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 * 4. 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 * $DragonFly: src/usr.sbin/pwd_mkdb/pwd_mkdb.c,v 1.5 2005/12/05 02:40:27 swildner Exp $ 33 */ 34 35 #include <sys/param.h> 36 #include <sys/endian.h> 37 #include <sys/stat.h> 38 #include <arpa/inet.h> 39 40 #include <db.h> 41 #include <err.h> 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <limits.h> 45 #include <pwd.h> 46 #include <signal.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <unistd.h> 51 52 #include "pw_scan.h" 53 54 #define INSECURE 1 55 #define SECURE 2 56 #define PERM_INSECURE (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) 57 #define PERM_SECURE (S_IRUSR|S_IWUSR) 58 #define LEGACY_VERSION(x) _PW_VERSIONED(x, 3) 59 #define CURRENT_VERSION(x) _PW_VERSIONED(x, 4) 60 61 HASHINFO openinfo = { 62 4096, /* bsize */ 63 32, /* ffactor */ 64 256, /* nelem */ 65 2048 * 1024, /* cachesize */ 66 NULL, /* hash() */ 67 BYTE_ORDER /* lorder */ 68 }; 69 70 static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean; 71 static struct passwd pwd; /* password structure */ 72 static char *pname; /* password file name */ 73 static char prefix[MAXPATHLEN]; 74 75 static int is_comment; /* flag for comments */ 76 static char line[LINE_MAX]; 77 78 void cleanup(void); 79 void error(const char *); 80 void cp(char *, char *, mode_t mode); 81 void mv(char *, char *); 82 int scan(FILE *, struct passwd *); 83 static void usage(void); 84 85 int 86 main(int argc, char *argv[]) 87 { 88 static char verskey[] = _PWD_VERSION_KEY; 89 char version = _PWD_CURRENT_VERSION; 90 DB *dp, *sdp, *pw_db; 91 DBT data, sdata, key; 92 FILE *fp, *oldfp; 93 sigset_t set; 94 int ch, cnt, ypcnt, makeold, tfd, yp_enabled = 0; 95 unsigned int len; 96 uint32_t store; 97 const char *t; 98 char *p; 99 char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024]; 100 char sbuf[MAX(MAXPATHLEN, LINE_MAX * 2)]; 101 char buf2[MAXPATHLEN]; 102 char sbuf2[MAXPATHLEN]; 103 char *username; 104 u_int method, methoduid; 105 int Cflag, dflag, iflag; 106 int nblock = 0; 107 108 iflag = dflag = Cflag = 0; 109 strcpy(prefix, _PATH_PWD); 110 makeold = 0; 111 username = NULL; 112 oldfp = NULL; 113 while ((ch = getopt(argc, argv, "BCLNd:ips:u:v")) != -1) 114 switch(ch) { 115 case 'B': /* big-endian output */ 116 openinfo.lorder = BIG_ENDIAN; 117 break; 118 case 'C': /* verify only */ 119 Cflag = 1; 120 break; 121 case 'L': /* little-endian output */ 122 openinfo.lorder = LITTLE_ENDIAN; 123 break; 124 case 'N': /* do not wait for lock */ 125 nblock = LOCK_NB; /* will fail if locked */ 126 break; 127 case 'd': 128 dflag++; 129 strlcpy(prefix, optarg, sizeof(prefix)); 130 break; 131 case 'i': 132 iflag++; 133 break; 134 case 'p': /* create V7 "file.orig" */ 135 makeold = 1; 136 break; 137 case 's': /* change default cachesize */ 138 openinfo.cachesize = atoi(optarg) * 1024 * 1024; 139 break; 140 case 'u': /* only update this record */ 141 username = optarg; 142 break; 143 case 'v': /* backward compatible */ 144 break; 145 default: 146 usage(); 147 } 148 argc -= optind; 149 argv += optind; 150 151 if (argc != 1 || (username && (*username == '+' || *username == '-'))) 152 usage(); 153 154 /* 155 * This could be changed to allow the user to interrupt. 156 * Probably not worth the effort. 