pw_user.c revision 285398
1/*- 2 * Copyright (C) 1996 3 * David L. Nugent. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28#ifndef lint 29static const char rcsid[] = 30 "$FreeBSD: head/usr.sbin/pw/pw_user.c 285398 2015-07-11 18:09:27Z bapt $"; 31#endif /* not lint */ 32 33#include <ctype.h> 34#include <err.h> 35#include <fcntl.h> 36#include <sys/param.h> 37#include <dirent.h> 38#include <paths.h> 39#include <termios.h> 40#include <sys/types.h> 41#include <sys/time.h> 42#include <sys/resource.h> 43#include <login_cap.h> 44#include <pwd.h> 45#include <grp.h> 46#include <libutil.h> 47#include "pw.h" 48#include "bitmap.h" 49 50#define LOGNAMESIZE (MAXLOGNAME-1) 51 52static char locked_str[] = "*LOCKED*"; 53 54static int delete_user(struct userconf *cnf, struct passwd *pwd, 55 char *name, int delete, int mode); 56static int print_user(struct passwd * pwd); 57static uid_t pw_uidpolicy(struct userconf * cnf, long id); 58static uid_t pw_gidpolicy(struct cargs * args, char *nam, gid_t prefer); 59static time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args); 60static time_t pw_exppolicy(struct userconf * cnf, struct cargs * args); 61static char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user); 62static char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell); 63static char *pw_password(struct userconf * cnf, struct cargs * args, char const * user); 64static char *shell_path(char const * path, char *shells[], char *sh); 65static void rmat(uid_t uid); 66static void rmopie(char const * name); 67 68static void 69create_and_populate_homedir(int mode, struct passwd *pwd) 70{ 71 char *homedir, *dotdir; 72 struct userconf *cnf = conf.userconf; 73 74 homedir = dotdir = NULL; 75 76 if (conf.rootdir[0] != '\0') { 77 asprintf(&homedir, "%s/%s", conf.rootdir, pwd->pw_dir); 78 if (homedir == NULL) 79 errx(EX_OSERR, "out of memory"); 80 asprintf(&dotdir, "%s/%s", conf.rootdir, cnf->dotdir); 81 } 82 83 copymkdir(homedir ? homedir : pwd->pw_dir, dotdir ? dotdir: cnf->dotdir, 84 cnf->homemode, pwd->pw_uid, pwd->pw_gid); 85 pw_log(cnf, mode, W_USER, "%s(%u) home %s made", pwd->pw_name, 86 pwd->pw_uid, pwd->pw_dir); 87} 88 89static int 90set_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 151int 152pw_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("%u:", next); 160 pw_groupnext(cnf, quiet); 161 162 return (EXIT_SUCCESS); 163} 164 165static int 166pw_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/*- 196 * -C config configuration file 197 * -q quiet operation 198 * -n name login name 199 * -u uid user id 200 * -c comment user name/comment 201 * -d directory home directory 202 * -e date account expiry date 203 * -p date password expiry date 204 * -g grp primary group 205 * -G grp1,grp2 additional groups 206 * -m [ -k dir ] create and set up home 207 * -s shell name of login shell 208 * -o duplicate uid ok 209 * -L class user class 210 * -l name new login name 211 * -h fd password filehandle 212 * -H fd encrypted password filehandle 213 * -F force print or add 214 * Setting defaults: 215 * -D set user defaults 216 * -b dir default home root dir 217 * -e period default expiry period 218 * -p period default password change period 219 * -g group default group 220 * -G grp1,grp2.. default additional groups 221 * -L class default login class 222 * -k dir default home skeleton 223 * -s shell default shell 224 * -w method default password method 225 */ 226 227int 228pw_user(int mode, char *name, long id, struct cargs * args) 229{ 230 int rc, edited = 0; 231 char *p = NULL; 232 char *passtmp; 233 struct carg *arg; 234 struct passwd *pwd = NULL; 235 struct group *grp; 236 struct stat st; 237 struct userconf *cnf; 238 char line[_PASSWORD_LEN+1]; 239 char path[MAXPATHLEN]; 240 FILE *fp; 241 char *dmode_c; 242 void *set = NULL; 243 244 static struct passwd fakeuser = 245 { 246 "nouser", 247 "*", 248 -1, 249 -1, 250 0, 251 "", 252 "User &", 253 "/nonexistent", 254 "/bin/sh", 255 0 256#if defined(__FreeBSD__) 257 ,0 258#endif 259 }; 260 261 cnf = conf.userconf; 262 263 if (mode == M_NEXT) 264 return (pw_usernext(cnf, conf.quiet)); 265 266 if (mode == M_PRINT) 267 return (pw_usershow(name, id, &fakeuser)); 268 269 /* 270 * We can do all of the common legwork here 271 */ 272 273 if ((arg = getarg(args, 