pw_user.c revision 20679
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 * $Id: pw_user.c,v 1.5 1996/12/17 14:15:35 davidn Exp $ 27 */ 28 29#include <unistd.h> 30#include <fcntl.h> 31#include <ctype.h> 32#include <paths.h> 33#include <sys/param.h> 34#include <dirent.h> 35#include <termios.h> 36#include <sys/types.h> 37#include <sys/time.h> 38#include <sys/resource.h> 39#include <md5.h> 40#include "pw.h" 41#include "bitmap.h" 42#include "pwupd.h" 43 44static int print_user(struct passwd * pwd, int pretty); 45static uid_t pw_uidpolicy(struct userconf * cnf, struct cargs * args); 46static uid_t pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer); 47static time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args); 48static time_t pw_exppolicy(struct userconf * cnf, struct cargs * args); 49static char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user); 50static char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell); 51static char *pw_password(struct userconf * cnf, struct cargs * args, char const * user); 52static char *shell_path(char const * path, char *shells[], char *sh); 53static void rmat(uid_t uid); 54 55/*- 56 * -C config configuration file 57 * -q quiet operation 58 * -n name login name 59 * -u uid user id 60 * -c comment user name/comment 61 * -d directory home directory 62 * -e date account expiry date 63 * -p date password expiry date 64 * -g grp primary group 65 * -G grp1,grp2 additional groups 66 * -m [ -k dir ] create and set up home 67 * -s shell name of login shell 68 * -o duplicate uid ok 69 * -L class user class 70 * -l name new login name 71 * -h fd password filehandle 72 * -F force print or add 73 * Setting defaults: 74 * -D set user defaults 75 * -b dir default home root dir 76 * -e period default expiry period 77 * -p period default password change period 78 * -g group default group 79 * -G grp1,grp2.. default additional groups 80 * -L class default login class 81 * -k dir default home skeleton 82 * -s shell default shell 83 * -w method default password method 84 */ 85 86int 87pw_user(struct userconf * cnf, int mode, struct cargs * args) 88{ 89 char *p = NULL; 90 struct carg *a_name; 91 struct carg *a_uid; 92 struct carg *arg; 93 struct passwd *pwd = NULL; 94 struct group *grp; 95 struct stat st; 96 char line[MAXPWLINE]; 97 98 static struct passwd fakeuser = 99 { 100 NULL, 101 "*", 102 -1, 103 -1, 104 0, 105 "", 106 "User &", 107 "/bin/sh", 108 0, 109 0 110 }; 111 112 /* 113 * With M_NEXT, we only need to return the 114 * next uid to stdout 115 */ 116 if (mode == M_NEXT) 117 { 118 uid_t next = pw_uidpolicy(cnf, args); 119 if (getarg(args, 'q')) 120 return next; 121 printf("%ld:", (long)next); 122 pw_group(cnf, mode, args); 123 return EXIT_SUCCESS; 124 } 125 126 /* 127 * We can do all of the common legwork here 128 */ 129 130 if ((arg = getarg(args, 'b')) != NULL) { 131 cnf->home = arg->val; 132 if (stat(cnf->home, &st) == -1 || !S_ISDIR(st.st_mode)) 133 cmderr(EX_OSFILE, "root home `%s' is not a directory or does not exist\n", cnf->home); 134 } 135 if ((arg = getarg(args, 'e')) != NULL) 136 cnf->expire_days = atoi(arg->val); 137 138 if ((arg = getarg(args, 'p')) != NULL && arg->val) 139 cnf->password_days = atoi(arg->val); 140 141 if ((arg = getarg(args, 'g')) != NULL) { 142 p = arg->val; 143 if ((grp = getgrnam(p)) == NULL) { 144 if (!isdigit(*p) || (grp = getgrgid((gid_t) atoi(p))) == NULL) 