157 */ 158 sigemptyset(&set); 159 sigaddset(&set, SIGTSTP); 160 sigaddset(&set, SIGHUP); 161 sigaddset(&set, SIGINT); 162 sigaddset(&set, SIGQUIT); 163 sigaddset(&set, SIGTERM); 164 sigprocmask(SIG_BLOCK, &set, NULL); 165 166 /* We don't care what the user wants. */ 167 umask(0); 168 169 pname = *argv; 170 171 /* 172 * Open and lock the original password file. We have to check 173 * the hardlink count after we get the lock to handle any potential 174 * unlink/rename race. 175 * 176 * This lock is necessary when someone runs pwd_mkdb manually, directly 177 * on master.passwd, to handle the case where a user might try to 178 * change his password while pwd_mkdb is running. 179 */ 180 for (;;) { 181 struct stat st; 182 183 if (!(fp = fopen(pname, "r"))) 184 error(pname); 185 if (flock(fileno(fp), LOCK_EX|nblock) < 0 && !(dflag && iflag)) 186 error("flock"); 187 if (fstat(fileno(fp), &st) < 0) 188 error(pname); 189 if (st.st_nlink != 0) 190 break; 191 fclose(fp); 192 fp = NULL; 193 } 194 195 /* check only if password database is valid */ 196 if (Cflag) { 197 for (cnt = 1; scan(fp, &pwd); ++cnt); 198 exit(0); 199 } 200 201 /* Open the temporary insecure password database. */ 202 snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB); 203 snprintf(sbuf, sizeof(sbuf), "%s/%s.tmp", prefix, _SMP_DB); 204 if (username) { 205 int use_version; 206 207 snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _MP_DB); 208 snprintf(sbuf2, sizeof(sbuf2), "%s/%s", prefix, _SMP_DB); 209 210 clean = FILE_INSECURE; 211 cp(buf2, buf, PERM_INSECURE); 212 dp = dbopen(buf, 213 O_RDWR|O_EXCL, PERM_INSECURE, DB_HASH, &openinfo); 214 if (dp == NULL) 215 error(buf); 216 217 clean = FILE_SECURE; 218 cp(sbuf2, sbuf, PERM_SECURE); 219 sdp = dbopen(sbuf, 220 O_RDWR|O_EXCL, PERM_SECURE, DB_HASH, &openinfo); 221 if (sdp == NULL) 222 error(sbuf); 223 224 /* 225 * Do some trouble to check if we should store this users 226 * uid. Don't use getpwnam/getpwuid as that interferes 227 * with NIS. 228 */ 229 pw_db = dbopen(_PATH_MP_DB, O_RDONLY, 0, DB_HASH, NULL); 230 if (!pw_db) 231 error(_MP_DB); 232 233 key.data = verskey; 234 key.size = sizeof(verskey)-1; 235 if ((pw_db->get)(pw_db, &key, &data, 0) == 0) 236 use_version = *(unsigned char *)data.data; 237 else 238 use_version = 3; 239 buf[0] = _PW_VERSIONED(_PW_KEYBYNAME, use_version); 240 len = strlen(username); 241 242 /* Only check that username fits in buffer */ 243 memmove(buf + 1, username, MIN(len, sizeof(buf) - 1)); 244 key.data = (u_char *)buf; 245 key.size = len + 1; 246 if ((pw_db->get)(pw_db, &key, &data, 0) == 0) { 247 p = (char *)data.data; 248 249 /* jump over pw_name and pw_passwd, to get to pw_uid */ 250 while (*p++) 251 ; 252 while (*p++) 253 ; 254 255 buf[0] = _PW_VERSIONED(_PW_KEYBYUID, use_version); 256 memmove(buf + 1, p, sizeof(store)); 257 key.data = (u_char *)buf; 258 key.size = sizeof(store) + 1; 259 260 if ((pw_db->get)(pw_db, &key, &data, 0) == 0) { 261 /* First field of data.data holds pw_pwname */ 262 if (!strcmp(data.data, username)) 263 methoduid = 0; 264 else 265 methoduid = R_NOOVERWRITE; 266 } else { 267 methoduid = R_NOOVERWRITE; 268 } 269 } else { 270 methoduid = R_NOOVERWRITE; 271 } 272 if ((pw_db->close)(pw_db)) 273 error("close pw_db"); 274 method = 0; 275 } else { 276 dp = dbopen(buf, 277 O_RDWR|O_CREAT|O_EXCL, PERM_INSECURE, DB_HASH, &openinfo); 278 if (dp == NULL) 279 error(buf); 280 clean = FILE_INSECURE; 281 282 sdp = dbopen(sbuf, 