tape.c revision 203155
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 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35#ifndef lint 36#if 0 37static char sccsid[] = "@(#)tape.c 8.9 (Berkeley) 5/1/95"; 38#endif 39#endif /* not lint */ 40 41#include <sys/cdefs.h> 42__FBSDID("$FreeBSD: head/sbin/restore/tape.c 203155 2010-01-29 10:00:42Z jh $"); 43 44#include <sys/param.h> 45#include <sys/file.h> 46#include <sys/mtio.h> 47#include <sys/stat.h> 48#include <sys/time.h> 49#include <sys/extattr.h> 50#include <sys/acl.h> 51 52#include <ufs/ufs/extattr.h> 53#include <ufs/ufs/dinode.h> 54#include <protocols/dumprestore.h> 55 56#include <errno.h> 57#include <limits.h> 58#include <paths.h> 59#include <setjmp.h> 60#include <stdint.h> 61#include <stdio.h> 62#include <stdlib.h> 63#include <string.h> 64#include <time.h> 65#include <timeconv.h> 66#include <unistd.h> 67 68#include "restore.h" 69#include "extern.h" 70 71static long fssize = MAXBSIZE; 72static int mt = -1; 73static int pipein = 0; 74static int pipecmdin = 0; 75static FILE *popenfp = NULL; 76static char *magtape; 77static int blkcnt; 78static int numtrec; 79static char *tapebuf; 80static union u_spcl endoftapemark; 81static long byteslide = 0; 82static long blksread; /* blocks read since last header */ 83static int64_t tapeaddr = 0; /* current TP_BSIZE tape record */ 84static long tapesread; 85static jmp_buf restart; 86static int gettingfile = 0; /* restart has a valid frame */ 87static char *host = NULL; 88static int readmapflag; 89 90static int ofile; 91static char *map; 92static char lnkbuf[MAXPATHLEN + 1]; 93static int pathlen; 94 95int Bcvt; /* Swap Bytes */ 96int oldinofmt; /* FreeBSD 1 inode format needs cvt */ 97 98#define FLUSHTAPEBUF() blkcnt = ntrec + 1 99 100char *namespace_names[] = EXTATTR_NAMESPACE_NAMES; 101 102static void accthdr(struct s_spcl *); 103static int checksum(int *); 104static void findinode(struct s_spcl *); 105static void findtapeblksize(void); 106static char *setupextattr(int); 107static void xtrattr(char *, long); 108static void set_extattr_link(char *, void *, int); 109static void set_extattr_fd(int, char *, void *, int); 110static int gethead(struct s_spcl *); 111static void readtape(char *); 112static void setdumpnum(void); 113static u_long swabl(u_long); 114static u_char *swablong(u_char *, int); 115static u_char *swabshort(u_char *, int); 116static void terminateinput(void); 117static void xtrfile(char *, long); 118static void xtrlnkfile(char *, long); 119static void xtrlnkskip(char *, long); 120static void xtrmap(char *, long); 121static void xtrmapskip(char *, long); 122static void xtrskip(char *, long); 123 124/* 125 * Set up an input source 126 */ 127void 128setinput(char *source, int ispipecommand) 129{ 130 FLUSHTAPEBUF(); 131 if (bflag) 132 newtapebuf(ntrec); 133 else 134 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC); 135 terminal = stdin; 136 137 if (ispipecommand) 138 pipecmdin++; 139 else 140#ifdef RRESTORE 141 if (strchr(source, ':')) { 142 host = source; 143 source = strchr(host, ':'); 144 *source++ = '\0'; 145 if (rmthost(host) == 0) 146 done(1); 147 } else 148#endif 149 if (strcmp(source, "-") == 0) { 150 /* 151 * Since input is coming from a pipe we must establish 152 * our own connection to the terminal. 153 */ 154 terminal = fopen(_PATH_TTY, "r"); 155 if (terminal == NULL) { 156 (void)fprintf(stderr, "cannot open %s: %s\n", 157 _PATH_TTY, strerror(errno)); 158 terminal = fopen(_PATH_DEVNULL, "r"); 159 if (terminal == NULL) { 160 (void)fprintf(stderr, "cannot open %s: %s\n", 161 _PATH_DEVNULL, strerror(errno)); 162 done(1); 163 } 164 } 165 pipein++; 166 } 167 setuid(getuid()); /* no longer need or want root privileges */ 168 magtape = strdup(source); 169 if (magtape == NULL) { 170 fprintf(stderr, "Cannot allocate space for magtape buffer\n"); 171 done(1); 172 } 173} 174 175void 176newtapebuf(long size) 177{ 178 static int tapebufsize = -1; 179 180 ntrec = size; 181 if (size <= tapebufsize) 182 return; 183 if (tapebuf != NULL) 184 free(tapebuf - TP_BSIZE); 185 tapebuf = malloc((size+1) * TP_BSIZE); 186 if (tapebuf == NULL) { 187 fprintf(stderr, "Cannot allocate space for tape buffer\n"); 188 done(1); 189 } 190 tapebuf += TP_BSIZE; 191 tapebufsize = size; 192} 193 194/* 195 * Verify that the tape drive can be accessed and 196 * that it actually is a dump tape. 197 */ 198void 199setup(void) 200{ 201 int i, j, *ip; 202 struct stat stbuf; 203 204 vprintf(stdout, "Verify tape and initialize maps\n"); 205 if (pipecmdin) { 206 if (setenv("RESTORE_VOLUME", "1", 1) == -1) { 207 fprintf(stderr, "Cannot set $RESTORE_VOLUME: %s\n", 208 strerror(errno)); 209 done(1); 210 } 211 popenfp = popen(magtape, "r"); 212 mt = popenfp ? fileno(popenfp) : -1; 213 } else 214#ifdef RRESTORE 215 if (host) 216 mt = rmtopen(magtape, 0); 217 else 218#endif 219 if (pipein) 220 mt = 0; 221 else 222 mt = open(magtape, O_RDONLY, 0); 223 if (mt < 0) { 224 fprintf(stderr, "%s: %s\n", magtape, strerror(errno)); 225 done(1); 226 } 227 volno = 1; 228 setdumpnum(); 229 FLUSHTAPEBUF(); 230 if (!pipein && !bflag) 231 findtapeblksize(); 232 if (gethead(&spcl) == FAIL) { 233 fprintf(stderr, "Tape is not a dump tape\n"); 234 done(1); 235 } 236 if (pipein) { 237 endoftapemark.s_spcl.c_magic = FS_UFS2_MAGIC; 238 endoftapemark.s_spcl.c_type = TS_END; 239 ip = (int *)&endoftapemark; 240 j = sizeof(union u_spcl) / sizeof(int); 241 i = 0; 242 do 243 i += *ip++; 244 while (--j); 245 endoftapemark.s_spcl.c_checksum = CHECKSUM - i; 246 } 247 if (vflag || command == 't') 248 printdumpinfo(); 249 dumptime = _time64_to_time(spcl.c_ddate); 250 dumpdate = _time64_to_time(spcl.c_date); 251 if (stat(".", &stbuf) < 0) { 252 fprintf(stderr, "cannot stat .: %s\n", strerror(errno)); 253 done(1); 254 } 255 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE ) 256 fssize = TP_BSIZE; 257 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE) 258 fssize = stbuf.st_blksize; 259 if (((fssize - 1) & fssize) != 0) { 260 fprintf(stderr, "bad block size %ld\n", fssize); 261 done(1); 262 } 263 if (spcl.c_volume != 1) { 264 fprintf(stderr, "Tape is not volume 1 of the dump\n"); 265 done(1); 266 } 267 if (gethead(&spcl) == FAIL) { 268 dprintf(stdout, "header read failed at %ld blocks\n", blksread); 269 panic("no header after volume mark!\n"); 270 } 271 findinode(&spcl); 272 if (spcl.c_type != TS_CLRI) { 273 fprintf(stderr, "Cannot find file removal list\n"); 274 done(1); 275 } 276 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1; 277 dprintf(stdout, "maxino = %d\n", maxino); 278 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY)); 279 if (map == NULL) 280 panic("no memory for active inode map\n"); 281 usedinomap = map; 282 curfile.action = USING; 283 getfile(xtrmap, xtrmapskip, xtrmapskip); 284 if (spcl.c_type != TS_BITS) { 285 fprintf(stderr, "Cannot find file dump list\n"); 286 done(1); 287 } 288 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY)); 289 if (map == (char *)NULL) 290 panic("no memory for file dump list\n"); 291 dumpmap = map; 292 curfile.action = USING; 293 getfile(xtrmap, xtrmapskip, xtrmapskip); 294 /* 295 * If there may be whiteout entries on the tape, pretend that the 296 * whiteout inode exists, so that the whiteout entries can be 297 * extracted. 298 */ 299 SETINO(WINO, dumpmap); 300 /* 'r' restores don't call getvol() for tape 1, so mark it as read. */ 301 if (command == 'r') 302 tapesread = 1; 303} 304 305/* 306 * Prompt user to load a new dump volume. 307 * "Nextvol" is the next suggested volume to use. 308 * This suggested volume is enforced when doing full 309 * or incremental restores, but can be overridden by 310 * the user when only extracting a subset of the files. 311 */ 312void 313getvol(long nextvol) 314{ 315 int64_t prevtapea; 316 long i, newvol, savecnt; 317 union u_spcl tmpspcl; 318# define tmpbuf tmpspcl.s_spcl 319 char buf[TP_BSIZE]; 320 321 if (nextvol == 1) { 322 tapesread = 0; 323 gettingfile = 0; 324 } 325 prevtapea = tapeaddr; 326 savecnt = blksread; 327 if (pipein) { 328 if (nextvol != 1) { 329 panic("Changing volumes on pipe input?\n"); 330 /* Avoid looping if we couldn't ask the user. */ 331 if (yflag || ferror(terminal) || feof(terminal)) 332 done(1); 333 } 334 if (volno == 1) 335 return; 336 if (pipecmdin) { 337 closemt(); 338 goto getpipecmdhdr; 339 } 340 goto gethdr; 341 } 342again: 343 if (pipein) 344 done(1); /* pipes do not get a second chance */ 345 if (command == 'R' || command == 'r' || curfile.action != SKIP) 346 newvol = nextvol; 347 else 348 newvol = 0; 349 while (newvol <= 0) { 350 if (tapesread == 0) { 351 fprintf(stderr, "%s%s%s%s%s%s%s", 352 "You have not read any tapes yet.\n", 353 "If you are extracting just a few files,", 354 " start with the last volume\n", 355 "and work towards the first; restore", 356 " can quickly skip tapes that\n", 357 "have no further files to extract.", 358 " Otherwise, begin with volume 1.\n"); 359 } else { 360 fprintf(stderr, "You have read volumes"); 361 strcpy(buf, ": "); 362 for (i = 0; i < 32; i++) 363 if (tapesread & (1 << i)) { 364 fprintf(stderr, "%s%ld", buf, i + 1); 365 strcpy(buf, ", "); 366 } 367 fprintf(stderr, "\n"); 368 } 369 do { 370 fprintf(stderr, "Specify next volume #: "); 371 (void) fflush(stderr); 372 if (fgets(buf, BUFSIZ, terminal) == NULL) 373 done(1); 374 } while (buf[0] == '\n'); 375 newvol = atoi(buf); 376 if (newvol <= 0) { 377 fprintf(stderr, 378 "Volume numbers are positive numerics\n"); 379 } 380 } 381 if (newvol == volno) { 382 tapesread |= 1 << (volno - 1); 383 return; 384 } 385 closemt(); 386 fprintf(stderr, "Mount tape volume %ld\n", newvol); 387 fprintf(stderr, "Enter ``none'' if there are no more tapes\n"); 388 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape); 389 (void) fflush(stderr); 390 if (fgets(buf, BUFSIZ, terminal) == NULL) 391 done(1); 392 if (!strcmp(buf, "none\n")) { 393 terminateinput(); 394 return; 395 } 396 if (buf[0] != '\n') { 397 (void) strcpy(magtape, buf); 398 magtape[strlen(magtape) - 1] = '\0'; 399 } 400 if (pipecmdin) { 401 char volno[sizeof("2147483647")]; 402 403getpipecmdhdr: 404 (void)sprintf(volno, "%ld", newvol); 405 if (setenv("RESTORE_VOLUME", volno, 1) == -1) { 406 fprintf(stderr, "Cannot set $RESTORE_VOLUME: %s\n", 407 strerror(errno)); 408 done(1); 409 } 410 popenfp = popen(magtape, "r"); 411 mt = popenfp ? fileno(popenfp) : -1; 412 } else 413#ifdef RRESTORE 414 if (host) 415 mt = rmtopen(magtape, 0); 416 else 417#endif 418 mt = open(magtape, O_RDONLY, 0); 419 420 if (mt == -1) { 421 fprintf(stderr, "Cannot open %s\n", magtape); 422 volno = -1; 423 goto again; 424 } 425gethdr: 426 volno = newvol; 427 setdumpnum(); 428 FLUSHTAPEBUF(); 429 if (gethead(&tmpbuf) == FAIL) { 430 dprintf(stdout, "header read failed at %ld blocks\n", blksread); 431 fprintf(stderr, "tape is not dump tape\n"); 432 volno = 0; 433 goto again; 434 } 435 if (tmpbuf.c_volume != volno) { 436 fprintf(stderr, "Wrong volume (%jd)\n", 437 (intmax_t)tmpbuf.c_volume); 438 volno = 0; 439 goto again; 440 } 441 if (_time64_to_time(tmpbuf.c_date) != dumpdate || 442 _time64_to_time(tmpbuf.c_ddate) != dumptime) { 443 time_t t = _time64_to_time(tmpbuf.c_date); 444 fprintf(stderr, "Wrong dump date\n\tgot: %s", ctime(&t)); 445 fprintf(stderr, "\twanted: %s", ctime(&dumpdate)); 446 volno = 0; 447 goto again; 448 } 449 tapesread |= 1 << (volno - 1); 450 blksread = savecnt; 451 /* 452 * If continuing from the previous volume, skip over any 453 * blocks read already at the end of the previous volume. 