1 /* $NetBSD: tape.c,v 1.46 2002/05/25 23:45:14 wiz Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #include <sys/cdefs.h> 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)tape.c 8.9 (Berkeley) 5/1/95"; 45 #else 46 __RCSID("$NetBSD: tape.c,v 1.46 2002/05/25 23:45:14 wiz Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/param.h> 51 #include <sys/file.h> 52 #include <sys/ioctl.h> 53 #include <sys/mtio.h> 54 #include <sys/stat.h> 55 56 #include <ufs/ufs/dinode.h> 57 #include <protocols/dumprestore.h> 58 59 #include <errno.h> 60 #include <paths.h> 61 #include <setjmp.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <time.h> 66 #include <unistd.h> 67 68 #include "restore.h" 69 #include "extern.h" 70 71 static u_int32_t fssize = MAXBSIZE; 72 static int mt = -1; 73 static int pipein = 0; 74 static char magtape[BUFSIZ]; 75 static int blkcnt; 76 static int numtrec; 77 static char *tapebuf; 78 static union u_spcl endoftapemark; 79 static int blksread; /* blocks read since last header */ 80 static int tpblksread = 0; /* TP_BSIZE blocks read */ 81 static int tapesread; 82 static jmp_buf restart; 83 static int gettingfile = 0; /* restart has a valid frame */ 84 static char *host = NULL; 85 86 static int ofile; 87 static char *map; 88 static char lnkbuf[MAXPATHLEN + 1]; 89 static int pathlen; 90 91 int oldinofmt; /* old inode format conversion required */ 92 int Bcvt; /* Swap Bytes (for CCI or sun) */ 93 static int Qcvt; /* Swap quads (for sun) */ 94 95 #define FLUSHTAPEBUF() blkcnt = ntrec + 1 96 97 static void accthdr __P((struct s_spcl *)); 98 static int checksum __P((int *)); 99 static void findinode __P((struct s_spcl *)); 100 static void findtapeblksize __P((void)); 101 static int gethead __P((struct s_spcl *)); 102 static void readtape __P((char *)); 103 static void setdumpnum __P((void)); 104 static u_long swabl __P((u_long)); 105 static u_char *swablong __P((u_char *, int)); 106 static u_char *swabshort __P((u_char *, int)); 107 static void terminateinput __P((void)); 108 static void xtrfile __P((char *, long)); 109 static void xtrlnkfile __P((char *, long)); 110 static void xtrlnkskip __P((char *, long)); 111 static void xtrmap __P((char *, long)); 112 static void xtrmapskip __P((char *, long)); 113 static void xtrskip __P((char *, long)); 114 115 /* 116 * Set up an input source 117 */ 118 void 119 setinput(source) 120 char *source; 121 { 122 FLUSHTAPEBUF(); 123 if (bflag) 124 newtapebuf(ntrec); 125 else 126 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC); 127 terminal = stdin; 128 129 #ifdef RRESTORE 130 if (strchr(source, ':')) { 131 host = source; 132 source = strchr(host, ':'); 133 *source++ = '\0'; 134 if (rmthost(host) == 0) 135 exit(1); 136 } else 137 #endif 138 if (strcmp(source, "-") == 0) { 139 /* 140 * Since input is coming from a pipe we must establish 141 * our own connection to the terminal. 142 */ 143 terminal = fopen(_PATH_TTY, "r"); 144 if (terminal == NULL) { 145 (void)fprintf(stderr, "cannot open %s: %s\n", 146 _PATH_TTY, strerror(errno)); 147 terminal = fopen(_PATH_DEVNULL, "r"); 148 if (terminal == NULL) { 149 (void)fprintf(stderr, "cannot open %s: %s\n", 150 _PATH_DEVNULL, strerror(errno)); 151 exit(1); 152 } 153 } 154 pipein++; 155 } 156 (void) strcpy(magtape, source); 157 } 158 159 void 160 newtapebuf(size) 161 long size; 162 { 163 static int tapebufsize = -1; 164 165 ntrec = size; 166 if (size <= tapebufsize) 167 return; 168 if (tapebuf != NULL) 169 free(tapebuf); 170 tapebuf = malloc(size * TP_BSIZE); 171 if (tapebuf == NULL) { 172 fprintf(stderr, "Cannot allocate space for tape buffer\n"); 173 exit(1); 174 } 175 tapebufsize = size; 176 } 177 178 /* 179 * Verify that the tape drive can be accessed and 180 * that it actually is a dump tape. 181 */ 182 void 183 setup() 184 { 185 int i, j, *ip; 186 struct stat stbuf; 187 188 vprintf(stdout, "Verify tape and initialize maps\n"); 189 #ifdef RRESTORE 190 if (host) 191 mt = rmtopen(magtape, 0); 192 else 193 #endif 194 if (pipein) 195 mt = 0; 196 else 197 mt = open(magtape, O_RDONLY, 0); 198 if (mt < 0) { 199 fprintf(stderr, "%s: %s\n", magtape, strerror(errno)); 200 exit(1); 201 } 202 volno = 1; 203 setdumpnum(); 204 FLUSHTAPEBUF(); 205 if (!pipein && !bflag) 206 findtapeblksize(); 207 if (gethead(&spcl) == FAIL) { 208 blkcnt--; /* push back this block */ 209 blksread--; 210 tpblksread--; 211 cvtflag++; 212 if (gethead(&spcl) == FAIL) { 213 fprintf(stderr, "Tape is not a dump tape\n"); 214 exit(1); 215 } 216 fprintf(stderr, "Converting to new file system format.