namecache work stage 2: move struct namecache to its own header file and
[dragonfly.git] / sbin / restore / tape.c
CommitLineData
984263bc
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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 $
38a690d7 40 * $DragonFly: src/sbin/restore/tape.c,v 1.3 2003/08/08 04:18:40 dillon Exp $
984263bc
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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
114setinput(source)
115 char *source;
116{
117 FLUSHTAPEBUF();
118 if (bflag)
119 newtapebuf(ntrec);
120 else
121 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
122 terminal = stdin;
123
124#ifdef RRESTORE
125 if (strchr(source, ':')) {
126 host = source;
127 source = strchr(host, ':');
128 *source++ = '\0';
129 if (rmthost(host) == 0)
130 done(1);
131 } else
132#endif
133 if (strcmp(source, "-") == 0) {
134 /*
135 * Since input is coming from a pipe we must establish
136 * our own connection to the terminal.
137 */
138 terminal = fopen(_PATH_TTY, "r");
139 if (terminal == NULL) {
140 (void)fprintf(stderr, "cannot open %s: %s\n",
141 _PATH_TTY, strerror(errno));
142 terminal = fopen(_PATH_DEVNULL, "r");
143 if (terminal == NULL) {
144 (void)fprintf(stderr, "cannot open %s: %s\n",
145 _PATH_DEVNULL, strerror(errno));
146 done(1);
147 }
148 }
149 pipein++;
150 }
151 setuid(getuid()); /* no longer need or want root privileges */
152 magtape = strdup(source);
153 if (magtape == NULL) {
154 fprintf(stderr, "Cannot allocate space for magtape buffer\n");
155 done(1);
156 }
157}
158
159void
160newtapebuf(size)
161 long size;
162{
163 static tapebufsize = -1;
164
165 ntrec = size;
166 if (size <= tapebufsize)
167 return;
168 if (tapebuf != NULL)
169 free(tapebuf);
170 tapebuf = malloc(size * TP_BSIZE);
171 if (tapebuf == NULL) {
172 fprintf(stderr, "Cannot allocate space for tape buffer\n");
173 done(1);
174 }
175 tapebufsize = size;
176}
177
178/*
179 * Verify that the tape drive can be accessed and
180 * that it actually is a dump tape.
181 */
182void
183setup()
184{
185 int i, j, *ip;
186 struct stat stbuf;
187
188 vprintf(stdout, "Verify tape and initialize maps\n");
189#ifdef RRESTORE
190 if (host)
191 mt = rmtopen(magtape, 0);
192 else
193#endif
194 if (pipein)
195 mt = 0;
196 else
197 mt = open(magtape, O_RDONLY, 0);
198 if (mt < 0) {
199 fprintf(stderr, "%s: %s\n", magtape, strerror(errno));
200 done(1);
201 }
202 volno = 1;
203 setdumpnum();
204 FLUSHTAPEBUF();
205 if (!pipein && !bflag)
206 findtapeblksize();
207 if (gethead(&spcl) == FAIL) {
208 blkcnt--; /* push back this block */
209 blksread--;
210 cvtflag++;
211 if (gethead(&spcl) == FAIL) {
212 fprintf(stderr, "Tape is not a dump tape\n");
213 done(1);
214 }
215 fprintf(stderr, "Converting to new file system format.\n");
216 }
217 if (pipein) {
218 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC;
219 endoftapemark.s_spcl.c_type = TS_END;
220 ip = (int *)&endoftapemark;
221 j = sizeof(union u_spcl) / sizeof(int);
222 i = 0;
223 do
224 i += *ip++;
225 while (--j);
226 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
227 }
228 if (vflag || command == 't')
229 printdumpinfo();
230 dumptime = spcl.c_ddate;
231 dumpdate = spcl.c_date;
232 if (stat(".", &stbuf) < 0) {
233 fprintf(stderr, "cannot stat .: %s\n", strerror(errno));
234 done(1);
235 }
236 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
237 fssize = TP_BSIZE;
238 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
239 fssize = stbuf.st_blksize;
240 if (((fssize - 1) & fssize) != 0) {
241 fprintf(stderr, "bad block size %ld\n", fssize);
242 done(1);
243 }
244 if (spcl.c_volume != 1) {
245 fprintf(stderr, "Tape is not volume 1 of the dump\n");
246 done(1);
247 }
248 if (gethead(&spcl) == FAIL) {
249 dprintf(stdout, "header read failed at %ld blocks\n", blksread);
250 panic("no header after volume mark!\n");
251 }
252 findinode(&spcl);
253 if (spcl.c_type != TS_CLRI) {
254 fprintf(stderr, "Cannot find file removal list\n");
255 done(1);
256 }
257 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
258 dprintf(stdout, "maxino = %d\n", maxino);
259 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
260 if (map == NULL)
261 panic("no memory for active inode map\n");
262 usedinomap = map;
263 curfile.action = USING;
264 getfile(xtrmap, xtrmapskip);
265 if (spcl.c_type != TS_BITS) {
266 fprintf(stderr, "Cannot find file dump list\n");
267 done(1);
268 }
269 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
270 if (map == (char *)NULL)
271 panic("no memory for file dump list\n");
272 dumpmap = map;
273 curfile.action = USING;
274 getfile(xtrmap, xtrmapskip);
275 /*
276 * If there may be whiteout entries on the tape, pretend that the
277 * whiteout inode exists, so that the whiteout entries can be
278 * extracted.
