| 1 | /* |
| 2 | * Copyright (c) 1983, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * (c) UNIX System Laboratories, Inc. |
| 5 | * All or some portions of this file are derived from material licensed |
| 6 | * to the University of California by American Telephone and Telegraph |
| 7 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
| 8 | * the permission of UNIX System Laboratories, Inc. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. All advertising materials mentioning features or use of this software |
| 19 | * must display the following acknowledgement: |
| 20 | * This product includes software developed by the University of |
| 21 | * California, Berkeley and its contributors. |
| 22 | * 4. Neither the name of the University nor the names of its contributors |
| 23 | * may be used to endorse or promote products derived from this software |
| 24 | * without specific prior written permission. |
| 25 | * |
| 26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 36 | * SUCH DAMAGE. |
| 37 | * |
| 38 | * @(#)tape.c 8.9 (Berkeley) 5/1/95 |
| 39 | * $FreeBSD: src/sbin/restore/tape.c,v 1.16.2.8 2002/06/30 22:57:52 iedowse Exp $ |
| 40 | * $DragonFly: src/sbin/restore/tape.c,v 1.7 2004/12/18 21:43:40 swildner Exp $ |
| 41 | */ |
| 42 | |
| 43 | #include <sys/param.h> |
| 44 | #include <sys/file.h> |
| 45 | #include <sys/mtio.h> |
| 46 | #include <sys/stat.h> |
| 47 | #include <sys/time.h> |
| 48 | |
| 49 | #include <vfs/ufs/dinode.h> |
| 50 | #include <protocols/dumprestore.h> |
| 51 | |
| 52 | #include <errno.h> |
| 53 | #include <paths.h> |
| 54 | #include <setjmp.h> |
| 55 | #include <stdio.h> |
| 56 | #include <stdlib.h> |
| 57 | #include <string.h> |
| 58 | #include <time.h> |
| 59 | #include <unistd.h> |
| 60 | |
| 61 | #include "restore.h" |
| 62 | #include "extern.h" |
| 63 | |
| 64 | static long fssize = MAXBSIZE; |
| 65 | static int mt = -1; |
| 66 | static int pipein = 0; |
| 67 | static char *magtape; |
| 68 | static int blkcnt; |
| 69 | static int numtrec; |
| 70 | static char *tapebuf; |
| 71 | static union u_spcl endoftapemark; |
| 72 | static long blksread; /* blocks read since last header */ |
| 73 | static long tapeaddr = 0; /* current TP_BSIZE tape record */ |
| 74 | static long tapesread; |
| 75 | static jmp_buf restart; |
| 76 | static int gettingfile = 0; /* restart has a valid frame */ |
| 77 | static char *host = NULL; |
| 78 | |
| 79 | static int ofile; |
| 80 | static char *map; |
| 81 | static char lnkbuf[MAXPATHLEN + 1]; |
| 82 | static int pathlen; |
| 83 | |
| 84 | int oldinofmt; /* old inode format conversion required */ |
| 85 | int Bcvt; /* Swap Bytes (for CCI or sun) */ |
| 86 | static int Qcvt; /* Swap quads (for sun) */ |
| 87 | |
| 88 | #define FLUSHTAPEBUF() blkcnt = ntrec + 1 |
| 89 | |
| 90 | static void accthdr(struct s_spcl *); |
| 91 | static int checksum(int *); |
| 92 | static void findinode(struct s_spcl *); |
| 93 | static void findtapeblksize(void); |
| 94 | static int gethead(struct s_spcl *); |
| 95 | static void readtape(char *); |
| 96 | static void setdumpnum(void); |
| 97 | static u_long swabl(u_long); |
| 98 | static u_char *swablong(u_char *, int); |
| 99 | static u_char *swabshort(u_char *, int); |
| 100 | static void terminateinput(void); |
| 101 | static void xtrfile(char *, long); |
| 102 | static void xtrlnkfile(char *, long); |
| 103 | static void xtrlnkskip(char *, long); |
| 104 | static void xtrmap(char *, long); |
| 105 | static void xtrmapskip(char *, long); |
| 106 | static void xtrskip(char *, long); |
| 107 | |
| 108 | static int readmapflag; |
| 109 | |
| 110 | /* |
| 111 | * Set up an input source |
| 112 | */ |
| 113 | void |
| 114 | setinput(char *source) |
| 115 | { |
| 116 | FLUSHTAPEBUF(); |
| 117 | if (bflag) |
| 118 | newtapebuf(ntrec); |
| 119 | else |
| 120 | newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC); |
| 121 | terminal = stdin; |
| 122 | |
| 123 | #ifdef RRESTORE |
| 124 | if (strchr(source, ':')) { |
| 125 | host = source; |
| 126 | source = strchr(host, ':'); |
| 127 | *source++ = '\0'; |
| 128 | if (rmthost(host) == 0) |
| 129 | done(1); |
| 130 | } else |
| 131 | #endif |
| 132 | if (strcmp(source, "-") == 0) { |
| 133 | /* |
| 134 | * Since input is coming from a pipe we must establish |
| 135 | * our own connection to the terminal. |
| 136 | */ |
| 137 | terminal = fopen(_PATH_TTY, "r"); |
| 138 | if (terminal == NULL) { |
| 139 | fprintf(stderr, "cannot open %s: %s\n", |
| 140 | _PATH_TTY, strerror(errno)); |
| 141 | terminal = fopen(_PATH_DEVNULL, "r"); |
| 142 | if (terminal == NULL) { |
| 143 | fprintf(stderr, "cannot open %s: %s\n", |
| 144 | _PATH_DEVNULL, strerror(errno)); |
| 145 | done(1); |
| 146 | } |
| 147 | } |
| 148 | pipein++; |
| 149 | } |
| 150 | setuid(getuid()); /* no longer need or want root privileges */ |
| 151 | magtape = strdup(source); |
| 152 | if (magtape == NULL) { |
| 153 | fprintf(stderr, "Cannot allocate space for magtape buffer\n"); |
| 154 | done(1); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | void |
| 159 | newtapebuf(long size) |
| 160 | { |
| 161 | static long tapebufsize = -1; |
| 162 | |
| 163 | ntrec = size; |
| 164 | if (size <= tapebufsize) |
| 165 | return; |
| 166 | if (tapebuf != NULL) |
| 167 | free(tapebuf); |
