pw_user.c revision 262865
1113400Sru/*- 2113400Sru * Copyright (C) 1996 3113400Sru * David L. Nugent. All rights reserved. 4113400Sru * 5113400Sru * Redistribution and use in source and binary forms, with or without 6113400Sru * 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 262865 2014-03-06 19:58:03Z julian $"; 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 <login_cap.h> 45#include <pwd.h> 46#include <grp.h> 47#include <libutil.h> 48#include "pw.h" 49#include "bitmap.h" 50 51#define LOGNAMESIZE (MAXLOGNAME-1) 52 53static char locked_str[] = "*LOCKED*"; 54 55static int print_user(struct passwd * pwd, int pretty, int v7); 56static uid_t pw_uidpolicy(struct userconf * cnf, struct cargs * args); 57static uid_t pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer); 58static time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args); 59static time_t pw_exppolicy(struct userconf * cnf, struct cargs * args); 60static char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user); 61static char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell); 62static char *pw_password(struct userconf * cnf, struct cargs * args, char const * user); 63static char *shell_path(char const * path, char *shells[], char *sh); 64static void rmat(uid_t uid); 65static void rmopie(char const * name); 66 67/*- 68 * -C config configuration file 69 * -q quiet operation 70 * -n name login name 71 * -u uid user id 72 * -c comment user name/comment 73 * -d directory home directory 74 * -e date account expiry date 75 * -p date password expiry date 76 * -g grp primary group 77 * -G grp1,grp2 additional groups 78 * -m [ -k dir ] create and set up home 79 * -s shell name of login shell 80 * -o duplicate uid ok 81 * -L class user class 82 * -l name new login name 83 * -h fd password filehandle 84 * -H fd encrypted password filehandle 85 * -F force print or add 86 * Setting defaults: 87 * -D set user defaults 88 * -b dir default home root dir 89 * -e period default expiry period 90 * -p period default password change period 91 * -g group default group 92 * -G grp1,grp2.. default additional groups 93 * -L class default login class 94 * -k dir default home skeleton 95 * -s shell default shell 96 * -w method default password method 97 */ 98 99int 100pw_user(struct userconf * cnf, int mode, struct cargs * args) 101{ 102 int rc, edited = 0; 103 char *p = NULL; 104 char *passtmp; 105 struct carg *a_name; 106 struct carg *a_uid; 107 struct carg *arg; 108 struct passwd *pwd = NULL; 109 struct group *grp; 110 struct stat st; 111 char line[_PASSWORD_LEN+1]; 112 FILE *fp; 113 char *dmode_c; 114 void *set = NULL; 115 116 static struct passwd fakeuser = 117 { 118 NULL, 119 "*", 120 -1, 121 -1, 122 0, 123 "", 124 "User &", 125 "/nonexistent", 126 "/bin/sh", 127 0 128#if defined(__FreeBSD__) 129 ,0 130#endif 131 }; 132 133 134 /* 135 * With M_NEXT, we only need to return the 136 * next uid to stdout 137 */ 138 if (mode == M_NEXT) 139 { 140 uid_t next = pw_uidpolicy(cnf, args); 141 if (getarg(args, 'q')) 142 return next; 143 printf("%ld:", (long)next); 144 pw_group(cnf, mode, args); 145 return EXIT_SUCCESS; 146 } 147 148 /* 149 * We can do all of the common legwork here 150 */ 151 152 if ((arg = getarg(args, 'b')) != NULL) { 153 cnf->home = arg->val; 154 } 155 156 if ((arg = getarg(args, 'M')) != NULL) { 157 dmode_c = arg->val; 158 if ((set = setmode(dmode_c)) == NULL) 159 errx(EX_DATAERR, "invalid directory creation mode '%s'", 160 dmode_c); 161 cnf->homemode = getmode(set, _DEF_DIRMODE); 162 free(set); 163 } 164 165 /* 166 * If we'll need to use it or we're updating it, 167 * then create the base home directory if necessary 168 */ 169 if (arg != NULL || getarg(args, 'm') != NULL) { 170 int l = strlen(cnf->home); 171 172 if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */ 173 cnf->home[--l] = '\0'; 174 175 if (l < 2 || *cnf->home != '/') /* Check for absolute path name */ 176 errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home); 177 178 if (stat(cnf->home, &st) == -1) { 179 char dbuf[MAXPATHLEN]; 180 181 /* 182 * This is a kludge especially for Joerg :) 183 * If the home directory would be created in the root partition, then 184 * we really create it under /usr which is likely to have more space. 