pw_user.c revision 284128
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 284128 2015-06-07 19:03:41Z 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, struct cargs * args); 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 89/*- 90 * -C config configuration file 91 * -q quiet operation 92 * -n name login name 93 * -u uid user id 94 * -c comment user name/comment 95 * -d directory home directory 96 * -e date account expiry date 97 * -p date password expiry date 98 * -g grp primary group 99 * -G grp1,grp2 additional groups 100 * -m [ -k dir ] create and set up home 101 * -s shell name of login shell 102 * -o duplicate uid ok 103 * -L class user class 104 * -l name new login name 105 * -h fd password filehandle 106 * -H fd encrypted password filehandle 107 * -F force print or add 108 * Setting defaults: 109 * -D set user defaults 110 * -b dir default home root dir 111 * -e period default expiry period 112 * -p period default password change period 113 * -g group default group 114 * -G grp1,grp2.. default additional groups 115 * -L class default login class 116 * -k dir default home skeleton 117 * -s shell default shell 118 * -w method default password method 119 */ 120 121int 122pw_user(int mode, char *name, long id, struct cargs * args) 123{ 124 int rc, edited = 0; 125 char *p = NULL; 126 char *passtmp; 127 struct carg *arg; 128 struct passwd *pwd = NULL; 129 struct group *grp; 130 struct stat st; 131 struct userconf *cnf; 132 char line[_PASSWORD_LEN+1]; 133 char path[MAXPATHLEN]; 134 FILE *fp; 135 char *dmode_c; 136 void *set = NULL; 137 138 static struct passwd fakeuser = 139 { 140 NULL, 141 "*", 142 -1, 143 -1, 144 0, 145 "", 146 "User &", 147 "/nonexistent", 148 "/bin/sh", 149 0 150#if defined(__FreeBSD__) 151 ,0 152#endif 153 }; 154 155 cnf = conf.userconf; 156 157 /* 158 * With M_NEXT, we only need to return the 159 * next uid to stdout 160 */ 161 if (mode == M_NEXT) 162 { 163 uid_t next = pw_uidpolicy(cnf, args); 164 if (getarg(args, 'q')) 165 return next; 166 printf("%u:", next); 167 pw_group(mode, name, -1, args); 168 return EXIT_SUCCESS; 169 } 170 171 /* 172 * We can do all of the common legwork here 173 */ 174 175 if ((arg = getarg(args, 'b')) != NULL) { 176 cnf->home = arg->val; 177 } 178 179 if ((arg = getarg(args, 'M')) != NULL) { 180 dmode_c = arg->val; 181 if ((set = setmode(dmode_c)) == NULL) 182 errx(EX_DATAERR, "invalid directory creation mode '%s'", 183 dmode_c); 184 cnf->homemode = getmode(set, _DEF_DIRMODE); 185 free(set); 186 } 187 188 /* 189 * If we'll need to use it or we're updating it, 190 * then create the base home directory if necessary 191 */ 192 if (arg != NULL || getarg(args, 'm') != NULL) { 193 int l = strlen(cnf->home); 194 195 if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */ 196 cnf->home[--l] = '\0'; 197 198 if (l < 2 || *cnf->home != '/') /* Check for absolute path name */ 199 errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home); 200 201 if (stat(cnf->home, &st) == -1) { 202 char dbuf[MAXPATHLEN]; 203 204 /* 205 * This is a kludge especially for Joerg :) 206 * If the home directory would be created in the root partition, then 207 * we really create it under /usr which is likely to have more space. 208 * But we create a symlink from cnf->home -> "/usr" -> cnf->home 209 */ 210 if (strchr(cnf->home+1, '/') == NULL) { 211 snprintf(dbuf, MAXPATHLEN, "/usr%s", cnf->home); 212 if (mkdir(dbuf, _DEF_DIRMODE) != -1 || errno == EEXIST) { 213 chown(dbuf, 0, 0); 214 /* 215 * Skip first "/" and create symlink: 216 * /home -> usr/home 217 */ 218 symlink(dbuf+1, cnf->home); 219 } 220 /* If this falls, fall back to old method */ 221 } 222 strlcpy(dbuf, cnf->home, sizeof(dbuf)); 223 p = dbuf; 224 if (stat(dbuf, &st) == -1) { 225 while ((p = strchr(p + 1, '/')) != NULL) { 226 *p = '\0'; 227 if (stat(dbuf, &st) == -1) { 228 if (mkdir(dbuf, _DEF_DIRMODE) == -1) 229 goto direrr; 230 chown(dbuf, 0, 0); 231 } else if (!S_ISDIR(st.st_mode)) 232 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf); 233 *p = '/'; 234 } 235 } 236 if (stat(dbuf, &st) == -1) { 237 if (mkdir(dbuf, _DEF_DIRMODE) == -1) { 238 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf); 239 } 240 chown(dbuf, 0, 0); 241 } 242 } else if (!S_ISDIR(st.st_mode)) 243 errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home); 244 } 245 246 if ((arg = getarg(args, 'e')) != NULL) 247 cnf->expire_days = atoi(arg->val); 248 249 if ((arg = getarg(args, 'y')) != NULL) 250 cnf->nispasswd = arg->val; 251 252 if ((arg = getarg(args, 'p')) != NULL && arg->val) 253 cnf->password_days = atoi(arg->val); 254 255 if ((arg = getarg(args, 'g')) != NULL) { 256 if (!