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 long 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 83 static int ofile; 84 static char *map; 85 static char lnkbuf[MAXPATHLEN + 1]; 86 static int pathlen; 87 88 int oldinofmt; /* old inode format conversion required */ 89 int Bcvt; /* Swap Bytes (for CCI or sun) */ 90 static int Qcvt; /* Swap quads (for sun) */ 91 92 #define FLUSHTAPEBUF() blkcnt = ntrec + 1 93 94 static void accthdr(struct s_spcl *); 95 static int checksum(int *); 96 static void findinode(struct s_spcl *); 97 static void findtapeblksize(void); 98 static int gethead(struct s_spcl *); 99 static void readtape(char *); 100 static void setdumpnum(void); 101 static u_long swabl(u_long); 102 static u_char *swablong(u_char *, int); 103 static u_char *swabshort(u_char *, int); 104 static void terminateinput(void); 105 static void xtrfile(char *, long); 106 static void xtrlnkfile(char *, long); 107 static void xtrlnkskip(char *, long); 108 static void xtrmap(char *, long); 109 static void xtrmapskip(char *, long); 110 static void xtrskip(char *, long); 111 112 static int readmapflag; 113 114 /* 115 * Set up an input source 116 */ 117 void 118 setinput(char *source) 119 { 120 FLUSHTAPEBUF(); 121 if (bflag) 122 newtapebuf(ntrec); 123 else 124 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC); 125 terminal = stdin; 126 127 #ifdef RRESTORE 128 if (strchr(source, ':')) { 129 host = source; 130 source = strchr(host, ':'); 131 *source++ = '\0'; 132 if (rmthost(host) == 0) 133 done(1); 134 } else 135 #endif 136 if (strcmp(source, "-") == 0) { 137 /* 138 * Since input is coming from a pipe we must establish 139 * our own connection to the terminal. 140 */ 141 terminal = fopen(_PATH_TTY, "r"); 142 if (terminal == NULL) { 143 (void)fprintf(stderr, "cannot open %s: %s\n", 144 _PATH_TTY, strerror(errno)); 145 terminal = fopen(_PATH_DEVNULL, "r"); 146 if (terminal == NULL) { 147 (void)fprintf(stderr, "cannot open %s: %s\n", 148 _PATH_DEVNULL, strerror(errno)); 149 done(1); 150 } 151 } 152 pipein++; 153 } 154 setuid(getuid()); /* no longer need or want root privileges */ 155 magtape = strdup(source); 156 if (magtape == NULL) { 157 fprintf(stderr, "Cannot allocate space for magtape buffer\n"); 158 done(1); 159 } 160 } 161 162 void 163 newtapebuf(long size) 164 { 165 static int tapebufsize = -1; 166 167 ntrec = size; 168 if (size <= tapebufsize) 169 return; 170 if (tapebuf != NULL) 171 free(tapebuf); 172 tapebuf = malloc(size * TP_BSIZE); 173 if (tapebuf == NULL) { 174 fprintf(stderr, "Cannot allocate space for tape buffer\n"); 175 done(1); 176 } 177 tapebufsize = size; 178 } 179 180 /* 181 * Verify that the tape drive can be accessed and 182 * that it actually is a dump tape. 183 */ 184 void 185 setup(void) 186 { 187 int i, j, *ip; 188 struct stat stbuf; 189 190 vprintf(stdout, "Verify tape and initialize maps\n"); 191 #ifdef RRESTORE 192 if (host) 193 mt = rmtopen(magtape, 0); 194 else 195 #endif 196 if (pipein) 197 mt = 0; 198 else 199 mt = open(magtape, O_RDONLY, 0); 200 if (mt < 0) { 201 fprintf(stderr, "%s: %s\n", magtape, strerror(errno)); 202 done(1); 203 } 204 volno = 1; 205 setdumpnum(); 206 FLUSHTAPEBUF(); 207 if (!pipein && !bflag) 208 findtapeblksize(); 209 if (gethead(&spcl) == FAIL) { 210 blkcnt--; /* push back this block */ 211 blksread--; 212 cvtflag++; 213 if (gethead(&spcl) == FAIL) { 214 fprintf(stderr, "Tape is not a dump tape\n"); 215 done(1); 216 } 217 fprintf(stderr, "Converting to new filesystem format.