]>
git.wh0rd.org - dump.git/blob - restore/tape.c
cf024713643ab76e53dca89f0142f14279196b65
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 1.54 2002/01/22 11:12:28 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 */
119 static char *host
= NULL
;
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 void readtape
__P((char *));
138 static void setdumpnum
__P((void));
139 static u_int swabi
__P((u_int
));
141 static u_long swabl
__P((u_long
));
143 static u_char
*swab64
__P((u_char
*, int));
144 static u_char
*swab32
__P((u_char
*, int));
145 static u_char
*swab16
__P((u_char
*, int));
146 static void terminateinput
__P((void));
147 static void xtrfile
__P((char *, size_t));
148 static void xtrlnkfile
__P((char *, size_t));
149 static void xtrlnkskip
__P((char *, size_t));
150 static void xtrmap
__P((char *, size_t));
151 static void xtrmapskip
__P((char *, size_t));
152 static void xtrskip
__P((char *, size_t));
153 static void setmagtapein
__P((void));
155 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
156 static void newcomprbuf
__P((int));
157 static void readtape_set
__P((char *));
158 static void readtape_uncompr
__P((char *));
159 static void readtape_comprfile
__P((char *));
160 static void readtape_comprtape
__P((char *));
161 static char *decompress_tapebuf
__P((struct tapebuf
*, int));
162 static void msg_read_error
__P((char *));
164 static int read_a_block
__P((int, char *, size_t, long *));
165 #define PREFIXSIZE sizeof(struct tapebuf)
167 #define COMPARE_ONTHEFLY 1
170 static int ifile
; /* input file for compare */
171 static int cmperror
; /* compare error */
172 static void xtrcmpfile
__P((char *, size_t));
173 static void xtrcmpskip
__P((char *, size_t));
176 static int readmapflag
;
179 * Set up an input source. This is called from main.c before setup() is.
182 setinput(char *source
)
188 newtapebuf(NTREC
> HIGHDENSITYTREC
? NTREC
: HIGHDENSITYTREC
);
192 if (strchr(source
, ':')) {
195 errx(1, "cannot use -Q option on remote media");
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
;
272 Vprintf(stdout
, "Verify tape and initialize maps\n");
274 msg("Launching %s\n", bot_script
);
275 bot_code
= system_command(bot_script
, magtape
, 1);
276 if (bot_code
!= 0 && bot_code
!= 1) {
277 msg("Restore aborted by the beginning of tape script\n");
283 mt
= rmtopen(magtape
, 0);
289 mt
= OPEN(magtape
, O_RDONLY
, 0);
291 err(1, "%s", magtape
);
297 if (gethead(&spcl
) == FAIL
) {
298 blkcnt
--; /* push back this block */
302 if (gethead(&spcl
) == FAIL
)
303 errx(1, "Tape is not a dump tape");
304 fprintf(stderr
, "Converting to new file system format.\n");
308 fprintf(stderr
, "Dump tape is compressed.\n");
309 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
312 errx(1,"This restore version doesn't support decompression");
313 #endif /* HAVE_ZLIB */
316 endoftapemark
.s_spcl
.c_magic
= cvtflag
? OFS_MAGIC
: NFS_MAGIC
;
317 endoftapemark
.s_spcl
.c_type
= TS_END
;
318 ip
= (int *)&endoftapemark
;
319 j
= sizeof(union u_spcl
) / sizeof(int);
324 endoftapemark
.s_spcl
.c_checksum
= CHECKSUM
- i
;
326 if (vflag
|| command
== 't' || command
== 'C')
328 if (filesys
[0] == '\0') {
330 strncpy(filesys
, spcl
.c_filesys
, NAMELEN
);
331 filesys
[NAMELEN
- 1] = '\0';
332 dirptr
= strstr(filesys
, " (dir");
336 dumptime
= spcl
.c_ddate
;
337 dumpdate
= spcl
.c_date
;
338 if (STAT(".", &stbuf
) < 0)
339 err(1, "cannot stat .");
340 if (stbuf
.st_blksize
> 0 && stbuf
.st_blksize
< TP_BSIZE
)
342 if (stbuf
.st_blksize
>= TP_BSIZE
&& stbuf
.st_blksize
<= MAXBSIZE
)
343 fssize
= stbuf
.st_blksize
;
344 if (((fssize
- 1) & fssize
) != 0)
345 errx(1, "bad block size %ld", fssize
);
346 if (spcl
.c_volume
!= 1)
347 errx(1, "Tape is not volume 1 of the dump");
348 if (gethead(&spcl
) == FAIL
) {
349 Dprintf(stdout
, "header read failed at %ld blocks\n", (long)blksread
);
350 panic("no header after volume mark!\n");
353 if (spcl
.c_type
!= TS_CLRI
)
354 errx(1, "Cannot find file removal list");
355 maxino
= (spcl
.c_count
* TP_BSIZE
* NBBY
) + 1;
356 Dprintf(stdout
, "maxino = %ld\n", (long)maxino
);
357 map
= calloc((unsigned)1, (unsigned)howmany(maxino
, NBBY
));
359 errx(1, "no memory for active inode map");
361 curfile
.action
= USING
;
362 getfile(xtrmap
, xtrmapskip
);
363 if (spcl
.c_type
!= TS_BITS
)
364 errx(1, "Cannot find file dump list");
365 map
= calloc((unsigned)1, (unsigned)howmany(maxino
, NBBY
));
366 if (map
== (char *)NULL
)
367 errx(1, "no memory for file dump list");
369 curfile
.action
= USING
;
370 getfile(xtrmap
, xtrmapskip
);
372 * If there may be whiteout entries on the tape, pretend that the
373 * whiteout inode exists, so that the whiteout entries can be
377 SETINO(WINO
, dumpmap
);
381 * Prompt user to load a new dump volume.
382 * "Nextvol" is the next suggested volume to use.
383 * This suggested volume is enforced when doing full
384 * or incremental restores, but can be overridden by
385 * the user when only extracting a subset of the files.
