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 file system 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 mode_t mode; 533 struct timeval timep[2]; 534 struct entry *ep; 535 536 curfile.name = name; 537 curfile.action = USING; 538 timep[0].tv_sec = curfile.dip->di_atime; 539 timep[0].tv_usec = curfile.dip->di_atimensec / 1000; 540 timep[1].tv_sec = curfile.dip->di_mtime; 541 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000; 542 mode = curfile.dip->di_mode; 543 flags = curfile.dip->di_flags; 544 switch (mode & IFMT) { 545 546 default: 547 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode); 548 skipfile(); 549 return (FAIL); 550 551 case IFSOCK: 552 vprintf(stdout, "skipped socket %s\n", name); 553 skipfile(); 554 return (GOOD); 555 556 case IFDIR: 557 if (mflag) { 558 ep = lookupname(name); 559 if (ep == NULL || ep->e_flags & EXTRACT) 560 panic("unextracted directory %s\n", name); 561 skipfile(); 562 return (GOOD); 563 } 564 vprintf(stdout, "extract file %s\n", name); 565 return (genliteraldir(name, curfile.ino)); 566 567 case IFLNK: 568 lnkbuf[0] = '\0'; 569 pathlen = 0; 570 getfile(xtrlnkfile, xtrlnkskip); 571 if (pathlen == 0) { 572 vprintf(stdout, 573 "%s: zero length symbolic link (ignored)\n", name); 574 return (GOOD); 575 } 576 return (linkit(lnkbuf, name, SYMLINK)); 577 578 case IFIFO: 579 vprintf(stdout, "extract fifo %s\n", name); 580 if (Nflag) { 581 skipfile(); 582 return (GOOD); 583 } 584 if (uflag && !Nflag) 585 (void)unlink(name); 586 if (mkfifo(name, mode) < 0) { 587 fprintf(stderr, "%s: cannot create fifo: %s\n", 588 name, strerror(errno)); 589 skipfile(); 590 return (FAIL); 591 } 592 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid); 593 (void) chmod(name, mode); 594 utimes(name, timep); 595 (void) chflags(name, flags); 596 skipfile(); 597 return (GOOD); 598 599 case IFCHR: 600 case IFBLK: 601 vprintf(stdout, "extract special file %s\n", name); 602 if (Nflag) { 603 skipfile(); 604 return (GOOD); 605 } 606 if (uflag) 607 (void)unlink(name); 608 if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) { 609 fprintf(stderr, "%s: cannot create special file: %s\n", 610 name, strerror(errno)); 611 skipfile(); 612 return (FAIL); 613 } 614 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid); 615 (void) chmod(name, mode); 616 utimes(name, timep); 617 (void) chflags(name, flags); 618 skipfile(); 619 return (GOOD); 620 621 case IFREG: 622 vprintf(stdout, "extract file %s\n", name); 623 if (Nflag) { 624 skipfile(); 625 return (GOOD); 626 } 627 if (uflag) 628 (void)unlink(name); 629 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 630 0666)) < 0) { 631 fprintf(stderr, "%s: cannot create file: %s\n", 632 name, strerror(errno)); 633 skipfile(); 634 return (FAIL); 635 } 636 (void) fchown(ofile, curfile.dip->di_uid, curfile.dip->di_gid); 637 (void) fchmod(ofile, mode); 638 getfile(xtrfile, xtrskip); 639 (void) close(ofile); 640 utimes(name, timep); 641 (void) chflags(name, flags); 642 return (GOOD); 643 } 644 /* NOTREACHED */ 645 } 646 647 /* 648 * skip over bit maps on the tape 649 */ 650 void 651 skipmaps(void) 652 { 653 654 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI) 655 skipfile(); 656 } 657 658 /* 659 * skip over a file on the tape 660 */ 661 void 662 skipfile(void) 663 { 664 665 curfile.action = SKIP; 666 getfile(xtrnull, xtrnull); 667 } 668 669 /* 670 * Extract a file from the tape. 671 * When an allocated block is found it is passed to the fill function; 672 * when an unallocated block (hole) is found, a zeroed buffer is passed 673 * to the skip function. 