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