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. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44 static const char rcsid[] =
45 "$Id: tape.c,v 1.74 2003/03/31 09:42:59 stelian Exp $";
49 #include <compatlfs.h>
51 #include <compaterr.h>
59 #include <sys/param.h>
67 #ifdef HAVE_EXT2FS_EXT2_FS_H
68 #include <ext2fs/ext2_fs.h>
70 #include <linux/ext2_fs.h>
72 #include <ext2fs/ext2fs.h>
73 #include <bsdcompat.h>
75 #include <ufs/ufs/dinode.h>
76 #endif /* __linux__ */
77 #include <protocols/dumprestore.h>
81 #endif /* HAVE_ZLIB */
85 #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) || defined(HAVE_LZO)
110 static char *comprbuf; /* uncompress work buf */
111 static size_t comprlen; /* size including prefix */
113 static union u_spcl endoftapemark;
114 static long blksread; /* blocks read since last header */
115 static long tpblksread = 0; /* TP_BSIZE blocks read */
116 static long tapesread;
117 static sigjmp_buf restart;
118 static int gettingfile = 0; /* restart has a valid frame */
123 static char lnkbuf[MAXPATHLEN + 1];
126 int oldinofmt; /* old inode format conversion required */
127 int Bcvt; /* Swap Bytes (for CCI or sun) */
128 static int Qcvt; /* Swap quads (for sun) */
130 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
132 static void accthdr __P((struct s_spcl *));
133 static int checksum __P((int *));
134 static void findinode __P((struct s_spcl *));
135 static void findtapeblksize __P((void));
136 static int gethead __P((struct s_spcl *));
137 static int converthead __P((struct s_spcl *));
138 static void converttapebuf __P((struct tapebuf *));
139 static void readtape __P((char *));
140 static void setdumpnum __P((void));
141 static u_int swabi __P((u_int));
143 static u_long swabl __P((u_long));
145 static u_char *swab64 __P((u_char *, int));
146 static u_char *swab32 __P((u_char *, int));
147 static u_char *swab16 __P((u_char *, int));
148 static void terminateinput __P((void));
149 static void xtrfile __P((char *, size_t));
150 static void xtrlnkfile __P((char *, size_t));
151 static void xtrlnkskip __P((char *, size_t));
152 static void xtrmap __P((char *, size_t));
153 static void xtrmapskip __P((char *, size_t));
154 static void xtrskip __P((char *, size_t));
155 static void setmagtapein __P((void));
157 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
158 static void newcomprbuf __P((int));
159 static void (*readtape_func) __P((char *));
160 static void readtape_set __P((char *));
161 static void readtape_uncompr __P((char *));
162 static void readtape_comprfile __P((char *));
163 static void readtape_comprtape __P((char *));
164 static char *decompress_tapebuf __P((struct tapebuf *, int));
165 static void msg_read_error __P((char *));
167 static int read_a_block __P((int, char *, size_t, long *));
168 #define PREFIXSIZE sizeof(struct tapebuf)
170 #define COMPARE_ONTHEFLY 1
173 static int ifile; /* input file for compare */
174 static int cmperror; /* compare error */
175 static void xtrcmpfile __P((char *, size_t));
176 static void xtrcmpskip __P((char *, size_t));
179 static int readmapflag;
180 static int readingmaps; /* set to 1 while reading the maps */
183 * Set up an input source. This is called from main.c before setup() is.
186 setinput(char *source)
192 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
196 if (strchr(source, ':')) {
198 source = strchr(host, ':');
200 if (rmthost(host) == 0)
204 if (strcmp(source, "-") == 0) {
206 * Since input is coming from a pipe we must establish
207 * our own connection to the terminal.
209 terminal = fopen(_PATH_TTY, "r");
210 if (terminal == NULL) {
211 warn("cannot open %s", _PATH_TTY);
212 terminal = fopen(_PATH_DEVNULL, "r");
213 if (terminal == NULL)
214 err(1, "cannot open %s", _PATH_DEVNULL);
218 setuid(getuid()); /* no longer need or want root privileges */
220 strncpy(magtapeprefix, source, MAXPATHLEN);
221 magtapeprefix[MAXPATHLEN-1] = '\0';
222 snprintf(magtape, MAXPATHLEN, "%s%03d", source, 1);
225 strncpy(magtape, source, MAXPATHLEN);
226 magtape[MAXPATHLEN - 1] = '\0';
230 newtapebuf(long size)
232 static int tapebufsize = -1;
235 bufsize = ntrec * TP_BSIZE;
236 if (size <= tapebufsize)
240 tapebuf = malloc(size * TP_BSIZE + sizeof(struct tapebuf));
242 errx(1, "Cannot allocate space for tape buffer");
246 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
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 || HAVE_LZO */
263 * Verify that the tape drive can be accessed and
264 * that it actually is a dump tape.
269 int i, j, *ip, bot_code;
273 Vprintf(stdout, "Verify tape and initialize maps\n");
274 if (Afile == NULL && bot_script) {
275 msg("Launching %s\n", bot_script);
276 bot_code = system_command(bot_script, magtape, 1);
277 if (bot_code != 0 && bot_code != 1) {
278 msg("Restore aborted by the beginning of tape script\n");
290 mt = rmtopen(temptape, O_RDONLY);
296 mt = OPEN(temptape, O_RDONLY, 0);
298 err(1, "%s", temptape);
304 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
305 readtape_func = readtape_set;
306 #if defined(HAVE_LZO)
307 if (lzo_init() != LZO_E_OK) {
308 msg("internal error - lzo_init failed \n");
315 if (gethead(&spcl) == FAIL) {
316 blkcnt--; /* push back this block */
320 if (gethead(&spcl) == FAIL)
321 errx(1, "Tape is not a dump tape");
322 fprintf(stderr, "Converting to new file system format.\n");
326 fprintf(stderr, "Dump tape is compressed.\n");
327 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB) && !defined(HAVE_LZO)
328 errx(1,"This restore version doesn't support decompression");
329 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
332 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC;
333 endoftapemark.s_spcl.c_type = TS_END;
334 ip = (int *)&endoftapemark;
335 j = sizeof(union u_spcl) / sizeof(int);
340 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
342 if (vflag || command == 't' || command == 'C')
345 if (tapeposflag && (unsigned long)spcl.c_date != qfadumpdate)
346 errx(1, "different QFA/dumpdates detected\n");
348 if (filesys[0] == '\0') {
350 strncpy(filesys, spcl.c_filesys, NAMELEN);
351 filesys[NAMELEN - 1] = '\0';
352 dirptr = strstr(filesys, " (dir");
356 dumptime = spcl.c_ddate;
357 dumpdate = spcl.c_date;
358 if (STAT(".", &stbuf) < 0)
359 err(1, "cannot stat .");
360 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
362 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
363 fssize = stbuf.st_blksize;
364 if (((fssize - 1) & fssize) != 0)
365 errx(1, "bad block size %ld", fssize);
366 if (spcl.c_volume != 1)
367 errx(1, "Tape is not volume 1 of the dump");
368 if (gethead(&spcl) == FAIL) {
369 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
370 panic("no header after volume mark!\n");
374 if (spcl.c_type != TS_CLRI)
375 errx(1, "Cannot find file removal list");
376 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
377 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
379 errx(1, "no memory for active inode map");
381 curfile.action = USING;
382 getfile(xtrmap, xtrmapskip);
383 while (spcl.c_type == TS_ADDR) {
384 /* Recompute maxino and the map */
385 dump_ino_t oldmaxino = maxino;
386 maxino += (spcl.c_count * TP_BSIZE * NBBY) + 1;
387 resizemaps(oldmaxino, maxino);
389 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
390 getfile(xtrmap, xtrmapskip);
392 Dprintf(stdout, "maxino = %lu\n", (unsigned long)maxino);
393 if (spcl.c_type != TS_BITS)
394 errx(1, "Cannot find file dump list");
395 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
396 if (map == (char *)NULL)
397 errx(1, "no memory for file dump list");
399 curfile.action = USING;
400 getfile(xtrmap, xtrmapskip);
401 while (spcl.c_type == TS_ADDR) {
402 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
403 getfile(xtrmap, xtrmapskip);
406 * If there may be whiteout entries on the tape, pretend that the
407 * whiteout inode exists, so that the whiteout entries can be
411 SETINO(WINO, dumpmap);
417 * Prompt user to load a new dump volume.