145 cmderr(EX_NOUSER, "group `%s' does not exist\n", p); 146 } 147 cnf->default_group = newstr(grp->gr_name); 148 } 149 if ((arg = getarg(args, 'L')) != NULL) 150 cnf->default_class = pw_checkname((u_char *)arg->val, 0); 151 152 if ((arg = getarg(args, 'G')) != NULL && arg->val) { 153 int i = 0; 154 155 for (p = strtok(arg->val, ", \t"); i < _UC_MAXGROUPS && p != NULL; p = strtok(NULL, ", \t")) { 156 if ((grp = getgrnam(p)) == NULL) { 157 if (!isdigit(*p) || (grp = getgrgid((gid_t) atoi(p))) == NULL) 158 cmderr(EX_NOUSER, "group `%s' does not exist\n", p); 159 } 160 cnf->groups[i++] = newstr(grp->gr_name); 161 } 162 while (i < _UC_MAXGROUPS) 163 cnf->groups[i++] = NULL; 164 } 165 if ((arg = getarg(args, 'k')) != NULL) { 166 if (stat(cnf->dotdir = arg->val, &st) == -1 || S_ISDIR(st.st_mode)) 167 cmderr(EX_OSFILE, "skeleton `%s' is not a directory or does not exist\n", cnf->dotdir); 168 } 169 if ((arg = getarg(args, 's')) != NULL) 170 cnf->shell_default = arg->val; 171 172 if (mode == M_ADD && getarg(args, 'D')) { 173 if (getarg(args, 'n') != NULL) 174 cmderr(EX_DATAERR, "can't combine `-D' with `-n name'\n"); 175 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 176 if ((cnf->min_uid = (uid_t) atoi(p)) == 0) 177 cnf->min_uid = 1000; 178 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid) 179 cnf->max_uid = 32000; 180 } 181 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 182 if ((cnf->min_gid = (gid_t) atoi(p)) == 0) 183 cnf->min_gid = 1000; 184 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid) 185 cnf->max_gid = 32000; 186 } 187 if ((arg = getarg(args, 'w')) != NULL) 188 cnf->default_password = boolean_val(arg->val, cnf->default_password); 189 190 arg = getarg(args, 'C'); 191 if (write_userconfig(arg ? arg->val : NULL)) 192 return EXIT_SUCCESS; 193 perror("config update"); 194 return EX_IOERR; 195 } 196 if (mode == M_PRINT && getarg(args, 'a')) { 197 int pretty = getarg(args, 'P') != NULL; 198 199 setpwent(); 200 while ((pwd = getpwent()) != NULL) 201 print_user(pwd, pretty); 202 endpwent(); 203 return EXIT_SUCCESS; 204 } 205 if ((a_name = getarg(args, 'n')) != NULL) 206 pwd = getpwnam(pw_checkname((u_char *)a_name->val, 0)); 207 a_uid = getarg(args, 'u'); 208 209 if (a_uid == NULL) { 210 if (a_name == NULL) 211 cmderr(EX_DATAERR, "user name or id required\n"); 212 213 /* 214 * Determine whether 'n' switch is name or uid - we don't 215 * really don't really care which we have, but we need to 216 * know. 217 */ 218 if (mode != M_ADD && pwd == NULL && isdigit(*a_name->val) && atoi(a_name->val) > 0) { /* Assume uid */ 219 (a_uid = a_name)->ch = 'u'; 220 a_name = NULL; 221 } 222 } 223 /* 224 * Update, delete & print require that the user exists 225 */ 226 if (mode == M_UPDATE || mode == M_DELETE || mode == M_PRINT) { 227 if (a_name == NULL && pwd == NULL) /* Try harder */ 228 pwd = getpwuid(atoi(a_uid->val)); 229 230 if (pwd == NULL) { 231 if (mode == M_PRINT && getarg(args, 'F')) { 232 fakeuser.pw_name = a_name ? a_name->val : "nouser"; 233 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1; 234 return print_user(&fakeuser, getarg(args, 'P') != NULL); 235 } 236 if (a_name == NULL) 237 cmderr(EX_NOUSER, "no such uid `%s'\n", a_uid->val); 238 cmderr(EX_NOUSER, "no such user `%s'\n", a_name->val); 239 } 240 if (a_name == NULL) /* May be needed later */ 241 a_name = addarg(args, 'n', newstr(pwd->pw_name)); 242 243 /* 244 * Handle deletions now 245 */ 246 if (mode == M_DELETE) { 247 char file[MAXPATHLEN]; 248 char home[MAXPATHLEN]; 249 uid_t uid = pwd->pw_uid; 250 251 if (strcmp(pwd->pw_name, "root") == 0) 252 cmderr(EX_DATAERR, "cannot remove user 'root'\n"); 253 254 /* 255 * Remove crontabs 256 */ 257 sprintf(file, "/var/cron/tabs/%s", pwd->pw_name); 258 if (access(file, F_OK) == 0) { 259 sprintf(file, "crontab -u %s -r", pwd->pw_name); 260 system(file); 261 } 262 /* 263 * Save these for later, since contents of pwd may be 264 * invalidated by deletion 265 */ 266 sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name); 267 strncpy(home, pwd->pw_dir, sizeof home); 268 home[sizeof home - 1] = '\0'; 269 270 if (!delpwent(pwd)) 271 cmderr(EX_IOERR, "Error updating passwd file: %s\n", strerror(errno)); 272 editgroups(a_name->val, NULL); 273 274 pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid); 275 276 /* 277 * Remove mail file 278 */ 279 remove(file); 280 281 /* 282 * Remove at jobs 283 */ 284 if (getpwuid(uid) == NULL) 285 rmat(uid); 286 287 /* 288 * Remove home directory and contents 289 */ 290 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) { 291 if (stat(home, &st) != -1) { 292 rm_r(home, uid); 293 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved", 294 a_name->val, (long) uid, home, 295 stat(home, &st) == -1 ? "" : "not completely "); 296 } 297 } 298 return EXIT_SUCCESS; 299 } else if (mode == M_PRINT) 300 return print_user(pwd, getarg(args, 'P') != NULL); 301 302 /* 303 * The rest is edit code 304 */ 305 if ((arg = getarg(args, 'l')) != NULL) { 306 if (strcmp(pwd->pw_name, "root") == 0) 307 cmderr(EX_DATAERR, "can't rename `root' account\n"); 308 pwd->pw_name = pw_checkname((u_char *)arg->val, 0); 309 } 310 if ((arg = getarg(args, 'u')) != NULL && isdigit(*arg->val)) { 311 pwd->pw_uid = (uid_t) atol(arg->val); 312 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0) 313 cmderr(EX_DATAERR, "can't change uid of `root' account\n"); 314 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 315 fprintf(stderr, "WARNING: account `%s' will have a uid of 0 (superuser access!)\n", pwd->pw_name); 316 } 317 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) /* Already checked this */ 318 pwd->pw_gid = (gid_t) getgrnam(cnf->default_group)->gr_gid; 319 320 if ((arg = getarg(args, 'p')) != NULL) { 321 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) 322 pwd->pw_change = 0; 323 else { 324 time_t now = time(NULL); 325 time_t expire = parse_date(now, arg->val); 326 327 if (now == expire) 328 cmderr(EX_DATAERR, "Invalid password change date `%s'\n", arg->val); 329 pwd->pw_change = expire; 330 } 331 } 332 if ((arg = getarg(args, 'e')) != NULL) { 333 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) 334 pwd->pw_expire = 0; 335 else { 336 time_t now = time(NULL); 337 time_t expire = parse_date(now, arg->val); 338 339 if (now == expire) 340 cmderr(EX_DATAERR, "Invalid account expiry date `%s'\n", arg->val); 341 pwd->pw_expire = expire; 342 } 343 } 344 if ((arg = getarg(args, 's')) != NULL) 345 pwd->pw_shell = shell_path(cnf->shelldir, cnf->shells, arg->val); 346 347 if (getarg(args, 'L')) 348 pwd->pw_class = cnf->default_class; 349 350 if ((arg = getarg(args, 'w')) != NULL && getarg(args, 'h') == NULL) 351 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 352 353 } else { 354 if (a_name == NULL) /* Required */ 355 