185 * But we create a symlink from cnf->home -> "/usr" -> cnf->home 186 */ 187 if (strchr(cnf->home+1, '/') == NULL) { 188 strcpy(dbuf, "/usr"); 189 strncat(dbuf, cnf->home, MAXPATHLEN-5); 190 if (mkdir(dbuf, _DEF_DIRMODE) != -1 || errno == EEXIST) { 191 chown(dbuf, 0, 0); 192 /* 193 * Skip first "/" and create symlink: 194 * /home -> usr/home 195 */ 196 symlink(dbuf+1, cnf->home); 197 } 198 /* If this falls, fall back to old method */ 199 } 200 strlcpy(dbuf, cnf->home, sizeof(dbuf)); 201 p = dbuf; 202 if (stat(dbuf, &st) == -1) { 203 while ((p = strchr(p + 1, '/')) != NULL) { 204 *p = '\0'; 205 if (stat(dbuf, &st) == -1) { 206 if (mkdir(dbuf, _DEF_DIRMODE) == -1) 207 goto direrr; 208 chown(dbuf, 0, 0); 209 } else if (!S_ISDIR(st.st_mode)) 210 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf); 211 *p = '/'; 212 } 213 } 214 if (stat(dbuf, &st) == -1) { 215 if (mkdir(dbuf, _DEF_DIRMODE) == -1) { 216 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf); 217 } 218 chown(dbuf, 0, 0); 219 } 220 } else if (!S_ISDIR(st.st_mode)) 221 errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home); 222 } 223 224 if ((arg = getarg(args, 'e')) != NULL) 225 cnf->expire_days = atoi(arg->val); 226 227 if ((arg = getarg(args, 'y')) != NULL) 228 cnf->nispasswd = arg->val; 229 230 if ((arg = getarg(args, 'p')) != NULL && arg->val) 231 cnf->password_days = atoi(arg->val); 232 233 if ((arg = getarg(args, 'g')) != NULL) { 234 if (!*(p = arg->val)) /* Handle empty group list specially */ 235 cnf->default_group = ""; 236 else { 237 if ((grp = GETGRNAM(p)) == NULL) { 238 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 239 errx(EX_NOUSER, "group `%s' does not exist", p); 240 } 241 cnf->default_group = newstr(grp->gr_name); 242 } 243 } 244 if ((arg = getarg(args, 'L')) != NULL) 245 cnf->default_class = pw_checkname((u_char *)arg->val, 0); 246 247 if ((arg = getarg(args, 'G')) != NULL && arg->val) { 248 int i = 0; 249 250 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) { 251 if ((grp = GETGRNAM(p)) == NULL) { 252 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 253 errx(EX_NOUSER, "group `%s' does not exist", p); 254 } 255 if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1) 256 cnf->groups[i++] = newstr(grp->gr_name); 257 } 258 while (i < cnf->numgroups) 259 cnf->groups[i++] = NULL; 260 } 261 262 if ((arg = getarg(args, 'k')) != NULL) { 263 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode)) 264 errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir); 265 } 266 267 if ((arg = getarg(args, 's')) != NULL) 268 cnf->shell_default = arg->val; 269 270 if ((arg = getarg(args, 'w')) != NULL) 271 cnf->default_password = boolean_val(arg->val, cnf->default_password); 272 if (mode == M_ADD && getarg(args, 'D')) { 273 if (getarg(args, 'n') != NULL) 274 errx(EX_DATAERR, "can't combine `-D' with `-n name'"); 275 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 276 if ((cnf->min_uid = (uid_t) atoi(p)) == 0) 277 cnf->min_uid = 1000; 278 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid) 279 cnf->max_uid = 32000; 280 } 281 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 282 if ((cnf->min_gid = (gid_t) atoi(p)) == 0) 283 cnf->min_gid = 1000; 284 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid) 285 cnf->max_gid = 32000; 286 } 287 288 arg = getarg(args, 'C'); 289 if (write_userconfig(arg ? arg->val : NULL)) 290 return EXIT_SUCCESS; 291 warn("config update"); 292 return EX_IOERR; 293 } 294 295 if (mode == M_PRINT && getarg(args, 'a')) { 296 int pretty = getarg(args, 'P') != NULL; 297 int v7 = getarg(args, '7') != NULL; 298 SETPWENT(); 299 while ((pwd = GETPWENT()) != NULL) 300 print_user(pwd, pretty, v7); 301 ENDPWENT(); 302 return EXIT_SUCCESS; 303 } 304 305 if ((a_name = getarg(args, 'n')) != NULL) 306 pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0)); 307 a_uid = getarg(args, 'u'); 308 309 if (a_uid == NULL) { 310 if (a_name == NULL) 311 errx(EX_DATAERR, "user name or id required"); 312 313 /* 314 * Determine whether 