1 /* $NetBSD: restore.c,v 1.22 2021/06/19 13:56:35 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 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 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)restore.c 8.3 (Berkeley) 9/13/94"; 36 #else 37 __RCSID("$NetBSD: restore.c,v 1.22 2021/06/19 13:56:35 christos Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/types.h> 42 #include <sys/stat.h> 43 44 #include <ufs/ufs/dinode.h> 45 46 #include <stdio.h> 47 #include <string.h> 48 49 #include "restore.h" 50 #include "extern.h" 51 52 static char *keyval(int); 53 54 /* 55 * This implements the 't' option. 56 * List entries on the tape. 57 */ 58 long 59 listfile(const char *name, ino_t ino, int type) 60 { 61 long descend = hflag ? GOOD : FAIL; 62 63 if (TSTINO(ino, dumpmap) == 0) 64 return (descend); 65 vprintf(stdout, "%s", type == LEAF ? "leaf" : "dir "); 66 fprintf(stdout, "%10ju\t%s\n", (uintmax_t)ino, name); 67 return (descend); 68 } 69 70 /* 71 * This implements the 'x' option. 72 * Request that new entries be extracted. 73 */ 74 long 75 addfile(const char *name, ino_t ino, int type) 76 { 77 struct entry *ep; 78 long descend = hflag ? GOOD : FAIL; 79 char buf[100]; 80 81 if (TSTINO(ino, dumpmap) == 0) { 82 dprintf(stdout, "%s: not on the tape\n", name); 83 return (descend); 84 } 85 if (ino == UFS_WINO && command == 'i' && !vflag) 86 return (descend); 87 if (!mflag) { 88 (void) snprintf(buf, sizeof(buf), "./%ju", 89 (uintmax_t)ino); 90 name = buf; 91 if (type == NODE) { 92 (void) genliteraldir(name, ino); 93 return (descend); 94 } 95 } 96 ep = lookupino(ino); 97 if (ep != NULL) { 98 if (strcmp(name, myname(ep)) == 0) { 99 ep->e_flags |= NEW; 100 return (descend); 101 } 102 type |= LINK; 103 } 104 ep = addentry(name, ino, type); 105 if (type == NODE) 106 newnode(ep); 107 ep->e_flags |= NEW; 108 return (descend); 109 } 110 111 /* 112 * This is used by the 'i' option to undo previous requests made by addfile. 113 * Delete entries from the request queue. 114 */ 115 /* ARGSUSED */ 116 long 117 deletefile(const char *name, ino_t ino, int type __unused) 118 { 119 long descend = hflag ? GOOD : FAIL; 120 struct entry *ep; 121 122 if (TSTINO(ino, dumpmap) == 0) 123 return (descend); 124 ep = lookupname(name); 125 if (ep != NULL) { 126 ep->e_flags &= ~NEW; 127 ep->e_flags |= REMOVED; 128 if (ep->e_type != NODE) 129 freeentry(ep); 130 } 131 return (descend); 132 } 133 134 /* 135 * The following four routines implement the incremental 136 * restore algorithm. The first removes old entries, the second 137 * does renames and calculates the extraction list, the third 138 * cleans up link names missed by the first two, and the final 139 * one deletes old directories. 140 * 141 * Directories cannot be immediately deleted, as they may have 142 * other files in them which need to be moved out first. As 143 * directories to be deleted are found, they are put on the 144 * following deletion list. After all deletions and renames 145 * are done, this list is actually deleted. 146 */ 147 static struct entry *removelist; 148 149 /* 150 * Remove invalid whiteouts from the old tree. 151 * Remove unneeded leaves from the old tree. 152 * Remove directories from the lookup chains. 153 */ 154 void 155 removeoldleaves(void) 156 { 157 struct entry *ep, *nextep; 158 ino_t i, mydirino; 159 160 vprintf(stdout, "Mark entries to be removed.