1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1991, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #if 0 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1991, 1993, 1994\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #ifndef lint 40 static char sccsid[] = "@(#)pwd_mkdb.c 8.5 (Berkeley) 4/20/94"; 41 #endif /* not lint */ 42 #endif 43 44 #include <sys/cdefs.h> 45 __FBSDID("$FreeBSD$"); 46 47 #include <sys/param.h> 48 #include <sys/endian.h> 49 #include <sys/stat.h> 50 #include <arpa/inet.h> 51 52 #include <db.h> 53 #include <err.h> 54 #include <errno.h> 55 #include <fcntl.h> 56 #include <libgen.h> 57 #include <limits.h> 58 #include <pwd.h> 59 #include <signal.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 #include "pw_scan.h" 66 67 #define INSECURE 1 68 #define SECURE 2 69 #define PERM_INSECURE (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) 70 #define PERM_SECURE (S_IRUSR|S_IWUSR) 71 #define LEGACY_VERSION(x) _PW_VERSIONED(x, 3) 72 #define CURRENT_VERSION(x) _PW_VERSIONED(x, 4) 73 74 static HASHINFO openinfo = { 75 4096, /* bsize */ 76 32, /* ffactor */ 77 256, /* nelem */ 78 2048 * 1024, /* cachesize */ 79 NULL, /* hash() */ 80 BYTE_ORDER /* lorder */ 81 }; 82 83 static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean; 84 static struct passwd pwd; /* password structure */ 85 static char *pname; /* password file name */ 86 static char prefix[MAXPATHLEN]; 87 88 static int is_comment; /* flag for comments */ 89 static char line[LINE_MAX]; 90 91 void cleanup(void); 92 void error(const char *); 93 void cp(char *, char *, mode_t mode); 94 void mv(char *, char *); 95 int scan(FILE *, struct passwd *); 96 static void usage(void); 97 98 int 99 main(int argc, char *argv[]) 100 { 101 static char verskey[] = _PWD_VERSION_KEY; 102 char version = _PWD_CURRENT_VERSION; 103 DB *dp, *sdp, *pw_db; 104 DBT data, sdata, key; 105 FILE *fp, *oldfp; 106 sigset_t set; 107 int ch, cnt, ypcnt, makeold, tfd, yp_enabled = 0; 108 unsigned int len; 109 uint32_t store; 110 const char *t; 111 char *p; 112 char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024]; 113 char sbuf[MAX(MAXPATHLEN, LINE_MAX * 2)]; 114 char buf2[MAXPATHLEN]; 115 char sbuf2[MAXPATHLEN]; 116 char *username; 117 u_int method, methoduid; 118 int Cflag, dflag, iflag, lflag; 119 int nblock = 0; 120 121 iflag = dflag = Cflag = lflag = 0; 122 strcpy(prefix, _PATH_PWD); 123 makeold = 0; 124 username = NULL; 125 oldfp = NULL; 126 while ((ch = getopt(argc, argv, "BCLlNd:ips:u:v")) != -1) 127 switch(ch) { 128 case 'B': /* big-endian output */ 129 openinfo.lorder = BIG_ENDIAN; 130 break; 131 case 'C': /* verify only */ 132 Cflag = 1; 133 break; 134 case 'l': /* generate legacy entries */ 135 lflag = 1; 136 break; 137 case 'L': /* little-endian output */ 138 openinfo.lorder = LITTLE_ENDIAN; 139 break; 140 case 'N': /* do not wait for lock */ 141 nblock = LOCK_NB; /* will fail if locked */ 142 break; 143 case 'd': 144 dflag++; 145 strlcpy(prefix, optarg, sizeof(prefix)); 146 break; 147 case 'i': 148 iflag++; 149 break; 150 case 'p': /* create V7 "file.orig" */ 151 makeold = 1; 152 break; 153 case 's': /* change default cachesize */ 154 openinfo.cachesize = atoi(optarg) * 1024 * 1024; 155 break; 156 case 'u': /* only update this record */ 157 username = optarg; 158 break; 159 case 'v': /* backward compatible */ 160 break; 161 default: 162 usage(); 163 } 164 argc -= optind; 165 argv += optind; 166 167 if (argc != 1 || (username && (*username == '+' || *username == '-'))) 168 usage(); 169 170 /* 171 * This could be changed to allow the user to interrupt. 