1 /*- 2 * Copyright (C) 1996 3 * David L. Nugent. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #ifndef lint 29 static const char rcsid[] = 30 "$FreeBSD$"; 31 #endif /* not lint */ 32 33 #include <ctype.h> 34 #include <err.h> 35 #include <fcntl.h> 36 #include <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 <unistd.h> 44 #include <utmp.h> 45 #include <login_cap.h> 46 #if defined(USE_MD5RAND) 47 #include <md5.h> 48 #endif 49 #include "pw.h" 50 #include "bitmap.h" 51 52 #if (MAXLOGNAME-1) > UT_NAMESIZE 53 #define LOGNAMESIZE UT_NAMESIZE 54 #else 55 #define LOGNAMESIZE (MAXLOGNAME-1) 56 #endif 57 58 static char locked_str[] = "*LOCKED*"; 59 60 static int print_user(struct passwd * pwd, int pretty, int v7); 61 static uid_t pw_uidpolicy(struct userconf * cnf, struct cargs * args); 62 static uid_t pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer); 63 static time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args); 64 static time_t pw_exppolicy(struct userconf * cnf, struct cargs * args); 65 static char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user); 66 static char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell); 67 static char *pw_password(struct userconf * cnf, struct cargs * args, char const * user); 68 static char *shell_path(char const * path, char *shells[], char *sh); 69 static void rmat(uid_t uid); 70 static void rmopie(char const * name); 71 72 /*- 73 * -C config configuration file 74 * -q quiet operation 75 * -n name login name 76 * -u uid user id 77 * -c comment user name/comment 78 * -d directory home directory 79 * -e date account expiry date 80 * -p date password expiry date 81 * -g grp primary group 82 * -G grp1,grp2 additional groups 83 * -m [ -k dir ] create and set up home 84 * -s shell name of login shell 85 * -o duplicate uid ok 86 * -L class user class 87 * -l name new login name 88 * -h fd password filehandle 89 * -H fd encrypted password filehandle 90 * -F force print or add 91 * Setting defaults: 92 * -D set user defaults 93 * -b dir default home root dir 94 * -e period default expiry period 95 * -p period default password change period 96 * -g group default group 97 * -G grp1,grp2.. default additional groups 98 * -L class default login class 99 * -k dir default home skeleton 100 * -s shell default shell 101 * -w method default password method 102 */ 103 104 int 105 pw_user(struct userconf * cnf, int mode, struct cargs * args) 106 { 107 int rc, edited = 0; 108 char *p = NULL; 109 char *passtmp; 110 struct carg *a_name; 111 struct carg *a_uid; 112 struct carg *arg; 113 struct passwd *pwd = NULL; 114 struct group *grp; 115 struct stat st; 116 char line[_PASSWORD_LEN+1]; 117 FILE *fp; 118 119 static struct passwd fakeuser = 120 { 121 NULL, 122 "*", 123 -1, 124 -1, 125 0, 126 "", 127 "User &", 128 "/nonexistent", 129 "/bin/sh", 130 0 131 #if defined(__FreeBSD__) 132 ,0 133 #endif 134 }; 135 136 137 /* 138 * With M_NEXT, we only need to return the 139 * next uid to stdout 140 */ 141 if (mode == M_NEXT) 142 { 143 uid_t next = pw_uidpolicy(cnf, args); 144 if (getarg(args, 'q')) 145 return next; 146 printf("%ld:", (long)next); 147 pw_group(cnf, mode, args); 148 return EXIT_SUCCESS; 149 } 150 151 /* 152 * We can do all of the common legwork here 153 */ 154 155 if ((arg = getarg(args, 'b')) != NULL) { 156 cnf->home = arg->val; 157 } 158 159 /* 160 * If we'll need to use it or we're updating it, 161 * then create the base home directory if necessary 162 */ 163 if (arg != NULL || getarg(args, 'm') != NULL) { 164 int l = strlen(cnf->home); 165 166 if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */ 167 cnf->home[--l] = '\0'; 168 169 if (l < 2 || *cnf->home != '/') /* Check for absolute path name */ 170 errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home); 171 172 if (stat(cnf->home, &st) == -1) { 173 char dbuf[MAXPATHLEN]; 174 175 /* 176 * This is a kludge especially for Joerg :) 177 * If the home directory would be created in the root partition, then 178 * we really create it under /usr which is likely to have more space. 