\n"); 161 if ((ep = lookupino(UFS_WINO)) != NULL) { 162 vprintf(stdout, "Delete whiteouts\n"); 163 for ( ; ep != NULL; ep = nextep) { 164 nextep = ep->e_links; 165 mydirino = ep->e_parent->e_ino; 166 /* 167 * We remove all whiteouts that are in directories 168 * that have been removed or that have been dumped. 169 */ 170 if (TSTINO(mydirino, usedinomap) && 171 !TSTINO(mydirino, dumpmap)) 172 continue; 173 delwhiteout(ep); 174 freeentry(ep); 175 } 176 } 177 for (i = UFS_ROOTINO + 1; i < maxino; i++) { 178 ep = lookupino(i); 179 if (ep == NULL) 180 continue; 181 if (TSTINO(i, usedinomap)) 182 continue; 183 for ( ; ep != NULL; ep = ep->e_links) { 184 dprintf(stdout, "%s: REMOVE\n", myname(ep)); 185 if (ep->e_type == LEAF) { 186 removeleaf(ep); 187 freeentry(ep); 188 } else { 189 mktempname(ep); 190 deleteino(ep->e_ino); 191 ep->e_next = removelist; 192 removelist = ep; 193 } 194 } 195 } 196 } 197 198 /* 199 * For each directory entry on the incremental tape, determine which 200 * category it falls into as follows: 201 * KEEP - entries that are to be left alone. 202 * NEW - new entries to be added. 203 * EXTRACT - files that must be updated with new contents. 204 * LINK - new links to be added. 205 * Renames are done at the same time. 206 */ 207 long 208 nodeupdates(const char *name, ino_t ino, int type) 209 { 210 struct entry *ep, *np, *ip; 211 long descend = GOOD; 212 int lookuptype = 0; 213 int key = 0; 214 /* key values */ 215 # define ONTAPE 0x1 /* inode is on the tape */ 216 # define INOFND 0x2 /* inode already exists */ 217 # define NAMEFND 0x4 /* name already exists */ 218 # define MODECHG 0x8 /* mode of inode changed */ 219 220 /* 221 * This routine is called once for each element in the 222 * directory hierarchy, with a full path name. 223 * The "type" value is incorrectly specified as LEAF for 224 * directories that are not on the dump tape. 225 * 226 * Check to see if the file is on the tape. 227 */ 228 if (TSTINO(ino, dumpmap)) 229 key |= ONTAPE; 230 /* 231 * Check to see if the name exists, and if the name is a link. 232 */ 233 np = lookupname(name); 234 if (np != NULL) { 235 key |= NAMEFND; 236 ip = lookupino(np->e_ino); 237 if (ip == NULL) 238 panic("corrupted symbol table\n"); 239 if (ip != np) 240 lookuptype = LINK; 241 } 242 /* 243 * Check to see if the inode exists, and if one of its links 244 * corresponds to the name (if one was found). 245 */ 246 ip = lookupino(ino); 247 if (ip != NULL) { 248 key |= INOFND; 249 for (ep = ip->e_links; ep != NULL; ep = ep->e_links) { 250 if (ep == np) { 251 ip = ep; 252 break; 253 } 254 } 255 } 256 /* 257 * If both a name and an inode are found, but they do not 258 * correspond to the same file, then both the inode that has 259 * been found and the inode corresponding to the name that 260 * has been found need to be renamed. The current pathname 261 * is the new name for the inode that has been found. Since 262 * all files to be deleted have already been removed, the 263 * named file is either a now unneeded link, or it must live 264 * under a new name in this dump level. If it is a link, it 265 * can be removed. If it is not a link, it is given a 266 * temporary name in anticipation that it will be renamed 267 * when it is later found by inode number. 