| 168 | tapebuf = malloc(size * TP_BSIZE); |
| 169 | if (tapebuf == NULL) { |
| 170 | fprintf(stderr, "Cannot allocate space for tape buffer\n"); |
| 171 | done(1); |
| 172 | } |
| 173 | tapebufsize = size; |
| 174 | } |
| 175 | |
| 176 | /* |
| 177 | * Verify that the tape drive can be accessed and |
| 178 | * that it actually is a dump tape. |
| 179 | */ |
| 180 | void |
| 181 | setup(void) |
| 182 | { |
| 183 | int i, j, *ip; |
| 184 | struct stat stbuf; |
| 185 | |
| 186 | vprintf(stdout, "Verify tape and initialize maps\n"); |
| 187 | #ifdef RRESTORE |
| 188 | if (host) |
| 189 | mt = rmtopen(magtape, 0); |
| 190 | else |
| 191 | #endif |
| 192 | if (pipein) |
| 193 | mt = 0; |
| 194 | else |
| 195 | mt = open(magtape, O_RDONLY, 0); |
| 196 | if (mt < 0) { |
| 197 | fprintf(stderr, "%s: %s\n", magtape, strerror(errno)); |
| 198 | done(1); |
| 199 | } |
| 200 | volno = 1; |
| 201 | setdumpnum(); |
| 202 | FLUSHTAPEBUF(); |
| 203 | if (!pipein && !bflag) |
| 204 | findtapeblksize(); |
| 205 | if (gethead(&spcl) == FAIL) { |
| 206 | blkcnt--; /* push back this block */ |
| 207 | blksread--; |
| 208 | cvtflag++; |
| 209 | if (gethead(&spcl) == FAIL) { |
| 210 | fprintf(stderr, "Tape is not a dump tape\n"); |
| 211 | done(1); |
| 212 | } |
| 213 | fprintf(stderr, "Converting to new file system format.\n"); |
| 214 | } |
| 215 | if (pipein) { |
| 216 | endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC; |
| 217 | endoftapemark.s_spcl.c_type = TS_END; |
| 218 | ip = (int *)&endoftapemark; |
| 219 | j = sizeof(union u_spcl) / sizeof(int); |
| 220 | i = 0; |
| 221 | do |
| 222 | i += *ip++; |
| 223 | while (--j); |
| 224 | endoftapemark.s_spcl.c_checksum = CHECKSUM - i; |
| 225 | } |
| 226 | if (vflag || command == 't') |
| 227 | printdumpinfo(); |
| 228 | dumptime = spcl.c_ddate; |
| 229 | dumpdate = spcl.c_date; |
| 230 | if (stat(".", &stbuf) < 0) { |
| 231 | fprintf(stderr, "cannot stat .: %s\n", strerror(errno)); |
| 232 | done(1); |
| 233 | } |
| 234 | if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE ) |
| 235 | fssize = TP_BSIZE; |
| 236 | if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE) |
| 237 | fssize = stbuf.st_blksize; |
| 238 | if (((fssize - 1) & fssize) != 0) { |
| 239 | fprintf(stderr, "bad block size %ld\n", fssize); |
| 240 | done(1); |
| 241 | } |
| 242 | if (spcl.c_volume != 1) { |
| 243 | fprintf(stderr, "Tape is not volume 1 of the dump\n"); |
| 244 | done(1); |
| 245 | } |
| 246 | if (gethead(&spcl) == FAIL) { |
| 247 | dprintf(stdout, "header read failed at %ld blocks\n", blksread); |
| 248 | panic("no header after volume mark!\n"); |
| 249 | } |
| 250 | findinode(&spcl); |
| 251 | if (spcl.c_type != TS_CLRI) { |
| 252 | fprintf(stderr, "Cannot find file removal list\n"); |
| 253 | done(1); |
| 254 | } |
| 255 | maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1; |
| 256 | dprintf(stdout, "maxino = %d\n", maxino); |
| 257 | map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY)); |
| 258 | if (map == NULL) |
| 259 | panic("no memory for active inode map\n"); |
| 260 | usedinomap = map; |
| 261 | curfile.action = USING; |
| 262 | getfile(xtrmap, xtrmapskip); |
| 263 | if (spcl.c_type != TS_BITS) { |
| 264 | fprintf(stderr, "Cannot find file dump list\n"); |
| 265 | done(1); |
| 266 | } |
| 267 | map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY)); |
| 268 | if (map == (char *)NULL) |
| 269 | panic("no memory for file dump list\n"); |
| 270 | dumpmap = map; |
| 271 | curfile.action = USING; |
| 272 | getfile(xtrmap, xtrmapskip); |
| 273 | /* |
| 274 | * If there may be whiteout entries on the tape, pretend that the |
| 275 | * whiteout inode exists, so that the whiteout entries can be |
| 276 | * extracted. |
| 277 | */ |
| 278 | if (oldinofmt == 0) |
| 279 | SETINO(WINO, dumpmap); |
| 280 | /* 'r' restores don't call getvol() for tape 1, so mark it as read. */ |
| 281 | if (command == 'r') |
| 282 | tapesread = 1; |
| 283 | } |
| 284 | |
| 285 | /* |
| 286 | * Prompt user to load a new dump volume. |
| 287 | * "Nextvol" is the next suggested volume to use. |
| 288 | * This suggested volume is enforced when doing full |
| 289 | * or incremental restores, but can be overridden by |
| 290 | * the user when only extracting a subset of the files. |
| 291 | */ |
| 292 | void |
| 293 | getvol(long nextvol) |
| 294 | { |
| 295 | long newvol = 0, prevtapea, savecnt, i; |
| 296 | union u_spcl tmpspcl; |
| 297 | # define tmpbuf tmpspcl.s_spcl |
| 298 | char buf[TP_BSIZE]; |
| 299 | |
| 300 | if (nextvol == 1) { |
| 301 | tapesread = 0; |
| 302 | gettingfile = 0; |
| 303 | } |
| 304 | prevtapea = tapeaddr; |
| 305 | savecnt = blksread; |
| 306 | if (pipein) { |
| 307 | if (nextvol != 1) { |
| 308 | panic("Changing volumes on pipe input?\n"); |
| 309 | /* Avoid looping if we couldn't ask the user. */ |
| 310 | if (yflag || ferror(terminal) || feof(terminal)) |
| 311 | done(1); |
| 312 | } |
| 313 | if (volno == 1) |
| 314 | return; |
| 315 | goto gethdr; |
| 316 | } |
| 317 | again: |
| 318 | if (pipein) |
| 319 | done(1); /* pipes do not get a second chance */ |
| 320 | if (command == 'R' || command == 'r' || curfile.action != SKIP) |
| 321 | newvol = nextvol; |
| 322 | else |
| 323 | newvol = 0; |
| 324 | while (newvol <= 0) { |
| 325 | if (tapesread == 0) { |