\n"); 217 } 218 if (pipein) { 219 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC; 220 endoftapemark.s_spcl.c_type = TS_END; 221 ip = (int *)&endoftapemark; 222 j = sizeof(union u_spcl) / sizeof(int); 223 i = 0; 224 do 225 i += *ip++; 226 while (--j); 227 endoftapemark.s_spcl.c_checksum = CHECKSUM - i; 228 } 229 if (vflag || command == 't') 230 printdumpinfo(); 231 dumptime = spcl.c_ddate; 232 dumpdate = spcl.c_date; 233 if (stat(".", &stbuf) < 0) { 234 fprintf(stderr, "cannot stat .: %s\n", strerror(errno)); 235 exit(1); 236 } 237 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE) 238 fssize = stbuf.st_blksize; 239 if (((fssize - 1) & fssize) != 0) { 240 fprintf(stderr, "bad block size %d\n", fssize); 241 exit(1); 242 } 243 if (spcl.c_volume != 1) { 244 fprintf(stderr, "Tape is not volume 1 of the dump\n"); 245 exit(1); 246 } 247 if (gethead(&spcl) == FAIL) { 248 dprintf(stdout, "header read failed at %d blocks\n", blksread); 249 panic("no header after volume mark!\n"); 250 } 251 findinode(&spcl); 252 if (spcl.c_type != TS_CLRI) { 253 fprintf(stderr, "Cannot find file removal list\n"); 254 exit(1); 255 } 256 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1; 257 dprintf(stdout, "maxino = %d\n", maxino); 258 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY)); 259 if (map == NULL) 260 panic("no memory for active inode map\n"); 261 usedinomap = map; 262 curfile.action = USING; 263 getfile(xtrmap, xtrmapskip); 264 if (spcl.c_type != TS_BITS) { 265 fprintf(stderr, "Cannot find file dump list\n"); 266 exit(1); 267 } 268 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY)); 269 if (map == (char *)NULL) 270 panic("no memory for file dump list\n"); 271 dumpmap = map; 272 curfile.action = USING; 273 getfile(xtrmap, xtrmapskip); 274 /* 275 * If there may be whiteout entries on the tape, pretend that the 276 * whiteout inode exists, so that the whiteout entries can be 277 * extracted. 278 */ 279 if (oldinofmt == 0) 280 SETINO(WINO, dumpmap); 281 } 282 283 /* 284 * Prompt user to load a new dump volume. 285 * "Nextvol" is the next suggested volume to use. 286 * This suggested volume is enforced when doing full 287 * or incremental restores, but can be overrridden by 288 * the user when only extracting a subset of the files. 289 */ 290 void 291 getvol(nextvol) 292 int nextvol; 293 { 294 int newvol, savecnt, wantnext, i; 295 union u_spcl tmpspcl; 296 # define tmpbuf tmpspcl.s_spcl 297 char buf[TP_BSIZE]; 298 299 newvol = savecnt = wantnext = 0; 300 if (nextvol == 1) { 301 tapesread = 0; 302 gettingfile = 0; 303 } 304 if (pipein) { 305 if (nextvol != 1) 306 panic("Changing volumes on pipe input?\n"); 307 if (volno == 1) 308 return; 309 goto gethdr; 310 } 311 savecnt = blksread; 312 again: 313 if (pipein) 314 exit(1); /* pipes do not get a second chance */ 315 if (command == 'R' || command == 'r' || curfile.action != SKIP) { 316 newvol = nextvol; 317 wantnext = 1; 318 } else { 319 newvol = 0; 320 wantnext = 0; 321 } 322 while (newvol <= 0) { 323 if (tapesread == 0) { 324 fprintf(stderr, "%s%s%s%s%s", 325 "You have not read any tapes yet.\n", 326 "Unless you know which volume your", 327 " file(s) are on you should start\n", 328 "with the last volume and work", 329 " towards the first.\n"); 330 fprintf(stderr, 331 "(Use 1 for the first volume/tape, etc.)