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@cybercable.fr>, 1999
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
49 static char sccsid[] = "@(#)tape.c 8.9 (Berkeley) 5/1/95";
51 static const char rcsid[] =
52 "$Id: tape.c,v 1.3 1999/10/11 12:59:21 stelian Exp $";
55 #include <sys/param.h>
62 #include <linux/ext2_fs.h>
63 #include <bsdcompat.h>
65 #include <ufs/ufs/dinode.h>
66 #endif /* __linux__ */
67 #include <protocols/dumprestore.h>
70 #include <compaterr.h>
78 #include <ext2fs/ext2fs.h>
83 #include "pathnames.h"
85 static long fssize = MAXBSIZE;
87 static int pipein = 0;
92 static union u_spcl endoftapemark;
93 static long blksread; /* blocks read since last header */
94 static long tpblksread = 0; /* TP_BSIZE blocks read */
95 static long tapesread;
96 static sigjmp_buf restart;
97 static int gettingfile = 0; /* restart has a valid frame */
98 static char *host = NULL;
102 static char lnkbuf[MAXPATHLEN + 1];
105 int oldinofmt; /* old inode format conversion required */
106 int Bcvt; /* Swap Bytes (for CCI or sun) */
107 static int Qcvt; /* Swap quads (for sun) */
109 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
111 static void accthdr __P((struct s_spcl *));
112 static int checksum __P((int *));
113 static void findinode __P((struct s_spcl *));
114 static void findtapeblksize __P((void));
115 static int gethead __P((struct s_spcl *));
116 static void readtape __P((char *));
117 static void setdumpnum __P((void));
118 static u_int swabi __P((u_int));
119 static u_long swabl __P((u_long));
120 static u_char *swab64 __P((u_char *, int));
121 static u_char *swab32 __P((u_char *, int));
122 static u_char *swab16 __P((u_char *, int));
123 static void terminateinput __P((void));
124 static void xtrfile __P((char *, size_t));
125 static void xtrlnkfile __P((char *, size_t));
126 static void xtrlnkskip __P((char *, size_t));
127 static void xtrmap __P((char *, size_t));
128 static void xtrmapskip __P((char *, size_t));
129 static void xtrskip __P((char *, size_t));
131 static int readmapflag;
134 * Set up an input source
137 setinput(char *source)
143 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
147 if (strchr(source, ':')) {
149 source = strchr(host, ':');
151 if (rmthost(host) == 0)
155 if (strcmp(source, "-") == 0) {
157 * Since input is coming from a pipe we must establish
158 * our own connection to the terminal.
160 terminal = fopen(_PATH_TTY, "r");
161 if (terminal == NULL) {
162 warn("cannot open %s", _PATH_TTY);
163 terminal = fopen(_PATH_DEVNULL, "r");
164 if (terminal == NULL)
165 err(1, "cannot open %s", _PATH_DEVNULL);
169 setuid(getuid()); /* no longer need or want root privileges */
170 magtape = strdup(source);
172 errx(1, "Cannot allocate space for magtape buffer");
176 newtapebuf(long size)
178 static int tapebufsize = -1;
181 if (size <= tapebufsize)
185 tapebuf = malloc(size * TP_BSIZE);
187 errx(1, "Cannot allocate space for tape buffer");
192 * Verify that the tape drive can be accessed and
193 * that it actually is a dump tape.