268 */ 269 if (((key & (INOFND|NAMEFND)) == (INOFND|NAMEFND)) && ip != np) { 270 if (lookuptype == LINK) { 271 removeleaf(np); 272 freeentry(np); 273 } else { 274 dprintf(stdout, "name/inode conflict, mktempname %s\n", 275 myname(np)); 276 mktempname(np); 277 } 278 np = NULL; 279 key &= ~NAMEFND; 280 } 281 if ((key & ONTAPE) && 282 (((key & INOFND) && ip->e_type != type) || 283 ((key & NAMEFND) && np->e_type != type))) 284 key |= MODECHG; 285 286 /* 287 * Decide on the disposition of the file based on its flags. 288 * Note that we have already handled the case in which 289 * a name and inode are found that correspond to different files. 290 * Thus if both NAMEFND and INOFND are set then ip == np. 291 */ 292 switch (key) { 293 294 /* 295 * A previously existing file has been found. 296 * Mark it as KEEP so that other links to the inode can be 297 * detected, and so that it will not be reclaimed by the search 298 * for unreferenced names. 299 */ 300 case INOFND|NAMEFND: 301 ip->e_flags |= KEEP; 302 dprintf(stdout, "[%s] %s: %s\n", keyval(key), name, 303 flagvalues(ip)); 304 break; 305 306 /* 307 * A file on the tape has a name which is the same as a name 308 * corresponding to a different file in the previous dump. 309 * Since all files to be deleted have already been removed, 310 * this file is either a now unneeded link, or it must live 311 * under a new name in this dump level. If it is a link, it 312 * can simply be removed. If it is not a link, it is given a 313 * temporary name in anticipation that it will be renamed 314 * when it is later found by inode number (see INOFND case 315 * below). The entry is then treated as a new file. 316 */ 317 case ONTAPE|NAMEFND: 318 case ONTAPE|NAMEFND|MODECHG: 319 if (lookuptype == LINK) { 320 removeleaf(np); 321 freeentry(np); 322 } else { 323 mktempname(np); 324 } 325 /* FALLTHROUGH */ 326 327 /* 328 * A previously non-existent file. 329 * Add it to the file system, and request its extraction. 330 * If it is a directory, create it immediately. 331 * (Since the name is unused there can be no conflict) 332 */ 333 case ONTAPE: 334 ep = addentry(name, ino, type); 335 if (type == NODE) 336 newnode(ep); 337 ep->e_flags |= NEW|KEEP; 338 dprintf(stdout, "[%s] %s: %s\n", keyval(key), name, 339 flagvalues(ep)); 340 break; 341 342 /* 343 * A file with the same inode number, but a different 344 * name has been found. If the other name has not already 345 * been found (indicated by the KEEP flag, see above) then 346 * this must be a new name for the file, and it is renamed. 347 * If the other name has been found then this must be a 348 * link to the file. Hard links to directories are not 349 * permitted, and are either deleted or converted to 350 * symbolic links. Finally, if the file is on the tape, 351 * a request is made to extract it. 352 */ 353 case ONTAPE|INOFND: 354 if (type == LEAF && (ip->e_flags & KEEP) == 0) 355 ip->e_flags |= EXTRACT; 356 /* FALLTHROUGH */ 357 case INOFND: 358 if ((ip->e_flags & KEEP) == 0) { 359 renameit(myname(ip), name); 360 moveentry(ip, name); 361 ip->e_flags |= KEEP; 362 dprintf(stdout, "[%s] %s: %s\n", keyval(key), name, 363 flagvalues(ip)); 364 break; 365 } 366 if (ip->e_type == NODE) { 367 descend = FAIL; 368 fprintf(stderr, 369 "deleted hard link %s to directory %s\n", 370 name, myname(ip)); 371 break; 372 } 373 ep = addentry(name, ino, type|LINK); 374 ep->e_flags |= NEW; 375 dprintf(stdout, "[%s] %s: %s|LINK\n", keyval(key), name, 376 flagvalues(ep)); 377 break; 378 379 /* 380 * A previously known file which is to be updated. If it is a link, 381 * then all names referring to the previous file must be removed 382 * so that the subset of them that remain can be recreated. 