674 */ 675 void 676 getfile(void (*fill)(char *, long), void (*skip)(char *, long)) 677 { 678 int i; 679 int curblk = 0; 680 quad_t size = spcl.c_dinode.di_size; 681 static char clearedbuf[MAXBSIZE]; 682 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE]; 683 char junk[TP_BSIZE]; 684 685 if (spcl.c_type == TS_END) 686 panic("ran off end of tape\n"); 687 if (spcl.c_magic != NFS_MAGIC) 688 panic("not at beginning of a file\n"); 689 if (!gettingfile && setjmp(restart) != 0) 690 return; 691 gettingfile++; 692 loop: 693 for (i = 0; i < spcl.c_count; i++) { 694 if (readmapflag || spcl.c_addr[i]) { 695 readtape(&buf[curblk++][0]); 696 if (curblk == fssize / TP_BSIZE) { 697 (*fill)((char *)buf, (long)(size > TP_BSIZE ? 698 fssize : (curblk - 1) * TP_BSIZE + size)); 699 curblk = 0; 700 } 701 } else { 702 if (curblk > 0) { 703 (*fill)((char *)buf, (long)(size > TP_BSIZE ? 704 curblk * TP_BSIZE : 705 (curblk - 1) * TP_BSIZE + size)); 706 curblk = 0; 707 } 708 (*skip)(clearedbuf, (long)(size > TP_BSIZE ? 709 TP_BSIZE : size)); 710 } 711 if ((size -= TP_BSIZE) <= 0) { 712 for (i++; i < spcl.c_count; i++) 713 if (readmapflag || spcl.c_addr[i]) 714 readtape(junk); 715 break; 716 } 717 } 718 if (gethead(&spcl) == GOOD && size > 0) { 719 if (spcl.c_type == TS_ADDR) 720 goto loop; 721 dprintf(stdout, 722 "Missing address (header) block for %s at %ld blocks\n", 723 curfile.name, blksread); 724 } 725 if (curblk > 0) 726 (*fill)((char *)buf, (long)((curblk * TP_BSIZE) + size)); 727 findinode(&spcl); 728 gettingfile = 0; 729 } 730 731 /* 732 * Write out the next block of a file. 733 */ 734 static void 735 xtrfile(char *buf, long size) 736 { 737 738 if (Nflag) 739 return; 740 if (write(ofile, buf, (int) size) == -1) { 741 fprintf(stderr, 742 "write error extracting inode %d, name %s\nwrite: %s\n", 743 curfile.ino, curfile.name, strerror(errno)); 744 } 745 } 746 747 /* 748 * Skip over a hole in a file. 749 */ 750 /* ARGSUSED */ 751 static void 752 xtrskip(char *buf, long size) 753 { 754 755 if (lseek(ofile, size, SEEK_CUR) == -1) { 756 fprintf(stderr, 757 "seek error extracting inode %d, name %s\nlseek: %s\n", 758 curfile.ino, curfile.name, strerror(errno)); 759 done(1); 760 } 761 } 762 763 /* 764 * Collect the next block of a symbolic link. 765 */ 766 static void 767 xtrlnkfile(char *buf, long size) 768 { 769 770 pathlen += size; 771 if (pathlen > MAXPATHLEN) { 772 fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n", 773 curfile.name, lnkbuf, buf, pathlen); 774 done(1); 775 } 776 (void) strcat(lnkbuf, buf); 777 } 778 779 /* 780 * Skip over a hole in a symbolic link (should never happen). 781 */ 782 /* ARGSUSED */ 783 static void 784 xtrlnkskip(char *buf, long size) 785 { 786 787 fprintf(stderr, "unallocated block in symbolic link %s\n", 788 curfile.name); 789 done(1); 790 } 791 792 /* 793 * Collect the next block of a bit map. 794 */ 795 static void 796 xtrmap(char *buf, long size) 797 { 798 799 memmove(map, buf, size); 800 map += size; 801 } 802 803 /* 804 * Skip over a hole in a bit map (should never happen). 