454 * 455 * If coming to this volume at random, skip to the beginning 456 * of the next record. 457 */ 458 dprintf(stdout, "last rec %jd, tape starts with %jd\n", 459 (intmax_t)prevtapea, (intmax_t)tmpbuf.c_tapea); 460 if (tmpbuf.c_type == TS_TAPE) { 461 if (curfile.action != USING) { 462 /* 463 * XXX Dump incorrectly sets c_count to 1 in the 464 * volume header of the first tape, so ignore 465 * c_count when volno == 1. 466 */ 467 if (volno != 1) 468 for (i = tmpbuf.c_count; i > 0; i--) 469 readtape(buf); 470 } else if (tmpbuf.c_tapea <= prevtapea) { 471 /* 472 * Normally the value of c_tapea in the volume 473 * header is the record number of the header itself. 474 * However in the volume header following an EOT- 475 * terminated tape, it is the record number of the 476 * first continuation data block (dump bug?). 477 * 478 * The next record we want is `prevtapea + 1'. 479 */ 480 i = prevtapea + 1 - tmpbuf.c_tapea; 481 dprintf(stderr, "Skipping %ld duplicate record%s.\n", 482 i, i > 1 ? "s" : ""); 483 while (--i >= 0) 484 readtape(buf); 485 } 486 } 487 if (curfile.action == USING) { 488 if (volno == 1) 489 panic("active file into volume 1\n"); 490 return; 491 } 492 (void) gethead(&spcl); 493 findinode(&spcl); 494 if (gettingfile) { 495 gettingfile = 0; 496 longjmp(restart, 1); 497 } 498} 499 500/* 501 * Handle unexpected EOF. 502 */ 503static void 504terminateinput(void) 505{ 506 507 if (gettingfile && curfile.action == USING) { 508 printf("Warning: %s %s\n", 509 "End-of-input encountered while extracting", curfile.name); 510 } 511 curfile.name = "<name unknown>"; 512 curfile.action = UNKNOWN; 513 curfile.mode = 0; 514 curfile.ino = maxino; 515 if (gettingfile) { 516 gettingfile = 0; 517 longjmp(restart, 1); 518 } 519} 520 521/* 522 * handle multiple dumps per tape by skipping forward to the 523 * appropriate one. 524 */ 525static void 526setdumpnum(void) 527{ 528 struct mtop tcom; 529 530 if (dumpnum == 1 || volno != 1) 531 return; 532 if (pipein) { 533 fprintf(stderr, "Cannot have multiple dumps on pipe input\n"); 534 done(1); 535 } 536 tcom.mt_op = MTFSF; 537 tcom.mt_count = dumpnum - 1; 538#ifdef RRESTORE 539 if (host) 540 rmtioctl(MTFSF, dumpnum - 1); 541 else 542#endif 543 if (!pipecmdin && ioctl(mt, MTIOCTOP, (char *)&tcom) < 0) 544 fprintf(stderr, "ioctl MTFSF: %s\n", strerror(errno)); 545} 546 547void 548printdumpinfo(void) 549{ 550 time_t t; 551 t = _time64_to_time(spcl.c_date); 552 fprintf(stdout, "Dump date: %s", ctime(&t)); 553 t = _time64_to_time(spcl.c_ddate); 554 fprintf(stdout, "Dumped from: %s", 555 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&t)); 556 if (spcl.c_host[0] == '\0') 557 return; 558 fprintf(stderr, "Level %jd dump of %s on %s:%s\n", 559 (intmax_t)spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev); 560 fprintf(stderr, "Label: %s\n", spcl.c_label); 561} 562 563int 564extractfile(char *name) 565{ 566 int flags; 567 uid_t uid; 568 gid_t gid; 569 mode_t mode; 570 int extsize; 571 struct timeval mtimep[2], ctimep[2]; 572 struct entry *ep; 573 char *buf; 574 575 curfile.name = name; 576 curfile.action = USING; 577 mtimep[0].tv_sec = curfile.atime_sec; 578 mtimep[0].tv_usec = curfile.atime_nsec / 1000; 579 mtimep[1].tv_sec = curfile.mtime_sec; 580 mtimep[1].tv_usec = curfile.mtime_nsec / 1000; 581 ctimep[0].tv_sec = curfile.atime_sec; 582 ctimep[0].tv_usec = curfile.atime_nsec / 1000; 583 ctimep[1].tv_sec = curfile.birthtime_sec; 584 ctimep[1].tv_usec = curfile.birthtime_nsec / 1000; 585 extsize = curfile.extsize; 586 uid = getuid(); 587 if (uid == 0) 588 uid = curfile.uid; 589 gid = curfile.gid; 590 mode = curfile.mode; 591 flags = curfile.file_flags; 592 switch (mode & IFMT) { 593 594 default: 595 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode); 596 skipfile(); 597 return (FAIL); 598 599 case IFSOCK: 600 vprintf(stdout, "skipped socket %s\n", name); 601 skipfile(); 602 return (GOOD); 603 604 case IFDIR: 605 if (mflag) { 606 ep = lookupname(name); 607 if (ep == NULL || ep->e_flags & EXTRACT) 608 panic("unextracted directory %s\n", name); 609 skipfile(); 610 return (GOOD); 611 } 612 vprintf(stdout, "extract file %s\n", name); 613 return (genliteraldir(name, curfile.ino)); 614 615 case IFLNK: 616 lnkbuf[0] = '\0'; 617 pathlen = 0; 618 buf = setupextattr(extsize); 619 getfile(xtrlnkfile, xtrattr, xtrlnkskip); 620 if (pathlen == 0) { 621 vprintf(stdout, 622 "%s: zero length symbolic link (ignored)\n", name); 623 return (GOOD); 624 } 625 if (linkit(lnkbuf, name, SYMLINK) == GOOD) { 626 if (extsize > 0) 627 set_extattr_link(name, buf, extsize); 628 (void) lchown(name, uid, gid); 629 (void) lchmod(name, mode); 630 (void) lutimes(name, ctimep); 631 (void) lutimes(name, mtimep); 632 (void) lchflags(name, flags); 633 return (GOOD); 634 } 635 return (FAIL); 636 637 case IFIFO: 638 vprintf(stdout, "extract fifo %s\n", name); 639 if (Nflag) { 640 skipfile(); 641 return (GOOD); 642 } 643 