*(p = arg->val)) /* Handle empty group list specially */ 257 cnf->default_group = ""; 258 else { 259 if ((grp = GETGRNAM(p)) == NULL) { 260 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 261 errx(EX_NOUSER, "group `%s' does not exist", p); 262 } 263 cnf->default_group = newstr(grp->gr_name); 264 } 265 } 266 if ((arg = getarg(args, 'L')) != NULL) 267 cnf->default_class = pw_checkname(arg->val, 0); 268 269 if ((arg = getarg(args, 'G')) != NULL && arg->val) { 270 int i = 0; 271 272 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) { 273 if ((grp = GETGRNAM(p)) == NULL) { 274 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 275 errx(EX_NOUSER, "group `%s' does not exist", p); 276 } 277 if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1) 278 cnf->groups[i++] = newstr(grp->gr_name); 279 } 280 while (i < cnf->numgroups) 281 cnf->groups[i++] = NULL; 282 } 283 284 if ((arg = getarg(args, 'k')) != NULL) { 285 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode)) 286 errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir); 287 } 288 289 if ((arg = getarg(args, 's')) != NULL) 290 cnf->shell_default = arg->val; 291 292 if ((arg = getarg(args, 'w')) != NULL) 293 cnf->default_password = boolean_val(arg->val, cnf->default_password); 294 if (mode == M_ADD && getarg(args, 'D')) { 295 if (getarg(args, 'n') != NULL) 296 errx(EX_DATAERR, "can't combine `-D' with `-n name'"); 297 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 298 if ((cnf->min_uid = (uid_t) atoi(p)) == 0) 299 cnf->min_uid = 1000; 300 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid) 301 cnf->max_uid = 32000; 302 } 303 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 304 if ((cnf->min_gid = (gid_t) atoi(p)) == 0) 305 cnf->min_gid = 1000; 306 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid) 307 cnf->max_gid = 32000; 308 } 309 310 arg = getarg(args, 'C'); 311 if (write_userconfig(arg ? arg->val : NULL)) 312 return EXIT_SUCCESS; 313 err(EX_IOERR, "config udpate"); 314 } 315 316 if (mode == M_PRINT && getarg(args, 'a')) { 317 SETPWENT(); 318 while ((pwd = GETPWENT()) != NULL) 319 print_user(pwd); 320 ENDPWENT(); 321 return EXIT_SUCCESS; 322 } 323 324 if (name != NULL) 325 pwd = GETPWNAM(pw_checkname(name, 0)); 326 327 if (id < 0 && name == NULL) 328 errx(EX_DATAERR, "user name or id required"); 329 330 /* 331 * Update, delete & print require that the user exists 332 */ 333 if (mode == M_UPDATE || mode == M_DELETE || 334 mode == M_PRINT || mode == M_LOCK || mode == M_UNLOCK) { 335 336 if (name == NULL && pwd == NULL) /* Try harder */ 337 pwd = GETPWUID(id); 338 339 if (pwd == NULL) { 340 if (mode == M_PRINT && getarg(args, 'F')) { 341 fakeuser.pw_name = name ? name : "nouser"; 342 fakeuser.pw_uid = (uid_t) id; 343 return print_user(&fakeuser); 344 } 345 if (name == NULL) 346 errx(EX_NOUSER, "no such uid `%ld'", id); 347 errx(EX_NOUSER, "no such user `%s'", name); 348 } 349 350 if (name == NULL) 351 name = pwd->pw_name; 352 353 /* 354 * The M_LOCK and M_UNLOCK functions simply add or remove 355 * a "*LOCKED*" prefix from in front of the password to 356 * prevent it decoding correctly, and therefore prevents 357 * access. Of course, this only prevents access via 358 * password authentication (not ssh, kerberos or any 359 * other method that does not use the UNIX password) but 360 * that is a known limitation. 