cmderr(EX_DATAERR, "login name required\n"); 356 else if ((pwd = getpwnam(a_name->val)) != NULL) /* Exists */ 357 cmderr(EX_DATAERR, "login name `%s' already exists\n", a_name->val); 358 359 /* 360 * Now, set up defaults for a new user 361 */ 362 pwd = &fakeuser; 363 pwd->pw_name = a_name->val; 364 pwd->pw_class = cnf->default_class ? cnf->default_class : ""; 365 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 366 pwd->pw_uid = pw_uidpolicy(cnf, args); 367 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid); 368 pwd->pw_change = pw_pwdpolicy(cnf, args); 369 pwd->pw_expire = pw_exppolicy(cnf, args); 370 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name); 371 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL); 372 373 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 374 fprintf(stderr, "WARNING: new account `%s' has a uid of 0 (superuser access!)\n", pwd->pw_name); 375 } 376 377 /* 378 * Shared add/edit code 379 */ 380 if ((arg = getarg(args, 'c')) != NULL) 381 pwd->pw_gecos = pw_checkname((u_char *)arg->val, 1); 382 383 if ((arg = getarg(args, 'h')) != NULL) { 384 if (strcmp(arg->val, "-") == 0) 385 pwd->pw_passwd = "*"; /* No access */ 386 else { 387 int fd = atoi(arg->val); 388 int b; 389 int istty = isatty(fd); 390 struct termios t; 391 392 if (istty) { 393 if (tcgetattr(fd, &t) == -1) 394 istty = 0; 395 else { 396 struct termios n = t; 397 398 /* Disable echo */ 399 n.c_lflag &= ~(ECHO); 400 tcsetattr(fd, TCSANOW, &n); 401 printf("%sassword for user %s:", (mode == M_UPDATE) ? "New p" : "P", pwd->pw_name); 402 fflush(stdout); 403 } 404 } 405 b = read(fd, line, sizeof(line) - 1); 406 if (istty) { /* Restore state */ 407 tcsetattr(fd, TCSANOW, &t); 408 fputc('\n', stdout); 409 fflush(stdout); 410 } 411 if (b < 0) { 412 perror("-h file descriptor"); 413 return EX_IOERR; 414 } 415 line[b] = '\0'; 416 if ((p = strpbrk(line, " \t\r\n")) != NULL) 417 *p = '\0'; 418 if (!*line) 419 cmderr(EX_DATAERR, "empty password read on file descriptor %d\n", fd); 420 pwd->pw_passwd = pw_pwcrypt(line); 421 } 422 } 423 424 /* 425 * Special case: -N only displays & exits 426 */ 427 if (getarg(args, 'N') != NULL) 428 return print_user(pwd, getarg(args, 'P') != NULL); 429 430 if ((mode == M_ADD && !addpwent(pwd)) || 431 (mode == M_UPDATE && !chgpwent(a_name->val, pwd))) { 432 perror("password update"); 433 return EX_IOERR; 434 } 435 /* 436 * Ok, user is created or changed - now edit group file 437 */ 438 439 if (mode == M_ADD || getarg(args, 'G') != NULL) 440 editgroups(pwd->pw_name, cnf->groups); 441 442 /* pwd may have been invalidated */ 443 if ((pwd = getpwnam(a_name->val)) == NULL) 444 cmderr(EX_NOUSER, "user '%s' disappeared during update\n", a_name->val); 445 446 grp = getgrgid(pwd->pw_gid); 447 pw_log(cnf, mode, W_USER, "%s(%ld):%s(%d):%s:%s:%s", 448 pwd->pw_name, (long) pwd->pw_uid, 449 grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1), 450 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 451 452 /* 453 * If adding, let's touch and chown the user's mail file. This is not 454 * strictly necessary under BSD with a 0755 maildir but it also 455 * doesn't hurt anything to create the empty mailfile 456 */ 457 if (mode == M_ADD) { 458 FILE *fp; 459 460 sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name); 461 close(open(line, O_RDWR | O_CREAT, 0600)); /* Preserve contents & 462 * mtime */ 463 chown(line, pwd->pw_uid, pwd->pw_gid); 