'n' switch is name or uid - we don't 315 * really don't really care which we have, but we need to 316 * know. 317 */ 318 if (mode != M_ADD && pwd == NULL 319 && strspn(a_name->val, "0123456789") == strlen(a_name->val) 320 && *a_name->val) { 321 (a_uid = a_name)->ch = 'u'; 322 a_name = NULL; 323 } 324 } 325 326 /* 327 * Update, delete & print require that the user exists 328 */ 329 if (mode == M_UPDATE || mode == M_DELETE || 330 mode == M_PRINT || mode == M_LOCK || mode == M_UNLOCK) { 331 332 if (a_name == NULL && pwd == NULL) /* Try harder */ 333 pwd = GETPWUID(atoi(a_uid->val)); 334 335 if (pwd == NULL) { 336 if (mode == M_PRINT && getarg(args, 'F')) { 337 fakeuser.pw_name = a_name ? a_name->val : "nouser"; 338 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1; 339 return print_user(&fakeuser, 340 getarg(args, 'P') != NULL, 341 getarg(args, '7') != NULL); 342 } 343 if (a_name == NULL) 344 errx(EX_NOUSER, "no such uid `%s'", a_uid->val); 345 errx(EX_NOUSER, "no such user `%s'", a_name->val); 346 } 347 348 if (a_name == NULL) /* May be needed later */ 349 a_name = addarg(args, 'n', newstr(pwd->pw_name)); 350 351 /* 352 * The M_LOCK and M_UNLOCK functions simply add or remove 353 * a "*LOCKED*" prefix from in front of the password to 354 * prevent it decoding correctly, and therefore prevents 355 * access. Of course, this only prevents access via 356 * password authentication (not ssh, kerberos or any 357 * other method that does not use the UNIX password) but 358 * that is a known limitation. 359 */ 360 361 if (mode == M_LOCK) { 362 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0) 363 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name); 364 passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str)); 365 if (passtmp == NULL) /* disaster */ 366 errx(EX_UNAVAILABLE, "out of memory"); 367 strcpy(passtmp, locked_str); 368 strcat(passtmp, pwd->pw_passwd); 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 /* 378 * Handle deletions now 379 */ 380 char file[MAXPATHLEN]; 381 char home[MAXPATHLEN]; 382 uid_t uid = pwd->pw_uid; 383 384 if (strcmp(pwd->pw_name, "root") == 0) 385 errx(EX_DATAERR, "cannot remove user 'root'"); 386 387 if (!PWALTDIR()) { 388 /* 389 * Remove opie record from /etc/opiekeys 390 */ 391 392 rmopie(pwd->pw_name); 393 394 /* 395 * Remove crontabs 396 */ 397 snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name); 398 if (access(file, F_OK) == 0) { 399 sprintf(file, "crontab -u %s -r", pwd->pw_name); 400 system(file); 401 } 402 } 403 /* 404 * Save these for later, since contents of pwd may be 405 * invalidated by deletion 406 */ 407 sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name); 408 strlcpy(home, pwd->pw_dir, sizeof(home)); 409 410 rc = delpwent(pwd); 411 if (rc == -1) 412 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name); 413 else if (rc != 0) { 414 warn("passwd update"); 415 return EX_IOERR; 416 } 417 418 if (cnf->nispasswd && *cnf->nispasswd=='/') { 419 rc = delnispwent(cnf->nispasswd, a_name->val); 420 if (rc == -1) 421 warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name); 422 else if (rc != 0) 423 warn("WARNING: NIS passwd update"); 424 /* non-fatal */ 425 } 426 427 grp = GETGRNAM(a_name->val); 428 if (grp != NULL && 429 (grp->gr_mem == NULL || *grp->gr_mem == NULL)) 430 delgrent(GETGRNAM(a_name->val)); 431 SETGRENT(); 432 while ((grp = GETGRENT()) != NULL) { 433 int i; 434 char group[MAXLOGNAME]; 435 if (grp->gr_mem != NULL) { 436 for (i = 0; grp->gr_mem[i] != NULL; i++) { 437 if (!strcmp(grp->gr_mem[i], a_name->val)) { 438 while (grp->gr_mem[i] != NULL) { 439 grp->gr_mem[i] = grp->gr_mem[i+1]; 440 } 441 strlcpy(group, grp->gr_name, MAXLOGNAME); 442 chggrent(group, grp); 443 } 444 } 445 } 446 } 447 ENDGRENT(); 448 449 pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid); 450 451 if (!PWALTDIR()) { 452 /* 453 * Remove mail file 454 */ 455 remove(file); 456 457 /* 458 * Remove at jobs 459 */ 460 if (getpwuid(uid) == NULL) 461 rmat(uid); 462 463 /* 464 * Remove home directory and contents 465 */ 466 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) { 467 if (stat(home, &st) != -1) { 