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 1.27 2001/03/19 13:22:49 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"
85 static long fssize = MAXBSIZE;
87 static int pipein = 0;
88 static int magtapein = 0; /* input is from magtape */
89 static char magtape[MAXPATHLEN];
90 static char magtapeprefix[MAXPATHLEN];
93 static char *tapebuf; /* input buffer for read */
94 static int bufsize; /* buffer size without prefix */
95 static char *tbufptr = NULL; /* active tape buffer */
97 static char *comprbuf; /* uncompress work buf */
98 static size_t comprlen; /* size including prefix */
100 static union u_spcl endoftapemark;
101 static long blksread; /* blocks read since last header */
102 static long tpblksread = 0; /* TP_BSIZE blocks read */
103 static long tapesread;
104 static sigjmp_buf restart;
105 static int gettingfile = 0; /* restart has a valid frame */
106 static char *host = NULL;
110 static char lnkbuf[MAXPATHLEN + 1];
113 int oldinofmt; /* old inode format conversion required */
114 int Bcvt; /* Swap Bytes (for CCI or sun) */
115 static int Qcvt; /* Swap quads (for sun) */
117 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
119 static void accthdr __P((struct s_spcl *));
120 static int checksum __P((int *));
121 static void findinode __P((struct s_spcl *));
122 static void findtapeblksize __P((void));
123 static int gethead __P((struct s_spcl *));
124 static void readtape __P((char *));
125 static void setdumpnum __P((void));
126 static u_int swabi __P((u_int));
128 static u_long swabl __P((u_long));
130 static u_char *swab64 __P((u_char *, int));
131 static u_char *swab32 __P((u_char *, int));
132 static u_char *swab16 __P((u_char *, int));
133 static void terminateinput __P((void));
134 static void xtrfile __P((char *, size_t));
135 static void xtrlnkfile __P((char *, size_t));
136 static void xtrlnkskip __P((char *, size_t));
137 static void xtrmap __P((char *, size_t));
138 static void xtrmapskip __P((char *, size_t));
139 static void xtrskip __P((char *, size_t));
142 static void newcomprbuf __P((long));
143 static void readtape_set __P((char *));
144 static void readtape_uncompr __P((char *));
145 static void readtape_comprfile __P((char *));
146 static void readtape_comprtape __P((char *));
147 static char *decompress_tapebuf __P((struct tapebuf *, int));
148 static void msg_read_error __P((char *));
150 static int read_a_block __P((int, void *, size_t, long *));
151 #define PREFIXSIZE sizeof(struct tapebuf)
153 #define COMPARE_ONTHEFLY 1
156 static int ifile; /* input file for compare */
157 static int cmperror; /* compare error */
158 static void xtrcmpfile __P((char *, size_t));
159 static void xtrcmpskip __P((char *, size_t));
162 static int readmapflag;
165 * Set up an input source. This is called from main.c before setup() is.
168 setinput(char *source)
174 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
178 if (strchr(source, ':')) {
180 source = strchr(host, ':');
182 if (rmthost(host) == 0)
186 if (strcmp(source, "-") == 0) {
188 * Since input is coming from a pipe we must establish
189 * our own connection to the terminal.
191 terminal = fopen(_PATH_TTY, "r");
192 if (terminal == NULL) {
193 warn("cannot open %s", _PATH_TTY);
194 terminal = fopen(_PATH_DEVNULL, "r");
195 if (terminal == NULL)
196 err(1, "cannot open %s", _PATH_DEVNULL);
200 setuid(getuid()); /* no longer need or want root privileges */
202 strncpy(magtapeprefix, source, MAXPATHLEN);
203 magtapeprefix[MAXPATHLEN-1] = '\0';
204 snprintf(magtape, MAXPATHLEN, "%s%03d", source, 1);
207 strncpy(magtape, source, MAXPATHLEN);
208 magtape[MAXPATHLEN - 1] = '\0';
212 newtapebuf(long size)
214 static int tapebufsize = -1;
217 bufsize = ntrec * TP_BSIZE;
218 if (size <= tapebufsize)
222 tapebuf = malloc(size * TP_BSIZE + sizeof(struct tapebuf));
224 errx(1, "Cannot allocate space for tape buffer");
230 newcomprbuf(long size)
232 if (size <= comprlen)
234 comprlen = size + sizeof(struct tapebuf);
235 if (comprbuf != NULL)
237 comprbuf = malloc(comprlen);
238 if (comprbuf == NULL)
239 errx(1, "Cannot allocate space for decompress buffer");
241 #endif /* HAVE_ZLIB */
244 * Verify that the tape drive can be accessed and
245 * that it actually is a dump tape.