361 */ 362 363 if (mode == M_LOCK) { 364 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0) 365 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name); 366 asprintf(&passtmp, "%s%s", locked_str, pwd->pw_passwd); 367 if (passtmp == NULL) /* disaster */ 368 errx(EX_UNAVAILABLE, "out of memory"); 369 pwd->pw_passwd = passtmp; 370 edited = 1; 371 } else if (mode == M_UNLOCK) { 372 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0) 373 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name); 374 pwd->pw_passwd += sizeof(locked_str)-1; 375 edited = 1; 376 } else if (mode == M_DELETE) 377 return (delete_user(cnf, pwd, name, 378 getarg(args, 'r') != NULL, mode)); 379 else if (mode == M_PRINT) 380 return print_user(pwd); 381 382 /* 383 * The rest is edit code 384 */ 385 if ((arg = getarg(args, 'l')) != NULL) { 386 if (strcmp(pwd->pw_name, "root") == 0) 387 errx(EX_DATAERR, "can't rename `root' account"); 388 pwd->pw_name = pw_checkname(arg->val, 0); 389 edited = 1; 390 } 391 392 if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) { 393 pwd->pw_uid = (uid_t) atol(arg->val); 394 edited = 1; 395 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0) 396 errx(EX_DATAERR, "can't change uid of `root' account"); 397 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 398 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name); 399 } 400 401 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) { /* Already checked this */ 402 gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid; 403 if (newgid != pwd->pw_gid) { 404 edited = 1; 405 pwd->pw_gid = newgid; 406 } 407 } 408 409 if ((arg = getarg(args, 'p')) != NULL) { 410 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 411 if (pwd->pw_change != 0) { 412 pwd->pw_change = 0; 413 edited = 1; 414 } 415 } 416 else { 417 time_t now = time(NULL); 418 time_t expire = parse_date(now, arg->val); 419 420 if (pwd->pw_change != expire) { 421 pwd->pw_change = expire; 422 edited = 1; 423 } 424 } 425 } 426 427 if ((arg = getarg(args, 'e')) != NULL) { 428 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 429 if (pwd->pw_expire != 0) { 430 pwd->pw_expire = 0; 431 edited = 1; 432 } 433 } 434 else { 435 time_t now = time(NULL); 436 time_t expire = parse_date(now, arg->val); 437 438 if (pwd->pw_expire != expire) { 439 pwd->pw_expire = expire; 440 edited = 1; 441 } 442 } 443 } 444 445 if ((arg = getarg(args, 's')) != NULL) { 446 char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val); 447 if (shell == NULL) 448 shell = ""; 449 if (strcmp(shell, pwd->pw_shell) != 0) { 450 pwd->pw_shell = shell; 451 edited = 1; 452 } 453 } 454 455 if (getarg(args, 'L')) { 456 if (cnf->default_class == NULL) 457 cnf->default_class = ""; 458 if (strcmp(pwd->pw_class, cnf->default_class) != 0) { 459 pwd->pw_class = cnf->default_class; 460 edited = 1; 461 } 462 } 463 464 if ((arg = getarg(args, 'd')) != NULL) { 465 if (strcmp(pwd->pw_dir, arg->val)) 466 edited = 1; 467 if (stat(pwd->pw_dir = arg->val, &st) == -1) { 468 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0) 469 warnx("WARNING: home `%s' does not exist", pwd->pw_dir); 470 } else if (!S_ISDIR(st.st_mode)) 471 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir); 472 } 473 474 if ((arg = getarg(args, 'w')) != NULL && 475 getarg(args, 'h') == NULL && getarg(args, 'H') == NULL) { 476 login_cap_t *lc; 477 478 lc = login_getpwclass(pwd); 479 if (lc == NULL || 480 login_setcryptfmt(lc, "sha512", NULL) == NULL) 481 warn("setting crypt(3) format"); 482 login_close(lc); 483 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 484 edited = 1; 485 } 486 487 } else { 488 login_cap_t *lc; 489 490 /* 491 * Add code 492 */ 493 494 if (name == NULL) /* Required */ 495 errx(EX_DATAERR, "login name required"); 496 else if ((pwd = GETPWNAM(name)) != NULL) /* Exists */ 497 errx(EX_DATAERR, "login name `%s' already exists", name); 498 499 /* 500 * Now, set up defaults for a new user 501 */ 502 pwd = &fakeuser; 503 pwd->pw_name = name; 504 pwd->pw_class = cnf->default_class ? cnf->default_class : ""; 505 pwd->pw_uid = pw_uidpolicy(cnf, args); 506 pwd->pw_gid = pw_gidpolicy(args, pwd->pw_name, (gid_t) pwd->pw_uid); 507 pwd->pw_change = pw_pwdpolicy(cnf, args); 508 pwd->pw_expire = pw_exppolicy(cnf, args); 509 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name); 510 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL); 511 lc = login_getpwclass(pwd); 512 if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL) 513 warn("setting crypt(3) format"); 514 login_close(lc); 515 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 516 edited = 1; 517 518 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 519 warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name); 520 } 521 522 /* 523 * Shared add/edit code 524 */ 525 if ((arg = getarg(args, 'c')) != NULL) { 526 char *gecos = pw_checkname(arg->val, 1); 527 if (strcmp(pwd->pw_gecos, gecos) != 0) { 528 pwd->pw_gecos = gecos; 529 edited = 1; 530 } 531 } 532 533 if ((arg = getarg(args, 'h')) != NULL || 534 (arg = getarg(args, 'H')) != NULL) { 535 if (strcmp(arg->val, "-") == 0) { 536 if (!pwd->pw_passwd || *pwd->pw_passwd != '*') { 537 pwd->pw_passwd = "*"; /* No access */ 538 edited = 1; 539 } 540 } else { 541 int fd = atoi(arg->val); 542 int precrypt = (arg->ch == 'H'); 543 int b; 544 int istty = isatty(fd); 545 struct termios t; 546 login_cap_t *lc; 547 548 if (istty) { 549 if (tcgetattr(fd, &t) == -1) 550 istty = 0; 551 else { 552 struct termios n = t; 553 554 /* Disable echo */ 555 n.c_lflag &= ~(ECHO); 556 tcsetattr(fd, TCSANOW, &n); 557 printf("%s%spassword for user %s:", 558 (mode == M_UPDATE) ? "new " : "", 559 precrypt ? "encrypted " : "", 560 pwd->pw_name); 561 fflush(stdout); 562 } 563 } 564 b = read(fd, line, sizeof(line) - 1); 565 if (istty) { /* Restore state */ 566 tcsetattr(fd, TCSANOW, &t); 567 fputc('\n', stdout); 568 fflush(stdout); 569 } 570 if (b < 0) 571 err(EX_IOERR, "-%c file descriptor", 572 precrypt ? 'H' : 'h'); 573 line[b] = '\0'; 574 if ((p = strpbrk(line, "\r\n")) != NULL) 575 *p = '\0'; 576 if (!*line) 577 errx(EX_DATAERR, "empty password read on file descriptor %d", fd); 578 if (precrypt) { 579 if (strchr(line, ':') != NULL) 580 return EX_DATAERR; 581 pwd->pw_passwd = line; 582 } else { 583 lc = login_getpwclass(pwd); 584 if (lc == NULL || 585 login_setcryptfmt(lc, "sha512", NULL) == NULL) 586 warn("setting crypt(3) format"); 587 login_close(lc); 588 pwd->pw_passwd = pw_pwcrypt(line); 589 } 590 edited = 1; 591 } 592 } 593 594 /* 595 * Special case: -N only displays & exits 596 */ 597 if (conf.dryrun) 598 return print_user(pwd); 599 600 if (mode == M_ADD) { 601 edited = 1; /* Always */ 602 rc = addpwent(pwd); 603 if (rc == -1) 604 errx(EX_IOERR, "user '%s' already exists", 605 pwd->pw_name); 606 else if (rc != 0) 607 err(EX_IOERR, "passwd file update"); 608 if (cnf->nispasswd && *cnf->nispasswd=='/') { 609 rc = addnispwent(cnf->nispasswd, pwd); 610 if (rc == -1) 611 warnx("User '%s' already exists in NIS passwd", pwd->pw_name); 612 else 613 warn("NIS passwd update"); 614 /* NOTE: we treat NIS-only update errors as non-fatal */ 615 } 616 } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) { 617 if (edited) { /* Only updated this if required */ 618 rc = chgpwent(name, pwd); 619 if (rc == -1) 620 errx(EX_IOERR, "user '%s' does not exist (NIS?)", pwd->pw_name); 621 else if (rc != 0) 622 err(EX_IOERR, "passwd file update"); 623 if ( cnf->nispasswd && *cnf->nispasswd=='/') { 624 rc = chgnispwent(cnf->nispasswd, name, pwd); 625 if (rc == -1) 626 warn("User '%s' not found in NIS passwd", pwd->pw_name); 627 else 628 warn("NIS passwd update"); 629 /* NOTE: NIS-only update errors are not fatal */ 630 } 631 } 632 } 633 634 /* 635 * Ok, user is created or changed - now edit group file 636 */ 637 638 if (mode == M_ADD || getarg(args, 'G') != NULL) { 639 int i, j; 640 /* First remove the user from all group */ 641 SETGRENT(); 642 while ((grp = GETGRENT()) != NULL) { 643 char group[MAXLOGNAME]; 644 if (grp->gr_mem == NULL) 645 continue; 646 for (i = 0; grp->gr_mem[i] != NULL; i++) { 647 if (strcmp(grp->gr_mem[i] , pwd->pw_name) != 0) 648 continue; 649 for (j = i; grp->gr_mem[j] != NULL ; j++) 650 grp->gr_mem[j] = grp->gr_mem[j+1]; 651 strlcpy(group, grp->gr_name, MAXLOGNAME); 652 chggrent(group, grp); 653 } 654 } 655 ENDGRENT(); 656 657 /* now add to group where needed */ 658 for (i = 0; cnf->groups[i] != NULL; i++) { 659 grp = GETGRNAM(cnf->groups[i]); 660 grp = gr_add(grp, pwd->pw_name); 661 /* 662 * grp can only be NULL in 2 cases: 663 * - the new member is already a member 664 * - a problem with memory occurs 665 * in both cases we want to skip now. 666 */ 667 if (grp == NULL) 668 continue; 669 chggrent(cnf->groups[i], grp); 670 free(grp); 671 } 672 } 673 674 675 /* go get a current version of pwd */ 676 pwd = GETPWNAM(name); 677 if (pwd == NULL) { 678 /* This will fail when we rename, so special case that */ 679 if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) { 680 name = arg->val; /* update new name */ 681 pwd = GETPWNAM(name); /* refetch renamed rec */ 682 } 683 } 684 if (pwd == NULL) /* can't go on without this */ 685 errx(EX_NOUSER, "user '%s' disappeared