172 * Probably not worth the effort. 173 */ 174 sigemptyset(&set); 175 sigaddset(&set, SIGTSTP); 176 sigaddset(&set, SIGHUP); 177 sigaddset(&set, SIGINT); 178 sigaddset(&set, SIGQUIT); 179 sigaddset(&set, SIGTERM); 180 (void)sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL); 181 182 /* We don't care what the user wants. */ 183 (void)umask(0); 184 185 pname = *argv; 186 187 /* 188 * Open and lock the original password file. We have to check 189 * the hardlink count after we get the lock to handle any potential 190 * unlink/rename race. 191 * 192 * This lock is necessary when someone runs pwd_mkdb manually, directly 193 * on master.passwd, to handle the case where a user might try to 194 * change his password while pwd_mkdb is running. 195 */ 196 for (;;) { 197 struct stat st; 198 199 if (!(fp = fopen(pname, "r"))) 200 error(pname); 201 if (flock(fileno(fp), LOCK_EX|nblock) < 0 && !(dflag && iflag)) 202 error("flock"); 203 if (fstat(fileno(fp), &st) < 0) 204 error(pname); 205 if (st.st_nlink != 0) 206 break; 207 fclose(fp); 208 fp = NULL; 209 } 210 211 /* check only if password database is valid */ 212 if (Cflag) { 213 while (scan(fp, &pwd)) 214 if (!is_comment && strlen(pwd.pw_name) >= MAXLOGNAME) { 215 warnx("%s: username too long", pwd.pw_name); 216 exit(1); 217 } 218 exit(0); 219 } 220 221 /* Open the temporary insecure password database. */ 222 (void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB); 223 (void)snprintf(sbuf, sizeof(sbuf), "%s/%s.tmp", prefix, _SMP_DB); 224 if (username) { 225 int use_version; 226 227 (void)snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _MP_DB); 228 (void)snprintf(sbuf2, sizeof(sbuf2), "%s/%s", prefix, _SMP_DB); 229 230 clean = FILE_INSECURE; 231 cp(buf2, buf, PERM_INSECURE); 232 dp = dbopen(buf, 233 O_RDWR|O_EXCL, PERM_INSECURE, DB_HASH, &openinfo); 234 if (dp == NULL) 235 error(buf); 236 237 clean = FILE_SECURE; 238 cp(sbuf2, sbuf, PERM_SECURE); 239 sdp = dbopen(sbuf, 240 O_RDWR|O_EXCL, PERM_SECURE, DB_HASH, &openinfo); 241 if (sdp == NULL) 242 error(sbuf); 243 244 /* 245 * Do some trouble to check if we should store this users 246 * uid. Don't use getpwnam/getpwuid as that interferes 247 * with NIS. 248 */ 249 pw_db = dbopen(_PATH_MP_DB, O_RDONLY, 0, DB_HASH, NULL); 250 if (!pw_db) 251 error(_MP_DB); 252 253 key.data = verskey; 254 key.size = sizeof(verskey)-1; 255 if ((pw_db->get)(pw_db, &key, &data, 0) == 0) 256 use_version = *(unsigned char *)data.data; 257 else 258 use_version = 3; 259 buf[0] = _PW_VERSIONED(_PW_KEYBYNAME, use_version); 260 len = strlen(username); 261 262 /* Only check that username fits in buffer */ 263 memmove(buf + 1, username, MIN(len, sizeof(buf) - 1)); 264 key.data = (u_char *)buf; 265 key.size = len + 1; 266 if ((pw_db->get)(pw_db, &key, &data, 0) == 0) { 267 p = (char *)data.data; 268 269 /* jump over pw_name and pw_passwd, to get to pw_uid */ 270 while (*p++) 271 ; 272 while (*p++) 273 ; 274 275 buf[0] = _PW_VERSIONED(_PW_KEYBYUID, use_version); 276 memmove(buf + 1, p, sizeof(store)); 277 key.data = (u_char *)buf; 278 key.size = sizeof(store) + 1; 279 280 if ((pw_db->get)(pw_db, &key, &data, 0) == 0) { 281 /* First field of data.data holds pw_pwname */ 282 if (!strcmp(data.data, username)) 283 methoduid = 0; 284 else 285 methoduid = R_NOOVERWRITE; 286 } else { 287 methoduid = R_NOOVERWRITE; 288 } 289 } else { 290 methoduid = R_NOOVERWRITE; 291 } 292 if ((pw_db->close)(pw_db)) 293 error("close pw_db"); 294 method = 0; 295 } else { 296 dp = dbopen(buf, 297 