1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #ifndef lint 40 #if 0 41 static char sccsid[] = "@(#)tape.c 8.9 (Berkeley) 5/1/95"; 42 #endif 43 static const char rcsid[] = 44 "$FreeBSD$"; 45 #endif /* not lint */ 46 47 #include <sys/param.h> 48 #include <sys/file.h> 49 #include <sys/mtio.h> 50 #include <sys/stat.h> 51 #include <sys/time.h> 52 53 #include <ufs/ufs/dinode.h> 54 #include <protocols/dumprestore.h> 55 56 #include <errno.h> 57 #include <paths.h> 58 #include <setjmp.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <time.h> 63 #include <unistd.h> 64 65 #include "restore.h" 66 #include "extern.h" 67 68 static long fssize = MAXBSIZE; 69 static int mt = -1; 70 static int pipein = 0; 71 static char *magtape; 72 static int blkcnt; 73 static int numtrec; 74 static char *tapebuf; 75 static union u_spcl endoftapemark; 76 static long blksread; /* blocks read since last header */ 77 static int64_t tapeaddr = 0; /* current TP_BSIZE tape record */ 78 static long tapesread; 79 static jmp_buf restart; 80 static int gettingfile = 0; /* restart has a valid frame */ 81 static char *host = NULL; 82 static int readmapflag; 83 84 static int ofile; 85 static char *map; 86 static char lnkbuf[MAXPATHLEN + 1]; 87 static int pathlen; 88 89 int Bcvt; /* Swap Bytes */ 90 91 #define FLUSHTAPEBUF() blkcnt = ntrec + 1 92 93 static void accthdr(struct s_spcl *); 94 static int checksum(int *); 95 static void findinode(struct s_spcl *); 96 static void findtapeblksize(void); 97 static int gethead(struct s_spcl *); 98 static void readtape(char *); 99 static void setdumpnum(void); 100 static u_long swabl(u_long); 101 static u_char *swablong(u_char *, int); 102 static u_char *swabshort(u_char *, int); 103 static void terminateinput(void); 104 static void xtrfile(char *, long); 105 static void xtrlnkfile(char *, long); 106 static void xtrlnkskip(char *, long); 107 static void xtrmap(char *, long); 108 static void xtrmapskip(char *, long); 109 static void xtrskip(char *, long); 110 111 /* 112 * Set up an input source 113 */ 114 void 115 setinput(char *source) 116 { 117 FLUSHTAPEBUF(); 118 if (bflag) 119 newtapebuf(ntrec); 120 else 121 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC); 122 terminal = stdin; 123 124 #ifdef RRESTORE 125 if (strchr(source, ':')) { 126 host = source; 127 source = strchr(host, ':'); 128 *source++ = '\0'; 129 if (rmthost(host) == 0) 130 done(1); 131 } else 132 #endif 133 if (strcmp(source, "-") == 0) { 134 /* 135 * Since input is coming from a pipe we must establish 136 * our own connection to the terminal. 137 */ 138 terminal = fopen(_PATH_TTY, "r"); 139 if (terminal == NULL) { 140 (void)fprintf(stderr, "cannot open %s: %s\n", 141 _PATH_TTY, strerror(errno)); 142 terminal = fopen(_PATH_DEVNULL, "r"); 143 if (terminal == NULL) { 144 (void)fprintf(stderr, "cannot open %s: %s\n", 145 _PATH_DEVNULL, strerror(errno)); 146 done(1); 147 } 148 } 149 pipein++; 150 } 151 setuid(getuid()); /* no longer need or want root privileges */ 152 magtape = strdup(source); 153 if (magtape == NULL) { 154 fprintf(stderr, "Cannot allocate space for magtape buffer\n"); 155 done(1); 156 } 157 } 158 159 void 160 newtapebuf(long size) 161 { 162 static int tapebufsize = -1; 163 164 ntrec = size; 165 if (size <= tapebufsize) 166 return; 167 if (tapebuf != NULL) 168 free(tapebuf); 169 tapebuf = malloc(size * TP_BSIZE); 170 if (tapebuf == NULL) { 171 fprintf(stderr, "Cannot allocate space for tape buffer\n"); 172 done(1); 173 } 174 tapebufsize = size; 175 } 176 177 /* 178 * Verify that the tape drive can be accessed and 179 * that it actually is a dump tape. 180 */ 181 void 182 setup(void) 183 { 184 int i, j, *ip; 185 struct stat stbuf; 186 187 vprintf(stdout, "Verify tape and initialize maps\n"); 188 #ifdef RRESTORE 189 if (host) 190 mt = rmtopen(magtape, 0); 191 else 192 #endif 193 if (pipein) 194 mt = 0; 195 else 196 mt = open(magtape, O_RDONLY, 0); 197 if (mt < 0) { 198 fprintf(stderr, "%s: %s\n", magtape, strerror(errno)); 199 done(1); 200 } 201 volno = 1; 202 setdumpnum(); 203 FLUSHTAPEBUF(); 204 if (!pipein && !bflag) 205 findtapeblksize(); 206 if (gethead(&spcl) == FAIL) { 207 fprintf(stderr, "Tape is not a dump tape\n"); 208 done(1); 209 } 210 if (pipein) { 211 endoftapemark.s_spcl.c_magic = FS_UFS2_MAGIC; 212 endoftapemark.s_spcl.c_type = TS_END; 213 ip = (int *)&endoftapemark; 214 j = sizeof(union u_spcl) / sizeof(int); 215 i = 0; 216 do 217 i += *ip++; 218 while (--j); 219 endoftapemark.s_spcl.c_checksum = CHECKSUM - i; 220 } 221 if (vflag || command == 't') 222 printdumpinfo(); 223 dumptime = _time64_to_time(spcl.c_ddate); 224 dumpdate = _time64_to_time(spcl.c_date); 225 if (stat(".", &stbuf) < 0) { 226 fprintf(stderr, "cannot stat .: %s\n", strerror(errno)); 227 done(1); 228 } 229 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE ) 230 fssize = TP_BSIZE; 231 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE) 232 fssize = stbuf.st_blksize; 233 if (((fssize - 1) & fssize) != 0) { 234 fprintf(stderr, "bad block size %ld\n", fssize); 235 done(1); 236 } 237 if (spcl.c_volume != 1) { 238 fprintf(stderr, "Tape is not volume 1 of the dump\n"); 239 done(1); 240 } 241 if (gethead(&spcl) == FAIL) { 242 dprintf(stdout, "header read failed at %ld blocks\n", blksread); 243 panic("no header after volume mark!\n"); 244 } 245 findinode(&spcl); 246 if (spcl.c_type != TS_CLRI) { 247 fprintf(stderr, "Cannot find file removal list\n"); 248 done(1); 249 } 250 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1; 251 dprintf(stdout, "maxino = %d\n", maxino); 252 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY)); 253 if (map == NULL) 254 panic("no memory for active inode map\n"); 255 usedinomap = map; 256 curfile.action = USING; 257 getfile(xtrmap, xtrmapskip); 258 if (spcl.c_type != TS_BITS) { 259 fprintf(stderr, "Cannot find file dump list\n"); 260 done(1); 261 } 262 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY)); 263 if (map == (char *)NULL) 264 panic("no memory for file dump list\n"); 265 dumpmap = map; 266 curfile.action = USING; 267 getfile(xtrmap, xtrmapskip); 268 /* 269 * If there may be whiteout entries on the tape, pretend that the 270 * whiteout inode exists, so that the whiteout entries can be 271 * extracted. 272 */ 273 SETINO(WINO, dumpmap); 274 /* 'r' restores don't call getvol() for tape 1, so mark it as read. */ 275 if (command == 'r') 276 tapesread = 1; 277 } 278 279 /* 280 * Prompt user to load a new dump volume. 281 * "Nextvol" is the next suggested volume to use. 282 * This suggested volume is enforced when doing full 283 * or incremental restores, but can be overridden by 284 * the user when only extracting a subset of the files. 285 */ 286 void 287 getvol(long nextvol) 288 { 289 int64_t prevtapea; 290 long i, newvol, savecnt; 291 union u_spcl tmpspcl; 292 # define tmpbuf tmpspcl.s_spcl 293 char buf[TP_BSIZE]; 294 295 if (nextvol == 1) { 296 tapesread = 0; 297 gettingfile = 0; 298 } 299 prevtapea = tapeaddr; 300 savecnt = blksread; 301 if (pipein) { 302 if (nextvol != 1) { 303 panic("Changing volumes on pipe input?\n"); 304 /* Avoid looping if we couldn't ask the user. */ 305 if (yflag || ferror(terminal) || feof(terminal)) 306 done(1); 307 } 308 if (volno == 1) 309 return; 310 goto gethdr; 311 } 312 again: 313 if (pipein) 314 done(1); /* pipes do not get a second chance */ 315 if (command == 'R' || command == 'r' || curfile.action != SKIP) 316 newvol = nextvol; 317 else 318 newvol = 0; 319 while (newvol <= 0) { 320 if (tapesread == 0) { 321 fprintf(stderr, "%s%s%s%s%s%s%s", 322 "You have not read any tapes yet.\n", 323 "If you are extracting just a few files,", 324 " start with the last volume\n", 325 "and work towards the first; restore", 326 " can quickly skip tapes that\n", 327 "have no further files to extract.", 328 " Otherwise, begin with volume 1.