2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 static char sccsid[] = "@(#)tape.c 8.9 (Berkeley) 5/1/95";
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include <sys/param.h>
49 #include <sys/extattr.h>
52 #include <ufs/ufs/extattr.h>
53 #include <ufs/ufs/dinode.h>
54 #include <protocols/dumprestore.h>
71 static long fssize = MAXBSIZE;
73 static int pipein = 0;
74 static int pipecmdin = 0;
75 static FILE *popenfp = NULL;
80 static union u_spcl endoftapemark;
81 static long byteslide = 0;
82 static long blksread; /* blocks read since last header */
83 static int64_t tapeaddr = 0; /* current TP_BSIZE tape record */
84 static long tapesread;
85 static jmp_buf restart;
86 static int gettingfile = 0; /* restart has a valid frame */
87 static char *host = NULL;
88 static int readmapflag;
92 static char lnkbuf[MAXPATHLEN + 1];
95 int Bcvt; /* Swap Bytes */
96 int oldinofmt; /* FreeBSD 1 inode format needs cvt */
98 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
100 char *namespace_names[] = EXTATTR_NAMESPACE_NAMES;
102 static void accthdr(struct s_spcl *);
103 static int checksum(int *);
104 static void findinode(struct s_spcl *);
105 static void findtapeblksize(void);
106 static char *setupextattr(int);
107 static void xtrattr(char *, size_t);
108 static void skiphole(void (*)(char *, size_t), size_t *);
109 static int gethead(struct s_spcl *);
110 static void readtape(char *);
111 static void setdumpnum(void);
112 static u_long swabl(u_long);
113 static u_char *swablong(u_char *, int);
114 static u_char *swabshort(u_char *, int);
115 static void terminateinput(void);
116 static void xtrfile(char *, size_t);
117 static void xtrlnkfile(char *, size_t);
118 static void xtrlnkskip(char *, size_t);
119 static void xtrmap(char *, size_t);
120 static void xtrmapskip(char *, size_t);
121 static void xtrskip(char *, size_t);
124 * Set up an input source
127 setinput(char *source, int ispipecommand)
133 newtapebuf(MAX(NTREC, HIGHDENSITYTREC));
140 if (strchr(source, ':')) {
142 source = strchr(host, ':');
144 if (rmthost(host) == 0)
148 if (strcmp(source, "-") == 0) {
150 * Since input is coming from a pipe we must establish
151 * our own connection to the terminal.
153 terminal = fopen(_PATH_TTY, "r");
154 if (terminal == NULL) {
155 (void)fprintf(stderr, "cannot open %s: %s\n",
156 _PATH_TTY, strerror(errno));
157 terminal = fopen(_PATH_DEVNULL, "r");
158 if (terminal == NULL) {
159 (void)fprintf(stderr, "cannot open %s: %s\n",
160 _PATH_DEVNULL, strerror(errno));
166 /* no longer need or want root privileges */
167 if (setuid(getuid()) != 0) {
168 fprintf(stderr, "setuid failed\n");
171 magtape = strdup(source);
172 if (magtape == NULL) {
173 fprintf(stderr, "Cannot allocate space for magtape buffer\n");
179 newtapebuf(long size)
181 static int tapebufsize = -1;
184 if (size <= tapebufsize)
187 free(tapebuf - TP_BSIZE);
188 tapebuf = malloc((size+1) * TP_BSIZE);
189 if (tapebuf == NULL) {
190 fprintf(stderr, "Cannot allocate space for tape buffer\n");
198 * Verify that the tape drive can be accessed and
199 * that it actually is a dump tape.