252 struct mtget mt_stat;
254 Vprintf(stdout, "Verify tape and initialize maps\n");
257 mt = rmtopen(magtape, 0);
263 mt = open(magtape, O_RDONLY, 0);
265 err(1, "%s", magtape);
268 /* need to know if input is really from a tape */
271 magtapein = rmtioctl(MTNOP, 1) != -1;
274 magtapein = ioctl(mt, MTIOCGET, (char *) &mt_stat) == 0;
277 Vprintf(stdout,"Input is from %s\n", magtapein? "tape": "file/pipe");
281 if (gethead(&spcl) == FAIL) {
282 blkcnt--; /* push back this block */
286 if (gethead(&spcl) == FAIL)
287 errx(1, "Tape is not a dump tape");
288 fprintf(stderr, "Converting to new file system format.\n");
292 fprintf(stderr, "Dump tape is compressed.\n");
294 newcomprbuf(bufsize);
296 errx(1,"This restore version doesn't support decompression");
297 #endif /* HAVE_ZLIB */
300 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC;
301 endoftapemark.s_spcl.c_type = TS_END;
302 ip = (int *)&endoftapemark;
303 j = sizeof(union u_spcl) / sizeof(int);
308 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
310 if (vflag || command == 't' || command == 'C')
312 if (filesys[0] == '\0') {
314 strncpy(filesys, spcl.c_filesys, NAMELEN);
315 filesys[NAMELEN - 1] = '\0';
316 dirptr = strstr(filesys, " (dir");
320 dumptime = spcl.c_ddate;
321 dumpdate = spcl.c_date;
322 if (stat(".", &stbuf) < 0)
323 err(1, "cannot stat .");
324 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
326 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
327 fssize = stbuf.st_blksize;
328 if (((fssize - 1) & fssize) != 0)
329 errx(1, "bad block size %ld", fssize);
330 if (spcl.c_volume != 1)
331 errx(1, "Tape is not volume 1 of the dump");
332 if (gethead(&spcl) == FAIL) {
333 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
334 panic("no header after volume mark!\n");
337 if (spcl.c_type != TS_CLRI)
338 errx(1, "Cannot find file removal list");
339 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
340 Dprintf(stdout, "maxino = %ld\n", (long)maxino);
341 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
343 errx(1, "no memory for active inode map");
345 curfile.action = USING;
346 getfile(xtrmap, xtrmapskip);
347 if (spcl.c_type != TS_BITS)
348 errx(1, "Cannot find file dump list");
349 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
350 if (map == (char *)NULL)
351 errx(1, "no memory for file dump list");
353 curfile.action = USING;
354 getfile(xtrmap, xtrmapskip);
356 * If there may be whiteout entries on the tape, pretend that the
357 * whiteout inode exists, so that the whiteout entries can be
361 SETINO(WINO, dumpmap);
365 * Prompt user to load a new dump volume.
366 * "Nextvol" is the next suggested volume to use.
367 * This suggested volume is enforced when doing full
368 * or incremental restores, but can be overridden by
369 * the user when only extracting a subset of the files.
374 long newvol = 0, savecnt = 0, wantnext = 0, i;
375 union u_spcl tmpspcl;
376 # define tmpbuf tmpspcl.s_spcl
386 panic("Changing volumes on pipe input?\n");
394 exit(1); /* pipes do not get a second chance */
395 if (command == 'R' || command == 'r' || curfile.action != SKIP) {
402 while (newvol <= 0) {
403 if (tapesread == 0) {
404 fprintf(stderr, "%s%s%s%s%s",
405 "You have not read any tapes yet.\n",
406 "Unless you know which volume your",
407 " file(s) are on you should start\n",
408 "with the last volume and work",
409 " towards the first.\n");
411 fprintf(stderr, "You have read volumes");
413 for (i = 1; i < 32; i++)
414 if (tapesread & (1 << i)) {
415 fprintf(stderr, "%s%ld", buf, (long)i);
418 fprintf(stderr, "\n");
421 fprintf(stderr, "Specify next volume #: ");
422 (void) fflush(stderr);
423 (void) fgets(buf, TP_BSIZE, terminal);
424 } while (!feof(terminal) && buf[0] == '\n');
430 "Volume numbers are positive numerics\n");
433 if (newvol == volno) {
434 tapesread |= 1 << volno;
439 snprintf(magtape, MAXPATHLEN, "%s%03ld", magtapeprefix, newvol);
440 magtape[MAXPATHLEN - 1] = '\0';
442 if (!Mflag || haderror) {
444 fprintf(stderr, "Mount tape volume %ld\n", (long)newvol);
445 fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
446 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
447 (void) fflush(stderr);
448 (void) fgets(buf, TP_BSIZE, terminal);
451 if (!strcmp(buf, "none\n")) {
455 if (buf[0] != '\n') {
456 (void) strcpy(magtape, buf);
457 magtape[strlen(magtape) - 1] = '\0';
462 mt = rmtopen(magtape, 0);
465 mt = open(magtape, O_RDONLY, 0);
468 fprintf(stderr, "Cannot open %s\n", magtape);
477 if (gethead(&tmpbuf) == FAIL) {
478 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
479 fprintf(stderr, "tape is not dump tape\n");
484 if (tmpbuf.c_volume != volno) {
485 fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume);
490 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
492 fprintf(stderr, "Wrong dump date\n\tgot: %s",
493 ctime4(&tmpbuf.c_date));
494 fprintf(stderr, "\twanted: %s", ctime4(&dumpdate));
496 fprintf(stderr, "Wrong dump date\n\tgot: %s",
497 ctime(&tmpbuf.c_date));
498 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
504 tapesread |= 1 << volno;
507 * If continuing from the previous volume, skip over any
508 * blocks read already at the end of the previous volume.
510 * If coming to this volume at random, skip to the beginning
511 * of the next record.