\n"); 218 } 219 if (pipein) { 220 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC; 221 endoftapemark.s_spcl.c_type = TS_END; 222 ip = (int *)&endoftapemark; 223 j = sizeof(union u_spcl) / sizeof(int); 224 i = 0; 225 do 226 i += *ip++; 227 while (--j); 228 endoftapemark.s_spcl.c_checksum = CHECKSUM - i; 229 } 230 if (vflag || command == 't') 231 printdumpinfo(); 232 dumptime = _time32_to_time(spcl.c_ddate); 233 dumpdate = _time32_to_time(spcl.c_date); 234 if (stat(".", &stbuf) < 0) { 235 fprintf(stderr, "cannot stat .: %s\n", strerror(errno)); 236 done(1); 237 } 238 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE ) 239 fssize = TP_BSIZE; 240 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE) 241 fssize = stbuf.st_blksize; 242 if (((fssize - 1) & fssize) != 0) { 243 fprintf(stderr, "bad block size %ld\n", fssize); 244 done(1); 245 } 246 if (spcl.c_volume != 1) { 247 fprintf(stderr, "Tape is not volume 1 of the dump\n"); 248 done(1); 249 } 250 if (gethead(&spcl) == FAIL) { 251 dprintf(stdout, "header read failed at %ld blocks\n", blksread); 252 panic("no header after volume mark!\n"); 253 } 254 findinode(&spcl); 255 if (spcl.c_type != TS_CLRI) { 256 fprintf(stderr, "Cannot find file removal list\n"); 257 done(1); 258 } 259 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1; 260 dprintf(stdout, "maxino = %d\n", maxino); 261 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY)); 262 if (map == NULL) 263 panic("no memory for active inode map\n"); 264 usedinomap = map; 265 curfile.action = USING; 266 getfile(xtrmap, xtrmapskip); 267 if (spcl.c_type != TS_BITS) { 268 fprintf(stderr, "Cannot find file dump list\n"); 269 done(1); 270 } 271 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY)); 272 if (map == (char *)NULL) 273 panic("no memory for file dump list\n"); 274 dumpmap = map; 275 curfile.action = USING; 276 getfile(xtrmap, xtrmapskip); 277 /* 278 * If there may be whiteout entries on the tape, pretend that the 279 * whiteout inode exists, so that the whiteout entries can be 280 * extracted. 281 */ 282 if (oldinofmt == 0) 283 SETINO(WINO, dumpmap); 284 /* 'r' restores don't call getvol() for tape 1, so mark it as read. */ 285 if (command == 'r') 286 tapesread = 1; 287 } 288 289 /* 290 * Prompt user to load a new dump volume. 291 * "Nextvol" is the next suggested volume to use. 292 * This suggested volume is enforced when doing full 293 * or incremental restores, but can be overridden by 294 * the user when only extracting a subset of the files. 295 */ 296 void 297 getvol(long nextvol) 298 { 299 long newvol, prevtapea, savecnt, i; 300 union u_spcl tmpspcl; 301 # define tmpbuf tmpspcl.s_spcl 302 char buf[TP_BSIZE]; 303 304 if (nextvol == 1) { 305 tapesread = 0; 306 gettingfile = 0; 307 } 308 prevtapea = tapeaddr; 309 savecnt = blksread; 310 if (pipein) { 311 if (nextvol != 1) { 312 panic("Changing volumes on pipe input?\n"); 313 /* Avoid looping if we couldn't ask the user. */ 314 if (yflag || ferror(terminal) || feof(terminal)) 315 done(1); 316 } 317 if (volno == 1) 318 return; 319 goto gethdr; 320 } 321 again: 322 if (pipein) 323 done(1); /* pipes do not get a second chance */ 324 if (command == 'R' || command == 'r' || curfile.action != SKIP) 325 newvol = nextvol; 326 else 327 newvol = 0; 328 while (newvol <= 0) { 329 if (tapesread == 0) { 330 fprintf(stderr, "%s%s%s%s%s%s%s", 331 "You have not read any tapes yet.\n", 332 "If you are extracting just a few files,", 333 " start with the last volume\n", 334 "and work towards the first; restore", 335 " can quickly skip tapes that\n", 336 "have no further files to extract.", 337 " Otherwise, begin with volume 1.\n"); 338 } else { 339 fprintf(stderr, "You have read volumes"); 340 strcpy(buf, ": "); 341 for (i = 0; i < 32; i++) 342 if (tapesread & (1 << i)) { 343 fprintf(stderr, "%s%ld", buf, i + 1); 344 strcpy(buf, ", "); 345 } 346 fprintf(stderr, "\n"); 347 } 348 do { 349 fprintf(stderr, "Specify next volume #: "); 350 (void) fflush(stderr); 351 if (fgets(buf, BUFSIZ, terminal) == NULL) 352 done(1); 353 } while (buf[0] == '\n'); 354 newvol = atoi(buf); 355 if (newvol <= 0) { 356 fprintf(stderr, 357 "Volume numbers are positive numerics\n"); 358 } 359 } 360 if (newvol == volno) { 361 tapesread |= 1 << (volno - 1); 362 return; 363 } 364 closemt(); 365 fprintf(stderr, "Mount tape volume %ld\n", newvol); 366 fprintf(stderr, "Enter ``none'' if there are no more tapes\n"); 367 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape); 368 (void) fflush(stderr); 369 if (fgets(buf, BUFSIZ, terminal) == NULL) 370 done(1); 371 if (!strcmp(buf, "none\n")) { 