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 1.73 2003/03/30 15:40:40 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 */
89 #include "pathnames.h"
94 static long fssize = MAXBSIZE;
97 static int magtapein = 0; /* input is from magtape */
98 static char magtape[MAXPATHLEN];
99 static char magtapeprefix[MAXPATHLEN];
102 static char *tapebuf; /* input buffer for read */
103 static int bufsize; /* buffer size without prefix */
104 static char *tbufptr = NULL; /* active tape buffer */
105 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
106 static char *comprbuf; /* uncompress work buf */
107 static size_t comprlen; /* size including prefix */
109 static union u_spcl endoftapemark;
110 static long blksread; /* blocks read since last header */
111 static long tpblksread = 0; /* TP_BSIZE blocks read */
112 static long tapesread;
113 static sigjmp_buf restart;
114 static int gettingfile = 0; /* restart has a valid frame */
119 static char lnkbuf[MAXPATHLEN + 1];
122 int oldinofmt; /* old inode format conversion required */
123 int Bcvt; /* Swap Bytes (for CCI or sun) */
124 static int Qcvt; /* Swap quads (for sun) */
126 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
128 static void accthdr __P((struct s_spcl *));
129 static int checksum __P((int *));
130 static void findinode __P((struct s_spcl *));
131 static void findtapeblksize __P((void));
132 static int gethead __P((struct s_spcl *));
133 static int converthead __P((struct s_spcl *));
134 static void converttapebuf __P((struct tapebuf *));
135 static void readtape __P((char *));
136 static void setdumpnum __P((void));
137 static u_int swabi __P((u_int));
139 static u_long swabl __P((u_long));
141 static u_char *swab64 __P((u_char *, int));
142 static u_char *swab32 __P((u_char *, int));
143 static u_char *swab16 __P((u_char *, int));
144 static void terminateinput __P((void));
145 static void xtrfile __P((char *, size_t));
146 static void xtrlnkfile __P((char *, size_t));
147 static void xtrlnkskip __P((char *, size_t));
148 static void xtrmap __P((char *, size_t));
149 static void xtrmapskip __P((char *, size_t));
150 static void xtrskip __P((char *, size_t));
151 static void setmagtapein __P((void));
153 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
154 static void newcomprbuf __P((int));
155 static void (*readtape_func) __P((char *));
156 static void readtape_set __P((char *));
157 static void readtape_uncompr __P((char *));
158 static void readtape_comprfile __P((char *));
159 static void readtape_comprtape __P((char *));
160 static char *decompress_tapebuf __P((struct tapebuf *, int));
161 static void msg_read_error __P((char *));
163 static int read_a_block __P((int, char *, size_t, long *));
164 #define PREFIXSIZE sizeof(struct tapebuf)
166 #define COMPARE_ONTHEFLY 1
169 static int ifile; /* input file for compare */
170 static int cmperror; /* compare error */
171 static void xtrcmpfile __P((char *, size_t));
172 static void xtrcmpskip __P((char *, size_t));
175 static int readmapflag;
176 static int readingmaps; /* set to 1 while reading the maps */
179 * Set up an input source. This is called from main.c before setup() is.
182 setinput(char *source)
188 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
192 if (strchr(source, ':')) {
194 source = strchr(host, ':');
196 if (rmthost(host) == 0)
200 if (strcmp(source, "-") == 0) {
202 * Since input is coming from a pipe we must establish
203 * our own connection to the terminal.
205 terminal = fopen(_PATH_TTY, "r");
206 if (terminal == NULL) {
207 warn("cannot open %s", _PATH_TTY);
208 terminal = fopen(_PATH_DEVNULL, "r");
209 if (terminal == NULL)
210 err(1, "cannot open %s", _PATH_DEVNULL);
214 setuid(getuid()); /* no longer need or want root privileges */
216 strncpy(magtapeprefix, source, MAXPATHLEN);
217 magtapeprefix[MAXPATHLEN-1] = '\0';
218 snprintf(magtape, MAXPATHLEN, "%s%03d", source, 1);
221 strncpy(magtape, source, MAXPATHLEN);
222 magtape[MAXPATHLEN - 1] = '\0';
226 newtapebuf(long size)
228 static int tapebufsize = -1;
231 bufsize = ntrec * TP_BSIZE;
232 if (size <= tapebufsize)
236 tapebuf = malloc(size * TP_BSIZE + sizeof(struct tapebuf));
238 errx(1, "Cannot allocate space for tape buffer");
242 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
244 newcomprbuf(int size)
246 size_t buf_size = (size+1) * TP_BSIZE + sizeof(struct tapebuf);
247 if (buf_size <= comprlen)
250 if (comprbuf != NULL)
252 comprbuf = malloc(comprlen);
253 if (comprbuf == NULL)
254 errx(1, "Cannot allocate space for decompress buffer");
256 #endif /* HAVE_ZLIB || HAVE_BZLIB */
259 * Verify that the tape drive can be accessed and
260 * that it actually is a dump tape.