283 O_RDWR|O_CREAT|O_EXCL, PERM_SECURE, DB_HASH, &openinfo); 284 if (sdp == NULL) 285 error(sbuf); 286 clean = FILE_SECURE; 287 288 method = R_NOOVERWRITE; 289 methoduid = R_NOOVERWRITE; 290 } 291 292 /* 293 * Open file for old password file. Minor trickiness -- don't want to 294 * chance the file already existing, since someone (stupidly) might 295 * still be using this for permission checking. So, open it first and 296 * fdopen the resulting fd. The resulting file should be readable by 297 * everyone. 298 */ 299 if (makeold) { 300 snprintf(buf, sizeof(buf), "%s.orig", pname); 301 if ((tfd = open(buf, 302 O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE)) < 0) 303 error(buf); 304 if ((oldfp = fdopen(tfd, "w")) == NULL) 305 error(buf); 306 clean = FILE_ORIG; 307 } 308 309 /* 310 * The databases actually contain three copies of the original data. 311 * Each password file entry is converted into a rough approximation 312 * of a ``struct passwd'', with the strings placed inline. This 313 * object is then stored as the data for three separate keys. The 314 * first key * is the pw_name field prepended by the _PW_KEYBYNAME 315 * character. The second key is the pw_uid field prepended by the 316 * _PW_KEYBYUID character. The third key is the line number in the 317 * original file prepended by the _PW_KEYBYNUM character. (The special 318 * characters are prepended to ensure that the keys do not collide.) 319 */ 320 /* In order to transition this file into a machine-independent 321 * form, we have to change the format of entries. However, since 322 * older binaries will still expect the old MD format entries, we 323 * create those as usual and use versioned tags for the new entries. 324 */ 325 if (username == NULL) { 326 /* Do not add the VERSION tag when updating a single 327 * user. When operating on `old format' databases, this 328 * would result in applications `seeing' only the updated 329 * entries. 330 */ 331 key.data = verskey; 332 key.size = sizeof(verskey)-1; 333 data.data = &version; 334 data.size = 1; 335 if ((dp->put)(dp, &key, &data, 0) == -1) 336 error("put"); 337 if ((dp->put)(sdp, &key, &data, 0) == -1) 338 error("put"); 339 } 340 ypcnt = 1; 341 data.data = (u_char *)buf; 342 sdata.data = (u_char *)sbuf; 343 key.data = (u_char *)tbuf; 344 for (cnt = 1; scan(fp, &pwd); ++cnt) { 345 if (!is_comment && 346 (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-')) 347 yp_enabled = 1; 348 if (is_comment) 349 --cnt; 350 #define COMPACT(e) t = e; while ((*p++ = *t++)); 351 #define SCALAR(e) store = htonl((uint32_t)(e)); \ 352 memmove(p, &store, sizeof(store)); \ 353 p += sizeof(store); 354 #define LSCALAR(e) store = HTOL((uint32_t)(e)); \ 355 memmove(p, &store, sizeof(store)); \ 356 p += sizeof(store); 357 #define HTOL(e) (openinfo.lorder == BYTE_ORDER ? \ 358 (uint32_t)(e) : \ 359 bswap32((uint32_t)(e))) 360 if (!is_comment && 361 (!username || (strcmp(username, pwd.pw_name) == 0))) { 362 /* Create insecure data. */ 363 p = buf; 364 COMPACT(pwd.pw_name); 365 COMPACT("*"); 366 SCALAR(pwd.pw_uid); 367 SCALAR(pwd.pw_gid); 368 SCALAR(pwd.pw_change); 369 COMPACT(pwd.pw_class); 370 COMPACT(pwd.pw_gecos); 371 COMPACT(pwd.pw_dir); 372 COMPACT(pwd.pw_shell); 373 SCALAR(pwd.pw_expire); 374 SCALAR(pwd.pw_fields); 375 data.size = p - buf; 376 377 /* Create secure data. */ 378 p = sbuf; 379 COMPACT(pwd.pw_name); 