2 * Ported to Linux's Second Extended File System as part of the
3 * dump and restore backup suit
4 * Remy Card <card@Linux.EU.Org>, 1994-1997
5 * Stelian Pop <stelian@popies.net>, 1999-2000
6 * Stelian Pop <stelian@popies.net> - AlcĂ´ve <www.alcove.com>, 2000-2002
10 * Copyright (c) 1983, 1993
11 * The Regents of the University of California. All rights reserved.
12 * (c) UNIX System Laboratories, Inc.
13 * All or some portions of this file are derived from material licensed
14 * to the University of California by American Telephone and Telegraph
15 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
16 * the permission of UNIX System Laboratories, Inc.
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution.
26 * 3. All advertising materials mentioning features or use of this software
27 * must display the following acknowledgement:
28 * This product includes software developed by the University of
29 * California, Berkeley and its contributors.
30 * 4. Neither the name of the University nor the names of its contributors
31 * may be used to endorse or promote products derived from this software
32 * without specific prior written permission.
34 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 static const char rcsid[] =
49 "$Id: tape.c,v 1.65 2002/11/15 09:25:42 stelian Exp $";
53 #include <compatlfs.h>
55 #include <compaterr.h>
63 #include <sys/param.h>
71 #ifdef HAVE_EXT2FS_EXT2_FS_H
72 #include <ext2fs/ext2_fs.h>
74 #include <linux/ext2_fs.h>
76 #include <ext2fs/ext2fs.h>
77 #include <bsdcompat.h>
79 #include <ufs/ufs/dinode.h>
80 #endif /* __linux__ */
81 #include <protocols/dumprestore.h>
85 #endif /* HAVE_ZLIB */
89 #endif /* HAVE_BZLIB */
93 #include "pathnames.h"
98 static long fssize = MAXBSIZE;
101 static int magtapein = 0; /* input is from magtape */
102 static char magtape[MAXPATHLEN];
103 static char magtapeprefix[MAXPATHLEN];
106 static char *tapebuf; /* input buffer for read */
107 static int bufsize; /* buffer size without prefix */
108 static char *tbufptr = NULL; /* active tape buffer */
109 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
110 static char *comprbuf; /* uncompress work buf */
111 static size_t comprlen; /* size including prefix */
113 static union u_spcl endoftapemark;
114 static long blksread; /* blocks read since last header */
115 static long tpblksread = 0; /* TP_BSIZE blocks read */
116 static long tapesread;
117 static sigjmp_buf restart;
118 static int gettingfile = 0; /* restart has a valid frame */
123 static char lnkbuf[MAXPATHLEN + 1];
126 int oldinofmt; /* old inode format conversion required */
127 int Bcvt; /* Swap Bytes (for CCI or sun) */
128 static int Qcvt; /* Swap quads (for sun) */
130 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
132 static void accthdr __P((struct s_spcl *));
133 static int checksum __P((int *));
134 static void findinode __P((struct s_spcl *));
135 static void findtapeblksize __P((void));
136 static int gethead __P((struct s_spcl *));
137 static void readtape __P((char *));
138 static void setdumpnum __P((void));
139 static u_int swabi __P((u_int));
141 static u_long swabl __P((u_long));
143 static u_char *swab64 __P((u_char *, int));
144 static u_char *swab32 __P((u_char *, int));
145 static u_char *swab16 __P((u_char *, int));
146 static void terminateinput __P((void));
147 static void xtrfile __P((char *, size_t));
148 static void xtrlnkfile __P((char *, size_t));
149 static void xtrlnkskip __P((char *, size_t));
150 static void xtrmap __P((char *, size_t));
151 static void xtrmapskip __P((char *, size_t));
152 static void xtrskip __P((char *, size_t));
153 static void setmagtapein __P((void));
155 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
156 static void newcomprbuf __P((int));
157 static void (*readtape_func) __P((char *));
158 static void readtape_set __P((char *));
159 static void readtape_uncompr __P((char *));
160 static void readtape_comprfile __P((char *));
161 static void readtape_comprtape __P((char *));
162 static char *decompress_tapebuf __P((struct tapebuf *, int));
163 static void msg_read_error __P((char *));
165 static int read_a_block __P((int, char *, size_t, long *));
166 #define PREFIXSIZE sizeof(struct tapebuf)
168 #define COMPARE_ONTHEFLY 1
171 static int ifile; /* input file for compare */
172 static int cmperror; /* compare error */
173 static void xtrcmpfile __P((char *, size_t));
174 static void xtrcmpskip __P((char *, size_t));
177 static int readmapflag;
178 static int readingmaps; /* set to 1 while reading the maps */
181 * Set up an input source. This is called from main.c before setup() is.
184 setinput(char *source)
190 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
194 if (strchr(source, ':')) {
196 source = strchr(host, ':');
198 if (rmthost(host) == 0)
202 if (strcmp(source, "-") == 0) {
204 * Since input is coming from a pipe we must establish
205 * our own connection to the terminal.
207 terminal = fopen(_PATH_TTY, "r");
208 if (terminal == NULL) {
209 warn("cannot open %s", _PATH_TTY);
210 terminal = fopen(_PATH_DEVNULL, "r");
211 if (terminal == NULL)
212 err(1, "cannot open %s", _PATH_DEVNULL);
216 setuid(getuid()); /* no longer need or want root privileges */
218 strncpy(magtapeprefix, source, MAXPATHLEN);
219 magtapeprefix[MAXPATHLEN-1] = '\0';
220 snprintf(magtape, MAXPATHLEN, "%s%03d", source, 1);
223 strncpy(magtape, source, MAXPATHLEN);
224 magtape[MAXPATHLEN - 1] = '\0';
228 newtapebuf(long size)
230 static int tapebufsize = -1;
233 bufsize = ntrec * TP_BSIZE;
234 if (size <= tapebufsize)
238 tapebuf = malloc(size * TP_BSIZE + sizeof(struct tapebuf));
240 errx(1, "Cannot allocate space for tape buffer");
244 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
246 newcomprbuf(int size)
248 size_t buf_size = (size+1) * TP_BSIZE + sizeof(struct tapebuf);
249 if (buf_size <= comprlen)
252 if (comprbuf != NULL)
254 comprbuf = malloc(comprlen);
255 if (comprbuf == NULL)
256 errx(1, "Cannot allocate space for decompress buffer");
258 #endif /* HAVE_ZLIB || HAVE_BZLIB */
261 * Verify that the tape drive can be accessed and
262 * that it actually is a dump tape.
