2 * Ported to Linux's Second Extended File System as part of the
3 * dump and restore backup suit
4 * Remy Card <card@Linux.EU.Org>, 1994-1997
5 * Stelian Pop <pop@noos.fr>, 1999-2000
6 * Stelian Pop <pop@noos.fr> - AlcĂ´ve <www.alcove.fr>, 2000
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 1.34 2001/04/12 16:03:30 stelian Exp $";
54 #include <compaterr.h>
61 #include <sys/param.h>
69 #include <linux/ext2_fs.h>
70 #include <ext2fs/ext2fs.h>
71 #include <bsdcompat.h>
73 #include <ufs/ufs/dinode.h>
74 #endif /* __linux__ */
75 #include <protocols/dumprestore.h>
79 #endif /* HAVE_ZLIB */
83 #include "pathnames.h"
88 static long fssize = MAXBSIZE;
90 static int pipein = 0;
91 static int magtapein = 0; /* input is from magtape */
92 static char magtape[MAXPATHLEN];
93 static char magtapeprefix[MAXPATHLEN];
96 static char *tapebuf; /* input buffer for read */
97 static int bufsize; /* buffer size without prefix */
98 static char *tbufptr = NULL; /* active tape buffer */
100 static char *comprbuf; /* uncompress work buf */
101 static size_t comprlen; /* size including prefix */
103 static union u_spcl endoftapemark;
104 static long blksread; /* blocks read since last header */
105 static long tpblksread = 0; /* TP_BSIZE blocks read */
106 static long tapesread;
107 static sigjmp_buf restart;
108 static int gettingfile = 0; /* restart has a valid frame */
109 static char *host = NULL;
113 static char lnkbuf[MAXPATHLEN + 1];
116 int oldinofmt; /* old inode format conversion required */
117 int Bcvt; /* Swap Bytes (for CCI or sun) */
118 static int Qcvt; /* Swap quads (for sun) */
120 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
122 static void accthdr __P((struct s_spcl *));
123 static int checksum __P((int *));
124 static void findinode __P((struct s_spcl *));
125 static void findtapeblksize __P((void));
126 static int gethead __P((struct s_spcl *));
127 static void readtape __P((char *));
128 static void setdumpnum __P((void));
129 static u_int swabi __P((u_int));
131 static u_long swabl __P((u_long));
133 static u_char *swab64 __P((u_char *, int));
134 static u_char *swab32 __P((u_char *, int));
135 static u_char *swab16 __P((u_char *, int));
136 static void terminateinput __P((void));
137 static void xtrfile __P((char *, size_t));
138 static void xtrlnkfile __P((char *, size_t));
139 static void xtrlnkskip __P((char *, size_t));
140 static void xtrmap __P((char *, size_t));
141 static void xtrmapskip __P((char *, size_t));
142 static void xtrskip __P((char *, size_t));
145 static void newcomprbuf __P((long));
146 static void readtape_set __P((char *));
147 static void readtape_uncompr __P((char *));
148 static void readtape_comprfile __P((char *));
149 static void readtape_comprtape __P((char *));
150 static char *decompress_tapebuf __P((struct tapebuf *, int));
151 static void msg_read_error __P((char *));
153 static int read_a_block __P((int, char *, size_t, long *));
154 #define PREFIXSIZE sizeof(struct tapebuf)
156 #define COMPARE_ONTHEFLY 1
159 static int ifile; /* input file for compare */
160 static int cmperror; /* compare error */
161 static void xtrcmpfile __P((char *, size_t));
162 static void xtrcmpskip __P((char *, size_t));
165 static int readmapflag;
168 * Set up an input source. This is called from main.c before setup() is.
171 setinput(char *source)
177 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
181 if (strchr(source, ':')) {
183 source = strchr(host, ':');
185 if (rmthost(host) == 0)
189 if (strcmp(source, "-") == 0) {
191 * Since input is coming from a pipe we must establish
192 * our own connection to the terminal.
194 terminal = fopen(_PATH_TTY, "r");
195 if (terminal == NULL) {
196 warn("cannot open %s", _PATH_TTY);
197 terminal = fopen(_PATH_DEVNULL, "r");
198 if (terminal == NULL)
199 err(1, "cannot open %s", _PATH_DEVNULL);
203 setuid(getuid()); /* no longer need or want root privileges */
205 strncpy(magtapeprefix, source, MAXPATHLEN);
206 magtapeprefix[MAXPATHLEN-1] = '\0';
207 snprintf(magtape, MAXPATHLEN, "%s%03d", source, 1);
210 strncpy(magtape, source, MAXPATHLEN);
211 magtape[MAXPATHLEN - 1] = '\0';
215 newtapebuf(long size)
217 static int tapebufsize = -1;
220 bufsize = ntrec * TP_BSIZE;
221 if (size <= tapebufsize)
225 tapebuf = malloc(size * TP_BSIZE + sizeof(struct tapebuf));
227 errx(1, "Cannot allocate space for tape buffer");
233 newcomprbuf(long size)
235 if (size <= comprlen)
237 comprlen = size + sizeof(struct tapebuf);
238 if (comprbuf != NULL)
240 comprbuf = malloc(comprlen);
241 if (comprbuf == NULL)
242 errx(1, "Cannot allocate space for decompress buffer");
244 #endif /* HAVE_ZLIB */
247 * Verify that the tape drive can be accessed and
248 * that it actually is a dump tape.