372 terminateinput(); 373 return; 374 } 375 if (buf[0] != '\n') { 376 (void) strcpy(magtape, buf); 377 magtape[strlen(magtape) - 1] = '\0'; 378 } 379 #ifdef RRESTORE 380 if (host) 381 mt = rmtopen(magtape, 0); 382 else 383 #endif 384 mt = open(magtape, O_RDONLY, 0); 385 386 if (mt == -1) { 387 fprintf(stderr, "Cannot open %s\n", magtape); 388 volno = -1; 389 goto again; 390 } 391 gethdr: 392 volno = newvol; 393 setdumpnum(); 394 FLUSHTAPEBUF(); 395 if (gethead(&tmpbuf) == FAIL) { 396 dprintf(stdout, "header read failed at %ld blocks\n", blksread); 397 fprintf(stderr, "tape is not dump tape\n"); 398 volno = 0; 399 goto again; 400 } 401 if (tmpbuf.c_volume != volno) { 402 fprintf(stderr, "Wrong volume (%ld)\n", tmpbuf.c_volume); 403 volno = 0; 404 goto again; 405 } 406 if (_time32_to_time(tmpbuf.c_date) != dumpdate || 407 _time32_to_time(tmpbuf.c_ddate) != dumptime) { 408 time_t t = _time32_to_time(tmpbuf.c_date); 409 fprintf(stderr, "Wrong dump date\n\tgot: %s", ctime(&t)); 410 fprintf(stderr, "\twanted: %s", ctime(&dumpdate)); 411 volno = 0; 412 goto again; 413 } 414 tapesread |= 1 << (volno - 1); 415 blksread = savecnt; 416 /* 417 * If continuing from the previous volume, skip over any 418 * blocks read already at the end of the previous volume. 419 * 420 * If coming to this volume at random, skip to the beginning 421 * of the next record. 422 */ 423 dprintf(stdout, "last rec %ld, tape starts with %ld\n", prevtapea, 424 tmpbuf.c_tapea); 425 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) { 426 if (curfile.action != USING) { 427 /* 428 * XXX Dump incorrectly sets c_count to 1 in the 429 * volume header of the first tape, so ignore 430 * c_count when volno == 1. 431 */ 432 if (volno != 1) 433 for (i = tmpbuf.c_count; i > 0; i--) 434 readtape(buf); 435 } else if (tmpbuf.c_tapea <= prevtapea) { 436 /* 437 * Normally the value of c_tapea in the volume 438 * header is the record number of the header itself. 439 * However in the volume header following an EOT- 440 * terminated tape, it is the record number of the 441 * first continuation data block (dump bug?). 442 * 443 * The next record we want is `prevtapea + 1'. 444 */ 445 i = prevtapea + 1 - tmpbuf.c_tapea; 446 dprintf(stderr, "Skipping %ld duplicate record%s.\n", 447 i, i > 1 ? "s" : ""); 448 while (--i >= 0) 449 readtape(buf); 450 } 451 } 452 if (curfile.action == USING) { 453 if (volno == 1) 454 panic("active file into volume 1\n"); 455 return; 456 } 457 (void) gethead(&spcl); 458 findinode(&spcl); 459 if (gettingfile) { 460 gettingfile = 0; 461 longjmp(restart, 1); 462 } 463 } 464 465 /* 466 * Handle unexpected EOF. 467 */ 468 static void 469 terminateinput(void) 470 { 471 472 if (gettingfile && curfile.action == USING) { 473 printf("Warning: %s %s\n", 474 "End-of-input encountered while extracting", curfile.name); 475 } 476 curfile.name = "<name unknown>"; 477 curfile.action = UNKNOWN; 478 curfile.dip = NULL; 479 curfile.ino = maxino; 480 if (gettingfile) { 481 gettingfile = 0; 482 longjmp(restart, 1); 483 } 484 } 485 486 /* 487 * handle multiple dumps per tape by skipping forward to the 488 * appropriate one. 489 */ 490 static void 491 setdumpnum(void) 492 { 493 struct mtop tcom; 494 495 if (dumpnum == 1 || volno != 1) 496 return; 497 if (pipein) { 498 fprintf(stderr, "Cannot have multiple dumps on pipe input\n"); 499 done(1); 500 } 501 tcom.mt_op = MTFSF; 502 tcom.mt_count = dumpnum - 1; 503 #ifdef RRESTORE 504 if (host) 505 rmtioctl(MTFSF, dumpnum - 1); 506 else 507 #endif 508 if (ioctl(mt, MTIOCTOP, (char *)&tcom) < 0) 509 fprintf(stderr, "ioctl MTFSF: %s\n", strerror(errno)); 510 } 511 512 void 513 printdumpinfo(void) 514 { 515 time_t t; 516 t = _time32_to_time(spcl.c_date); 517 fprintf(stdout, "Dump date: %s", ctime(&t)); 518 t = _time32_to_time(spcl.c_ddate); 519 fprintf(stdout, "Dumped from: %s", 520 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&t)); 521 if (spcl.c_host[0] == '\0') 522 return; 523 fprintf(stderr, "Level %ld dump of %s on %s:%s\n", 524 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev); 