]>
git.wh0rd.org - dump.git/blob - restore/tape.c
2bb447239bed286d20afbe0de2cb57f2afdf7215
2 * Ported to Linux's Second Extended File System as part of the
3 * dump and restore backup suit
4 * Remy Card <card@Linux.EU.Org>, 1994-1997
5 * Stelian Pop <stelian@popies.net>, 1999-2000
6 * Stelian Pop <stelian@popies.net> - AlcĂ´ve <www.alcove.com>, 2000-2002
10 * Copyright (c) 1983, 1993
11 * The Regents of the University of California. All rights reserved.
12 * (c) UNIX System Laboratories, Inc.
13 * All or some portions of this file are derived from material licensed
14 * to the University of California by American Telephone and Telegraph
15 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
16 * the permission of UNIX System Laboratories, Inc.
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution.
26 * 3. All advertising materials mentioning features or use of this software
27 * must display the following acknowledgement:
28 * This product includes software developed by the University of
29 * California, Berkeley and its contributors.
30 * 4. Neither the name of the University nor the names of its contributors
31 * may be used to endorse or promote products derived from this software
32 * without specific prior written permission.
34 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 static const char rcsid
[] =
49 "$Id: tape.c,v 1.67 2003/01/10 14:42:51 stelian Exp $";
53 #include <compatlfs.h>
55 #include <compaterr.h>
63 #include <sys/param.h>
71 #ifdef HAVE_EXT2FS_EXT2_FS_H
72 #include <ext2fs/ext2_fs.h>
74 #include <linux/ext2_fs.h>
76 #include <ext2fs/ext2fs.h>
77 #include <bsdcompat.h>
79 #include <ufs/ufs/dinode.h>
80 #endif /* __linux__ */
81 #include <protocols/dumprestore.h>
85 #endif /* HAVE_ZLIB */
89 #endif /* HAVE_BZLIB */
93 #include "pathnames.h"
98 static long fssize
= MAXBSIZE
;
101 static int magtapein
= 0; /* input is from magtape */
102 static char magtape
[MAXPATHLEN
];
103 static char magtapeprefix
[MAXPATHLEN
];
106 static char *tapebuf
; /* input buffer for read */
107 static int bufsize
; /* buffer size without prefix */
108 static char *tbufptr
= NULL
; /* active tape buffer */
109 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
110 static char *comprbuf
; /* uncompress work buf */
111 static size_t comprlen
; /* size including prefix */
113 static union u_spcl endoftapemark
;
114 static long blksread
; /* blocks read since last header */
115 static long tpblksread
= 0; /* TP_BSIZE blocks read */
116 static long tapesread
;
117 static sigjmp_buf restart
;
118 static int gettingfile
= 0; /* restart has a valid frame */
123 static char lnkbuf
[MAXPATHLEN
+ 1];
126 int oldinofmt
; /* old inode format conversion required */
127 int Bcvt
; /* Swap Bytes (for CCI or sun) */
128 static int Qcvt
; /* Swap quads (for sun) */
130 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
132 static void accthdr
__P((struct s_spcl
*));
133 static int checksum
__P((int *));
134 static void findinode
__P((struct s_spcl
*));
135 static void findtapeblksize
__P((void));
136 static int gethead
__P((struct s_spcl
*));
137 static int converthead
__P((struct s_spcl
*));
138 static void converttapebuf
__P((struct tapebuf
*));
139 static void readtape
__P((char *));
140 static void setdumpnum
__P((void));
141 static u_int swabi
__P((u_int
));
143 static u_long swabl
__P((u_long
));
145 static u_char
*swab64
__P((u_char
*, int));
146 static u_char
*swab32
__P((u_char
*, int));
147 static u_char
*swab16
__P((u_char
*, int));
148 static void terminateinput
__P((void));
149 static void xtrfile
__P((char *, size_t));
150 static void xtrlnkfile
__P((char *, size_t));
151 static void xtrlnkskip
__P((char *, size_t));
152 static void xtrmap
__P((char *, size_t));
153 static void xtrmapskip
__P((char *, size_t));
154 static void xtrskip
__P((char *, size_t));
155 static void setmagtapein
__P((void));
157 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
158 static void newcomprbuf
__P((int));
159 static void (*readtape_func
) __P((char *));
160 static void readtape_set
__P((char *));
161 static void readtape_uncompr
__P((char *));
162 static void readtape_comprfile
__P((char *));
163 static void readtape_comprtape
__P((char *));
164 static char *decompress_tapebuf
__P((struct tapebuf
*, int));
165 static void msg_read_error
__P((char *));
167 static int read_a_block
__P((int, char *, size_t, long *));
168 #define PREFIXSIZE sizeof(struct tapebuf)
170 #define COMPARE_ONTHEFLY 1
173 static int ifile
; /* input file for compare */
174 static int cmperror
; /* compare error */
175 static void xtrcmpfile
__P((char *, size_t));
176 static void xtrcmpskip
__P((char *, size_t));
179 static int readmapflag
;
180 static int readingmaps
; /* set to 1 while reading the maps */
183 * Set up an input source. This is called from main.c before setup() is.
186 setinput(char *source
)
192 newtapebuf(NTREC
> HIGHDENSITYTREC
? NTREC
: HIGHDENSITYTREC
);
196 if (strchr(source
, ':')) {
198 source
= strchr(host
, ':');
200 if (rmthost(host
) == 0)
204 if (strcmp(source
, "-") == 0) {
206 * Since input is coming from a pipe we must establish
207 * our own connection to the terminal.
209 terminal
= fopen(_PATH_TTY
, "r");
210 if (terminal
== NULL
) {
211 warn("cannot open %s", _PATH_TTY
);
212 terminal
= fopen(_PATH_DEVNULL
, "r");
213 if (terminal
== NULL
)
214 err(1, "cannot open %s", _PATH_DEVNULL
);
218 setuid(getuid()); /* no longer need or want root privileges */
220 strncpy(magtapeprefix
, source
, MAXPATHLEN
);
221 magtapeprefix
[MAXPATHLEN
-1] = '\0';
222 snprintf(magtape
, MAXPATHLEN
, "%s%03d", source
, 1);
225 strncpy(magtape
, source
, MAXPATHLEN
);
226 magtape
[MAXPATHLEN
- 1] = '\0';
230 newtapebuf(long size
)
232 static int tapebufsize
= -1;
235 bufsize
= ntrec
* TP_BSIZE
;
236 if (size
<= tapebufsize
)
240 tapebuf
= malloc(size
* TP_BSIZE
+ sizeof(struct tapebuf
));
242 errx(1, "Cannot allocate space for tape buffer");
246 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
248 newcomprbuf(int size
)
250 size_t buf_size
= (size
+1) * TP_BSIZE
+ sizeof(struct tapebuf
);
251 if (buf_size
<= comprlen
)
254 if (comprbuf
!= NULL
)
256 comprbuf
= malloc(comprlen
);
257 if (comprbuf
== NULL
)
258 errx(1, "Cannot allocate space for decompress buffer");
260 #endif /* HAVE_ZLIB || HAVE_BZLIB */
263 * Verify that the tape drive can be accessed and
264 * that it actually is a dump tape.