265 int i, j, *ip, bot_code;
269 Vprintf(stdout, "Verify tape and initialize maps\n");
270 if (Afile == NULL && bot_script) {
271 msg("Launching %s\n", bot_script);
272 bot_code = system_command(bot_script, magtape, 1);
273 if (bot_code != 0 && bot_code != 1) {
274 msg("Restore aborted by the beginning of tape script\n");
286 mt = rmtopen(temptape, O_RDONLY);
292 mt = OPEN(temptape, O_RDONLY, 0);
294 err(1, "%s", temptape);
300 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
301 readtape_func = readtape_set;
305 if (gethead(&spcl) == FAIL) {
306 blkcnt--; /* push back this block */
310 if (gethead(&spcl) == FAIL)
311 errx(1, "Tape is not a dump tape");
312 fprintf(stderr, "Converting to new file system format.\n");
316 fprintf(stderr, "Dump tape is compressed.\n");
317 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB)
318 errx(1,"This restore version doesn't support decompression");
319 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
322 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC;
323 endoftapemark.s_spcl.c_type = TS_END;
324 ip = (int *)&endoftapemark;
325 j = sizeof(union u_spcl) / sizeof(int);
330 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
332 if (vflag || command == 't' || command == 'C')
335 if (tapeposflag && (unsigned long)spcl.c_date != qfadumpdate)
336 errx(1, "different QFA/dumpdates detected\n");
338 if (filesys[0] == '\0') {
340 strncpy(filesys, spcl.c_filesys, NAMELEN);
341 filesys[NAMELEN - 1] = '\0';
342 dirptr = strstr(filesys, " (dir");
346 dumptime = spcl.c_ddate;
347 dumpdate = spcl.c_date;
348 if (STAT(".", &stbuf) < 0)
349 err(1, "cannot stat .");
350 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
352 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
353 fssize = stbuf.st_blksize;
354 if (((fssize - 1) & fssize) != 0)
355 errx(1, "bad block size %ld", fssize);
356 if (spcl.c_volume != 1)
357 errx(1, "Tape is not volume 1 of the dump");
358 if (gethead(&spcl) == FAIL) {
359 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
360 panic("no header after volume mark!\n");
364 if (spcl.c_type != TS_CLRI)
365 errx(1, "Cannot find file removal list");
366 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
367 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
369 errx(1, "no memory for active inode map");
371 curfile.action = USING;
372 getfile(xtrmap, xtrmapskip);
373 while (spcl.c_type == TS_ADDR) {
374 /* Recompute maxino and the map */
375 dump_ino_t oldmaxino = maxino;
376 maxino += (spcl.c_count * TP_BSIZE * NBBY) + 1;
377 resizemaps(oldmaxino, maxino);
379 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
380 getfile(xtrmap, xtrmapskip);
382 Dprintf(stdout, "maxino = %lu\n", (unsigned long)maxino);
383 if (spcl.c_type != TS_BITS)
384 errx(1, "Cannot find file dump list");
385 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
386 if (map == (char *)NULL)
387 errx(1, "no memory for file dump list");
389 curfile.action = USING;
390 getfile(xtrmap, xtrmapskip);
391 while (spcl.c_type == TS_ADDR) {
392 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
393 getfile(xtrmap, xtrmapskip);
396 * If there may be whiteout entries on the tape, pretend that the
397 * whiteout inode exists, so that the whiteout entries can be
401 SETINO(WINO, dumpmap);
407 * Prompt user to load a new dump volume.
408 * "Nextvol" is the next suggested volume to use.
409 * This suggested volume is enforced when doing full
410 * or incremental restores, but can be overridden by
411 * the user when only extracting a subset of the files.
416 long newvol = 0, wantnext = 0, i;
417 long saved_blksread = 0, saved_tpblksread = 0;
418 union u_spcl tmpspcl;
419 # define tmpbuf tmpspcl.s_spcl
421 int haderror = 0, bot_code = 1;
431 panic("Changing volumes on pipe input?\n");
436 saved_blksread = blksread;
437 saved_tpblksread = tpblksread;
438 #if defined(USE_QFA) && defined(sunos)
439 if (createtapeposflag || tapeposflag)
444 exit(1); /* pipes do not get a second chance */
445 if (aflag || curfile.action != SKIP) {
452 while (newvol <= 0) {
453 if (tapesread == 0) {
454 fprintf(stderr, "%s%s%s%s%s",
455 "You have not read any volumes yet.\n",
456 "Unless you know which volume your",
457 " file(s) are on you should start\n",
458 "with the last volume and work",
459 " towards the first.\n");
461 fprintf(stderr, "You have read volumes");
463 for (i = 1; i < 32; i++)
464 if (tapesread & (1 << i)) {
465 fprintf(stderr, "%s%ld", buf, (long)i);
468 fprintf(stderr, "\n");
471 fprintf(stderr, "Specify next volume # (none if no more volumes): ");
472 (void) fflush(stderr);
473 (void) fgets(buf, TP_BSIZE, terminal);
474 } while (!feof(terminal) && buf[0] == '\n');
477 if (!strcmp(buf, "none\n")) {
484 "Volume numbers are positive numerics\n");
487 if (newvol == volno) {
488 tapesread |= 1 << volno;
489 #if defined(USE_QFA) && defined(sunos)
490 if (createtapeposflag || tapeposflag) {
491 if (OpenSMTCmt(magtape) < 0) {
503 * if using an archive file, reset its name so readtape()
504 * could properly use remote access.
509 snprintf(magtape, MAXPATHLEN, "%s%03ld", magtapeprefix, newvol);
510 magtape[MAXPATHLEN - 1] = '\0';
512 if (bot_script && !haderror) {
513 msg("Launching %s\n", bot_script);
514 bot_code = system_command(bot_script, magtape, newvol);
515 if (bot_code != 0 && bot_code != 1) {
516 msg("Restore aborted by the beginning of tape script\n");
520 if (haderror || (bot_code && !Mflag)) {
522 fprintf(stderr, "Mount volume %ld\n", (long)newvol);
523 fprintf(stderr, "Enter ``none'' if there are no more volumes\n");
524 fprintf(stderr, "otherwise enter volume name (default: %s) ", magtape);
525 (void) fflush(stderr);
526 (void) fgets(buf, TP_BSIZE, terminal);
529 if (!strcmp(buf, "none\n")) {
533 if (buf[0] != '\n') {
535 (void) strncpy(magtape, buf, sizeof(magtape));
536 magtape[sizeof(magtape) - 1] = '\0';
537 if ((pos = strchr(magtape, '\n')))
538 magtape[pos - magtape] = '\0';
543 mt = rmtopen(magtape, O_RDONLY);
546 mt = OPEN(magtape, O_RDONLY, 0);
549 fprintf(stderr, "Cannot open %s\n", magtape);
556 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
557 readtape_func = readtape_set;
563 if (gethead(&tmpbuf) == FAIL) {
564 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
565 fprintf(stderr, "tape is not dump tape\n");
568 blksread = saved_blksread;
569 tpblksread = saved_tpblksread;
572 if (tmpbuf.c_volume != volno) {
573 fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume);
576 blksread = saved_blksread;
577 tpblksread = saved_tpblksread;
580 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
581 fprintf(stderr, "Wrong dump date\n\tgot: %s",
582 ctime4(&tmpbuf.c_date));
583 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
586 blksread = saved_blksread;
587 tpblksread = saved_tpblksread;
590 tapesread |= 1 << volno;
592 * If continuing from the previous volume, skip over any
593 * blocks read already at the end of the previous volume.
595 * If coming to this volume at random, skip to the beginning
596 * of the next record.