267 int i, j, *ip, bot_code;
271 Vprintf(stdout, "Verify tape and initialize maps\n");
272 if (Afile == NULL && bot_script) {
273 msg("Launching %s\n", bot_script);
274 bot_code = system_command(bot_script, magtape, 1);
275 if (bot_code != 0 && bot_code != 1) {
276 msg("Restore aborted by the beginning of tape script\n");
288 mt = rmtopen(temptape, O_RDONLY);
294 mt = OPEN(temptape, O_RDONLY, 0);
296 err(1, "%s", magtape);
302 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
303 readtape_func = readtape_set;
307 if (gethead(&spcl) == FAIL) {
308 blkcnt--; /* push back this block */
312 if (gethead(&spcl) == FAIL)
313 errx(1, "Tape is not a dump tape");
314 fprintf(stderr, "Converting to new file system format.\n");
318 fprintf(stderr, "Dump tape is compressed.\n");
319 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB)
320 errx(1,"This restore version doesn't support decompression");
321 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
324 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC;
325 endoftapemark.s_spcl.c_type = TS_END;
326 ip = (int *)&endoftapemark;
327 j = sizeof(union u_spcl) / sizeof(int);
332 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
334 if (vflag || command == 't' || command == 'C')
337 if (tapeposflag && (unsigned long)spcl.c_date != qfadumpdate)
338 errx(1, "different QFA/dumpdates detected\n");
340 if (filesys[0] == '\0') {
342 strncpy(filesys, spcl.c_filesys, NAMELEN);
343 filesys[NAMELEN - 1] = '\0';
344 dirptr = strstr(filesys, " (dir");
348 dumptime = spcl.c_ddate;
349 dumpdate = spcl.c_date;
350 if (STAT(".", &stbuf) < 0)
351 err(1, "cannot stat .");
352 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
354 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
355 fssize = stbuf.st_blksize;
356 if (((fssize - 1) & fssize) != 0)
357 errx(1, "bad block size %ld", fssize);
358 if (spcl.c_volume != 1)
359 errx(1, "Tape is not volume 1 of the dump");
360 if (gethead(&spcl) == FAIL) {
361 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
362 panic("no header after volume mark!\n");
366 if (spcl.c_type != TS_CLRI)
367 errx(1, "Cannot find file removal list");
368 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
369 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
371 errx(1, "no memory for active inode map");
373 curfile.action = USING;
374 getfile(xtrmap, xtrmapskip);
375 while (spcl.c_type == TS_ADDR) {
376 /* Recompute maxino and the map */
377 dump_ino_t oldmaxino = maxino;
378 maxino += (spcl.c_count * TP_BSIZE * NBBY) + 1;
379 resizemaps(oldmaxino, maxino);
381 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
382 getfile(xtrmap, xtrmapskip);
384 Dprintf(stdout, "maxino = %lu\n", (unsigned long)maxino);
385 if (spcl.c_type != TS_BITS)
386 errx(1, "Cannot find file dump list");
387 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
388 if (map == (char *)NULL)
389 errx(1, "no memory for file dump list");
391 curfile.action = USING;
392 getfile(xtrmap, xtrmapskip);
393 while (spcl.c_type == TS_ADDR) {
394 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
395 getfile(xtrmap, xtrmapskip);
398 * If there may be whiteout entries on the tape, pretend that the
399 * whiteout inode exists, so that the whiteout entries can be
403 SETINO(WINO, dumpmap);
409 * Prompt user to load a new dump volume.
410 * "Nextvol" is the next suggested volume to use.
411 * This suggested volume is enforced when doing full
412 * or incremental restores, but can be overridden by
413 * the user when only extracting a subset of the files.
418 long newvol = 0, wantnext = 0, i;
419 long saved_blksread = 0, saved_tpblksread = 0;
420 union u_spcl tmpspcl;
421 # define tmpbuf tmpspcl.s_spcl
423 int haderror = 0, bot_code = 1;
433 panic("Changing volumes on pipe input?\n");
438 saved_blksread = blksread;
439 saved_tpblksread = tpblksread;
440 #if defined(USE_QFA) && defined(sunos)
441 if (createtapeposflag || tapeposflag)
446 exit(1); /* pipes do not get a second chance */
447 if (aflag || curfile.action != SKIP) {
454 while (newvol <= 0) {
455 if (tapesread == 0) {
456 fprintf(stderr, "%s%s%s%s%s",
457 "You have not read any volumes yet.\n",
458 "Unless you know which volume your",
459 " file(s) are on you should start\n",
460 "with the last volume and work",
461 " towards the first.\n");
463 fprintf(stderr, "You have read volumes");
465 for (i = 1; i < 32; i++)
466 if (tapesread & (1 << i)) {
467 fprintf(stderr, "%s%ld", buf, (long)i);
470 fprintf(stderr, "\n");
473 fprintf(stderr, "Specify next volume # (none if no more volumes): ");
474 (void) fflush(stderr);
475 (void) fgets(buf, TP_BSIZE, terminal);
476 } while (!feof(terminal) && buf[0] == '\n');
479 if (!strcmp(buf, "none\n")) {
486 "Volume numbers are positive numerics\n");
489 if (newvol == volno) {
490 tapesread |= 1 << volno;
491 #if defined(USE_QFA) && defined(sunos)
492 if (createtapeposflag || tapeposflag) {
493 if (OpenSMTCmt(magtape) < 0) {
504 snprintf(magtape, MAXPATHLEN, "%s%03ld", magtapeprefix, newvol);
505 magtape[MAXPATHLEN - 1] = '\0';
507 if (bot_script && !haderror) {
508 msg("Launching %s\n", bot_script);
509 bot_code = system_command(bot_script, magtape, newvol);
510 if (bot_code != 0 && bot_code != 1) {
511 msg("Restore aborted by the beginning of tape script\n");
515 if (haderror || (bot_code && !Mflag)) {
517 fprintf(stderr, "Mount volume %ld\n", (long)newvol);
518 fprintf(stderr, "Enter ``none'' if there are no more volumes\n");
519 fprintf(stderr, "otherwise enter volume name (default: %s) ", magtape);
520 (void) fflush(stderr);
521 (void) fgets(buf, TP_BSIZE, terminal);
524 if (!strcmp(buf, "none\n")) {
528 if (buf[0] != '\n') {
530 (void) strncpy(magtape, buf, sizeof(magtape));
531 magtape[sizeof(magtape) - 1] = '\0';
532 if ((pos = strchr(magtape, '\n')))
533 magtape[pos - magtape] = '\0';
538 mt = rmtopen(magtape, O_RDONLY);
541 mt = OPEN(magtape, O_RDONLY, 0);
544 fprintf(stderr, "Cannot open %s\n", magtape);
551 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
552 readtape_func = readtape_set;
558 if (gethead(&tmpbuf) == FAIL) {
559 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
560 fprintf(stderr, "tape is not dump tape\n");
563 blksread = saved_blksread;
564 tpblksread = saved_tpblksread;
567 if (tmpbuf.c_volume != volno) {
568 fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume);
571 blksread = saved_blksread;
572 tpblksread = saved_tpblksread;
575 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
576 fprintf(stderr, "Wrong dump date\n\tgot: %s",
577 ctime4(&tmpbuf.c_date));
578 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
581 blksread = saved_blksread;
582 tpblksread = saved_tpblksread;
585 tapesread |= 1 << volno;
587 * If continuing from the previous volume, skip over any
588 * blocks read already at the end of the previous volume.
