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 29 static const char rcsid[] = 30 "$FreeBSD$"; 31 #endif /* not lint */ 32 33 #include <ctype.h> 34 #include <err.h> 35 #include <fcntl.h> 36 #include <inttypes.h> 37 #include <sys/param.h> 38 #include <dirent.h> 39 #include <paths.h> 40 #include <termios.h> 41 #include <sys/types.h> 42 #include <sys/time.h> 43 #include <sys/resource.h> 44 #include <login_cap.h> 45 #include <pwd.h> 46 #include <grp.h> 47 #include <libutil.h> 48 #include "pw.h" 49 #include "bitmap.h" 50 51 #define LOGNAMESIZE (MAXLOGNAME-1) 52 53 static char locked_str[] = "*LOCKED*"; 54 55 static int pw_userdel(char *name, long id); 56 static int print_user(struct passwd * pwd); 57 static uid_t pw_uidpolicy(struct userconf * cnf, long id); 58 static uid_t pw_gidpolicy(struct cargs * args, char *nam, gid_t prefer); 59 static time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args); 60 static time_t pw_exppolicy(struct userconf * cnf, struct cargs * args); 61 static char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user); 62 static char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell); 63 static char *pw_password(struct userconf * cnf, char const * user); 64 static char *shell_path(char const * path, char *shells[], char *sh); 65 static void rmat(uid_t uid); 66 static void rmopie(char const * name); 67 68 static void 69 create_and_populate_homedir(struct passwd *pwd) 70 { 71 struct userconf *cnf = conf.userconf; 72 const char *skeldir; 73 int skelfd = -1; 74 75 skeldir = cnf->dotdir; 76 77 if (skeldir != NULL && *skeldir != '\0') { 78 if (*skeldir == '/') 79 skeldir++; 80 skelfd = openat(conf.rootfd, skeldir, O_DIRECTORY|O_CLOEXEC); 81 } 82 83 copymkdir(conf.rootfd, pwd->pw_dir, skelfd, cnf->homemode, pwd->pw_uid, 84 pwd->pw_gid, 0); 85 pw_log(cnf, M_ADD, W_USER, "%s(%ju) home %s made", pwd->pw_name, 86 (uintmax_t)pwd->pw_uid, pwd->pw_dir); 87 } 88 89 static int 90 set_passwd(struct passwd *pwd, bool update) 91 { 92 int b, istty; 93 struct termios t, n; 94 login_cap_t *lc; 95 char line[_PASSWORD_LEN+1]; 96 char *p; 97 98 if (conf.fd == '-') { 99 if (!pwd->pw_passwd || *pwd->pw_passwd != '*') { 100 pwd->pw_passwd = "*"; /* No access */ 101 return (1); 102 } 103 return (0); 104 } 105 106 if ((istty = isatty(conf.fd))) { 107 if (tcgetattr(conf.fd, &t) == -1) 108 istty = 0; 109 else { 110 n = t; 111 n.c_lflag &= ~(ECHO); 112 tcsetattr(conf.fd, TCSANOW, &n); 113 printf("%s%spassword for user %s:", 114 update ? "new " : "", 115 conf.precrypted ? "encrypted " : "", 116 pwd->pw_name); 117 fflush(stdout); 118 } 119 } 120 b = read(conf.fd, line, sizeof(line) - 1); 121 if (istty) { /* Restore state */ 122 tcsetattr(conf.fd, TCSANOW, &t); 123 fputc('\n', stdout); 124 fflush(stdout); 125 } 126 127 if (b < 0) 128 err(EX_IOERR, "-%c file descriptor", 129 conf.precrypted ? 'H' : 'h'); 130 line[b] = '\0'; 131 if ((p = strpbrk(line, "\r\n")) != NULL) 132 *p = '\0'; 133 if (!*line) 134 errx(EX_DATAERR, "empty password read on file descriptor %d", 135 conf.fd); 136 if (conf.precrypted) { 137 if (strchr(line, ':') != NULL) 138 errx(EX_DATAERR, "bad encrypted password"); 139 pwd->pw_passwd = line; 140 } else { 141 lc = login_getpwclass(pwd); 142 if (lc == NULL || 143 login_setcryptfmt(lc, "sha512", NULL) == NULL) 144 warn("setting crypt(3) format"); 145 login_close(lc); 146 pwd->pw_passwd = pw_pwcrypt(line); 147 } 148 return (1); 149 } 150 151 int 152 pw_usernext(struct userconf *cnf, bool quiet) 153 { 154 uid_t next = pw_uidpolicy(cnf, -1); 155 156 if (quiet) 157 return (next); 158 159 printf("%ju:", (uintmax_t)next); 160 pw_groupnext(cnf, quiet); 161 162 return (EXIT_SUCCESS); 163 } 164 165 static int 166 pw_usershow(char *name, long id, struct passwd *fakeuser) 167 { 168 struct passwd *pwd = NULL; 169 170 if (id < 0 && name == NULL && !conf.all) 171 errx(EX_DATAERR, "username or id or '-a' required"); 172 173 if (conf.all) { 174 SETPWENT(); 175 while ((pwd = GETPWENT()) != NULL) 176 print_user(pwd); 177 ENDPWENT(); 178 return (EXIT_SUCCESS); 179 } 180 181 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id); 182 if (pwd == NULL) { 183 if (conf.force) { 184 pwd = fakeuser; 185 } else { 186 if (name == NULL) 187 errx(EX_NOUSER, "no such uid `%ld'", id); 188 errx(EX_NOUSER, "no such user `%s'", name); 189 } 190 } 191 192 return (print_user(pwd)); 193 } 194 195 static void 196 perform_chgpwent(const char *name, struct passwd *pwd) 197 { 198 int rc; 199 200 rc = chgpwent(name, pwd); 201 if (rc == -1) 202 errx(EX_IOERR, "user '%s' does not exist (NIS?)", pwd->pw_name); 203 else if (rc != 0) 204 err(EX_IOERR, "passwd file update"); 205 206 if (conf.userconf->nispasswd && *conf.userconf->nispasswd == '/') { 207 rc = chgnispwent(conf.userconf->nispasswd, name, pwd); 208 if (rc == -1) 209 warn("User '%s' not found in NIS passwd", pwd->pw_name); 210 else if (rc != 0) 211 warn("NIS passwd update"); 212 /* NOTE: NIS-only update errors are not fatal */ 213 } 214 } 215 216 /* 217 * The M_LOCK and M_UNLOCK functions simply add or remove 218 * a "*LOCKED*" prefix from in front of the password to 219 * prevent it decoding correctly, and therefore prevents 220 * access. Of course, this only prevents access via 221 * password authentication (not ssh, kerberos or any 222 * other method that does not use the UNIX password) but 223 * that is a known limitation. 