1 /*
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.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
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 * 4. 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.
21 *
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
32 * SUCH DAMAGE.
33 */
34
35 #ifndef lint
36 #if 0
37 static char sccsid[] = "@(#)tape.c 8.9 (Berkeley) 5/1/95";
38 #endif
39 #endif /* not lint */
40
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
43
44 #include <sys/param.h>
45 #include <sys/file.h>
46 #include <sys/mtio.h>
47 #include <sys/stat.h>
48 #include <sys/time.h>
49 #include <sys/extattr.h>
50 #include <sys/acl.h>
51
52 #include <ufs/ufs/extattr.h>
53 #include <ufs/ufs/dinode.h>
54 #include <protocols/dumprestore.h>
55
56 #include <errno.h>
57 #include <limits.h>
58 #include <paths.h>
59 #include <setjmp.h>
60 #include <stdint.h>
61 #include <stdio.h>
62 #include <stdlib.h>
63 #include <string.h>
64 #include <time.h>
65 #include <timeconv.h>
66 #include <unistd.h>
67
68 #include "restore.h"
69 #include "extern.h"
70
71 static long fssize = MAXBSIZE;
72 static int mt = -1;
73 static int pipein = 0;
74 static int pipecmdin = 0;
75 static FILE *popenfp = NULL;
76 static char *magtape;
77 static int blkcnt;
78 static int numtrec;
79 static char *tapebuf;
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;
89
90 static int ofile;
91 static char *map;
92 static char lnkbuf[MAXPATHLEN + 1];
93 static int pathlen;
94
95 int Bcvt; /* Swap Bytes */
96 int oldinofmt; /* FreeBSD 1 inode format needs cvt */
97
98 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
99
100 char *namespace_names[] = EXTATTR_NAMESPACE_NAMES;
101
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 *, long);
108 static void set_extattr_link(char *, void *, int);
109 static void set_extattr_fd(int, char *, void *, int);
110 static void skiphole(void (*)(char *, long), long *);
111 static int gethead(struct s_spcl *);
112 static void readtape(char *);
113 static void setdumpnum(void);
114 static u_long swabl(u_long);
115 static u_char *swablong(u_char *, int);
116 static u_char *swabshort(u_char *, int);
117 static void terminateinput(void);
118 static void xtrfile(char *, long);
119 static void xtrlnkfile(char *, long);
120 static void xtrlnkskip(char *, long);
121 static void xtrmap(char *, long);
122 static void xtrmapskip(char *, long);
123 static void xtrskip(char *, long);
124
125 /*
126 * Set up an input source
127 */
128 void
setinput(char * source,int ispipecommand)129 setinput(char *source, int ispipecommand)
130 {
131 FLUSHTAPEBUF();
132 if (bflag)
133 newtapebuf(ntrec);
134 else
135 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
136 terminal = stdin;
137
138 if (ispipecommand)
139 pipecmdin++;
140 else
141 #ifdef RRESTORE
142 if (strchr(source, ':')) {
143 host = source;
144 source = strchr(host, ':');
145 *source++ = '\0';
146 if (rmthost(host) == 0)
147 done(1);
148 } else
149 #endif
150 if (strcmp(source, "-") == 0) {
151 /*
152 * Since input is coming from a pipe we must establish
153 * our own connection to the terminal.
154 */
155 terminal = fopen(_PATH_TTY, "r");
156 if (terminal == NULL) {
157 (void)fprintf(stderr, "cannot open %s: %s\n",
158 _PATH_TTY, strerror(errno));
159 terminal = fopen(_PATH_DEVNULL, "r");
160 if (terminal == NULL) {
161 (void)fprintf(stderr, "cannot open %s: %s\n",
162 _PATH_DEVNULL, strerror(errno));
163 done(1);
164 }
165 }
166 pipein++;
167 }
168 /* no longer need or want root privileges */
169 if (setuid(getuid()) != 0) {
170 fprintf(stderr, "setuid failed\n");
171 done(1);
172 }
173 magtape = strdup(source);
174 if (magtape == NULL) {
175 fprintf(stderr, "Cannot allocate space for magtape buffer\n");
176 done(1);
177 }
178 }
179
180 void
newtapebuf(long size)181 newtapebuf(long size)
182 {
183 static int tapebufsize = -1;
184
185 ntrec = size;
186 if (size <= tapebufsize)
187 return;
188 if (tapebuf != NULL)
189 free(tapebuf - TP_BSIZE);
190 tapebuf = malloc((size+1) * TP_BSIZE);
191 if (tapebuf == NULL) {
192 fprintf(stderr, "Cannot allocate space for tape buffer\n");
193 done(1);
194 }
195 tapebuf += TP_BSIZE;
196 tapebufsize = size;
197 }
198
199 /*
200 * Verify that the tape drive can be accessed and
201 * that it actually is a dump tape.
202 */
203 void
setup(void)204 setup(void)
205 {
206 int i, j, *ip;
207 struct stat stbuf;
208
209 vprintf(stdout, "Verify tape and initialize maps\n");
210 if (pipecmdin) {
211 if (setenv("RESTORE_VOLUME", "1", 1) == -1) {
212 fprintf(stderr, "Cannot set $RESTORE_VOLUME: %s\n",
213 strerror(errno));
214 done(1);
215 }
216 popenfp = popen(magtape, "r");
217 mt = popenfp ? fileno(popenfp) : -1;
218 } else
219 #ifdef RRESTORE
220 if (host)
221 mt = rmtopen(magtape, 0);
222 else
223 #endif
224 if (pipein)
225 mt = 0;
226 else
227 mt = open(magtape, O_RDONLY, 0);
228 if (mt < 0) {
229 fprintf(stderr, "%s: %s\n", magtape, strerror(errno));
230 done(1);
231 }
232 volno = 1;
233 setdumpnum();
234 FLUSHTAPEBUF();
235 if (!pipein && !pipecmdin && !bflag)
236 findtapeblksize();
237 if (gethead(&spcl) == FAIL) {
238 fprintf(stderr, "Tape is not a dump tape\n");
239 done(1);
240 }
241 if (pipein) {
242 endoftapemark.s_spcl.c_magic = FS_UFS2_MAGIC;
243 endoftapemark.s_spcl.c_type = TS_END;
244 ip = (int *)&endoftapemark;
245 j = sizeof(union u_spcl) / sizeof(int);
246 i = 0;
247 do
248 i += *ip++;
249 while (--j);
250 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
251 }
252 if (vflag || command == 't')
253 printdumpinfo();
254 dumptime = _time64_to_time(spcl.c_ddate);
255 dumpdate = _time64_to_time(spcl.c_date);
256 if (stat(".", &stbuf) < 0) {
257 fprintf(stderr, "cannot stat .: %s\n", strerror(errno));
258 done(1);
259 }
260 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
261 fssize = TP_BSIZE;
262 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
263 fssize = stbuf.st_blksize;
264 if (((TP_BSIZE - 1) & stbuf.st_blksize) != 0) {
265 fprintf(stderr, "Warning: filesystem with non-multiple-of-%d "
266 "blocksize (%d);\n", TP_BSIZE, stbuf.st_blksize);
267 fssize = roundup(fssize, TP_BSIZE);
268 fprintf(stderr, "\twriting using blocksize %ld\n", fssize);
269 }
270 if (spcl.c_volume != 1) {
271 fprintf(stderr, "Tape is not volume 1 of the dump\n");
272 done(1);
273 }
274 if (gethead(&spcl) == FAIL) {
275 dprintf(stdout, "header read failed at %ld blocks\n", blksread);
276 panic("no header after volume mark!\n");
277 }
278 findinode(&spcl);
279 if (spcl.c_type != TS_CLRI) {
280 fprintf(stderr, "Cannot find file removal list\n");
281 done(1);
282 }
283 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
284 dprintf(stdout, "maxino = %ju\n", (uintmax_t)maxino);
285 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
286 if (map == NULL)
287 panic("no memory for active inode map\n");
288 usedinomap = map;
289 curfile.action = USING;
290 getfile(xtrmap, xtrmapskip, xtrmapskip);
291 if (spcl.c_type != TS_BITS) {
292 fprintf(stderr, "Cannot find file dump list\n");
293 done(1);
294 }
295 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
296 if (map == (char *)NULL)
297 panic("no memory for file dump list\n");
298 dumpmap = map;
299 curfile.action = USING;
300 getfile(xtrmap, xtrmapskip, xtrmapskip);
301 /*
302 * If there may be whiteout entries on the tape, pretend that the
303 * whiteout inode exists, so that the whiteout entries can be
304 * extracted.
