pw_user.c revision 285412
1236594Sobrien/*- 2236594Sobrien * Copyright (C) 1996 3236594Sobrien * David L. Nugent. All rights reserved. 4236594Sobrien * 5236594Sobrien * Redistribution and use in source and binary forms, with or without 6236594Sobrien * modification, are permitted provided that the following conditions 7236594Sobrien * are met: 8236594Sobrien * 1. Redistributions of source code must retain the above copyright 9236594Sobrien * notice, this list of conditions and the following disclaimer. 10236594Sobrien * 2. Redistributions in binary form must reproduce the above copyright 11236594Sobrien * notice, this list of conditions and the following disclaimer in the 12236594Sobrien * documentation and/or other materials provided with the distribution. 13236594Sobrien * 14236594Sobrien * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND 15236594Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16236594Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17236594Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE 18236594Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19236594Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20236594Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21236594Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22236594Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23236594Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24236594Sobrien * SUCH DAMAGE. 25236594Sobrien * 26236594Sobrien */ 27236594Sobrien 28236594Sobrien#ifndef lint 29236594Sobrienstatic const char rcsid[] = 30236594Sobrien "$FreeBSD: head/usr.sbin/pw/pw_user.c 285412 2015-07-11 23:07:17Z bapt $"; 31236594Sobrien#endif /* not lint */ 32236594Sobrien 33236594Sobrien#include <ctype.h> 34236594Sobrien#include <err.h> 35236594Sobrien#include <fcntl.h> 36236594Sobrien#include <sys/param.h> 37236594Sobrien#include <dirent.h> 38236594Sobrien#include <paths.h> 39236594Sobrien#include <termios.h> 40236594Sobrien#include <sys/types.h> 41236594Sobrien#include <sys/time.h> 42236594Sobrien#include <sys/resource.h> 43236594Sobrien#include <login_cap.h> 44236594Sobrien#include <pwd.h> 45236594Sobrien#include <grp.h> 46251368Sobrien#include <libutil.h> 47251368Sobrien#include "pw.h" 48251368Sobrien#include "bitmap.h" 49251368Sobrien 50236594Sobrien#define LOGNAMESIZE (MAXLOGNAME-1) 51236594Sobrien 52251368Sobrienstatic char locked_str[] = "*LOCKED*"; 53236594Sobrien 54236594Sobrienstatic int pw_userdel(char *name, long id); 55236594Sobrienstatic int print_user(struct passwd * pwd); 56236594Sobrienstatic uid_t pw_uidpolicy(struct userconf * cnf, long id); 57236594Sobrienstatic uid_t pw_gidpolicy(struct cargs * args, char *nam, gid_t prefer); 58236594Sobrienstatic time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args); 59236594Sobrienstatic time_t pw_exppolicy(struct userconf * cnf, struct cargs * args); 60236594Sobrienstatic char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user); 61236620Sobrienstatic char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell); 62236594Sobrienstatic char *pw_password(struct userconf * cnf, char const * user); 63236594Sobrienstatic char *shell_path(char const * path, char *shells[], char *sh); 64236594Sobrienstatic void rmat(uid_t uid); 65236594Sobrienstatic void rmopie(char const * name); 66236594Sobrien 67236594Sobrienstatic void 68236620Sobriencreate_and_populate_homedir(struct passwd *pwd) 69236620Sobrien{ 70236620Sobrien char *homedir, *dotdir; 71236620Sobrien struct userconf *cnf = conf.userconf; 72236620Sobrien 73251368Sobrien homedir = dotdir = NULL; 74236620Sobrien 75236620Sobrien if (conf.rootdir[0] != '\0') { 76236620Sobrien asprintf(&homedir, "%s/%s", conf.rootdir, pwd->pw_dir); 77236620Sobrien if (homedir == NULL) 78236594Sobrien errx(EX_OSERR, "out of memory"); 79236594Sobrien asprintf(&dotdir, "%s/%s", conf.rootdir, cnf->dotdir); 80236594Sobrien } 81236620Sobrien 82236594Sobrien copymkdir(homedir ? homedir : pwd->pw_dir, dotdir ? dotdir: cnf->dotdir, 83236594Sobrien cnf->homemode, pwd->pw_uid, pwd->pw_gid); 84236594Sobrien pw_log(cnf, M_ADD, W_USER, "%s(%u) home %s made", pwd->pw_name, 85 pwd->pw_uid, pwd->pw_dir); 86} 87 88static int 89set_passwd(struct passwd *pwd, bool update) 90{ 91 int b, istty; 92 struct termios t, n; 93 login_cap_t *lc; 94 char line[_PASSWORD_LEN+1]; 95 char *p; 96 97 if (conf.fd == '-') { 98 if (!pwd->pw_passwd || *pwd->pw_passwd != '*') { 99 pwd->pw_passwd = "*"; /* No access */ 100 return (1); 101 } 102 return (0); 103 } 104 105 if ((istty = isatty(conf.fd))) { 106 if (tcgetattr(conf.fd, &t) == -1) 107 istty = 0; 108 else { 109 n = t; 110 n.c_lflag &= ~(ECHO); 111 tcsetattr(conf.fd, TCSANOW, &n); 112 printf("%s%spassword for user %s:", 113 update ? "new " : "", 114 conf.precrypted ? "encrypted " : "", 115 pwd->pw_name); 116 fflush(stdout); 117 } 118 } 119 b = read(conf.fd, line, sizeof(line) - 1); 120 if (istty) { /* Restore state */ 121 tcsetattr(conf.fd, TCSANOW, &t); 122 fputc('\n', stdout); 123 fflush(stdout); 124 } 125 126 if (b < 0) 127 err(EX_IOERR, "-%c file descriptor", 128 conf.precrypted ? 