513 Dprintf(stdout, "read %ld recs, tape starts with %ld\n",
514 tpblksread, (long)tmpbuf.c_firstrec);
515 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
517 tpblksread = tmpbuf.c_firstrec;
518 for (i = tmpbuf.c_count; i > 0; i--)
520 } else if (tmpbuf.c_firstrec > 0 &&
521 tmpbuf.c_firstrec < tpblksread - 1) {
523 * -1 since we've read the volume header
525 i = tpblksread - tmpbuf.c_firstrec - 1;
526 Dprintf(stderr, "Skipping %ld duplicate record%s.\n",
527 (long)i, i > 1 ? "s" : "");
532 if (curfile.action == USING) {
534 panic("active file into volume 1\n");
538 * Skip up to the beginning of the next record
540 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
541 for (i = tmpbuf.c_count; i > 0; i--)
543 (void) gethead(&spcl);
547 siglongjmp(restart, 1);
552 * Handle unexpected EOF.
558 if (gettingfile && curfile.action == USING) {
559 printf("Warning: %s %s\n",
560 "End-of-input encountered while extracting", curfile.name);
562 curfile.name = "<name unknown>";
563 curfile.action = UNKNOWN;
565 curfile.ino = maxino;
568 siglongjmp(restart, 1);
573 * handle multiple dumps per tape by skipping forward to the
581 if (dumpnum == 1 || volno != 1)
584 errx(1, "Cannot have multiple dumps on pipe input");
586 tcom.mt_count = dumpnum - 1;
589 rmtioctl(MTFSF, dumpnum - 1);
592 if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0)
600 fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date));
601 fprintf(stdout, "Dumped from: %s",
602 (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate));
604 fprintf(stdout, "Dump date: %s", ctime(&spcl.c_date));
605 fprintf(stdout, "Dumped from: %s",
606 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&spcl.c_ddate));
608 if (spcl.c_host[0] == '\0')
610 fprintf(stdout, "Level %d dump of %s on %s:%s\n",
611 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
612 fprintf(stdout, "Label: %s\n", spcl.c_label);
616 extractfile(char *name)
620 struct timeval timep[2];
624 curfile.action = USING;
626 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
627 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
628 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
629 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
630 #else /* __linux__ */
631 timep[0].tv_sec = curfile.dip->di_atime;
632 timep[0].tv_usec = curfile.dip->di_atimensec / 1000;
633 timep[1].tv_sec = curfile.dip->di_mtime;
634 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000;
635 #endif /* __linux__ */
636 mode = curfile.dip->di_mode;
637 flags = curfile.dip->di_flags;
638 switch (mode & IFMT) {
641 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
646 Vprintf(stdout, "skipped socket %s\n", name);
652 ep = lookupname(name);
653 if (ep == NULL || ep->e_flags & EXTRACT)
654 panic("unextracted directory %s\n", name);
658 Vprintf(stdout, "extract file %s\n", name);
659 return (genliteraldir(name, curfile.ino));
664 uid_t luid = curfile.dip->di_uid;
665 gid_t lgid = curfile.dip->di_gid;
669 getfile(xtrlnkfile, xtrlnkskip);
672 "%s: zero length symbolic link (ignored)\n", name);
675 if (linkit(lnkbuf, name, SYMLINK) == FAIL)
678 (void) lchown(name, luid, lgid);
684 Vprintf(stdout, "extract fifo %s\n", name);
691 if (mkfifo(name, mode) < 0) {
692 warn("%s: cannot create fifo", name);
696 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
697 (void) chmod(name, mode);
700 (void) fsetflags(name, flags);
702 (void) chflags(name, flags);
710 Vprintf(stdout, "extract special file %s\n", name);
717 if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) {
718 warn("%s: cannot create special file", name);
722 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
723 (void) chmod(name, mode);
727 warn("%s: fsetflags called on a special file", name);
728 (void) fsetflags(name, flags);
731 (void) chflags(name, flags);
738 Vprintf(stdout, "extract file %s\n", name);
745 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC,
747 warn("%s: cannot create file", name);
751 (void) fchown(ofile, curfile.dip->di_uid, curfile.dip->di_gid);
752 (void) fchmod(ofile, mode);
755 (void) setflags(ofile, flags);
757 (void) fchflags(ofile, flags);
759 getfile(xtrfile, xtrskip);
768 * skip over bit maps on the tape
774 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
779 * skip over a file on the tape
785 curfile.action = SKIP;
786 getfile(xtrnull, xtrnull);
790 * Extract a file from the tape.
791 * When an allocated block is found it is passed to the fill function;
792 * when an unallocated block (hole) is found, a zeroed buffer is passed
793 * to the skip function.
796 getfile(void (*fill) __P((char *, size_t)), void (*skip) __P((char *, size_t)))
799 volatile int curblk = 0;
800 volatile quad_t size = spcl.c_dinode.di_size;
801 volatile int last_write_was_hole = 0;
802 quad_t origsize = size;
803 static char clearedbuf[MAXBSIZE];
804 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
807 if (spcl.c_type == TS_END)
808 panic("ran off end of tape\n");
809 if (spcl.c_magic != NFS_MAGIC)
810 panic("not at beginning of a file\n");
811 if (!gettingfile && setjmp(restart) != 0)
815 for (i = 0; i < spcl.c_count; i++) {
816 if (readmapflag || spcl.c_addr[i]) {
817 readtape(&buf[curblk++][0]);
818 if (curblk == fssize / TP_BSIZE) {
819 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
820 fssize : (curblk - 1) * TP_BSIZE + size));
822 last_write_was_hole = 0;
826 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
828 (curblk - 1) * TP_BSIZE + size));
831 (*skip)(clearedbuf, (long)(size > TP_BSIZE ?