590 * If coming to this volume at random, skip to the beginning
591 * of the next record.
594 fprintf(stderr, "Dump tape is compressed.\n");
595 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB)
596 errx(1,"This restore version doesn't support decompression");
597 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
599 Dprintf(stdout, "read %ld recs, tape starts with %ld\n",
600 tpblksread - 1, (long)tmpbuf.c_firstrec);
601 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
603 tpblksread = tmpbuf.c_firstrec + 1;
604 for (i = tmpbuf.c_count; i > 0; i--)
606 } else if (tmpbuf.c_firstrec > 0 &&
607 tmpbuf.c_firstrec < tpblksread - 1) {
609 * -1 since we've read the volume header
611 i = tpblksread - tmpbuf.c_firstrec - 1;
612 Dprintf(stderr, "Skipping %ld duplicate record%s.\n",
613 (long)i, i > 1 ? "s" : "");
618 if (curfile.action == USING) {
620 panic("active file into volume 1\n");
624 * Skip up to the beginning of the next record
626 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
627 for (i = tmpbuf.c_count; i > 0; i--)
629 (void) gethead(&spcl);
633 siglongjmp(restart, 1);
638 * Handle unexpected EOF.
644 if (gettingfile && curfile.action == USING) {
645 printf("Warning: %s %s\n",
646 "End-of-input encountered while extracting", curfile.name);
648 curfile.name = "<name unknown>";
649 curfile.action = UNKNOWN;
651 curfile.ino = maxino;
654 siglongjmp(restart, 1);
659 * handle multiple dumps per tape by skipping forward to the
667 if (dumpnum == 1 || volno != 1)
670 errx(1, "Cannot have multiple dumps on pipe input");
672 tcom.mt_count = dumpnum - 1;
675 rmtioctl(MTFSF, dumpnum - 1);
678 if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0)
685 fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date));
686 fprintf(stdout, "Dumped from: %s",
687 (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate));
688 if (spcl.c_host[0] == '\0')
690 fprintf(stdout, "Level %d dump of %s on %s:%s\n",
691 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
692 fprintf(stdout, "Label: %s\n", spcl.c_label);
700 if (volinfo[1] == ROOTINO) {
701 printf("Starting inode numbers by volume:\n");
702 for (i = 1; i < (int)TP_NINOS && volinfo[i] != 0; ++i)
703 printf("\tVolume %d: %lu\n", i, (unsigned long)volinfo[i]);
709 time_t tv_sec; /* seconds */
710 suseconds_t tv_usec; /* and microseconds */
715 extractfile(struct entry *ep, int doremove)
719 struct timeval timep[2];
720 char *name = myname(ep);
722 /* If removal is requested (-r mode) do remove it unless
723 * we are extracting a metadata only inode */
724 if (spcl.c_flags & DR_METAONLY) {
725 Vprintf(stdout, "file %s is metadata only\n", name);
730 ep->e_flags &= ~REMOVED;
735 curfile.action = USING;
736 #if defined(__linux__) || defined(sunos)
737 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
738 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
739 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
740 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
741 #else /* __linux__ || sunos */
742 timep[0].tv_sec = curfile.dip->di_atime;
743 timep[0].tv_usec = curfile.dip->di_atimensec / 1000;
744 timep[1].tv_sec = curfile.dip->di_mtime;
745 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000;
746 #endif /* __linux__ */
747 mode = curfile.dip->di_mode;
748 flags = curfile.dip->di_flags;
749 switch (mode & IFMT) {
752 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
757 Vprintf(stdout, "skipped socket %s\n", name);
763 if (ep == NULL || ep->e_flags & EXTRACT)
764 panic("unextracted directory %s\n", name);
768 Vprintf(stdout, "extract file %s\n", name);
769 return (genliteraldir(name, curfile.ino));
774 uid_t luid = curfile.dip->di_uid;
775 gid_t lgid = curfile.dip->di_gid;
777 if (! (spcl.c_flags & DR_METAONLY)) {
780 getfile(xtrlnkfile, xtrlnkskip);
783 "%s: zero length symbolic link (ignored)\n", name);
786 if (linkit(lnkbuf, name, SYMLINK) == FAIL)
793 (void) lchown(name, luid, lgid);
799 Vprintf(stdout, "extract fifo %s\n", name);
804 if (! (spcl.c_flags & DR_METAONLY)) {
807 if (mkfifo(name, mode) < 0) {
808 warn("%s: cannot create fifo", name);
813 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
814 (void) chmod(name, mode);
817 (void) fsetflags(name, flags);
819 (void) chflags(name, flags);
827 Vprintf(stdout, "extract special file %s\n", name);
832 if (! (spcl.c_flags & DR_METAONLY)) {
835 if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) {
836 warn("%s: cannot create special file", name);
841 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
842 (void) chmod(name, mode);
846 warn("%s: fsetflags called on a special file", name);
847 (void) fsetflags(name, flags);
850 (void) chflags(name, flags);
858 uid_t luid = curfile.dip->di_uid;
859 gid_t lgid = curfile.dip->di_gid;
861 Vprintf(stdout, "extract file %s\n", name);
866 if (! (spcl.c_flags & DR_METAONLY)) {
869 if ((ofile = OPEN(name, O_WRONLY | O_CREAT | O_TRUNC,
871 warn("%s: cannot create file", name);
875 getfile(xtrfile, xtrskip);
880 (void) chown(name, luid, lgid);
881 (void) chmod(name, mode);
884 (void) fsetflags(name, flags);
886 (void) chflags(name, flags);
896 * skip over bit maps on the tape
902 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
907 * skip over a file on the tape
913 curfile.action = SKIP;
914 getfile(xtrnull, xtrnull);
918 * Extract a file from the tape.