599 fprintf(stderr, "Dump tape is compressed.\n");
600 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB)
601 errx(1,"This restore version doesn't support decompression");
602 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
604 Dprintf(stdout, "read %ld recs, tape starts with %ld\n",
605 tpblksread - 1, (long)tmpbuf.c_firstrec);
606 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
608 tpblksread = tmpbuf.c_firstrec + 1;
609 for (i = tmpbuf.c_count; i > 0; i--)
611 } else if (tmpbuf.c_firstrec > 0 &&
612 tmpbuf.c_firstrec < tpblksread - 1) {
614 * -1 since we've read the volume header
616 i = tpblksread - tmpbuf.c_firstrec - 1;
617 Dprintf(stderr, "Skipping %ld duplicate record%s.\n",
618 (long)i, i > 1 ? "s" : "");
623 if (curfile.action == USING) {
625 panic("active file into volume 1\n");
629 * Skip up to the beginning of the next record
631 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
632 for (i = tmpbuf.c_count; i > 0; i--)
634 (void) gethead(&spcl);
638 siglongjmp(restart, 1);
643 * Handle unexpected EOF.
649 if (gettingfile && curfile.action == USING) {
650 printf("Warning: %s %s\n",
651 "End-of-input encountered while extracting", curfile.name);
653 curfile.name = "<name unknown>";
654 curfile.action = UNKNOWN;
656 curfile.ino = maxino;
659 siglongjmp(restart, 1);
664 * handle multiple dumps per tape by skipping forward to the
672 if (dumpnum == 1 || volno != 1)
675 errx(1, "Cannot have multiple dumps on pipe input");
677 tcom.mt_count = dumpnum - 1;
680 rmtioctl(MTFSF, dumpnum - 1);
683 if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0)
690 fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date));
691 fprintf(stdout, "Dumped from: %s",
692 (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate));
693 if (spcl.c_host[0] == '\0')
695 fprintf(stdout, "Level %d dump of %s on %s:%s\n",
696 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
697 fprintf(stdout, "Label: %s\n", spcl.c_label);
705 if (volinfo[1] == ROOTINO) {
706 printf("Starting inode numbers by volume:\n");
707 for (i = 1; i < (int)TP_NINOS && volinfo[i] != 0; ++i)
708 printf("\tVolume %d: %lu\n", i, (unsigned long)volinfo[i]);
714 time_t tv_sec; /* seconds */
715 suseconds_t tv_usec; /* and microseconds */
720 extractfile(struct entry *ep, int doremove)
724 struct timeval timep[2];
725 char *name = myname(ep);
727 /* If removal is requested (-r mode) do remove it unless
728 * we are extracting a metadata only inode */
729 if (spcl.c_flags & DR_METAONLY) {
730 Vprintf(stdout, "file %s is metadata only\n", name);
735 ep->e_flags &= ~REMOVED;
740 curfile.action = USING;
741 #if defined(__linux__) || defined(sunos)
742 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
743 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
744 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
745 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
746 #else /* __linux__ || sunos */
747 timep[0].tv_sec = curfile.dip->di_atime;
748 timep[0].tv_usec = curfile.dip->di_atimensec / 1000;
749 timep[1].tv_sec = curfile.dip->di_mtime;
750 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000;
751 #endif /* __linux__ */
752 mode = curfile.dip->di_mode;
753 flags = curfile.dip->di_flags;
754 switch (mode & IFMT) {
757 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
762 Vprintf(stdout, "skipped socket %s\n", name);
768 if (ep == NULL || ep->e_flags & EXTRACT)
769 panic("unextracted directory %s\n", name);
773 Vprintf(stdout, "extract file %s\n", name);
774 return (genliteraldir(name, curfile.ino));
779 uid_t luid = curfile.dip->di_uid;
780 gid_t lgid = curfile.dip->di_gid;
782 if (! (spcl.c_flags & DR_METAONLY)) {
785 getfile(xtrlnkfile, xtrlnkskip);
788 "%s: zero length symbolic link (ignored)\n", name);
791 if (linkit(lnkbuf, name, SYMLINK) == FAIL)
798 (void) lchown(name, luid, lgid);
804 Vprintf(stdout, "extract fifo %s\n", name);
809 if (! (spcl.c_flags & DR_METAONLY)) {
812 if (mkfifo(name, mode) < 0) {
813 warn("%s: cannot create fifo", name);
818 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
819 (void) chmod(name, mode);
822 (void) fsetflags(name, flags);
824 (void) chflags(name, flags);
832 Vprintf(stdout, "extract special file %s\n", name);
837 if (! (spcl.c_flags & DR_METAONLY)) {
840 if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) {
841 warn("%s: cannot create special file", name);
846 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
847 (void) chmod(name, mode);
851 warn("%s: fsetflags called on a special file", name);
852 (void) fsetflags(name, flags);
855 (void) chflags(name, flags);
863 uid_t luid = curfile.dip->di_uid;
864 gid_t lgid = curfile.dip->di_gid;
866 Vprintf(stdout, "extract file %s\n", name);
871 if (! (spcl.c_flags & DR_METAONLY)) {
874 if ((ofile = OPEN(name, O_WRONLY | O_CREAT | O_TRUNC,
876 warn("%s: cannot create file", name);
880 getfile(xtrfile, xtrskip);
885 (void) chown(name, luid, lgid);
886 (void) chmod(name, mode);
889 (void) fsetflags(name, flags);
891 (void) chflags(name, flags);
901 * skip over bit maps on the tape
907 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
912 * skip over a file on the tape
918 curfile.action = SKIP;
919 getfile(xtrnull, xtrnull);
923 * Extract a file from the tape.
924 * When an allocated block is found it is passed to the fill function;
925 * when an unallocated block (hole) is found, a zeroed buffer is passed
926 * to the skip function.
929 getfile(void (*fill) __P((char *, size_t)), void (*skip) __P((char *, size_t)))
932 volatile int curblk = 0;
933 volatile quad_t size = spcl.c_dinode.di_size;
934 volatile int last_write_was_hole = 0;
935 quad_t origsize = size;
936 static char clearedbuf[MAXBSIZE];
937 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
940 if (spcl.c_type == TS_END)
941 panic("ran off end of tape\n");
942 if (spcl.c_magic != NFS_MAGIC)
943 panic("not at beginning of a file\n");
944 if (!gettingfile && setjmp(restart) != 0)
948 for (i = 0; i < spcl.c_count; i++) {
949 if (readmapflag || spcl.c_addr[i]) {
950 readtape(&buf[curblk++][0]);
951 if (curblk == fssize / TP_BSIZE) {
952 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
953 fssize : (curblk - 1) * TP_BSIZE + size));
955 last_write_was_hole = 0;
959 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
961 (curblk - 1) * TP_BSIZE + size));
964 (*skip)(clearedbuf, (long)(size > TP_BSIZE ?
