]>
git.wh0rd.org - dump.git/blob - restore/tape.c
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 <pop@cybercable.fr>, 1999
9 * Copyright (c) 1983, 1993
10 * The Regents of the University of California. All rights reserved.
11 * (c) UNIX System Laboratories, Inc.
12 * All or some portions of this file are derived from material licensed
13 * to the University of California by American Telephone and Telegraph
14 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
15 * the permission of UNIX System Laboratories, Inc.
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution.
25 * 3. All advertising materials mentioning features or use of this software
26 * must display the following acknowledgement:
27 * This product includes software developed by the University of
28 * California, Berkeley and its contributors.
29 * 4. Neither the name of the University nor the names of its contributors
30 * may be used to endorse or promote products derived from this software
31 * without specific prior written permission.
33 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
34 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
35 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
36 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
37 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
38 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
39 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
41 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
42 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47 static const char rcsid
[] =
48 "$Id: tape.c,v 1.7 1999/11/05 22:02:19 tiniou Exp $";
51 #include <sys/param.h>
58 #include <linux/ext2_fs.h>
59 #include <bsdcompat.h>
61 #include <ufs/ufs/dinode.h>
62 #endif /* __linux__ */
63 #include <protocols/dumprestore.h>
66 #include <compaterr.h>
74 #include <ext2fs/ext2fs.h>
79 #include "pathnames.h"
81 static long fssize
= MAXBSIZE
;
83 static int pipein
= 0;
88 static union u_spcl endoftapemark
;
89 static long blksread
; /* blocks read since last header */
90 static long tpblksread
= 0; /* TP_BSIZE blocks read */
91 static long tapesread
;
92 static sigjmp_buf restart
;
93 static int gettingfile
= 0; /* restart has a valid frame */
94 static char *host
= NULL
;
98 static char lnkbuf
[MAXPATHLEN
+ 1];
101 int oldinofmt
; /* old inode format conversion required */
102 int Bcvt
; /* Swap Bytes (for CCI or sun) */
103 static int Qcvt
; /* Swap quads (for sun) */
105 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
107 static void accthdr
__P((struct s_spcl
*));
108 static int checksum
__P((int *));
109 static void findinode
__P((struct s_spcl
*));
110 static void findtapeblksize
__P((void));
111 static int gethead
__P((struct s_spcl
*));
112 static void readtape
__P((char *));
113 static void setdumpnum
__P((void));
114 static u_int swabi
__P((u_int
));
115 static u_long swabl
__P((u_long
));
116 static u_char
*swab64
__P((u_char
*, int));
117 static u_char
*swab32
__P((u_char
*, int));
118 static u_char
*swab16
__P((u_char
*, int));
119 static void terminateinput
__P((void));
120 static void xtrfile
__P((char *, size_t));
121 static void xtrlnkfile
__P((char *, size_t));
122 static void xtrlnkskip
__P((char *, size_t));
123 static void xtrmap
__P((char *, size_t));
124 static void xtrmapskip
__P((char *, size_t));
125 static void xtrskip
__P((char *, size_t));
127 static int readmapflag
;
130 * Set up an input source
133 setinput(char *source
)
139 newtapebuf(NTREC
> HIGHDENSITYTREC
? NTREC
: HIGHDENSITYTREC
);
143 if (strchr(source
, ':')) {
145 source
= strchr(host
, ':');
147 if (rmthost(host
) == 0)
151 if (strcmp(source
, "-") == 0) {
153 * Since input is coming from a pipe we must establish
154 * our own connection to the terminal.
156 terminal
= fopen(_PATH_TTY
, "r");
157 if (terminal
== NULL
) {
158 warn("cannot open %s", _PATH_TTY
);
159 terminal
= fopen(_PATH_DEVNULL
, "r");
160 if (terminal
== NULL
)
161 err(1, "cannot open %s", _PATH_DEVNULL
);
165 setuid(getuid()); /* no longer need or want root privileges */
166 magtape
= strdup(source
);
168 errx(1, "Cannot allocate space for magtape buffer");
172 newtapebuf(long size
)
174 static int tapebufsize
= -1;
177 if (size
<= tapebufsize
)
181 tapebuf
= malloc(size
* TP_BSIZE
);
183 errx(1, "Cannot allocate space for tape buffer");
188 * Verify that the tape drive can be accessed and
189 * that it actually is a dump tape.