279 */
280 if (oldinofmt == 0)
281 SETINO(WINO, dumpmap);
282 /* 'r' restores don't call getvol() for tape 1, so mark it as read. */
283 if (command == 'r')
284 tapesread = 1;
285}
286
287/*
288 * Prompt user to load a new dump volume.
289 * "Nextvol" is the next suggested volume to use.
290 * This suggested volume is enforced when doing full
291 * or incremental restores, but can be overridden by
292 * the user when only extracting a subset of the files.
293 */
294void
295getvol(nextvol)
296 long nextvol;
297{
298 long newvol, prevtapea, savecnt, i;
299 union u_spcl tmpspcl;
300# define tmpbuf tmpspcl.s_spcl
301 char buf[TP_BSIZE];
302
303 if (nextvol == 1) {
304 tapesread = 0;
305 gettingfile = 0;
306 }
307 prevtapea = tapeaddr;
308 savecnt = blksread;
309 if (pipein) {
310 if (nextvol != 1) {
311 panic("Changing volumes on pipe input?\n");
312 /* Avoid looping if we couldn't ask the user. */
313 if (yflag || ferror(terminal) || feof(terminal))
314 done(1);
315 }
316 if (volno == 1)
317 return;
318 goto gethdr;
319 }
320again:
321 if (pipein)
322 done(1); /* pipes do not get a second chance */
323 if (command == 'R' || command == 'r' || curfile.action != SKIP)
324 newvol = nextvol;
325 else
326 newvol = 0;
327 while (newvol <= 0) {
328 if (tapesread == 0) {
329 fprintf(stderr, "%s%s%s%s%s%s%s",
330 "You have not read any tapes yet.\n",
331 "If you are extracting just a few files,",
332 " start with the last volume\n",
333 "and work towards the first; restore",
334 " can quickly skip tapes that\n",
335 "have no further files to extract.",
336 " Otherwise, begin with volume 1.\n");
337 } else {
338 fprintf(stderr, "You have read volumes");
339 strcpy(buf, ": ");
340 for (i = 0; i < 32; i++)
341 if (tapesread & (1 << i)) {
342 fprintf(stderr, "%s%ld", buf, i + 1);
343 strcpy(buf, ", ");
344 }
345 fprintf(stderr, "\n");
346 }
347 do {
348 fprintf(stderr, "Specify next volume #: ");
349 (void) fflush(stderr);
350 if (fgets(buf, BUFSIZ, terminal) == NULL)
351 done(1);
352 } while (buf[0] == '\n');
353 newvol = atoi(buf);
354 if (newvol <= 0) {
355 fprintf(stderr,
356 "Volume numbers are positive numerics\n");
357 }
358 }
359 if (newvol == volno) {
360 tapesread |= 1 << (volno - 1);
361 return;
362 }
363 closemt();
364 fprintf(stderr, "Mount tape volume %ld\n", newvol);
365 fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
366 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
367 (void) fflush(stderr);
368 if (fgets(buf, BUFSIZ, terminal) == NULL)
369 done(1);
370 if (!strcmp(buf, "none\n")) {
371 terminateinput();
372 return;
373 }
374 if (buf[0] != '\n') {
375 (void) strcpy(magtape, buf);
376 magtape[strlen(magtape) - 1] = '\0';
377 }
378#ifdef RRESTORE
379 if (host)
380 mt = rmtopen(magtape, 0);
381 else
382#endif
383 mt = open(magtape, O_RDONLY, 0);
384
385 if (mt == -1) {
386 fprintf(stderr, "Cannot open %s\n", magtape);
387 volno = -1;
388 goto again;
389 }
390gethdr:
391 volno = newvol;
392 setdumpnum();
393 FLUSHTAPEBUF();
394 if (gethead(&tmpbuf) == FAIL) {
395 dprintf(stdout, "header read failed at %ld blocks\n", blksread);
396 fprintf(stderr, "tape is not dump tape\n");
397 volno = 0;
398 goto again;
399 }
400 if (tmpbuf.c_volume != volno) {
401 fprintf(stderr, "Wrong volume (%ld)\n", tmpbuf.c_volume);
402 volno = 0;
403 goto again;
404 }
405 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
406 fprintf(stderr, "Wrong dump date\n\tgot: %s",
407 ctime(&tmpbuf.c_date));
408 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
409 volno = 0;
410 goto again;
411 }
412 tapesread |= 1 << (volno - 1);
413 blksread = savecnt;
414 /*
415 * If continuing from the previous volume, skip over any
416 * blocks read already at the end of the previous volume.