390 long newvol
= 0, wantnext
= 0, i
;
391 long saved_blksread
= 0, saved_tpblksread
= 0;
392 union u_spcl tmpspcl
;
393 # define tmpbuf tmpspcl.s_spcl
395 int haderror
= 0, bot_code
= 1;
403 panic("Changing volumes on pipe input?\n");
408 saved_blksread
= blksread
;
409 saved_tpblksread
= tpblksread
;
412 exit(1); /* pipes do not get a second chance */
413 if (aflag
|| curfile
.action
!= SKIP
) {
420 while (newvol
<= 0) {
421 if (tapesread
== 0) {
422 fprintf(stderr
, "%s%s%s%s%s",
423 "You have not read any tapes yet.\n",
424 "Unless you know which volume your",
425 " file(s) are on you should start\n",
426 "with the last volume and work",
427 " towards the first.\n");
429 fprintf(stderr
, "You have read volumes");
431 for (i
= 1; i
< 32; i
++)
432 if (tapesread
& (1 << i
)) {
433 fprintf(stderr
, "%s%ld", buf
, (long)i
);
436 fprintf(stderr
, "\n");
439 fprintf(stderr
, "Specify next volume # (none if no more volumes): ");
440 (void) fflush(stderr
);
441 (void) fgets(buf
, TP_BSIZE
, terminal
);
442 } while (!feof(terminal
) && buf
[0] == '\n');
445 if (!strcmp(buf
, "none\n")) {
452 "Volume numbers are positive numerics\n");
455 if (newvol
== volno
) {
456 tapesread
|= 1 << volno
;
461 snprintf(magtape
, MAXPATHLEN
, "%s%03ld", magtapeprefix
, newvol
);
462 magtape
[MAXPATHLEN
- 1] = '\0';
464 if (bot_script
&& !haderror
) {
465 msg("Launching %s\n", bot_script
);
466 bot_code
= system_command(bot_script
, magtape
, newvol
);
467 if (bot_code
!= 0 && bot_code
!= 1) {
468 msg("Restore aborted by the beginning of tape script\n");
472 if (haderror
|| (bot_code
&& !Mflag
)) {
474 fprintf(stderr
, "Mount tape volume %ld\n", (long)newvol
);
475 fprintf(stderr
, "Enter ``none'' if there are no more tapes\n");
476 fprintf(stderr
, "otherwise enter tape name (default: %s) ", magtape
);
477 (void) fflush(stderr
);
478 (void) fgets(buf
, TP_BSIZE
, terminal
);
481 if (!strcmp(buf
, "none\n")) {
485 if (buf
[0] != '\n') {
487 (void) strncpy(magtape
, buf
, sizeof(magtape
));
488 magtape
[sizeof(magtape
) - 1] = '\0';
489 if ((pos
= strchr(magtape
, '\n')))
490 magtape
[pos
- magtape
] = '\0';
495 mt
= rmtopen(magtape
, 0);
498 mt
= OPEN(magtape
, O_RDONLY
, 0);
501 fprintf(stderr
, "Cannot open %s\n", magtape
);
512 if (gethead(&tmpbuf
) == FAIL
) {
513 Dprintf(stdout
, "header read failed at %ld blocks\n", (long)blksread
);
514 fprintf(stderr
, "tape is not dump tape\n");
517 blksread
= saved_blksread
;
518 tpblksread
= saved_tpblksread
;
521 if (tmpbuf
.c_volume
!= volno
) {
522 fprintf(stderr
, "Wrong volume (%d)\n", tmpbuf
.c_volume
);
525 blksread
= saved_blksread
;
526 tpblksread
= saved_tpblksread
;
529 if (tmpbuf
.c_date
!= dumpdate
|| tmpbuf
.c_ddate
!= dumptime
) {
530 fprintf(stderr
, "Wrong dump date\n\tgot: %s",
531 ctime4(&tmpbuf
.c_date
));
532 fprintf(stderr
, "\twanted: %s", ctime(&dumpdate
));
535 blksread
= saved_blksread
;
536 tpblksread
= saved_tpblksread
;
539 tapesread
|= 1 << volno
;
540 blksread
= saved_blksread
;
541 tpblksread
= saved_tpblksread
;
543 * If continuing from the previous volume, skip over any
544 * blocks read already at the end of the previous volume.
546 * If coming to this volume at random, skip to the beginning
547 * of the next record.
549 Dprintf(stdout
, "read %ld recs, tape starts with %ld\n",
550 tpblksread
, (long)tmpbuf
.c_firstrec
);
551 if (tmpbuf
.c_type
== TS_TAPE
&& (tmpbuf
.c_flags
& DR_NEWHEADER
)) {
553 tpblksread
= tmpbuf
.c_firstrec
;
554 for (i
= tmpbuf
.c_count
; i
> 0; i
--)
556 } else if (tmpbuf
.c_firstrec
> 0 &&
557 tmpbuf
.c_firstrec
< tpblksread
- 1) {
559 * -1 since we've read the volume header
561 i
= tpblksread
- tmpbuf
.c_firstrec
- 1;
562 Dprintf(stderr
, "Skipping %ld duplicate record%s.\n",
563 (long)i
, i
> 1 ? "s" : "");
568 if (curfile
.action
== USING
) {
570 panic("active file into volume 1\n");
574 * Skip up to the beginning of the next record
576 if (tmpbuf
.c_type
== TS_TAPE
&& (tmpbuf
.c_flags
& DR_NEWHEADER
))
577 for (i
= tmpbuf
.c_count
; i
> 0; i
--)
579 (void) gethead(&spcl
);
583 siglongjmp(restart
, 1);
588 * Handle unexpected EOF.