197 Vprintf(stdout
, "Verify tape and initialize maps\n");
200 mt
= rmtopen(magtape
, 0);
206 mt
= open(magtape
, O_RDONLY
, 0);
208 err(1, "%s", magtape
);
212 if (!pipein
&& !bflag
)
214 if (gethead(&spcl
) == FAIL
) {
215 blkcnt
--; /* push back this block */
219 if (gethead(&spcl
) == FAIL
)
220 errx(1, "Tape is not a dump tape");
221 fprintf(stderr
, "Converting to new file system format.\n");
224 endoftapemark
.s_spcl
.c_magic
= cvtflag
? OFS_MAGIC
: NFS_MAGIC
;
225 endoftapemark
.s_spcl
.c_type
= TS_END
;
226 ip
= (int *)&endoftapemark
;
227 j
= sizeof(union u_spcl
) / sizeof(int);
232 endoftapemark
.s_spcl
.c_checksum
= CHECKSUM
- i
;
234 if (vflag
|| command
== 't' || command
== 'C')
236 if (filesys
== NULL
) {
237 filesys
= spcl
.c_filesys
;
239 dumptime
= spcl
.c_ddate
;
240 dumpdate
= spcl
.c_date
;
241 if (stat(".", &stbuf
) < 0)
242 err(1, "cannot stat .");
243 if (stbuf
.st_blksize
> 0 && stbuf
.st_blksize
< TP_BSIZE
)
245 if (stbuf
.st_blksize
>= TP_BSIZE
&& stbuf
.st_blksize
<= MAXBSIZE
)
246 fssize
= stbuf
.st_blksize
;
247 if (((fssize
- 1) & fssize
) != 0)
248 errx(1, "bad block size %ld", fssize
);
249 if (spcl
.c_volume
!= 1)
250 errx(1, "Tape is not volume 1 of the dump");
251 if (gethead(&spcl
) == FAIL
) {
252 Dprintf(stdout
, "header read failed at %ld blocks\n", (long)blksread
);
253 panic("no header after volume mark!\n");
256 if (spcl
.c_type
!= TS_CLRI
)
257 errx(1, "Cannot find file removal list");
258 maxino
= (spcl
.c_count
* TP_BSIZE
* NBBY
) + 1;
259 Dprintf(stdout
, "maxino = %ld\n", maxino
);
260 map
= calloc((unsigned)1, (unsigned)howmany(maxino
, NBBY
));
262 panic("no memory for active inode map\n");
264 curfile
.action
= USING
;
265 getfile(xtrmap
, xtrmapskip
);
266 if (spcl
.c_type
!= TS_BITS
)
267 errx(1, "Cannot find file dump list");
268 map
= calloc((unsigned)1, (unsigned)howmany(maxino
, NBBY
));
269 if (map
== (char *)NULL
)
270 panic("no memory for file dump list\n");
272 curfile
.action
= USING
;
273 getfile(xtrmap
, xtrmapskip
);
275 * If there may be whiteout entries on the tape, pretend that the
276 * whiteout inode exists, so that the whiteout entries can be
280 SETINO(WINO
, dumpmap
);
284 * Prompt user to load a new dump volume.
285 * "Nextvol" is the next suggested volume to use.
286 * This suggested volume is enforced when doing full
287 * or incremental restores, but can be overridden by
288 * the user when only extracting a subset of the files.
293 long newvol
= 0, savecnt
= 0, wantnext
= 0, i
;
294 union u_spcl tmpspcl
;
295 # define tmpbuf tmpspcl.s_spcl
304 panic("Changing volumes on pipe input?\n");
312 exit(1); /* pipes do not get a second chance */
313 if (command
== 'R' || command
== 'r' || curfile
.action
!= SKIP
) {
320 while (newvol
<= 0) {
321 if (tapesread
== 0) {
322 fprintf(stderr
, "%s%s%s%s%s",
323 "You have not read any tapes yet.\n",
324 "Unless you know which volume your",
325 " file(s) are on you should start\n",
326 "with the last volume and work",
327 " towards the first.\n");
329 fprintf(stderr
, "You have read volumes");
331 for (i
= 1; i
< 32; i
++)
332 if (tapesread
& (1 << i
)) {
333 fprintf(stderr
, "%s%ld", buf
, (long)i
);
336 fprintf(stderr
, "\n");
339 fprintf(stderr
, "Specify next volume #: ");
340 (void) fflush(stderr
);
341 (void) fgets(buf
, BUFSIZ
, terminal
);
342 } while (!feof(terminal
) && buf
[0] == '\n');
348 "Volume numbers are positive numerics\n");
351 if (newvol
== volno
) {
352 tapesread
|= 1 << volno
;
356 fprintf(stderr
, "Mount tape volume %ld\n", (long)newvol
);
357 fprintf(stderr
, "Enter ``none'' if there are no more tapes\n");
358 fprintf(stderr
, "otherwise enter tape name (default: %s) ", magtape
);
359 (void) fflush(stderr
);
360 (void) fgets(buf
, BUFSIZ
, terminal
);
363 if (!strcmp(buf
, "none\n")) {
367 if (buf
[0] != '\n') {
368 (void) strcpy(magtape
, buf
);
369 magtape
[strlen(magtape
) - 1] = '\0';
373 mt
= rmtopen(magtape
, 0);
376 mt
= open(magtape
, O_RDONLY
, 0);
379 fprintf(stderr
, "Cannot open %s\n", magtape
);
387 if (gethead(&tmpbuf
) == FAIL
) {
388 Dprintf(stdout
, "header read failed at %ld blocks\n", (long)blksread
);
389 fprintf(stderr
, "tape is not dump tape\n");
393 if (tmpbuf
.c_volume
!= volno
) {
394 fprintf(stderr
, "Wrong volume (%d)\n", tmpbuf
.c_volume
);
398 if (tmpbuf
.c_date
!= dumpdate
|| tmpbuf
.c_ddate
!= dumptime
) {
400 fprintf(stderr
, "Wrong dump date\n\tgot: %s",
401 ctime4(&tmpbuf
.c_date
));
402 fprintf(stderr
, "\twanted: %s", ctime4(&dumpdate
));
404 fprintf(stderr
, "Wrong dump date\n\tgot: %s",
405 ctime(&tmpbuf
.c_date
));
406 fprintf(stderr
, "\twanted: %s", ctime(&dumpdate
));
411 tapesread
|= 1 << volno
;
414 * If continuing from the previous volume, skip over any
415 * blocks read already at the end of the previous volume.
