]>
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
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
46 * $Id: tape.c,v 1.5 1999/10/11 13:31:13 stelian Exp $
49 #include <sys/param.h>
56 #include <linux/ext2_fs.h>
57 #include <bsdcompat.h>
59 #include <ufs/ufs/dinode.h>
60 #endif /* __linux__ */
61 #include <protocols/dumprestore.h>
64 #include <compaterr.h>
72 #include <ext2fs/ext2fs.h>
77 #include "pathnames.h"
79 static long fssize
= MAXBSIZE
;
81 static int pipein
= 0;
86 static union u_spcl endoftapemark
;
87 static long blksread
; /* blocks read since last header */
88 static long tpblksread
= 0; /* TP_BSIZE blocks read */
89 static long tapesread
;
90 static sigjmp_buf restart
;
91 static int gettingfile
= 0; /* restart has a valid frame */
92 static char *host
= NULL
;
96 static char lnkbuf
[MAXPATHLEN
+ 1];
99 int oldinofmt
; /* old inode format conversion required */
100 int Bcvt
; /* Swap Bytes (for CCI or sun) */
101 static int Qcvt
; /* Swap quads (for sun) */
103 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
105 static void accthdr
__P((struct s_spcl
*));
106 static int checksum
__P((int *));
107 static void findinode
__P((struct s_spcl
*));
108 static void findtapeblksize
__P((void));
109 static int gethead
__P((struct s_spcl
*));
110 static void readtape
__P((char *));
111 static void setdumpnum
__P((void));
112 static u_int swabi
__P((u_int
));
113 static u_long swabl
__P((u_long
));
114 static u_char
*swab64
__P((u_char
*, int));
115 static u_char
*swab32
__P((u_char
*, int));
116 static u_char
*swab16
__P((u_char
*, int));
117 static void terminateinput
__P((void));
118 static void xtrfile
__P((char *, size_t));
119 static void xtrlnkfile
__P((char *, size_t));
120 static void xtrlnkskip
__P((char *, size_t));
121 static void xtrmap
__P((char *, size_t));
122 static void xtrmapskip
__P((char *, size_t));
123 static void xtrskip
__P((char *, size_t));
125 static int readmapflag
;
128 * Set up an input source
131 setinput(char *source
)
137 newtapebuf(NTREC
> HIGHDENSITYTREC
? NTREC
: HIGHDENSITYTREC
);
141 if (strchr(source
, ':')) {
143 source
= strchr(host
, ':');
145 if (rmthost(host
) == 0)
149 if (strcmp(source
, "-") == 0) {
151 * Since input is coming from a pipe we must establish
152 * our own connection to the terminal.
154 terminal
= fopen(_PATH_TTY
, "r");
155 if (terminal
== NULL
) {
156 warn("cannot open %s", _PATH_TTY
);
157 terminal
= fopen(_PATH_DEVNULL
, "r");
158 if (terminal
== NULL
)
159 err(1, "cannot open %s", _PATH_DEVNULL
);
163 setuid(getuid()); /* no longer need or want root privileges */
164 magtape
= strdup(source
);
166 errx(1, "Cannot allocate space for magtape buffer");
170 newtapebuf(long size
)
172 static int tapebufsize
= -1;
175 if (size
<= tapebufsize
)
179 tapebuf
= malloc(size
* TP_BSIZE
);
181 errx(1, "Cannot allocate space for tape buffer");
186 * Verify that the tape drive can be accessed and
187 * that it actually is a dump tape.
195 Vprintf(stdout
, "Verify tape and initialize maps\n");
198 mt
= rmtopen(magtape
, 0);
204 mt
= open(magtape
, O_RDONLY
, 0);
206 err(1, "%s", magtape
);
210 if (!pipein
&& !bflag
)
212 if (gethead(&spcl
) == FAIL
) {
213 blkcnt
--; /* push back this block */
217 if (gethead(&spcl
) == FAIL
)
218 errx(1, "Tape is not a dump tape");
219 fprintf(stderr
, "Converting to new file system format.\n");
222 endoftapemark
.s_spcl
.c_magic
= cvtflag
? OFS_MAGIC
: NFS_MAGIC
;
223 endoftapemark
.s_spcl
.c_type
= TS_END
;
224 ip
= (int *)&endoftapemark
;
225 j
= sizeof(union u_spcl
) / sizeof(int);
230 endoftapemark
.s_spcl
.c_checksum
= CHECKSUM
- i
;
232 if (vflag
|| command
== 't' || command
== 'C')
234 if (filesys
== NULL
) {
235 filesys
= spcl
.c_filesys
;
237 dumptime
= spcl
.c_ddate
;
238 dumpdate
= spcl
.c_date
;
239 if (stat(".", &stbuf
) < 0)
240 err(1, "cannot stat .");
241 if (stbuf
.st_blksize