966 last_write_was_hole = 1;
968 if ((size -= TP_BSIZE) <= 0) {
969 for (i++; i < spcl.c_count; i++)
970 if (readmapflag || spcl.c_addr[i])
975 if (gethead(&spcl) == GOOD && size > 0) {
976 if (spcl.c_type == TS_ADDR)
979 "Missing address (header) block for %s at %ld blocks\n",
980 curfile.name, (long)blksread);
983 (*fill)((char *)buf, (size_t)((curblk * TP_BSIZE) + size));
984 last_write_was_hole = 0;
987 fprintf(stderr, "Missing blocks at the end of %s, assuming hole\n", curfile.name);
989 size_t skp = size > TP_BSIZE ? TP_BSIZE : size;
990 (*skip)(clearedbuf, skp);
993 last_write_was_hole = 1;
995 if (last_write_was_hole) {
996 FTRUNCATE(ofile, origsize);
1004 * Write out the next block of a file.
1007 xtrfile(char *buf, size_t size)
1012 if (write(ofile, buf, (int) size) == -1)
1013 err(1, "write error extracting inode %lu, name %s\nwrite",
1014 (unsigned long)curfile.ino, curfile.name);
1018 * Skip over a hole in a file.
1022 xtrskip(UNUSED(char *buf), size_t size)
1025 if (LSEEK(ofile, (OFF_T)size, SEEK_CUR) == -1)
1026 err(1, "seek error extracting inode %lu, name %s\nlseek",
1027 (unsigned long)curfile.ino, curfile.name);
1031 * Collect the next block of a symbolic link.
1034 xtrlnkfile(char *buf, size_t size)
1038 if (pathlen > MAXPATHLEN)
1039 errx(1, "symbolic link name: %s->%s%s; too long %d",
1040 curfile.name, lnkbuf, buf, pathlen);
1041 (void) strcat(lnkbuf, buf);
1045 * Skip over a hole in a symbolic link (should never happen).
1049 xtrlnkskip(UNUSED(char *buf), UNUSED(size_t size))
1052 errx(1, "unallocated block in symbolic link %s", curfile.name);
1056 * Collect the next block of a bit map.
1059 xtrmap(char *buf, size_t size)
1062 memmove(map, buf, size);
1067 * Skip over a hole in a bit map (should never happen).
1071 xtrmapskip(UNUSED(char *buf), size_t size)
1074 panic("hole in map\n");
1079 * Noop, when an extraction function is not needed.
1083 xtrnull(UNUSED(char *buf), UNUSED(size_t size))
1089 #if COMPARE_ONTHEFLY
1091 * Compare the next block of a file.
1094 xtrcmpfile(char *buf, size_t size)
1096 static char cmpbuf[MAXBSIZE];
1101 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1102 fprintf(stderr, "%s: size has changed.\n",
1108 if (memcmp(buf, cmpbuf, size) != 0) {
1109 fprintf(stderr, "%s: tape and disk copies are different\n",
1117 * Skip over a hole in a file.
1120 xtrcmpskip(UNUSED(char *buf), size_t size)
1122 static char cmpbuf[MAXBSIZE];
1128 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1129 fprintf(stderr, "%s: size has changed.\n",
1135 for (i = 0; i < (int)size; ++i)
1136 if (cmpbuf[i] != '\0') {
1137 fprintf(stderr, "%s: tape and disk copies are different\n",
1143 #endif /* COMPARE_ONTHEFLY */
1145 #if !COMPARE_ONTHEFLY
1147 do_cmpfiles(int fd_tape, int fd_disk, long size)
1149 static char buf_tape[BUFSIZ];
1150 static char buf_disk[BUFSIZ];
1155 if ((n_tape = read(fd_tape, buf_tape, sizeof(buf_tape))) < 1) {
1156 close(fd_tape), close(fd_disk);
1157 panic("do_cmpfiles: unexpected EOF[1]");
1159 if ((n_disk = read(fd_disk, buf_disk, sizeof(buf_tape))) < 1) {
1160 close(fd_tape), close(fd_disk);
1161 panic("do_cmpfiles: unexpected EOF[2]");
1163 if (n_tape != n_disk) {
1164 close(fd_tape), close(fd_disk);
1165 panic("do_cmpfiles: sizes different!");
1167 if (memcmp(buf_tape, buf_disk, (size_t)n_tape) != 0) return (1);
1173 /* for debugging compare problems */
1174 #undef COMPARE_FAIL_KEEP_FILE
1177 #ifdef COMPARE_FAIL_KEEP_FILE
1178 /* return true if tapefile should be unlinked after compare */
1183 cmpfiles(char *tapefile, char *diskfile, struct STAT *sbuf_disk)
1185 struct STAT sbuf_tape;
1186 int fd_tape, fd_disk;
1188 if (STAT(tapefile, &sbuf_tape) != 0) {
1189 panic("Can't lstat tmp file %s: %s\n", tapefile,
1194 if (sbuf_disk->st_size != sbuf_tape.st_size) {
1196 "%s: size changed from %ld to %ld.\n",
1197 diskfile, (long)sbuf_tape.st_size, (long)sbuf_disk->st_size);
1199 #ifdef COMPARE_FAIL_KEEP_FILE
1206 if ((fd_tape = OPEN(tapefile, O_RDONLY)) < 0) {
1207 panic("Can't open %s: %s\n", tapefile, strerror(errno));
1210 if ((fd_disk = OPEN(diskfile, O_RDONLY)) < 0) {
1212 panic("Can't open %s: %s\n", diskfile, strerror(errno));
1216 if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) {
1217 fprintf(stderr, "%s: tape and disk copies are different\n",
1222 #ifdef COMPARE_FAIL_KEEP_FILE
1223 /* rename the file to live in /tmp */
1224 /* rename `tapefile' to /tmp/<basename of diskfile> */
1226 char *p = strrchr(diskfile, '/');
1227 char newname[MAXPATHLEN];
1229 panic("can't find / in %s\n", diskfile);
1231 snprintf(newname, sizeof(newname), "%s/debug/%s", tmpdir, p + 1);
1232 if (rename(tapefile, newname)) {
1233 panic("rename from %s to %s failed: %s\n",
1237 fprintf(stderr, "*** %s saved to %s\n",
1242 /* don't unlink the file (it's not there anymore */
1251 #ifdef COMPARE_FAIL_KEEP_FILE
1255 #endif /* !COMPARE_ONTHEFLY */
1257 #if !COMPARE_ONTHEFLY
1258 static char tmpfilename[MAXPATHLEN];
1262 comparefile(char *name)
1267 #if !COMPARE_ONTHEFLY
1268 static char *tmpfile = NULL;
1272 curfile.name = name;
1273 curfile.action = USING;
1274 mode = curfile.dip->di_mode;
1276 if ((mode & IFMT) == IFSOCK) {