418 * "Nextvol" is the next suggested volume to use.
419 * This suggested volume is enforced when doing full
420 * or incremental restores, but can be overridden by
421 * the user when only extracting a subset of the files.
426 long newvol = 0, wantnext = 0, i;
427 long saved_blksread = 0, saved_tpblksread = 0;
428 union u_spcl tmpspcl;
429 # define tmpbuf tmpspcl.s_spcl
431 int haderror = 0, bot_code = 1;
441 panic("Changing volumes on pipe input?\n");
446 saved_blksread = blksread;
447 saved_tpblksread = tpblksread;
448 #if defined(USE_QFA) && defined(sunos)
449 if (createtapeposflag || tapeposflag)
454 exit(1); /* pipes do not get a second chance */
455 if (aflag || curfile.action != SKIP) {
462 while (newvol <= 0) {
463 if (tapesread == 0) {
464 fprintf(stderr, "%s%s%s%s%s",
465 "You have not read any volumes yet.\n",
466 "Unless you know which volume your",
467 " file(s) are on you should start\n",
468 "with the last volume and work",
469 " towards the first.\n");
471 fprintf(stderr, "You have read volumes");
473 for (i = 1; i < 32; i++)
474 if (tapesread & (1 << i)) {
475 fprintf(stderr, "%s%ld", buf, (long)i);
478 fprintf(stderr, "\n");
481 fprintf(stderr, "Specify next volume # (none if no more volumes): ");
482 (void) fflush(stderr);
483 (void) fgets(buf, TP_BSIZE, terminal);
484 } while (!feof(terminal) && buf[0] == '\n');
487 if (!strcmp(buf, "none\n")) {
494 "Volume numbers are positive numerics\n");
497 if (newvol == volno) {
498 tapesread |= 1 << volno;
499 #if defined(USE_QFA) && defined(sunos)
500 if (createtapeposflag || tapeposflag) {
501 if (OpenSMTCmt(magtape) < 0) {
513 * if using an archive file, reset its name so readtape()
514 * could properly use remote access.
519 snprintf(magtape, MAXPATHLEN, "%s%03ld", magtapeprefix, newvol);
520 magtape[MAXPATHLEN - 1] = '\0';
522 if (bot_script && !haderror) {
523 msg("Launching %s\n", bot_script);
524 bot_code = system_command(bot_script, magtape, newvol);
525 if (bot_code != 0 && bot_code != 1) {
526 msg("Restore aborted by the beginning of tape script\n");
530 if (haderror || (bot_code && !Mflag)) {
532 fprintf(stderr, "Mount volume %ld\n", (long)newvol);
533 fprintf(stderr, "Enter ``none'' if there are no more volumes\n");
534 fprintf(stderr, "otherwise enter volume name (default: %s) ", magtape);
535 (void) fflush(stderr);
536 (void) fgets(buf, TP_BSIZE, terminal);
539 if (!strcmp(buf, "none\n")) {
543 if (buf[0] != '\n') {
545 (void) strncpy(magtape, buf, sizeof(magtape));
546 magtape[sizeof(magtape) - 1] = '\0';
547 if ((pos = strchr(magtape, '\n')))
548 magtape[pos - magtape] = '\0';
553 mt = rmtopen(magtape, O_RDONLY);
556 mt = OPEN(magtape, O_RDONLY, 0);
559 fprintf(stderr, "Cannot open %s\n", magtape);
566 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
567 readtape_func = readtape_set;
573 if (gethead(&tmpbuf) == FAIL) {
574 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
575 fprintf(stderr, "tape is not dump tape\n");
578 blksread = saved_blksread;
579 tpblksread = saved_tpblksread;
582 if (tmpbuf.c_volume != volno) {
583 fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume);
586 blksread = saved_blksread;
587 tpblksread = saved_tpblksread;
590 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
591 fprintf(stderr, "Wrong dump date\n\tgot: %s",
592 ctime4(&tmpbuf.c_date));
593 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
596 blksread = saved_blksread;
597 tpblksread = saved_tpblksread;
600 tapesread |= 1 << volno;
602 * If continuing from the previous volume, skip over any
603 * blocks read already at the end of the previous volume.
605 * If coming to this volume at random, skip to the beginning
606 * of the next record.
609 fprintf(stderr, "Dump tape is compressed.\n");
610 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB) && !defined(HAVE_LZO)
611 errx(1,"This restore version doesn't support decompression");
612 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
614 Dprintf(stdout, "read %ld recs, tape starts with %ld\n",
615 tpblksread - 1, (long)tmpbuf.c_firstrec);
616 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
618 tpblksread = tmpbuf.c_firstrec + 1;
619 for (i = tmpbuf.c_count; i > 0; i--)
621 } else if (tmpbuf.c_firstrec > 0 &&
622 tmpbuf.c_firstrec < tpblksread - 1) {
624 * -1 since we've read the volume header
626 i = tpblksread - tmpbuf.c_firstrec - 1;
627 Dprintf(stderr, "Skipping %ld duplicate record%s.\n",
628 (long)i, i > 1 ? "s" : "");
633 if (curfile.action == USING) {
635 panic("active file into volume 1\n");
639 * Skip up to the beginning of the next record
641 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
642 for (i = tmpbuf.c_count; i > 0; i--)
644 (void) gethead(&spcl);
648 siglongjmp(restart, 1);
653 * Handle unexpected EOF.
