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 1.37 2001/04/27 15:22:47 stelian Exp $";
53 #include <compatlfs.h>
55 #include <compaterr.h>
62 #include <sys/param.h>
70 #include <linux/ext2_fs.h>
71 #include <ext2fs/ext2fs.h>
72 #include <bsdcompat.h>
74 #include <ufs/ufs/dinode.h>
75 #endif /* __linux__ */
76 #include <protocols/dumprestore.h>
80 #endif /* HAVE_ZLIB */
84 #include "pathnames.h"
89 static long fssize = MAXBSIZE;
91 static int pipein = 0;
92 static int magtapein = 0; /* input is from magtape */
93 static char magtape[MAXPATHLEN];
94 static char magtapeprefix[MAXPATHLEN];
97 static char *tapebuf; /* input buffer for read */
98 static int bufsize; /* buffer size without prefix */
99 static char *tbufptr = NULL; /* active tape buffer */
101 static char *comprbuf; /* uncompress work buf */
102 static size_t comprlen; /* size including prefix */
104 static union u_spcl endoftapemark;
105 static long blksread; /* blocks read since last header */
106 static long tpblksread = 0; /* TP_BSIZE blocks read */
107 static long tapesread;
108 static sigjmp_buf restart;
109 static int gettingfile = 0; /* restart has a valid frame */
110 static char *host = NULL;
114 static char lnkbuf[MAXPATHLEN + 1];
117 int oldinofmt; /* old inode format conversion required */
118 int Bcvt; /* Swap Bytes (for CCI or sun) */
119 static int Qcvt; /* Swap quads (for sun) */
121 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
123 static void accthdr __P((struct s_spcl *));
124 static int checksum __P((int *));
125 static void findinode __P((struct s_spcl *));
126 static void findtapeblksize __P((void));
127 static int gethead __P((struct s_spcl *));
128 static void readtape __P((char *));
129 static void setdumpnum __P((void));
130 static u_int swabi __P((u_int));
132 static u_long swabl __P((u_long));
134 static u_char *swab64 __P((u_char *, int));
135 static u_char *swab32 __P((u_char *, int));
136 static u_char *swab16 __P((u_char *, int));
137 static void terminateinput __P((void));
138 static void xtrfile __P((char *, size_t));
139 static void xtrlnkfile __P((char *, size_t));
140 static void xtrlnkskip __P((char *, size_t));
141 static void xtrmap __P((char *, size_t));
142 static void xtrmapskip __P((char *, size_t));
143 static void xtrskip __P((char *, size_t));
146 static void newcomprbuf __P((long));
147 static void readtape_set __P((char *));
148 static void readtape_uncompr __P((char *));
149 static void readtape_comprfile __P((char *));
150 static void readtape_comprtape __P((char *));
151 static char *decompress_tapebuf __P((struct tapebuf *, int));
152 static void msg_read_error __P((char *));
154 static int read_a_block __P((int, char *, size_t, long *));
155 #define PREFIXSIZE sizeof(struct tapebuf)
157 #define COMPARE_ONTHEFLY 1
160 static int ifile; /* input file for compare */
161 static int cmperror; /* compare error */
162 static void xtrcmpfile __P((char *, size_t));
163 static void xtrcmpskip __P((char *, size_t));
166 static int readmapflag;
169 * Set up an input source. This is called from main.c before setup() is.
172 setinput(char *source)
178 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
182 if (strchr(source, ':')) {
184 source = strchr(host, ':');
186 if (rmthost(host) == 0)
190 if (strcmp(source, "-") == 0) {
192 * Since input is coming from a pipe we must establish
193 * our own connection to the terminal.
195 terminal = fopen(_PATH_TTY, "r");
196 if (terminal == NULL) {
197 warn("cannot open %s", _PATH_TTY);
198 terminal = fopen(_PATH_DEVNULL, "r");
199 if (terminal == NULL)
200 err(1, "cannot open %s", _PATH_DEVNULL);
204 setuid(getuid()); /* no longer need or want root privileges */
206 strncpy(magtapeprefix, source, MAXPATHLEN);
207 magtapeprefix[MAXPATHLEN-1] = '\0';
208 snprintf(magtape, MAXPATHLEN, "%s%03d", source, 1);
211 strncpy(magtape, source, MAXPATHLEN);
212 magtape[MAXPATHLEN - 1] = '\0';
216 newtapebuf(long size)
218 static int tapebufsize = -1;
221 bufsize = ntrec * TP_BSIZE;
222 if (size <= tapebufsize)
226 tapebuf = malloc(size * TP_BSIZE + sizeof(struct tapebuf));
228 errx(1, "Cannot allocate space for tape buffer");
234 newcomprbuf(long size)
236 if (size <= comprlen)
238 comprlen = size + sizeof(struct tapebuf);
239 if (comprbuf != NULL)
241 comprbuf = malloc(comprlen);
242 if (comprbuf == NULL)
243 errx(1, "Cannot allocate space for decompress buffer");
245 #endif /* HAVE_ZLIB */
248 * Verify that the tape drive can be accessed and
249 * that it actually is a dump tape.