255 struct mtget mt_stat;
257 Vprintf(stdout, "Verify tape and initialize maps\n");
260 mt = rmtopen(magtape, 0);
266 mt = open(magtape, O_RDONLY, 0);
268 err(1, "%s", magtape);
271 /* need to know if input is really from a tape */
274 magtapein = rmtioctl(MTNOP, 1) != -1;
277 magtapein = ioctl(mt, MTIOCGET, (char *) &mt_stat) == 0;
280 Vprintf(stdout,"Input is from %s\n", magtapein? "tape": "file/pipe");
284 if (gethead(&spcl) == FAIL) {
285 blkcnt--; /* push back this block */
289 if (gethead(&spcl) == FAIL)
290 errx(1, "Tape is not a dump tape");
291 fprintf(stderr, "Converting to new file system format.\n");
295 fprintf(stderr, "Dump tape is compressed.\n");
297 newcomprbuf(bufsize);
299 errx(1,"This restore version doesn't support decompression");
300 #endif /* HAVE_ZLIB */
303 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC;
304 endoftapemark.s_spcl.c_type = TS_END;
305 ip = (int *)&endoftapemark;
306 j = sizeof(union u_spcl) / sizeof(int);
311 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
313 if (vflag || command == 't' || command == 'C')
315 if (filesys[0] == '\0') {
317 strncpy(filesys, spcl.c_filesys, NAMELEN);
318 filesys[NAMELEN - 1] = '\0';
319 dirptr = strstr(filesys, " (dir");
323 dumptime = spcl.c_ddate;
324 dumpdate = spcl.c_date;
325 if (stat(".", &stbuf) < 0)
326 err(1, "cannot stat .");
327 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
329 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
330 fssize = stbuf.st_blksize;
331 if (((fssize - 1) & fssize) != 0)
332 errx(1, "bad block size %ld", fssize);
333 if (spcl.c_volume != 1)
334 errx(1, "Tape is not volume 1 of the dump");
335 if (gethead(&spcl) == FAIL) {
336 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
337 panic("no header after volume mark!\n");
340 if (spcl.c_type != TS_CLRI)
341 errx(1, "Cannot find file removal list");
342 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
343 Dprintf(stdout, "maxino = %ld\n", (long)maxino);
344 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
346 errx(1, "no memory for active inode map");
348 curfile.action = USING;
349 getfile(xtrmap, xtrmapskip);
350 if (spcl.c_type != TS_BITS)
351 errx(1, "Cannot find file dump list");
352 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
353 if (map == (char *)NULL)
354 errx(1, "no memory for file dump list");
356 curfile.action = USING;
357 getfile(xtrmap, xtrmapskip);
359 * If there may be whiteout entries on the tape, pretend that the
360 * whiteout inode exists, so that the whiteout entries can be
364 SETINO(WINO, dumpmap);
368 * Prompt user to load a new dump volume.
369 * "Nextvol" is the next suggested volume to use.
370 * This suggested volume is enforced when doing full
371 * or incremental restores, but can be overridden by
372 * the user when only extracting a subset of the files.
377 long newvol = 0, savecnt = 0, wantnext = 0, i;
378 union u_spcl tmpspcl;
379 # define tmpbuf tmpspcl.s_spcl
389 panic("Changing volumes on pipe input?\n");
397 exit(1); /* pipes do not get a second chance */
398 if (command == 'R' || command == 'r' || curfile.action != SKIP) {
405 while (newvol <= 0) {
406 if (tapesread == 0) {
407 fprintf(stderr, "%s%s%s%s%s",
408 "You have not read any tapes yet.\n",
409 "Unless you know which volume your",
410 " file(s) are on you should start\n",
411 "with the last volume and work",
412 " towards the first.\n");
414 fprintf(stderr, "You have read volumes");
416 for (i = 1; i < 32; i++)
417 if (tapesread & (1 << i)) {
418 fprintf(stderr, "%s%ld", buf, (long)i);
421 fprintf(stderr, "\n");
424 fprintf(stderr, "Specify next volume #: ");
425 (void) fflush(stderr);
426 (void) fgets(buf, TP_BSIZE, terminal);
427 } while (!feof(terminal) && buf[0] == '\n');
433 "Volume numbers are positive numerics\n");
436 if (newvol == volno) {
437 tapesread |= 1 << volno;
442 snprintf(magtape, MAXPATHLEN, "%s%03ld", magtapeprefix, newvol);
443 magtape[MAXPATHLEN - 1] = '\0';
445 if (!Mflag || haderror) {
447 fprintf(stderr, "Mount tape volume %ld\n", (long)newvol);
448 fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
449 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
450 (void) fflush(stderr);
451 (void) fgets(buf, TP_BSIZE, terminal);
454 if (!strcmp(buf, "none\n")) {
458 if (buf[0] != '\n') {
459 (void) strcpy(magtape, buf);
460 magtape[strlen(magtape) - 1] = '\0';
465 mt = rmtopen(magtape, 0);
468 mt = open(magtape, O_RDONLY, 0);
471 fprintf(stderr, "Cannot open %s\n", magtape);
480 if (gethead(&tmpbuf) == FAIL) {
481 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
482 fprintf(stderr, "tape is not dump tape\n");
487 if (tmpbuf.c_volume != volno) {
488 fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume);
493 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
494 fprintf(stderr, "Wrong dump date\n\tgot: %s",
495 ctime4(&tmpbuf.c_date));
496 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
501 tapesread |= 1 << volno;
504 * If continuing from the previous volume, skip over any
505 * blocks read already at the end of the previous volume.
507 * If coming to this volume at random, skip to the beginning
508 * of the next record.