179 * But we create a symlink from cnf->home -> "/usr" -> cnf->home 180 */ 181 if (strchr(cnf->home+1, '/') == NULL) { 182 strcpy(dbuf, "/usr"); 183 strncat(dbuf, cnf->home, MAXPATHLEN-5); 184 if (mkdir(dbuf, 0755) != -1 || errno == EEXIST) { 185 chown(dbuf, 0, 0); 186 /* 187 * Skip first "/" and create symlink: 188 * /home -> usr/home 189 */ 190 symlink(dbuf+1, cnf->home); 191 } 192 /* If this falls, fall back to old method */ 193 } 194 strlcpy(dbuf, cnf->home, sizeof(dbuf)); 195 p = dbuf; 196 if (stat(dbuf, &st) == -1) { 197 while ((p = strchr(++p, '/')) != NULL) { 198 *p = '\0'; 199 if (stat(dbuf, &st) == -1) { 200 if (mkdir(dbuf, 0755) == -1) 201 goto direrr; 202 chown(dbuf, 0, 0); 203 } else if (!S_ISDIR(st.st_mode)) 204 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf); 205 *p = '/'; 206 } 207 } 208 if (stat(dbuf, &st) == -1) { 209 if (mkdir(dbuf, 0755) == -1) { 210 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf); 211 } 212 chown(dbuf, 0, 0); 213 } 214 } else if (!S_ISDIR(st.st_mode)) 215 errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home); 216 } 217 218 if ((arg = getarg(args, 'e')) != NULL) 219 cnf->expire_days = atoi(arg->val); 220 221 if ((arg = getarg(args, 'y')) != NULL) 222 cnf->nispasswd = arg->val; 223 224 if ((arg = getarg(args, 'p')) != NULL && arg->val) 225 cnf->password_days = atoi(arg->val); 226 227 if ((arg = getarg(args, 'g')) != NULL) { 228 if (!*(p = arg->val)) /* Handle empty group list specially */ 229 cnf->default_group = ""; 230 else { 231 if ((grp = GETGRNAM(p)) == NULL) { 232 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 233 errx(EX_NOUSER, "group `%s' does not exist", p); 234 } 235 cnf->default_group = newstr(grp->gr_name); 236 } 237 } 238 if ((arg = getarg(args, 'L')) != NULL) 239 cnf->default_class = pw_checkname((u_char *)arg->val, 0); 240 241 if ((arg = getarg(args, 'G')) != NULL && arg->val) { 242 int i = 0; 243 244 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) { 245 if ((grp = GETGRNAM(p)) == NULL) { 246 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 247 errx(EX_NOUSER, "group `%s' does not exist", p); 248 } 249 if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1) 250 cnf->groups[i++] = newstr(grp->gr_name); 251 } 252 while (i < cnf->numgroups) 253 cnf->groups[i++] = NULL; 254 } 255 256 if ((arg = getarg(args, 'k')) != NULL) { 257 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode)) 258 errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir); 259 } 260 261 if ((arg = getarg(args, 's')) != NULL) 262 cnf->shell_default = arg->val; 263 264 if ((arg = getarg(args, 'w')) != NULL) 265 cnf->default_password = boolean_val(arg->val, cnf->default_password); 266 if (mode == M_ADD && getarg(args, 'D')) { 267 if (getarg(args, 'n') != NULL) 268 errx(EX_DATAERR, "can't combine `-D' with `-n name'"); 269 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 270 if ((cnf->min_uid = (uid_t) atoi(p)) == 0) 271 cnf->min_uid = 1000; 272 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid) 273 cnf->max_uid = 32000; 274 } 275 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 276 if ((cnf->min_gid = (gid_t) atoi(p)) == 0) 277 cnf->min_gid = 1000; 278 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid) 279 cnf->max_gid = 32000; 280 } 281 282 arg = getarg(args, 'C'); 283 if (write_userconfig(arg ? arg->val : NULL)) 284 return EXIT_SUCCESS; 285 warn("config update"); 286 return EX_IOERR; 287 } 288 289 if (mode == M_PRINT && getarg(args, 'a')) { 290 int pretty = getarg(args, 'P') != NULL; 291 int v7 = getarg(args, '7') != NULL; 292 293 SETPWENT(); 294 while ((pwd = GETPWENT()) != NULL) 295 print_user(pwd, pretty, v7); 296 ENDPWENT(); 297 return EXIT_SUCCESS; 298 } 299 300 if ((a_name = getarg(args, 'n')) != NULL) 301 pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0)); 302 a_uid = getarg(args, 'u'); 303 304 if (a_uid == NULL) { 305 if (a_name == NULL) 306 errx(EX_DATAERR, "user name or id required"); 307 308 /* 309 * Determine whether 'n' switch is name or uid - we don't 310 * really don't really care which we have, but we need to 311 * know. 312 */ 313 if (mode != M_ADD && pwd == NULL 314 && strspn(a_name->val, "0123456789") == strlen(a_name->val) 315 && atoi(a_name->val) > 0) { /* Assume uid */ 316 (a_uid = a_name)->ch = 'u'; 317 a_name = NULL; 318 } 319 } 320 321 /* 322 * Update, delete & print require that the user exists 323 */ 324 if (mode == M_UPDATE || mode == M_DELETE || 325 mode == M_PRINT || mode == M_LOCK || mode == M_UNLOCK) { 326 327 if (a_name == NULL && pwd == NULL) /* Try harder */ 328 pwd = GETPWUID(atoi(a_uid->val)); 329 330 if (pwd == NULL) { 331 if (mode == M_PRINT && getarg(args, 'F')) { 332 fakeuser.pw_name = a_name ? a_name->val : "nouser"; 333 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1; 334 return print_user(&fakeuser, 335 getarg(args, 'P') != NULL, 336 