256 struct mtget mt_stat;
258 Vprintf(stdout, "Verify tape and initialize maps\n");
261 mt = rmtopen(magtape, 0);
267 mt = OPEN(magtape, O_RDONLY, 0);
269 err(1, "%s", magtape);
272 /* need to know if input is really from a tape */
275 magtapein = rmtioctl(MTNOP, 1) != -1;
278 if (ioctl(mt, MTIOCGET, (char *) &mt_stat) == 0) {
279 if (mt_stat.mt_dsreg & 0xffff)
280 magtapein = 1; /* fixed blocksize */
282 magtapein = 2; /* variable blocksize */
286 Vprintf(stdout,"Input is from %s\n", magtapein? "tape": "file/pipe");
290 if (gethead(&spcl) == FAIL) {
291 blkcnt--; /* push back this block */
295 if (gethead(&spcl) == FAIL)
296 errx(1, "Tape is not a dump tape");
297 fprintf(stderr, "Converting to new file system format.\n");
301 fprintf(stderr, "Dump tape is compressed.\n");
303 newcomprbuf(bufsize);
305 errx(1,"This restore version doesn't support decompression");
306 #endif /* HAVE_ZLIB */
309 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC;
310 endoftapemark.s_spcl.c_type = TS_END;
311 ip = (int *)&endoftapemark;
312 j = sizeof(union u_spcl) / sizeof(int);
317 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
319 if (vflag || command == 't' || command == 'C')
321 if (filesys[0] == '\0') {
323 strncpy(filesys, spcl.c_filesys, NAMELEN);
324 filesys[NAMELEN - 1] = '\0';
325 dirptr = strstr(filesys, " (dir");
329 dumptime = spcl.c_ddate;
330 dumpdate = spcl.c_date;
331 if (STAT(".", &stbuf) < 0)
332 err(1, "cannot stat .");
333 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
335 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
336 fssize = stbuf.st_blksize;
337 if (((fssize - 1) & fssize) != 0)
338 errx(1, "bad block size %ld", fssize);
339 if (spcl.c_volume != 1)
340 errx(1, "Tape is not volume 1 of the dump");
341 if (gethead(&spcl) == FAIL) {
342 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
343 panic("no header after volume mark!\n");
346 if (spcl.c_type != TS_CLRI)
347 errx(1, "Cannot find file removal list");
348 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
349 Dprintf(stdout, "maxino = %ld\n", (long)maxino);
350 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
352 errx(1, "no memory for active inode map");
354 curfile.action = USING;
355 getfile(xtrmap, xtrmapskip);
356 if (spcl.c_type != TS_BITS)
357 errx(1, "Cannot find file dump list");
358 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
359 if (map == (char *)NULL)
360 errx(1, "no memory for file dump list");
362 curfile.action = USING;
363 getfile(xtrmap, xtrmapskip);
365 * If there may be whiteout entries on the tape, pretend that the
366 * whiteout inode exists, so that the whiteout entries can be
370 SETINO(WINO, dumpmap);
374 * Prompt user to load a new dump volume.
375 * "Nextvol" is the next suggested volume to use.
376 * This suggested volume is enforced when doing full
377 * or incremental restores, but can be overridden by
378 * the user when only extracting a subset of the files.
383 long newvol = 0, savecnt = 0, wantnext = 0, i;
384 union u_spcl tmpspcl;
385 # define tmpbuf tmpspcl.s_spcl
395 panic("Changing volumes on pipe input?\n");
403 exit(1); /* pipes do not get a second chance */
404 if (command == 'R' || command == 'r' || curfile.action != SKIP) {
411 while (newvol <= 0) {
412 if (tapesread == 0) {
413 fprintf(stderr, "%s%s%s%s%s",
414 "You have not read any tapes yet.\n",
415 "Unless you know which volume your",
416 " file(s) are on you should start\n",
417 "with the last volume and work",
418 " towards the first.\n");
420 fprintf(stderr, "You have read volumes");
422 for (i = 1; i < 32; i++)
423 if (tapesread & (1 << i)) {
424 fprintf(stderr, "%s%ld", buf, (long)i);
427 fprintf(stderr, "\n");
430 fprintf(stderr, "Specify next volume #: ");
431 (void) fflush(stderr);
432 (void) fgets(buf, TP_BSIZE, terminal);
433 } while (!feof(terminal) && buf[0] == '\n');
439 "Volume numbers are positive numerics\n");
442 if (newvol == volno) {
443 tapesread |= 1 << volno;
448 snprintf(magtape, MAXPATHLEN, "%s%03ld", magtapeprefix, newvol);
449 magtape[MAXPATHLEN - 1] = '\0';
451 if (!Mflag || haderror) {
453 fprintf(stderr, "Mount tape volume %ld\n", (long)newvol);
454 fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
455 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
456 (void) fflush(stderr);
457 (void) fgets(buf, TP_BSIZE, terminal);
460 if (!strcmp(buf, "none\n")) {
464 if (buf[0] != '\n') {
465 (void) strcpy(magtape, buf);
466 magtape[strlen(magtape) - 1] = '\0';
471 mt = rmtopen(magtape, 0);
474 mt = OPEN(magtape, O_RDONLY, 0);
477 fprintf(stderr, "Cannot open %s\n", magtape);
486 if (gethead(&tmpbuf) == FAIL) {
487 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
488 fprintf(stderr, "tape is not dump tape\n");
493 if (tmpbuf.c_volume != volno) {
494 fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume);
499 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
500 fprintf(stderr, "Wrong dump date\n\tgot: %s",
501 ctime4(&tmpbuf.c_date));
502 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
507 tapesread |= 1 << volno;
510 * If continuing from the previous volume, skip over any
511 * blocks read already at the end of the previous volume.
513 * If coming to this volume at random, skip to the beginning
514 * of the next record.