> 0 && stbuf
.st_blksize
< TP_BSIZE
)
243 if (stbuf
.st_blksize
>= TP_BSIZE
&& stbuf
.st_blksize
<= MAXBSIZE
)
244 fssize
= stbuf
.st_blksize
;
245 if (((fssize
- 1) & fssize
) != 0)
246 errx(1, "bad block size %ld", fssize
);
247 if (spcl
.c_volume
!= 1)
248 errx(1, "Tape is not volume 1 of the dump");
249 if (gethead(&spcl
) == FAIL
) {
250 Dprintf(stdout
, "header read failed at %ld blocks\n", (long)blksread
);
251 panic("no header after volume mark!\n");
254 if (spcl
.c_type
!= TS_CLRI
)
255 errx(1, "Cannot find file removal list");
256 maxino
= (spcl
.c_count
* TP_BSIZE
* NBBY
) + 1;
257 Dprintf(stdout
, "maxino = %ld\n", maxino
);
258 map
= calloc((unsigned)1, (unsigned)howmany(maxino
, NBBY
));
260 panic("no memory for active inode map\n");
262 curfile
.action
= USING
;
263 getfile(xtrmap
, xtrmapskip
);
264 if (spcl
.c_type
!= TS_BITS
)
265 errx(1, "Cannot find file dump list");
266 map
= calloc((unsigned)1, (unsigned)howmany(maxino
, NBBY
));
267 if (map
== (char *)NULL
)
268 panic("no memory for file dump list\n");
270 curfile
.action
= USING
;
271 getfile(xtrmap
, xtrmapskip
);
273 * If there may be whiteout entries on the tape, pretend that the
274 * whiteout inode exists, so that the whiteout entries can be
278 SETINO(WINO
, dumpmap
);
282 * Prompt user to load a new dump volume.
283 * "Nextvol" is the next suggested volume to use.
284 * This suggested volume is enforced when doing full
285 * or incremental restores, but can be overridden by
286 * the user when only extracting a subset of the files.
291 long newvol
= 0, savecnt
= 0, wantnext
= 0, i
;
292 union u_spcl tmpspcl
;
293 # define tmpbuf tmpspcl.s_spcl
302 panic("Changing volumes on pipe input?\n");
310 exit(1); /* pipes do not get a second chance */
311 if (command
== 'R' || command
== 'r' || curfile
.action
!= SKIP
) {
318 while (newvol
<= 0) {
319 if (tapesread
== 0) {
320 fprintf(stderr
, "%s%s%s%s%s",
321 "You have not read any tapes yet.\n",
322 "Unless you know which volume your",
323 " file(s) are on you should start\n",
324 "with the last volume and work",
325 " towards the first.\n");
327 fprintf(stderr
, "You have read volumes");
329 for (i
= 1; i
< 32; i
++)
330 if (tapesread
& (1 << i
)) {
331 fprintf(stderr
, "%s%ld", buf
, (long)i
);
334 fprintf(stderr
, "\n");
337 fprintf(stderr
, "Specify next volume #: ");
338 (void) fflush(stderr
);
339 (void) fgets(buf
, BUFSIZ
, terminal
);
340 } while (!feof(terminal
) && buf
[0] == '\n');
346 "Volume numbers are positive numerics\n");
349 if (newvol
== volno
) {
350 tapesread
|= 1 << volno
;
354 fprintf(stderr
, "Mount tape volume %ld\n", (long)newvol
);
355 fprintf(stderr
, "Enter ``none'' if there are no more tapes\n");
356 fprintf(stderr
, "otherwise enter tape name (default: %s) ", magtape
);
357 (void) fflush(stderr
);
358 (void) fgets(buf
, BUFSIZ
, terminal
);
361 if (!strcmp(buf
, "none\n")) {
365 if (buf
[0] != '\n') {
366 (void) strcpy(magtape
, buf
);
367 magtape
[strlen(magtape
) - 1] = '\0';
371 mt
= rmtopen(magtape
, 0);
374 mt
= open(magtape
, O_RDONLY
, 0);
377 fprintf(stderr
, "Cannot open %s\n", magtape
);
385 if (gethead(&tmpbuf
) == FAIL
) {
386 Dprintf(stdout
, "header read failed at %ld blocks\n", (long)blksread
);
387 fprintf(stderr
, "tape is not dump tape\n");
391 if (tmpbuf
.c_volume
!= volno
) {
392 fprintf(stderr
, "Wrong volume (%d)\n", tmpbuf
.c_volume
);
396 if (tmpbuf
.c_date
!= dumpdate
|| tmpbuf
.c_ddate
!= dumptime
) {
398 fprintf(stderr
, "Wrong dump date\n\tgot: %s",
399 ctime4(&tmpbuf
.c_date
));
400 fprintf(stderr
, "\twanted: %s", ctime4(&dumpdate
));
402 fprintf(stderr
, "Wrong dump date\n\tgot: %s",
403 ctime(&tmpbuf
.c_date
));
404 fprintf(stderr
, "\twanted: %s", ctime(&dumpdate
));
409 tapesread
|= 1 << volno
;
412 * If continuing from the previous volume, skip over any
413 * blocks read already at the end of the previous volume.