\n"); 332 } else { 333 fprintf(stderr, "You have read volumes"); 334 strcpy(buf, ": "); 335 for (i = 1; i < 32; i++) 336 if (tapesread & (1 << i)) { 337 fprintf(stderr, "%s%d", buf, i); 338 strcpy(buf, ", "); 339 } 340 fprintf(stderr, "\n"); 341 } 342 do { 343 fprintf(stderr, "Specify next volume #: "); 344 (void) fflush(stderr); 345 (void) fgets(buf, BUFSIZ, terminal); 346 } while (!feof(terminal) && buf[0] == '\n'); 347 if (feof(terminal)) 348 exit(1); 349 newvol = atoi(buf); 350 if (newvol <= 0) { 351 fprintf(stderr, 352 "Volume numbers are positive numerics\n"); 353 } 354 } 355 if (newvol == volno) { 356 tapesread |= 1 << volno; 357 return; 358 } 359 closemt(); 360 fprintf(stderr, "Mount tape volume %d\n", newvol); 361 fprintf(stderr, "Enter ``none'' if there are no more tapes\n"); 362 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape); 363 (void) fflush(stderr); 364 (void) fgets(buf, BUFSIZ, terminal); 365 if (feof(terminal)) 366 exit(1); 367 if (!strcmp(buf, "none\n")) { 368 terminateinput(); 369 return; 370 } 371 if (buf[0] != '\n') { 372 (void) strcpy(magtape, buf); 373 magtape[strlen(magtape) - 1] = '\0'; 374 } 375 #ifdef RRESTORE 376 if (host) 377 mt = rmtopen(magtape, 0); 378 else 379 #endif 380 mt = open(magtape, O_RDONLY, 0); 381 382 if (mt == -1) { 383 fprintf(stderr, "Cannot open %s\n", magtape); 384 volno = -1; 385 goto again; 386 } 387 gethdr: 388 volno = newvol; 389 setdumpnum(); 390 FLUSHTAPEBUF(); 391 if (gethead(&tmpbuf) == FAIL) { 392 dprintf(stdout, "header read failed at %d blocks\n", blksread); 393 fprintf(stderr, "tape is not dump tape\n"); 394 volno = 0; 395 goto again; 396 } 397 if (tmpbuf.c_volume != volno) { 398 fprintf(stderr, 399 "Volume mismatch: expecting %d, tape header claims it is %d\n", 400 volno, tmpbuf.c_volume); 401 volno = 0; 402 goto again; 403 } 404 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) { 405 time_t ttime = tmpbuf.c_date; 406 fprintf(stderr, "Wrong dump date\n\tgot: %s", 407 ctime(&ttime)); 408 fprintf(stderr, "\twanted: %s", ctime(&dumpdate)); 409 volno = 0; 410 goto again; 411 } 412 tapesread |= 1 << volno; 413 blksread = savecnt; 414 /* 415 * If continuing from the previous volume, skip over any 416 * blocks read already at the end of the previous volume. 417 * 418 * If coming to this volume at random, skip to the beginning 419 * of the next record. 420 */ 421 dprintf(stdout, "read %ld recs, tape starts with %ld\n", 422 (long)tpblksread, (long)tmpbuf.c_firstrec); 423 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) { 424 if (!wantnext) { 425 tpblksread = tmpbuf.c_firstrec; 426 for (i = tmpbuf.c_count; i > 0; i--) 427 readtape(buf); 428 } else if (tmpbuf.c_firstrec > 0 && 429 tmpbuf.c_firstrec < tpblksread - 1) { 430 /* 431 * -1 since we've read the volume header 432 */ 433 i = tpblksread - tmpbuf.c_firstrec - 1; 434 dprintf(stderr, "Skipping %d duplicate record%s.\n", 435 i, i > 1 ? "s" : ""); 436 while (--i >= 0) 437 readtape(buf); 438 } 439 } 440 if (curfile.action == USING) { 441 if (volno == 1) 442 panic("active file into volume 1\n"); 443 return; 444 } 445 /* 446 * Skip up to the beginning of the next record 447 */ 448 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) 449 for (i = tmpbuf.c_count; i > 0; i--) 450 readtape(buf); 451 (void) gethead(&spcl); 452 findinode(&spcl); 453 if (gettingfile) { 454 gettingfile = 0; 455 longjmp(restart, 1); 456 } 457 } 458 459 /* 460 * Handle unexpected EOF. 461 */ 462 static void 463 terminateinput() 464 { 465 466 if (gettingfile && curfile.action == USING) { 467 printf("Warning: %s %s\n", 468 "End-of-input encountered while extracting", curfile.name); 469 } 470 curfile.name = "<name unknown>"; 471 curfile.action = UNKNOWN; 472 curfile.dip = NULL; 473 curfile.ino = maxino; 474 if (gettingfile) { 475 gettingfile = 0; 476 longjmp(restart, 1); 477 } 478 } 479 480 /* 481 * handle multiple dumps per tape by skipping forward to the 482 * appropriate one. 483 */ 484 static void 485 setdumpnum() 486 { 487 struct mtop tcom; 488 489 if (dumpnum == 1 || volno != 1) 490 return; 491 if (pipein) { 492 fprintf(stderr, "Cannot have multiple dumps on pipe input\n"); 493 exit(1); 494 } 495 tcom.mt_op = MTFSF; 496 tcom.mt_count = dumpnum - 1; 497 #ifdef RRESTORE 498 if (host) 499 rmtioctl(MTFSF, dumpnum - 1); 500 else 501 #endif 502 if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0) 503 fprintf(stderr, "ioctl MTFSF: %s\n", strerror(errno)); 504 } 505 506 void 507 printdumpinfo() 508 { 509 time_t ttime; 510 511 ttime = spcl.c_date; 512 fprintf(stdout, "Dump date: %s", ctime(&ttime)); 513 ttime = spcl.c_ddate; 514 fprintf(stdout, "Dumped from: %s", 515 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&ttime)); 516 fprintf(stderr, "Level %d dump of %s on %s:%s\n", 