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Improvements to cron_dump_to_disk
[dump.git] / restore / tape.c
1 /*
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 <stelian@popies.net>, 1999-2000
6 * Stelian Pop <stelian@popies.net> - Alcôve <www.alcove.com>, 2000-2002
7 */
8
9 /*
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.
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
20 * are met:
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. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * SUCH DAMAGE.
41 */
42
43 #ifndef lint
44 static const char rcsid[] =
45 "$Id: tape.c,v 1.92 2007/02/22 20:16:23 stelian Exp $";
46 #endif /* not lint */
47
48 #include <config.h>
49 #include <compatlfs.h>
50 #include <sys/types.h>
51 #include <errno.h>
52 #include <compaterr.h>
53 #include <system.h>
54 #include <setjmp.h>
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <string.h>
58 #include <unistd.h>
59
60 #include <sys/param.h>
61 #include <sys/file.h>
62 #include <sys/mtio.h>
63 #include <sys/stat.h>
64
65 #ifdef __linux__
66 #include <sys/time.h>
67 #include <time.h>
68 #ifdef HAVE_EXT2FS_EXT2_FS_H
69 #include <ext2fs/ext2_fs.h>
70 #else
71 #include <linux/ext2_fs.h>
72 #endif
73 #include <ext2fs/ext2fs.h>
74 #include <bsdcompat.h>
75 #else /* __linux__ */
76 #ifdef sunos
77 #define quad_t int64_t
78 #include <sys/time.h>
79 #include <sys/fcntl.h>
80 #include <bsdcompat.h>
81 #else
82 #include <ufs/ufs/dinode.h>
83 #endif
84 #endif /* __linux__ */
85 #ifdef DUMP_MACOSX
86 #include "darwin.h"
87 #endif
88 #include <protocols/dumprestore.h>
89
90 #ifdef HAVE_ZLIB
91 #include <zlib.h>
92 #endif /* HAVE_ZLIB */
93
94 #ifdef HAVE_BZLIB
95 #include <bzlib.h>
96 #endif /* HAVE_BZLIB */
97
98 #ifdef HAVE_LZO
99 #include <minilzo.h>
100 #endif /* HAVE_LZO */
101
102 #include "restore.h"
103 #include "extern.h"
104 #include "pathnames.h"
105
106 #ifdef USE_QFA
107 int noresyncmesg = 0;
108 #endif /* USE_QFA */
109 static long fssize = MAXBSIZE;
110 static int mt = -1;
111 int pipein = 0;
112 static int magtapein = 0; /* input is from magtape */
113 static char magtape[MAXPATHLEN];
114 static char magtapeprefix[MAXPATHLEN];
115 static int blkcnt;
116 static int numtrec;
117 static char *tapebuf; /* input buffer for read */
118 static int bufsize; /* buffer size without prefix */
119 static char *tbufptr = NULL; /* active tape buffer */
120 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
121 static char *comprbuf; /* uncompress work buf */
122 static size_t comprlen; /* size including prefix */
123 #endif
124 static union u_spcl endoftapemark;
125 static long blksread; /* blocks read since last header */
126 static long tpblksread = 0; /* TP_BSIZE blocks read */
127 static long tapesread;
128 static sigjmp_buf restart;
129 static int gettingfile = 0; /* restart has a valid frame */
130 char *host = NULL;
131
132 static int ofile;
133 static char *map;
134 static char lnkbuf[MAXPATHLEN + 1];
135 static int pathlen;
136
137 int oldinofmt; /* old inode format conversion required */
138 int Bcvt; /* Swap Bytes (for CCI or sun) */
139 static int Qcvt; /* Swap quads (for sun) */
140
141 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
142
143 static void accthdr __P((struct s_spcl *));
144 static int checksum __P((int *));
145 static void findinode __P((struct s_spcl *));
146 static void findtapeblksize __P((void));
147 static int gethead __P((struct s_spcl *));
148 static int converthead __P((struct s_spcl *));
149 static void converttapebuf __P((struct tapebuf *));
150 static void readtape __P((char *));
151 static void setdumpnum __P((void));
152 #ifdef DUMP_MACOSX
153 static void xtrfilefinderinfo __P((char *, size_t));
154 #endif
155
156 static u_int swabi __P((u_int));
157 #if 0
158 static u_long swabl __P((u_long));
159 #endif
160 static u_char *swab64 __P((u_char *, int));
161 static u_char *swab32 __P((u_char *, int));
162 static u_char *swab16 __P((u_char *, int));
163 static void terminateinput __P((void));
164 static void xtrfile __P((char *, size_t));
165 static void xtrlnkfile __P((char *, size_t));
166 static void xtrlnkskip __P((char *, size_t));
167 static void xtrmap __P((char *, size_t));
168 static void xtrmapskip __P((char *, size_t));
169 static void xtrskip __P((char *, size_t));
170 static void xtrxattr __P((char *, size_t));
171 static void setmagtapein __P((void));
172 static int extractattr __P((char *));
173 static void compareattr __P((char *));
174
175 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
176 static void newcomprbuf __P((int));
177 static void (*readtape_func) __P((char *));
178 static void readtape_set __P((char *));
179 static void readtape_uncompr __P((char *));
180 static void readtape_comprfile __P((char *));
181 static void readtape_comprtape __P((char *));
182 static char *decompress_tapebuf __P((struct tapebuf *, int));
183 static void msg_read_error __P((char *));
184 #endif
185 static int read_a_block __P((int, char *, size_t, long *));
186 #define PREFIXSIZE sizeof(struct tapebuf)
187
188 #define COMPARE_ONTHEFLY 1
189
190 #if COMPARE_ONTHEFLY
191 static int ifile; /* input file for compare */
192 static int cmperror; /* compare error */
193 static void xtrcmpfile __P((char *, size_t));
194 static void xtrcmpskip __P((char *, size_t));
195 #endif
196
197 static int readmapflag;
198 static int readingmaps; /* set to 1 while reading the maps */
199
200 static char xattrbuf[XATTR_MAXSIZE];
201 static int xattrlen;
202
203 #ifdef DUMP_MACOSX
204 static DumpFinderInfo gFndrInfo;
205 #endif
206
207 /*
208 * Set up an input source. This is called from main.c before setup() is.
209 */
210 void
211 setinput(char *source)
212 {
213 int i;
214 char *n;
215
216 FLUSHTAPEBUF();
217 if (bflag)
218 newtapebuf(ntrec);
219 else
220 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
221 terminal = stdin;
222
223 #ifdef RRESTORE
224 if ((n = strchr(source, ':'))) {
225 for (i = 0; i < (n - source); i++) {
226 if (source[i] == '/')
227 break;
228 }
229 if (source[i] != '/') {
230 host = source;
231 source = strchr(host, ':');
232 *source++ = '\0';
233 if (rmthost(host) == 0)
234 exit(1);
235 }
236 } else
237 #endif
238 if (strcmp(source, "-") == 0) {
239 /*
240 * Since input is coming from a pipe we must establish
241 * our own connection to the terminal.