417 * If coming to this volume at random, skip to the beginning
418 * of the next record.
420 Dprintf(stdout
, "read %ld recs, tape starts with %ld\n",
421 tpblksread
, (long)tmpbuf
.c_firstrec
);
422 if (tmpbuf
.c_type
== TS_TAPE
&& (tmpbuf
.c_flags
& DR_NEWHEADER
)) {
424 tpblksread
= tmpbuf
.c_firstrec
;
425 for (i
= tmpbuf
.c_count
; i
> 0; i
--)
427 } else if (tmpbuf
.c_firstrec
> 0 &&
428 tmpbuf
.c_firstrec
< tpblksread
- 1) {
430 * -1 since we've read the volume header
432 i
= tpblksread
- tmpbuf
.c_firstrec
- 1;
433 Dprintf(stderr
, "Skipping %ld duplicate record%s.\n",
434 (long)i
, i
> 1 ? "s" : "");
439 if (curfile
.action
== USING
) {
441 panic("active file into volume 1\n");
445 * Skip up to the beginning of the next record
447 if (tmpbuf
.c_type
== TS_TAPE
&& (tmpbuf
.c_flags
& DR_NEWHEADER
))
448 for (i
= tmpbuf
.c_count
; i
> 0; i
--)
450 (void) gethead(&spcl
);
454 siglongjmp(restart
, 1);
459 * Handle unexpected EOF.
465 if (gettingfile
&& curfile
.action
== USING
) {
466 printf("Warning: %s %s\n",
467 "End-of-input encountered while extracting", curfile
.name
);
469 curfile
.name
= "<name unknown>";
470 curfile
.action
= UNKNOWN
;
472 curfile
.ino
= maxino
;
475 siglongjmp(restart
, 1);
480 * handle multiple dumps per tape by skipping forward to the
488 if (dumpnum
== 1 || volno
!= 1)
491 errx(1, "Cannot have multiple dumps on pipe input");
493 tcom
.mt_count
= dumpnum
- 1;
496 rmtioctl(MTFSF
, dumpnum
- 1);
499 if (ioctl(mt
, (int)MTIOCTOP
, (char *)&tcom
) < 0)
507 fprintf(stdout
, "Dump date: %s", ctime4(&spcl
.c_date
));
508 fprintf(stdout
, "Dumped from: %s",
509 (spcl
.c_ddate
== 0) ? "the epoch\n" : ctime4(&spcl
.c_ddate
));
511 fprintf(stdout
, "Dump date: %s", ctime(&spcl
.c_date
));
512 fprintf(stdout
, "Dumped from: %s",
513 (spcl
.c_ddate
== 0) ? "the epoch\n" : ctime(&spcl
.c_ddate
));
515 if (spcl
.c_host
[0] == '\0')
517 fprintf(stderr
, "Level %d dump of %s on %s:%s\n",
518 spcl
.c_level
, spcl
.c_filesys
, spcl
.c_host
, spcl
.c_dev
);
519 fprintf(stderr
, "Label: %s\n", spcl
.c_label
);
523 extractfile(char *name
)
527 struct timeval timep
[2];
531 curfile
.action
= USING
;
533 timep
[0].tv_sec
= curfile
.dip
->di_atime
.tv_sec
;
534 timep
[0].tv_usec
= curfile
.dip
->di_atime
.tv_usec
;
535 timep
[1].tv_sec
= curfile
.dip
->di_mtime
.tv_sec
;
536 timep
[1].tv_usec
= curfile
.dip
->di_mtime
.tv_usec
;
537 #else /* __linux__ */
538 timep
[0].tv_sec
= curfile
.dip
->di_atime
;
539 timep
[0].tv_usec
= curfile
.dip
->di_atimensec
/ 1000;
540 timep
[1].tv_sec
= curfile
.dip
->di_mtime
;
541 timep
[1].tv_usec
= curfile
.dip
->di_mtimensec
/ 1000;
542 #endif /* __linux__ */
543 mode
= curfile
.dip
->di_mode
;
544 flags
= curfile
.dip
->di_flags
;
545 switch (mode
& IFMT
) {
548 fprintf(stderr
, "%s: unknown file mode 0%o\n", name
, mode
);
553 Vprintf(stdout
, "skipped socket %s\n", name
);
559 ep
= lookupname(name
);
560 if (ep
== NULL
|| ep
->e_flags
& EXTRACT
)
561 panic("unextracted directory %s\n", name
);
565 Vprintf(stdout
, "extract file %s\n", name
);
566 return (genliteraldir(name
, curfile
.ino
));
569 { uid_t luid
= curfile
.dip
->di_uid
;
570 gid_t lgid
= curfile
.dip
->di_gid
;
574 getfile(xtrlnkfile
, xtrlnkskip
);
577 "%s: zero length symbolic link (ignored)\n", name
);
580 if (linkit(lnkbuf
