1 /*- 2 * Copyright (c) 1991, 1993, 1994 3 * The Regents of the University of California. 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 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1991, 1993, 1994 The Regents of the University of California. All rights reserved. 30 * @(#)pwd_mkdb.c 8.5 (Berkeley) 4/20/94 31 * $FreeBSD: src/usr.sbin/pwd_mkdb/pwd_mkdb.c,v 1.51 2005/06/15 10:13:04 dd Exp $ 32 */ 33 34 #include <sys/param.h> 35 #include <sys/endian.h> 36 #include <sys/stat.h> 37 #include <arpa/inet.h> 38 39 #include <db.h> 40 #include <err.h> 41 #include <errno.h> 42 #include <fcntl.h> 43 #include <limits.h> 44 #include <pwd.h> 45 #include <signal.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 51 #include "pw_scan.h" 52 53 #define INSECURE 1 54 #define SECURE 2 55 #define PERM_INSECURE (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) 56 #define PERM_SECURE (S_IRUSR|S_IWUSR) 57 #define LEGACY_VERSION(x) _PW_VERSIONED(x, 3) 58 #define CURRENT_VERSION(x) _PW_VERSIONED(x, 4) 59 60 HASHINFO openinfo = { 61 4096, /* bsize */ 62 32, /* ffactor */ 63 256, /* nelem */ 64 2048 * 1024, /* cachesize */ 65 NULL, /* hash() */ 66 BYTE_ORDER /* lorder */ 67 }; 68 69 static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean; 70 static struct passwd pwd; /* password structure */ 71 static char *pname; /* password file name */ 72 static char prefix[MAXPATHLEN]; 73 74 static int is_comment; /* flag for comments */ 75 static char line[LINE_MAX]; 76 77 void cleanup(void); 78 void error(const char *) __dead2; 79 void cp(char *, char *, mode_t mode); 80 void mv(char *, char *); 81 int scan(FILE *, struct passwd *); 82 static void usage(void); 83 84 int 85 main(int argc, char *argv[]) 86 { 87 static char verskey[] = _PWD_VERSION_KEY; 88 char version = _PWD_CURRENT_VERSION; 89 DB *dp, *sdp, *pw_db; 90 DBT data, sdata, key; 91 FILE *fp, *oldfp; 92 sigset_t set; 93 int ch, cnt, ypcnt, makeold, tfd, yp_enabled = 0; 94 unsigned int len; 95 uint32_t store; 96 const char *t; 97 char *p; 98 char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024]; 99 char sbuf[MAX(MAXPATHLEN, LINE_MAX * 2)]; 100 char buf2[MAXPATHLEN]; 101 char sbuf2[MAXPATHLEN]; 102 char *username; 103 u_int method, methoduid; 104 int Cflag, dflag, iflag; 105 int nblock = 0; 106 107 iflag = dflag = Cflag = 0; 108 strcpy(prefix, _PATH_PWD); 109 makeold = 0; 110 username = NULL; 111 oldfp = NULL; 112 while ((ch = getopt(argc, argv, "BCLNd:ips:u:v")) != -1) 113 switch(ch) { 114 case 'B': /* big-endian output */ 115 openinfo.lorder = BIG_ENDIAN; 116 break; 117 case 'C': /* verify only */ 118 Cflag = 1; 119 break; 120 case 'L': /* little-endian output */ 121 openinfo.lorder = LITTLE_ENDIAN; 122 break; 123 case 'N': /* do not wait for lock */ 124 nblock = LOCK_NB; /* will fail if locked */ 125 break; 126 case 'd': 127 dflag++; 128 strlcpy(prefix, optarg, sizeof(prefix)); 129 break; 130 case 'i': 131 iflag++; 132 break; 133 case 'p': /* create V7 "file.orig" */ 134 makeold = 1; 135 break; 136 case 's': /* change default cachesize */ 137 openinfo.cachesize = atoi(optarg) * 1024 * 1024; 138 break; 139 case 'u': /* only update this record */ 140 username = optarg; 141 break; 142 case 'v': /* backward compatible */ 143 break; 144 default: 145 usage(); 146 } 147 argc -= optind; 148 argv += optind; 149 150 if (argc != 1 || (username && (*username == '+' || *username == '-'))) 151 usage(); 152 153 /* 154 * This could be changed to allow the user to interrupt. 