510 Dprintf(stdout, "read %ld recs, tape starts with %ld\n",
511 tpblksread, (long)tmpbuf.c_firstrec);
512 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
514 tpblksread = tmpbuf.c_firstrec;
515 for (i = tmpbuf.c_count; i > 0; i--)
517 } else if (tmpbuf.c_firstrec > 0 &&
518 tmpbuf.c_firstrec < tpblksread - 1) {
520 * -1 since we've read the volume header
522 i = tpblksread - tmpbuf.c_firstrec - 1;
523 Dprintf(stderr, "Skipping %ld duplicate record%s.\n",
524 (long)i, i > 1 ? "s" : "");
529 if (curfile.action == USING) {
531 panic("active file into volume 1\n");
535 * Skip up to the beginning of the next record
537 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
538 for (i = tmpbuf.c_count; i > 0; i--)
540 (void) gethead(&spcl);
544 siglongjmp(restart, 1);
549 * Handle unexpected EOF.
555 if (gettingfile && curfile.action == USING) {
556 printf("Warning: %s %s\n",
557 "End-of-input encountered while extracting", curfile.name);
559 curfile.name = "<name unknown>";
560 curfile.action = UNKNOWN;
562 curfile.ino = maxino;
565 siglongjmp(restart, 1);
570 * handle multiple dumps per tape by skipping forward to the
578 if (dumpnum == 1 || volno != 1)
581 errx(1, "Cannot have multiple dumps on pipe input");
583 tcom.mt_count = dumpnum - 1;
586 rmtioctl(MTFSF, dumpnum - 1);
589 if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0)
596 fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date));
597 fprintf(stdout, "Dumped from: %s",
598 (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate));
599 if (spcl.c_host[0] == '\0')
601 fprintf(stdout, "Level %d dump of %s on %s:%s\n",
602 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
603 fprintf(stdout, "Label: %s\n", spcl.c_label);
607 extractfile(char *name)
611 struct timeval timep[2];
615 curfile.action = USING;
617 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
618 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
619 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
620 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
621 #else /* __linux__ */
622 timep[0].tv_sec = curfile.dip->di_atime;
623 timep[0].tv_usec = curfile.dip->di_atimensec / 1000;
624 timep[1].tv_sec = curfile.dip->di_mtime;
625 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000;
626 #endif /* __linux__ */
627 mode = curfile.dip->di_mode;
628 flags = curfile.dip->di_flags;
629 switch (mode & IFMT) {
632 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
637 Vprintf(stdout, "skipped socket %s\n", name);
643 ep = lookupname(name);
644 if (ep == NULL || ep->e_flags & EXTRACT)
645 panic("unextracted directory %s\n", name);
649 Vprintf(stdout, "extract file %s\n", name);
650 return (genliteraldir(name, curfile.ino));
655 uid_t luid = curfile.dip->di_uid;
656 gid_t lgid = curfile.dip->di_gid;
660 getfile(xtrlnkfile, xtrlnkskip);
663 "%s: zero length symbolic link (ignored)\n", name);
666 if (linkit(lnkbuf, name, SYMLINK) == FAIL)
669 (void) lchown(name, luid, lgid);
675 Vprintf(stdout, "extract fifo %s\n", name);
682 if (mkfifo(name, mode) < 0) {
683 warn("%s: cannot create fifo", name);
687 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
688 (void) chmod(name, mode);
691 (void) fsetflags(name, flags);
693 (void) chflags(name, flags);
701 Vprintf(stdout, "extract special file %s\n", name);
708 if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) {
709 warn("%s: cannot create special file", name);
713 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
714 (void) chmod(name, mode);
718 warn("%s: fsetflags called on a special file", name);
719 (void) fsetflags(name, flags);
722 (void) chflags(name, flags);
729 Vprintf(stdout, "extract file %s\n", name);
736 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC,
738 warn("%s: cannot create file", name);
742 (void) fchown(ofile, curfile.dip->di_uid, curfile.dip->di_gid);
743 (void) fchmod(ofile, mode);
746 (void) setflags(ofile, flags);
748 (void) fchflags(ofile, flags);
750 getfile(xtrfile, xtrskip);
759 * skip over bit maps on the tape
765 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
770 * skip over a file on the tape
776 curfile.action = SKIP;
777 getfile(xtrnull, xtrnull);
781 * Extract a file from the tape.
782 * When an allocated block is found it is passed to the fill function;
783 * when an unallocated block (hole) is found, a zeroed buffer is passed
784 * to the skip function.
787 getfile(void (*fill) __P((char *, size_t)), void (*skip) __P((char *, size_t)))
790 volatile int curblk = 0;
791 volatile quad_t size = spcl.c_dinode.di_size;
792 volatile int last_write_was_hole = 0;
793 quad_t origsize = size;
794 static char clearedbuf[MAXBSIZE];
795 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
798 if (spcl.c_type == TS_END)
799 panic("ran off end of tape\n");
800 if (spcl.c_magic != NFS_MAGIC)
801 panic("not at beginning of a file\n");
802 if (!gettingfile && setjmp(restart) != 0)
806 for (i = 0; i < spcl.c_count; i++) {
807 if (readmapflag || spcl.c_addr[i]) {
808 readtape(&buf[curblk++][0]);
809 if (curblk == fssize / TP_BSIZE) {
810 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
811 fssize : (curblk - 1) * TP_BSIZE + size));
813 last_write_was_hole = 0;
817 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
819 (curblk - 1) * TP_BSIZE + size));
822 (*skip)(clearedbuf, (long)(size > TP_BSIZE ?
