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 mtimep[2], ctimep[2]; 525 struct entry *ep; 526 527 curfile.name = name; 528 curfile.action = USING; 529 mtimep[0].tv_sec = curfile.atime_sec; 530 mtimep[0].tv_usec = curfile.atime_nsec / 1000; 531 mtimep[1].tv_sec = curfile.mtime_sec; 532 mtimep[1].tv_usec = curfile.mtime_nsec / 1000; 533 ctimep[0].tv_sec = curfile.atime_sec; 534 ctimep[0].tv_usec = curfile.atime_nsec / 1000; 535 ctimep[1].tv_sec = curfile.birthtime_sec; 536 ctimep[1].tv_usec = curfile.birthtime_nsec / 1000; 537 mode = curfile.mode; 538 flags = curfile.file_flags; 539 switch (mode & IFMT) { 540 541 default: 542 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode); 543 skipfile(); 544 return (FAIL); 545 546 case IFSOCK: 547 vprintf(stdout, "skipped socket %s\n", name); 548 skipfile(); 549 return (GOOD); 550 551 case IFDIR: 552 if (mflag) { 553 ep = lookupname(name); 554 if (ep == NULL || ep->e_flags & EXTRACT) 555 panic("unextracted directory %s\n", name); 556 skipfile(); 557 return (GOOD); 558 } 559 vprintf(stdout, "extract file %s\n", name); 560 return (genliteraldir(name, curfile.ino)); 561 562 case IFLNK: 563 lnkbuf[0] = '\0'; 564 pathlen = 0; 565 getfile(xtrlnkfile, xtrlnkskip); 566 if (pathlen == 0) { 567 vprintf(stdout, 568 "%s: zero length symbolic link (ignored)\n", name); 569 return (GOOD); 570 } 571 if (linkit(lnkbuf, name, SYMLINK) == GOOD) { 572 (void) lchown(name, curfile.uid, curfile.gid); 573 (void) lchmod(name, mode); 574 (void) lutimes(name, ctimep); 575 (void) lutimes(name, mtimep); 576 return (GOOD); 577 } 578 return (FAIL); 579 580 case IFIFO: 581 vprintf(stdout, "extract fifo %s\n", name); 582 if (Nflag) { 583 skipfile(); 584 return (GOOD); 585 } 586 if (uflag && !Nflag) 587 (void)unlink(name); 588 if (mkfifo(name, mode) < 0) { 589 fprintf(stderr, "%s: cannot create fifo: %s\n", 590 name, strerror(errno)); 591 skipfile(); 592 return (FAIL); 593 } 594 (void) chown(name, curfile.uid, curfile.gid); 595 (void) chmod(name, mode); 596 (void) utimes(name, ctimep); 597 (void) utimes(name, mtimep); 598 (void) chflags(name, flags); 599 skipfile(); 600 return (GOOD); 601 602 case IFCHR: 603 case IFBLK: 604 vprintf(stdout, "extract special file %s\n", name); 605 if (Nflag) { 606 skipfile(); 607 return (GOOD); 608 } 609 if (uflag) 610 (void)unlink(name); 611 if (mknod(name, mode, (int)curfile.rdev) < 0) { 612 fprintf(stderr, "%s: cannot create special file: %s\n", 613 name, strerror(errno)); 614 skipfile(); 615 return (FAIL); 616 } 617 (void) chown(name, curfile.uid, curfile.gid); 618 (void) chmod(name, mode); 619 (void) utimes(name, ctimep); 620 (void) utimes(name, mtimep); 621 (void) chflags(name, flags); 622 skipfile(); 623 return (GOOD); 624 625 case IFREG: 626 vprintf(stdout, "extract file %s\n", name); 627 if (Nflag) { 628 skipfile(); 629 return (GOOD); 630 } 631 if (uflag) 632 (void)unlink(name); 633 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 634 0666)) < 0) { 635 fprintf(stderr, "%s: cannot create file: %s\n", 636 name, strerror(errno)); 637 skipfile(); 638 return (FAIL); 639 } 640 (void) fchown(ofile, curfile.uid, curfile.gid); 641 (void) fchmod(ofile, mode); 642 getfile(xtrfile, xtrskip); 