getarg(args, '7') != NULL); 337 } 338 if (a_name == NULL) 339 errx(EX_NOUSER, "no such uid `%s'", a_uid->val); 340 errx(EX_NOUSER, "no such user `%s'", a_name->val); 341 } 342 343 if (a_name == NULL) /* May be needed later */ 344 a_name = addarg(args, 'n', newstr(pwd->pw_name)); 345 346 /* 347 * The M_LOCK and M_UNLOCK functions simply add or remove 348 * a "*LOCKED*" prefix from in front of the password to 349 * prevent it decoding correctly, and therefore prevents 350 * access. Of course, this only prevents access via 351 * password authentication (not ssh, kerberos or any 352 * other method that does not use the UNIX password) but 353 * that is a known limitation. 354 */ 355 356 if (mode == M_LOCK) { 357 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0) 358 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name); 359 passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str)); 360 if (passtmp == NULL) /* disaster */ 361 errx(EX_UNAVAILABLE, "out of memory"); 362 strcpy(passtmp, locked_str); 363 strcat(passtmp, pwd->pw_passwd); 364 pwd->pw_passwd = passtmp; 365 edited = 1; 366 } else if (mode == M_UNLOCK) { 367 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0) 368 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name); 369 pwd->pw_passwd += sizeof(locked_str)-1; 370 edited = 1; 371 } else if (mode == M_DELETE) { 372 /* 373 * Handle deletions now 374 */ 375 char file[MAXPATHLEN]; 376 char home[MAXPATHLEN]; 377 uid_t uid = pwd->pw_uid; 378 379 if (strcmp(pwd->pw_name, "root") == 0) 380 errx(EX_DATAERR, "cannot remove user 'root'"); 381 382 if (!PWALTDIR()) { 383 /* 384 * Remove opie record from /etc/opiekeys 385 */ 386 387 rmopie(pwd->pw_name); 388 389 /* 390 * Remove crontabs 391 */ 392 sprintf(file, "/var/cron/tabs/%s", pwd->pw_name); 393 if (access(file, F_OK) == 0) { 394 sprintf(file, "crontab -u %s -r", pwd->pw_name); 395 system(file); 396 } 397 } 398 /* 399 * Save these for later, since contents of pwd may be 400 * invalidated by deletion 401 */ 402 sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name); 403 strlcpy(home, pwd->pw_dir, sizeof(home)); 404 405 rc = delpwent(pwd); 406 if (rc == -1) 407 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name); 408 else if (rc != 0) { 409 warn("passwd update"); 410 return EX_IOERR; 411 } 412 413 if (cnf->nispasswd && *cnf->nispasswd=='/') { 414 rc = delnispwent(cnf->nispasswd, a_name->val); 415 if (rc == -1) 416 warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name); 417 else if (rc != 0) 418 warn("WARNING: NIS passwd update"); 419 /* non-fatal */ 420 } 421 422 editgroups(a_name->val, NULL); 423 424 pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid); 425 426 if (!PWALTDIR()) { 427 /* 428 * Remove mail file 429 */ 430 remove(file); 431 432 /* 433 * Remove at jobs 434 */ 435 if (getpwuid(uid) == NULL) 436 rmat(uid); 437 438 /* 439 * Remove home directory and contents 440 */ 441 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) { 442 if (stat(home, &st) != -1) { 443 rm_r(home, uid); 444 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved", 445 a_name->val, (long) uid, home, 446 stat(home, &st) == -1 ? "" : "not completely "); 447 } 448 } 449 } 450 return EXIT_SUCCESS; 451 } else if (mode == M_PRINT) 452 return print_user(pwd, 453 getarg(args, 'P') != NULL, 454 getarg(args, '7') != NULL); 455 456 /* 457 * The rest is edit code 458 */ 459 if ((arg = getarg(args, 'l')) != NULL) { 460 if (strcmp(pwd->pw_name, "root") == 0) 461 errx(EX_DATAERR, "can't rename `root' account"); 462 pwd->pw_name = pw_checkname((u_char *)arg->val, 0); 463 edited = 1; 464 } 465 466 if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) { 467 pwd->pw_uid = (uid_t) atol(arg->val); 468 edited = 1; 469 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0) 470 errx(EX_DATAERR, "can't change uid of `root' account"); 471 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 472 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name); 473 } 474 475 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) { /* Already checked this */ 476 gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid; 477 if (newgid != pwd->pw_gid) { 478 edited = 1; 479 pwd->pw_gid = newgid; 480 } 481 } 482 483 if ((arg = getarg(args, 'p')) != NULL) { 484 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 485 if (pwd->pw_change != 0) { 486 pwd->pw_change = 0; 487 edited = 1; 488 } 489 } 490 else { 491 time_t now = time(NULL); 492 