824 last_write_was_hole = 1;
826 if ((size -= TP_BSIZE) <= 0) {
827 for (i++; i < spcl.c_count; i++)
828 if (readmapflag || spcl.c_addr[i])
833 if (gethead(&spcl) == GOOD && size > 0) {
834 if (spcl.c_type == TS_ADDR)
837 "Missing address (header) block for %s at %ld blocks\n",
838 curfile.name, (long)blksread);
841 (*fill)((char *)buf, (size_t)(curblk * TP_BSIZE) + size);
842 last_write_was_hole = 0;
845 fprintf(stderr, "Missing blocks at the end of %s, assuming hole\n", curfile.name);
846 (*skip)(clearedbuf, size);
847 last_write_was_hole = 1;
849 if (last_write_was_hole) {
850 ftruncate(ofile, origsize);
857 * Write out the next block of a file.
860 xtrfile(char *buf, size_t size)
865 if (write(ofile, buf, (int) size) == -1)
866 err(1, "write error extracting inode %lu, name %s\nwrite",
867 (unsigned long)curfile.ino, curfile.name);
871 * Skip over a hole in a file.
875 xtrskip(char *buf, size_t size)
878 if (lseek(ofile, (off_t)size, SEEK_CUR) == -1)
879 err(1, "seek error extracting inode %lu, name %s\nlseek",
880 (unsigned long)curfile.ino, curfile.name);
884 * Collect the next block of a symbolic link.
887 xtrlnkfile(char *buf, size_t size)
891 if (pathlen > MAXPATHLEN)
892 errx(1, "symbolic link name: %s->%s%s; too long %d",
893 curfile.name, lnkbuf, buf, pathlen);
894 (void) strcat(lnkbuf, buf);
898 * Skip over a hole in a symbolic link (should never happen).
902 xtrlnkskip(char *buf, size_t size)
905 errx(1, "unallocated block in symbolic link %s", curfile.name);
909 * Collect the next block of a bit map.
912 xtrmap(char *buf, size_t size)
915 memmove(map, buf, size);
920 * Skip over a hole in a bit map (should never happen).
924 xtrmapskip(char *buf, size_t size)
927 panic("hole in map\n");
932 * Noop, when an extraction function is not needed.
936 xtrnull(char *buf, size_t size)
944 * Compare the next block of a file.
947 xtrcmpfile(char *buf, size_t size)
949 static char cmpbuf[MAXBSIZE];
954 if (read(ifile, cmpbuf, size) != size) {
955 fprintf(stderr, "%s: size has changed.\n",
961 if (memcmp(buf, cmpbuf, size) != 0) {
962 fprintf(stderr, "%s: tape and disk copies are different\n",
970 * Skip over a hole in a file.
973 xtrcmpskip(char *buf, size_t size)
975 static char cmpbuf[MAXBSIZE];
981 if (read(ifile, cmpbuf, size) != size) {
982 fprintf(stderr, "%s: size has changed.\n",
988 for (i = 0; i < size; ++i)
989 if (cmpbuf[i] != '\0') {
990 fprintf(stderr, "%s: tape and disk copies are different\n",
996 #endif /* COMPARE_ONTHEFLY */
998 #if !COMPARE_ONTHEFLY
1000 do_cmpfiles(int fd_tape, int fd_disk, long size)
1002 static char buf_tape[BUFSIZ];
1003 static char buf_disk[BUFSIZ];
1008 if ((n_tape = read(fd_tape, buf_tape, sizeof(buf_tape))) < 1) {
1009 close(fd_tape), close(fd_disk);
1010 panic("do_cmpfiles: unexpected EOF[1]");
1012 if ((n_disk = read(fd_disk, buf_disk, sizeof(buf_tape))) < 1) {
1013 close(fd_tape), close(fd_disk);
1014 panic("do_cmpfiles: unexpected EOF[2]");
1016 if (n_tape != n_disk) {
1017 close(fd_tape), close(fd_disk);
1018 panic("do_cmpfiles: sizes different!");
1020 if (memcmp(buf_tape, buf_disk, (size_t)n_tape) != 0) return (1);
1026 /* for debugging compare problems */
1027 #undef COMPARE_FAIL_KEEP_FILE
1030 #ifdef COMPARE_FAIL_KEEP_FILE
1031 /* return true if tapefile should be unlinked after compare */
1036 cmpfiles(char *tapefile, char *diskfile, struct stat *sbuf_disk)
1038 struct stat sbuf_tape;
1039 int fd_tape, fd_disk;
1041 if (stat(tapefile, &sbuf_tape) != 0) {
1042 panic("Can't lstat tmp file %s: %s\n", tapefile,
1047 if (sbuf_disk->st_size != sbuf_tape.st_size) {
1049 "%s: size changed from %ld to %ld.\n",
1050 diskfile, (long)sbuf_tape.st_size, (long)sbuf_disk->st_size);
1052 #ifdef COMPARE_FAIL_KEEP_FILE
1059 if ((fd_tape = open(tapefile, O_RDONLY)) < 0) {
1060 panic("Can't open %s: %s\n", tapefile, strerror(errno));
1063 if ((fd_disk = open(diskfile, O_RDONLY)) < 0) {
1065 panic("Can't open %s: %s\n", diskfile, strerror(errno));
1069 if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) {
1070 fprintf(stderr, "%s: tape and disk copies are different\n",
1075 #ifdef COMPARE_FAIL_KEEP_FILE
1076 /* rename the file to live in /tmp */
1077 /* rename `tapefile' to /tmp/<basename of diskfile> */
1079 char *p = strrchr(diskfile, '/');
1080 char newname[MAXPATHLEN];
1082 panic("can't find / in %s\n", diskfile);
1084 snprintf(newname, sizeof(newname), "%s/debug/%s", tmpdir, p + 1);
1085 if (rename(tapefile, newname)) {
1086 panic("rename from %s to %s failed: %s\n",
1090 fprintf(stderr, "*** %s saved to %s\n",
1095 /* don't unlink the file (it's not there anymore */
1104 #ifdef COMPARE_FAIL_KEEP_FILE
1108 #endif /* !COMPARE_ONTHEFLY */