, name
, SYMLINK
) == FAIL
)
583 (void) lchown(name
, luid
, lgid
);
589 Vprintf(stdout
, "extract fifo %s\n", name
);
596 if (mkfifo(name
, mode
) < 0) {
597 warn("%s: cannot create fifo", name
);
601 (void) chown(name
, curfile
.dip
->di_uid
, curfile
.dip
->di_gid
);
602 (void) chmod(name
, mode
);
605 (void) fsetflags(name
, flags
);
607 (void) chflags(name
, flags
);
615 Vprintf(stdout
, "extract special file %s\n", name
);
622 if (mknod(name
, mode
, (int)curfile
.dip
->di_rdev
) < 0) {
623 warn("%s: cannot create special file", name
);
627 (void) chown(name
, curfile
.dip
->di_uid
, curfile
.dip
->di_gid
);
628 (void) chmod(name
, mode
);
632 warn("%s: fsetflags called on a special file", name
);
633 (void) fsetflags(name
, flags
);
636 (void) chflags(name
, flags
);
643 Vprintf(stdout
, "extract file %s\n", name
);
650 if ((ofile
= open(name
, O_WRONLY
| O_CREAT
| O_TRUNC
,
652 warn("%s: cannot create file", name
);
656 (void) fchown(ofile
, curfile
.dip
->di_uid
, curfile
.dip
->di_gid
);
657 (void) fchmod(ofile
, mode
);
660 (void) setflags(ofile
, flags
);
662 (void) fchflags(ofile
, flags
);
664 getfile(xtrfile
, xtrskip
);
673 * skip over bit maps on the tape
679 while (spcl
.c_type
== TS_BITS
|| spcl
.c_type
== TS_CLRI
)
684 * skip over a file on the tape
690 curfile
.action
= SKIP
;
691 getfile(xtrnull
, xtrnull
);
695 * Extract a file from the tape.
696 * When an allocated block is found it is passed to the fill function;
697 * when an unallocated block (hole) is found, a zeroed buffer is passed
698 * to the skip function.
701 getfile(void (*fill
) __P((char *, size_t)), void (*skip
) __P((char *, size_t)))
704 volatile int curblk
= 0;
705 volatile quad_t size
= spcl
.c_dinode
.di_size
;
706 volatile int last_write_was_hole
= 0;
707 quad_t origsize
= size
;
708 static char clearedbuf
[MAXBSIZE
];
709 char buf
[MAXBSIZE
/ TP_BSIZE
][TP_BSIZE
];
712 if (spcl
.c_type
== TS_END
)
713 panic("ran off end of tape\n");
714 if (spcl
.c_magic
!= NFS_MAGIC
)
715 panic("not at beginning of a file\n");
716 if (!gettingfile
&& setjmp(restart
) != 0)
720 for (i
= 0; i
< spcl
.c_count
; i
++) {
721 if (readmapflag
|| spcl
.c_addr
[i
]) {
722 readtape(&buf
[curblk
++][0]);
723 if (curblk
== fssize
/ TP_BSIZE
) {
724 (*fill
)((char *)buf
, (size_t)(size
> TP_BSIZE
?
725 fssize
: (curblk
- 1) * TP_BSIZE
+ size
));
727 last_write_was_hole
= 0;
731 (*fill
)((char *)buf
, (size_t)(size
> TP_BSIZE
?
733 (curblk
- 1) * TP_BSIZE
+ size
));
736 (*skip
)(clearedbuf
, (long)(size
> TP_BSIZE
?
738 last_write_was_hole
= 1;
740 if ((size
-= TP_BSIZE
) <= 0) {
741 for (i
++; i
< spcl
.c_count
; i
++)
742 if (readmapflag
|| spcl
.c_addr
[i
])
747 if (gethead(&spcl
) == GOOD
&& size
> 0) {
748 if (spcl
.c_type
== TS_ADDR
)
751 "Missing address (header) block for %s at %ld blocks\n",
752 curfile
.name
, (long)blksread
);
755 (*fill
)((char *)buf
, (size_t)(curblk
* TP_BSIZE
) + size
);
756 last_write_was_hole
= 0;
758 if (last_write_was_hole
) {
759 ftruncate(ofile
, origsize
);
766 * Write out the next block of a file.
769 xtrfile(char *buf
, size_t size
)
774 if (write(ofile
, buf
, (int) size
) == -1)
775 err(1, "write error extracting inode %lu, name %s\nwrite",
776 (unsigned long)curfile
.ino
, curfile
.name
);
780 * Skip over a hole in a file.