516 Dprintf(stdout, "read %ld recs, tape starts with %ld\n",
517 tpblksread, (long)tmpbuf.c_firstrec);
518 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
520 tpblksread = tmpbuf.c_firstrec;
521 for (i = tmpbuf.c_count; i > 0; i--)
523 } else if (tmpbuf.c_firstrec > 0 &&
524 tmpbuf.c_firstrec < tpblksread - 1) {
526 * -1 since we've read the volume header
528 i = tpblksread - tmpbuf.c_firstrec - 1;
529 Dprintf(stderr, "Skipping %ld duplicate record%s.\n",
530 (long)i, i > 1 ? "s" : "");
535 if (curfile.action == USING) {
537 panic("active file into volume 1\n");
541 * Skip up to the beginning of the next record
543 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
544 for (i = tmpbuf.c_count; i > 0; i--)
546 (void) gethead(&spcl);
550 siglongjmp(restart, 1);
555 * Handle unexpected EOF.
561 if (gettingfile && curfile.action == USING) {
562 printf("Warning: %s %s\n",
563 "End-of-input encountered while extracting", curfile.name);
565 curfile.name = "<name unknown>";
566 curfile.action = UNKNOWN;
568 curfile.ino = maxino;
571 siglongjmp(restart, 1);
576 * handle multiple dumps per tape by skipping forward to the
584 if (dumpnum == 1 || volno != 1)
587 errx(1, "Cannot have multiple dumps on pipe input");
589 tcom.mt_count = dumpnum - 1;
592 rmtioctl(MTFSF, dumpnum - 1);
595 if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0)
602 fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date));
603 fprintf(stdout, "Dumped from: %s",
604 (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate));
605 if (spcl.c_host[0] == '\0')
607 fprintf(stdout, "Level %d dump of %s on %s:%s\n",
608 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
609 fprintf(stdout, "Label: %s\n", spcl.c_label);
613 extractfile(char *name)
617 struct timeval timep[2];
621 curfile.action = USING;
623 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
624 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
625 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
626 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
627 #else /* __linux__ */
628 timep[0].tv_sec = curfile.dip->di_atime;
629 timep[0].tv_usec = curfile.dip->di_atimensec / 1000;
630 timep[1].tv_sec = curfile.dip->di_mtime;
631 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000;
632 #endif /* __linux__ */
633 mode = curfile.dip->di_mode;
634 flags = curfile.dip->di_flags;
635 switch (mode & IFMT) {
638 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
643 Vprintf(stdout, "skipped socket %s\n", name);
649 ep = lookupname(name);
650 if (ep == NULL || ep->e_flags & EXTRACT)
651 panic("unextracted directory %s\n", name);
655 Vprintf(stdout, "extract file %s\n", name);
656 return (genliteraldir(name, curfile.ino));
661 uid_t luid = curfile.dip->di_uid;
662 gid_t lgid = curfile.dip->di_gid;
666 getfile(xtrlnkfile, xtrlnkskip);
669 "%s: zero length symbolic link (ignored)\n", name);
672 if (linkit(lnkbuf, name, SYMLINK) == FAIL)
675 (void) lchown(name, luid, lgid);
681 Vprintf(stdout, "extract fifo %s\n", name);
688 if (mkfifo(name, mode) < 0) {
689 warn("%s: cannot create fifo", name);
693 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
694 (void) chmod(name, mode);
697 (void) fsetflags(name, flags);
699 (void) chflags(name, flags);
707 Vprintf(stdout, "extract special file %s\n", name);
714 if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) {
715 warn("%s: cannot create special file", name);
719 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
720 (void) chmod(name, mode);
724 warn("%s: fsetflags called on a special file", name);
725 (void) fsetflags(name, flags);
728 (void) chflags(name, flags);
735 Vprintf(stdout, "extract file %s\n", name);
742 if ((ofile = OPEN(name, O_WRONLY | O_CREAT | O_TRUNC,
744 warn("%s: cannot create file", name);
748 (void) fchown(ofile, curfile.dip->di_uid, curfile.dip->di_gid);
749 (void) fchmod(ofile, mode);
752 (void) setflags(ofile, flags);
754 (void) fchflags(ofile, flags);
756 getfile(xtrfile, xtrskip);
765 * skip over bit maps on the tape
771 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
776 * skip over a file on the tape
782 curfile.action = SKIP;
783 getfile(xtrnull, xtrnull);
787 * Extract a file from the tape.
788 * When an allocated block is found it is passed to the fill function;
789 * when an unallocated block (hole) is found, a zeroed buffer is passed
790 * to the skip function.
793 getfile(void (*fill) __P((char *, size_t)), void (*skip) __P((char *, size_t)))
796 volatile int curblk = 0;
797 volatile quad_t size = spcl.c_dinode.di_size;
798 volatile int last_write_was_hole = 0;
799 quad_t origsize = size;
800 static char clearedbuf[MAXBSIZE];
801 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
804 if (spcl.c_type == TS_END)
805 panic("ran off end of tape\n");
806 if (spcl.c_magic != NFS_MAGIC)
807 panic("not at beginning of a file\n");
808 if (!gettingfile && setjmp(restart) != 0)
812 for (i = 0; i < spcl.c_count; i++) {
813 if (readmapflag || spcl.c_addr[i]) {
814 readtape(&buf[curblk++][0]);
815 if (curblk == fssize / TP_BSIZE) {
816 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
817 fssize : (curblk - 1) * TP_BSIZE + size));
819 last_write_was_hole = 0;
823 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
825 (curblk - 1) * TP_BSIZE + size));
828 (*skip)(clearedbuf, (long)(size > TP_BSIZE ?