1110 #if !COMPARE_ONTHEFLY
1111 static char tmpfilename[MAXPATHLEN];
1115 comparefile(char *name)
1120 #if !COMPARE_ONTHEFLY
1121 static char *tmpfile = NULL;
1125 if ((r = lstat(name, &sb)) != 0) {
1126 warn("%s: does not exist (%d)", name, r);
1132 curfile.name = name;
1133 curfile.action = USING;
1134 mode = curfile.dip->di_mode;
1136 Vprintf(stdout, "comparing %s (size: %ld, mode: 0%o)\n", name,
1137 (long)sb.st_size, mode);
1139 if (sb.st_mode != mode) {
1140 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
1141 name, mode & 07777, sb.st_mode & 07777);
1144 switch (mode & IFMT) {
1158 char lbuf[MAXPATHLEN + 1];
1161 if (!(sb.st_mode & S_IFLNK)) {
1162 fprintf(stderr, "%s: is no longer a symbolic link\n",
1169 getfile(xtrlnkfile, xtrlnkskip);
1172 "%s: zero length symbolic link (ignored)\n",
1177 if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) {
1178 panic("readlink of %s failed: %s", name,
1183 if (strcmp(lbuf, lnkbuf) != 0) {
1185 "%s: symbolic link changed from %s to %s.\n",
1186 name, lnkbuf, lbuf);
1195 if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) {
1196 fprintf(stderr, "%s: no longer a special file\n",
1203 if (sb.st_rdev != (int)curfile.dip->di_rdev) {
1205 "%s: device changed from %d,%d to %d,%d.\n",
1207 ((int)curfile.dip->di_rdev >> 8) & 0xff,
1208 (int)curfile.dip->di_rdev & 0xff,
1209 ((int)sb.st_rdev >> 8) & 0xff,
1210 (int)sb.st_rdev & 0xff);
1217 #if COMPARE_ONTHEFLY
1218 if ((ifile = open(name, O_RDONLY)) < 0) {
1219 panic("Can't open %s: %s\n", name, strerror(errno));
1225 getfile(xtrcmpfile, xtrcmpskip);
1228 if (read(ifile, &c, 1) != 0) {
1229 fprintf(stderr, "%s: size has changed.\n",
1239 if (tmpfile == NULL) {
1240 /* argument to mktemp() must not be in RO space: */
1241 snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir);
1242 tmpfile = mktemp(&tmpfilename[0]);
1244 if ((stat(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) {
1245 panic("cannot delete tmp file %s: %s\n",
1246 tmpfile, strerror(errno));
1248 if ((ofile = open(tmpfile, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) {
1249 panic("cannot create file temp file %s: %s\n",
1250 name, strerror(errno));
1252 getfile(xtrfile, xtrskip);
1253 (void) close(ofile);
1254 #ifdef COMPARE_FAIL_KEEP_FILE
1255 if (cmpfiles(tmpfile, name, &sb))
1258 cmpfiles(tmpfile, name, &sb);
1261 #endif /* COMPARE_ONTHEFLY */
1268 static void (*readtape_func)(char *) = readtape_set;
1271 * Read TP_BSIZE blocks from the input.
1272 * Handle read errors, and end of media.
1273 * Decompress compressed blocks.
1278 (*readtape_func)(buf); /* call the actual processing routine */
1282 * Set function pointer for readtape() routine. zflag and magtapein must
1283 * be correctly set before the first call to readtape().
1286 readtape_set(char *buf)
1289 readtape_func = readtape_uncompr;
1292 readtape_func = readtape_comprtape;
1294 readtape_func = readtape_comprfile;
1299 #endif /* HAVE_ZLIB */
1302 * This is the original readtape(), it's used for reading uncompressed input.
1303 * Read TP_BSIZE blocks from the input.
1304 * Handle read errors, and end of media.
1308 readtape_uncompr(char *buf)
1313 ssize_t rd, newvol, i;
1314 int cnt, seek_failed;
1316 if (blkcnt < numtrec) {
1317 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1323 for (i = 0; i < ntrec; i++)
1324 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1327 cnt = ntrec * TP_BSIZE;
1334 i = rmtread(&tapebuf[rd], cnt);
1337 i = read(mt, &tapebuf[rd], cnt);
1340 * Check for mid-tape short read error.
1341 * If found, skip rest of buffer and start with the next.
1343 if (!pipein && numtrec < ntrec && i > 0) {
1344 Dprintf(stdout, "mid-media short read error.\n");
1348 * Handle partial block read.
1350 if (pipein && i == 0 && rd > 0)
1352 else if (i > 0 && i != ntrec * TP_BSIZE) {
1361 * Short read. Process the blocks read.
1363 if (i % TP_BSIZE != 0)
1365 "partial block read: %ld should be %ld\n",
1366 (long)i, ntrec * TP_BSIZE);
1367 numtrec = i / TP_BSIZE;
1371 * Handle read error.
1374 fprintf(stderr, "Tape read error while ");
1375 switch (curfile.action) {
1377 fprintf(stderr, "trying to set up tape\n");
1380 fprintf(stderr, "trying to resynchronize\n");
1383 fprintf(stderr, "restoring %s\n", curfile.name);
1386 fprintf(stderr, "skipping over inode %lu\n",
1387 (unsigned long)curfile.ino);
1390 if (!yflag && !reply("continue"))
1392 i = ntrec * TP_BSIZE;
1393 memset(tapebuf, 0, (size_t)i);
1396 seek_failed = (rmtseek(i, 1) < 0);
1399 seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1);
1402 warn("continuation failed");
1403 if (!yflag && !reply("assume end-of-tape and continue"))
1409 * Handle end of tape.