'b')) != NULL) { 274 cnf->home = arg->val; 275 } 276 277 if ((arg = getarg(args, 'M')) != NULL) { 278 dmode_c = arg->val; 279 if ((set = setmode(dmode_c)) == NULL) 280 errx(EX_DATAERR, "invalid directory creation mode '%s'", 281 dmode_c); 282 cnf->homemode = getmode(set, _DEF_DIRMODE); 283 free(set); 284 } 285 286 /* 287 * If we'll need to use it or we're updating it, 288 * then create the base home directory if necessary 289 */ 290 if (arg != NULL || getarg(args, 'm') != NULL) { 291 int l = strlen(cnf->home); 292 293 if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */ 294 cnf->home[--l] = '\0'; 295 296 if (l < 2 || *cnf->home != '/') /* Check for absolute path name */ 297 errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home); 298 299 if (stat(cnf->home, &st) == -1) { 300 char dbuf[MAXPATHLEN]; 301 302 /* 303 * This is a kludge especially for Joerg :) 304 * If the home directory would be created in the root partition, then 305 * we really create it under /usr which is likely to have more space. 306 * But we create a symlink from cnf->home -> "/usr" -> cnf->home 307 */ 308 if (strchr(cnf->home+1, '/') == NULL) { 309 snprintf(dbuf, MAXPATHLEN, "/usr%s", cnf->home); 310 if (mkdir(dbuf, _DEF_DIRMODE) != -1 || errno == EEXIST) { 311 chown(dbuf, 0, 0); 312 /* 313 * Skip first "/" and create symlink: 314 * /home -> usr/home 315 */ 316 symlink(dbuf+1, cnf->home); 317 } 318 /* If this falls, fall back to old method */ 319 } 320 strlcpy(dbuf, cnf->home, sizeof(dbuf)); 321 p = dbuf; 322 if (stat(dbuf, &st) == -1) { 323 while ((p = strchr(p + 1, '/')) != NULL) { 324 *p = '\0'; 325 if (stat(dbuf, &st) == -1) { 326 if (mkdir(dbuf, _DEF_DIRMODE) == -1) 327 goto direrr; 328 chown(dbuf, 0, 0); 329 } else if (!S_ISDIR(st.st_mode)) 330 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf); 331 *p = '/'; 332 } 333 } 334 if (stat(dbuf, &st) == -1) { 335 if (mkdir(dbuf, _DEF_DIRMODE) == -1) { 336 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf); 337 } 338 chown(dbuf, 0, 0); 339 } 340 } else if (!S_ISDIR(st.st_mode)) 341 errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home); 342 } 343 344 if ((arg = getarg(args, 'e')) != NULL) 345 cnf->expire_days = atoi(arg->val); 346 347 if ((arg = getarg(args, 'y')) != NULL) 348 cnf->nispasswd = arg->val; 349 350 if ((arg = getarg(args, 'p')) != NULL && arg->val) 351 cnf->password_days = atoi(arg->val); 352 353 if ((arg = getarg(args, 'g')) != NULL) { 354 if (!*(p = arg->val)) /* Handle empty group list specially */ 355 cnf->default_group = ""; 356 else { 357 if ((grp = GETGRNAM(p)) == NULL) { 358 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 359 errx(EX_NOUSER, "group `%s' does not exist", p); 360 } 361 cnf->default_group = newstr(grp->gr_name); 362 } 363 } 364 if ((arg = getarg(args, 'L')) != NULL) 365 cnf->default_class = pw_checkname(arg->val, 0); 366 367 if ((arg = getarg(args, 'G')) != NULL && arg->val) { 368 int i = 0; 369 370 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) { 371 if ((grp = GETGRNAM(p)) == NULL) { 372 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 373 errx(EX_NOUSER, "group `%s' does not exist", p); 374 } 375 if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1) 376 cnf->groups[i++] = newstr(grp->gr_name); 377 } 378 while (i < cnf->numgroups) 379 cnf->groups[i++] = NULL; 380 } 381 382 if ((arg = getarg(args, 'k')) != NULL) { 383 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode)) 384 errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir); 385 } 386 387 if ((arg = getarg(args, 's')) != NULL) 388 cnf->shell_default = arg->val; 389 390 if ((arg = getarg(args, 'w')) != NULL) 391 cnf->default_password = boolean_val(arg->val, cnf->default_password); 392 if (mode == M_ADD && getarg(args, 'D')) { 393 if (name != NULL) 394 errx(EX_DATAERR, "can't combine `-D' with `-n name'"); 395 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 396 if ((cnf->min_uid = (uid_t) atoi(p)) == 0) 397 cnf->min_uid = 1000; 398 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid) 399 cnf->max_uid = 32000; 400 } 401 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 402 if ((cnf->min_gid = (gid_t) atoi(p)) == 0) 403 cnf->min_gid = 1000; 404 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid) 405 cnf->max_gid = 32000; 