830 last_write_was_hole = 1;
832 if ((size -= TP_BSIZE) <= 0) {
833 for (i++; i < spcl.c_count; i++)
834 if (readmapflag || spcl.c_addr[i])
839 if (gethead(&spcl) == GOOD && size > 0) {
840 if (spcl.c_type == TS_ADDR)
843 "Missing address (header) block for %s at %ld blocks\n",
844 curfile.name, (long)blksread);
847 (*fill)((char *)buf, (size_t)(curblk * TP_BSIZE) + size);
848 last_write_was_hole = 0;
851 fprintf(stderr, "Missing blocks at the end of %s, assuming hole\n", curfile.name);
853 size_t skp = size > TP_BSIZE ? TP_BSIZE : size;
854 (*skip)(clearedbuf, skp);
857 last_write_was_hole = 1;
859 if (last_write_was_hole) {
860 FTRUNCATE(ofile, origsize);
867 * Write out the next block of a file.
870 xtrfile(char *buf, size_t size)
875 if (write(ofile, buf, (int) size) == -1)
876 err(1, "write error extracting inode %lu, name %s\nwrite",
877 (unsigned long)curfile.ino, curfile.name);
881 * Skip over a hole in a file.
885 xtrskip(char *buf, size_t size)
888 if (LSEEK(ofile, (off_t)size, SEEK_CUR) == -1)
889 err(1, "seek error extracting inode %lu, name %s\nlseek",
890 (unsigned long)curfile.ino, curfile.name);
894 * Collect the next block of a symbolic link.
897 xtrlnkfile(char *buf, size_t size)
901 if (pathlen > MAXPATHLEN)
902 errx(1, "symbolic link name: %s->%s%s; too long %d",
903 curfile.name, lnkbuf, buf, pathlen);
904 (void) strcat(lnkbuf, buf);
908 * Skip over a hole in a symbolic link (should never happen).
912 xtrlnkskip(char *buf, size_t size)
915 errx(1, "unallocated block in symbolic link %s", curfile.name);
919 * Collect the next block of a bit map.
922 xtrmap(char *buf, size_t size)
925 memmove(map, buf, size);
930 * Skip over a hole in a bit map (should never happen).
934 xtrmapskip(char *buf, size_t size)
937 panic("hole in map\n");
942 * Noop, when an extraction function is not needed.
946 xtrnull(char *buf, size_t size)
954 * Compare the next block of a file.
957 xtrcmpfile(char *buf, size_t size)
959 static char cmpbuf[MAXBSIZE];
964 if (read(ifile, cmpbuf, size) != size) {
965 fprintf(stderr, "%s: size has changed.\n",
971 if (memcmp(buf, cmpbuf, size) != 0) {
972 fprintf(stderr, "%s: tape and disk copies are different\n",
980 * Skip over a hole in a file.
983 xtrcmpskip(char *buf, size_t size)
985 static char cmpbuf[MAXBSIZE];
991 if (read(ifile, cmpbuf, size) != size) {
992 fprintf(stderr, "%s: size has changed.\n",
998 for (i = 0; i < size; ++i)
999 if (cmpbuf[i] != '\0') {
1000 fprintf(stderr, "%s: tape and disk copies are different\n",
1006 #endif /* COMPARE_ONTHEFLY */
1008 #if !COMPARE_ONTHEFLY
1010 do_cmpfiles(int fd_tape, int fd_disk, long size)
1012 static char buf_tape[BUFSIZ];
1013 static char buf_disk[BUFSIZ];
1018 if ((n_tape = read(fd_tape, buf_tape, sizeof(buf_tape))) < 1) {
1019 close(fd_tape), close(fd_disk);
1020 panic("do_cmpfiles: unexpected EOF[1]");
1022 if ((n_disk = read(fd_disk, buf_disk, sizeof(buf_tape))) < 1) {
1023 close(fd_tape), close(fd_disk);
1024 panic("do_cmpfiles: unexpected EOF[2]");
1026 if (n_tape != n_disk) {
1027 close(fd_tape), close(fd_disk);
1028 panic("do_cmpfiles: sizes different!");
1030 if (memcmp(buf_tape, buf_disk, (size_t)n_tape) != 0) return (1);
1036 /* for debugging compare problems */
1037 #undef COMPARE_FAIL_KEEP_FILE
1040 #ifdef COMPARE_FAIL_KEEP_FILE
1041 /* return true if tapefile should be unlinked after compare */
1046 cmpfiles(char *tapefile, char *diskfile, struct STAT *sbuf_disk)
1048 struct STAT sbuf_tape;
1049 int fd_tape, fd_disk;
1051 if (STAT(tapefile, &sbuf_tape) != 0) {
1052 panic("Can't lstat tmp file %s: %s\n", tapefile,
1057 if (sbuf_disk->st_size != sbuf_tape.st_size) {
1059 "%s: size changed from %ld to %ld.\n",
1060 diskfile, (long)sbuf_tape.st_size, (long)sbuf_disk->st_size);
1062 #ifdef COMPARE_FAIL_KEEP_FILE
1069 if ((fd_tape = OPEN(tapefile, O_RDONLY)) < 0) {
1070 panic("Can't open %s: %s\n", tapefile, strerror(errno));
1073 if ((fd_disk = OPEN(diskfile, O_RDONLY)) < 0) {
1075 panic("Can't open %s: %s\n", diskfile, strerror(errno));
1079 if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) {
1080 fprintf(stderr, "%s: tape and disk copies are different\n",
1085 #ifdef COMPARE_FAIL_KEEP_FILE
1086 /* rename the file to live in /tmp */
1087 /* rename `tapefile' to /tmp/<basename of diskfile> */
1089 char *p = strrchr(diskfile, '/');
1090 char newname[MAXPATHLEN];
1092 panic("can't find / in %s\n", diskfile);
1094 snprintf(newname, sizeof(newname), "%s/debug/%s", tmpdir, p + 1);
1095 if (rename(tapefile, newname)) {
1096 panic("rename from %s to %s failed: %s\n",
1100 fprintf(stderr, "*** %s saved to %s\n",
1105 /* don't unlink the file (it's not there anymore */
1114 #ifdef COMPARE_FAIL_KEEP_FILE