201 Vprintf(stdout, "Verify tape and initialize maps\n");
204 mt = rmtopen(magtape, 0);
210 mt = open(magtape, O_RDONLY, 0);
212 err(1, "%s", magtape);
216 if (!pipein && !bflag)
218 if (gethead(&spcl) == FAIL) {
219 blkcnt--; /* push back this block */
223 if (gethead(&spcl) == FAIL)
224 errx(1, "Tape is not a dump tape");
225 fprintf(stderr, "Converting to new file system format.\n");
228 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC;
229 endoftapemark.s_spcl.c_type = TS_END;
230 ip = (int *)&endoftapemark;
231 j = sizeof(union u_spcl) / sizeof(int);
236 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
238 if (vflag || command == 't' || command == 'C')
240 if (filesys == NULL) {
241 filesys = spcl.c_filesys;
243 dumptime = spcl.c_ddate;
244 dumpdate = spcl.c_date;
245 if (stat(".", &stbuf) < 0)
246 err(1, "cannot stat .");
247 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
249 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
250 fssize = stbuf.st_blksize;
251 if (((fssize - 1) & fssize) != 0)
252 errx(1, "bad block size %ld", fssize);
253 if (spcl.c_volume != 1)
254 errx(1, "Tape is not volume 1 of the dump");
255 if (gethead(&spcl) == FAIL) {
256 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
257 panic("no header after volume mark!\n");
260 if (spcl.c_type != TS_CLRI)
261 errx(1, "Cannot find file removal list");
262 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
263 Dprintf(stdout, "maxino = %ld\n", maxino);
264 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
266 panic("no memory for active inode map\n");
268 curfile.action = USING;
269 getfile(xtrmap, xtrmapskip);
270 if (spcl.c_type != TS_BITS)
271 errx(1, "Cannot find file dump list");
272 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
273 if (map == (char *)NULL)
274 panic("no memory for file dump list\n");
276 curfile.action = USING;
277 getfile(xtrmap, xtrmapskip);
279 * If there may be whiteout entries on the tape, pretend that the
280 * whiteout inode exists, so that the whiteout entries can be
284 SETINO(WINO, dumpmap);
288 * Prompt user to load a new dump volume.
289 * "Nextvol" is the next suggested volume to use.
290 * This suggested volume is enforced when doing full
291 * or incremental restores, but can be overridden by
292 * the user when only extracting a subset of the files.
297 long newvol = 0, savecnt = 0, wantnext = 0, i;
298 union u_spcl tmpspcl;
299 # define tmpbuf tmpspcl.s_spcl
308 panic("Changing volumes on pipe input?\n");
316 exit(1); /* pipes do not get a second chance */
317 if (command == 'R' || command == 'r' || curfile.action != SKIP) {
324 while (newvol <= 0) {
325 if (tapesread == 0) {
326 fprintf(stderr, "%s%s%s%s%s",
327 "You have not read any tapes yet.\n",
328 "Unless you know which volume your",
329 " file(s) are on you should start\n",
330 "with the last volume and work",
331 " towards the first.\n");
333 fprintf(stderr, "You have read volumes");
335 for (i = 1; i < 32; i++)
336 if (tapesread & (1 << i)) {
337 fprintf(stderr, "%s%ld", buf, (long)i);
340 fprintf(stderr, "\n");
343 fprintf(stderr, "Specify next volume #: ");
344 (void) fflush(stderr);
345 (void) fgets(buf, BUFSIZ, terminal);
346 } while (!feof(terminal) && buf[0] == '\n');
352 "Volume numbers are positive numerics\n");
355 if (newvol == volno) {
356 tapesread |= 1 << volno;
360 fprintf(stderr, "Mount tape volume %ld\n", (long)newvol);
361 fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
362 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
363 (void) fflush(stderr);
364 (void) fgets(buf, BUFSIZ, terminal);
367 if (!strcmp(buf, "none\n")) {
371 if (buf[0] != '\n') {
372 (void) strcpy(magtape, buf);
373 magtape[strlen(magtape) - 1] = '\0';
377 mt = rmtopen(magtape, 0);
380 mt = open(magtape, O_RDONLY, 0);
383 fprintf(stderr, "Cannot open %s\n", magtape);
391 if (gethead(&tmpbuf) == FAIL) {
392 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
393 fprintf(stderr, "tape is not dump tape\n");
397 if (tmpbuf.c_volume != volno) {
398 fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume);
402 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
404 fprintf(stderr, "Wrong dump date\n\tgot: %s",
405 ctime4(&tmpbuf.c_date));
406 fprintf(stderr, "\twanted: %s", ctime4(&dumpdate));
408 fprintf(stderr, "Wrong dump date\n\tgot: %s",
409 ctime(&tmpbuf.c_date));
410 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
415 tapesread |= 1 << volno;
418 * If continuing from the previous volume, skip over any
419 * blocks read already at the end of the previous volume.
421 * If coming to this volume at random, skip to the beginning
422 * of the next record.