\n"); 329 } else { 330 fprintf(stderr, "You have read volumes"); 331 strcpy(buf, ": "); 332 for (i = 0; i < 32; i++) 333 if (tapesread & (1 << i)) { 334 fprintf(stderr, "%s%ld", buf, i + 1); 335 strcpy(buf, ", "); 336 } 337 fprintf(stderr, "\n"); 338 } 339 do { 340 fprintf(stderr, "Specify next volume #: "); 341 (void) fflush(stderr); 342 if (fgets(buf, BUFSIZ, terminal) == NULL) 343 done(1); 344 } while (buf[0] == '\n'); 345 newvol = atoi(buf); 346 if (newvol <= 0) { 347 fprintf(stderr, 348 "Volume numbers are positive numerics\n"); 349 } 350 } 351 if (newvol == volno) { 352 tapesread |= 1 << (volno - 1); 353 return; 354 } 355 closemt(); 356 fprintf(stderr, "Mount tape volume %ld\n", newvol); 357 fprintf(stderr, "Enter ``none'' if there are no more tapes\n"); 358 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape); 359 (void) fflush(stderr); 360 if (fgets(buf, BUFSIZ, terminal) == NULL) 361 done(1); 362 if (!strcmp(buf, "none\n")) { 363 terminateinput(); 364 return; 365 } 366 if (buf[0] != '\n') { 367 (void) strcpy(magtape, buf); 368 magtape[strlen(magtape) - 1] = '\0'; 369 } 370 #ifdef RRESTORE 371 if (host) 372 mt = rmtopen(magtape, 0); 373 else 374 #endif 375 mt = open(magtape, O_RDONLY, 0); 376 377 if (mt == -1) { 378 fprintf(stderr, "Cannot open %s\n", magtape); 379 volno = -1; 380 goto again; 381 } 382 gethdr: 383 volno = newvol; 384 setdumpnum(); 385 FLUSHTAPEBUF(); 386 if (gethead(&tmpbuf) == FAIL) { 387 dprintf(stdout, "header read failed at %ld blocks\n", blksread); 388 fprintf(stderr, "tape is not dump tape\n"); 389 volno = 0; 390 goto again; 391 } 392 if (tmpbuf.c_volume != volno) { 393 fprintf(stderr, "Wrong volume (%ld)\n", tmpbuf.c_volume); 394 volno = 0; 395 goto again; 396 } 397 if (_time64_to_time(tmpbuf.c_date) != dumpdate || 398 _time64_to_time(tmpbuf.c_ddate) != dumptime) { 399 time_t t = _time64_to_time(tmpbuf.c_date); 400 fprintf(stderr, "Wrong dump date\n\tgot: %s", ctime(&t)); 401 fprintf(stderr, "\twanted: %s", ctime(&dumpdate)); 402 volno = 0; 403 goto again; 404 } 405 tapesread |= 1 << (volno - 1); 406 blksread = savecnt; 407 /* 408 * If continuing from the previous volume, skip over any 409 * blocks read already at the end of the previous volume. 410 * 411 * If coming to this volume at random, skip to the beginning 412 * of the next record. 413 */ 414 dprintf(stdout, "last rec %qd, tape starts with %qd\n", prevtapea, 415 tmpbuf.c_tapea); 416 if (tmpbuf.c_type == TS_TAPE) { 417 if (curfile.action != USING) { 418 /* 419 * XXX Dump incorrectly sets c_count to 1 in the 420 * volume header of the first tape, so ignore 421 * c_count when volno == 1. 422 */ 423 if (volno != 1) 424 for (i = tmpbuf.c_count; i > 0; i--) 425 readtape(buf); 426 } else if (tmpbuf.c_tapea <= prevtapea) { 427 /* 428 * Normally the value of c_tapea in the volume 429 * header is the record number of the header itself. 430 * However in the volume header following an EOT- 431 * terminated tape, it is the record number of the 432 * first continuation data block (dump bug?). 433 * 434 * The next record we want is `prevtapea + 1'. 435 */ 436 i = prevtapea + 1 - tmpbuf.c_tapea; 437 dprintf(stderr, "Skipping %ld duplicate record%s.\n", 438 i, i > 1 ? "s" : ""); 439 while (--i >= 0) 440 readtape(buf); 441 } 442 } 443 if (curfile.action == USING) { 444 if (volno == 1) 445 panic("active file into volume 1\n"); 446 return; 447 } 448 (void) gethead(&spcl); 449 findinode(&spcl); 450 if (gettingfile) { 451 gettingfile = 0; 452 longjmp(restart, 1); 453 } 454 } 455 456 /* 457 * Handle unexpected EOF. 458 */ 459 static void 460 terminateinput(void) 461 { 462 463 if (gettingfile && curfile.action == USING) { 464 printf("Warning: %s %s\n", 465 "End-of-input encountered while extracting", curfile.name); 466 } 467 curfile.name = "<name unknown>"; 468 curfile.action = UNKNOWN; 469 curfile.mode = 0; 470 curfile.ino = maxino; 471 if (gettingfile) { 472 gettingfile = 0; 473 longjmp(restart, 1); 474 } 475 } 476 477 /* 478 * handle multiple dumps per tape by skipping forward