224 */ 225 static int 226 pw_userlock(char *name, long id, int mode) 227 { 228 struct passwd *pwd = NULL; 229 char *passtmp = NULL; 230 bool locked = false; 231 232 if (id < 0 && name == NULL) 233 errx(EX_DATAERR, "username or id required"); 234 235 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id); 236 if (pwd == NULL) { 237 if (name == NULL) 238 errx(EX_NOUSER, "no such uid `%ld'", id); 239 errx(EX_NOUSER, "no such user `%s'", name); 240 } 241 242 if (name == NULL) 243 name = pwd->pw_name; 244 245 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str) -1) == 0) 246 locked = true; 247 if (mode == M_LOCK && locked) 248 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name); 249 if (mode == M_UNLOCK && !locked) 250 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name); 251 252 if (mode == M_LOCK) { 253 asprintf(&passtmp, "%s%s", locked_str, pwd->pw_passwd); 254 if (passtmp == NULL) /* disaster */ 255 errx(EX_UNAVAILABLE, "out of memory"); 256 pwd->pw_passwd = passtmp; 257 } else { 258 pwd->pw_passwd += sizeof(locked_str)-1; 259 } 260 261 perform_chgpwent(name, pwd); 262 free(passtmp); 263 264 return (EXIT_SUCCESS); 265 } 266 267 /*- 268 * -C config configuration file 269 * -q quiet operation 270 * -n name login name 271 * -u uid user id 272 * -c comment user name/comment 273 * -d directory home directory 274 * -e date account expiry date 275 * -p date password expiry date 276 * -g grp primary group 277 * -G grp1,grp2 additional groups 278 * -m [ -k dir ] create and set up home 279 * -s shell name of login shell 280 * -o duplicate uid ok 281 * -L class user class 282 * -l name new login name 283 * -h fd password filehandle 284 * -H fd encrypted password filehandle 285 * -F force print or add 286 * Setting defaults: 287 * -D set user defaults 288 * -b dir default home root dir 289 * -e period default expiry period 290 * -p period default password change period 291 * -g group default group 292 * -G grp1,grp2.. default additional groups 293 * -L class default login class 294 * -k dir default home skeleton 295 * -s shell default shell 296 * -w method default password method 297 */ 298 299 int 300 pw_user(int mode, char *name, long id, struct cargs * args) 301 { 302 int rc, edited = 0; 303 char *p = NULL; 304 struct carg *arg; 305 struct passwd *pwd = NULL; 306 struct group *grp; 307 struct stat st; 308 struct userconf *cnf; 309 char line[_PASSWORD_LEN+1]; 310 char path[MAXPATHLEN]; 311 FILE *fp; 312 char *dmode_c; 313 void *set = NULL; 314 int valid_type = _PWF_FILES; 315 316 static struct passwd fakeuser = 317 { 318 "nouser", 319 "*", 320 -1, 321 -1, 322 0, 323 "", 324 "User &", 325 "/nonexistent", 326 "/bin/sh", 327 0 328 #if defined(__FreeBSD__) 329 ,0 330 #endif 331 }; 332 333 cnf = conf.userconf; 334 335 if (mode == M_NEXT) 336 return (pw_usernext(cnf, conf.quiet)); 337 338 if (mode == M_PRINT) 339 return (pw_usershow(name, id, &fakeuser)); 340 341 if (mode == M_DELETE) 342 return (pw_userdel(name, id)); 343 344 if (mode == M_LOCK || mode == M_UNLOCK) 345 return (pw_userlock(name, id, mode)); 346 347 /* 348 * We can do all of the common legwork here 349 */ 350 351 if ((arg = getarg(args, 'b')) != NULL) { 352 cnf->home = arg->val; 353 } 354 355 if ((arg = getarg(args, 'M')) != NULL) { 356 dmode_c = arg->val; 357 if ((set = setmode(dmode_c)) == NULL) 358 errx(EX_DATAERR, "invalid directory creation mode '%s'", 359 dmode_c); 360 cnf->homemode = getmode(set, _DEF_DIRMODE); 361 free(set); 362 } 363 364 /* 365 * If we'll need to use it or we're updating it, 366 * then create the base home directory if necessary 367 */ 368 if (arg != NULL || getarg(args, 'm') != NULL) { 369 int l = strlen(cnf->home); 370 371 if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */ 372 cnf->home[--l] = '\0'; 373 374 if (l < 2 || *cnf->home != '/') /* Check for absolute path name */ 375 errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home); 376 377 if (stat(cnf->home, &st) == -1) { 378 char dbuf[MAXPATHLEN]; 379 380 /* 381 * This is a kludge especially for Joerg :) 382 * If the home directory would be created in the root partition, then 383 * we really create it under /usr which is likely to have more space. 