424 Dprintf(stdout, "read %ld recs, tape starts with %ld\n",
425 tpblksread, (long)tmpbuf.c_firstrec);
426 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
428 tpblksread = tmpbuf.c_firstrec;
429 for (i = tmpbuf.c_count; i > 0; i--)
431 } else if (tmpbuf.c_firstrec > 0 &&
432 tmpbuf.c_firstrec < tpblksread - 1) {
434 * -1 since we've read the volume header
436 i = tpblksread - tmpbuf.c_firstrec - 1;
437 Dprintf(stderr, "Skipping %ld duplicate record%s.\n",
438 (long)i, i > 1 ? "s" : "");
443 if (curfile.action == USING) {
445 panic("active file into volume 1\n");
449 * Skip up to the beginning of the next record
451 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
452 for (i = tmpbuf.c_count; i > 0; i--)
454 (void) gethead(&spcl);
458 siglongjmp(restart, 1);
463 * Handle unexpected EOF.
469 if (gettingfile && curfile.action == USING) {
470 printf("Warning: %s %s\n",
471 "End-of-input encountered while extracting", curfile.name);
473 curfile.name = "<name unknown>";
474 curfile.action = UNKNOWN;
476 curfile.ino = maxino;
479 siglongjmp(restart, 1);
484 * handle multiple dumps per tape by skipping forward to the
492 if (dumpnum == 1 || volno != 1)
495 errx(1, "Cannot have multiple dumps on pipe input");
497 tcom.mt_count = dumpnum - 1;
500 rmtioctl(MTFSF, dumpnum - 1);
503 if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0)
511 fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date));
512 fprintf(stdout, "Dumped from: %s",
513 (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate));
515 fprintf(stdout, "Dump date: %s", ctime(&spcl.c_date));
516 fprintf(stdout, "Dumped from: %s",
517 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&spcl.c_ddate));
519 if (spcl.c_host[0] == '\0')
521 fprintf(stderr, "Level %d dump of %s on %s:%s\n",
522 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
523 fprintf(stderr, "Label: %s\n", spcl.c_label);
527 extractfile(char *name)
531 struct timeval timep[2];
535 curfile.action = USING;
537 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
538 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
539 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
540 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
541 #else /* __linux__ */
542 timep[0].tv_sec = curfile.dip->di_atime;
543 timep[0].tv_usec = curfile.dip->di_atimensec / 1000;
544 timep[1].tv_sec = curfile.dip->di_mtime;
545 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000;
546 #endif /* __linux__ */
547 mode = curfile.dip->di_mode;
548 flags = curfile.dip->di_flags;
549 switch (mode & IFMT) {
552 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
557 Vprintf(stdout, "skipped socket %s\n", name);
563 ep = lookupname(name);
564 if (ep == NULL || ep->e_flags & EXTRACT)
565 panic("unextracted directory %s\n", name);
569 Vprintf(stdout, "extract file %s\n", name);
570 return (genliteraldir(name, curfile.ino));
573 { uid_t luid = curfile.dip->di_uid;
574 gid_t lgid = curfile.dip->di_gid;
578 getfile(xtrlnkfile, xtrlnkskip);
581 "%s: zero length symbolic link (ignored)\n", name);
584 if (linkit(lnkbuf, name, SYMLINK) == FAIL)
586 (void) chown(name, luid, lgid);
591 Vprintf(stdout, "extract fifo %s\n", name);
598 if (mkfifo(name, mode) < 0) {
599 warn("%s: cannot create fifo", name);
603 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
604 (void) chmod(name, mode);
606 (void) fsetflags(name, flags);
608 (void) chflags(name, flags);
616 Vprintf(stdout, "extract special file %s\n", name);
623 if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) {
624 warn("%s: cannot create special file", name);
628 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
629 (void) chmod(name, mode);
631 (void) fsetflags(name, flags);
633 (void) chflags(name, flags);
640 Vprintf(stdout, "extract file %s\n", name);
647 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC,
649 warn("%s: cannot create file", name);
653 (void) fchown(ofile, curfile.dip->di_uid, curfile.dip->di_gid);
654 (void) fchmod(ofile, mode);
656 (void) fsetflags(ofile, flags);
658 (void) fchflags(ofile, flags);
660 getfile(xtrfile, xtrskip);
669 * skip over bit maps on the tape
675 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
680 * skip over a file on the tape
686 curfile.action = SKIP;
687 getfile(xtrnull, xtrnull);
691 * Extract a file from the tape.
692 * When an allocated block is found it is passed to the fill function;
693 * when an unallocated block (hole) is found, a zeroed buffer is passed
694 * to the skip function.