417 *
418 * If coming to this volume at random, skip to the beginning
419 * of the next record.
420 */
421 dprintf(stdout, "last rec %ld, tape starts with %ld\n", prevtapea,
422 tmpbuf.c_tapea);
423 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
424 if (curfile.action != USING) {
425 /*
426 * XXX Dump incorrectly sets c_count to 1 in the
427 * volume header of the first tape, so ignore
428 * c_count when volno == 1.
429 */
430 if (volno != 1)
431 for (i = tmpbuf.c_count; i > 0; i--)
432 readtape(buf);
433 } else if (tmpbuf.c_tapea <= prevtapea) {
434 /*
435 * Normally the value of c_tapea in the volume
436 * header is the record number of the header itself.
437 * However in the volume header following an EOT-
438 * terminated tape, it is the record number of the
439 * first continuation data block (dump bug?).
440 *
441 * The next record we want is `prevtapea + 1'.
442 */
443 i = prevtapea + 1 - tmpbuf.c_tapea;
444 dprintf(stderr, "Skipping %ld duplicate record%s.\n",
445 i, i > 1 ? "s" : "");
446 while (--i >= 0)
447 readtape(buf);
448 }
449 }
450 if (curfile.action == USING) {
451 if (volno == 1)
452 panic("active file into volume 1\n");
453 return;
454 }
455 (void) gethead(&spcl);
456 findinode(&spcl);
457 if (gettingfile) {
458 gettingfile = 0;
459 longjmp(restart, 1);
460 }
461}
462
463/*
464 * Handle unexpected EOF.
465 */
466static void
467terminateinput()
468{
469
470 if (gettingfile && curfile.action == USING) {
471 printf("Warning: %s %s\n",
472 "End-of-input encountered while extracting", curfile.name);
473 }
474 curfile.name = "<name unknown>";
475 curfile.action = UNKNOWN;
476 curfile.dip = NULL;
477 curfile.ino = maxino;
478 if (gettingfile) {
479 gettingfile = 0;
480 longjmp(restart, 1);
481 }
482}
483
484/*
485 * handle multiple dumps per tape by skipping forward to the
486 * appropriate one.
487 */
488static void
489setdumpnum()
490{
491 struct mtop tcom;
492
493 if (dumpnum == 1 || volno != 1)
494 return;
495 if (pipein) {
496 fprintf(stderr, "Cannot have multiple dumps on pipe input\n");
497 done(1);
498 }
499 tcom.mt_op = MTFSF;
500 tcom.mt_count = dumpnum - 1;
501#ifdef RRESTORE
502 if (host)
503 rmtioctl(MTFSF, dumpnum - 1);
504 else
505#endif
506 if (ioctl(mt, MTIOCTOP, (char *)&tcom) < 0)
507 fprintf(stderr, "ioctl MTFSF: %s\n", strerror(errno));
508}
509
510void
511printdumpinfo()
512{
513 fprintf(stdout, "Dump date: %s", ctime(&spcl.c_date));
514 fprintf(stdout, "Dumped from: %s",
515 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&spcl.c_ddate));
516 if (spcl.c_host[0] == '\0')
517 return;
518 fprintf(stderr, "Level %ld dump of %s on %s:%s\n",
519 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
520 fprintf(stderr, "Label: %s\n", spcl.c_label);
521}
522
523int
524extractfile(name)
525 char *name;
526{
527 int flags;
528 uid_t uid;
529 gid_t gid;
530 mode_t mode;
531 struct timeval timep[2];
532 struct entry *ep;
533
534 curfile.name = name;
535 curfile.action = USING;
536 timep[0].tv_sec = curfile.dip->di_atime;
537 timep[0].tv_usec = curfile.dip->di_atimensec / 1000;
538 timep[1].tv_sec = curfile.dip->di_mtime;
539 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000;
540 uid = curfile.dip->di_uid;
541 gid = curfile.dip->di_gid;
542 mode = curfile.dip->di_mode;
543 flags = curfile.dip->di_flags;
544 switch (mode & IFMT) {
545
546 default:
547 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
548 skipfile();
549 return (FAIL);
550
551 case IFSOCK:
552 vprintf(stdout, "skipped socket %s\n", name);
553 skipfile();
554 return (GOOD);
555
556 case IFDIR:
557 if (mflag) {
558 ep = lookupname(name);
559 if (ep == NULL || ep->e_flags & EXTRACT)
560 panic("unextracted directory %s\n", name);
561 skipfile();
562 return (GOOD);