643 (void) close(ofile); 644 (void) utimes(name, ctimep); 645 (void) utimes(name, mtimep); 646 (void) chflags(name, flags); 647 return (GOOD); 648 } 649 /* NOTREACHED */ 650 } 651 652 /* 653 * skip over bit maps on the tape 654 */ 655 void 656 skipmaps(void) 657 { 658 659 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI) 660 skipfile(); 661 } 662 663 /* 664 * skip over a file on the tape 665 */ 666 void 667 skipfile(void) 668 { 669 670 curfile.action = SKIP; 671 getfile(xtrnull, xtrnull); 672 } 673 674 /* 675 * Extract a file from the tape. 676 * When an allocated block is found it is passed to the fill function; 677 * when an unallocated block (hole) is found, a zeroed buffer is passed 678 * to the skip function. 679 */ 680 void 681 getfile(void (*fill)(char *, long), void (*skip)(char *, long)) 682 { 683 int i; 684 int curblk = 0; 685 quad_t size = spcl.c_size; 686 static char clearedbuf[MAXBSIZE]; 687 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE]; 688 char junk[TP_BSIZE]; 689 690 if (spcl.c_type == TS_END) 691 panic("ran off end of tape\n"); 692 if (spcl.c_magic != FS_UFS2_MAGIC) 693 panic("not at beginning of a file\n"); 694 if (!gettingfile && setjmp(restart) != 0) 695 return; 696 gettingfile++; 697 loop: 698 for (i = 0; i < spcl.c_count; i++) { 699 if (readmapflag || spcl.c_addr[i]) { 700 readtape(&buf[curblk++][0]); 701 if (curblk == fssize / TP_BSIZE) { 702 (*fill)((char *)buf, (long)(size > TP_BSIZE ? 703 fssize : (curblk - 1) * TP_BSIZE + size)); 704 curblk = 0; 705 } 706 } else { 707 if (curblk > 0) { 708 (*fill)((char *)buf, (long)(size > TP_BSIZE ? 709 curblk * TP_BSIZE : 710 (curblk - 1) * TP_BSIZE + size)); 711 curblk = 0; 712 } 713 (*skip)(clearedbuf, (long)(size > TP_BSIZE ? 714 TP_BSIZE : size)); 715 } 716 if ((size -= TP_BSIZE) <= 0) { 717 for (i++; i < spcl.c_count; i++) 718 if (readmapflag || spcl.c_addr[i]) 719 readtape(junk); 720 break; 721 } 722 } 723 if (gethead(&spcl) == GOOD && size > 0) { 724 if (spcl.c_type == TS_ADDR) 725 goto loop; 726 dprintf(stdout, 727 "Missing address (header) block for %s at %ld blocks\n", 728 curfile.name, blksread); 729 } 730 if (curblk > 0) 731 (*fill)((char *)buf, (long)((curblk * TP_BSIZE) + size)); 732 findinode(&spcl); 733 gettingfile = 0; 734 } 735 736 /* 737 * Write out the next block of a file. 738 */ 739 static void 740 xtrfile(char *buf, long size) 741 { 742 743 if (Nflag) 744 return; 745 if (write(ofile, buf, (int) size) == -1) { 746 fprintf(stderr, 747 "write error extracting inode %d, name %s\nwrite: %s\n", 748 curfile.ino, curfile.name, strerror(errno)); 749 } 750 } 751 752 /* 753 * Skip over a hole in a file. 754 */ 755 /* ARGSUSED */ 756 static void 757 xtrskip(char *buf, long size) 758 { 759 760 if (lseek(ofile, size, SEEK_CUR) == -1) { 761 fprintf(stderr, 762 "seek error extracting inode %d, name %s\nlseek: %s\n", 763 curfile.ino, curfile.name, strerror(errno)); 764 done(1); 765 } 766 } 767 768 /* 769 * Collect the next block of a symbolic link. 770 */ 771 static void 772 xtrlnkfile(char *buf, long size) 773 { 774 775 pathlen += size; 776 if (pathlen > MAXPATHLEN) { 777 fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n", 778 curfile.name, lnkbuf, buf, pathlen); 779 done(1); 780 } 781 (void) strcat(lnkbuf, buf); 782 } 783 784 /* 785 * Skip over a hole in a symbolic link (should never happen). 