time_t expire = parse_date(now, arg->val); 493 494 if (now == expire) 495 errx(EX_DATAERR, "invalid password change date `%s'", arg->val); 496 if (pwd->pw_change != expire) { 497 pwd->pw_change = expire; 498 edited = 1; 499 } 500 } 501 } 502 503 if ((arg = getarg(args, 'e')) != NULL) { 504 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 505 if (pwd->pw_expire != 0) { 506 pwd->pw_expire = 0; 507 edited = 1; 508 } 509 } 510 else { 511 time_t now = time(NULL); 512 time_t expire = parse_date(now, arg->val); 513 514 if (now == expire) 515 errx(EX_DATAERR, "invalid account expiry date `%s'", arg->val); 516 if (pwd->pw_expire != expire) { 517 pwd->pw_expire = expire; 518 edited = 1; 519 } 520 } 521 } 522 523 if ((arg = getarg(args, 's')) != NULL) { 524 char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val); 525 if (shell == NULL) 526 shell = ""; 527 if (strcmp(shell, pwd->pw_shell) != 0) { 528 pwd->pw_shell = shell; 529 edited = 1; 530 } 531 } 532 533 if (getarg(args, 'L')) { 534 if (cnf->default_class == NULL) 535 cnf->default_class = ""; 536 if (strcmp(pwd->pw_class, cnf->default_class) != 0) { 537 pwd->pw_class = cnf->default_class; 538 edited = 1; 539 } 540 } 541 542 if ((arg = getarg(args, 'd')) != NULL) { 543 if (strcmp(pwd->pw_dir, arg->val)) 544 edited = 1; 545 if (stat(pwd->pw_dir = arg->val, &st) == -1) { 546 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0) 547 warnx("WARNING: home `%s' does not exist", pwd->pw_dir); 548 } else if (!S_ISDIR(st.st_mode)) 549 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir); 550 } 551 552 if ((arg = getarg(args, 'w')) != NULL && 553 getarg(args, 'h') == NULL && getarg(args, 'H') == NULL) { 554 login_cap_t *lc; 555 556 lc = login_getpwclass(pwd); 557 if (lc == NULL || 558 login_setcryptfmt(lc, "md5", NULL) == NULL) 559 warn("setting crypt(3) format"); 560 login_close(lc); 561 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 562 edited = 1; 563 } 564 565 } else { 566 login_cap_t *lc; 567 568 /* 569 * Add code 570 */ 571 572 if (a_name == NULL) /* Required */ 573 errx(EX_DATAERR, "login name required"); 574 else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */ 575 errx(EX_DATAERR, "login name `%s' already exists", a_name->val); 576 577 /* 578 * Now, set up defaults for a new user 579 */ 580 pwd = &fakeuser; 581 pwd->pw_name = a_name->val; 582 pwd->pw_class = cnf->default_class ? cnf->default_class : ""; 583 pwd->pw_uid = pw_uidpolicy(cnf, args); 584 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid); 585 pwd->pw_change = pw_pwdpolicy(cnf, args); 586 pwd->pw_expire = pw_exppolicy(cnf, args); 587 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name); 588 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL); 589 lc = login_getpwclass(pwd); 590 if (lc == NULL || login_setcryptfmt(lc, "md5", NULL) == NULL) 591 warn("setting crypt(3) format"); 592 login_close(lc); 593 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 594 edited = 1; 595 596 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 597 warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name); 598 } 599 600 /* 601 * Shared add/edit code 602 */ 603 if ((arg = getarg(args, 'c')) != NULL) { 604 char *gecos = pw_checkname((u_char *)arg->val, 1); 605 if (strcmp(pwd->pw_gecos, gecos) != 0) { 606 pwd->pw_gecos = gecos; 607 edited = 1; 608 } 609 } 610 611 if ((arg = getarg(args, 'h')) != NULL || 612 (arg = getarg(args, 'H')) != NULL) { 613 if (strcmp(arg->val, "-") == 0) { 614 if (!pwd->pw_passwd || *pwd->pw_passwd != '*') { 615 pwd->pw_passwd = "*"; /* No access */ 616 edited = 1; 617 } 618 } else { 619 int fd = atoi(arg->val); 620 int precrypt = (arg->ch == 'H'); 621 int b; 622 int istty = isatty(fd); 623 struct termios t; 624 login_cap_t *lc; 625 626 if (istty) { 627 if (tcgetattr(fd, &t) == -1) 628 istty = 0; 629 else { 630 struct termios n = t; 631 632 /* Disable echo */ 633 n.c_lflag &= ~(ECHO); 634 tcsetattr(fd, TCSANOW, &n); 635 printf("%s%spassword for user %s:", 636 (mode == M_UPDATE) ? "new " : "", 637 precrypt ? "encrypted " : "", 638 pwd->pw_name); 639 fflush(stdout); 640 } 641 } 642 b = read(fd, line, sizeof(line) - 1); 643 if (istty) { /* Restore state */ 644 tcsetattr(fd, TCSANOW, &t); 645 fputc('\n', stdout); 646 fflush(stdout); 647 } 648 if (b < 0) { 649 warn("-%c file descriptor", precrypt ? 'H' : 650 'h'); 651 return EX_IOERR; 652 } 653 line[b] = '\0'; 654 if ((p = strpbrk(line, " \t\r\n")) != NULL) 655 *p = '\0'; 656 if (!