383 */ 384 case ONTAPE|INOFND|NAMEFND: 385 if (lookuptype == LINK) { 386 removeleaf(np); 387 freeentry(np); 388 ep = addentry(name, ino, type|LINK); 389 if (type == NODE) 390 newnode(ep); 391 ep->e_flags |= NEW|KEEP; 392 dprintf(stdout, "[%s] %s: %s|LINK\n", keyval(key), name, 393 flagvalues(ep)); 394 break; 395 } 396 if (type == LEAF && lookuptype != LINK) 397 np->e_flags |= EXTRACT; 398 np->e_flags |= KEEP; 399 dprintf(stdout, "[%s] %s: %s\n", keyval(key), name, 400 flagvalues(np)); 401 break; 402 403 /* 404 * An inode is being reused in a completely different way. 405 * Normally an extract can simply do an "unlink" followed 406 * by a "creat". Here we must do effectively the same 407 * thing. The complications arise because we cannot really 408 * delete a directory since it may still contain files 409 * that we need to rename, so we delete it from the symbol 410 * table, and put it on the list to be deleted eventually. 411 * Conversely if a directory is to be created, it must be 412 * done immediately, rather than waiting until the 413 * extraction phase. 414 */ 415 case ONTAPE|INOFND|MODECHG: 416 case ONTAPE|INOFND|NAMEFND|MODECHG: 417 if (ip->e_flags & KEEP) { 418 badentry(ip, "cannot KEEP and change modes"); 419 break; 420 } 421 if (ip->e_type == LEAF) { 422 /* changing from leaf to node */ 423 for ( ; ip != NULL; ip = ip->e_links) { 424 if (ip->e_type != LEAF) 425 badentry(ip, 426 "NODE and LEAF links to same inode"); 427 removeleaf(ip); 428 freeentry(ip); 429 } 430 ip = addentry(name, ino, type); 431 newnode(ip); 432 } else { 433 /* changing from node to leaf */ 434 if ((ip->e_flags & TMPNAME) == 0) 435 mktempname(ip); 436 deleteino(ip->e_ino); 437 ip->e_next = removelist; 438 removelist = ip; 439 ip = addentry(name, ino, type); 440 } 441 ip->e_flags |= NEW|KEEP; 442 dprintf(stdout, "[%s] %s: %s\n", keyval(key), name, 443 flagvalues(ip)); 444 break; 445 446 /* 447 * A hard link to a diirectory that has been removed. 448 * Ignore it. 449 */ 450 case NAMEFND: 451 dprintf(stdout, "[%s] %s: Extraneous name\n", keyval(key), 452 name); 453 descend = FAIL; 454 break; 455 456 /* 457 * If we find a directory entry for a file that is not on 458 * the tape, then we must have found a file that was created 459 * while the dump was in progress. Since we have no contents 460 * for it, we discard the name knowing that it will be on the 461 * next incremental tape. 462 */ 463 case 0: 464 fprintf(stderr, "%s: (inode %ju) not found on tape\n", 465 name, (uintmax_t)ino); 466 break; 467 468 /* 469 * If any of these arise, something is grievously wrong with 470 * the current state of the symbol table. 471 */ 472 case INOFND|NAMEFND|MODECHG: 473 case NAMEFND|MODECHG: 474 case INOFND|MODECHG: 475 fprintf(stderr, "[%s] %s: inconsistent state\n", keyval(key), 476 name); 477 break; 478 479 /* 480 * These states "cannot" arise for any state of the symbol table. 