594 if (gettingfile
&& curfile
.action
== USING
) {
595 printf("Warning: %s %s\n",
596 "End-of-input encountered while extracting", curfile
.name
);
598 curfile
.name
= "<name unknown>";
599 curfile
.action
= UNKNOWN
;
601 curfile
.ino
= maxino
;
604 siglongjmp(restart
, 1);
609 * handle multiple dumps per tape by skipping forward to the
617 if (dumpnum
== 1 || volno
!= 1)
620 errx(1, "Cannot have multiple dumps on pipe input");
622 tcom
.mt_count
= dumpnum
- 1;
625 rmtioctl(MTFSF
, dumpnum
- 1);
628 if (ioctl(mt
, (int)MTIOCTOP
, (char *)&tcom
) < 0)
635 fprintf(stdout
, "Dump date: %s", ctime4(&spcl
.c_date
));
636 fprintf(stdout
, "Dumped from: %s",
637 (spcl
.c_ddate
== 0) ? "the epoch\n" : ctime4(&spcl
.c_ddate
));
638 if (spcl
.c_host
[0] == '\0')
640 fprintf(stdout
, "Level %d dump of %s on %s:%s\n",
641 spcl
.c_level
, spcl
.c_filesys
, spcl
.c_host
, spcl
.c_dev
);
642 fprintf(stdout
, "Label: %s\n", spcl
.c_label
);
646 extractfile(char *name
)
650 struct timeval timep
[2];
654 curfile
.action
= USING
;
656 timep
[0].tv_sec
= curfile
.dip
->di_atime
.tv_sec
;
657 timep
[0].tv_usec
= curfile
.dip
->di_atime
.tv_usec
;
658 timep
[1].tv_sec
= curfile
.dip
->di_mtime
.tv_sec
;
659 timep
[1].tv_usec
= curfile
.dip
->di_mtime
.tv_usec
;
660 #else /* __linux__ */
661 timep
[0].tv_sec
= curfile
.dip
->di_atime
;
662 timep
[0].tv_usec
= curfile
.dip
->di_atimensec
/ 1000;
663 timep
[1].tv_sec
= curfile
.dip
->di_mtime
;
664 timep
[1].tv_usec
= curfile
.dip
->di_mtimensec
/ 1000;
665 #endif /* __linux__ */
666 mode
= curfile
.dip
->di_mode
;
667 flags
= curfile
.dip
->di_flags
;
668 switch (mode
& IFMT
) {
671 fprintf(stderr
, "%s: unknown file mode 0%o\n", name
, mode
);
676 Vprintf(stdout
, "skipped socket %s\n", name
);
682 ep
= lookupname(name
);
683 if (ep
== NULL
|| ep
->e_flags
& EXTRACT
)
684 panic("unextracted directory %s\n", name
);
688 Vprintf(stdout
, "extract file %s\n", name
);
689 return (genliteraldir(name
, curfile
.ino
));
694 uid_t luid
= curfile
.dip
->di_uid
;
695 gid_t lgid
= curfile
.dip
->di_gid
;
699 getfile(xtrlnkfile
, xtrlnkskip
);
702 "%s: zero length symbolic link (ignored)\n", name
);
705 if (linkit(lnkbuf
, name
, SYMLINK
) == FAIL
)
708 (void) lchown(name
, luid
, lgid
);
714 Vprintf(stdout
, "extract fifo %s\n", name
);
721 if (mkfifo(name
, mode
) < 0) {
722 warn("%s: cannot create fifo", name
);
726 (void) chown(name
, curfile
.dip
->di_uid
, curfile
.dip
->di_gid
);
727 (void) chmod(name
, mode
);
730 (void) fsetflags(name
, flags
);
732 (void) chflags(name
, flags
);
740 Vprintf(stdout
, "extract special file %s\n", name
);
747 if (mknod(name
, mode
, (int)curfile
.dip
->di_rdev
) < 0) {
748 warn("%s: cannot create special file", name
);
752 (void) chown(name
, curfile
.dip
->di_uid
, curfile
.dip
->di_gid
);
753 (void) chmod(name
, mode
);
757 warn("%s: fsetflags called on a special file", name
);
758 (void) fsetflags(name
, flags
);
761 (void) chflags(name
, flags
);
768 Vprintf(stdout
, "extract file %s\n", name
);
775 if ((ofile
= OPEN(name
, O_WRONLY
| O_CREAT
| O_TRUNC
,
777 warn("%s: cannot create file", name
);
781 (void) fchown(ofile
, curfile
.dip
->di_uid
, curfile
.dip
->di_gid
);
782 (void) fchmod(ofile
, mode
);
785 (void) setflags(ofile
, flags
);
787 (void) fchflags(ofile
, flags
);
789 getfile(xtrfile
, xtrskip
);
798 * skip over bit maps on the tape
804 while (spcl
.c_type
== TS_BITS
|| spcl
.c_type
== TS_CLRI
)
809 * skip over a file on the tape
815 curfile
.action
= SKIP
;
816 getfile(xtrnull
, xtrnull
);
820 * Extract a file from the tape.
821 * When an allocated block is found it is passed to the fill function;
822 * when an unallocated block (hole) is found, a zeroed buffer is passed
823 * to the skip function.
826 getfile(void (*fill
) __P((char *, size_t)), void (*skip
) __P((char *, size_t)))
829 volatile int curblk
= 0;
830 volatile quad_t size
= spcl
.c_dinode
.di_size
;
831 volatile int last_write_was_hole
= 0;
832 quad_t origsize
= size
;
833 static char clearedbuf
[MAXBSIZE
];
834 char buf
[MAXBSIZE
/ TP_BSIZE
][TP_BSIZE
];
837 if (spcl
.c_type
== TS_END
)
838 panic("ran off end of tape\n");
839 if (spcl
.c_magic
!= NFS_MAGIC
)
840 panic("not at beginning of a file\n");
841 if (!gettingfile
&& setjmp(restart
) != 0)
845 for (i
= 0; i
< spcl
.c_count
; i
++) {
846 if (readmapflag
|| spcl
.c_addr
[i
]) {
847 readtape(&buf
[curblk
++][0]);
848 if (curblk
== fssize
/ TP_BSIZE
) {
849 (*fill
)((char *)buf
, (size_t)(size
> TP_BSIZE
?
850 fssize
: (curblk
- 1) * TP_BSIZE
+ size
));
852 last_write_was_hole
= 0;
856 (*fill
)((char *)buf
, (size_t)(size
> TP_BSIZE
?
858 (curblk
- 1) * TP_BSIZE
+ size
));
861 (*skip
)(clearedbuf
, (long)(size
> TP_BSIZE
?
863 last_write_was_hole
= 1;
865 if ((size
-= TP_BSIZE
) <= 0) {
866 for (i
++; i
< spcl
.c_count
; i
++)
867 if (readmapflag
|| spcl
.c_addr
[i
])
872 if (gethead(&spcl
) == GOOD
&& size
> 0) {
873 if (spcl
.c_type
== TS_ADDR
)
876 "Missing address (header) block for %s at %ld blocks\n",
877 curfile
.name
, (long)blksread
);
880 (*fill
)((char *)buf
, (size_t)(curblk
* TP_BSIZE
) + size
);
881 last_write_was_hole
= 0;
884 fprintf(stderr
, "Missing blocks at the end of %s, assuming hole\n", curfile
.name
);
886 size_t skp
= size
> TP_BSIZE
? TP_BSIZE
: size
;
887 (*skip
)(clearedbuf
, skp
);
890 last_write_was_hole
= 1;
892 if (last_write_was_hole
) {
893 FTRUNCATE(ofile
, origsize
);
900 * Write out the next block of a file.
903 xtrfile(char *buf
, size_t size
)
908 if (write(ofile
, buf
, (int) size
) == -1)
909 err(1, "write error extracting inode %lu, name %s\nwrite",
910 (unsigned long)curfile
.ino
, curfile
.name
);
914 * Skip over a hole in a file.
918 xtrskip(char *buf
, size_t size
)
921 if (LSEEK(ofile
, (off_t
)size
, SEEK_CUR
) == -1)
922 err(1, "seek error extracting inode %lu, name %s\nlseek",
923 (unsigned long)curfile
.ino
, curfile
.name
);
927 * Collect the next block of a symbolic link.
930 xtrlnkfile(char *buf
, size_t size
)
934 if (pathlen
> MAXPATHLEN
)
935 errx(1, "symbolic link name: %s->%s%s; too long %d",
936 curfile
.name
, lnkbuf
, buf
, pathlen
);
937 (void) strcat(lnkbuf
, buf
);
941 * Skip over a hole in a symbolic link (should never happen).