805 */ 806 /* ARGSUSED */ 807 static void 808 xtrmapskip(char *buf, long size) 809 { 810 811 panic("hole in map\n"); 812 map += size; 813 } 814 815 /* 816 * Noop, when an extraction function is not needed. 817 */ 818 /* ARGSUSED */ 819 void 820 xtrnull(char *buf, long size) 821 { 822 823 return; 824 } 825 826 /* 827 * Read TP_BSIZE blocks from the input. 828 * Handle read errors, and end of media. 829 */ 830 static void 831 readtape(char *buf) 832 { 833 long rd, newvol, i; 834 int cnt, seek_failed; 835 836 if (blkcnt < numtrec) { 837 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE); 838 blksread++; 839 tapeaddr++; 840 return; 841 } 842 for (i = 0; i < ntrec; i++) 843 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; 844 if (numtrec == 0) 845 numtrec = ntrec; 846 cnt = ntrec * TP_BSIZE; 847 rd = 0; 848 getmore: 849 #ifdef RRESTORE 850 if (host) 851 i = rmtread(&tapebuf[rd], cnt); 852 else 853 #endif 854 i = read(mt, &tapebuf[rd], cnt); 855 /* 856 * Check for mid-tape short read error. 857 * If found, skip rest of buffer and start with the next. 858 */ 859 if (!pipein && numtrec < ntrec && i > 0) { 860 dprintf(stdout, "mid-media short read error.\n"); 861 numtrec = ntrec; 862 } 863 /* 864 * Handle partial block read. 865 */ 866 if (pipein && i == 0 && rd > 0) 867 i = rd; 868 else if (i > 0 && i != ntrec * TP_BSIZE) { 869 if (pipein) { 870 rd += i; 871 cnt -= i; 872 if (cnt > 0) 873 goto getmore; 874 i = rd; 875 } else { 876 /* 877 * Short read. Process the blocks read. 878 */ 879 if (i % TP_BSIZE != 0) 880 vprintf(stdout, 881 "partial block read: %ld should be %ld\n", 882 i, ntrec * TP_BSIZE); 883 numtrec = i / TP_BSIZE; 884 } 885 } 886 /* 887 * Handle read error. 888 */ 889 if (i < 0) { 890 fprintf(stderr, "Tape read error while "); 891 switch (curfile.action) { 892 default: 893 fprintf(stderr, "trying to set up tape\n"); 894 break; 895 case UNKNOWN: 896 fprintf(stderr, "trying to resynchronize\n"); 897 break; 898 case USING: 899 fprintf(stderr, "restoring %s\n", curfile.name); 900 break; 901 case SKIP: 902 fprintf(stderr, "skipping over inode %d\n", 903 curfile.ino); 904 break; 905 } 906 if (!yflag && !reply("continue")) 907 done(1); 908 i = ntrec * TP_BSIZE; 909 memset(tapebuf, 0, i); 910 #ifdef RRESTORE 911 if (host) 912 seek_failed = (rmtseek(i, 1) < 0); 913 else 914 #endif 915 seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1); 916 917 if (seek_failed) { 918 fprintf(stderr, 919 "continuation failed: %s\n", strerror(errno)); 920 done(1); 921 } 922 } 923 /* 924 * Handle end of tape. 925 */ 926 if (i == 0) { 927 vprintf(stdout, "End-of-tape encountered\n"); 928 if (!pipein) { 929 newvol = volno + 1; 930 volno = 0; 931 numtrec = 0; 932 getvol(newvol); 933 readtape(buf); 934 return; 935 } 936 if (rd % TP_BSIZE != 0) 937 panic("partial block read: %d should be %d\n", 938 rd, ntrec * TP_BSIZE); 939 terminateinput(); 940 memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE); 941 } 942 blkcnt = 0; 943 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE); 944 blksread++; 945 tapeaddr++; 946 } 947 948 static void 949 findtapeblksize(void) 950 { 951 long i; 952 953 for (i = 0; i < ntrec; i++) 954 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; 955 blkcnt = 0; 956 #ifdef RRESTORE 957 if (host) 958 i = rmtread(tapebuf, ntrec * TP_BSIZE); 959 else 960 #endif 961 i = read(mt, tapebuf, ntrec * TP_BSIZE); 962 963 