305 */
306 SETINO(WINO, dumpmap);
307 /* 'r' restores don't call getvol() for tape 1, so mark it as read. */
308 if (command == 'r')
309 tapesread = 1;
310 }
311
312 /*
313 * Prompt user to load a new dump volume.
314 * "Nextvol" is the next suggested volume to use.
315 * This suggested volume is enforced when doing full
316 * or incremental restores, but can be overridden by
317 * the user when only extracting a subset of the files.
318 */
319 void
getvol(long nextvol)320 getvol(long nextvol)
321 {
322 int64_t prevtapea;
323 long i, newvol, savecnt;
324 union u_spcl tmpspcl;
325 # define tmpbuf tmpspcl.s_spcl
326 char buf[TP_BSIZE];
327
328 if (nextvol == 1) {
329 tapesread = 0;
330 gettingfile = 0;
331 }
332 prevtapea = tapeaddr;
333 savecnt = blksread;
334 if (pipein) {
335 if (nextvol != 1) {
336 panic("Changing volumes on pipe input?\n");
337 /* Avoid looping if we couldn't ask the user. */
338 if (yflag || ferror(terminal) || feof(terminal))
339 done(1);
340 }
341 if (volno == 1)
342 return;
343 goto gethdr;
344 }
345 again:
346 if (pipein)
347 done(1); /* pipes do not get a second chance */
348 if (command == 'R' || command == 'r' || curfile.action != SKIP)
349 newvol = nextvol;
350 else
351 newvol = 0;
352 while (newvol <= 0) {
353 if (tapesread == 0) {
354 fprintf(stderr, "%s%s%s%s%s%s%s",
355 "You have not read any tapes yet.\n",
356 "If you are extracting just a few files,",
357 " start with the last volume\n",
358 "and work towards the first; restore",
359 " can quickly skip tapes that\n",
360 "have no further files to extract.",
361 " Otherwise, begin with volume 1.\n");
362 } else {
363 fprintf(stderr, "You have read volumes");
364 strcpy(buf, ": ");
365 for (i = 0; i < 32; i++)
366 if (tapesread & (1 << i)) {
367 fprintf(stderr, "%s%ld", buf, i + 1);
368 strcpy(buf, ", ");
369 }
370 fprintf(stderr, "\n");
371 }
372 do {
373 fprintf(stderr, "Specify next volume #: ");
374 (void) fflush(stderr);
375 if (fgets(buf, BUFSIZ, terminal) == NULL)
376 done(1);
377 } while (buf[0] == '\n');
378 newvol = atoi(buf);
379 if (newvol <= 0) {
380 fprintf(stderr,
381 "Volume numbers are positive numerics\n");
382 }
383 }
384 if (newvol == volno) {
385 tapesread |= 1 << (volno - 1);
386 return;
387 }
388 closemt();
389 fprintf(stderr, "Mount tape volume %ld\n", newvol);
390 fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
391 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
392 (void) fflush(stderr);
393 if (fgets(buf, BUFSIZ, terminal) == NULL)
394 done(1);
395 if (!strcmp(buf, "none\n")) {
396 terminateinput();
397 return;
398 }
399 if (buf[0] != '\n') {
400 (void) strcpy(magtape, buf);
401 magtape[strlen(magtape) - 1] = '\0';
402 }
403 if (pipecmdin) {
404 char volno[sizeof("2147483647")];
405
406 (void)sprintf(volno, "%ld", newvol);
407 if (setenv("RESTORE_VOLUME", volno, 1) == -1) {
408 fprintf(stderr, "Cannot set $RESTORE_VOLUME: %s\n",
409 strerror(errno));
410 done(1);
411 }
412 popenfp = popen(magtape, "r");
413 mt = popenfp ? fileno(popenfp) : -1;
414 } else
415 #ifdef RRESTORE
416 if (host)
417 mt = rmtopen(magtape, 0);
418 else
419 #endif
420 mt = open(magtape, O_RDONLY, 0);
421
422 if (mt == -1) {
423 fprintf(stderr, "Cannot open %s\n", magtape);
424 volno = -1;
425 goto again;
426 }
427 gethdr:
428 volno = newvol;
429 setdumpnum();
430 FLUSHTAPEBUF();
431 if (gethead(&tmpbuf) == FAIL) {
432 dprintf(stdout, "header read failed at %ld blocks\n", blksread);
433 fprintf(stderr, "tape is not dump tape\n");
434 volno = 0;
435 goto again;
436 }
437 if (tmpbuf.c_volume != volno) {
438 fprintf(stderr, "Wrong volume (%jd)\n",
439 (intmax_t)tmpbuf.c_volume);
440 volno = 0;
441 goto again;
442 }
443 if (_time64_to_time(tmpbuf.c_date) != dumpdate ||
444 _time64_to_time(tmpbuf.c_ddate) != dumptime) {
445 time_t t = _time64_to_time(tmpbuf.c_date);
446 fprintf(stderr, "Wrong dump date\n\tgot: %s", ctime(&t));
447 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
448 volno = 0;
449 goto again;
450 }
451 tapesread |= 1 << (volno - 1);
452 blksread = savecnt;
453 /*
454 * If continuing from the previous volume, skip over any
455 * blocks read already at the end of the previous volume.
456 *
457 * If coming to this volume at random, skip to the beginning
458 * of the next record.
459 */
460 dprintf(stdout, "last rec %jd, tape starts with %jd\n",
461 (intmax_t)prevtapea, (intmax_t)tmpbuf.c_tapea);
462 if (tmpbuf.c_type == TS_TAPE) {
463 if (curfile.action != USING) {
464 /*
465 * XXX Dump incorrectly sets c_count to 1 in the
466 * volume header of the first tape, so ignore
467 * c_count when volno == 1.