833 last_write_was_hole = 1;
835 if ((size -= TP_BSIZE) <= 0) {
836 for (i++; i < spcl.c_count; i++)
837 if (readmapflag || spcl.c_addr[i])
842 if (gethead(&spcl) == GOOD && size > 0) {
843 if (spcl.c_type == TS_ADDR)
846 "Missing address (header) block for %s at %ld blocks\n",
847 curfile.name, (long)blksread);
850 (*fill)((char *)buf, (size_t)(curblk * TP_BSIZE) + size);
851 last_write_was_hole = 0;
853 if (last_write_was_hole) {
854 ftruncate(ofile, origsize);
861 * Write out the next block of a file.
864 xtrfile(char *buf, size_t size)
869 if (write(ofile, buf, (int) size) == -1)
870 err(1, "write error extracting inode %lu, name %s\nwrite",
871 (unsigned long)curfile.ino, curfile.name);
875 * Skip over a hole in a file.
879 xtrskip(char *buf, size_t size)
882 if (lseek(ofile, (off_t)size, SEEK_CUR) == -1)
883 err(1, "seek error extracting inode %lu, name %s\nlseek",
884 (unsigned long)curfile.ino, curfile.name);
888 * Collect the next block of a symbolic link.
891 xtrlnkfile(char *buf, size_t size)
895 if (pathlen > MAXPATHLEN)
896 errx(1, "symbolic link name: %s->%s%s; too long %d",
897 curfile.name, lnkbuf, buf, pathlen);
898 (void) strcat(lnkbuf, buf);
902 * Skip over a hole in a symbolic link (should never happen).
906 xtrlnkskip(char *buf, size_t size)
909 errx(1, "unallocated block in symbolic link %s", curfile.name);
913 * Collect the next block of a bit map.
916 xtrmap(char *buf, size_t size)
919 memmove(map, buf, size);
924 * Skip over a hole in a bit map (should never happen).
928 xtrmapskip(char *buf, size_t size)
931 panic("hole in map\n");
936 * Noop, when an extraction function is not needed.
940 xtrnull(char *buf, size_t size)
948 * Compare the next block of a file.
951 xtrcmpfile(char *buf, size_t size)
953 static char cmpbuf[MAXBSIZE];
958 if (read(ifile, cmpbuf, size) != size) {
959 fprintf(stderr, "%s: size has changed.\n",
965 if (memcmp(buf, cmpbuf, size) != 0) {
966 fprintf(stderr, "%s: tape and disk copies are different\n",
974 * Skip over a hole in a file.
977 xtrcmpskip(char *buf, size_t size)
979 static char cmpbuf[MAXBSIZE];
985 if (read(ifile, cmpbuf, size) != size) {
986 fprintf(stderr, "%s: size has changed.\n",
992 for (i = 0; i < size; ++i)
993 if (cmpbuf[i] != '\0') {
994 fprintf(stderr, "%s: tape and disk copies are different\n",
1000 #endif /* COMPARE_ONTHEFLY */
1002 #if !COMPARE_ONTHEFLY
1004 do_cmpfiles(int fd_tape, int fd_disk, long size)
1006 static char buf_tape[BUFSIZ];
1007 static char buf_disk[BUFSIZ];
1012 if ((n_tape = read(fd_tape, buf_tape, sizeof(buf_tape))) < 1) {
1013 close(fd_tape), close(fd_disk);
1014 panic("do_cmpfiles: unexpected EOF[1]");
1016 if ((n_disk = read(fd_disk, buf_disk, sizeof(buf_tape))) < 1) {
1017 close(fd_tape), close(fd_disk);
1018 panic("do_cmpfiles: unexpected EOF[2]");
1020 if (n_tape != n_disk) {
1021 close(fd_tape), close(fd_disk);
1022 panic("do_cmpfiles: sizes different!");
1024 if (memcmp(buf_tape, buf_disk, (size_t)n_tape) != 0) return (1);
1030 /* for debugging compare problems */
1031 #undef COMPARE_FAIL_KEEP_FILE
1034 #ifdef COMPARE_FAIL_KEEP_FILE
1035 /* return true if tapefile should be unlinked after compare */
1040 cmpfiles(char *tapefile, char *diskfile, struct stat *sbuf_disk)
1042 struct stat sbuf_tape;
1043 int fd_tape, fd_disk;
1045 if (stat(tapefile, &sbuf_tape) != 0) {
1046 panic("Can't lstat tmp file %s: %s\n", tapefile,
1051 if (sbuf_disk->st_size != sbuf_tape.st_size) {
1053 "%s: size changed from %ld to %ld.\n",
1054 diskfile, (long)sbuf_tape.st_size, (long)sbuf_disk->st_size);
1056 #ifdef COMPARE_FAIL_KEEP_FILE
1063 if ((fd_tape = open(tapefile, O_RDONLY)) < 0) {
1064 panic("Can't open %s: %s\n", tapefile, strerror(errno));
1067 if ((fd_disk = open(diskfile, O_RDONLY)) < 0) {
1069 panic("Can't open %s: %s\n", diskfile, strerror(errno));
1073 if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) {
1074 fprintf(stderr, "%s: tape and disk copies are different\n",
1079 #ifdef COMPARE_FAIL_KEEP_FILE
1080 /* rename the file to live in /tmp */
1081 /* rename `tapefile' to /tmp/<basename of diskfile> */
1083 char *p = strrchr(diskfile, '/');
1084 char newname[MAXPATHLEN];
1086 panic("can't find / in %s\n", diskfile);
1088 snprintf(newname, sizeof(newname), "%s/debug/%s", tmpdir, p + 1);