517 spcl.c_level, spcl.c_filesys, 518 *spcl.c_host? spcl.c_host: "[unknown]", spcl.c_dev); 519 fprintf(stderr, "Label: %s\n", spcl.c_label); 520 } 521 522 int 523 extractfile(name) 524 char *name; 525 { 526 int flags; 527 uid_t uid; 528 gid_t gid; 529 mode_t mode; 530 struct timeval timep[2]; 531 struct entry *ep; 532 533 curfile.name = name; 534 curfile.action = USING; 535 timep[0].tv_sec = curfile.dip->di_atime; 536 timep[0].tv_usec = curfile.dip->di_atimensec / 1000; 537 timep[1].tv_sec = curfile.dip->di_mtime; 538 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000; 539 uid = curfile.dip->di_uid; 540 gid = curfile.dip->di_gid; 541 mode = curfile.dip->di_mode; 542 flags = curfile.dip->di_flags; 543 switch (mode & IFMT) { 544 545 default: 546 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode); 547 skipfile(); 548 return (FAIL); 549 550 case IFSOCK: 551 vprintf(stdout, "skipped socket %s\n", name); 552 skipfile(); 553 return (GOOD); 554 555 case IFDIR: 556 if (mflag) { 557 ep = lookupname(name); 558 if (ep == NULL || ep->e_flags & EXTRACT) 559 panic("unextracted directory %s\n", name); 560 skipfile(); 561 return (GOOD); 562 } 563 vprintf(stdout, "extract file %s\n", name); 564 return (genliteraldir(name, curfile.ino)); 565 566 case IFLNK: 567 lnkbuf[0] = '\0'; 568 pathlen = 0; 569 getfile(xtrlnkfile, xtrlnkskip); 570 if (pathlen == 0) { 571 vprintf(stdout, 572 "%s: zero length symbolic link (ignored)\n", name); 573 return (GOOD); 574 } 575 if (uflag) 576 (void) unlink(name); 577 if (linkit(lnkbuf, name, SYMLINK) == GOOD) { 578 (void) lutimes(name, timep); 579 (void) lchown(name, uid, gid); 580 (void) lchmod(name, mode); 581 (void) lchflags(name, flags); 582 return (GOOD); 583 } 584 return (FAIL); 585 586 case IFCHR: 587 case IFBLK: 588 vprintf(stdout, "extract special file %s\n", name); 589 if (Nflag) { 590 skipfile(); 591 return (GOOD); 592 } 593 if (uflag) 594 (void) unlink(name); 595 if (mknod(name, (mode & (IFCHR | IFBLK)) | 0600, 596 (int)curfile.dip->di_rdev) < 0) { 597 fprintf(stderr, "%s: cannot create special file: %s\n", 598 name, strerror(errno)); 599 skipfile(); 600 return (FAIL); 601 } 602 skipfile(); 603 (void) utimes(name, timep); 604 (void) chown(name, uid, gid); 605 (void) chmod(name, mode); 606 (void) chflags(name, flags); 607 return (GOOD); 608 609 case IFIFO: 610 vprintf(stdout, "extract fifo %s\n", name); 611 if (Nflag) { 612 skipfile(); 613 return (GOOD); 614 } 615 if (uflag) 616 (void) unlink(name); 617 if (mkfifo(name, 0600) < 0) { 618 fprintf(stderr, "%s: cannot create fifo: %s\n", 619 name, strerror(errno)); 620 skipfile(); 621 return (FAIL); 622 } 623 skipfile(); 624 (void) utimes(name, timep); 625 (void) chown(name, uid, gid); 626 (void) chmod(name, mode); 627 (void) chflags(name, flags); 628 return (GOOD); 629 630 case IFREG: 631 vprintf(stdout, "extract file %s\n", name); 632 if (Nflag) { 633 skipfile(); 634 return (GOOD); 635 } 636 if (uflag) 637 (void) unlink(name); 638 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 639 0600)) < 0) { 640 fprintf(stderr, "%s: cannot create file: %s\n", 641 name, strerror(errno)); 642 skipfile(); 643 return (FAIL); 644 } 645 getfile(xtrfile, xtrskip); 646 (void) futimes(ofile, timep); 647 (void) fchown(ofile, uid, gid); 648 (void) fchmod(ofile, mode); 649 (void) fchflags(ofile, flags); 650 (void) close(ofile); 651 return (GOOD); 652 } 653 /* NOTREACHED */ 654 } 655 656 /* 657 * skip over bit maps on the tape 658 */ 659 void 660 skipmaps() 661 { 662 663 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI) 664 skipfile(); 665 } 666 667 /* 668 * skip over a file on the tape 669 */ 670 void 671 skipfile() 672 { 673 674 curfile.action = SKIP; 675 getfile(xtrnull, xtrnull); 676 } 677 678 /* 679 * Extract a file from the tape. 680 * When an allocated block is found it is passed to the fill function; 681 * when an unallocated block (hole) is found, a zeroed buffer is passed 682 * to the skip function. 