481 */ 482 case ONTAPE|MODECHG: 483 case MODECHG: 484 default: 485 panic("[%s] %s: impossible state\n", keyval(key), name); 486 break; 487 } 488 return (descend); 489 } 490 491 /* 492 * Calculate the active flags in a key. 493 */ 494 static char * 495 keyval(int key) 496 { 497 static char keybuf[32]; 498 499 (void) strcpy(keybuf, "|NIL"); 500 keybuf[0] = '\0'; 501 if (key & ONTAPE) 502 (void) strcat(keybuf, "|ONTAPE"); 503 if (key & INOFND) 504 (void) strcat(keybuf, "|INOFND"); 505 if (key & NAMEFND) 506 (void) strcat(keybuf, "|NAMEFND"); 507 if (key & MODECHG) 508 (void) strcat(keybuf, "|MODECHG"); 509 return (&keybuf[1]); 510 } 511 512 /* 513 * Find unreferenced link names. 514 */ 515 void 516 findunreflinks(void) 517 { 518 struct entry *ep, *np; 519 ino_t i; 520 521 vprintf(stdout, "Find unreferenced names.\n"); 522 for (i = UFS_ROOTINO; i < maxino; i++) { 523 ep = lookupino(i); 524 if (ep == NULL || ep->e_type == LEAF || TSTINO(i, dumpmap) == 0) 525 continue; 526 for (np = ep->e_entries; np != NULL; np = np->e_sibling) { 527 if (np->e_flags == 0) { 528 dprintf(stdout, 529 "%s: remove unreferenced name\n", 530 myname(np)); 531 removeleaf(np); 532 freeentry(np); 533 } 534 } 535 } 536 /* 537 * Any leaves remaining in removed directories is unreferenced. 538 */ 539 for (ep = removelist; ep != NULL; ep = ep->e_next) { 540 for (np = ep->e_entries; np != NULL; np = np->e_sibling) { 541 if (np->e_type == LEAF) { 542 if (np->e_flags != 0) 543 badentry(np, "unreferenced with flags"); 544 dprintf(stdout, 545 "%s: remove unreferenced name\n", 546 myname(np)); 547 removeleaf(np); 548 freeentry(np); 549 } 550 } 551 } 552 } 553 554 /* 555 * Remove old nodes (directories). 556 * Note that this routine runs in O(N*D) where: 557 * N is the number of directory entries to be removed. 558 * D is the maximum depth of the tree. 559 * If N == D this can be quite slow. If the list were 560 * topologically sorted, the deletion could be done in 561 * time O(N). 562 */ 563 void 564 removeoldnodes(void) 565 { 566 struct entry *ep, **prev; 567 long change; 568 569 vprintf(stdout, "Remove old nodes (directories).\n"); 570 do { 571 change = 0; 572 prev = &removelist; 573 for (ep = removelist; ep != NULL; ep = *prev) { 574 if (ep->e_entries != NULL) { 575 prev = &ep->e_next; 576 continue; 577 } 578 *prev = ep->e_next; 579 removenode(ep); 580 freeentry(ep); 581 change++; 582 } 583 } while (change); 584 for (ep = removelist; ep != NULL; ep = ep->e_next) 585 badentry(ep, "cannot remove, non-empty"); 586 } 587 588 /* 589 * This is the routine used to extract files for the 'r' command. 590 * Extract new leaves. 591 */ 592 void 593 createleaves(const char *symtabfile) 594 { 595 struct entry *ep; 596 ino_t first; 597 long curvol; 598 599 if (command == 'R') { 600 vprintf(stdout, "Continue extraction of new leaves\n"); 601 } else { 602 vprintf(stdout, "Extract new leaves.\n"); 603 dumpsymtable(symtabfile, volno); 604 } 605 first = lowerbnd(UFS_ROOTINO); 606 curvol = volno; 607 while (curfile.ino < maxino) { 608 first = lowerbnd(first); 609 /* 610 * If the next available file is not the one which we 611 * expect then we have missed one or more files. Since 612 * we do not request files that were not on the tape, 613 * the lost files must have been due to a tape read error, 614 * or a file that was removed while the dump was in progress. 