to the 479 * appropriate one. 480 */ 481 static void 482 setdumpnum(void) 483 { 484 struct mtop tcom; 485 486 if (dumpnum == 1 || volno != 1) 487 return; 488 if (pipein) { 489 fprintf(stderr, "Cannot have multiple dumps on pipe input\n"); 490 done(1); 491 } 492 tcom.mt_op = MTFSF; 493 tcom.mt_count = dumpnum - 1; 494 #ifdef RRESTORE 495 if (host) 496 rmtioctl(MTFSF, dumpnum - 1); 497 else 498 #endif 499 if (ioctl(mt, MTIOCTOP, (char *)&tcom) < 0) 500 fprintf(stderr, "ioctl MTFSF: %s\n", strerror(errno)); 501 } 502 503 void 504 printdumpinfo(void) 505 { 506 time_t t; 507 t = _time64_to_time(spcl.c_date); 508 fprintf(stdout, "Dump date: %s", ctime(&t)); 509 t = _time64_to_time(spcl.c_ddate); 510 fprintf(stdout, "Dumped from: %s", 511 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&t)); 512 if (spcl.c_host[0] == '\0') 513 return; 514 fprintf(stderr, "Level %ld dump of %s on %s:%s\n", 515 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev); 516 fprintf(stderr, "Label: %s\n", spcl.c_label); 517 } 518 519 int 520 extractfile(char *name) 521 { 522 int flags; 523 mode_t mode; 524 struct timeval timep[2]; 525 struct entry *ep; 526 527 curfile.name = name; 528 curfile.action = USING; 529 timep[0].tv_sec = curfile.atime_sec; 530 timep[0].tv_usec = curfile.atime_nsec / 1000; 531 timep[1].tv_sec = curfile.mtime_sec; 532 timep[1].tv_usec = curfile.mtime_nsec / 1000; 533 mode = curfile.mode; 534 flags = curfile.file_flags; 535 switch (mode & IFMT) { 536 537 default: 538 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode); 539 skipfile(); 540 return (FAIL); 541 542 case IFSOCK: 543 vprintf(stdout, "skipped socket %s\n", name); 544 skipfile(); 545 return (GOOD); 546 547 case IFDIR: 548 if (mflag) { 549 ep = lookupname(name); 550 if (ep == NULL || ep->e_flags & EXTRACT) 551 panic("unextracted directory %s\n", name); 552 skipfile(); 553 return (GOOD); 554 } 555 vprintf(stdout, "extract file %s\n", name); 556 return (genliteraldir(name, curfile.ino)); 557 558 case IFLNK: 559 lnkbuf[0] = '\0'; 560 pathlen = 0; 561 getfile(xtrlnkfile, xtrlnkskip); 562 if (pathlen == 0) { 563 vprintf(stdout, 564 "%s: zero length symbolic link (ignored)\n", name); 565 return (GOOD); 566 } 567 if (linkit(lnkbuf, name, SYMLINK) == GOOD) { 568 (void) lchown(name, curfile.uid, curfile.gid); 569 (void) lchmod(name, mode); 570 (void) lutimes(name, timep); 571 return (GOOD); 572 } 573 return (FAIL); 574 575 case IFIFO: 576 vprintf(stdout, "extract fifo %s\n", name); 577 if (Nflag) { 578 skipfile(); 579 return (GOOD); 580 } 581 if (uflag && !Nflag) 582 (void)unlink(name); 583 if (mkfifo(name, mode) < 0) { 584 fprintf(stderr, "%s: cannot create fifo: %s\n", 585 name, strerror(errno)); 586 skipfile(); 587 return (FAIL); 588 } 589 (void) chown(name, curfile.uid, curfile.gid); 590 (void) chmod(name, mode); 591 (void) utimes(name, timep); 592 (void) chflags(name, flags); 593 skipfile(); 594 return (GOOD); 595 596 case IFCHR: 597 case IFBLK: 598 vprintf(stdout, "extract special file %s\n", name); 599 if (Nflag) { 600 skipfile(); 601 return (GOOD); 602 } 603 if (uflag) 604 (void)unlink(name); 605 if (mknod(name, mode, (int)curfile.rdev) < 0) { 606 fprintf(stderr, "%s: cannot create special file: %s\n", 607 name, strerror(errno)); 608 skipfile(); 609 return (FAIL); 610 } 611 (void) chown(name, curfile.uid, curfile.gid); 612 (void) chmod(name, mode); 613 (void) utimes(name, timep); 614 (void) chflags(name, flags); 615 skipfile(); 616 return (GOOD); 617 618 case IFREG: 619 vprintf(stdout, "extract file %s\n", name); 620 if (Nflag) { 621 skipfile(); 622 return (GOOD); 623 } 624 if (uflag) 625 (void)unlink(name); 626 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 627 0666)) < 0) { 628 fprintf(stderr, "%s: cannot create file: %s\n", 629 name, strerror(errno)); 630 skipfile(); 631 return (FAIL); 632 } 633 (void) fchown(ofile, curfile.uid, curfile.gid); 634 (void) fchmod(ofile, mode); 635 getfile(xtrfile, xtrskip); 