697 getfile(void (*fill) __P((char *, size_t)), void (*skip) __P((char *, size_t)))
700 volatile int curblk = 0;
701 volatile quad_t size = spcl.c_dinode.di_size;
702 volatile int last_write_was_hole = 0;
703 quad_t origsize = size;
704 static char clearedbuf[MAXBSIZE];
705 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
708 if (spcl.c_type == TS_END)
709 panic("ran off end of tape\n");
710 if (spcl.c_magic != NFS_MAGIC)
711 panic("not at beginning of a file\n");
712 if (!gettingfile && setjmp(restart) != 0)
716 for (i = 0; i < spcl.c_count; i++) {
717 if (readmapflag || spcl.c_addr[i]) {
718 readtape(&buf[curblk++][0]);
719 if (curblk == fssize / TP_BSIZE) {
720 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
721 fssize : (curblk - 1) * TP_BSIZE + size));
723 last_write_was_hole = 0;
727 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
729 (curblk - 1) * TP_BSIZE + size));
732 (*skip)(clearedbuf, (long)(size > TP_BSIZE ?
734 last_write_was_hole = 1;
736 if ((size -= TP_BSIZE) <= 0) {
737 for (i++; i < spcl.c_count; i++)
738 if (readmapflag || spcl.c_addr[i])
743 if (gethead(&spcl) == GOOD && size > 0) {
744 if (spcl.c_type == TS_ADDR)
747 "Missing address (header) block for %s at %ld blocks\n",
748 curfile.name, (long)blksread);
751 (*fill)((char *)buf, (size_t)(curblk * TP_BSIZE) + size);
752 last_write_was_hole = 0;
754 if (last_write_was_hole) {
755 ftruncate(ofile, origsize);
762 * Write out the next block of a file.
765 xtrfile(char *buf, size_t size)
770 if (write(ofile, buf, (int) size) == -1)
771 err(1, "write error extracting inode %lu, name %s\nwrite",
772 (unsigned long)curfile.ino, curfile.name);
776 * Skip over a hole in a file.
780 xtrskip(char *buf, size_t size)
783 if (lseek(ofile, (off_t)size, SEEK_CUR) == -1)
784 err(1, "seek error extracting inode %lu, name %s\nlseek",
785 (unsigned long)curfile.ino, curfile.name);
789 * Collect the next block of a symbolic link.
792 xtrlnkfile(char *buf, size_t size)
796 if (pathlen > MAXPATHLEN)
797 errx(1, "symbolic link name: %s->%s%s; too long %d",
798 curfile.name, lnkbuf, buf, pathlen);
799 (void) strcat(lnkbuf, buf);
803 * Skip over a hole in a symbolic link (should never happen).
807 xtrlnkskip(char *buf, size_t size)
810 errx(1, "unallocated block in symbolic link %s", curfile.name);
814 * Collect the next block of a bit map.
817 xtrmap(char *buf, size_t size)
820 memmove(map, buf, size);
825 * Skip over a hole in a bit map (should never happen).
829 xtrmapskip(char *buf, size_t size)
832 panic("hole in map\n");
837 * Noop, when an extraction function is not needed.
841 xtrnull(char *buf, size_t size)
848 do_cmpfiles(int fd_tape, int fd_disk, long size)
850 static char buf_tape[BUFSIZ];
851 static char buf_disk[BUFSIZ];
856 if ((n_tape = read(fd_tape, buf_tape, sizeof(buf_tape))) < 1) {
857 close(fd_tape), close(fd_disk);
858 panic("do_cmpfiles: unexpected EOF[1]");
860 if ((n_disk = read(fd_disk, buf_disk, sizeof(buf_tape))) < 1) {
861 close(fd_tape), close(fd_disk);
862 panic("do_cmpfiles: unexpected EOF[2]");
864 if (n_tape != n_disk) {
865 close(fd_tape), close(fd_disk);
866 panic("do_cmpfiles: sizes different!");
868 if (memcmp(buf_tape, buf_disk, (size_t)n_tape) != 0) return (1);
874 /* for debugging compare problems */
875 #undef COMPARE_FAIL_KEEP_FILE
878 #ifdef COMPARE_FAIL_KEEP_FILE
879 /* return true if tapefile should be unlinked after compare */
884 cmpfiles(char *tapefile, char *diskfile, struct stat *sbuf_disk)
886 struct stat sbuf_tape;
887 int fd_tape, fd_disk;
889 if (stat(tapefile, &sbuf_tape) != 0) {