1277 Vprintf(stdout, "skipped socket %s\n", name);
1282 if ((r = LSTAT(name, &sb)) != 0) {
1283 warn("%s: does not exist (%d)", name, r);
1289 Vprintf(stdout, "comparing %s (size: %ld, mode: 0%o)\n", name,
1290 (long)sb.st_size, mode);
1292 if (sb.st_mode != mode) {
1293 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
1294 name, mode & 07777, sb.st_mode & 07777);
1297 if (spcl.c_flags & DR_METAONLY) {
1301 switch (mode & IFMT) {
1315 char lbuf[MAXPATHLEN + 1];
1318 if (!(sb.st_mode & S_IFLNK)) {
1319 fprintf(stderr, "%s: is no longer a symbolic link\n",
1326 getfile(xtrlnkfile, xtrlnkskip);
1329 "%s: zero length symbolic link (ignored)\n",
1334 if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) {
1335 panic("readlink of %s failed: %s", name,
1340 if (strcmp(lbuf, lnkbuf) != 0) {
1342 "%s: symbolic link changed from %s to %s.\n",
1343 name, lnkbuf, lbuf);
1352 if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) {
1353 fprintf(stderr, "%s: no longer a special file\n",
1360 if (sb.st_rdev != (dev_t)curfile.dip->di_rdev) {
1362 "%s: device changed from %d,%d to %d,%d.\n",
1364 ((int)curfile.dip->di_rdev >> 8) & 0xff,
1365 (int)curfile.dip->di_rdev & 0xff,
1366 ((int)sb.st_rdev >> 8) & 0xff,
1367 (int)sb.st_rdev & 0xff);
1374 #if COMPARE_ONTHEFLY
1375 if ((ifile = OPEN(name, O_RDONLY)) < 0) {
1376 panic("Can't open %s: %s\n", name, strerror(errno));
1382 getfile(xtrcmpfile, xtrcmpskip);
1385 if (read(ifile, &c, 1) != 0) {
1386 fprintf(stderr, "%s: size has changed.\n",
1396 if (tmpfile == NULL) {
1397 /* argument to mktemp() must not be in RO space: */
1398 snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir);
1399 tmpfile = mktemp(&tmpfilename[0]);
1401 if ((STAT(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) {
1402 panic("cannot delete tmp file %s: %s\n",
1403 tmpfile, strerror(errno));
1405 if ((ofile = OPEN(tmpfile, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) {
1406 panic("cannot create file temp file %s: %s\n",
1407 name, strerror(errno));
1409 getfile(xtrfile, xtrskip);
1410 (void) close(ofile);
1411 #ifdef COMPARE_FAIL_KEEP_FILE
1412 if (cmpfiles(tmpfile, name, &sb))
1415 cmpfiles(tmpfile, name, &sb);
1418 #endif /* COMPARE_ONTHEFLY */
1424 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1425 static void (*readtape_func)(char *) = readtape_set;
1428 * Read TP_BSIZE blocks from the input.
1429 * Handle read errors, and end of media.
1430 * Decompress compressed blocks.
1435 (*readtape_func)(buf); /* call the actual processing routine */
1439 * Set function pointer for readtape() routine. zflag and magtapein must
1440 * be correctly set before the first call to readtape().
1443 readtape_set(char *buf)
1446 readtape_func = readtape_uncompr;
1450 readtape_func = readtape_comprtape;
1452 readtape_func = readtape_comprfile;
1457 #endif /* HAVE_ZLIB || HAVE_BZLIB */
1460 * This is the original readtape(), it's used for reading uncompressed input.
1461 * Read TP_BSIZE blocks from the input.
1462 * Handle read errors, and end of media.
1465 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1466 readtape_uncompr(char *buf)
1471 ssize_t rd, newvol, i;
1472 int cnt, seek_failed;
1474 if (blkcnt < numtrec) {
1475 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1481 for (i = 0; i < ntrec; i++)
1482 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1485 cnt = ntrec * TP_BSIZE;
1488 if (createtapeposflag)
1489 (void)GetTapePos(&curtapepos);
1494 i = rmtread(&tapebuf[rd], cnt);
1497 i = read(mt, &tapebuf[rd], cnt);
1500 * Check for mid-tape short read error.
1501 * If found, skip rest of buffer and start with the next.
1503 if (!pipein && numtrec < ntrec && i > 0) {
1504 Dprintf(stdout, "mid-media short read error.\n");
1508 * Handle partial block read.
1510 if (pipein && i == 0 && rd > 0)
1512 else if (i > 0 && i != ntrec * TP_BSIZE) {
1521 * Short read. Process the blocks read.
1523 if (i % TP_BSIZE != 0)
1525 "partial block read: %ld should be %ld\n",
1526 (long)i, ntrec * TP_BSIZE);
1527 numtrec = i / TP_BSIZE;
1531 * Handle read error.
1534 fprintf(stderr, "Tape read error while ");
1535 switch (curfile.action) {
1537 fprintf(stderr, "trying to set up tape\n");
1540 fprintf(stderr, "trying to resynchronize\n");
1543 fprintf(stderr, "restoring %s\n", curfile.name);
1546 fprintf(stderr, "skipping over inode %lu\n",
1547 (unsigned long)curfile.ino);
1550 if (!yflag && !reply("continue"))
1552 i = ntrec * TP_BSIZE;
1553 memset(tapebuf, 0, (size_t)i);
1556 seek_failed = (rmtseek(i, 1) < 0);
1559 seek_failed = (LSEEK(mt, i, SEEK_CUR) == (OFF_T)-1);
1562 warn("continuation failed");
1563 if (!yflag && !reply("assume end-of-tape and continue"))
1569 * Handle end of tape.
1572 Vprintf(stdout, "End-of-tape encountered\n");
1581 if (rd % TP_BSIZE != 0)
1582 panic("partial block read: %d should be %d\n",
1583 rd, ntrec * TP_BSIZE);
1585 memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE);
1588 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1593 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
1596 * Read a compressed format block from a file or pipe and uncompress it.
1597 * Attempt to handle read errors, and end of file.