269 int i
, j
, *ip
, bot_code
;
273 Vprintf(stdout
, "Verify tape and initialize maps\n");
274 if (Afile
== NULL
&& bot_script
) {
275 msg("Launching %s\n", bot_script
);
276 bot_code
= system_command(bot_script
, magtape
, 1);
277 if (bot_code
!= 0 && bot_code
!= 1) {
278 msg("Restore aborted by the beginning of tape script\n");
290 mt
= rmtopen(temptape
, O_RDONLY
);
296 mt
= OPEN(temptape
, O_RDONLY
, 0);
298 err(1, "%s", magtape
);
304 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
305 readtape_func
= readtape_set
;
309 if (gethead(&spcl
) == FAIL
) {
310 blkcnt
--; /* push back this block */
314 if (gethead(&spcl
) == FAIL
)
315 errx(1, "Tape is not a dump tape");
316 fprintf(stderr
, "Converting to new file system format.\n");
320 fprintf(stderr
, "Dump tape is compressed.\n");
321 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB)
322 errx(1,"This restore version doesn't support decompression");
323 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
326 endoftapemark
.s_spcl
.c_magic
= cvtflag
? OFS_MAGIC
: NFS_MAGIC
;
327 endoftapemark
.s_spcl
.c_type
= TS_END
;
328 ip
= (int *)&endoftapemark
;
329 j
= sizeof(union u_spcl
) / sizeof(int);
334 endoftapemark
.s_spcl
.c_checksum
= CHECKSUM
- i
;
336 if (vflag
|| command
== 't' || command
== 'C')
339 if (tapeposflag
&& (unsigned long)spcl
.c_date
!= qfadumpdate
)
340 errx(1, "different QFA/dumpdates detected\n");
342 if (filesys
[0] == '\0') {
344 strncpy(filesys
, spcl
.c_filesys
, NAMELEN
);
345 filesys
[NAMELEN
- 1] = '\0';
346 dirptr
= strstr(filesys
, " (dir");
350 dumptime
= spcl
.c_ddate
;
351 dumpdate
= spcl
.c_date
;
352 if (STAT(".", &stbuf
) < 0)
353 err(1, "cannot stat .");
354 if (stbuf
.st_blksize
> 0 && stbuf
.st_blksize
< TP_BSIZE
)
356 if (stbuf
.st_blksize
>= TP_BSIZE
&& stbuf
.st_blksize
<= MAXBSIZE
)
357 fssize
= stbuf
.st_blksize
;
358 if (((fssize
- 1) & fssize
) != 0)
359 errx(1, "bad block size %ld", fssize
);
360 if (spcl
.c_volume
!= 1)
361 errx(1, "Tape is not volume 1 of the dump");
362 if (gethead(&spcl
) == FAIL
) {
363 Dprintf(stdout
, "header read failed at %ld blocks\n", (long)blksread
);
364 panic("no header after volume mark!\n");
368 if (spcl
.c_type
!= TS_CLRI
)
369 errx(1, "Cannot find file removal list");
370 maxino
= (spcl
.c_count
* TP_BSIZE
* NBBY
) + 1;
371 map
= calloc((unsigned)1, (unsigned)howmany(maxino
, NBBY
));
373 errx(1, "no memory for active inode map");
375 curfile
.action
= USING
;
376 getfile(xtrmap
, xtrmapskip
);
377 while (spcl
.c_type
== TS_ADDR
) {
378 /* Recompute maxino and the map */
379 dump_ino_t oldmaxino
= maxino
;
380 maxino
+= (spcl
.c_count
* TP_BSIZE
* NBBY
) + 1;
381 resizemaps(oldmaxino
, maxino
);
383 spcl
.c_dinode
.di_size
= spcl
.c_count
* TP_BSIZE
;
384 getfile(xtrmap
, xtrmapskip
);
386 Dprintf(stdout
, "maxino = %lu\n", (unsigned long)maxino
);
387 if (spcl
.c_type
!= TS_BITS
)
388 errx(1, "Cannot find file dump list");
389 map
= calloc((unsigned)1, (unsigned)howmany(maxino
, NBBY
));
390 if (map
== (char *)NULL
)
391 errx(1, "no memory for file dump list");
393 curfile
.action
= USING
;
394 getfile(xtrmap
, xtrmapskip
);
395 while (spcl
.c_type
== TS_ADDR
) {
396 spcl
.c_dinode
.di_size
= spcl
.c_count
* TP_BSIZE
;
397 getfile(xtrmap
, xtrmapskip
);
400 * If there may be whiteout entries on the tape, pretend that the
401 * whiteout inode exists, so that the whiteout entries can be
405 SETINO(WINO
, dumpmap
);
411 * Prompt user to load a new dump volume.
412 * "Nextvol" is the next suggested volume to use.
413 * This suggested volume is enforced when doing full
414 * or incremental restores, but can be overridden by
415 * the user when only extracting a subset of the files.
420 long newvol
= 0, wantnext
= 0, i
;
421 long saved_blksread
= 0, saved_tpblksread
= 0;
422 union u_spcl tmpspcl
;
423 # define tmpbuf tmpspcl.s_spcl
425 int haderror
= 0, bot_code
= 1;
435 panic("Changing volumes on pipe input?\n");
440 saved_blksread
= blksread
;
441 saved_tpblksread
= tpblksread
;
442 #if defined(USE_QFA) && defined(sunos)
443 if (createtapeposflag
|| tapeposflag
)
448 exit(1); /* pipes do not get a second chance */
449 if (aflag
|| curfile
.action
!= SKIP
) {
456 while (newvol
<= 0) {
457 if (tapesread
== 0) {
458 fprintf(stderr
, "%s%s%s%s%s",
459 "You have not read any volumes yet.\n",
460 "Unless you know which volume your",
461 " file(s) are on you should start\n",
462 "with the last volume and work",
463 " towards the first.\n");
465 fprintf(stderr
, "You have read volumes");
467 for (i
= 1; i
< 32; i
++)
468 if (tapesread
& (1 << i
)) {
469 fprintf(stderr
, "%s%ld", buf
, (long)i
);
472 fprintf(stderr
, "\n");
475 fprintf(stderr
, "Specify next volume # (none if no more volumes): ");
476 (void) fflush(stderr
);
477 (void) fgets(buf
, TP_BSIZE
, terminal
);
478 } while (!feof(terminal
) && buf
[0] == '\n');
481 if (!strcmp(buf
, "none\n")) {
488 "Volume numbers are positive numerics\n");
491 if (newvol
== volno
) {
492 tapesread
|= 1 << volno
;
493 #if defined(USE_QFA) && defined(sunos)
494 if (createtapeposflag
|| tapeposflag
) {
495 if (OpenSMTCmt(magtape
) < 0) {
506 snprintf(magtape
, MAXPATHLEN
, "%s%03ld", magtapeprefix
, newvol
);
507 magtape
[MAXPATHLEN
- 1] = '\0';
509 if (bot_script
&& !haderror
) {
510 msg("Launching %s\n", bot_script
);
511 bot_code
= system_command(bot_script
, magtape
, newvol
);
512 if (bot_code
!= 0 && bot_code
!= 1) {
513 msg("Restore aborted by the beginning of tape script\n");
517 if (haderror
|| (bot_code
&& !Mflag
)) {
519 fprintf(stderr
, "Mount volume %ld\n", (long)newvol
);
520 fprintf(stderr
, "Enter ``none'' if there are no more volumes\n");
521 fprintf(stderr
, "otherwise enter volume name (default: %s) ", magtape
);
522 (void) fflush(stderr
);
523 (void) fgets(buf
, TP_BSIZE
, terminal
);
526 if (!strcmp(buf
, "none\n")) {
530 if (buf
[0] != '\n') {
532 (void) strncpy(magtape
, buf
, sizeof(magtape
));
533 magtape
[sizeof(magtape
) - 1] = '\0';
534 if ((pos
= strchr(magtape
, '\n')))
535 magtape
[pos
- magtape
] = '\0';
540 mt
= rmtopen(magtape
, O_RDONLY
);
543 mt
= OPEN(magtape
, O_RDONLY
, 0);
546 fprintf(stderr
, "Cannot open %s\n", magtape
);
553 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
554 readtape_func
= readtape_set
;
560 if (gethead(&tmpbuf
) == FAIL
) {
561 Dprintf(stdout
, "header read failed at %ld blocks\n", (long)blksread
);
562 fprintf(stderr
, "tape is not dump tape\n");
565 blksread
= saved_blksread
;
566 tpblksread
= saved_tpblksread
;
569 if (tmpbuf
.c_volume
!= volno
) {
570 fprintf(stderr
, "Wrong volume (%d)\n", tmpbuf
.c_volume
);
573 blksread
= saved_blksread
;
574 tpblksread
= saved_tpblksread
;
577 if (tmpbuf
.c_date
!= dumpdate
|| tmpbuf
.c_ddate
!= dumptime
) {
578 fprintf(stderr
, "Wrong dump date\n\tgot: %s",
579 ctime4(&tmpbuf
.c_date
));
580 fprintf(stderr
, "\twanted: %s", ctime(&dumpdate
));
583 blksread
= saved_blksread
;
584 tpblksread
= saved_tpblksread
;
587 tapesread
|= 1 << volno
;
589 * If continuing from the previous volume, skip over any
590 * blocks read already at the end of the previous volume.