242 */
243 terminal = fopen(_PATH_TTY, "r");
244 if (terminal == NULL) {
245 warn("cannot open %s", _PATH_TTY);
246 terminal = fopen(_PATH_DEVNULL, "r");
247 if (terminal == NULL)
248 err(1, "cannot open %s", _PATH_DEVNULL);
249 }
250 pipein++;
251 }
252 setuid(getuid()); /* no longer need or want root privileges */
253 if (Mflag) {
254 strncpy(magtapeprefix, source, MAXPATHLEN);
255 magtapeprefix[MAXPATHLEN-1] = '\0';
256 snprintf(magtape, MAXPATHLEN, "%s%03d", source, 1);
257 }
258 else
259 strncpy(magtape, source, MAXPATHLEN);
260 magtape[MAXPATHLEN - 1] = '\0';
261 }
262
263 void
264 newtapebuf(long size)
265 {
266 static int tapebufsize = -1;
267
268 ntrec = size;
269 bufsize = ntrec * TP_BSIZE;
270 if (size <= tapebufsize)
271 return;
272 if (tapebuf != NULL)
273 free(tapebuf);
274 tapebuf = malloc(size * TP_BSIZE + sizeof(struct tapebuf));
275 if (tapebuf == NULL)
276 errx(1, "Cannot allocate space for tape buffer");
277 tapebufsize = size;
278 }
279
280 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
281 static void
282 newcomprbuf(int size)
283 {
284 size_t buf_size = (size+1) * TP_BSIZE + sizeof(struct tapebuf);
285 if (buf_size <= comprlen)
286 return;
287 comprlen = buf_size;
288 if (comprbuf != NULL)
289 free(comprbuf);
290 comprbuf = malloc(comprlen);
291 if (comprbuf == NULL)
292 errx(1, "Cannot allocate space for decompress buffer");
293 }
294 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
295
296 /*
297 * Verify that the tape drive can be accessed and
298 * that it actually is a dump tape.
299 */
300 void
301 setup(void)
302 {
303 int i, j, *ip, bot_code;
304 struct STAT stbuf;
305 char *temptape;
306
307 Vprintf(stdout, "Verify tape and initialize maps\n");
308 if (Afile == NULL && bot_script) {
309 msg("Launching %s\n", bot_script);
310 bot_code = system_command(bot_script, magtape, 1);
311 if (bot_code != 0 && bot_code != 1) {
312 msg("Restore aborted by the beginning of tape script\n");
313 exit(1);
314 }
315 }
316
317 if (Afile)
318 temptape = Afile;
319 else
320 temptape = magtape;
321
322 #ifdef RRESTORE
323 if (!Afile && host)
324 mt = rmtopen(temptape, O_RDONLY);
325 else
326 #endif
327 if (pipein)
328 mt = 0;
329 else
330 mt = OPEN(temptape, O_RDONLY, 0);
331 if (mt < 0)
332 err(1, "%s", temptape);
333 if (!Afile) {
334 volno = 1;
335 setmagtapein();
336 setdumpnum();
337 }
338 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
339 readtape_func = readtape_set;
340 #if defined(HAVE_LZO)
341 if (lzo_init() != LZO_E_OK) {
342 msg("internal error - lzo_init failed \n");
343 exit(1);
344 }
345 #endif
346 #endif
347 FLUSHTAPEBUF();
348 findtapeblksize();
349 cvtflag = 0;
350 if (gethead(&spcl) == FAIL) {
351 blkcnt--; /* push back this block */
352 blksread--;
353 tpblksread--;
354 cvtflag++;
355 if (gethead(&spcl) == FAIL)
356 errx(1, "Tape is not a dump tape");
357 fprintf(stderr, "Converting to new file system format.\n");
358 }
359
360 if (zflag) {
361 fprintf(stderr, "Dump tape is compressed.\n");
362 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB) && !defined(HAVE_LZO)
363 errx(1,"This restore version doesn't support decompression");
364 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
365 }
366 if (pipein) {
367 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC;
368 endoftapemark.s_spcl.c_type = TS_END;
369 ip = (int *)&endoftapemark;
370 j = sizeof(union u_spcl) / sizeof(int);
371 i = 0;
372 do
373 i += *ip++;
374 while (--j);
375 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
376 }
377 if (vflag || command == 't' || command == 'C')
378 printdumpinfo();
379 #ifdef USE_QFA
380 if (tapeposflag && (unsigned long)spcl.c_date != qfadumpdate)
381 errx(1, "different QFA/dumpdates detected\n");
382 #endif
383 if (filesys[0] == '\0') {
384 char *dirptr;
385 strncpy(filesys, spcl.c_filesys, NAMELEN);
386 filesys[NAMELEN - 1] = '\0';
387 dirptr = strstr(filesys, " (dir");
388 if (dirptr != NULL)
389 *dirptr = '\0';
390 }
391 dumptime = spcl.c_ddate;
392 dumpdate = spcl.c_date;
393 if (STAT(".", &stbuf) < 0)
394 err(1, "cannot stat .");
395 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
396 fssize = TP_BSIZE;
397 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
398 fssize = stbuf.st_blksize;
399 if (((fssize - 1) & fssize) != 0)
400 errx(1, "bad block size %ld", fssize);
401 if (spcl.c_volume != 1)
402 errx(1, "Tape is not volume 1 of the dump");
403 if (gethead(&spcl) == FAIL) {
404 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
405 panic("no header after volume mark!\n");
406 }
407 readingmaps = 1;
408 findinode(&spcl);
409 if (spcl.c_type != TS_CLRI)
410 errx(1, "Cannot find file removal list");
411 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
412 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
413 if (map == NULL)
414 errx(1, "no memory for active inode map");
415 usedinomap = map;
416 curfile.action = USING;
417 getfile(xtrmap, xtrmapskip);
418 while (spcl.c_type == TS_ADDR) {
419 /* Recompute maxino and the map */
420 dump_ino_t oldmaxino = maxino;
421 maxino += (spcl.c_count * TP_BSIZE * NBBY) + 1;
422 resizemaps(oldmaxino, maxino);
423 map = usedinomap;
424
425 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
426 getfile(xtrmap, xtrmapskip);
427 }
428 Dprintf(stdout, "maxino = %lu\n", (unsigned long)maxino);
429 if (spcl.c_type != TS_BITS) {
430 if (spcl.c_type == TS_END) {
431 msg("Cannot find file dump list, assuming empty tape\n");
432 exit(0);
433 }
434 errx(1, "Cannot find file dump list");
435 }
436 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
437 if (map == (char *)NULL)
438 errx(1, "no memory for file dump list");
439 dumpmap = map;
440 curfile.action = USING;
441 getfile(xtrmap, xtrmapskip);
442 while (spcl.c_type == TS_ADDR) {
443 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
444 getfile(xtrmap, xtrmapskip);
445 }
446 /*
447 * If there may be whiteout entries on the tape, pretend that the
448 * whiteout inode exists, so that the whiteout entries can be
449 * extracted.
450 */
451 if (oldinofmt == 0)
452 SETINO(WINO, dumpmap);
453 readingmaps = 0;
454 findinode(&spcl);
455 }
456
457 /*
458 * Prompt user to load a new dump volume.
459 * "Nextvol" is the next suggested volume to use.
460 * This suggested volume is enforced when doing full
461 * or incremental restores, but can be overridden by
462 * the user when only extracting a subset of the files.