during update", name); 686 687 grp = GETGRGID(pwd->pw_gid); 688 pw_log(cnf, mode, W_USER, "%s(%u):%s(%u):%s:%s:%s", 689 pwd->pw_name, pwd->pw_uid, 690 grp ? grp->gr_name : "unknown", (grp ? grp->gr_gid : (uid_t)-1), 691 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 692 693 /* 694 * If adding, let's touch and chown the user's mail file. This is not 695 * strictly necessary under BSD with a 0755 maildir but it also 696 * doesn't hurt anything to create the empty mailfile 697 */ 698 if (mode == M_ADD) { 699 if (PWALTDIR() != PWF_ALT) { 700 arg = getarg(args, 'R'); 701 snprintf(path, sizeof(path), "%s%s/%s", 702 arg ? arg->val : "", _PATH_MAILDIR, pwd->pw_name); 703 close(open(path, O_RDWR | O_CREAT, 0600)); /* Preserve contents & 704 * mtime */ 705 chown(path, pwd->pw_uid, pwd->pw_gid); 706 } 707 } 708 709 /* 710 * Let's create and populate the user's home directory. Note 711 * that this also `works' for editing users if -m is used, but 712 * existing files will *not* be overwritten. 713 */ 714 if (PWALTDIR() != PWF_ALT && getarg(args, 'm') != NULL && pwd->pw_dir && 715 *pwd->pw_dir == '/' && pwd->pw_dir[1]) 716 create_and_populate_homedir(mode, pwd); 717 718 /* 719 * Finally, send mail to the new user as well, if we are asked to 720 */ 721 if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) { 722 FILE *pfp = popen(_PATH_SENDMAIL " -t", "w"); 723 724 if (pfp == NULL) 725 warn("sendmail"); 726 else { 727 fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name); 728 while (fgets(line, sizeof(line), fp) != NULL) { 729 /* Do substitutions? */ 730 fputs(line, pfp); 731 } 732 pclose(pfp); 733 pw_log(cnf, mode, W_USER, "%s(%u) new user mail sent", 734 pwd->pw_name, pwd->pw_uid); 735 } 736 fclose(fp); 737 } 738 739 return EXIT_SUCCESS; 740} 741 742 743static uid_t 744pw_uidpolicy(struct userconf * cnf, struct cargs * args) 745{ 746 struct passwd *pwd; 747 uid_t uid = (uid_t) - 1; 748 struct carg *a_uid = getarg(args, 'u'); 749 750 /* 751 * Check the given uid, if any 752 */ 753 if (a_uid != NULL) { 754 uid = (uid_t) atol(a_uid->val); 755 756 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL) 757 errx(EX_DATAERR, "uid `%u' has already been allocated", pwd->pw_uid); 758 } else { 759 struct bitmap bm; 760 761 /* 762 * We need to allocate the next available uid under one of 763 * two policies a) Grab the first unused uid b) Grab the 764 * highest possible unused uid 765 */ 766 if (cnf->min_uid >= cnf->max_uid) { /* Sanity 767 * claus^H^H^H^Hheck */ 768 cnf->min_uid = 1000; 769 cnf->max_uid = 32000; 770 } 771 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1); 772 773 /* 774 * Now, let's fill the bitmap from the password file 775 */ 776 SETPWENT(); 777 while ((pwd = GETPWENT()) != NULL) 778 if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid) 779 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid); 780 ENDPWENT(); 781 782 /* 783 * Then apply the policy, with fallback to reuse if necessary 784 */ 785 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid) 786 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid); 787 788 /* 789 * Another sanity check 790 */ 791 if (uid < cnf->min_uid || uid > cnf->max_uid) 792 errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used"); 793 bm_dealloc(&bm); 794 } 795 return uid; 796} 797 798 799static uid_t 800pw_gidpolicy(struct cargs * args, char *nam, gid_t prefer) 801{ 802 struct group *grp; 803 gid_t gid = (uid_t) - 1; 804 struct carg *a_gid = getarg(args, 'g'); 805 struct userconf *cnf = conf.userconf; 806 807 /* 808 * If no arg given, see if default can help out 809 */ 810 if (a_gid == NULL && cnf->default_group && *cnf->default_group) 811 a_gid = addarg(args, 'g', cnf->default_group); 812 813 /* 814 * Check the given gid, if any 815 */ 816 SETGRENT(); 817 if (a_gid != NULL) { 818 if ((grp = GETGRNAM(a_gid->val)) == NULL) { 819 gid = (gid_t) atol(a_gid->val); 820 if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL) 821 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val); 822 } 823 gid = grp->gr_gid; 824 } else if ((grp = GETGRNAM(nam)) != NULL && 825 (grp->gr_mem == NULL || grp->gr_mem[0] == NULL)) { 826 gid = grp->gr_gid; /* Already created? Use it anyway... */ 827 } else { 828 struct cargs grpargs; 829 char tmp[32]; 830 831 LIST_INIT(&grpargs); 