592 * If coming to this volume at random, skip to the beginning
593 * of the next record.
596 fprintf(stderr
, "Dump tape is compressed.\n");
597 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB)
598 errx(1,"This restore version doesn't support decompression");
599 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
601 Dprintf(stdout
, "read %ld recs, tape starts with %ld\n",
602 tpblksread
- 1, (long)tmpbuf
.c_firstrec
);
603 if (tmpbuf
.c_type
== TS_TAPE
&& (tmpbuf
.c_flags
& DR_NEWHEADER
)) {
605 tpblksread
= tmpbuf
.c_firstrec
+ 1;
606 for (i
= tmpbuf
.c_count
; i
> 0; i
--)
608 } else if (tmpbuf
.c_firstrec
> 0 &&
609 tmpbuf
.c_firstrec
< tpblksread
- 1) {
611 * -1 since we've read the volume header
613 i
= tpblksread
- tmpbuf
.c_firstrec
- 1;
614 Dprintf(stderr
, "Skipping %ld duplicate record%s.\n",
615 (long)i
, i
> 1 ? "s" : "");
620 if (curfile
.action
== USING
) {
622 panic("active file into volume 1\n");
626 * Skip up to the beginning of the next record
628 if (tmpbuf
.c_type
== TS_TAPE
&& (tmpbuf
.c_flags
& DR_NEWHEADER
))
629 for (i
= tmpbuf
.c_count
; i
> 0; i
--)
631 (void) gethead(&spcl
);
635 siglongjmp(restart
, 1);
640 * Handle unexpected EOF.
646 if (gettingfile
&& curfile
.action
== USING
) {
647 printf("Warning: %s %s\n",
648 "End-of-input encountered while extracting", curfile
.name
);
650 curfile
.name
= "<name unknown>";
651 curfile
.action
= UNKNOWN
;
653 curfile
.ino
= maxino
;
656 siglongjmp(restart
, 1);
661 * handle multiple dumps per tape by skipping forward to the
669 if (dumpnum
== 1 || volno
!= 1)
672 errx(1, "Cannot have multiple dumps on pipe input");
674 tcom
.mt_count
= dumpnum
- 1;
677 rmtioctl(MTFSF
, dumpnum
- 1);
680 if (ioctl(mt
, (int)MTIOCTOP
, (char *)&tcom
) < 0)
687 fprintf(stdout
, "Dump date: %s", ctime4(&spcl
.c_date
));
688 fprintf(stdout
, "Dumped from: %s",
689 (spcl
.c_ddate
== 0) ? "the epoch\n" : ctime4(&spcl
.c_ddate
));
690 if (spcl
.c_host
[0] == '\0')
692 fprintf(stdout
, "Level %d dump of %s on %s:%s\n",
693 spcl
.c_level
, spcl
.c_filesys
, spcl
.c_host
, spcl
.c_dev
);
694 fprintf(stdout
, "Label: %s\n", spcl
.c_label
);
702 if (volinfo
[1] == ROOTINO
) {
703 printf("Starting inode numbers by volume:\n");
704 for (i
= 1; i
< (int)TP_NINOS
&& volinfo
[i
] != 0; ++i
)
705 printf("\tVolume %d: %lu\n", i
, (unsigned long)volinfo
[i
]);
711 time_t tv_sec
; /* seconds */
712 suseconds_t tv_usec
; /* and microseconds */
717 extractfile(struct entry
*ep
, int doremove
)
721 struct timeval timep
[2];
722 char *name
= myname(ep
);
724 /* If removal is requested (-r mode) do remove it unless
725 * we are extracting a metadata only inode */
726 if (spcl
.c_flags
& DR_METAONLY
) {
727 Vprintf(stdout
, "file %s is metadata only\n", name
);
732 ep
->e_flags
&= ~REMOVED
;
737 curfile
.action
= USING
;
738 #if defined(__linux__) || defined(sunos)
739 timep
[0].tv_sec
= curfile
.dip
->di_atime
.tv_sec
;
740 timep
[0].tv_usec
= curfile
.dip
->di_atime
.tv_usec
;
741 timep
[1].tv_sec
= curfile
.dip
->di_mtime
.tv_sec
;
742 timep
[1].tv_usec
= curfile
.dip
->di_mtime
.tv_usec
;
743 #else /* __linux__ || sunos */
744 timep
[0].tv_sec
= curfile
.dip
->di_atime
;
745 timep
[0].tv_usec
= curfile
.dip
->di_atimensec
/ 1000;
746 timep
[1].tv_sec
= curfile
.dip
->di_mtime
;
747 timep
[1].tv_usec
= curfile
.dip
->di_mtimensec
/ 1000;
748 #endif /* __linux__ */
749 mode
= curfile
.dip
->di_mode
;
750 flags
= curfile
.dip
->di_flags
;
751 switch (mode
& IFMT
) {
754 fprintf(stderr
, "%s: unknown file mode 0%o\n", name
, mode
);
759 Vprintf(stdout
, "skipped socket %s\n", name
);
765 if (ep
== NULL
|| ep
->e_flags
& EXTRACT
)
766 panic("unextracted directory %s\n", name
);
770 Vprintf(stdout
, "extract file %s\n", name
);
771 return (genliteraldir(name
, curfile
.ino
));
776 uid_t luid
= curfile
.dip
->di_uid
;
777 gid_t lgid
= curfile
.dip
->di_gid
;
779 if (! (spcl
.c_flags
& DR_METAONLY
)) {
782 getfile(xtrlnkfile
, xtrlnkskip
);
785 "%s: zero length symbolic link (ignored)\n", name
);
788 if (linkit(lnkbuf
, name
, SYMLINK
) == FAIL
)
795 (void) lchown(name
, luid
, lgid
);
801 Vprintf(stdout
, "extract fifo %s\n", name
);
806 if (! (spcl
.c_flags
& DR_METAONLY
)) {
809 if (mkfifo(name
, mode
) < 0) {
810 warn("%s: cannot create fifo", name
);
815 (void) chown(name
, curfile
.dip
->di_uid
, curfile
.dip
->di_gid
);
816 (void) chmod(name
, mode
);
819 (void) fsetflags(name
, flags
);
821 (void) chflags(name
, flags
);
829 Vprintf(stdout
, "extract special file %s\n", name
);
834 if (! (spcl
.c_flags
& DR_METAONLY
)) {
837 if (mknod(name
, mode
, (int)curfile
.dip
->di_rdev
) < 0) {
838 warn("%s: cannot create special file", name
);
843 (void) chown(name
, curfile
.dip
->di_uid
, curfile
.dip
->di_gid
);
844 (void) chmod(name
, mode
);
848 warn("%s: fsetflags called on a special file", name
);
849 (void) fsetflags(name
, flags
);
852 (void) chflags(name
, flags
);
860 uid_t luid
= curfile
.dip
->di_uid
;
861 gid_t lgid
= curfile
.dip
->di_gid
;
863 Vprintf(stdout
, "extract file %s\n", name
);
868 if (! (spcl
.c_flags
& DR_METAONLY
)) {
871 if ((ofile
= OPEN(name
, O_WRONLY
| O_CREAT
| O_TRUNC
,
873 warn("%s: cannot create file", name
);
877 getfile(xtrfile
, xtrskip
);
882 (void) chown(name
, luid
, lgid
);
883 (void) chmod(name
, mode
);
886 (void) fsetflags(name
, flags
);
888 (void) chflags(name
, flags
);
898 * skip over bit maps on the tape
904 while (spcl
.c_type
== TS_BITS
|| spcl
.c_type
== TS_CLRI
)
909 * skip over a file on the tape
915 curfile
.action
= SKIP
;
916 getfile(xtrnull
, xtrnull
);
920 * Extract a file from the tape.