463 */
464 void
465 getvol(long nextvol)
466 {
467 long newvol = 0, wantnext = 0, i;
468 long saved_blksread = 0, saved_tpblksread = 0;
469 union u_spcl tmpspcl;
470 # define tmpbuf tmpspcl.s_spcl
471 char buf[TP_BSIZE];
472 int haderror = 0, bot_code = 1;
473
474 if (nextvol == 1) {
475 tapesread = 0;
476 gettingfile = 0;
477 tpblksread = 0;
478 blksread = 0;
479 }
480 if (pipein) {
481 if (nextvol != 1)
482 panic("Changing volumes on pipe input?\n");
483 if (volno == 1)
484 return;
485 goto gethdr;
486 }
487 saved_blksread = blksread;
488 saved_tpblksread = tpblksread;
489 #if defined(USE_QFA) && defined(sunos)
490 if (createtapeposflag || tapeposflag)
491 close(fdsmtc);
492 #endif
493 again:
494 if (pipein)
495 exit(1); /* pipes do not get a second chance */
496 if (aflag || curfile.action != SKIP) {
497 newvol = nextvol;
498 wantnext = 1;
499 } else {
500 newvol = 0;
501 wantnext = 0;
502 }
503 while (newvol <= 0) {
504 if (tapesread == 0) {
505 fprintf(stderr, "%s%s%s%s%s",
506 "You have not read any volumes yet.\n",
507 "Unless you know which volume your",
508 " file(s) are on you should start\n",
509 "with the last volume and work",
510 " towards the first.\n");
511 } else {
512 fprintf(stderr, "You have read volumes");
513 strcpy(buf, ": ");
514 for (i = 1; i < 32; i++)
515 if (tapesread & (1 << i)) {
516 fprintf(stderr, "%s%ld", buf, (long)i);
517 strcpy(buf, ", ");
518 }
519 fprintf(stderr, "\n");
520 }
521 do {
522 fprintf(stderr, "Specify next volume # (none if no more volumes): ");
523 (void) fflush(stderr);
524 (void) fgets(buf, TP_BSIZE, terminal);
525 } while (!feof(terminal) && buf[0] == '\n');
526 if (feof(terminal))
527 exit(1);
528 if (!strcmp(buf, "none\n")) {
529 terminateinput();
530 return;
531 }
532 newvol = atoi(buf);
533 if (newvol <= 0) {
534 fprintf(stderr,
535 "Volume numbers are positive numerics\n");
536 }
537 }
538 if (newvol == volno) {
539 tapesread |= 1 << volno;
540 #if defined(USE_QFA) && defined(sunos)
541 if (createtapeposflag || tapeposflag) {
542 if (OpenSMTCmt(magtape) < 0) {
543 volno = -1;
544 haderror = 1;
545 goto again;
546 }
547 }
548 #endif /* USE_QFA */
549 return;
550 }
551 closemt();
552
553 /*
554 * if using an archive file, reset its name so readtape()
555 * could properly use remote access.
556 */
557 Afile = NULL;
558
559 if (Mflag) {
560 snprintf(magtape, MAXPATHLEN, "%s%03ld", magtapeprefix, newvol);
561 magtape[MAXPATHLEN - 1] = '\0';
562 }
563 if (bot_script && !haderror) {
564 msg("Launching %s\n", bot_script);
565 bot_code = system_command(bot_script, magtape, newvol);
566 if (bot_code != 0 && bot_code != 1) {
567 msg("Restore aborted by the beginning of tape script\n");
568 exit(1);
569 }
570 }
571 if (haderror || (bot_code && !Mflag)) {
572 haderror = 0;
573 if (compare_errors)
574 fprintf(stderr, "%d compare errors so far\n", compare_errors);
575 #ifdef sunos
576 fprintf(stderr, "Mount volume %ld\n", (long)newvol);
577 #else
578 fprintf(stderr, "Mount tape volume %ld\n", (long)newvol);
579 #endif
580 fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
581 #ifdef sunos
582 fprintf(stderr, "then enter volume name (default: %s) ", magtape);
583 #else
584 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
585 #endif
586 (void) fflush(stderr);
587 (void) fgets(buf, TP_BSIZE, terminal);
588 if (feof(terminal))
589 exit(1);
590 if (!strcmp(buf, "none\n")) {
591 terminateinput();
592 return;
593 }
594 if (buf[0] != '\n') {
595 char *pos;
596 (void) strncpy(magtape, buf, sizeof(magtape));
597 magtape[sizeof(magtape) - 1] = '\0';
598 if ((pos = strchr(magtape, '\n')))
599 magtape[pos - magtape] = '\0';
600 }
601 }
602 #if defined(USE_QFA) && defined(sunos)
603 if (createtapeposflag || tapeposflag) {
604 if (OpenSMTCmt(magtape) < 0) {
605 volno = -1;
606 haderror = 1;
607 goto again;
608 }
609 }
610 #endif /* USE_QFA */
611 #ifdef RRESTORE
612 if (host)
613 mt = rmtopen(magtape, O_RDONLY);
614 else
615 #endif
616 mt = OPEN(magtape, O_RDONLY, 0);
617
618 if (mt == -1) {
619 fprintf(stderr, "Cannot open %s\n", magtape);
620 volno = -1;
621 haderror = 1;
622 goto again;
623 }
624 gethdr:
625 setmagtapein();
626 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
627 readtape_func = readtape_set;
628 #endif
629 volno = newvol;
630 setdumpnum();
631 FLUSHTAPEBUF();
632 findtapeblksize();
633 if (gethead(&tmpbuf) == FAIL) {
634 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
635 fprintf(stderr, "tape is not dump tape\n");
636 volno = 0;
637 haderror = 1;
638 blksread = saved_blksread;
639 tpblksread = saved_tpblksread;
640 goto again;
641 }
642 if (tmpbuf.c_volume != volno) {
643 fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume);
644 volno = 0;
645 haderror = 1;
646 blksread = saved_blksread;
647 tpblksread = saved_tpblksread;
648 goto again;
649 }
650 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
651 fprintf(stderr, "Wrong dump date\n\tgot: %s",
652 #ifdef sunos
653 ctime(&tmpbuf.c_date));
654 #else
655 ctime4(&tmpbuf.c_date));
656 #endif
657 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
658 volno = 0;
659 haderror = 1;
660 blksread = saved_blksread;
661 tpblksread = saved_tpblksread;
662 goto again;
663 }
664 tapesread |= 1 << volno;
665 /*
666 * If continuing from the previous volume, skip over any
667 * blocks read already at the end of the previous volume.
668 *
669 * If coming to this volume at random, skip to the beginning
670 * of the next record.
671 */
672 if (zflag) {
673 fprintf(stderr, "Dump tape is compressed.\n");
674 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB) && !defined(HAVE_LZO)
675 errx(1,"This restore version doesn't support decompression");
676 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
677 }
678 Dprintf(stdout, "read %ld recs, tape starts with %ld\n",
679 tpblksread - 1, (long)tmpbuf.c_firstrec);
680 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
681 if (!wantnext) {
682 tpblksread = tmpbuf.c_firstrec + 1;
683 for (i = tmpbuf.c_count; i > 0; i--)
684 readtape(buf);
685 } else if (tmpbuf.c_firstrec > 0 &&
686 tmpbuf.c_firstrec < tpblksread - 1) {
687 /*
688 * -1 since we've read the volume header
689 */
690 i = tpblksread - tmpbuf.c_firstrec - 1;
691 Dprintf(stderr, "Skipping %ld duplicate record%s.\n",
692 (long)i, i > 1 ? "s" : "");
693 while (--i >= 0)
694 readtape(buf);
695 }
696 }
697 if (curfile.action == USING) {
698 if (volno == 1)
699 panic("active file into volume 1\n");
700 return;
701 }
702 /*
703 * Skip up to the beginning of the next record
704 */
705 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
706 for (i = tmpbuf.c_count; i > 0; i--)
707 readtape(buf);
708 (void) gethead(&spcl);
709 findinode(&spcl);
710 if (gettingfile) {
711 gettingfile = 0;
712 siglongjmp(restart, 1);
713 }
714 }
715
716 /*
717 * Handle unexpected EOF.
718 */
719 static void
720 terminateinput(void)
721 {
722
723 if (gettingfile && curfile.action == USING) {
724 printf("Warning: %s %s\n",
725 "End-of-input encountered while extracting", curfile.name);
726 }
727 curfile.name = "<name unknown>";
728 curfile.action = UNKNOWN;
729 curfile.dip = NULL;
730 curfile.ino = maxino;
731 if (gettingfile) {
732 gettingfile = 0;
733 siglongjmp(restart, 1);
734 }
735 }
736
737 /*
738 * handle multiple dumps per tape by skipping forward to the
739 * appropriate one.