786 */ 787 /* ARGSUSED */ 788 static void 789 xtrlnkskip(char *buf, long size) 790 { 791 792 fprintf(stderr, "unallocated block in symbolic link %s\n", 793 curfile.name); 794 done(1); 795 } 796 797 /* 798 * Collect the next block of a bit map. 799 */ 800 static void 801 xtrmap(char *buf, long size) 802 { 803 804 memmove(map, buf, size); 805 map += size; 806 } 807 808 /* 809 * Skip over a hole in a bit map (should never happen). 810 */ 811 /* ARGSUSED */ 812 static void 813 xtrmapskip(char *buf, long size) 814 { 815 816 panic("hole in map\n"); 817 map += size; 818 } 819 820 /* 821 * Noop, when an extraction function is not needed. 822 */ 823 /* ARGSUSED */ 824 void 825 xtrnull(char *buf, long size) 826 { 827 828 return; 829 } 830 831 /* 832 * Read TP_BSIZE blocks from the input. 833 * Handle read errors, and end of media. 834 */ 835 static void 836 readtape(char *buf) 837 { 838 long rd, newvol, i; 839 int cnt, seek_failed; 840 841 if (blkcnt < numtrec) { 842 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE); 843 blksread++; 844 tapeaddr++; 845 return; 846 } 847 for (i = 0; i < ntrec; i++) 848 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; 849 if (numtrec == 0) 850 numtrec = ntrec; 851 cnt = ntrec * TP_BSIZE; 852 rd = 0; 853 getmore: 854 #ifdef RRESTORE 855 if (host) 856 i = rmtread(&tapebuf[rd], cnt); 857 else 858 #endif 859 i = read(mt, &tapebuf[rd], cnt); 860 /* 861 * Check for mid-tape short read error. 862 * If found, skip rest of buffer and start with the next. 863 */ 864 if (!pipein && numtrec < ntrec && i > 0) { 865 dprintf(stdout, "mid-media short read error.\n"); 866 numtrec = ntrec; 867 } 868 /* 869 * Handle partial block read. 870 */ 871 if (pipein && i == 0 && rd > 0) 872 i = rd; 873 else if (i > 0 && i != ntrec * TP_BSIZE) { 874 if (pipein) { 875 rd += i; 876 cnt -= i; 877 if (cnt > 0) 878 goto getmore; 879 i = rd; 880 } else { 881 /* 882 * Short read. Process the blocks read. 883 */ 884 if (i % TP_BSIZE != 0) 885 vprintf(stdout, 886 "partial block read: %ld should be %ld\n", 887 i, ntrec * TP_BSIZE); 888 numtrec = i / TP_BSIZE; 889 } 890 } 891 /* 892 * Handle read error. 893 */ 894 if (i < 0) { 895 fprintf(stderr, "Tape read error while "); 896 switch (curfile.action) { 897 default: 898 fprintf(stderr, "trying to set up tape\n"); 899 break; 900 case UNKNOWN: 901 fprintf(stderr, "trying to resynchronize\n"); 902 break; 903 case USING: 904 fprintf(stderr, "restoring %s\n", curfile.name); 905 break; 906 case SKIP: 907 fprintf(stderr, "skipping over inode %d\n", 908 curfile.ino); 909 break; 910 } 911 if (!yflag && !reply("continue")) 912 done(1); 913 i = ntrec * TP_BSIZE; 914 memset(tapebuf, 0, i); 915 #ifdef RRESTORE 916 if (host) 917 seek_failed = (rmtseek(i, 1) < 0); 918 else 919 #endif 920 seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1); 921 922 if (seek_failed) { 923 fprintf(stderr, 924 "continuation failed: %s\n", strerror(errno)); 925 done(1); 926 } 927 } 928 /* 929 * Handle end of tape. 930 */ 931 if (i == 0) { 932 vprintf(stdout, "End-of-tape