O_RDWR|O_CREAT|O_EXCL, PERM_INSECURE, DB_HASH, &openinfo); 298 if (dp == NULL) 299 error(buf); 300 clean = FILE_INSECURE; 301 302 sdp = dbopen(sbuf, 303 O_RDWR|O_CREAT|O_EXCL, PERM_SECURE, DB_HASH, &openinfo); 304 if (sdp == NULL) 305 error(sbuf); 306 clean = FILE_SECURE; 307 308 method = R_NOOVERWRITE; 309 methoduid = R_NOOVERWRITE; 310 } 311 312 /* 313 * Open file for old password file. Minor trickiness -- don't want to 314 * chance the file already existing, since someone (stupidly) might 315 * still be using this for permission checking. So, open it first and 316 * fdopen the resulting fd. The resulting file should be readable by 317 * everyone. 318 */ 319 if (makeold) { 320 (void)snprintf(buf, sizeof(buf), "%s.orig", pname); 321 if ((tfd = open(buf, 322 O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE)) < 0) 323 error(buf); 324 if ((oldfp = fdopen(tfd, "w")) == NULL) 325 error(buf); 326 clean = FILE_ORIG; 327 } 328 329 /* 330 * The databases actually contain three copies of the original data. 331 * Each password file entry is converted into a rough approximation 332 * of a ``struct passwd'', with the strings placed inline. This 333 * object is then stored as the data for three separate keys. The 334 * first key * is the pw_name field prepended by the _PW_KEYBYNAME 335 * character. The second key is the pw_uid field prepended by the 336 * _PW_KEYBYUID character. The third key is the line number in the 337 * original file prepended by the _PW_KEYBYNUM character. (The special 338 * characters are prepended to ensure that the keys do not collide.) 339 */ 340 /* In order to transition this file into a machine-independent 341 * form, we have to change the format of entries. However, since 342 * older binaries will still expect the old MD format entries, we 343 * create those as usual and use versioned tags for the new entries. 344 */ 345 if (username == NULL) { 346 /* Do not add the VERSION tag when updating a single 347 * user. When operating on `old format' databases, this 348 * would result in applications `seeing' only the updated 349 * entries. 350 */ 351 key.data = verskey; 352 key.size = sizeof(verskey)-1; 353 data.data = &version; 354 data.size = 1; 355 if ((dp->put)(dp, &key, &data, 0) == -1) 356 error("put"); 357 if ((sdp->put)(sdp, &key, &data, 0) == -1) 358 error("put"); 359 } 360 ypcnt = 0; 361 data.data = (u_char *)buf; 362 sdata.data = (u_char *)sbuf; 363 key.data = (u_char *)tbuf; 364 for (cnt = 1; scan(fp, &pwd); ++cnt) { 365 if (!is_comment && 366 (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-')) { 367 yp_enabled = 1; 368 ypcnt++; 369 } 370 if (is_comment) 371 --cnt; 372 #define COMPACT(e) t = e; while ((*p++ = *t++)); 373 #define SCALAR(e) store = htonl((uint32_t)(e)); \ 374 memmove(p, &store, sizeof(store)); \ 375 p += sizeof(store); 376 #define LSCALAR(e) store = HTOL((uint32_t)(e)); \ 377 memmove(p, &store, sizeof(store)); \ 378 p += sizeof(store); 379 #define HTOL(e) (openinfo.lorder == BYTE_ORDER ? \ 380 (uint32_t)(e) : \ 381 bswap32((uint32_t)(e))) 382 if (!is_comment && 383 (!username || (strcmp(username, pwd.pw_name) == 0))) { 384 /* Create insecure data. */ 385 p = buf; 386 COMPACT(pwd.pw_name); 387 COMPACT("*"); 388 SCALAR(pwd.pw_uid); 389 SCALAR(pwd.pw_gid); 390 SCALAR(pwd.pw_change); 391 COMPACT(pwd.pw_class); 392 COMPACT(pwd.pw_gecos); 393 COMPACT(pwd.pw_dir); 394 COMPACT(pwd.pw_shell); 395 SCALAR(pwd.pw_expire); 396 SCALAR(pwd.pw_fields); 397 data.size = p - buf; 398 399 /* Create secure data. */ 400 p = sbuf; 401 COMPACT(pwd.pw_name); 402 