207 vprintf(stdout, "Verify tape and initialize maps\n");
209 if (setenv("RESTORE_VOLUME", "1", 1) == -1) {
210 fprintf(stderr, "Cannot set $RESTORE_VOLUME: %s\n",
214 popenfp = popen(magtape, "r");
215 mt = popenfp ? fileno(popenfp) : -1;
219 mt = rmtopen(magtape, 0);
225 mt = open(magtape, O_RDONLY, 0);
227 fprintf(stderr, "%s: %s\n", magtape, strerror(errno));
233 if (!pipein && !pipecmdin && !bflag)
235 if (gethead(&spcl) == FAIL) {
236 fprintf(stderr, "Tape is not a dump tape\n");
240 endoftapemark.s_spcl.c_magic = FS_UFS2_MAGIC;
241 endoftapemark.s_spcl.c_type = TS_END;
242 ip = (int *)&endoftapemark;
243 j = sizeof(union u_spcl) / sizeof(int);
248 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
250 if (vflag || command == 't')
252 dumptime = _time64_to_time(spcl.c_ddate);
253 dumpdate = _time64_to_time(spcl.c_date);
254 if (stat(".", &stbuf) < 0) {
255 fprintf(stderr, "cannot stat .: %s\n", strerror(errno));
258 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
260 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
261 fssize = stbuf.st_blksize;
262 if (((TP_BSIZE - 1) & stbuf.st_blksize) != 0) {
263 fprintf(stderr, "Warning: filesystem with non-multiple-of-%d "
264 "blocksize (%d);\n", TP_BSIZE, stbuf.st_blksize);
265 fssize = roundup(fssize, TP_BSIZE);
266 fprintf(stderr, "\twriting using blocksize %ld\n", fssize);
268 if (spcl.c_volume != 1) {
269 fprintf(stderr, "Tape is not volume 1 of the dump\n");
272 if (gethead(&spcl) == FAIL) {
273 dprintf(stdout, "header read failed at %ld blocks\n", blksread);
274 panic("no header after volume mark!\n");
277 if (spcl.c_type != TS_CLRI) {
278 fprintf(stderr, "Cannot find file removal list\n");
281 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
282 dprintf(stdout, "maxino = %ju\n", (uintmax_t)maxino);
283 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
285 panic("no memory for active inode map\n");
287 curfile.action = USING;
288 getfile(xtrmap, xtrmapskip, xtrmapskip);
289 if (spcl.c_type != TS_BITS) {
290 fprintf(stderr, "Cannot find file dump list\n");
293 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
294 if (map == (char *)NULL)
295 panic("no memory for file dump list\n");
297 curfile.action = USING;
298 getfile(xtrmap, xtrmapskip, xtrmapskip);
300 * If there may be whiteout entries on the tape, pretend that the
301 * whiteout inode exists, so that the whiteout entries can be
304 SETINO(UFS_WINO, dumpmap);
305 /* 'r' restores don't call getvol() for tape 1, so mark it as read. */
311 * Prompt user to load a new dump volume.
312 * "Nextvol" is the next suggested volume to use.
313 * This suggested volume is enforced when doing full
314 * or incremental restores, but can be overridden by
315 * the user when only extracting a subset of the files.
321 long i, newvol, savecnt;
322 union u_spcl tmpspcl;
323 # define tmpbuf tmpspcl.s_spcl
330 prevtapea = tapeaddr;
334 panic("Changing volumes on pipe input?\n");
335 /* Avoid looping if we couldn't ask the user. */
336 if (yflag || ferror(terminal) || feof(terminal))
346 done(1); /* pipes do not get a second chance */
347 if (command == 'R' || command == 'r' || curfile.action != SKIP)
351 while (newvol <= 0) {
352 if (tapesread == 0) {
353 fprintf(stderr, "%s%s%s%s%s%s%s",
354 "You have not read any tapes yet.\n",
355 "If you are extracting just a few files,",
356 " start with the last volume\n",
357 "and work towards the first; restore",
358 " can quickly skip tapes that\n",
359 "have no further files to extract.",
360 " Otherwise, begin with volume 1.\n");
362 fprintf(stderr, "You have read volumes");
364 for (i = 0; i < 32; i++)
365 if (tapesread & (1 << i)) {
366 fprintf(stderr, "%s%ld", buf, i + 1);
369 fprintf(stderr, "\n");
372 fprintf(stderr, "Specify next volume #: ");
373 (void) fflush(stderr);
374 if (fgets(buf, BUFSIZ, terminal) == NULL)
376 } while (buf[0] == '\n');
380 "Volume numbers are positive numerics\n");
383 if (newvol == volno) {
384 tapesread |= 1 << (volno - 1);
388 fprintf(stderr, "Mount tape volume %ld\n", newvol);
389 fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
390 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
391 (void) fflush(stderr);
392 if (fgets(buf, BUFSIZ, terminal) == NULL)
394 if (!strcmp(buf, "none\n")) {
398 if (buf[0] != '\n') {
399 (void) strcpy(magtape, buf);
400 magtape[strlen(magtape) - 1] = '\0';
403 char volno[sizeof("2147483647")];
405 (void)sprintf(volno, "%ld", newvol);
406 if (setenv("RESTORE_VOLUME", volno, 1) == -1) {
407 fprintf(stderr, "Cannot set $RESTORE_VOLUME: %s\n",
411 popenfp = popen(magtape, "r");
412 mt = popenfp ? fileno(popenfp) : -1;
416 mt = rmtopen(magtape, 0);
419 mt = open(magtape, O_RDONLY, 0);
422 fprintf(stderr, "Cannot open %s\n", magtape);
430 if (gethead(&tmpbuf) == FAIL) {
431 dprintf(stdout, "header read failed at %ld blocks\n", blksread);
432 fprintf(stderr, "tape is not dump tape\n");
436 if (tmpbuf.c_volume != volno) {
437 fprintf(stderr, "Wrong volume (%jd)\n",
438 (intmax_t)tmpbuf.c_volume);
442 if (_time64_to_time(tmpbuf.c_date) != dumpdate ||
443 _time64_to_time(tmpbuf.c_ddate) != dumptime) {
444 time_t t = _time64_to_time(tmpbuf.c_date);
445 fprintf(stderr, "Wrong dump date\n\tgot: %s", ctime(&t));
446 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
450 tapesread |= 1 << (volno - 1);
453 * If continuing from the previous volume, skip over any
454 * blocks read already at the end of the previous volume.