740 */
741 static void
742 setdumpnum(void)
743 {
744 struct mtop tcom;
745
746 if (dumpnum == 1 || volno != 1)
747 return;
748 if (pipein)
749 errx(1, "Cannot have multiple dumps on pipe input");
750 tcom.mt_op = MTFSF;
751 tcom.mt_count = dumpnum - 1;
752 #ifdef RRESTORE
753 if (host) {
754 if (rmtioctl(MTFSF, dumpnum - 1) < 0) {
755 fprintf(stderr, "rmtioctl MTFSF: %s\n", strerror(errno));
756 exit(1);
757 }
758 } else
759 #endif
760 if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0) {
761 fprintf(stderr, "rmtioctl MTFSF: %s\n", strerror(errno));
762 exit(1);
763 /* warn("ioctl MTFSF"); */
764 }
765 }
766
767 void
768 printdumpinfo(void)
769 {
770 #ifdef sunos
771 Vprintf(stdout, "Dump date: %s", ctime(&spcl.c_date));
772 Vprintf(stdout, "Dumped from: %s",
773 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&spcl.c_ddate));
774 if (spcl.c_host[0] == '\0')
775 return;
776 Vprintf(stdout, "Level %d dump of %s on %s:%s\n",
777 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
778 Vprintf(stdout, "Label: %s\n", spcl.c_label);
779 #else
780 fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date));
781 fprintf(stdout, "Dumped from: %s",
782 (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate));
783 if (spcl.c_host[0] == '\0')
784 return;
785 fprintf(stdout, "Level %d dump of %s on %s:%s\n",
786 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
787 fprintf(stdout, "Label: %s\n", spcl.c_label);
788 #endif
789 }
790
791 void
792 printvolinfo(void)
793 {
794 int i;
795
796 if (volinfo[1] == ROOTINO) {
797 printf("Starting inode numbers by volume:\n");
798 for (i = 1; i < (int)TP_NINOS && volinfo[i] != 0; ++i)
799 printf("\tVolume %d: %lu\n", i, (unsigned long)volinfo[i]);
800 }
801 }
802
803
804 int
805 extractfile(struct entry *ep, int doremove)
806 {
807 unsigned int flags;
808 mode_t mode;
809 struct timeval timep[2];
810 char *name = myname(ep);
811
812 /* If removal is requested (-r mode) do remove it unless
813 * we are extracting a metadata only inode */
814 if (spcl.c_flags & DR_METAONLY) {
815 Vprintf(stdout, "file %s is metadata only\n", name);
816 }
817 else {
818 if (doremove) {
819 removeleaf(ep);
820 ep->e_flags &= ~REMOVED;
821 }
822 }
823
824 curfile.name = name;
825 curfile.action = USING;
826 #if defined(__linux__) || defined(sunos)
827 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
828 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
829 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
830 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
831 #else /* __linux__ || sunos */
832 timep[0].tv_sec = curfile.dip->di_atime;
833 timep[0].tv_usec = curfile.dip->di_atimensec / 1000;
834 timep[1].tv_sec = curfile.dip->di_mtime;
835 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000;
836 #endif /* __linux__ */
837 mode = curfile.dip->di_mode;
838 flags = curfile.dip->di_flags;
839 switch (mode & IFMT) {
840
841 default:
842 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
843 skipfile();
844 return (FAIL);
845
846 case IFSOCK:
847 Vprintf(stdout, "skipped socket %s\n", name);
848 skipfile();
849 return (GOOD);
850
851 case IFDIR:
852 {
853 int ret;
854 if (mflag) {
855 if (ep == NULL || ep->e_flags & EXTRACT)
856 panic("unextracted directory %s\n", name);
857 skipfile();
858 return (GOOD);
859 }
860 Vprintf(stdout, "extract dir %s\n", name);
861 ret = genliteraldir(name, curfile.ino);
862 extractattr(name);
863 return ret;
864 }
865
866 case IFLNK:
867 {
868 #ifdef HAVE_LCHOWN
869 uid_t luid = curfile.dip->di_uid;
870 gid_t lgid = curfile.dip->di_gid;
871 #endif
872 if (! (spcl.c_flags & DR_METAONLY)) {
873 lnkbuf[0] = '\0';
874 pathlen = 0;
875 getfile(xtrlnkfile, xtrlnkskip);
876 if (pathlen == 0) {
877 Vprintf(stdout,
878 "%s: zero length symbolic link (ignored)\n", name);
879 return (GOOD);
880 }
881 if (linkit(lnkbuf, name, SYMLINK) == FAIL)
882 return (FAIL);
883 }
884 else
885 skipfile();
886
887 #ifdef HAVE_LCHOWN
888 (void) lchown(name, luid, lgid);
889 #endif
890 extractattr(name);
891 return (GOOD);
892 }
893
894 case IFIFO:
895 Vprintf(stdout, "extract fifo %s\n", name);
896 if (Nflag) {
897 skipfile();
898 return (GOOD);
899 }
900 if (! (spcl.c_flags & DR_METAONLY)) {
901 if (uflag && !Nflag)
902 (void)unlink(name);
903 if (mkfifo(name, mode) < 0) {
904 warn("%s: cannot create fifo", name);
905 skipfile();
906 return (FAIL);
907 }
908 }
909 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
910 (void) chmod(name, mode);
911 extractattr(name);
912 utimes(name, timep);
913 if (flags)
914 #ifdef __linux__
915 (void) lsetflags(name, flags);
916 #else
917 #ifdef sunos
918 {
919 warn("%s: cannot call chflags", name);
920 /* (void) chflags(name, flags); */
921 }
922 #else
923 (void) chflags(name, flags);
924 #endif
925 #endif
926 skipfile();
927 return (GOOD);
928
929 case IFCHR:
930 case IFBLK:
931 Vprintf(stdout, "extract special file %s\n", name);
932 if (Nflag) {
933 skipfile();
934 return (GOOD);
935 }
936 if (! (spcl.c_flags & DR_METAONLY)) {
937 if (uflag)
938 (void)unlink(name);
939 if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) {
940 warn("%s: cannot create special file", name);
941 skipfile();
942 return (FAIL);
943 }
944 }
945 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
946 (void) chmod(name, mode);
947 extractattr(name);
948 utimes(name, timep);
949 if (flags)
950 #ifdef __linux__
951 {
952 warn("%s: lsetflags called on a special file", name);
953 (void) lsetflags(name, flags);
954 }
955 #else
956 #ifdef sunos
957 {
958 warn("%s: cannot call chflags on a special file", name);
959 /* (void) chflags(name, flags); */
960 }
961 #else
962 {
963 warn("%s: chflags called on a special file", name);
964 (void) chflags(name, flags);
965 }
966 #endif
967 #endif
968 skipfile();
969 return (GOOD);
970
971 case IFREG:
972 {
973 uid_t luid = curfile.dip->di_uid;
974 gid_t lgid = curfile.dip->di_gid;
975
976 Vprintf(stdout, "extract file %s\n", name);
977 if (Nflag) {
978 skipfile();
979 return (GOOD);
980 }
981 if (! (spcl.c_flags & DR_METAONLY)) {
982 if (uflag)
983 (void)unlink(name);
984 if ((ofile = OPEN(name, O_WRONLY | O_CREAT | O_TRUNC,
985 0666)) < 0) {
986 warn("%s: cannot create file", name);
987 skipfile();
988 return (FAIL);
989 }
990 getfile(xtrfile, xtrskip);
991 (void) close(ofile);
992 }
993 else
994 skipfile();
995 (void) chown(name, luid, lgid);
996 (void) chmod(name, mode);
997 extractattr(name);
998 utimes(name, timep);
999 if (flags)
1000 #ifdef __linux__
1001 (void) lsetflags(name, flags);
1002 #else
1003 #ifdef sunos
1004 {
1005 warn("%s: cannot call chflags", name);