if (uflag) 644 (void) unlink(name); 645 if (mkfifo(name, 0600) < 0) { 646 fprintf(stderr, "%s: cannot create fifo: %s\n", 647 name, strerror(errno)); 648 skipfile(); 649 return (FAIL); 650 } 651 if (extsize == 0) { 652 skipfile(); 653 } else { 654 buf = setupextattr(extsize); 655 getfile(xtrnull, xtrattr, xtrnull); 656 set_extattr_file(name, buf, extsize); 657 } 658 (void) chown(name, uid, gid); 659 (void) chmod(name, mode); 660 (void) utimes(name, ctimep); 661 (void) utimes(name, mtimep); 662 (void) chflags(name, flags); 663 return (GOOD); 664 665 case IFCHR: 666 case IFBLK: 667 vprintf(stdout, "extract special file %s\n", name); 668 if (Nflag) { 669 skipfile(); 670 return (GOOD); 671 } 672 if (uflag) 673 (void) unlink(name); 674 if (mknod(name, (mode & (IFCHR | IFBLK)) | 0600, 675 (int)curfile.rdev) < 0) { 676 fprintf(stderr, "%s: cannot create special file: %s\n", 677 name, strerror(errno)); 678 skipfile(); 679 return (FAIL); 680 } 681 if (extsize == 0) { 682 skipfile(); 683 } else { 684 buf = setupextattr(extsize); 685 getfile(xtrnull, xtrattr, xtrnull); 686 set_extattr_file(name, buf, extsize); 687 } 688 (void) chown(name, uid, gid); 689 (void) chmod(name, mode); 690 (void) utimes(name, ctimep); 691 (void) utimes(name, mtimep); 692 (void) chflags(name, flags); 693 return (GOOD); 694 695 case IFREG: 696 vprintf(stdout, "extract file %s\n", name); 697 if (Nflag) { 698 skipfile(); 699 return (GOOD); 700 } 701 if (uflag) 702 (void) unlink(name); 703 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 704 0600)) < 0) { 705 fprintf(stderr, "%s: cannot create file: %s\n", 706 name, strerror(errno)); 707 skipfile(); 708 return (FAIL); 709 } 710 buf = setupextattr(extsize); 711 getfile(xtrfile, xtrattr, xtrskip); 712 if (extsize > 0) 713 set_extattr_fd(ofile, name, buf, extsize); 714 (void) fchown(ofile, uid, gid); 715 (void) fchmod(ofile, mode); 716 (void) futimes(ofile, ctimep); 717 (void) futimes(ofile, mtimep); 718 (void) fchflags(ofile, flags); 719 (void) close(ofile); 720 return (GOOD); 721 } 722 /* NOTREACHED */ 723} 724 725/* 726 * Set attributes for a file. 727 */ 728void 729set_extattr_file(char *name, void *buf, int size) 730{ 731 struct extattr *eap, *eaend; 732 733 vprintf(stdout, "Set attributes for %s:", name); 734 eaend = buf + size; 735 for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) { 736 /* 737 * Make sure this entry is complete. 738 */ 739 if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) { 740 dprintf(stdout, "\n\t%scorrupted", 741 eap == buf ? "" : "remainder "); 742 break; 743 } 744 if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY) 745 continue; 746 vprintf(stdout, "\n\t%s, (%d bytes), %*s", 747 namespace_names[eap->ea_namespace], eap->ea_length, 748 eap->ea_namelength, eap->ea_name); 749 /* 750 * First we try the general attribute setting interface. 751 * However, some attributes can only be set by root or 752 * by using special interfaces (for example, ACLs). 753 */ 754 if (extattr_set_file(name, eap->ea_namespace, eap->ea_name, 755 EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) { 756 dprintf(stdout, " (set using extattr_set_file)"); 757 continue; 758 } 759 /* 760 * If the general interface refuses to set the attribute, 761 * then we try all the specialized interfaces that we 762 * know about. 763 */ 764 if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM && 765 !strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) { 766 if (acl_set_file(name, ACL_TYPE_ACCESS, 767 EXTATTR_CONTENT(eap)) != -1) { 768 dprintf(stdout, " (set using acl_set_file)"); 769 continue; 770 } 771 } 772 if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM && 773 !strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) { 774 if (acl_set_file(name, ACL_TYPE_DEFAULT, 775 EXTATTR_CONTENT(eap)) != -1) { 776 dprintf(stdout, " (set using acl_set_file)"); 777 continue; 778 } 779 } 780 vprintf(stdout, " (unable to set)"); 781 } 782 vprintf(stdout, "\n"); 783} 784 785/* 786 * Set attributes for a symbolic link. 787 */ 788static void 789set_extattr_link(char *name, void *buf, int size) 790{ 791 struct extattr *eap, *eaend; 792 793 vprintf(stdout, "Set attributes for %s:", name); 794 eaend = buf + size; 795 for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) { 796 /* 797 * Make sure this entry is complete. 798 */ 799 if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) { 800 dprintf(stdout, "\n\t%scorrupted", 801 eap == buf ? "" : "remainder "); 802 break; 803 } 804 if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY) 805 continue; 806 vprintf(stdout, "\n\t%s, (%d bytes), %*s", 807 namespace_names[eap->ea_namespace], eap->ea_length, 808 eap->ea_namelength, eap->ea_name); 809 /* 810 * First we try the general attribute setting interface. 811 * However, some attributes can only be set by root or 812 * by using special interfaces (for example, ACLs). 813 */ 814 if (extattr_set_link(name, eap->ea_namespace, eap->ea_name, 815 EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) { 816 dprintf(stdout, " (set using extattr_set_link)"); 817 continue; 818 } 819 /* 820 * If the general interface refuses to set the attribute, 821 * then we try all the specialized interfaces that we 822 * know about. 