659 if (gettingfile && curfile.action == USING) {
660 printf("Warning: %s %s\n",
661 "End-of-input encountered while extracting", curfile.name);
663 curfile.name = "<name unknown>";
664 curfile.action = UNKNOWN;
666 curfile.ino = maxino;
669 siglongjmp(restart, 1);
674 * handle multiple dumps per tape by skipping forward to the
682 if (dumpnum == 1 || volno != 1)
685 errx(1, "Cannot have multiple dumps on pipe input");
687 tcom.mt_count = dumpnum - 1;
690 rmtioctl(MTFSF, dumpnum - 1);
693 if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0)
700 fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date));
701 fprintf(stdout, "Dumped from: %s",
702 (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate));
703 if (spcl.c_host[0] == '\0')
705 fprintf(stdout, "Level %d dump of %s on %s:%s\n",
706 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
707 fprintf(stdout, "Label: %s\n", spcl.c_label);
715 if (volinfo[1] == ROOTINO) {
716 printf("Starting inode numbers by volume:\n");
717 for (i = 1; i < (int)TP_NINOS && volinfo[i] != 0; ++i)
718 printf("\tVolume %d: %lu\n", i, (unsigned long)volinfo[i]);
724 time_t tv_sec; /* seconds */
725 suseconds_t tv_usec; /* and microseconds */
730 extractfile(struct entry *ep, int doremove)
734 struct timeval timep[2];
735 char *name = myname(ep);
737 /* If removal is requested (-r mode) do remove it unless
738 * we are extracting a metadata only inode */
739 if (spcl.c_flags & DR_METAONLY) {
740 Vprintf(stdout, "file %s is metadata only\n", name);
745 ep->e_flags &= ~REMOVED;
750 curfile.action = USING;
751 #if defined(__linux__) || defined(sunos)
752 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
753 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
754 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
755 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
756 #else /* __linux__ || sunos */
757 timep[0].tv_sec = curfile.dip->di_atime;
758 timep[0].tv_usec = curfile.dip->di_atimensec / 1000;
759 timep[1].tv_sec = curfile.dip->di_mtime;
760 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000;
761 #endif /* __linux__ */
762 mode = curfile.dip->di_mode;
763 flags = curfile.dip->di_flags;
764 switch (mode & IFMT) {
767 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
772 Vprintf(stdout, "skipped socket %s\n", name);
778 if (ep == NULL || ep->e_flags & EXTRACT)
779 panic("unextracted directory %s\n", name);
783 Vprintf(stdout, "extract file %s\n", name);
784 return (genliteraldir(name, curfile.ino));
789 uid_t luid = curfile.dip->di_uid;
790 gid_t lgid = curfile.dip->di_gid;
792 if (! (spcl.c_flags & DR_METAONLY)) {
795 getfile(xtrlnkfile, xtrlnkskip);
798 "%s: zero length symbolic link (ignored)\n", name);
801 if (linkit(lnkbuf, name, SYMLINK) == FAIL)
808 (void) lchown(name, luid, lgid);
814 Vprintf(stdout, "extract fifo %s\n", name);
819 if (! (spcl.c_flags & DR_METAONLY)) {
822 if (mkfifo(name, mode) < 0) {
823 warn("%s: cannot create fifo", name);
828 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
829 (void) chmod(name, mode);
832 (void) fsetflags(name, flags);
834 (void) chflags(name, flags);
842 Vprintf(stdout, "extract special file %s\n", name);
847 if (! (spcl.c_flags & DR_METAONLY)) {
850 if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) {
851 warn("%s: cannot create special file", name);
856 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
857 (void) chmod(name, mode);
861 warn("%s: fsetflags called on a special file", name);
862 (void) fsetflags(name, flags);
865 (void) chflags(name, flags);
873 uid_t luid = curfile.dip->di_uid;
874 gid_t lgid = curfile.dip->di_gid;
876 Vprintf(stdout, "extract file %s\n", name);
881 if (! (spcl.c_flags & DR_METAONLY)) {
884 if ((ofile = OPEN(name, O_WRONLY | O_CREAT | O_TRUNC,
886 warn("%s: cannot create file", name);
890 getfile(xtrfile, xtrskip);
895 (void) chown(name, luid, lgid);
896 (void) chmod(name, mode);
899 (void) fsetflags(name, flags);
901 (void) chflags(name, flags);
911 * skip over bit maps on the tape
917 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
922 * skip over a file on the tape
928 curfile.action = SKIP;
929 getfile(xtrnull, xtrnull);
933 * Extract a file from the tape.
934 * When an allocated block is found it is passed to the fill function;
935 * when an unallocated block (hole) is found, a zeroed buffer is passed
936 * to the skip function.
939 getfile(void (*fill) __P((char *, size_t)), void (*skip) __P((char *, size_t)))
942 volatile int curblk = 0;
943 volatile quad_t size = spcl.c_dinode.di_size;
944 volatile int last_write_was_hole = 0;
945 quad_t origsize = size;
946 static char clearedbuf[MAXBSIZE];
947 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
950 if (spcl.c_type == TS_END)
951 panic("ran off end of tape\n");
952 if (spcl.c_magic != NFS_MAGIC)
953 panic("not at beginning of a file\n");
954 if (!gettingfile && setjmp(restart) != 0)
958 for (i = 0; i < spcl.c_count; i++) {
959 if (readmapflag || spcl.c_addr[i]) {
960 readtape(&buf[curblk++][0]);
961 if (curblk == fssize / TP_BSIZE) {
962 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
963 fssize : (curblk - 1) * TP_BSIZE + size));
965 last_write_was_hole = 0;
969 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
971 (curblk - 1) * TP_BSIZE + size));
974 (*skip)(clearedbuf, (long)(size > TP_BSIZE ?
