Remove the matching for the host to PCI bridge, since this is actually
[dragonfly.git] / sbin / restore / tape.c
CommitLineData
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MD
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.
1de703da
MD
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 $
b5744197 40 * $DragonFly: src/sbin/restore/tape.c,v 1.4 2003/09/28 14:39:22 hmp Exp $
984263bc
MD
41 */
42
984263bc
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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
38a690d7 49#include <vfs/ufs/dinode.h>
984263bc
MD
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
64static long fssize = MAXBSIZE;
65static int mt = -1;
66static int pipein = 0;
67static char *magtape;
68static int blkcnt;
69static int numtrec;
70static char *tapebuf;
71static union u_spcl endoftapemark;
72static long blksread; /* blocks read since last header */
73static long tapeaddr = 0; /* current TP_BSIZE tape record */
74static long tapesread;
75static jmp_buf restart;
76static int gettingfile = 0; /* restart has a valid frame */
77static char *host = NULL;
78
79static int ofile;
80static char *map;
81static char lnkbuf[MAXPATHLEN + 1];
82static int pathlen;
83
84int oldinofmt; /* old inode format conversion required */
85int Bcvt; /* Swap Bytes (for CCI or sun) */
86static int Qcvt; /* Swap quads (for sun) */
87
88#define FLUSHTAPEBUF() blkcnt = ntrec + 1
89
90static void accthdr __P((struct s_spcl *));
91static int checksum __P((int *));
92static void findinode __P((struct s_spcl *));
93static void findtapeblksize __P((void));
94static int gethead __P((struct s_spcl *));
95static void readtape __P((char *));
96static void setdumpnum __P((void));
97static u_long swabl __P((u_long));
98static u_char *swablong __P((u_char *, int));
99static u_char *swabshort __P((u_char *, int));
100static void terminateinput __P((void));
101static void xtrfile __P((char *, long));
102static void xtrlnkfile __P((char *, long));
103static void xtrlnkskip __P((char *, long));
104static void xtrmap __P((char *, long));
105static void xtrmapskip __P((char *, long));
106static void xtrskip __P((char *, long));
107
108static int readmapflag;
109
110/*
111 * Set up an input source
112 */
113void
b5744197 114setinput(char *source)
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MD
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 (void)fprintf(stderr, "cannot open %s: %s\n",
140 _PATH_TTY, strerror(errno));
141 terminal = fopen(_PATH_DEVNULL, "r");
142 if (terminal == NULL) {
143 (void)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
158void
b5744197 159newtapebuf(long size)
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MD
160{
161 static 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 */
180void
b5744197 181setup(void)
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MD
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 */
292void
b5744197 293getvol(long nextvol)
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MD
294{
295 long newvol, 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 }
317again:
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 (void) 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 (void) 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 (void) strcpy(magtape, buf);
373 magtape[strlen(magtape) - 1] = '\0';
374 }
375#ifdef RRESTORE
376 if (host)
377 mt = rmtopen(magtape, 0);
378 else
379#endif
380 mt = open(magtape, O_RDONLY, 0);
381
382 if (mt == -1) {
383 fprintf(stderr, "Cannot open %s\n", magtape);
384 volno = -1;
385 goto again;
386 }
387gethdr:
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", 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 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 (void) gethead(&spcl);
453 findinode(&spcl);
454 if (gettingfile) {
455 gettingfile = 0;
456 longjmp(restart, 1);
457 }
458}
459
460/*
461 * Handle unexpected EOF.
462 */
463static void
b5744197 464terminateinput(void)
984263bc
MD
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 */
485static void
b5744197 486setdumpnum(void)
984263bc
MD
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
507void
b5744197 508printdumpinfo(void)
984263bc
MD
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 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
517 fprintf(stderr, "Label: %s\n", spcl.c_label);
518}
519
520int
b5744197 521extractfile(char *name)
984263bc
MD
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 (void) lchown(name, uid, gid);
574 (void) lchmod(name, mode);
575 (void) 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 (void)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 (void) chown(name, uid, gid);
595 (void) chmod(name, mode);
596 (void) utimes(name, timep);
597 (void) 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 (void)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 (void) chown(name, uid, gid);
617 (void) chmod(name, mode);
618 (void) utimes(name, timep);
619 (void) 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 (void)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 (void) fchown(ofile, uid, gid);
639 (void) fchmod(ofile, mode);
640 getfile(xtrfile, xtrskip);
641 (void) close(ofile);
642 utimes(name, timep);
643 (void) chflags(name, flags);
644 return (GOOD);
645 }
646 /* NOTREACHED */
647}
648
649/*
650 * skip over bit maps on the tape
651 */
652void
b5744197 653skipmaps(void)
984263bc
MD
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 */
663void
b5744197 664skipfile(void)
984263bc
MD
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 */
677void
b5744197 678getfile(void (*fill) (char *, long), void (*skip) (char *, long))
984263bc
MD
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++;
694loop:
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 */
736static void
b5744197 737xtrfile(char *buf, long size)
984263bc
MD
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 */
753static void
b5744197 754xtrskip(char *buf, long size)
984263bc
MD
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 */
768static void
b5744197 769xtrlnkfile(char *buf, long size)
984263bc
MD
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 (void) strcat(lnkbuf, buf);
779}
780
781/*
782 * Skip over a hole in a symbolic link (should never happen).
783 */
784/* ARGSUSED */
785static void
b5744197 786xtrlnkskip(char *buf, long size)
984263bc
MD
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 */
797static void
b5744197 798xtrmap(char *buf, long size)
984263bc
MD
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 */
809static void
b5744197 810xtrmapskip(char *buf, long size)
984263bc
MD
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 */
821void
b5744197 822xtrnull(char *buf, long size)
984263bc
MD
823{
824
825 return;
826}
827
828/*
829 * Read TP_BSIZE blocks from the input.
830 * Handle read errors, and end of media.
831 */
832static void
b5744197 833readtape(char *buf)
984263bc
MD
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;
850getmore:
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
950static void
b5744197 951findtapeblksize(void)
984263bc
MD
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
979void
b5744197 980closemt(void)
984263bc
MD
981{
982
983 if (mt < 0)
984 return;
985#ifdef RRESTORE
986 if (host)
987 rmtclose();
988 else
989#endif
990 (void) 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 */
999static int
b5744197 1000gethead(struct s_spcl *buf)
984263bc
MD
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
1080good:
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 */
1147static void
b5744197 1148accthdr(struct s_spcl *header)
984263bc
MD
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 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");
1188newcalc:
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 */
1204static void
b5744197 1205findinode(struct s_spcl *header)
984263bc
MD
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
1276static int
b5744197 1277checksum(register int *buf)
984263bc
MD
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
984263bc 1304#include <stdarg.h>
984263bc
MD
1305
1306void
984263bc 1307msg(const char *fmt, ...)
984263bc
MD
1308{
1309 va_list ap;
984263bc 1310 va_start(ap, fmt);
984263bc
MD
1311 (void)vfprintf(stderr, fmt, ap);
1312 va_end(ap);
1313}
1314#endif /* RRESTORE */
1315
1316static u_char *
b5744197 1317swabshort(register u_char *sp, register int n)
984263bc
MD
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
1328static u_char *
b5744197 1329swablong(register u_char *sp, register int n)
984263bc
MD
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
1341void
b5744197 1342swabst(register u_char *cp, register u_char *sp)
984263bc
MD
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
1376static u_long
b5744197 1377swabl(u_long x)
984263bc
MD
1378{
1379 swabst((u_char *)"l", (u_char *)&x);
1380 return (x);
1381}