784 xtrskip(char *buf
, size_t size
)
787 if (lseek(ofile
, (off_t
)size
, SEEK_CUR
) == -1)
788 err(1, "seek error extracting inode %lu, name %s\nlseek",
789 (unsigned long)curfile
.ino
, curfile
.name
);
793 * Collect the next block of a symbolic link.
796 xtrlnkfile(char *buf
, size_t size
)
800 if (pathlen
> MAXPATHLEN
)
801 errx(1, "symbolic link name: %s->%s%s; too long %d",
802 curfile
.name
, lnkbuf
, buf
, pathlen
);
803 (void) strcat(lnkbuf
, buf
);
807 * Skip over a hole in a symbolic link (should never happen).
811 xtrlnkskip(char *buf
, size_t size
)
814 errx(1, "unallocated block in symbolic link %s", curfile
.name
);
818 * Collect the next block of a bit map.
821 xtrmap(char *buf
, size_t size
)
824 memmove(map
, buf
, size
);
829 * Skip over a hole in a bit map (should never happen).
833 xtrmapskip(char *buf
, size_t size
)
836 panic("hole in map\n");
841 * Noop, when an extraction function is not needed.
845 xtrnull(char *buf
, size_t size
)
852 do_cmpfiles(int fd_tape
, int fd_disk
, long size
)
854 static char buf_tape
[BUFSIZ
];
855 static char buf_disk
[BUFSIZ
];
860 if ((n_tape
= read(fd_tape
, buf_tape
, sizeof(buf_tape
))) < 1) {
861 close(fd_tape
), close(fd_disk
);
862 panic("do_cmpfiles: unexpected EOF[1]");
864 if ((n_disk
= read(fd_disk
, buf_disk
, sizeof(buf_tape
))) < 1) {
865 close(fd_tape
), close(fd_disk
);
866 panic("do_cmpfiles: unexpected EOF[2]");
868 if (n_tape
!= n_disk
) {
869 close(fd_tape
), close(fd_disk
);
870 panic("do_cmpfiles: sizes different!");
872 if (memcmp(buf_tape
, buf_disk
, (size_t)n_tape
) != 0) return (1);
878 /* for debugging compare problems */
879 #undef COMPARE_FAIL_KEEP_FILE
882 #ifdef COMPARE_FAIL_KEEP_FILE
883 /* return true if tapefile should be unlinked after compare */
888 cmpfiles(char *tapefile
, char *diskfile
, struct stat
*sbuf_disk
)
890 struct stat sbuf_tape
;
891 int fd_tape
, fd_disk
;
893 if (stat(tapefile
, &sbuf_tape
) != 0) {
894 panic("Can't lstat tmp file %s: %s\n", tapefile
,
898 if (sbuf_disk
->st_size
!= sbuf_tape
.st_size
) {
900 "%s: size changed from %ld to %ld.\n",
901 diskfile
, (long)sbuf_tape
.st_size
, (long)sbuf_disk
->st_size
);
902 #ifdef COMPARE_FAIL_KEEP_FILE
909 if ((fd_tape
= open(tapefile
, O_RDONLY
)) < 0) {
910 panic("Can't open %s: %s\n", tapefile
, strerror(errno
));
912 if ((fd_disk
= open(diskfile
, O_RDONLY
)) < 0) {
914 panic("Can't open %s: %s\n", diskfile
, strerror(errno
));
917 if (do_cmpfiles(fd_tape
, fd_disk
, sbuf_tape
.st_size
)) {
918 fprintf(stderr
, "%s: tape and disk copies are different\n",
922 #ifdef COMPARE_FAIL_KEEP_FILE
923 /* rename the file to live in /tmp */
924 /* rename `tapefile' to /tmp/<basename of diskfile> */
926 char *p
= strrchr(diskfile
, '/');
927 char newname
[MAXPATHLEN
];
929 panic("can't find / in %s\n", diskfile
);
931 snprintf(newname
, sizeof(newname
), "%s/debug/%s", tmpdir
, p
+ 1);
932 if (rename(tapefile
, newname
)) {
933 panic("rename from %s to %s failed: %s\n",
937 fprintf(stderr
, "*** %s saved to %s\n",
942 /* don't unlink the file (it's not there anymore */
951 #ifdef COMPARE_FAIL_KEEP_FILE
956 static char tmpfilename
[MAXPATHLEN
];
959 comparefile(char *name
)
961 static char *tmpfile
= NULL
;
963 struct stat sb
, stemp
;
966 if ((r
= lstat(name
, &sb
)) != 0) {
967 warn("%s: does not exist (%d)", name
, r
);
973 curfile
.action
= USING
;
974 mode
= curfile
.dip
->di_mode
;
976 Vprintf(stdout
, "comparing %s (size: %ld, mode: 0%o)\n", name
,
977 (long)sb
.st_size
, mode
);
979 if (sb
.st_mode
!= mode
) {
980 fprintf(stderr
, "%s: mode changed from 0%o to 0%o.\n",
981 name
, mode
& 07777, sb
.st_mode
& 07777);
983 switch (mode
& IFMT
) {
997 char lbuf
[MAXPATHLEN
+ 1];
1000 if (!(sb
.st_mode
& S_IFLNK
)) {
1001 fprintf(stderr