1006 /* (void) chflags(name, flags); */
1007 }
1008 #else
1009 (void) chflags(name, flags);
1010 #endif
1011 #endif
1012 return (GOOD);
1013 }
1014 }
1015 /* NOTREACHED */
1016 }
1017
1018 static int
1019 extractattr(char *path)
1020 {
1021 while (spcl.c_flags & DR_EXTATTRIBUTES) {
1022 switch (spcl.c_extattributes) {
1023 case EXT_MACOSFNDRINFO:
1024 #ifdef DUMP_MACOSX
1025 (void)extractfinderinfoufs(path);
1026 #else
1027 msg("MacOSX not supported in this version, skipping\n");
1028 skipfile();
1029 #endif
1030 break;
1031 case EXT_MACOSRESFORK:
1032 #ifdef DUMP_MACOSX
1033 (void)extractresourceufs(path);
1034 #else
1035 msg("MacOSX not supported in this version, skipping\n");
1036 skipfile();
1037 #endif
1038 break;
1039 case EXT_XATTR: {
1040 char xattr[XATTR_MAXSIZE];
1041
1042 if (readxattr(xattr) == GOOD) {
1043 xattr_extract(path, xattr);
1044 break;
1045 }
1046 }
1047 default:
1048 msg("unexpected inode extension %ld, skipping\n", spcl.c_extattributes);
1049 skipfile();
1050 break;
1051 }
1052 }
1053 return GOOD;
1054 }
1055
1056 #ifdef DUMP_MACOSX
1057 int
1058 extractfinderinfoufs(char *name)
1059 {
1060 int err;
1061 char oFileRsrc[MAXPATHLEN];
1062 int flags;
1063 mode_t mode;
1064 struct timeval timep[2];
1065 u_int32_t uid;
1066 u_int32_t gid;
1067 char path[MAXPATHLEN], fname[MAXPATHLEN];
1068
1069 curfile.name = name;
1070 curfile.action = USING;
1071 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
1072 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
1073 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
1074 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
1075 mode = curfile.dip->di_mode;
1076 flags = curfile.dip->di_flags;
1077 uid = curfile.dip->di_uid;
1078 gid = curfile.dip->di_gid;
1079
1080 switch (mode & IFMT) {
1081
1082 default:
1083 fprintf(stderr, "%s: (extr. finfoufs) unknown file mode 0%o\n", name, mode);
1084 skipfile();
1085 return (FAIL);
1086
1087 case IFDIR:
1088 fprintf(stderr, "%s: (extr. finfoufs[IFDIR]) unknown file mode 0%o\n", name, mode);
1089 skipfile();
1090 return (FAIL);
1091
1092 case IFLNK:
1093 skipfile();
1094 return (GOOD);
1095
1096 case IFREG:
1097 Vprintf(stdout, "extract finderinfo file %s\n", name);
1098 if (Nflag) {
1099 skipfile();
1100 return (GOOD);
1101 }
1102 getfile(xtrfilefinderinfo, xtrskip);
1103
1104 GetPathFile(name, path, fname);
1105 strcpy(oFileRsrc, path);
1106 strcat(oFileRsrc, "._");
1107 strcat(oFileRsrc, fname);
1108
1109 if ((err = CreateAppleDoubleFileRes(oFileRsrc, &gFndrInfo.fndrinfo,
1110 mode, flags, timep, uid, gid)) != 0) {
1111 fprintf(stderr, "%s: cannot create finderinfo: %s\n",
1112 name, strerror(errno));
1113 skipfile();
1114 return (FAIL);
1115 }
1116 return (GOOD);
1117 }
1118 /* NOTREACHED */
1119 }
1120
1121
1122 int
1123 extractresourceufs(char *name)
1124 {
1125 char oFileRsrc[MAXPATHLEN];
1126 int flags;
1127 mode_t mode;
1128 struct timeval timep[2];
1129 char path[MAXPATHLEN], fname[MAXPATHLEN];
1130 ASDHeaderPtr hp;
1131 ASDEntryPtr ep;
1132 u_long loff;
1133 u_int32_t uid;
1134 u_int32_t gid;
1135 u_int64_t di_size;
1136 char *p;
1137 char buf[1024];
1138
1139 curfile.name = name;
1140 curfile.action = USING;
1141 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
1142 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
1143 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
1144 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
1145 mode = curfile.dip->di_mode;
1146 flags = curfile.dip->di_flags;
1147 uid = curfile.dip->di_uid;
1148 gid = curfile.dip->di_gid;
1149 di_size = curfile.dip->di_size;
1150
1151 switch (mode & IFMT) {
1152
1153 default:
1154 fprintf(stderr, "%s: (extr. resufs) unknown file mode 0%o\n", name, mode);
1155 skipfile();
1156 return (FAIL);
1157
1158 case IFDIR:
1159 fprintf(stderr, "%s: (extr. resufs [IFDIR]) unknown file mode 0%o\n", name, mode);
1160 skipfile();
1161 return (FAIL);
1162
1163 case IFLNK:
1164 skipfile();
1165 return (GOOD);
1166
1167 case IFREG:
1168 Vprintf(stdout, "extract resource file %s\n", name);
1169 if (Nflag) {
1170 skipfile();
1171 return (GOOD);
1172 }
1173
1174 GetPathFile(name, path, fname);
1175 strcpy(oFileRsrc, path);
1176 strcat(oFileRsrc, "._");
1177 strcat(oFileRsrc, fname);
1178
1179 if ((ofile = open(oFileRsrc, O_RDONLY, 0)) < 0) {
1180 fprintf(stderr, "%s: cannot read finderinfo: %s\n",
1181 name, strerror(errno));
1182 skipfile();
1183 return (FAIL);
1184 }
1185 read(ofile, buf, 70);
1186 (void) close(ofile);
1187 p = buf;
1188 hp = (ASDHeaderPtr)p;
1189 /* the header */
1190 hp->entries++;
1191 p += sizeof(ASDHeader) - CORRECT;
1192 ep = (ASDEntryPtr)p;
1193 /* the finderinfo entry */
1194 ep->offset += sizeof(ASDEntry);
1195 loff = ep->offset;
1196
1197 p += sizeof(ASDEntry);
1198 /* the finderinfo data */
1199 bcopy(p, p + sizeof(ASDEntry), INFOLEN);
1200 ep = (ASDEntryPtr)p;
1201 /* the new resourcefork entry */
1202 ep->entryID = EntryRSRCFork;
1203 ep->offset = loff + INFOLEN;
1204 ep->len = di_size;
1205 /* write the new appledouble entries to the file */
1206 if ((ofile = open(oFileRsrc, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
1207 fprintf(stderr, "%s: cannot create resource file: %s\n",
1208 name, strerror(errno));
1209 skipfile();
1210 return (FAIL);
1211 }
1212 write(ofile, buf, 70 + sizeof(ASDEntry));
1213 /* and add the resource data from tape */
1214 getfile(xtrfile, xtrskip);
1215
1216 (void) fchown(ofile, uid, gid);
1217 (void) fchmod(ofile, mode);
1218 (void) close(ofile);
1219 utimes(oFileRsrc, timep);
1220 (void) lsetflags(oFileRsrc, flags);
1221 return (GOOD);
1222 }
1223 /* NOTREACHED */
1224 }
1225 #endif /* DUMP_MACOSX */
1226
1227 int
1228 readxattr(char *buffer)
1229 {
1230 if (dflag)
1231 msg("reading EA data for inode %lu\n", curfile.ino);
1232
1233 curfile.name = "EA block";
1234 if (curfile.dip->di_size > XATTR_MAXSIZE) {
1235 fprintf(stderr, "EA size too big (%ld)", (long)curfile.dip->di_size);
1236 skipfile();
1237 return (FAIL);
1238 }
1239
1240 memset(xattrbuf, 0, XATTR_MAXSIZE);
1241 xattrlen = 0;
1242
1243 getfile(xtrxattr, xtrnull);
1244
1245 memcpy(buffer, xattrbuf, XATTR_MAXSIZE);
1246
1247 return (GOOD);
1248 }
1249
1250 /*
1251 * skip over bit maps on the tape
1252 */
1253 void
1254 skipmaps(void)
1255 {
1256
1257 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
1258 skipfile();
1259 }
1260
1261 /*
1262 * skip over a file on the tape
1263 */
1264 void
1265 skipfile(void)
1266 {
1267
1268 curfile.action = SKIP;
1269 getfile(xtrnull, xtrnull);
1270 }
1271
1272 /*
1273 * skip over any extended attributes.