COMPACT(pwd.pw_passwd); 403 SCALAR(pwd.pw_uid); 404 SCALAR(pwd.pw_gid); 405 SCALAR(pwd.pw_change); 406 COMPACT(pwd.pw_class); 407 COMPACT(pwd.pw_gecos); 408 COMPACT(pwd.pw_dir); 409 COMPACT(pwd.pw_shell); 410 SCALAR(pwd.pw_expire); 411 SCALAR(pwd.pw_fields); 412 sdata.size = p - sbuf; 413 414 /* Store insecure by name. */ 415 tbuf[0] = CURRENT_VERSION(_PW_KEYBYNAME); 416 len = strlen(pwd.pw_name); 417 memmove(tbuf + 1, pwd.pw_name, len); 418 key.size = len + 1; 419 if ((dp->put)(dp, &key, &data, method) == -1) 420 error("put"); 421 422 /* Store insecure by number. */ 423 tbuf[0] = CURRENT_VERSION(_PW_KEYBYNUM); 424 store = htonl(cnt); 425 memmove(tbuf + 1, &store, sizeof(store)); 426 key.size = sizeof(store) + 1; 427 if ((dp->put)(dp, &key, &data, method) == -1) 428 error("put"); 429 430 /* Store insecure by uid. */ 431 tbuf[0] = CURRENT_VERSION(_PW_KEYBYUID); 432 store = htonl(pwd.pw_uid); 433 memmove(tbuf + 1, &store, sizeof(store)); 434 key.size = sizeof(store) + 1; 435 if ((dp->put)(dp, &key, &data, methoduid) == -1) 436 error("put"); 437 438 /* Store secure by name. */ 439 tbuf[0] = CURRENT_VERSION(_PW_KEYBYNAME); 440 len = strlen(pwd.pw_name); 441 memmove(tbuf + 1, pwd.pw_name, len); 442 key.size = len + 1; 443 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 444 error("put"); 445 446 /* Store secure by number. */ 447 tbuf[0] = CURRENT_VERSION(_PW_KEYBYNUM); 448 store = htonl(cnt); 449 memmove(tbuf + 1, &store, sizeof(store)); 450 key.size = sizeof(store) + 1; 451 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 452 error("put"); 453 454 /* Store secure by uid. */ 455 tbuf[0] = CURRENT_VERSION(_PW_KEYBYUID); 456 store = htonl(pwd.pw_uid); 457 memmove(tbuf + 1, &store, sizeof(store)); 458 key.size = sizeof(store) + 1; 459 if ((sdp->put)(sdp, &key, &sdata, methoduid) == -1) 460 error("put"); 461 462 /* Store insecure and secure special plus and special minus */ 463 if (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-') { 464 tbuf[0] = CURRENT_VERSION(_PW_KEYYPBYNUM); 465 store = htonl(ypcnt); 466 memmove(tbuf + 1, &store, sizeof(store)); 467 key.size = sizeof(store) + 1; 468 if ((dp->put)(dp, &key, &data, method) == -1) 469 error("put"); 470 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 471 error("put"); 472 } 473 474 if (lflag) { 475 /* Create insecure data. (legacy version) */ 476 p = buf; 477 COMPACT(pwd.pw_name); 478 COMPACT("*"); 479 LSCALAR(pwd.pw_uid); 480 LSCALAR(pwd.pw_gid); 481 LSCALAR(pwd.pw_change); 482 COMPACT(pwd.pw_class); 483 COMPACT(pwd.pw_gecos); 484 COMPACT(pwd.pw_dir); 485 COMPACT(pwd.pw_shell); 486 LSCALAR(pwd.pw_expire); 487 LSCALAR(pwd.pw_fields); 488 data.size = p - buf; 489 490 /* Create secure data. (legacy version) */ 491 p = sbuf; 492 COMPACT(pwd.pw_name); 493 COMPACT(pwd.pw_passwd); 494 LSCALAR(pwd.pw_uid); 495 LSCALAR(pwd.pw_gid); 496 LSCALAR(pwd.pw_change); 497 COMPACT(pwd.pw_class); 498 COMPACT(pwd.pw_gecos); 499 COMPACT(pwd.pw_dir); 500 COMPACT(pwd.pw_shell); 501 LSCALAR(pwd.pw_expire); 502 LSCALAR(pwd.pw_fields); 503 sdata.size = p - sbuf; 504 505 /* Store insecure by name. */ 506 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNAME); 507 len = strlen(pwd.pw_name); 508 memmove(tbuf + 1, pwd.pw_name, len); 509 key.size = len + 1; 510 if ((dp->put)(dp, &key, &data, method) == -1) 511 error("put"); 512 513 /* Store insecure by number. */ 514 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNUM); 515 store = HTOL(cnt); 516 memmove(tbuf + 1, &store, sizeof(store)); 517 key.size = sizeof(store) + 1; 518 if ((dp->put)(dp, &key, &data, method) == -1) 