563 }
564 vprintf(stdout, "extract file %s\n", name);
565 return (genliteraldir(name, curfile.ino));
566
567 case IFLNK:
568 lnkbuf[0] = '\0';
569 pathlen = 0;
570 getfile(xtrlnkfile, xtrlnkskip);
571 if (pathlen == 0) {
572 vprintf(stdout,
573 "%s: zero length symbolic link (ignored)\n", name);
574 return (GOOD);
575 }
576 if (linkit(lnkbuf, name, SYMLINK) == GOOD) {
577 (void) lchown(name, uid, gid);
578 (void) lchmod(name, mode);
579 (void) lutimes(name, timep);
580 return (GOOD);
581 }
582 return (FAIL);
583
584 case IFIFO:
585 vprintf(stdout, "extract fifo %s\n", name);
586 if (Nflag) {
587 skipfile();
588 return (GOOD);
589 }
590 if (uflag && !Nflag)
591 (void)unlink(name);
592 if (mkfifo(name, mode) < 0) {
593 fprintf(stderr, "%s: cannot create fifo: %s\n",
594 name, strerror(errno));
595 skipfile();
596 return (FAIL);
597 }
598 (void) chown(name, uid, gid);
599 (void) chmod(name, mode);
600 (void) utimes(name, timep);
601 (void) chflags(name, flags);
602 skipfile();
603 return (GOOD);
604
605 case IFCHR:
606 case IFBLK:
607 vprintf(stdout, "extract special file %s\n", name);
608 if (Nflag) {
609 skipfile();
610 return (GOOD);
611 }
612 if (uflag)
613 (void)unlink(name);
614 if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) {
615 fprintf(stderr, "%s: cannot create special file: %s\n",
616 name, strerror(errno));
617 skipfile();
618 return (FAIL);
619 }
620 (void) chown(name, uid, gid);
621 (void) chmod(name, mode);
622 (void) utimes(name, timep);
623 (void) chflags(name, flags);
624 skipfile();
625 return (GOOD);
626
627 case IFREG:
628 vprintf(stdout, "extract file %s\n", name);
629 if (Nflag) {
630 skipfile();
631 return (GOOD);
632 }
633 if (uflag)
634 (void)unlink(name);
635 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC,
636 0666)) < 0) {
637 fprintf(stderr, "%s: cannot create file: %s\n",
638 name, strerror(errno));
639 skipfile();
640 return (FAIL);
641 }
642 (void) fchown(ofile, uid, gid);
643 (void) fchmod(ofile, mode);
644 getfile(xtrfile, xtrskip);
645 (void) close(ofile);
646 utimes(name, timep);
647 (void) chflags(name, flags);
648 return (GOOD);
649 }
650 /* NOTREACHED */
651}
652
653/*
654 * skip over bit maps on the tape
655 */
656void
657skipmaps()
658{
659
660 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
661 skipfile();
662}
663
664/*
665 * skip over a file on the tape
666 */
667void
668skipfile()
669{
670
671 curfile.action = SKIP;
672 getfile(xtrnull, xtrnull);
673}
674
675/*
676 * Extract a file from the tape.
677 * When an allocated block is found it is passed to the fill function;
678 * when an unallocated block (hole) is found, a zeroed buffer is passed
679 * to the skip function.
680 */
681void
682getfile(fill, skip)
683 void (*fill) __P((char *, long));
684 void (*skip) __P((char *, long));
685{
686 register int i;
687 int curblk = 0;
688 quad_t size = spcl.c_dinode.di_size;
689 static char clearedbuf[MAXBSIZE];
690 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
691 char junk[TP_BSIZE];
692
693 if (spcl.c_type == TS_END)
694 panic("ran off end of tape\n");
695 if (spcl.c_magic != NFS_MAGIC)
696 panic("not at beginning of a file\n");
697 if (!gettingfile && setjmp(restart) != 0)
698 return;
699 gettingfile++;
700loop:
701 for (i = 0; i < spcl.c_count; i++) {
702 if (readmapflag || spcl.c_addr[i]) {
703 readtape(&buf[curblk++][0]);
704 if (curblk == fssize / TP_BSIZE) {
705 (*fill)((char *)buf, (long)(size > TP_BSIZE ?
706 fssize : (curblk - 1) * TP_BSIZE + size));
707 curblk = 0;
708 }
709 } else {
710 if (curblk > 0) {
711 (*fill)((char *)buf, (long)(size > TP_BSIZE ?
712 curblk * TP_BSIZE :
713 (curblk - 1) * TP_BSIZE + size));
714 curblk = 0;
715 }
716 (*skip)(clearedbuf, (long)(size > TP_BSIZE ?