464 465 /* 466 * Send mail to the new user as well, if we are asked to 467 */ 468 if (cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) { 469 FILE *pfp = popen(_PATH_SENDMAIL " -t", "w"); 470 471 if (pfp == NULL) 472 perror("sendmail"); 473 else { 474 fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name); 475 while (fgets(line, sizeof(line), fp) != NULL) { 476 /* Do substitutions? */ 477 fputs(line, pfp); 478 } 479 pclose(pfp); 480 pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent", 481 pwd->pw_name, (long) pwd->pw_uid); 482 } 483 fclose(fp); 484 } 485 } 486 /* 487 * Finally, let's create and populate the user's home directory. Note 488 * that this also `works' for editing users if -m is used, but 489 * existing files will *not* be overwritten. 490 */ 491 if (getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) { 492 copymkdir(pwd->pw_dir, cnf->dotdir, 0755, pwd->pw_uid, pwd->pw_gid); 493 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made", 494 pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir); 495 } 496 return EXIT_SUCCESS; 497} 498 499 500static uid_t 501pw_uidpolicy(struct userconf * cnf, struct cargs * args) 502{ 503 struct passwd *pwd; 504 uid_t uid = (uid_t) - 1; 505 struct carg *a_uid = getarg(args, 'u'); 506 507 /* 508 * Check the given uid, if any 509 */ 510 if (a_uid != NULL) { 511 uid = (uid_t) atol(a_uid->val); 512 513 if ((pwd = getpwuid(uid)) != NULL && getarg(args, 'o') == NULL) 514 cmderr(EX_DATAERR, "uid `%ld' has already been allocated\n", (long) pwd->pw_uid); 515 } else { 516 struct bitmap bm; 517 518 /* 519 * We need to allocate the next available uid under one of 520 * two policies a) Grab the first unused uid b) Grab the 521 * highest possible unused uid 522 */ 523 if (cnf->min_uid >= cnf->max_uid) { /* Sanity 524 * claus^H^H^H^Hheck */ 525 cnf->min_uid = 1000; 526 cnf->max_uid = 32000; 527 } 528 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1); 529 530 /* 531 * Now, let's fill the bitmap from the password file 532 */ 533 setpwent(); 534 while ((pwd = getpwent()) != NULL) 535 if (pwd->pw_uid >= (int) cnf->min_uid && pwd->pw_uid <= (int) cnf->max_uid) 536 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid); 537 endpwent(); 538 539 /* 540 * Then apply the policy, with fallback to reuse if necessary 541 */ 542 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid) 543 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid); 544 545 /* 546 * Another sanity check 547 */ 548 if (uid < cnf->min_uid || uid > cnf->max_uid) 549 cmderr(EX_SOFTWARE, "unable to allocate a new uid - range fully used\n"); 550 bm_dealloc(&bm); 551 } 552 return uid; 553} 554 555 556static uid_t 557pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer) 558{ 559 struct group *grp; 560 gid_t gid = (uid_t) - 1; 561 struct carg *a_gid = getarg(args, 'g'); 562 563 /* 564 * If no arg given, see if default can help out 565 */ 566 if (a_gid == NULL && cnf->default_group && *cnf->default_group) 567 a_gid = addarg(args, 'g', cnf->default_group); 568 569 /* 570 * Check the given gid, if any 571 */ 572 setgrent(); 573 if (a_gid != NULL) { 574 if ((grp = getgrnam(a_gid->val)) == NULL) { 575 gid = (gid_t) atol(a_gid->val); 576 if ((gid == 0 && !isdigit(*a_gid->val)) || (grp = getgrgid(gid)) == NULL) 577 cmderr(EX_NOUSER, "group `%s' is not defined\n", a_gid->val); 578 } 579 gid = grp->gr_gid; 