384 * But we create a symlink from cnf->home -> "/usr" -> cnf->home 385 */ 386 if (strchr(cnf->home+1, '/') == NULL) { 387 snprintf(dbuf, MAXPATHLEN, "/usr%s", cnf->home); 388 if (mkdir(dbuf, _DEF_DIRMODE) != -1 || errno == EEXIST) { 389 chown(dbuf, 0, 0); 390 /* 391 * Skip first "/" and create symlink: 392 * /home -> usr/home 393 */ 394 symlink(dbuf+1, cnf->home); 395 } 396 /* If this falls, fall back to old method */ 397 } 398 strlcpy(dbuf, cnf->home, sizeof(dbuf)); 399 p = dbuf; 400 if (stat(dbuf, &st) == -1) { 401 while ((p = strchr(p + 1, '/')) != NULL) { 402 *p = '\0'; 403 if (stat(dbuf, &st) == -1) { 404 if (mkdir(dbuf, _DEF_DIRMODE) == -1) 405 err(EX_OSFILE, "mkdir '%s'", dbuf); 406 chown(dbuf, 0, 0); 407 } else if (!S_ISDIR(st.st_mode)) 408 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf); 409 *p = '/'; 410 } 411 } 412 if (stat(dbuf, &st) == -1) { 413 if (mkdir(dbuf, _DEF_DIRMODE) == -1) 414 err(EX_OSFILE, "mkdir '%s'", dbuf); 415 chown(dbuf, 0, 0); 416 } 417 } else if (!S_ISDIR(st.st_mode)) 418 errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home); 419 } 420 421 if ((arg = getarg(args, 'e')) != NULL) 422 cnf->expire_days = atoi(arg->val); 423 424 if ((arg = getarg(args, 'y')) != NULL) 425 cnf->nispasswd = arg->val; 426 427 if ((arg = getarg(args, 'p')) != NULL && arg->val) 428 cnf->password_days = atoi(arg->val); 429 430 if ((arg = getarg(args, 'g')) != NULL) { 431 if (!*(p = arg->val)) /* Handle empty group list specially */ 432 cnf->default_group = ""; 433 else { 434 if ((grp = GETGRNAM(p)) == NULL) { 435 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 436 errx(EX_NOUSER, "group `%s' does not exist", p); 437 } 438 cnf->default_group = newstr(grp->gr_name); 439 } 440 } 441 if ((arg = getarg(args, 'L')) != NULL) 442 cnf->default_class = pw_checkname(arg->val, 0); 443 444 if ((arg = getarg(args, 'G')) != NULL && arg->val) { 445 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) { 446 if ((grp = GETGRNAM(p)) == NULL) { 447 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 448 errx(EX_NOUSER, "group `%s' does not exist", p); 449 } 450 sl_add(cnf->groups, newstr(grp->gr_name)); 451 } 452 } 453 454 if ((arg = getarg(args, 'k')) != NULL) { 455 char *tmp = cnf->dotdir = arg->val; 456 if (*tmp == '/') 457 tmp++; 458 if ((fstatat(conf.rootfd, tmp, &st, 0) == -1) || 459 !S_ISDIR(st.st_mode)) 460 errx(EX_OSFILE, "skeleton `%s' is not a directory or " 461 "does not exist", cnf->dotdir); 462 } 463 464 if ((arg = getarg(args, 's')) != NULL) 465 cnf->shell_default = arg->val; 466 467 if ((arg = getarg(args, 'w')) != NULL) 468 cnf->default_password = boolean_val(arg->val, cnf->default_password); 469 if (mode == M_ADD && getarg(args, 'D')) { 470 if (name != NULL) 471 errx(EX_DATAERR, "can't combine `-D' with `-n name'"); 472 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 473 if ((cnf->min_uid = (uid_t) atoi(p)) == 0) 474 cnf->min_uid = 1000; 475 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid) 476 cnf->max_uid = 32000; 477 } 478 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 479 if ((cnf->min_gid = (gid_t) atoi(p)) == 0) 480 cnf->min_gid = 1000; 481 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid) 482 cnf->max_gid = 32000; 483 } 484 485 if (write_userconfig(conf.config)) 486 return (EXIT_SUCCESS); 487 err(EX_IOERR, "config udpate"); 488 } 489 490 if (name != NULL) 491 pwd = GETPWNAM(pw_checkname(name, 0)); 492 493 if (id < 0 && name == NULL) 494 errx(EX_DATAERR, "user name or id required"); 495 496 /* 497 * Update require that the user exists 498 */ 499 if (mode == M_UPDATE) { 500 501 if (name == NULL && pwd == NULL) /* Try harder */ 502 pwd = GETPWUID(id); 503 504 if (pwd == NULL) { 505 if (name == NULL) 506 errx(EX_NOUSER, "no such uid `%ld'", id); 507 errx(EX_NOUSER, "no such user `%s'", name); 508 } 509 510 if (conf.userconf->nispasswd && *conf.userconf->nispasswd == '/') 511 valid_type = _PWF_NIS; 512 513 if (PWF._altdir == PWF_REGULAR && 514 ((pwd->pw_fields & _PWF_SOURCE) != valid_type)) 515 errx(EX_NOUSER, "no such %s user `%s'", 516 valid_type == _PWF_FILES ? "local" : "NIS" , name); 517 518 if (name == NULL) 519 name = pwd->pw_name; 520 521 /* 522 * The rest is edit code 523 */ 524 if (conf.newname != NULL) { 525 if (strcmp(pwd->pw_name, "root") == 0) 526 errx(EX_DATAERR, "can't rename `root' account"); 527 pwd->pw_name = pw_checkname(conf.newname, 0); 528 edited = 1; 529 } 530 531 if (id > 0 && isdigit((unsigned char)*arg->val)) { 532 pwd->pw_uid = (uid_t)id; 533 edited = 1; 534 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0) 535 errx(EX_DATAERR, "can't change uid of `root' account"); 536 