| 326 | fprintf(stderr, "%s%s%s%s%s%s%s", |
| 327 | "You have not read any tapes yet.\n", |
| 328 | "If you are extracting just a few files,", |
| 329 | " start with the last volume\n", |
| 330 | "and work towards the first; restore", |
| 331 | " can quickly skip tapes that\n", |
| 332 | "have no further files to extract.", |
| 333 | " Otherwise, begin with volume 1.\n"); |
| 334 | } else { |
| 335 | fprintf(stderr, "You have read volumes"); |
| 336 | strcpy(buf, ": "); |
| 337 | for (i = 0; i < 32; i++) |
| 338 | if (tapesread & (1 << i)) { |
| 339 | fprintf(stderr, "%s%ld", buf, i + 1); |
| 340 | strcpy(buf, ", "); |
| 341 | } |
| 342 | fprintf(stderr, "\n"); |
| 343 | } |
| 344 | do { |
| 345 | fprintf(stderr, "Specify next volume #: "); |
| 346 | fflush(stderr); |
| 347 | if (fgets(buf, BUFSIZ, terminal) == NULL) |
| 348 | done(1); |
| 349 | } while (buf[0] == '\n'); |
| 350 | newvol = atoi(buf); |
| 351 | if (newvol <= 0) { |
| 352 | fprintf(stderr, |
| 353 | "Volume numbers are positive numerics\n"); |
| 354 | } |
| 355 | } |
| 356 | if (newvol == volno) { |
| 357 | tapesread |= 1 << (volno - 1); |
| 358 | return; |
| 359 | } |
| 360 | closemt(); |
| 361 | fprintf(stderr, "Mount tape volume %ld\n", newvol); |
| 362 | fprintf(stderr, "Enter ``none'' if there are no more tapes\n"); |
| 363 | fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape); |
| 364 | fflush(stderr); |
| 365 | if (fgets(buf, BUFSIZ, terminal) == NULL) |
| 366 | done(1); |
| 367 | if (!strcmp(buf, "none\n")) { |
| 368 | terminateinput(); |
| 369 | return; |
| 370 | } |
| 371 | if (buf[0] != '\n') { |
| 372 | strcpy(magtape, buf); |
| 373 | magtape[strlen(magtape) - 1] = '\0'; |
| 374 | } |
| 375 | #ifdef RRESTORE |
| 376 | if (host) |
| 377 | mt = rmtopen(magtape, 0); |
| 378 | else |
| 379 | #endif |
| 380 | mt = open(magtape, O_RDONLY, 0); |
| 381 | |
| 382 | if (mt == -1) { |
| 383 | fprintf(stderr, "Cannot open %s\n", magtape); |
| 384 | volno = -1; |
| 385 | goto again; |
| 386 | } |
| 387 | gethdr: |
| 388 | volno = newvol; |
| 389 | setdumpnum(); |
| 390 | FLUSHTAPEBUF(); |
| 391 | if (gethead(&tmpbuf) == FAIL) { |
| 392 | dprintf(stdout, "header read failed at %ld blocks\n", blksread); |
| 393 | fprintf(stderr, "tape is not dump tape\n"); |
| 394 | volno = 0; |
| 395 | goto again; |
| 396 | } |
| 397 | if (tmpbuf.c_volume != volno) { |
| 398 | fprintf(stderr, "Wrong volume (%ld)\n", (long)tmpbuf.c_volume); |
| 399 | volno = 0; |
| 400 | goto again; |
| 401 | } |
| 402 | if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) { |
| 403 | fprintf(stderr, "Wrong dump date\n\tgot: %s", |
| 404 | ctime(&tmpbuf.c_date)); |
| 405 | fprintf(stderr, "\twanted: %s", ctime(&dumpdate)); |
| 406 | volno = 0; |
| 407 | goto again; |
| 408 | } |
| 409 | tapesread |= 1 << (volno - 1); |
| 410 | blksread = savecnt; |
| 411 | /* |
| 412 | * If continuing from the previous volume, skip over any |
| 413 | * blocks read already at the end of the previous volume. |
| 414 | * |
| 415 | * If coming to this volume at random, skip to the beginning |
| 416 | * of the next record. |
| 417 | */ |
| 418 | dprintf(stdout, "last rec %ld, tape starts with %ld\n", prevtapea, |
| 419 | (long)tmpbuf.c_tapea); |
| 420 | if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) { |
| 421 | if (curfile.action != USING) { |
| 422 | /* |
| 423 | * XXX Dump incorrectly sets c_count to 1 in the |
| 424 | * volume header of the first tape, so ignore |
| 425 | * c_count when volno == 1. |
| 426 | */ |
| 427 | if (volno != 1) |
| 428 | for (i = tmpbuf.c_count; i > 0; i--) |
| 429 | readtape(buf); |
| 430 | } else if (tmpbuf.c_tapea <= prevtapea) { |
| 431 | /* |
| 432 | * Normally the value of c_tapea in the volume |
| 433 | * header is the record number of the header itself. |
| 434 | * However in the volume header following an EOT- |
| 435 | * terminated tape, it is the record number of the |
| 436 | * first continuation data block (dump bug?). |
| 437 | * |
| 438 | * The next record we want is `prevtapea + 1'. |
| 439 | */ |
| 440 | i = prevtapea + 1 - tmpbuf.c_tapea; |
| 441 | dprintf(stderr, "Skipping %ld duplicate record%s.\n", |
| 442 | i, i > 1 ? "s" : ""); |
| 443 | while (--i >= 0) |
| 444 | readtape(buf); |
| 445 | } |
| 446 | } |
| 447 | if (curfile.action == USING) { |
| 448 | if (volno == 1) |
| 449 | panic("active file into volume 1\n"); |
| 450 | return; |
| 451 | } |
| 452 | gethead(&spcl); |
| 453 | findinode(&spcl); |
| 454 | if (gettingfile) { |
| 455 | gettingfile = 0; |
| 456 | longjmp(restart, 1); |
| 457 | } |
| 458 | } |
| 459 | |
| 460 | /* |
| 461 | * Handle unexpected EOF. |
| 462 | */ |
| 463 | static void |
| 464 | terminateinput(void) |
| 465 | { |
| 466 | |
| 467 | if (gettingfile && curfile.action == USING) { |
| 468 | printf("Warning: %s %s\n", |
| 469 | "End-of-input encountered while extracting", curfile.name); |
| 470 | } |
| 471 | curfile.name = "<name unknown>"; |
| 472 | curfile.action = UNKNOWN; |
| 473 | curfile.dip = NULL; |
| 474 | curfile.ino = maxino; |
| 475 | if (gettingfile) { |
| 476 | gettingfile = 0; |
| 477 | longjmp(restart, 1); |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | /* |
| 482 | * handle multiple dumps per tape by skipping forward to the |
| 483 | * appropriate one. |