1089 if (rename(tapefile, newname)) {
1090 panic("rename from %s to %s failed: %s\n",
1094 fprintf(stderr, "*** %s saved to %s\n",
1099 /* don't unlink the file (it's not there anymore */
1108 #ifdef COMPARE_FAIL_KEEP_FILE
1112 #endif /* !COMPARE_ONTHEFLY */
1114 #if !COMPARE_ONTHEFLY
1115 static char tmpfilename[MAXPATHLEN];
1119 comparefile(char *name)
1124 #if !COMPARE_ONTHEFLY
1125 static char *tmpfile = NULL;
1129 if ((r = lstat(name, &sb)) != 0) {
1130 warn("%s: does not exist (%d)", name, r);
1136 curfile.name = name;
1137 curfile.action = USING;
1138 mode = curfile.dip->di_mode;
1140 Vprintf(stdout, "comparing %s (size: %ld, mode: 0%o)\n", name,
1141 (long)sb.st_size, mode);
1143 if (sb.st_mode != mode) {
1144 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
1145 name, mode & 07777, sb.st_mode & 07777);
1148 switch (mode & IFMT) {
1162 char lbuf[MAXPATHLEN + 1];
1165 if (!(sb.st_mode & S_IFLNK)) {
1166 fprintf(stderr, "%s: is no longer a symbolic link\n",
1173 getfile(xtrlnkfile, xtrlnkskip);
1176 "%s: zero length symbolic link (ignored)\n",
1181 if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) {
1182 panic("readlink of %s failed: %s", name,
1187 if (strcmp(lbuf, lnkbuf) != 0) {
1189 "%s: symbolic link changed from %s to %s.\n",
1190 name, lnkbuf, lbuf);
1199 if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) {
1200 fprintf(stderr, "%s: no longer a special file\n",
1207 if (sb.st_rdev != (int)curfile.dip->di_rdev) {
1209 "%s: device changed from %d,%d to %d,%d.\n",
1211 ((int)curfile.dip->di_rdev >> 8) & 0xff,
1212 (int)curfile.dip->di_rdev & 0xff,
1213 ((int)sb.st_rdev >> 8) & 0xff,
1214 (int)sb.st_rdev & 0xff);
1221 #if COMPARE_ONTHEFLY
1222 if ((ifile = open(name, O_RDONLY)) < 0) {
1223 panic("Can't open %s: %s\n", name, strerror(errno));
1229 getfile(xtrcmpfile, xtrcmpskip);
1232 if (read(ifile, &c, 1) != 0) {
1233 fprintf(stderr, "%s: size has changed.\n",
1243 if (tmpfile == NULL) {
1244 /* argument to mktemp() must not be in RO space: */
1245 snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir);
1246 tmpfile = mktemp(&tmpfilename[0]);
1248 if ((stat(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) {
1249 panic("cannot delete tmp file %s: %s\n",
1250 tmpfile, strerror(errno));
1252 if ((ofile = creat(tmpfile, 0600)) < 0) {
1253 panic("cannot create file temp file %s: %s\n",
1254 name, strerror(errno));
1256 getfile(xtrfile, xtrskip);
1257 (void) close(ofile);
1258 #ifdef COMPARE_FAIL_KEEP_FILE
1259 if (cmpfiles(tmpfile, name, &sb))
1262 cmpfiles(tmpfile, name, &sb);
1265 #endif /* COMPARE_ONTHEFLY */
1272 static void (*readtape_func)(char *) = readtape_set;
1275 * Read TP_BSIZE blocks from the input.
1276 * Handle read errors, and end of media.
1277 * Decompress compressed blocks.
1282 (*readtape_func)(buf); /* call the actual processing routine */
1286 * Set function pointer for readtape() routine. zflag and magtapein must
1287 * be correctly set before the first call to readtape().
1290 readtape_set(char *buf)
1293 readtape_func = readtape_uncompr;
1296 readtape_func = readtape_comprtape;
1298 readtape_func = readtape_comprfile;
1303 #endif /* HAVE_ZLIB */
1306 * This is the original readtape(), it's used for reading uncompressed input.
1307 * Read TP_BSIZE blocks from the input.
1308 * Handle read errors, and end of media.
1312 readtape_uncompr(char *buf)
1317 ssize_t rd, newvol, i;
1318 int cnt, seek_failed;
1320 if (blkcnt < numtrec) {
1321 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1327 for (i = 0; i < ntrec; i++)
1328 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1331 cnt = ntrec * TP_BSIZE;
1338 i = rmtread(&tapebuf[rd], cnt);
1341 i = read(mt, &tapebuf[rd], cnt);
1344 * Check for mid-tape short read error.
1345 * If found, skip rest of buffer and start with the next.
1347 if (!pipein && numtrec < ntrec && i > 0) {
1348 Dprintf(stdout, "mid-media short read error.\n");
1352 * Handle partial block read.
1354 if (pipein && i == 0 && rd > 0)
1356 else if (i > 0 && i != ntrec * TP_BSIZE) {
1365 * Short read. Process the blocks read.
1367 if (i % TP_BSIZE != 0)
1369 "partial block read: %ld should be %ld\n",
1370 (long)i, ntrec * TP_BSIZE);
1371 numtrec = i / TP_BSIZE;
1375 * Handle read error.
