empty mailfile 606 */ 607 if (mode == M_ADD) { 608 FILE *fp; 609 610 if (!PWALTDIR()) { 611 sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name); 612 close(open(line, O_RDWR | O_CREAT, 0600)); /* Preserve contents & 613 * mtime */ 614 chown(line, pwd->pw_uid, pwd->pw_gid); 615 616 /* 617 * Send mail to the new user as well, if we are asked to 618 */ 619 if (cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) { 620 FILE *pfp = popen(_PATH_SENDMAIL " -t", "w"); 621 622 if (pfp == NULL) 623 warn("sendmail"); 624 else { 625 fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name); 626 while (fgets(line, sizeof(line), fp) != NULL) { 627 /* Do substitutions? */ 628 fputs(line, pfp); 629 } 630 pclose(pfp); 631 pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent", 632 pwd->pw_name, (long) pwd->pw_uid); 633 } 634 fclose(fp); 635 } 636 } 637 } 638 /* 639 * Finally, let's create and populate the user's home directory. Note 640 * that this also `works' for editing users if -m is used, but 641 * existing files will *not* be overwritten. 642 */ 643 if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) { 644 copymkdir(pwd->pw_dir, cnf->dotdir, 0755, pwd->pw_uid, pwd->pw_gid); 645 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made", 646 pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir); 647 } 648 return EXIT_SUCCESS; 649} 650 651 652static uid_t 653pw_uidpolicy(struct userconf * cnf, struct cargs * args) 654{ 655 struct passwd *pwd; 656 uid_t uid = (uid_t) - 1; 657 struct carg *a_uid = getarg(args, 'u'); 658 659 /* 660 * Check the given uid, if any 661 */ 662 if (a_uid != NULL) { 663 uid = (uid_t) atol(a_uid->val); 664 665 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL) 666 errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid); 667 } else { 668 struct bitmap bm; 669 670 /* 671 * We need to allocate the next available uid under one of 672 * two policies a) Grab the first unused uid b) Grab the 673 * highest possible unused uid 674 */ 675 if (cnf->min_uid >= cnf->max_uid) { /* Sanity 676 * claus^H^H^H^Hheck */ 677 cnf->min_uid = 1000; 678 cnf->max_uid = 32000; 679 } 680 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1); 681 682 /* 683 * Now, let's fill the bitmap from the password file 684 */ 685 SETPWENT(); 686 while ((pwd = GETPWENT()) != NULL) 687 if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid) 688 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid); 689 ENDPWENT(); 690 691 /* 692 * Then apply the policy, with fallback to reuse if necessary 693 */ 694 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid) 695 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid); 696 697 /* 698 * Another sanity check 699 */ 700 if (uid < cnf->min_uid || uid > cnf->max_uid) 701 errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used"); 702 bm_dealloc(&bm); 703 } 704 return uid; 705} 706 707 708static uid_t 709pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer) 710{ 711 struct group *grp; 712 gid_t gid = (uid_t) - 1; 713 struct carg *a_gid = getarg(args, 'g'); 714 715 /* 716 * If no arg given, see if default can help out 717 */ 718 if (a_gid == NULL && cnf->default_group && *cnf->default_group) 719 a_gid = addarg(args, 'g', cnf->default_group); 720 721 /* 722 * Check the given gid, if any 723 */ 724 SETGRENT(); 725 if (a_gid != NULL) { 726 if ((grp = GETGRNAM(a_gid->val)) == NULL) { 727 gid = (gid_t) atol(a_gid->val); 728 if ((gid == 0 && !isdigit(*a_gid->val)) || (grp = GETGRGID(gid)) == NULL) 729 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val); 730 } 731 gid = grp->gr_gid; 