1274 */
1275 void
1276 skipxattr(void)
1277 {
1278
1279 while (spcl.c_flags & DR_EXTATTRIBUTES)
1280 skipfile();
1281 }
1282
1283 /*
1284 * Extract a file from the tape.
1285 * When an allocated block is found it is passed to the fill function;
1286 * when an unallocated block (hole) is found, a zeroed buffer is passed
1287 * to the skip function.
1288 */
1289 void
1290 getfile(void (*fill) __P((char *, size_t)), void (*skip) __P((char *, size_t)))
1291 {
1292 int i;
1293 volatile int curblk = 0;
1294 volatile quad_t size = spcl.c_dinode.di_size;
1295 volatile int last_write_was_hole = 0;
1296 quad_t origsize = size;
1297 static char clearedbuf[MAXBSIZE];
1298 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
1299 char junk[TP_BSIZE];
1300
1301 if (spcl.c_type == TS_END)
1302 panic("ran off end of tape\n");
1303 if (spcl.c_magic != NFS_MAGIC)
1304 panic("not at beginning of a file\n");
1305 if (!gettingfile && setjmp(restart) != 0)
1306 return;
1307 gettingfile++;
1308 loop:
1309 for (i = 0; i < spcl.c_count; i++) {
1310 if (readmapflag || spcl.c_addr[i]) {
1311 readtape(&buf[curblk++][0]);
1312 if (curblk == fssize / TP_BSIZE) {
1313 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
1314 fssize : (curblk - 1) * TP_BSIZE + size));
1315 curblk = 0;
1316 last_write_was_hole = 0;
1317 }
1318 } else {
1319 if (curblk > 0) {
1320 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
1321 curblk * TP_BSIZE :
1322 (curblk - 1) * TP_BSIZE + size));
1323 curblk = 0;
1324 }
1325 (*skip)(clearedbuf, (long)(size > TP_BSIZE ?
1326 TP_BSIZE : size));
1327 last_write_was_hole = 1;
1328 }
1329 if ((size -= TP_BSIZE) <= 0) {
1330 for (i++; i < spcl.c_count; i++)
1331 if (readmapflag || spcl.c_addr[i])
1332 readtape(junk);
1333 break;
1334 }
1335 }
1336 if (gethead(&spcl) == GOOD && size > 0) {
1337 if (spcl.c_type == TS_ADDR)
1338 goto loop;
1339 Dprintf(stdout,
1340 "Missing address (header) block for %s at %ld blocks\n",
1341 curfile.name, (long)blksread);
1342 }
1343 if (curblk > 0) {
1344 (*fill)((char *)buf, (size_t)((curblk * TP_BSIZE) + size));
1345 last_write_was_hole = 0;
1346 }
1347 if (size > 0) {
1348 fprintf(stderr, "Missing blocks at the end of %s, assuming hole\n", curfile.name);
1349 while (size > 0) {
1350 size_t skp = size > TP_BSIZE ? TP_BSIZE : size;
1351 (*skip)(clearedbuf, skp);
1352 size -= skp;
1353 }
1354 last_write_was_hole = 1;
1355 }
1356 if (last_write_was_hole) {
1357 FTRUNCATE(ofile, origsize);
1358 }
1359 if (!readingmaps)
1360 findinode(&spcl);
1361 gettingfile = 0;
1362 }
1363
1364 /*
1365 * Write out the next block of a file.
1366 */
1367 static void
1368 xtrfile(char *buf, size_t size)
1369 {
1370
1371 if (Nflag)
1372 return;
1373 if (write(ofile, buf, (int) size) == -1)
1374 err(1, "write error extracting inode %lu, name %s\nwrite",
1375 (unsigned long)curfile.ino, curfile.name);
1376 }
1377
1378 #ifdef DUMP_MACOSX
1379 static void
1380 xtrfilefinderinfo(char *buf, size_t size)
1381 {
1382 bcopy(buf, &gFndrInfo, size);
1383 }
1384 #endif /* DUMP_MACOSX */
1385
1386 /*
1387 * Skip over a hole in a file.
1388 */
1389 /* ARGSUSED */
1390 static void
1391 xtrskip(UNUSED(char *buf), size_t size)
1392 {
1393
1394 if (LSEEK(ofile, (OFF_T)size, SEEK_CUR) == -1)
1395 err(1, "seek error extracting inode %lu, name %s\nlseek",
1396 (unsigned long)curfile.ino, curfile.name);
1397 }
1398
1399 /*
1400 * Collect the next block of a symbolic link.
1401 */
1402 static void
1403 xtrlnkfile(char *buf, size_t size)
1404 {
1405
1406 pathlen += size;
1407 if (pathlen > MAXPATHLEN) {
1408 buf[size - 1] = '\0';
1409 errx(1, "symbolic link name: %s->%s%s; too long %d",
1410 curfile.name, lnkbuf, buf, pathlen);
1411 }
1412 (void) strcat(lnkbuf, buf);
1413 lnkbuf[pathlen] = '\0';
1414 }
1415
1416 /*
1417 * Skip over a hole in a symbolic link (should never happen).
1418 */
1419 /* ARGSUSED */
1420 static void
1421 xtrlnkskip(UNUSED(char *buf), UNUSED(size_t size))
1422 {
1423
1424 errx(1, "unallocated block in symbolic link %s", curfile.name);
1425 }
1426
1427 /*
1428 * Collect the next block of a bit map.
1429 */
1430 static void
1431 xtrmap(char *buf, size_t size)
1432 {
1433
1434 memmove(map, buf, size);
1435 map += size;
1436 }
1437
1438 /*
1439 * Skip over a hole in a bit map (should never happen).
1440 */
1441 /* ARGSUSED */
1442 static void
1443 xtrmapskip(UNUSED(char *buf), size_t size)
1444 {
1445
1446 panic("hole in map\n");
1447 map += size;
1448 }
1449
1450 /*
1451 * Noop, when an extraction function is not needed.
1452 */
1453 /* ARGSUSED */
1454 void
1455 xtrnull(UNUSED(char *buf), UNUSED(size_t size))
1456 {
1457
1458 return;
1459 }
1460
1461 #if COMPARE_ONTHEFLY
1462 /*
1463 * Compare the next block of a file.