, "%s: is no longer a symbolic link\n",
1007 getfile(xtrlnkfile
, xtrlnkskip
);
1010 "%s: zero length symbolic link (ignored)\n",
1014 if ((lsize
= readlink(name
, lbuf
, MAXPATHLEN
)) < 0) {
1015 panic("readlink of %s failed: %s", name
,
1019 if (strcmp(lbuf
, lnkbuf
) != 0) {
1021 "%s: symbolic link changed from %s to %s.\n",
1022 name
, lnkbuf
, lbuf
);
1030 if (!(sb
.st_mode
& (S_IFCHR
|S_IFBLK
))) {
1031 fprintf(stderr
, "%s: no longer a special file\n",
1037 if (sb
.st_rdev
!= (int)curfile
.dip
->di_rdev
) {
1039 "%s: device changed from %d,%d to %d,%d.\n",
1041 ((int)curfile
.dip
->di_rdev
>> 8) & 0xff,
1042 (int)curfile
.dip
->di_rdev
& 0xff,
1043 ((int)sb
.st_rdev
>> 8) & 0xff,
1044 (int)sb
.st_rdev
& 0xff);
1050 if (tmpfile
== NULL
) {
1051 /* argument to mktemp() must not be in RO space: */
1052 snprintf(tmpfilename
, sizeof(tmpfilename
), "%s/restoreCXXXXXX", tmpdir
);
1053 tmpfile
= mktemp(&tmpfilename
[0]);
1055 if ((stat(tmpfile
, &stemp
) == 0) && (unlink(tmpfile
) != 0)) {
1056 panic("cannot delete tmp file %s: %s\n",
1057 tmpfile
, strerror(errno
));
1059 if ((ofile
= creat(tmpfile
, 0600)) < 0) {
1060 panic("cannot create file temp file %s: %s\n",
1061 name
, strerror(errno
));
1063 getfile(xtrfile
, xtrskip
);
1064 (void) close(ofile
);
1065 #ifdef COMPARE_FAIL_KEEP_FILE
1066 if (cmpfiles(tmpfile
, name
, &sb
))
1069 cmpfiles(tmpfile
, name
, &sb
);
1078 * Read TP_BSIZE blocks from the input.
1079 * Handle read errors, and end of media.
1084 ssize_t rd
, newvol
, i
;
1085 int cnt
, seek_failed
;
1087 if (blkcnt
< numtrec
) {
1088 memmove(buf
, &tapebuf
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1093 for (i
= 0; i
< ntrec
; i
++)
1094 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1097 cnt
= ntrec
* TP_BSIZE
;
1102 i
= rmtread(&tapebuf
[rd
], cnt
);
1105 i
= read(mt
, &tapebuf
[rd
], cnt
);
1107 * Check for mid-tape short read error.
1108 * If found, skip rest of buffer and start with the next.
1110 if (!pipein
&& numtrec
< ntrec
&& i
> 0) {
1111 Dprintf(stdout
, "mid-media short read error.\n");
1115 * Handle partial block read.
1117 if (pipein
&& i
== 0 && rd
> 0)
1119 else if (i
> 0 && i
!= ntrec
* TP_BSIZE
) {
1128 * Short read. Process the blocks read.
1130 if (i
% TP_BSIZE
!= 0)
1132 "partial block read: %ld should be %ld\n",
1133 (long)i
, ntrec
* TP_BSIZE
);
1134 numtrec
= i
/ TP_BSIZE
;
1138 * Handle read error.
1141 fprintf(stderr
, "Tape read error while ");
1142 switch (curfile
.action
) {
1144 fprintf(stderr
, "trying to set up tape\n");
1147 fprintf(stderr
, "trying to resynchronize\n");
1150 fprintf(stderr
, "restoring %s\n", curfile
.name
);
1153 fprintf(stderr
, "skipping over inode %lu\n",
1154 (unsigned long)curfile
.ino
);
1157 if (!yflag
&& !reply("continue"))
1159 i
= ntrec
* TP_BSIZE
;
1160 memset(tapebuf
, 0, (size_t)i
);
1163 seek_failed
= (rmtseek(i
, 1) < 0);
1166 seek_failed
= (lseek(mt
, i
, SEEK_CUR
) == (off_t
)-1);
1169 err(1, "continuation failed");
1172 * Handle end of tape.
1175 Vprintf(stdout
, "End-of-tape encountered\n");
1184 if (rd
% TP_BSIZE
!= 0)
1185 panic("partial block read: %d should be %d\n",
1186 rd
, ntrec
* TP_BSIZE
);
1188 memmove(&tapebuf
[rd
], &endoftapemark
, TP_BSIZE
);
1191 memmove(buf
, &tapebuf
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1197 findtapeblksize(void)
1201 for (i
= 0; i
< ntrec
; i
++)
1202 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1206 i
= rmtread(tapebuf
, (size_t)(ntrec
* TP_BSIZE
));
1209 i
= read(mt
, tapebuf
, (size_t)(ntrec
* TP_BSIZE
));
1212 err(1, "tape read error");
1213 if (i
% TP_BSIZE
!= 0)
1214 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
1216 ntrec
= i
/ TP_BSIZE
;
1218 Vprintf(stdout
, "Tape block size is %ld\n", ntrec
);
1236 * Read the next block from the tape.