921 * When an allocated block is found it is passed to the fill function;
922 * when an unallocated block (hole) is found, a zeroed buffer is passed
923 * to the skip function.
926 getfile(void (*fill
) __P((char *, size_t)), void (*skip
) __P((char *, size_t)))
929 volatile int curblk
= 0;
930 volatile quad_t size
= spcl
.c_dinode
.di_size
;
931 volatile int last_write_was_hole
= 0;
932 quad_t origsize
= size
;
933 static char clearedbuf
[MAXBSIZE
];
934 char buf
[MAXBSIZE
/ TP_BSIZE
][TP_BSIZE
];
937 if (spcl
.c_type
== TS_END
)
938 panic("ran off end of tape\n");
939 if (spcl
.c_magic
!= NFS_MAGIC
)
940 panic("not at beginning of a file\n");
941 if (!gettingfile
&& setjmp(restart
) != 0)
945 for (i
= 0; i
< spcl
.c_count
; i
++) {
946 if (readmapflag
|| spcl
.c_addr
[i
]) {
947 readtape(&buf
[curblk
++][0]);
948 if (curblk
== fssize
/ TP_BSIZE
) {
949 (*fill
)((char *)buf
, (size_t)(size
> TP_BSIZE
?
950 fssize
: (curblk
- 1) * TP_BSIZE
+ size
));
952 last_write_was_hole
= 0;
956 (*fill
)((char *)buf
, (size_t)(size
> TP_BSIZE
?
958 (curblk
- 1) * TP_BSIZE
+ size
));
961 (*skip
)(clearedbuf
, (long)(size
> TP_BSIZE
?
963 last_write_was_hole
= 1;
965 if ((size
-= TP_BSIZE
) <= 0) {
966 for (i
++; i
< spcl
.c_count
; i
++)
967 if (readmapflag
|| spcl
.c_addr
[i
])
972 if (gethead(&spcl
) == GOOD
&& size
> 0) {
973 if (spcl
.c_type
== TS_ADDR
)
976 "Missing address (header) block for %s at %ld blocks\n",
977 curfile
.name
, (long)blksread
);
980 (*fill
)((char *)buf
, (size_t)((curblk
* TP_BSIZE
) + size
));
981 last_write_was_hole
= 0;
984 fprintf(stderr
, "Missing blocks at the end of %s, assuming hole\n", curfile
.name
);
986 size_t skp
= size
> TP_BSIZE
? TP_BSIZE
: size
;
987 (*skip
)(clearedbuf
, skp
);
990 last_write_was_hole
= 1;
992 if (last_write_was_hole
) {
993 FTRUNCATE(ofile
, origsize
);
1001 * Write out the next block of a file.
1004 xtrfile(char *buf
, size_t size
)
1009 if (write(ofile
, buf
, (int) size
) == -1)
1010 err(1, "write error extracting inode %lu, name %s\nwrite",
1011 (unsigned long)curfile
.ino
, curfile
.name
);
1015 * Skip over a hole in a file.
1019 xtrskip(UNUSED(char *buf
), size_t size
)
1022 if (LSEEK(ofile
, (OFF_T
)size
, SEEK_CUR
) == -1)
1023 err(1, "seek error extracting inode %lu, name %s\nlseek",
1024 (unsigned long)curfile
.ino
, curfile
.name
);
1028 * Collect the next block of a symbolic link.
1031 xtrlnkfile(char *buf
, size_t size
)
1035 if (pathlen
> MAXPATHLEN
)
1036 errx(1, "symbolic link name: %s->%s%s; too long %d",
1037 curfile
.name
, lnkbuf
, buf
, pathlen
);
1038 (void) strcat(lnkbuf
, buf
);
1042 * Skip over a hole in a symbolic link (should never happen).
1046 xtrlnkskip(UNUSED(char *buf
), UNUSED(size_t size
))
1049 errx(1, "unallocated block in symbolic link %s", curfile
.name
);
1053 * Collect the next block of a bit map.
1056 xtrmap(char *buf
, size_t size
)
1059 memmove(map
, buf
, size
);
1064 * Skip over a hole in a bit map (should never happen).
1068 xtrmapskip(UNUSED(char *buf
), size_t size
)
1071 panic("hole in map\n");
1076 * Noop, when an extraction function is not needed.
1080 xtrnull(UNUSED(char *buf
), UNUSED(size_t size
))
1086 #if COMPARE_ONTHEFLY
1088 * Compare the next block of a file.
1091 xtrcmpfile(char *buf
, size_t size
)
1093 static char cmpbuf
[MAXBSIZE
];
1098 if (read(ifile
, cmpbuf
, size
) != (ssize_t
)size
) {
1099 fprintf(stderr
, "%s: size has changed.\n",
1105 if (memcmp(buf
, cmpbuf
, size
) != 0) {
1106 fprintf(stderr
, "%s: tape and disk copies are different\n",
1114 * Skip over a hole in a file.
1117 xtrcmpskip(UNUSED(char *buf
), size_t size
)
1119 static char cmpbuf
[MAXBSIZE
];
1125 if (read(ifile
, cmpbuf
, size
) != (ssize_t
)size
) {
1126 fprintf(stderr
, "%s: size has changed.\n",
1132 for (i
= 0; i
< (int)size
; ++i
)
1133 if (cmpbuf
[i
] != '\0') {
1134 fprintf(stderr
, "%s: tape and disk copies are different\n",
1140 #endif /* COMPARE_ONTHEFLY */
1142 #if !COMPARE_ONTHEFLY
1144 do_cmpfiles(int fd_tape
, int fd_disk
, long size
)
1146 static char buf_tape
[BUFSIZ
];
1147 static char buf_disk
[BUFSIZ
];
1152 if ((n_tape
= read(fd_tape
, buf_tape
, sizeof(buf_tape
))) < 1) {
1153 close(fd_tape
), close(fd_disk
);
1154 panic("do_cmpfiles: unexpected EOF[1]");
1156 if ((n_disk
= read(fd_disk
, buf_disk
, sizeof(buf_tape
))) < 1) {
1157 close(fd_tape
), close(fd_disk
);
1158 panic("do_cmpfiles: unexpected EOF[2]");
1160 if (n_tape
!= n_disk
) {
1161 close(fd_tape
), close(fd_disk
);
1162 panic("do_cmpfiles: sizes different!");
1164 if (memcmp(buf_tape
, buf_disk
, (size_t)n_tape
) != 0) return (1);
1170 /* for debugging compare problems */
1171 #undef COMPARE_FAIL_KEEP_FILE
1174 #ifdef COMPARE_FAIL_KEEP_FILE
1175 /* return true if tapefile should be unlinked after compare */
1180 cmpfiles(char *tapefile
, char *diskfile
, struct STAT
*sbuf_disk
)
1182 struct STAT sbuf_tape
;
1183 int fd_tape
, fd_disk
;
1185 if (STAT(tapefile
, &sbuf_tape
) != 0) {
1186 panic("Can't lstat tmp file %s: %s\n", tapefile
,
1191 if (sbuf_disk
->st_size
!= sbuf_tape
.st_size
) {
1193 "%s: size changed from %ld to %ld.\n",
1194 diskfile
, (long)sbuf_tape
.st_size
, (long)sbuf_disk
->st_size
);
1196 #ifdef COMPARE_FAIL_KEEP_FILE
1203 if ((fd_tape
= OPEN(tapefile
, O_RDONLY
)) < 0) {
1204 panic("Can't open %s: %s\n", tapefile
, strerror(errno
));
1207 if ((fd_disk
= OPEN(diskfile
, O_RDONLY
)) < 0) {
1209 panic("Can't open %s: %s\n", diskfile
, strerror(errno
));
1213 if (do_cmpfiles(fd_tape
, fd_disk
, sbuf_tape
.st_size
)) {
1214 fprintf(stderr
, "%s: tape and disk copies are different\n",
1219 #ifdef COMPARE_FAIL_KEEP_FILE
1220 /* rename the file to live in /tmp */
1221 /* rename `tapefile' to /tmp/<basename of diskfile> */
1223 char *p
= strrchr(diskfile
, '/');
1224 char newname
[MAXPATHLEN
];
1226 panic("can't find / in %s\n", diskfile
);