if (i <= 0) { 964 fprintf(stderr, "tape read error: %s\n", strerror(errno)); 965 done(1); 966 } 967 if (i % TP_BSIZE != 0) { 968 fprintf(stderr, "Tape block size (%ld) %s (%d)\n", 969 i, "is not a multiple of dump block size", TP_BSIZE); 970 done(1); 971 } 972 ntrec = i / TP_BSIZE; 973 numtrec = ntrec; 974 vprintf(stdout, "Tape block size is %ld\n", ntrec); 975 } 976 977 void 978 closemt(void) 979 { 980 981 if (mt < 0) 982 return; 983 #ifdef RRESTORE 984 if (host) 985 rmtclose(); 986 else 987 #endif 988 (void) close(mt); 989 } 990 991 /* 992 * Read the next block from the tape. 993 * Check to see if it is one of several vintage headers. 994 * If it is an old style header, convert it to a new style header. 995 * If it is not any valid header, return an error. 996 */ 997 static int 998 gethead(struct s_spcl *buf) 999 { 1000 long i; 1001 union { 1002 quad_t qval; 1003 int32_t val[2]; 1004 } qcvt; 1005 union u_ospcl { 1006 char dummy[TP_BSIZE]; 1007 struct s_ospcl { 1008 int32_t c_type; 1009 int32_t c_date; 1010 int32_t c_ddate; 1011 int32_t c_volume; 1012 int32_t c_tapea; 1013 u_short c_inumber; 1014 int32_t c_magic; 1015 int32_t c_checksum; 1016 struct odinode { 1017 unsigned short odi_mode; 1018 u_short odi_nlink; 1019 u_short odi_uid; 1020 u_short odi_gid; 1021 int32_t odi_size; 1022 int32_t odi_rdev; 1023 char odi_addr[36]; 1024 int32_t odi_atime; 1025 int32_t odi_mtime; 1026 int32_t odi_ctime; 1027 } c_dinode; 1028 int32_t c_count; 1029 char c_addr[256]; 1030 } s_ospcl; 1031 } u_ospcl; 1032 1033 if (!cvtflag) { 1034 readtape((char *)buf); 1035 if (buf->c_magic != NFS_MAGIC) { 1036 if (swabl(buf->c_magic) != NFS_MAGIC) 1037 return (FAIL); 1038 if (!Bcvt) { 1039 vprintf(stdout, "Note: Doing Byte swapping\n"); 1040 Bcvt = 1; 1041 } 1042 } 1043 if (checksum((int *)buf) == FAIL) 1044 return (FAIL); 1045 if (Bcvt) { 1046 swabst((u_char *)"8l4s31l", (u_char *)buf); 1047 swabst((u_char *)"l",(u_char *) &buf->c_level); 1048 swabst((u_char *)"2l",(u_char *) &buf->c_flags); 1049 } 1050 goto good; 1051 } 1052 readtape((char *)(&u_ospcl.s_ospcl)); 1053 memset(buf, 0, (long)TP_BSIZE); 1054 buf->c_type = u_ospcl.s_ospcl.c_type; 1055 buf->c_date = u_ospcl.s_ospcl.c_date; 1056 buf->c_ddate = u_ospcl.s_ospcl.c_ddate; 1057 buf->c_volume = u_ospcl.s_ospcl.c_volume; 1058 buf->c_tapea = u_ospcl.s_ospcl.c_tapea; 1059 buf->c_inumber = u_ospcl.s_ospcl.c_inumber; 1060 buf->c_checksum = u_ospcl.s_ospcl.c_checksum; 1061 buf->c_magic = u_ospcl.s_ospcl.c_magic; 1062 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode; 1063 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink; 1064 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid; 1065 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid; 1066 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size; 1067 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev; 1068 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime; 1069 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime; 1070 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime; 1071 buf->c_count = u_ospcl.s_ospcl.c_count; 1072 memmove(buf->c_addr, u_ospcl.s_ospcl.c_addr, (long)256); 1073 if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC || 1074 checksum((int *)(&u_ospcl.s_ospcl)) == FAIL) 1075 return(FAIL); 1076 buf->c_magic = NFS_MAGIC; 1077 1078 good: 1079 