1412 Vprintf(stdout, "End-of-tape encountered\n");
1421 if (rd % TP_BSIZE != 0)
1422 panic("partial block read: %d should be %d\n",
1423 rd, ntrec * TP_BSIZE);
1425 memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE);
1428 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1436 * Read a compressed format block from a file or pipe and uncompress it.
1437 * Attempt to handle read errors, and end of file.
1440 readtape_comprfile(char *buf)
1442 long rl, size, i, ret;
1444 struct tapebuf *tpb;
1446 if (blkcnt < numtrec) {
1447 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1452 /* need to read the next block */
1454 for (i = 0; i < ntrec; i++)
1455 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1457 tpb = (struct tapebuf *) tapebuf;
1459 /* read the block prefix */
1460 ret = read_a_block(mt, tapebuf, PREFIXSIZE, &rl);
1466 if (size > bufsize) {
1467 /* something's wrong */
1468 Vprintf(stdout, "Prefix size error, max size %d, got %ld\n",
1471 tpb->length = bufsize;
1473 ret = read_a_block(mt, tpb->buf, size, &rl);
1477 tbufptr = decompress_tapebuf(tpb, rl + PREFIXSIZE);
1478 if (tbufptr == NULL) {
1479 msg_read_error("File decompression error while");
1480 if (!yflag && !reply("continue"))
1482 memset(tapebuf, 0, bufsize);
1487 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1493 /* Errors while reading from a file or pipe are catastrophic. Since
1494 * there are no block boundaries, it's impossible to bypass the
1495 * block in error and find the start of the next block.
1498 /* It's possible to have multiple input files using -M
1499 * and -f file1,file2...
1501 Vprintf(stdout, "End-of-File encountered\n");
1511 msg_read_error("Read error while");
1512 /* if (!yflag && !reply("continue")) */
1517 * Read compressed data from a tape and uncompress it.
1518 * Handle read errors, and end of media.
1519 * Since a tape consists of separate physical blocks, we try
1520 * to recover from errors by repositioning the tape to the next
1524 readtape_comprtape(char *buf)
1528 struct tapebuf *tpb;
1531 if (blkcnt < numtrec) {
1532 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1537 /* need to read the next block */
1539 for (i = 0; i < ntrec; i++)
1540 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1542 tpb = (struct tapebuf *) tapebuf;
1544 /* read the block */
1545 size = bufsize + PREFIXSIZE;
1546 ret = read_a_block(mt, tapebuf, size, &rl);
1550 tbufptr = decompress_tapebuf(tpb, rl);
1551 if (tbufptr == NULL) {
1552 msg_read_error("Tape decompression error while");
1553 if (!yflag && !reply("continue"))
1555 memset(tapebuf, 0, PREFIXSIZE + bufsize);
1561 /* Handle errors: EOT switches to the next volume, other errors
1562 * attempt to position the tape to the next block.
1565 Vprintf(stdout, "End-of-tape encountered\n");
1574 msg_read_error("Tape read error while");
1575 if (!yflag && !reply("continue"))
1577 memset(tapebuf, 0, PREFIXSIZE + bufsize);
1582 rl = rmtioctl(MTFSR, 1);
1588 rl = ioctl(mt, MTIOCTOP, &tcom);
1592 warn("continuation failed");
1593 if (!yflag && !reply("assume end-of-tape and continue"))
1595 ret = 0; /* end of tape */
1601 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1607 * Decompress a struct tapebuf into a buffer. readsize is the size read
1608 * from the tape/file and is used for error messages. Returns a pointer
1609 * to the location of the uncompressed buffer or NULL on errors.
1610 * Adjust numtrec and complain for a short block.
1613 decompress_tapebuf(struct tapebuf *tpbin, int readsize)
1615 /* If zflag is on, all blocks have a struct tapebuf prefix */
1616 /* zflag gets set in setup() from the dump header */
1617 int cresult, blocklen;
1618 unsigned long worklen;
1619 char *output = NULL,*reason = NULL, *lengtherr = NULL;
1621 /* build a length error message */
1622 blocklen = tpbin->length;
1623 if (readsize < blocklen + PREFIXSIZE)
1624 lengtherr = "short";
1626 if (readsize > blocklen + PREFIXSIZE)
1631 if (tpbin->compressed) {
1632 /* uncompress whatever we read, if it fails, complain later */
1633 cresult = uncompress(comprbuf, &worklen, tpbin->buf, blocklen);
1637 output = tpbin->buf;
1642 if (worklen != ntrec * TP_BSIZE) {
1643 /* short block, shouldn't happen, but... */
1644 reason = "length mismatch";
1645 if (worklen % TP_BSIZE == 0)
1646 numtrec = worklen / TP_BSIZE;
1650 reason = "not enough memory";
1653 reason = "buffer too small";
1656 reason = "data error";
1663 fprintf(stderr, "%s compressed block: %d expected: %d\n",
1664 lengtherr, readsize, tpbin->length + PREFIXSIZE);
1665 fprintf(stderr, "decompression error, block %ld: %s\n",
1666 tpblksread+1, reason);
1667 if (cresult != Z_OK) output = NULL;
1673 * Print an error message for a read error.
1674 * This was exteracted from the original readtape().