717 TP_BSIZE : size));
718 }
719 if ((size -= TP_BSIZE) <= 0) {
720 for (i++; i < spcl.c_count; i++)
721 if (readmapflag || spcl.c_addr[i])
722 readtape(junk);
723 break;
724 }
725 }
726 if (gethead(&spcl) == GOOD && size > 0) {
727 if (spcl.c_type == TS_ADDR)
728 goto loop;
729 dprintf(stdout,
730 "Missing address (header) block for %s at %ld blocks\n",
731 curfile.name, blksread);
732 }
733 if (curblk > 0)
734 (*fill)((char *)buf, (long)((curblk * TP_BSIZE) + size));
735 findinode(&spcl);
736 gettingfile = 0;
737}
738
739/*
740 * Write out the next block of a file.
741 */
742static void
743xtrfile(buf, size)
744 char *buf;
745 long size;
746{
747
748 if (Nflag)
749 return;
750 if (write(ofile, buf, (int) size) == -1) {
751 fprintf(stderr,
752 "write error extracting inode %d, name %s\nwrite: %s\n",
753 curfile.ino, curfile.name, strerror(errno));
754 }
755}
756
757/*
758 * Skip over a hole in a file.
759 */
760/* ARGSUSED */
761static void
762xtrskip(buf, size)
763 char *buf;
764 long size;
765{
766
767 if (lseek(ofile, size, SEEK_CUR) == -1) {
768 fprintf(stderr,
769 "seek error extracting inode %d, name %s\nlseek: %s\n",
770 curfile.ino, curfile.name, strerror(errno));
771 done(1);
772 }
773}
774
775/*
776 * Collect the next block of a symbolic link.
777 */
778static void
779xtrlnkfile(buf, size)
780 char *buf;
781 long size;
782{
783
784 pathlen += size;
785 if (pathlen > MAXPATHLEN) {
786 fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n",
787 curfile.name, lnkbuf, buf, pathlen);
788 done(1);
789 }
790 (void) strcat(lnkbuf, buf);
791}
792
793/*
794 * Skip over a hole in a symbolic link (should never happen).
795 */
796/* ARGSUSED */
797static void
798xtrlnkskip(buf, size)
799 char *buf;
800 long size;
801{
802
803 fprintf(stderr, "unallocated block in symbolic link %s\n",
804 curfile.name);
805 done(1);
806}
807
808/*
809 * Collect the next block of a bit map.
810 */
811static void
812xtrmap(buf, size)
813 char *buf;
814 long size;
815{
816
817 memmove(map, buf, size);
818 map += size;
819}
820
821/*
822 * Skip over a hole in a bit map (should never happen).
823 */
824/* ARGSUSED */
825static void
826xtrmapskip(buf, size)
827 char *buf;
828 long size;
829{
830
831 panic("hole in map\n");
832 map += size;
833}
834
835/*
836 * Noop, when an extraction function is not needed.
837 */
838/* ARGSUSED */
839void
840xtrnull(buf, size)
841 char *buf;
842 long size;
843{
844
845 return;
846}
847
848/*
849 * Read TP_BSIZE blocks from the input.
850 * Handle read errors, and end of media.
851 */
852static void
853readtape(buf)
854 char *buf;
855{
856 long rd, newvol, i;
857 int cnt, seek_failed;
858
859 if (blkcnt < numtrec) {
860 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE);
861 blksread++;
862 tapeaddr++;
863 return;
864 }
865 for (i = 0; i < ntrec; i++)
866 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
867 if (numtrec == 0)
868 numtrec = ntrec;
869 cnt = ntrec * TP_BSIZE;
870 rd = 0;
871getmore:
872#ifdef RRESTORE
873 if (host)
874 i = rmtread(&tapebuf[rd], cnt);
875 else
876#endif
877 i = read(mt, &tapebuf[rd], cnt);
878 /*
879 * Check for mid-tape short read error.
880 * If found, skip rest of buffer and start with the next.
881 */
882 if (!pipein && numtrec < ntrec && i > 0) {
883 dprintf(stdout, "mid-media short read error.\n");
884 numtrec = ntrec;
885 }
886 /*
887 * Handle partial block read.
888 */
889 if (pipein && i == 0 && rd > 0)
890 i = rd;
891 else if (i > 0 && i != ntrec * TP_BSIZE) {
892 if (pipein) {
893 rd += i;
894 cnt -= i;
895 if (cnt > 0)
896 goto getmore;
897 i = rd;
898 } else {
899 /*
900 * Short read. Process the blocks read.
901 */
902 if (i % TP_BSIZE != 0)
903 vprintf(stdout,
904 "partial block read: %ld should be %ld\n",
905 i, ntrec * TP_BSIZE);
906 numtrec = i / TP_BSIZE;
907 }
908 }
909 /*
910 * Handle read error.