636 (void) close(ofile); 637 utimes(name, timep); 638 (void) chflags(name, flags); 639 return (GOOD); 640 } 641 /* NOTREACHED */ 642 } 643 644 /* 645 * skip over bit maps on the tape 646 */ 647 void 648 skipmaps(void) 649 { 650 651 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI) 652 skipfile(); 653 } 654 655 /* 656 * skip over a file on the tape 657 */ 658 void 659 skipfile(void) 660 { 661 662 curfile.action = SKIP; 663 getfile(xtrnull, xtrnull); 664 } 665 666 /* 667 * Extract a file from the tape. 668 * When an allocated block is found it is passed to the fill function; 669 * when an unallocated block (hole) is found, a zeroed buffer is passed 670 * to the skip function. 671 */ 672 void 673 getfile(void (*fill)(char *, long), void (*skip)(char *, long)) 674 { 675 int i; 676 int curblk = 0; 677 quad_t size = spcl.c_size; 678 static char clearedbuf[MAXBSIZE]; 679 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE]; 680 char junk[TP_BSIZE]; 681 682 if (spcl.c_type == TS_END) 683 panic("ran off end of tape\n"); 684 if (spcl.c_magic != FS_UFS2_MAGIC) 685 panic("not at beginning of a file\n"); 686 if (!gettingfile && setjmp(restart) != 0) 687 return; 688 gettingfile++; 689 loop: 690 for (i = 0; i < spcl.c_count; i++) { 691 if (readmapflag || spcl.c_addr[i]) { 692 readtape(&buf[curblk++][0]); 693 if (curblk == fssize / TP_BSIZE) { 694 (*fill)((char *)buf, (long)(size > TP_BSIZE ? 695 fssize : (curblk - 1) * TP_BSIZE + size)); 696 curblk = 0; 697 } 698 } else { 699 if (curblk > 0) { 700 (*fill)((char *)buf, (long)(size > TP_BSIZE ? 701 curblk * TP_BSIZE : 702 (curblk - 1) * TP_BSIZE + size)); 703 curblk = 0; 704 } 705 (*skip)(clearedbuf, (long)(size > TP_BSIZE ? 706 TP_BSIZE : size)); 707 } 708 if ((size -= TP_BSIZE) <= 0) { 709 for (i++; i < spcl.c_count; i++) 710 if (readmapflag || spcl.c_addr[i]) 711 readtape(junk); 712 break; 713 } 714 } 715 if (gethead(&spcl) == GOOD && size > 0) { 716 if (spcl.c_type == TS_ADDR) 717 goto loop; 718 dprintf(stdout, 719 "Missing address (header) block for %s at %ld blocks\n", 720 curfile.name, blksread); 721 } 722 if (curblk > 0) 723 (*fill)((char *)buf, (long)((curblk * TP_BSIZE) + size)); 724 findinode(&spcl); 725 gettingfile = 0; 726 } 727 728 /* 729 * Write out the next block of a file. 730 */ 731 static void 732 xtrfile(char *buf, long size) 733 { 734 735 if (Nflag) 736 return; 737 if (write(ofile, buf, (int) size) == -1) { 738 fprintf(stderr, 739 "write error extracting inode %d, name %s\nwrite: %s\n", 740 curfile.ino, curfile.name, strerror(errno)); 741 } 742 } 743 744 /* 745 * Skip over a hole in a file. 746 */ 747 /* ARGSUSED */ 748 static void 749 xtrskip(char *buf, long size) 750 { 751 752 if (lseek(ofile, size, SEEK_CUR) == -1) { 753 fprintf(stderr, 754 "seek error extracting inode %d, name %s\nlseek: %s\n", 755 curfile.ino, curfile.name, strerror(errno)); 756 done(1); 757 } 758 } 759 760 /* 761 * Collect the next block of a symbolic link. 762 */ 763 static void 764 xtrlnkfile(char *buf, long size) 765 { 766 767 pathlen += size; 768 if (pathlen > MAXPATHLEN) { 769 fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n", 770 curfile.name, lnkbuf, buf, pathlen); 771 done(1); 772 } 773 (void) strcat(lnkbuf, buf); 774 } 775 776 /* 777 * Skip over a hole in a symbolic link (should never happen). 778 */ 779 /* ARGSUSED */ 780 static void 781 xtrlnkskip(char *buf, long size) 782 { 783 784 fprintf(stderr, "unallocated block in symbolic link %s\n", 785 curfile.name); 786 done(1); 787 } 788 789 /* 790 * Collect the next block of a bit map. 791 */ 792 static void 793 xtrmap(char *buf, long size) 794 { 795 796 memmove(map, buf, size); 797 map += size; 798 } 799 800 /* 801 * Skip over a hole in a bit map (should never happen). 802 */ 803 /* ARGSUSED */ 804 static void 805 xtrmapskip(char *buf, long size) 806 { 807 808 panic("hole in map\n"); 809 map += size; 810 } 811 812 /* 813 * Noop, when an extraction function is not needed. 