| 484 | */ |
| 485 | static void |
| 486 | setdumpnum(void) |
| 487 | { |
| 488 | struct mtop tcom; |
| 489 | |
| 490 | if (dumpnum == 1 || volno != 1) |
| 491 | return; |
| 492 | if (pipein) { |
| 493 | fprintf(stderr, "Cannot have multiple dumps on pipe input\n"); |
| 494 | done(1); |
| 495 | } |
| 496 | tcom.mt_op = MTFSF; |
| 497 | tcom.mt_count = dumpnum - 1; |
| 498 | #ifdef RRESTORE |
| 499 | if (host) |
| 500 | rmtioctl(MTFSF, dumpnum - 1); |
| 501 | else |
| 502 | #endif |
| 503 | if (ioctl(mt, MTIOCTOP, (char *)&tcom) < 0) |
| 504 | fprintf(stderr, "ioctl MTFSF: %s\n", strerror(errno)); |
| 505 | } |
| 506 | |
| 507 | void |
| 508 | printdumpinfo(void) |
| 509 | { |
| 510 | fprintf(stdout, "Dump date: %s", ctime(&spcl.c_date)); |
| 511 | fprintf(stdout, "Dumped from: %s", |
| 512 | (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&spcl.c_ddate)); |
| 513 | if (spcl.c_host[0] == '\0') |
| 514 | return; |
| 515 | fprintf(stderr, "Level %ld dump of %s on %s:%s\n", |
| 516 | (long)spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev); |
| 517 | fprintf(stderr, "Label: %s\n", spcl.c_label); |
| 518 | } |
| 519 | |
| 520 | int |
| 521 | extractfile(char *name) |
| 522 | { |
| 523 | int flags; |
| 524 | uid_t uid; |
| 525 | gid_t gid; |
| 526 | mode_t mode; |
| 527 | struct timeval timep[2]; |
| 528 | struct entry *ep; |
| 529 | |
| 530 | curfile.name = name; |
| 531 | curfile.action = USING; |
| 532 | timep[0].tv_sec = curfile.dip->di_atime; |
| 533 | timep[0].tv_usec = curfile.dip->di_atimensec / 1000; |
| 534 | timep[1].tv_sec = curfile.dip->di_mtime; |
| 535 | timep[1].tv_usec = curfile.dip->di_mtimensec / 1000; |
| 536 | uid = curfile.dip->di_uid; |
| 537 | gid = curfile.dip->di_gid; |
| 538 | mode = curfile.dip->di_mode; |
| 539 | flags = curfile.dip->di_flags; |
| 540 | switch (mode & IFMT) { |
| 541 | |
| 542 | default: |
| 543 | fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode); |
| 544 | skipfile(); |
| 545 | return (FAIL); |
| 546 | |
| 547 | case IFSOCK: |
| 548 | vprintf(stdout, "skipped socket %s\n", name); |
| 549 | skipfile(); |
| 550 | return (GOOD); |
| 551 | |
| 552 | case IFDIR: |
| 553 | if (mflag) { |
| 554 | ep = lookupname(name); |
| 555 | if (ep == NULL || ep->e_flags & EXTRACT) |
| 556 | panic("unextracted directory %s\n", name); |
| 557 | skipfile(); |
| 558 | return (GOOD); |
| 559 | } |
| 560 | vprintf(stdout, "extract file %s\n", name); |
| 561 | return (genliteraldir(name, curfile.ino)); |
| 562 | |
| 563 | case IFLNK: |
| 564 | lnkbuf[0] = '\0'; |
| 565 | pathlen = 0; |
| 566 | getfile(xtrlnkfile, xtrlnkskip); |
| 567 | if (pathlen == 0) { |
| 568 | vprintf(stdout, |
| 569 | "%s: zero length symbolic link (ignored)\n", name); |
| 570 | return (GOOD); |
| 571 | } |
| 572 | if (linkit(lnkbuf, name, SYMLINK) == GOOD) { |
| 573 | lchown(name, uid, gid); |
| 574 | lchmod(name, mode); |
| 575 | lutimes(name, timep); |
| 576 | return (GOOD); |
| 577 | } |
| 578 | return (FAIL); |
| 579 | |
| 580 | case IFIFO: |
| 581 | vprintf(stdout, "extract fifo %s\n", name); |
| 582 | if (Nflag) { |
| 583 | skipfile(); |
| 584 | return (GOOD); |
| 585 | } |
| 586 | if (uflag && !Nflag) |
| 587 | unlink(name); |
| 588 | if (mkfifo(name, mode) < 0) { |
| 589 | fprintf(stderr, "%s: cannot create fifo: %s\n", |
| 590 | name, strerror(errno)); |
| 591 | skipfile(); |
| 592 | return (FAIL); |
| 593 | } |
| 594 | chown(name, uid, gid); |
| 595 | chmod(name, mode); |
| 596 | utimes(name, timep); |
| 597 | chflags(name, flags); |
| 598 | skipfile(); |
| 599 | return (GOOD); |
| 600 | |
| 601 | case IFCHR: |
| 602 | case IFBLK: |
| 603 | vprintf(stdout, "extract special file %s\n", name); |
| 604 | if (Nflag) { |
| 605 | skipfile(); |
| 606 | return (GOOD); |
| 607 | } |
| 608 | if (uflag) |
| 609 | unlink(name); |
| 610 | if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) { |
| 611 | fprintf(stderr, "%s: cannot create special file: %s\n", |
| 612 | name, strerror(errno)); |
| 613 | skipfile(); |
| 614 | return (FAIL); |
| 615 | } |
| 616 | chown(name, uid, gid); |
| 617 | chmod(name, mode); |
| 618 | utimes(name, timep); |
| 619 | chflags(name, flags); |
| 620 | skipfile(); |
| 621 | return (GOOD); |
| 622 | |
| 623 | case IFREG: |
| 624 | vprintf(stdout, "extract file %s\n", name); |
| 625 | if (Nflag) { |
| 626 | skipfile(); |
| 627 | return (GOOD); |
| 628 | } |
| 629 | if (uflag) |
| 630 | unlink(name); |
| 631 | if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, |
| 632 | 0666)) < 0) { |
| 633 | fprintf(stderr, "%s: cannot create file: %s\n", |
| 634 | name, strerror(errno)); |
| 635 | skipfile(); |
| 636 | return (FAIL); |
| 637 | } |
| 638 | fchown(ofile, uid, gid); |
| 639 | fchmod(ofile, mode); |
| 640 | getfile(xtrfile, xtrskip); |
| 641 | close(ofile); |
| 642 | utimes(name, timep); |
| 643 | chflags(name, flags); |
| 644 | return (GOOD); |
| 645 | } |
| 646 | /* NOTREACHED */ |
| 647 | } |
| 648 | |
| 649 | /* |
| 650 | * skip over bit maps on the tape |
| 651 | */ |
| 652 | void |
| 653 | skipmaps(void) |
| 654 | { |
| 655 | |
| 656 | while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI) |
| 657 | skipfile(); |
| 658 | } |
| 659 | |
| 660 | /* |
| 661 | * skip over a file on the tape |
| 662 | */ |
| 663 | void |
| 664 | skipfile(void) |