1600 readtape_comprfile(char *buf)
1602 long rl, size, i, ret;
1604 struct tapebuf *tpb;
1606 if (blkcnt < numtrec) {
1607 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1612 /* need to read the next block */
1614 for (i = 0; i < ntrec; i++)
1615 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1617 tpb = (struct tapebuf *) tapebuf;
1619 /* read the block prefix */
1620 ret = read_a_block(mt, tapebuf, PREFIXSIZE, &rl);
1621 converttapebuf(tpb);
1623 if (Vflag && (ret == 0 || rl < (int)PREFIXSIZE || tpb->length == 0))
1630 if (size > bufsize) {
1631 /* something's wrong */
1632 Vprintf(stdout, "Prefix size error, max size %d, got %ld\n",
1635 tpb->length = bufsize;
1637 ret = read_a_block(mt, tpb->buf, size, &rl);
1641 tbufptr = decompress_tapebuf(tpb, rl + PREFIXSIZE);
1642 if (tbufptr == NULL) {
1643 msg_read_error("File decompression error while");
1644 if (!yflag && !reply("continue"))
1646 memset(tapebuf, 0, bufsize);
1651 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1657 /* Errors while reading from a file or pipe are catastrophic. Since
1658 * there are no block boundaries, it's impossible to bypass the
1659 * block in error and find the start of the next block.
1662 /* It's possible to have multiple input files using -M
1663 * and -f file1,file2...
1665 Vprintf(stdout, "End-of-File encountered\n");
1675 msg_read_error("Read error while");
1676 /* if (!yflag && !reply("continue")) */
1681 * Read compressed data from a tape and uncompress it.
1682 * Handle read errors, and end of media.
1683 * Since a tape consists of separate physical blocks, we try
1684 * to recover from errors by repositioning the tape to the next
1688 readtape_comprtape(char *buf)
1692 struct tapebuf *tpb;
1695 if (blkcnt < numtrec) {
1696 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1701 /* need to read the next block */
1703 for (i = 0; i < ntrec; i++)
1704 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1706 tpb = (struct tapebuf *) tapebuf;
1708 /* read the block */
1709 size = bufsize + PREFIXSIZE;
1710 ret = read_a_block(mt, tapebuf, size, &rl);
1714 converttapebuf(tpb);
1715 tbufptr = decompress_tapebuf(tpb, rl);
1716 if (tbufptr == NULL) {
1717 msg_read_error("Tape decompression error while");
1718 if (!yflag && !reply("continue"))
1720 memset(tapebuf, 0, PREFIXSIZE + bufsize);
1726 /* Handle errors: EOT switches to the next volume, other errors
1727 * attempt to position the tape to the next block.
1730 Vprintf(stdout, "End-of-tape encountered\n");
1739 msg_read_error("Tape read error while");
1740 if (!yflag && !reply("continue"))
1742 memset(tapebuf, 0, PREFIXSIZE + bufsize);
1747 rl = rmtioctl(MTFSR, 1);
1753 rl = ioctl(mt, MTIOCTOP, &tcom);
1757 warn("continuation failed");
1758 if (!yflag && !reply("assume end-of-tape and continue"))
1760 ret = 0; /* end of tape */
1766 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1772 * Decompress a struct tapebuf into a buffer. readsize is the size read
1773 * from the tape/file and is used for error messages. Returns a pointer
1774 * to the location of the uncompressed buffer or NULL on errors.
1775 * Adjust numtrec and complain for a short block.
1778 decompress_tapebuf(struct tapebuf *tpbin, int readsize)
1780 /* If zflag is on, all blocks have a struct tapebuf prefix */
1781 /* zflag gets set in setup() from the dump header */
1782 int cresult, blocklen;
1783 unsigned long worklen;
1785 unsigned int worklen2;
1787 char *output = NULL,*reason = NULL, *lengtherr = NULL;
1789 /* build a length error message */
1790 blocklen = tpbin->length;
1791 if (readsize < blocklen + (int)PREFIXSIZE)
1792 lengtherr = "short";
1794 if (readsize > blocklen + (int)PREFIXSIZE)
1799 if (tpbin->compressed) {
1800 /* uncompress whatever we read, if it fails, complain later */
1801 if (tpbin->flags == COMPRESS_ZLIB) {
1803 errx(1,"This restore version doesn't support zlib decompression");
1805 cresult = uncompress(comprbuf, &worklen,
1806 tpbin->buf, blocklen);
1812 reason = "not enough memory";
1815 reason = "buffer too small";
1818 reason = "data error";
1823 if (cresult == Z_OK)
1827 #endif /* HAVE_ZLIB */
1829 if (tpbin->flags == COMPRESS_BZLIB) {
1831 errx(1,"This restore version doesn't support bzlib decompression");
1834 cresult = BZ2_bzBuffToBuffDecompress(
1835 comprbuf, &worklen2,
1836 tpbin->buf, blocklen, 0, 0);
1843 reason = "not enough memory";
1845 case BZ_OUTBUFF_FULL:
1846 reason = "buffer too small";
1849 case BZ_DATA_ERROR_MAGIC:
1850 case BZ_UNEXPECTED_EOF:
1851 reason = "data error";
1856 if (cresult == BZ_OK)
1860 #endif /* HAVE_BZLIB */
1864 output = tpbin->buf;
1868 numtrec = worklen / TP_BSIZE;
1869 if (worklen % TP_BSIZE != 0)
1870 reason = "length mismatch";
1874 fprintf(stderr, "%s compressed block: %d expected: %d\n",
1875 lengtherr, readsize, tpbin->length + PREFIXSIZE);
1876 fprintf(stderr, "decompression error, block %ld: %s\n",
1877 tpblksread+1, reason);
1885 * Print an error message for a read error.
1886 * This was exteracted from the original readtape().
1889 msg_read_error(char *m)
1891 switch (curfile.action) {
1893 fprintf(stderr, "%s trying to set up tape\n", m);
1896 fprintf(stderr, "%s trying to resynchronize\n", m);
1899 fprintf(stderr, "%s restoring %s\n", m, curfile.name);
1902 fprintf(stderr, "%s skipping over inode %lu\n", m,
1903 (unsigned long)curfile.ino);
1907 #endif /* HAVE_ZLIB || HAVE_BZLIB */
1910 * Read the first block and get the blocksize from it. Test
1911 * for a compressed dump tape/file. setup() will make the final
1912 * determination by checking the compressed flag if gethead()
1913 * finds a valid header. The test here is necessary to offset the buffer
1914 * by the size of the compressed prefix. zflag is set here so that
1915 * readtape_set can set the correct function pointer for readtape().
1916 * Note that the first block of each tape/file is not compressed
1917 * and does not have a prefix.