415 * If coming to this volume at random, skip to the beginning
416 * of the next record.
418 Dprintf(stdout
, "read %ld recs, tape starts with %ld\n",
419 tpblksread
, (long)tmpbuf
.c_firstrec
);
420 if (tmpbuf
.c_type
== TS_TAPE
&& (tmpbuf
.c_flags
& DR_NEWHEADER
)) {
422 tpblksread
= tmpbuf
.c_firstrec
;
423 for (i
= tmpbuf
.c_count
; i
> 0; i
--)
425 } else if (tmpbuf
.c_firstrec
> 0 &&
426 tmpbuf
.c_firstrec
< tpblksread
- 1) {
428 * -1 since we've read the volume header
430 i
= tpblksread
- tmpbuf
.c_firstrec
- 1;
431 Dprintf(stderr
, "Skipping %ld duplicate record%s.\n",
432 (long)i
, i
> 1 ? "s" : "");
437 if (curfile
.action
== USING
) {
439 panic("active file into volume 1\n");
443 * Skip up to the beginning of the next record
445 if (tmpbuf
.c_type
== TS_TAPE
&& (tmpbuf
.c_flags
& DR_NEWHEADER
))
446 for (i
= tmpbuf
.c_count
; i
> 0; i
--)
448 (void) gethead(&spcl
);
452 siglongjmp(restart
, 1);
457 * Handle unexpected EOF.
463 if (gettingfile
&& curfile
.action
== USING
) {
464 printf("Warning: %s %s\n",
465 "End-of-input encountered while extracting", curfile
.name
);
467 curfile
.name
= "<name unknown>";
468 curfile
.action
= UNKNOWN
;
470 curfile
.ino
= maxino
;
473 siglongjmp(restart
, 1);
478 * handle multiple dumps per tape by skipping forward to the
486 if (dumpnum
== 1 || volno
!= 1)
489 errx(1, "Cannot have multiple dumps on pipe input");
491 tcom
.mt_count
= dumpnum
- 1;
494 rmtioctl(MTFSF
, dumpnum
- 1);
497 if (ioctl(mt
, (int)MTIOCTOP
, (char *)&tcom
) < 0)
505 fprintf(stdout
, "Dump date: %s", ctime4(&spcl
.c_date
));
506 fprintf(stdout
, "Dumped from: %s",
507 (spcl
.c_ddate
== 0) ? "the epoch\n" : ctime4(&spcl
.c_ddate
));
509 fprintf(stdout
, "Dump date: %s", ctime(&spcl
.c_date
));
510 fprintf(stdout
, "Dumped from: %s",
511 (spcl
.c_ddate
== 0) ? "the epoch\n" : ctime(&spcl
.c_ddate
));
513 if (spcl
.c_host
[0] == '\0')
515 fprintf(stderr
, "Level %d dump of %s on %s:%s\n",
516 spcl
.c_level
, spcl
.c_filesys
, spcl
.c_host
, spcl
.c_dev
);
517 fprintf(stderr
, "Label: %s\n", spcl
.c_label
);
521 extractfile(char *name
)
525 struct timeval timep
[2];
529 curfile
.action
= USING
;
531 timep
[0].tv_sec
= curfile
.dip
->di_atime
.tv_sec
;
532 timep
[0].tv_usec
= curfile
.dip
->di_atime
.tv_usec
;
533 timep
[1].tv_sec
= curfile
.dip
->di_mtime
.tv_sec
;
534 timep
[1].tv_usec
= curfile
.dip
->di_mtime
.tv_usec
;
535 #else /* __linux__ */
536 timep
[0].tv_sec
= curfile
.dip
->di_atime
;
537 timep
[0].tv_usec
= curfile
.dip
->di_atimensec
/ 1000;
538 timep
[1].tv_sec
= curfile
.dip
->di_mtime
;
539 timep
[1].tv_usec
= curfile
.dip
->di_mtimensec
/ 1000;
540 #endif /* __linux__ */
541 mode
= curfile
.dip
->di_mode
;
542 flags
= curfile
.dip
->di_flags
;
543 switch (mode
& IFMT
) {
546 fprintf(stderr
, "%s: unknown file mode 0%o\n", name
, mode
);
551 Vprintf(stdout
, "skipped socket %s\n", name
);
557 ep
= lookupname(name
);
558 if (ep
== NULL
|| ep
->e_flags
& EXTRACT
)
559 panic("unextracted directory %s\n", name
);
563 Vprintf(stdout
, "extract file %s\n", name
);
564 return (genliteraldir(name
, curfile
.ino
));
567 { uid_t luid
= curfile
.dip
->di_uid
;
568 gid_t lgid
= curfile
.dip
->di_gid
;
572 getfile(xtrlnkfile
, xtrlnkskip
);
575 "%s: zero length symbolic link (ignored)\n", name
);
578 if (linkit(lnkbuf
, name
, SYMLINK
) == FAIL
)
580 (void) chown(name
, luid
, lgid
);
585 Vprintf(stdout
, "extract fifo %s\n", name
);
592 if (mkfifo(name
, mode
) < 0) {
593 warn("%s: cannot create fifo", name
);
597 (void) chown(name
, curfile
.dip
->di_uid
, curfile
.dip