'H' : 'h'); 129 line[b] = '\0'; 130 if ((p = strpbrk(line, "\r\n")) != NULL) 131 *p = '\0'; 132 if (!*line) 133 errx(EX_DATAERR, "empty password read on file descriptor %d", 134 conf.fd); 135 if (conf.precrypted) { 136 if (strchr(line, ':') != NULL) 137 errx(EX_DATAERR, "bad encrypted password"); 138 pwd->pw_passwd = line; 139 } else { 140 lc = login_getpwclass(pwd); 141 if (lc == NULL || 142 login_setcryptfmt(lc, "sha512", NULL) == NULL) 143 warn("setting crypt(3) format"); 144 login_close(lc); 145 pwd->pw_passwd = pw_pwcrypt(line); 146 } 147 return (1); 148} 149 150int 151pw_usernext(struct userconf *cnf, bool quiet) 152{ 153 uid_t next = pw_uidpolicy(cnf, -1); 154 155 if (quiet) 156 return (next); 157 158 printf("%u:", next); 159 pw_groupnext(cnf, quiet); 160 161 return (EXIT_SUCCESS); 162} 163 164static int 165pw_usershow(char *name, long id, struct passwd *fakeuser) 166{ 167 struct passwd *pwd = NULL; 168 169 if (id < 0 && name == NULL && !conf.all) 170 errx(EX_DATAERR, "username or id or '-a' required"); 171 172 if (conf.all) { 173 SETPWENT(); 174 while ((pwd = GETPWENT()) != NULL) 175 print_user(pwd); 176 ENDPWENT(); 177 return (EXIT_SUCCESS); 178 } 179 180 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id); 181 if (pwd == NULL) { 182 if (conf.force) { 183 pwd = fakeuser; 184 } else { 185 if (name == NULL) 186 errx(EX_NOUSER, "no such uid `%ld'", id); 187 errx(EX_NOUSER, "no such user `%s'", name); 188 } 189 } 190 191 return (print_user(pwd)); 192} 193 194static void 195perform_chgpwent(const char *name, struct passwd *pwd) 196{ 197 int rc; 198 199 rc = chgpwent(name, pwd); 200 if (rc == -1) 201 errx(EX_IOERR, "user '%s' does not exist (NIS?)", pwd->pw_name); 202 else if (rc != 0) 203 err(EX_IOERR, "passwd file update"); 204 205 if (conf.userconf->nispasswd && *conf.userconf->nispasswd == '/') { 206 rc = chgnispwent(conf.userconf->nispasswd, name, pwd); 207 if (rc == -1) 208 warn("User '%s' not found in NIS passwd", pwd->pw_name); 209 else 210 warn("NIS passwd update"); 211 /* NOTE: NIS-only update errors are not fatal */ 212 } 213} 214 215/* 216 * The M_LOCK and M_UNLOCK functions simply add or remove 217 * a "*LOCKED*" prefix from in front of the password to 218 * prevent it decoding correctly, and therefore prevents 219 * access. Of course, this only prevents access via 220 * password authentication (not ssh, kerberos or any 221 * other method that does not use the UNIX password) but 222 * that is a known limitation. 223 */ 224static int 225pw_userlock(char *name, long id, int mode) 226{ 227 struct passwd *pwd = NULL; 228 char *passtmp = NULL; 229 bool locked = false; 230 231 if (id < 0 && name == NULL) 232 errx(EX_DATAERR, "username or id required"); 233 234 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id); 235 if (pwd == NULL) { 236 if (name == NULL) 237 errx(EX_NOUSER, "no such uid `%ld'", id); 238 errx(EX_NOUSER, "no such user `%s'", name); 239 } 240 241 if (name == NULL) 242 name = pwd->pw_name; 243 244 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str) -1) == 0) 245 locked = true; 246 if (mode == M_LOCK && locked) 247 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name); 248 if (mode == M_UNLOCK && !locked) 249 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name); 250 251 if (mode == M_LOCK) { 252 asprintf(&passtmp, "%s%s", locked_str, pwd->pw_passwd); 253 if (passtmp == NULL) /* disaster */ 254 errx(EX_UNAVAILABLE, "out of memory"); 255 pwd->pw_passwd = passtmp; 256 } else { 257 pwd->pw_passwd += sizeof(locked_str)-1; 258 } 259 260 perform_chgpwent(name, pwd); 261 free(passtmp); 262 263 return (EXIT_SUCCESS); 264} 265 266/*- 267 * -C config configuration file 268 * -q quiet operation 269 * -n name login name 270 * -u uid user id 271 * -c comment user name/comment 272 * -d directory home directory 273 * -e date account expiry date 274 * -p date password expiry date 275 * -g grp primary group 276 * -G grp1,grp2 additional groups 277 * -m [ -k dir ] create and set up home 278 * -s shell name of login shell 279 * -o duplicate uid ok 280 * -L class user class 281 * -l name new login name 282 * -h fd password filehandle 283 * -H fd encrypted password filehandle 284 * -F force print or add 285 * Setting defaults: 286 * -D set user defaults 287 * -b dir default home root dir 288 * -e period default expiry period 289 * -p period default password change period 290 * -g group default group 291 * -G grp1,grp2.. default additional groups 292 * -L class default login class 293 * -k dir default home skeleton 294 * -s shell default shell 295 * -w method default password method 296 */ 297 298int 299pw_user(int mode, char *name, long id, struct cargs * args) 300{ 301 int rc, edited = 0; 302 char *p = NULL; 303 struct carg *arg; 304 struct passwd *pwd = NULL; 305 struct group *grp; 306 struct stat st; 307 struct userconf *cnf; 308 char line[_PASSWORD_LEN+1]; 309 char path[MAXPATHLEN]; 310 FILE *fp; 311 char *dmode_c; 312 void *set = NULL; 313 314 static struct passwd fakeuser = 315 { 316 "nouser", 317 "*", 318 -1, 319 -1, 320 0, 321 "", 322 "User &", 323 "/nonexistent", 324 "/bin/sh", 325 0 326#if defined(__FreeBSD__) 327 ,0 328#endif 329 }; 330 331 cnf = conf.userconf; 332 333 if (mode == M_NEXT) 334 return (pw_usernext(cnf, conf.quiet)); 335 336 if (mode == M_PRINT) 337 return (pw_usershow(name, id, &fakeuser)); 338 339 if (mode == M_DELETE) 340 return (pw_userdel(name, id)); 341 342 if (mode == M_LOCK || mode == M_UNLOCK) 343 return (pw_userlock(name, id, mode)); 344 345 /* 346 * We can do all of the common legwork here 347 */ 348 349 if ((arg = getarg(args, 'b')) != NULL) { 350 cnf->home = arg->val; 351 } 352 353 if ((arg = getarg(args, 'M')) != NULL) { 354 dmode_c = arg->val; 355 if ((set = setmode(dmode_c)) == NULL) 356 errx(EX_DATAERR, "invalid directory creation mode '%s'", 357 dmode_c); 358 cnf->homemode = getmode(set, _DEF_DIRMODE); 359 free(set); 360 } 361 362 /* 363 * If we'll need to use it or we're updating it, 364 * then create the base home directory if necessary 365 */ 366 if (arg != NULL || getarg(args, 'm') != NULL) { 367 int l = strlen(cnf->home); 368 369 if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */ 370 cnf->home[--l] = '\0'; 371 372 if (l < 2 || *cnf->home != '/') /* Check for absolute path name */ 373 errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home); 374 375 if (stat(cnf->home, &st) == -1) { 376 char dbuf[MAXPATHLEN]; 377 378 /* 379 * This is a kludge especially for Joerg :) 380 * If the home directory would be created in the root partition, then 381 * we really create it under /usr which is likely to have more space. 382 * But we create a symlink from cnf->home -> "/usr" -> cnf->home 383 */ 384 if (strchr(cnf->home+1, '/') == NULL) { 385 snprintf(dbuf, MAXPATHLEN, "/usr%s", cnf->home); 386 if (mkdir(dbuf, _DEF_DIRMODE) != -1 || errno == EEXIST) { 387 chown(dbuf, 0, 0); 388 /* 389 * Skip first "/" and create symlink: 390 * /home -> usr/home 391 */ 392 symlink(dbuf+1, cnf->home); 393 } 394 /* If this falls, fall back to old method */ 395 } 396 strlcpy(dbuf, cnf->home, sizeof(dbuf)); 397 p = dbuf; 398 if (stat(dbuf, &st) == -1) { 399 while ((p = strchr(p + 1, '/')) != NULL) { 400 *p = '\0'; 401 if (stat(dbuf, &st) == -1) { 402 if (mkdir(dbuf, _DEF_DIRMODE) == -1) 403 err(EX_OSFILE, "mkdir '%s'", dbuf); 404 chown(dbuf, 0, 0); 405 } else if (!S_ISDIR(st.st_mode)) 406 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf); 407 *p = '/'; 408 } 409 } 410 if (stat(dbuf, &st) == -1) { 411 if (mkdir(dbuf, _DEF_DIRMODE) == -1) 412 err(EX_OSFILE, "mkdir '%s'", dbuf); 413 chown(dbuf, 0, 0); 414 } 415 } else if (!S_ISDIR(st.st_mode)) 416 errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home); 417 } 418 419 if ((arg = getarg(args, 'e')) != NULL) 420 cnf->expire_days = atoi(arg->val); 421 422 if ((arg = getarg(args, 'y')) != NULL) 423 cnf->nispasswd = arg->val; 424 425 if ((arg = getarg(args, 'p')) != NULL && arg->val) 426 cnf->password_days = atoi(arg->val); 427 428 if ((arg = getarg(args, 'g')) != NULL) { 429 if (!*(p = arg->val)) /* Handle empty group list specially */ 430 cnf->default_group = ""; 431 else { 432 if ((grp = GETGRNAM(p)) == NULL) { 433 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 434 errx(EX_NOUSER, "group `%s' does not exist", p); 435 } 436 cnf->default_group = newstr(grp->gr_name); 437 } 438 } 439 if ((arg = getarg(args, 'L')) != NULL) 440 cnf->default_class = pw_checkname(arg->val, 0); 441 442 if ((arg = getarg(args, 'G')) != NULL && arg->val) { 443 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) { 444 if ((grp = GETGRNAM(p)) == NULL) { 445 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 446 errx(EX_NOUSER, "group `%s' does not exist", p); 447 } 448 sl_add(cnf->groups, newstr(grp->gr_name)); 449 } 450 } 451 452 if ((arg = getarg(args, 'k')) != NULL) { 453 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode)) 454 errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir); 455 } 456 457 if ((arg = getarg(args, 's')) != NULL) 458 cnf->shell_default = arg->val; 459 460 if ((arg = getarg(args, 'w')) != NULL) 461 cnf->default_password = boolean_val(arg->val, cnf->default_password); 462 if (mode == M_ADD && getarg(args, 'D')) { 463 if (name != NULL) 464 errx(EX_DATAERR, "can't combine `-D' with `-n name'"); 465 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 466 if ((cnf->min_uid = (uid_t) atoi(p)) == 0) 467 cnf->min_uid = 1000; 468 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid) 469 cnf->max_uid = 32000; 470 } 471 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 472 if ((cnf->min_gid = (gid_t) atoi(p)) == 0) 473 