814 */ 815 /* ARGSUSED */ 816 void 817 xtrnull(char *buf, long size) 818 { 819 820 return; 821 } 822 823 /* 824 * Read TP_BSIZE blocks from the input. 825 * Handle read errors, and end of media. 826 */ 827 static void 828 readtape(char *buf) 829 { 830 long rd, newvol, i; 831 int cnt, seek_failed; 832 833 if (blkcnt < numtrec) { 834 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE); 835 blksread++; 836 tapeaddr++; 837 return; 838 } 839 for (i = 0; i < ntrec; i++) 840 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; 841 if (numtrec == 0) 842 numtrec = ntrec; 843 cnt = ntrec * TP_BSIZE; 844 rd = 0; 845 getmore: 846 #ifdef RRESTORE 847 if (host) 848 i = rmtread(&tapebuf[rd], cnt); 849 else 850 #endif 851 i = read(mt, &tapebuf[rd], cnt); 852 /* 853 * Check for mid-tape short read error. 854 * If found, skip rest of buffer and start with the next. 855 */ 856 if (!pipein && numtrec < ntrec && i > 0) { 857 dprintf(stdout, "mid-media short read error.\n"); 858 numtrec = ntrec; 859 } 860 /* 861 * Handle partial block read. 862 */ 863 if (pipein && i == 0 && rd > 0) 864 i = rd; 865 else if (i > 0 && i != ntrec * TP_BSIZE) { 866 if (pipein) { 867 rd += i; 868 cnt -= i; 869 if (cnt > 0) 870 goto getmore; 871 i = rd; 872 } else { 873 /* 874 * Short read. Process the blocks read. 875 */ 876 if (i % TP_BSIZE != 0) 877 vprintf(stdout, 878 "partial block read: %ld should be %ld\n", 879 i, ntrec * TP_BSIZE); 880 numtrec = i / TP_BSIZE; 881 } 882 } 883 /* 884 * Handle read error. 885 */ 886 if (i < 0) { 887 fprintf(stderr, "Tape read error while "); 888 switch (curfile.action) { 889 default: 890 fprintf(stderr, "trying to set up tape\n"); 891 break; 892 case UNKNOWN: 893 fprintf(stderr, "trying to resynchronize\n"); 894 break; 895 case USING: 896 fprintf(stderr, "restoring %s\n", curfile.name); 897 break; 898 case SKIP: 899 fprintf(stderr, "skipping over inode %d\n", 900 curfile.ino); 901 break; 902 } 903 if (!yflag && !reply("continue")) 904 done(1); 905 i = ntrec * TP_BSIZE; 906 memset(tapebuf, 0, i); 907 #ifdef RRESTORE 908 if (host) 909 seek_failed = (rmtseek(i, 1) < 0); 910 else 911 #endif 912 seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1); 913 914 if (seek_failed) { 915 fprintf(stderr, 916 "continuation failed: %s\n", strerror(errno)); 917 done(1); 918 } 919 } 920 /* 921 * Handle end of tape. 922 */ 923 if (i == 0) { 924 vprintf(stdout, "End-of-tape encountered\n"); 925 if (!pipein) { 926 newvol = volno + 1; 927 volno = 0; 928 numtrec = 0; 929 getvol(newvol); 930 readtape(buf); 931 return; 932 } 933 if (rd % TP_BSIZE != 0) 934 panic("partial block read: %d should be %d\n", 935 rd, ntrec * TP_BSIZE); 936 terminateinput(); 937 memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE); 938 } 939 blkcnt = 0; 940 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE); 941 blksread++; 942 tapeaddr++; 943 } 944 945 static void 946 findtapeblksize(void) 947 { 948 long i; 949 950 for (i = 0; i < ntrec; i++) 951 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; 952 blkcnt = 0; 953 #ifdef RRESTORE 954 if (host) 955 i = rmtread(tapebuf, ntrec * TP_BSIZE); 956 else 957 #endif 958 i = read(mt, tapebuf, ntrec * TP_BSIZE); 959 960 if (i <= 0) { 961 fprintf(stderr, "tape read error: %s\n", strerror(errno)); 962 done(1); 963 } 964 if (i % TP_BSIZE != 0) { 965 fprintf(stderr, "Tape block size (%ld) %s (%d)\n", 966 i, "is not a multiple of dump block size", TP_BSIZE); 967 done(1); 968 } 969 ntrec = i / TP_BSIZE; 970 numtrec = ntrec; 971 vprintf(stdout, "Tape block size is %ld\n", ntrec); 972 } 973 974 void 975 closemt(void) 976 { 977 978 if (mt < 0) 979 return; 980 #ifdef RRESTORE 981 if (host) 982 rmtclose(); 983 else 984 #endif 985 (void) close(mt); 986 } 987 988 /* 989 * Read the next block from the tape. 990 * If it is not any valid header, return an error. 