1378 fprintf(stderr, "Tape read error while ");
1379 switch (curfile.action) {
1381 fprintf(stderr, "trying to set up tape\n");
1384 fprintf(stderr, "trying to resynchronize\n");
1387 fprintf(stderr, "restoring %s\n", curfile.name);
1390 fprintf(stderr, "skipping over inode %lu\n",
1391 (unsigned long)curfile.ino);
1394 if (!yflag && !reply("continue"))
1396 i = ntrec * TP_BSIZE;
1397 memset(tapebuf, 0, (size_t)i);
1400 seek_failed = (rmtseek(i, 1) < 0);
1403 seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1);
1406 warn("continuation failed");
1407 if (!yflag && !reply("assume end-of-tape and continue"))
1413 * Handle end of tape.
1416 Vprintf(stdout, "End-of-tape encountered\n");
1425 if (rd % TP_BSIZE != 0)
1426 panic("partial block read: %d should be %d\n",
1427 rd, ntrec * TP_BSIZE);
1429 memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE);
1432 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1440 * Read a compressed format block from a file or pipe and uncompress it.
1441 * Attempt to handle read errors, and end of file.
1444 readtape_comprfile(char *buf)
1446 long rl, size, i, ret;
1448 struct tapebuf *tpb;
1450 if (blkcnt < numtrec) {
1451 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1456 /* need to read the next block */
1458 for (i = 0; i < ntrec; i++)
1459 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1461 tpb = (struct tapebuf *) tapebuf;
1463 /* read the block prefix */
1464 ret = read_a_block(mt, tapebuf, PREFIXSIZE, &rl);
1470 if (size > bufsize) {
1471 /* something's wrong */
1472 Vprintf(stdout, "Prefix size error, max size %d, got %ld\n",
1475 tpb->length = bufsize;
1477 ret = read_a_block(mt, tpb->buf, size, &rl);
1481 tbufptr = decompress_tapebuf(tpb, rl + PREFIXSIZE);
1482 if (tbufptr == NULL) {
1483 msg_read_error("File decompression error while");
1484 if (!yflag && !reply("continue"))
1486 memset(tapebuf, 0, bufsize);
1491 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1497 /* Errors while reading from a file or pipe are catastrophic. Since
1498 * there are no block boundaries, it's impossible to bypass the
1499 * block in error and find the start of the next block.
1502 /* It's possible to have multiple input files using -M
1503 * and -f file1,file2...
1505 Vprintf(stdout, "End-of-File encountered\n");
1515 msg_read_error("Read error while");
1516 /* if (!yflag && !reply("continue")) */
1521 * Read compressed data from a tape and uncompress it.
1522 * Handle read errors, and end of media.
1523 * Since a tape consists of separate physical blocks, we try
1524 * to recover from errors by repositioning the tape to the next
1528 readtape_comprtape(char *buf)
1532 struct tapebuf *tpb;
1535 if (blkcnt < numtrec) {
1536 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1541 /* need to read the next block */
1543 for (i = 0; i < ntrec; i++)
1544 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1546 tpb = (struct tapebuf *) tapebuf;
1548 /* read the block */
1549 size = bufsize + PREFIXSIZE;
1550 ret = read_a_block(mt, tapebuf, size, &rl);
1554 tbufptr = decompress_tapebuf(tpb, rl);
1555 if (tbufptr == NULL) {
1556 msg_read_error("Tape decompression error while");
1557 if (!yflag && !reply("continue"))
1559 memset(tapebuf, 0, PREFIXSIZE + bufsize);
1565 /* Handle errors: EOT switches to the next volume, other errors
1566 * attempt to position the tape to the next block.
1569 Vprintf(stdout, "End-of-tape encountered\n");
1578 msg_read_error("Tape read error while");
1579 if (!yflag && !reply("continue"))
1581 memset(tapebuf, 0, PREFIXSIZE + bufsize);
1586 rl = rmtioctl(MTFSR, 1);
1592 rl = ioctl(mt, MTIOCTOP, &tcom);
1596 warn("continuation failed");
1597 if (!yflag && !reply("assume end-of-tape and continue"))
1599 ret = 0; /* end of tape */
1605 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1611 * Decompress a struct tapebuf into a buffer. readsize is the size read
1612 * from the tape/file and is used for error messages. Returns a pointer
1613 * to the location of the uncompressed buffer or NULL on errors.
1614 * Adjust numtrec and complain for a short block.
1617 decompress_tapebuf(struct tapebuf *tpbin, int readsize)
1619 /* If zflag is on, all blocks have a struct tapebuf prefix */
1620 /* zflag gets set in setup() from the dump header */
1621 int cresult, blocklen;
1622 unsigned long worklen;
1623 char *output = NULL,*reason = NULL, *lengtherr = NULL;
1625 /* build a length error message */
1626 blocklen = tpbin->length;
1627 if (readsize < blocklen + PREFIXSIZE)
1628 lengtherr = "short";
1630 if (readsize > blocklen + PREFIXSIZE)
1635 if (tpbin->compressed) {
1636 /* uncompress whatever we read, if it fails, complain later */
1637 cresult = uncompress(comprbuf, &worklen, tpbin->buf, blocklen);
1641 output = tpbin->buf;
1646 if (worklen != ntrec * TP_BSIZE) {
1647 /* short block, shouldn't happen, but... */
1648 reason = "length mismatch";
1649 if (worklen % TP_BSIZE == 0)
1650 numtrec = worklen / TP_BSIZE;
1654 reason = "not enough memory";
1657 reason = "buffer too small";
1660 reason = "data error";
1667 fprintf(stderr, "%s compressed block: %d expected: %d\n",
1668 lengtherr, readsize, tpbin->length + PREFIXSIZE);
1669 fprintf(stderr, "decompression error, block %ld: %s\n",
1670 tpblksread+1, reason);
1671 if (cresult != Z_OK) output = NULL;
1677 * Print an error message for a read error.