1118 #endif /* !COMPARE_ONTHEFLY */
1120 #if !COMPARE_ONTHEFLY
1121 static char tmpfilename[MAXPATHLEN];
1125 comparefile(char *name)
1130 #if !COMPARE_ONTHEFLY
1131 static char *tmpfile = NULL;
1135 if ((r = LSTAT(name, &sb)) != 0) {
1136 warn("%s: does not exist (%d)", name, r);
1142 curfile.name = name;
1143 curfile.action = USING;
1144 mode = curfile.dip->di_mode;
1146 Vprintf(stdout, "comparing %s (size: %ld, mode: 0%o)\n", name,
1147 (long)sb.st_size, mode);
1149 if (sb.st_mode != mode) {
1150 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
1151 name, mode & 07777, sb.st_mode & 07777);
1154 switch (mode & IFMT) {
1168 char lbuf[MAXPATHLEN + 1];
1171 if (!(sb.st_mode & S_IFLNK)) {
1172 fprintf(stderr, "%s: is no longer a symbolic link\n",
1179 getfile(xtrlnkfile, xtrlnkskip);
1182 "%s: zero length symbolic link (ignored)\n",
1187 if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) {
1188 panic("readlink of %s failed: %s", name,
1193 if (strcmp(lbuf, lnkbuf) != 0) {
1195 "%s: symbolic link changed from %s to %s.\n",
1196 name, lnkbuf, lbuf);
1205 if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) {
1206 fprintf(stderr, "%s: no longer a special file\n",
1213 if (sb.st_rdev != (int)curfile.dip->di_rdev) {
1215 "%s: device changed from %d,%d to %d,%d.\n",
1217 ((int)curfile.dip->di_rdev >> 8) & 0xff,
1218 (int)curfile.dip->di_rdev & 0xff,
1219 ((int)sb.st_rdev >> 8) & 0xff,
1220 (int)sb.st_rdev & 0xff);
1227 #if COMPARE_ONTHEFLY
1228 if ((ifile = OPEN(name, O_RDONLY)) < 0) {
1229 panic("Can't open %s: %s\n", name, strerror(errno));
1235 getfile(xtrcmpfile, xtrcmpskip);
1238 if (read(ifile, &c, 1) != 0) {
1239 fprintf(stderr, "%s: size has changed.\n",
1249 if (tmpfile == NULL) {
1250 /* argument to mktemp() must not be in RO space: */
1251 snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir);
1252 tmpfile = mktemp(&tmpfilename[0]);
1254 if ((STAT(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) {
1255 panic("cannot delete tmp file %s: %s\n",
1256 tmpfile, strerror(errno));
1258 if ((ofile = OPEN(tmpfile, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) {
1259 panic("cannot create file temp file %s: %s\n",
1260 name, strerror(errno));
1262 getfile(xtrfile, xtrskip);
1263 (void) close(ofile);
1264 #ifdef COMPARE_FAIL_KEEP_FILE
1265 if (cmpfiles(tmpfile, name, &sb))
1268 cmpfiles(tmpfile, name, &sb);
1271 #endif /* COMPARE_ONTHEFLY */
1278 static void (*readtape_func)(char *) = readtape_set;
1281 * Read TP_BSIZE blocks from the input.
1282 * Handle read errors, and end of media.
1283 * Decompress compressed blocks.
1288 (*readtape_func)(buf); /* call the actual processing routine */
1292 * Set function pointer for readtape() routine. zflag and magtapein must
1293 * be correctly set before the first call to readtape().
1296 readtape_set(char *buf)
1299 readtape_func = readtape_uncompr;
1302 readtape_func = readtape_comprtape;
1304 readtape_func = readtape_comprfile;
1309 #endif /* HAVE_ZLIB */
1312 * This is the original readtape(), it's used for reading uncompressed input.
1313 * Read TP_BSIZE blocks from the input.
1314 * Handle read errors, and end of media.
1318 readtape_uncompr(char *buf)
1323 ssize_t rd, newvol, i;
1324 int cnt, seek_failed;
1326 if (blkcnt < numtrec) {
1327 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1333 for (i = 0; i < ntrec; i++)
1334 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1337 cnt = ntrec * TP_BSIZE;
1342 i = rmtread(&tapebuf[rd], cnt);
1345 i = read(mt, &tapebuf[rd], cnt);
1348 * Check for mid-tape short read error.
1349 * If found, skip rest of buffer and start with the next.
1351 if (!pipein && numtrec < ntrec && i > 0) {
1352 Dprintf(stdout, "mid-media short read error.\n");
1356 * Handle partial block read.
1358 if (pipein && i == 0 && rd > 0)
1360 else if (i > 0 && i != ntrec * TP_BSIZE) {
1369 * Short read. Process the blocks read.
1371 if (i % TP_BSIZE != 0)
1373 "partial block read: %ld should be %ld\n",
1374 (long)i, ntrec * TP_BSIZE);
1375 numtrec = i / TP_BSIZE;
1379 * Handle read error.
1382 fprintf(stderr, "Tape read error while ");
1383 switch (curfile.action) {
1385 fprintf(stderr, "trying to set up tape\n");
1388 fprintf(stderr, "trying to resynchronize\n");
1391 fprintf(stderr, "restoring %s\n", curfile.name);
1394 fprintf(stderr, "skipping over inode %lu\n",
1395 (unsigned long)curfile.ino);
1398 if (!yflag && !reply("continue"))
1400 i = ntrec * TP_BSIZE;
1401 memset(tapebuf, 0, (size_t)i);
1404 seek_failed = (rmtseek(i, 1) < 0);
1407 seek_failed = (LSEEK(mt, i, SEEK_CUR) == (off_t)-1);
1410 warn("continuation failed");
1411 if (!yflag && !reply("assume end-of-tape and continue"))
1417 * Handle end of tape.