890 panic("Can't lstat tmp file %s: %s\n", tapefile,
894 if (sbuf_disk->st_size != sbuf_tape.st_size) {
896 "%s: size changed from %ld to %ld.\n",
897 diskfile, (long)sbuf_tape.st_size, (long)sbuf_disk->st_size);
898 #ifdef COMPARE_FAIL_KEEP_FILE
905 if ((fd_tape = open(tapefile, O_RDONLY)) < 0) {
906 panic("Can't open %s: %s\n", tapefile, strerror(errno));
908 if ((fd_disk = open(diskfile, O_RDONLY)) < 0) {
910 panic("Can't open %s: %s\n", diskfile, strerror(errno));
913 if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) {
914 fprintf(stderr, "%s: tape and disk copies are different\n",
918 #ifdef COMPARE_FAIL_KEEP_FILE
919 /* rename the file to live in /tmp */
920 /* rename `tapefile' to /tmp/<basename of diskfile> */
922 char *p = strrchr(diskfile, '/');
923 char newname[MAXPATHLEN];
925 panic("can't find / in %s\n", diskfile);
927 snprintf(newname, sizeof(newname), "%s/debug/%s", tmpdir, p + 1);
928 if (rename(tapefile, newname)) {
929 panic("rename from %s to %s failed: %s\n",
933 fprintf(stderr, "*** %s saved to %s\n",
938 /* don't unlink the file (it's not there anymore */
947 #ifdef COMPARE_FAIL_KEEP_FILE
952 static char tmpfilename[MAXPATHLEN];
955 comparefile(char *name)
957 static char *tmpfile = NULL;
959 struct stat sb, stemp;
962 if ((r = lstat(name, &sb)) != 0) {
963 warn("%s: does not exist (%d)", name, r);
969 curfile.action = USING;
970 mode = curfile.dip->di_mode;
972 Vprintf(stdout, "comparing %s (size: %ld, mode: 0%o)\n", name,
973 (long)sb.st_size, mode);
975 if (sb.st_mode != mode) {
976 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
977 name, mode & 07777, sb.st_mode & 07777);
979 switch (mode & IFMT) {
993 char lbuf[MAXPATHLEN + 1];
996 if (!(sb.st_mode & S_IFLNK)) {
997 fprintf(stderr, "%s: is no longer a symbolic link\n",
1003 getfile(xtrlnkfile, xtrlnkskip);
1006 "%s: zero length symbolic link (ignored)\n",
1010 if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) {
1011 panic("readlink of %s failed: %s", name,
1015 if (strcmp(lbuf, lnkbuf) != 0) {
1017 "%s: symbolic link changed from %s to %s.\n",
1018 name, lnkbuf, lbuf);
1026 if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) {
1027 fprintf(stderr, "%s: no longer a special file\n",
1033 if (sb.st_rdev != (int)curfile.dip->di_rdev) {
1035 "%s: device changed from %d,%d to %d,%d.\n",
1037 ((int)curfile.dip->di_rdev >> 8) & 0xff,
1038 (int)curfile.dip->di_rdev & 0xff,
1039 ((int)sb.st_rdev >> 8) & 0xff,
1040 (int)sb.st_rdev & 0xff);
1046 if (tmpfile == NULL) {
1047 /* argument to mktemp() must not be in RO space: */
1048 snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir);
1049 tmpfile = mktemp(&tmpfilename[0]);
1051 if ((stat(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) {
1052 panic("cannot delete tmp file %s: %s\n",
1053 tmpfile, strerror(errno));
1055 if ((ofile = creat(tmpfile, 0600)) < 0) {
1056 panic("cannot create file temp file %s: %s\n",
1057 name, strerror(errno));
1059 getfile(xtrfile, xtrskip);
1060 (void) close(ofile);
1061 #ifdef COMPARE_FAIL_KEEP_FILE
1062 if (cmpfiles(tmpfile, name, &sb))
1065 cmpfiles(tmpfile, name, &sb);
1074 * Read TP_BSIZE blocks from the input.
1075 * Handle read errors, and end of media.
1080 ssize_t rd, newvol, i;
1081 int cnt, seek_failed;
1083 if (blkcnt < numtrec) {
1084 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1089 for (i = 0; i < ntrec; i++)
1090 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1093 cnt = ntrec * TP_BSIZE;
1098 i = rmtread(&tapebuf[rd], cnt);
1101 i = read(mt, &tapebuf[rd], cnt);
1103 * Check for mid-tape short read error.