1228 snprintf(newname
, sizeof(newname
), "%s/debug/%s", tmpdir
, p
+ 1);
1229 if (rename(tapefile
, newname
)) {
1230 panic("rename from %s to %s failed: %s\n",
1234 fprintf(stderr
, "*** %s saved to %s\n",
1239 /* don't unlink the file (it's not there anymore */
1248 #ifdef COMPARE_FAIL_KEEP_FILE
1252 #endif /* !COMPARE_ONTHEFLY */
1254 #if !COMPARE_ONTHEFLY
1255 static char tmpfilename
[MAXPATHLEN
];
1259 comparefile(char *name
)
1264 #if !COMPARE_ONTHEFLY
1265 static char *tmpfile
= NULL
;
1269 if ((r
= LSTAT(name
, &sb
)) != 0) {
1270 warn("%s: does not exist (%d)", name
, r
);
1276 curfile
.name
= name
;
1277 curfile
.action
= USING
;
1278 mode
= curfile
.dip
->di_mode
;
1280 Vprintf(stdout
, "comparing %s (size: %ld, mode: 0%o)\n", name
,
1281 (long)sb
.st_size
, mode
);
1283 if (sb
.st_mode
!= mode
) {
1284 fprintf(stderr
, "%s: mode changed from 0%o to 0%o.\n",
1285 name
, mode
& 07777, sb
.st_mode
& 07777);
1288 if (spcl
.c_flags
& DR_METAONLY
) {
1292 switch (mode
& IFMT
) {
1306 char lbuf
[MAXPATHLEN
+ 1];
1309 if (!(sb
.st_mode
& S_IFLNK
)) {
1310 fprintf(stderr
, "%s: is no longer a symbolic link\n",
1317 getfile(xtrlnkfile
, xtrlnkskip
);
1320 "%s: zero length symbolic link (ignored)\n",
1325 if ((lsize
= readlink(name
, lbuf
, MAXPATHLEN
)) < 0) {
1326 panic("readlink of %s failed: %s", name
,
1331 if (strcmp(lbuf
, lnkbuf
) != 0) {
1333 "%s: symbolic link changed from %s to %s.\n",
1334 name
, lnkbuf
, lbuf
);
1343 if (!(sb
.st_mode
& (S_IFCHR
|S_IFBLK
))) {
1344 fprintf(stderr
, "%s: no longer a special file\n",
1351 if (sb
.st_rdev
!= (dev_t
)curfile
.dip
->di_rdev
) {
1353 "%s: device changed from %d,%d to %d,%d.\n",
1355 ((int)curfile
.dip
->di_rdev
>> 8) & 0xff,
1356 (int)curfile
.dip
->di_rdev
& 0xff,
1357 ((int)sb
.st_rdev
>> 8) & 0xff,
1358 (int)sb
.st_rdev
& 0xff);
1365 #if COMPARE_ONTHEFLY
1366 if ((ifile
= OPEN(name
, O_RDONLY
)) < 0) {
1367 panic("Can't open %s: %s\n", name
, strerror(errno
));
1373 getfile(xtrcmpfile
, xtrcmpskip
);
1376 if (read(ifile
, &c
, 1) != 0) {
1377 fprintf(stderr
, "%s: size has changed.\n",
1387 if (tmpfile
== NULL
) {
1388 /* argument to mktemp() must not be in RO space: */
1389 snprintf(tmpfilename
, sizeof(tmpfilename
), "%s/restoreCXXXXXX", tmpdir
);
1390 tmpfile
= mktemp(&tmpfilename
[0]);
1392 if ((STAT(tmpfile
, &stemp
) == 0) && (unlink(tmpfile
) != 0)) {
1393 panic("cannot delete tmp file %s: %s\n",
1394 tmpfile
, strerror(errno
));
1396 if ((ofile
= OPEN(tmpfile
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0600)) < 0) {
1397 panic("cannot create file temp file %s: %s\n",
1398 name
, strerror(errno
));
1400 getfile(xtrfile
, xtrskip
);
1401 (void) close(ofile
);
1402 #ifdef COMPARE_FAIL_KEEP_FILE
1403 if (cmpfiles(tmpfile
, name
, &sb
))
1406 cmpfiles(tmpfile
, name
, &sb
);
1409 #endif /* COMPARE_ONTHEFLY */
1415 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1416 static void (*readtape_func
)(char *) = readtape_set
;
1419 * Read TP_BSIZE blocks from the input.
1420 * Handle read errors, and end of media.
1421 * Decompress compressed blocks.
1426 (*readtape_func
)(buf
); /* call the actual processing routine */
1430 * Set function pointer for readtape() routine. zflag and magtapein must
1431 * be correctly set before the first call to readtape().
1434 readtape_set(char *buf
)
1437 readtape_func
= readtape_uncompr
;
1441 readtape_func
= readtape_comprtape
;
1443 readtape_func
= readtape_comprfile
;
1448 #endif /* HAVE_ZLIB || HAVE_BZLIB */
1451 * This is the original readtape(), it's used for reading uncompressed input.
1452 * Read TP_BSIZE blocks from the input.
1453 * Handle read errors, and end of media.
1456 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1457 readtape_uncompr(char *buf
)
1462 ssize_t rd
, newvol
, i
;
1463 int cnt
, seek_failed
;
1465 if (blkcnt
< numtrec
) {
1466 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1472 for (i
= 0; i
< ntrec
; i
++)
1473 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1476 cnt
= ntrec
* TP_BSIZE
;
1479 if (createtapeposflag
)
1480 (void)GetTapePos(&curtapepos
);
1485 i
= rmtread(&tapebuf
[rd
], cnt
);
1488 i
= read(mt
, &tapebuf
[rd
], cnt
);
1491 * Check for mid-tape short read error.
1492 * If found, skip rest of buffer and start with the next.
1494 if (!pipein
&& numtrec
< ntrec
&& i
> 0) {
1495 Dprintf(stdout
, "mid-media short read error.\n");
1499 * Handle partial block read.
1501 if (pipein
&& i
== 0 && rd
> 0)
1503 else if (i
> 0 && i
!= ntrec
* TP_BSIZE
) {
1512 * Short read. Process the blocks read.
1514 if (i
% TP_BSIZE
!= 0)
1516 "partial block read: %ld should be %ld\n",
1517 (long)i
, ntrec
* TP_BSIZE
);
1518 numtrec
= i
/ TP_BSIZE
;
1522 * Handle read error.
1525 fprintf(stderr
, "Tape read error while ");
1526 switch (curfile
.action
) {
1528 fprintf(stderr
, "trying to set up tape\n");
1531 fprintf(stderr
, "trying to resynchronize\n");
1534 fprintf(stderr
, "restoring %s\n", curfile
.name
);
1537 fprintf(stderr
, "skipping over inode %lu\n",
1538 (unsigned long)curfile
.ino
);
1541 if (!yflag
&& !reply("continue"))
1543 i
= ntrec
* TP_BSIZE
;
1544 memset(tapebuf
, 0, (size_t)i
);
1547 seek_failed
= (rmtseek(i
, 1) < 0);
1550 seek_failed
= (LSEEK(mt
, i
, SEEK_CUR
) == (OFF_T
)-1);
1553 warn("continuation failed");
1554 if (!yflag
&& !reply("assume end-of-tape and continue"))
1560 * Handle end of tape.
1563 Vprintf(stdout
, "End-of-tape encountered\n");
1572 if (rd
% TP_BSIZE
!= 0)
1573 panic("partial block read: %d should be %d\n",
1574 rd
, ntrec
* TP_BSIZE
);
1576 memmove(&tapebuf
[rd
], &endoftapemark
, TP_BSIZE
);
1579 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1584 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1587 * Read a compressed format block from a file or pipe and uncompress it.
1588 * Attempt to handle read errors, and end of file.