732 } else if ((grp = GETGRNAM(nam)) != NULL && grp->gr_mem[0] == NULL) { 733 gid = grp->gr_gid; /* Already created? Use it anyway... */ 734 } else { 735 struct cargs grpargs; 736 char tmp[32]; 737 738 LIST_INIT(&grpargs); 739 addarg(&grpargs, 'n', nam); 740 741 /* 742 * We need to auto-create a group with the user's name. We 743 * can send all the appropriate output to our sister routine 744 * bit first see if we can create a group with gid==uid so we 745 * can keep the user and group ids in sync. We purposely do 746 * NOT check the gid range if we can force the sync. If the 747 * user's name dups an existing group, then the group add 748 * function will happily handle that case for us and exit. 749 */ 750 if (GETGRGID(prefer) == NULL) { 751 sprintf(tmp, "%lu", (unsigned long) prefer); 752 addarg(&grpargs, 'g', tmp); 753 } 754 if (getarg(args, 'N')) 755 { 756 addarg(&grpargs, 'N', NULL); 757 addarg(&grpargs, 'q', NULL); 758 gid = pw_group(cnf, M_NEXT, &grpargs); 759 } 760 else 761 { 762 pw_group(cnf, M_ADD, &grpargs); 763 if ((grp = GETGRNAM(nam)) != NULL) 764 gid = grp->gr_gid; 765 } 766 a_gid = grpargs.lh_first; 767 while (a_gid != NULL) { 768 struct carg *t = a_gid->list.le_next; 769 LIST_REMOVE(a_gid, list); 770 a_gid = t; 771 } 772 } 773 ENDGRENT(); 774 return gid; 775} 776 777 778static time_t 779pw_pwdpolicy(struct userconf * cnf, struct cargs * args) 780{ 781 time_t result = 0; 782 time_t now = time(NULL); 783 struct carg *arg = getarg(args, 'p'); 784 785 if (arg != NULL) { 786 if ((result = parse_date(now, arg->val)) == now) 787 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 788 } else if (cnf->password_days > 0) 789 result = now + ((long) cnf->password_days * 86400L); 790 return result; 791} 792 793 794static time_t 795pw_exppolicy(struct userconf * cnf, struct cargs * args) 796{ 797 time_t result = 0; 798 time_t now = time(NULL); 799 struct carg *arg = getarg(args, 'e'); 800 801 if (arg != NULL) { 802 if ((result = parse_date(now, arg->val)) == now) 803 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 804 } else if (cnf->expire_days > 0) 805 result = now + ((long) cnf->expire_days * 86400L); 806 return result; 807} 808 809 810static char * 811pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user) 812{ 813 struct carg *arg = getarg(args, 'd'); 814 815 if (arg) 816 return arg->val; 817 else { 818 static char home[128]; 819 820 if (cnf->home == NULL || *cnf->home == '\0') 821 errx(EX_CONFIG, "no base home directory set"); 822 sprintf(home, "%s/%s", cnf->home, user); 823 return home; 824 } 825} 826 827static char * 828shell_path(char const * path, char *shells[], char *sh) 829{ 830 if (sh != NULL && (*sh == '/' || *sh == '\0')) 831 return sh; /* specified full path or forced none */ 832 else { 833 char *p; 834 char paths[_UC_MAXLINE]; 835 836 /* 837 * We need to search paths 838 */ 839 strncpy(paths, path, sizeof paths); 840 paths[sizeof paths - 1] = '\0'; 841 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) { 842 int i; 843 static char shellpath[256]; 844 845 if (sh != NULL) { 846 sprintf(shellpath, "%s/%s", p, sh); 847 if (access(shellpath, X_OK) == 0) 848 return shellpath; 849 } else 850 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) { 851 sprintf(shellpath, "%s/%s", p, shells[i]); 852 if (access(shellpath, X_OK) == 0) 853 return shellpath; 854 } 855 } 856 if (sh == NULL) 857 errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh); 858 errx(EX_CONFIG, "no default shell available or defined"); 859 return NULL; 860 } 861} 862 863 864static char * 865pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell) 