380 COMPACT(pwd.pw_passwd); 381 SCALAR(pwd.pw_uid); 382 SCALAR(pwd.pw_gid); 383 SCALAR(pwd.pw_change); 384 COMPACT(pwd.pw_class); 385 COMPACT(pwd.pw_gecos); 386 COMPACT(pwd.pw_dir); 387 COMPACT(pwd.pw_shell); 388 SCALAR(pwd.pw_expire); 389 SCALAR(pwd.pw_fields); 390 sdata.size = p - sbuf; 391 392 /* Store insecure by name. */ 393 tbuf[0] = CURRENT_VERSION(_PW_KEYBYNAME); 394 len = strlen(pwd.pw_name); 395 memmove(tbuf + 1, pwd.pw_name, len); 396 key.size = len + 1; 397 if ((dp->put)(dp, &key, &data, method) == -1) 398 error("put"); 399 400 /* Store insecure by number. */ 401 tbuf[0] = CURRENT_VERSION(_PW_KEYBYNUM); 402 store = htonl(cnt); 403 memmove(tbuf + 1, &store, sizeof(store)); 404 key.size = sizeof(store) + 1; 405 if ((dp->put)(dp, &key, &data, method) == -1) 406 error("put"); 407 408 /* Store insecure by uid. */ 409 tbuf[0] = CURRENT_VERSION(_PW_KEYBYUID); 410 store = htonl(pwd.pw_uid); 411 memmove(tbuf + 1, &store, sizeof(store)); 412 key.size = sizeof(store) + 1; 413 if ((dp->put)(dp, &key, &data, methoduid) == -1) 414 error("put"); 415 416 /* Store secure by name. */ 417 tbuf[0] = CURRENT_VERSION(_PW_KEYBYNAME); 418 len = strlen(pwd.pw_name); 419 memmove(tbuf + 1, pwd.pw_name, len); 420 key.size = len + 1; 421 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 422 error("put"); 423 424 /* Store secure by number. */ 425 tbuf[0] = CURRENT_VERSION(_PW_KEYBYNUM); 426 store = htonl(cnt); 427 memmove(tbuf + 1, &store, sizeof(store)); 428 key.size = sizeof(store) + 1; 429 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 430 error("put"); 431 432 /* Store secure by uid. */ 433 tbuf[0] = CURRENT_VERSION(_PW_KEYBYUID); 434 store = htonl(pwd.pw_uid); 435 memmove(tbuf + 1, &store, sizeof(store)); 436 key.size = sizeof(store) + 1; 437 if ((sdp->put)(sdp, &key, &sdata, methoduid) == -1) 438 error("put"); 439 440 /* Store insecure and secure special plus and special minus */ 441 if (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-') { 442 tbuf[0] = CURRENT_VERSION(_PW_KEYYPBYNUM); 443 store = htonl(ypcnt); 444 memmove(tbuf + 1, &store, sizeof(store)); 445 ypcnt++; 446 key.size = sizeof(store) + 1; 447 if ((dp->put)(dp, &key, &data, method) == -1) 448 error("put"); 449 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 450 error("put"); 451 } 452 453 /* Create insecure data. (legacy version) */ 454 p = buf; 455 COMPACT(pwd.pw_name); 456 COMPACT("*"); 457 LSCALAR(pwd.pw_uid); 458 LSCALAR(pwd.pw_gid); 459 LSCALAR(pwd.pw_change); 460 COMPACT(pwd.pw_class); 461 COMPACT(pwd.pw_gecos); 462 COMPACT(pwd.pw_dir); 463 COMPACT(pwd.pw_shell); 464 LSCALAR(pwd.pw_expire); 465 LSCALAR(pwd.pw_fields); 466 data.size = p - buf; 467 468 /* Create secure data. (legacy version) */ 469 p = sbuf; 470 COMPACT(pwd.pw_name); 471 COMPACT(pwd.pw_passwd); 472 LSCALAR(pwd.pw_uid); 473 LSCALAR(pwd.pw_gid); 474 LSCALAR(pwd.pw_change); 475 COMPACT(pwd.pw_class); 476 COMPACT(pwd.pw_gecos); 477 COMPACT(pwd.pw_dir); 478 COMPACT(pwd.pw_shell); 479 LSCALAR(pwd.pw_expire); 480 LSCALAR(pwd.pw_fields); 481 sdata.size = p - sbuf; 482 483 /* Store insecure by name. */ 484 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNAME); 485 len = strlen(pwd.pw_name); 486 memmove(tbuf + 1, pwd.pw_name, len); 487 key.size = len + 1; 488 if ((dp->put)(dp, &key, &data, method) == -1) 489 error("put"); 490 491 /* Store insecure by number. */ 492 