*line) 657 errx(EX_DATAERR, "empty password read on file descriptor %d", fd); 658 if (precrypt) { 659 if (strchr(line, ':') != NULL) 660 return EX_DATAERR; 661 pwd->pw_passwd = line; 662 } else { 663 lc = login_getpwclass(pwd); 664 if (lc == NULL || 665 login_setcryptfmt(lc, "md5", NULL) == NULL) 666 warn("setting crypt(3) format"); 667 login_close(lc); 668 pwd->pw_passwd = pw_pwcrypt(line); 669 } 670 edited = 1; 671 } 672 } 673 674 /* 675 * Special case: -N only displays & exits 676 */ 677 if (getarg(args, 'N') != NULL) 678 return print_user(pwd, 679 getarg(args, 'P') != NULL, 680 getarg(args, '7') != NULL); 681 682 if (mode == M_ADD) { 683 edited = 1; /* Always */ 684 rc = addpwent(pwd); 685 if (rc == -1) { 686 warnx("user '%s' already exists", pwd->pw_name); 687 return EX_IOERR; 688 } else if (rc != 0) { 689 warn("passwd file update"); 690 return EX_IOERR; 691 } 692 if (cnf->nispasswd && *cnf->nispasswd=='/') { 693 rc = addnispwent(cnf->nispasswd, pwd); 694 if (rc == -1) 695 warnx("User '%s' already exists in NIS passwd", pwd->pw_name); 696 else 697 warn("NIS passwd update"); 698 /* NOTE: we treat NIS-only update errors as non-fatal */ 699 } 700 } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) { 701 if (edited) { /* Only updated this if required */ 702 rc = chgpwent(a_name->val, pwd); 703 if (rc == -1) { 704 warnx("user '%s' does not exist (NIS?)", pwd->pw_name); 705 return EX_IOERR; 706 } else if (rc != 0) { 707 warn("passwd file update"); 708 return EX_IOERR; 709 } 710 if ( cnf->nispasswd && *cnf->nispasswd=='/') { 711 rc = chgnispwent(cnf->nispasswd, a_name->val, pwd); 712 if (rc == -1) 713 warn("User '%s' not found in NIS passwd", pwd->pw_name); 714 else 715 warn("NIS passwd update"); 716 /* NOTE: NIS-only update errors are not fatal */ 717 } 718 } 719 } 720 721 /* 722 * Ok, user is created or changed - now edit group file 723 */ 724 725 if (mode == M_ADD || getarg(args, 'G') != NULL) 726 editgroups(pwd->pw_name, cnf->groups); 727 728 /* go get a current version of pwd */ 729 pwd = GETPWNAM(a_name->val); 730 if (pwd == NULL) { 731 /* This will fail when we rename, so special case that */ 732 if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) { 733 a_name->val = arg->val; /* update new name */ 734 pwd = GETPWNAM(a_name->val); /* refetch renamed rec */ 735 } 736 } 737 if (pwd == NULL) /* can't go on without this */ 738 errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val); 739 740 grp = GETGRGID(pwd->pw_gid); 741 pw_log(cnf, mode, W_USER, "%s(%ld):%s(%ld):%s:%s:%s", 742 pwd->pw_name, (long) pwd->pw_uid, 743 grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1), 744 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 745 746 /* 747 * If adding, let's touch and chown the user's mail file. This is not 748 * strictly necessary under BSD with a 0755 maildir but it also 749 * doesn't hurt anything to create the empty mailfile 750 */ 751 if (mode == M_ADD) { 752 if (!PWALTDIR()) { 753 sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name); 754 close(open(line, O_RDWR | O_CREAT, 0600)); /* Preserve contents & 755 * mtime */ 756 chown(line, pwd->pw_uid, pwd->pw_gid); 757 } 758 } 759 760 /* 761 * Let's create and populate the user's home directory. Note 762 * that this also `works' for editing users if -m is used, but 763 * existing files will *not* be overwritten. 764 */ 765 if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) { 766 copymkdir(pwd->pw_dir, cnf->dotdir, 0755, pwd->pw_uid, pwd->pw_gid); 767 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made", 768 pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir); 769 } 770 771 772 /* 773 * Finally, send mail to the new user as well, if we are asked to 774 */ 775 if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) { 776 FILE *pfp = popen(_PATH_SENDMAIL " -t", "w"); 777 778 if (pfp == NULL) 779 warn("sendmail"); 780 else { 781 fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name); 782 while (fgets(line, sizeof(line), fp) != NULL) { 783 /* Do substitutions? */ 784 fputs(line, pfp); 785 } 786 pclose(pfp); 787 pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent", 788 pwd->pw_name, (long) pwd->pw_uid); 789 } 790 fclose(fp); 791 } 792 793 return EXIT_SUCCESS; 794 } 795 796 797 static uid_t 798 pw_uidpolicy(struct userconf * cnf, struct cargs * args) 799 { 800 struct passwd *pwd; 801 uid_t uid = (uid_t) - 1; 802 struct carg *a_uid = getarg(args, 'u'); 803 804 /* 805 * Check the given