1464 */
1465 static void
1466 xtrcmpfile(char *buf, size_t size)
1467 {
1468 static char cmpbuf[MAXBSIZE];
1469
1470 if (cmperror)
1471 return;
1472
1473 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1474 fprintf(stderr, "%s: size has changed.\n",
1475 curfile.name);
1476 cmperror = 1;
1477 return;
1478 }
1479
1480 if (memcmp(buf, cmpbuf, size) != 0) {
1481 fprintf(stderr, "%s: tape and disk copies are different\n",
1482 curfile.name);
1483 cmperror = 1;
1484 return;
1485 }
1486 }
1487
1488 /*
1489 * Skip over a hole in a file.
1490 */
1491 static void
1492 xtrcmpskip(UNUSED(char *buf), size_t size)
1493 {
1494 static char cmpbuf[MAXBSIZE];
1495 int i;
1496
1497 if (cmperror)
1498 return;
1499
1500 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1501 fprintf(stderr, "%s: size has changed.\n",
1502 curfile.name);
1503 cmperror = 1;
1504 return;
1505 }
1506
1507 for (i = 0; i < (int)size; ++i)
1508 if (cmpbuf[i] != '\0') {
1509 fprintf(stderr, "%s: tape and disk copies are different\n",
1510 curfile.name);
1511 cmperror = 1;
1512 return;
1513 }
1514 }
1515 #endif /* COMPARE_ONTHEFLY */
1516
1517 static void
1518 xtrxattr(char *buf, size_t size)
1519 {
1520 if (xattrlen + size > XATTR_MAXSIZE) {
1521 fprintf(stderr, "EA size too big (%ld)", (long)xattrlen + size);
1522 return;
1523 }
1524 memcpy(xattrbuf + xattrlen, buf, size);
1525 xattrlen += size;
1526 }
1527
1528 #if !COMPARE_ONTHEFLY
1529 static int
1530 do_cmpfiles(int fd_tape, int fd_disk, OFF_T size)
1531 {
1532 static char buf_tape[BUFSIZ];
1533 static char buf_disk[BUFSIZ];
1534 ssize_t n_tape;
1535 ssize_t n_disk;
1536
1537 while (size > 0) {
1538 if ((n_tape = read(fd_tape, buf_tape, sizeof(buf_tape))) < 1) {
1539 close(fd_tape), close(fd_disk);
1540 panic("do_cmpfiles: unexpected EOF[1]");
1541 }
1542 if ((n_disk = read(fd_disk, buf_disk, sizeof(buf_tape))) < 1) {
1543 close(fd_tape), close(fd_disk);
1544 panic("do_cmpfiles: unexpected EOF[2]");
1545 }
1546 if (n_tape != n_disk) {
1547 close(fd_tape), close(fd_disk);
1548 panic("do_cmpfiles: sizes different!");
1549 }
1550 if (memcmp(buf_tape, buf_disk, (size_t)n_tape) != 0) return (1);
1551 size -= n_tape;
1552 }
1553 return (0);
1554 }
1555
1556 /* for debugging compare problems */
1557 #undef COMPARE_FAIL_KEEP_FILE
1558
1559 static
1560 #ifdef COMPARE_FAIL_KEEP_FILE
1561 /* return true if tapefile should be unlinked after compare */
1562 int
1563 #else
1564 void
1565 #endif
1566 cmpfiles(char *tapefile, char *diskfile, struct STAT *sbuf_disk)
1567 {
1568 struct STAT sbuf_tape;
1569 int fd_tape, fd_disk;
1570
1571 if (STAT(tapefile, &sbuf_tape) != 0) {
1572 panic("can't lstat tmp file %s: %s\n", tapefile,
1573 strerror(errno));
1574 do_compare_error;
1575 }
1576
1577 if (sbuf_disk->st_size != sbuf_tape.st_size) {
1578 fprintf(stderr,
1579 "%s: size changed from %lld to %lld.\n",
1580 diskfile, (long long)sbuf_tape.st_size, (long long)sbuf_disk->st_size);
1581 do_compare_error;
1582 #ifdef COMPARE_FAIL_KEEP_FILE
1583 return (0);
1584 #else
1585 return;
1586 #endif
1587 }
1588
1589 if ((fd_tape = OPEN(tapefile, O_RDONLY)) < 0) {
1590 panic("can't open %s: %s\n", tapefile, strerror(errno));
1591 do_compare_error;
1592 }
1593 if ((fd_disk = OPEN(diskfile, O_RDONLY)) < 0) {
1594 close(fd_tape);
1595 panic("can't open %s: %s\n", diskfile, strerror(errno));
1596 do_compare_error;
1597 }
1598
1599 if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) {
1600 fprintf(stderr, "%s: tape and disk copies are different\n",
1601 diskfile);
1602 close(fd_tape);
1603 close(fd_disk);
1604 do_compare_error;
1605 #ifdef COMPARE_FAIL_KEEP_FILE
1606 /* rename the file to live in /tmp */
1607 /* rename `tapefile' to /tmp/<basename of diskfile> */
1608 {
1609 char *p = strrchr(diskfile, '/');
1610 char newname[MAXPATHLEN];
1611 if (!p) {
1612 panic("can't find / in %s\n", diskfile);
1613 }
1614 snprintf(newname, sizeof(newname), "%s/debug/%s", tmpdir, p + 1);
1615 if (rename(tapefile, newname)) {
1616 panic("rename from %s to %s failed: %s\n",
1617 tapefile, newname,
1618 strerror(errno));
1619 } else {
1620 fprintf(stderr, "*** %s saved to %s\n",
1621 tapefile, newname);
1622 }
1623 }
1624
1625 /* don't unlink the file (it's not there anymore */
1626 /* anyway) */
1627 return (0);
1628 #else
1629 return;
1630 #endif
1631 }
1632 close(fd_tape);
1633 close(fd_disk);
1634 #ifdef COMPARE_FAIL_KEEP_FILE
1635 return (1);
1636 #endif
1637 }
1638 #endif /* !COMPARE_ONTHEFLY */
1639
1640 static void
1641 compareattr(char *name)
1642 {
1643 int xattr_done = 0;
1644
1645 while (spcl.c_flags & DR_EXTATTRIBUTES) {
1646 switch (spcl.c_extattributes) {
1647 case EXT_MACOSFNDRINFO:
1648 msg("MacOSX not supported for comparision in this version, skipping\n");
1649 skipfile();
1650 break;
1651 case EXT_MACOSRESFORK:
1652 msg("MacOSX not supported for comparision in this version, skipping\n");
1653 skipfile();
1654 break;
1655 case EXT_XATTR: {
1656 char xattr[XATTR_MAXSIZE];
1657
1658 if (readxattr(xattr) == GOOD) {
1659 if (xattr_compare(name, xattr) == FAIL)
1660 do_compare_error;
1661 xattr_done = 1;
1662 }
1663 else
1664 do_compare_error;
1665 break;
1666 }
1667 default:
1668 msg("unexpected inode extension %ld, skipping\n", spcl.c_extattributes);
1669 skipfile();
1670 break;
1671 }
1672 }
1673 if (!xattr_done && xattr_compare(name, NULL) == FAIL)
1674 do_compare_error;
1675 }
1676
1677 #if !COMPARE_ONTHEFLY
1678 static char tmpfilename[MAXPATHLEN];
1679 #endif
1680
1681 void
1682 comparefile(char *name)
1683 {
1684 mode_t mode;
1685 uid_t uid;
1686 uid_t gid;
1687 unsigned int flags;
1688 unsigned long newflags;
1689 struct STAT sb;
1690 int r;
1691 #if !COMPARE_ONTHEFLY
1692 static char *tmpfile = NULL;
1693 struct STAT stemp;
1694 #endif
1695 curfile.name = name;
1696 curfile.action = USING;
1697 mode = curfile.dip->di_mode;
1698 flags = curfile.dip->di_flags;
1699 uid = curfile.dip->di_uid;
1700 gid = curfile.dip->di_gid;
1701
1702 if ((mode & IFMT) == IFSOCK) {
1703 Vprintf(stdout, "skipped socket %s\n", name);