456 * If coming to this volume at random, skip to the beginning
457 * of the next record.
459 dprintf(stdout, "last rec %jd, tape starts with %jd\n",
460 (intmax_t)prevtapea, (intmax_t)tmpbuf.c_tapea);
461 if (tmpbuf.c_type == TS_TAPE) {
462 if (curfile.action != USING) {
464 * XXX Dump incorrectly sets c_count to 1 in the
465 * volume header of the first tape, so ignore
466 * c_count when volno == 1.
469 for (i = tmpbuf.c_count; i > 0; i--)
471 } else if (tmpbuf.c_tapea <= prevtapea) {
473 * Normally the value of c_tapea in the volume
474 * header is the record number of the header itself.
475 * However in the volume header following an EOT-
476 * terminated tape, it is the record number of the
477 * first continuation data block (dump bug?).
479 * The next record we want is `prevtapea + 1'.
481 i = prevtapea + 1 - tmpbuf.c_tapea;
482 dprintf(stderr, "Skipping %ld duplicate record%s.\n",
483 i, i > 1 ? "s" : "");
488 if (curfile.action == USING) {
490 panic("active file into volume 1\n");
493 (void) gethead(&spcl);
502 * Handle unexpected EOF.
508 if (gettingfile && curfile.action == USING) {
509 printf("Warning: %s %s\n",
510 "End-of-input encountered while extracting", curfile.name);
512 curfile.name = "<name unknown>";
513 curfile.action = UNKNOWN;
515 curfile.ino = maxino;
523 * handle multiple dumps per tape by skipping forward to the
531 if (dumpnum == 1 || volno != 1)
534 fprintf(stderr, "Cannot have multiple dumps on pipe input\n");
538 tcom.mt_count = dumpnum - 1;
541 rmtioctl(MTFSF, dumpnum - 1);
544 if (!pipecmdin && ioctl(mt, MTIOCTOP, (char *)&tcom) < 0)
545 fprintf(stderr, "ioctl MTFSF: %s\n", strerror(errno));
552 t = _time64_to_time(spcl.c_date);
553 fprintf(stdout, "Dump date: %s", ctime(&t));
554 t = _time64_to_time(spcl.c_ddate);
555 fprintf(stdout, "Dumped from: %s",
556 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&t));
557 if (spcl.c_host[0] == '\0')
559 fprintf(stderr, "Level %jd dump of %s on %s:%s\n",
560 (intmax_t)spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
561 fprintf(stderr, "Label: %s\n", spcl.c_label);
565 extractfile(char *name)
572 struct timespec mtimep[2], ctimep[2];
577 curfile.action = USING;
578 mtimep[0].tv_sec = curfile.atime_sec;
579 mtimep[0].tv_nsec = curfile.atime_nsec;
580 mtimep[1].tv_sec = curfile.mtime_sec;
581 mtimep[1].tv_nsec = curfile.mtime_nsec;
582 ctimep[0].tv_sec = curfile.atime_sec;
583 ctimep[0].tv_nsec = curfile.atime_nsec;
584 ctimep[1].tv_sec = curfile.birthtime_sec;
585 ctimep[1].tv_nsec = curfile.birthtime_nsec;
586 extsize = curfile.extsize;
592 flags = curfile.file_flags;
593 switch (mode & IFMT) {
596 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
601 vprintf(stdout, "skipped socket %s\n", name);
607 ep = lookupname(name);
608 if (ep == NULL || ep->e_flags & EXTRACT)
609 panic("unextracted directory %s\n", name);
613 vprintf(stdout, "extract file %s\n", name);
614 return (genliteraldir(name, curfile.ino));