1920 findtapeblksize(void)
1924 struct tapebuf *tpb = (struct tapebuf *) tapebuf;
1925 struct s_spcl spclpt;
1927 for (i = 0; i < ntrec; i++)
1928 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1932 * For a pipe or file, read in the first record. For a tape, read
1935 len = magtapein ? ntrec * TP_BSIZE : TP_BSIZE;
1937 if (read_a_block(mt, tapebuf, len, &i) <= 0)
1938 errx(1, "Tape read error on first record");
1940 memcpy(&spclpt, tapebuf, TP_BSIZE);
1941 if (converthead(&spclpt) == FAIL) {
1943 if (converthead(&spclpt) == FAIL) {
1944 /* Special case for old compressed tapes with prefix */
1945 if (magtapein && (i % TP_BSIZE != 0))
1947 errx(1, "Tape is not a dump tape");
1949 fprintf(stderr, "Converting to new file system format.\n");
1952 * If the input is from a file or a pipe, we read TP_BSIZE
1953 * bytes looking for a dump header. If the dump is compressed
1954 * we need to read in the rest of the block, as determined
1955 * by c_ntrec in the dump header. The first block of the
1956 * dump is not compressed and does not have a prefix.
1959 if (spclpt.c_type == TS_TAPE
1960 && spclpt.c_flags & DR_COMPRESSED) {
1961 /* It's a compressed dump file, read in the */
1962 /* rest of the block based on spclpt.c_ntrec. */
1963 if (spclpt.c_ntrec > ntrec)
1964 errx(1, "Tape blocksize is too large, use "
1965 "\'-b %d\' ", spclpt.c_ntrec);
1966 ntrec = spclpt.c_ntrec;
1967 len = (ntrec - 1) * TP_BSIZE;
1971 /* read in the rest of the block based on bufsize */
1972 len = bufsize - TP_BSIZE;
1974 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) < 0
1975 || (i != (long)len && i % TP_BSIZE != 0))
1976 errx(1,"Error reading dump file header");
1979 Vprintf(stdout, "Input block size is %ld\n", ntrec);
1981 } /* if (!magtapein) */
1984 * If the input is a tape, we tried to read ntrec * TP_BSIZE bytes.
1985 * If the value of ntrec is too large, we read less than
1986 * what we asked for; adjust the value of ntrec and test for
1987 * a compressed dump tape.
1989 if (i % TP_BSIZE != 0) {
1991 /* may be old format compressed dump tape with a prefix */
1992 memcpy(&spclpt, tpb->buf, TP_BSIZE);
1994 if (converthead(&spclpt) == FAIL) {
1996 if (converthead(&spclpt) == FAIL)
1997 errx(1, "Tape is not a dump tape");
1998 fprintf(stderr, "Converting to new file system format.\n");
2000 if (i % TP_BSIZE == PREFIXSIZE
2001 && tpb->compressed == 0
2002 && spclpt.c_type == TS_TAPE
2003 && spclpt.c_flags & DR_COMPRESSED) {
2006 if (tpb->length > bufsize)
2007 errx(1, "Tape blocksize is too large, use "
2008 "\'-b %d\' ", tpb->length / TP_BSIZE);
2011 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
2014 ntrec = i / TP_BSIZE;
2015 if (spclpt.c_type == TS_TAPE) {
2016 if (spclpt.c_flags & DR_COMPRESSED)
2018 if (spclpt.c_ntrec > ntrec)
2019 errx(1, "Tape blocksize is too large, use "
2020 "\'-b %d\' ", spclpt.c_ntrec);
2023 Vprintf(stdout, "Tape block size is %ld\n", ntrec);
2027 * Read a block of data handling all of the messy details.
2029 static int read_a_block(int fd, char *buf, size_t len, long *lengthread)
2037 i = rmtread(buf, size);
2040 i = read(fd, buf, size);
2043 break; /* EOD or error */
2046 break; /* block at a time for mt */
2049 *lengthread = len - size;
2068 setmagtapein(void) {
2069 struct mtget mt_stat;
2070 static int done = 0;
2075 /* need to know if input is really from a tape */
2081 magtapein = ioctl(mt, MTIOCGET, (char *)&mt_stat) == 0;
2084 Vprintf(stdout,"Input is from a %s %s\n",
2085 host ? "remote" : "local",
2086 magtapein ? "tape" :
2087 Vflag ? "multi-volume (no tape)" : "file/pipe");
2091 * Read the next block from the tape.
2092 * Check to see if it is one of several vintage headers.
2093 * If it is an old style header, convert it to a new style header.
2094 * If it is not any valid header, return an error.
2097 gethead(struct s_spcl *buf)
2099 readtape((char *)buf);
2100 return converthead(buf);
2104 converthead(struct s_spcl *buf)
2112 char dummy[TP_BSIZE];
2119 u_int16_t c_inumber;
2124 u_int16_t odi_nlink;
2140 if (buf->c_magic != NFS_MAGIC) {
2141 if (swabi(buf->c_magic) != NFS_MAGIC)
2144 Vprintf(stdout, "Note: Doing Byte swapping\n");
2148 if (checksum((int *)buf) == FAIL)
2151 swabst((u_char *)"8i4s31i528bi192b3i", (u_char *)buf);
2154 memcpy(&u_ospcl.s_ospcl, buf, TP_BSIZE);
2155 memset((char *)buf, 0, (long)TP_BSIZE);
2156 buf->c_type = u_ospcl.s_ospcl.c_type;
2157 buf->c_date = u_ospcl.s_ospcl.c_date;
2158 buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
2159 buf->c_volume = u_ospcl.s_ospcl.c_volume;
2160 buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
2161 buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
2162 buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
2163 buf->c_magic = u_ospcl.s_ospcl.c_magic;
2164 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
2165 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
2166 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
2167 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
2168 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
2169 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
2170 #if defined(__linux__) || defined(sunos)
2171 buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime;
2172 buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2173 buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2174 #else /* __linux__ || sunos */
2175 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
2176 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2177 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2178 #endif /* __linux__ || sunos */
2179 buf->c_count = u_ospcl.s_ospcl.c_count;
2180 memmove(buf->c_addr, u_ospcl.s_ospcl.c_fill, (long)256);
2181 if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC ||
2182 checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
2184 buf->c_magic = NFS_MAGIC;
2187 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
2188 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
2189 qcvt.qval = buf->c_dinode.di_size;
2190 if (qcvt.val[0] || qcvt.val[1]) {
2191 Vprintf(stdout, "Note: Doing Quad swapping\n");
2196 qcvt.qval = buf->c_dinode.di_size;
2198 qcvt.val[1] = qcvt.val[0];
2200 buf->c_dinode.di_size = qcvt.qval;
2204 switch (buf->c_type) {
2209 * Have to patch up missing information in bit map headers
2212 buf->c_dinode.di_size = buf->c_count * TP_BSIZE;
2213 if (buf->c_count > TP_NINDIR)
2216 for (i = 0; i < buf->c_count; i++)
2221 if ((buf->c_flags & DR_NEWINODEFMT) == 0)
2226 if (buf->c_flags & DR_INODEINFO) {
2227 memcpy(volinfo, buf->c_inos, TP_NINOS * sizeof(dump_ino_t));
2229 swabst((u_char *)"128i", (u_char *)volinfo);
2238 panic("gethead: unknown inode type %d\n", buf->c_type);
2242 * If we are restoring a filesystem with old format inodes,
2243 * copy the uid/gid to the new location.