406 } 407 408 if (write_userconfig(conf.config)) 409 return (EXIT_SUCCESS); 410 err(EX_IOERR, "config udpate"); 411 } 412 413 if (name != NULL) 414 pwd = GETPWNAM(pw_checkname(name, 0)); 415 416 if (id < 0 && name == NULL) 417 errx(EX_DATAERR, "user name or id required"); 418 419 /* 420 * Update, delete & print require that the user exists 421 */ 422 if (mode == M_UPDATE || mode == M_DELETE || 423 mode == M_LOCK || mode == M_UNLOCK) { 424 425 if (name == NULL && pwd == NULL) /* Try harder */ 426 pwd = GETPWUID(id); 427 428 if (pwd == NULL) { 429 if (name == NULL) 430 errx(EX_NOUSER, "no such uid `%ld'", id); 431 errx(EX_NOUSER, "no such user `%s'", name); 432 } 433 434 if (name == NULL) 435 name = pwd->pw_name; 436 437 /* 438 * The M_LOCK and M_UNLOCK functions simply add or remove 439 * a "*LOCKED*" prefix from in front of the password to 440 * prevent it decoding correctly, and therefore prevents 441 * access. Of course, this only prevents access via 442 * password authentication (not ssh, kerberos or any 443 * other method that does not use the UNIX password) but 444 * that is a known limitation. 445 */ 446 447 if (mode == M_LOCK) { 448 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0) 449 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name); 450 asprintf(&passtmp, "%s%s", locked_str, pwd->pw_passwd); 451 if (passtmp == NULL) /* disaster */ 452 errx(EX_UNAVAILABLE, "out of memory"); 453 pwd->pw_passwd = passtmp; 454 edited = 1; 455 } else if (mode == M_UNLOCK) { 456 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0) 457 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name); 458 pwd->pw_passwd += sizeof(locked_str)-1; 459 edited = 1; 460 } else if (mode == M_DELETE) 461 return (delete_user(cnf, pwd, name, 462 getarg(args, 'r') != NULL, mode)); 463 464 /* 465 * The rest is edit code 466 */ 467 if (conf.newname != NULL) { 468 if (strcmp(pwd->pw_name, "root") == 0) 469 errx(EX_DATAERR, "can't rename `root' account"); 470 pwd->pw_name = pw_checkname(conf.newname, 0); 471 edited = 1; 472 } 473 474 if (id > 0 && isdigit((unsigned char)*arg->val)) { 475 pwd->pw_uid = (uid_t)id; 476 edited = 1; 477 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0) 478 errx(EX_DATAERR, "can't change uid of `root' account"); 479 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 480 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name); 481 } 482 483 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) { /* Already checked this */ 484 gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid; 485 if (newgid != pwd->pw_gid) { 486 edited = 1; 487 pwd->pw_gid = newgid; 488 } 489 } 490 491 if ((arg = getarg(args, 'p')) != NULL) { 492 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 493 if (pwd->pw_change != 0) { 494 pwd->pw_change = 0; 495 edited = 1; 496 } 497 } 498 else { 499 time_t now = time(NULL); 500 time_t expire = parse_date(now, arg->val); 501 502 if (pwd->pw_change != expire) { 503 pwd->pw_change = expire; 504 edited = 1; 505 } 506 } 507 } 508 509 if ((arg = getarg(args, 'e')) != NULL) { 510 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 511 if (pwd->pw_expire != 0) { 512 pwd->pw_expire = 0; 513 edited = 1; 514 } 515 } 516 else { 517 time_t now = time(NULL); 518 time_t expire = parse_date(now, arg->val); 519 520 if (pwd->pw_expire != expire) { 521 pwd->pw_expire = expire; 522 edited = 1; 523 } 524 } 525 } 526 527 if ((arg = getarg(args, 's')) != NULL) { 528 char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val); 529 if (shell == NULL) 530 shell = ""; 531 if (strcmp(shell, pwd->pw_shell) != 0) { 532 pwd->pw_shell = shell; 533 edited = 1; 534 } 535 } 536 537 if (getarg(args, 'L')) { 538 if (cnf->default_class == NULL) 539 cnf->default_class = ""; 540 if (strcmp(pwd->pw_class, cnf->default_class) != 0) { 541 pwd->pw_class = cnf->default_class; 542 edited = 1; 543 } 544 } 545 546 if ((arg = getarg(args, 'd')) != NULL) { 547 if (strcmp(pwd->pw_dir, arg->val)) 548 edited = 1; 549 if (stat(pwd->pw_dir = arg->val, &st) == -1) { 550 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0) 551 warnx("WARNING: home `%s' does not exist", pwd->pw_dir); 552 } else if (!S_ISDIR(st.st_mode)) 553 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir); 554 } 555 556 if ((arg = getarg(args, 