1677 msg_read_error(char *m)
1679 switch (curfile.action) {
1681 fprintf(stderr, "%s trying to set up tape\n", m);
1684 fprintf(stderr, "%s trying to resynchronize\n", m);
1687 fprintf(stderr, "%s restoring %s\n", m, curfile.name);
1690 fprintf(stderr, "%s skipping over inode %lu\n", m,
1691 (unsigned long)curfile.ino);
1695 #endif /* HAVE_ZLIB */
1698 * Read the first block and set the blocksize from its length. Test
1699 * if the block looks like a compressed dump tape. setup() will make
1700 * the final determination by checking the compressed flag if gethead()
1701 * finds a valid header. The test here is necessary to offset the buffer
1702 * by the size of the compressed prefix. zflag is set here so that
1703 * readtape_set can set the correct function pointer for readtape().
1704 * Note that the first block of each tape/file will not be compressed.
1707 findtapeblksize(void)
1711 struct tapebuf *tpb = (struct tapebuf *) tapebuf;
1712 struct s_spcl *spclpt = (struct s_spcl *) tpb->buf;
1714 for (i = 0; i < ntrec; i++)
1715 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1719 * For a pipe or file, read in the first record. For a tape, read
1722 len = magtapein ? bufsize + PREFIXSIZE: TP_BSIZE;
1724 if (read_a_block(mt, tapebuf, len, &i) <= 0)
1725 errx(1, "Tape read error on first record");
1728 * If the input is from a file or a pipe, we read TP_BSIZE
1729 * bytes looking for a compressed dump header, we then
1730 * need to read in the rest of the record, as determined by
1731 * tpb->length or bufsize. The first block of the dump is
1732 * guaranteed to not be compressed so we look at the header.
1735 if (tpb->length % TP_BSIZE == 0
1736 && tpb->length <= bufsize
1737 && tpb->compressed == 0
1738 && spclpt->c_type == TS_TAPE
1739 && spclpt->c_flags & DR_COMPRESSED) {
1740 /* Looks like it's a compressed dump block prefix, */
1741 /* read in the rest of the block based on tpb->length. */
1742 len = tpb->length - TP_BSIZE + PREFIXSIZE;
1743 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) <= 0
1745 errx(1,"Error reading dump file header");
1747 numtrec = ntrec = tpb->length / TP_BSIZE;
1751 /* read in the rest of the block based on bufsize */
1752 len = bufsize - TP_BSIZE;
1753 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) < 0
1754 || (i != len && i % TP_BSIZE != 0))
1755 errx(1,"Error reading dump file header");
1759 Vprintf(stdout, "Input block size is %ld\n", ntrec);
1764 * If the input is a tape, we tried to read PREFIXSIZE +
1765 * ntrec * TP_BSIZE bytes. If it's not a compressed dump tape
1766 * or the value of ntrec is too large, we have read less than
1767 * what we asked for; adjust the value of ntrec and test for
1768 * a compressed dump tape prefix.
1771 if (i % TP_BSIZE != 0) {
1772 if (i % TP_BSIZE == PREFIXSIZE
1773 && tpb->compressed == 0
1774 && spclpt->c_type == TS_TAPE
1775 && spclpt->c_flags & DR_COMPRESSED) {
1779 if (tpb->length > bufsize)
1780 errx(1, "Tape blocksize is too large, use "
1781 "\'-b %d\' ", tpb->length / TP_BSIZE);
1784 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
1787 ntrec = i / TP_BSIZE;
1789 Vprintf(stdout, "Tape block size is %ld\n", ntrec);
1793 * Read a block of data handling all of the messy details.
1795 static int read_a_block(int fd, char *buf, size_t len, long *lengthread)
1803 i = rmtread(buf, size);
1806 i = read(fd, buf, size);
1809 break; /* EOD or error */
1812 break; /* block at a time for mt */
1815 *lengthread = len - size;
1834 * Read the next block from the tape.
1835 * Check to see if it is one of several vintage headers.
1836 * If it is an old style header, convert it to a new style header.
1837 * If it is not any valid header, return an error.
1840 gethead(struct s_spcl *buf)
1848 char dummy[TP_BSIZE];
1855 u_int16_t c_inumber;
1860 u_int16_t odi_nlink;
1876 readtape((char *)buf);
1877 if (buf->c_magic != NFS_MAGIC) {
1878 if (swabi(buf->c_magic) != NFS_MAGIC)
1881 Vprintf(stdout, "Note: Doing Byte swapping\n");
1885 if (checksum((int *)buf) == FAIL)
1888 swabst((u_char *)"8i4s31i528bi192b2i", (u_char *)buf);
1891 readtape((char *)(&u_ospcl.s_ospcl));
1892 memset((char *)buf, 0, (long)TP_BSIZE);
1893 buf->c_type = u_ospcl.s_ospcl.c_type;
1894 buf->c_date = u_ospcl.s_ospcl.c_date;
1895 buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
1896 buf->c_volume = u_ospcl.s_ospcl.c_volume;
1897 buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
1898 buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
1899 buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
1900 buf->c_magic = u_ospcl.s_ospcl.c_magic;
1901 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
1902 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
1903 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
1904 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
1905 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
1906 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
1908 buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime;
1909 buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime;
1910 buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime;
1911 #else /* __linux__ */
1912 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
1913 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
1914 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
1915 #endif /* __linux__ */
1916 buf->c_count = u_ospcl.s_ospcl.c_count;
1917 memmove(buf->c_addr, u_ospcl.s_ospcl.c_addr, (long)256);
1918 if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC ||
1919 checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
1921 buf->c_magic = NFS_MAGIC;
1924 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
1925 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
1926 qcvt.qval = buf->c_dinode.di_size;
1927 if (qcvt.val[0] || qcvt.val[1]) {
1928 printf("Note: Doing Quad swapping\n");
1933 qcvt.qval = buf->c_dinode.di_size;
1935 qcvt.val[1] = qcvt.val[0];
1937 buf->c_dinode.di_size = qcvt.qval;
1941 switch (buf->c_type) {
1946 * Have to patch up missing information in bit map headers
1949 buf->c_dinode.di_size = buf->c_count * TP_BSIZE;
1950 if (buf->c_count > TP_NINDIR)
1953 for (i = 0; i < buf->c_count; i++)
1958 if ((buf->c_flags & DR_NEWINODEFMT) == 0)
1970 panic("gethead: unknown inode type %d\n", buf->c_type);
1974 * If we are restoring a filesystem with old format inodes,
1975 * copy the uid/gid to the new location.