911 */
912 if (i < 0) {
913 fprintf(stderr, "Tape read error while ");
914 switch (curfile.action) {
915 default:
916 fprintf(stderr, "trying to set up tape\n");
917 break;
918 case UNKNOWN:
919 fprintf(stderr, "trying to resynchronize\n");
920 break;
921 case USING:
922 fprintf(stderr, "restoring %s\n", curfile.name);
923 break;
924 case SKIP:
925 fprintf(stderr, "skipping over inode %d\n",
926 curfile.ino);
927 break;
928 }
929 if (!yflag && !reply("continue"))
930 done(1);
931 i = ntrec * TP_BSIZE;
932 memset(tapebuf, 0, i);
933#ifdef RRESTORE
934 if (host)
935 seek_failed = (rmtseek(i, 1) < 0);
936 else
937#endif
938 seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1);
939
940 if (seek_failed) {
941 fprintf(stderr,
942 "continuation failed: %s\n", strerror(errno));
943 done(1);
944 }
945 }
946 /*
947 * Handle end of tape.
948 */
949 if (i == 0) {
950 vprintf(stdout, "End-of-tape encountered\n");
951 if (!pipein) {
952 newvol = volno + 1;
953 volno = 0;
954 numtrec = 0;
955 getvol(newvol);
956 readtape(buf);
957 return;
958 }
959 if (rd % TP_BSIZE != 0)
960 panic("partial block read: %d should be %d\n",
961 rd, ntrec * TP_BSIZE);
962 terminateinput();
963 memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE);
964 }
965 blkcnt = 0;
966 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE);
967 blksread++;
968 tapeaddr++;
969}
970
971static void
972findtapeblksize()
973{
974 register long i;
975
976 for (i = 0; i < ntrec; i++)
977 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
978 blkcnt = 0;
979#ifdef RRESTORE
980 if (host)
981 i = rmtread(tapebuf, ntrec * TP_BSIZE);
982 else
983#endif
984 i = read(mt, tapebuf, ntrec * TP_BSIZE);
985
986 if (i <= 0) {
987 fprintf(stderr, "tape read error: %s\n", strerror(errno));
988 done(1);
989 }
990 if (i % TP_BSIZE != 0) {
991 fprintf(stderr, "Tape block size (%ld) %s (%d)\n",
992 i, "is not a multiple of dump block size", TP_BSIZE);
993 done(1);
994 }
995 ntrec = i / TP_BSIZE;
996 numtrec = ntrec;
997 vprintf(stdout, "Tape block size is %ld\n", ntrec);
998}
999
1000void
1001closemt()
1002{
1003
1004 if (mt < 0)
1005 return;
1006#ifdef RRESTORE
1007 if (host)
1008 rmtclose();
1009 else
1010#endif
1011 (void) close(mt);
1012}
1013
1014/*
1015 * Read the next block from the tape.
1016 * Check to see if it is one of several vintage headers.
1017 * If it is an old style header, convert it to a new style header.
1018 * If it is not any valid header, return an error.
1019 */
1020static int
1021gethead(buf)
1022 struct s_spcl *buf;
1023{
1024 long i;
1025 union {
1026 quad_t qval;
1027 int32_t val[2];
1028 } qcvt;
1029 union u_ospcl {
1030 char dummy[TP_BSIZE];
1031 struct s_ospcl {
1032 int32_t c_type;
1033 int32_t c_date;
1034 int32_t c_ddate;
1035 int32_t c_volume;
1036 int32_t c_tapea;
1037 u_short c_inumber;
1038 int32_t c_magic;
1039 int32_t c_checksum;
1040 struct odinode {
1041 unsigned short odi_mode;
1042 u_short odi_nlink;
1043 u_short odi_uid;
1044 u_short odi_gid;
1045 int32_t odi_size;
1046 int32_t odi_rdev;
1047 char odi_addr[36];
1048 int32_t odi_atime;
1049 int32_t odi_mtime;
1050 int32_t odi_ctime;
1051 } c_dinode;
1052 int32_t c_count;
1053 char c_addr[256];
1054 } s_ospcl;
1055 } u_ospcl;
1056
1057 if (!cvtflag) {
1058 readtape((char *)buf);
1059 if (buf->c_magic != NFS_MAGIC) {
1060 if (swabl(buf->c_magic) != NFS_MAGIC)
1061 return (FAIL);
1062 if (!Bcvt) {
1063 vprintf(stdout, "Note: Doing Byte swapping\n");
1064 Bcvt = 1;
1065 }
1066 }
1067 if (checksum((int *)buf) == FAIL)
1068 return (FAIL);
1069 if (Bcvt) {
1070 swabst((u_char *)"8l4s31l", (u_char *)buf);
1071 swabst((u_char *)"l",(u_char *) &buf->c_level);
1072 swabst((u_char *)"2l",(u_char *) &buf->c_flags);
1073 }
1074 goto good;
1075 }
1076 readtape((char *)(&u_ospcl.s_ospcl));
1077 memset(buf, 0, (long)TP_BSIZE);
1078 buf->c_type = u_ospcl.s_ospcl.c_type;
1079 buf->c_date = u_ospcl.s_ospcl.c_date;
1080 buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
1081 buf->c_volume = u_ospcl.s_ospcl.c_volume;
1082 buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