155 * Probably not worth the effort. 156 */ 157 sigemptyset(&set); 158 sigaddset(&set, SIGTSTP); 159 sigaddset(&set, SIGHUP); 160 sigaddset(&set, SIGINT); 161 sigaddset(&set, SIGQUIT); 162 sigaddset(&set, SIGTERM); 163 sigprocmask(SIG_BLOCK, &set, NULL); 164 165 /* We don't care what the user wants. */ 166 umask(0); 167 168 pname = *argv; 169 170 /* 171 * Open and lock the original password file. We have to check 172 * the hardlink count after we get the lock to handle any potential 173 * unlink/rename race. 174 * 175 * This lock is necessary when someone runs pwd_mkdb manually, directly 176 * on master.passwd, to handle the case where a user might try to 177 * change his password while pwd_mkdb is running. 178 */ 179 for (;;) { 180 struct stat st; 181 182 if (!(fp = fopen(pname, "r"))) 183 error(pname); 184 if (flock(fileno(fp), LOCK_EX|nblock) < 0 && !(dflag && iflag)) 185 error("flock"); 186 if (fstat(fileno(fp), &st) < 0) 187 error(pname); 188 if (st.st_nlink != 0) 189 break; 190 fclose(fp); 191 fp = NULL; 192 } 193 194 /* check only if password database is valid */ 195 if (Cflag) { 196 for (cnt = 1; scan(fp, &pwd); ++cnt); 197 exit(0); 198 } 199 200 /* Open the temporary insecure password database. */ 201 snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB); 202 snprintf(sbuf, sizeof(sbuf), "%s/%s.tmp", prefix, _SMP_DB); 203 if (username) { 204 int use_version; 205 206 snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _MP_DB); 207 snprintf(sbuf2, sizeof(sbuf2), "%s/%s", prefix, _SMP_DB); 208 209 clean = FILE_INSECURE; 210 cp(buf2, buf, PERM_INSECURE); 211 dp = dbopen(buf, 212 O_RDWR|O_EXCL, PERM_INSECURE, DB_HASH, &openinfo); 213 if (dp == NULL) 214 error(buf); 215 216 clean = FILE_SECURE; 217 cp(sbuf2, sbuf, PERM_SECURE); 218 sdp = dbopen(sbuf, 219 O_RDWR|O_EXCL, PERM_SECURE, DB_HASH, &openinfo); 220 if (sdp == NULL) 221 error(sbuf); 222 223 /* 224 * Do some trouble to check if we should store this users 225 * uid. Don't use getpwnam/getpwuid as that interferes 226 * with NIS. 227 */ 228 pw_db = dbopen(_PATH_MP_DB, O_RDONLY, 0, DB_HASH, NULL); 229 if (!pw_db) 230 error(_MP_DB); 231 232 key.data = verskey; 233 key.size = sizeof(verskey)-1; 234 if ((pw_db->get)(pw_db, &key, &data, 0) == 0) 235 use_version = *(unsigned char *)data.data; 236 else 237 use_version = 3; 238 buf[0] = _PW_VERSIONED(_PW_KEYBYNAME, use_version); 239 len = strlen(username); 240 241 /* Only check that username fits in buffer */ 242 memmove(buf + 1, username, MIN(len, sizeof(buf) - 1)); 243 key.data = (u_char *)buf; 244 key.size = len + 1; 245 if ((pw_db->get)(pw_db, &key, &data, 0) == 0) { 246 p = (char *)data.data; 247 248 /* jump over pw_name and pw_passwd, to get to pw_uid */ 249 while (*p++) 250 ; 251 while (*p++) 252 ; 253 254 buf[0] = _PW_VERSIONED(_PW_KEYBYUID, use_version); 255 memmove(buf + 1, p, sizeof(store)); 256 key.data = (u_char *)buf; 257 key.size = sizeof(store) + 1; 258 259 if ((pw_db->get)(pw_db, &key, &data, 0) == 0) { 260 /* First field of data.data holds pw_pwname */ 261 if (!strcmp(data.data, username)) 262 methoduid = 0; 263 else 264 methoduid = R_NOOVERWRITE; 265 } else { 266 methoduid = R_NOOVERWRITE; 267 } 268 } else { 269 methoduid = R_NOOVERWRITE; 270 } 271 if ((pw_db->close)(pw_db)) 272 error("close pw_db"); 273 method = 0; 274 } else { 275 dp = dbopen(buf, 276 