uid, if any 806 */ 807 if (a_uid != NULL) { 808 uid = (uid_t) atol(a_uid->val); 809 810 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL) 811 errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid); 812 } else { 813 struct bitmap bm; 814 815 /* 816 * We need to allocate the next available uid under one of 817 * two policies a) Grab the first unused uid b) Grab the 818 * highest possible unused uid 819 */ 820 if (cnf->min_uid >= cnf->max_uid) { /* Sanity 821 * claus^H^H^H^Hheck */ 822 cnf->min_uid = 1000; 823 cnf->max_uid = 32000; 824 } 825 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1); 826 827 /* 828 * Now, let's fill the bitmap from the password file 829 */ 830 SETPWENT(); 831 while ((pwd = GETPWENT()) != NULL) 832 if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid) 833 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid); 834 ENDPWENT(); 835 836 /* 837 * Then apply the policy, with fallback to reuse if necessary 838 */ 839 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid) 840 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid); 841 842 /* 843 * Another sanity check 844 */ 845 if (uid < cnf->min_uid || uid > cnf->max_uid) 846 errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used"); 847 bm_dealloc(&bm); 848 } 849 return uid; 850 } 851 852 853 static uid_t 854 pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer) 855 { 856 struct group *grp; 857 gid_t gid = (uid_t) - 1; 858 struct carg *a_gid = getarg(args, 'g'); 859 860 /* 861 * If no arg given, see if default can help out 862 */ 863 if (a_gid == NULL && cnf->default_group && *cnf->default_group) 864 a_gid = addarg(args, 'g', cnf->default_group); 865 866 /* 867 * Check the given gid, if any 868 */ 869 SETGRENT(); 870 if (a_gid != NULL) { 871 if ((grp = GETGRNAM(a_gid->val)) == NULL) { 872 gid = (gid_t) atol(a_gid->val); 873 if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL) 874 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val); 875 } 876 gid = grp->gr_gid; 877 } else if ((grp = GETGRNAM(nam)) != NULL && grp->gr_mem[0] == NULL) { 878 gid = grp->gr_gid; /* Already created? Use it anyway... */ 879 } else { 880 struct cargs grpargs; 881 char tmp[32]; 882 883 LIST_INIT(&grpargs); 884 addarg(&grpargs, 'n', nam); 885 886 /* 887 * We need to auto-create a group with the user's name. We 888 * can send all the appropriate output to our sister routine 889 * bit first see if we can create a group with gid==uid so we 890 * can keep the user and group ids in sync. We purposely do 891 * NOT check the gid range if we can force the sync. If the 892 * user's name dups an existing group, then the group add 893 * function will happily handle that case for us and exit. 894 */ 895 if (GETGRGID(prefer) == NULL) { 896 sprintf(tmp, "%lu", (unsigned long) prefer); 897 addarg(&grpargs, 'g', tmp); 898 } 899 if (getarg(args, 'N')) 900 { 901 addarg(&grpargs, 'N', NULL); 902 addarg(&grpargs, 'q', NULL); 903 gid = pw_group(cnf, M_NEXT, &grpargs); 904 } 905 else 906 { 907 pw_group(cnf, M_ADD, &grpargs); 908 if ((grp = GETGRNAM(nam)) != NULL) 909 gid = grp->gr_gid; 910 } 911 a_gid = LIST_FIRST(&grpargs); 912 while (a_gid != NULL) { 913 struct carg *t = LIST_NEXT(a_gid, list); 914 LIST_REMOVE(a_gid, list); 915 a_gid = t; 916 } 917 } 918 ENDGRENT(); 919 return gid; 920 } 921 922 923 static time_t 924 pw_pwdpolicy(struct userconf * cnf, struct cargs * args) 925 { 926 time_t result = 0; 927 time_t now = time(NULL); 928 struct carg *arg = getarg(args, 'p'); 929 930 if (arg != NULL) { 931 if ((result = parse_date(now, arg->val)) == now) 932 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 933 } else if (cnf->password_days > 0) 934 result = now + ((long) cnf->password_days * 86400L); 935 return result; 936 } 937 938 939 static time_t 940 pw_exppolicy(struct userconf * cnf, struct cargs * args) 941 { 942 time_t result = 0; 943 time_t now = time(NULL); 944 struct carg *arg = getarg(args, 'e'); 945 946 if (arg != NULL) { 947 if ((result = parse_date(now, arg->val)) == now) 948 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 949 } else if (cnf->expire_days > 0) 950 result = now + ((long) cnf->expire_days * 86400L); 951 return result; 952 } 953 954 955 static char * 956 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user) 957 { 958 struct carg *arg = getarg(args, 'd'); 959 960 if (arg) 961 return arg->val; 962 else { 963 static char home[128]; 964 965 if (cnf->home == NULL || *cnf->home == '\0') 