1104 * If found, skip rest of buffer and start with the next.
1106 if (!pipein && numtrec < ntrec && i > 0) {
1107 Dprintf(stdout, "mid-media short read error.\n");
1111 * Handle partial block read.
1113 if (pipein && i == 0 && rd > 0)
1115 else if (i > 0 && i != ntrec * TP_BSIZE) {
1124 * Short read. Process the blocks read.
1126 if (i % TP_BSIZE != 0)
1128 "partial block read: %ld should be %ld\n",
1129 (long)i, ntrec * TP_BSIZE);
1130 numtrec = i / TP_BSIZE;
1134 * Handle read error.
1137 fprintf(stderr, "Tape read error while ");
1138 switch (curfile.action) {
1140 fprintf(stderr, "trying to set up tape\n");
1143 fprintf(stderr, "trying to resynchronize\n");
1146 fprintf(stderr, "restoring %s\n", curfile.name);
1149 fprintf(stderr, "skipping over inode %lu\n",
1150 (unsigned long)curfile.ino);
1153 if (!yflag && !reply("continue"))
1155 i = ntrec * TP_BSIZE;
1156 memset(tapebuf, 0, (size_t)i);
1159 seek_failed = (rmtseek(i, 1) < 0);
1162 seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1);
1165 err(1, "continuation failed");
1168 * Handle end of tape.
1171 Vprintf(stdout, "End-of-tape encountered\n");
1180 if (rd % TP_BSIZE != 0)
1181 panic("partial block read: %d should be %d\n",
1182 rd, ntrec * TP_BSIZE);
1184 memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE);
1187 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1193 findtapeblksize(void)
1197 for (i = 0; i < ntrec; i++)
1198 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1202 i = rmtread(tapebuf, (size_t)(ntrec * TP_BSIZE));
1205 i = read(mt, tapebuf, (size_t)(ntrec * TP_BSIZE));
1208 err(1, "tape read error");
1209 if (i % TP_BSIZE != 0)
1210 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
1212 ntrec = i / TP_BSIZE;
1214 Vprintf(stdout, "Tape block size is %ld\n", ntrec);
1232 * Read the next block from the tape.
1233 * Check to see if it is one of several vintage headers.
1234 * If it is an old style header, convert it to a new style header.
1235 * If it is not any valid header, return an error.
1238 gethead(struct s_spcl *buf)
1246 char dummy[TP_BSIZE];
1253 u_int16_t c_inumber;
1258 u_int16_t odi_nlink;
1274 readtape((char *)buf);
1275 if (buf->c_magic != NFS_MAGIC) {
1276 if (swabi(buf->c_magic) != NFS_MAGIC)
1279 Vprintf(stdout, "Note: Doing Byte swapping\n");
1283 if (checksum((int *)buf) == FAIL)
1286 swabst((u_char *)"8i4s31i528bi192b2i", (u_char *)buf);
1289 readtape((char *)(&u_ospcl.s_ospcl));
1290 memset((char *)buf, 0, (long)TP_BSIZE);
1291 buf->c_type = u_ospcl.s_ospcl.c_type;
1292 buf->c_date = u_ospcl.s_ospcl.c_date;
1293 buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
1294 buf->c_volume = u_ospcl.s_ospcl.c_volume;
1295 buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
1296 buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
1297 buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
1298 buf->c_magic = u_ospcl.s_ospcl.c_magic;
1299 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
1300 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
1301 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
1302 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
1303 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
1304 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
1306 buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime;
1307 buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime;
1308 buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime;
1309 #else /* __linux__ */
1310 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
1311 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
1312 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
1313 #endif /* __linux__ */
1314 buf->c_count = u_ospcl.s_ospcl.c_count;
1315 memmove(buf->c_addr, u_ospcl.s_ospcl.c_addr, (long)256);
1316 if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC ||
1317 checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
1319 buf->c_magic = NFS_MAGIC;
1322 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
1323 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
1324 qcvt.qval = buf->c_dinode.di_size;
1325 if (qcvt.val[0] || qcvt.val[1]) {
1326 printf("Note: Doing Quad swapping\n");
1331 qcvt.qval = buf->c_dinode.di_size;
1333 qcvt.val[1] = qcvt.val[0];
1335 buf->c_dinode.di_size = qcvt.qval;
1339 switch (buf->c_type) {
1344 * Have to patch up missing information in bit map headers
1347 buf->c_dinode.di_size = buf->c_count * TP_BSIZE;
1348 if (buf->c_count > TP_NINDIR)
1351 for (i = 0; i < buf->c_count; i++)
1356 if ((buf->c_flags & DR_NEWINODEFMT) == 0)
1368 panic("gethead: unknown inode type %d\n", buf->c_type);
1372 * If we are restoring a filesystem with old format inodes,
1373 * copy the uid/gid to the new location.