O_RDWR|O_CREAT|O_EXCL, PERM_INSECURE, DB_HASH, &openinfo); 277 if (dp == NULL) 278 error(buf); 279 clean = FILE_INSECURE; 280 281 sdp = dbopen(sbuf, 282 O_RDWR|O_CREAT|O_EXCL, PERM_SECURE, DB_HASH, &openinfo); 283 if (sdp == NULL) 284 error(sbuf); 285 clean = FILE_SECURE; 286 287 method = R_NOOVERWRITE; 288 methoduid = R_NOOVERWRITE; 289 } 290 291 /* 292 * Open file for old password file. Minor trickiness -- don't want to 293 * chance the file already existing, since someone (stupidly) might 294 * still be using this for permission checking. So, open it first and 295 * fdopen the resulting fd. The resulting file should be readable by 296 * everyone. 297 */ 298 if (makeold) { 299 snprintf(buf, sizeof(buf), "%s.orig", pname); 300 if ((tfd = open(buf, 301 O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE)) < 0) 302 error(buf); 303 if ((oldfp = fdopen(tfd, "w")) == NULL) 304 error(buf); 305 clean = FILE_ORIG; 306 } 307 308 /* 309 * The databases actually contain three copies of the original data. 310 * Each password file entry is converted into a rough approximation 311 * of a ``struct passwd'', with the strings placed inline. This 312 * object is then stored as the data for three separate keys. The 313 * first key * is the pw_name field prepended by the _PW_KEYBYNAME 314 * character. The second key is the pw_uid field prepended by the 315 * _PW_KEYBYUID character. The third key is the line number in the 316 * original file prepended by the _PW_KEYBYNUM character. (The special 317 * characters are prepended to ensure that the keys do not collide.) 318 */ 319 /* In order to transition this file into a machine-independent 320 * form, we have to change the format of entries. However, since 321 * older binaries will still expect the old MD format entries, we 322 * create those as usual and use versioned tags for the new entries. 323 */ 324 if (username == NULL) { 325 /* Do not add the VERSION tag when updating a single 326 * user. When operating on `old format' databases, this 327 * would result in applications `seeing' only the updated 328 * entries. 329 */ 330 key.data = verskey; 331 key.size = sizeof(verskey)-1; 332 data.data = &version; 333 data.size = 1; 334 if ((dp->put)(dp, &key, &data, 0) == -1) 335 error("put"); 336 if ((dp->put)(sdp, &key, &data, 0) == -1) 337 error("put"); 338 } 339 ypcnt = 1; 340 data.data = (u_char *)buf; 341 sdata.data = (u_char *)sbuf; 342 key.data = (u_char *)tbuf; 343 for (cnt = 1; scan(fp, &pwd); ++cnt) { 344 if (!is_comment && 345 (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-')) 346 yp_enabled = 1; 347 if (is_comment) 348 --cnt; 349 #define COMPACT(e) t = e; while ((*p++ = *t++)); 350 #define SCALAR(e) store = htonl((uint32_t)(e)); \ 351 memmove(p, &store, sizeof(store)); \ 352 p += sizeof(store); 353 #define LSCALAR(e) store = HTOL((uint32_t)(e)); \ 354 memmove(p, &store, sizeof(store)); \ 355 p += sizeof(store); 356 #define HTOL(e) (openinfo.lorder == BYTE_ORDER ? \ 357 (uint32_t)(e) : \ 358 bswap32((uint32_t)(e))) 359 if (!is_comment && 360 (!username || (strcmp(username, pwd.pw_name) == 0))) { 361 /* Create insecure data. */ 362 p = buf; 363 COMPACT(pwd.pw_name); 364 COMPACT("*"); 365 SCALAR(pwd.pw_uid); 366 SCALAR(pwd.pw_gid); 367 SCALAR(pwd.pw_change); 368 COMPACT(pwd.pw_class); 369 COMPACT(pwd.pw_gecos); 370 COMPACT(pwd.pw_dir); 371 COMPACT(pwd.pw_shell); 372 SCALAR(pwd.pw_expire); 373 SCALAR(pwd.pw_fields); 