468 */
469 if (volno != 1)
470 for (i = tmpbuf.c_count; i > 0; i--)
471 readtape(buf);
472 } else if (tmpbuf.c_tapea <= prevtapea) {
473 /*
474 * Normally the value of c_tapea in the volume
475 * header is the record number of the header itself.
476 * However in the volume header following an EOT-
477 * terminated tape, it is the record number of the
478 * first continuation data block (dump bug?).
479 *
480 * The next record we want is `prevtapea + 1'.
481 */
482 i = prevtapea + 1 - tmpbuf.c_tapea;
483 dprintf(stderr, "Skipping %ld duplicate record%s.\n",
484 i, i > 1 ? "s" : "");
485 while (--i >= 0)
486 readtape(buf);
487 }
488 }
489 if (curfile.action == USING) {
490 if (volno == 1)
491 panic("active file into volume 1\n");
492 return;
493 }
494 (void) gethead(&spcl);
495 findinode(&spcl);
496 if (gettingfile) {
497 gettingfile = 0;
498 longjmp(restart, 1);
499 }
500 }
501
502 /*
503 * Handle unexpected EOF.
504 */
505 static void
terminateinput(void)506 terminateinput(void)
507 {
508
509 if (gettingfile && curfile.action == USING) {
510 printf("Warning: %s %s\n",
511 "End-of-input encountered while extracting", curfile.name);
512 }
513 curfile.name = "<name unknown>";
514 curfile.action = UNKNOWN;
515 curfile.mode = 0;
516 curfile.ino = maxino;
517 if (gettingfile) {
518 gettingfile = 0;
519 longjmp(restart, 1);
520 }
521 }
522
523 /*
524 * handle multiple dumps per tape by skipping forward to the
525 * appropriate one.
526 */
527 static void
setdumpnum(void)528 setdumpnum(void)
529 {
530 struct mtop tcom;
531
532 if (dumpnum == 1 || volno != 1)
533 return;
534 if (pipein) {
535 fprintf(stderr, "Cannot have multiple dumps on pipe input\n");
536 done(1);
537 }
538 tcom.mt_op = MTFSF;
539 tcom.mt_count = dumpnum - 1;
540 #ifdef RRESTORE
541 if (host)
542 rmtioctl(MTFSF, dumpnum - 1);
543 else
544 #endif
545 if (!pipecmdin && ioctl(mt, MTIOCTOP, (char *)&tcom) < 0)
546 fprintf(stderr, "ioctl MTFSF: %s\n", strerror(errno));
547 }
548
549 void
printdumpinfo(void)550 printdumpinfo(void)
551 {
552 time_t t;
553 t = _time64_to_time(spcl.c_date);
554 fprintf(stdout, "Dump date: %s", ctime(&t));
555 t = _time64_to_time(spcl.c_ddate);
556 fprintf(stdout, "Dumped from: %s",
557 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&t));
558 if (spcl.c_host[0] == '\0')
559 return;
560 fprintf(stderr, "Level %jd dump of %s on %s:%s\n",
561 (intmax_t)spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
562 fprintf(stderr, "Label: %s\n", spcl.c_label);
563 }
564
565 int
extractfile(char * name)566 extractfile(char *name)
567 {
568 int flags;
569 uid_t uid;
570 gid_t gid;
571 mode_t mode;
572 int extsize;
573 struct timespec mtimep[2], ctimep[2];
574 struct entry *ep;
575 char *buf;
576
577 curfile.name = name;
578 curfile.action = USING;
579 mtimep[0].tv_sec = curfile.atime_sec;
580 mtimep[0].tv_nsec = curfile.atime_nsec;
581 mtimep[1].tv_sec = curfile.mtime_sec;
582 mtimep[1].tv_nsec = curfile.mtime_nsec;
583 ctimep[0].tv_sec = curfile.atime_sec;
584 ctimep[0].tv_nsec = curfile.atime_nsec;
585 ctimep[1].tv_sec = curfile.birthtime_sec;
586 ctimep[1].tv_nsec = curfile.birthtime_nsec;
587 extsize = curfile.extsize;
588 uid = getuid();
589 if (uid == 0)
590 uid = curfile.uid;
591 gid = curfile.gid;
592 mode = curfile.mode;
593 flags = curfile.file_flags;
594 switch (mode & IFMT) {
595
596 default:
597 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
598 skipfile();
599 return (FAIL);
600
601 case IFSOCK:
602 vprintf(stdout, "skipped socket %s\n", name);
603 skipfile();
604 return (GOOD);
605
606 case IFDIR:
607 if (mflag) {
608 ep = lookupname(name);
609 if (ep == NULL || ep->e_flags & EXTRACT)
610 panic("unextracted directory %s\n", name);
611 skipfile();
612 return (GOOD);
613 }
614 vprintf(stdout, "extract file %s\n", name);
615 return (genliteraldir(name, curfile.ino));
616
617 case IFLNK:
618 lnkbuf[0] = '\0';
619 pathlen = 0;
620 buf = setupextattr(extsize);
621 getfile(xtrlnkfile, xtrattr, xtrlnkskip);
622 if (pathlen == 0) {
623 vprintf(stdout,
624 "%s: zero length symbolic link (ignored)\n", name);
625 return (GOOD);
626 }
627 if (linkit(lnkbuf, name, SYMLINK) == GOOD) {
628 if (extsize > 0)
629 set_extattr_link(name, buf, extsize);
630 (void) lchown(name, uid, gid);
631 (void) lchmod(name, mode);
632 (void) utimensat(AT_FDCWD, name, ctimep,
633 AT_SYMLINK_NOFOLLOW);
634 (void) utimensat(AT_FDCWD, name, mtimep,
635 AT_SYMLINK_NOFOLLOW);
636 (void) lchflags(name, flags);
637 return (GOOD);
638 }
639 return (FAIL);
640
641 case IFIFO:
642 vprintf(stdout, "extract fifo %s\n", name);
643 if (Nflag) {
644 skipfile();
645 return (GOOD);
646 }
647 if (uflag)
648 (void) unlink(name);
649 if (mkfifo(name, 0600) < 0) {
650 fprintf(stderr, "%s: cannot create fifo: %s\n",
651 name, strerror(errno));
652 skipfile();
653 return (FAIL);
654 }
655 if (extsize == 0) {
656 skipfile();
657 } else {
658 buf = setupextattr(extsize);
659 getfile(xtrnull, xtrattr, xtrnull);
660 set_extattr_file(name, buf, extsize);
661 }
662 (void) chown(name, uid, gid);
663 (void) chmod(name, mode);
664 (void) utimensat(AT_FDCWD, name, ctimep, 0);
665 (void) utimensat(AT_FDCWD, name, mtimep, 0);
666 (void) chflags(name, flags);
667 return (GOOD);
668
669 case IFCHR:
670 case IFBLK:
671 vprintf(stdout, "extract special file %s\n", name);
672 if (Nflag) {
673 skipfile();
674 return (GOOD);
675 }
676 if (uflag)
677 (void) unlink(name);
678 if (mknod(name, (mode & (IFCHR | IFBLK)) | 0600,
679 (int)curfile.rdev) < 0) {
680 fprintf(stderr, "%s: cannot create special file: %s\n",
681 name, strerror(errno));
682 skipfile();
683 return (FAIL);
684 }
685 if (extsize == 0) {
686 skipfile();
687 } else {
688 buf = setupextattr(extsize);
689 getfile(xtrnull, xtrattr, xtrnull);
690 set_extattr_file(name, buf, extsize);
691 }
692 (void) chown(name, uid, gid);
693 (void) chmod(name, mode);
694 (void) utimensat(AT_FDCWD, name, ctimep, 0);
695 (void) utimensat(AT_FDCWD, name, mtimep, 0);
696 (void) chflags(name, flags);
697 return (GOOD);
698
699 case IFREG:
700 vprintf(stdout, "extract file %s\n", name);
701 if (Nflag) {
702 skipfile();
703 return (GOOD);
704 }
705 if (uflag)
706 (void) unlink(name);
707 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC,
708 0600)) < 0) {
709 fprintf(stderr, "%s: cannot create file: %s\n",
710 name, strerror(errno));
711 skipfile();
712 return (FAIL);
713 }
714 buf = setupextattr(extsize);
715 getfile(xtrfile, xtrattr, xtrskip);
716 if (extsize > 0)
717 set_extattr_fd(ofile, name, buf, extsize);
718 (void) fchown(ofile, uid, gid);
719 (void) fchmod(ofile, mode);
720 (void) futimens(ofile, ctimep);
721 (void) futimens(ofile, mtimep);
722 (void) fchflags(ofile, flags);
723 (void) close(ofile);
724 return (GOOD);
725 }
726 /* NOTREACHED */
727 }
728
729 /*
730 * Set attributes for a file.