->di_gid
);
598 (void) chmod(name
, mode
);
601 (void) fsetflags(name
, flags
);
603 (void) chflags(name
, flags
);
611 Vprintf(stdout
, "extract special file %s\n", name
);
618 if (mknod(name
, mode
, (int)curfile
.dip
->di_rdev
) < 0) {
619 warn("%s: cannot create special file", name
);
623 (void) chown(name
, curfile
.dip
->di_uid
, curfile
.dip
->di_gid
);
624 (void) chmod(name
, mode
);
628 warn("%s: fsetflags called on a special file", name
);
629 (void) fsetflags(name
, flags
);
632 (void) chflags(name
, flags
);
639 Vprintf(stdout
, "extract file %s\n", name
);
646 if ((ofile
= open(name
, O_WRONLY
| O_CREAT
| O_TRUNC
,
648 warn("%s: cannot create file", name
);
652 (void) fchown(ofile
, curfile
.dip
->di_uid
, curfile
.dip
->di_gid
);
653 (void) fchmod(ofile
, mode
);
656 (void) setflags(ofile
, flags
);
658 (void) fchflags(ofile
, flags
);
660 getfile(xtrfile
, xtrskip
);
669 * skip over bit maps on the tape
675 while (spcl
.c_type
== TS_BITS
|| spcl
.c_type
== TS_CLRI
)
680 * skip over a file on the tape
686 curfile
.action
= SKIP
;
687 getfile(xtrnull
, xtrnull
);
691 * Extract a file from the tape.
692 * When an allocated block is found it is passed to the fill function;
693 * when an unallocated block (hole) is found, a zeroed buffer is passed
694 * to the skip function.
697 getfile(void (*fill
) __P((char *, size_t)), void (*skip
) __P((char *, size_t)))
700 volatile int curblk
= 0;
701 volatile quad_t size
= spcl
.c_dinode
.di_size
;
702 volatile int last_write_was_hole
= 0;
703 quad_t origsize
= size
;
704 static char clearedbuf
[MAXBSIZE
];
705 char buf
[MAXBSIZE
/ TP_BSIZE
][TP_BSIZE
];
708 if (spcl
.c_type
== TS_END
)
709 panic("ran off end of tape\n");
710 if (spcl
.c_magic
!= NFS_MAGIC
)
711 panic("not at beginning of a file\n");
712 if (!gettingfile
&& setjmp(restart
) != 0)
716 for (i
= 0; i
< spcl
.c_count
; i
++) {
717 if (readmapflag
|| spcl
.c_addr
[i
]) {
718 readtape(&buf
[curblk
++][0]);
719 if (curblk
== fssize
/ TP_BSIZE
) {
720 (*fill
)((char *)buf
, (size_t)(size
> TP_BSIZE
?
721 fssize
: (curblk
- 1) * TP_BSIZE
+ size
));
723 last_write_was_hole
= 0;
727 (*fill
)((char *)buf
, (size_t)(size
> TP_BSIZE
?
729 (curblk
- 1) * TP_BSIZE
+ size
));
732 (*skip
)(clearedbuf
, (long)(size
> TP_BSIZE
?
734 last_write_was_hole
= 1;
736 if ((size
-= TP_BSIZE
) <= 0) {
737 for (i
++; i
< spcl
.c_count
; i
++)
738 if (readmapflag
|| spcl
.c_addr
[i
])
743 if (gethead(&spcl
) == GOOD
&& size
> 0) {
744 if (spcl
.c_type
== TS_ADDR
)
747 "Missing address (header) block for %s at %ld blocks\n",
748 curfile
.name
, (long)blksread
);
751 (*fill
)((char *)buf
, (size_t)(curblk
* TP_BSIZE
) + size
);
752 last_write_was_hole
= 0;
754 if (last_write_was_hole
) {
755 ftruncate(ofile
, origsize
);
762 * Write out the next block of a file.
765 xtrfile(char *buf
, size_t size
)
770 if (write(ofile
, buf
, (int) size
) == -1)
771 err(1, "write error extracting inode %lu, name %s\nwrite",
772 (unsigned long)curfile
.ino
, curfile
.name
);
776 * Skip over a hole in a file.
780 xtrskip(char *buf
, size_t size
)
783 if (lseek(ofile
, (off_t
)size
, SEEK_CUR
) == -1)
784 err(1, "seek error extracting inode %lu, name %s\nlseek",
785 (unsigned long)curfile
.ino
, curfile
.name
);
789 * Collect the next block of a symbolic link.
792 xtrlnkfile(char *buf
, size_t size
)
796 if (pathlen
> MAXPATHLEN
)
797 errx(1, "symbolic link name: %s->%s%s; too long %d",
798 curfile
.name
, lnkbuf
, buf
, pathlen
);
799 (void) strcat(lnkbuf
, buf
);
803 * Skip over a hole in a symbolic link (should never happen).