966 errx(EX_CONFIG, "no base home directory set"); 967 sprintf(home, "%s/%s", cnf->home, user); 968 return home; 969 } 970 } 971 972 static char * 973 shell_path(char const * path, char *shells[], char *sh) 974 { 975 if (sh != NULL && (*sh == '/' || *sh == '\0')) 976 return sh; /* specified full path or forced none */ 977 else { 978 char *p; 979 char paths[_UC_MAXLINE]; 980 981 /* 982 * We need to search paths 983 */ 984 strlcpy(paths, path, sizeof(paths)); 985 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) { 986 int i; 987 static char shellpath[256]; 988 989 if (sh != NULL) { 990 sprintf(shellpath, "%s/%s", p, sh); 991 if (access(shellpath, X_OK) == 0) 992 return shellpath; 993 } else 994 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) { 995 sprintf(shellpath, "%s/%s", p, shells[i]); 996 if (access(shellpath, X_OK) == 0) 997 return shellpath; 998 } 999 } 1000 if (sh == NULL) 1001 errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh); 1002 errx(EX_CONFIG, "no default shell available or defined"); 1003 return NULL; 1004 } 1005 } 1006 1007 1008 static char * 1009 pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell) 1010 { 1011 char *sh = newshell; 1012 struct carg *arg = getarg(args, 's'); 1013 1014 if (newshell == NULL && arg != NULL) 1015 sh = arg->val; 1016 return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default); 1017 } 1018 1019 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ."; 1020 1021 char * 1022 pw_pwcrypt(char *password) 1023 { 1024 int i; 1025 char salt[12]; 1026 1027 static char buf[256]; 1028 1029 /* 1030 * Calculate a salt value 1031 */ 1032 for (i = 0; i < 8; i++) 1033 salt[i] = chars[arc4random() % 63]; 1034 salt[i] = '\0'; 1035 1036 return strcpy(buf, crypt(password, salt)); 1037 } 1038 1039 #if defined(USE_MD5RAND) 1040 u_char * 1041 pw_getrand(u_char *buf, int len) /* cryptographically secure rng */ 1042 { 1043 int i; 1044 for (i=0;i<len;i+=16) { 1045 u_char ubuf[16]; 1046 1047 MD5_CTX md5_ctx; 1048 struct timeval tv, tvo; 1049 struct rusage ru; 1050 int n=0; 1051 int t; 1052 1053 MD5Init (&md5_ctx); 1054 t=getpid(); 1055 MD5Update (&md5_ctx, (u_char*)&t, sizeof t); 1056 t=getppid(); 1057 MD5Update (&md5_ctx, (u_char*)&t, sizeof t); 1058 gettimeofday (&tvo, NULL); 1059 do { 1060 getrusage (RUSAGE_SELF, &ru); 1061 MD5Update (&md5_ctx, (u_char*)&ru, sizeof ru); 1062 gettimeofday (&tv, NULL); 1063 MD5Update (&md5_ctx, (u_char*)&tv, sizeof tv); 1064 } while (n++<20 || tv.tv_usec-tvo.tv_usec<100*1000); 1065 MD5Final (ubuf, &md5_ctx); 1066 memcpy(buf+i, ubuf, MIN(16, len-i)); 1067 } 1068 return buf; 1069 } 1070 1071 #else /* Portable version */ 1072 1073 static u_char * 1074 pw_getrand(u_char *buf, int len) 1075 { 1076 int i; 1077 1078 for (i = 0; i < len; i++) { 1079 unsigned long val = arc4random(); 1080 /* Use all bits in the random value */ 1081 buf[i]=(u_char)((val >> 24) ^ (val >> 16) ^ (val >> 8) ^ val); 1082 } 1083 return buf; 1084 } 1085 1086 #endif 1087 1088 static char * 1089 pw_password(struct userconf * cnf, struct cargs * args, char const * user) 1090 { 1091 int i, l; 1092 char pwbuf[32]; 1093 u_char rndbuf[sizeof pwbuf]; 1094 1095 switch (cnf->default_password) { 1096 case -1: /* Random password */ 1097 l = (arc4random() % 8 + 8); /* 8 - 16 chars */ 1098 pw_getrand(rndbuf, l); 1099 for (i = 0; i < l; i++) 1100 pwbuf[i] = chars[rndbuf[i] % (sizeof(chars)-1)]; 1101 pwbuf[i] = '\0'; 1102 1103 /* 1104 * We give this information back to the user 1105 */ 1106 if (getarg(args, 'h') == NULL && getarg(args, 'H') == NULL && 1107 getarg(args, 'N') == NULL) { 1108 if (isatty(STDOUT_FILENO)) 1109 printf("Password for '%s' is: ", user); 1110 printf("%s\n", pwbuf); 1111 fflush(stdout); 1112 } 1113 break; 1114 1115 case -2: /* No password at all! */ 1116 return ""; 1117 1118 case 0: /* No login - default */ 1119 default: 1120 return "*"; 1121 1122 case 1: /* user's name */ 1123 strlcpy(pwbuf, user, sizeof(pwbuf)); 1124 break; 1125 } 1126 return pw_pwcrypt(pwbuf); 1127 } 1128 1129 1130 static int 1131 print_user(struct passwd * pwd, int pretty, int v7) 1132 { 1133 if (!pretty) { 1134 char buf[_UC_MAXLINE]; 1135 1136 fmtpwentry(buf, pwd, v7 ? PWF_PASSWD : PWF_STANDARD); 1137 fputs(buf, stdout); 1138 } else { 1139 int j; 1140 char *p; 1141 struct group *grp = GETGRGID(pwd->pw_gid); 1142 char uname[60] = "User &", office[60] = "[None]", 1143 wphone[60] = "[None]", hphone[60] = "[None]"; 1144 char acexpire[32] = "[None]", pwexpire[32] = "[None]"; 