| 665 | { |
| 666 | |
| 667 | curfile.action = SKIP; |
| 668 | getfile(xtrnull, xtrnull); |
| 669 | } |
| 670 | |
| 671 | /* |
| 672 | * Extract a file from the tape. |
| 673 | * When an allocated block is found it is passed to the fill function; |
| 674 | * when an unallocated block (hole) is found, a zeroed buffer is passed |
| 675 | * to the skip function. |
| 676 | */ |
| 677 | void |
| 678 | getfile(void (*fill) (char *, long), void (*skip) (char *, long)) |
| 679 | { |
| 680 | register int i; |
| 681 | int curblk = 0; |
| 682 | quad_t size = spcl.c_dinode.di_size; |
| 683 | static char clearedbuf[MAXBSIZE]; |
| 684 | char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE]; |
| 685 | char junk[TP_BSIZE]; |
| 686 | |
| 687 | if (spcl.c_type == TS_END) |
| 688 | panic("ran off end of tape\n"); |
| 689 | if (spcl.c_magic != NFS_MAGIC) |
| 690 | panic("not at beginning of a file\n"); |
| 691 | if (!gettingfile && setjmp(restart) != 0) |
| 692 | return; |
| 693 | gettingfile++; |
| 694 | loop: |
| 695 | for (i = 0; i < spcl.c_count; i++) { |
| 696 | if (readmapflag || spcl.c_addr[i]) { |
| 697 | readtape(&buf[curblk++][0]); |
| 698 | if (curblk == fssize / TP_BSIZE) { |
| 699 | (*fill)((char *)buf, (long)(size > TP_BSIZE ? |
| 700 | fssize : (curblk - 1) * TP_BSIZE + size)); |
| 701 | curblk = 0; |
| 702 | } |
| 703 | } else { |
| 704 | if (curblk > 0) { |
| 705 | (*fill)((char *)buf, (long)(size > TP_BSIZE ? |
| 706 | curblk * TP_BSIZE : |
| 707 | (curblk - 1) * TP_BSIZE + size)); |
| 708 | curblk = 0; |
| 709 | } |
| 710 | (*skip)(clearedbuf, (long)(size > TP_BSIZE ? |
| 711 | TP_BSIZE : size)); |
| 712 | } |
| 713 | if ((size -= TP_BSIZE) <= 0) { |
| 714 | for (i++; i < spcl.c_count; i++) |
| 715 | if (readmapflag || spcl.c_addr[i]) |
| 716 | readtape(junk); |
| 717 | break; |
| 718 | } |
| 719 | } |
| 720 | if (gethead(&spcl) == GOOD && size > 0) { |
| 721 | if (spcl.c_type == TS_ADDR) |
| 722 | goto loop; |
| 723 | dprintf(stdout, |
| 724 | "Missing address (header) block for %s at %ld blocks\n", |
| 725 | curfile.name, blksread); |
| 726 | } |
| 727 | if (curblk > 0) |
| 728 | (*fill)((char *)buf, (long)((curblk * TP_BSIZE) + size)); |
| 729 | findinode(&spcl); |
| 730 | gettingfile = 0; |
| 731 | } |
| 732 | |
| 733 | /* |
| 734 | * Write out the next block of a file. |
| 735 | */ |
| 736 | static void |
| 737 | xtrfile(char *buf, long size) |
| 738 | { |
| 739 | |
| 740 | if (Nflag) |
| 741 | return; |
| 742 | if (write(ofile, buf, (int) size) == -1) { |
| 743 | fprintf(stderr, |
| 744 | "write error extracting inode %d, name %s\nwrite: %s\n", |
| 745 | curfile.ino, curfile.name, strerror(errno)); |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | /* |
| 750 | * Skip over a hole in a file. |
| 751 | */ |
| 752 | /* ARGSUSED */ |
| 753 | static void |
| 754 | xtrskip(char *buf, long size) |
| 755 | { |
| 756 | |
| 757 | if (lseek(ofile, size, SEEK_CUR) == -1) { |
| 758 | fprintf(stderr, |
| 759 | "seek error extracting inode %d, name %s\nlseek: %s\n", |
| 760 | curfile.ino, curfile.name, strerror(errno)); |
| 761 | done(1); |
| 762 | } |
| 763 | } |
| 764 | |
| 765 | /* |
| 766 | * Collect the next block of a symbolic link. |
| 767 | */ |
| 768 | static void |
| 769 | xtrlnkfile(char *buf, long size) |
| 770 | { |
| 771 | |
| 772 | pathlen += size; |
| 773 | if (pathlen > MAXPATHLEN) { |
| 774 | fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n", |
| 775 | curfile.name, lnkbuf, buf, pathlen); |
| 776 | done(1); |
| 777 | } |
| 778 | strcat(lnkbuf, buf); |
| 779 | } |
| 780 | |
| 781 | /* |
| 782 | * Skip over a hole in a symbolic link (should never happen). |
| 783 | */ |
| 784 | /* ARGSUSED */ |
| 785 | static void |
| 786 | xtrlnkskip(char *buf, long size) |
| 787 | { |
| 788 | |
| 789 | fprintf(stderr, "unallocated block in symbolic link %s\n", |
| 790 | curfile.name); |
| 791 | done(1); |
| 792 | } |
| 793 | |
| 794 | /* |
| 795 | * Collect the next block of a bit map. |
| 796 | */ |
| 797 | static void |
| 798 | xtrmap(char *buf, long size) |
| 799 | { |
| 800 | |
| 801 | memmove(map, buf, size); |
| 802 | map += size; |
| 803 | } |
| 804 | |
| 805 | /* |
| 806 | * Skip over a hole in a bit map (should never happen). |
| 807 | */ |
| 808 | /* ARGSUSED */ |
| 809 | static void |
| 810 | xtrmapskip(char *buf, long size) |
| 811 | { |
| 812 | |
| 813 | panic("hole in map\n"); |
| 814 | map += size; |
| 815 | } |
| 816 | |
| 817 | /* |
| 818 | * Noop, when an extraction function is not needed. |
| 819 | */ |
| 820 | /* ARGSUSED */ |
| 821 | void |
| 822 | xtrnull(char *buf, long size) |
| 823 | { |
| 824 | |
| 825 | return; |
| 826 | } |
| 827 | |
| 828 | /* |
| 829 | * Read TP_BSIZE blocks from the input. |
| 830 | * Handle read errors, and end of media. |
| 831 | */ |
| 832 | static void |
| 833 | readtape(char *buf) |
| 834 | { |
| 835 | long rd, newvol, i; |
| 836 | int cnt, seek_failed; |
| 837 | |
| 838 | if (blkcnt < numtrec) { |
| 839 | memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE); |
| 840 | blksread++; |
| 841 | tapeaddr++; |
| 842 | return; |
| 843 | } |
| 844 | for (i = 0; i < ntrec; i++) |
| 845 | ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; |
| 846 | if (numtrec == 0) |
| 847 | numtrec = ntrec; |
| 848 | cnt = ntrec * TP_BSIZE; |