866{ 867 char *sh = newshell; 868 struct carg *arg = getarg(args, 's'); 869 870 if (newshell == NULL && arg != NULL) 871 sh = arg->val; 872 return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default); 873} 874 875static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ."; 876 877char * 878pw_pwcrypt(char *password) 879{ 880 int i; 881 char salt[12]; 882 883 static char buf[256]; 884 885 /* 886 * Calculate a salt value 887 */ 888 if (!randinit) { 889 randinit = 1; 890#ifdef __FreeBSD__ 891 srandomdev(); 892#else 893 srandom((unsigned long) (time(NULL) ^ getpid())); 894#endif 895 } 896 for (i = 0; i < 8; i++) 897 salt[i] = chars[random() % 63]; 898 salt[i] = '\0'; 899 900 return strcpy(buf, crypt(password, salt)); 901} 902 903#if defined(USE_MD5RAND) 904u_char * 905pw_getrand(u_char *buf, int len) /* cryptographically secure rng */ 906{ 907 int i; 908 for (i=0;i<len;i+=16) { 909 u_char ubuf[16]; 910 911 MD5_CTX md5_ctx; 912 struct timeval tv, tvo; 913 struct rusage ru; 914 int n=0; 915 int t; 916 917 MD5Init (&md5_ctx); 918 t=getpid(); 919 MD5Update (&md5_ctx, (u_char*)&t, sizeof t); 920 t=getppid(); 921 MD5Update (&md5_ctx, (u_char*)&t, sizeof t); 922 gettimeofday (&tvo, NULL); 923 do { 924 getrusage (RUSAGE_SELF, &ru); 925 MD5Update (&md5_ctx, (u_char*)&ru, sizeof ru); 926 gettimeofday (&tv, NULL); 927 MD5Update (&md5_ctx, (u_char*)&tv, sizeof tv); 928 } while (n++<20 || tv.tv_usec-tvo.tv_usec<100*1000); 929 MD5Final (ubuf, &md5_ctx); 930 memcpy(buf+i, ubuf, MIN(16, len-n)); 931 } 932 return buf; 933} 934 935#else /* Portable version */ 936 937static u_char * 938pw_getrand(u_char *buf, int len) 939{ 940 int i; 941 942 for (i = 0; i < len; i++) { 943 unsigned long val = random(); 944 /* Use all bits in the random value */ 945 buf[i]=(u_char)((val >> 24) ^ (val >> 16) ^ (val >> 8) ^ val); 946 } 947 return buf; 948} 949 950#endif 951 952static char * 953pw_password(struct userconf * cnf, struct cargs * args, char const * user) 954{ 955 int i, l; 956 char pwbuf[32]; 957 u_char rndbuf[sizeof pwbuf]; 958 959 switch (cnf->default_password) { 960 case -1: /* Random password */ 961 if (!randinit) { 962 randinit = 1; 963#ifdef __FreeBSD__ 964 srandomdev(); 965#else 966 srandom((unsigned long) (time(NULL) ^ getpid())); 967#endif 968 } 969 l = (random() % 8 + 8); /* 8 - 16 chars */ 970 pw_getrand(rndbuf, l); 971 for (i = 0; i < l; i++) 972 pwbuf[i] = chars[rndbuf[i] % (sizeof(chars)-1)]; 973 pwbuf[i] = '\0'; 974 975 /* 976 * We give this information back to the user 977 */ 978 if (getarg(args, 'h') == NULL && getarg(args, 'N') == NULL) { 979 if (isatty(1)) 980 printf("Password for '%s' is: ", user); 981 printf("%s\n", pwbuf); 982 fflush(stdout); 983 } 984 break; 985 986 case -2: /* No password at all! */ 987 return ""; 988 989 case 0: /* No login - default */ 990 default: 991 return "*"; 992 993 case 1: /* user's name */ 994 strncpy(pwbuf, user, sizeof pwbuf); 995 pwbuf[sizeof pwbuf - 1] = '\0'; 996 break; 997 } 998 return pw_pwcrypt(pwbuf); 999} 1000 1001 1002static int 1003print_user(struct passwd * pwd, int pretty, int v7) 1004{ 1005 if (!pretty) { 1006 char buf[_UC_MAXLINE]; 1007 1008 fmtpwentry(buf, pwd, v7 ? PWF_PASSWD : PWF_STANDARD); 1009 fputs(buf, stdout); 1010 } else { 1011 int j; 1012 char *p; 1013 struct group *grp = GETGRGID(pwd->pw_gid); 1014 char uname[60] = "User &", office[60] = "[None]", 1015 wphone[60] = "[None]", hphone[60] = "[None]"; 1016 char acexpire[32] = "[None]", pwexpire[32] = "[None]"; 1017 struct tm * tptr; 1018 1019 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) { 1020 strncpy(uname, p, sizeof