encountered\n"); 933 if (!pipein) { 934 newvol = volno + 1; 935 volno = 0; 936 numtrec = 0; 937 getvol(newvol); 938 readtape(buf); 939 return; 940 } 941 if (rd % TP_BSIZE != 0) 942 panic("partial block read: %d should be %d\n", 943 rd, ntrec * TP_BSIZE); 944 terminateinput(); 945 memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE); 946 } 947 blkcnt = 0; 948 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE); 949 blksread++; 950 tapeaddr++; 951 } 952 953 static void 954 findtapeblksize(void) 955 { 956 long i; 957 958 for (i = 0; i < ntrec; i++) 959 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; 960 blkcnt = 0; 961 #ifdef RRESTORE 962 if (host) 963 i = rmtread(tapebuf, ntrec * TP_BSIZE); 964 else 965 #endif 966 i = read(mt, tapebuf, ntrec * TP_BSIZE); 967 968 if (i <= 0) { 969 fprintf(stderr, "tape read error: %s\n", strerror(errno)); 970 done(1); 971 } 972 if (i % TP_BSIZE != 0) { 973 fprintf(stderr, "Tape block size (%ld) %s (%d)\n", 974 i, "is not a multiple of dump block size", TP_BSIZE); 975 done(1); 976 } 977 ntrec = i / TP_BSIZE; 978 numtrec = ntrec; 979 vprintf(stdout, "Tape block size is %ld\n", ntrec); 980 } 981 982 void 983 closemt(void) 984 { 985 986 if (mt < 0) 987 return; 988 #ifdef RRESTORE 989 if (host) 990 rmtclose(); 991 else 992 #endif 993 (void) close(mt); 994 } 995 996 /* 997 * Read the next block from the tape. 998 * If it is not any valid header, return an error. 999 */ 1000 static int 1001 gethead(struct s_spcl *buf) 1002 { 1003 long i; 1004 1005 readtape((char *)buf); 1006 if (buf->c_magic != FS_UFS2_MAGIC && buf->c_magic != NFS_MAGIC) { 1007 if (buf->c_magic == OFS_MAGIC) { 1008 fprintf(stderr, 1009 "Format of dump tape is too old. Must use\n"); 1010 fprintf(stderr, 1011 "a version of restore from before 2002.\n"); 1012 return (FAIL); 1013 } 1014 if (swabl(buf->c_magic) != FS_UFS2_MAGIC && 1015 buf->c_magic != NFS_MAGIC) { 1016 if (buf->c_magic == OFS_MAGIC) { 1017 fprintf(stderr, 1018 "Format of dump tape is too old. Must use\n"); 1019 fprintf(stderr, 1020 "a version of restore from before 2002.\n"); 1021 } 1022 return (FAIL); 1023 } 1024 if (!Bcvt) { 1025 vprintf(stdout, "Note: Doing Byte swapping\n"); 1026 Bcvt = 1; 1027 } 1028 } 1029 if (checksum((int *)buf) == FAIL) 1030 return (FAIL); 1031 if (Bcvt) { 1032 swabst((u_char *)"8l4s1q8l2q17l", (u_char *)buf); 1033 swabst((u_char *)"l",(u_char *) &buf->c_level); 1034 swabst((u_char *)"2l4q",(u_char *) &buf->c_flags); 1035 } 1036 readmapflag = 0; 1037 1038 switch (buf->c_type) { 1039 1040 case TS_CLRI: 1041 case TS_BITS: 1042 /* 1043 * Have to patch up missing information in bit map headers 1044 */ 1045 buf->c_inumber = 0; 1046 buf->c_size = buf->c_count * TP_BSIZE; 1047 if (buf->c_count > TP_NINDIR) 1048 readmapflag = 1; 1049 else 1050 for (i = 0; i < buf->c_count; i++) 1051 buf->c_addr[i]++; 1052 break; 1053 1054 case TS_TAPE: 1055 case TS_END: 1056 buf->c_inumber = 0; 1057 break; 1058 1059 case TS_INODE: 1060 /* 1061 * For old dump tapes, have to copy up old fields to 1062 * new locations. 