1591 readtape_comprfile(char *buf
)
1593 long rl
, size
, i
, ret
;
1595 struct tapebuf
*tpb
;
1597 if (blkcnt
< numtrec
) {
1598 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1603 /* need to read the next block */
1605 for (i
= 0; i
< ntrec
; i
++)
1606 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1608 tpb
= (struct tapebuf
*) tapebuf
;
1610 /* read the block prefix */
1611 ret
= read_a_block(mt
, tapebuf
, PREFIXSIZE
, &rl
);
1612 converttapebuf(tpb
);
1614 if (Vflag
&& (ret
== 0 || rl
< (int)PREFIXSIZE
|| tpb
->length
== 0))
1621 if (size
> bufsize
) {
1622 /* something's wrong */
1623 Vprintf(stdout
, "Prefix size error, max size %d, got %ld\n",
1626 tpb
->length
= bufsize
;
1628 ret
= read_a_block(mt
, tpb
->buf
, size
, &rl
);
1632 tbufptr
= decompress_tapebuf(tpb
, rl
+ PREFIXSIZE
);
1633 if (tbufptr
== NULL
) {
1634 msg_read_error("File decompression error while");
1635 if (!yflag
&& !reply("continue"))
1637 memset(tapebuf
, 0, bufsize
);
1642 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1648 /* Errors while reading from a file or pipe are catastrophic. Since
1649 * there are no block boundaries, it's impossible to bypass the
1650 * block in error and find the start of the next block.
1653 /* It's possible to have multiple input files using -M
1654 * and -f file1,file2...
1656 Vprintf(stdout
, "End-of-File encountered\n");
1666 msg_read_error("Read error while");
1667 /* if (!yflag && !reply("continue")) */
1672 * Read compressed data from a tape and uncompress it.
1673 * Handle read errors, and end of media.
1674 * Since a tape consists of separate physical blocks, we try
1675 * to recover from errors by repositioning the tape to the next
1679 readtape_comprtape(char *buf
)
1683 struct tapebuf
*tpb
;
1686 if (blkcnt
< numtrec
) {
1687 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1692 /* need to read the next block */
1694 for (i
= 0; i
< ntrec
; i
++)
1695 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1697 tpb
= (struct tapebuf
*) tapebuf
;
1699 /* read the block */
1700 size
= bufsize
+ PREFIXSIZE
;
1701 ret
= read_a_block(mt
, tapebuf
, size
, &rl
);
1705 converttapebuf(tpb
);
1706 tbufptr
= decompress_tapebuf(tpb
, rl
);
1707 if (tbufptr
== NULL
) {
1708 msg_read_error("Tape decompression error while");
1709 if (!yflag
&& !reply("continue"))
1711 memset(tapebuf
, 0, PREFIXSIZE
+ bufsize
);
1717 /* Handle errors: EOT switches to the next volume, other errors
1718 * attempt to position the tape to the next block.
1721 Vprintf(stdout
, "End-of-tape encountered\n");
1730 msg_read_error("Tape read error while");
1731 if (!yflag
&& !reply("continue"))
1733 memset(tapebuf
, 0, PREFIXSIZE
+ bufsize
);
1738 rl
= rmtioctl(MTFSR
, 1);
1744 rl
= ioctl(mt
, MTIOCTOP
, &tcom
);
1748 warn("continuation failed");
1749 if (!yflag
&& !reply("assume end-of-tape and continue"))
1751 ret
= 0; /* end of tape */
1757 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1763 * Decompress a struct tapebuf into a buffer. readsize is the size read
1764 * from the tape/file and is used for error messages. Returns a pointer
1765 * to the location of the uncompressed buffer or NULL on errors.
1766 * Adjust numtrec and complain for a short block.
1769 decompress_tapebuf(struct tapebuf
*tpbin
, int readsize
)
1771 /* If zflag is on, all blocks have a struct tapebuf prefix */
1772 /* zflag gets set in setup() from the dump header */
1773 int cresult
, blocklen
;
1774 unsigned long worklen
;
1776 unsigned int worklen2
;
1778 char *output
= NULL
,*reason
= NULL
, *lengtherr
= NULL
;
1780 /* build a length error message */
1781 blocklen
= tpbin
->length
;
1782 if (readsize
< blocklen
+ (int)PREFIXSIZE
)
1783 lengtherr
= "short";
1785 if (readsize
> blocklen
+ (int)PREFIXSIZE
)
1790 if (tpbin
->compressed
) {
1791 /* uncompress whatever we read, if it fails, complain later */
1792 if (tpbin
->flags
== COMPRESS_ZLIB
) {
1794 errx(1,"This restore version doesn't support zlib decompression");
1796 cresult
= uncompress(comprbuf
, &worklen
,
1797 tpbin
->buf
, blocklen
);
1803 reason
= "not enough memory";
1806 reason
= "buffer too small";
1809 reason
= "data error";
1814 if (cresult
== Z_OK
)
1818 #endif /* HAVE_ZLIB */
1820 if (tpbin
->flags
== COMPRESS_BZLIB
) {
1822 errx(1,"This restore version doesn't support bzlib decompression");
1825 cresult
= BZ2_bzBuffToBuffDecompress(
1826 comprbuf
, &worklen2
,
1827 tpbin
->buf
, blocklen
, 0, 0);
1834 reason
= "not enough memory";
1836 case BZ_OUTBUFF_FULL
:
1837 reason
= "buffer too small";
1840 case BZ_DATA_ERROR_MAGIC
:
1841 case BZ_UNEXPECTED_EOF
:
1842 reason
= "data error";
1847 if (cresult
== BZ_OK
)
1851 #endif /* HAVE_BZLIB */
1855 output
= tpbin
->buf
;
1859 numtrec
= worklen
/ TP_BSIZE
;
1860 if (worklen
% TP_BSIZE
!= 0)
1861 reason
= "length mismatch";
1865 fprintf(stderr
, "%s compressed block: %d expected: %d\n",
1866 lengtherr
, readsize
, tpbin
->length
+ PREFIXSIZE
);
1867 fprintf(stderr
, "decompression error, block %ld: %s\n",
1868 tpblksread
+1, reason
);
1876 * Print an error message for a read error.
1877 * This was exteracted from the original readtape().
1880 msg_read_error(char *m
)
1882 switch (curfile
.action
) {
1884 fprintf(stderr
, "%s trying to set up tape\n", m
);
1887 fprintf(stderr
, "%s trying to resynchronize\n", m
);
1890 fprintf(stderr
, "%s restoring %s\n", m
, curfile
.name
);
1893 fprintf(stderr
, "%s skipping over inode %lu\n", m
,
1894 (unsigned long)curfile
.ino
);
1898 #endif /* HAVE_ZLIB || HAVE_BZLIB */
1901 * Read the first block and get the blocksize from it. Test
1902 * for a compressed dump tape/file. setup() will make the final
1903 * determination by checking the compressed flag if gethead()
1904 * finds a valid header. The test here is necessary to offset the buffer
1905 * by the size of the compressed prefix. zflag is set here so that
1906 * readtape_set can set the correct function pointer for readtape().
1907 * Note that the first block of each tape/file is not compressed
1908 * and does not have a prefix.
1911 findtapeblksize(void)
1915 struct tapebuf
*tpb
= (struct tapebuf
*) tapebuf
;
1916 struct s_spcl spclpt
;
1918 for (i
= 0; i
< ntrec
; i
++)
1919 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1923 * For a pipe or file, read in the first record. For a tape, read
1926 len
= magtapein
? ntrec
* TP_BSIZE
: TP_BSIZE
;
1928 if (read_a_block(mt
, tapebuf
, len
, &i
) <= 0)
1929 errx(1, "Tape read error on first record");
1931 memcpy(&spclpt
, tapebuf
, TP_BSIZE
);
1932 if (converthead(&spclpt
) == FAIL
) {
1934 if (converthead(&spclpt
) == FAIL
) {
1935 /* Special case for old compressed tapes with prefix */
1936 if (magtapein
&& (i
% TP_BSIZE
!= 0))
1938 errx(1, "Tape is not a dump tape");
1940 fprintf(stderr
, "Converting to new file system format.\n");
1943 * If the input is from a file or a pipe, we read TP_BSIZE
1944 * bytes looking for a dump header. If the dump is compressed
1945 * we need to read in the rest of the block, as determined
1946 * by c_ntrec in the dump header. The first block of the
1947 * dump is not compressed and does not have a prefix.