374 data.size = p - buf; 375 376 /* Create secure data. */ 377 p = sbuf; 378 COMPACT(pwd.pw_name); 379 COMPACT(pwd.pw_passwd); 380 SCALAR(pwd.pw_uid); 381 SCALAR(pwd.pw_gid); 382 SCALAR(pwd.pw_change); 383 COMPACT(pwd.pw_class); 384 COMPACT(pwd.pw_gecos); 385 COMPACT(pwd.pw_dir); 386 COMPACT(pwd.pw_shell); 387 SCALAR(pwd.pw_expire); 388 SCALAR(pwd.pw_fields); 389 sdata.size = p - sbuf; 390 391 /* Store insecure by name. */ 392 tbuf[0] = CURRENT_VERSION(_PW_KEYBYNAME); 393 len = strlen(pwd.pw_name); 394 memmove(tbuf + 1, pwd.pw_name, len); 395 key.size = len + 1; 396 if ((dp->put)(dp, &key, &data, method) == -1) 397 error("put"); 398 399 /* Store insecure by number. */ 400 tbuf[0] = CURRENT_VERSION(_PW_KEYBYNUM); 401 store = htonl(cnt); 402 memmove(tbuf + 1, &store, sizeof(store)); 403 key.size = sizeof(store) + 1; 404 if ((dp->put)(dp, &key, &data, method) == -1) 405 error("put"); 406 407 /* Store insecure by uid. */ 408 tbuf[0] = CURRENT_VERSION(_PW_KEYBYUID); 409 store = htonl(pwd.pw_uid); 410 memmove(tbuf + 1, &store, sizeof(store)); 411 key.size = sizeof(store) + 1; 412 if ((dp->put)(dp, &key, &data, methoduid) == -1) 413 error("put"); 414 415 /* Store secure by name. */ 416 tbuf[0] = CURRENT_VERSION(_PW_KEYBYNAME); 417 len = strlen(pwd.pw_name); 418 memmove(tbuf + 1, pwd.pw_name, len); 419 key.size = len + 1; 420 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 421 error("put"); 422 423 /* Store secure by number. */ 424 tbuf[0] = CURRENT_VERSION(_PW_KEYBYNUM); 425 store = htonl(cnt); 426 memmove(tbuf + 1, &store, sizeof(store)); 427 key.size = sizeof(store) + 1; 428 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 429 error("put"); 430 431 /* Store secure by uid. */ 432 tbuf[0] = CURRENT_VERSION(_PW_KEYBYUID); 433 store = htonl(pwd.pw_uid); 434 memmove(tbuf + 1, &store, sizeof(store)); 435 key.size = sizeof(store) + 1; 436 if ((sdp->put)(sdp, &key, &sdata, methoduid) == -1) 437 error("put"); 438 439 /* Store insecure and secure special plus and special minus */ 440 if (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-') { 441 tbuf[0] = CURRENT_VERSION(_PW_KEYYPBYNUM); 442 store = htonl(ypcnt); 443 memmove(tbuf + 1, &store, sizeof(store)); 444 ypcnt++; 445 key.size = sizeof(store) + 1; 446 if ((dp->put)(dp, &key, &data, method) == -1) 447 error("put"); 448 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 449 error("put"); 450 } 451 452 /* Create insecure data. (legacy version) */ 453 p = buf; 454 COMPACT(pwd.pw_name); 455 COMPACT("*"); 456 LSCALAR(pwd.pw_uid); 457 LSCALAR(pwd.pw_gid); 458 LSCALAR(pwd.pw_change); 459 COMPACT(pwd.pw_class); 460 COMPACT(pwd.pw_gecos); 461 COMPACT(pwd.pw_dir); 462 COMPACT(pwd.pw_shell); 463 LSCALAR(pwd.pw_expire); 464 LSCALAR(pwd.pw_fields); 465 data.size = p - buf; 466 467 /* Create secure data. (legacy version) */ 468 p = sbuf; 469 COMPACT(pwd.pw_name); 470 COMPACT(pwd.pw_passwd); 471 LSCALAR(pwd.pw_uid); 472 LSCALAR(pwd.pw_gid); 473 LSCALAR(pwd.pw_change); 474 COMPACT(pwd.pw_class); 475 COMPACT(pwd.pw_gecos); 476 COMPACT(pwd.pw_dir); 477 COMPACT(pwd.pw_shell); 478 LSCALAR(pwd.pw_expire); 479 LSCALAR(pwd.pw_fields); 480 sdata.size = p - sbuf; 481 482 /* Store insecure by name. */ 483 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNAME); 484 len = strlen(pwd.pw_name); 485 memmove(tbuf + 1, pwd.pw_name, len); 486 key.size = len + 1; 487 if ((dp->put)(dp, &key, &data, method) == -1) 488 error("put"); 