525 fprintf(stderr, "Label: %s\n", spcl.c_label); 526 } 527 528 int 529 extractfile(char *name) 530 { 531 int flags; 532 uid_t uid; 533 gid_t gid; 534 mode_t mode; 535 struct timeval timep[2]; 536 struct entry *ep; 537 538 curfile.name = name; 539 curfile.action = USING; 540 timep[0].tv_sec = curfile.dip->di_atime; 541 timep[0].tv_usec = curfile.dip->di_atimensec / 1000; 542 timep[1].tv_sec = curfile.dip->di_mtime; 543 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000; 544 uid = curfile.dip->di_uid; 545 gid = curfile.dip->di_gid; 546 mode = curfile.dip->di_mode; 547 flags = curfile.dip->di_flags; 548 switch (mode & IFMT) { 549 550 default: 551 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode); 552 skipfile(); 553 return (FAIL); 554 555 case IFSOCK: 556 vprintf(stdout, "skipped socket %s\n", name); 557 skipfile(); 558 return (GOOD); 559 560 case IFDIR: 561 if (mflag) { 562 ep = lookupname(name); 563 if (ep == NULL || ep->e_flags & EXTRACT) 564 panic("unextracted directory %s\n", name); 565 skipfile(); 566 return (GOOD); 567 } 568 vprintf(stdout, "extract file %s\n", name); 569 return (genliteraldir(name, curfile.ino)); 570 571 case IFLNK: 572 lnkbuf[0] = '\0'; 573 pathlen = 0; 574 getfile(xtrlnkfile, xtrlnkskip); 575 if (pathlen == 0) { 576 vprintf(stdout, 577 "%s: zero length symbolic link (ignored)\n", name); 578 return (GOOD); 579 } 580 if (linkit(lnkbuf, name, SYMLINK) == GOOD) { 581 (void) lchown(name, uid, gid); 582 (void) lchmod(name, mode); 583 (void) lutimes(name, timep); 584 return (GOOD); 585 } 586 return (FAIL); 587 588 case IFIFO: 589 vprintf(stdout, "extract fifo %s\n", name); 590 if (Nflag) { 591 skipfile(); 592 return (GOOD); 593 } 594 if (uflag && !Nflag) 595 (void)unlink(name); 596 if (mkfifo(name, mode) < 0) { 597 fprintf(stderr, "%s: cannot create fifo: %s\n", 598 name, strerror(errno)); 599 skipfile(); 600 return (FAIL); 601 } 602 (void) chown(name, uid, gid); 603 (void) chmod(name, mode); 604 (void) utimes(name, timep); 605 (void) chflags(name, flags); 606 skipfile(); 607 return (GOOD); 608 609 case IFCHR: 610 case IFBLK: 611 vprintf(stdout, "extract special file %s\n", name); 612 if (Nflag) { 613 skipfile(); 614 return (GOOD); 615 } 616 if (uflag) 617 (void)unlink(name); 618 if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) { 619 fprintf(stderr, "%s: cannot create special file: %s\n", 620 name, strerror(errno)); 621 skipfile(); 622 return (FAIL); 623 } 624 (void) chown(name, uid, gid); 625 (void) chmod(name, mode); 626 (void) utimes(name, timep); 627 (void) chflags(name, flags); 628 skipfile(); 629 return (GOOD); 630 631 case IFREG: 632 vprintf(stdout, "extract file %s\n", name); 633 if (Nflag) { 634 skipfile(); 635 return (GOOD); 636 } 637 if (uflag) 638 (void)unlink(name); 639 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 640 0666)) < 0) { 641 fprintf(stderr, "%s: cannot create file: %s\n", 642 name, strerror(errno)); 643 skipfile(); 644 return (FAIL); 645 } 646 (void) fchown(ofile, uid, gid); 647 (void) fchmod(ofile, mode); 648 getfile(xtrfile, xtrskip); 649 (void) close(ofile); 650 utimes(name, timep); 651 (void) chflags(name, flags); 652 return (GOOD); 653 } 654 /* NOTREACHED */ 655 } 656 657 /* 658 * skip over bit maps on the tape 659 */ 660 void 661 skipmaps(void) 662 { 663 664 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI) 665 skipfile(); 666 } 667 668 /* 669 * skip over a file on the tape 670 */ 671 void 672 skipfile(void) 673 { 674 675 curfile.action = SKIP; 676 getfile(xtrnull, xtrnull); 677 } 678 679 /* 680 * Extract a file from the tape. 681 * When an allocated block is found it is passed to the fill function; 682 * when an unallocated block (hole) is found, a zeroed buffer is passed 683 * to the skip function. 