cnf->min_gid = 1000; 474 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid) 475 cnf->max_gid = 32000; 476 } 477 478 if (write_userconfig(conf.config)) 479 return (EXIT_SUCCESS); 480 err(EX_IOERR, "config udpate"); 481 } 482 483 if (name != NULL) 484 pwd = GETPWNAM(pw_checkname(name, 0)); 485 486 if (id < 0 && name == NULL) 487 errx(EX_DATAERR, "user name or id required"); 488 489 /* 490 * Update require that the user exists 491 */ 492 if (mode == M_UPDATE) { 493 494 if (name == NULL && pwd == NULL) /* Try harder */ 495 pwd = GETPWUID(id); 496 497 if (pwd == NULL) { 498 if (name == NULL) 499 errx(EX_NOUSER, "no such uid `%ld'", id); 500 errx(EX_NOUSER, "no such user `%s'", name); 501 } 502 503 if (name == NULL) 504 name = pwd->pw_name; 505 506 /* 507 * The rest is edit code 508 */ 509 if (conf.newname != NULL) { 510 if (strcmp(pwd->pw_name, "root") == 0) 511 errx(EX_DATAERR, "can't rename `root' account"); 512 pwd->pw_name = pw_checkname(conf.newname, 0); 513 edited = 1; 514 } 515 516 if (id > 0 && isdigit((unsigned char)*arg->val)) { 517 pwd->pw_uid = (uid_t)id; 518 edited = 1; 519 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0) 520 errx(EX_DATAERR, "can't change uid of `root' account"); 521 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 522 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name); 523 } 524 525 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) { /* Already checked this */ 526 gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid; 527 if (newgid != pwd->pw_gid) { 528 edited = 1; 529 pwd->pw_gid = newgid; 530 } 531 } 532 533 if ((arg = getarg(args, 'p')) != NULL) { 534 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 535 if (pwd->pw_change != 0) { 536 pwd->pw_change = 0; 537 edited = 1; 538 } 539 } 540 else { 541 time_t now = time(NULL); 542 time_t expire = parse_date(now, arg->val); 543 544 if (pwd->pw_change != expire) { 545 pwd->pw_change = expire; 546 edited = 1; 547 } 548 } 549 } 550 551 if ((arg = getarg(args, 'e')) != NULL) { 552 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 553 if (pwd->pw_expire != 0) { 554 pwd->pw_expire = 0; 555 edited = 1; 556 } 557 } 558 else { 559 time_t now = time(NULL); 560 time_t expire = parse_date(now, arg->val); 561 562 if (pwd->pw_expire != expire) { 563 pwd->pw_expire = expire; 564 edited = 1; 565 } 566 } 567 } 568 569 if ((arg = getarg(args, 's')) != NULL) { 570 char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val); 571 if (shell == NULL) 572 shell = ""; 573 if (strcmp(shell, pwd->pw_shell) != 0) { 574 pwd->pw_shell = shell; 575 edited = 1; 576 } 577 } 578 579 if (getarg(args, 'L')) { 580 if (cnf->default_class == NULL) 581 cnf->default_class = ""; 582 if (strcmp(pwd->pw_class, cnf->default_class) != 0) { 583 pwd->pw_class = cnf->default_class; 584 edited = 1; 585 } 586 } 587 588 if ((arg = getarg(args, 'd')) != NULL) { 589 if (strcmp(pwd->pw_dir, arg->val)) 590 edited = 1; 591 if (stat(pwd->pw_dir = arg->val, &st) == -1) { 592 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0) 593 warnx("WARNING: home `%s' does not exist", pwd->pw_dir); 594 } else if (!S_ISDIR(st.st_mode)) 595 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir); 596 } 597 598 if ((arg = getarg(args, 'w')) != NULL && conf.fd == -1) { 599 login_cap_t *lc; 600 601 lc = login_getpwclass(pwd); 602 if (lc == NULL || 603 login_setcryptfmt(lc, "sha512", NULL) == NULL) 604 warn("setting crypt(3) format"); 605 login_close(lc); 606 pwd->pw_passwd = pw_password(cnf, pwd->pw_name); 607 edited = 1; 608 } 609 610 } else { 611 login_cap_t *lc; 612 613 /* 614 * Add code 615 */ 616 617 if (name == NULL) /* Required */ 618 errx(EX_DATAERR, "login name required"); 619 else if ((pwd = GETPWNAM(name)) != NULL) /* Exists */ 620 errx(EX_DATAERR, "login name `%s' already exists", name); 621 622 /* 623 * Now, set up defaults for a new user 624 */ 625 pwd = &fakeuser; 626 pwd->pw_name = name; 627 pwd->pw_class = cnf->default_class ? cnf->default_class : ""; 628 pwd->pw_uid = pw_uidpolicy(cnf, id); 629 pwd->pw_gid = pw_gidpolicy(args, pwd->pw_name, (gid_t) pwd->pw_uid); 630 pwd->pw_change = pw_pwdpolicy(cnf, args); 631 pwd->pw_expire = pw_exppolicy(cnf, args); 632 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name); 633 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL); 634 lc = login_getpwclass(pwd); 635 if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL) 636 warn("setting crypt(3) format"); 637 login_close(lc); 638 pwd->pw_passwd = pw_password(cnf, pwd->pw_name); 639 edited = 1; 640 641 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 642 warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name); 643 } 644 645 /* 646 * Shared add/edit code 647 */ 648 if (conf.gecos != NULL) { 649 if (strcmp(pwd->pw_gecos, conf.gecos) != 0) { 650 pwd->pw_gecos = conf.gecos; 651 edited = 1; 652 } 653 } 654 655 if (conf.fd != -1) 656 edited = set_passwd(pwd, mode == M_UPDATE); 657 658 /* 659 * Special case: -N only displays & exits 660 */ 661 if (conf.dryrun) 662 return print_user(pwd); 663 664 if (mode == M_ADD) { 665 edited = 1; /* Always */ 666 rc = addpwent(pwd); 667 if (rc == -1) 668 errx(EX_IOERR, "user '%s' already exists", 669 pwd->pw_name); 670 else if (rc != 0) 671 err(EX_IOERR, "passwd file update"); 672 if (cnf->nispasswd && *cnf->nispasswd=='/') { 673 rc = addnispwent(cnf->nispasswd, pwd); 674 if (rc == -1) 675 warnx("User '%s' already exists in NIS passwd", pwd->pw_name); 676 else 677 warn("NIS passwd update"); 678 /* NOTE: we treat NIS-only update errors as non-fatal */ 679 } 680 } else if (mode == M_UPDATE && edited) /* Only updated this if required */ 681 perform_chgpwent(name, pwd); 682 683 /* 684 * Ok, user is created or changed - now edit group file 685 */ 686 687 if (mode == M_ADD || getarg(args, 'G') != NULL) { 688 int j; 689 size_t i; 690 /* First remove the user from all group */ 691 SETGRENT(); 692 while ((grp = GETGRENT()) != NULL) { 693 char group[MAXLOGNAME]; 694 if (grp->gr_mem == NULL) 695 continue; 696 for (i = 0; grp->gr_mem[i] != NULL; i++) { 697 if (strcmp(grp->gr_mem[i] , pwd->pw_name) != 0) 698 continue; 699 for (j = i; grp->gr_mem[j] != NULL ; j++) 700 grp->gr_mem[j] = grp->gr_mem[j+1]; 701 strlcpy(group, grp->gr_name, MAXLOGNAME); 702 chggrent(group, grp); 703 } 704 } 705 ENDGRENT(); 706 707 /* now add to group where needed */ 708 for (i = 0; i < cnf->groups->sl_cur; i++) { 709 grp = GETGRNAM(cnf->groups->sl_str[i]); 710 grp = gr_add(grp, pwd->pw_name); 711 /* 712 * grp can only be NULL in 2 cases: 713 * - the new member is already a member 714 * - a problem with memory occurs 715 * in both cases we want to skip now. 716 */ 717 if (grp == NULL) 718 continue; 719 chggrent(grp->gr_name, grp); 720 free(grp); 721 } 722 } 723 724 725 /* go get a current version of pwd */ 726 pwd = GETPWNAM(name); 727 if (pwd == NULL) { 728 /* This will fail when we rename, so special case that */ 729 if (mode == M_UPDATE && conf.newname != NULL) { 730 name = conf.newname; /* update new name */ 731 pwd = GETPWNAM(name); /* refetch renamed rec */ 732 } 733 } 734 if (pwd == NULL) /* can't go on without this */ 735 errx(EX_NOUSER, "user '%s' disappeared during update", name); 736 737 grp = GETGRGID(pwd->pw_gid); 738 pw_log(cnf, mode, W_USER, "%s(%u):%s(%u):%s:%s:%s", 739 pwd->pw_name, pwd->pw_uid, 740 grp ? grp->gr_name : "unknown", (grp ? grp->gr_gid : (uid_t)-1), 741 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 742 743 /* 744 * If adding, let's touch and chown the user's mail file. This is not 745 * strictly necessary under BSD with a 0755 maildir but it also 746 * doesn't hurt anything to create the empty mailfile 747 */ 748 if (mode == M_ADD) { 749 if (PWALTDIR() != PWF_ALT) { 750 arg = getarg(args, 'R'); 751 snprintf(path, sizeof(path), "%s%s/%s", 752 arg ? arg->val : "", _PATH_MAILDIR, pwd->pw_name); 753 close(open(path, O_RDWR | O_CREAT, 0600)); /* Preserve contents & 754 * mtime */ 755 chown(path, pwd->pw_uid, pwd->pw_gid); 756 } 757 } 758 759 /* 760 * Let's create and populate the user's home directory. Note 761 * that this also `works' for editing users if -m is used, but 762 * existing files will *not* be overwritten. 763 */ 764 if (PWALTDIR() != PWF_ALT && getarg(args, 'm') != NULL && pwd->pw_dir && 765 *pwd->pw_dir == '/' && pwd->pw_dir[1]) 766 create_and_populate_homedir(pwd); 767 768 /* 769 * Finally, send mail to the new user as well, if we are asked to 770 */ 771 if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) { 772 FILE *pfp = popen(_PATH_SENDMAIL " -t", "w"); 773 774 if (pfp == NULL) 775 warn("sendmail"); 776 else { 777 fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name); 778 while (fgets(line, sizeof(line), fp) != NULL) { 779 /* Do substitutions? */ 780 fputs(line, pfp); 781 } 782 pclose(pfp); 783 pw_log(cnf, mode, W_USER, "%s(%u) new user mail sent", 784 pwd->pw_name, pwd->pw_uid); 785 } 786 fclose(fp); 787 } 788 789 return EXIT_SUCCESS; 790} 791 792 793static uid_t 794pw_uidpolicy(struct userconf * cnf, long id) 795{ 796 struct passwd *pwd; 797 uid_t uid = (uid_t) - 1; 798 799 /* 800 * Check the given uid, if any 801 */ 802 if (id > 0) { 803 uid = (uid_t) id; 804 805 if ((pwd = GETPWUID(uid)) != NULL && conf.checkduplicate) 806 errx(EX_DATAERR, "uid `%u' has already been allocated", pwd->pw_uid); 807 } else { 808 struct bitmap bm; 809 810 /* 811 * We need to allocate the next available uid under one of 812 * two policies a) Grab the first unused uid b) Grab the 813 * highest possible unused uid 814 */ 815 if (cnf->min_uid >= cnf->max_uid) { /* Sanity 816 * claus^H^H^H^Hheck */ 817 cnf->min_uid = 1000; 818 cnf->max_uid = 32000; 819 } 820 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1); 821 822 /* 823 * Now, let's fill the bitmap from the password file 824 */ 825 SETPWENT(); 826 while ((pwd = GETPWENT()) != NULL) 