1083 buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
1084 buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
1085 buf->c_magic = u_ospcl.s_ospcl.c_magic;
1086 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
1087 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
1088 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
1089 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
1090 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
1091 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
1092 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
1093 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
1094 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
1095 buf->c_count = u_ospcl.s_ospcl.c_count;
1096 memmove(buf->c_addr, u_ospcl.s_ospcl.c_addr, (long)256);
1097 if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC ||
1098 checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
1099 return(FAIL);
1100 buf->c_magic = NFS_MAGIC;
1101
1102good:
1103 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
1104 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
1105 qcvt.qval = buf->c_dinode.di_size;
1106 if (qcvt.val[0] || qcvt.val[1]) {
1107 printf("Note: Doing Quad swapping\n");
1108 Qcvt = 1;
1109 }
1110 }
1111 if (Qcvt) {
1112 qcvt.qval = buf->c_dinode.di_size;
1113 i = qcvt.val[1];
1114 qcvt.val[1] = qcvt.val[0];
1115 qcvt.val[0] = i;
1116 buf->c_dinode.di_size = qcvt.qval;
1117 }
1118 readmapflag = 0;
1119
1120 switch (buf->c_type) {
1121
1122 case TS_CLRI:
1123 case TS_BITS:
1124 /*
1125 * Have to patch up missing information in bit map headers
1126 */
1127 buf->c_inumber = 0;
1128 buf->c_dinode.di_size = buf->c_count * TP_BSIZE;
1129 if (buf->c_count > TP_NINDIR)
1130 readmapflag = 1;
1131 else
1132 for (i = 0; i < buf->c_count; i++)
1133 buf->c_addr[i]++;
1134 break;
1135
1136 case TS_TAPE:
1137 if ((buf->c_flags & DR_NEWINODEFMT) == 0)
1138 oldinofmt = 1;
1139 /* fall through */
1140 case TS_END:
1141 buf->c_inumber = 0;
1142 break;
1143
1144 case TS_INODE:
1145 case TS_ADDR:
1146 break;
1147
1148 default:
1149 panic("gethead: unknown inode type %d\n", buf->c_type);
1150 break;
1151 }
1152 /*
1153 * If we are restoring a filesystem with old format inodes,
1154 * copy the uid/gid to the new location.
1155 */
1156 if (oldinofmt) {
1157 buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
1158 buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
1159 }
1160 tapeaddr = buf->c_tapea;
1161 if (dflag)
1162 accthdr(buf);
1163 return(GOOD);
1164}
1165
1166/*
1167 * Check that a header is where it belongs and predict the next header
1168 */
1169static void
1170accthdr(header)
1171 struct s_spcl *header;
1172{
1173 static ino_t previno = 0x7fffffff;
1174 static int prevtype;
1175 static long predict;
1176 long blks, i;
1177
1178 if (header->c_type == TS_TAPE) {
1179 fprintf(stderr, "Volume header (%s inode format) ",
1180 oldinofmt ? "old" : "new");
1181 if (header->c_firstrec)
1182 fprintf(stderr, "begins with record %ld",
1183 header->c_firstrec);
1184 fprintf(stderr, "\n");
1185 previno = 0x7fffffff;
1186 return;
1187 }
1188 if (previno == 0x7fffffff)
1189 goto newcalc;
1190 switch (prevtype) {
1191 case TS_BITS:
1192 fprintf(stderr, "Dumped inodes map header");
1193 break;
1194 case TS_CLRI:
1195 fprintf(stderr, "Used inodes map header");
1196 break;
1197 case TS_INODE:
1198 fprintf(stderr, "File header, ino %d", previno);
1199 break;
1200 case TS_ADDR:
1201 fprintf(stderr, "File continuation header, ino %d", previno);
1202 break;
1203 case TS_END:
1204 fprintf(stderr, "End of tape header");
1205 break;
1206 }
1207 if (predict != blksread - 1)
1208 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
1209 predict, blksread - 1);
1210 fprintf(stderr, "\n");
1211newcalc:
1212 blks = 0;
1213 if (header->c_type != TS_END)
1214 for (i = 0; i < header->c_count; i++)
1215 if (readmapflag || header->c_addr[i] != 0)
1216 blks++;
1217 predict = blks;
1218 blksread = 0;
1219 prevtype = header->c_type;
1220 previno = header->c_inumber;
1221}
1222
1223/*
1224 * Find an inode header.
1225 * Complain if had to skip.