519 error("put"); 520 521 /* Store insecure by uid. */ 522 tbuf[0] = LEGACY_VERSION(_PW_KEYBYUID); 523 store = HTOL(pwd.pw_uid); 524 memmove(tbuf + 1, &store, sizeof(store)); 525 key.size = sizeof(store) + 1; 526 if ((dp->put)(dp, &key, &data, methoduid) == -1) 527 error("put"); 528 529 /* Store secure by name. */ 530 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNAME); 531 len = strlen(pwd.pw_name); 532 memmove(tbuf + 1, pwd.pw_name, len); 533 key.size = len + 1; 534 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 535 error("put"); 536 537 /* Store secure by number. */ 538 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNUM); 539 store = HTOL(cnt); 540 memmove(tbuf + 1, &store, sizeof(store)); 541 key.size = sizeof(store) + 1; 542 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 543 error("put"); 544 545 /* Store secure by uid. */ 546 tbuf[0] = LEGACY_VERSION(_PW_KEYBYUID); 547 store = HTOL(pwd.pw_uid); 548 memmove(tbuf + 1, &store, sizeof(store)); 549 key.size = sizeof(store) + 1; 550 if ((sdp->put)(sdp, &key, &sdata, methoduid) == -1) 551 error("put"); 552 553 /* Store insecure and secure special plus and special minus */ 554 if (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-') { 555 tbuf[0] = LEGACY_VERSION(_PW_KEYYPBYNUM); 556 store = HTOL(ypcnt); 557 memmove(tbuf + 1, &store, sizeof(store)); 558 key.size = sizeof(store) + 1; 559 if ((dp->put)(dp, &key, &data, method) == -1) 560 error("put"); 561 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 562 error("put"); 563 } 564 } 565 } 566 /* Create original format password file entry */ 567 if (is_comment && makeold){ /* copy comments */ 568 if (fprintf(oldfp, "%s\n", line) < 0) 569 error("write old"); 570 } else if (makeold) { 571 char uidstr[20]; 572 char gidstr[20]; 573 574 snprintf(uidstr, sizeof(uidstr), "%u", pwd.pw_uid); 575 snprintf(gidstr, sizeof(gidstr), "%u", pwd.pw_gid); 576 577 if (fprintf(oldfp, "%s:*:%s:%s:%s:%s:%s\n", 578 pwd.pw_name, pwd.pw_fields & _PWF_UID ? uidstr : "", 579 pwd.pw_fields & _PWF_GID ? gidstr : "", 580 pwd.pw_gecos, pwd.pw_dir, pwd.pw_shell) < 0) 581 error("write old"); 582 } 583 } 584 /* If YP enabled, set flag. */ 585 if (yp_enabled) { 586 buf[0] = yp_enabled + 2; 587 data.size = 1; 588 key.size = 1; 589 tbuf[0] = CURRENT_VERSION(_PW_KEYYPENABLED); 590 if ((dp->put)(dp, &key, &data, method) == -1) 591 error("put"); 592 if ((sdp->put)(sdp, &key, &data, method) == -1) 593 error("put"); 594 if (lflag) { 595 tbuf[0] = LEGACY_VERSION(_PW_KEYYPENABLED); 596 key.size = 1; 597 if ((dp->put)(dp, &key, &data, method) == -1) 598 error("put"); 599 if ((sdp->put)(sdp, &key, &data, method) == -1) 600 error("put"); 601 } 602 } 603 604 if ((dp->close)(dp) == -1) 605 error("close"); 606 if ((sdp->close)(sdp) == -1) 607 error("close"); 608 if (makeold) { 609 (void)fflush(oldfp); 610 if (fclose(oldfp) == EOF) 611 error("close old"); 612 } 613 614 /* Set master.passwd permissions, in case caller forgot. */ 615 (void)fchmod(fileno(fp), S_IRUSR|S_IWUSR); 616 617 /* Install as the real password files. */ 618 (void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB); 619 (void)snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _MP_DB); 620 mv(buf, buf2); 621 (void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _SMP_DB); 622 (void)snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _SMP_DB); 623 mv(buf, buf2); 624 if (makeold) { 625 (void)snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _PASSWD); 626 (void)snprintf(buf, sizeof(buf), "%s.orig", pname); 627 mv(buf, buf2); 628 } 629 /* 630 * Move the master password LAST -- chpass(1), passwd(1) and vipw(8) 631 * all use flock(2) on it to block other incarnations of themselves. 