619 buf = setupextattr(extsize);
620 getfile(xtrlnkfile, xtrattr, xtrlnkskip);
623 "%s: zero length symbolic link (ignored)\n", name);
626 if (linkit(lnkbuf, name, SYMLINK) == GOOD) {
628 set_extattr(-1, name, buf, extsize, SXA_LINK);
629 (void) lchown(name, uid, gid);
630 (void) lchmod(name, mode);
631 (void) utimensat(AT_FDCWD, name, ctimep,
632 AT_SYMLINK_NOFOLLOW);
633 (void) utimensat(AT_FDCWD, name, mtimep,
634 AT_SYMLINK_NOFOLLOW);
635 (void) lchflags(name, flags);
641 vprintf(stdout, "extract fifo %s\n", name);
648 if (mkfifo(name, 0600) < 0) {
649 fprintf(stderr, "%s: cannot create fifo: %s\n",
650 name, strerror(errno));
657 buf = setupextattr(extsize);
658 getfile(xtrnull, xtrattr, xtrnull);
659 set_extattr(-1, name, buf, extsize, SXA_FILE);
661 (void) chown(name, uid, gid);
662 (void) chmod(name, mode);
663 (void) utimensat(AT_FDCWD, name, ctimep, 0);
664 (void) utimensat(AT_FDCWD, name, mtimep, 0);
665 (void) chflags(name, flags);
670 vprintf(stdout, "extract special file %s\n", name);
677 if (mknod(name, (mode & (IFCHR | IFBLK)) | 0600,
678 (int)curfile.rdev) < 0) {
679 fprintf(stderr, "%s: cannot create special file: %s\n",
680 name, strerror(errno));
687 buf = setupextattr(extsize);
688 getfile(xtrnull, xtrattr, xtrnull);
689 set_extattr(-1, name, buf, extsize, SXA_FILE);
691 (void) chown(name, uid, gid);
692 (void) chmod(name, mode);
693 (void) utimensat(AT_FDCWD, name, ctimep, 0);
694 (void) utimensat(AT_FDCWD, name, mtimep, 0);
695 (void) chflags(name, flags);
699 vprintf(stdout, "extract file %s\n", name);
706 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC,
708 fprintf(stderr, "%s: cannot create file: %s\n",
709 name, strerror(errno));
713 buf = setupextattr(extsize);
714 getfile(xtrfile, xtrattr, xtrskip);
716 set_extattr(ofile, name, buf, extsize, SXA_FD);
717 (void) fchown(ofile, uid, gid);
718 (void) fchmod(ofile, mode);
719 (void) futimens(ofile, ctimep);
720 (void) futimens(ofile, mtimep);
721 (void) fchflags(ofile, flags);
729 * Set attributes on a file descriptor, link, or file.
732 set_extattr(int fd, char *name, void *buf, int size, enum set_extattr_mode mode)
734 struct extattr *eap, *eaend;
738 char eaname[EXTATTR_MAXNAMELEN + 1];
740 vprintf(stdout, "Set attributes for %s:", name);
742 for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) {
744 * Make sure this entry is complete.
746 if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) {
747 dprintf(stdout, "\n\t%scorrupted",
748 eap == buf ? "" : "remainder ");
751 if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY)
753 snprintf(eaname, sizeof(eaname), "%.*s",
754 (int)eap->ea_namelength, eap->ea_name);
755 vprintf(stdout, "\n\t%s, (%d bytes), %s",
756 namespace_names[eap->ea_namespace], eap->ea_length,
759 * First we try the general attribute setting interface.
760 * However, some attributes can only be set by root or
761 * by using special interfaces (for example, ACLs).