615 */ 616 while (first < curfile.ino) { 617 ep = lookupino(first); 618 if (ep == NULL) 619 panic("%ju: bad first\n", 620 (uintmax_t)first); 621 fprintf(stderr, "%s: not found on tape\n", myname(ep)); 622 ep->e_flags &= ~(NEW|EXTRACT); 623 first = lowerbnd(first); 624 } 625 /* 626 * If we find files on the tape that have no corresponding 627 * directory entries, then we must have found a file that 628 * was created while the dump was in progress. Since we have 629 * no name for it, we discard it knowing that it will be 630 * on the next incremental tape. 631 */ 632 if (first != curfile.ino) { 633 fprintf(stderr, "expected next file %ju, got %ju\n", 634 (uintmax_t)first, 635 (uintmax_t)curfile.ino); 636 skipfile(); 637 goto next; 638 } 639 ep = lookupino(curfile.ino); 640 if (ep == NULL) 641 panic("unknown file on tape\n"); 642 if ((ep->e_flags & (NEW|EXTRACT)) == 0) 643 badentry(ep, "unexpected file on tape"); 644 /* 645 * If the file is to be extracted, then the old file must 646 * be removed since its type may change from one leaf type 647 * to another (eg "file" to "character special"). 648 */ 649 if ((ep->e_flags & EXTRACT) != 0) { 650 removeleaf(ep); 651 ep->e_flags &= ~REMOVED; 652 } 653 (void) extractfile(myname(ep)); 654 ep->e_flags &= ~(NEW|EXTRACT); 655 /* 656 * We checkpoint the restore after every tape reel, so 657 * as to simplify the amount of work re quired by the 658 * 'R' command. 659 */ 660 next: 661 if (curvol != volno) { 662 dumpsymtable(symtabfile, volno); 663 skipmaps(); 664 curvol = volno; 665 } 666 } 667 } 668 669 /* 670 * This is the routine used to extract files for the 'x' and 'i' commands. 671 * Efficiently extract a subset of the files on a tape. 672 */ 673 void 674 createfiles(void) 675 { 676 ino_t first, next, last; 677 struct entry *ep; 678 long curvol; 679 680 vprintf(stdout, "Extract requested files\n"); 681 curfile.action = SKIP; 682 getvol((long)1); 683 skipmaps(); 684 skipdirs(); 685 first = lowerbnd(UFS_ROOTINO); 686 last = upperbnd(maxino - 1); 687 688 new_volume: 689 /* 690 * Decide on the next inode needed in this volume. 691 */ 692 next = lowerbnd(curfile.ino); 693 for (;;) { 694 first = lowerbnd(first); 695 last = upperbnd(last); 696 /* 697 * Check to see if any files remain to be extracted 698 */ 699 if (first > last) 700 return; 701 /* 702 * Reject any volumes with inodes greater 703 * than the last one needed 704 */ 705 if (curfile.ino > last) { 706 do { 707 curfile.action = SKIP; 708 getvol((long)0); 709 skipmaps(); 710 skipdirs(); 711 } while (curfile.ino > last); 712 goto new_volume; 713 } 714 /* 715 * Skip across the inodes until the next inode is found 716 * or an out of order volume change is encountered 717 */ 718 do { 719 curvol = volno; 720 while (next > curfile.ino && volno == curvol) 721 skipfile(); 722 skipmaps(); 723 skipdirs(); 724 } while (volno == curvol + 1); 725 /* 726 * If volume change out of order occurred the 727 * current state must be recalculated 728 */ 729 if (volno != curvol) 730 goto new_volume; 731 /* 732 * If the current inode is greater than the one we were 733 * looking for then we missed the one we were looking for. 734 * Since we only attempt to extract files listed in the 735 * dump map, the lost files must have been due to a tape 736 * read error, or a file that was removed while the dump 737 * was in progress. Thus we report all requested files 738 * between the one we were looking for, and the one we 739 * found as missing, and delete their request flags. 