945 xtrlnkskip(char *buf
, size_t size
)
948 errx(1, "unallocated block in symbolic link %s", curfile
.name
);
952 * Collect the next block of a bit map.
955 xtrmap(char *buf
, size_t size
)
958 memmove(map
, buf
, size
);
963 * Skip over a hole in a bit map (should never happen).
967 xtrmapskip(char *buf
, size_t size
)
970 panic("hole in map\n");
975 * Noop, when an extraction function is not needed.
979 xtrnull(char *buf
, size_t size
)
987 * Compare the next block of a file.
990 xtrcmpfile(char *buf
, size_t size
)
992 static char cmpbuf
[MAXBSIZE
];
997 if (read(ifile
, cmpbuf
, size
) != size
) {
998 fprintf(stderr
, "%s: size has changed.\n",
1004 if (memcmp(buf
, cmpbuf
, size
) != 0) {
1005 fprintf(stderr
, "%s: tape and disk copies are different\n",
1013 * Skip over a hole in a file.
1016 xtrcmpskip(char *buf
, size_t size
)
1018 static char cmpbuf
[MAXBSIZE
];
1024 if (read(ifile
, cmpbuf
, size
) != size
) {
1025 fprintf(stderr
, "%s: size has changed.\n",
1031 for (i
= 0; i
< size
; ++i
)
1032 if (cmpbuf
[i
] != '\0') {
1033 fprintf(stderr
, "%s: tape and disk copies are different\n",
1039 #endif /* COMPARE_ONTHEFLY */
1041 #if !COMPARE_ONTHEFLY
1043 do_cmpfiles(int fd_tape
, int fd_disk
, long size
)
1045 static char buf_tape
[BUFSIZ
];
1046 static char buf_disk
[BUFSIZ
];
1051 if ((n_tape
= read(fd_tape
, buf_tape
, sizeof(buf_tape
))) < 1) {
1052 close(fd_tape
), close(fd_disk
);
1053 panic("do_cmpfiles: unexpected EOF[1]");
1055 if ((n_disk
= read(fd_disk
, buf_disk
, sizeof(buf_tape
))) < 1) {
1056 close(fd_tape
), close(fd_disk
);
1057 panic("do_cmpfiles: unexpected EOF[2]");
1059 if (n_tape
!= n_disk
) {
1060 close(fd_tape
), close(fd_disk
);
1061 panic("do_cmpfiles: sizes different!");
1063 if (memcmp(buf_tape
, buf_disk
, (size_t)n_tape
) != 0) return (1);
1069 /* for debugging compare problems */
1070 #undef COMPARE_FAIL_KEEP_FILE
1073 #ifdef COMPARE_FAIL_KEEP_FILE
1074 /* return true if tapefile should be unlinked after compare */
1079 cmpfiles(char *tapefile
, char *diskfile
, struct STAT
*sbuf_disk
)
1081 struct STAT sbuf_tape
;
1082 int fd_tape
, fd_disk
;
1084 if (STAT(tapefile
, &sbuf_tape
) != 0) {
1085 panic("Can't lstat tmp file %s: %s\n", tapefile
,
1090 if (sbuf_disk
->st_size
!= sbuf_tape
.st_size
) {
1092 "%s: size changed from %ld to %ld.\n",
1093 diskfile
, (long)sbuf_tape
.st_size
, (long)sbuf_disk
->st_size
);
1095 #ifdef COMPARE_FAIL_KEEP_FILE
1102 if ((fd_tape
= OPEN(tapefile
, O_RDONLY
)) < 0) {
1103 panic("Can't open %s: %s\n", tapefile
, strerror(errno
));
1106 if ((fd_disk
= OPEN(diskfile
, O_RDONLY
)) < 0) {
1108 panic("Can't open %s: %s\n", diskfile
, strerror(errno
));
1112 if (do_cmpfiles(fd_tape
, fd_disk
, sbuf_tape
.st_size
)) {
1113 fprintf(stderr
, "%s: tape and disk copies are different\n",
1118 #ifdef COMPARE_FAIL_KEEP_FILE
1119 /* rename the file to live in /tmp */
1120 /* rename `tapefile' to /tmp/<basename of diskfile> */
1122 char *p
= strrchr(diskfile
, '/');
1123 char newname
[MAXPATHLEN
];
1125 panic("can't find / in %s\n", diskfile
);
1127 snprintf(newname
, sizeof(newname
), "%s/debug/%s", tmpdir
, p
+ 1);
1128 if (rename(tapefile
, newname
)) {
1129 panic("rename from %s to %s failed: %s\n",
1133 fprintf(stderr
, "*** %s saved to %s\n",
1138 /* don't unlink the file (it's not there anymore */
1147 #ifdef COMPARE_FAIL_KEEP_FILE
1151 #endif /* !COMPARE_ONTHEFLY */
1153 #if !COMPARE_ONTHEFLY
1154 static char tmpfilename
[MAXPATHLEN
];
1158 comparefile(char *name
)
1163 #if !COMPARE_ONTHEFLY
1164 static char *tmpfile
= NULL
;
1168 if ((r
= LSTAT(name
, &sb
)) != 0) {
1169 warn("%s: does not exist (%d)", name
, r
);
1175 curfile
.name
= name
;
1176 curfile
.action
= USING
;
1177 mode
= curfile
.dip
->di_mode
;
1179 Vprintf(stdout
, "comparing %s (size: %ld, mode: 0%o)\n", name
,
1180 (long)sb
.st_size
, mode
);
1182 if (sb
.st_mode
!= mode
) {
1183 fprintf(stderr
, "%s: mode changed from 0%o to 0%o.\n",
1184 name
, mode
& 07777, sb
.st_mode
& 07777);
1187 switch (mode
& IFMT
) {
1201 char lbuf
[MAXPATHLEN
+ 1];
1204 if (!(sb
.st_mode
& S_IFLNK
)) {
1205 fprintf(stderr
, "%s: is no longer a symbolic link\n",
1212 getfile(xtrlnkfile
, xtrlnkskip
);
1215 "%s: zero length symbolic link (ignored)\n",
1220 if ((lsize
= readlink(name
, lbuf
, MAXPATHLEN
)) < 0) {
1221 panic("readlink of %s failed: %s", name
,
1226 if (strcmp(lbuf
, lnkbuf
) != 0) {
1228 "%s: symbolic link changed from %s to %s.\n",
1229 name
, lnkbuf
, lbuf
);
1238 if (!(sb
.st_mode
& (S_IFCHR
|S_IFBLK
))) {
1239 fprintf(stderr
, "%s: no longer a special file\n",
1246 if (sb
.st_rdev
!= (int)curfile
.dip
->di_rdev
) {
1248 "%s: device changed from %d,%d to %d,%d.\n",
1250 ((int)curfile
.dip
->di_rdev
>> 8) & 0xff,
1251 (int)curfile
.dip
->di_rdev
& 0xff,
1252 ((int)sb
.st_rdev
>> 8) & 0xff,
1253 (int)sb
.st_rdev
& 0xff);
1260 #if COMPARE_ONTHEFLY
1261 if ((ifile
= OPEN(name
, O_RDONLY
)) < 0) {
1262 panic("Can't open %s: %s\n", name
, strerror(errno
));
1268 getfile(xtrcmpfile
, xtrcmpskip
);
1271 if (read(ifile
, &c
, 1) != 0) {
1272 fprintf(stderr
, "%s: size has changed.\n",
1282 if (tmpfile
== NULL
) {
1283 /* argument to mktemp() must not be in RO space: */
1284 snprintf(tmpfilename
, sizeof(tmpfilename
), "%s/restoreCXXXXXX", tmpdir
);
1285 tmpfile
= mktemp(&tmpfilename
[0]);
1287 if ((STAT(tmpfile
, &stemp
) == 0) && (unlink(tmpfile
) != 0)) {
1288 panic("cannot delete tmp file %s: %s\n",
1289 tmpfile
, strerror(errno
));
1291 if ((ofile
= OPEN(tmpfile
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0600)) < 0) {
1292 panic("cannot create file temp file %s: %s\n",
1293 name
, strerror(errno
));
1295 getfile(xtrfile
, xtrskip
);
1296 (void) close(ofile
);
1297 #ifdef COMPARE_FAIL_KEEP_FILE
1298 if (cmpfiles(tmpfile
, name
, &sb
))
1301 cmpfiles(tmpfile
, name
, &sb
);
1304 #endif /* COMPARE_ONTHEFLY */
1310 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1311 static void (*readtape_func
)(char *) = readtape_set
;
1314 * Read TP_BSIZE blocks from the input.