684 */ 685 void 686 getfile(void (*fill)(char *, long), void (*skip)(char *, long)) 687 { 688 int i; 689 int curblk = 0; 690 quad_t size = spcl.c_dinode.di_size; 691 static char clearedbuf[MAXBSIZE]; 692 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE]; 693 char junk[TP_BSIZE]; 694 695 if (spcl.c_type == TS_END) 696 panic("ran off end of tape\n"); 697 if (spcl.c_magic != NFS_MAGIC) 698 panic("not at beginning of a file\n"); 699 if (!gettingfile && setjmp(restart) != 0) 700 return; 701 gettingfile++; 702 loop: 703 for (i = 0; i < spcl.c_count; i++) { 704 if (readmapflag || spcl.c_addr[i]) { 705 readtape(&buf[curblk++][0]); 706 if (curblk == fssize / TP_BSIZE) { 707 (*fill)((char *)buf, (long)(size > TP_BSIZE ? 708 fssize : (curblk - 1) * TP_BSIZE + size)); 709 curblk = 0; 710 } 711 } else { 712 if (curblk > 0) { 713 (*fill)((char *)buf, (long)(size > TP_BSIZE ? 714 curblk * TP_BSIZE : 715 (curblk - 1) * TP_BSIZE + size)); 716 curblk = 0; 717 } 718 (*skip)(clearedbuf, (long)(size > TP_BSIZE ? 719 TP_BSIZE : size)); 720 } 721 if ((size -= TP_BSIZE) <= 0) { 722 for (i++; i < spcl.c_count; i++) 723 if (readmapflag || spcl.c_addr[i]) 724 readtape(junk); 725 break; 726 } 727 } 728 if (gethead(&spcl) == GOOD && size > 0) { 729 if (spcl.c_type == TS_ADDR) 730 goto loop; 731 dprintf(stdout, 732 "Missing address (header) block for %s at %ld blocks\n", 733 curfile.name, blksread); 734 } 735 if (curblk > 0) 736 (*fill)((char *)buf, (long)((curblk * TP_BSIZE) + size)); 737 findinode(&spcl); 738 gettingfile = 0; 739 } 740 741 /* 742 * Write out the next block of a file. 743 */ 744 static void 745 xtrfile(char *buf, long size) 746 { 747 748 if (Nflag) 749 return; 750 if (write(ofile, buf, (int) size) == -1) { 751 fprintf(stderr, 752 "write error extracting inode %d, name %s\nwrite: %s\n", 753 curfile.ino, curfile.name, strerror(errno)); 754 } 755 } 756 757 /* 758 * Skip over a hole in a file. 759 */ 760 /* ARGSUSED */ 761 static void 762 xtrskip(char *buf, long size) 763 { 764 765 if (lseek(ofile, size, SEEK_CUR) == -1) { 766 fprintf(stderr, 767 "seek error extracting inode %d, name %s\nlseek: %s\n", 768 curfile.ino, curfile.name, strerror(errno)); 769 done(1); 770 } 771 } 772 773 /* 774 * Collect the next block of a symbolic link. 775 */ 776 static void 777 xtrlnkfile(char *buf, long size) 778 { 779 780 pathlen += size; 781 if (pathlen > MAXPATHLEN) { 782 fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n", 783 curfile.name, lnkbuf, buf, pathlen); 784 done(1); 785 } 786 (void) strcat(lnkbuf, buf); 787 } 788 789 /* 790 * Skip over a hole in a symbolic link (should never happen). 791 */ 792 /* ARGSUSED */ 793 static void 794 xtrlnkskip(char *buf, long size) 795 { 796 797 fprintf(stderr, "unallocated block in symbolic link %s\n", 798 curfile.name); 799 done(1); 800 } 801 802 /* 803 * Collect the next block of a bit map. 804 */ 805 static void 806 xtrmap(char *buf, long size) 807 { 808 809 memmove(map, buf, size); 810 map += size; 811 } 812 813 /* 814 * Skip over a hole in a bit map (should never happen). 815 */ 816 /* ARGSUSED */ 817 static void 818 xtrmapskip(char *buf, long size) 819 { 820 821 panic("hole in map\n"); 822 map += size; 823 } 824 825 /* 826 * Noop, when an extraction function is not needed. 827 */ 828 /* ARGSUSED */ 829 void 830 xtrnull(char *buf, long size) 831 { 832 833 return; 834 } 835 836 /* 837 * Read TP_BSIZE blocks from the input. 838 * Handle read errors, and end of media. 839 */ 840 static void 841 readtape(char *buf) 842 { 843 long rd, newvol, i; 844 int cnt, seek_failed; 845 846 if (blkcnt < numtrec) { 847 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE); 848 blksread++; 849 tapeaddr++; 850 return; 851 } 852 for (i = 0; i < ntrec; i++) 853 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; 854 if (numtrec == 0) 855 numtrec = ntrec; 856 cnt = ntrec * TP_BSIZE; 857 rd = 0; 858 getmore: 859 #ifdef RRESTORE 860 if (host) 861 i = rmtread(&tapebuf[rd], cnt); 862 else 863 #endif 864 i = read(mt, &tapebuf[rd], cnt); 865 /* 866 * Check for mid-tape short read error. 867 * If found, skip rest of buffer and start with the next. 868 */ 869 if (!pipein && numtrec < ntrec && i > 0) { 870 dprintf(stdout, "mid-media short read error.