832 833 /* 834 * We need to auto-create a group with the user's name. We 835 * can send all the appropriate output to our sister routine 836 * bit first see if we can create a group with gid==uid so we 837 * can keep the user and group ids in sync. We purposely do 838 * NOT check the gid range if we can force the sync. If the 839 * user's name dups an existing group, then the group add 840 * function will happily handle that case for us and exit. 841 */ 842 if (GETGRGID(prefer) == NULL) { 843 snprintf(tmp, sizeof(tmp), "%u", prefer); 844 addarg(&grpargs, 'g', tmp); 845 } 846 if (conf.dryrun) { 847 addarg(&grpargs, 'q', NULL); 848 gid = pw_group(M_NEXT, nam, -1, &grpargs); 849 } 850 else 851 { 852 pw_group(M_ADD, nam, -1, &grpargs); 853 if ((grp = GETGRNAM(nam)) != NULL) 854 gid = grp->gr_gid; 855 } 856 a_gid = LIST_FIRST(&grpargs); 857 while (a_gid != NULL) { 858 struct carg *t = LIST_NEXT(a_gid, list); 859 LIST_REMOVE(a_gid, list); 860 a_gid = t; 861 } 862 } 863 ENDGRENT(); 864 return gid; 865} 866 867 868static time_t 869pw_pwdpolicy(struct userconf * cnf, struct cargs * args) 870{ 871 time_t result = 0; 872 time_t now = time(NULL); 873 struct carg *arg = getarg(args, 'p'); 874 875 if (arg != NULL) { 876 if ((result = parse_date(now, arg->val)) == now) 877 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 878 } else if (cnf->password_days > 0) 879 result = now + ((long) cnf->password_days * 86400L); 880 return result; 881} 882 883 884static time_t 885pw_exppolicy(struct userconf * cnf, struct cargs * args) 886{ 887 time_t result = 0; 888 time_t now = time(NULL); 889 struct carg *arg = getarg(args, 'e'); 890 891 if (arg != NULL) { 892 if ((result = parse_date(now, arg->val)) == now) 893 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 894 } else if (cnf->expire_days > 0) 895 result = now + ((long) cnf->expire_days * 86400L); 896 return result; 897} 898 899 900static char * 901pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user) 902{ 903 struct carg *arg = getarg(args, 'd'); 904 static char home[128]; 905 906 if (arg) 907 return (arg->val); 908 909 if (cnf->home == NULL || *cnf->home == '\0') 910 errx(EX_CONFIG, "no base home directory set"); 911 snprintf(home, sizeof(home), "%s/%s", cnf->home, user); 912 913 return (home); 914} 915 916static char * 917shell_path(char const * path, char *shells[], char *sh) 918{ 919 if (sh != NULL && (*sh == '/' || *sh == '\0')) 920 return sh; /* specified full path or forced none */ 921 else { 922 char *p; 923 char paths[_UC_MAXLINE]; 924 925 /* 926 * We need to search paths 927 */ 928 strlcpy(paths, path, sizeof(paths)); 929 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) { 930 int i; 931 static char shellpath[256]; 932 933 if (sh != NULL) { 934 snprintf(shellpath, sizeof(shellpath), "%s/%s", p, sh); 935 if (access(shellpath, X_OK) == 0) 936 return shellpath; 937 } else 938 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) { 939 snprintf(shellpath, sizeof(shellpath), "%s/%s", p, shells[i]); 940 if (access(shellpath, X_OK) == 0) 941 return shellpath; 942 } 943 } 944 if (sh == NULL) 945 errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh); 946 errx(EX_CONFIG, "no default shell available or defined"); 947 return NULL; 948 } 949} 950 951 952static char * 953pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell) 954{ 955 char *sh = newshell; 956 struct carg *arg = getarg(args, 's'); 957 958 if (newshell == NULL && arg != NULL) 959 sh = arg->val; 960 return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default); 961} 962 963#define SALTSIZE 32 964 965static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./"; 966 967char * 968pw_pwcrypt(char *password) 969{ 970 int i; 971 char salt[SALTSIZE + 1]; 972 char *cryptpw; 973 974 static char buf[256]; 975 976 /* 977 * Calculate a salt value 978 */ 979 for (i = 0; i < SALTSIZE; i++) 980 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)]; 981 salt[SALTSIZE] = '\0'; 982 983 cryptpw = crypt(password, salt); 984 if (cryptpw == NULL) 985 errx(EX_CONFIG, "crypt(3) failure"); 986 return strcpy(buf, cryptpw); 987} 988 989 990static char * 991pw_password(struct userconf * cnf, struct cargs * args, char const * user) 992{ 993 int i, l; 994 char pwbuf[32]; 995 996 switch (cnf->default_password) { 997 case -1: /* Random password */ 998 l = (arc4random() % 8 + 8); /* 8 - 16 chars */ 999 for (i = 0; i < l; i++) 1000 pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)]; 1001 pwbuf[i] = '\0'; 1002 1003 /* 1004 * We give this information back to the user 1005 */ 1006 if (getarg(args, 'h') == NULL && getarg(args, 'H') == NULL && 1007 !conf.dryrun) { 1008 if (isatty(STDOUT_FILENO)) 1009 printf("Password for '%s' is: ", user); 1010 printf("%s\n", pwbuf); 1011 fflush(stdout); 1012 } 1013 break; 1014 1015 case -2: /* No password at all! */ 1016 return ""; 1017 1018 case 0: /* No login - default */ 1019 default: 1020 return "*"; 1021 1022 case 1: /* user's name */ 1023 strlcpy(pwbuf, user, sizeof(pwbuf)); 1024 break; 1025 } 1026 return pw_pwcrypt(pwbuf); 1027} 1028 1029static int 1030delete_user(struct userconf *cnf, struct passwd *pwd, char *name, 1031 int delete, int mode) 1032{ 1033 char file[MAXPATHLEN]; 1034 char home[MAXPATHLEN]; 1035 uid_t uid = pwd->pw_uid; 1036 struct group *gr, *grp; 1037 char grname[LOGNAMESIZE]; 1038 int rc; 1039 struct stat st; 1040 1041 if (strcmp(pwd->pw_name, "root") == 0) 1042 errx(EX_DATAERR, "cannot remove user 'root'"); 1043 1044 if (!PWALTDIR()) { 1045 /* 1046 * Remove opie record from /etc/opiekeys 1047 */ 1048 1049 rmopie(pwd->pw_name); 1050 1051 /* 1052 * Remove crontabs 1053 */ 1054 snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name); 1055 if (access(file, F_OK) == 0) { 1056 snprintf(file, sizeof(file), "crontab -u %s -r", pwd->pw_name); 1057 system(file); 1058 } 1059 } 1060 /* 1061 * Save these for later, since contents of pwd may be 1062 * invalidated by deletion 1063 */ 1064 snprintf(file, sizeof(file), "%s/%s", _PATH_MAILDIR, pwd->pw_name); 1065 strlcpy(home, pwd->pw_dir, sizeof(home)); 1066 gr = GETGRGID(pwd->pw_gid); 1067 if (gr != NULL) 1068 strlcpy(grname, gr->gr_name, LOGNAMESIZE); 1069 else 1070 grname[0] = '\0'; 1071 1072 rc = delpwent(pwd); 1073 if (rc == -1) 1074 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name); 1075 else if (rc != 0) 1076 err(EX_IOERR, "passwd update"); 1077 1078 if (cnf->nispasswd && *cnf->nispasswd=='/') { 1079 rc = delnispwent(cnf->nispasswd, name); 1080 if (rc == -1) 1081 warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name); 1082 else if (rc != 0) 1083 warn("WARNING: NIS passwd update"); 1084 /* non-fatal */ 1085 } 1086 1087 grp = GETGRNAM(name); 1088 if (grp != NULL && 1089 (grp->gr_mem == NULL || *grp->gr_mem == NULL) && 1090 strcmp(name, grname) == 0) 1091 delgrent(GETGRNAM(name)); 1092 SETGRENT(); 1093 while ((grp = GETGRENT()) != NULL) { 1094 int i, j; 1095 char group[MAXLOGNAME]; 1096 if (grp->gr_mem == NULL) 1097 continue; 1098 1099 for (i = 0; grp->gr_mem[i] != NULL; i++) { 1100 if (strcmp(grp->gr_mem[i], name) != 0) 1101 continue; 1102 1103 for (j = i; grp->gr_mem[j] != NULL; j++) 1104 grp->gr_mem[j] = grp->gr_mem[j+1]; 1105 strlcpy(group, grp->gr_name, MAXLOGNAME); 1106 chggrent(group, grp); 1107 } 1108 } 1109 ENDGRENT(); 1110 1111 pw_log(cnf, mode, W_USER, "%s(%u) account removed", name, uid); 1112 1113 if (!PWALTDIR()) { 1114 /* 1115 * Remove mail file 1116 */ 1117 remove(file); 1118 1119 /* 1120 * Remove at jobs 1121 */ 1122 if (getpwuid(uid) == NULL) 1123 rmat(uid); 1124 1125 /* 1126 * Remove home directory and contents 1127 */ 1128 if (delete && *home == '/' && getpwuid(uid) == NULL && 1129 stat(home, &st) != -1) { 1130 rm_r(home, uid); 1131 pw_log(cnf, mode, W_USER, "%s(%u) home '%s' %sremoved", 1132 name, uid, home, 1133 stat(home, &st) == -1 ? "" : "not completely "); 1134 } 1135 } 1136 1137 return (EXIT_SUCCESS); 1138} 1139 1140static int 1141print_user(struct passwd * pwd) 1142{ 1143 if (!conf.pretty) { 1144 char *buf; 1145 1146 if (!conf.v7) 1147 pwd->pw_passwd = (pwd->pw_passwd == NULL) ? "" : "*"; 1148 1149 buf = conf.v7 ? pw_make_v7(pwd) : pw_make(pwd); 1150 printf("%s\n", buf); 1151 free(buf); 1152 } else { 1153 int j; 1154 char *p; 1155 struct group *grp = GETGRGID(pwd->pw_gid); 1156 char uname[60] = "User &", office[60] = "[None]", 1157 wphone[60] = "[None]", hphone[60] = "[None]"; 1158 char acexpire[32] = "[None]", pwexpire[32] = "[None]"; 1159 struct tm * tptr; 1160 1161 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) { 1162 strlcpy(uname, p, sizeof(uname)); 1163 if ((p = strtok(NULL, ",")) != NULL) { 