683 */ 684 void 685 getfile(fill, skip) 686 void (*fill) __P((char *, long)); 687 void (*skip) __P((char *, long)); 688 { 689 int i; 690 int curblk = 0; 691 quad_t size = spcl.c_dinode.di_size; 692 static char clearedbuf[MAXBSIZE]; 693 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE]; 694 char junk[TP_BSIZE]; 695 696 #ifdef __GNUC__ /* XXX: to shut up gcc warnings */ 697 (void)&curblk; 698 (void)&size; 699 #endif 700 701 if (spcl.c_type == TS_END) 702 panic("ran off end of tape\n"); 703 if (spcl.c_magic != NFS_MAGIC) 704 panic("not at beginning of a file\n"); 705 if (!gettingfile && setjmp(restart) != 0) 706 return; 707 gettingfile++; 708 loop: 709 for (i = 0; i < spcl.c_count; i++) { 710 if (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI || 711 spcl.c_addr[i]) { 712 readtape(&buf[curblk++][0]); 713 if (curblk == fssize / TP_BSIZE) { 714 (*fill)((char *)buf, (long)(size > TP_BSIZE ? 715 fssize : (curblk - 1) * TP_BSIZE + size)); 716 curblk = 0; 717 } 718 } else { 719 if (curblk > 0) { 720 (*fill)((char *)buf, (long)(size > TP_BSIZE ? 721 curblk * TP_BSIZE : 722 (curblk - 1) * TP_BSIZE + size)); 723 curblk = 0; 724 } 725 (*skip)(clearedbuf, (long)(size > TP_BSIZE ? 726 TP_BSIZE : size)); 727 } 728 if ((size -= TP_BSIZE) <= 0) { 729 if (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI) { 730 /* 731 * In this case, the following expression 732 * should always be false since the size was 733 * initially set to spcl.c_dinode.di_size and 734 * it is initialized to spcl.c_count * TP_BSIZE 735 * in gethead(). 736 */ 737 if (!(size == 0 && i == spcl.c_count - 1)) 738 panic("inconsistent map size\n"); 739 } else { 740 for (i++; i < spcl.c_count; i++) 741 if (spcl.c_addr[i]) 742 readtape(junk); 743 } 744 break; 745 } 746 } 747 if (gethead(&spcl) == GOOD && size > 0) { 748 if (spcl.c_type == TS_ADDR) 749 goto loop; 750 dprintf(stdout, 751 "Missing address (header) block for %s at %d blocks\n", 752 curfile.name, blksread); 753 } 754 if (curblk > 0) 755 (*fill)((char *)buf, (long)((curblk * TP_BSIZE) + size)); 756 findinode(&spcl); 757 gettingfile = 0; 758 } 759 760 /* 761 * Write out the next block of a file. 762 */ 763 static void 764 xtrfile(buf, size) 765 char *buf; 766 long size; 767 { 768 769 if (Nflag) 770 return; 771 if (write(ofile, buf, (int) size) == -1) { 772 fprintf(stderr, 773 "write error extracting inode %d, name %s\nwrite: %s\n", 774 curfile.ino, curfile.name, strerror(errno)); 775 exit(1); 776 } 777 } 778 779 /* 780 * Skip over a hole in a file. 781 */ 782 /* ARGSUSED */ 783 static void 784 xtrskip(buf, size) 785 char *buf; 786 long size; 787 { 788 789 if (lseek(ofile, size, SEEK_CUR) == -1) { 790 fprintf(stderr, 791 "seek error extracting inode %d, name %s\nlseek: %s\n", 792 curfile.ino, curfile.name, strerror(errno)); 793 exit(1); 794 } 795 } 796 797 /* 798 * Collect the next block of a symbolic link. 799 */ 800 static void 801 xtrlnkfile(buf, size) 802 char *buf; 803 long size; 804 { 805 806 pathlen += size; 807 if (pathlen > MAXPATHLEN) { 808 fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n", 809 curfile.name, lnkbuf, buf, pathlen); 810 exit(1); 811 } 812 (void) strcat(lnkbuf, buf); 813 } 814 815 /* 816 * Skip over a hole in a symbolic link (should never happen). 817 */ 818 /* ARGSUSED */ 819 static void 820 xtrlnkskip(buf, size) 821 char *buf; 822 long size; 823 { 824 825 fprintf(stderr, "unallocated block in symbolic link %s\n", 826 curfile.name); 827 exit(1); 828 } 829 830 /* 831 * Collect the next block of a bit map. 832 */ 833 static void 834 xtrmap(buf, size) 835 char *buf; 836 long size; 837 { 838 839 memmove(map, buf, size); 840 map += size; 841 } 842 843 /* 844 * Skip over a hole in a bit map (should never happen). 845 */ 846 /* ARGSUSED */ 847 static void 848 xtrmapskip(buf, size) 849 char *buf; 850 long size; 851 { 852 853 panic("hole in map\n"); 854 map += size; 855 } 856 857 /* 858 * Noop, when an extraction function is not needed. 859 */ 860 /* ARGSUSED */ 861 void 862 xtrnull(buf, size) 863 char *buf; 864 long size; 865 { 866 867 return; 868 } 869 870 /* 871 * Read TP_BSIZE blocks from the input. 872 * Handle read errors, and end of media. 