823 */ 824 if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM && 825 !strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) { 826 if (acl_set_link_np(name, ACL_TYPE_ACCESS, 827 EXTATTR_CONTENT(eap)) != -1) { 828 dprintf(stdout, " (set using acl_set_link_np)"); 829 continue; 830 } 831 } 832 if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM && 833 !strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) { 834 if (acl_set_link_np(name, ACL_TYPE_DEFAULT, 835 EXTATTR_CONTENT(eap)) != -1) { 836 dprintf(stdout, " (set using acl_set_link_np)"); 837 continue; 838 } 839 } 840 vprintf(stdout, " (unable to set)"); 841 } 842 vprintf(stdout, "\n"); 843} 844 845/* 846 * Set attributes on a file descriptor. 847 */ 848static void 849set_extattr_fd(int fd, char *name, void *buf, int size) 850{ 851 struct extattr *eap, *eaend; 852 853 vprintf(stdout, "Set attributes for %s:", name); 854 eaend = buf + size; 855 for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) { 856 /* 857 * Make sure this entry is complete. 858 */ 859 if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) { 860 dprintf(stdout, "\n\t%scorrupted", 861 eap == buf ? "" : "remainder "); 862 break; 863 } 864 if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY) 865 continue; 866 vprintf(stdout, "\n\t%s, (%d bytes), %*s", 867 namespace_names[eap->ea_namespace], eap->ea_length, 868 eap->ea_namelength, eap->ea_name); 869 /* 870 * First we try the general attribute setting interface. 871 * However, some attributes can only be set by root or 872 * by using special interfaces (for example, ACLs). 873 */ 874 if (extattr_set_fd(fd, eap->ea_namespace, eap->ea_name, 875 EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) { 876 dprintf(stdout, " (set using extattr_set_fd)"); 877 continue; 878 } 879 /* 880 * If the general interface refuses to set the attribute, 881 * then we try all the specialized interfaces that we 882 * know about. 883 */ 884 if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM && 885 !strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) { 886 if (acl_set_fd(fd, EXTATTR_CONTENT(eap)) != -1) { 887 dprintf(stdout, " (set using acl_set_fd)"); 888 continue; 889 } 890 } 891 if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM && 892 !strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) { 893 if (acl_set_file(name, ACL_TYPE_DEFAULT, 894 EXTATTR_CONTENT(eap)) != -1) { 895 dprintf(stdout, " (set using acl_set_file)"); 896 continue; 897 } 898 } 899 vprintf(stdout, " (unable to set)"); 900 } 901 vprintf(stdout, "\n"); 902} 903 904/* 905 * skip over bit maps on the tape 906 */ 907void 908skipmaps(void) 909{ 910 911 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI) 912 skipfile(); 913} 914 915/* 916 * skip over a file on the tape 917 */ 918void 919skipfile(void) 920{ 921 922 curfile.action = SKIP; 923 getfile(xtrnull, xtrnull, xtrnull); 924} 925 926/* 927 * Extract a file from the tape. 928 * When an allocated block is found it is passed to the fill function; 929 * when an unallocated block (hole) is found, a zeroed buffer is passed 930 * to the skip function. 931 */ 932void 933getfile(void (*datafill)(char *, long), void (*attrfill)(char *, long), 934 void (*skip)(char *, long)) 935{ 936 int i; 937 off_t size; 938 int curblk, attrsize; 939 void (*fillit)(char *, long); 940 static char clearedbuf[MAXBSIZE]; 941 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE]; 942 char junk[TP_BSIZE]; 943 944 curblk = 0; 945 size = spcl.c_size; 946 attrsize = spcl.c_extsize; 947 if (spcl.c_type == TS_END) 948 panic("ran off end of tape\n"); 949 if (spcl.c_magic != FS_UFS2_MAGIC) 950 panic("not at beginning of a file\n"); 951 if (!gettingfile && setjmp(restart) != 0) 952 return; 953 gettingfile++; 954 fillit = datafill; 955 if (size == 0 && attrsize > 0) { 956 fillit = attrfill; 957 size = attrsize; 958 attrsize = 0; 959 } 960loop: 961 for (i = 0; i < spcl.c_count; i++) { 962 if (!readmapflag && i > TP_NINDIR) { 963 if (Dflag) { 964 fprintf(stderr, "spcl.c_count = %jd\n", 965 (intmax_t)spcl.c_count); 966 break; 967 } else 968 panic("spcl.c_count = %jd\n", 969 (intmax_t)spcl.c_count); 970 } 971 if (readmapflag || spcl.c_addr[i]) { 972 readtape(&buf[curblk++][0]); 973 if (curblk == fssize / TP_BSIZE) { 974 (*fillit)((char *)buf, (long)(size > TP_BSIZE ? 975 fssize : (curblk - 1) * TP_BSIZE + size)); 976 curblk = 0; 977 } 978 } else { 979 if (curblk > 0) { 980 (*fillit)((char *)buf, (long)(size > TP_BSIZE ? 981 curblk * TP_BSIZE : 982 (curblk - 1) * TP_BSIZE + size)); 983 curblk = 0; 984 } 985 (*skip)(clearedbuf, (long)(size > TP_BSIZE ? 986 TP_BSIZE : size)); 987 } 988 if ((size -= TP_BSIZE) <= 0) { 989 if (size > -TP_BSIZE && curblk > 0) { 990 (*fillit)((char *)buf, 991 (long)((curblk * TP_BSIZE) + size)); 992 curblk = 0; 993 } 994 if (attrsize > 0) { 995 fillit = attrfill; 996 size = attrsize; 997 attrsize = 0; 998 continue; 999 } 1000 if (spcl.c_count - i > 1) 1001 dprintf(stdout, "skipping %d junk block(s)\n", 1002 spcl.c_count - i - 1); 1003 for (i++; i < spcl.c_count; i++) { 1004 if (!readmapflag && i > TP_NINDIR) { 1005 if (Dflag) { 1006 fprintf(stderr, 1007 "spcl.c_count = %jd\n", 1008 (intmax_t)spcl.c_count); 1009 break; 1010 } else 1011 panic("spcl.c_count = %jd\n", 1012 (intmax_t)spcl.c_count); 1013 } 1014 if (readmapflag || spcl.c_addr[i]) 1015 readtape(junk); 1016 } 1017 break; 1018 } 1019 } 1020 if (gethead(&spcl) == GOOD && size > 0) { 1021 if (spcl.c_type == TS_ADDR) 1022 goto loop; 1023 dprintf(stdout, 1024 "Missing address (header) block for %s at %ld blocks\n", 1025 curfile.name, blksread); 1026 } 1027 if (curblk > 0) 1028 panic("getfile: lost data\n"); 1029 findinode(&spcl); 1030 gettingfile = 0; 1031} 1032 1033/* 1034 * These variables are shared between the next two functions. 