1315 * Handle read errors, and end of media.
1316 * Decompress compressed blocks.
1321 (*readtape_func
)(buf
); /* call the actual processing routine */
1325 * Set function pointer for readtape() routine. zflag and magtapein must
1326 * be correctly set before the first call to readtape().
1329 readtape_set(char *buf
)
1332 readtape_func
= readtape_uncompr
;
1336 readtape_func
= readtape_comprtape
;
1338 readtape_func
= readtape_comprfile
;
1343 #endif /* HAVE_ZLIB || HAVE_BZLIB */
1346 * This is the original readtape(), it's used for reading uncompressed input.
1347 * Read TP_BSIZE blocks from the input.
1348 * Handle read errors, and end of media.
1351 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1352 readtape_uncompr(char *buf
)
1357 ssize_t rd
, newvol
, i
;
1358 int cnt
, seek_failed
;
1360 if (blkcnt
< numtrec
) {
1361 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1367 for (i
= 0; i
< ntrec
; i
++)
1368 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1371 cnt
= ntrec
* TP_BSIZE
;
1376 i
= rmtread(&tapebuf
[rd
], cnt
);
1379 i
= read(mt
, &tapebuf
[rd
], cnt
);
1382 * Check for mid-tape short read error.
1383 * If found, skip rest of buffer and start with the next.
1385 if (!pipein
&& numtrec
< ntrec
&& i
> 0) {
1386 Dprintf(stdout
, "mid-media short read error.\n");
1390 * Handle partial block read.
1392 if (pipein
&& i
== 0 && rd
> 0)
1394 else if (i
> 0 && i
!= ntrec
* TP_BSIZE
) {
1403 * Short read. Process the blocks read.
1405 if (i
% TP_BSIZE
!= 0)
1407 "partial block read: %ld should be %ld\n",
1408 (long)i
, ntrec
* TP_BSIZE
);
1409 numtrec
= i
/ TP_BSIZE
;
1413 * Handle read error.
1416 fprintf(stderr
, "Tape read error while ");
1417 switch (curfile
.action
) {
1419 fprintf(stderr
, "trying to set up tape\n");
1422 fprintf(stderr
, "trying to resynchronize\n");
1425 fprintf(stderr
, "restoring %s\n", curfile
.name
);
1428 fprintf(stderr
, "skipping over inode %lu\n",
1429 (unsigned long)curfile
.ino
);
1432 if (!yflag
&& !reply("continue"))
1434 i
= ntrec
* TP_BSIZE
;
1435 memset(tapebuf
, 0, (size_t)i
);
1438 seek_failed
= (rmtseek(i
, 1) < 0);
1441 seek_failed
= (LSEEK(mt
, i
, SEEK_CUR
) == (off_t
)-1);
1444 warn("continuation failed");
1445 if (!yflag
&& !reply("assume end-of-tape and continue"))
1451 * Handle end of tape.
1454 Vprintf(stdout
, "End-of-tape encountered\n");
1463 if (rd
% TP_BSIZE
!= 0)
1464 panic("partial block read: %d should be %d\n",
1465 rd
, ntrec
* TP_BSIZE
);
1467 memmove(&tapebuf
[rd
], &endoftapemark
, TP_BSIZE
);
1470 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1475 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1478 * Read a compressed format block from a file or pipe and uncompress it.
1479 * Attempt to handle read errors, and end of file.
1482 readtape_comprfile(char *buf
)
1484 long rl
, size
, i
, ret
;
1486 struct tapebuf
*tpb
;
1488 if (blkcnt
< numtrec
) {
1489 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1494 /* need to read the next block */
1496 for (i
= 0; i
< ntrec
; i
++)
1497 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1499 tpb
= (struct tapebuf
*) tapebuf
;
1501 /* read the block prefix */
1502 ret
= read_a_block(mt
, tapebuf
, PREFIXSIZE
, &rl
);
1504 if (Vflag
&& (ret
== 0 || rl
< PREFIXSIZE
|| tpb
->length
== 0))
1511 if (size
> bufsize
) {
1512 /* something's wrong */
1513 Vprintf(stdout
, "Prefix size error, max size %d, got %ld\n",
1516 tpb
->length
= bufsize
;
1518 ret
= read_a_block(mt
, tpb
->buf
, size
, &rl
);
1522 tbufptr
= decompress_tapebuf(tpb
, rl
+ PREFIXSIZE
);
1523 if (tbufptr
== NULL
) {
1524 msg_read_error("File decompression error while");
1525 if (!yflag
&& !reply("continue"))
1527 memset(tapebuf
, 0, bufsize
);
1532 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1538 /* Errors while reading from a file or pipe are catastrophic. Since
1539 * there are no block boundaries, it's impossible to bypass the
1540 * block in error and find the start of the next block.
1543 /* It's possible to have multiple input files using -M
1544 * and -f file1,file2...
1546 Vprintf(stdout
, "End-of-File encountered\n");
1556 msg_read_error("Read error while");
1557 /* if (!yflag && !reply("continue")) */
1562 * Read compressed data from a tape and uncompress it.