1376 buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
1377 buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
1385 * Check that a header is where it belongs and predict the next header
1388 accthdr(struct s_spcl *header)
1390 static ino_t previno = 0x7fffffff;
1391 static int prevtype;
1392 static long predict;
1395 if (header->c_type == TS_TAPE) {
1396 fprintf(stderr, "Volume header (%s inode format) ",
1397 oldinofmt ? "old" : "new");
1398 if (header->c_firstrec)
1399 fprintf(stderr, "begins with record %d",
1400 header->c_firstrec);
1401 fprintf(stderr, "\n");
1402 previno = 0x7fffffff;
1405 if (previno == 0x7fffffff)
1409 fprintf(stderr, "Dumped inodes map header");
1412 fprintf(stderr, "Used inodes map header");
1415 fprintf(stderr, "File header, ino %lu", (unsigned long)previno);
1418 fprintf(stderr, "File continuation header, ino %ld", previno);
1421 fprintf(stderr, "End of tape header");
1424 if (predict != blksread - 1)
1425 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
1426 predict, blksread - 1);
1427 fprintf(stderr, "\n");
1430 if (header->c_type != TS_END)
1431 for (i = 0; i < header->c_count; i++)
1432 if (readmapflag || header->c_addr[i] != 0)
1436 prevtype = header->c_type;
1437 previno = header->c_inumber;
1441 * Find an inode header.
1442 * Complain if had to skip, and complain is set.
1445 findinode(struct s_spcl *header)
1447 static long skipcnt = 0;
1451 curfile.name = "<name unknown>";
1452 curfile.action = UNKNOWN;
1456 if (header->c_magic != NFS_MAGIC) {
1458 while (gethead(header) == FAIL ||
1459 header->c_date != dumpdate)
1462 switch (header->c_type) {
1466 * Skip up to the beginning of the next record
1468 for (i = 0; i < header->c_count; i++)
1469 if (header->c_addr[i])
1471 while (gethead(header) == FAIL ||
1472 header->c_date != dumpdate)
1477 curfile.dip = &header->c_dinode;
1478 curfile.ino = header->c_inumber;
1482 curfile.ino = maxino;
1486 curfile.name = "<file removal list>";
1490 curfile.name = "<file dump list>";
1494 panic("unexpected tape header\n");
1498 panic("unknown tape header type %d\n", spcl.c_type);
1502 } while (header->c_type == TS_ADDR);
1504 fprintf(stderr, "resync restore, skipped %ld blocks\n",
1514 j = sizeof(union u_spcl) / sizeof(int);
1521 /* What happens if we want to read restore tapes
1522 for a 16bit int machine??? */
1528 if (i != CHECKSUM) {
1529 fprintf(stderr, "Checksum error %o, inode %lu file %s\n", i,
1530 (unsigned long)curfile.ino, curfile.name);
1540 #include <varargs.h>
1545 msg(const char *fmt, ...)
1558 (void)vfprintf(stderr, fmt, ap);
1561 #endif /* RRESTORE */
1564 swab16(u_char *sp, int n)
1569 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
1576 swab32(u_char *sp, int n)
1581 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
1582 c = sp[1]; sp[1] = sp[2]; sp[2] = c;
1589 swab64(u_char *sp, int n)
1594 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
1595 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
1596 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
1597 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
1604 swabst(u_char *cp, u_char *sp)
1610 case '0': case '1': case '2': case '3': case '4':
1611 case '5': case '6': case '7': case '8': case '9':
1612 n = (n * 10) + (*cp++ - '0');
1615 case 's': case 'w': case 'h':
1633 default: /* Any other character, like 'b' counts as byte. */
1647 swabst((u_char *)"i", (u_char *)&x);
1654 swabst((u_char *)"l", (u_char *)&x);