1063 */ 1064 if (buf->c_magic == NFS_MAGIC) { 1065 buf->c_tapea = buf->c_old_tapea; 1066 buf->c_firstrec = buf->c_old_firstrec; 1067 buf->c_date = _time32_to_time(buf->c_old_date); 1068 buf->c_ddate = _time32_to_time(buf->c_old_ddate); 1069 buf->c_atime = _time32_to_time(buf->c_old_atime); 1070 buf->c_mtime = _time32_to_time(buf->c_old_mtime); 1071 } 1072 break; 1073 1074 case TS_ADDR: 1075 break; 1076 1077 default: 1078 panic("gethead: unknown inode type %d\n", buf->c_type); 1079 break; 1080 } 1081 buf->c_magic = FS_UFS2_MAGIC; 1082 tapeaddr = buf->c_tapea; 1083 if (dflag) 1084 accthdr(buf); 1085 return(GOOD); 1086 } 1087 1088 /* 1089 * Check that a header is where it belongs and predict the next header 1090 */ 1091 static void 1092 accthdr(struct s_spcl *header) 1093 { 1094 static ino_t previno = 0x7fffffff; 1095 static int prevtype; 1096 static long predict; 1097 long blks, i; 1098 1099 if (header->c_type == TS_TAPE) { 1100 fprintf(stderr, "Volume header "); 1101 if (header->c_firstrec) 1102 fprintf(stderr, "begins with record %qd", 1103 header->c_firstrec); 1104 fprintf(stderr, "\n"); 1105 previno = 0x7fffffff; 1106 return; 1107 } 1108 if (previno == 0x7fffffff) 1109 goto newcalc; 1110 switch (prevtype) { 1111 case TS_BITS: 1112 fprintf(stderr, "Dumped inodes map header"); 1113 break; 1114 case TS_CLRI: 1115 fprintf(stderr, "Used inodes map header"); 1116 break; 1117 case TS_INODE: 1118 fprintf(stderr, "File header, ino %d", previno); 1119 break; 1120 case TS_ADDR: 1121 fprintf(stderr, "File continuation header, ino %d", previno); 1122 break; 1123 case TS_END: 1124 fprintf(stderr, "End of tape header"); 1125 break; 1126 } 1127 if (predict != blksread - 1) 1128 fprintf(stderr, "; predicted %ld blocks, got %ld blocks", 1129 predict, blksread - 1); 1130 fprintf(stderr, "\n"); 1131 newcalc: 1132 blks = 0; 1133 if (header->c_type != TS_END) 1134 for (i = 0; i < header->c_count; i++) 1135 if (readmapflag || header->c_addr[i] != 0) 1136 blks++; 1137 predict = blks; 1138 blksread = 0; 1139 prevtype = header->c_type; 1140 previno = header->c_inumber; 1141 } 1142 1143 /* 1144 * Find an inode header. 1145 * Complain if had to skip. 1146 */ 1147 static void 1148 findinode(struct s_spcl *header) 1149 { 1150 static long skipcnt = 0; 1151 long i; 1152 char buf[TP_BSIZE]; 1153 int htype; 1154 1155 curfile.name = "<name unknown>"; 1156 curfile.action = UNKNOWN; 1157 curfile.mode = 0; 1158 curfile.ino = 0; 1159 do { 1160 htype = header->c_type; 1161 switch (htype) { 1162 1163 case TS_ADDR: 1164 /* 1165 * Skip up to the beginning of the next record 1166 */ 1167 for (i = 0; i < header->c_count; i++) 1168 if (header->c_addr[i]) 1169 readtape(buf); 1170 while (gethead(header) == FAIL || 1171 _time64_to_time(header->c_date) != dumpdate) 1172 skipcnt++; 1173 break; 1174 1175 case TS_INODE: 1176 curfile.mode = header->c_mode; 1177 curfile.uid = header->c_uid; 1178 curfile.gid = header->c_gid; 1179 curfile.file_flags = header->c_file_flags; 1180 curfile.rdev = header->c_rdev; 1181 curfile.atime_sec = header->c_atime; 1182 curfile.atime_nsec = header->c_atimensec; 1183 curfile.mtime_sec = header->c_mtime; 1184 curfile.mtime_nsec = header->c_mtimensec; 1185 curfile.birthtime_sec = header->c_birthtime; 1186 curfile.birthtime_nsec = header->c_birthtimensec; 1187 curfile.size = header->c_size; 1188 