731 */
732 void
set_extattr_file(char * name,void * buf,int size)733 set_extattr_file(char *name, void *buf, int size)
734 {
735 struct extattr *eap, *eaend;
736
737 vprintf(stdout, "Set attributes for %s:", name);
738 eaend = buf + size;
739 for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) {
740 /*
741 * Make sure this entry is complete.
742 */
743 if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) {
744 dprintf(stdout, "\n\t%scorrupted",
745 eap == buf ? "" : "remainder ");
746 break;
747 }
748 if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY)
749 continue;
750 vprintf(stdout, "\n\t%s, (%d bytes), %*s",
751 namespace_names[eap->ea_namespace], eap->ea_length,
752 eap->ea_namelength, eap->ea_name);
753 /*
754 * First we try the general attribute setting interface.
755 * However, some attributes can only be set by root or
756 * by using special interfaces (for example, ACLs).
757 */
758 if (extattr_set_file(name, eap->ea_namespace, eap->ea_name,
759 EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) {
760 dprintf(stdout, " (set using extattr_set_file)");
761 continue;
762 }
763 /*
764 * If the general interface refuses to set the attribute,
765 * then we try all the specialized interfaces that we
766 * know about.
767 */
768 if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
769 !strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) {
770 if (acl_set_file(name, ACL_TYPE_ACCESS,
771 EXTATTR_CONTENT(eap)) != -1) {
772 dprintf(stdout, " (set using acl_set_file)");
773 continue;
774 }
775 }
776 if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
777 !strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) {
778 if (acl_set_file(name, ACL_TYPE_DEFAULT,
779 EXTATTR_CONTENT(eap)) != -1) {
780 dprintf(stdout, " (set using acl_set_file)");
781 continue;
782 }
783 }
784 vprintf(stdout, " (unable to set)");
785 }
786 vprintf(stdout, "\n");
787 }
788
789 /*
790 * Set attributes for a symbolic link.
791 */
792 static void
set_extattr_link(char * name,void * buf,int size)793 set_extattr_link(char *name, void *buf, int size)
794 {
795 struct extattr *eap, *eaend;
796
797 vprintf(stdout, "Set attributes for %s:", name);
798 eaend = buf + size;
799 for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) {
800 /*
801 * Make sure this entry is complete.
802 */
803 if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) {
804 dprintf(stdout, "\n\t%scorrupted",
805 eap == buf ? "" : "remainder ");
806 break;
807 }
808 if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY)
809 continue;
810 vprintf(stdout, "\n\t%s, (%d bytes), %*s",
811 namespace_names[eap->ea_namespace], eap->ea_length,
812 eap->ea_namelength, eap->ea_name);
813 /*
814 * First we try the general attribute setting interface.
815 * However, some attributes can only be set by root or
816 * by using special interfaces (for example, ACLs).
817 */
818 if (extattr_set_link(name, eap->ea_namespace, eap->ea_name,
819 EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) {
820 dprintf(stdout, " (set using extattr_set_link)");
821 continue;
822 }
823 /*
824 * If the general interface refuses to set the attribute,
825 * then we try all the specialized interfaces that we
826 * know about.
827 */
828 if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
829 !strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) {
830 if (acl_set_link_np(name, ACL_TYPE_ACCESS,
831 EXTATTR_CONTENT(eap)) != -1) {
832 dprintf(stdout, " (set using acl_set_link_np)");
833 continue;
834 }
835 }
836 if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
837 !strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) {
838 if (acl_set_link_np(name, ACL_TYPE_DEFAULT,
839 EXTATTR_CONTENT(eap)) != -1) {
840 dprintf(stdout, " (set using acl_set_link_np)");
841 continue;
842 }
843 }
844 vprintf(stdout, " (unable to set)");
845 }
846 vprintf(stdout, "\n");
847 }
848
849 /*
850 * Set attributes on a file descriptor.
851 */
852 static void
set_extattr_fd(int fd,char * name,void * buf,int size)853 set_extattr_fd(int fd, char *name, void *buf, int size)
854 {
855 struct extattr *eap, *eaend;
856
857 vprintf(stdout, "Set attributes for %s:", name);
858 eaend = buf + size;
859 for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) {
860 /*
861 * Make sure this entry is complete.
862 */
863 if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) {
864 dprintf(stdout, "\n\t%scorrupted",
865 eap == buf ? "" : "remainder ");
866 break;
867 }
868 if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY)
869 continue;
870 vprintf(stdout, "\n\t%s, (%d bytes), %*s",
871 namespace_names[eap->ea_namespace], eap->ea_length,
872 eap->ea_namelength, eap->ea_name);
873 /*
874 * First we try the general attribute setting interface.
875 * However, some attributes can only be set by root or
876 * by using special interfaces (for example, ACLs).
877 */
878 if (extattr_set_fd(fd, eap->ea_namespace, eap->ea_name,
879 EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) {
880 dprintf(stdout, " (set using extattr_set_fd)");
881 continue;
882 }
883 /*
884 * If the general interface refuses to set the attribute,
885 * then we try all the specialized interfaces that we
886 * know about.