919 * When an allocated block is found it is passed to the fill function;
920 * when an unallocated block (hole) is found, a zeroed buffer is passed
921 * to the skip function.
924 getfile(void (*fill) __P((char *, size_t)), void (*skip) __P((char *, size_t)))
927 volatile int curblk = 0;
928 volatile quad_t size = spcl.c_dinode.di_size;
929 volatile int last_write_was_hole = 0;
930 quad_t origsize = size;
931 static char clearedbuf[MAXBSIZE];
932 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
935 if (spcl.c_type == TS_END)
936 panic("ran off end of tape\n");
937 if (spcl.c_magic != NFS_MAGIC)
938 panic("not at beginning of a file\n");
939 if (!gettingfile && setjmp(restart) != 0)
943 for (i = 0; i < spcl.c_count; i++) {
944 if (readmapflag || spcl.c_addr[i]) {
945 readtape(&buf[curblk++][0]);
946 if (curblk == fssize / TP_BSIZE) {
947 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
948 fssize : (curblk - 1) * TP_BSIZE + size));
950 last_write_was_hole = 0;
954 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
956 (curblk - 1) * TP_BSIZE + size));
959 (*skip)(clearedbuf, (long)(size > TP_BSIZE ?
961 last_write_was_hole = 1;
963 if ((size -= TP_BSIZE) <= 0) {
964 for (i++; i < spcl.c_count; i++)
965 if (readmapflag || spcl.c_addr[i])
970 if (gethead(&spcl) == GOOD && size > 0) {
971 if (spcl.c_type == TS_ADDR)
974 "Missing address (header) block for %s at %ld blocks\n",
975 curfile.name, (long)blksread);
978 (*fill)((char *)buf, (size_t)((curblk * TP_BSIZE) + size));
979 last_write_was_hole = 0;
982 fprintf(stderr, "Missing blocks at the end of %s, assuming hole\n", curfile.name);
984 size_t skp = size > TP_BSIZE ? TP_BSIZE : size;
985 (*skip)(clearedbuf, skp);
988 last_write_was_hole = 1;
990 if (last_write_was_hole) {
991 FTRUNCATE(ofile, origsize);
999 * Write out the next block of a file.
1002 xtrfile(char *buf, size_t size)
1007 if (write(ofile, buf, (int) size) == -1)
1008 err(1, "write error extracting inode %lu, name %s\nwrite",
1009 (unsigned long)curfile.ino, curfile.name);
1013 * Skip over a hole in a file.
1017 xtrskip(UNUSED(char *buf), size_t size)
1020 if (LSEEK(ofile, (off_t)size, SEEK_CUR) == -1)
1021 err(1, "seek error extracting inode %lu, name %s\nlseek",
1022 (unsigned long)curfile.ino, curfile.name);
1026 * Collect the next block of a symbolic link.
1029 xtrlnkfile(char *buf, size_t size)
1033 if (pathlen > MAXPATHLEN)
1034 errx(1, "symbolic link name: %s->%s%s; too long %d",
1035 curfile.name, lnkbuf, buf, pathlen);
1036 (void) strcat(lnkbuf, buf);
1040 * Skip over a hole in a symbolic link (should never happen).
1044 xtrlnkskip(UNUSED(char *buf), UNUSED(size_t size))
1047 errx(1, "unallocated block in symbolic link %s", curfile.name);
1051 * Collect the next block of a bit map.
1054 xtrmap(char *buf, size_t size)
1057 memmove(map, buf, size);
1062 * Skip over a hole in a bit map (should never happen).
1066 xtrmapskip(UNUSED(char *buf), size_t size)
1069 panic("hole in map\n");
1074 * Noop, when an extraction function is not needed.
1078 xtrnull(UNUSED(char *buf), UNUSED(size_t size))
1084 #if COMPARE_ONTHEFLY
1086 * Compare the next block of a file.
1089 xtrcmpfile(char *buf, size_t size)
1091 static char cmpbuf[MAXBSIZE];
1096 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1097 fprintf(stderr, "%s: size has changed.\n",
1103 if (memcmp(buf, cmpbuf, size) != 0) {
1104 fprintf(stderr, "%s: tape and disk copies are different\n",
1112 * Skip over a hole in a file.
1115 xtrcmpskip(UNUSED(char *buf), size_t size)
1117 static char cmpbuf[MAXBSIZE];
1123 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1124 fprintf(stderr, "%s: size has changed.\n",
1130 for (i = 0; i < (int)size; ++i)
1131 if (cmpbuf[i] != '\0') {
1132 fprintf(stderr, "%s: tape and disk copies are different\n",
1138 #endif /* COMPARE_ONTHEFLY */
1140 #if !COMPARE_ONTHEFLY
1142 do_cmpfiles(int fd_tape, int fd_disk, long size)
1144 static char buf_tape[BUFSIZ];
1145 static char buf_disk[BUFSIZ];
1150 if ((n_tape = read(fd_tape, buf_tape, sizeof(buf_tape))) < 1) {
1151 close(fd_tape), close(fd_disk);
1152 panic("do_cmpfiles: unexpected EOF[1]");
1154 if ((n_disk = read(fd_disk, buf_disk, sizeof(buf_tape))) < 1) {
1155 close(fd_tape), close(fd_disk);
1156 panic("do_cmpfiles: unexpected EOF[2]");
1158 if (n_tape != n_disk) {
1159 close(fd_tape), close(fd_disk);
1160 panic("do_cmpfiles: sizes different!");
1162 if (memcmp(buf_tape, buf_disk, (size_t)n_tape) != 0) return (1);
1168 /* for debugging compare problems */
1169 #undef COMPARE_FAIL_KEEP_FILE
1172 #ifdef COMPARE_FAIL_KEEP_FILE
1173 /* return true if tapefile should be unlinked after compare */
1178 cmpfiles(char *tapefile, char *diskfile, struct STAT *sbuf_disk)
1180 struct STAT sbuf_tape;
1181 int fd_tape, fd_disk;
1183 if (STAT(tapefile, &sbuf_tape) != 0) {
1184 panic("Can't lstat tmp file %s: %s\n", tapefile,
1189 if (sbuf_disk->st_size != sbuf_tape.st_size) {
1191 "%s: size changed from %ld to %ld.\n",
1192 diskfile, (long)sbuf_tape.st_size, (long)sbuf_disk->st_size);
1194 #ifdef COMPARE_FAIL_KEEP_FILE
1201 if ((fd_tape = OPEN(tapefile, O_RDONLY)) < 0) {
1202 panic("Can't open %s: %s\n", tapefile, strerror(errno));
1205 if ((fd_disk = OPEN(diskfile, O_RDONLY)) < 0) {
1207 panic("Can't open %s: %s\n", diskfile, strerror(errno));
1211 if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) {
1212 fprintf(stderr, "%s: tape and disk copies are different\n",
1217 #ifdef COMPARE_FAIL_KEEP_FILE