976 last_write_was_hole = 1;
978 if ((size -= TP_BSIZE) <= 0) {
979 for (i++; i < spcl.c_count; i++)
980 if (readmapflag || spcl.c_addr[i])
985 if (gethead(&spcl) == GOOD && size > 0) {
986 if (spcl.c_type == TS_ADDR)
989 "Missing address (header) block for %s at %ld blocks\n",
990 curfile.name, (long)blksread);
993 (*fill)((char *)buf, (size_t)((curblk * TP_BSIZE) + size));
994 last_write_was_hole = 0;
997 fprintf(stderr, "Missing blocks at the end of %s, assuming hole\n", curfile.name);
999 size_t skp = size > TP_BSIZE ? TP_BSIZE : size;
1000 (*skip)(clearedbuf, skp);
1003 last_write_was_hole = 1;
1005 if (last_write_was_hole) {
1006 FTRUNCATE(ofile, origsize);
1014 * Write out the next block of a file.
1017 xtrfile(char *buf, size_t size)
1022 if (write(ofile, buf, (int) size) == -1)
1023 err(1, "write error extracting inode %lu, name %s\nwrite",
1024 (unsigned long)curfile.ino, curfile.name);
1028 * Skip over a hole in a file.
1032 xtrskip(UNUSED(char *buf), size_t size)
1035 if (LSEEK(ofile, (OFF_T)size, SEEK_CUR) == -1)
1036 err(1, "seek error extracting inode %lu, name %s\nlseek",
1037 (unsigned long)curfile.ino, curfile.name);
1041 * Collect the next block of a symbolic link.
1044 xtrlnkfile(char *buf, size_t size)
1048 if (pathlen > MAXPATHLEN)
1049 errx(1, "symbolic link name: %s->%s%s; too long %d",
1050 curfile.name, lnkbuf, buf, pathlen);
1051 (void) strcat(lnkbuf, buf);
1055 * Skip over a hole in a symbolic link (should never happen).
1059 xtrlnkskip(UNUSED(char *buf), UNUSED(size_t size))
1062 errx(1, "unallocated block in symbolic link %s", curfile.name);
1066 * Collect the next block of a bit map.
1069 xtrmap(char *buf, size_t size)
1072 memmove(map, buf, size);
1077 * Skip over a hole in a bit map (should never happen).
1081 xtrmapskip(UNUSED(char *buf), size_t size)
1084 panic("hole in map\n");
1089 * Noop, when an extraction function is not needed.
1093 xtrnull(UNUSED(char *buf), UNUSED(size_t size))
1099 #if COMPARE_ONTHEFLY
1101 * Compare the next block of a file.
1104 xtrcmpfile(char *buf, size_t size)
1106 static char cmpbuf[MAXBSIZE];
1111 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1112 fprintf(stderr, "%s: size has changed.\n",
1118 if (memcmp(buf, cmpbuf, size) != 0) {
1119 fprintf(stderr, "%s: tape and disk copies are different\n",
1127 * Skip over a hole in a file.
1130 xtrcmpskip(UNUSED(char *buf), size_t size)
1132 static char cmpbuf[MAXBSIZE];
1138 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1139 fprintf(stderr, "%s: size has changed.\n",
1145 for (i = 0; i < (int)size; ++i)
1146 if (cmpbuf[i] != '\0') {
1147 fprintf(stderr, "%s: tape and disk copies are different\n",
1153 #endif /* COMPARE_ONTHEFLY */
1155 #if !COMPARE_ONTHEFLY
1157 do_cmpfiles(int fd_tape, int fd_disk, long size)
1159 static char buf_tape[BUFSIZ];
1160 static char buf_disk[BUFSIZ];
1165 if ((n_tape = read(fd_tape, buf_tape, sizeof(buf_tape))) < 1) {
1166 close(fd_tape), close(fd_disk);
1167 panic("do_cmpfiles: unexpected EOF[1]");
1169 if ((n_disk = read(fd_disk, buf_disk, sizeof(buf_tape))) < 1) {
1170 close(fd_tape), close(fd_disk);
1171 panic("do_cmpfiles: unexpected EOF[2]");
1173 if (n_tape != n_disk) {
1174 close(fd_tape), close(fd_disk);
1175 panic("do_cmpfiles: sizes different!");
1177 if (memcmp(buf_tape, buf_disk, (size_t)n_tape) != 0) return (1);
1183 /* for debugging compare problems */
1184 #undef COMPARE_FAIL_KEEP_FILE
1187 #ifdef COMPARE_FAIL_KEEP_FILE
1188 /* return true if tapefile should be unlinked after compare */
1193 cmpfiles(char *tapefile, char *diskfile, struct STAT *sbuf_disk)
1195 struct STAT sbuf_tape;
1196 int fd_tape, fd_disk;
1198 if (STAT(tapefile, &sbuf_tape) != 0) {
1199 panic("Can't lstat tmp file %s: %s\n", tapefile,
1204 if (sbuf_disk->st_size != sbuf_tape.st_size) {
1206 "%s: size changed from %ld to %ld.\n",
1207 diskfile, (long)sbuf_tape.st_size, (long)sbuf_disk->st_size);
1209 #ifdef COMPARE_FAIL_KEEP_FILE
1216 if ((fd_tape = OPEN(tapefile, O_RDONLY)) < 0) {
1217 panic("Can't open %s: %s\n", tapefile, strerror(errno));
1220 if ((fd_disk = OPEN(diskfile, O_RDONLY)) < 0) {
1222 panic("Can't open %s: %s\n", diskfile, strerror(errno));
1226 if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) {
1227 fprintf(stderr, "%s: tape and disk copies are different\n",
1232 #ifdef COMPARE_FAIL_KEEP_FILE
1233 /* rename the file to live in /tmp */
1234 /* rename `tapefile' to /tmp/<basename of diskfile> */
1236 char *p = strrchr(diskfile, '/');
1237 char newname[MAXPATHLEN];
1239 panic("can't find / in %s\n", diskfile);
1241 snprintf(newname, sizeof(newname), "%s/debug/%s", tmpdir, p + 1);
1242 if (rename(tapefile, newname)) {
1243 panic("rename from %s to %s failed: %s\n",
1247 fprintf(stderr, "*** %s saved to %s\n",
1252 /* don't unlink the file (it's not there anymore */
1261 #ifdef COMPARE_FAIL_KEEP_FILE
1265 #endif /* !COMPARE_ONTHEFLY */
1267 #if !COMPARE_ONTHEFLY
1268 static char tmpfilename[MAXPATHLEN];
1272 comparefile(char *name)
1277 #if !COMPARE_ONTHEFLY
1278 static char *tmpfile = NULL;
1282 curfile.name = name;
1283 curfile.action = USING;
1284 mode = curfile.dip->di_mode;
1286 if ((mode & IFMT) == IFSOCK) {
1287 Vprintf(stdout, "skipped socket %s\n", name);
1292 if ((r = LSTAT(name, &sb)) != 0) {
1293 warn("%s: does not exist (%d)", name, r);
1299 Vprintf(stdout, "comparing %s (size: %ld, mode: 0%o)\n", name,
1300 (long)sb.st_size, mode);
1302 if (sb.st_mode != mode) {
1303 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
1304 name, mode & 07777, sb.st_mode & 07777);
1307 if (spcl.c_flags & DR_METAONLY) {
1311 switch (mode & IFMT) {
1325 char lbuf[MAXPATHLEN + 1];
1328 if (!(sb.st_mode & S_IFLNK)) {
1329 fprintf(stderr, "%s: is no longer a symbolic link\n",
1336 getfile(xtrlnkfile, xtrlnkskip);