1563 * Handle read errors, and end of media.
1564 * Since a tape consists of separate physical blocks, we try
1565 * to recover from errors by repositioning the tape to the next
1569 readtape_comprtape(char *buf
)
1573 struct tapebuf
*tpb
;
1576 if (blkcnt
< numtrec
) {
1577 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1582 /* need to read the next block */
1584 for (i
= 0; i
< ntrec
; i
++)
1585 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1587 tpb
= (struct tapebuf
*) tapebuf
;
1589 /* read the block */
1590 size
= bufsize
+ PREFIXSIZE
;
1591 ret
= read_a_block(mt
, tapebuf
, size
, &rl
);
1595 tbufptr
= decompress_tapebuf(tpb
, rl
);
1596 if (tbufptr
== NULL
) {
1597 msg_read_error("Tape decompression error while");
1598 if (!yflag
&& !reply("continue"))
1600 memset(tapebuf
, 0, PREFIXSIZE
+ bufsize
);
1606 /* Handle errors: EOT switches to the next volume, other errors
1607 * attempt to position the tape to the next block.
1610 Vprintf(stdout
, "End-of-tape encountered\n");
1619 msg_read_error("Tape read error while");
1620 if (!yflag
&& !reply("continue"))
1622 memset(tapebuf
, 0, PREFIXSIZE
+ bufsize
);
1627 rl
= rmtioctl(MTFSR
, 1);
1633 rl
= ioctl(mt
, MTIOCTOP
, &tcom
);
1637 warn("continuation failed");
1638 if (!yflag
&& !reply("assume end-of-tape and continue"))
1640 ret
= 0; /* end of tape */
1646 memmove(buf
, &tbufptr
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1652 * Decompress a struct tapebuf into a buffer. readsize is the size read
1653 * from the tape/file and is used for error messages. Returns a pointer
1654 * to the location of the uncompressed buffer or NULL on errors.
1655 * Adjust numtrec and complain for a short block.
1658 decompress_tapebuf(struct tapebuf
*tpbin
, int readsize
)
1660 /* If zflag is on, all blocks have a struct tapebuf prefix */
1661 /* zflag gets set in setup() from the dump header */
1662 int cresult
, blocklen
;
1663 unsigned long worklen
;
1665 unsigned int worklen2
;
1667 char *output
= NULL
,*reason
= NULL
, *lengtherr
= NULL
;
1669 /* build a length error message */
1670 blocklen
= tpbin
->length
;
1671 if (readsize
< blocklen
+ PREFIXSIZE
)
1672 lengtherr
= "short";
1674 if (readsize
> blocklen
+ PREFIXSIZE
)
1679 if (tpbin
->compressed
) {
1680 /* uncompress whatever we read, if it fails, complain later */
1681 if (tpbin
->flags
== COMPRESS_ZLIB
) {
1683 errx(1,"This restore version doesn't support zlib decompression");
1685 cresult
= uncompress(comprbuf
, &worklen
,
1686 tpbin
->buf
, blocklen
);
1692 reason
= "not enough memory";
1695 reason
= "buffer too small";
1698 reason
= "data error";
1703 if (cresult
== Z_OK
)
1707 #endif /* HAVE_ZLIB */
1709 if (tpbin
->flags
== COMPRESS_BZLIB
) {
1711 errx(1,"This restore version doesn't support bzlib decompression");
1714 cresult
= BZ2_bzBuffToBuffDecompress(
1715 comprbuf
, &worklen2
,
1716 tpbin
->buf
, blocklen
, 0, 0);
1723 reason
= "not enough memory";
1725 case BZ_OUTBUFF_FULL
:
1726 reason
= "buffer too small";
1729 case BZ_DATA_ERROR_MAGIC
:
1730 case BZ_UNEXPECTED_EOF
:
1731 reason
= "data error";
1736 if (cresult
== BZ_OK
)
1740 #endif /* HAVE_BZLIB */
1744 output
= tpbin
->buf
;
1748 numtrec
= worklen
/ TP_BSIZE
;
1749 if (worklen
% TP_BSIZE
!= 0)
1750 reason
= "length mismatch";
1754 fprintf(stderr
, "%s compressed block: %d expected: %d\n",
1755 lengtherr
, readsize
, tpbin
->length
+ PREFIXSIZE
);
1756 fprintf(stderr
, "decompression error, block %ld: %s\n",
1757 tpblksread
+1, reason
);
1765 * Print an error message for a read error.
1766 * This was exteracted from the original readtape().
1769 msg_read_error(char *m
)
1771 switch (curfile
.action
) {
1773 fprintf(stderr
, "%s trying to set up tape\n", m
);
1776 fprintf(stderr
, "%s trying to resynchronize\n", m
);
1779 fprintf(stderr
, "%s restoring %s\n", m
, curfile
.name
);
1782 fprintf(stderr
, "%s skipping over inode %lu\n", m
,
1783 (unsigned long)curfile
.ino
);
1787 #endif /* HAVE_ZLIB || HAVE_BZLIB */
1790 * Read the first block and get the blocksize from it. Test
1791 * for a compressed dump tape/file. setup() will make the final
1792 * determination by checking the compressed flag if gethead()
1793 * finds a valid header. The test here is necessary to offset the buffer
1794 * by the size of the compressed prefix. zflag is set here so that
1795 * readtape_set can set the correct function pointer for readtape().
1796 * Note that the first block of each tape/file is not compressed
1797 * and does not have a prefix.
1800 findtapeblksize(void)
1804 struct tapebuf
*tpb
= (struct tapebuf
*) tapebuf
;
1805 struct s_spcl
*spclpt
= (struct s_spcl
*) tapebuf
;
1807 for (i
= 0; i
< ntrec
; i
++)
1808 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1812 * For a pipe or file, read in the first record. For a tape, read
1815 len
= magtapein
? ntrec
* TP_BSIZE
: TP_BSIZE
;
1817 if (read_a_block(mt
, tapebuf
, len
, &i
) <= 0)
1818 errx(1, "Tape read error on first record");
1821 * If the input is from a file or a pipe, we read TP_BSIZE
1822 * bytes looking for a dump header. If the dump is compressed
1823 * we need to read in the rest of the block, as determined
1824 * by c_ntrec in the dump header. The first block of the
1825 * dump is not compressed and does not have a prefix.