1218 /* rename the file to live in /tmp */
1219 /* rename `tapefile' to /tmp/<basename of diskfile> */
1221 char *p = strrchr(diskfile, '/');
1222 char newname[MAXPATHLEN];
1224 panic("can't find / in %s\n", diskfile);
1226 snprintf(newname, sizeof(newname), "%s/debug/%s", tmpdir, p + 1);
1227 if (rename(tapefile, newname)) {
1228 panic("rename from %s to %s failed: %s\n",
1232 fprintf(stderr, "*** %s saved to %s\n",
1237 /* don't unlink the file (it's not there anymore */
1246 #ifdef COMPARE_FAIL_KEEP_FILE
1250 #endif /* !COMPARE_ONTHEFLY */
1252 #if !COMPARE_ONTHEFLY
1253 static char tmpfilename[MAXPATHLEN];
1257 comparefile(char *name)
1262 #if !COMPARE_ONTHEFLY
1263 static char *tmpfile = NULL;
1267 if ((r = LSTAT(name, &sb)) != 0) {
1268 warn("%s: does not exist (%d)", name, r);
1274 curfile.name = name;
1275 curfile.action = USING;
1276 mode = curfile.dip->di_mode;
1278 Vprintf(stdout, "comparing %s (size: %ld, mode: 0%o)\n", name,
1279 (long)sb.st_size, mode);
1281 if (sb.st_mode != mode) {
1282 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
1283 name, mode & 07777, sb.st_mode & 07777);
1286 if (spcl.c_flags & DR_METAONLY) {
1290 switch (mode & IFMT) {
1304 char lbuf[MAXPATHLEN + 1];
1307 if (!(sb.st_mode & S_IFLNK)) {
1308 fprintf(stderr, "%s: is no longer a symbolic link\n",
1315 getfile(xtrlnkfile, xtrlnkskip);
1318 "%s: zero length symbolic link (ignored)\n",
1323 if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) {
1324 panic("readlink of %s failed: %s", name,
1329 if (strcmp(lbuf, lnkbuf) != 0) {
1331 "%s: symbolic link changed from %s to %s.\n",
1332 name, lnkbuf, lbuf);
1341 if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) {
1342 fprintf(stderr, "%s: no longer a special file\n",
1349 if (sb.st_rdev != (dev_t)curfile.dip->di_rdev) {
1351 "%s: device changed from %d,%d to %d,%d.\n",
1353 ((int)curfile.dip->di_rdev >> 8) & 0xff,
1354 (int)curfile.dip->di_rdev & 0xff,
1355 ((int)sb.st_rdev >> 8) & 0xff,
1356 (int)sb.st_rdev & 0xff);
1363 #if COMPARE_ONTHEFLY
1364 if ((ifile = OPEN(name, O_RDONLY)) < 0) {
1365 panic("Can't open %s: %s\n", name, strerror(errno));
1371 getfile(xtrcmpfile, xtrcmpskip);
1374 if (read(ifile, &c, 1) != 0) {
1375 fprintf(stderr, "%s: size has changed.\n",
1385 if (tmpfile == NULL) {
1386 /* argument to mktemp() must not be in RO space: */
1387 snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir);
1388 tmpfile = mktemp(&tmpfilename[0]);
1390 if ((STAT(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) {
1391 panic("cannot delete tmp file %s: %s\n",
1392 tmpfile, strerror(errno));
1394 if ((ofile = OPEN(tmpfile, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) {
1395 panic("cannot create file temp file %s: %s\n",
1396 name, strerror(errno));
1398 getfile(xtrfile, xtrskip);
1399 (void) close(ofile);
1400 #ifdef COMPARE_FAIL_KEEP_FILE
1401 if (cmpfiles(tmpfile, name, &sb))
1404 cmpfiles(tmpfile, name, &sb);
1407 #endif /* COMPARE_ONTHEFLY */
1413 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1414 static void (*readtape_func)(char *) = readtape_set;
1417 * Read TP_BSIZE blocks from the input.
1418 * Handle read errors, and end of media.
1419 * Decompress compressed blocks.
1424 (*readtape_func)(buf); /* call the actual processing routine */
1428 * Set function pointer for readtape() routine. zflag and magtapein must
1429 * be correctly set before the first call to readtape().
1432 readtape_set(char *buf)
1435 readtape_func = readtape_uncompr;
1439 readtape_func = readtape_comprtape;
1441 readtape_func = readtape_comprfile;
1446 #endif /* HAVE_ZLIB || HAVE_BZLIB */
1449 * This is the original readtape(), it's used for reading uncompressed input.
1450 * Read TP_BSIZE blocks from the input.
1451 * Handle read errors, and end of media.
1454 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1455 readtape_uncompr(char *buf)
1460 ssize_t rd, newvol, i;
1461 int cnt, seek_failed;
1463 if (blkcnt < numtrec) {
1464 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1470 for (i = 0; i < ntrec; i++)
1471 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1474 cnt = ntrec * TP_BSIZE;
1477 if (createtapeposflag)
1478 (void)GetTapePos(&curtapepos);
1483 i = rmtread(&tapebuf[rd], cnt);
1486 i = read(mt, &tapebuf[rd], cnt);
1489 * Check for mid-tape short read error.
1490 * If found, skip rest of buffer and start with the next.
1492 if (!pipein && numtrec < ntrec && i > 0) {
1493 Dprintf(stdout, "mid-media short read error.\n");
1497 * Handle partial block read.
1499 if (pipein && i == 0 && rd > 0)
1501 else if (i > 0 && i != ntrec * TP_BSIZE) {
1510 * Short read. Process the blocks read.
1512 if (i % TP_BSIZE != 0)
1514 "partial block read: %ld should be %ld\n",
1515 (long)i, ntrec * TP_BSIZE);
1516 numtrec = i / TP_BSIZE;
1520 * Handle read error.
1523 fprintf(stderr, "Tape read error while ");
1524 switch (curfile.action) {
1526 fprintf(stderr, "trying to set up tape\n");
1529 fprintf(stderr, "trying to resynchronize\n");
1532 fprintf(stderr, "restoring %s\n", curfile.name);
1535 fprintf(stderr, "skipping over inode %lu\n",
1536 (unsigned long)curfile.ino);
1539 if (!yflag && !reply("continue"))
1541 i = ntrec * TP_BSIZE;
1542 memset(tapebuf, 0, (size_t)i);
1545 seek_failed = (rmtseek(i, 1) < 0);
1548 seek_failed = (LSEEK(mt, i, SEEK_CUR) == (off_t)-1);
1551 warn("continuation failed");
1552 if (!yflag && !reply("assume end-of-tape and continue"))
1558 * Handle end of tape.