\n"); 871 numtrec = ntrec; 872 } 873 /* 874 * Handle partial block read. 875 */ 876 if (pipein && i == 0 && rd > 0) 877 i = rd; 878 else if (i > 0 && i != ntrec * TP_BSIZE) { 879 if (pipein) { 880 rd += i; 881 cnt -= i; 882 if (cnt > 0) 883 goto getmore; 884 i = rd; 885 } else { 886 /* 887 * Short read. Process the blocks read. 888 */ 889 if (i % TP_BSIZE != 0) 890 vprintf(stdout, 891 "partial block read: %ld should be %ld\n", 892 i, ntrec * TP_BSIZE); 893 numtrec = i / TP_BSIZE; 894 } 895 } 896 /* 897 * Handle read error. 898 */ 899 if (i < 0) { 900 fprintf(stderr, "Tape read error while "); 901 switch (curfile.action) { 902 default: 903 fprintf(stderr, "trying to set up tape\n"); 904 break; 905 case UNKNOWN: 906 fprintf(stderr, "trying to resynchronize\n"); 907 break; 908 case USING: 909 fprintf(stderr, "restoring %s\n", curfile.name); 910 break; 911 case SKIP: 912 fprintf(stderr, "skipping over inode %d\n", 913 curfile.ino); 914 break; 915 } 916 if (!yflag && !reply("continue")) 917 done(1); 918 i = ntrec * TP_BSIZE; 919 memset(tapebuf, 0, i); 920 #ifdef RRESTORE 921 if (host) 922 seek_failed = (rmtseek(i, 1) < 0); 923 else 924 #endif 925 seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1); 926 927 if (seek_failed) { 928 fprintf(stderr, 929 "continuation failed: %s\n", strerror(errno)); 930 done(1); 931 } 932 } 933 /* 934 * Handle end of tape. 935 */ 936 if (i == 0) { 937 vprintf(stdout, "End-of-tape encountered\n"); 938 if (!pipein) { 939 newvol = volno + 1; 940 volno = 0; 941 numtrec = 0; 942 getvol(newvol); 943 readtape(buf); 944 return; 945 } 946 if (rd % TP_BSIZE != 0) 947 panic("partial block read: %d should be %d\n", 948 rd, ntrec * TP_BSIZE); 949 terminateinput(); 950 memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE); 951 } 952 blkcnt = 0; 953 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE); 954 blksread++; 955 tapeaddr++; 956 } 957 958 static void 959 findtapeblksize(void) 960 { 961 long i; 962 963 for (i = 0; i < ntrec; i++) 964 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; 965 blkcnt = 0; 966 #ifdef RRESTORE 967 if (host) 968 i = rmtread(tapebuf, ntrec * TP_BSIZE); 969 else 970 #endif 971 i = read(mt, tapebuf, ntrec * TP_BSIZE); 972 973 if (i <= 0) { 974 fprintf(stderr, "tape read error: %s\n", strerror(errno)); 975 done(1); 976 } 977 if (i % TP_BSIZE != 0) { 978 fprintf(stderr, "Tape block size (%ld) %s (%d)\n", 979 i, "is not a multiple of dump block size", TP_BSIZE); 980 done(1); 981 } 982 ntrec = i / TP_BSIZE; 983 numtrec = ntrec; 984 vprintf(stdout, "Tape block size is %ld\n", ntrec); 985 } 986 987 void 988 closemt(void) 989 { 990 991 if (mt < 0) 992 return; 993 #ifdef RRESTORE 994 if (host) 995 rmtclose(); 996 else 997 #endif 998 (void) close(mt); 999 } 1000 1001 /* 1002 * Read the next block from the tape. 1003 * Check to see if it is one of several vintage headers. 1004 * If it is an old style header, convert it to a new style header. 1005 * If it is not any valid header, return an error. 1006 */ 1007 static int 1008 gethead(struct s_spcl *buf) 1009 { 1010 long i; 1011 union { 1012 quad_t qval; 1013 int32_t val[2]; 1014 } qcvt; 1015 union u_ospcl { 1016 char dummy[TP_BSIZE]; 1017 struct s_ospcl { 1018 int32_t c_type; 1019 int32_t c_date; 1020 int32_t c_ddate; 1021 int32_t c_volume; 1022 int32_t c_tapea; 1023 u_short c_inumber; 1024 int32_t c_magic; 1025 int32_t c_checksum; 1026 struct odinode { 1027 unsigned short odi_mode; 1028 u_short odi_nlink; 1029 u_short odi_uid; 1030 u_short odi_gid; 1031 int32_t odi_size; 1032 int32_t odi_rdev; 1033 char odi_addr[36]; 1034 int32_t odi_atime; 1035 int32_t odi_mtime; 1036 int32_t odi_ctime; 1037 } c_dinode; 1038 int32_t c_count; 1039 char c_addr[256]; 1040 } s_ospcl; 1041 } u_ospcl; 1042 1043 if (!cvtflag) { 1044 readtape((char *)buf); 1045 if (buf->c_magic != NFS_MAGIC) { 1046 if (swabl(buf->c_magic) != NFS_MAGIC) 1047 return (FAIL); 1048 if (!Bcvt) { 1049 vprintf(stdout, "Note: Doing Byte swapping\n"); 1050 Bcvt = 1; 1051 } 1052 } 1053 if (checksum((int *)buf) == FAIL) 1054 return (FAIL); 1055 if (Bcvt) { 1056 swabst((u_char *)"8l4s31l", (u_char *)buf); 1057 swabst((u_char *)"l",(u_char *) &buf->c_level); 1058 swabst((u_char *)"2l",(u_char *) &buf->c_flags); 1059 } 1060 goto good; 1061 } 1062 readtape((char *)(&u_ospcl.s_ospcl)); 1063 memset(buf, 0, (long)TP_BSIZE); 1064 buf->c_type = u_ospcl.s_ospcl.c_type; 1065 buf->c_date = u_ospcl.s_ospcl.c_date; 1066 buf->c_ddate = u_ospcl.s_ospcl.c_ddate; 1067 buf->c_volume = u_ospcl.s_ospcl.c_volume; 1068 buf->c_tapea = u_ospcl.s_ospcl.c_tapea; 1069 buf->c_inumber = u_ospcl.s_ospcl.c_inumber; 1070 buf->c_checksum = u_ospcl.s_ospcl.c_checksum; 1071 buf->c_magic = u_ospcl.s_ospcl.c_magic; 1072 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode; 1073 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink; 1074 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid; 1075 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid; 1076 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size; 1077 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev; 1078 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime; 1079 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime; 1080 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime; 1081 buf->c_count = u_ospcl.s_ospcl.c_count; 1082 memmove(buf->c_addr, u_ospcl.s_ospcl.c_addr, (long)256); 1083 if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC || 1084 checksum((int *)(&u_ospcl.s_ospcl)) == FAIL) 1085 return(FAIL); 1086 buf->c_magic = NFS_MAGIC; 1087 1088 good: 1089 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) && 1090 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) { 1091 qcvt.qval = buf->c_dinode.di_size; 1092 if (qcvt.val[0] || qcvt.val[1]) { 1093 printf("Note: Doing Quad swapping\n"); 1094 Qcvt = 1; 1095 } 1096 } 1097 if (Qcvt) { 1098 qcvt.qval = buf->c_dinode.di_size; 1099 i = qcvt.val[1]; 1100 qcvt.val[1] = qcvt.val[0]; 1101 qcvt.val[0] = i; 1102 buf->c_dinode.di_size = qcvt.qval; 1103 } 1104 readmapflag = 0; 1105 1106 switch (buf->c_type) { 1107 1108 case TS_CLRI: 1109 case TS_BITS: 1110 /* 1111 * Have to patch up missing information in bit map headers 1112 */ 1113 buf->c_inumber = 0; 1114 buf->c_dinode.di_size = buf->c_count * TP_BSIZE; 1115 if (buf->c_count > TP_NINDIR) 1116 readmapflag = 1; 1117 else 1118 for (i = 0; i < buf->c_count; i++) 1119 buf->c_addr[i]++; 1120 break; 1121 1122 case TS_TAPE: 1123 if ((buf->c_flags & DR_NEWINODEFMT) == 0) 1124 oldinofmt = 1; 1125 /* fall through */ 1126 case TS_END: 1127 buf->c_inumber = 0; 1128 break; 1129 1130 case TS_INODE: 1131 case TS_ADDR: 1132 break; 1133 1134 default: 1135 panic("gethead: unknown inode type %d\n", buf->c_type); 1136 break; 1137 } 1138 /* 1139 * If we are restoring a filesystem with old format inodes, 1140 * copy the uid/gid to the new location. 1141 */ 1142 if (oldinofmt) { 1143 buf->c_dinode.di_uid = buf->c_dinode.di_ouid; 1144 buf->c_dinode.di_gid = buf->c_dinode.di_ogid; 1145 } 1146 tapeaddr = buf->c_tapea; 1147 if (dflag) 1148 accthdr(buf); 1149 return(GOOD); 1150 } 1151 1152 /* 1153 * Check that a header is where it belongs and predict the next header 1154 */ 1155 static void 1156 accthdr(struct s_spcl *header) 1157 { 1158 static ino_t previno = 0x7fffffff; 1159 static int prevtype; 1160 static long predict; 1161 long blks, i; 1162 1163 if (header->c_type == TS_TAPE) { 1164 fprintf(stderr, "Volume header (%s inode format) ", 1165 oldinofmt ? "old" : "new"); 1166 if (header->c_firstrec) 1167 fprintf(stderr, "begins with record %ld", 1168 header->c_firstrec); 1169 fprintf(stderr, "\n"); 1170 previno = 0x7fffffff; 1171 return; 1172 } 1173 if (previno == 0x7fffffff) 1174 goto newcalc; 1175 switch (prevtype) { 1176 case TS_BITS: 1177 fprintf(stderr, "Dumped inodes map header"); 1178 break; 1179 case TS_CLRI: 1180 fprintf(stderr, "Used inodes map header"); 1181 break; 1182 case TS_INODE: 1183 fprintf(stderr, "File header, ino %d", previno); 1184 break; 1185 case TS_ADDR: 1186 fprintf(stderr, "File continuation header, ino %d", previno); 1187 break; 1188 case TS_END: 1189 fprintf(stderr, "End of tape header"); 1190 break; 1191 } 1192 if (predict != blksread - 1) 1193 fprintf(stderr, "; predicted %ld blocks, got %ld blocks", 1194 predict, blksread - 1); 1195 fprintf(stderr, "\n"); 1196 newcalc: 1197 blks = 0; 1198 if (header->c_type != TS_END) 1199 for (i = 0; i < header->c_count; i++) 1200 if (readmapflag || header->c_addr[i] != 0) 1201 blks++; 1202 predict = blks; 1203 blksread = 0; 1204 prevtype = header->c_type; 1205 previno = header->c_inumber; 1206 } 1207 1208 /* 1209 * Find an inode header. 