887 */
888 if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
889 !strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) {
890 if (acl_set_fd(fd, EXTATTR_CONTENT(eap)) != -1) {
891 dprintf(stdout, " (set using acl_set_fd)");
892 continue;
893 }
894 }
895 if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
896 !strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) {
897 if (acl_set_file(name, ACL_TYPE_DEFAULT,
898 EXTATTR_CONTENT(eap)) != -1) {
899 dprintf(stdout, " (set using acl_set_file)");
900 continue;
901 }
902 }
903 vprintf(stdout, " (unable to set)");
904 }
905 vprintf(stdout, "\n");
906 }
907
908 /*
909 * skip over bit maps on the tape
910 */
911 void
skipmaps(void)912 skipmaps(void)
913 {
914
915 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
916 skipfile();
917 }
918
919 /*
920 * skip over a file on the tape
921 */
922 void
skipfile(void)923 skipfile(void)
924 {
925
926 curfile.action = SKIP;
927 getfile(xtrnull, xtrnull, xtrnull);
928 }
929
930 /*
931 * Skip a hole in an output file
932 */
933 static void
skiphole(void (* skip)(char *,long),long * seekpos)934 skiphole(void (*skip)(char *, long), long *seekpos)
935 {
936 char buf[MAXBSIZE];
937
938 if (*seekpos > 0) {
939 (*skip)(buf, *seekpos);
940 *seekpos = 0;
941 }
942 }
943
944 /*
945 * Extract a file from the tape.
946 * When an allocated block is found it is passed to the fill function;
947 * when an unallocated block (hole) is found, a zeroed buffer is passed
948 * to the skip function.
949 */
950 void
getfile(void (* datafill)(char *,long),void (* attrfill)(char *,long),void (* skip)(char *,long))951 getfile(void (*datafill)(char *, long), void (*attrfill)(char *, long),
952 void (*skip)(char *, long))
953 {
954 int i;
955 off_t size;
956 long seekpos;
957 int curblk, attrsize;
958 void (*fillit)(char *, long);
959 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
960 char junk[TP_BSIZE];
961
962 curblk = 0;
963 size = spcl.c_size;
964 seekpos = 0;
965 attrsize = spcl.c_extsize;
966 if (spcl.c_type == TS_END)
967 panic("ran off end of tape\n");
968 if (spcl.c_magic != FS_UFS2_MAGIC)
969 panic("not at beginning of a file\n");
970 if (!gettingfile && setjmp(restart) != 0)
971 return;
972 gettingfile++;
973 fillit = datafill;
974 if (size == 0 && attrsize > 0) {
975 fillit = attrfill;
976 size = attrsize;
977 attrsize = 0;
978 }
979 loop:
980 for (i = 0; i < spcl.c_count; i++) {
981 if (!readmapflag && i > TP_NINDIR) {
982 if (Dflag) {
983 fprintf(stderr, "spcl.c_count = %jd\n",
984 (intmax_t)spcl.c_count);
985 break;
986 } else
987 panic("spcl.c_count = %jd\n",
988 (intmax_t)spcl.c_count);
989 }
990 if (readmapflag || spcl.c_addr[i]) {
991 readtape(&buf[curblk++][0]);
992 if (curblk == fssize / TP_BSIZE) {
993 skiphole(skip, &seekpos);
994 (*fillit)((char *)buf, (long)(size > TP_BSIZE ?
995 fssize : (curblk - 1) * TP_BSIZE + size));
996 curblk = 0;
997 }
998 } else {
999 if (curblk > 0) {
1000 skiphole(skip, &seekpos);
1001 (*fillit)((char *)buf, (long)(size > TP_BSIZE ?
1002 curblk * TP_BSIZE :
1003 (curblk - 1) * TP_BSIZE + size));
1004 curblk = 0;
1005 }
1006 /*
1007 * We have a block of a hole. Don't skip it
1008 * now, because there may be next adjacent
1009 * block of the hole in the file. Postpone the
1010 * seek until next file write.
1011 */
1012 seekpos += (long)(size > TP_BSIZE ? TP_BSIZE : size);
1013 }
1014 if ((size -= TP_BSIZE) <= 0) {
1015 if (size > -TP_BSIZE && curblk > 0) {
1016 skiphole(skip, &seekpos);
1017 (*fillit)((char *)buf,
1018 (long)((curblk * TP_BSIZE) + size));
1019 curblk = 0;
1020 }
1021 if (attrsize > 0) {
1022 fillit = attrfill;
1023 size = attrsize;
1024 attrsize = 0;
1025 continue;
1026 }
1027 if (spcl.c_count - i > 1)
1028 dprintf(stdout, "skipping %d junk block(s)\n",
1029 spcl.c_count - i - 1);
1030 for (i++; i < spcl.c_count; i++) {
1031 if (!readmapflag && i > TP_NINDIR) {
1032 if (Dflag) {
1033 fprintf(stderr,
1034 "spcl.c_count = %jd\n",
1035 (intmax_t)spcl.c_count);
1036 break;
1037 } else
1038 panic("spcl.c_count = %jd\n",
1039 (intmax_t)spcl.c_count);
1040 }
1041 if (readmapflag || spcl.c_addr[i])
1042 readtape(junk);
1043 }
1044 break;
1045 }
1046 }
1047 if (gethead(&spcl) == GOOD && size > 0) {
1048 if (spcl.c_type == TS_ADDR)
1049 goto loop;
1050 dprintf(stdout,
1051 "Missing address (header) block for %s at %ld blocks\n",
1052 curfile.name, blksread);
1053 }
1054 if (curblk > 0)
1055 panic("getfile: lost data\n");
1056 findinode(&spcl);
1057 gettingfile = 0;
1058 }
1059
1060 /*
1061 * These variables are shared between the next two functions.
1062 */
1063 static int extbufsize = 0;
1064 static char *extbuf;
1065 static int extloc;
1066
1067 /*
1068 * Allocate a buffer into which to extract extended attributes.
1069 */
1070 static char *
setupextattr(int extsize)1071 setupextattr(int extsize)
1072 {
1073
1074 extloc = 0;
1075 if (extsize <= extbufsize)
1076 return (extbuf);
1077 if (extbufsize > 0)
1078 free(extbuf);
1079 if ((extbuf = malloc(extsize)) != NULL) {
1080 extbufsize = extsize;
1081 return (extbuf);
1082 }
1083 extbufsize = 0;
1084 extbuf = NULL;
1085 fprintf(stderr, "Cannot extract %d bytes %s for inode %ju, name %s\n",
1086 extsize, "of extended attributes", (uintmax_t)curfile.ino,
1087 curfile.name);
1088 return (NULL);
1089 }
1090
1091 /*
1092 * Extract the next block of extended attributes.
1093 */
1094 static void
xtrattr(char * buf,long size)1095 xtrattr(char *buf, long size)
1096 {
1097
1098 if (extloc + size > extbufsize)
1099 panic("overrun attribute buffer\n");
1100 memmove(&extbuf[extloc], buf, size);
1101 extloc += size;
1102 }
1103
1104 /*
1105 * Write out the next block of a file.