763 if (mode == SXA_FD) {
764 res = extattr_set_fd(fd, eap->ea_namespace,
765 eaname, EXTATTR_CONTENT(eap),
766 EXTATTR_CONTENT_SIZE(eap));
767 method = "extattr_set_fd";
768 } else if (mode == SXA_LINK) {
769 res = extattr_set_link(name, eap->ea_namespace,
770 eaname, EXTATTR_CONTENT(eap),
771 EXTATTR_CONTENT_SIZE(eap));
772 method = "extattr_set_link";
773 } else if (mode == SXA_FILE) {
774 res = extattr_set_file(name, eap->ea_namespace,
775 eaname, EXTATTR_CONTENT(eap),
776 EXTATTR_CONTENT_SIZE(eap));
777 method = "extattr_set_file";
780 dprintf(stdout, " (set using %s)", method);
784 * If the general interface refuses to set the attribute,
785 * then we try all the specialized interfaces that we
788 if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
789 strcmp(eaname, POSIX1E_ACL_ACCESS_EXTATTR_NAME) == 0) {
790 if (mode == SXA_FD) {
791 error = acl_set_fd(fd, EXTATTR_CONTENT(eap));
792 method = "acl_set_fd";
793 } else if (mode == SXA_LINK) {
794 error = acl_set_link_np(name, ACL_TYPE_ACCESS,
795 EXTATTR_CONTENT(eap));
796 method = "acl_set_link_np";
797 } else if (mode == SXA_FILE) {
798 error = acl_set_file(name, ACL_TYPE_ACCESS,
799 EXTATTR_CONTENT(eap));
800 method = "acl_set_file";
803 dprintf(stdout, " (set using %s)", method);
807 if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
808 strcmp(eaname, POSIX1E_ACL_DEFAULT_EXTATTR_NAME) == 0) {
809 if (mode == SXA_LINK) {
810 error = acl_set_link_np(name, ACL_TYPE_DEFAULT,
811 EXTATTR_CONTENT(eap));
812 method = "acl_set_link_np";
814 error = acl_set_file(name, ACL_TYPE_DEFAULT,
815 EXTATTR_CONTENT(eap));
816 method = "acl_set_file";
819 dprintf(stdout, " (set using %s)", method);
823 vprintf(stdout, " (unable to set)");
825 vprintf(stdout, "\n");
829 * skip over bit maps on the tape
835 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
840 * skip over a file on the tape
846 curfile.action = SKIP;
847 getfile(xtrnull, xtrnull, xtrnull);
851 * Skip a hole in an output file
854 skiphole(void (*skip)(char *, size_t), size_t *seekpos)
859 (*skip)(buf, *seekpos);
865 * Extract a file from the tape.
866 * When an allocated block is found it is passed to the fill function;
867 * when an unallocated block (hole) is found, a zeroed buffer is passed
868 * to the skip function.
871 getfile(void (*datafill)(char *, size_t), void (*attrfill)(char *, size_t),
872 void (*skip)(char *, size_t))
877 int curblk, attrsize;
878 void (*fillit)(char *, size_t);
879 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
885 attrsize = spcl.c_extsize;
886 if (spcl.c_type == TS_END)
887 panic("ran off end of tape\n");
888 if (spcl.c_magic != FS_UFS2_MAGIC)
889 panic("not at beginning of a file\n");
890 if (!gettingfile && setjmp(restart) != 0)
894 if (size == 0 && attrsize > 0) {
900 for (i = 0; i < spcl.c_count; i++) {
901 if (!readmapflag && i > TP_NINDIR) {
903 fprintf(stderr, "spcl.c_count = %jd\n",
904 (intmax_t)spcl.c_count);
907 panic("spcl.c_count = %jd\n",
908 (intmax_t)spcl.c_count);
910 if (readmapflag || spcl.c_addr[i]) {
911 readtape(&buf[curblk++][0]);
912 if (curblk == fssize / TP_BSIZE) {
913 skiphole(skip, &seekpos);
914 (*fillit)((char *)buf, (long)(size > TP_BSIZE ?
915 fssize : (curblk - 1) * TP_BSIZE + size));
920 skiphole(skip, &seekpos);
921 (*fillit)((char *)buf, (long)(size > TP_BSIZE ?
923 (curblk - 1) * TP_BSIZE + size));
927 * We have a block of a hole. Don't skip it
928 * now, because there may be next adjacent
929 * block of the hole in the file. Postpone the
930 * seek until next file write.
932 seekpos += (long)MIN(TP_BSIZE, size);
934 if ((size -= TP_BSIZE) <= 0) {
935 if (size > -TP_BSIZE && curblk > 0) {
936 skiphole(skip, &seekpos);
937 (*fillit)((char *)buf,
938 (long)((curblk * TP_BSIZE) + size));
947 if (spcl.c_count - i > 1)
948 dprintf(stdout, "skipping %d junk block(s)\n",
949 spcl.c_count - i - 1);
950 for (i++; i < spcl.c_count; i++) {
951 if (!readmapflag && i > TP_NINDIR) {
954 "spcl.c_count = %jd\n",
955 (intmax_t)spcl.c_count);
958 panic("spcl.c_count = %jd\n",
959 (intmax_t)spcl.c_count);
961 if (readmapflag || spcl.c_addr[i])
967 if (gethead(&spcl) == GOOD && size > 0) {
968 if (spcl.c_type == TS_ADDR)
971 "Missing address (header) block for %s at %ld blocks\n",
972 curfile.name, blksread);
975 panic("getfile: lost data\n");
981 * These variables are shared between the next two functions.