1237 * Check to see if it is one of several vintage headers.
1238 * If it is an old style header, convert it to a new style header.
1239 * If it is not any valid header, return an error.
1242 gethead(struct s_spcl
*buf
)
1250 char dummy
[TP_BSIZE
];
1257 u_int16_t c_inumber
;
1262 u_int16_t odi_nlink
;
1278 readtape((char *)buf
);
1279 if (buf
->c_magic
!= NFS_MAGIC
) {
1280 if (swabi(buf
->c_magic
) != NFS_MAGIC
)
1283 Vprintf(stdout
, "Note: Doing Byte swapping\n");
1287 if (checksum((int *)buf
) == FAIL
)
1290 swabst((u_char
*)"8i4s31i528bi192b2i", (u_char
*)buf
);
1293 readtape((char *)(&u_ospcl
.s_ospcl
));
1294 memset((char *)buf
, 0, (long)TP_BSIZE
);
1295 buf
->c_type
= u_ospcl
.s_ospcl
.c_type
;
1296 buf
->c_date
= u_ospcl
.s_ospcl
.c_date
;
1297 buf
->c_ddate
= u_ospcl
.s_ospcl
.c_ddate
;
1298 buf
->c_volume
= u_ospcl
.s_ospcl
.c_volume
;
1299 buf
->c_tapea
= u_ospcl
.s_ospcl
.c_tapea
;
1300 buf
->c_inumber
= u_ospcl
.s_ospcl
.c_inumber
;
1301 buf
->c_checksum
= u_ospcl
.s_ospcl
.c_checksum
;
1302 buf
->c_magic
= u_ospcl
.s_ospcl
.c_magic
;
1303 buf
->c_dinode
.di_mode
= u_ospcl
.s_ospcl
.c_dinode
.odi_mode
;
1304 buf
->c_dinode
.di_nlink
= u_ospcl
.s_ospcl
.c_dinode
.odi_nlink
;
1305 buf
->c_dinode
.di_uid
= u_ospcl
.s_ospcl
.c_dinode
.odi_uid
;
1306 buf
->c_dinode
.di_gid
= u_ospcl
.s_ospcl
.c_dinode
.odi_gid
;
1307 buf
->c_dinode
.di_size
= u_ospcl
.s_ospcl
.c_dinode
.odi_size
;
1308 buf
->c_dinode
.di_rdev
= u_ospcl
.s_ospcl
.c_dinode
.odi_rdev
;
1310 buf
->c_dinode
.di_atime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_atime
;
1311 buf
->c_dinode
.di_mtime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_mtime
;
1312 buf
->c_dinode
.di_ctime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_ctime
;
1313 #else /* __linux__ */
1314 buf
->c_dinode
.di_atime
= u_ospcl
.s_ospcl
.c_dinode
.odi_atime
;
1315 buf
->c_dinode
.di_mtime
= u_ospcl
.s_ospcl
.c_dinode
.odi_mtime
;
1316 buf
->c_dinode
.di_ctime
= u_ospcl
.s_ospcl
.c_dinode
.odi_ctime
;
1317 #endif /* __linux__ */
1318 buf
->c_count
= u_ospcl
.s_ospcl
.c_count
;
1319 memmove(buf
->c_addr
, u_ospcl
.s_ospcl
.c_addr
, (long)256);
1320 if (u_ospcl
.s_ospcl
.c_magic
!= OFS_MAGIC
||
1321 checksum((int *)(&u_ospcl
.s_ospcl
)) == FAIL
)
1323 buf
->c_magic
= NFS_MAGIC
;
1326 if ((buf
->c_dinode
.di_size
== 0 || buf
->c_dinode
.di_size
> 0xfffffff) &&
1327 (buf
->c_dinode
.di_mode
& IFMT
) == IFDIR
&& Qcvt
== 0) {
1328 qcvt
.qval
= buf
->c_dinode
.di_size
;
1329 if (qcvt
.val
[0] || qcvt
.val
[1]) {
1330 printf("Note: Doing Quad swapping\n");
1335 qcvt
.qval
= buf
->c_dinode
.di_size
;
1337 qcvt
.val
[1] = qcvt
.val
[0];
1339 buf
->c_dinode
.di_size
= qcvt
.qval
;
1343 switch (buf
->c_type
) {
1348 * Have to patch up missing information in bit map headers
1351 buf
->c_dinode
.di_size
= buf
->c_count
* TP_BSIZE
;
1352 if (buf
->c_count
> TP_NINDIR
)
1355 for (i
= 0; i
< buf
->c_count
; i
++)
1360 if ((buf
->c_flags
& DR_NEWINODEFMT
) == 0)
1372 panic("gethead: unknown inode type %d\n", buf
->c_type
);
1376 * If we are restoring a filesystem with old format inodes,
1377 * copy the uid/gid to the new location.