1145 struct tm * tptr; 1146 1147 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) { 1148 strlcpy(uname, p, sizeof(uname)); 1149 if ((p = strtok(NULL, ",")) != NULL) { 1150 strlcpy(office, p, sizeof(office)); 1151 if ((p = strtok(NULL, ",")) != NULL) { 1152 strlcpy(wphone, p, sizeof(wphone)); 1153 if ((p = strtok(NULL, "")) != NULL) { 1154 strlcpy(hphone, p, 1155 sizeof(hphone)); 1156 } 1157 } 1158 } 1159 } 1160 /* 1161 * Handle '&' in gecos field 1162 */ 1163 if ((p = strchr(uname, '&')) != NULL) { 1164 int l = strlen(pwd->pw_name); 1165 int m = strlen(p); 1166 1167 memmove(p + l, p + 1, m); 1168 memmove(p, pwd->pw_name, l); 1169 *p = (char) toupper((unsigned char)*p); 1170 } 1171 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL) 1172 strftime(acexpire, sizeof acexpire, "%c", tptr); 1173 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL) 1174 strftime(pwexpire, sizeof pwexpire, "%c", tptr); 1175 printf("Login Name: %-15s #%-12ld Group: %-15s #%ld\n" 1176 " Full Name: %s\n" 1177 " Home: %-26.26s Class: %s\n" 1178 " Shell: %-26.26s Office: %s\n" 1179 "Work Phone: %-26.26s Home Phone: %s\n" 1180 "Acc Expire: %-26.26s Pwd Expire: %s\n", 1181 pwd->pw_name, (long) pwd->pw_uid, 1182 grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid, 1183 uname, pwd->pw_dir, pwd->pw_class, 1184 pwd->pw_shell, office, wphone, hphone, 1185 acexpire, pwexpire); 1186 SETGRENT(); 1187 j = 0; 1188 while ((grp=GETGRENT()) != NULL) 1189 { 1190 int i = 0; 1191 while (grp->gr_mem[i] != NULL) 1192 { 1193 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) 1194 { 1195 printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name); 1196 break; 1197 } 1198 ++i; 1199 } 1200 } 1201 ENDGRENT(); 1202 printf("%s", j ? "\n" : ""); 1203 } 1204 return EXIT_SUCCESS; 1205 } 1206 1207 char * 1208 pw_checkname(u_char *name, int gecos) 1209 { 1210 char showch[8]; 1211 u_char const *badchars, *ch, *showtype; 1212 int reject; 1213 1214 ch = name; 1215 reject = 0; 1216 if (gecos) { 1217 /* See if the name is valid as a gecos (comment) field. */ 1218 badchars = ":!@"; 1219 showtype = "gecos field"; 1220 } else { 1221 /* See if the name is valid as a userid or group. */ 1222 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\""; 1223 showtype = "userid/group name"; 1224 /* Userids and groups can not have a leading '-'. */ 1225 if (*ch == '-') 1226 reject = 1; 1227 } 1228 if (!reject) { 1229 while (*ch) { 1230 if (strchr(badchars, *ch) != NULL || *ch < ' ' || 1231 *ch == 127) { 1232 reject = 1; 1233 break; 1234 } 1235 /* 8-bit characters are only allowed in GECOS fields */ 1236 if (!gecos && (*ch & 0x80)) { 1237 reject = 1; 1238 break; 1239 } 1240 ch++; 1241 } 1242 } 1243 /* 1244 * A `$' is allowed as the final character for userids and groups, 1245 * mainly for the benefit of samba. 1246 */ 1247 if (reject && !gecos) { 1248 if (*ch == '$' && *(ch + 1) == '\0') { 1249 reject = 0; 1250 ch++; 1251 } 1252 } 1253 if (reject) { 1254 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127) 1255 ? "`%c'" : "0x%02x", *ch); 1256 errx(EX_DATAERR, "invalid character %s at position %d in %s", 1257 showch, (ch - name), showtype); 1258 } 1259 if (!gecos && (ch - name) > LOGNAMESIZE) 1260 errx(EX_DATAERR, "name too long `%s' (max is %d)", name, 1261 LOGNAMESIZE); 1262 return (char *)name; 1263 } 1264 1265 1266 static void 1267 rmat(uid_t uid) 1268 { 1269 DIR *d = opendir("/var/at/jobs"); 1270 1271 if (d != NULL) { 1272 struct dirent *e; 1273 1274 while ((e = readdir(d)) != NULL) { 1275 struct stat st; 1276 1277 if (strncmp(e->d_name, ".lock", 5) != 0 && 1278 stat(e->d_name, &st) == 0 && 1279 !S_ISDIR(st.st_mode) && 1280 st.st_uid == uid) { 1281 char tmp[MAXPATHLEN]; 1282 1283 sprintf(tmp, "/usr/bin/atrm %s", e->d_name); 1284 system(tmp); 1285 } 1286 } 1287 closedir(d); 1288 } 1289 } 1290 1291 static void 1292 rmopie(char const * name) 1293 { 1294 static const char etcopie[] = "/etc/opiekeys"; 1295 FILE *fp = fopen(etcopie, "r+"); 1296 1297 if (fp != NULL) { 1298 char tmp[1024]; 1299 off_t atofs = 0; 1300 int length = strlen(name); 1301 1302 while (fgets(tmp, sizeof tmp, fp) != NULL) { 1303 if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') { 1304 if (fseek(fp, atofs, SEEK_SET) == 0) { 1305 fwrite("#", 1, 1, fp); /* Comment username out */ 1306 } 1307 break; 1308 } 1309 atofs = ftell(fp); 1310 } 1311 /* 1312 * If we got an error of any sort, don't update! 1313 */ 1314 fclose(fp); 1315 } 1316 } 1317 1318