807 xtrlnkskip(char *buf
, size_t size
)
810 errx(1, "unallocated block in symbolic link %s", curfile
.name
);
814 * Collect the next block of a bit map.
817 xtrmap(char *buf
, size_t size
)
820 memmove(map
, buf
, size
);
825 * Skip over a hole in a bit map (should never happen).
829 xtrmapskip(char *buf
, size_t size
)
832 panic("hole in map\n");
837 * Noop, when an extraction function is not needed.
841 xtrnull(char *buf
, size_t size
)
848 do_cmpfiles(int fd_tape
, int fd_disk
, long size
)
850 static char buf_tape
[BUFSIZ
];
851 static char buf_disk
[BUFSIZ
];
856 if ((n_tape
= read(fd_tape
, buf_tape
, sizeof(buf_tape
))) < 1) {
857 close(fd_tape
), close(fd_disk
);
858 panic("do_cmpfiles: unexpected EOF[1]");
860 if ((n_disk
= read(fd_disk
, buf_disk
, sizeof(buf_tape
))) < 1) {
861 close(fd_tape
), close(fd_disk
);
862 panic("do_cmpfiles: unexpected EOF[2]");
864 if (n_tape
!= n_disk
) {
865 close(fd_tape
), close(fd_disk
);
866 panic("do_cmpfiles: sizes different!");
868 if (memcmp(buf_tape
, buf_disk
, (size_t)n_tape
) != 0) return (1);
874 /* for debugging compare problems */
875 #undef COMPARE_FAIL_KEEP_FILE
878 #ifdef COMPARE_FAIL_KEEP_FILE
879 /* return true if tapefile should be unlinked after compare */
884 cmpfiles(char *tapefile
, char *diskfile
, struct stat
*sbuf_disk
)
886 struct stat sbuf_tape
;
887 int fd_tape
, fd_disk
;
889 if (stat(tapefile
, &sbuf_tape
) != 0) {
890 panic("Can't lstat tmp file %s: %s\n", tapefile
,
894 if (sbuf_disk
->st_size
!= sbuf_tape
.st_size
) {
896 "%s: size changed from %ld to %ld.\n",
897 diskfile
, (long)sbuf_tape
.st_size
, (long)sbuf_disk
->st_size
);
898 #ifdef COMPARE_FAIL_KEEP_FILE
905 if ((fd_tape
= open(tapefile
, O_RDONLY
)) < 0) {
906 panic("Can't open %s: %s\n", tapefile
, strerror(errno
));
908 if ((fd_disk
= open(diskfile
, O_RDONLY
)) < 0) {
910 panic("Can't open %s: %s\n", diskfile
, strerror(errno
));
913 if (do_cmpfiles(fd_tape
, fd_disk
, sbuf_tape
.st_size
)) {
914 fprintf(stderr
, "%s: tape and disk copies are different\n",
918 #ifdef COMPARE_FAIL_KEEP_FILE
919 /* rename the file to live in /tmp */
920 /* rename `tapefile' to /tmp/<basename of diskfile> */
922 char *p
= strrchr(diskfile
, '/');
923 char newname
[MAXPATHLEN
];
925 panic("can't find / in %s\n", diskfile
);
927 snprintf(newname
, sizeof(newname
), "%s/debug/%s", tmpdir
, p
+ 1);
928 if (rename(tapefile
, newname
)) {
929 panic("rename from %s to %s failed: %s\n",
933 fprintf(stderr
, "*** %s saved to %s\n",
938 /* don't unlink the file (it's not there anymore */
947 #ifdef COMPARE_FAIL_KEEP_FILE
952 static char tmpfilename
[MAXPATHLEN
];
955 comparefile(char *name
)
957 static char *tmpfile
= NULL
;
959 struct stat sb
, stemp
;
962 if ((r
= lstat(name
, &sb
)) != 0) {
963 warn("%s: does not exist (%d)", name
, r
);
969 curfile
.action
= USING
;
970 mode
= curfile
.dip
->di_mode
;
972 Vprintf(stdout
, "comparing %s (size: %ld, mode: 0%o)\n", name
,
973 (long)sb
.st_size
, mode
);
975 if (sb
.st_mode
!= mode
) {
976 fprintf(stderr
, "%s: mode changed from 0%o to 0%o.\n",
977 name
, mode
& 07777, sb
.st_mode
& 07777);
979 switch (mode
& IFMT
) {
993 char lbuf
[MAXPATHLEN
+ 1];
996 if (!(sb
.st_mode
& S_IFLNK
)) {
997 fprintf(stderr
, "%s: is no longer a symbolic link\n",
1003 getfile(xtrlnkfile
, xtrlnkskip
);
1006 "%s: zero length symbolic link (ignored)\n",
1010 if ((lsize
= readlink(name
, lbuf
, MAXPATHLEN
)) < 0) {
1011 panic("readlink of %s failed: %s", name
,
1015 if (strcmp(lbuf
, lnkbuf
) != 0) {