468 rm_r(home, uid); 469 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved", 470 a_name->val, (long) uid, home, 471 stat(home, &st) == -1 ? "" : "not completely "); 472 } 473 } 474 } 475 return EXIT_SUCCESS; 476 } else if (mode == M_PRINT) 477 return print_user(pwd, 478 getarg(args, 'P') != NULL, 479 getarg(args, '7') != NULL); 480 481 /* 482 * The rest is edit code 483 */ 484 if ((arg = getarg(args, 'l')) != NULL) { 485 if (strcmp(pwd->pw_name, "root") == 0) 486 errx(EX_DATAERR, "can't rename `root' account"); 487 pwd->pw_name = pw_checkname((u_char *)arg->val, 0); 488 edited = 1; 489 } 490 491 if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) { 492 pwd->pw_uid = (uid_t) atol(arg->val); 493 edited = 1; 494 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0) 495 errx(EX_DATAERR, "can't change uid of `root' account"); 496 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 497 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name); 498 } 499 500 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) { /* Already checked this */ 501 gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid; 502 if (newgid != pwd->pw_gid) { 503 edited = 1; 504 pwd->pw_gid = newgid; 505 } 506 } 507 508 if ((arg = getarg(args, 'p')) != NULL) { 509 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 510 if (pwd->pw_change != 0) { 511 pwd->pw_change = 0; 512 edited = 1; 513 } 514 } 515 else { 516 time_t now = time(NULL); 517 time_t expire = parse_date(now, arg->val); 518 519 if (pwd->pw_change != expire) { 520 pwd->pw_change = expire; 521 edited = 1; 522 } 523 } 524 } 525 526 if ((arg = getarg(args, 'e')) != NULL) { 527 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 528 if (pwd->pw_expire != 0) { 529 pwd->pw_expire = 0; 530 edited = 1; 531 } 532 } 533 else { 534 time_t now = time(NULL); 535 time_t expire = parse_date(now, arg->val); 536 537 if (pwd->pw_expire != expire) { 538 pwd->pw_expire = expire; 539 edited = 1; 540 } 541 } 542 } 543 544 if ((arg = getarg(args, 's')) != NULL) { 545 char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val); 546 if (shell == NULL) 547 shell = ""; 548 if (strcmp(shell, pwd->pw_shell) != 0) { 549 pwd->pw_shell = shell; 550 edited = 1; 551 } 552 } 553 554 if (getarg(args, 'L')) { 555 if (cnf->default_class == NULL) 556 cnf->default_class = ""; 557 if (strcmp(pwd->pw_class, cnf->default_class) != 0) { 558 pwd->pw_class = cnf->default_class; 559 edited = 1; 560 } 561 } 562 563 if ((arg = getarg(args, 'd')) != NULL) { 564 if (strcmp(pwd->pw_dir, arg->val)) 565 edited = 1; 566 if (stat(pwd->pw_dir = arg->val, &st) == -1) { 567 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0) 568 warnx("WARNING: home `%s' does not exist", pwd->pw_dir); 569 } else if (!S_ISDIR(st.st_mode)) 570 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir); 571 } 572 573 if ((arg = getarg(args, 'w')) != NULL && 574 getarg(args, 'h') == NULL && getarg(args, 'H') == NULL) { 575 login_cap_t *lc; 576 577 lc = login_getpwclass(pwd); 578 if (lc == NULL || 579 login_setcryptfmt(lc, "sha512", NULL) == NULL) 580 warn("setting crypt(3) format"); 581 login_close(lc); 582 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 583 edited = 1; 584 } 585 586 } else { 587 login_cap_t *lc; 588 589 /* 590 * Add code 591 */ 592 593 if (a_name == NULL) /* Required */ 594 errx(EX_DATAERR, "login name required"); 595 else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */ 596 errx(EX_DATAERR, "login name `%s' already exists", a_name->val); 597 598 /* 599 * Now, set up defaults for a new user 600 */ 601 pwd = &fakeuser; 602 pwd->pw_name = a_name->val; 603 pwd->pw_class = cnf->default_class ? cnf->default_class : ""; 604 pwd->pw_uid = pw_uidpolicy(cnf, args); 605 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid); 606 pwd->pw_change = pw_pwdpolicy(cnf, args); 607 pwd->pw_expire = pw_exppolicy(cnf, args); 608 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name); 609 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL); 610 lc = login_getpwclass(pwd); 611 if (lc == NULL || login_setcryptfmt(lc, "md5", NULL) == NULL) 612 warn("setting