580 } else if ((grp = getgrnam(nam)) != NULL && grp->gr_mem[0] == NULL) { 581 gid = grp->gr_gid; /* Already created? Use it anyway... */ 582 } else { 583 struct cargs grpargs; 584 char tmp[32]; 585 586 LIST_INIT(&grpargs); 587 addarg(&grpargs, 'n', nam); 588 589 /* 590 * We need to auto-create a group with the user's name. We 591 * can send all the appropriate output to our sister routine 592 * bit first see if we can create a group with gid==uid so we 593 * can keep the user and group ids in sync. We purposely do 594 * NOT check the gid range if we can force the sync. If the 595 * user's name dups an existing group, then the group add 596 * function will happily handle that case for us and exit. 597 */ 598 if (getgrgid(prefer) == NULL) { 599 sprintf(tmp, "%lu", (unsigned long) prefer); 600 addarg(&grpargs, 'g', tmp); 601 } 602 if (getarg(args, 'N')) 603 { 604 addarg(&grpargs, 'N', NULL); 605 addarg(&grpargs, 'q', NULL); 606 gid = pw_group(cnf, M_NEXT, &grpargs); 607 } 608 else 609 { 610 pw_group(cnf, M_ADD, &grpargs); 611 if ((grp = getgrnam(nam)) != NULL) 612 gid = grp->gr_gid; 613 } 614 a_gid = grpargs.lh_first; 615 while (a_gid != NULL) { 616 struct carg *t = a_gid->list.le_next; 617 LIST_REMOVE(a_gid, list); 618 a_gid = t; 619 } 620 } 621 endgrent(); 622 return gid; 623} 624 625 626static time_t 627pw_pwdpolicy(struct userconf * cnf, struct cargs * args) 628{ 629 time_t result = 0; 630 time_t now = time(NULL); 631 struct carg *arg = getarg(args, 'e'); 632 633 if (arg != NULL) { 634 if ((result = parse_date(now, arg->val)) == now) 635 cmderr(EX_DATAERR, "invalid date/time `%s'\n", arg->val); 636 } else if (cnf->password_days > 0) 637 result = now + ((long) cnf->password_days * 86400L); 638 return result; 639} 640 641 642static time_t 643pw_exppolicy(struct userconf * cnf, struct cargs * args) 644{ 645 time_t result = 0; 646 time_t now = time(NULL); 647 struct carg *arg = getarg(args, 'e'); 648 649 if (arg != NULL) { 650 if ((result = parse_date(now, arg->val)) == now) 651 cmderr(EX_DATAERR, "invalid date/time `%s'\n", arg->val); 652 } else if (cnf->expire_days > 0) 653 result = now + ((long) cnf->expire_days * 86400L); 654 return result; 655} 656 657 658static char * 659pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user) 660{ 661 struct carg *arg = getarg(args, 'd'); 662 663 if (arg) 664 return arg->val; 665 else { 666 static char home[128]; 667 668 if (cnf->home == NULL || *cnf->home == '\0') 669 cmderr(EX_CONFIG, "no base home directory set\n"); 670 sprintf(home, "%s/%s", cnf->home, user); 671 return home; 672 } 673} 674 675static char * 676shell_path(char const * path, char *shells[], char *sh) 677{ 678 if (sh != NULL && (*sh == '/' || *sh == '\0')) 679 return sh; /* specified full path or forced none */ 680 else { 681 char *p; 682 char paths[_UC_MAXLINE]; 683 684 /* 685 * We need to search paths 686 */ 687 strncpy(paths, path, sizeof paths); 688 paths[sizeof paths - 1] = '\0'; 689 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) { 690 int i; 691 static char shellpath[256]; 692 693 if (sh != NULL) { 694 sprintf(shellpath, "%s/%s", p, sh); 695 if (access(shellpath, X_OK) == 0) 696 return shellpath; 697 } else 698 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) { 699 sprintf(shellpath, "%s/%s", p, shells[i]); 700 if (access(shellpath, X_OK) == 0) 701 return shellpath; 702 } 703 } 704 if (sh == NULL) 705 