| 849 | rd = 0; |
| 850 | getmore: |
| 851 | #ifdef RRESTORE |
| 852 | if (host) |
| 853 | i = rmtread(&tapebuf[rd], cnt); |
| 854 | else |
| 855 | #endif |
| 856 | i = read(mt, &tapebuf[rd], cnt); |
| 857 | /* |
| 858 | * Check for mid-tape short read error. |
| 859 | * If found, skip rest of buffer and start with the next. |
| 860 | */ |
| 861 | if (!pipein && numtrec < ntrec && i > 0) { |
| 862 | dprintf(stdout, "mid-media short read error.\n"); |
| 863 | numtrec = ntrec; |
| 864 | } |
| 865 | /* |
| 866 | * Handle partial block read. |
| 867 | */ |
| 868 | if (pipein && i == 0 && rd > 0) |
| 869 | i = rd; |
| 870 | else if (i > 0 && i != ntrec * TP_BSIZE) { |
| 871 | if (pipein) { |
| 872 | rd += i; |
| 873 | cnt -= i; |
| 874 | if (cnt > 0) |
| 875 | goto getmore; |
| 876 | i = rd; |
| 877 | } else { |
| 878 | /* |
| 879 | * Short read. Process the blocks read. |
| 880 | */ |
| 881 | if (i % TP_BSIZE != 0) |
| 882 | vprintf(stdout, |
| 883 | "partial block read: %ld should be %ld\n", |
| 884 | i, ntrec * TP_BSIZE); |
| 885 | numtrec = i / TP_BSIZE; |
| 886 | } |
| 887 | } |
| 888 | /* |
| 889 | * Handle read error. |
| 890 | */ |
| 891 | if (i < 0) { |
| 892 | fprintf(stderr, "Tape read error while "); |
| 893 | switch (curfile.action) { |
| 894 | default: |
| 895 | fprintf(stderr, "trying to set up tape\n"); |
| 896 | break; |
| 897 | case UNKNOWN: |
| 898 | fprintf(stderr, "trying to resynchronize\n"); |
| 899 | break; |
| 900 | case USING: |
| 901 | fprintf(stderr, "restoring %s\n", curfile.name); |
| 902 | break; |
| 903 | case SKIP: |
| 904 | fprintf(stderr, "skipping over inode %d\n", |
| 905 | curfile.ino); |
| 906 | break; |
| 907 | } |
| 908 | if (!yflag && !reply("continue")) |
| 909 | done(1); |
| 910 | i = ntrec * TP_BSIZE; |
| 911 | memset(tapebuf, 0, i); |
| 912 | #ifdef RRESTORE |
| 913 | if (host) |
| 914 | seek_failed = (rmtseek(i, 1) < 0); |
| 915 | else |
| 916 | #endif |
| 917 | seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1); |
| 918 | |
| 919 | if (seek_failed) { |
| 920 | fprintf(stderr, |
| 921 | "continuation failed: %s\n", strerror(errno)); |
| 922 | done(1); |
| 923 | } |
| 924 | } |
| 925 | /* |
| 926 | * Handle end of tape. |
| 927 | */ |
| 928 | if (i == 0) { |
| 929 | vprintf(stdout, "End-of-tape encountered\n"); |
| 930 | if (!pipein) { |
| 931 | newvol = volno + 1; |
| 932 | volno = 0; |
| 933 | numtrec = 0; |
| 934 | getvol(newvol); |
| 935 | readtape(buf); |
| 936 | return; |
| 937 | } |
| 938 | if (rd % TP_BSIZE != 0) |
| 939 | panic("partial block read: %d should be %d\n", |
| 940 | rd, ntrec * TP_BSIZE); |
| 941 | terminateinput(); |
| 942 | memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE); |
| 943 | } |
| 944 | blkcnt = 0; |
| 945 | memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE); |
| 946 | blksread++; |
| 947 | tapeaddr++; |
| 948 | } |
| 949 | |
| 950 | static void |
| 951 | findtapeblksize(void) |
| 952 | { |
| 953 | register long i; |
| 954 | |
| 955 | for (i = 0; i < ntrec; i++) |
| 956 | ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; |
| 957 | blkcnt = 0; |
| 958 | #ifdef RRESTORE |
| 959 | if (host) |
| 960 | i = rmtread(tapebuf, ntrec * TP_BSIZE); |
| 961 | else |
| 962 | #endif |
| 963 | i = read(mt, tapebuf, ntrec * TP_BSIZE); |
| 964 | |
| 965 | if (i <= 0) { |
| 966 | fprintf(stderr, "tape read error: %s\n", strerror(errno)); |
| 967 | done(1); |
| 968 | } |
| 969 | if (i % TP_BSIZE != 0) { |
| 970 | fprintf(stderr, "Tape block size (%ld) %s (%d)\n", |
| 971 | i, "is not a multiple of dump block size", TP_BSIZE); |
| 972 | done(1); |
| 973 | } |
| 974 | ntrec = i / TP_BSIZE; |
| 975 | numtrec = ntrec; |
| 976 | vprintf(stdout, "Tape block size is %ld\n", ntrec); |
| 977 | } |
| 978 | |
| 979 | void |
| 980 | closemt(void) |
| 981 | { |
| 982 | |
| 983 | if (mt < 0) |
| 984 | return; |
| 985 | #ifdef RRESTORE |
| 986 | if (host) |
| 987 | rmtclose(); |
| 988 | else |
| 989 | #endif |
| 990 | close(mt); |
| 991 | } |
| 992 | |
| 993 | /* |
| 994 | * Read the next block from the tape. |
| 995 | * Check to see if it is one of several vintage headers. |
| 996 | * If it is an old style header, convert it to a new style header. |
| 997 | * If it is not any valid header, return an error. |
| 998 | */ |
| 999 | static int |
| 1000 | gethead(struct s_spcl *buf) |
| 1001 | { |
| 1002 | long i; |
| 1003 | union { |
| 1004 | quad_t qval; |
| 1005 | int32_t val[2]; |
| 1006 | } qcvt; |
| 1007 | union u_ospcl { |
| 1008 | char dummy[TP_BSIZE]; |
| 1009 | struct s_ospcl { |
| 1010 | int32_t c_type; |
| 1011 | int32_t c_date; |
| 1012 | int32_t c_ddate; |
| 1013 | int32_t c_volume; |
| 1014 | int32_t c_tapea; |
| 1015 | u_short c_inumber; |
| 1016 | int32_t c_magic; |
| 1017 | int32_t c_checksum; |
| 1018 | struct odinode { |
| 1019 | unsigned short odi_mode; |
| 1020 | u_short odi_nlink; |
| 1021 | u_short odi_uid; |
| 1022 | u_short odi_gid; |
| 1023 | int32_t odi_size; |
| 1024 | int32_t odi_rdev; |
| 1025 | char odi_addr[36]; |
| 1026 | int32_t odi_atime; |
| 1027 | int32_t odi_mtime; |
| 1028 | int32_t odi_ctime; |
| 1029 | } c_dinode; |
| 1030 | int32_t c_count; |
| 1031 | char c_addr[256]; |
| 1032 | } s_ospcl; |
| 1033 | } u_ospcl; |
| 1034 | |
| 1035 | if (!cvtflag) { |
| 1036 | readtape((char *)buf); |