crypt(3) format"); 613 login_close(lc); 614 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 615 edited = 1; 616 617 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 618 warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name); 619 } 620 621 /* 622 * Shared add/edit code 623 */ 624 if ((arg = getarg(args, 'c')) != NULL) { 625 char *gecos = pw_checkname((u_char *)arg->val, 1); 626 if (strcmp(pwd->pw_gecos, gecos) != 0) { 627 pwd->pw_gecos = gecos; 628 edited = 1; 629 } 630 } 631 632 if ((arg = getarg(args, 'h')) != NULL || 633 (arg = getarg(args, 'H')) != NULL) { 634 if (strcmp(arg->val, "-") == 0) { 635 if (!pwd->pw_passwd || *pwd->pw_passwd != '*') { 636 pwd->pw_passwd = "*"; /* No access */ 637 edited = 1; 638 } 639 } else { 640 int fd = atoi(arg->val); 641 int precrypt = (arg->ch == 'H'); 642 int b; 643 int istty = isatty(fd); 644 struct termios t; 645 login_cap_t *lc; 646 647 if (istty) { 648 if (tcgetattr(fd, &t) == -1) 649 istty = 0; 650 else { 651 struct termios n = t; 652 653 /* Disable echo */ 654 n.c_lflag &= ~(ECHO); 655 tcsetattr(fd, TCSANOW, &n); 656 printf("%s%spassword for user %s:", 657 (mode == M_UPDATE) ? "new " : "", 658 precrypt ? "encrypted " : "", 659 pwd->pw_name); 660 fflush(stdout); 661 } 662 } 663 b = read(fd, line, sizeof(line) - 1); 664 if (istty) { /* Restore state */ 665 tcsetattr(fd, TCSANOW, &t); 666 fputc('\n', stdout); 667 fflush(stdout); 668 } 669 if (b < 0) { 670 warn("-%c file descriptor", precrypt ? 'H' : 671 'h'); 672 return EX_IOERR; 673 } 674 line[b] = '\0'; 675 if ((p = strpbrk(line, "\r\n")) != NULL) 676 *p = '\0'; 677 if (!*line) 678 errx(EX_DATAERR, "empty password read on file descriptor %d", fd); 679 if (precrypt) { 680 if (strchr(line, ':') != NULL) 681 return EX_DATAERR; 682 pwd->pw_passwd = line; 683 } else { 684 lc = login_getpwclass(pwd); 685 if (lc == NULL || 686 login_setcryptfmt(lc, "md5", NULL) == NULL) 687 warn("setting crypt(3) format"); 688 login_close(lc); 689 pwd->pw_passwd = pw_pwcrypt(line); 690 } 691 edited = 1; 692 } 693 } 694 695 /* 696 * Special case: -N only displays & exits 697 */ 698 if (getarg(args, 'N') != NULL) 699 return print_user(pwd, 700 getarg(args, 'P') != NULL, 701 getarg(args, '7') != NULL); 702 703 if (mode == M_ADD) { 704 edited = 1; /* Always */ 705 rc = addpwent(pwd); 706 if (rc == -1) { 707 warnx("user '%s' already exists", pwd->pw_name); 708 return EX_IOERR; 709 } else if (rc != 0) { 710 warn("passwd file update"); 711 return EX_IOERR; 712 } 713 if (cnf->nispasswd && *cnf->nispasswd=='/') { 714 rc = addnispwent(cnf->nispasswd, pwd); 715 if (rc == -1) 716 warnx("User '%s' already exists in NIS passwd", pwd->pw_name); 717 else 718 warn("NIS passwd update"); 719 /* NOTE: we treat NIS-only update errors as non-fatal */ 720 } 721 } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) { 722 if (edited) { /* Only updated this if required */ 723 rc = chgpwent(a_name->val, pwd); 724 if (rc == -1) { 725 warnx("user '%s' does not exist (NIS?)", pwd->pw_name); 726 return EX_IOERR; 727 } else if (rc != 0) { 728 warn("passwd file update"); 729 return EX_IOERR; 730 } 731 if ( cnf->nispasswd && *cnf->nispasswd=='/') { 732 rc = chgnispwent(cnf->nispasswd, a_name->val, pwd); 733 if (rc == -1) 734 warn("User '%s' not found in NIS passwd", pwd->pw_name); 735 else 736 warn("NIS passwd update"); 737 /* NOTE: NIS-only update errors are not fatal */ 738 } 739 } 740 } 741 742 /* 743 * Ok, user is created or changed - now edit group file 744 */ 745 746 if (mode == M_ADD || getarg(args, 'G') != NULL) { 747 int i; 748 for (i = 0; cnf->groups[i] != NULL; i++) { 749 grp = GETGRNAM(cnf->groups[i]); 750 grp = gr_add(grp, pwd->pw_name); 751 /* 752 * grp can only be NULL in 2 cases: 753 * - the new member is already a member 754 * - a problem with memory occurs 755 * in both cases we want to skip now. 756 */ 757 if (grp == NULL) 758 continue; 759 chggrent(cnf->groups[i], grp); 760 free(grp); 761 } 762 } 763 764 765 /* go get a current version of pwd */ 766 pwd = GETPWNAM(a_name->val); 767 if (pwd == NULL) { 768 /* This will fail when we rename, so special case that */ 769 