1678 * This was exteracted from the original readtape().
1681 msg_read_error(char *m)
1683 switch (curfile.action) {
1685 fprintf(stderr, "%s trying to set up tape\n", m);
1688 fprintf(stderr, "%s trying to resynchronize\n", m);
1691 fprintf(stderr, "%s restoring %s\n", m, curfile.name);
1694 fprintf(stderr, "%s skipping over inode %lu\n", m,
1695 (unsigned long)curfile.ino);
1699 #endif /* HAVE_ZLIB */
1702 * Read the first block and set the blocksize from its length. Test
1703 * if the block looks like a compressed dump tape. setup() will make
1704 * the final determination by checking the compressed flag if gethead()
1705 * finds a valid header. The test here is necessary to offset the buffer
1706 * by the size of the compressed prefix. zflag is set here so that
1707 * readtape_set can set the correct function pointer for readtape().
1708 * Note that the first block of each tape/file will not be compressed.
1711 findtapeblksize(void)
1715 struct tapebuf *tpb = (struct tapebuf *) tapebuf;
1716 struct s_spcl *spclpt = (struct s_spcl *) tpb->buf;
1718 for (i = 0; i < ntrec; i++)
1719 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1723 * For a pipe or file, read in the first record. For a tape, read
1726 len = magtapein ? bufsize + PREFIXSIZE: TP_BSIZE;
1728 if (read_a_block(mt, tapebuf, len, &i) <= 0)
1729 errx(1, "Tape read error on first record");
1732 * If the input is from a file or a pipe, we read TP_BSIZE
1733 * bytes looking for a compressed dump header, we then
1734 * need to read in the rest of the record, as determined by
1735 * tpb->length or bufsize. The first block of the dump is
1736 * guaranteed to not be compressed so we look at the header.
1739 if (tpb->length % TP_BSIZE == 0
1740 && tpb->length <= bufsize
1741 && tpb->compressed == 0
1742 && spclpt->c_type == TS_TAPE
1743 && spclpt->c_flags & DR_COMPRESSED) {
1744 /* Looks like it's a compressed dump block prefix, */
1745 /* read in the rest of the block based on tpb->length. */
1746 len = tpb->length - TP_BSIZE + PREFIXSIZE;
1747 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) <= 0
1749 errx(1,"Error reading dump file header");
1751 numtrec = ntrec = tpb->length / TP_BSIZE;
1755 /* read in the rest of the block based on bufsize */
1756 len = bufsize - TP_BSIZE;
1757 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) <= 0
1759 errx(1,"Error reading dump file header");
1763 Vprintf(stdout, "Input block size is %ld\n", ntrec);
1768 * If the input is a tape, we tried to read PREFIXSIZE +
1769 * ntrec * TP_BSIZE bytes. If it's not a compressed dump tape
1770 * or the value of ntrec is too large, we have read less than
1771 * what we asked for; adjust the value of ntrec and test for
1772 * a compressed dump tape prefix.
1775 if (i % TP_BSIZE != 0) {
1776 if (i % TP_BSIZE == PREFIXSIZE
1777 && tpb->compressed == 0
1778 && spclpt->c_type == TS_TAPE
1779 && spclpt->c_flags & DR_COMPRESSED) {
1783 if (tpb->length > bufsize)
1784 errx(1, "Tape blocksize is too large, use "
1785 "\'-b %d\' ", tpb->length / TP_BSIZE);
1788 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
1791 ntrec = i / TP_BSIZE;
1793 Vprintf(stdout, "Tape block size is %ld\n", ntrec);
1797 * Read a block of data handling all of the messy details.
1799 static int read_a_block(int fd, void *buf, size_t len, long *lengthread)
1807 i = rmtread(buf, size);
1810 i = read(fd, buf, size);
1813 break; /* EOD or error */
1816 break; /* block at a time for mt */
1819 *lengthread = len - size;
1838 * Read the next block from the tape.
1839 * Check to see if it is one of several vintage headers.
1840 * If it is an old style header, convert it to a new style header.
1841 * If it is not any valid header, return an error.