1978 buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
1979 buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
1987 * Check that a header is where it belongs and predict the next header
1990 accthdr(struct s_spcl *header)
1992 static dump_ino_t previno = 0x7fffffff;
1993 static int prevtype;
1994 static long predict;
1997 if (header->c_type == TS_TAPE) {
1998 fprintf(stderr, "Volume header (%s inode format) ",
1999 oldinofmt ? "old" : "new");
2000 if (header->c_firstrec)
2001 fprintf(stderr, "begins with record %d",
2002 header->c_firstrec);
2003 fprintf(stderr, "\n");
2004 previno = 0x7fffffff;
2007 if (previno == 0x7fffffff)
2011 fprintf(stderr, "Dumped inodes map header");
2014 fprintf(stderr, "Used inodes map header");
2017 fprintf(stderr, "File header, ino %lu", (unsigned long)previno);
2020 fprintf(stderr, "File continuation header, ino %ld", (long)previno);
2023 fprintf(stderr, "End of tape header");
2026 if (predict != blksread - 1)
2027 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
2028 predict, blksread - 1);
2029 fprintf(stderr, "\n");
2032 if (header->c_type != TS_END)
2033 for (i = 0; i < header->c_count; i++)
2034 if (readmapflag || header->c_addr[i] != 0)
2038 prevtype = header->c_type;
2039 previno = header->c_inumber;
2043 * Find an inode header.
2044 * Complain if had to skip, and complain is set.
2047 findinode(struct s_spcl *header)
2049 static long skipcnt = 0;
2053 curfile.name = "<name unknown>";
2054 curfile.action = UNKNOWN;
2058 if (header->c_magic != NFS_MAGIC) {
2060 while (gethead(header) == FAIL ||
2061 header->c_date != dumpdate)
2064 switch (header->c_type) {
2068 * Skip up to the beginning of the next record
2070 for (i = 0; i < header->c_count; i++)
2071 if (header->c_addr[i])
2073 while (gethead(header) == FAIL ||
2074 header->c_date != dumpdate)
2079 curfile.dip = &header->c_dinode;
2080 curfile.ino = header->c_inumber;
2084 curfile.ino = maxino;
2088 curfile.name = "<file removal list>";
2092 curfile.name = "<file dump list>";
2096 panic("unexpected tape header\n");
2100 panic("unknown tape header type %d\n", spcl.c_type);
2104 } while (header->c_type == TS_ADDR);
2109 fprintf(stderr, "resync restore, skipped %ld blocks\n",
2119 j = sizeof(union u_spcl) / sizeof(int);
2126 /* What happens if we want to read restore tapes
2127 for a 16bit int machine??? */
2133 if (i != CHECKSUM) {
2134 fprintf(stderr, "Checksum error %o, inode %lu file %s\n", i,
2135 (unsigned long)curfile.ino, curfile.name);
2145 #include <varargs.h>
2150 msg(const char *fmt, ...)
2163 (void)vfprintf(stderr, fmt, ap);
2166 #endif /* RRESTORE */
2169 swab16(u_char *sp, int n)
2174 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
2181 swab32(u_char *sp, int n)
2186 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
2187 c = sp[1]; sp[1] = sp[2]; sp[2] = c;
2194 swab64(u_char *sp, int n)
2199 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
2200 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
2201 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
2202 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
2209 swabst(u_char *cp, u_char *sp)
2215 case '0': case '1': case '2': case '3': case '4':
2216 case '5': case '6': case '7': case '8': case '9':
2217 n = (n * 10) + (*cp++ - '0');
2220 case 's': case 'w': case 'h':
2238 default: /* Any other character, like 'b' counts as byte. */
2252 swabst((u_char *)"i", (u_char *)&x);
2260 swabst((u_char *)"l", (u_char *)&x);
2267 * get the current position of the tape
2270 GetTapePos(long *pos)
2275 if (ioctl(mt, MTIOCPOS, pos) == -1) {
2277 fprintf(stdout, "[%ld] error: %d (getting tapepos: %ld)\n",
2278 (unsigned long)getpid(), err, *pos);
2284 typedef struct mt_pos {
2287 } MTPosRec, *MTPosPtr;
2290 * go to specified position on tape
2293 GotoTapePos(long pos)
2300 if (ioctl(mt, MTIOCTOP, &buf) == -1) {
2302 fprintf(stdout, "[%ld] error: %d (setting tapepos: %ld)\n",
2303 (unsigned long)getpid(), err, pos);
2310 * read next data from tape to re-sync
2313 ReReadFromTape(void)
2317 if (gethead(&spcl) == FAIL) {
2319 fprintf(stdout, "DEBUG 1 gethead failed\n");
2327 RequestVol(long tnum)
2332 #endif /* USE_QFA */