uname); 1021 uname[sizeof uname - 1] = '\0'; 1022 if ((p = strtok(NULL, ",")) != NULL) { 1023 strncpy(office, p, sizeof office); 1024 office[sizeof office - 1] = '\0'; 1025 if ((p = strtok(NULL, ",")) != NULL) { 1026 strncpy(wphone, p, sizeof wphone); 1027 wphone[sizeof wphone - 1] = '\0'; 1028 if ((p = strtok(NULL, "")) != NULL) { 1029 strncpy(hphone, p, sizeof hphone); 1030 hphone[sizeof hphone - 1] = '\0'; 1031 } 1032 } 1033 } 1034 } 1035 /* 1036 * Handle '&' in gecos field 1037 */ 1038 if ((p = strchr(uname, '&')) != NULL) { 1039 int l = strlen(pwd->pw_name); 1040 int m = strlen(p); 1041 1042 memmove(p + l, p + 1, m); 1043 memmove(p, pwd->pw_name, l); 1044 *p = (char) toupper(*p); 1045 } 1046 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL) 1047 strftime(acexpire, sizeof acexpire, "%c", tptr); 1048 if (pwd->pw_change > (time_t)9 && (tptr = localtime(&pwd->pw_change)) != NULL) 1049 strftime(pwexpire, sizeof pwexpire, "%c", tptr); 1050 printf("Login Name: %-15s #%-12ld Group: %-15s #%ld\n" 1051 " Full Name: %s\n" 1052 " Home: %-26.26s Class: %s\n" 1053 " Shell: %-26.26s Office: %s\n" 1054 "Work Phone: %-26.26s Home Phone: %s\n" 1055 "Acc Expire: %-26.26s Pwd Expire: %s\n", 1056 pwd->pw_name, (long) pwd->pw_uid, 1057 grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid, 1058 uname, pwd->pw_dir, pwd->pw_class, 1059 pwd->pw_shell, office, wphone, hphone, 1060 acexpire, pwexpire); 1061 SETGRENT(); 1062 j = 0; 1063 while ((grp=GETGRENT()) != NULL) 1064 { 1065 int i = 0; 1066 while (grp->gr_mem[i] != NULL) 1067 { 1068 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) 1069 { 1070 printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name); 1071 break; 1072 } 1073 ++i; 1074 } 1075 } 1076 ENDGRENT(); 1077 printf("%s\n", j ? "\n" : ""); 1078 } 1079 return EXIT_SUCCESS; 1080} 1081 1082char * 1083pw_checkname(u_char *name, int gecos) 1084{ 1085 int l = 0; 1086 char const *notch = gecos ? ":!@" : " ,\t:+&#%$^()!@~*?<>=|\\/\""; 1087 1088 while (name[l]) { 1089 if (strchr(notch, name[l]) != NULL || name[l] < ' ' || name[l] == 127 || 1090 (!gecos && l==0 && name[l] == '-') || /* leading '-' */ 1091 (!gecos && name[l] & 0x80)) /* 8-bit */ 1092 errx(EX_DATAERR, (name[l] >= ' ' && name[l] < 127) 1093 ? "invalid character `%c' in field" 1094 : "invalid character 0x%02x in field", 1095 name[l]); 1096 ++l; 1097 } 1098 if (!gecos && l > LOGNAMESIZE) 1099 errx(EX_DATAERR, "name too long `%s'", name); 1100 return (char *)name; 1101} 1102 1103 1104static void 1105rmat(uid_t uid) 1106{ 1107 DIR *d = opendir("/var/at/jobs"); 1108 1109 if (d != NULL) { 1110 struct dirent *e; 1111 1112 while ((e = readdir(d)) != NULL) { 1113 struct stat st; 1114 1115 if (strncmp(e->d_name, ".lock", 5) != 0 && 1116 stat(e->d_name, &st) == 0 && 1117 !S_ISDIR(st.st_mode) && 1118 st.st_uid == uid) { 1119 char tmp[MAXPATHLEN]; 1120 1121 sprintf(tmp, "/usr/bin/atrm %s", e->d_name); 1122 system(tmp); 1123 } 1124 } 1125 closedir(d); 1126 } 1127} 1128 1129static void 1130rmskey(char const * name) 1131{ 1132 static const char etcskey[] = "/etc/skeykeys"; 1133 FILE *fp = fopen(etcskey, "r+"); 1134 1135 if (fp != NULL) { 1136 char tmp[1024]; 1137 off_t atofs = 0; 1138 int length = strlen(name); 1139 1140 while (fgets(tmp, sizeof tmp, fp) != NULL) { 1141 if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') { 1142 if (fseek(fp, atofs, SEEK_SET) == 0) { 1143 fwrite("#", 1, 1, fp); /* Comment username out */ 1144 } 1145 break; 1146 } 1147 atofs = ftell(fp); 1148 } 1149 /* 1150 * If we got an error of any sort, don't update! 1151 */ 1152 fclose(fp); 1153 } 1154} 1155 1156