1210 * Complain if had to skip. 1211 */ 1212 static void 1213 findinode(struct s_spcl *header) 1214 { 1215 static long skipcnt = 0; 1216 long i; 1217 char buf[TP_BSIZE]; 1218 int htype; 1219 1220 curfile.name = "<name unknown>"; 1221 curfile.action = UNKNOWN; 1222 curfile.dip = NULL; 1223 curfile.ino = 0; 1224 do { 1225 if (header->c_magic != NFS_MAGIC) { 1226 skipcnt++; 1227 while (gethead(header) == FAIL || 1228 _time32_to_time(header->c_date) != dumpdate) 1229 skipcnt++; 1230 } 1231 htype = header->c_type; 1232 switch (htype) { 1233 1234 case TS_ADDR: 1235 /* 1236 * Skip up to the beginning of the next record 1237 */ 1238 for (i = 0; i < header->c_count; i++) 1239 if (header->c_addr[i]) 1240 readtape(buf); 1241 while (gethead(header) == FAIL || 1242 _time32_to_time(header->c_date) != dumpdate) 1243 skipcnt++; 1244 break; 1245 1246 case TS_INODE: 1247 curfile.dip = &header->c_dinode; 1248 curfile.ino = header->c_inumber; 1249 break; 1250 1251 case TS_END: 1252 /* If we missed some tapes, get another volume. */ 1253 if (tapesread & (tapesread + 1)) { 1254 getvol(0); 1255 continue; 1256 } 1257 curfile.ino = maxino; 1258 break; 1259 1260 case TS_CLRI: 1261 curfile.name = "<file removal list>"; 1262 break; 1263 1264 case TS_BITS: 1265 curfile.name = "<file dump list>"; 1266 break; 1267 1268 case TS_TAPE: 1269 panic("unexpected tape header\n"); 1270 /* NOTREACHED */ 1271 1272 default: 1273 panic("unknown tape header type %d\n", spcl.c_type); 1274 /* NOTREACHED */ 1275 1276 } 1277 } while (htype == TS_ADDR); 1278 if (skipcnt > 0) 1279 fprintf(stderr, "resync restore, skipped %ld blocks\n", 1280 skipcnt); 1281 skipcnt = 0; 1282 } 1283 1284 static int 1285 checksum(int *buf) 1286 { 1287 int i, j; 1288 1289 j = sizeof(union u_spcl) / sizeof(int); 1290 i = 0; 1291 if(!Bcvt) { 1292 do 1293 i += *buf++; 1294 while (--j); 1295 } else { 1296 /* What happens if we want to read restore tapes 1297 for a 16bit int machine??? */ 1298 do 1299 i += swabl(*buf++); 1300 while (--j); 1301 } 1302 1303 if (i != CHECKSUM) { 1304 fprintf(stderr, "Checksum error %o, inode %d file %s\n", i, 1305 curfile.ino, curfile.name); 1306 return(FAIL); 1307 } 1308 return(GOOD); 1309 } 1310 1311 #ifdef RRESTORE 1312 #include <stdarg.h> 1313 1314 void 1315 msg(const char *fmt, ...) 1316 { 1317 va_list ap; 1318 va_start(ap, fmt); 1319 (void)vfprintf(stderr, fmt, ap); 1320 va_end(ap); 1321 } 1322 #endif /* RRESTORE */ 1323 1324 static u_char * 1325 swabshort(u_char *sp, int n) 1326 { 1327 char c; 1328 1329 while (--n >= 0) { 1330 c = sp[0]; sp[0] = sp[1]; sp[1] = c; 1331 sp += 2; 1332 } 1333 return (sp); 1334 } 1335 1336 static u_char * 1337 swablong(u_char *sp, int n) 1338 { 1339 char c; 1340 1341 while (--n >= 0) { 1342 c = sp[0]; sp[0] = sp[3]; sp[3] = c; 1343 c = sp[2]; sp[2] = sp[1]; sp[1] = c; 1344 sp += 4; 1345 } 1346 return (sp); 1347 } 1348 1349 void 1350 swabst(u_char *cp, u_char *sp) 1351 { 1352 int n = 0; 1353 1354 while (*cp) { 1355 switch (*cp) { 1356 case '0': case '1': case '2': case '3': case '4': 1357 case '5': case '6': case '7': case '8': case '9': 1358 n = (n * 10) + (*cp++ - '0'); 1359 continue; 1360 1361 case 's': case 'w': case 'h': 1362 if (n == 0) 1363 n = 1; 1364 sp = swabshort(sp, n); 1365 break; 1366 1367 case 'l': 1368 if (n == 0) 1369 n = 1; 1370 sp = swablong(sp, n); 1371 break; 1372 1373 default: /* Any other character, like 'b' counts as byte. */ 1374 if (n == 0) 1375 n = 1; 1376 sp += n; 1377 break; 1378 } 1379 cp++; 1380 n = 0; 1381 } 1382 } 1383 1384 static u_long 1385 swabl(u_long x) 1386 { 1387 swabst((u_char *)"l", (u_char *)&x); 1388 return (x); 1389 } 1390