curfile.ino = header->c_inumber; 1189 break; 1190 1191 case TS_END: 1192 /* If we missed some tapes, get another volume. */ 1193 if (tapesread & (tapesread + 1)) { 1194 getvol(0); 1195 continue; 1196 } 1197 curfile.ino = maxino; 1198 break; 1199 1200 case TS_CLRI: 1201 curfile.name = "<file removal list>"; 1202 break; 1203 1204 case TS_BITS: 1205 curfile.name = "<file dump list>"; 1206 break; 1207 1208 case TS_TAPE: 1209 panic("unexpected tape header\n"); 1210 /* NOTREACHED */ 1211 1212 default: 1213 panic("unknown tape header type %d\n", spcl.c_type); 1214 /* NOTREACHED */ 1215 1216 } 1217 } while (htype == TS_ADDR); 1218 if (skipcnt > 0) 1219 fprintf(stderr, "resync restore, skipped %ld blocks\n", 1220 skipcnt); 1221 skipcnt = 0; 1222 } 1223 1224 static int 1225 checksum(int *buf) 1226 { 1227 int i, j; 1228 1229 j = sizeof(union u_spcl) / sizeof(int); 1230 i = 0; 1231 if (!Bcvt) { 1232 do 1233 i += *buf++; 1234 while (--j); 1235 } else { 1236 /* What happens if we want to read restore tapes 1237 for a 16bit int machine??? */ 1238 do 1239 i += swabl(*buf++); 1240 while (--j); 1241 } 1242 1243 if (i != CHECKSUM) { 1244 fprintf(stderr, "Checksum error %o, inode %d file %s\n", i, 1245 curfile.ino, curfile.name); 1246 return(FAIL); 1247 } 1248 return(GOOD); 1249 } 1250 1251 #ifdef RRESTORE 1252 #include <stdarg.h> 1253 1254 void 1255 msg(const char *fmt, ...) 1256 { 1257 va_list ap; 1258 va_start(ap, fmt); 1259 (void)vfprintf(stderr, fmt, ap); 1260 va_end(ap); 1261 } 1262 #endif /* RRESTORE */ 1263 1264 static u_char * 1265 swabshort(u_char *sp, int n) 1266 { 1267 char c; 1268 1269 while (--n >= 0) { 1270 c = sp[0]; sp[0] = sp[1]; sp[1] = c; 1271 sp += 2; 1272 } 1273 return (sp); 1274 } 1275 1276 static u_char * 1277 swablong(u_char *sp, int n) 1278 { 1279 char c; 1280 1281 while (--n >= 0) { 1282 c = sp[0]; sp[0] = sp[3]; sp[3] = c; 1283 c = sp[2]; sp[2] = sp[1]; sp[1] = c; 1284 sp += 4; 1285 } 1286 return (sp); 1287 } 1288 1289 static u_char * 1290 swabquad(u_char *sp, int n) 1291 { 1292 char c; 1293 1294 while (--n >= 0) { 1295 c = sp[0]; sp[0] = sp[7]; sp[7] = c; 1296 c = sp[1]; sp[1] = sp[6]; sp[6] = c; 1297 c = sp[2]; sp[2] = sp[5]; sp[5] = c; 1298 c = sp[3]; sp[3] = sp[4]; sp[4] = c; 1299 sp += 8; 1300 } 1301 return (sp); 1302 } 1303 1304 void 1305 swabst(u_char *cp, u_char *sp) 1306 { 1307 int n = 0; 1308 1309 while (*cp) { 1310 switch (*cp) { 1311 case '0': case '1': case '2': case '3': case '4': 1312 case '5': case '6': case '7': case '8': case '9': 1313 n = (n * 10) + (*cp++ - '0'); 1314 continue; 1315 1316 case 's': case 'w': case 'h': 1317 if (n == 0) 1318 n = 1; 1319 sp = swabshort(sp, n); 1320 break; 1321 1322 case 'l': 1323 if (n == 0) 1324 n = 1; 1325 sp = swablong(sp, n); 1326 break; 1327 1328 case 'q': 1329 if (n == 0) 1330 n = 1; 1331 sp = swabquad(sp, n); 1332 break; 1333 1334 case 'b': 1335 if (n == 0) 1336 n = 1; 1337 sp += n; 1338 break; 1339 1340 default: 1341 fprintf(stderr, "Unknown conversion character: %c\n", 1342 *cp); 1343 done(0); 1344 break; 1345 } 1346 cp++; 1347 n = 0; 1348 } 1349 } 1350 1351 static u_long 1352 swabl(u_long x) 1353 { 1354 swabst((u_char *)"l", (u_char *)&x); 1355 return (x); 1356 } 1357