740 */ 741 while (next < curfile.ino) { 742 ep = lookupino(next); 743 if (ep == NULL) 744 panic("corrupted symbol table\n"); 745 fprintf(stderr, "%s: not found on tape\n", myname(ep)); 746 ep->e_flags &= ~NEW; 747 next = lowerbnd(next); 748 } 749 /* 750 * The current inode is the one that we are looking for, 751 * so extract it per its requested name. 752 */ 753 if (next == curfile.ino && next <= last) { 754 ep = lookupino(next); 755 if (ep == NULL) 756 panic("corrupted symbol table\n"); 757 (void) extractfile(myname(ep)); 758 ep->e_flags &= ~NEW; 759 if (volno != curvol) { 760 skipmaps(); 761 goto new_volume; 762 } 763 /* 764 * Decide the next inode. Note that curfile.ino 765 * already updated to the next file on the tape, 766 * and we can't used it since it may be greater 767 * than `next'. 768 */ 769 next = lowerbnd(next); 770 } 771 } 772 } 773 774 /* 775 * Add links. 776 */ 777 void 778 createlinks(void) 779 { 780 struct entry *np, *ep; 781 ino_t i; 782 char name[BUFSIZ]; 783 784 if ((ep = lookupino(UFS_WINO)) != NULL) { 785 vprintf(stdout, "Add whiteouts\n"); 786 for ( ; ep != NULL; ep = ep->e_links) { 787 if ((ep->e_flags & NEW) == 0) 788 continue; 789 (void) addwhiteout(myname(ep)); 790 ep->e_flags &= ~NEW; 791 } 792 } 793 vprintf(stdout, "Add links\n"); 794 for (i = UFS_ROOTINO; i < maxino; i++) { 795 ep = lookupino(i); 796 if (ep == NULL) 797 continue; 798 for (np = ep->e_links; np != NULL; np = np->e_links) { 799 if ((np->e_flags & NEW) == 0) 800 continue; 801 (void) strcpy(name, myname(ep)); 802 if (ep->e_type == NODE) { 803 (void) linkit(name, myname(np), SYMLINK); 804 } else { 805 (void) linkit(name, myname(np), HARDLINK); 806 } 807 np->e_flags &= ~NEW; 808 } 809 } 810 } 811 812 /* 813 * Check the symbol table. 814 * We do this to insure that all the requested work was done, and 815 * that no temporary names remain. 816 */ 817 void 818 checkrestore(void) 819 { 820 struct entry *ep; 821 ino_t i; 822 823 vprintf(stdout, "Check the symbol table.\n"); 824 for (i = UFS_WINO; i < maxino; i++) { 825 for (ep = lookupino(i); ep != NULL; ep = ep->e_links) { 826 ep->e_flags &= ~KEEP; 827 if (ep->e_type == NODE) 828 ep->e_flags &= ~(NEW|EXISTED); 829 if (ep->e_flags != 0) 830 badentry(ep, "incomplete operations"); 831 } 832 } 833 } 834 835 /* 836 * Compare with the directory structure on the tape 837 * A paranoid check that things are as they should be. 838 */ 839 long 840 verifyfile(const char *name, ino_t ino, int type) 841 { 842 struct entry *np, *ep; 843 long descend = GOOD; 844 845 ep = lookupname(name); 846 if (ep == NULL) { 847 fprintf(stderr, "Warning: missing name %s\n", name); 848 return (FAIL); 849 } 850 np = lookupino(ino); 851 if (np != ep) 852 descend = FAIL; 853 for ( ; np != NULL; np = np->e_links) 854 if (np == ep) 855 break; 856 if (np == NULL) 857 panic("missing inumber %ju\n", (uintmax_t)ino); 858 if (ep->e_type == LEAF && type != LEAF) 859 badentry(ep, "type should be LEAF"); 860 return (descend); 861 } 862
Indexes created Sun Sep 21 16:09:51 GMT 2025