1339 "%s: zero length symbolic link (ignored)\n",
1344 if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) {
1345 panic("readlink of %s failed: %s", name,
1350 if (strcmp(lbuf, lnkbuf) != 0) {
1352 "%s: symbolic link changed from %s to %s.\n",
1353 name, lnkbuf, lbuf);
1362 if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) {
1363 fprintf(stderr, "%s: no longer a special file\n",
1370 if (sb.st_rdev != (dev_t)curfile.dip->di_rdev) {
1372 "%s: device changed from %d,%d to %d,%d.\n",
1374 ((int)curfile.dip->di_rdev >> 8) & 0xff,
1375 (int)curfile.dip->di_rdev & 0xff,
1376 ((int)sb.st_rdev >> 8) & 0xff,
1377 (int)sb.st_rdev & 0xff);
1384 #if COMPARE_ONTHEFLY
1385 if ((ifile = OPEN(name, O_RDONLY)) < 0) {
1386 panic("Can't open %s: %s\n", name, strerror(errno));
1392 getfile(xtrcmpfile, xtrcmpskip);
1395 if (read(ifile, &c, 1) != 0) {
1396 fprintf(stderr, "%s: size has changed.\n",
1406 if (tmpfile == NULL) {
1407 /* argument to mktemp() must not be in RO space: */
1408 snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir);
1409 tmpfile = mktemp(&tmpfilename[0]);
1411 if ((STAT(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) {
1412 panic("cannot delete tmp file %s: %s\n",
1413 tmpfile, strerror(errno));
1415 if ((ofile = OPEN(tmpfile, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) {
1416 panic("cannot create file temp file %s: %s\n",
1417 name, strerror(errno));
1419 getfile(xtrfile, xtrskip);
1420 (void) close(ofile);
1421 #ifdef COMPARE_FAIL_KEEP_FILE
1422 if (cmpfiles(tmpfile, name, &sb))
1425 cmpfiles(tmpfile, name, &sb);
1428 #endif /* COMPARE_ONTHEFLY */
1434 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1435 static void (*readtape_func)(char *) = readtape_set;
1438 * Read TP_BSIZE blocks from the input.
1439 * Handle read errors, and end of media.
1440 * Decompress compressed blocks.
1445 (*readtape_func)(buf); /* call the actual processing routine */
1449 * Set function pointer for readtape() routine. zflag and magtapein must
1450 * be correctly set before the first call to readtape().
1453 readtape_set(char *buf)
1456 readtape_func = readtape_uncompr;
1460 readtape_func = readtape_comprtape;
1462 readtape_func = readtape_comprfile;
1467 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
1470 * This is the original readtape(), it's used for reading uncompressed input.
1471 * Read TP_BSIZE blocks from the input.
1472 * Handle read errors, and end of media.
1475 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1476 readtape_uncompr(char *buf)
1481 ssize_t rd, newvol, i;
1482 int cnt, seek_failed;
1484 if (blkcnt < numtrec) {
1485 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1491 for (i = 0; i < ntrec; i++)
1492 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1495 cnt = ntrec * TP_BSIZE;
1498 if (createtapeposflag)
1499 (void)GetTapePos(&curtapepos);
1504 i = rmtread(&tapebuf[rd], cnt);
1507 i = read(mt, &tapebuf[rd], cnt);
1510 * Check for mid-tape short read error.
1511 * If found, skip rest of buffer and start with the next.
1513 if (!pipein && numtrec < ntrec && i > 0) {
1514 Dprintf(stdout, "mid-media short read error.\n");
1518 * Handle partial block read.
1520 if (pipein && i == 0 && rd > 0)
1522 else if (i > 0 && i != ntrec * TP_BSIZE) {
1531 * Short read. Process the blocks read.
1533 if (i % TP_BSIZE != 0)
1535 "partial block read: %ld should be %ld\n",
1536 (long)i, ntrec * TP_BSIZE);
1537 numtrec = i / TP_BSIZE;
1541 * Handle read error.
1544 fprintf(stderr, "Tape read error while ");
1545 switch (curfile.action) {
1547 fprintf(stderr, "trying to set up tape\n");
1550 fprintf(stderr, "trying to resynchronize\n");
1553 fprintf(stderr, "restoring %s\n", curfile.name);
1556 fprintf(stderr, "skipping over inode %lu\n",
1557 (unsigned long)curfile.ino);
1560 if (!yflag && !reply("continue"))
1562 i = ntrec * TP_BSIZE;
1563 memset(tapebuf, 0, (size_t)i);
1566 seek_failed = (rmtseek(i, 1) < 0);
1569 seek_failed = (LSEEK(mt, i, SEEK_CUR) == (OFF_T)-1);
1572 warn("continuation failed");
1573 if (!yflag && !reply("assume end-of-tape and continue"))
1579 * Handle end of tape.
1582 Vprintf(stdout, "End-of-tape encountered\n");
1591 if (rd % TP_BSIZE != 0)
1592 panic("partial block read: %d should be %d\n",
1593 rd, ntrec * TP_BSIZE);
1595 memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE);
1598 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1603 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1606 * Read a compressed format block from a file or pipe and uncompress it.
1607 * Attempt to handle read errors, and end of file.
1610 readtape_comprfile(char *buf)
1612 long rl, size, i, ret;
1614 struct tapebuf *tpb;
1616 if (blkcnt < numtrec) {
1617 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1622 /* need to read the next block */
1624 for (i = 0; i < ntrec; i++)
1625 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1627 tpb = (struct tapebuf *) tapebuf;
1629 /* read the block prefix */
1630 ret = read_a_block(mt, tapebuf, PREFIXSIZE, &rl);
1631 converttapebuf(tpb);
1633 if (Vflag && (ret == 0 || rl < (int)PREFIXSIZE || tpb->length == 0))
1640 if (size > bufsize) {
1641 /* something's wrong */
1642 Vprintf(stdout, "Prefix size error, max size %d, got %ld\n",
1645 tpb->length = bufsize;
1647 ret = read_a_block(mt, tpb->buf, size, &rl);
1651 tbufptr = decompress_tapebuf(tpb, rl + PREFIXSIZE);
1652 if (tbufptr == NULL) {
1653 msg_read_error("File decompression error while");
1654 if (!yflag && !reply("continue"))
1656 memset(tapebuf, 0, bufsize);
1661 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1667 /* Errors while reading from a file or pipe are catastrophic. Since
1668 * there are no block boundaries, it's impossible to bypass the
1669 * block in error and find the start of the next block.