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNUM); 493 store = HTOL(cnt); 494 memmove(tbuf + 1, &store, sizeof(store)); 495 key.size = sizeof(store) + 1; 496 if ((dp->put)(dp, &key, &data, method) == -1) 497 error("put"); 498 499 /* Store insecure by uid. */ 500 tbuf[0] = LEGACY_VERSION(_PW_KEYBYUID); 501 store = HTOL(pwd.pw_uid); 502 memmove(tbuf + 1, &store, sizeof(store)); 503 key.size = sizeof(store) + 1; 504 if ((dp->put)(dp, &key, &data, methoduid) == -1) 505 error("put"); 506 507 /* Store secure by name. */ 508 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNAME); 509 len = strlen(pwd.pw_name); 510 memmove(tbuf + 1, pwd.pw_name, len); 511 key.size = len + 1; 512 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 513 error("put"); 514 515 /* Store secure by number. */ 516 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNUM); 517 store = HTOL(cnt); 518 memmove(tbuf + 1, &store, sizeof(store)); 519 key.size = sizeof(store) + 1; 520 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 521 error("put"); 522 523 /* Store secure by uid. */ 524 tbuf[0] = LEGACY_VERSION(_PW_KEYBYUID); 525 store = HTOL(pwd.pw_uid); 526 memmove(tbuf + 1, &store, sizeof(store)); 527 key.size = sizeof(store) + 1; 528 if ((sdp->put)(sdp, &key, &sdata, methoduid) == -1) 529 error("put"); 530 531 /* Store insecure and secure special plus and special minus */ 532 if (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-') { 533 tbuf[0] = LEGACY_VERSION(_PW_KEYYPBYNUM); 534 store = HTOL(ypcnt); 535 memmove(tbuf + 1, &store, sizeof(store)); 536 ypcnt++; 537 key.size = sizeof(store) + 1; 538 if ((dp->put)(dp, &key, &data, method) == -1) 539 error("put"); 540 if ((sdp->put)(sdp, &key, &sdata, method) == -1) 541 error("put"); 542 } 543 } 544 /* Create original format password file entry */ 545 if (is_comment && makeold){ /* copy comments */ 546 if (fprintf(oldfp, "%s\n", line) < 0) 547 error("write old"); 548 } else if (makeold) { 549 char uidstr[20]; 550 char gidstr[20]; 551 552 snprintf(uidstr, sizeof(uidstr), "%u", pwd.pw_uid); 553 snprintf(gidstr, sizeof(gidstr), "%u", pwd.pw_gid); 554 555 if (fprintf(oldfp, "%s:*:%s:%s:%s:%s:%s\n", 556 pwd.pw_name, pwd.pw_fields & _PWF_UID ? uidstr : "", 557 pwd.pw_fields & _PWF_GID ? gidstr : "", 558 pwd.pw_gecos, pwd.pw_dir, pwd.pw_shell) < 0) 559 error("write old"); 560 } 561 } 562 /* If YP enabled, set flag. */ 563 if (yp_enabled) { 564 buf[0] = yp_enabled + 2; 565 data.size = 1; 566 key.size = 1; 567 tbuf[0] = CURRENT_VERSION(_PW_KEYYPENABLED); 568 if ((dp->put)(dp, &key, &data, method) == -1) 569 error("put"); 570 if ((sdp->put)(sdp, &key, &data, method) == -1) 571 error("put"); 572 tbuf[0] = LEGACY_VERSION(_PW_KEYYPENABLED); 573 key.size = 1; 574 if ((dp->put)(dp, &key, &data, method) == -1) 575 error("put"); 576 if ((sdp->put)(sdp, &key, &data, method) == -1) 577 error("put"); 578 } 579 580 if ((dp->close)(dp) == -1) 581 error("close"); 582 if ((sdp->close)(sdp) == -1) 583 error("close"); 584 if (makeold) { 585 fflush(oldfp); 586 if (fclose(oldfp) == EOF) 587 error("close old"); 588 } 589 590 /* Set master.passwd permissions, in case caller forgot. */ 591 fchmod(fileno(fp), S_IRUSR|S_IWUSR); 592 593 /* Install as the real password files. */ 594 snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB); 595 snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _MP_DB); 596 mv(buf, buf2); 597 snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _SMP_DB); 598 snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _SMP_DB); 599 mv(buf, buf2); 600 if (makeold) { 601 snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _PASSWD); 602 snprintf(buf, sizeof(buf), "%s.orig", pname); 603 mv(buf, buf2); 604 } 605 /* 606 * Move the master password LAST -- chpass(1), passwd(1) and vipw(8) 607 * all use flock(2) on it to block other incarnations of themselves. 