991 */ 992 static int 993 gethead(struct s_spcl *buf) 994 { 995 long i; 996 997 readtape((char *)buf); 998 if (buf->c_magic != FS_UFS2_MAGIC && buf->c_magic != NFS_MAGIC) { 999 if (buf->c_magic == OFS_MAGIC) { 1000 fprintf(stderr, 1001 "Format of dump tape is too old. Must use\n"); 1002 fprintf(stderr, 1003 "a version of restore from before 2002.\n"); 1004 return (FAIL); 1005 } 1006 if (swabl(buf->c_magic) != FS_UFS2_MAGIC && 1007 buf->c_magic != NFS_MAGIC) { 1008 if (buf->c_magic == OFS_MAGIC) { 1009 fprintf(stderr, 1010 "Format of dump tape is too old. Must use\n"); 1011 fprintf(stderr, 1012 "a version of restore from before 2002.\n"); 1013 } 1014 return (FAIL); 1015 } 1016 if (!Bcvt) { 1017 vprintf(stdout, "Note: Doing Byte swapping\n"); 1018 Bcvt = 1; 1019 } 1020 } 1021 if (checksum((int *)buf) == FAIL) 1022 return (FAIL); 1023 if (Bcvt) { 1024 swabst((u_char *)"8l4s1q8l2q17l", (u_char *)buf); 1025 swabst((u_char *)"l",(u_char *) &buf->c_level); 1026 swabst((u_char *)"2l4q",(u_char *) &buf->c_flags); 1027 } 1028 readmapflag = 0; 1029 1030 switch (buf->c_type) { 1031 1032 case TS_CLRI: 1033 case TS_BITS: 1034 /* 1035 * Have to patch up missing information in bit map headers 1036 */ 1037 buf->c_inumber = 0; 1038 buf->c_size = buf->c_count * TP_BSIZE; 1039 if (buf->c_count > TP_NINDIR) 1040 readmapflag = 1; 1041 else 1042 for (i = 0; i < buf->c_count; i++) 1043 buf->c_addr[i]++; 1044 break; 1045 1046 case TS_TAPE: 1047 case TS_END: 1048 buf->c_inumber = 0; 1049 break; 1050 1051 case TS_INODE: 1052 /* 1053 * For old dump tapes, have to copy up old fields to 1054 * new locations. 1055 */ 1056 if (buf->c_magic == NFS_MAGIC) { 1057 buf->c_tapea = buf->c_old_tapea; 1058 buf->c_firstrec = buf->c_old_firstrec; 1059 buf->c_date = _time32_to_time(buf->c_old_date); 1060 buf->c_ddate = _time32_to_time(buf->c_old_ddate); 1061 buf->c_atime = _time32_to_time(buf->c_old_atime); 1062 buf->c_mtime = _time32_to_time(buf->c_old_mtime); 1063 } 1064 break; 1065 1066 case TS_ADDR: 1067 break; 1068 1069 default: 1070 panic("gethead: unknown inode type %d\n", buf->c_type); 1071 break; 1072 } 1073 buf->c_magic = FS_UFS2_MAGIC; 1074 tapeaddr = buf->c_tapea; 1075 if (dflag) 1076 accthdr(buf); 1077 return(GOOD); 1078 } 1079 1080 /* 1081 * Check that a header is where it belongs and predict the next header 1082 */ 1083 static void 1084 accthdr(struct s_spcl *header) 1085 { 1086 static ino_t previno = 0x7fffffff; 1087 static int prevtype; 1088 static long predict; 1089 long blks, i; 1090 1091 if (header->c_type == TS_TAPE) { 1092 fprintf(stderr, "Volume header "); 1093 if (header->c_firstrec) 1094 fprintf(stderr, "begins with record %qd", 1095 header->c_firstrec); 1096 fprintf(stderr, "\n"); 1097 previno = 0x7fffffff; 1098 return; 1099 } 1100 if (previno == 0x7fffffff) 1101 goto newcalc; 1102 switch (prevtype) { 1103 case TS_BITS: 1104 fprintf(stderr, "Dumped inodes map header"); 1105 break; 1106 case TS_CLRI: 1107 fprintf(stderr, "Used inodes map header"); 1108 break; 1109 case TS_INODE: 1110 fprintf(stderr, "File header, ino %d", previno); 1111 break; 1112 case TS_ADDR: 1113 fprintf(stderr, "File continuation header, ino %d", previno); 1114 break; 1115 case TS_END: 1116 fprintf(stderr, "End of tape header"); 1117 break; 1118 } 1119 if (predict != blksread - 1) 1120 fprintf(stderr, "; predicted %ld blocks, got %ld blocks", 1121 predict, blksread - 1); 1122 fprintf(stderr, "\n"); 1123 newcalc: 1124 blks = 0; 1125 if (header->c_type != TS_END) 1126 for (i = 0; i < header->c_count; i++) 1127 if (readmapflag || header->c_addr[i] != 0) 1128 blks++; 1129 predict = blks; 1130 blksread = 0; 1131 prevtype = header->c_type; 1132 previno = header->c_inumber; 1133 } 1134 1135 /* 1136 * Find an inode header. 