1420 Vprintf(stdout, "End-of-tape encountered\n");
1429 if (rd % TP_BSIZE != 0)
1430 panic("partial block read: %d should be %d\n",
1431 rd, ntrec * TP_BSIZE);
1433 memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE);
1436 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1444 * Read a compressed format block from a file or pipe and uncompress it.
1445 * Attempt to handle read errors, and end of file.
1448 readtape_comprfile(char *buf)
1450 long rl, size, i, ret;
1452 struct tapebuf *tpb;
1454 if (blkcnt < numtrec) {
1455 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1460 /* need to read the next block */
1462 for (i = 0; i < ntrec; i++)
1463 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1465 tpb = (struct tapebuf *) tapebuf;
1467 /* read the block prefix */
1468 ret = read_a_block(mt, tapebuf, PREFIXSIZE, &rl);
1474 if (size > bufsize) {
1475 /* something's wrong */
1476 Vprintf(stdout, "Prefix size error, max size %d, got %ld\n",
1479 tpb->length = bufsize;
1481 ret = read_a_block(mt, tpb->buf, size, &rl);
1485 tbufptr = decompress_tapebuf(tpb, rl + PREFIXSIZE);
1486 if (tbufptr == NULL) {
1487 msg_read_error("File decompression error while");
1488 if (!yflag && !reply("continue"))
1490 memset(tapebuf, 0, bufsize);
1495 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1501 /* Errors while reading from a file or pipe are catastrophic. Since
1502 * there are no block boundaries, it's impossible to bypass the
1503 * block in error and find the start of the next block.
1506 /* It's possible to have multiple input files using -M
1507 * and -f file1,file2...
1509 Vprintf(stdout, "End-of-File encountered\n");
1519 msg_read_error("Read error while");
1520 /* if (!yflag && !reply("continue")) */
1525 * Read compressed data from a tape and uncompress it.
1526 * Handle read errors, and end of media.
1527 * Since a tape consists of separate physical blocks, we try
1528 * to recover from errors by repositioning the tape to the next
1532 readtape_comprtape(char *buf)
1536 struct tapebuf *tpb;
1539 if (blkcnt < numtrec) {
1540 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1545 /* need to read the next block */
1547 for (i = 0; i < ntrec; i++)
1548 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1550 tpb = (struct tapebuf *) tapebuf;
1552 /* read the block */
1553 size = bufsize + PREFIXSIZE;
1554 ret = read_a_block(mt, tapebuf, size, &rl);
1558 tbufptr = decompress_tapebuf(tpb, rl);
1559 if (tbufptr == NULL) {
1560 msg_read_error("Tape decompression error while");
1561 if (!yflag && !reply("continue"))
1563 memset(tapebuf, 0, PREFIXSIZE + bufsize);
1569 /* Handle errors: EOT switches to the next volume, other errors
1570 * attempt to position the tape to the next block.
1573 Vprintf(stdout, "End-of-tape encountered\n");
1582 msg_read_error("Tape read error while");
1583 if (!yflag && !reply("continue"))
1585 memset(tapebuf, 0, PREFIXSIZE + bufsize);
1590 rl = rmtioctl(MTFSR, 1);
1596 rl = ioctl(mt, MTIOCTOP, &tcom);
1600 warn("continuation failed");
1601 if (!yflag && !reply("assume end-of-tape and continue"))
1603 ret = 0; /* end of tape */
1609 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1615 * Decompress a struct tapebuf into a buffer. readsize is the size read
1616 * from the tape/file and is used for error messages. Returns a pointer
1617 * to the location of the uncompressed buffer or NULL on errors.
1618 * Adjust numtrec and complain for a short block.
1621 decompress_tapebuf(struct tapebuf *tpbin, int readsize)
1623 /* If zflag is on, all blocks have a struct tapebuf prefix */
1624 /* zflag gets set in setup() from the dump header */
1625 int cresult, blocklen;
1626 unsigned long worklen;
1627 char *output = NULL,*reason = NULL, *lengtherr = NULL;
1629 /* build a length error message */
1630 blocklen = tpbin->length;
1631 if (readsize < blocklen + PREFIXSIZE)
1632 lengtherr = "short";
1634 if (readsize > blocklen + PREFIXSIZE)
1639 if (tpbin->compressed) {
1640 /* uncompress whatever we read, if it fails, complain later */
1641 cresult = uncompress(comprbuf, &worklen, tpbin->buf, blocklen);
1645 output = tpbin->buf;
1650 numtrec = worklen / TP_BSIZE;
1651 if (worklen % TP_BSIZE != 0)
1652 reason = "length mismatch";
1655 reason = "not enough memory";
1658 reason = "buffer too small";
1661 reason = "data error";
1668 fprintf(stderr, "%s compressed block: %d expected: %d\n",
1669 lengtherr, readsize, tpbin->length + PREFIXSIZE);
1670 fprintf(stderr, "decompression error, block %ld: %s\n",
1671 tpblksread+1, reason);
1672 if (cresult != Z_OK) output = NULL;
1678 * Print an error message for a read error.
1679 * This was exteracted from the original readtape().