1950 if (spclpt
.c_type
== TS_TAPE
1951 && spclpt
.c_flags
& DR_COMPRESSED
) {
1952 /* It's a compressed dump file, read in the */
1953 /* rest of the block based on spclpt.c_ntrec. */
1954 if (spclpt
.c_ntrec
> ntrec
)
1955 errx(1, "Tape blocksize is too large, use "
1956 "\'-b %d\' ", spclpt
.c_ntrec
);
1957 ntrec
= spclpt
.c_ntrec
;
1958 len
= (ntrec
- 1) * TP_BSIZE
;
1962 /* read in the rest of the block based on bufsize */
1963 len
= bufsize
- TP_BSIZE
;
1965 if (read_a_block(mt
, tapebuf
+TP_BSIZE
, len
, &i
) < 0
1966 || (i
!= (long)len
&& i
% TP_BSIZE
!= 0))
1967 errx(1,"Error reading dump file header");
1970 Vprintf(stdout
, "Input block size is %ld\n", ntrec
);
1972 } /* if (!magtapein) */
1975 * If the input is a tape, we tried to read ntrec * TP_BSIZE bytes.
1976 * If the value of ntrec is too large, we read less than
1977 * what we asked for; adjust the value of ntrec and test for
1978 * a compressed dump tape.
1980 if (i
% TP_BSIZE
!= 0) {
1982 /* may be old format compressed dump tape with a prefix */
1983 memcpy(&spclpt
, tpb
->buf
, TP_BSIZE
);
1985 if (converthead(&spclpt
) == FAIL
) {
1987 if (converthead(&spclpt
) == FAIL
)
1988 errx(1, "Tape is not a dump tape");
1989 fprintf(stderr
, "Converting to new file system format.\n");
1991 if (i
% TP_BSIZE
== PREFIXSIZE
1992 && tpb
->compressed
== 0
1993 && spclpt
.c_type
== TS_TAPE
1994 && spclpt
.c_flags
& DR_COMPRESSED
) {
1997 if (tpb
->length
> bufsize
)
1998 errx(1, "Tape blocksize is too large, use "
1999 "\'-b %d\' ", tpb
->length
/ TP_BSIZE
);
2002 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
2005 ntrec
= i
/ TP_BSIZE
;
2006 if (spclpt
.c_type
== TS_TAPE
) {
2007 if (spclpt
.c_flags
& DR_COMPRESSED
)
2009 if (spclpt
.c_ntrec
> ntrec
)
2010 errx(1, "Tape blocksize is too large, use "
2011 "\'-b %d\' ", spclpt
.c_ntrec
);
2014 Vprintf(stdout
, "Tape block size is %ld\n", ntrec
);
2018 * Read a block of data handling all of the messy details.
2020 static int read_a_block(int fd
, char *buf
, size_t len
, long *lengthread
)
2028 i
= rmtread(buf
, size
);
2031 i
= read(fd
, buf
, size
);
2034 break; /* EOD or error */
2037 break; /* block at a time for mt */
2040 *lengthread
= len
- size
;
2059 setmagtapein(void) {
2060 struct mtget mt_stat
;
2061 static int done
= 0;
2066 /* need to know if input is really from a tape */
2072 magtapein
= ioctl(mt
, MTIOCGET
, (char *)&mt_stat
) == 0;
2075 Vprintf(stdout
,"Input is from %s\n",
2076 magtapein
? "tape" :
2077 Vflag
? "multi-volume (no tape)" : "file/pipe");
2081 * Read the next block from the tape.
2082 * Check to see if it is one of several vintage headers.
2083 * If it is an old style header, convert it to a new style header.
2084 * If it is not any valid header, return an error.
2087 gethead(struct s_spcl
*buf
)
2089 readtape((char *)buf
);
2090 return converthead(buf
);
2094 converthead(struct s_spcl
*buf
)
2102 char dummy
[TP_BSIZE
];
2109 u_int16_t c_inumber
;
2114 u_int16_t odi_nlink
;
2130 if (buf
->c_magic
!= NFS_MAGIC
) {
2131 if (swabi(buf
->c_magic
) != NFS_MAGIC
)
2134 Vprintf(stdout
, "Note: Doing Byte swapping\n");
2138 if (checksum((int *)buf
) == FAIL
)
2141 swabst((u_char
*)"8i4s31i528bi192b3i", (u_char
*)buf
);
2144 memcpy(&u_ospcl
.s_ospcl
, buf
, TP_BSIZE
);
2145 memset((char *)buf
, 0, (long)TP_BSIZE
);
2146 buf
->c_type
= u_ospcl
.s_ospcl
.c_type
;
2147 buf
->c_date
= u_ospcl
.s_ospcl
.c_date
;
2148 buf
->c_ddate
= u_ospcl
.s_ospcl
.c_ddate
;
2149 buf
->c_volume
= u_ospcl
.s_ospcl
.c_volume
;
2150 buf
->c_tapea
= u_ospcl
.s_ospcl
.c_tapea
;
2151 buf
->c_inumber
= u_ospcl
.s_ospcl
.c_inumber
;
2152 buf
->c_checksum
= u_ospcl
.s_ospcl
.c_checksum
;
2153 buf
->c_magic
= u_ospcl
.s_ospcl
.c_magic
;
2154 buf
->c_dinode
.di_mode
= u_ospcl
.s_ospcl
.c_dinode
.odi_mode
;
2155 buf
->c_dinode
.di_nlink
= u_ospcl
.s_ospcl
.c_dinode
.odi_nlink
;
2156 buf
->c_dinode
.di_uid
= u_ospcl
.s_ospcl
.c_dinode
.odi_uid
;
2157 buf
->c_dinode
.di_gid
= u_ospcl
.s_ospcl
.c_dinode
.odi_gid
;
2158 buf
->c_dinode
.di_size
= u_ospcl
.s_ospcl
.c_dinode
.odi_size
;
2159 buf
->c_dinode
.di_rdev
= u_ospcl
.s_ospcl
.c_dinode
.odi_rdev
;
2160 #if defined(__linux__) || defined(sunos)
2161 buf
->c_dinode
.di_atime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_atime
;
2162 buf
->c_dinode
.di_mtime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_mtime
;
2163 buf
->c_dinode
.di_ctime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_ctime
;
2164 #else /* __linux__ || sunos */
2165 buf
->c_dinode
.di_atime
= u_ospcl
.s_ospcl
.c_dinode
.odi_atime
;
2166 buf
->c_dinode
.di_mtime
= u_ospcl
.s_ospcl
.c_dinode
.odi_mtime
;
2167 buf
->c_dinode
.di_ctime
= u_ospcl
.s_ospcl
.c_dinode
.odi_ctime
;
2168 #endif /* __linux__ || sunos */
2169 buf
->c_count
= u_ospcl
.s_ospcl
.c_count
;
2170 memmove(buf
->c_addr
, u_ospcl
.s_ospcl
.c_fill
, (long)256);
2171 if (u_ospcl
.s_ospcl
.c_magic
!= OFS_MAGIC
||
2172 checksum((int *)(&u_ospcl
.s_ospcl
)) == FAIL
)
2174 buf
->c_magic
= NFS_MAGIC
;
2177 if ((buf
->c_dinode
.di_size
== 0 || buf
->c_dinode
.di_size
> 0xfffffff) &&
2178 (buf
->c_dinode
.di_mode
& IFMT
) == IFDIR
&& Qcvt
== 0) {
2179 qcvt
.qval
= buf
->c_dinode
.di_size
;
2180 if (qcvt
.val
[0] || qcvt
.val
[1]) {
2181 Vprintf(stdout
, "Note: Doing Quad swapping\n");
2186 qcvt
.qval
= buf
->c_dinode
.di_size
;
2188 qcvt
.val
[1] = qcvt
.val
[0];
2190 buf
->c_dinode
.di_size
= qcvt
.qval
;
2194 switch (buf
->c_type
) {
2199 * Have to patch up missing information in bit map headers
2202 buf
->c_dinode
.di_size
= buf
->c_count
* TP_BSIZE
;
2203 if (buf
->c_count
> TP_NINDIR
)
2206 for (i
= 0; i
< buf
->c_count
; i
++)
2211 if ((buf
->c_flags
& DR_NEWINODEFMT
) == 0)
2216 if (buf
->c_flags
& DR_INODEINFO
) {
2217 memcpy(volinfo
, buf
->c_inos
, TP_NINOS
* sizeof(dump_ino_t
));
2219 swabst((u_char
*)"128i", (u_char
*)volinfo
);
2228 panic("gethead: unknown inode type %d\n", buf
->c_type
);
2232 * If we are restoring a filesystem with old format inodes,
2233 * copy the uid/gid to the new location.