489 490 /* Store insecure by number. */ 491 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNUM); 492 store = HTOL(cnt); 493 memmove(tbuf + 1, &store, sizeof(store)); 494 key.size = sizeof(store) + 1; 495 if ((dp->put)(dp, &key, &data, method) == -1) 496 error("put"); 497 498 /* Store insecure by uid. */ 499 tbuf[0] = LEGACY_VERSION(_PW_KEYBYUID); 500 store = HTOL(pwd.pw_uid); 501 memmove(tbuf + 1, &store, sizeof(store)); 502 key.size = sizeof(store) + 1; 503 if ((dp->put)(dp, &key, &data, methoduid) == -1) 504 error("put"); 505 506 /* Store secure by name. */ 507 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNAME); 508 len = strlen(pwd.pw_name); 509 memmove(tbuf + 1, pwd.pw_name, len); 510 key.size = len + 1; 511 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 512 error("put"); 513 514 /* Store secure by number. */ 515 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNUM); 516 store = HTOL(cnt); 517 memmove(tbuf + 1, &store, sizeof(store)); 518 key.size = sizeof(store) + 1; 519 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 520 error("put"); 521 522 /* Store secure by uid. */ 523 tbuf[0] = LEGACY_VERSION(_PW_KEYBYUID); 524 store = HTOL(pwd.pw_uid); 525 memmove(tbuf + 1, &store, sizeof(store)); 526 key.size = sizeof(store) + 1; 527 if ((sdp->put)(sdp, &key, &sdata, methoduid) == -1) 528 error("put"); 529 530 /* Store insecure and secure special plus and special minus */ 531 if (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-') { 532 tbuf[0] = LEGACY_VERSION(_PW_KEYYPBYNUM); 533 store = HTOL(ypcnt); 534 memmove(tbuf + 1, &store, sizeof(store)); 535 ypcnt++; 536 key.size = sizeof(store) + 1; 537 if ((dp->put)(dp, &key, &data, method) == -1) 538 error("put"); 539 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 540 error("put"); 541 } 542 } 543 /* Create original format password file entry */ 544 if (is_comment && makeold){ /* copy comments */ 545 if (fprintf(oldfp, "%s\n", line) < 0) 546 error("write old"); 547 } else if (makeold) { 548 char uidstr[20]; 549 char gidstr[20]; 550 551 snprintf(uidstr, sizeof(uidstr), "%u", pwd.pw_uid); 552 snprintf(gidstr, sizeof(gidstr), "%u", pwd.pw_gid); 553 554 if (fprintf(oldfp, "%s:*:%s:%s:%s:%s:%s\n", 555 pwd.pw_name, pwd.pw_fields & _PWF_UID ? uidstr : "", 556 pwd.pw_fields & _PWF_GID ? gidstr : "", 557 pwd.pw_gecos, pwd.pw_dir, pwd.pw_shell) < 0) 558 error("write old"); 559 } 560 } 561 /* If YP enabled, set flag. */ 562 if (yp_enabled) { 563 buf[0] = yp_enabled + 2; 564 data.size = 1; 565 key.size = 1; 566 tbuf[0] = CURRENT_VERSION(_PW_KEYYPENABLED); 567 if ((dp->put)(dp, &key, &data, method) == -1) 568 error("put"); 569 if ((sdp->put)(sdp, &key, &data, method) == -1) 570 error("put"); 571 tbuf[0] = LEGACY_VERSION(_PW_KEYYPENABLED); 572 key.size = 1; 573 if ((dp->put)(dp, &key, &data, method) == -1) 574 error("put"); 575 if ((sdp->put)(sdp, &key, &data, method) == -1) 576 error("put"); 577 } 578 579 if ((dp->close)(dp) == -1) 580 error("close"); 581 if ((sdp->close)(sdp) == -1) 582 error("close"); 583 if (makeold) { 584 fflush(oldfp); 585 if (fclose(oldfp) == EOF) 586 error("close old"); 587 } 588 589 /* Set master.passwd permissions, in case caller forgot. */ 590 fchmod(fileno(fp), S_IRUSR|S_IWUSR); 591 592 /* Install as the real password files. */ 593 snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB); 594 snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _MP_DB); 595 mv(buf, buf2); 596 snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _SMP_DB); 597 snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _SMP_DB); 598 mv(buf, buf2); 599 if (makeold) { 600 snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _PASSWD); 601 snprintf(buf, sizeof(buf), "%s.orig", pname); 602 mv(buf, buf2); 603 } 604 /* 605 * Move the master password LAST -- chpass(1), passwd(1) and vipw(8) 606 * all use flock(2) on it to block other incarnations of themselves. 