1682 msg_read_error(char *m)
1684 switch (curfile.action) {
1686 fprintf(stderr, "%s trying to set up tape\n", m);
1689 fprintf(stderr, "%s trying to resynchronize\n", m);
1692 fprintf(stderr, "%s restoring %s\n", m, curfile.name);
1695 fprintf(stderr, "%s skipping over inode %lu\n", m,
1696 (unsigned long)curfile.ino);
1700 #endif /* HAVE_ZLIB */
1703 * Read the first block and set the blocksize from its length. Test
1704 * if the block looks like a compressed dump tape. setup() will make
1705 * the final determination by checking the compressed flag if gethead()
1706 * finds a valid header. The test here is necessary to offset the buffer
1707 * by the size of the compressed prefix. zflag is set here so that
1708 * readtape_set can set the correct function pointer for readtape().
1709 * Note that the first block of each tape/file will not be compressed.
1712 findtapeblksize(void)
1716 struct tapebuf *tpb = (struct tapebuf *) tapebuf;
1717 struct s_spcl *spclpt = (struct s_spcl *) tpb->buf;
1719 for (i = 0; i < ntrec; i++)
1720 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1724 * For a pipe or file, read in the first record. For a tape, read
1727 if (magtapein == 1) /* fixed blocksize tape, not compressed */
1728 len = ntrec * TP_BSIZE;
1729 else if (magtapein == 2)/* variable blocksize tape */
1730 len = bufsize + PREFIXSIZE;
1731 else /* not mag tape */
1734 if (read_a_block(mt, tapebuf, len, &i) <= 0)
1735 errx(1, "Tape read error on first record");
1738 * If the input is from a file or a pipe, we read TP_BSIZE
1739 * bytes looking for a compressed dump header, we then
1740 * need to read in the rest of the record, as determined by
1741 * tpb->length or bufsize. The first block of the dump is
1742 * guaranteed to not be compressed so we look at the header.
1745 if (tpb->length % TP_BSIZE == 0
1746 && tpb->length <= bufsize
1747 && tpb->compressed == 0
1748 && spclpt->c_type == TS_TAPE
1749 && spclpt->c_flags & DR_COMPRESSED) {
1750 /* Looks like it's a compressed dump block prefix, */
1751 /* read in the rest of the block based on tpb->length. */
1752 len = tpb->length - TP_BSIZE + PREFIXSIZE;
1753 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) <= 0
1755 errx(1,"Error reading dump file header");
1757 numtrec = ntrec = tpb->length / TP_BSIZE;
1761 /* read in the rest of the block based on bufsize */
1762 len = bufsize - TP_BSIZE;
1763 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) < 0
1764 || (i != len && i % TP_BSIZE != 0))
1765 errx(1,"Error reading dump file header");
1769 Vprintf(stdout, "Input block size is %ld\n", ntrec);
1774 * If the input is a variable block size tape, we tried to
1775 * read PREFIXSIZE + ntrec * TP_BSIZE bytes.
1776 * If it's not a compressed dump tape or the value of ntrec is
1777 * too large, we have read less than * what we asked for;
1778 * adjust the value of ntrec and test for * a compressed dump
1782 if (i % TP_BSIZE != 0) {
1783 if (i % TP_BSIZE == PREFIXSIZE
1784 && tpb->compressed == 0
1785 && spclpt->c_type == TS_TAPE
1786 && spclpt->c_flags & DR_COMPRESSED) {
1790 if (tpb->length > bufsize)
1791 errx(1, "Tape blocksize is too large, use "
1792 "\'-b %d\' ", tpb->length / TP_BSIZE);
1795 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
1798 ntrec = i / TP_BSIZE;
1800 Vprintf(stdout, "Tape block size is %ld\n", ntrec);
1804 * Read a block of data handling all of the messy details.
1806 static int read_a_block(int fd, char *buf, size_t len, long *lengthread)
1814 i = rmtread(buf, size);
1817 i = read(fd, buf, size);
1820 break; /* EOD or error */
1823 break; /* block at a time for mt */
1826 *lengthread = len - size;
1845 * Read the next block from the tape.
1846 * Check to see if it is one of several vintage headers.
1847 * If it is an old style header, convert it to a new style header.
1848 * If it is not any valid header, return an error.
1851 gethead(struct s_spcl *buf)
1859 char dummy[TP_BSIZE];
1866 u_int16_t c_inumber;
1871 u_int16_t odi_nlink;
1887 readtape((char *)buf);
1888 if (buf->c_magic != NFS_MAGIC) {
1889 if (swabi(buf->c_magic) != NFS_MAGIC)
1892 Vprintf(stdout, "Note: Doing Byte swapping\n");
1896 if (checksum((int *)buf) == FAIL)
1899 swabst((u_char *)"8i4s31i528bi192b2i", (u_char *)buf);
1902 readtape((char *)(&u_ospcl.s_ospcl));
1903 memset((char *)buf, 0, (long)TP_BSIZE);
1904 buf->c_type = u_ospcl.s_ospcl.c_type;
1905 buf->c_date = u_ospcl.s_ospcl.c_date;
1906 buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
1907 buf->c_volume = u_ospcl.s_ospcl.c_volume;
1908 buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
1909 buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
1910 buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
1911 buf->c_magic = u_ospcl.s_ospcl.c_magic;
1912 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
1913 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
1914 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
1915 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
1916 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
1917 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
1919 buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime;
1920 buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime;
1921 buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime;
1922 #else /* __linux__ */
1923 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
1924 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
1925 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
1926 #endif /* __linux__ */
1927 buf->c_count = u_ospcl.s_ospcl.c_count;
1928 memmove(buf->c_addr, u_ospcl.s_ospcl.c_addr, (long)256);
1929 if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC ||
1930 checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
1932 buf->c_magic = NFS_MAGIC;
1935 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
1936 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
1937 qcvt.qval = buf->c_dinode.di_size;
1938 if (qcvt.val[0] || qcvt.val[1]) {
1939 printf("Note: Doing Quad swapping\n");
1944 qcvt.qval = buf->c_dinode.di_size;
1946 qcvt.val[1] = qcvt.val[0];
1948 buf->c_dinode.di_size = qcvt.qval;
1952 switch (buf->c_type) {
1957 * Have to patch up missing information in bit map headers
1960 buf->c_dinode.di_size = buf->c_count * TP_BSIZE;
1961 if (buf->c_count > TP_NINDIR)
1964 for (i = 0; i < buf->c_count; i++)
1969 if ((buf->c_flags & DR_NEWINODEFMT) == 0)
1981 panic("gethead: unknown inode type %d\n", buf->c_type);
1985 * If we are restoring a filesystem with old format inodes,
1986 * copy the uid/gid to the new location.