1672 /* It's possible to have multiple input files using -M
1673 * and -f file1,file2...
1675 Vprintf(stdout, "End-of-File encountered\n");
1685 msg_read_error("Read error while");
1686 /* if (!yflag && !reply("continue")) */
1691 * Read compressed data from a tape and uncompress it.
1692 * Handle read errors, and end of media.
1693 * Since a tape consists of separate physical blocks, we try
1694 * to recover from errors by repositioning the tape to the next
1698 readtape_comprtape(char *buf)
1702 struct tapebuf *tpb;
1705 if (blkcnt < numtrec) {
1706 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1711 /* need to read the next block */
1713 for (i = 0; i < ntrec; i++)
1714 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1716 tpb = (struct tapebuf *) tapebuf;
1718 /* read the block */
1719 size = bufsize + PREFIXSIZE;
1720 ret = read_a_block(mt, tapebuf, size, &rl);
1724 converttapebuf(tpb);
1725 tbufptr = decompress_tapebuf(tpb, rl);
1726 if (tbufptr == NULL) {
1727 msg_read_error("Tape decompression error while");
1728 if (!yflag && !reply("continue"))
1730 memset(tapebuf, 0, PREFIXSIZE + bufsize);
1736 /* Handle errors: EOT switches to the next volume, other errors
1737 * attempt to position the tape to the next block.
1740 Vprintf(stdout, "End-of-tape encountered\n");
1749 msg_read_error("Tape read error while");
1750 if (!yflag && !reply("continue"))
1752 memset(tapebuf, 0, PREFIXSIZE + bufsize);
1757 rl = rmtioctl(MTFSR, 1);
1763 rl = ioctl(mt, MTIOCTOP, &tcom);
1767 warn("continuation failed");
1768 if (!yflag && !reply("assume end-of-tape and continue"))
1770 ret = 0; /* end of tape */
1776 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1782 * Decompress a struct tapebuf into a buffer. readsize is the size read
1783 * from the tape/file and is used for error messages. Returns a pointer
1784 * to the location of the uncompressed buffer or NULL on errors.
1785 * Adjust numtrec and complain for a short block.
1788 decompress_tapebuf(struct tapebuf *tpbin, int readsize)
1790 /* If zflag is on, all blocks have a struct tapebuf prefix */
1791 /* zflag gets set in setup() from the dump header */
1792 int cresult, blocklen;
1793 unsigned long worklen;
1795 unsigned int worklen2;
1797 char *output = NULL,*reason = NULL, *lengtherr = NULL;
1799 /* build a length error message */
1800 blocklen = tpbin->length;
1801 if (readsize < blocklen + (int)PREFIXSIZE)
1802 lengtherr = "short";
1804 if (readsize > blocklen + (int)PREFIXSIZE)
1809 if (tpbin->compressed) {
1810 /* uncompress whatever we read, if it fails, complain later */
1811 if (tpbin->flags == COMPRESS_ZLIB) {
1813 errx(1,"This restore version doesn't support zlib decompression");
1815 cresult = uncompress(comprbuf, &worklen,
1816 tpbin->buf, blocklen);
1822 reason = "not enough memory";
1825 reason = "buffer too small";
1828 reason = "data error";
1833 if (cresult == Z_OK)
1837 #endif /* HAVE_ZLIB */
1839 if (tpbin->flags == COMPRESS_BZLIB) {
1841 errx(1,"This restore version doesn't support bzlib decompression");
1844 cresult = BZ2_bzBuffToBuffDecompress(
1845 comprbuf, &worklen2,
1846 tpbin->buf, blocklen, 0, 0);
1853 reason = "not enough memory";
1855 case BZ_OUTBUFF_FULL:
1856 reason = "buffer too small";
1859 case BZ_DATA_ERROR_MAGIC:
1860 case BZ_UNEXPECTED_EOF:
1861 reason = "data error";
1866 if (cresult == BZ_OK)
1870 #endif /* HAVE_BZLIB */
1872 if (tpbin->flags == COMPRESS_LZO) {
1874 errx(1,"This restore version doesn't support lzo decompression");
1876 cresult = lzo1x_decompress(tpbin->buf, blocklen,
1877 comprbuf, (lzo_uintp) &worklen,NULL);
1883 case LZO_E_EOF_NOT_FOUND:
1884 reason = "data error";
1889 if (cresult == LZO_E_OK)
1893 #endif /* HAVE_LZO */
1897 output = tpbin->buf;
1901 numtrec = worklen / TP_BSIZE;
1902 if (worklen % TP_BSIZE != 0)
1903 reason = "length mismatch";
1907 fprintf(stderr, "%s compressed block: %d expected: %d\n",
1908 lengtherr, readsize, tpbin->length + PREFIXSIZE);
1909 fprintf(stderr, "decompression error, block %ld: %s\n",
1910 tpblksread+1, reason);
1918 * Print an error message for a read error.
1919 * This was exteracted from the original readtape().
1922 msg_read_error(char *m)
1924 switch (curfile.action) {
1926 fprintf(stderr, "%s trying to set up tape\n", m);
1929 fprintf(stderr, "%s trying to resynchronize\n", m);
1932 fprintf(stderr, "%s restoring %s\n", m, curfile.name);
1935 fprintf(stderr, "%s skipping over inode %lu\n", m,
1936 (unsigned long)curfile.ino);
1940 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
1943 * Read the first block and get the blocksize from it. Test
1944 * for a compressed dump tape/file. setup() will make the final
1945 * determination by checking the compressed flag if gethead()
1946 * finds a valid header. The test here is necessary to offset the buffer
1947 * by the size of the compressed prefix. zflag is set here so that
1948 * readtape_set can set the correct function pointer for readtape().
1949 * Note that the first block of each tape/file is not compressed
1950 * and does not have a prefix.