if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) { 770 a_name->val = arg->val; /* update new name */ 771 pwd = GETPWNAM(a_name->val); /* refetch renamed rec */ 772 } 773 } 774 if (pwd == NULL) /* can't go on without this */ 775 errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val); 776 777 grp = GETGRGID(pwd->pw_gid); 778 pw_log(cnf, mode, W_USER, "%s(%ld):%s(%ld):%s:%s:%s", 779 pwd->pw_name, (long) pwd->pw_uid, 780 grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1), 781 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 782 783 /* 784 * If adding, let's touch and chown the user's mail file. This is not 785 * strictly necessary under BSD with a 0755 maildir but it also 786 * doesn't hurt anything to create the empty mailfile 787 */ 788 if (mode == M_ADD) { 789 if (!PWALTDIR()) { 790 sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name); 791 close(open(line, O_RDWR | O_CREAT, 0600)); /* Preserve contents & 792 * mtime */ 793 chown(line, pwd->pw_uid, pwd->pw_gid); 794 } 795 } 796 797 /* 798 * Let's create and populate the user's home directory. Note 799 * that this also `works' for editing users if -m is used, but 800 * existing files will *not* be overwritten. 801 */ 802 if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) { 803 copymkdir(pwd->pw_dir, cnf->dotdir, cnf->homemode, pwd->pw_uid, pwd->pw_gid); 804 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made", 805 pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir); 806 } 807 808 809 /* 810 * Finally, send mail to the new user as well, if we are asked to 811 */ 812 if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) { 813 FILE *pfp = popen(_PATH_SENDMAIL " -t", "w"); 814 815 if (pfp == NULL) 816 warn("sendmail"); 817 else { 818 fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name); 819 while (fgets(line, sizeof(line), fp) != NULL) { 820 /* Do substitutions? */ 821 fputs(line, pfp); 822 } 823 pclose(pfp); 824 pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent", 825 pwd->pw_name, (long) pwd->pw_uid); 826 } 827 fclose(fp); 828 } 829 830 return EXIT_SUCCESS; 831} 832 833 834static uid_t 835pw_uidpolicy(struct userconf * cnf, struct cargs * args) 836{ 837 struct passwd *pwd; 838 uid_t uid = (uid_t) - 1; 839 struct carg *a_uid = getarg(args, 'u'); 840 841 /* 842 * Check the given uid, if any 843 */ 844 if (a_uid != NULL) { 845 uid = (uid_t) atol(a_uid->val); 846 847 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL) 848 errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid); 849 } else { 850 struct bitmap bm; 851 852 /* 853 * We need to allocate the next available uid under one of 854 * two policies a) Grab the first unused uid b) Grab the 855 * highest possible unused uid 856 */ 857 if (cnf->min_uid >= cnf->max_uid) { /* Sanity 858 * claus^H^H^H^Hheck */ 859 cnf->min_uid = 1000; 860 cnf->max_uid = 32000; 861 } 862 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1); 863 864 /* 865 * Now, let's fill the bitmap from the password file 866 */ 867 SETPWENT(); 868 while ((pwd = GETPWENT()) != NULL) 869 if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid) 870 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid); 871 ENDPWENT(); 872 873 /* 874 * Then apply the policy, with fallback to reuse if necessary 875 */ 876 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid) 877 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid); 878 879 /* 880 * Another sanity check 881 */ 882 if (uid < cnf->min_uid || uid > cnf->max_uid) 883 errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used"); 884 bm_dealloc(&bm); 885 } 886 return uid; 887} 888 889 890static uid_t 891pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer) 892{ 893 struct group *grp; 894 gid_t gid = (uid_t) - 1; 895 struct carg *a_gid = getarg(args, 'g'); 896 897 /* 898 * If no arg given, see if default can help out 899 */ 900 if (a_gid == NULL && cnf->default_group && *cnf->default_group) 901 a_gid = addarg(args, 'g', cnf->default_group); 902 903 /* 904 * Check the given gid, if any 905 */ 906 SETGRENT(); 907 if (a_gid != NULL) { 908 if ((grp = GETGRNAM(a_gid->val)) == NULL) { 909 gid = (gid_t) atol(a_gid->val); 