873 */ 874 static void 875 readtape(buf) 876 char *buf; 877 { 878 int rd, newvol, i; 879 int cnt, seek_failed; 880 881 if (blkcnt < numtrec) { 882 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE); 883 blksread++; 884 tpblksread++; 885 return; 886 } 887 for (i = 0; i < ntrec; i++) 888 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; 889 if (numtrec == 0) 890 numtrec = ntrec; 891 cnt = ntrec * TP_BSIZE; 892 rd = 0; 893 getmore: 894 #ifdef RRESTORE 895 if (host) 896 i = rmtread(&tapebuf[rd], cnt); 897 else 898 #endif 899 i = read(mt, &tapebuf[rd], cnt); 900 /* 901 * Check for mid-tape short read error. 902 * If found, skip rest of buffer and start with the next. 903 */ 904 if (!pipein && numtrec < ntrec && i > 0) { 905 dprintf(stdout, "mid-media short read error.\n"); 906 numtrec = ntrec; 907 } 908 /* 909 * Handle partial block read. 910 */ 911 if (pipein && i == 0 && rd > 0) 912 i = rd; 913 else if (i > 0 && i != ntrec * TP_BSIZE) { 914 if (pipein) { 915 rd += i; 916 cnt -= i; 917 if (cnt > 0) 918 goto getmore; 919 i = rd; 920 } else { 921 /* 922 * Short read. Process the blocks read. 923 */ 924 if (i % TP_BSIZE != 0) 925 vprintf(stdout, 926 "partial block read: %d should be %d\n", 927 i, ntrec * TP_BSIZE); 928 numtrec = i / TP_BSIZE; 929 } 930 } 931 /* 932 * Handle read error. 933 */ 934 if (i < 0) { 935 fprintf(stderr, "Tape read error while "); 936 switch (curfile.action) { 937 default: 938 fprintf(stderr, "trying to set up tape\n"); 939 break; 940 case UNKNOWN: 941 fprintf(stderr, "trying to resynchronize\n"); 942 break; 943 case USING: 944 fprintf(stderr, "restoring %s\n", curfile.name); 945 break; 946 case SKIP: 947 fprintf(stderr, "skipping over inode %d\n", 948 curfile.ino); 949 break; 950 } 951 if (!yflag && !reply("continue")) 952 exit(1); 953 i = ntrec * TP_BSIZE; 954 memset(tapebuf, 0, i); 955 #ifdef RRESTORE 956 if (host) 957 seek_failed = (rmtseek(i, 1) < 0); 958 else 959 #endif 960 seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1); 961 962 if (seek_failed) { 963 fprintf(stderr, 964 "continuation failed: %s\n", strerror(errno)); 965 exit(1); 966 } 967 } 968 /* 969 * Handle end of tape. 970 */ 971 if (i == 0) { 972 vprintf(stdout, "End-of-tape encountered\n"); 973 if (!pipein) { 974 newvol = volno + 1; 975 volno = 0; 976 numtrec = 0; 977 getvol(newvol); 978 readtape(buf); 979 return; 980 } 981 if (rd % TP_BSIZE != 0) 982 panic("partial block read: %d should be %d\n", 983 rd, ntrec * TP_BSIZE); 984 terminateinput(); 985 memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE); 986 } 987 blkcnt = 0; 988 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE); 989 blksread++; 990 tpblksread++; 991 } 992 993 static void 994 findtapeblksize() 995 { 996 long i; 997 998 for (i = 0; i < ntrec; i++) 999 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; 1000 blkcnt = 0; 1001 #ifdef RRESTORE 1002 if (host) 1003 i = rmtread(tapebuf, ntrec * TP_BSIZE); 1004 else 1005 #endif 1006 i = read(mt, tapebuf, ntrec * TP_BSIZE); 1007 1008 if (i <= 0) { 1009 fprintf(stderr, "tape read error: %s\n", strerror(errno)); 1010 exit(1); 1011 } 1012 if (i % TP_BSIZE != 0) { 1013 fprintf(stderr, "Tape block size (%ld) %s (%ld)\n", 1014 (long)i, "is not a multiple of dump block size", 1015 (long)TP_BSIZE); 1016 exit(1); 1017 } 1018 ntrec = i / TP_BSIZE; 1019 numtrec = ntrec; 1020 vprintf(stdout, "Tape block size is %d\n", ntrec); 1021 } 1022 1023 void 1024 closemt() 1025 { 1026 1027 if (mt < 0) 1028 return; 1029 #ifdef RRESTORE 1030 if (host) 1031 rmtclose(); 1032 else 1033 #endif 1034 (void) close(mt); 1035 } 1036 1037 /* 1038 * Read the next block from the tape. 1039 * Check to see if it is one of several vintage headers. 1040 * If it is an old style header, convert it to a new style header. 1041 * If it is not any valid header, return an error. 1042 */ 1043 static int 1044 gethead(buf) 1045 struct s_spcl *buf; 1046 { 1047 long i; 1048 union { 1049 quad_t qval; 1050 int32_t val[2]; 1051 } qcvt; 1052 union u_ospcl { 1053 char dummy[TP_BSIZE]; 1054 struct s_ospcl { 1055 int32_t c_type; 1056 int32_t c_date; 1057 int32_t c_ddate; 1058 int32_t c_volume; 1059 int32_t c_tapea; 1060 u_int16_t c_inumber; 1061 int32_t c_magic; 1062 int32_t c_checksum; 1063 struct odinode { 1064 unsigned short odi_mode; 1065 u_int16_t odi_nlink; 1066 u_int16_t odi_uid; 1067 u_int16_t odi_gid; 1068 int32_t odi_size; 1069 int32_t odi_rdev; 1070 char odi_addr[36]; 1071 int32_t odi_atime; 1072 int32_t odi_mtime; 1073 int32_t odi_ctime; 1074 } c_dinode; 1075 int32_t c_count; 1076 char c_addr[256]; 1077 } s_ospcl; 1078 } u_ospcl; 1079 1080 if (!cvtflag) { 1081 readtape((char *)buf); 1082 if (buf->c_magic != NFS_MAGIC) { 1083 if (swabl(buf->c_magic) != NFS_MAGIC) 1084 return (FAIL); 1085 if (!Bcvt) { 1086 vprintf(stdout, "Note: Doing Byte swapping\n"); 1087 Bcvt = 1; 1088 } 1089 } 1090 if (checksum((int *)buf) == FAIL) 1091 return (FAIL); 1092 if (Bcvt) 1093 swabst((u_char *)"8l4s31l528b1l192b2l", (u_char *)buf); 1094 goto good; 1095 } 1096 readtape((char *)(&u_ospcl.s_ospcl)); 1097 memset(buf, 0, (long)TP_BSIZE); 1098 buf->c_type = u_ospcl.s_ospcl.c_type; 1099 buf->c_date = u_ospcl.s_ospcl.c_date; 1100 buf->c_ddate = u_ospcl.s_ospcl.c_ddate; 1101 buf->c_volume = u_ospcl.s_ospcl.c_volume; 1102 buf->c_tapea = u_ospcl.s_ospcl.c_tapea; 1103 buf->c_inumber = u_ospcl.s_ospcl.c_inumber; 1104 buf->c_checksum = u_ospcl.s_ospcl.c_checksum; 1105 buf->c_magic = u_ospcl.s_ospcl.c_magic; 1106 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode; 1107 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink; 1108 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid; 1109 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid; 1110 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size; 1111 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev; 1112 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime; 1113 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime; 1114 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime; 1115 buf->c_count = u_ospcl.s_ospcl.c_count; 1116 memmove(buf->c_addr, u_ospcl.s_ospcl.c_addr, (long)256); 1117 if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC || 1118 checksum((int *)(&u_ospcl.s_ospcl)) == FAIL) 1119 return(FAIL); 1120 buf->c_magic = NFS_MAGIC; 1121 1122 good: 1123 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) && 1124 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) { 1125 qcvt.qval = buf->c_dinode.di_size; 1126 if (qcvt.val[0] || qcvt.val[1]) { 1127 printf("Note: Doing Quad swapping\n"); 1128 Qcvt = 1; 1129 } 1130 } 1131 if (Qcvt) { 1132 qcvt.qval = buf->c_dinode.di_size; 1133 i = qcvt.val[1]; 1134 qcvt.val[1] = qcvt.val[0]; 1135 qcvt.val[0] = i; 1136 buf->c_dinode.di_size = qcvt.qval; 1137 } 1138 1139 switch (buf->c_type) { 1140 1141 case TS_CLRI: 1142 case TS_BITS: 1143 /* 1144 * Have to patch up missing information in bit map headers 1145 */ 1146 buf->c_inumber = 0; 1147 buf->c_dinode.di_size = buf->c_count * TP_BSIZE; 1148 break; 1149 1150 case TS_TAPE: 1151 if ((buf->c_flags & DR_NEWINODEFMT) == 0) 1152 oldinofmt = 1; 1153 /* fall through */ 1154 case TS_END: 1155 buf->c_inumber = 0; 1156 break; 1157 1158 case TS_INODE: 1159 case TS_ADDR: 1160 break; 1161 1162 default: 1163 panic("gethead: unknown inode type %d\n", buf->c_type); 1164 break; 1165 } 1166 /* 1167 * If we are restoring a filesystem with old format inodes, 1168 * copy the uid/gid to the new location. 1169 */ 1170 if (oldinofmt) { 1171 buf->c_dinode.di_uid = buf->c_dinode.di_ouid; 1172 buf->c_dinode.di_gid = buf->c_dinode.di_ogid; 1173 } 1174 if (dflag) 1175 accthdr(buf); 1176 return(GOOD); 1177 } 1178 1179 /* 1180 * Check that a header is where it belongs and predict the next header 1181 */ 1182 static void 1183 accthdr(header) 1184 struct s_spcl *header; 1185 { 1186 static ino_t previno = 0x7fffffff; 1187 static int prevtype; 1188 static long predict; 1189 long blks, i; 1190 1191 if (header->c_type == TS_TAPE) { 1192 fprintf(stderr, "Volume header (%s inode format) ", 1193 oldinofmt ? "old" : "new"); 1194 if (header->c_firstrec) 1195 fprintf(stderr, "begins with record %d", 1196 header->c_firstrec); 1197 fprintf(stderr, "\n"); 1198 previno = 0x7fffffff; 1199 return; 1200 } 1201 if (previno == 0x7fffffff) 1202 goto newcalc; 1203 switch (prevtype) { 1204 case TS_BITS: 1205 fprintf(stderr, "Dumped inodes map header"); 1206 break; 1207 case TS_CLRI: 1208 fprintf(stderr, "Used inodes map header"); 1209 break; 1210 case TS_INODE: 1211 fprintf(stderr, "File header, ino %d", previno); 1212 break; 1213 case TS_ADDR: 1214 fprintf(stderr, "File continuation header, ino %d", previno); 1215 break; 1216 case TS_END: 1217 fprintf(stderr, "End of tape