1953 findtapeblksize(void)
1957 struct tapebuf *tpb = (struct tapebuf *) tapebuf;
1958 struct s_spcl spclpt;
1960 for (i = 0; i < ntrec; i++)
1961 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1965 * For a pipe or file, read in the first record. For a tape, read
1968 len = magtapein ? ntrec * TP_BSIZE : TP_BSIZE;
1970 if (read_a_block(mt, tapebuf, len, &i) <= 0)
1971 errx(1, "Tape read error on first record");
1973 memcpy(&spclpt, tapebuf, TP_BSIZE);
1974 if (converthead(&spclpt) == FAIL) {
1976 if (converthead(&spclpt) == FAIL) {
1977 /* Special case for old compressed tapes with prefix */
1978 if (magtapein && (i % TP_BSIZE != 0))
1980 errx(1, "Tape is not a dump tape");
1982 fprintf(stderr, "Converting to new file system format.\n");
1985 * If the input is from a file or a pipe, we read TP_BSIZE
1986 * bytes looking for a dump header. If the dump is compressed
1987 * we need to read in the rest of the block, as determined
1988 * by c_ntrec in the dump header. The first block of the
1989 * dump is not compressed and does not have a prefix.
1992 if (spclpt.c_type == TS_TAPE
1993 && spclpt.c_flags & DR_COMPRESSED) {
1994 /* It's a compressed dump file, read in the */
1995 /* rest of the block based on spclpt.c_ntrec. */
1996 if (spclpt.c_ntrec > ntrec)
1997 errx(1, "Tape blocksize is too large, use "
1998 "\'-b %d\' ", spclpt.c_ntrec);
1999 ntrec = spclpt.c_ntrec;
2000 len = (ntrec - 1) * TP_BSIZE;
2004 /* read in the rest of the block based on bufsize */
2005 len = bufsize - TP_BSIZE;
2007 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) < 0
2008 || (i != (long)len && i % TP_BSIZE != 0))
2009 errx(1,"Error reading dump file header");
2012 Vprintf(stdout, "Input block size is %ld\n", ntrec);
2014 } /* if (!magtapein) */
2017 * If the input is a tape, we tried to read ntrec * TP_BSIZE bytes.
2018 * If the value of ntrec is too large, we read less than
2019 * what we asked for; adjust the value of ntrec and test for
2020 * a compressed dump tape.
2022 if (i % TP_BSIZE != 0) {
2024 /* may be old format compressed dump tape with a prefix */
2025 memcpy(&spclpt, tpb->buf, TP_BSIZE);
2027 if (converthead(&spclpt) == FAIL) {
2029 if (converthead(&spclpt) == FAIL)
2030 errx(1, "Tape is not a dump tape");
2031 fprintf(stderr, "Converting to new file system format.\n");
2033 if (i % TP_BSIZE == PREFIXSIZE
2034 && tpb->compressed == 0
2035 && spclpt.c_type == TS_TAPE
2036 && spclpt.c_flags & DR_COMPRESSED) {
2039 if (tpb->length > bufsize)
2040 errx(1, "Tape blocksize is too large, use "
2041 "\'-b %d\' ", tpb->length / TP_BSIZE);
2044 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
2047 ntrec = i / TP_BSIZE;
2048 if (spclpt.c_type == TS_TAPE) {
2049 if (spclpt.c_flags & DR_COMPRESSED)
2051 if (spclpt.c_ntrec > ntrec)
2052 errx(1, "Tape blocksize is too large, use "
2053 "\'-b %d\' ", spclpt.c_ntrec);
2056 Vprintf(stdout, "Tape block size is %ld\n", ntrec);
2060 * Read a block of data handling all of the messy details.
2062 static int read_a_block(int fd, char *buf, size_t len, long *lengthread)
2070 i = rmtread(buf, size);
2073 i = read(fd, buf, size);
2076 break; /* EOD or error */
2079 break; /* block at a time for mt */
2082 *lengthread = len - size;
2101 setmagtapein(void) {
2102 struct mtget mt_stat;
2103 static int done = 0;
2108 /* need to know if input is really from a tape */
2114 magtapein = ioctl(mt, MTIOCGET, (char *)&mt_stat) == 0;
2117 Vprintf(stdout,"Input is from a %s %s\n",
2118 host ? "remote" : "local",
2119 magtapein ? "tape" :
2120 Vflag ? "multi-volume (no tape)" : "file/pipe");
2124 * Read the next block from the tape.
2125 * Check to see if it is one of several vintage headers.
2126 * If it is an old style header, convert it to a new style header.
2127 * If it is not any valid header, return an error.
2130 gethead(struct s_spcl *buf)
2132 readtape((char *)buf);
2133 return converthead(buf);
2137 converthead(struct s_spcl *buf)
2145 char dummy[TP_BSIZE];
2152 u_int16_t c_inumber;
2157 u_int16_t odi_nlink;
2173 if (buf->c_magic != NFS_MAGIC) {
2174 if (swabi(buf->c_magic) != NFS_MAGIC)
2177 Vprintf(stdout, "Note: Doing Byte swapping\n");
2181 if (checksum((int *)buf) == FAIL)
2184 swabst((u_char *)"8i4s31i528bi192b3i", (u_char *)buf);
2187 memcpy(&u_ospcl.s_ospcl, buf, TP_BSIZE);
2188 memset((char *)buf, 0, (long)TP_BSIZE);
2189 buf->c_type = u_ospcl.s_ospcl.c_type;
2190 buf->c_date = u_ospcl.s_ospcl.c_date;
2191 buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
2192 buf->c_volume = u_ospcl.s_ospcl.c_volume;
2193 buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
2194 buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
2195 buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
2196 buf->c_magic = u_ospcl.s_ospcl.c_magic;
2197 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
2198 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
2199 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
2200 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
2201 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
2202 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
2203 #if defined(__linux__) || defined(sunos)
2204 buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime;
2205 buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2206 buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2207 #else /* __linux__ || sunos */
2208 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
2209 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2210 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2211 #endif /* __linux__ || sunos */
2212 buf->c_count = u_ospcl.s_ospcl.c_count;
2213 memmove(buf->c_addr, u_ospcl.s_ospcl.c_fill, (long)256);
2214 if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC ||
2215 checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
2217 buf->c_magic = NFS_MAGIC;
2220 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
2221 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
2222 qcvt.qval = buf->c_dinode.di_size;
2223 if (qcvt.val[0] || qcvt.val[1]) {
2224 Vprintf(stdout, "Note: Doing Quad swapping\n");
2229 qcvt.qval = buf->c_dinode.di_size;
2231 qcvt.val[1] = qcvt.val[0];
2233 buf->c_dinode.di_size = qcvt.qval;
2237 switch (buf->c_type) {
2242 * Have to patch up missing information in bit map headers
2245 buf->c_dinode.di_size = buf->c_count * TP_BSIZE;
2246 if (buf->c_count > TP_NINDIR)
2249 for (i = 0; i < buf->c_count; i++)
2254 if ((buf->c_flags & DR_NEWINODEFMT) == 0)
2259 if (buf->c_flags & DR_INODEINFO) {
2260 memcpy(volinfo, buf->c_inos, TP_NINOS * sizeof(dump_ino_t));
2262 swabst((u_char *)"128i", (u_char *)volinfo);
2271 panic("gethead: unknown inode type %d\n", buf->c_type);
2275 * If we are restoring a filesystem with old format inodes,
2276 * copy the uid/gid to the new location.