1561 Vprintf(stdout, "End-of-tape encountered\n");
1570 if (rd % TP_BSIZE != 0)
1571 panic("partial block read: %d should be %d\n",
1572 rd, ntrec * TP_BSIZE);
1574 memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE);
1577 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1582 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1585 * Read a compressed format block from a file or pipe and uncompress it.
1586 * Attempt to handle read errors, and end of file.
1589 readtape_comprfile(char *buf)
1591 long rl, size, i, ret;
1593 struct tapebuf *tpb;
1595 if (blkcnt < numtrec) {
1596 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1601 /* need to read the next block */
1603 for (i = 0; i < ntrec; i++)
1604 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1606 tpb = (struct tapebuf *) tapebuf;
1608 /* read the block prefix */
1609 ret = read_a_block(mt, tapebuf, PREFIXSIZE, &rl);
1611 if (Vflag && (ret == 0 || rl < (int)PREFIXSIZE || tpb->length == 0))
1618 if (size > bufsize) {
1619 /* something's wrong */
1620 Vprintf(stdout, "Prefix size error, max size %d, got %ld\n",
1623 tpb->length = bufsize;
1625 ret = read_a_block(mt, tpb->buf, size, &rl);
1629 tbufptr = decompress_tapebuf(tpb, rl + PREFIXSIZE);
1630 if (tbufptr == NULL) {
1631 msg_read_error("File decompression error while");
1632 if (!yflag && !reply("continue"))
1634 memset(tapebuf, 0, bufsize);
1639 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1645 /* Errors while reading from a file or pipe are catastrophic. Since
1646 * there are no block boundaries, it's impossible to bypass the
1647 * block in error and find the start of the next block.
1650 /* It's possible to have multiple input files using -M
1651 * and -f file1,file2...
1653 Vprintf(stdout, "End-of-File encountered\n");
1663 msg_read_error("Read error while");
1664 /* if (!yflag && !reply("continue")) */
1669 * Read compressed data from a tape and uncompress it.
1670 * Handle read errors, and end of media.
1671 * Since a tape consists of separate physical blocks, we try
1672 * to recover from errors by repositioning the tape to the next
1676 readtape_comprtape(char *buf)
1680 struct tapebuf *tpb;
1683 if (blkcnt < numtrec) {
1684 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1689 /* need to read the next block */
1691 for (i = 0; i < ntrec; i++)
1692 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1694 tpb = (struct tapebuf *) tapebuf;
1696 /* read the block */
1697 size = bufsize + PREFIXSIZE;
1698 ret = read_a_block(mt, tapebuf, size, &rl);
1702 tbufptr = decompress_tapebuf(tpb, rl);
1703 if (tbufptr == NULL) {
1704 msg_read_error("Tape decompression error while");
1705 if (!yflag && !reply("continue"))
1707 memset(tapebuf, 0, PREFIXSIZE + bufsize);
1713 /* Handle errors: EOT switches to the next volume, other errors
1714 * attempt to position the tape to the next block.
1717 Vprintf(stdout, "End-of-tape encountered\n");
1726 msg_read_error("Tape read error while");
1727 if (!yflag && !reply("continue"))
1729 memset(tapebuf, 0, PREFIXSIZE + bufsize);
1734 rl = rmtioctl(MTFSR, 1);
1740 rl = ioctl(mt, MTIOCTOP, &tcom);
1744 warn("continuation failed");
1745 if (!yflag && !reply("assume end-of-tape and continue"))
1747 ret = 0; /* end of tape */
1753 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1759 * Decompress a struct tapebuf into a buffer. readsize is the size read
1760 * from the tape/file and is used for error messages. Returns a pointer
1761 * to the location of the uncompressed buffer or NULL on errors.
1762 * Adjust numtrec and complain for a short block.
1765 decompress_tapebuf(struct tapebuf *tpbin, int readsize)
1767 /* If zflag is on, all blocks have a struct tapebuf prefix */
1768 /* zflag gets set in setup() from the dump header */
1769 int cresult, blocklen;
1770 unsigned long worklen;
1772 unsigned int worklen2;
1774 char *output = NULL,*reason = NULL, *lengtherr = NULL;
1776 /* build a length error message */
1777 blocklen = tpbin->length;
1778 if (readsize < blocklen + (int)PREFIXSIZE)
1779 lengtherr = "short";
1781 if (readsize > blocklen + (int)PREFIXSIZE)
1786 if (tpbin->compressed) {
1787 /* uncompress whatever we read, if it fails, complain later */
1788 if (tpbin->flags == COMPRESS_ZLIB) {
1790 errx(1,"This restore version doesn't support zlib decompression");
1792 cresult = uncompress(comprbuf, &worklen,
1793 tpbin->buf, blocklen);
1799 reason = "not enough memory";
1802 reason = "buffer too small";
1805 reason = "data error";
1810 if (cresult == Z_OK)
1814 #endif /* HAVE_ZLIB */
1816 if (tpbin->flags == COMPRESS_BZLIB) {
1818 errx(1,"This restore version doesn't support bzlib decompression");
1821 cresult = BZ2_bzBuffToBuffDecompress(
1822 comprbuf, &worklen2,
1823 tpbin->buf, blocklen, 0, 0);
1830 reason = "not enough memory";
1832 case BZ_OUTBUFF_FULL:
1833 reason = "buffer too small";
1836 case BZ_DATA_ERROR_MAGIC:
1837 case BZ_UNEXPECTED_EOF:
1838 reason = "data error";
1843 if (cresult == BZ_OK)
1847 #endif /* HAVE_BZLIB */
1851 output = tpbin->buf;
1855 numtrec = worklen / TP_BSIZE;
1856 if (worklen % TP_BSIZE != 0)
1857 reason = "length mismatch";
1861 fprintf(stderr, "%s compressed block: %d expected: %d\n",
1862 lengtherr, readsize, tpbin->length + PREFIXSIZE);
1863 fprintf(stderr, "decompression error, block %ld: %s\n",
1864 tpblksread+1, reason);
1872 * Print an error message for a read error.
1873 * This was exteracted from the original readtape().