header"); 1218 break; 1219 } 1220 if (predict != blksread - 1) 1221 fprintf(stderr, "; predicted %ld blocks, got %ld blocks", 1222 (long)predict, (long)(blksread - 1)); 1223 fprintf(stderr, "\n"); 1224 newcalc: 1225 blks = 0; 1226 switch (header->c_type) { 1227 case TS_END: 1228 break; 1229 case TS_CLRI: 1230 case TS_BITS: 1231 blks = header->c_count; 1232 break; 1233 default: 1234 for (i = 0; i < header->c_count; i++) 1235 if (header->c_addr[i] != 0) 1236 blks++; 1237 break; 1238 } 1239 predict = blks; 1240 blksread = 0; 1241 prevtype = header->c_type; 1242 previno = header->c_inumber; 1243 } 1244 1245 /* 1246 * Find an inode header. 1247 * Complain if had to skip, and complain is set. 1248 */ 1249 static void 1250 findinode(header) 1251 struct s_spcl *header; 1252 { 1253 static long skipcnt = 0; 1254 long i; 1255 char buf[TP_BSIZE]; 1256 1257 curfile.name = "<name unknown>"; 1258 curfile.action = UNKNOWN; 1259 curfile.dip = NULL; 1260 curfile.ino = 0; 1261 top: 1262 do { 1263 if (header->c_magic != NFS_MAGIC) { 1264 skipcnt++; 1265 while (gethead(header) == FAIL || 1266 header->c_date != dumpdate) 1267 skipcnt++; 1268 } 1269 switch (header->c_type) { 1270 1271 case TS_ADDR: 1272 /* 1273 * Skip up to the beginning of the next record 1274 */ 1275 for (i = 0; i < header->c_count; i++) 1276 if (header->c_addr[i]) 1277 readtape(buf); 1278 while (gethead(header) == FAIL || 1279 header->c_date != dumpdate) 1280 skipcnt++; 1281 /* We've read a header; don't drop it. */ 1282 goto top; 1283 1284 case TS_INODE: 1285 curfile.dip = &header->c_dinode; 1286 curfile.ino = header->c_inumber; 1287 break; 1288 1289 case TS_END: 1290 curfile.ino = maxino; 1291 break; 1292 1293 case TS_CLRI: 1294 curfile.name = "<file removal list>"; 1295 break; 1296 1297 case TS_BITS: 1298 curfile.name = "<file dump list>"; 1299 break; 1300 1301 case TS_TAPE: 1302 panic("unexpected tape header\n"); 1303 break; 1304 1305 default: 1306 panic("unknown tape header type %d\n", spcl.c_type); 1307 break; 1308 1309 } 1310 } while (header->c_type == TS_ADDR); 1311 if (skipcnt > 0) 1312 fprintf(stderr, "resync restore, skipped %ld blocks\n", 1313 (long)skipcnt); 1314 skipcnt = 0; 1315 } 1316 1317 static int 1318 checksum(buf) 1319 int *buf; 1320 { 1321 int i, j; 1322 1323 j = sizeof(union u_spcl) / sizeof(int); 1324 i = 0; 1325 if(!Bcvt) { 1326 do 1327 i += *buf++; 1328 while (--j); 1329 } else { 1330 /* What happens if we want to read restore tapes 1331 for a 16bit int machine??? */ 1332 do 1333 i += swabl(*buf++); 1334 while (--j); 1335 } 1336 1337 if (i != CHECKSUM) { 1338 fprintf(stderr, "Checksum error %o, inode %d file %s\n", i, 1339 curfile.ino, curfile.name); 1340 return(FAIL); 1341 } 1342 return(GOOD); 1343 } 1344 1345 #ifdef RRESTORE 1346 #include <stdarg.h> 1347 1348 void 1349 msg(const char *fmt, ...) 1350 { 1351 va_list ap; 1352 1353 va_start(ap, fmt); 1354 (void)vfprintf(stderr, fmt, ap); 1355 va_end(ap); 1356 } 1357 #endif /* RRESTORE */ 1358 1359 static u_char * 1360 swabshort(sp, n) 1361 u_char *sp; 1362 int n; 1363 { 1364 char c; 1365 1366 while (--n >= 0) { 1367 c = sp[0]; sp[0] = sp[1]; sp[1] = c; 1368 sp += 2; 1369 } 1370 return (sp); 1371 } 1372 1373 static u_char * 1374 swablong(sp, n) 1375 u_char *sp; 1376 int n; 1377 { 1378 char c; 1379 1380 while (--n >= 0) { 1381 c = sp[0]; sp[0] = sp[3]; sp[3] = c; 1382 c = sp[2]; sp[2] = sp[1]; sp[1] = c; 1383 sp += 4; 1384 } 1385 return (sp); 1386 } 1387 1388 void 1389 swabst(cp, sp) 1390 u_char *cp, *sp; 1391 { 1392 int n = 0; 1393 1394 while (*cp) { 1395 switch (*cp) { 1396 case '0': case '1': case '2': case '3': case '4': 1397 case '5': case '6': case '7': case '8': case '9': 1398 n = (n * 10) + (*cp++ - '0'); 1399 continue; 1400 1401 case 's': case 'w': case 'h': 1402 if (n == 0) 1403 n = 1; 1404 sp = swabshort(sp, n); 1405 break; 1406 1407 case 'l': 1408 if (n == 0) 1409 n = 1; 1410 sp = swablong(sp, n); 1411 break; 1412 1413 default: /* Any other character, like 'b' counts as byte. */ 1414 if (n == 0) 1415 n = 1; 1416 sp += n; 1417 break; 1418 } 1419 cp++; 1420 n = 0; 1421 } 1422 } 1423 1424 static u_long 1425 swabl(x) 1426 u_long x; 1427 { 1428 swabst((u_char *)"l", (u_char *)&x); 1429 return (x); 1430 } 1431