827 if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid) 828 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid); 829 ENDPWENT(); 830 831 /* 832 * Then apply the policy, with fallback to reuse if necessary 833 */ 834 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid) 835 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid); 836 837 /* 838 * Another sanity check 839 */ 840 if (uid < cnf->min_uid || uid > cnf->max_uid) 841 errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used"); 842 bm_dealloc(&bm); 843 } 844 return uid; 845} 846 847 848static uid_t 849pw_gidpolicy(struct cargs * args, char *nam, gid_t prefer) 850{ 851 struct group *grp; 852 gid_t gid = (uid_t) - 1; 853 struct carg *a_gid = getarg(args, 'g'); 854 struct userconf *cnf = conf.userconf; 855 856 /* 857 * If no arg given, see if default can help out 858 */ 859 if (a_gid == NULL && cnf->default_group && *cnf->default_group) 860 a_gid = addarg(args, 'g', cnf->default_group); 861 862 /* 863 * Check the given gid, if any 864 */ 865 SETGRENT(); 866 if (a_gid != NULL) { 867 if ((grp = GETGRNAM(a_gid->val)) == NULL) { 868 gid = (gid_t) atol(a_gid->val); 869 if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL) 870 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val); 871 } 872 gid = grp->gr_gid; 873 } else if ((grp = GETGRNAM(nam)) != NULL && 874 (grp->gr_mem == NULL || grp->gr_mem[0] == NULL)) { 875 gid = grp->gr_gid; /* Already created? Use it anyway... */ 876 } else { 877 struct cargs grpargs; 878 char tmp[32]; 879 880 LIST_INIT(&grpargs); 881 882 /* 883 * We need to auto-create a group with the user's name. We 884 * can send all the appropriate output to our sister routine 885 * bit first see if we can create a group with gid==uid so we 886 * can keep the user and group ids in sync. We purposely do 887 * NOT check the gid range if we can force the sync. If the 888 * user's name dups an existing group, then the group add 889 * function will happily handle that case for us and exit. 890 */ 891 if (GETGRGID(prefer) == NULL) { 892 snprintf(tmp, sizeof(tmp), "%u", prefer); 893 addarg(&grpargs, 'g', tmp); 894 } 895 if (conf.dryrun) { 896 gid = pw_groupnext(cnf, true); 897 } else { 898 pw_group(M_ADD, nam, -1, &grpargs); 899 if ((grp = GETGRNAM(nam)) != NULL) 900 gid = grp->gr_gid; 901 } 902 a_gid = LIST_FIRST(&grpargs); 903 while (a_gid != NULL) { 904 struct carg *t = LIST_NEXT(a_gid, list); 905 LIST_REMOVE(a_gid, list); 906 a_gid = t; 907 } 908 } 909 ENDGRENT(); 910 return gid; 911} 912 913 914static time_t 915pw_pwdpolicy(struct userconf * cnf, struct cargs * args) 916{ 917 time_t result = 0; 918 time_t now = time(NULL); 919 struct carg *arg = getarg(args, 'p'); 920 921 if (arg != NULL) { 922 if ((result = parse_date(now, arg->val)) == now) 923 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 924 } else if (cnf->password_days > 0) 925 result = now + ((long) cnf->password_days * 86400L); 926 return result; 927} 928 929 930static time_t 931pw_exppolicy(struct userconf * cnf, struct cargs * args) 932{ 933 time_t result = 0; 934 time_t now = time(NULL); 935 struct carg *arg = getarg(args, 'e'); 936 937 if (arg != NULL) { 938 if ((result = parse_date(now, arg->val)) == now) 939 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 940 } else if (cnf->expire_days > 0) 941 result = now + ((long) cnf->expire_days * 86400L); 942 return result; 943} 944 945 946static char * 947pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user) 948{ 949 struct carg *arg = getarg(args, 'd'); 950 static char home[128]; 951 952 if (arg) 953 return (arg->val); 954 955 if (cnf->home == NULL || *cnf->home == '\0') 956 errx(EX_CONFIG, "no base home directory set"); 957 snprintf(home, sizeof(home), "%s/%s", cnf->home, user); 958 959 return (home); 960} 961 962static char * 963shell_path(char const * path, char *shells[], char *sh) 964{ 965 if (sh != NULL && (*sh == '/' || *sh == '\0')) 966 return sh; /* specified full path or forced none */ 967 else { 968 char *p; 969 char paths[_UC_MAXLINE]; 970 971 /* 972 * We need to search paths 973 */ 974 strlcpy(paths, path, sizeof(paths)); 975 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) { 976 int i; 977 static char shellpath[256]; 978 979 if (sh != NULL) { 980 snprintf(shellpath, sizeof(shellpath), "%s/%s", p, sh); 981 if (access(shellpath, X_OK) == 0) 982 return shellpath; 983 } else 984 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) { 985 snprintf(shellpath, sizeof(shellpath), "%s/%s", p, shells[i]); 986 if (access(shellpath, X_OK) == 0) 987 return shellpath; 988 } 989 } 990 if (sh == NULL) 991 errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh); 992 errx(EX_CONFIG, "no default shell available or defined"); 993 return NULL; 994 } 995} 996 997 998static char * 999pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell) 1000{ 1001 char *sh = newshell; 1002 struct carg *arg = getarg(args, 's'); 1003 1004 if (newshell == NULL && arg != NULL) 1005 sh = arg->val; 1006 return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default); 1007} 1008 1009#define SALTSIZE 32 1010 1011static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./"; 1012 1013char * 1014pw_pwcrypt(char *password) 1015{ 1016 int i; 1017 char salt[SALTSIZE + 1]; 1018 char *cryptpw; 1019 1020 static char buf[256]; 1021 1022 /* 1023 * Calculate a salt value 1024 */ 1025 for (i = 0; i < SALTSIZE; i++) 1026 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)]; 1027 salt[SALTSIZE] = '\0'; 1028 1029 cryptpw = crypt(password, salt); 1030 if (cryptpw == NULL) 1031 errx(EX_CONFIG, "crypt(3) failure"); 1032 return strcpy(buf, cryptpw); 1033} 1034 1035 1036static char * 1037pw_password(struct userconf * cnf, char const * user) 1038{ 1039 int i, l; 1040 char pwbuf[32]; 1041 1042 switch (cnf->default_password) { 1043 case -1: /* Random password */ 1044 l = (arc4random() % 8 + 8); /* 8 - 16 chars */ 1045 for (i = 0; i < l; i++) 1046 pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)]; 1047 pwbuf[i] = '\0'; 1048 1049 /* 1050 * We give this information back to the user 1051 */ 1052 if (conf.fd == -1 && !conf.dryrun) { 1053 if (isatty(STDOUT_FILENO)) 1054 printf("Password for '%s' is: ", user); 1055 printf("%s\n", pwbuf); 1056 fflush(stdout); 1057 } 1058 break; 1059 1060 case -2: /* No password at all! */ 1061 return ""; 1062 1063 case 0: /* No login - default */ 1064 default: 1065 return "*"; 1066 1067 case 1: /* user's name */ 1068 strlcpy(pwbuf, user, sizeof(pwbuf)); 1069 break; 1070 } 1071 return pw_pwcrypt(pwbuf); 1072} 1073 1074static int 1075pw_userdel(char *name, long id) 1076{ 1077 struct passwd *pwd = NULL; 1078 char file[MAXPATHLEN]; 1079 char home[MAXPATHLEN]; 1080 uid_t uid; 1081 struct group *gr, *grp; 1082 char grname[LOGNAMESIZE]; 1083 int rc; 1084 struct stat st; 1085 1086 if (id < 0 && name == NULL) 1087 errx(EX_DATAERR, "username or id required"); 1088 1089 pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id); 1090 if (pwd == NULL) { 1091 if (name == NULL) 1092 errx(EX_NOUSER, "no such uid `%ld'", id); 1093 errx(EX_NOUSER, "no such user `%s'", name); 1094 } 1095 uid = pwd->pw_uid; 1096 if (name == NULL) 1097 name = pwd->pw_name; 1098 1099 if (strcmp(pwd->pw_name, "root") == 0) 1100 errx(EX_DATAERR, "cannot remove user 'root'"); 1101 1102 if (!PWALTDIR()) { 1103 /* 1104 * Remove opie record from /etc/opiekeys 1105 */ 1106 1107 rmopie(pwd->pw_name); 1108 1109 /* 1110 * Remove crontabs 1111 */ 1112 snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name); 1113 if (access(file, F_OK) == 0) { 1114 snprintf(file, sizeof(file), "crontab -u %s -r", pwd->pw_name); 1115 system(file); 1116 } 1117 } 1118 /* 1119 * Save these for later, since contents of pwd may be 1120 * invalidated by deletion 1121 */ 1122 snprintf(file, sizeof(file), "%s/%s", _PATH_MAILDIR, pwd->pw_name); 1123 strlcpy(home, pwd->pw_dir, sizeof(home)); 1124 gr = GETGRGID(pwd->pw_gid); 1125 if (gr != NULL) 1126 strlcpy(grname, gr->gr_name, LOGNAMESIZE); 1127 else 1128 grname[0] = '\0'; 1129 1130 rc = delpwent(pwd); 1131 if (rc == -1) 1132 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name); 1133 else if (rc != 0) 1134 err(EX_IOERR, "passwd update"); 1135 1136 if (conf.userconf->nispasswd && *conf.userconf->nispasswd=='/') { 1137 rc = delnispwent(conf.userconf->nispasswd, name); 1138 if (rc == -1) 1139 warnx("WARNING: user '%s' does not exist in NIS passwd", 1140 pwd->pw_name); 1141 else if (rc != 0) 1142 warn("WARNING: NIS passwd update"); 1143 /* non-fatal */ 1144 } 1145 1146 grp = GETGRNAM(name); 1147 if (grp != NULL && 1148 (grp->gr_mem == NULL || *grp->gr_mem == NULL) && 1149 strcmp(name, grname) == 0) 1150 delgrent(GETGRNAM(name)); 1151 SETGRENT(); 1152 while ((grp = GETGRENT()) != NULL) { 1153 int i, j; 1154 char group[MAXLOGNAME]; 1155 if (grp->gr_mem == NULL) 1156 continue; 1157 1158 for (i = 0; grp->gr_mem[i] != NULL; i++) { 1159 if (strcmp(grp->gr_mem[i], name) != 0) 1160 continue; 1161 1162 for (j = i; grp->gr_mem[j] != NULL; j++) 1163 grp->gr_mem[j] = grp->gr_mem[j+1]; 1164 strlcpy(group, grp->gr_name, MAXLOGNAME); 1165 chggrent(group, grp); 1166 } 1167 } 1168 ENDGRENT(); 1169 1170 pw_log(conf.userconf, M_DELETE, W_USER, "%s(%u) account removed", name, 1171 uid); 1172 1173 if (!PWALTDIR()) { 1174 /* 1175 * Remove mail file 1176 */ 1177 remove(file); 1178 1179 /* 1180 * Remove at jobs 1181 */ 1182 if (getpwuid(uid) == NULL) 1183 rmat(uid); 1184 1185 /* 1186 * Remove home directory and contents 1187 */ 1188 if (conf.deletehome && *home == '/' && getpwuid(uid) == NULL && 1189 stat(home, &st) != -1) { 1190 rm_r(home, uid); 1191 pw_log(conf.userconf, M_DELETE, W_USER, "%s(%u) home '%s' %sremoved", 1192 name, uid, home, 1193 stat(home, &st) == -1 ? "" : "not completely "); 1194 } 1195 } 1196 1197 return (EXIT_SUCCESS); 1198} 1199 1200static