1164 strlcpy(office, p, sizeof(office)); 1165 if ((p = strtok(NULL, ",")) != NULL) { 1166 strlcpy(wphone, p, sizeof(wphone)); 1167 if ((p = strtok(NULL, "")) != NULL) { 1168 strlcpy(hphone, p, 1169 sizeof(hphone)); 1170 } 1171 } 1172 } 1173 } 1174 /* 1175 * Handle '&' in gecos field 1176 */ 1177 if ((p = strchr(uname, '&')) != NULL) { 1178 int l = strlen(pwd->pw_name); 1179 int m = strlen(p); 1180 1181 memmove(p + l, p + 1, m); 1182 memmove(p, pwd->pw_name, l); 1183 *p = (char) toupper((unsigned char)*p); 1184 } 1185 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL) 1186 strftime(acexpire, sizeof acexpire, "%c", tptr); 1187 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL) 1188 strftime(pwexpire, sizeof pwexpire, "%c", tptr); 1189 printf("Login Name: %-15s #%-12u Group: %-15s #%u\n" 1190 " Full Name: %s\n" 1191 " Home: %-26.26s Class: %s\n" 1192 " Shell: %-26.26s Office: %s\n" 1193 "Work Phone: %-26.26s Home Phone: %s\n" 1194 "Acc Expire: %-26.26s Pwd Expire: %s\n", 1195 pwd->pw_name, pwd->pw_uid, 1196 grp ? grp->gr_name : "(invalid)", pwd->pw_gid, 1197 uname, pwd->pw_dir, pwd->pw_class, 1198 pwd->pw_shell, office, wphone, hphone, 1199 acexpire, pwexpire); 1200 SETGRENT(); 1201 j = 0; 1202 while ((grp=GETGRENT()) != NULL) 1203 { 1204 int i = 0; 1205 if (grp->gr_mem != NULL) { 1206 while (grp->gr_mem[i] != NULL) 1207 { 1208 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) 1209 { 1210 printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name); 1211 break; 1212 } 1213 ++i; 1214 } 1215 } 1216 } 1217 ENDGRENT(); 1218 printf("%s", j ? "\n" : ""); 1219 } 1220 return EXIT_SUCCESS; 1221} 1222 1223char * 1224pw_checkname(char *name, int gecos) 1225{ 1226 char showch[8]; 1227 const char *badchars, *ch, *showtype; 1228 int reject; 1229 1230 ch = name; 1231 reject = 0; 1232 if (gecos) { 1233 /* See if the name is valid as a gecos (comment) field. */ 1234 badchars = ":!@"; 1235 showtype = "gecos field"; 1236 } else { 1237 /* See if the name is valid as a userid or group. */ 1238 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\""; 1239 showtype = "userid/group name"; 1240 /* Userids and groups can not have a leading '-'. */ 1241 if (*ch == '-') 1242 reject = 1; 1243 } 1244 if (!reject) { 1245 while (*ch) { 1246 if (strchr(badchars, *ch) != NULL || *ch < ' ' || 1247 *ch == 127) { 1248 reject = 1; 1249 break; 1250 } 1251 /* 8-bit characters are only allowed in GECOS fields */ 1252 if (!gecos && (*ch & 0x80)) { 1253 reject = 1; 1254 break; 1255 } 1256 ch++; 1257 } 1258 } 1259 /* 1260 * A `$' is allowed as the final character for userids and groups, 1261 * mainly for the benefit of samba. 1262 */ 1263 if (reject && !gecos) { 1264 if (*ch == '$' && *(ch + 1) == '\0') { 1265 reject = 0; 1266 ch++; 1267 } 1268 } 1269 if (reject) { 1270 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127) 1271 ? "`%c'" : "0x%02x", *ch); 1272 errx(EX_DATAERR, "invalid character %s at position %td in %s", 1273 showch, (ch - name), showtype); 1274 } 1275 if (!gecos && (ch - name) > LOGNAMESIZE) 1276 errx(EX_DATAERR, "name too long `%s' (max is %d)", name, 1277 LOGNAMESIZE); 1278 1279 return (name); 1280} 1281 1282 1283static void 1284rmat(uid_t uid) 1285{ 1286 DIR *d = opendir("/var/at/jobs"); 1287 1288 if (d != NULL) { 1289 struct dirent *e; 1290 1291 while ((e = readdir(d)) != NULL) { 1292 struct stat st; 1293 1294 if (strncmp(e->d_name, ".lock", 5) != 0 && 1295 stat(e->d_name, &st) == 0 && 1296 !S_ISDIR(st.st_mode) && 1297 st.st_uid == uid) { 1298 char tmp[MAXPATHLEN]; 1299 1300 snprintf(tmp, sizeof(tmp), "/usr/bin/atrm %s", e->d_name); 1301 system(tmp); 1302 } 1303 } 1304 closedir(d); 1305 } 1306} 1307 1308static void 1309rmopie(char const * name) 1310{ 1311 static const char etcopie[] = "/etc/opiekeys"; 1312 FILE *fp = fopen(etcopie, "r+"); 1313 1314 if (fp != NULL) { 1315 char tmp[1024]; 1316 off_t atofs = 0; 1317 int length = strlen(name); 1318 1319 while (fgets(tmp, sizeof tmp, fp) != NULL) { 1320 if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') { 1321 if (fseek(fp, atofs, SEEK_SET) == 0) { 1322 fwrite("#", 1, 1, fp); /* Comment username out */ 1323 } 1324 break; 1325 } 1326 atofs = ftell(fp); 1327 } 1328 /* 1329 * If we got an error of any sort, don't update! 1330 */ 1331 fclose(fp); 1332 } 1333} 1334 1335