608 * The rename means that everything is unlocked, as the original file 609 * can no longer be accessed. 610 */ 611 snprintf(buf, sizeof(buf), "%s/%s", prefix, _MASTERPASSWD); 612 mv(pname, buf); 613 614 /* 615 * Close locked password file after rename() 616 */ 617 if (fclose(fp) == EOF) 618 error("close fp"); 619 620 exit(0); 621 } 622 623 int 624 scan(FILE *fp, struct passwd *pw) 625 { 626 static int lcnt; 627 size_t len; 628 char *p; 629 630 p = fgetln(fp, &len); 631 if (p == NULL) 632 return (0); 633 ++lcnt; 634 /* 635 * ``... if I swallow anything evil, put your fingers down my 636 * throat...'' 637 * -- The Who 638 */ 639 if (len > 0 && p[len - 1] == '\n') 640 len--; 641 if (len >= sizeof(line) - 1) { 642 warnx("line #%d too long", lcnt); 643 goto fmt; 644 } 645 memcpy(line, p, len); 646 line[len] = '\0'; 647 648 /* 649 * Ignore comments: ^[ \t]*# 650 */ 651 for (p = line; *p != '\0'; p++) 652 if (*p != ' ' && *p != '\t') 653 break; 654 if (*p == '#' || *p == '\0') { 655 is_comment = 1; 656 return(1); 657 } else 658 is_comment = 0; 659 660 if (!__pw_scan(line, pw, _PWSCAN_WARN|_PWSCAN_MASTER)) { 661 warnx("at line #%d", lcnt); 662 fmt: errno = EFTYPE; /* XXX */ 663 error(pname); 664 } 665 666 return (1); 667 } 668 669 void 670 cp(char *from, char *to, mode_t mode) 671 { 672 static char buf[MAXBSIZE]; 673 int from_fd, rcount, to_fd, wcount; 674 675 if ((from_fd = open(from, O_RDONLY, 0)) < 0) 676 error(from); 677 if ((to_fd = open(to, O_WRONLY|O_CREAT|O_EXCL, mode)) < 0) 678 error(to); 679 while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) { 680 wcount = write(to_fd, buf, rcount); 681 if (rcount != wcount || wcount == -1) { 682 int sverrno = errno; 683 684 snprintf(buf, sizeof(buf), "%s to %s", from, to); 685 errno = sverrno; 686 error(buf); 687 } 688 } 689 if (rcount < 0) { 690 int sverrno = errno; 691 692 snprintf(buf, sizeof(buf), "%s to %s", from, to); 693 errno = sverrno; 694 error(buf); 695 } 696 } 697 698 699 void 700 mv(char *from, char *to) 701 { 702 char buf[MAXPATHLEN]; 703 704 if (rename(from, to)) { 705 int sverrno = errno; 706 snprintf(buf, sizeof(buf), "%s to %s", from, to); 707 errno = sverrno; 708 error(buf); 709 } 710 } 711 712 void 713 error(const char *name) 714 { 715 716 warn("%s", name); 717 cleanup(); 718 exit(1); 719 } 720 721 void 722 cleanup(void) 723 { 724 char buf[MAXPATHLEN]; 725 726 switch(clean) { 727 case FILE_ORIG: 728 snprintf(buf, sizeof(buf), "%s.orig", pname); 729 unlink(buf); 730 /* FALLTHROUGH */ 731 case FILE_SECURE: 732 snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _SMP_DB); 733 unlink(buf); 734 /* FALLTHROUGH */ 735 case FILE_INSECURE: 736 snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB); 737 unlink(buf); 738 } 739 } 740 741 static void 742 usage(void) 743 { 744 745 fprintf(stderr, 746 "usage: pwd_mkdb [-BCiLNp] [-d directory] [-s cachesize] [-u username] file\n"); 747 exit(1); 748 } 749