1989 buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
1990 buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
1998 * Check that a header is where it belongs and predict the next header
2001 accthdr(struct s_spcl *header)
2003 static dump_ino_t previno = 0x7fffffff;
2004 static int prevtype;
2005 static long predict;
2008 if (header->c_type == TS_TAPE) {
2009 fprintf(stderr, "Volume header (%s inode format) ",
2010 oldinofmt ? "old" : "new");
2011 if (header->c_firstrec)
2012 fprintf(stderr, "begins with record %d",
2013 header->c_firstrec);
2014 fprintf(stderr, "\n");
2015 previno = 0x7fffffff;
2018 if (previno == 0x7fffffff)
2022 fprintf(stderr, "Dumped inodes map header");
2025 fprintf(stderr, "Used inodes map header");
2028 fprintf(stderr, "File header, ino %lu", (unsigned long)previno);
2031 fprintf(stderr, "File continuation header, ino %ld", (long)previno);
2034 fprintf(stderr, "End of tape header");
2037 if (predict != blksread - 1)
2038 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
2039 predict, blksread - 1);
2040 fprintf(stderr, "\n");
2043 if (header->c_type != TS_END)
2044 for (i = 0; i < header->c_count; i++)
2045 if (readmapflag || header->c_addr[i] != 0)
2049 prevtype = header->c_type;
2050 previno = header->c_inumber;
2054 * Find an inode header.
2055 * Complain if had to skip, and complain is set.
2058 findinode(struct s_spcl *header)
2060 static long skipcnt = 0;
2064 curfile.name = "<name unknown>";
2065 curfile.action = UNKNOWN;
2069 if (header->c_magic != NFS_MAGIC) {
2071 while (gethead(header) == FAIL ||
2072 header->c_date != dumpdate)
2075 switch (header->c_type) {
2079 * Skip up to the beginning of the next record
2081 for (i = 0; i < header->c_count; i++)
2082 if (header->c_addr[i])
2084 while (gethead(header) == FAIL ||
2085 header->c_date != dumpdate)
2090 curfile.dip = &header->c_dinode;
2091 curfile.ino = header->c_inumber;
2095 curfile.ino = maxino;
2099 curfile.name = "<file removal list>";
2103 curfile.name = "<file dump list>";
2107 panic("unexpected tape header\n");
2111 panic("unknown tape header type %d\n", spcl.c_type);
2115 } while (header->c_type == TS_ADDR);
2120 fprintf(stderr, "resync restore, skipped %ld blocks\n",
2130 j = sizeof(union u_spcl) / sizeof(int);
2137 /* What happens if we want to read restore tapes
2138 for a 16bit int machine??? */
2144 if (i != CHECKSUM) {
2145 fprintf(stderr, "Checksum error %o, inode %lu file %s\n", i,
2146 (unsigned long)curfile.ino, curfile.name);
2156 #include <varargs.h>
2161 msg(const char *fmt, ...)
2174 (void)vfprintf(stderr, fmt, ap);
2177 #endif /* RRESTORE */
2180 swab16(u_char *sp, int n)
2185 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
2192 swab32(u_char *sp, int n)
2197 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
2198 c = sp[1]; sp[1] = sp[2]; sp[2] = c;
2205 swab64(u_char *sp, int n)
2210 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
2211 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
2212 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
2213 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
2220 swabst(u_char *cp, u_char *sp)
2226 case '0': case '1': case '2': case '3': case '4':
2227 case '5': case '6': case '7': case '8': case '9':
2228 n = (n * 10) + (*cp++ - '0');
2231 case 's': case 'w': case 'h':
2249 default: /* Any other character, like 'b' counts as byte. */
2263 swabst((u_char *)"i", (u_char *)&x);
2271 swabst((u_char *)"l", (u_char *)&x);
2278 * get the current position of the tape
2281 GetTapePos(long *pos)
2286 if (ioctl(mt, MTIOCPOS, pos) == -1) {
2288 fprintf(stdout, "[%ld] error: %d (getting tapepos: %ld)\n",
2289 (unsigned long)getpid(), err, *pos);
2295 typedef struct mt_pos {
2298 } MTPosRec, *MTPosPtr;
2301 * go to specified position on tape
2304 GotoTapePos(long pos)
2311 if (ioctl(mt, MTIOCTOP, &buf) == -1) {
2313 fprintf(stdout, "[%ld] error: %d (setting tapepos: %ld)\n",
2314 (unsigned long)getpid(), err, pos);
2321 * read next data from tape to re-sync
2324 ReReadFromTape(void)
2328 if (gethead(&spcl) == FAIL) {
2330 fprintf(stdout, "DEBUG 1 gethead failed\n");
2338 RequestVol(long tnum)
2343 #endif /* USE_QFA */