2246 buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
2247 buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
2255 converttapebuf(struct tapebuf *tpb)
2259 unsigned int length:28;
2260 unsigned int flags:3;
2261 unsigned int compressed:1;
2263 swabst((u_char *)"i", (u_char *)tpb);
2264 memcpy(&tb, tpb, 4);
2265 tpb->length = tb.length;
2266 tpb->flags = tb.flags;
2267 tpb->compressed = tb.compressed;
2272 * Check that a header is where it belongs and predict the next header
2275 accthdr(struct s_spcl *header)
2277 static dump_ino_t previno = 0x7fffffff;
2278 static int prevtype;
2279 static long predict;
2282 if (header->c_type == TS_TAPE) {
2283 fprintf(stderr, "Volume header (%s inode format) ",
2284 oldinofmt ? "old" : "new");
2285 if (header->c_firstrec)
2286 fprintf(stderr, "begins with record %d",
2287 header->c_firstrec);
2288 fprintf(stderr, "\n");
2289 previno = 0x7fffffff;
2292 if (previno == 0x7fffffff)
2296 fprintf(stderr, "Dumped inodes map header");
2299 fprintf(stderr, "Used inodes map header");
2302 fprintf(stderr, "File header, ino %lu", (unsigned long)previno);
2305 fprintf(stderr, "File continuation header, ino %ld", (long)previno);
2308 fprintf(stderr, "End of tape header");
2311 if (predict != blksread - 1)
2312 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
2313 predict, blksread - 1);
2314 fprintf(stderr, "\n");
2317 if (header->c_type != TS_END)
2318 for (i = 0; i < header->c_count; i++)
2319 if (readmapflag || header->c_addr[i] != 0)
2323 prevtype = header->c_type;
2324 previno = header->c_inumber;
2328 * Find an inode header.
2329 * Complain if had to skip, and complain is set.
2332 findinode(struct s_spcl *header)
2334 static long skipcnt = 0;
2338 curfile.name = "<name unknown>";
2339 curfile.action = UNKNOWN;
2343 if (header->c_magic != NFS_MAGIC) {
2345 while (gethead(header) == FAIL ||
2346 header->c_date != dumpdate)
2349 switch (header->c_type) {
2353 * Skip up to the beginning of the next record
2355 for (i = 0; i < header->c_count; i++)
2356 if (header->c_addr[i])
2358 while (gethead(header) == FAIL ||
2359 header->c_date != dumpdate)
2364 curfile.dip = &header->c_dinode;
2365 curfile.ino = header->c_inumber;
2369 curfile.ino = maxino;
2373 curfile.name = "<file removal list>";
2377 curfile.name = "<file dump list>";
2381 panic("unexpected tape header\n");
2385 panic("unknown tape header type %d\n", spcl.c_type);
2389 } while (header->c_type == TS_ADDR);
2394 fprintf(stderr, "resync restore, skipped %ld blocks\n",
2404 j = sizeof(union u_spcl) / sizeof(int);
2411 /* What happens if we want to read restore tapes
2412 for a 16bit int machine??? */
2418 if (i != CHECKSUM) {
2419 fprintf(stderr, "Checksum error %o, inode %lu file %s\n", i,
2420 (unsigned long)curfile.ino, curfile.name);
2430 #include <varargs.h>
2435 msg(const char *fmt, ...)
2448 (void)vfprintf(stderr, fmt, ap);
2451 #endif /* RRESTORE */
2454 swab16(u_char *sp, int n)
2459 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
2466 swab32(u_char *sp, int n)
2471 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
2472 c = sp[1]; sp[1] = sp[2]; sp[2] = c;
2479 swab64(u_char *sp, int n)
2484 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
2485 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
2486 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
2487 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
2494 swabst(u_char *cp, u_char *sp)
2500 case '0': case '1': case '2': case '3': case '4':
2501 case '5': case '6': case '7': case '8': case '9':
2502 n = (n * 10) + (*cp++ - '0');
2505 case 's': case 'w': case 'h':
2523 default: /* Any other character, like 'b' counts as byte. */
2537 swabst((u_char *)"i", (u_char *)&x);
2545 swabst((u_char *)"l", (u_char *)&x);
2552 * get the current position of the tape
2555 GetTapePos(long long *pos)
2561 *pos = (long long) rmtseek(0, SEEK_CUR);
2570 err = (ioctl(mt, MTIOCPOS, &mtpos) < 0);
2571 *pos = (long long)mtpos;
2574 *pos = LSEEK(mt, 0, SEEK_CUR);
2580 fprintf(stdout, "[%ld] error: %d (getting tapepos: %lld)\n",
2581 (unsigned long)getpid(), err, *pos);
2587 typedef struct mt_pos {
2590 } MTPosRec, *MTPosPtr;
2593 * go to specified position on tape
2596 GotoTapePos(long long pos)
2602 err = (rmtseek(pos, SEEK_SET) < 0);
2609 buf.mt_count = (int) pos;
2610 err = (ioctl(mt, MTIOCTOP, &buf) < 0);
2613 pos = LSEEK(mt, pos, SEEK_SET);
2619 fprintf(stdout, "[%ld] error: %d (setting tapepos: %lld)\n",
2620 (unsigned long)getpid(), err, pos);
2627 * read next data from tape to re-sync
2630 ReReadFromTape(void)
2634 if (gethead(&spcl) == FAIL) {
2636 fprintf(stdout, "DEBUG 1 gethead failed\n");
2644 ReReadInodeFromTape(dump_ino_t theino)
2653 } while (!(spcl.c_inumber == theino && spcl.c_type == TS_INODE && spcl.c_date == dumpdate) && (cntloop < ntrec));
2655 fprintf(stderr, "%ld reads\n", cntloop);
2656 if (cntloop == ntrec) {
2657 fprintf(stderr, "DEBUG: bufsize %d\n", bufsize);
2658 fprintf(stderr, "DEBUG: ntrec %ld\n", ntrec);
2664 #endif /* USE_QFA */
2667 RequestVol(long tnum)