'w')) != NULL && conf.fd == -1) { 557 login_cap_t *lc; 558 559 lc = login_getpwclass(pwd); 560 if (lc == NULL || 561 login_setcryptfmt(lc, "sha512", NULL) == NULL) 562 warn("setting crypt(3) format"); 563 login_close(lc); 564 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 565 edited = 1; 566 } 567 568 } else { 569 login_cap_t *lc; 570 571 /* 572 * Add code 573 */ 574 575 if (name == NULL) /* Required */ 576 errx(EX_DATAERR, "login name required"); 577 else if ((pwd = GETPWNAM(name)) != NULL) /* Exists */ 578 errx(EX_DATAERR, "login name `%s' already exists", name); 579 580 /* 581 * Now, set up defaults for a new user 582 */ 583 pwd = &fakeuser; 584 pwd->pw_name = name; 585 pwd->pw_class = cnf->default_class ? cnf->default_class : ""; 586 pwd->pw_uid = pw_uidpolicy(cnf, id); 587 pwd->pw_gid = pw_gidpolicy(args, pwd->pw_name, (gid_t) pwd->pw_uid); 588 pwd->pw_change = pw_pwdpolicy(cnf, args); 589 pwd->pw_expire = pw_exppolicy(cnf, args); 590 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name); 591 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL); 592 lc = login_getpwclass(pwd); 593 if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL) 594 warn("setting crypt(3) format"); 595 login_close(lc); 596 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 597 edited = 1; 598 599 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 600 warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name); 601 } 602 603 /* 604 * Shared add/edit code 605 */ 606 if ((arg = getarg(args, 'c')) != NULL) { 607 char *gecos = pw_checkname(arg->val, 1); 608 if (strcmp(pwd->pw_gecos, gecos) != 0) { 609 pwd->pw_gecos = gecos; 610 edited = 1; 611 } 612 } 613 614 if (conf.fd != -1) 615 edited = set_passwd(pwd, mode == M_UPDATE); 616 617 /* 618 * Special case: -N only displays & exits 619 */ 620 if (conf.dryrun) 621 return print_user(pwd); 622 623 if (mode == M_ADD) { 624 edited = 1; /* Always */ 625 rc = addpwent(pwd); 626 if (rc == -1) 627 errx(EX_IOERR, "user '%s' already exists", 628 pwd->pw_name); 629 else if (rc != 0) 630 err(EX_IOERR, "passwd file update"); 631 if (cnf->nispasswd && *cnf->nispasswd=='/') { 632 rc = addnispwent(cnf->nispasswd, pwd); 633 if (rc == -1) 634 warnx("User '%s' already exists in NIS passwd", pwd->pw_name); 635 else 636 warn("NIS passwd update"); 637 /* NOTE: we treat NIS-only update errors as non-fatal */ 638 } 639 } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) { 640 if (edited) { /* Only updated this if required */ 641 rc = chgpwent(name, pwd); 642 if (rc == -1) 643 errx(EX_IOERR, "user '%s' does not exist (NIS?)", pwd->pw_name); 644 else if (rc != 0) 645 err(EX_IOERR, "passwd file update"); 646 if ( cnf->nispasswd && *cnf->nispasswd=='/') { 647 rc = chgnispwent(cnf->nispasswd, name, pwd); 648 if (rc == -1) 649 warn("User '%s' not found in NIS passwd", pwd->pw_name); 650 else 651 warn("NIS passwd update"); 652 /* NOTE: NIS-only update errors are not fatal */ 653 } 654 } 655 } 656 657 /* 658 * Ok, user is created or changed - now edit group file 659 */ 660 661 if (mode == M_ADD || getarg(args, 'G') != NULL) { 662 int i, j; 663 /* First remove the user from all group */ 664 SETGRENT(); 665 while ((grp = GETGRENT()) != NULL) { 666 char group[MAXLOGNAME]; 667 if (grp->gr_mem == NULL) 668 continue; 669 for (i = 0; grp->gr_mem[i] != NULL; i++) { 670 if (strcmp(grp->gr_mem[i] , pwd->pw_name) != 0) 671 continue; 672 for (j = i; grp->gr_mem[j] != NULL ; j++) 673 grp->gr_mem[j] = grp->gr_mem[j+1]; 674 strlcpy(group, grp->gr_name, MAXLOGNAME); 675 chggrent(group, grp); 676 } 677 } 678 ENDGRENT(); 679 680 /* now add to group where needed */ 681 for (i = 0; cnf->groups[i] != NULL; i++) { 682 grp = GETGRNAM(cnf->groups[i]); 683 grp = gr_add(grp, pwd->pw_name); 684 /* 685 * grp can only be NULL in 2 cases: 686 * - the new member is already a member 687 * - a problem with memory occurs 688 * in both cases we want to skip now. 689 */ 690 if (grp == NULL) 691 continue; 692 chggrent(cnf->groups[i], grp); 693 free(grp); 694 } 695 } 696 697 698 /* go get a current version of pwd */ 699 pwd = GETPWNAM(name); 700 if (pwd == NULL) { 701 /* This will fail when we rename, so special case that */ 702 if (mode == M_UPDATE && conf.newname != NULL) { 703 name = conf.newname; /* update new name */ 704 pwd = GETPWNAM(name); /* refetch renamed rec */ 705 } 706 } 707 if (pwd == NULL) /* can't go on without this */ 708 errx(EX_NOUSER, "user '%s' disappeared during update", name); 709 710 grp = GETGRGID(pwd->pw_gid); 711 pw_log(cnf, mode, W_USER, "%s(%u):%s(%u):%s:%s:%s", 712 pwd->pw_name, pwd->pw_uid, 713 grp ? grp->gr_name : "unknown", (grp ? grp->gr_gid : (uid_t)-1), 714 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 715 716 /* 717 * If adding, let's touch and chown the user's mail file. This is not 718 * strictly necessary under BSD with a 0755 maildir but it also 719 * doesn't hurt anything to create the empty mailfile 720 */ 721 if (mode == M_ADD) { 722 if (PWALTDIR() != PWF_ALT) { 723 arg = getarg(args, 'R'); 724 snprintf(path, sizeof(path), "%s%s/%s", 725 arg ? arg->val : "", _PATH_MAILDIR, pwd->pw_name); 726 close(open(path, O_RDWR | O_CREAT, 0600)); /* Preserve contents & 727 * mtime */ 728 chown(path, pwd->pw_uid, pwd->pw_gid); 729 } 730 } 731 732 /* 733 * Let's create and populate the user's home directory. Note 734 * that this also `works' for editing users if -m is used, but 735 * existing files will *not* be overwritten. 736 */ 737 if (PWALTDIR() != PWF_ALT && getarg(args, 'm') != NULL && pwd->pw_dir && 738 *pwd->pw_dir == '/' && pwd->pw_dir[1]) 739 create_and_populate_homedir(mode, pwd); 740 741 /* 742 * Finally, send mail to the new user as well, if we are asked to 743 */ 744 if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) { 745 FILE *pfp = popen(_PATH_SENDMAIL " -t", "w"); 746 747 if (pfp == NULL) 748 warn("sendmail"); 749 else { 750 fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name); 751 while (fgets(line, sizeof(line), fp) != NULL) { 752 /* Do substitutions? */ 753 fputs(line, pfp); 754 } 755 pclose(pfp); 756 pw_log(cnf, mode, W_USER, "%s(%u) new user mail sent", 757 pwd->pw_name, pwd->pw_uid); 758 } 759 fclose(fp); 760 } 761 762 return EXIT_SUCCESS; 763} 764 765 766static uid_t 767pw_uidpolicy(struct userconf * cnf, long id) 768{ 769 struct passwd *pwd; 770 uid_t uid = (uid_t) - 1; 771 772 /* 773 * Check the given uid, if any 774 */ 775 if (id > 0) { 776 uid = (uid_t) id; 777 778 if ((pwd = GETPWUID(uid)) != NULL && conf.checkduplicate) 779 errx(EX_DATAERR, "uid `%u' has already been allocated", pwd->pw_uid); 780 } else { 781 struct bitmap bm; 782 783 /* 784 * We need to allocate the next available uid under one of 785 * two policies a) Grab the first unused uid b) Grab the 786 * highest possible unused uid 787 */ 788 if (cnf->min_uid >= cnf->max_uid) { /* Sanity 789 * claus^H^H^H^Hheck */ 790 cnf->min_uid = 1000; 791 cnf->max_uid = 32000; 792 } 793 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1); 794 795 /* 796 * Now, let's fill the bitmap from the password file 797 */ 798 SETPWENT(); 799 while ((pwd = GETPWENT()) != NULL) 800 if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid) 801 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid); 802 ENDPWENT(); 803 804 /* 805 * Then apply the policy, with fallback to reuse if necessary 806 */ 807 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid) 808 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid); 809 810 /* 811 * Another sanity check 812 */ 813 if (uid < cnf->min_uid || uid > cnf->max_uid) 814 errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used"); 815 bm_dealloc(&bm); 816 } 817 return uid; 818} 819 820 821static uid_t 822pw_gidpolicy(struct cargs * args, char *nam, gid_t prefer) 823{ 824 struct group *grp; 825 gid_t gid = (uid_t) - 1; 826 struct carg *a_gid = getarg(args, 'g'); 827 struct userconf *cnf = conf.userconf; 828 829 /* 830 * If no arg given, see if default can help out 831 */ 832 if (a_gid == NULL && cnf->default_group && *cnf->default_group) 833 a_gid = addarg(args, 'g', cnf->default_group); 834 835 /* 836 * Check the given gid, if any 837 */ 838 SETGRENT(); 839 if (a_gid != NULL) { 840 if ((grp = GETGRNAM(a_gid->val)) == NULL) { 841 gid = (gid_t) atol(a_gid->val); 842 if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL) 843 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val); 844 } 845 gid = grp->gr_gid; 846 } else if ((grp = GETGRNAM(nam)) != NULL && 847 (grp->gr_mem == NULL || grp->gr_mem[0] == NULL)) { 848 gid = grp->gr_gid; /* Already