| 1037 | if (buf->c_magic != NFS_MAGIC) { |
| 1038 | if (swabl(buf->c_magic) != NFS_MAGIC) |
| 1039 | return (FAIL); |
| 1040 | if (!Bcvt) { |
| 1041 | vprintf(stdout, "Note: Doing Byte swapping\n"); |
| 1042 | Bcvt = 1; |
| 1043 | } |
| 1044 | } |
| 1045 | if (checksum((int *)buf) == FAIL) |
| 1046 | return (FAIL); |
| 1047 | if (Bcvt) { |
| 1048 | swabst((u_char *)"8l4s31l", (u_char *)buf); |
| 1049 | swabst((u_char *)"l",(u_char *) &buf->c_level); |
| 1050 | swabst((u_char *)"2l",(u_char *) &buf->c_flags); |
| 1051 | } |
| 1052 | goto good; |
| 1053 | } |
| 1054 | readtape((char *)(&u_ospcl.s_ospcl)); |
| 1055 | memset(buf, 0, (long)TP_BSIZE); |
| 1056 | buf->c_type = u_ospcl.s_ospcl.c_type; |
| 1057 | buf->c_date = u_ospcl.s_ospcl.c_date; |
| 1058 | buf->c_ddate = u_ospcl.s_ospcl.c_ddate; |
| 1059 | buf->c_volume = u_ospcl.s_ospcl.c_volume; |
| 1060 | buf->c_tapea = u_ospcl.s_ospcl.c_tapea; |
| 1061 | buf->c_inumber = u_ospcl.s_ospcl.c_inumber; |
| 1062 | buf->c_checksum = u_ospcl.s_ospcl.c_checksum; |
| 1063 | buf->c_magic = u_ospcl.s_ospcl.c_magic; |
| 1064 | buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode; |
| 1065 | buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink; |
| 1066 | buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid; |
| 1067 | buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid; |
| 1068 | buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size; |
| 1069 | buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev; |
| 1070 | buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime; |
| 1071 | buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime; |
| 1072 | buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime; |
| 1073 | buf->c_count = u_ospcl.s_ospcl.c_count; |
| 1074 | memmove(buf->c_addr, u_ospcl.s_ospcl.c_addr, (long)256); |
| 1075 | if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC || |
| 1076 | checksum((int *)(&u_ospcl.s_ospcl)) == FAIL) |
| 1077 | return(FAIL); |
| 1078 | buf->c_magic = NFS_MAGIC; |
| 1079 | |
| 1080 | good: |
| 1081 | if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) && |
| 1082 | (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) { |
| 1083 | qcvt.qval = buf->c_dinode.di_size; |
| 1084 | if (qcvt.val[0] || qcvt.val[1]) { |
| 1085 | printf("Note: Doing Quad swapping\n"); |
| 1086 | Qcvt = 1; |
| 1087 | } |
| 1088 | } |
| 1089 | if (Qcvt) { |
| 1090 | qcvt.qval = buf->c_dinode.di_size; |
| 1091 | i = qcvt.val[1]; |
| 1092 | qcvt.val[1] = qcvt.val[0]; |
| 1093 | qcvt.val[0] = i; |
| 1094 | buf->c_dinode.di_size = qcvt.qval; |
| 1095 | } |
| 1096 | readmapflag = 0; |
| 1097 | |
| 1098 | switch (buf->c_type) { |
| 1099 | |
| 1100 | case TS_CLRI: |
| 1101 | case TS_BITS: |
| 1102 | /* |
| 1103 | * Have to patch up missing information in bit map headers |
| 1104 | */ |
| 1105 | buf->c_inumber = 0; |
| 1106 | buf->c_dinode.di_size = buf->c_count * TP_BSIZE; |
| 1107 | if (buf->c_count > TP_NINDIR) |
| 1108 | readmapflag = 1; |
| 1109 | else |
| 1110 | for (i = 0; i < buf->c_count; i++) |
| 1111 | buf->c_addr[i]++; |
| 1112 | break; |
| 1113 | |
| 1114 | case TS_TAPE: |
| 1115 | if ((buf->c_flags & DR_NEWINODEFMT) == 0) |
| 1116 | oldinofmt = 1; |
| 1117 | /* fall through */ |
| 1118 | case TS_END: |
| 1119 | buf->c_inumber = 0; |
| 1120 | break; |
| 1121 | |
| 1122 | case TS_INODE: |
| 1123 | case TS_ADDR: |
| 1124 | break; |
| 1125 | |
| 1126 | default: |
| 1127 | panic("gethead: unknown inode type %d\n", buf->c_type); |
| 1128 | break; |
| 1129 | } |
| 1130 | /* |
| 1131 | * If we are restoring a filesystem with old format inodes, |
| 1132 | * copy the uid/gid to the new location. |
| 1133 | */ |
| 1134 | if (oldinofmt) { |
| 1135 | buf->c_dinode.di_uid = buf->c_dinode.di_ouid; |
| 1136 | buf->c_dinode.di_gid = buf->c_dinode.di_ogid; |
| 1137 | } |
| 1138 | tapeaddr = buf->c_tapea; |
| 1139 | if (dflag) |
| 1140 | accthdr(buf); |
| 1141 | return(GOOD); |
| 1142 | } |
| 1143 | |
| 1144 | /* |
| 1145 | * Check that a header is where it belongs and predict the next header |
| 1146 | */ |
| 1147 | static void |
| 1148 | accthdr(struct s_spcl *header) |
| 1149 | { |
| 1150 | static ino_t previno = 0x7fffffff; |
| 1151 | static int prevtype; |
| 1152 | static long predict; |
| 1153 | long blks, i; |
| 1154 | |
| 1155 | if (header->c_type == TS_TAPE) { |
| 1156 | fprintf(stderr, "Volume header (%s inode format) ", |
| 1157 | oldinofmt ? "old" : "new"); |
| 1158 | if (header->c_firstrec) |
| 1159 | fprintf(stderr, "begins with record %ld", |
| 1160 | (long)header->c_firstrec); |
| 1161 | fprintf(stderr, "\n"); |
| 1162 | previno = 0x7fffffff; |
| 1163 | return; |
| 1164 | } |
| 1165 | if (previno == 0x7fffffff) |
| 1166 | goto newcalc; |
| 1167 | switch (prevtype) { |
| 1168 | case TS_BITS: |
| 1169 | fprintf(stderr, "Dumped inodes map header"); |
| 1170 | break; |
| 1171 | case TS_CLRI: |
| 1172 | fprintf(stderr, "Used inodes map header"); |
| 1173 | break; |
| 1174 | case TS_INODE: |
| 1175 | fprintf(stderr, "File header, ino %d", previno); |
| 1176 | break; |
| 1177 | case TS_ADDR: |
| 1178 | fprintf(stderr, "File continuation header, ino %d", previno); |
| 1179 | break; |
| 1180 | case TS_END: |
| 1181 | fprintf(stderr, "End of tape header"); |
| 1182 | break; |
| 1183 | } |
| 1184 | if (predict != blksread - 1) |