2236 buf
->c_dinode
.di_uid
= buf
->c_dinode
.di_ouid
;
2237 buf
->c_dinode
.di_gid
= buf
->c_dinode
.di_ogid
;
2245 converttapebuf(struct tapebuf
*tpb
)
2249 unsigned int length
:28;
2250 unsigned int flags
:3;
2251 unsigned int compressed
:1;
2253 swabst((u_char
*)"i", (u_char
*)tpb
);
2254 memcpy(&tb
, tpb
, 4);
2255 tpb
->length
= tb
.length
;
2256 tpb
->flags
= tb
.flags
;
2257 tpb
->compressed
= tb
.compressed
;
2262 * Check that a header is where it belongs and predict the next header
2265 accthdr(struct s_spcl
*header
)
2267 static dump_ino_t previno
= 0x7fffffff;
2268 static int prevtype
;
2269 static long predict
;
2272 if (header
->c_type
== TS_TAPE
) {
2273 fprintf(stderr
, "Volume header (%s inode format) ",
2274 oldinofmt
? "old" : "new");
2275 if (header
->c_firstrec
)
2276 fprintf(stderr
, "begins with record %d",
2277 header
->c_firstrec
);
2278 fprintf(stderr
, "\n");
2279 previno
= 0x7fffffff;
2282 if (previno
== 0x7fffffff)
2286 fprintf(stderr
, "Dumped inodes map header");
2289 fprintf(stderr
, "Used inodes map header");
2292 fprintf(stderr
, "File header, ino %lu", (unsigned long)previno
);
2295 fprintf(stderr
, "File continuation header, ino %ld", (long)previno
);
2298 fprintf(stderr
, "End of tape header");
2301 if (predict
!= blksread
- 1)
2302 fprintf(stderr
, "; predicted %ld blocks, got %ld blocks",
2303 predict
, blksread
- 1);
2304 fprintf(stderr
, "\n");
2307 if (header
->c_type
!= TS_END
)
2308 for (i
= 0; i
< header
->c_count
; i
++)
2309 if (readmapflag
|| header
->c_addr
[i
] != 0)
2313 prevtype
= header
->c_type
;
2314 previno
= header
->c_inumber
;
2318 * Find an inode header.
2319 * Complain if had to skip, and complain is set.
2322 findinode(struct s_spcl
*header
)
2324 static long skipcnt
= 0;
2328 curfile
.name
= "<name unknown>";
2329 curfile
.action
= UNKNOWN
;
2333 if (header
->c_magic
!= NFS_MAGIC
) {
2335 while (gethead(header
) == FAIL
||
2336 header
->c_date
!= dumpdate
)
2339 switch (header
->c_type
) {
2343 * Skip up to the beginning of the next record
2345 for (i
= 0; i
< header
->c_count
; i
++)
2346 if (header
->c_addr
[i
])
2348 while (gethead(header
) == FAIL
||
2349 header
->c_date
!= dumpdate
)
2354 curfile
.dip
= &header
->c_dinode
;
2355 curfile
.ino
= header
->c_inumber
;
2359 curfile
.ino
= maxino
;
2363 curfile
.name
= "<file removal list>";
2367 curfile
.name
= "<file dump list>";
2371 panic("unexpected tape header\n");
2375 panic("unknown tape header type %d\n", spcl
.c_type
);
2379 } while (header
->c_type
== TS_ADDR
);
2384 fprintf(stderr
, "resync restore, skipped %ld blocks\n",
2394 j
= sizeof(union u_spcl
) / sizeof(int);
2401 /* What happens if we want to read restore tapes
2402 for a 16bit int machine??? */
2408 if (i
!= CHECKSUM
) {
2409 fprintf(stderr
, "Checksum error %o, inode %lu file %s\n", i
,
2410 (unsigned long)curfile
.ino
, curfile
.name
);
2420 #include <varargs.h>
2425 msg(const char *fmt
, ...)
2438 (void)vfprintf(stderr
, fmt
, ap
);
2441 #endif /* RRESTORE */
2444 swab16(u_char
*sp
, int n
)
2449 c
= sp
[0]; sp
[0] = sp
[1]; sp
[1] = c
;
2456 swab32(u_char
*sp
, int n
)
2461 c
= sp
[0]; sp
[0] = sp
[3]; sp
[3] = c
;
2462 c
= sp
[1]; sp
[1] = sp
[2]; sp
[2] = c
;
2469 swab64(u_char
*sp
, int n
)
2474 c
= sp
[0]; sp
[0] = sp
[7]; sp
[7] = c
;
2475 c
= sp
[1]; sp
[1] = sp
[6]; sp
[6] = c
;
2476 c
= sp
[2]; sp
[2] = sp
[5]; sp
[5] = c
;
2477 c
= sp
[3]; sp
[3] = sp
[4]; sp
[4] = c
;
2484 swabst(u_char
*cp
, u_char
*sp
)
2490 case '0': case '1': case '2': case '3': case '4':
2491 case '5': case '6': case '7': case '8': case '9':
2492 n
= (n
* 10) + (*cp
++ - '0');
2495 case 's': case 'w': case 'h':
2513 default: /* Any other character, like 'b' counts as byte. */
2527 swabst((u_char
*)"i", (u_char
*)&x
);
2535 swabst((u_char
*)"l", (u_char
*)&x
);
2542 * get the current position of the tape
2545 GetTapePos(long long *pos
)
2551 *pos
= (long long) rmtseek(0, SEEK_CUR
);
2560 err
= (ioctl(mt
, MTIOCPOS
, &mtpos
) < 0);
2561 *pos
= (long long)mtpos
;
2564 *pos
= LSEEK(mt
, 0, SEEK_CUR
);
2570 fprintf(stdout
, "[%ld] error: %d (getting tapepos: %lld)\n",
2571 (unsigned long)getpid(), err
, *pos
);
2577 typedef struct mt_pos
{
2580 } MTPosRec
, *MTPosPtr
;
2583 * go to specified position on tape
2586 GotoTapePos(long long pos
)
2592 err
= (rmtseek(pos
, SEEK_SET
) < 0);
2599 buf
.mt_count
= (int) pos
;
2600 err
= (ioctl(mt
, MTIOCTOP
, &buf
) < 0);
2603 pos
= LSEEK(mt
, pos
, SEEK_SET
);
2609 fprintf(stdout
, "[%ld] error: %d (setting tapepos: %lld)\n",
2610 (unsigned long)getpid(), err
, pos
);
2617 * read next data from tape to re-sync
2620 ReReadFromTape(void)
2624 if (gethead(&spcl
) == FAIL
) {
2626 fprintf(stdout
, "DEBUG 1 gethead failed\n");
2634 ReReadInodeFromTape(dump_ino_t theino
)
2643 } while (!(spcl
.c_inumber
== theino
&& spcl
.c_type
== TS_INODE
&& spcl
.c_date
== dumpdate
) && (cntloop
< 32));
2645 fprintf(stderr
, "%ld reads\n", cntloop
);
2646 if (cntloop
== 32) {
2647 fprintf(stderr
, "DEBUG: bufsize %d\n", bufsize
);
2648 fprintf(stderr
, "DEBUG: ntrec %ld\n", ntrec
);
2649 fprintf(stderr
, "DEBUG: %ld reads\n", cntloop
);
2655 #endif /* USE_QFA */
2658 RequestVol(long tnum
)