1017 "%s: symbolic link changed from %s to %s.\n",
1018 name
, lnkbuf
, lbuf
);
1026 if (!(sb
.st_mode
& (S_IFCHR
|S_IFBLK
))) {
1027 fprintf(stderr
, "%s: no longer a special file\n",
1033 if (sb
.st_rdev
!= (int)curfile
.dip
->di_rdev
) {
1035 "%s: device changed from %d,%d to %d,%d.\n",
1037 ((int)curfile
.dip
->di_rdev
>> 8) & 0xff,
1038 (int)curfile
.dip
->di_rdev
& 0xff,
1039 ((int)sb
.st_rdev
>> 8) & 0xff,
1040 (int)sb
.st_rdev
& 0xff);
1046 if (tmpfile
== NULL
) {
1047 /* argument to mktemp() must not be in RO space: */
1048 snprintf(tmpfilename
, sizeof(tmpfilename
), "%s/restoreCXXXXXX", tmpdir
);
1049 tmpfile
= mktemp(&tmpfilename
[0]);
1051 if ((stat(tmpfile
, &stemp
) == 0) && (unlink(tmpfile
) != 0)) {
1052 panic("cannot delete tmp file %s: %s\n",
1053 tmpfile
, strerror(errno
));
1055 if ((ofile
= creat(tmpfile
, 0600)) < 0) {
1056 panic("cannot create file temp file %s: %s\n",
1057 name
, strerror(errno
));
1059 getfile(xtrfile
, xtrskip
);
1060 (void) close(ofile
);
1061 #ifdef COMPARE_FAIL_KEEP_FILE
1062 if (cmpfiles(tmpfile
, name
, &sb
))
1065 cmpfiles(tmpfile
, name
, &sb
);
1074 * Read TP_BSIZE blocks from the input.
1075 * Handle read errors, and end of media.
1080 ssize_t rd
, newvol
, i
;
1081 int cnt
, seek_failed
;
1083 if (blkcnt
< numtrec
) {
1084 memmove(buf
, &tapebuf
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1089 for (i
= 0; i
< ntrec
; i
++)
1090 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1093 cnt
= ntrec
* TP_BSIZE
;
1098 i
= rmtread(&tapebuf
[rd
], cnt
);
1101 i
= read(mt
, &tapebuf
[rd
], cnt
);
1103 * Check for mid-tape short read error.
1104 * If found, skip rest of buffer and start with the next.
1106 if (!pipein
&& numtrec
< ntrec
&& i
> 0) {
1107 Dprintf(stdout
, "mid-media short read error.\n");
1111 * Handle partial block read.
1113 if (pipein
&& i
== 0 && rd
> 0)
1115 else if (i
> 0 && i
!= ntrec
* TP_BSIZE
) {
1124 * Short read. Process the blocks read.
1126 if (i
% TP_BSIZE
!= 0)
1128 "partial block read: %ld should be %ld\n",
1129 (long)i
, ntrec
* TP_BSIZE
);
1130 numtrec
= i
/ TP_BSIZE
;
1134 * Handle read error.
1137 fprintf(stderr
, "Tape read error while ");
1138 switch (curfile
.action
) {
1140 fprintf(stderr
, "trying to set up tape\n");
1143 fprintf(stderr
, "trying to resynchronize\n");
1146 fprintf(stderr
, "restoring %s\n", curfile
.name
);
1149 fprintf(stderr
, "skipping over inode %lu\n",
1150 (unsigned long)curfile
.ino
);
1153 if (!yflag
&& !reply("continue"))
1155 i
= ntrec
* TP_BSIZE
;
1156 memset(tapebuf
, 0, (size_t)i
);
1159 seek_failed
= (rmtseek(i
, 1) < 0);
1162 seek_failed
= (lseek(mt
, i
, SEEK_CUR
) == (off_t
)-1);
1165 err(1, "continuation failed");
1168 * Handle end of tape.
1171 Vprintf(stdout
, "End-of-tape encountered\n");
1180 if (rd
% TP_BSIZE
!= 0)
1181 panic("partial block read: %d should be %d\n",
1182 rd
, ntrec
* TP_BSIZE
);
1184 memmove(&tapebuf
[rd
], &endoftapemark
, TP_BSIZE
);
1187 memmove(buf
, &tapebuf
[(blkcnt
++ * TP_BSIZE
)], TP_BSIZE
);
1193 findtapeblksize(void)
1197 for (i
= 0; i
< ntrec
; i
++)
1198 ((struct s_spcl
*)&tapebuf
[i
* TP_BSIZE
])->c_magic
= 0;
1202 i
= rmtread(tapebuf
, (size_t)(ntrec
* TP_BSIZE
));
1205 i
= read(mt
, tapebuf
, (size_t)(ntrec
* TP_BSIZE
));
1208 err(1, "tape read error");
1209 if (i
% TP_BSIZE
!= 0)
1210 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
1212 ntrec
= i
/ TP_BSIZE
;
1214 Vprintf(stdout
, "Tape block size is %ld\n", ntrec
);
1232 * Read the next block from the tape.