cmderr(EX_OSFILE, "can't find shell `%s' in shell paths\n", sh); 706 cmderr(EX_CONFIG, "no default shell available or defined\n"); 707 return NULL; 708 } 709} 710 711 712static char * 713pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell) 714{ 715 char *sh = newshell; 716 struct carg *arg = getarg(args, 's'); 717 718 if (newshell == NULL && arg != NULL) 719 sh = arg->val; 720 return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default); 721} 722 723static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ."; 724 725char * 726pw_pwcrypt(char *password) 727{ 728 int i; 729 char salt[12]; 730 731 static char buf[256]; 732 733 /* 734 * Calculate a salt value 735 */ 736 srandom((unsigned) (time(NULL) ^ getpid())); 737 for (i = 0; i < 8; i++) 738 salt[i] = chars[random() % 63]; 739 salt[i] = '\0'; 740 741 return strcpy(buf, crypt(password, salt)); 742} 743 744#if defined(__FreeBSD__) 745 746#if defined(USE_MD5RAND) 747u_char * 748pw_getrand(u_char *buf, int len) /* cryptographically secure rng */ 749{ 750 int i; 751 for (i=0;i<len;i+=16) { 752 u_char ubuf[16]; 753 754 MD5_CTX md5_ctx; 755 struct timeval tv, tvo; 756 struct rusage ru; 757 int n=0; 758 int t; 759 760 MD5Init (&md5_ctx); 761 t=getpid(); 762 MD5Update (&md5_ctx, (u_char*)&t, sizeof t); 763 t=getppid(); 764 MD5Update (&md5_ctx, (u_char*)&t, sizeof t); 765 gettimeofday (&tvo, NULL); 766 do { 767 getrusage (RUSAGE_SELF, &ru); 768 MD5Update (&md5_ctx, (u_char*)&ru, sizeof ru); 769 gettimeofday (&tv, NULL); 770 MD5Update (&md5_ctx, (u_char*)&tv, sizeof tv); 771 } while (n++<20 || tv.tv_usec-tvo.tv_usec<100*1000); 772 MD5Final (ubuf, &md5_ctx); 773 memcpy(buf+i, ubuf, MIN(16, len-n)); 774 } 775 return buf; 776} 777 778#else /* Use random device (preferred) */ 779 780static u_char * 781pw_getrand(u_char *buf, int len) 782{ 783 int fd; 784 fd = open("/dev/urandom", O_RDONLY); 785 if (fd==-1) 786 cmderr(EX_OSFILE, "can't open /dev/urandom: %s\n", strerror(errno)); 787 else if (read(fd, buf, len)!=len) 788 cmderr(EX_IOERR, "read error on /dev/urandom\n"); 789 close(fd); 790 return buf; 791} 792 793#endif 794 795#else /* Portable version */ 796 797static u_char * 798pw_getrand(u_char *buf, int len) 799{ 800 int i; 801 802 for (i = 0; i < len; i++) { 803 unsigned val = random(); 804 /* Use all bits in the random value */ 805 buf[i]=(u_char)((val >> 24) ^ (val >> 16) ^ (val >> 8) ^ val); 806 } 807 return buf; 808} 809 810#endif 811 812static char * 813pw_password(struct userconf * cnf, struct cargs * args, char const * user) 814{ 815 int i, l; 816 char pwbuf[32]; 817 u_char rndbuf[sizeof pwbuf]; 818 819 switch (cnf->default_password) { 820 case -1: /* Random password */ 821 srandom((unsigned) (time(NULL) ^ getpid())); 822 l = (random() % 8 + 8); /* 8 - 16 chars */ 823 pw_getrand(rndbuf, l); 824 for (i = 0; i < l; i++) 825 pwbuf[i] = chars[rndbuf[i] % sizeof(chars)]; 826 pwbuf[i] = '\0'; 827 828 /* 829 * We give this information back to the user 830 */ 831 if (getarg(args, 'h') == NULL && getarg(args, 'N') == NULL) { 832 if (isatty(0)) 833 printf("Password is: "); 834 printf("%s\n", pwbuf); 835 fflush(stdout); 836 } 837 break; 838 839 case -2: /* No password at all! */ 840 return ""; 841 842 case 0: /* No login - default */ 843 default: 844 return "*"; 845 846 case 1: /* user's name */ 847 strncpy(pwbuf, user, sizeof pwbuf); 848 pwbuf[sizeof pwbuf - 1] = '\0'; 849 break; 850 } 851 