1226 */
1227static void
1228findinode(header)
1229 struct s_spcl *header;
1230{
1231 static long skipcnt = 0;
1232 long i;
1233 char buf[TP_BSIZE];
1234 int htype;
1235
1236 curfile.name = "<name unknown>";
1237 curfile.action = UNKNOWN;
1238 curfile.dip = NULL;
1239 curfile.ino = 0;
1240 do {
1241 if (header->c_magic != NFS_MAGIC) {
1242 skipcnt++;
1243 while (gethead(header) == FAIL ||
1244 header->c_date != dumpdate)
1245 skipcnt++;
1246 }
1247 htype = header->c_type;
1248 switch (htype) {
1249
1250 case TS_ADDR:
1251 /*
1252 * Skip up to the beginning of the next record
1253 */
1254 for (i = 0; i < header->c_count; i++)
1255 if (header->c_addr[i])
1256 readtape(buf);
1257 while (gethead(header) == FAIL ||
1258 header->c_date != dumpdate)
1259 skipcnt++;
1260 break;
1261
1262 case TS_INODE:
1263 curfile.dip = &header->c_dinode;
1264 curfile.ino = header->c_inumber;
1265 break;
1266
1267 case TS_END:
1268 /* If we missed some tapes, get another volume. */
1269 if (tapesread & (tapesread + 1)) {
1270 getvol(0);
1271 continue;
1272 }
1273 curfile.ino = maxino;
1274 break;
1275
1276 case TS_CLRI:
1277 curfile.name = "<file removal list>";
1278 break;
1279
1280 case TS_BITS:
1281 curfile.name = "<file dump list>";
1282 break;
1283
1284 case TS_TAPE:
1285 panic("unexpected tape header\n");
1286 /* NOTREACHED */
1287
1288 default:
1289 panic("unknown tape header type %d\n", spcl.c_type);
1290 /* NOTREACHED */
1291
1292 }
1293 } while (htype == TS_ADDR);
1294 if (skipcnt > 0)
1295 fprintf(stderr, "resync restore, skipped %ld blocks\n",
1296 skipcnt);
1297 skipcnt = 0;
1298}
1299
1300static int
1301checksum(buf)
1302 register int *buf;
1303{
1304 register int i, j;
1305
1306 j = sizeof(union u_spcl) / sizeof(int);
1307 i = 0;
1308 if(!Bcvt) {
1309 do
1310 i += *buf++;
1311 while (--j);
1312 } else {
1313 /* What happens if we want to read restore tapes
1314 for a 16bit int machine??? */
1315 do
1316 i += swabl(*buf++);
1317 while (--j);
1318 }
1319
1320 if (i != CHECKSUM) {
1321 fprintf(stderr, "Checksum error %o, inode %d file %s\n", i,
1322 curfile.ino, curfile.name);
1323 return(FAIL);
1324 }
1325 return(GOOD);
1326}
1327
1328#ifdef RRESTORE
1329#if __STDC__
1330#include <stdarg.h>
1331#else
1332#include <varargs.h>
1333#endif
1334
1335void
1336#if __STDC__
1337msg(const char *fmt, ...)
1338#else
1339msg(fmt, va_alist)
1340 char *fmt;
1341 va_dcl
1342#endif
1343{
1344 va_list ap;
1345#if __STDC__
1346 va_start(ap, fmt);
1347#else
1348 va_start(ap);
1349#endif
1350 (void)vfprintf(stderr, fmt, ap);
1351 va_end(ap);
1352}
1353#endif /* RRESTORE */
1354
1355static u_char *
1356swabshort(sp, n)
1357 register u_char *sp;
1358 register int n;
1359{
1360 char c;
1361
1362 while (--n >= 0) {
1363 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
1364 sp += 2;
1365 }
1366 return (sp);
1367}
1368
1369static u_char *
1370swablong(sp, n)
1371 register u_char *sp;
1372 register int n;
1373{
1374 char c;
1375
1376 while (--n >= 0) {
1377 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
1378 c = sp[2]; sp[2] = sp[1]; sp[1] = c;
1379 sp += 4;
1380 }
1381 return (sp);
1382}
1383
1384void
1385swabst(cp, sp)
1386 register u_char *cp, *sp;
1387{
1388 int n = 0;
1389
1390 while (*cp) {
1391 switch (*cp) {
1392 case '0': case '1': case '2': case '3': case '4':
1393 case '5': case '6': case '7': case '8': case '9':
1394 n = (n * 10) + (*cp++ - '0');
1395 continue;
1396
1397 case 's': case 'w': case 'h':
1398 if (n == 0)
1399 n = 1;
1400 sp = swabshort(sp, n);
1401 break;
1402
1403 case 'l':
1404 if (n == 0)
1405 n = 1;
1406 sp = swablong(sp, n);
1407 break;
1408
1409 default: /* Any other character, like 'b' counts as byte. */
1410 if (n == 0)
1411 n = 1;
1412 sp += n;
1413 break;
1414 }
1415 cp++;
1416 n = 0;
1417 }
1418}
1419
1420static u_long
1421swabl(x)
1422 u_long x;
1423{
1424 swabst((u_char *)"l", (u_char *)&x);
1425 return (x);
1426}