1233 * Check to see if it is one of several vintage headers.
1234 * If it is an old style header, convert it to a new style header.
1235 * If it is not any valid header, return an error.
1238 gethead(struct s_spcl
*buf
)
1246 char dummy
[TP_BSIZE
];
1253 u_int16_t c_inumber
;
1258 u_int16_t odi_nlink
;
1274 readtape((char *)buf
);
1275 if (buf
->c_magic
!= NFS_MAGIC
) {
1276 if (swabi(buf
->c_magic
) != NFS_MAGIC
)
1279 Vprintf(stdout
, "Note: Doing Byte swapping\n");
1283 if (checksum((int *)buf
) == FAIL
)
1286 swabst((u_char
*)"8i4s31i528bi192b2i", (u_char
*)buf
);
1289 readtape((char *)(&u_ospcl
.s_ospcl
));
1290 memset((char *)buf
, 0, (long)TP_BSIZE
);
1291 buf
->c_type
= u_ospcl
.s_ospcl
.c_type
;
1292 buf
->c_date
= u_ospcl
.s_ospcl
.c_date
;
1293 buf
->c_ddate
= u_ospcl
.s_ospcl
.c_ddate
;
1294 buf
->c_volume
= u_ospcl
.s_ospcl
.c_volume
;
1295 buf
->c_tapea
= u_ospcl
.s_ospcl
.c_tapea
;
1296 buf
->c_inumber
= u_ospcl
.s_ospcl
.c_inumber
;
1297 buf
->c_checksum
= u_ospcl
.s_ospcl
.c_checksum
;
1298 buf
->c_magic
= u_ospcl
.s_ospcl
.c_magic
;
1299 buf
->c_dinode
.di_mode
= u_ospcl
.s_ospcl
.c_dinode
.odi_mode
;
1300 buf
->c_dinode
.di_nlink
= u_ospcl
.s_ospcl
.c_dinode
.odi_nlink
;
1301 buf
->c_dinode
.di_uid
= u_ospcl
.s_ospcl
.c_dinode
.odi_uid
;
1302 buf
->c_dinode
.di_gid
= u_ospcl
.s_ospcl
.c_dinode
.odi_gid
;
1303 buf
->c_dinode
.di_size
= u_ospcl
.s_ospcl
.c_dinode
.odi_size
;
1304 buf
->c_dinode
.di_rdev
= u_ospcl
.s_ospcl
.c_dinode
.odi_rdev
;
1306 buf
->c_dinode
.di_atime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_atime
;
1307 buf
->c_dinode
.di_mtime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_mtime
;
1308 buf
->c_dinode
.di_ctime
.tv_sec
= u_ospcl
.s_ospcl
.c_dinode
.odi_ctime
;
1309 #else /* __linux__ */
1310 buf
->c_dinode
.di_atime
= u_ospcl
.s_ospcl
.c_dinode
.odi_atime
;
1311 buf
->c_dinode
.di_mtime
= u_ospcl
.s_ospcl
.c_dinode
.odi_mtime
;
1312 buf
->c_dinode
.di_ctime
= u_ospcl
.s_ospcl
.c_dinode
.odi_ctime
;
1313 #endif /* __linux__ */
1314 buf
->c_count
= u_ospcl
.s_ospcl
.c_count
;
1315 memmove(buf
->c_addr
, u_ospcl
.s_ospcl
.c_addr
, (long)256);
1316 if (u_ospcl
.s_ospcl
.c_magic
!= OFS_MAGIC
||
1317 checksum((int *)(&u_ospcl
.s_ospcl
)) == FAIL
)
1319 buf
->c_magic
= NFS_MAGIC
;
1322 if ((buf
->c_dinode
.di_size
== 0 || buf
->c_dinode
.di_size
> 0xfffffff) &&
1323 (buf
->c_dinode
.di_mode
& IFMT
) == IFDIR
&& Qcvt
== 0) {
1324 qcvt
.qval
= buf
->c_dinode
.di_size
;
1325 if (qcvt
.val
[0] || qcvt
.val
[1]) {
1326 printf("Note: Doing Quad swapping\n");
1331 qcvt
.qval
= buf
->c_dinode
.di_size
;
1333 qcvt
.val
[1] = qcvt
.val
[0];
1335 buf
->c_dinode
.di_size
= qcvt
.qval
;
1339 switch (buf
->c_type
) {
1344 * Have to patch up missing information in bit map headers
1347 buf
->c_dinode
.di_size
= buf
->c_count
* TP_BSIZE
;
1348 if (buf
->c_count
> TP_NINDIR
)
1351 for (i
= 0; i
< buf
->c_count
; i
++)
1356 if ((buf
->c_flags
& DR_NEWINODEFMT
) == 0)
1368 panic("gethead: unknown inode type %d\n", buf
->c_type
);
1372 * If we are restoring a filesystem with old format inodes,
1373 * copy the uid/gid to the new location.