1876 msg_read_error(char *m)
1878 switch (curfile.action) {
1880 fprintf(stderr, "%s trying to set up tape\n", m);
1883 fprintf(stderr, "%s trying to resynchronize\n", m);
1886 fprintf(stderr, "%s restoring %s\n", m, curfile.name);
1889 fprintf(stderr, "%s skipping over inode %lu\n", m,
1890 (unsigned long)curfile.ino);
1894 #endif /* HAVE_ZLIB || HAVE_BZLIB */
1897 * Read the first block and get the blocksize from it. Test
1898 * for a compressed dump tape/file. setup() will make the final
1899 * determination by checking the compressed flag if gethead()
1900 * finds a valid header. The test here is necessary to offset the buffer
1901 * by the size of the compressed prefix. zflag is set here so that
1902 * readtape_set can set the correct function pointer for readtape().
1903 * Note that the first block of each tape/file is not compressed
1904 * and does not have a prefix.
1907 findtapeblksize(void)
1911 struct tapebuf *tpb = (struct tapebuf *) tapebuf;
1912 struct s_spcl *spclpt = (struct s_spcl *) tapebuf;
1914 for (i = 0; i < ntrec; i++)
1915 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1919 * For a pipe or file, read in the first record. For a tape, read
1922 len = magtapein ? ntrec * TP_BSIZE : TP_BSIZE;
1924 if (read_a_block(mt, tapebuf, len, &i) <= 0)
1925 errx(1, "Tape read error on first record");
1928 * If the input is from a file or a pipe, we read TP_BSIZE
1929 * bytes looking for a dump header. If the dump is compressed
1930 * we need to read in the rest of the block, as determined
1931 * by c_ntrec in the dump header. The first block of the
1932 * dump is not compressed and does not have a prefix.
1935 if (spclpt->c_type == TS_TAPE
1936 && spclpt->c_flags & DR_COMPRESSED) {
1937 /* It's a compressed dump file, read in the */
1938 /* rest of the block based on spclpt->c_ntrec. */
1939 if (spclpt->c_ntrec > ntrec)
1940 errx(1, "Tape blocksize is too large, use "
1941 "\'-b %d\' ", spclpt->c_ntrec);
1942 ntrec = spclpt->c_ntrec;
1943 len = (ntrec - 1) * TP_BSIZE;
1947 /* read in the rest of the block based on bufsize */
1948 len = bufsize - TP_BSIZE;
1950 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) < 0
1951 || (i != (long)len && i % TP_BSIZE != 0))
1952 errx(1,"Error reading dump file header");
1955 Vprintf(stdout, "Input block size is %ld\n", ntrec);
1957 } /* if (!magtapein) */
1960 * If the input is a tape, we tried to read ntrec * TP_BSIZE bytes.
1961 * If the value of ntrec is too large, we read less than
1962 * what we asked for; adjust the value of ntrec and test for
1963 * a compressed dump tape.
1966 if (i % TP_BSIZE != 0) {
1967 /* may be old format compressed dump tape with a prefix */
1968 spclpt = (struct s_spcl *) tpb->buf;
1969 if (i % TP_BSIZE == PREFIXSIZE
1970 && tpb->compressed == 0
1971 && spclpt->c_type == TS_TAPE
1972 && spclpt->c_flags & DR_COMPRESSED) {
1975 if (tpb->length > bufsize)
1976 errx(1, "Tape blocksize is too large, use "
1977 "\'-b %d\' ", tpb->length / TP_BSIZE);
1980 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
1983 ntrec = i / TP_BSIZE;
1984 if (spclpt->c_type == TS_TAPE) {
1985 if (spclpt->c_flags & DR_COMPRESSED)
1987 if (spclpt->c_ntrec > ntrec)
1988 errx(1, "Tape blocksize is too large, use "
1989 "\'-b %d\' ", spclpt->c_ntrec);
1992 Vprintf(stdout, "Tape block size is %ld\n", ntrec);
1996 * Read a block of data handling all of the messy details.
1998 static int read_a_block(int fd, char *buf, size_t len, long *lengthread)
2006 i = rmtread(buf, size);
2009 i = read(fd, buf, size);
2012 break; /* EOD or error */
2015 break; /* block at a time for mt */
2018 *lengthread = len - size;
2037 setmagtapein(void) {
2038 struct mtget mt_stat;
2039 static int done = 0;
2044 /* need to know if input is really from a tape */
2050 magtapein = ioctl(mt, MTIOCGET, (char *)&mt_stat) == 0;
2053 Vprintf(stdout,"Input is from %s\n",
2054 magtapein ? "tape" :
2055 Vflag ? "multi-volume (no tape)" : "file/pipe");
2059 * Read the next block from the tape.
2060 * Check to see if it is one of several vintage headers.
2061 * If it is an old style header, convert it to a new style header.
2062 * If it is not any valid header, return an error.
2065 gethead(struct s_spcl *buf)
2073 char dummy[TP_BSIZE];
2080 u_int16_t c_inumber;
2085 u_int16_t odi_nlink;
2101 readtape((char *)buf);
2102 if (buf->c_magic != NFS_MAGIC) {
2103 if (swabi(buf->c_magic) != NFS_MAGIC)
2106 Vprintf(stdout, "Note: Doing Byte swapping\n");
2110 if (checksum((int *)buf) == FAIL)
2113 swabst((u_char *)"8i4s31i528bi192b2i", (u_char *)buf);
2116 readtape((char *)(&u_ospcl.s_ospcl));
2117 memset((char *)buf, 0, (long)TP_BSIZE);
2118 buf->c_type = u_ospcl.s_ospcl.c_type;
2119 buf->c_date = u_ospcl.s_ospcl.c_date;
2120 buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
2121 buf->c_volume = u_ospcl.s_ospcl.c_volume;
2122 buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
2123 buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
2124 buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
2125 buf->c_magic = u_ospcl.s_ospcl.c_magic;
2126 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
2127 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
2128 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
2129 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
2130 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
2131 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
2132 #if defined(__linux__) || defined(sunos)
2133 buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime;
2134 buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2135 buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2136 #else /* __linux__ || sunos */
2137 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
2138 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2139 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2140 #endif /* __linux__ || sunos */
2141 buf->c_count = u_ospcl.s_ospcl.c_count;
2142 memmove(buf->c_addr, u_ospcl.s_ospcl.c_fill, (long)256);
2143 if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC ||
2144 checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
2146 buf->c_magic = NFS_MAGIC;
2149 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
2150 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
2151 qcvt.qval = buf->c_dinode.di_size;
2152 if (qcvt.val[0] || qcvt.val[1]) {
2153 Vprintf(stdout, "Note: Doing Quad swapping\n");
2158 qcvt.qval = buf->c_dinode.di_size;
2160 qcvt.val[1] = qcvt.val[0];
2162 buf->c_dinode.di_size = qcvt.qval;
2166 switch (buf->c_type) {
2171 * Have to patch up missing information in bit map headers
2174 buf->c_dinode.di_size = buf->c_count * TP_BSIZE;
2175 if (buf->c_count > TP_NINDIR)
2178 for (i = 0; i < buf->c_count; i++)
2183 if ((buf->c_flags & DR_NEWINODEFMT) == 0)
2188 if (buf->c_flags & DR_INODEINFO) {
2189 memcpy(volinfo, buf->c_inos, TP_NINOS * sizeof(dump_ino_t));
2191 swabst((u_char *)"128i", (u_char *)volinfo);
2200 panic("gethead: unknown inode type %d\n", buf->c_type);
2204 * If we are restoring a filesystem with old format inodes,
2205 * copy the uid/gid to the new location.