607 * The rename means that everything is unlocked, as the original file 608 * can no longer be accessed. 609 */ 610 snprintf(buf, sizeof(buf), "%s/%s", prefix, _MASTERPASSWD); 611 mv(pname, buf); 612 613 /* 614 * Close locked password file after rename() 615 */ 616 if (fclose(fp) == EOF) 617 error("close fp"); 618 619 exit(0); 620 } 621 622 int 623 scan(FILE *fp, struct passwd *pw) 624 { 625 static int lcnt; 626 size_t len; 627 char *p; 628 629 p = fgetln(fp, &len); 630 if (p == NULL) 631 return (0); 632 ++lcnt; 633 /* 634 * ``... if I swallow anything evil, put your fingers down my 635 * throat...'' 636 * -- The Who 637 */ 638 if (len > 0 && p[len - 1] == '\n') 639 len--; 640 if (len >= sizeof(line) - 1) { 641 warnx("line #%d too long", lcnt); 642 goto fmt; 643 } 644 memcpy(line, p, len); 645 line[len] = '\0'; 646 647 /* 648 * Ignore comments: ^[ \t]*# 649 */ 650 for (p = line; *p != '\0'; p++) 651 if (*p != ' ' && *p != '\t') 652 break; 653 if (*p == '#' || *p == '\0') { 654 is_comment = 1; 655 return(1); 656 } else 657 is_comment = 0; 658 659 if (!__pw_scan(line, pw, _PWSCAN_WARN|_PWSCAN_MASTER)) { 660 warnx("at line #%d", lcnt); 661 fmt: errno = EFTYPE; /* XXX */ 662 error(pname); 663 } 664 665 return (1); 666 } 667 668 void 669 cp(char *from, char *to, mode_t mode) 670 { 671 static char buf[MAXBSIZE]; 672 int from_fd, rcount, to_fd, wcount; 673 674 if ((from_fd = open(from, O_RDONLY, 0)) < 0) 675 error(from); 676 if ((to_fd = open(to, O_WRONLY|O_CREAT|O_EXCL, mode)) < 0) 677 error(to); 678 while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) { 679 wcount = write(to_fd, buf, rcount); 680 if (rcount != wcount || wcount == -1) { 681 int sverrno = errno; 682 683 snprintf(buf, sizeof(buf), "%s to %s", from, to); 684 errno = sverrno; 685 error(buf); 686 } 687 } 688 if (rcount < 0) { 689 int sverrno = errno; 690 691 snprintf(buf, sizeof(buf), "%s to %s", from, to); 692 errno = sverrno; 693 error(buf); 694 } 695 } 696 697 698 void 699 mv(char *from, char *to) 700 { 701 char buf[MAXPATHLEN]; 702 703 if (rename(from, to)) { 704 int sverrno = errno; 705 snprintf(buf, sizeof(buf), "%s to %s", from, to); 706 errno = sverrno; 707 error(buf); 708 } 709 } 710 711 void 712 error(const char *name) 713 { 714 715 warn("%s", name); 716 cleanup(); 717 exit(1); 718 } 719 720 void 721 cleanup(void) 722 { 723 char buf[MAXPATHLEN]; 724 725 switch(clean) { 726 case FILE_ORIG: 727 snprintf(buf, sizeof(buf), "%s.orig", pname); 728 unlink(buf); 729 /* FALLTHROUGH */ 730 case FILE_SECURE: 731 snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _SMP_DB); 732 unlink(buf); 733 /* FALLTHROUGH */ 734 case FILE_INSECURE: 735 snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB); 736 unlink(buf); 737 } 738 } 739 740 static void 741 usage(void) 742 { 743 744 fprintf(stderr, 745 "usage: pwd_mkdb [-BCiLNp] [-d directory] [-s cachesize] [-u username] file\n"); 746 exit(1); 747 } 748