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) && 1080 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) { 1081 qcvt.qval = buf->c_dinode.di_size; 1082 if (qcvt.val[0] || qcvt.val[1]) { 1083 printf("Note: Doing Quad swapping\n"); 1084 Qcvt = 1; 1085 } 1086 } 1087 if (Qcvt) { 1088 qcvt.qval = buf->c_dinode.di_size; 1089 i = qcvt.val[1]; 1090 qcvt.val[1] = qcvt.val[0]; 1091 qcvt.val[0] = i; 1092 buf->c_dinode.di_size = qcvt.qval; 1093 } 1094 readmapflag = 0; 1095 1096 switch (buf->c_type) { 1097 1098 case TS_CLRI: 1099 case TS_BITS: 1100 /* 1101 * Have to patch up missing information in bit map headers 1102 */ 1103 buf->c_inumber = 0; 1104 buf->c_dinode.di_size = buf->c_count * TP_BSIZE; 1105 if (buf->c_count > TP_NINDIR) 1106 readmapflag = 1; 1107 else 1108 for (i = 0; i < buf->c_count; i++) 1109 buf->c_addr[i]++; 1110 break; 1111 1112 case TS_TAPE: 1113 if ((buf->c_flags & DR_NEWINODEFMT) == 0) 1114 oldinofmt = 1; 1115 /* fall through */ 1116 case TS_END: 1117 buf->c_inumber = 0; 1118 break; 1119 1120 case TS_INODE: 1121 case TS_ADDR: 1122 break; 1123 1124 default: 1125 panic("gethead: unknown inode type %d\n", buf->c_type); 1126 break; 1127 } 1128 /* 1129 * If we are restoring a filesystem with old format inodes, 1130 * copy the uid/gid to the new location. 1131 */ 1132 if (oldinofmt) { 1133 buf->c_dinode.di_uid = buf->c_dinode.di_ouid; 1134 buf->c_dinode.di_gid = buf->c_dinode.di_ogid; 1135 } 1136 tapeaddr = buf->c_tapea; 1137 if (dflag) 1138 accthdr(buf); 1139 return(GOOD); 1140 } 1141 1142 /* 1143 * Check that a header is where it belongs and predict the next header 1144 */ 1145 static void 1146 accthdr(struct s_spcl *header) 1147 { 1148 static ino_t previno = 0x7fffffff; 1149 static int prevtype; 1150 static long predict; 1151 long blks, i; 1152 1153 if (header->c_type == TS_TAPE) { 1154 fprintf(stderr, "Volume header (%s inode format) ", 1155 oldinofmt ? "old" : "new"); 1156 if (header->c_firstrec) 1157 fprintf(stderr, "begins with record %ld", 1158 header->c_firstrec); 1159 fprintf(stderr, "\n"); 1160 previno = 0x7fffffff; 1161 return; 1162 } 1163 if (previno == 0x7fffffff) 1164 goto newcalc; 1165 switch (prevtype) { 1166 case TS_BITS: 1167 fprintf(stderr, "Dumped inodes map header"); 1168 break; 1169 case TS_CLRI: 1170 fprintf(stderr, "Used inodes map header"); 1171 break; 1172 case TS_INODE: 1173 fprintf(stderr, "File header, ino %d", previno); 1174 break; 1175 case TS_ADDR: 1176 fprintf(stderr, "File continuation header, ino %d", previno); 1177 break; 1178 case TS_END: 1179 fprintf(stderr, "End of tape header"); 1180 break; 1181 } 1182 if (predict != blksread - 1) 1183 fprintf(stderr, "; predicted %ld blocks, got %ld blocks", 1184 predict, blksread - 1); 1185 fprintf(stderr, "\n"); 1186 newcalc: 1187 blks = 0; 1188 if (header->c_type != TS_END) 1189 for (i = 0; i < header->c_count; i++) 1190 if (readmapflag || header->c_addr[i] != 0) 1191 blks++; 1192 predict = blks; 1193 blksread = 0; 1194 prevtype = header->c_type; 1195 previno = header->c_inumber; 1196 } 1197 1198 /* 1199 * Find an inode header. 