983 static int extbufsize = 0;
988 * Allocate a buffer into which to extract extended attributes.
991 setupextattr(int extsize)
995 if (extsize <= extbufsize)
999 if ((extbuf = malloc(extsize)) != NULL) {
1000 extbufsize = extsize;
1005 fprintf(stderr, "Cannot extract %d bytes %s for inode %ju, name %s\n",
1006 extsize, "of extended attributes", (uintmax_t)curfile.ino,
1012 * Extract the next block of extended attributes.
1015 xtrattr(char *buf, size_t size)
1018 if (extloc + size > extbufsize)
1019 panic("overrun attribute buffer\n");
1020 memmove(&extbuf[extloc], buf, size);
1025 * Write out the next block of a file.
1028 xtrfile(char *buf, size_t size)
1033 if (write(ofile, buf, (int) size) == -1) {
1035 "write error extracting inode %ju, name %s\nwrite: %s\n",
1036 (uintmax_t)curfile.ino, curfile.name, strerror(errno));
1041 * Skip over a hole in a file.
1045 xtrskip(char *buf, size_t size)
1048 if (lseek(ofile, size, SEEK_CUR) == -1) {
1050 "seek error extracting inode %ju, name %s\nlseek: %s\n",
1051 (uintmax_t)curfile.ino, curfile.name, strerror(errno));
1057 * Collect the next block of a symbolic link.
1060 xtrlnkfile(char *buf, size_t size)
1064 if (pathlen > MAXPATHLEN) {
1065 fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n",
1066 curfile.name, lnkbuf, buf, pathlen);
1069 (void) strcat(lnkbuf, buf);
1073 * Skip over a hole in a symbolic link (should never happen).
1077 xtrlnkskip(char *buf, size_t size)
1080 fprintf(stderr, "unallocated block in symbolic link %s\n",
1086 * Collect the next block of a bit map.
1089 xtrmap(char *buf, size_t size)
1092 memmove(map, buf, size);
1097 * Skip over a hole in a bit map (should never happen).
1101 xtrmapskip(char *buf, size_t size)
1104 panic("hole in map\n");
1109 * Noop, when an extraction function is not needed.
1113 xtrnull(char *buf, size_t size)
1120 * Read TP_BSIZE blocks from the input.
1121 * Handle read errors, and end of media.
1126 long rd, newvol, i, oldnumtrec;
1127 int cnt, seek_failed;
1129 if (blkcnt + (byteslide > 0) < numtrec) {
1130 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE) + byteslide], (long)TP_BSIZE);
1136 memmove(&tapebuf[-TP_BSIZE],
1137 &tapebuf[(numtrec-1) * TP_BSIZE], (long)TP_BSIZE);
1138 oldnumtrec = numtrec;
1139 for (i = 0; i < ntrec; i++)
1140 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1143 cnt = ntrec * TP_BSIZE;
1148 i = rmtread(&tapebuf[rd], cnt);
1151 i = read(mt, &tapebuf[rd], cnt);
1153 * Check for mid-tape short read error.
1154 * If found, skip rest of buffer and start with the next.
1156 if (!pipein && !pipecmdin && numtrec < ntrec && i > 0) {
1157 dprintf(stdout, "mid-media short read error.\n");
1161 * Handle partial block read.
1163 if ((pipein || pipecmdin) && i == 0 && rd > 0)
1165 else if (i > 0 && i != ntrec * TP_BSIZE) {
1166 if (pipein || pipecmdin) {
1174 * Short read. Process the blocks read.
1176 if (i % TP_BSIZE != 0)
1178 "partial block read: %ld should be %ld\n",
1179 i, ntrec * TP_BSIZE);
1180 numtrec = i / TP_BSIZE;
1184 * Handle read error.
1187 fprintf(stderr, "Tape read error while ");
1188 switch (curfile.action) {
1190 fprintf(stderr, "trying to set up tape\n");
1193 fprintf(stderr, "trying to resynchronize\n");
1196 fprintf(stderr, "restoring %s\n", curfile.name);
1199 fprintf(stderr, "skipping over inode %ju\n",
1200 (uintmax_t)curfile.ino);
1203 if (!yflag && !reply("continue"))
1205 i = ntrec * TP_BSIZE;
1206 memset(tapebuf, 0, i);
1209 seek_failed = (rmtseek(i, 1) < 0);
1212 seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1);
1216 "continuation failed: %s\n", strerror(errno));
1221 * Handle end of tape.