1035 */ 1036static int extbufsize = 0; 1037static char *extbuf; 1038static int extloc; 1039 1040/* 1041 * Allocate a buffer into which to extract extended attributes. 1042 */ 1043static char * 1044setupextattr(int extsize) 1045{ 1046 1047 extloc = 0; 1048 if (extsize <= extbufsize) 1049 return (extbuf); 1050 if (extbufsize > 0) 1051 free(extbuf); 1052 if ((extbuf = malloc(extsize)) != NULL) { 1053 extbufsize = extsize; 1054 return (extbuf); 1055 } 1056 extbufsize = 0; 1057 extbuf = NULL; 1058 fprintf(stderr, "Cannot extract %d bytes %s for inode %d, name %s\n", 1059 extsize, "of extended attributes", curfile.ino, curfile.name); 1060 return (NULL); 1061} 1062 1063/* 1064 * Extract the next block of extended attributes. 1065 */ 1066static void 1067xtrattr(char *buf, long size) 1068{ 1069 1070 if (extloc + size > extbufsize) 1071 panic("overrun attribute buffer\n"); 1072 memmove(&extbuf[extloc], buf, size); 1073 extloc += size; 1074} 1075 1076/* 1077 * Write out the next block of a file. 1078 */ 1079static void 1080xtrfile(char *buf, long size) 1081{ 1082 1083 if (Nflag) 1084 return; 1085 if (write(ofile, buf, (int) size) == -1) { 1086 fprintf(stderr, 1087 "write error extracting inode %d, name %s\nwrite: %s\n", 1088 curfile.ino, curfile.name, strerror(errno)); 1089 } 1090} 1091 1092/* 1093 * Skip over a hole in a file. 1094 */ 1095/* ARGSUSED */ 1096static void 1097xtrskip(char *buf, long size) 1098{ 1099 1100 if (lseek(ofile, size, SEEK_CUR) == -1) { 1101 fprintf(stderr, 1102 "seek error extracting inode %d, name %s\nlseek: %s\n", 1103 curfile.ino, curfile.name, strerror(errno)); 1104 done(1); 1105 } 1106} 1107 1108/* 1109 * Collect the next block of a symbolic link. 1110 */ 1111static void 1112xtrlnkfile(char *buf, long size) 1113{ 1114 1115 pathlen += size; 1116 if (pathlen > MAXPATHLEN) { 1117 fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n", 1118 curfile.name, lnkbuf, buf, pathlen); 1119 done(1); 1120 } 1121 (void) strcat(lnkbuf, buf); 1122} 1123 1124/* 1125 * Skip over a hole in a symbolic link (should never happen). 1126 */ 1127/* ARGSUSED */ 1128static void 1129xtrlnkskip(char *buf, long size) 1130{ 1131 1132 fprintf(stderr, "unallocated block in symbolic link %s\n", 1133 curfile.name); 1134 done(1); 1135} 1136 1137/* 1138 * Collect the next block of a bit map. 1139 */ 1140static void 1141xtrmap(char *buf, long size) 1142{ 1143 1144 memmove(map, buf, size); 1145 map += size; 1146} 1147 1148/* 1149 * Skip over a hole in a bit map (should never happen). 1150 */ 1151/* ARGSUSED */ 1152static void 1153xtrmapskip(char *buf, long size) 1154{ 1155 1156 panic("hole in map\n"); 1157 map += size; 1158} 1159 1160/* 1161 * Noop, when an extraction function is not needed. 1162 */ 1163/* ARGSUSED */ 1164void 1165xtrnull(char *buf, long size) 1166{ 1167 1168 return; 1169} 1170 1171/* 1172 * Read TP_BSIZE blocks from the input. 1173 * Handle read errors, and end of media. 1174 */ 1175static void 1176readtape(char *buf) 1177{ 1178 long rd, newvol, i, oldnumtrec; 1179 int cnt, seek_failed; 1180 1181 if (blkcnt + (byteslide > 0) < numtrec) { 1182 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE) + byteslide], (long)TP_BSIZE); 1183 blksread++; 1184 tapeaddr++; 1185 return; 1186 } 1187 if (numtrec > 0) 1188 memmove(&tapebuf[-TP_BSIZE], 1189 &tapebuf[(numtrec-1) * TP_BSIZE], (long)TP_BSIZE); 1190 oldnumtrec = numtrec; 1191 for (i = 0; i < ntrec; i++) 1192 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; 1193 if (numtrec == 0) 1194 numtrec = ntrec; 1195 cnt = ntrec * TP_BSIZE; 1196 rd = 0; 1197getmore: 1198#ifdef RRESTORE 1199 if (host) 1200 i = rmtread(&tapebuf[rd], cnt); 1201 else 1202#endif 1203 i = read(mt, &tapebuf[rd], cnt); 1204 /* 1205 * Check for mid-tape short read error. 1206 * If found, skip rest of buffer and start with the next. 1207 */ 1208 if (!pipein && numtrec < ntrec && i > 0) { 1209 dprintf(stdout, "mid-media short read error.\n"); 1210 numtrec = ntrec; 1211 } 1212 /* 1213 * Handle partial block read. 1214 */ 1215 if (pipein && i == 0 && rd > 0) 1216 i = rd; 1217 else if (i > 0 && i != ntrec * TP_BSIZE) { 1218 if (pipein) { 1219 rd += i; 1220 cnt -= i; 1221 if (cnt > 0) 1222 goto getmore; 1223 i = rd; 1224 } else { 1225 /* 1226 * Short read. Process the blocks read. 1227 */ 1228 if (i % TP_BSIZE != 0) 1229 vprintf(stdout, 1230 "partial block read: %ld should be %ld\n", 1231 i, ntrec * TP_BSIZE); 1232 numtrec = i / TP_BSIZE; 1233 } 1234 } 1235 /* 1236 * Handle read error. 1237 */ 1238 if (i < 0) { 1239 fprintf(stderr, "Tape read error while "); 1240 switch (curfile.action) { 1241 default: 1242 fprintf(stderr, "trying to set up tape\n"); 1243 break; 1244 case UNKNOWN: 1245 fprintf(stderr, "trying to resynchronize\n"); 1246 break; 1247 case USING: 1248 fprintf(stderr, "restoring %s\n", curfile.name); 1249 break; 1250 case SKIP: 1251 fprintf(stderr, "skipping over inode %d\n", 1252 curfile.ino); 1253 break; 1254 } 1255 if (!yflag && !reply("continue")) 1256 done(1); 1257 i = ntrec * TP_BSIZE; 1258 memset(tapebuf, 0, i); 1259#ifdef RRESTORE 1260 if (host) 1261 seek_failed = (rmtseek(i, 1) < 0); 1262 else 1263#endif 1264 seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1); 1265 1266 if (seek_failed) { 1267 fprintf(stderr, 1268 "continuation failed: %s\n", strerror(errno)); 1269 done(1); 1270 } 1271 } 1272 /* 1273 * Handle end of tape. 1274 */ 1275 if (i == 0) { 1276 