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 537 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name); 538 } 539 540 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) { /* Already checked this */ 541 gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid; 542 if (newgid != pwd->pw_gid) { 543 edited = 1; 544 pwd->pw_gid = newgid; 545 } 546 } 547 548 if ((arg = getarg(args, 'p')) != NULL) { 549 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 550 if (pwd->pw_change != 0) { 551 pwd->pw_change = 0; 552 edited = 1; 553 } 554 } 555 else { 556 time_t now = time(NULL); 557 time_t expire = parse_date(now, arg->val); 558 559 if (pwd->pw_change != expire) { 560 pwd->pw_change = expire; 561 edited = 1; 562 } 563 } 564 } 565 566 if ((arg = getarg(args, 'e')) != NULL) { 567 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 568 if (pwd->pw_expire != 0) { 569 pwd->pw_expire = 0; 570 edited = 1; 571 } 572 } 573 else { 574 time_t now = time(NULL); 575 time_t expire = parse_date(now, arg->val); 576 577 if (pwd->pw_expire != expire) { 578 pwd->pw_expire = expire; 579 edited = 1; 580 } 581 } 582 } 583 584 if ((arg = getarg(args, 's')) != NULL) { 585 char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val); 586 if (shell == NULL) 587 shell = ""; 588 if (strcmp(shell, pwd->pw_shell) != 0) { 589 pwd->pw_shell = shell; 590 edited = 1; 591 } 592 } 593 594 if (getarg(args, 'L')) { 595 if (cnf->default_class == NULL) 596 cnf->default_class = ""; 597 if (strcmp(pwd->pw_class, cnf->default_class) != 0) { 598 pwd->pw_class = cnf->default_class; 599 edited = 1; 600 } 601 } 602 603 if ((arg = getarg(args, 'd')) != NULL) { 604 if (strcmp(pwd->pw_dir, arg->val)) 605 edited = 1; 606 if (stat(pwd->pw_dir = arg->val, &st) == -1) { 607 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0) 608 warnx("WARNING: home `%s' does not exist", pwd->pw_dir); 609 } else if (!S_ISDIR(st.st_mode)) 610 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir); 611 } 612 613 if ((arg = getarg(args, 'w')) != NULL && conf.fd == -1) { 614 login_cap_t *lc; 615 616 lc = login_getpwclass(pwd); 617 if (lc == NULL || 618 login_setcryptfmt(lc, "sha512", NULL) == NULL) 619 warn("setting crypt(3) format"); 620 login_close(lc); 621 pwd->pw_passwd = pw_password(cnf, pwd->pw_name); 622 edited = 1; 623 } 624 625 } else { 626 login_cap_t *lc; 627 628 /* 629 * Add code 630 */ 631 632 if (name == NULL) /* Required */ 633 errx(EX_DATAERR, "login name required"); 634 else if ((pwd = GETPWNAM(name)) != NULL) /* Exists */ 635 errx(EX_DATAERR, "login name `%s' already exists", name); 636 637 /* 638 * Now, set up defaults for a new user 639 */ 640 pwd = &fakeuser; 641 pwd->pw_name = name; 642 pwd->pw_class = cnf->default_class ? cnf->default_class : ""; 643 pwd->pw_uid = pw_uidpolicy(cnf, id); 644 pwd->pw_gid = pw_gidpolicy(args, pwd->pw_name, (gid_t) pwd->pw_uid); 645 pwd->pw_change = pw_pwdpolicy(cnf, args); 646 pwd->pw_expire = pw_exppolicy(cnf, args); 647 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name); 648 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL); 649 lc = login_getpwclass(pwd); 650 if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL) 651 warn("setting crypt(3) format"); 652 login_close(lc); 653 pwd->pw_passwd = pw_password(cnf, pwd->pw_name); 654 edited = 1; 655 656 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 657 warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name); 658 } 659 660 /* 661 * Shared add/edit code 662 */ 663 if (conf.gecos != NULL) { 664 if (strcmp(pwd->pw_gecos, conf.gecos) != 0) { 665 pwd->pw_gecos = conf.gecos; 666 edited = 1; 667 } 668 } 669 670 if (conf.fd != -1) 671 edited = set_passwd(pwd, mode == M_UPDATE); 672 673 /* 674 * Special case: -N only displays & exits 675 */ 676 if (conf.dryrun) 677 return print_user(pwd); 678 679 if (mode == M_ADD) { 680 edited = 1; /* Always */ 681 rc = addpwent(pwd); 682 if (rc == -1) 683 errx(EX_IOERR, "user '%s' already exists", 684 pwd->pw_name); 685 else if (rc != 0) 686 err(EX_IOERR, "passwd file update"); 687 if (cnf->nispasswd && *cnf->nispasswd=='/') { 688 rc = addnispwent(cnf->nispasswd, pwd); 689 if (rc == -1) 690 warnx("User '%s' already exists in NIS passwd", pwd->pw_name); 691 else if (rc != 0) 692 warn("NIS passwd update"); 693 /* NOTE: we treat NIS-only update errors as non-fatal */ 694 } 695 } else if (mode == M_UPDATE && edited) /* Only updated this if required */ 696 perform_chgpwent(name, pwd); 697 698 /* 699 * Ok, user is created or changed - now edit group file 700 */ 701 702 if (mode == M_ADD || getarg(args, 'G') != NULL) { 703 int j; 704 size_t i; 705 /* First remove the user from all group */ 706 SETGRENT(); 707 while ((grp = GETGRENT()) != NULL) { 708 char group[MAXLOGNAME]; 