1224 vprintf(stdout, "End-of-tape encountered\n");
1233 if (rd % TP_BSIZE != 0)
1234 panic("partial block read: %ld should be %ld\n",
1235 rd, ntrec * TP_BSIZE);
1237 memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE);
1239 if (oldnumtrec == 0)
1242 blkcnt -= oldnumtrec;
1244 &tapebuf[(blkcnt++ * TP_BSIZE) + byteslide], (long)TP_BSIZE);
1250 findtapeblksize(void)
1254 for (i = 0; i < ntrec; i++)
1255 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1259 i = rmtread(tapebuf, ntrec * TP_BSIZE);
1262 i = read(mt, tapebuf, ntrec * TP_BSIZE);
1265 fprintf(stderr, "tape read error: %s\n", strerror(errno));
1268 if (i % TP_BSIZE != 0) {
1269 fprintf(stderr, "Tape block size (%ld) %s (%d)\n",
1270 i, "is not a multiple of dump block size", TP_BSIZE);
1273 ntrec = i / TP_BSIZE;
1275 vprintf(stdout, "Tape block size is %ld\n", ntrec);
1297 * Read the next block from the tape.
1298 * If it is not any valid header, return an error.
1301 gethead(struct s_spcl *buf)
1305 readtape((char *)buf);
1306 if (buf->c_magic != FS_UFS2_MAGIC && buf->c_magic != NFS_MAGIC) {
1307 if (buf->c_magic == OFS_MAGIC) {
1309 "Format of dump tape is too old. Must use\n");
1311 "a version of restore from before 2002.\n");
1314 if (swabl(buf->c_magic) != FS_UFS2_MAGIC &&
1315 buf->c_magic != NFS_MAGIC) {
1316 if (buf->c_magic == OFS_MAGIC) {
1318 "Format of dump tape is too old. Must use\n");
1320 "a version of restore from before 2002.\n");
1325 vprintf(stdout, "Note: Doing Byte swapping\n");
1329 if (checksum((int *)buf) == FAIL)
1332 swabst((u_char *)"8l4s1q8l2q17l", (u_char *)buf);
1333 swabst((u_char *)"l",(u_char *) &buf->c_level);
1334 swabst((u_char *)"2l4q",(u_char *) &buf->c_flags);
1338 switch (buf->c_type) {
1343 * Have to patch up missing information in bit map headers
1345 buf->c_size = buf->c_count * TP_BSIZE;
1346 if (buf->c_count > TP_NINDIR)
1349 for (i = 0; i < buf->c_count; i++)
1354 if (buf->c_magic == NFS_MAGIC &&
1355 (buf->c_flags & NFS_DR_NEWINODEFMT) == 0)
1366 * For old dump tapes, have to copy up old fields to
1369 if (buf->c_magic == NFS_MAGIC) {
1370 buf->c_tapea = buf->c_old_tapea;
1371 buf->c_firstrec = buf->c_old_firstrec;
1372 buf->c_date = _time32_to_time(buf->c_old_date);
1373 buf->c_ddate = _time32_to_time(buf->c_old_ddate);
1374 buf->c_atime = _time32_to_time(buf->c_old_atime);
1375 buf->c_mtime = _time32_to_time(buf->c_old_mtime);
1376 buf->c_birthtime = 0;
1377 buf->c_birthtimensec = 0;
1383 panic("gethead: unknown inode type %d\n", buf->c_type);
1386 if (dumpdate != 0 && _time64_to_time(buf->c_date) != dumpdate)
1387 fprintf(stderr, "Header with wrong dumpdate.\n");
1389 * If we're restoring a filesystem with the old (FreeBSD 1)
1390 * format inodes, copy the uid/gid to the new location
1393 buf->c_uid = buf->c_spare1[1];
1394 buf->c_gid = buf->c_spare1[2];
1396 buf->c_magic = FS_UFS2_MAGIC;
1397 tapeaddr = buf->c_tapea;
1404 * Check that a header is where it belongs and predict the next header
1407 accthdr(struct s_spcl *header)
1409 static ino_t previno = 0x7fffffff;
1410 static int prevtype;
1411 static long predict;
1414 if (header->c_type == TS_TAPE) {
1415 fprintf(stderr, "Volume header ");
1416 if (header->c_firstrec)
1417 fprintf(stderr, "begins with record %jd",
1418 (intmax_t)header->c_firstrec);
1419 fprintf(stderr, "\n");
1420 previno = 0x7fffffff;
1423 if (previno == 0x7fffffff)
1427 fprintf(stderr, "Dumped inodes map header");
1430 fprintf(stderr, "Used inodes map header");
1433 fprintf(stderr, "File header, ino %ju", (uintmax_t)previno);
1436 fprintf(stderr, "File continuation header, ino %ju",
1437 (uintmax_t)previno);
1440 fprintf(stderr, "End of tape header");
1443 if (predict != blksread - 1)
1444 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
1445 predict, blksread - 1);
1446 fprintf(stderr, "\n");
1449 if (header->c_type != TS_END)
1450 for (i = 0; i < header->c_count; i++)
1451 if (readmapflag || header->c_addr[i] != 0)
1455 prevtype = header->c_type;
1456 previno = header->c_inumber;
1460 * Find an inode header.