vprintf(stdout, "End-of-tape encountered\n"); 1277 if (!pipein) { 1278 newvol = volno + 1; 1279 volno = 0; 1280 numtrec = 0; 1281 getvol(newvol); 1282 readtape(buf); 1283 return; 1284 } 1285 if (rd % TP_BSIZE != 0) 1286 panic("partial block read: %ld should be %ld\n", 1287 rd, ntrec * TP_BSIZE); 1288 terminateinput(); 1289 memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE); 1290 } 1291 if (oldnumtrec == 0) 1292 blkcnt = 0; 1293 else 1294 blkcnt -= oldnumtrec; 1295 memmove(buf, 1296 &tapebuf[(blkcnt++ * TP_BSIZE) + byteslide], (long)TP_BSIZE); 1297 blksread++; 1298 tapeaddr++; 1299} 1300 1301static void 1302findtapeblksize(void) 1303{ 1304 long i; 1305 1306 for (i = 0; i < ntrec; i++) 1307 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; 1308 blkcnt = 0; 1309#ifdef RRESTORE 1310 if (host) 1311 i = rmtread(tapebuf, ntrec * TP_BSIZE); 1312 else 1313#endif 1314 i = read(mt, tapebuf, ntrec * TP_BSIZE); 1315 1316 if (i <= 0) { 1317 fprintf(stderr, "tape read error: %s\n", strerror(errno)); 1318 done(1); 1319 } 1320 if (i % TP_BSIZE != 0) { 1321 fprintf(stderr, "Tape block size (%ld) %s (%d)\n", 1322 i, "is not a multiple of dump block size", TP_BSIZE); 1323 done(1); 1324 } 1325 ntrec = i / TP_BSIZE; 1326 numtrec = ntrec; 1327 vprintf(stdout, "Tape block size is %ld\n", ntrec); 1328} 1329 1330void 1331closemt(void) 1332{ 1333 1334 if (mt < 0) 1335 return; 1336 if (pipecmdin) { 1337 pclose(popenfp); 1338 popenfp = NULL; 1339 } else 1340#ifdef RRESTORE 1341 if (host) 1342 rmtclose(); 1343 else 1344#endif 1345 (void) close(mt); 1346} 1347 1348/* 1349 * Read the next block from the tape. 1350 * If it is not any valid header, return an error. 1351 */ 1352static int 1353gethead(struct s_spcl *buf) 1354{ 1355 long i; 1356 1357 readtape((char *)buf); 1358 if (buf->c_magic != FS_UFS2_MAGIC && buf->c_magic != NFS_MAGIC) { 1359 if (buf->c_magic == OFS_MAGIC) { 1360 fprintf(stderr, 1361 "Format of dump tape is too old. Must use\n"); 1362 fprintf(stderr, 1363 "a version of restore from before 2002.\n"); 1364 return (FAIL); 1365 } 1366 if (swabl(buf->c_magic) != FS_UFS2_MAGIC && 1367 buf->c_magic != NFS_MAGIC) { 1368 if (buf->c_magic == OFS_MAGIC) { 1369 fprintf(stderr, 1370 "Format of dump tape is too old. Must use\n"); 1371 fprintf(stderr, 1372 "a version of restore from before 2002.\n"); 1373 } 1374 return (FAIL); 1375 } 1376 if (!Bcvt) { 1377 vprintf(stdout, "Note: Doing Byte swapping\n"); 1378 Bcvt = 1; 1379 } 1380 } 1381 if (checksum((int *)buf) == FAIL) 1382 return (FAIL); 1383 if (Bcvt) { 1384 swabst((u_char *)"8l4s1q8l2q17l", (u_char *)buf); 1385 swabst((u_char *)"l",(u_char *) &buf->c_level); 1386 swabst((u_char *)"2l4q",(u_char *) &buf->c_flags); 1387 } 1388 readmapflag = 0; 1389 1390 switch (buf->c_type) { 1391 1392 case TS_CLRI: 1393 case TS_BITS: 1394 /* 1395 * Have to patch up missing information in bit map headers 1396 */ 1397 buf->c_size = buf->c_count * TP_BSIZE; 1398 if (buf->c_count > TP_NINDIR) 1399 readmapflag = 1; 1400 else 1401 for (i = 0; i < buf->c_count; i++) 1402 buf->c_addr[i]++; 1403 /* FALL THROUGH */ 1404 1405 case TS_TAPE: 1406 if (buf->c_magic == NFS_MAGIC && 1407 (buf->c_flags & NFS_DR_NEWINODEFMT) == 0) 1408 oldinofmt = 1; 1409 /* FALL THROUGH */ 1410 1411 case TS_END: 1412 buf->c_inumber = 0; 1413 /* FALL THROUGH */ 1414 1415 case TS_ADDR: 1416 case TS_INODE: 1417 /* 1418 * For old dump tapes, have to copy up old fields to 1419 * new locations. 1420 */ 1421 if (buf->c_magic == NFS_MAGIC) { 1422 buf->c_tapea = buf->c_old_tapea; 1423 buf->c_firstrec = buf->c_old_firstrec; 1424 buf->c_date = _time32_to_time(buf->c_old_date); 1425 buf->c_ddate = _time32_to_time(buf->c_old_ddate); 1426 buf->c_atime = _time32_to_time(buf->c_old_atime); 1427 buf->c_mtime = _time32_to_time(buf->c_old_mtime); 1428 buf->c_birthtime = 0; 1429 buf->c_birthtimensec = 0; 1430 buf->c_extsize = 0; 1431 } 1432 break; 1433 1434 default: 1435 panic("gethead: unknown inode type %d\n", buf->c_type); 1436 break; 1437 } 1438 if (dumpdate != 0 && _time64_to_time(buf->c_date) != dumpdate) 1439 fprintf(stderr, "Header with wrong dumpdate.\n"); 1440 /* 1441 * If we're restoring a filesystem with the old (FreeBSD 1) 1442 * format inodes, copy the uid/gid to the new location 1443 */ 1444 if (oldinofmt) { 1445 buf->c_uid = buf->c_spare1[1]; 1446 buf->c_gid = buf->c_spare1[2]; 1447 } 1448 buf->c_magic = FS_UFS2_MAGIC; 1449 tapeaddr = buf->c_tapea; 1450 if (dflag) 1451 accthdr(buf); 1452 return(GOOD); 1453} 1454 1455/* 1456 * Check that a header is where it belongs and predict the next header 1457 */ 1458static void 1459accthdr(struct s_spcl *header) 1460{ 1461 static ino_t previno = 0x7fffffff; 1462 static int prevtype; 1463 static long predict; 1464 long blks, i; 1465 1466 if (header->c_type == TS_TAPE) { 1467 fprintf(stderr, "Volume header "); 1468 if (header->c_firstrec) 1469 fprintf(stderr, "begins with record %jd", 1470 (intmax_t)header->c_firstrec); 1471 fprintf(stderr, "\n"); 1472 previno = 0x7fffffff; 1473 return; 1474 } 1475 if (previno == 0x7fffffff) 1476 goto newcalc; 1477 switch (prevtype) { 1478 case TS_BITS: 1479 fprintf(stderr, "Dumped inodes map header"); 1480 break; 1481 case TS_CLRI: 1482 fprintf(stderr, "Used inodes map header"); 1483 break; 1484 case TS_INODE: 1485 fprintf(stderr, "File header, ino %d", previno); 1486 break; 1487 case TS_ADDR: 1488 fprintf(stderr, "File continuation header, ino %d", previno); 1489 break; 1490 case TS_END: 1491 fprintf(stderr, "End of tape header"); 1492 break; 1493 } 1494 if (predict != blksread - 1) 1495 fprintf(stderr, "; predicted %ld blocks, got %ld blocks", 1496 predict, blksread - 1); 1497 fprintf(stderr, "\n"); 1498newcalc: 1499 blks = 0; 1500 if (header->c_type != TS_END) 1501 for (i = 0; i < header->c_count; i++) 1502 if (readmapflag || header->c_addr[i] != 0) 1503 blks++; 1504 predict = blks; 1505 blksread = 0; 1506 prevtype = header->c_type; 1507 previno = header->c_inumber; 1508} 1509 1510/* 1511 * Find an inode header. 