1828 if (spclpt
->c_type
== TS_TAPE
1829 && spclpt
->c_flags
& DR_COMPRESSED
) {
1830 /* It's a compressed dump file, read in the */
1831 /* rest of the block based on spclpt->c_ntrec. */
1832 if (spclpt
->c_ntrec
> ntrec
)
1833 errx(1, "Tape blocksize is too large, use "
1834 "\'-b %d\' ", spclpt
->c_ntrec
);
1835 ntrec
= spclpt
->c_ntrec
;
1836 len
= (ntrec
- 1) * TP_BSIZE
;
1840 /* read in the rest of the block based on bufsize */
1841 len
= bufsize
- TP_BSIZE
;
1843 if (read_a_block(mt
, tapebuf
+TP_BSIZE
, len
, &i
) < 0
1844 || (i
!= len
&& i
% TP_BSIZE
!= 0))
1845 errx(1,"Error reading dump file header");
1848 Vprintf(stdout
, "Input block size is %ld\n", ntrec
);
1850 } /* if (!magtapein) */
1853 * If the input is a tape, we tried to read ntrec * TP_BSIZE bytes.
1854 * If the value of ntrec is too large, we read less than
1855 * what we asked for; adjust the value of ntrec and test for
1856 * a compressed dump tape.
1859 if (i
% TP_BSIZE
!= 0) {
1860 /* may be old format compressed dump tape with a prefix */
1861 spclpt
= (struct s_spcl
*) tpb
->buf
;
1862 if (i
% TP_BSIZE
== PREFIXSIZE
1863 && tpb
->compressed
== 0
1864 && spclpt
->c_type
== TS_TAPE
1865 && spclpt
->c_flags
& DR_COMPRESSED
) {
1868 if (tpb
->length
> bufsize
)
1869 errx(1, "Tape blocksize is too large, use "
1870 "\'-b %d\' ", tpb
->length
/ TP_BSIZE
);
1873 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
1876 ntrec
= i
/ TP_BSIZE
;
1877 if (spclpt
->c_type
== TS_TAPE
) {
1878 if (spclpt
->c_flags
& DR_COMPRESSED
)
1880 if (spclpt
->c_ntrec
> ntrec
)
1881 errx(1, "Tape blocksize is too large, use "
1882 "\'-b %d\' ", spclpt
->c_ntrec
);
1885 Vprintf(stdout
, "Tape block size is %ld\n", ntrec
);
1889 * Read a block of data handling all of the messy details.
1891 static int read_a_block(int fd
, char *buf
, size_t len
, long *lengthread
)
1899 i
= rmtread(buf
, size
);
1902 i
= read(fd
, buf
, size
);
1905 break; /* EOD or error */
1908 break; /* block at a time for mt */
1911 *lengthread
= len
- size
;
1930 setmagtapein(void) {
1931 struct mtget mt_stat
;
1932 static int done
= 0;
1937 /* need to know if input is really from a tape */
1943 magtapein
= ioctl(mt
, MTIOCGET
, (char *)&mt_stat
) == 0;
1946 Vprintf(stdout
,"Input is from %s\n",
1947 magtapein
? "tape" :
1948 Vflag
? "multi-volume (no tape)" : "file/pipe");
1952 * Read the next block from the tape.
1953 * Check to see if it is one of several vintage headers.
1954 * If it is an old style header, convert it to a new style header.
1955 * If it is not any valid header, return an error.
1958 gethead(struct s_spcl
*buf
)
1966 char dummy
[TP_BSIZE
];
1973 u_int16_t c_inumber
;
1978 u_int16_t odi_nlink
;
1994 readtape((char *)buf
);
1995 if (buf
->c_magic
!= NFS_MAGIC
) {
1996 if (swabi(buf
->c_magic
) != NFS_MAGIC
)
1999 Vprintf(stdout
, "Note: Doing Byte swapping\n");
2003 if (checksum((int *)buf
) == FAIL
)
2006 swabst((u_char
*)"8i4s31i528bi192b2i", (u_char
*)buf
);
2009 readtape((char *)(&u_ospcl
.s_ospcl
));
2010 memset((char *)buf
, 0, (long)TP_BSIZE
);
2011 buf
->c_type
= u_ospcl
.s_ospcl
.c_type
;
2012 buf
->c_date
= u_ospcl
.s_ospcl
.c_date
;
2013 buf
->c_ddate
= u_ospcl
.s_ospcl
.c_ddate
;
2014 buf
->c_volume
= u_ospcl
.s_ospcl
.c_volume
;
2015 buf
->c_tapea
= u_ospcl
.s_ospcl
.c_tapea
;
2016 buf
->c_inumber
= u_ospcl
.s_ospcl
.c_inumber
;
2017 buf
->c_checksum
= u_ospcl
.s_ospcl
.c_checksum
;
2018 buf
->c_magic
= u_ospcl
.s_ospcl
.c_magic
;
2019 buf
->c_dinode
.di_mode
= u_ospcl
.s_ospcl
.c_dinode
.odi_mode
;
2020 buf
->c_dinode
.di_nlink
= u_ospcl
.s_ospcl
.c_dinode
.odi_nlink
;
2021 buf
->c_dinode
.di_uid
= u_ospcl
.s_ospcl
.c_dinode
.odi_uid
;
2022 buf
->c_dinode
.di_gid
= u_ospcl
.s_ospcl
.c_dinode
.odi_gid
;
2023 buf
->c_dinode
.di_size
= u_ospcl
.s_ospcl
.c_dinode
.odi_size
;
2024 buf
->c_dinode
.di_rdev
= u_ospcl
.s_ospcl
.c_dinode
.odi_rdev
;
2026 buf
->c_dinode
.di_atime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_atime
;
2027 buf
->c_dinode
.di_mtime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_mtime
;
2028 buf
->c_dinode
.di_ctime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_ctime
;
2029 #else /* __linux__ */
2030 buf
->c_dinode
.di_atime
= u_ospcl
.s_ospcl
.c_dinode
.odi_atime
;
2031 buf
->c_dinode
.di_mtime
= u_ospcl
.s_ospcl
.c_dinode
.odi_mtime
;
2032 buf
->c_dinode
.di_ctime
= u_ospcl
.s_ospcl
.c_dinode
.odi_ctime
;
2033 #endif /* __linux__ */
2034 buf
->c_count
= u_ospcl
.s_ospcl
.c_count
;
2035 memmove(buf
->c_addr
, u_ospcl
.s_ospcl
.c_addr
, (long)256);
2036 if (u_ospcl
.s_ospcl
.c_magic
!= OFS_MAGIC
||
2037 checksum((int *)(&u_ospcl
.s_ospcl
)) == FAIL
)
2039 buf
->c_magic
= NFS_MAGIC
;
2042 if ((buf
->c_dinode
.di_size
== 0 || buf
->c_dinode
.di_size
> 0xfffffff) &&
2043 (buf
->c_dinode
.di_mode
& IFMT
) == IFDIR
&& Qcvt
== 0) {
2044 qcvt
.qval
= buf
->c_dinode
.di_size
;
2045 if (qcvt
.val
[0] || qcvt
.val
[1]) {
2046 printf("Note: Doing Quad swapping\n");
2051 qcvt
.qval
= buf
->c_dinode
.di_size
;
2053 qcvt
.val
[1] = qcvt
.val
[0];
2055 buf
->c_dinode
.di_size
= qcvt
.qval
;
2059 switch (buf
->c_type
) {
2064 * Have to patch up missing information in bit map headers
2067 buf
->c_dinode
.di_size
= buf
->c_count
* TP_BSIZE
;
2068 if (buf
->c_count
> TP_NINDIR
)
2071 for (i
= 0; i
< buf
->c_count
; i
++)
2076 if ((buf
->c_flags
& DR_NEWINODEFMT
) == 0)
2088 panic("gethead: unknown inode type %d\n", buf
->c_type
);
2092 * If we are restoring a filesystem with old format inodes,
2093 * copy the uid/gid to the new location.