1844 gethead(struct s_spcl *buf)
1852 char dummy[TP_BSIZE];
1859 u_int16_t c_inumber;
1864 u_int16_t odi_nlink;
1880 readtape((char *)buf);
1881 if (buf->c_magic != NFS_MAGIC) {
1882 if (swabi(buf->c_magic) != NFS_MAGIC)
1885 Vprintf(stdout, "Note: Doing Byte swapping\n");
1889 if (checksum((int *)buf) == FAIL)
1892 swabst((u_char *)"8i4s31i528bi192b2i", (u_char *)buf);
1895 readtape((char *)(&u_ospcl.s_ospcl));
1896 memset((char *)buf, 0, (long)TP_BSIZE);
1897 buf->c_type = u_ospcl.s_ospcl.c_type;
1898 buf->c_date = u_ospcl.s_ospcl.c_date;
1899 buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
1900 buf->c_volume = u_ospcl.s_ospcl.c_volume;
1901 buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
1902 buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
1903 buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
1904 buf->c_magic = u_ospcl.s_ospcl.c_magic;
1905 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
1906 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
1907 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
1908 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
1909 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
1910 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
1912 buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime;
1913 buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime;
1914 buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime;
1915 #else /* __linux__ */
1916 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
1917 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
1918 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
1919 #endif /* __linux__ */
1920 buf->c_count = u_ospcl.s_ospcl.c_count;
1921 memmove(buf->c_addr, u_ospcl.s_ospcl.c_addr, (long)256);
1922 if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC ||
1923 checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
1925 buf->c_magic = NFS_MAGIC;
1928 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
1929 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
1930 qcvt.qval = buf->c_dinode.di_size;
1931 if (qcvt.val[0] || qcvt.val[1]) {
1932 printf("Note: Doing Quad swapping\n");
1937 qcvt.qval = buf->c_dinode.di_size;
1939 qcvt.val[1] = qcvt.val[0];
1941 buf->c_dinode.di_size = qcvt.qval;
1945 switch (buf->c_type) {
1950 * Have to patch up missing information in bit map headers
1953 buf->c_dinode.di_size = buf->c_count * TP_BSIZE;
1954 if (buf->c_count > TP_NINDIR)
1957 for (i = 0; i < buf->c_count; i++)
1962 if ((buf->c_flags & DR_NEWINODEFMT) == 0)
1974 panic("gethead: unknown inode type %d\n", buf->c_type);
1978 * If we are restoring a filesystem with old format inodes,
1979 * copy the uid/gid to the new location.
1982 buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
1983 buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
1991 * Check that a header is where it belongs and predict the next header
1994 accthdr(struct s_spcl *header)
1996 static ino_t previno = 0x7fffffff;
1997 static int prevtype;
1998 static long predict;
2001 if (header->c_type == TS_TAPE) {
2002 fprintf(stderr, "Volume header (%s inode format) ",
2003 oldinofmt ? "old" : "new");
2004 if (header->c_firstrec)
2005 fprintf(stderr, "begins with record %d",
2006 header->c_firstrec);
2007 fprintf(stderr, "\n");
2008 previno = 0x7fffffff;
2011 if (previno == 0x7fffffff)
2015 fprintf(stderr, "Dumped inodes map header");
2018 fprintf(stderr, "Used inodes map header");
2021 fprintf(stderr, "File header, ino %lu", (unsigned long)previno);
2024 fprintf(stderr, "File continuation header, ino %ld", (long)previno);
2027 fprintf(stderr, "End of tape header");
2030 if (predict != blksread - 1)
2031 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
2032 predict, blksread - 1);
2033 fprintf(stderr, "\n");
2036 if (header->c_type != TS_END)
2037 for (i = 0; i < header->c_count; i++)
2038 if (readmapflag || header->c_addr[i] != 0)
2042 prevtype = header->c_type;
2043 previno = header->c_inumber;
2047 * Find an inode header.
2048 * Complain if had to skip, and complain is set.
2051 findinode(struct s_spcl *header)
2053 static long skipcnt = 0;
2057 curfile.name = "<name unknown>";
2058 curfile.action = UNKNOWN;
2062 if (header->c_magic != NFS_MAGIC) {
2064 while (gethead(header) == FAIL ||
2065 header->c_date != dumpdate)
2068 switch (header->c_type) {
2072 * Skip up to the beginning of the next record
2074 for (i = 0; i < header->c_count; i++)
2075 if (header->c_addr[i])
2077 while (gethead(header) == FAIL ||
2078 header->c_date != dumpdate)
2083 curfile.dip = &header->c_dinode;
2084 curfile.ino = header->c_inumber;
2088 curfile.ino = maxino;
2092 curfile.name = "<file removal list>";
2096 curfile.name = "<file dump list>";
2100 panic("unexpected tape header\n");
2104 panic("unknown tape header type %d\n", spcl.c_type);
2108 } while (header->c_type == TS_ADDR);
2110 fprintf(stderr, "resync restore, skipped %ld blocks\n",
2120 j = sizeof(union u_spcl) / sizeof(int);
2127 /* What happens if we want to read restore tapes
2128 for a 16bit int machine??? */
2134 if (i != CHECKSUM) {
2135 fprintf(stderr, "Checksum error %o, inode %lu file %s\n", i,
2136 (unsigned long)curfile.ino, curfile.name);
2146 #include <varargs.h>
2151 msg(const char *fmt, ...)
2164 (void)vfprintf(stderr, fmt, ap);
2167 #endif /* RRESTORE */
2170 swab16(u_char *sp, int n)
2175 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
2182 swab32(u_char *sp, int n)
2187 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
2188 c = sp[1]; sp[1] = sp[2]; sp[2] = c;
2195 swab64(u_char *sp, int n)
2200 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
2201 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
2202 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
2203 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
2210 swabst(u_char *cp, u_char *sp)
2216 case '0': case '1': case '2': case '3': case '4':
2217 case '5': case '6': case '7': case '8': case '9':
2218 n = (n * 10) + (*cp++ - '0');
2221 case 's': case 'w': case 'h':
2239 default: /* Any other character, like 'b' counts as byte. */
2253 swabst((u_char *)"i", (u_char *)&x);
2261 swabst((u_char *)"l", (u_char *)&x);