1200 * Complain if had to skip. 1201 */ 1202 static void 1203 findinode(struct s_spcl *header) 1204 { 1205 static long skipcnt = 0; 1206 long i; 1207 char buf[TP_BSIZE]; 1208 int htype; 1209 1210 curfile.name = "<name unknown>"; 1211 curfile.action = UNKNOWN; 1212 curfile.dip = NULL; 1213 curfile.ino = 0; 1214 do { 1215 if (header->c_magic != NFS_MAGIC) { 1216 skipcnt++; 1217 while (gethead(header) == FAIL || 1218 _time32_to_time(header->c_date) != dumpdate) 1219 skipcnt++; 1220 } 1221 htype = header->c_type; 1222 switch (htype) { 1223 1224 case TS_ADDR: 1225 /* 1226 * Skip up to the beginning of the next record 1227 */ 1228 for (i = 0; i < header->c_count; i++) 1229 if (header->c_addr[i]) 1230 readtape(buf); 1231 while (gethead(header) == FAIL || 1232 _time32_to_time(header->c_date) != dumpdate) 1233 skipcnt++; 1234 break; 1235 1236 case TS_INODE: 1237 curfile.dip = &header->c_dinode; 1238 curfile.ino = header->c_inumber; 1239 break; 1240 1241 case TS_END: 1242 /* If we missed some tapes, get another volume. */ 1243 if (tapesread & (tapesread + 1)) { 1244 getvol(0); 1245 continue; 1246 } 1247 curfile.ino = maxino; 1248 break; 1249 1250 case TS_CLRI: 1251 curfile.name = "<file removal list>"; 1252 break; 1253 1254 case TS_BITS: 1255 curfile.name = "<file dump list>"; 1256 break; 1257 1258 case TS_TAPE: 1259 panic("unexpected tape header\n"); 1260 /* NOTREACHED */ 1261 1262 default: 1263 panic("unknown tape header type %d\n", spcl.c_type); 1264 /* NOTREACHED */ 1265 1266 } 1267 } while (htype == TS_ADDR); 1268 if (skipcnt > 0) 1269 fprintf(stderr, "resync restore, skipped %ld blocks\n", 1270 skipcnt); 1271 skipcnt = 0; 1272 } 1273 1274 static int 1275 checksum(int *buf) 1276 { 1277 int i, j; 1278 1279 j = sizeof(union u_spcl) / sizeof(int); 1280 i = 0; 1281 if(!Bcvt) { 1282 do 1283 i += *buf++; 1284 while (--j); 1285 } else { 1286 /* What happens if we want to read restore tapes 1287 for a 16bit int machine??? */ 1288 do 1289 i += swabl(*buf++); 1290 while (--j); 1291 } 1292 1293 if (i != CHECKSUM) { 1294 fprintf(stderr, "Checksum error %o, inode %d file %s\n", i, 1295 curfile.ino, curfile.name); 1296 return(FAIL); 1297 } 1298 return(GOOD); 1299 } 1300 1301 #ifdef RRESTORE 1302 #include <stdarg.h> 1303 1304 void 1305 msg(const char *fmt, ...) 1306 { 1307 va_list ap; 1308 va_start(ap, fmt); 1309 (void)vfprintf(stderr, fmt, ap); 1310 va_end(ap); 1311 } 1312 #endif /* RRESTORE */ 1313 1314 static u_char * 1315 swabshort(u_char *sp, int n) 1316 { 1317 char c; 1318 1319 while (--n >= 0) { 1320 c = sp[0]; sp[0] = sp[1]; sp[1] = c; 1321 sp += 2; 1322 } 1323 return (sp); 1324 } 1325 1326 static u_char * 1327 swablong(u_char *sp, int n) 1328 { 1329 char c; 1330 1331 while (--n >= 0) { 1332 c = sp[0]; sp[0] = sp[3]; sp[3] = c; 1333 c = sp[2]; sp[2] = sp[1]; sp[1] = c; 1334 sp += 4; 1335 } 1336 return (sp); 1337 } 1338 1339 void 1340 swabst(u_char *cp, u_char *sp) 1341 { 1342 int n = 0; 1343 1344 while (*cp) { 1345 switch (*cp) { 1346 case '0': case '1': case '2': case '3': case '4': 1347 case '5': case '6': case '7': case '8': case '9': 1348 n = (n * 10) + (*cp++ - '0'); 1349 continue; 1350 1351 case 's': case 'w': case 'h': 1352 if (n == 0) 1353 n = 1; 1354 sp = swabshort(sp, n); 1355 break; 1356 1357 case 'l': 1358 if (n == 0) 1359 n = 1; 1360 sp = swablong(sp, n); 1361 break; 1362 1363 default: /* Any other character, like 'b' counts as byte. */ 1364 if (n == 0) 1365 n = 1; 1366 sp += n; 1367 break; 1368 } 1369 cp++; 1370 n = 0; 1371 } 1372 } 1373 1374 static u_long 1375 swabl(u_long x) 1376 { 1377 swabst((u_char *)"l", (u_char *)&x); 1378 return (x); 1379 } 1380