910 if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL) 911 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val); 912 } 913 gid = grp->gr_gid; 914 } else if ((grp = GETGRNAM(nam)) != NULL && 915 (grp->gr_mem == NULL || grp->gr_mem[0] == NULL)) { 916 gid = grp->gr_gid; /* Already created? Use it anyway... */ 917 } else { 918 struct cargs grpargs; 919 char tmp[32]; 920 921 LIST_INIT(&grpargs); 922 addarg(&grpargs, 'n', nam); 923 924 /* 925 * We need to auto-create a group with the user's name. We 926 * can send all the appropriate output to our sister routine 927 * bit first see if we can create a group with gid==uid so we 928 * can keep the user and group ids in sync. We purposely do 929 * NOT check the gid range if we can force the sync. If the 930 * user's name dups an existing group, then the group add 931 * function will happily handle that case for us and exit. 932 */ 933 if (GETGRGID(prefer) == NULL) { 934 sprintf(tmp, "%lu", (unsigned long) prefer); 935 addarg(&grpargs, 'g', tmp); 936 } 937 if (getarg(args, 'N')) 938 { 939 addarg(&grpargs, 'N', NULL); 940 addarg(&grpargs, 'q', NULL); 941 gid = pw_group(cnf, M_NEXT, &grpargs); 942 } 943 else 944 { 945 pw_group(cnf, M_ADD, &grpargs); 946 if ((grp = GETGRNAM(nam)) != NULL) 947 gid = grp->gr_gid; 948 } 949 a_gid = LIST_FIRST(&grpargs); 950 while (a_gid != NULL) { 951 struct carg *t = LIST_NEXT(a_gid, list); 952 LIST_REMOVE(a_gid, list); 953 a_gid = t; 954 } 955 } 956 ENDGRENT(); 957 return gid; 958} 959 960 961static time_t 962pw_pwdpolicy(struct userconf * cnf, struct cargs * args) 963{ 964 time_t result = 0; 965 time_t now = time(NULL); 966 struct carg *arg = getarg(args, 'p'); 967 968 if (arg != NULL) { 969 if ((result = parse_date(now, arg->val)) == now) 970 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 971 } else if (cnf->password_days > 0) 972 result = now + ((long) cnf->password_days * 86400L); 973 return result; 974} 975 976 977static time_t 978pw_exppolicy(struct userconf * cnf, struct cargs * args) 979{ 980 time_t result = 0; 981 time_t now = time(NULL); 982 struct carg *arg = getarg(args, 'e'); 983 984 if (arg != NULL) { 985 if ((result = parse_date(now, arg->val)) == now) 986 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 987 } else if (cnf->expire_days > 0) 988 result = now + ((long) cnf->expire_days * 86400L); 989 return result; 990} 991 992 993static char * 994pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user) 995{ 996 struct carg *arg = getarg(args, 'd'); 997 998 if (arg) 999 return arg->val; 1000 else { 1001 static char home[128]; 1002 1003 if (cnf->home == NULL || *cnf->home == '\0') 1004 errx(EX_CONFIG, "no base home directory set"); 1005 sprintf(home, "%s/%s", cnf->home, user); 1006 return home; 1007 } 1008} 1009 1010static char * 1011shell_path(char const * path, char *shells[], char *sh) 1012{ 1013 if (sh != NULL && (*sh == '/' || *sh == '\0')) 1014 return sh; /* specified full path or forced none */ 1015 else { 1016 char *p; 1017 char paths[_UC_MAXLINE]; 1018 1019 /* 1020 * We need to search paths 1021 */ 1022 strlcpy(paths, path, sizeof(paths)); 1023 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) { 1024 int i; 1025 static char shellpath[256]; 1026 1027 if (sh != NULL) { 1028 sprintf(shellpath, "%s/%s", p, sh); 1029 if (access(shellpath, X_OK) == 0) 1030 return shellpath; 1031 } else 1032 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) { 1033 sprintf(shellpath, "%s/%s", p, shells[i]); 1034 if (access(shellpath, X_OK) == 0) 1035 return shellpath; 1036 } 1037 } 1038 if (sh == NULL) 1039 errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh); 1040 errx(EX_CONFIG, "no default shell available or defined"); 1041 return NULL; 1042 } 1043} 1044 1045 1046static char * 1047pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell) 1048{ 1049 char *sh = newshell; 1050 struct carg *arg = getarg(args, 's'); 1051 1052 if (newshell == NULL && arg != NULL) 1053 sh = arg->val; 1054 return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default); 1055} 1056 1057#define SALTSIZE 32 1058 1059static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./"; 