int 1201print_user(struct passwd * pwd) 1202{ 1203 if (!conf.pretty) { 1204 char *buf; 1205 1206 buf = conf.v7 ? pw_make_v7(pwd) : pw_make(pwd); 1207 printf("%s\n", buf); 1208 free(buf); 1209 } else { 1210 int j; 1211 char *p; 1212 struct group *grp = GETGRGID(pwd->pw_gid); 1213 char uname[60] = "User &", office[60] = "[None]", 1214 wphone[60] = "[None]", hphone[60] = "[None]"; 1215 char acexpire[32] = "[None]", pwexpire[32] = "[None]"; 1216 struct tm * tptr; 1217 1218 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) { 1219 strlcpy(uname, p, sizeof(uname)); 1220 if ((p = strtok(NULL, ",")) != NULL) { 1221 strlcpy(office, p, sizeof(office)); 1222 if ((p = strtok(NULL, ",")) != NULL) { 1223 strlcpy(wphone, p, sizeof(wphone)); 1224 if ((p = strtok(NULL, "")) != NULL) { 1225 strlcpy(hphone, p, 1226 sizeof(hphone)); 1227 } 1228 } 1229 } 1230 } 1231 /* 1232 * Handle '&' in gecos field 1233 */ 1234 if ((p = strchr(uname, '&')) != NULL) { 1235 int l = strlen(pwd->pw_name); 1236 int m = strlen(p); 1237 1238 memmove(p + l, p + 1, m); 1239 memmove(p, pwd->pw_name, l); 1240 *p = (char) toupper((unsigned char)*p); 1241 } 1242 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL) 1243 strftime(acexpire, sizeof acexpire, "%c", tptr); 1244 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL) 1245 strftime(pwexpire, sizeof pwexpire, "%c", tptr); 1246 printf("Login Name: %-15s #%-12u Group: %-15s #%u\n" 1247 " Full Name: %s\n" 1248 " Home: %-26.26s Class: %s\n" 1249 " Shell: %-26.26s Office: %s\n" 1250 "Work Phone: %-26.26s Home Phone: %s\n" 1251 "Acc Expire: %-26.26s Pwd Expire: %s\n", 1252 pwd->pw_name, pwd->pw_uid, 1253 grp ? grp->gr_name : "(invalid)", pwd->pw_gid, 1254 uname, pwd->pw_dir, pwd->pw_class, 1255 pwd->pw_shell, office, wphone, hphone, 1256 acexpire, pwexpire); 1257 SETGRENT(); 1258 j = 0; 1259 while ((grp=GETGRENT()) != NULL) 1260 { 1261 int i = 0; 1262 if (grp->gr_mem != NULL) { 1263 while (grp->gr_mem[i] != NULL) 1264 { 1265 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) 1266 { 1267 printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name); 1268 break; 1269 } 1270 ++i; 1271 } 1272 } 1273 } 1274 ENDGRENT(); 1275 printf("%s", j ? "\n" : ""); 1276 } 1277 return EXIT_SUCCESS; 1278} 1279 1280char * 1281pw_checkname(char *name, int gecos) 1282{ 1283 char showch[8]; 1284 const char *badchars, *ch, *showtype; 1285 int reject; 1286 1287 ch = name; 1288 reject = 0; 1289 if (gecos) { 1290 /* See if the name is valid as a gecos (comment) field. */ 1291 badchars = ":!@"; 1292 showtype = "gecos field"; 1293 } else { 1294 /* See if the name is valid as a userid or group. */ 1295 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\""; 1296 showtype = "userid/group name"; 1297 /* Userids and groups can not have a leading '-'. */ 1298 if (*ch == '-') 1299 reject = 1; 1300 } 1301 if (!reject) { 1302 while (*ch) { 1303 if (strchr(badchars, *ch) != NULL || *ch < ' ' || 1304 *ch == 127) { 1305 reject = 1; 1306 break; 1307 } 1308 /* 8-bit characters are only allowed in GECOS fields */ 1309 if (!gecos && (*ch & 0x80)) { 1310 reject = 1; 1311 break; 1312 } 1313 ch++; 1314 } 1315 } 1316 /* 1317 * A `$' is allowed as the final character for userids and groups, 1318 * mainly for the benefit of samba. 1319 */ 1320 if (reject && !gecos) { 1321 if (*ch == '$' && *(ch + 1) == '\0') { 1322 reject = 0; 1323 ch++; 1324 } 1325 } 1326 if (reject) { 1327 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127) 1328 ? "`%c'" : "0x%02x", *ch); 1329 errx(EX_DATAERR, "invalid character %s at position %td in %s", 1330 showch, (ch - name), showtype); 1331 } 1332 if (!gecos && (ch - name) > LOGNAMESIZE) 1333 errx(EX_DATAERR, "name too long `%s' (max is %d)", name, 1334 LOGNAMESIZE); 1335 1336 return (name); 1337} 1338 1339 1340static void 1341rmat(uid_t uid) 1342{ 1343 DIR *d = opendir("/var/at/jobs"); 1344 1345 if (d != NULL) { 1346 struct dirent *e; 1347 1348 while ((e = readdir(d)) != NULL) { 1349 struct stat st; 1350 1351 if (strncmp(e->d_name, ".lock", 5) != 0 && 1352 stat(e->d_name, &st) == 0 && 1353 !S_ISDIR(st.st_mode) && 1354 st.st_uid == uid) { 1355 char tmp[MAXPATHLEN]; 1356 1357 snprintf(tmp, sizeof(tmp), "/usr/bin/atrm %s", e->d_name); 1358 system(tmp); 1359 } 1360 } 1361 closedir(d); 1362 } 1363} 1364 1365static void 1366rmopie(char const * name) 1367{ 1368 static const char etcopie[] = "/etc/opiekeys"; 1369 FILE *fp = fopen(etcopie, "r+"); 1370 1371 if (fp != NULL) { 1372 char tmp[1024]; 1373 off_t atofs = 0; 1374 int length = strlen(name); 1375 1376 while (fgets(tmp, sizeof tmp, fp) != NULL) { 1377 if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') { 1378 if (fseek(fp, atofs, SEEK_SET) == 0) { 1379 fwrite("#", 1, 1, fp); /* Comment username out */ 1380 } 1381 break; 1382 } 1383 atofs = ftell(fp); 1384 } 1385 /* 1386 * If we got an error of any sort, don't update! 1387 */ 1388 fclose(fp); 1389 } 1390} 1391 1392