1106 */
1107 static void
xtrfile(char * buf,long size)1108 xtrfile(char *buf, long size)
1109 {
1110
1111 if (Nflag)
1112 return;
1113 if (write(ofile, buf, (int) size) == -1) {
1114 fprintf(stderr,
1115 "write error extracting inode %ju, name %s\nwrite: %s\n",
1116 (uintmax_t)curfile.ino, curfile.name, strerror(errno));
1117 }
1118 }
1119
1120 /*
1121 * Skip over a hole in a file.
1122 */
1123 /* ARGSUSED */
1124 static void
xtrskip(char * buf,long size)1125 xtrskip(char *buf, long size)
1126 {
1127
1128 if (lseek(ofile, size, SEEK_CUR) == -1) {
1129 fprintf(stderr,
1130 "seek error extracting inode %ju, name %s\nlseek: %s\n",
1131 (uintmax_t)curfile.ino, curfile.name, strerror(errno));
1132 done(1);
1133 }
1134 }
1135
1136 /*
1137 * Collect the next block of a symbolic link.
1138 */
1139 static void
xtrlnkfile(char * buf,long size)1140 xtrlnkfile(char *buf, long size)
1141 {
1142
1143 pathlen += size;
1144 if (pathlen > MAXPATHLEN) {
1145 fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n",
1146 curfile.name, lnkbuf, buf, pathlen);
1147 done(1);
1148 }
1149 (void) strcat(lnkbuf, buf);
1150 }
1151
1152 /*
1153 * Skip over a hole in a symbolic link (should never happen).
1154 */
1155 /* ARGSUSED */
1156 static void
xtrlnkskip(char * buf,long size)1157 xtrlnkskip(char *buf, long size)
1158 {
1159
1160 fprintf(stderr, "unallocated block in symbolic link %s\n",
1161 curfile.name);
1162 done(1);
1163 }
1164
1165 /*
1166 * Collect the next block of a bit map.
1167 */
1168 static void
xtrmap(char * buf,long size)1169 xtrmap(char *buf, long size)
1170 {
1171
1172 memmove(map, buf, size);
1173 map += size;
1174 }
1175
1176 /*
1177 * Skip over a hole in a bit map (should never happen).
1178 */
1179 /* ARGSUSED */
1180 static void
xtrmapskip(char * buf,long size)1181 xtrmapskip(char *buf, long size)
1182 {
1183
1184 panic("hole in map\n");
1185 map += size;
1186 }
1187
1188 /*
1189 * Noop, when an extraction function is not needed.
1190 */
1191 /* ARGSUSED */
1192 void
xtrnull(char * buf,long size)1193 xtrnull(char *buf, long size)
1194 {
1195
1196 return;
1197 }
1198
1199 /*
1200 * Read TP_BSIZE blocks from the input.
1201 * Handle read errors, and end of media.
1202 */
1203 static void
readtape(char * buf)1204 readtape(char *buf)
1205 {
1206 long rd, newvol, i, oldnumtrec;
1207 int cnt, seek_failed;
1208
1209 if (blkcnt + (byteslide > 0) < numtrec) {
1210 memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE) + byteslide], (long)TP_BSIZE);
1211 blksread++;
1212 tapeaddr++;
1213 return;
1214 }
1215 if (numtrec > 0)
1216 memmove(&tapebuf[-TP_BSIZE],
1217 &tapebuf[(numtrec-1) * TP_BSIZE], (long)TP_BSIZE);
1218 oldnumtrec = numtrec;
1219 for (i = 0; i < ntrec; i++)
1220 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1221 if (numtrec == 0)
1222 numtrec = ntrec;
1223 cnt = ntrec * TP_BSIZE;
1224 rd = 0;
1225 getmore:
1226 #ifdef RRESTORE
1227 if (host)
1228 i = rmtread(&tapebuf[rd], cnt);
1229 else
1230 #endif
1231 i = read(mt, &tapebuf[rd], cnt);
1232 /*
1233 * Check for mid-tape short read error.
1234 * If found, skip rest of buffer and start with the next.
1235 */
1236 if (!pipein && !pipecmdin && numtrec < ntrec && i > 0) {
1237 dprintf(stdout, "mid-media short read error.\n");
1238 numtrec = ntrec;
1239 }
1240 /*
1241 * Handle partial block read.
1242 */
1243 if ((pipein || pipecmdin) && i == 0 && rd > 0)
1244 i = rd;
1245 else if (i > 0 && i != ntrec * TP_BSIZE) {
1246 if (pipein || pipecmdin) {
1247 rd += i;
1248 cnt -= i;
1249 if (cnt > 0)
1250 goto getmore;
1251 i = rd;
1252 } else {
1253 /*
1254 * Short read. Process the blocks read.
1255 */
1256 if (i % TP_BSIZE != 0)
1257 vprintf(stdout,
1258 "partial block read: %ld should be %ld\n",
1259 i, ntrec * TP_BSIZE);
1260 numtrec = i / TP_BSIZE;
1261 }
1262 }
1263 /*
1264 * Handle read error.
1265 */
1266 if (i < 0) {
1267 fprintf(stderr, "Tape read error while ");
1268 switch (curfile.action) {
1269 default:
1270 fprintf(stderr, "trying to set up tape\n");
1271 break;
1272 case UNKNOWN:
1273 fprintf(stderr, "trying to resynchronize\n");
1274 break;
1275 case USING:
1276 fprintf(stderr, "restoring %s\n", curfile.name);
1277 break;
1278 case SKIP:
1279 fprintf(stderr, "skipping over inode %ju\n",
1280 (uintmax_t)curfile.ino);
1281 break;
1282 }
1283 if (!yflag && !reply("continue"))
1284 done(1);
1285 i = ntrec * TP_BSIZE;
1286 memset(tapebuf, 0, i);
1287 #ifdef RRESTORE
1288 if (host)
1289 seek_failed = (rmtseek(i, 1) < 0);
1290 else
1291 #endif
1292 seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1);
1293
1294 if (seek_failed) {
1295 fprintf(stderr,
1296 "continuation failed: %s\n", strerror(errno));
1297 done(1);
1298 }
1299 }
1300 /*
1301 * Handle end of tape.