created? Use it anyway... */ 849 } else { 850 struct cargs grpargs; 851 char tmp[32]; 852 853 LIST_INIT(&grpargs); 854 855 /* 856 * We need to auto-create a group with the user's name. We 857 * can send all the appropriate output to our sister routine 858 * bit first see if we can create a group with gid==uid so we 859 * can keep the user and group ids in sync. We purposely do 860 * NOT check the gid range if we can force the sync. If the 861 * user's name dups an existing group, then the group add 862 * function will happily handle that case for us and exit. 863 */ 864 if (GETGRGID(prefer) == NULL) { 865 snprintf(tmp, sizeof(tmp), "%u", prefer); 866 addarg(&grpargs, 'g', tmp); 867 } 868 if (conf.dryrun) { 869 gid = pw_groupnext(cnf, true); 870 } else { 871 pw_group(M_ADD, nam, -1, &grpargs); 872 if ((grp = GETGRNAM(nam)) != NULL) 873 gid = grp->gr_gid; 874 } 875 a_gid = LIST_FIRST(&grpargs); 876 while (a_gid != NULL) { 877 struct carg *t = LIST_NEXT(a_gid, list); 878 LIST_REMOVE(a_gid, list); 879 a_gid = t; 880 } 881 } 882 ENDGRENT(); 883 return gid; 884} 885 886 887static time_t 888pw_pwdpolicy(struct userconf * cnf, struct cargs * args) 889{ 890 time_t result = 0; 891 time_t now = time(NULL); 892 struct carg *arg = getarg(args, 'p'); 893 894 if (arg != NULL) { 895 if ((result = parse_date(now, arg->val)) == now) 896 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 897 } else if (cnf->password_days > 0) 898 result = now + ((long) cnf->password_days * 86400L); 899 return result; 900} 901 902 903static time_t 904pw_exppolicy(struct userconf * cnf, struct cargs * args) 905{ 906 time_t result = 0; 907 time_t now = time(NULL); 908 struct carg *arg = getarg(args, 'e'); 909 910 if (arg != NULL) { 911 if ((result = parse_date(now, arg->val)) == now) 912 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 913 } else if (cnf->expire_days > 0) 914 result = now + ((long) cnf->expire_days * 86400L); 915 return result; 916} 917 918 919static char * 920pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user) 921{ 922 struct carg *arg = getarg(args, 'd'); 923 static char home[128]; 924 925 if (arg) 926 return (arg->val); 927 928 if (cnf->home == NULL || *cnf->home == '\0') 929 errx(EX_CONFIG, "no base home directory set"); 930 snprintf(home, sizeof(home), "%s/%s", cnf->home, user); 931 932 return (home); 933} 934 935static char * 936shell_path(char const * path, char *shells[], char *sh) 937{ 938 if (sh != NULL && (*sh == '/' || *sh == '\0')) 939 return sh; /* specified full path or forced none */ 940 else { 941 char *p; 942 char paths[_UC_MAXLINE]; 943 944 /* 945 * We need to search paths 946 */ 947 strlcpy(paths, path, sizeof(paths)); 948 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) { 949 int i; 950 static char shellpath[256]; 951 952 if (sh != NULL) { 953 snprintf(shellpath, sizeof(shellpath), "%s/%s", p, sh); 954 if (access(shellpath, X_OK) == 0) 955 return shellpath; 956 } else 957 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) { 958 snprintf(shellpath, sizeof(shellpath), "%s/%s", p, shells[i]); 959 if (access(shellpath, X_OK) == 0) 960 return shellpath; 961 } 962 } 963 if (sh == NULL) 964 errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh); 965 errx(EX_CONFIG, "no default shell available or defined"); 966 return NULL; 967 } 968} 969 970 971static char * 972pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell) 973{ 974 char *sh = newshell; 975 struct carg *arg = getarg(args, 's'); 976 977 if (newshell == NULL && arg != NULL) 978 sh = arg->val; 979 return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default); 980} 981 982#define SALTSIZE 32 983 984static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./"; 985 986char * 987pw_pwcrypt(char *password) 988{ 989 int i; 990 char salt[SALTSIZE + 1]; 991 char *cryptpw; 992 993 static char buf[256]; 994 995 /* 996 * Calculate a salt value 997 */ 998 for (i = 0; i < SALTSIZE; i++) 999 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)]; 1000 salt[SALTSIZE] = '\0'; 1001 1002 cryptpw = crypt(password, salt); 1003 if (cryptpw == NULL) 1004 errx(EX_CONFIG, "crypt(3) failure"); 1005 return strcpy(buf, cryptpw); 1006} 1007 1008 1009static char * 1010pw_password(struct userconf * cnf, struct cargs * args, char const * user) 1011{ 