1137 * Complain if had to skip. 1138 */ 1139 static void 1140 findinode(struct s_spcl *header) 1141 { 1142 static long skipcnt = 0; 1143 long i; 1144 char buf[TP_BSIZE]; 1145 int htype; 1146 1147 curfile.name = "<name unknown>"; 1148 curfile.action = UNKNOWN; 1149 curfile.mode = 0; 1150 curfile.ino = 0; 1151 do { 1152 htype = header->c_type; 1153 switch (htype) { 1154 1155 case TS_ADDR: 1156 /* 1157 * Skip up to the beginning of the next record 1158 */ 1159 for (i = 0; i < header->c_count; i++) 1160 if (header->c_addr[i]) 1161 readtape(buf); 1162 while (gethead(header) == FAIL || 1163 _time64_to_time(header->c_date) != dumpdate) 1164 skipcnt++; 1165 break; 1166 1167 case TS_INODE: 1168 curfile.mode = header->c_mode; 1169 curfile.uid = header->c_uid; 1170 curfile.gid = header->c_gid; 1171 curfile.file_flags = header->c_file_flags; 1172 curfile.rdev = header->c_rdev; 1173 curfile.atime_sec = header->c_atime; 1174 curfile.atime_nsec = header->c_atimensec; 1175 curfile.mtime_sec = header->c_mtime; 1176 curfile.mtime_nsec = header->c_mtimensec; 1177 curfile.size = header->c_size; 1178 curfile.ino = header->c_inumber; 1179 break; 1180 1181 case TS_END: 1182 /* If we missed some tapes, get another volume. */ 1183 if (tapesread & (tapesread + 1)) { 1184 getvol(0); 1185 continue; 1186 } 1187 curfile.ino = maxino; 1188 break; 1189 1190 case TS_CLRI: 1191 curfile.name = "<file removal list>"; 1192 break; 1193 1194 case TS_BITS: 1195 curfile.name = "<file dump list>"; 1196 break; 1197 1198 case TS_TAPE: 1199 panic("unexpected tape header\n"); 1200 /* NOTREACHED */ 1201 1202 default: 1203 panic("unknown tape header type %d\n", spcl.c_type); 1204 /* NOTREACHED */ 1205 1206 } 1207 } while (htype == TS_ADDR); 1208 if (skipcnt > 0) 1209 fprintf(stderr, "resync restore, skipped %ld blocks\n", 1210 skipcnt); 1211 skipcnt = 0; 1212 } 1213 1214 static int 1215 checksum(int *buf) 1216 { 1217 int i, j; 1218 1219 j = sizeof(union u_spcl) / sizeof(int); 1220 i = 0; 1221 if (!Bcvt) { 1222 do 1223 i += *buf++; 1224 while (--j); 1225 } else { 1226 /* What happens if we want to read restore tapes 1227 for a 16bit int machine??? */ 1228 do 1229 i += swabl(*buf++); 1230 while (--j); 1231 } 1232 1233 if (i != CHECKSUM) { 1234 fprintf(stderr, "Checksum error %o, inode %d file %s\n", i, 1235 curfile.ino, curfile.name); 1236 return(FAIL); 1237 } 1238 return(GOOD); 1239 } 1240 1241 #ifdef RRESTORE 1242 #include <stdarg.h> 1243 1244 void 1245 msg(const char *fmt, ...) 1246 { 1247 va_list ap; 1248 va_start(ap, fmt); 1249 (void)vfprintf(stderr, fmt, ap); 1250 va_end(ap); 1251 } 1252 #endif /* RRESTORE */ 1253 1254 static u_char * 1255 swabshort(u_char *sp, int n) 1256 { 1257 char c; 1258 1259 while (--n >= 0) { 1260 c = sp[0]; sp[0] = sp[1]; sp[1] = c; 1261 sp += 2; 1262 } 1263 return (sp); 1264 } 1265 1266 static u_char * 1267 swablong(u_char *sp, int n) 1268 { 1269 char c; 1270 1271 while (--n >= 0) { 1272 c = sp[0]; sp[0] = sp[3]; sp[3] = c; 1273 c = sp[2]; sp[2] = sp[1]; sp[1] = c; 1274 sp += 4; 1275 } 1276 return (sp); 1277 } 1278 1279 static u_char * 1280 swabquad(u_char *sp, int n) 1281 { 1282 char c; 1283 1284 while (--n >= 0) { 1285 c = sp[0]; sp[0] = sp[7]; sp[7] = c; 1286 c = sp[1]; sp[1] = sp[6]; sp[6] = c; 1287 c = sp[2]; sp[2] = sp[5]; sp[5] = c; 1288 c = sp[3]; sp[3] = sp[4]; sp[4] = c; 1289 sp += 8; 1290 } 1291 return (sp); 1292 } 1293 1294 void 1295 swabst(u_char *cp, u_char *sp) 1296 { 1297 int n = 0; 1298 1299 while (*cp) { 1300 switch (*cp) { 1301 case '0': case '1': case '2': case '3': case '4': 1302 case '5': case '6': case '7': case '8': case '9': 1303 n = (n * 10) + (*cp++ - '0'); 1304 continue; 1305 1306 case 's': case 'w': case 'h': 1307 if (n == 0) 1308 n = 1; 1309 sp = swabshort(sp, n); 1310 break; 1311 1312 case 'l': 1313 if (n == 0) 1314 n = 1; 1315 sp = swablong(sp, n); 1316 break; 1317 1318 case 'q': 1319 if (n == 0) 1320 n = 1; 1321 sp = swabquad(sp, n); 1322 break; 1323 1324 case 'b': 1325 if (n == 0) 1326 n = 1; 1327 sp += n; 1328 break; 1329 1330 default: 1331 fprintf(stderr, "Unknown conversion character: %c\n", 1332 *cp); 1333 done(0); 1334 break; 1335 } 1336 cp++; 1337 n = 0; 1338 } 1339 } 1340 1341 static u_long 1342 swabl(u_long x) 1343 { 1344 swabst((u_char *)"l", (u_char *)&x); 1345 return (x); 1346 } 1347