1380 buf
->c_dinode
.di_uid
= buf
->c_dinode
.di_ouid
;
1381 buf
->c_dinode
.di_gid
= buf
->c_dinode
.di_ogid
;
1389 * Check that a header is where it belongs and predict the next header
1392 accthdr(struct s_spcl
*header
)
1394 static ino_t previno
= 0x7fffffff;
1395 static int prevtype
;
1396 static long predict
;
1399 if (header
->c_type
== TS_TAPE
) {
1400 fprintf(stderr
, "Volume header (%s inode format) ",
1401 oldinofmt
? "old" : "new");
1402 if (header
->c_firstrec
)
1403 fprintf(stderr
, "begins with record %d",
1404 header
->c_firstrec
);
1405 fprintf(stderr
, "\n");
1406 previno
= 0x7fffffff;
1409 if (previno
== 0x7fffffff)
1413 fprintf(stderr
, "Dumped inodes map header");
1416 fprintf(stderr
, "Used inodes map header");
1419 fprintf(stderr
, "File header, ino %lu", (unsigned long)previno
);
1422 fprintf(stderr
, "File continuation header, ino %ld", previno
);
1425 fprintf(stderr
, "End of tape header");
1428 if (predict
!= blksread
- 1)
1429 fprintf(stderr
, "; predicted %ld blocks, got %ld blocks",
1430 predict
, blksread
- 1);
1431 fprintf(stderr
, "\n");
1434 if (header
->c_type
!= TS_END
)
1435 for (i
= 0; i
< header
->c_count
; i
++)
1436 if (readmapflag
|| header
->c_addr
[i
] != 0)
1440 prevtype
= header
->c_type
;
1441 previno
= header
->c_inumber
;
1445 * Find an inode header.
1446 * Complain if had to skip, and complain is set.
1449 findinode(struct s_spcl
*header
)
1451 static long skipcnt
= 0;
1455 curfile
.name
= "<name unknown>";
1456 curfile
.action
= UNKNOWN
;
1460 if (header
->c_magic
!= NFS_MAGIC
) {
1462 while (gethead(header
) == FAIL
||
1463 header
->c_date
!= dumpdate
)
1466 switch (header
->c_type
) {
1470 * Skip up to the beginning of the next record
1472 for (i
= 0; i
< header
->c_count
; i
++)
1473 if (header
->c_addr
[i
])
1475 while (gethead(header
) == FAIL
||
1476 header
->c_date
!= dumpdate
)
1481 curfile
.dip
= &header
->c_dinode
;
1482 curfile
.ino
= header
->c_inumber
;
1486 curfile
.ino
= maxino
;
1490 curfile
.name
= "<file removal list>";
1494 curfile
.name
= "<file dump list>";
1498 panic("unexpected tape header\n");
1502 panic("unknown tape header type %d\n", spcl
.c_type
);
1506 } while (header
->c_type
== TS_ADDR
);
1508 fprintf(stderr
, "resync restore, skipped %ld blocks\n",
1518 j
= sizeof(union u_spcl
) / sizeof(int);
1525 /* What happens if we want to read restore tapes
1526 for a 16bit int machine??? */
1532 if (i
!= CHECKSUM
) {
1533 fprintf(stderr
, "Checksum error %o, inode %lu file %s\n", i
,
1534 (unsigned long)curfile
.ino
, curfile
.name
);
1544 #include <varargs.h>
1549 msg(const char *fmt
, ...)
1562 (void)vfprintf(stderr
, fmt
, ap
);
1565 #endif /* RRESTORE */
1568 swab16(u_char
*sp
, int n
)
1573 c
= sp
[0]; sp
[0] = sp
[1]; sp
[1] = c
;
1580 swab32(u_char
*sp
, int n
)
1585 c
= sp
[0]; sp
[0] = sp
[3]; sp
[3] = c
;
1586 c
= sp
[1]; sp
[1] = sp
[2]; sp
[2] = c
;
1593 swab64(u_char
*sp
, int n
)
1598 c
= sp
[0]; sp
[0] = sp
[7]; sp
[7] = c
;
1599 c
= sp
[1]; sp
[1] = sp
[6]; sp
[6] = c
;
1600 c
= sp
[2]; sp
[2] = sp
[5]; sp
[5] = c
;
1601 c
= sp
[3]; sp
[3] = sp
[4]; sp
[4] = c
;
1608 swabst(u_char
*cp
, u_char
*sp
)
1614 case '0': case '1': case '2': case '3': case '4':
1615 case '5': case '6': case '7': case '8': case '9':
1616 n
= (n
* 10) + (*cp
++ - '0');
1619 case 's': case 'w': case 'h':
1637 default: /* Any other character, like 'b' counts as byte. */
1651 swabst((u_char
*)"i", (u_char
*)&x
);
1658 swabst((u_char
*)"l", (u_char
*)&x
);