1012 int i, l; 1013 char pwbuf[32]; 1014 1015 switch (cnf->default_password) { 1016 case -1: /* Random password */ 1017 l = (arc4random() % 8 + 8); /* 8 - 16 chars */ 1018 for (i = 0; i < l; i++) 1019 pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)]; 1020 pwbuf[i] = '\0'; 1021 1022 /* 1023 * We give this information back to the user 1024 */ 1025 if (conf.fd == -1 && !conf.dryrun) { 1026 if (isatty(STDOUT_FILENO)) 1027 printf("Password for '%s' is: ", user); 1028 printf("%s\n", pwbuf); 1029 fflush(stdout); 1030 } 1031 break; 1032 1033 case -2: /* No password at all! */ 1034 return ""; 1035 1036 case 0: /* No login - default */ 1037 default: 1038 return "*"; 1039 1040 case 1: /* user's name */ 1041 strlcpy(pwbuf, user, sizeof(pwbuf)); 1042 break; 1043 } 1044 return pw_pwcrypt(pwbuf); 1045} 1046 1047static int 1048delete_user(struct userconf *cnf, struct passwd *pwd, char *name, 1049 int delete, int mode) 1050{ 1051 char file[MAXPATHLEN]; 1052 char home[MAXPATHLEN]; 1053 uid_t uid = pwd->pw_uid; 1054 struct group *gr, *grp; 1055 char grname[LOGNAMESIZE]; 1056 int rc; 1057 struct stat st; 1058 1059 if (strcmp(pwd->pw_name, "root") == 0) 1060 errx(EX_DATAERR, "cannot remove user 'root'"); 1061 1062 if (!PWALTDIR()) { 1063 /* 1064 * Remove opie record from /etc/opiekeys 1065 */ 1066 1067 rmopie(pwd->pw_name); 1068 1069 /* 1070 * Remove crontabs 1071 */ 1072 snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name); 1073 if (access(file, F_OK) == 0) { 1074 snprintf(file, sizeof(file), "crontab -u %s -r", pwd->pw_name); 1075 system(file); 1076 } 1077 } 1078 /* 1079 * Save these for later, since contents of pwd may be 1080 * invalidated by deletion 1081 */ 1082 snprintf(file, sizeof(file), "%s/%s", _PATH_MAILDIR, pwd->pw_name); 1083 strlcpy(home, pwd->pw_dir, sizeof(home)); 1084 gr = GETGRGID(pwd->pw_gid); 1085 if (gr != NULL) 1086 strlcpy(grname, gr->gr_name, LOGNAMESIZE); 1087 else 1088 grname[0] = '\0'; 1089 1090 rc = delpwent(pwd); 1091 if (rc == -1) 1092 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name); 1093 else if (rc != 0) 1094 err(EX_IOERR, "passwd update"); 1095 1096 if (cnf->nispasswd && *cnf->nispasswd=='/') { 1097 rc = delnispwent(cnf->nispasswd, name); 1098 if (rc == -1) 1099 warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name); 1100 else if (rc != 0) 1101 warn("WARNING: NIS passwd update"); 1102 /* non-fatal */ 1103 } 1104 1105 grp = GETGRNAM(name); 1106 if (grp != NULL && 1107 (grp->gr_mem == NULL || *grp->gr_mem == NULL) && 1108 strcmp(name, grname) == 0) 1109 delgrent(GETGRNAM(name)); 1110 SETGRENT(); 1111 while ((grp = GETGRENT()) != NULL) { 1112 int i, j; 1113 char group[MAXLOGNAME]; 1114 if (grp->gr_mem == NULL) 1115 continue; 1116 1117 for (i = 0; grp->gr_mem[i] != NULL; i++) { 1118 if (strcmp(grp->gr_mem[i], name) != 0) 1119 continue; 1120 1121 for (j = i; grp->gr_mem[j] != NULL; j++) 1122 grp->gr_mem[j] = grp->gr_mem[j+1]; 1123 strlcpy(group, grp->gr_name, MAXLOGNAME); 1124 chggrent(group, grp); 1125 } 1126 } 1127 ENDGRENT(); 1128 1129 pw_log(cnf, mode, W_USER, "%s(%u) account removed", name, uid); 1130 1131 if (!PWALTDIR()) { 1132 /* 1133 * Remove mail file 1134 */ 1135 remove(file); 1136 1137 /* 1138 * Remove at jobs 1139 */ 1140 if (getpwuid(uid) == NULL) 1141 rmat(uid); 1142 1143 /* 1144 * Remove home directory and contents 1145 */ 1146 if (delete && *home == '/' && getpwuid(uid) == NULL && 1147 stat(home, &st) != -1) { 1148 rm_r(home, uid); 1149 pw_log(cnf, mode, W_USER, "%s(%u) home '%s' %sremoved", 1150 name, uid, home, 1151 stat(home, &st) == -1 ? "" : "not completely "); 1152 } 1153 } 1154 1155 return (EXIT_SUCCESS); 1156} 1157 1158static int 1159print_user(struct passwd * pwd) 1160{ 1161 if (!conf.pretty) { 1162 char *buf; 1163 1164 buf = conf.v7 ? pw_make_v7(pwd) : pw_make(pwd); 1165 printf("%s\n", buf); 1166 free(buf); 1167 } else { 1168 int j; 1169 char *p; 1170 struct group *grp = GETGRGID(pwd->pw_gid); 1171 char uname[60] = "User &", office[60] = "[None]", 1172 wphone[60] = "[None]", hphone[60] = "[None]"; 1173 char acexpire[32] = "[None]", pwexpire[32] = "[None]"; 1174 struct tm * tptr; 1175 1176 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) { 1177 strlcpy(uname, p, sizeof(uname)); 1178 if ((p = strtok(NULL, ",")) != NULL) { 1179 