1060 1061char * 1062pw_pwcrypt(char *password) 1063{ 1064 int i; 1065 char salt[SALTSIZE + 1]; 1066 char *cryptpw; 1067 1068 static char buf[256]; 1069 1070 /* 1071 * Calculate a salt value 1072 */ 1073 for (i = 0; i < SALTSIZE; i++) 1074 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)]; 1075 salt[SALTSIZE] = '\0'; 1076 1077 cryptpw = crypt(password, salt); 1078 if (cryptpw == NULL) 1079 errx(EX_CONFIG, "crypt(3) failure"); 1080 return strcpy(buf, cryptpw); 1081} 1082 1083 1084static char * 1085pw_password(struct userconf * cnf, struct cargs * args, char const * user) 1086{ 1087 int i, l; 1088 char pwbuf[32]; 1089 1090 switch (cnf->default_password) { 1091 case -1: /* Random password */ 1092 l = (arc4random() % 8 + 8); /* 8 - 16 chars */ 1093 for (i = 0; i < l; i++) 1094 pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)]; 1095 pwbuf[i] = '\0'; 1096 1097 /* 1098 * We give this information back to the user 1099 */ 1100 if (getarg(args, 'h') == NULL && getarg(args, 'H') == NULL && 1101 getarg(args, 'N') == NULL) { 1102 if (isatty(STDOUT_FILENO)) 1103 printf("Password for '%s' is: ", user); 1104 printf("%s\n", pwbuf); 1105 fflush(stdout); 1106 } 1107 break; 1108 1109 case -2: /* No password at all! */ 1110 return ""; 1111 1112 case 0: /* No login - default */ 1113 default: 1114 return "*"; 1115 1116 case 1: /* user's name */ 1117 strlcpy(pwbuf, user, sizeof(pwbuf)); 1118 break; 1119 } 1120 return pw_pwcrypt(pwbuf); 1121} 1122 1123 1124static int 1125print_user(struct passwd * pwd, int pretty, int v7) 1126{ 1127 if (!pretty) { 1128 char *buf; 1129 1130 if (!v7) 1131 pwd->pw_passwd = (pwd->pw_passwd == NULL) ? "" : "*"; 1132 1133 buf = v7 ? pw_make_v7(pwd) : pw_make(pwd); 1134 printf("%s\n", buf); 1135 free(buf); 1136 } else { 1137 int j; 1138 char *p; 1139 struct group *grp = GETGRGID(pwd->pw_gid); 1140 char uname[60] = "User &", office[60] = "[None]", 1141 wphone[60] = "[None]", hphone[60] = "[None]"; 1142 char acexpire[32] = "[None]", pwexpire[32] = "[None]"; 1143 struct tm * tptr; 1144 1145 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) { 1146 strlcpy(uname, p, sizeof(uname)); 1147 if ((p = strtok(NULL, ",")) != NULL) { 1148 strlcpy(office, p, sizeof(office)); 1149 if ((p = strtok(NULL, ",")) != NULL) { 1150 strlcpy(wphone, p, sizeof(wphone)); 1151 if ((p = strtok(NULL, "")) != NULL) { 1152 strlcpy(hphone, p, 1153 sizeof(hphone)); 1154 } 1155 } 1156 } 1157 } 1158 /* 1159 * Handle '&' in gecos field 1160 */ 1161 if ((p = strchr(uname, '&')) != NULL) { 1162 int l = strlen(pwd->pw_name); 1163 int m = strlen(p); 1164 1165 memmove(p + l, p + 1, m); 1166 memmove(p, pwd->pw_name, l); 1167 *p = (char) toupper((unsigned char)*p); 1168 } 1169 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL) 1170 strftime(acexpire, sizeof acexpire, "%c", tptr); 1171 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL) 1172 strftime(pwexpire, sizeof pwexpire, "%c", tptr); 1173 printf("Login Name: %-15s #%-12ld Group: %-15s #%ld\n" 1174 " Full Name: %s\n" 1175 " Home: %-26.26s Class: %s\n" 1176 " Shell: %-26.26s Office: %s\n" 1177 "Work Phone: %-26.26s Home Phone: %s\n" 1178 "Acc Expire: %-26.26s Pwd Expire: %s\n", 1179 pwd->pw_name, (long) pwd->pw_uid, 1180 grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid, 1181 uname, pwd->pw_dir, pwd->pw_class, 1182 pwd->pw_shell, office, wphone, hphone, 1183 acexpire, pwexpire); 1184 SETGRENT(); 1185 j = 0; 1186 while ((grp=GETGRENT()) != NULL) 1187 { 1188 int i = 0; 1189 if (grp->gr_mem != NULL) { 1190 while (grp->gr_mem[i] != NULL) 1191 { 1192 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) 1193 { 1194 printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name); 1195 break; 1196 } 1197 ++i; 1198 } 1199 } 1200 } 1201 ENDGRENT(); 1202 printf("%s", j ? "\n" : ""); 1203 } 1204 return EXIT_SUCCESS; 1205} 1206 1207char * 1208pw_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 %td 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 1266static void 1267rmat(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 1291static void 1292rmopie(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