632 * The rename means that everything is unlocked, as the original file 633 * can no longer be accessed. 634 */ 635 (void)snprintf(buf, sizeof(buf), "%s/%s", prefix, _MASTERPASSWD); 636 mv(pname, buf); 637 638 /* 639 * Close locked password file after rename() 640 */ 641 if (fclose(fp) == EOF) 642 error("close fp"); 643 644 exit(0); 645 } 646 647 int 648 scan(FILE *fp, struct passwd *pw) 649 { 650 static int lcnt; 651 size_t len; 652 char *p; 653 654 p = fgetln(fp, &len); 655 if (p == NULL) 656 return (0); 657 ++lcnt; 658 /* 659 * ``... if I swallow anything evil, put your fingers down my 660 * throat...'' 661 * -- The Who 662 */ 663 if (len > 0 && p[len - 1] == '\n') 664 len--; 665 if (len >= sizeof(line) - 1) { 666 warnx("line #%d too long", lcnt); 667 goto fmt; 668 } 669 memcpy(line, p, len); 670 line[len] = '\0'; 671 672 /* 673 * Ignore comments: ^[ \t]*# 674 */ 675 for (p = line; *p != '\0'; p++) 676 if (*p != ' ' && *p != '\t') 677 break; 678 if (*p == '#' || *p == '\0') { 679 is_comment = 1; 680 return(1); 681 } else 682 is_comment = 0; 683 684 if (!__pw_scan(line, pw, _PWSCAN_WARN|_PWSCAN_MASTER)) { 685 warnx("at line #%d", lcnt); 686 fmt: errno = EFTYPE; /* XXX */ 687 error(pname); 688 } 689 690 return (1); 691 } 692 693 void 694 cp(char *from, char *to, mode_t mode) 695 { 696 static char buf[MAXBSIZE]; 697 int from_fd, rcount, to_fd, wcount; 698 699 if ((from_fd = open(from, O_RDONLY, 0)) < 0) 700 error(from); 701 if ((to_fd = open(to, O_WRONLY|O_CREAT|O_EXCL, mode)) < 0) 702 error(to); 703 while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) { 704 wcount = write(to_fd, buf, rcount); 705 if (rcount != wcount || wcount == -1) { 706 int sverrno = errno; 707 708 (void)snprintf(buf, sizeof(buf), "%s to %s", from, to); 709 errno = sverrno; 710 error(buf); 711 } 712 } 713 if (rcount < 0) { 714 int sverrno = errno; 715 716 (void)snprintf(buf, sizeof(buf), "%s to %s", from, to); 717 errno = sverrno; 718 error(buf); 719 } 720 } 721 722 723 void 724 mv(char *from, char *to) 725 { 726 char buf[MAXPATHLEN]; 727 char *to_dir; 728 int to_dir_fd = -1; 729 730 /* 731 * Make sure file is safe on disk. To improve performance we will call 732 * fsync() to the directory where file lies 733 */ 734 if (rename(from, to) != 0 || 735 (to_dir = dirname(to)) == NULL || 736 (to_dir_fd = open(to_dir, O_RDONLY|O_DIRECTORY)) == -1 || 737 fsync(to_dir_fd) != 0) { 738 int sverrno = errno; 739 (void)snprintf(buf, sizeof(buf), "%s to %s", from, to); 740 errno = sverrno; 741 if (to_dir_fd != -1) 742 close(to_dir_fd); 743 error(buf); 744 } 745 746 if (to_dir_fd != -1) 747 close(to_dir_fd); 748 } 749 750 void 751 error(const char *name) 752 { 753 754 warn("%s", name); 755 cleanup(); 756 exit(1); 757 } 758 759 void 760 cleanup(void) 761 { 762 char buf[MAXPATHLEN]; 763 764 switch(clean) { 765 case FILE_ORIG: 766 (void)snprintf(buf, sizeof(buf), "%s.orig", pname); 767 (void)unlink(buf); 768 /* FALLTHROUGH */ 769 case FILE_SECURE: 770 (void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _SMP_DB); 771 (void)unlink(buf); 772 /* FALLTHROUGH */ 773 case FILE_INSECURE: 774 (void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB); 775 (void)unlink(buf); 776 } 777 } 778 779 static void 780 usage(void) 781 { 782 783 (void)fprintf(stderr, 784 "usage: pwd_mkdb [-BCiLNp] [-d directory] [-s cachesize] [-u username] file\n"); 785 exit(1); 786 } 787