1461 * Complain if had to skip.
1464 findinode(struct s_spcl *header)
1466 static long skipcnt = 0;
1471 curfile.name = "<name unknown>";
1472 curfile.action = UNKNOWN;
1476 htype = header->c_type;
1481 * Skip up to the beginning of the next record
1483 for (i = 0; i < header->c_count; i++)
1484 if (header->c_addr[i])
1486 while (gethead(header) == FAIL ||
1487 _time64_to_time(header->c_date) != dumpdate) {
1491 if (byteslide < TP_BSIZE) {
1501 curfile.mode = header->c_mode;
1502 curfile.uid = header->c_uid;
1503 curfile.gid = header->c_gid;
1504 curfile.file_flags = header->c_file_flags;
1505 curfile.rdev = header->c_rdev;
1506 curfile.atime_sec = header->c_atime;
1507 curfile.atime_nsec = header->c_atimensec;
1508 curfile.mtime_sec = header->c_mtime;
1509 curfile.mtime_nsec = header->c_mtimensec;
1510 curfile.birthtime_sec = header->c_birthtime;
1511 curfile.birthtime_nsec = header->c_birthtimensec;
1512 curfile.extsize = header->c_extsize;
1513 curfile.size = header->c_size;
1514 curfile.ino = header->c_inumber;
1518 /* If we missed some tapes, get another volume. */
1519 if (tapesread & (tapesread + 1)) {
1523 curfile.ino = maxino;
1527 curfile.name = "<file removal list>";
1531 curfile.name = "<file dump list>";
1536 fprintf(stderr, "unexpected tape header\n");
1538 panic("unexpected tape header\n");
1542 fprintf(stderr, "unknown tape header type %d\n",
1545 panic("unknown tape header type %d\n",
1547 while (gethead(header) == FAIL ||
1548 _time64_to_time(header->c_date) != dumpdate) {
1552 if (byteslide < TP_BSIZE) {
1561 } while (htype == TS_ADDR);
1563 fprintf(stderr, "resync restore, skipped %ld %s\n",
1564 skipcnt, Dflag ? "bytes" : "blocks");
1573 j = sizeof(union u_spcl) / sizeof(int);
1580 /* What happens if we want to read restore tapes
1581 for a 16bit int machine??? */
1587 if (i != CHECKSUM) {
1588 fprintf(stderr, "Checksum error %o, inode %ju file %s\n", i,
1589 (uintmax_t)curfile.ino, curfile.name);
1599 msg(const char *fmt, ...)
1603 (void)vfprintf(stderr, fmt, ap);
1606 #endif /* RRESTORE */
1609 swabshort(u_char *sp, int n)
1614 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
1621 swablong(u_char *sp, int n)
1626 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
1627 c = sp[2]; sp[2] = sp[1]; sp[1] = c;
1634 swabquad(u_char *sp, int n)
1639 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
1640 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
1641 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
1642 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
1649 swabst(u_char *cp, u_char *sp)
1655 case '0': case '1': case '2': case '3': case '4':
1656 case '5': case '6': case '7': case '8': case '9':
1657 n = (n * 10) + (*cp++ - '0');
1660 case 's': case 'w': case 'h':
1663 sp = swabshort(sp, n);
1669 sp = swablong(sp, n);
1675 sp = swabquad(sp, n);
1685 fprintf(stderr, "Unknown conversion character: %c\n",
1698 swabst((u_char *)"l", (u_char *)&x);