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