2279 buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
2280 buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
2288 converttapebuf(struct tapebuf *tpb)
2292 unsigned int length:28;
2293 unsigned int flags:3;
2294 unsigned int compressed:1;
2296 swabst((u_char *)"i", (u_char *)tpb);
2297 memcpy(&tb, tpb, 4);
2298 tpb->length = tb.length;
2299 tpb->flags = tb.flags;
2300 tpb->compressed = tb.compressed;
2305 * Check that a header is where it belongs and predict the next header
2308 accthdr(struct s_spcl *header)
2310 static dump_ino_t previno = 0x7fffffff;
2311 static int prevtype;
2312 static long predict;
2315 if (header->c_type == TS_TAPE) {
2316 fprintf(stderr, "Volume header (%s inode format) ",
2317 oldinofmt ? "old" : "new");
2318 if (header->c_firstrec)
2319 fprintf(stderr, "begins with record %d",
2320 header->c_firstrec);
2321 fprintf(stderr, "\n");
2322 previno = 0x7fffffff;
2325 if (previno == 0x7fffffff)
2329 fprintf(stderr, "Dumped inodes map header");
2332 fprintf(stderr, "Used inodes map header");
2335 fprintf(stderr, "File header, ino %lu", (unsigned long)previno);
2338 fprintf(stderr, "File continuation header, ino %ld", (long)previno);
2341 fprintf(stderr, "End of tape header");
2344 if (predict != blksread - 1)
2345 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
2346 predict, blksread - 1);
2347 fprintf(stderr, "\n");
2350 if (header->c_type != TS_END)
2351 for (i = 0; i < header->c_count; i++)
2352 if (readmapflag || header->c_addr[i] != 0)
2356 prevtype = header->c_type;
2357 previno = header->c_inumber;
2361 * Find an inode header.
2362 * Complain if had to skip, and complain is set.
2365 findinode(struct s_spcl *header)
2367 static long skipcnt = 0;
2371 curfile.name = "<name unknown>";
2372 curfile.action = UNKNOWN;
2376 if (header->c_magic != NFS_MAGIC) {
2378 while (gethead(header) == FAIL ||
2379 header->c_date != dumpdate)
2382 switch (header->c_type) {
2386 * Skip up to the beginning of the next record
2388 for (i = 0; i < header->c_count; i++)
2389 if (header->c_addr[i])
2391 while (gethead(header) == FAIL ||
2392 header->c_date != dumpdate)
2397 curfile.dip = &header->c_dinode;
2398 curfile.ino = header->c_inumber;
2402 curfile.ino = maxino;
2406 curfile.name = "<file removal list>";
2410 curfile.name = "<file dump list>";
2414 panic("unexpected tape header\n");
2418 panic("unknown tape header type %d\n", spcl.c_type);
2422 } while (header->c_type == TS_ADDR);
2427 fprintf(stderr, "resync restore, skipped %ld blocks\n",
2437 j = sizeof(union u_spcl) / sizeof(int);
2444 /* What happens if we want to read restore tapes
2445 for a 16bit int machine??? */
2451 if (i != CHECKSUM) {
2452 fprintf(stderr, "Checksum error %o, inode %lu file %s\n", i,
2453 (unsigned long)curfile.ino, curfile.name);
2463 #include <varargs.h>
2468 msg(const char *fmt, ...)
2481 (void)vfprintf(stderr, fmt, ap);
2484 #endif /* RRESTORE */
2487 swab16(u_char *sp, int n)
2492 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
2499 swab32(u_char *sp, int n)
2504 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
2505 c = sp[1]; sp[1] = sp[2]; sp[2] = c;
2512 swab64(u_char *sp, int n)
2517 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
2518 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
2519 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
2520 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
2527 swabst(u_char *cp, u_char *sp)
2533 case '0': case '1': case '2': case '3': case '4':
2534 case '5': case '6': case '7': case '8': case '9':
2535 n = (n * 10) + (*cp++ - '0');
2538 case 's': case 'w': case 'h':
2556 default: /* Any other character, like 'b' counts as byte. */
2570 swabst((u_char *)"i", (u_char *)&x);
2578 swabst((u_char *)"l", (u_char *)&x);
2585 * get the current position of the tape
2588 GetTapePos(long long *pos)
2594 *pos = (long long) rmtseek(0, SEEK_CUR);
2603 err = (ioctl(mt, MTIOCPOS, &mtpos) < 0);
2604 *pos = (long long)mtpos;
2607 *pos = LSEEK(mt, 0, SEEK_CUR);
2613 fprintf(stdout, "[%ld] error: %d (getting tapepos: %lld)\n",
2614 (unsigned long)getpid(), err, *pos);
2620 typedef struct mt_pos {
2623 } MTPosRec, *MTPosPtr;
2626 * go to specified position on tape
2629 GotoTapePos(long long pos)
2635 err = (rmtseek(pos, SEEK_SET) < 0);
2642 buf.mt_count = (int) pos;
2643 err = (ioctl(mt, MTIOCTOP, &buf) < 0);
2646 pos = LSEEK(mt, pos, SEEK_SET);
2652 fprintf(stdout, "[%ld] error: %d (setting tapepos: %lld)\n",
2653 (unsigned long)getpid(), err, pos);
2660 * read next data from tape to re-sync
2663 ReReadFromTape(void)
2667 if (gethead(&spcl) == FAIL) {
2669 fprintf(stdout, "DEBUG 1 gethead failed\n");
2677 ReReadInodeFromTape(dump_ino_t theino)
2686 } while (!(spcl.c_inumber == theino && spcl.c_type == TS_INODE && spcl.c_date == dumpdate) && (cntloop < ntrec));
2688 fprintf(stderr, "%ld reads\n", cntloop);
2689 if (cntloop == ntrec) {
2690 fprintf(stderr, "DEBUG: bufsize %d\n", bufsize);
2691 fprintf(stderr, "DEBUG: ntrec %ld\n", ntrec);
2697 #endif /* USE_QFA */
2700 RequestVol(long tnum)