1512 * Complain if had to skip. 1513 */ 1514static void 1515findinode(struct s_spcl *header) 1516{ 1517 static long skipcnt = 0; 1518 long i; 1519 char buf[TP_BSIZE]; 1520 int htype; 1521 1522 curfile.name = "<name unknown>"; 1523 curfile.action = UNKNOWN; 1524 curfile.mode = 0; 1525 curfile.ino = 0; 1526 do { 1527 htype = header->c_type; 1528 switch (htype) { 1529 1530 case TS_ADDR: 1531 /* 1532 * Skip up to the beginning of the next record 1533 */ 1534 for (i = 0; i < header->c_count; i++) 1535 if (header->c_addr[i]) 1536 readtape(buf); 1537 while (gethead(header) == FAIL || 1538 _time64_to_time(header->c_date) != dumpdate) { 1539 skipcnt++; 1540 if (Dflag) { 1541 byteslide++; 1542 if (byteslide < TP_BSIZE) { 1543 blkcnt--; 1544 blksread--; 1545 } else 1546 byteslide = 0; 1547 } 1548 } 1549 break; 1550 1551 case TS_INODE: 1552 curfile.mode = header->c_mode; 1553 curfile.uid = header->c_uid; 1554 curfile.gid = header->c_gid; 1555 curfile.file_flags = header->c_file_flags; 1556 curfile.rdev = header->c_rdev; 1557 curfile.atime_sec = header->c_atime; 1558 curfile.atime_nsec = header->c_atimensec; 1559 curfile.mtime_sec = header->c_mtime; 1560 curfile.mtime_nsec = header->c_mtimensec; 1561 curfile.birthtime_sec = header->c_birthtime; 1562 curfile.birthtime_nsec = header->c_birthtimensec; 1563 curfile.extsize = header->c_extsize; 1564 curfile.size = header->c_size; 1565 curfile.ino = header->c_inumber; 1566 break; 1567 1568 case TS_END: 1569 /* If we missed some tapes, get another volume. */ 1570 if (tapesread & (tapesread + 1)) { 1571 getvol(0); 1572 continue; 1573 } 1574 curfile.ino = maxino; 1575 break; 1576 1577 case TS_CLRI: 1578 curfile.name = "<file removal list>"; 1579 break; 1580 1581 case TS_BITS: 1582 curfile.name = "<file dump list>"; 1583 break; 1584 1585 case TS_TAPE: 1586 if (Dflag) 1587 fprintf(stderr, "unexpected tape header\n"); 1588 else 1589 panic("unexpected tape header\n"); 1590 1591 default: 1592 if (Dflag) 1593 fprintf(stderr, "unknown tape header type %d\n", 1594 spcl.c_type); 1595 else 1596 panic("unknown tape header type %d\n", 1597 spcl.c_type); 1598 while (gethead(header) == FAIL || 1599 _time64_to_time(header->c_date) != dumpdate) { 1600 skipcnt++; 1601 if (Dflag) { 1602 byteslide++; 1603 if (byteslide < TP_BSIZE) { 1604 blkcnt--; 1605 blksread--; 1606 } else 1607 byteslide = 0; 1608 } 1609 } 1610 1611 } 1612 } while (htype == TS_ADDR); 1613 if (skipcnt > 0) 1614 fprintf(stderr, "resync restore, skipped %ld %s\n", 1615 skipcnt, Dflag ? "bytes" : "blocks"); 1616 skipcnt = 0; 1617} 1618 1619static int 1620checksum(int *buf) 1621{ 1622 int i, j; 1623 1624 j = sizeof(union u_spcl) / sizeof(int); 1625 i = 0; 1626 if (!Bcvt) { 1627 do 1628 i += *buf++; 1629 while (--j); 1630 } else { 1631 /* What happens if we want to read restore tapes 1632 for a 16bit int machine??? */ 1633 do 1634 i += swabl(*buf++); 1635 while (--j); 1636 } 1637 1638 if (i != CHECKSUM) { 1639 fprintf(stderr, "Checksum error %o, inode %d file %s\n", i, 1640 curfile.ino, curfile.name); 1641 return(FAIL); 1642 } 1643 return(GOOD); 1644} 1645 1646#ifdef RRESTORE 1647#include <stdarg.h> 1648 1649void 1650msg(const char *fmt, ...) 1651{ 1652 va_list ap; 1653 va_start(ap, fmt); 1654 (void)vfprintf(stderr, fmt, ap); 1655 va_end(ap); 1656} 1657#endif /* RRESTORE */ 1658 1659static u_char * 1660swabshort(u_char *sp, int n) 1661{ 1662 char c; 1663 1664 while (--n >= 0) { 1665 c = sp[0]; sp[0] = sp[1]; sp[1] = c; 1666 sp += 2; 1667 } 1668 return (sp); 1669} 1670 1671static u_char * 1672swablong(u_char *sp, int n) 1673{ 1674 char c; 1675 1676 while (--n >= 0) { 1677 c = sp[0]; sp[0] = sp[3]; sp[3] = c; 1678 c = sp[2]; sp[2] = sp[1]; sp[1] = c; 1679 sp += 4; 1680 } 1681 return (sp); 1682} 1683 1684static u_char * 1685swabquad(u_char *sp, int n) 1686{ 1687 char c; 1688 1689 while (--n >= 0) { 1690 c = sp[0]; sp[0] = sp[7]; sp[7] = c; 1691 c = sp[1]; sp[1] = sp[6]; sp[6] = c; 1692 c = sp[2]; sp[2] = sp[5]; sp[5] = c; 1693 c = sp[3]; sp[3] = sp[4]; sp[4] = c; 1694 sp += 8; 1695 } 1696 return (sp); 1697} 1698 1699void 1700swabst(u_char *cp, u_char *sp) 1701{ 1702 int n = 0; 1703 1704 while (*cp) { 1705 switch (*cp) { 1706 case '0': case '1': case '2': case '3': case '4': 1707 case '5': case '6': case '7': case '8': case '9': 1708 n = (n * 10) + (*cp++ - '0'); 1709 continue; 1710 1711 case 's': case 'w': case 'h': 1712 if (n == 0) 1713 n = 1; 1714 sp = swabshort(sp, n); 1715 break; 1716 1717 case 'l': 1718 if (n == 0) 1719 n = 1; 1720 sp = swablong(sp, n); 1721 break; 1722 1723 case 'q': 1724 if (n == 0) 1725 n = 1; 1726 sp = swabquad(sp, n); 1727 break; 1728 1729 case 'b': 1730 if (n == 0) 1731 n = 1; 1732 sp += n; 1733 break; 1734 1735 default: 1736 fprintf(stderr, "Unknown conversion character: %c\n", 1737 *cp); 1738 done(0); 1739 break; 1740 } 1741 cp++; 1742 n = 0; 1743 } 1744} 1745 1746static u_long 1747swabl(u_long x) 1748{ 1749 swabst((u_char *)"l", (u_char *)&x); 1750 return (x); 1751} 1752