2208 buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
2209 buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
2217 * Check that a header is where it belongs and predict the next header
2220 accthdr(struct s_spcl *header)
2222 static dump_ino_t previno = 0x7fffffff;
2223 static int prevtype;
2224 static long predict;
2227 if (header->c_type == TS_TAPE) {
2228 fprintf(stderr, "Volume header (%s inode format) ",
2229 oldinofmt ? "old" : "new");
2230 if (header->c_firstrec)
2231 fprintf(stderr, "begins with record %d",
2232 header->c_firstrec);
2233 fprintf(stderr, "\n");
2234 previno = 0x7fffffff;
2237 if (previno == 0x7fffffff)
2241 fprintf(stderr, "Dumped inodes map header");
2244 fprintf(stderr, "Used inodes map header");
2247 fprintf(stderr, "File header, ino %lu", (unsigned long)previno);
2250 fprintf(stderr, "File continuation header, ino %ld", (long)previno);
2253 fprintf(stderr, "End of tape header");
2256 if (predict != blksread - 1)
2257 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
2258 predict, blksread - 1);
2259 fprintf(stderr, "\n");
2262 if (header->c_type != TS_END)
2263 for (i = 0; i < header->c_count; i++)
2264 if (readmapflag || header->c_addr[i] != 0)
2268 prevtype = header->c_type;
2269 previno = header->c_inumber;
2273 * Find an inode header.
2274 * Complain if had to skip, and complain is set.
2277 findinode(struct s_spcl *header)
2279 static long skipcnt = 0;
2283 curfile.name = "<name unknown>";
2284 curfile.action = UNKNOWN;
2288 if (header->c_magic != NFS_MAGIC) {
2290 while (gethead(header) == FAIL ||
2291 header->c_date != dumpdate)
2294 switch (header->c_type) {
2298 * Skip up to the beginning of the next record
2300 for (i = 0; i < header->c_count; i++)
2301 if (header->c_addr[i])
2303 while (gethead(header) == FAIL ||
2304 header->c_date != dumpdate)
2309 curfile.dip = &header->c_dinode;
2310 curfile.ino = header->c_inumber;
2314 curfile.ino = maxino;
2318 curfile.name = "<file removal list>";
2322 curfile.name = "<file dump list>";
2326 panic("unexpected tape header\n");
2330 panic("unknown tape header type %d\n", spcl.c_type);
2334 } while (header->c_type == TS_ADDR);
2339 fprintf(stderr, "resync restore, skipped %ld blocks\n",
2349 j = sizeof(union u_spcl) / sizeof(int);
2356 /* What happens if we want to read restore tapes
2357 for a 16bit int machine??? */
2363 if (i != CHECKSUM) {
2364 fprintf(stderr, "Checksum error %o, inode %lu file %s\n", i,
2365 (unsigned long)curfile.ino, curfile.name);
2375 #include <varargs.h>
2380 msg(const char *fmt, ...)
2393 (void)vfprintf(stderr, fmt, ap);
2396 #endif /* RRESTORE */
2399 swab16(u_char *sp, int n)
2404 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
2411 swab32(u_char *sp, int n)
2416 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
2417 c = sp[1]; sp[1] = sp[2]; sp[2] = c;
2424 swab64(u_char *sp, int n)
2429 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
2430 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
2431 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
2432 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
2439 swabst(u_char *cp, u_char *sp)
2445 case '0': case '1': case '2': case '3': case '4':
2446 case '5': case '6': case '7': case '8': case '9':
2447 n = (n * 10) + (*cp++ - '0');
2450 case 's': case 'w': case 'h':
2468 default: /* Any other character, like 'b' counts as byte. */
2482 swabst((u_char *)"i", (u_char *)&x);
2490 swabst((u_char *)"l", (u_char *)&x);
2497 * get the current position of the tape
2500 GetTapePos(long long *pos)
2506 *pos = (long long) rmtseek(0, SEEK_CUR);
2515 err = (ioctl(mt, MTIOCPOS, &mtpos) < 0);
2516 *pos = (long long)mtpos;
2519 *pos = LSEEK(mt, 0, SEEK_CUR);
2525 fprintf(stdout, "[%ld] error: %d (getting tapepos: %lld)\n",
2526 (unsigned long)getpid(), err, *pos);
2532 typedef struct mt_pos {
2535 } MTPosRec, *MTPosPtr;
2538 * go to specified position on tape
2541 GotoTapePos(long long pos)
2547 err = (rmtseek((long)pos, SEEK_SET) < 0);
2554 buf.mt_count = (int) pos;
2555 err = (ioctl(mt, MTIOCTOP, &buf) < 0);
2558 pos = LSEEK(mt, pos, SEEK_SET);
2564 fprintf(stdout, "[%ld] error: %d (setting tapepos: %lld)\n",
2565 (unsigned long)getpid(), err, pos);
2572 * read next data from tape to re-sync
2575 ReReadFromTape(void)
2579 if (gethead(&spcl) == FAIL) {
2581 fprintf(stdout, "DEBUG 1 gethead failed\n");
2589 ReReadInodeFromTape(dump_ino_t theino)
2598 } while (!(spcl.c_inumber == theino && spcl.c_type == TS_INODE && spcl.c_date == dumpdate) && (cntloop < 32));
2600 fprintf(stderr, "%ld reads\n", cntloop);
2601 if (cntloop == 32) {
2602 fprintf(stderr, "DEBUG: bufsize %d\n", bufsize);
2603 fprintf(stderr, "DEBUG: ntrec %ld\n", ntrec);
2604 fprintf(stderr, "DEBUG: %ld reads\n", cntloop);
2610 #endif /* USE_QFA */
2613 RequestVol(long tnum)