1302 */
1303 if (i == 0) {
1304 vprintf(stdout, "End-of-tape encountered\n");
1305 if (!pipein) {
1306 newvol = volno + 1;
1307 volno = 0;
1308 numtrec = 0;
1309 getvol(newvol);
1310 readtape(buf);
1311 return;
1312 }
1313 if (rd % TP_BSIZE != 0)
1314 panic("partial block read: %ld should be %ld\n",
1315 rd, ntrec * TP_BSIZE);
1316 terminateinput();
1317 memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE);
1318 }
1319 if (oldnumtrec == 0)
1320 blkcnt = 0;
1321 else
1322 blkcnt -= oldnumtrec;
1323 memmove(buf,
1324 &tapebuf[(blkcnt++ * TP_BSIZE) + byteslide], (long)TP_BSIZE);
1325 blksread++;
1326 tapeaddr++;
1327 }
1328
1329 static void
findtapeblksize(void)1330 findtapeblksize(void)
1331 {
1332 long i;
1333
1334 for (i = 0; i < ntrec; i++)
1335 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1336 blkcnt = 0;
1337 #ifdef RRESTORE
1338 if (host)
1339 i = rmtread(tapebuf, ntrec * TP_BSIZE);
1340 else
1341 #endif
1342 i = read(mt, tapebuf, ntrec * TP_BSIZE);
1343
1344 if (i <= 0) {
1345 fprintf(stderr, "tape read error: %s\n", strerror(errno));
1346 done(1);
1347 }
1348 if (i % TP_BSIZE != 0) {
1349 fprintf(stderr, "Tape block size (%ld) %s (%d)\n",
1350 i, "is not a multiple of dump block size", TP_BSIZE);
1351 done(1);
1352 }
1353 ntrec = i / TP_BSIZE;
1354 numtrec = ntrec;
1355 vprintf(stdout, "Tape block size is %ld\n", ntrec);
1356 }
1357
1358 void
closemt(void)1359 closemt(void)
1360 {
1361
1362 if (mt < 0)
1363 return;
1364 if (pipecmdin) {
1365 pclose(popenfp);
1366 popenfp = NULL;
1367 } else
1368 #ifdef RRESTORE
1369 if (host)
1370 rmtclose();
1371 else
1372 #endif
1373 (void) close(mt);
1374 }
1375
1376 /*
1377 * Read the next block from the tape.
1378 * If it is not any valid header, return an error.
1379 */
1380 static int
gethead(struct s_spcl * buf)1381 gethead(struct s_spcl *buf)
1382 {
1383 long i;
1384
1385 readtape((char *)buf);
1386 if (buf->c_magic != FS_UFS2_MAGIC && buf->c_magic != NFS_MAGIC) {
1387 if (buf->c_magic == OFS_MAGIC) {
1388 fprintf(stderr,
1389 "Format of dump tape is too old. Must use\n");
1390 fprintf(stderr,
1391 "a version of restore from before 2002.\n");
1392 return (FAIL);
1393 }
1394 if (swabl(buf->c_magic) != FS_UFS2_MAGIC &&
1395 buf->c_magic != NFS_MAGIC) {
1396 if (buf->c_magic == OFS_MAGIC) {
1397 fprintf(stderr,
1398 "Format of dump tape is too old. Must use\n");
1399 fprintf(stderr,
1400 "a version of restore from before 2002.\n");
1401 }
1402 return (FAIL);
1403 }
1404 if (!Bcvt) {
1405 vprintf(stdout, "Note: Doing Byte swapping\n");
1406 Bcvt = 1;
1407 }
1408 }
1409 if (checksum((int *)buf) == FAIL)
1410 return (FAIL);
1411 if (Bcvt) {
1412 swabst((u_char *)"8l4s1q8l2q17l", (u_char *)buf);
1413 swabst((u_char *)"l",(u_char *) &buf->c_level);
1414 swabst((u_char *)"2l4q",(u_char *) &buf->c_flags);
1415 }
1416 readmapflag = 0;
1417
1418 switch (buf->c_type) {
1419
1420 case TS_CLRI:
1421 case TS_BITS:
1422 /*
1423 * Have to patch up missing information in bit map headers
1424 */
1425 buf->c_size = buf->c_count * TP_BSIZE;
1426 if (buf->c_count > TP_NINDIR)
1427 readmapflag = 1;
1428 else
1429 for (i = 0; i < buf->c_count; i++)
1430 buf->c_addr[i]++;
1431 /* FALL THROUGH */
1432
1433 case TS_TAPE:
1434 if (buf->c_magic == NFS_MAGIC &&
1435 (buf->c_flags & NFS_DR_NEWINODEFMT) == 0)
1436 oldinofmt = 1;
1437 /* FALL THROUGH */
1438
1439 case TS_END:
1440 buf->c_inumber = 0;
1441 /* FALL THROUGH */
1442
1443 case TS_ADDR:
1444 case TS_INODE:
1445 /*
1446 * For old dump tapes, have to copy up old fields to
1447 * new locations.
1448 */
1449 if (buf->c_magic == NFS_MAGIC) {
1450 buf->c_tapea = buf->c_old_tapea;
1451 buf->c_firstrec = buf->c_old_firstrec;
1452 buf->c_date = _time32_to_time(buf->c_old_date);
1453 buf->c_ddate = _time32_to_time(buf->c_old_ddate);
1454 buf->c_atime = _time32_to_time(buf->c_old_atime);
1455 buf->c_mtime = _time32_to_time(buf->c_old_mtime);
1456 buf->c_birthtime = 0;
1457 buf->c_birthtimensec = 0;
1458 buf->c_extsize = 0;
1459 }
1460 break;
1461
1462 default:
1463 panic("gethead: unknown inode type %d\n", buf->c_type);
1464 break;
1465 }
1466 if (dumpdate != 0 && _time64_to_time(buf->c_date) != dumpdate)
1467 fprintf(stderr, "Header with wrong dumpdate.\n");
1468 /*
1469 * If we're restoring a filesystem with the old (FreeBSD 1)
1470 * format inodes, copy the uid/gid to the new location
1471 */
1472 if (oldinofmt) {
1473 buf->c_uid = buf->c_spare1[1];
1474 buf->c_gid = buf->c_spare1[2];
1475 }
1476 buf->c_magic = FS_UFS2_MAGIC;
1477 tapeaddr = buf->c_tapea;
1478 if (dflag)
1479 accthdr(buf);
1480 return(GOOD);
1481 }
1482
1483 /*
1484 * Check that a header is where it belongs and predict the next header
1485 */
1486 static void
accthdr(struct s_spcl * header)1487 accthdr(struct s_spcl *header)
1488 {
1489 static ino_t previno = 0x7fffffff;
1490 static int prevtype;
1491 static long predict;
1492 long blks, i;
1493
1494 if (header->c_type == TS_TAPE) {
1495 fprintf(stderr, "Volume header ");
1496 if (header->c_firstrec)
1497 fprintf(stderr, "begins with record %jd",
1498 (intmax_t)header->c_firstrec);
1499 fprintf(stderr, "\n");
1500 previno = 0x7fffffff;
1501 return;
1502 }
1503 if (previno == 0x7fffffff)
1504 goto newcalc;
1505 switch (prevtype) {
1506 case TS_BITS:
1507 fprintf(stderr, "Dumped inodes map header");
1508 break;
1509 case TS_CLRI:
1510 fprintf(stderr, "Used inodes map header");
1511 break;
1512 case TS_INODE:
1513 fprintf(stderr, "File header, ino %ju", (uintmax_t)previno);
1514 break;
1515 case TS_ADDR:
1516 fprintf(stderr, "File continuation header, ino %ju",
1517 (uintmax_t)previno);
1518 break;
1519 case TS_END:
1520 fprintf(stderr, "End of tape header");
1521 break;
1522 }
1523 if (predict != blksread - 1)
1524 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
1525 predict, blksread - 1);
1526 fprintf(stderr, "\n");
1527 newcalc:
1528 blks = 0;
1529 if (header->c_type != TS_END)
1530 for (i = 0; i < header->c_count; i++)
1531 if (readmapflag || header->c_addr[i] != 0)
1532 blks++;
1533 predict = blks;
1534 blksread = 0;
1535 prevtype = header->c_type;
1536 previno = header->c_inumber;
1537 }
1538
1539 /*
1540 * Find an inode header.