1376 buf
->c_dinode
.di_uid
= buf
->c_dinode
.di_ouid
;
1377 buf
->c_dinode
.di_gid
= buf
->c_dinode
.di_ogid
;
1385 * Check that a header is where it belongs and predict the next header
1388 accthdr(struct s_spcl
*header
)
1390 static ino_t previno
= 0x7fffffff;
1391 static int prevtype
;
1392 static long predict
;
1395 if (header
->c_type
== TS_TAPE
) {
1396 fprintf(stderr
, "Volume header (%s inode format) ",
1397 oldinofmt
? "old" : "new");
1398 if (header
->c_firstrec
)
1399 fprintf(stderr
, "begins with record %d",
1400 header
->c_firstrec
);
1401 fprintf(stderr
, "\n");
1402 previno
= 0x7fffffff;
1405 if (previno
== 0x7fffffff)
1409 fprintf(stderr
, "Dumped inodes map header");
1412 fprintf(stderr
, "Used inodes map header");
1415 fprintf(stderr
, "File header, ino %lu", (unsigned long)previno
);
1418 fprintf(stderr
, "File continuation header, ino %ld", previno
);
1421 fprintf(stderr
, "End of tape header");
1424 if (predict
!= blksread
- 1)
1425 fprintf(stderr
, "; predicted %ld blocks, got %ld blocks",
1426 predict
, blksread
- 1);
1427 fprintf(stderr
, "\n");
1430 if (header
->c_type
!= TS_END
)
1431 for (i
= 0; i
< header
->c_count
; i
++)
1432 if (readmapflag
|| header
->c_addr
[i
] != 0)
1436 prevtype
= header
->c_type
;
1437 previno
= header
->c_inumber
;
1441 * Find an inode header.
1442 * Complain if had to skip, and complain is set.
1445 findinode(struct s_spcl
*header
)
1447 static long skipcnt
= 0;
1451 curfile
.name
= "<name unknown>";
1452 curfile
.action
= UNKNOWN
;
1456 if (header
->c_magic
!= NFS_MAGIC
) {
1458 while (gethead(header
) == FAIL
||
1459 header
->c_date
!= dumpdate
)
1462 switch (header
->c_type
) {
1466 * Skip up to the beginning of the next record
1468 for (i
= 0; i
< header
->c_count
; i
++)
1469 if (header
->c_addr
[i
])
1471 while (gethead(header
) == FAIL
||
1472 header
->c_date
!= dumpdate
)
1477 curfile
.dip
= &header
->c_dinode
;
1478 curfile
.ino
= header
->c_inumber
;
1482 curfile
.ino
= maxino
;
1486 curfile
.name
= "<file removal list>";
1490 curfile
.name
= "<file dump list>";
1494 panic("unexpected tape header\n");
1498 panic("unknown tape header type %d\n", spcl
.c_type
);
1502 } while (header
->c_type
== TS_ADDR
);
1504 fprintf(stderr
, "resync restore, skipped %ld blocks\n",
1514 j
= sizeof(union u_spcl
) / sizeof(int);
1521 /* What happens if we want to read restore tapes
1522 for a 16bit int machine??? */
1528 if (i
!= CHECKSUM
) {
1529 fprintf(stderr
, "Checksum error %o, inode %lu file %s\n", i
,
1530 (unsigned long)curfile
.ino
, curfile
.name
);
1540 #include <varargs.h>
1545 msg(const char *fmt
, ...)
1558 (void)vfprintf(stderr
, fmt
, ap
);
1561 #endif /* RRESTORE */
1564 swab16(u_char
*sp
, int n
)
1569 c
= sp
[0]; sp
[0] = sp
[1]; sp
[1] = c
;
1576 swab32(u_char
*sp
, int n
)
1581 c
= sp
[0]; sp
[0] = sp
[3]; sp
[3] = c
;
1582 c
= sp
[1]; sp
[1] = sp
[2]; sp
[2] = c
;
1589 swab64(u_char
*sp
, int n
)
1594 c
= sp
[0]; sp
[0] = sp
[7]; sp
[7] = c
;
1595 c
= sp
[1]; sp
[1] = sp
[6]; sp
[6] = c
;
1596 c
= sp
[2]; sp
[2] = sp
[5]; sp
[5] = c
;
1597 c
= sp
[3]; sp
[3] = sp
[4]; sp
[4] = c
;
1604 swabst(u_char
*cp
, u_char
*sp
)
1610 case '0': case '1': case '2': case '3': case '4':
1611 case '5': case '6': case '7': case '8': case '9':
1612 n
= (n
* 10) + (*cp
++ - '0');
1615 case 's': case 'w': case 'h':
1633 default: /* Any other character, like 'b' counts as byte. */
1647 swabst((u_char
*)"i", (u_char
*)&x
);
1654 swabst((u_char
*)"l", (u_char
*)&x
);