return pw_pwcrypt(pwbuf); 852} 853 854 855static int 856print_user(struct passwd * pwd, int pretty) 857{ 858 if (!pretty) { 859 char buf[_UC_MAXLINE]; 860 861 fmtpwent(buf, pwd); 862 fputs(buf, stdout); 863 } else { 864 int j; 865 char *p; 866 struct group *grp = getgrgid(pwd->pw_gid); 867 char uname[60] = "User &", office[60] = "[None]", 868 wphone[60] = "[None]", hphone[60] = "[None]"; 869 char acexpire[32] = "[None]", pwexpire[32] = "[None]"; 870 struct tm * tptr; 871 872 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) { 873 strncpy(uname, p, sizeof uname); 874 uname[sizeof uname - 1] = '\0'; 875 if ((p = strtok(NULL, ",")) != NULL) { 876 strncpy(office, p, sizeof office); 877 office[sizeof office - 1] = '\0'; 878 if ((p = strtok(NULL, ",")) != NULL) { 879 strncpy(wphone, p, sizeof wphone); 880 wphone[sizeof wphone - 1] = '\0'; 881 if ((p = strtok(NULL, "")) != NULL) { 882 strncpy(hphone, p, sizeof hphone); 883 hphone[sizeof hphone - 1] = '\0'; 884 } 885 } 886 } 887 } 888 /* 889 * Handle '&' in gecos field 890 */ 891 if ((p = strchr(uname, '&')) != NULL) { 892 int l = strlen(pwd->pw_name); 893 int m = strlen(p); 894 895 memmove(p + l, p + 1, m); 896 memmove(p, pwd->pw_name, l); 897 *p = (char) toupper(*p); 898 } 899 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL) 900 strftime(acexpire, sizeof acexpire, "%c", tptr); 901 if (pwd->pw_change > (time_t)9 && (tptr = localtime(&pwd->pw_change)) != NULL) 902 strftime(pwexpire, sizeof pwexpire, "%c", tptr); 903 printf("Login Name : %-10s #%-22ld Group : %-10s #%ld\n" 904 " Full Name : %s\n" 905 " Home : %-32.32s Class : %s\n" 906 " Shell : %-32.32s Office : %s\n" 907 "Work Phone : %-32.32s Home Phone : %s\n" 908 "Acc Expire : %-32.32s Pwd Expire : %s\n", 909 pwd->pw_name, (long) pwd->pw_uid, 910 grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid, 911 uname, pwd->pw_dir, pwd->pw_class, 912 pwd->pw_shell, office, wphone, hphone, 913 acexpire, pwexpire); 914 setgrent(); 915 j = 0; 916 while ((grp=getgrent()) != NULL) 917 { 918 int i = 0; 919 while (i < _UC_MAXGROUPS && grp->gr_mem[i] != NULL) 920 { 921 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) 922 { 923 printf(j++ == 0 ? " Groups : %s" : ",%s", grp->gr_name); 924 break; 925 } 926 ++i; 927 } 928 } 929 endgrent(); 930 printf("%s\n", j ? "\n" : ""); 931 } 932 return EXIT_SUCCESS; 933} 934 935char * 936pw_checkname(u_char *name, int gecos) 937{ 938 int l = 0; 939 char const *notch = gecos ? ":" : " ,\t:+-&#%$^()!@~*?<>=|\\/\""; 940 941 while (name[l]) { 942 if (strchr(notch, name[l]) != NULL || name[l] < ' ' || 943 name[l] == 127 || (!gecos && name[l] & 0x80)) /* 8-bit */ 944 cmderr(EX_DATAERR, (name[l]<' ' || name[l] > 126) 945 ? "invalid character `%c' in field\n" 946 : "invalid character 0x$02x in field\n", 947 name[l]); 948 ++l; 949 } 950 if (!gecos && l > MAXLOGNAME) 951 cmderr(EX_DATAERR, "name too long `%s'\n", name); 952 return (char *)name; 953} 954 955 956static void 957rmat(uid_t uid) 958{ 959 DIR *d = opendir("/var/at/jobs"); 960 961 if (d != NULL) { 962 struct dirent *e; 963 964 while ((e = readdir(d)) != NULL) { 965 struct stat st; 966 967 if (strncmp(e->d_name, ".lock", 5) != 0 && 968 stat(e->d_name, &st) == 0 && 969 !S_ISDIR(st.st_mode) && 970 st.st_uid == uid) { 971 char tmp[MAXPATHLEN]; 972 973 sprintf(tmp, "/usr/bin/atrm %s", e->d_name); 974 system(tmp); 975 } 976 } 977 closedir(d); 978 } 979} 980