1541 * Complain if had to skip.
1542 */
1543 static void
findinode(struct s_spcl * header)1544 findinode(struct s_spcl *header)
1545 {
1546 static long skipcnt = 0;
1547 long i;
1548 char buf[TP_BSIZE];
1549 int htype;
1550
1551 curfile.name = "<name unknown>";
1552 curfile.action = UNKNOWN;
1553 curfile.mode = 0;
1554 curfile.ino = 0;
1555 do {
1556 htype = header->c_type;
1557 switch (htype) {
1558
1559 case TS_ADDR:
1560 /*
1561 * Skip up to the beginning of the next record
1562 */
1563 for (i = 0; i < header->c_count; i++)
1564 if (header->c_addr[i])
1565 readtape(buf);
1566 while (gethead(header) == FAIL ||
1567 _time64_to_time(header->c_date) != dumpdate) {
1568 skipcnt++;
1569 if (Dflag) {
1570 byteslide++;
1571 if (byteslide < TP_BSIZE) {
1572 blkcnt--;
1573 blksread--;
1574 } else
1575 byteslide = 0;
1576 }
1577 }
1578 break;
1579
1580 case TS_INODE:
1581 curfile.mode = header->c_mode;
1582 curfile.uid = header->c_uid;
1583 curfile.gid = header->c_gid;
1584 curfile.file_flags = header->c_file_flags;
1585 curfile.rdev = header->c_rdev;
1586 curfile.atime_sec = header->c_atime;
1587 curfile.atime_nsec = header->c_atimensec;
1588 curfile.mtime_sec = header->c_mtime;
1589 curfile.mtime_nsec = header->c_mtimensec;
1590 curfile.birthtime_sec = header->c_birthtime;
1591 curfile.birthtime_nsec = header->c_birthtimensec;
1592 curfile.extsize = header->c_extsize;
1593 curfile.size = header->c_size;
1594 curfile.ino = header->c_inumber;
1595 break;
1596
1597 case TS_END:
1598 /* If we missed some tapes, get another volume. */
1599 if (tapesread & (tapesread + 1)) {
1600 getvol(0);
1601 continue;
1602 }
1603 curfile.ino = maxino;
1604 break;
1605
1606 case TS_CLRI:
1607 curfile.name = "<file removal list>";
1608 break;
1609
1610 case TS_BITS:
1611 curfile.name = "<file dump list>";
1612 break;
1613
1614 case TS_TAPE:
1615 if (Dflag)
1616 fprintf(stderr, "unexpected tape header\n");
1617 else
1618 panic("unexpected tape header\n");
1619
1620 default:
1621 if (Dflag)
1622 fprintf(stderr, "unknown tape header type %d\n",
1623 spcl.c_type);
1624 else
1625 panic("unknown tape header type %d\n",
1626 spcl.c_type);
1627 while (gethead(header) == FAIL ||
1628 _time64_to_time(header->c_date) != dumpdate) {
1629 skipcnt++;
1630 if (Dflag) {
1631 byteslide++;
1632 if (byteslide < TP_BSIZE) {
1633 blkcnt--;
1634 blksread--;
1635 } else
1636 byteslide = 0;
1637 }
1638 }
1639
1640 }
1641 } while (htype == TS_ADDR);
1642 if (skipcnt > 0)
1643 fprintf(stderr, "resync restore, skipped %ld %s\n",
1644 skipcnt, Dflag ? "bytes" : "blocks");
1645 skipcnt = 0;
1646 }
1647
1648 static int
checksum(int * buf)1649 checksum(int *buf)
1650 {
1651 int i, j;
1652
1653 j = sizeof(union u_spcl) / sizeof(int);
1654 i = 0;
1655 if (!Bcvt) {
1656 do
1657 i += *buf++;
1658 while (--j);
1659 } else {
1660 /* What happens if we want to read restore tapes
1661 for a 16bit int machine??? */
1662 do
1663 i += swabl(*buf++);
1664 while (--j);
1665 }
1666
1667 if (i != CHECKSUM) {
1668 fprintf(stderr, "Checksum error %o, inode %ju file %s\n", i,
1669 (uintmax_t)curfile.ino, curfile.name);
1670 return(FAIL);
1671 }
1672 return(GOOD);
1673 }
1674
1675 #ifdef RRESTORE
1676 #include <stdarg.h>
1677
1678 void
msg(const char * fmt,...)1679 msg(const char *fmt, ...)
1680 {
1681 va_list ap;
1682 va_start(ap, fmt);
1683 (void)vfprintf(stderr, fmt, ap);
1684 va_end(ap);
1685 }
1686 #endif /* RRESTORE */
1687
1688 static u_char *
swabshort(u_char * sp,int n)1689 swabshort(u_char *sp, int n)
1690 {
1691 char c;
1692
1693 while (--n >= 0) {
1694 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
1695 sp += 2;
1696 }
1697 return (sp);
1698 }
1699
1700 static u_char *
swablong(u_char * sp,int n)1701 swablong(u_char *sp, int n)
1702 {
1703 char c;
1704
1705 while (--n >= 0) {
1706 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
1707 c = sp[2]; sp[2] = sp[1]; sp[1] = c;
1708 sp += 4;
1709 }
1710 return (sp);
1711 }
1712
1713 static u_char *
swabquad(u_char * sp,int n)1714 swabquad(u_char *sp, int n)
1715 {
1716 char c;
1717
1718 while (--n >= 0) {
1719 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
1720 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
1721 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
1722 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
1723 sp += 8;
1724 }
1725 return (sp);
1726 }
1727
1728 void
swabst(u_char * cp,u_char * sp)1729 swabst(u_char *cp, u_char *sp)
1730 {
1731 int n = 0;
1732
1733 while (*cp) {
1734 switch (*cp) {
1735 case '0': case '1': case '2': case '3': case '4':
1736 case '5': case '6': case '7': case '8': case '9':
1737 n = (n * 10) + (*cp++ - '0');
1738 continue;
1739
1740 case 's': case 'w': case 'h':
1741 if (n == 0)
1742 n = 1;
1743 sp = swabshort(sp, n);
1744 break;
1745
1746 case 'l':
1747 if (n == 0)
1748 n = 1;
1749 sp = swablong(sp, n);
1750 break;
1751
1752 case 'q':
1753 if (n == 0)
1754 n = 1;
1755 sp = swabquad(sp, n);
1756 break;
1757
1758 case 'b':
1759 if (n == 0)
1760 n = 1;
1761 sp += n;
1762 break;
1763
1764 default:
1765 fprintf(stderr, "Unknown conversion character: %c\n",
1766 *cp);
1767 done(0);
1768 break;
1769 }
1770 cp++;
1771 n = 0;
1772 }
1773 }
1774
1775 static u_long
swabl(u_long x)1776 swabl(u_long x)
1777 {
1778 swabst((u_char *)"l", (u_char *)&x);
1779 return (x);
1780 }
1781