strlcpy(office, p, sizeof(office)); 1180 if ((p = strtok(NULL, ",")) != NULL) { 1181 strlcpy(wphone, p, sizeof(wphone)); 1182 if ((p = strtok(NULL, "")) != NULL) { 1183 strlcpy(hphone, p, 1184 sizeof(hphone)); 1185 } 1186 } 1187 } 1188 } 1189 /* 1190 * Handle '&' in gecos field 1191 */ 1192 if ((p = strchr(uname, '&')) != NULL) { 1193 int l = strlen(pwd->pw_name); 1194 int m = strlen(p); 1195 1196 memmove(p + l, p + 1, m); 1197 memmove(p, pwd->pw_name, l); 1198 *p = (char) toupper((unsigned char)*p); 1199 } 1200 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL) 1201 strftime(acexpire, sizeof acexpire, "%c", tptr); 1202 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL) 1203 strftime(pwexpire, sizeof pwexpire, "%c", tptr); 1204 printf("Login Name: %-15s #%-12u Group: %-15s #%u\n" 1205 " Full Name: %s\n" 1206 " Home: %-26.26s Class: %s\n" 1207 " Shell: %-26.26s Office: %s\n" 1208 "Work Phone: %-26.26s Home Phone: %s\n" 1209 "Acc Expire: %-26.26s Pwd Expire: %s\n", 1210 pwd->pw_name, pwd->pw_uid, 1211 grp ? grp->gr_name : "(invalid)", pwd->pw_gid, 1212 uname, pwd->pw_dir, pwd->pw_class, 1213 pwd->pw_shell, office, wphone, hphone, 1214 acexpire, pwexpire); 1215 SETGRENT(); 1216 j = 0; 1217 while ((grp=GETGRENT()) != NULL) 1218 { 1219 int i = 0; 1220 if (grp->gr_mem != NULL) { 1221 while (grp->gr_mem[i] != NULL) 1222 { 1223 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) 1224 { 1225 printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name); 1226 break; 1227 } 1228 ++i; 1229 } 1230 } 1231 } 1232 ENDGRENT(); 1233 printf("%s", j ? "\n" : ""); 1234 } 1235 return EXIT_SUCCESS; 1236} 1237 1238char * 1239pw_checkname(char *name, int gecos) 1240{ 1241 char showch[8]; 1242 const char *badchars, *ch, *showtype; 1243 int reject; 1244 1245 ch = name; 1246 reject = 0; 1247 if (gecos) { 1248 /* See if the name is valid as a gecos (comment) field. */ 1249 badchars = ":!@"; 1250 showtype = "gecos field"; 1251 } else { 1252 /* See if the name is valid as a userid or group. */ 1253 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\""; 1254 showtype = "userid/group name"; 1255 /* Userids and groups can not have a leading '-'. */ 1256 if (*ch == '-') 1257 reject = 1; 1258 } 1259 if (!reject) { 1260 while (*ch) { 1261 if (strchr(badchars, *ch) != NULL || *ch < ' ' || 1262 *ch == 127) { 1263 reject = 1; 1264 break; 1265 } 1266 /* 8-bit characters are only allowed in GECOS fields */ 1267 if (!gecos && (*ch & 0x80)) { 1268 reject = 1; 1269 break; 1270 } 1271 ch++; 1272 } 1273 } 1274 /* 1275 * A `$' is allowed as the final character for userids and groups, 1276 * mainly for the benefit of samba. 1277 */ 1278 if (reject && !gecos) { 1279 if (*ch == '$' && *(ch + 1) == '\0') { 1280 reject = 0; 1281 ch++; 1282 } 1283 } 1284 if (reject) { 1285 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127) 1286 ? "`%c'" : "0x%02x", *ch); 1287 errx(EX_DATAERR, "invalid character %s at position %td in %s", 1288 showch, (ch - name), showtype); 1289 } 1290 if (!gecos && (ch - name) > LOGNAMESIZE) 1291 errx(EX_DATAERR, "name too long `%s' (max is %d)", name, 1292 LOGNAMESIZE); 1293 1294 return (name); 1295} 1296 1297 1298static void 1299rmat(uid_t uid) 1300{ 1301 DIR *d = opendir("/var/at/jobs"); 1302 1303 if (d != NULL) { 1304 struct dirent *e; 1305 1306 while ((e = readdir(d)) != NULL) { 1307 struct stat st; 1308 1309 if (strncmp(e->d_name, ".lock", 5) != 0 && 1310 stat(e->d_name, &st) == 0 && 1311 !S_ISDIR(st.st_mode) && 1312 st.st_uid == uid) { 1313 char tmp[MAXPATHLEN]; 1314 1315 snprintf(tmp, sizeof(tmp), "/usr/bin/atrm %s", e->d_name); 1316 system(tmp); 1317 } 1318 } 1319 closedir(d); 1320 } 1321} 1322 1323static void 1324rmopie(char const * name) 1325{ 1326 static const char etcopie[] = "/etc/opiekeys"; 1327 FILE *fp = fopen(etcopie, "r+"); 1328 1329 if (fp != NULL) { 1330 char tmp[1024]; 1331 off_t atofs = 0; 1332 int length = strlen(name); 1333 1334 while (fgets(tmp, sizeof tmp, fp) != NULL) { 1335 if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') { 1336 if (fseek(fp, atofs, SEEK_SET) == 0) { 1337 fwrite("#", 1, 1, fp); /* Comment username out */ 1338 } 1339 break; 1340 } 1341 atofs = ftell(fp); 1342 } 1343 /* 1344 * If we got an error of any sort, don't update! 1345 */ 1346 fclose(fp); 1347 } 1348} 1349 1350