2096 buf
->c_dinode
.di_uid
= buf
->c_dinode
.di_ouid
;
2097 buf
->c_dinode
.di_gid
= buf
->c_dinode
.di_ogid
;
2105 * Check that a header is where it belongs and predict the next header
2108 accthdr(struct s_spcl
*header
)
2110 static dump_ino_t previno
= 0x7fffffff;
2111 static int prevtype
;
2112 static long predict
;
2115 if (header
->c_type
== TS_TAPE
) {
2116 fprintf(stderr
, "Volume header (%s inode format) ",
2117 oldinofmt
? "old" : "new");
2118 if (header
->c_firstrec
)
2119 fprintf(stderr
, "begins with record %d",
2120 header
->c_firstrec
);
2121 fprintf(stderr
, "\n");
2122 previno
= 0x7fffffff;
2125 if (previno
== 0x7fffffff)
2129 fprintf(stderr
, "Dumped inodes map header");
2132 fprintf(stderr
, "Used inodes map header");
2135 fprintf(stderr
, "File header, ino %lu", (unsigned long)previno
);
2138 fprintf(stderr
, "File continuation header, ino %ld", (long)previno
);
2141 fprintf(stderr
, "End of tape header");
2144 if (predict
!= blksread
- 1)
2145 fprintf(stderr
, "; predicted %ld blocks, got %ld blocks",
2146 predict
, blksread
- 1);
2147 fprintf(stderr
, "\n");
2150 if (header
->c_type
!= TS_END
)
2151 for (i
= 0; i
< header
->c_count
; i
++)
2152 if (readmapflag
|| header
->c_addr
[i
] != 0)
2156 prevtype
= header
->c_type
;
2157 previno
= header
->c_inumber
;
2161 * Find an inode header.
2162 * Complain if had to skip, and complain is set.
2165 findinode(struct s_spcl
*header
)
2167 static long skipcnt
= 0;
2171 curfile
.name
= "<name unknown>";
2172 curfile
.action
= UNKNOWN
;
2176 if (header
->c_magic
!= NFS_MAGIC
) {
2178 while (gethead(header
) == FAIL
||
2179 header
->c_date
!= dumpdate
)
2182 switch (header
->c_type
) {
2186 * Skip up to the beginning of the next record
2188 for (i
= 0; i
< header
->c_count
; i
++)
2189 if (header
->c_addr
[i
])
2191 while (gethead(header
) == FAIL
||
2192 header
->c_date
!= dumpdate
)
2197 curfile
.dip
= &header
->c_dinode
;
2198 curfile
.ino
= header
->c_inumber
;
2202 curfile
.ino
= maxino
;
2206 curfile
.name
= "<file removal list>";
2210 curfile
.name
= "<file dump list>";
2214 panic("unexpected tape header\n");
2218 panic("unknown tape header type %d\n", spcl
.c_type
);
2222 } while (header
->c_type
== TS_ADDR
);
2227 fprintf(stderr
, "resync restore, skipped %ld blocks\n",
2237 j
= sizeof(union u_spcl
) / sizeof(int);
2244 /* What happens if we want to read restore tapes
2245 for a 16bit int machine??? */
2251 if (i
!= CHECKSUM
) {
2252 fprintf(stderr
, "Checksum error %o, inode %lu file %s\n", i
,
2253 (unsigned long)curfile
.ino
, curfile
.name
);
2263 #include <varargs.h>
2268 msg(const char *fmt
, ...)
2281 (void)vfprintf(stderr
, fmt
, ap
);
2284 #endif /* RRESTORE */
2287 swab16(u_char
*sp
, int n
)
2292 c
= sp
[0]; sp
[0] = sp
[1]; sp
[1] = c
;
2299 swab32(u_char
*sp
, int n
)
2304 c
= sp
[0]; sp
[0] = sp
[3]; sp
[3] = c
;
2305 c
= sp
[1]; sp
[1] = sp
[2]; sp
[2] = c
;
2312 swab64(u_char
*sp
, int n
)
2317 c
= sp
[0]; sp
[0] = sp
[7]; sp
[7] = c
;
2318 c
= sp
[1]; sp
[1] = sp
[6]; sp
[6] = c
;
2319 c
= sp
[2]; sp
[2] = sp
[5]; sp
[5] = c
;
2320 c
= sp
[3]; sp
[3] = sp
[4]; sp
[4] = c
;
2327 swabst(u_char
*cp
, u_char
*sp
)
2333 case '0': case '1': case '2': case '3': case '4':
2334 case '5': case '6': case '7': case '8': case '9':
2335 n
= (n
* 10) + (*cp
++ - '0');
2338 case 's': case 'w': case 'h':
2356 default: /* Any other character, like 'b' counts as byte. */
2370 swabst((u_char
*)"i", (u_char
*)&x
);
2378 swabst((u_char
*)"l", (u_char
*)&x
);
2385 * get the current position of the tape
2388 GetTapePos(long *pos
)
2394 err
= (ioctl(mt
, MTIOCPOS
, pos
) < 0);
2397 *pos
= lseek(mt
, 0, SEEK_CUR
);
2402 fprintf(stdout
, "[%ld] error: %d (getting tapepos: %ld)\n",
2403 (unsigned long)getpid(), err
, *pos
);
2409 typedef struct mt_pos
{
2412 } MTPosRec
, *MTPosPtr
;
2415 * go to specified position on tape
2418 GotoTapePos(long pos
)
2426 err
= (ioctl(mt
, MTIOCTOP
, &buf
) < 0);
2429 pos
= lseek(mt
, pos
, SEEK_SET
);
2434 fprintf(stdout
, "[%ld] error: %d (setting tapepos: %ld)\n",
2435 (unsigned long)getpid(), err
, pos
);
2442 * read next data from tape to re-sync
2445 ReReadFromTape(void)
2449 if (gethead(&spcl
) == FAIL
) {
2451 fprintf(stdout
, "DEBUG 1 gethead failed\n");
2459 RequestVol(long tnum
)
2464 #endif /* USE_QFA */