709 if (grp->gr_mem == NULL) 710 continue; 711 for (i = 0; grp->gr_mem[i] != NULL; i++) { 712 if (strcmp(grp->gr_mem[i] , pwd->pw_name) != 0) 713 continue; 714 for (j = i; grp->gr_mem[j] != NULL ; j++) 715 grp->gr_mem[j] = grp->gr_mem[j+1]; 716 strlcpy(group, grp->gr_name, MAXLOGNAME); 717 chggrent(group, grp); 718 } 719 } 720 ENDGRENT(); 721 722 /* now add to group where needed */ 723 for (i = 0; i < cnf->groups->sl_cur; i++) { 724 grp = GETGRNAM(cnf->groups->sl_str[i]); 725 grp = gr_add(grp, pwd->pw_name); 726 /* 727 * grp can only be NULL in 2 cases: 728 * - the new member is already a member 729 * - a problem with memory occurs 730 * in both cases we want to skip now. 731 */ 732 if (grp == NULL) 733 continue; 734 chggrent(grp->gr_name, grp); 735 free(grp); 736 } 737 } 738 739 740 /* go get a current version of pwd */ 741 pwd = GETPWNAM(name); 742 if (pwd == NULL) { 743 /* This will fail when we rename, so special case that */ 744 if (mode == M_UPDATE && conf.newname != NULL) { 745 name = conf.newname; /* update new name */ 746 pwd = GETPWNAM(name); /* refetch renamed rec */ 747 } 748 } 749 if (pwd == NULL) /* can't go on without this */ 750 errx(EX_NOUSER, "user '%s' disappeared during update", name); 751 752 grp = GETGRGID(pwd->pw_gid); 753 pw_log(cnf, mode, W_USER, "%s(%ju):%s(%ju):%s:%s:%s", 754 pwd->pw_name, (uintmax_t)pwd->pw_uid, 755 grp ? grp->gr_name : "unknown", (uintmax_t)(grp ? grp->gr_gid : (uid_t)-1), 756 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 757 758 /* 759 * If adding, let's touch and chown the user's mail file. This is not 760 * strictly necessary under BSD with a 0755 maildir but it also 761 * doesn't hurt anything to create the empty mailfile 762 */ 763 if (mode == M_ADD) { 764 if (PWALTDIR() != PWF_ALT) { 765 snprintf(path, sizeof(path), "%s/%s", _PATH_MAILDIR, 766 pwd->pw_name); 767 close(openat(conf.rootfd, path +1, O_RDWR | O_CREAT, 768 0600)); /* Preserve contents & mtime */ 769 fchownat(conf.rootfd, path + 1, pwd->pw_uid, 770 pwd->pw_gid, AT_SYMLINK_NOFOLLOW); 771 } 772 } 773 774 /* 775 * Let's create and populate the user's home directory. Note 776 * that this also `works' for editing users if -m is used, but 777 * existing files will *not* be overwritten. 778 */ 779 if (PWALTDIR() != PWF_ALT && getarg(args, 'm') != NULL && pwd->pw_dir && 780 *pwd->pw_dir == '/' && pwd->pw_dir[1]) 781 create_and_populate_homedir(pwd); 782 783 /* 784 * Finally, send mail to the new user as well, if we are asked to 785 */ 786 if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) { 787 FILE *pfp = popen(_PATH_SENDMAIL " -t", "w"); 788 789 if (pfp == NULL) 790 warn("sendmail"); 791 else { 792 fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name); 793 while (fgets(line, sizeof(line), fp) != NULL) { 794 /* Do substitutions? */ 795 fputs(line, pfp); 796 } 797 pclose(pfp); 798 pw_log(cnf, mode, W_USER, "%s(%ju) new user mail sent", 799 pwd->pw_name, (uintmax_t)pwd->pw_uid); 800 } 801 fclose(fp); 802 } 803 804 return EXIT_SUCCESS; 805 } 806 807 808 static uid_t 809 pw_uidpolicy(struct userconf * cnf, long id) 810 { 811 struct passwd *pwd; 812 uid_t uid = (uid_t) - 1; 813 814 /* 815 * Check the given uid, if any 816 */ 817 if (id >= 0) { 818 uid = (uid_t) id; 819 820 if ((pwd = GETPWUID(uid)) != NULL && conf.checkduplicate) 821 errx(EX_DATAERR, "uid `%ju' has already been allocated", 822 (uintmax_t)pwd->pw_uid); 823 } else { 824 struct bitmap bm; 825 826 /* 827 * We need to allocate the next available uid under one of 828 * two policies a) Grab the first unused uid b) Grab the 829 * highest possible unused uid 830 */ 831 if (cnf->min_uid >= cnf->max_uid) { /* Sanity 832 * claus^H^H^H^Hheck */ 833 cnf->min_uid = 1000; 834 cnf->max_uid = 32000; 835 } 836 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1); 837 838 /* 839 * Now, let's fill the bitmap from the password file 840 */ 841 SETPWENT(); 842 while ((pwd = GETPWENT()) != NULL) 843 if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid) 844 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid); 845 ENDPWENT(); 846 847 /* 848 * Then apply the policy, with fallback to reuse if necessary 849 */ 850 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid) 851 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid); 852 853 /* 854 * Another sanity check 855 */ 856 if (uid < cnf->min_uid || uid > cnf->max_uid) 857 errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used"); 858 bm_dealloc(&bm); 859 } 860 return uid; 861 } 862 863 864 static uid_t 865 pw_gidpolicy(struct cargs * args, char *nam, gid_t prefer) 866 { 867 struct group *grp; 868 gid_t gid = (uid_t) - 1; 869 struct carg *a_gid = getarg(args, 'g'); 870 struct userconf *cnf = conf.userconf; 871 872 /* 873 * If no arg given, see if default can help out 874 */ 875 if (a_gid == NULL && cnf->default_group && *cnf->default_group) 876 a_gid = addarg(args, 'g', cnf->default_group); 877 878 /* 879 * Check the given gid, if any 880 */ 881 SETGRENT(); 882 if (a_gid != NULL) { 883 if ((grp = GETGRNAM(a_gid->val)) == NULL) { 884 gid = (gid_t) atol(a_gid->val); 885 if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL) 886 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val); 887 } 888 gid = grp->gr_gid; 889 } else if ((grp = GETGRNAM(nam)) != NULL && 890 (grp->gr_mem == NULL || grp->gr_mem[0] == NULL)) { 891 gid = grp->gr_gid; /* Already created? Use it anyway... */ 892 } else { 893 gid_t grid = -1; 894 895 /* 896 * We need to auto-create a group with the user's name. We 897 * can send all the appropriate output to our sister routine 898 * bit first see if we can create a group with gid==uid so we 899 * can keep the user and group ids in sync. We purposely do 900 * NOT check the gid range if we can force the sync. If the 901 * user's name dups an existing group, then the group add 902 * function will happily handle that case for us and exit. 903 */ 904 if (GETGRGID(prefer) == NULL) 905 grid = prefer; 906 if (conf.dryrun) { 907 gid = pw_groupnext(cnf, true); 908 } else { 909 pw_group(M_ADD, nam, grid, NULL); 910 if ((grp = GETGRNAM(nam)) != NULL) 911 gid = grp->gr_gid; 912 } 913 } 914 ENDGRENT(); 915 return gid; 916 } 917 918 919 static time_t 920 pw_pwdpolicy(struct userconf * cnf, struct cargs * args) 921 { 922 time_t result = 0; 923 time_t now = time(NULL); 924 struct carg *arg = getarg(args, 'p'); 925 926 if (arg != NULL) { 927 if ((result = parse_date(now, arg->val)) == now) 928 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 929 } else if (cnf->password_days > 0) 930 result = now + ((long) cnf->password_days * 86400L); 931 return result; 932 } 933 934 935 static time_t 936 pw_exppolicy(struct userconf * cnf, struct cargs * args) 937 { 938 time_t result = 0; 939 time_t now = time(NULL); 940 struct carg *arg = getarg(args, 'e'); 941 942 if (arg != NULL) { 943 if ((result = parse_date(now, arg->val)) == now) 944 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 945 } else if (cnf->expire_days > 0) 946 result = now + ((long) cnf->expire_days * 86400L); 947 return result; 948 } 949 950 951 static char * 952 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user) 953 { 954 struct carg *arg = getarg(args, 'd'); 955 static char home[128]; 956 957 if (arg) 958 return (arg->val); 959 960 if (cnf->home == NULL || *cnf->home == '\0') 961 errx(EX_CONFIG, "no base home directory set"); 962 snprintf(home, sizeof(home), "%s/%s", cnf->home, user); 963 964 return (home); 965 } 966 967 static char * 968 shell_path(char const * path, char *shells[], char *sh) 969 { 970 if (sh != NULL && (*sh == '/' || *sh == '\0')) 971 return sh; /* specified full path or forced none */ 972 else { 973 char *p; 974 char paths[_UC_MAXLINE]; 975 976 /* 977 * We need to search paths 978 */ 979 strlcpy(paths, path, sizeof(paths)); 980 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) { 981 int i; 982 static char shellpath[256]; 983 984 if (sh != NULL) { 985 snprintf(shellpath, sizeof(shellpath), "%s/%s", p, sh); 986 if (access(shellpath, X_OK) == 0) 987 return shellpath; 988 } else 989 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) { 990 snprintf(shellpath, sizeof(shellpath), "%s/%s", p, shells[i]); 991 if (access(shellpath, X_OK) == 0) 992 return shellpath; 993 } 994 } 995 if (sh == NULL) 996 errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh); 997 errx(EX_CONFIG, "no default shell available or defined"); 998 return NULL; 999 } 1000 } 1001 1002 1003 static char * 1004 pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell) 1005 { 1006 char *sh = newshell; 1007 struct carg *arg = getarg(args, 's'); 1008 1009 if (newshell == NULL && arg != NULL) 1010 sh = arg->val; 1011 return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default); 1012 } 1013 1014 #define SALTSIZE 32 1015 1016 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./"; 1017 1018 char * 1019 pw_pwcrypt(char *password) 1020 { 1021 int i; 1022 char salt[SALTSIZE + 1]; 1023 char *cryptpw; 1024 1025 static char buf[256]; 1026 1027 /* 1028 * Calculate a salt value 1029 */ 1030 for (i = 0; i < SALTSIZE; i++) 1031 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)]; 1032 salt[SALTSIZE] = '\0'; 1033 1034 cryptpw = crypt(password, salt); 1035 if (cryptpw == NULL) 1036 errx(EX_CONFIG, "crypt(3) failure"); 1037 return strcpy(buf, cryptpw); 1038 } 1039 1040 1041 static char * 1042 pw_password(struct userconf * cnf, char const * user) 1043 { 1044 int i, l; 1045 char pwbuf[32]; 1046 1047 switch (cnf->default_password) { 1048 case -1: /* Random password */ 1049 l = (arc4random() % 8 + 8); /* 8 - 16 chars */ 1050 for (i = 0; i < l; i++) 1051 pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)]; 1052 pwbuf[i] = '\0'; 1053 1054 /* 1055 * We give this information back to the user 1056 */ 1057 if (conf.fd == -1 && !conf.dryrun) { 1058 if (isatty(STDOUT_FILENO)) 1059 printf("Password for '%s' is: ", user); 1060 printf("%s\n", pwbuf); 1061 fflush(stdout); 1062 } 1063 break; 1064 1065 case -2: /* No password at all! */ 1066 return ""; 1067 1068 case 0: /* No login - default */ 1069 default: 1070 return "*"; 1071 1072 case 1: /* user's name */ 1073 strlcpy(pwbuf, user, sizeof(pwbuf)); 1074 break; 1075 } 1076 return pw_pwcrypt(pwbuf); 1077 } 1078 1079 static int 1080 pw_userdel(char *name, long id) 1081 { 1082 struct passwd *pwd = NULL; 1083 char file[MAXPATHLEN]; 1084 char home[MAXPATHLEN]; 1085 uid_t uid; 1086 struct group *gr, *grp; 1087 char grname[LOGNAMESIZE]; 1088 int rc; 1089 struct stat st; 1090 int valid_type = _PWF_FILES; 1091 1092 if (id < 0 && name == NULL) 1093 errx(EX_DATAERR, "username or id required"); 1094 1095 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id); 1096 if (pwd == NULL) { 1097 if (name == NULL) 1098 errx(EX_NOUSER, "no such uid `%ld'", id); 1099 errx(EX_NOUSER, "no such user `%s'", name); 1100 } 1101 1102 if (conf.userconf->nispasswd && *conf.userconf->nispasswd == '/') 1103 valid_type = _PWF_NIS; 1104 1105 if (PWF._altdir == PWF_REGULAR && 1106 ((pwd->pw_fields & _PWF_SOURCE) != valid_type)) 1107 errx(EX_NOUSER, "no such %s user `%s'", 1108 valid_type == _PWF_FILES ? "local" : "NIS" , name); 1109 1110 uid = pwd->pw_uid; 1111 if (name == NULL) 1112 name = pwd->pw_name; 1113 1114 if (strcmp(pwd->pw_name, "root") == 0) 1115 errx(EX_DATAERR, "cannot remove user 'root'"); 1116 1117 /* Remove opie record from /etc/opiekeys */ 1118 1119 if (PWALTDIR() != PWF_ALT) 1120 rmopie(pwd->pw_name); 1121 1122 if (!PWALTDIR()) { 1123 /* Remove crontabs */ 1124 snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name); 1125 if (access(file, F_OK) == 0) { 1126 snprintf(file, sizeof(file), "crontab -u %s -r", pwd->pw_name); 1127 system(file); 1128 } 1129 } 1130 /* 1131 * Save these for later, since contents of pwd may be 1132 * invalidated by deletion 1133 */ 1134 snprintf(file, sizeof(file), "%s/%s", _PATH_MAILDIR, pwd->pw_name); 1135 strlcpy(home, pwd->pw_dir, sizeof(home)); 1136 gr = GETGRGID(pwd->pw_gid); 1137 if (gr != NULL) 1138 strlcpy(grname, gr->gr_name, LOGNAMESIZE); 1139 else 1140 grname[0] = '\0'; 1141 1142 rc = delpwent(pwd); 1143 if (rc == -1) 1144 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name); 1145 else if (rc != 0) 1146 err(EX_IOERR, "passwd update"); 1147 1148 if (conf.userconf->nispasswd && *conf.userconf->nispasswd=='/') { 1149 rc = delnispwent(conf.userconf->nispasswd, name); 1150 if (rc == -1) 1151 warnx("WARNING: user '%s' does not exist in NIS passwd", 1152 pwd->pw_name); 1153 else if (rc != 0) 1154 warn("WARNING: NIS passwd update"); 1155 /* non-fatal */ 1156 } 1157 1158 grp = GETGRNAM(name); 1159 if (grp != NULL && 1160 (grp->gr_mem == NULL || *grp->gr_mem == NULL) && 1161 strcmp(name, grname) == 0) 1162 delgrent(GETGRNAM(name)); 1163 SETGRENT(); 1164 while ((grp = GETGRENT()) != NULL) { 1165 int i, j; 1166 char group[MAXLOGNAME]; 1167 if (grp->gr_mem == NULL) 1168 continue; 1169 1170 for (i = 0; grp->gr_mem[i] != NULL; i++) { 1171 if (strcmp(grp->gr_mem[i], name) != 0) 1172 continue; 1173 1174 for (j = i; grp->gr_mem[j] != NULL; j++) 1175 grp->gr_mem[j] = grp->gr_mem[j+1]; 1176 strlcpy(group, grp->gr_name, MAXLOGNAME); 1177 chggrent(group, grp); 1178 } 1179 } 1180 ENDGRENT(); 1181 1182 pw_log(conf.userconf, M_DELETE, W_USER, "%s(%ju) account removed", name, 1183 (uintmax_t)uid); 1184 1185 /* Remove mail file */ 1186 if (PWALTDIR() != PWF_ALT) 1187 unlinkat(conf.rootfd, file + 1, 0); 1188 1189 /* Remove at jobs */ 1190 if (!PWALTDIR() && getpwuid(uid) == NULL) 1191 rmat(uid); 1192 1193 /* Remove home directory and contents */ 1194 if (PWALTDIR() != PWF_ALT && conf.deletehome && *home == '/' && 1195 getpwuid(uid) == NULL && 1196 fstatat(conf.rootfd, home + 1, &st, 0) != -1) { 1197 rm_r(conf.rootfd, home, uid); 1198 pw_log(conf.userconf, M_DELETE, W_USER, "%s(%ju) home '%s' %s" 1199 "removed", name, (uintmax_t)uid, home, 1200 fstatat(conf.rootfd, home + 1, &st, 0) == -1 ? "" : "not " 1201 "completely "); 1202 } 1203 1204 return (EXIT_SUCCESS); 1205 } 1206 1207 static int 1208 print_user(struct passwd * pwd) 1209 { 1210 if (!conf.pretty) { 1211 char *buf; 1212 1213 buf = conf.v7 ? pw_make_v7(pwd) : pw_make(pwd); 1214 printf("%s\n", buf); 1215 free(buf); 1216 } else { 1217 int j; 1218 char *p; 1219 struct group *grp = GETGRGID(pwd->pw_gid); 1220 char uname[60] = "User &", office[60] = "[None]", 1221 wphone[60] = "[None]", hphone[60] = "[None]"; 1222 char acexpire[32] = "[None]", pwexpire[32] = "[None]"; 1223 struct tm * tptr; 1224 1225 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) { 1226 strlcpy(uname, p, sizeof(uname)); 1227 if ((p = strtok(NULL, ",")) != NULL) { 1228 strlcpy(office, p, sizeof(office)); 1229 if ((p = strtok(NULL, ",")) != NULL) { 1230 strlcpy(wphone, p, sizeof(wphone)); 1231 if ((p = strtok(NULL, "")) != NULL) { 1232 strlcpy(hphone, p, 1233 sizeof(hphone)); 1234 } 1235 } 1236 } 1237 } 1238 /* 1239 * Handle '&' in gecos field 1240 */ 1241 if ((p = strchr(uname, '&')) != NULL) { 1242 int l = strlen(pwd->pw_name); 1243 int m = strlen(p); 1244 1245 memmove(p + l, p + 1, m); 1246 memmove(p, pwd->pw_name, l); 1247 *p = (char) toupper((unsigned char)*p); 1248 } 1249 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL) 1250 strftime(acexpire, sizeof acexpire, "%c", tptr); 1251 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL) 1252 strftime(pwexpire, sizeof pwexpire, "%c", tptr); 1253 printf("Login Name: %-15s #%-12ju Group: %-15s #%ju\n" 1254 " Full Name: %s\n" 1255 " Home: %-26.26s Class: %s\n" 1256 " Shell: %-26.26s Office: %s\n" 1257 "Work Phone: %-26.26s Home Phone: %s\n" 1258 "Acc Expire: %-26.26s Pwd Expire: %s\n", 1259 pwd->pw_name, (uintmax_t)pwd->pw_uid, 1260 grp ? grp->gr_name : "(invalid)", (uintmax_t)pwd->pw_gid, 1261 uname, pwd->pw_dir, pwd->pw_class, 1262 pwd->pw_shell, office, wphone, hphone, 1263 acexpire, pwexpire); 1264 SETGRENT(); 1265 j = 0; 1266 while ((grp=GETGRENT()) != NULL) 1267 { 1268 int i = 0; 1269 if (grp->gr_mem != NULL) { 1270 while (grp->gr_mem[i] != NULL) 1271 { 1272 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) 1273 { 1274 printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name); 1275 break; 1276 } 1277 ++i; 1278 } 1279 } 1280 } 1281 ENDGRENT(); 1282 printf("%s", j ? "\n" : ""); 1283 } 1284 return EXIT_SUCCESS; 1285 } 1286 1287 char * 1288 pw_checkname(char *name, int gecos) 1289 { 1290 char showch[8]; 1291 const char *badchars, *ch, *showtype; 1292 int reject; 1293 1294 ch = name; 1295 reject = 0; 1296 if (gecos) { 1297 /* See if the name is valid as a gecos (comment) field. */ 1298 badchars = ":!@"; 1299 showtype = "gecos field"; 1300 } else { 1301 /* See if the name is valid as a userid or group. */ 1302 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\""; 1303 showtype = "userid/group name"; 1304 /* Userids and groups can not have a leading '-'. */ 1305 if (*ch == '-') 1306 reject = 1; 1307 } 1308 if (!reject) { 1309 while (*ch) { 1310 if (strchr(badchars, *ch) != NULL || *ch < ' ' || 1311 *ch == 127) { 1312 reject = 1; 1313 break; 1314 } 1315 /* 8-bit characters are only allowed in GECOS fields */ 1316 if (!gecos && (*ch & 0x80)) { 1317 reject = 1; 1318 break; 1319 } 1320 ch++; 1321 } 1322 } 1323 /* 1324 * A `$' is allowed as the final character for userids and groups, 1325 * mainly for the benefit of samba. 1326 */ 1327 if (reject && !gecos) { 1328 if (*ch == '$' && *(ch + 1) == '\0') { 1329 reject = 0; 1330 ch++; 1331 } 1332 } 1333 if (reject) { 1334 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127) 1335 ? "`%c'" : "0x%02x", *ch); 1336 errx(EX_DATAERR, "invalid character %s at position %td in %s", 1337 showch, (ch - name), showtype); 1338 } 1339 if (!gecos && (ch - name) > LOGNAMESIZE) 1340 errx(EX_DATAERR, "name too long `%s' (max is %d)", name, 1341 LOGNAMESIZE); 1342 1343 return (name); 1344 } 1345 1346 1347 static void 1348 rmat(uid_t uid) 1349 { 1350 DIR *d = opendir("/var/at/jobs"); 1351 1352 if (d != NULL) { 1353 struct dirent *e; 1354 1355 while ((e = readdir(d)) != NULL) { 1356 struct stat st; 1357 1358 if (strncmp(e->d_name, ".lock", 5) != 0 && 1359 stat(e->d_name, &st) == 0 && 1360 !S_ISDIR(st.st_mode) && 1361 st.st_uid == uid) { 1362 char tmp[MAXPATHLEN]; 1363 1364 snprintf(tmp, sizeof(tmp), "/usr/bin/atrm %s", e->d_name); 1365 system(tmp); 1366 } 1367 } 1368 closedir(d); 1369 } 1370 } 1371 1372 static void 1373 rmopie(char const * name) 1374 { 1375 char tmp[1014]; 1376 FILE *fp; 1377 int fd; 1378 size_t len; 1379 off_t atofs = 0; 1380 1381 if ((fd = openat(conf.rootfd, "etc/opiekeys", O_RDWR)) == -1) 1382 return; 1383 1384 fp = fdopen(fd, "r+"); 1385 len = strlen(name); 1386 1387 while (fgets(tmp, sizeof(tmp), fp) != NULL) { 1388 if (strncmp(name, tmp, len) == 0 && tmp[len]==' ') { 1389 /* Comment username out */ 1390 if (fseek(fp, atofs, SEEK_SET) == 0) 1391 fwrite("#", 1, 1, fp); 1392 break; 1393 } 1394 atofs = ftell(fp); 1395 } 1396 /* 1397 * If we got an error of any sort, don't update! 1398 */ 1399 fclose(fp); 1400 } 1401