| 1185 | fprintf(stderr, "; predicted %ld blocks, got %ld blocks", |
| 1186 | predict, blksread - 1); |
| 1187 | fprintf(stderr, "\n"); |
| 1188 | newcalc: |
| 1189 | blks = 0; |
| 1190 | if (header->c_type != TS_END) |
| 1191 | for (i = 0; i < header->c_count; i++) |
| 1192 | if (readmapflag || header->c_addr[i] != 0) |
| 1193 | blks++; |
| 1194 | predict = blks; |
| 1195 | blksread = 0; |
| 1196 | prevtype = header->c_type; |
| 1197 | previno = header->c_inumber; |
| 1198 | } |
| 1199 | |
| 1200 | /* |
| 1201 | * Find an inode header. |
| 1202 | * Complain if had to skip. |
| 1203 | */ |
| 1204 | static void |
| 1205 | findinode(struct s_spcl *header) |
| 1206 | { |
| 1207 | static long skipcnt = 0; |
| 1208 | long i; |
| 1209 | char buf[TP_BSIZE]; |
| 1210 | int htype; |
| 1211 | |
| 1212 | curfile.name = "<name unknown>"; |
| 1213 | curfile.action = UNKNOWN; |
| 1214 | curfile.dip = NULL; |
| 1215 | curfile.ino = 0; |
| 1216 | do { |
| 1217 | if (header->c_magic != NFS_MAGIC) { |
| 1218 | skipcnt++; |
| 1219 | while (gethead(header) == FAIL || |
| 1220 | header->c_date != dumpdate) |
| 1221 | skipcnt++; |
| 1222 | } |
| 1223 | htype = header->c_type; |
| 1224 | switch (htype) { |
| 1225 | |
| 1226 | case TS_ADDR: |
| 1227 | /* |
| 1228 | * Skip up to the beginning of the next record |
| 1229 | */ |
| 1230 | for (i = 0; i < header->c_count; i++) |
| 1231 | if (header->c_addr[i]) |
| 1232 | readtape(buf); |
| 1233 | while (gethead(header) == FAIL || |
| 1234 | header->c_date != dumpdate) |
| 1235 | skipcnt++; |
| 1236 | break; |
| 1237 | |
| 1238 | case TS_INODE: |
| 1239 | curfile.dip = &header->c_dinode; |
| 1240 | curfile.ino = header->c_inumber; |
| 1241 | break; |
| 1242 | |
| 1243 | case TS_END: |
| 1244 | /* If we missed some tapes, get another volume. */ |
| 1245 | if (tapesread & (tapesread + 1)) { |
| 1246 | getvol(0); |
| 1247 | continue; |
| 1248 | } |
| 1249 | curfile.ino = maxino; |
| 1250 | break; |
| 1251 | |
| 1252 | case TS_CLRI: |
| 1253 | curfile.name = "<file removal list>"; |
| 1254 | break; |
| 1255 | |
| 1256 | case TS_BITS: |
| 1257 | curfile.name = "<file dump list>"; |
| 1258 | break; |
| 1259 | |
| 1260 | case TS_TAPE: |
| 1261 | panic("unexpected tape header\n"); |
| 1262 | /* NOTREACHED */ |
| 1263 | |
| 1264 | default: |
| 1265 | panic("unknown tape header type %d\n", spcl.c_type); |
| 1266 | /* NOTREACHED */ |
| 1267 | |
| 1268 | } |
| 1269 | } while (htype == TS_ADDR); |
| 1270 | if (skipcnt > 0) |
| 1271 | fprintf(stderr, "resync restore, skipped %ld blocks\n", |
| 1272 | skipcnt); |
| 1273 | skipcnt = 0; |
| 1274 | } |
| 1275 | |
| 1276 | static int |
| 1277 | checksum(register int *buf) |
| 1278 | { |
| 1279 | register int i, j; |
| 1280 | |
| 1281 | j = sizeof(union u_spcl) / sizeof(int); |
| 1282 | i = 0; |
| 1283 | if(!Bcvt) { |
| 1284 | do |
| 1285 | i += *buf++; |
| 1286 | while (--j); |
| 1287 | } else { |
| 1288 | /* What happens if we want to read restore tapes |
| 1289 | for a 16bit int machine??? */ |
| 1290 | do |
| 1291 | i += swabl(*buf++); |
| 1292 | while (--j); |
| 1293 | } |
| 1294 | |
| 1295 | if (i != CHECKSUM) { |
| 1296 | fprintf(stderr, "Checksum error %o, inode %d file %s\n", i, |
| 1297 | curfile.ino, curfile.name); |
| 1298 | return(FAIL); |
| 1299 | } |
| 1300 | return(GOOD); |
| 1301 | } |
| 1302 | |
| 1303 | #ifdef RRESTORE |
| 1304 | #include <stdarg.h> |
| 1305 | |
| 1306 | void |
| 1307 | msg(const char *fmt, ...) |
| 1308 | { |
| 1309 | va_list ap; |
| 1310 | va_start(ap, fmt); |
| 1311 | vfprintf(stderr, fmt, ap); |
| 1312 | va_end(ap); |
| 1313 | } |
| 1314 | #endif /* RRESTORE */ |
| 1315 | |
| 1316 | static u_char * |
| 1317 | swabshort(register u_char *sp, register int n) |
| 1318 | { |
| 1319 | char c; |
| 1320 | |
| 1321 | while (--n >= 0) { |
| 1322 | c = sp[0]; sp[0] = sp[1]; sp[1] = c; |
| 1323 | sp += 2; |
| 1324 | } |
| 1325 | return (sp); |
| 1326 | } |
| 1327 | |
| 1328 | static u_char * |
| 1329 | swablong(register u_char *sp, register int n) |
| 1330 | { |
| 1331 | char c; |
| 1332 | |
| 1333 | while (--n >= 0) { |
| 1334 | c = sp[0]; sp[0] = sp[3]; sp[3] = c; |
| 1335 | c = sp[2]; sp[2] = sp[1]; sp[1] = c; |
| 1336 | sp += 4; |
| 1337 | } |
| 1338 | return (sp); |
| 1339 | } |
| 1340 | |
| 1341 | void |
| 1342 | swabst(register u_char *cp, register u_char *sp) |
| 1343 | { |
| 1344 | int n = 0; |
| 1345 | |
| 1346 | while (*cp) { |
| 1347 | switch (*cp) { |
| 1348 | case '0': case '1': case '2': case '3': case '4': |
| 1349 | case '5': case '6': case '7': case '8': case '9': |
| 1350 | n = (n * 10) + (*cp++ - '0'); |
| 1351 | continue; |
| 1352 | |
| 1353 | case 's': case 'w': case 'h': |
| 1354 | if (n == 0) |
| 1355 | n = 1; |
| 1356 | sp = swabshort(sp, n); |
| 1357 | break; |
| 1358 | |
| 1359 | case 'l': |
| 1360 | if (n == 0) |
| 1361 | n = 1; |
| 1362 | sp = swablong(sp, n); |
| 1363 | break; |
| 1364 | |
| 1365 | default: /* Any other character, like 'b' counts as byte. */ |
| 1366 | if (n == 0) |
| 1367 | n = 1; |
| 1368 | sp += n; |
| 1369 | break; |
| 1370 | } |
| 1371 | cp++; |
| 1372 | n = 0; |
| 1373 | } |
| 1374 | } |
| 1375 | |
| 1376 | static u_long |
| 1377 | swabl(u_long x) |
| 1378 | { |
| 1379 | swabst((u_char *)"l", (u_char *)&x); |
| 1380 | return (x); |
| 1381 | } |