1704 skipfile();
1705 return;
1706 }
1707
1708 if ((r = LSTAT(name, &sb)) != 0) {
1709 warn("unable to stat %s", name);
1710 do_compare_error;
1711 skipfile();
1712 return;
1713 }
1714
1715 Vprintf(stdout, "comparing %s (size: %lld, mode: 0%o)\n", name,
1716 (long long)sb.st_size, mode);
1717
1718 if (sb.st_mode != mode) {
1719 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
1720 name, mode & 07777, sb.st_mode & 07777);
1721 do_compare_error;
1722 }
1723 if (sb.st_uid != uid) {
1724 fprintf(stderr, "%s: uid changed from %d to %d.\n",
1725 name, uid, sb.st_uid);
1726 do_compare_error;
1727 }
1728 if (sb.st_gid != gid) {
1729 fprintf(stderr, "%s: gid changed from %d to %d.\n",
1730 name, gid, sb.st_gid);
1731 do_compare_error;
1732 }
1733 #ifdef __linux__
1734 if (lgetflags(name, &newflags) < 0) {
1735 if (flags != 0) {
1736 warn("%s: lgetflags failed", name);
1737 do_compare_error;
1738 }
1739 }
1740 else {
1741 if (newflags != flags) {
1742 fprintf(stderr, "%s: flags changed from 0x%08x to 0x%08lx.\n",
1743 name, flags, newflags);
1744 do_compare_error;
1745 }
1746 }
1747 #endif
1748 if (spcl.c_flags & DR_METAONLY) {
1749 skipfile();
1750 return;
1751 }
1752 switch (mode & IFMT) {
1753 default:
1754 skipfile();
1755 return;
1756
1757 case IFSOCK:
1758 skipfile();
1759 return;
1760
1761 case IFDIR:
1762 skipfile();
1763 compareattr(name);
1764 return;
1765
1766 case IFLNK: {
1767 char lbuf[MAXPATHLEN + 1];
1768 int lsize;
1769
1770 if (!(sb.st_mode & S_IFLNK)) {
1771 fprintf(stderr, "%s: is no longer a symbolic link\n",
1772 name);
1773 do_compare_error;
1774 return;
1775 }
1776 lnkbuf[0] = '\0';
1777 pathlen = 0;
1778 getfile(xtrlnkfile, xtrlnkskip);
1779 if (pathlen == 0) {
1780 fprintf(stderr,
1781 "%s: zero length symbolic link (ignored)\n",
1782 name);
1783 do_compare_error;
1784 return;
1785 }
1786 if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) {
1787 panic("readlink of %s failed: %s\n", name,
1788 strerror(errno));
1789 do_compare_error;
1790 }
1791 lbuf[lsize] = 0;
1792 if (strcmp(lbuf, lnkbuf) != 0) {
1793 fprintf(stderr,
1794 "%s: symbolic link changed from %s to %s.\n",
1795 name, lnkbuf, lbuf);
1796 do_compare_error;
1797 return;
1798 }
1799 compareattr(name);
1800 return;
1801 }
1802
1803 case IFCHR:
1804 case IFBLK:
1805 if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) {
1806 fprintf(stderr, "%s: no longer a special file\n",
1807 name);
1808 do_compare_error;
1809 skipfile();
1810 return;
1811 }
1812
1813 if (sb.st_rdev != (dev_t)curfile.dip->di_rdev) {
1814 fprintf(stderr,
1815 "%s: device changed from %d,%d to %d,%d.\n",
1816 name,
1817 major(curfile.dip->di_rdev),
1818 minor(curfile.dip->di_rdev),
1819 major(sb.st_rdev),
1820 minor(sb.st_rdev));
1821 do_compare_error;
1822 }
1823 skipfile();
1824 compareattr(name);
1825 return;
1826
1827 case IFREG:
1828 #if COMPARE_ONTHEFLY
1829 if ((ifile = OPEN(name, O_RDONLY)) < 0) {
1830 warn("can't open %s", name);
1831 skipfile();
1832 do_compare_error;
1833 }
1834 else {
1835 cmperror = 0;
1836 getfile(xtrcmpfile, xtrcmpskip);
1837 if (!cmperror) {
1838 char c;
1839 if (read(ifile, &c, 1) != 0) {
1840 fprintf(stderr, "%s: size has changed.\n",
1841 name);
1842 cmperror = 1;
1843 }
1844 }
1845 if (cmperror)
1846 do_compare_error;
1847 close(ifile);
1848 }
1849 #else
1850 if (tmpfile == NULL) {
1851 /* argument to mktemp() must not be in RO space: */
1852 snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir);
1853 tmpfile = mktemp(&tmpfilename[0]);
1854 }
1855 if ((STAT(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) {
1856 panic("cannot delete tmp file %s: %s\n",
1857 tmpfile, strerror(errno));
1858 }
1859 if ((ofile = OPEN(tmpfile, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) {
1860 panic("cannot create file temp file %s: %s\n",
1861 name, strerror(errno));
1862 }
1863 getfile(xtrfile, xtrskip);
1864 (void) close(ofile);
1865 #ifdef COMPARE_FAIL_KEEP_FILE
1866 if (cmpfiles(tmpfile, name, &sb))
1867 unlink(tmpfile);
1868 #else
1869 cmpfiles(tmpfile, name, &sb);
1870 unlink(tmpfile);
1871 #endif
1872 #endif /* COMPARE_ONTHEFLY */
1873 compareattr(name);
1874 return;
1875 }
1876 /* NOTREACHED */
1877 }
1878
1879 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1880 static void (*readtape_func)(char *) = readtape_set;
1881
1882 /*
1883 * Read TP_BSIZE blocks from the input.
1884 * Handle read errors, and end of media.
1885 * Decompress compressed blocks.
1886 */
1887 static void
1888 readtape(char *buf)
1889 {
1890 (*readtape_func)(buf); /* call the actual processing routine */
1891 }
1892
1893 /*
1894 * Set function pointer for readtape() routine. zflag and magtapein must
1895 * be correctly set before the first call to readtape().
1896 */
1897 static void
1898 readtape_set(char *buf)
1899 {
1900 if (!zflag)
1901 readtape_func = readtape_uncompr;
1902 else {
1903 newcomprbuf(ntrec);
1904 if (magtapein)
1905 readtape_func = readtape_comprtape;
1906 else
1907 readtape_func = readtape_comprfile;
1908 }
1909 readtape(buf);
1910 }
1911
1912 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
1913
1914 /*
1915 * This is the original readtape(), it's used for reading uncompressed input.
1916 * Read TP_BSIZE blocks from the input.
1917 * Handle read errors, and end of media.
1918 */
1919 static void
1920 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1921 readtape_uncompr(char *buf)
1922 #else
1923 readtape(char *buf)
1924 #endif
1925 {
1926 ssize_t rd, newvol, i;
1927 int cnt, seek_failed;
1928
1929 if (blkcnt < numtrec) {
1930 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1931 blksread++;
1932 tpblksread++;
1933 return;
1934 }
1935 tbufptr = tapebuf;
1936 for (i = 0; i < ntrec; i++)
1937 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1938 if (numtrec == 0)
1939 numtrec = ntrec;
1940 cnt = ntrec * TP_BSIZE;
1941 rd = 0;
1942 #ifdef USE_QFA
1943 if (createtapeposflag)
1944 (void)GetTapePos(&curtapepos);
1945 #endif
1946 getmore:
1947 #ifdef RRESTORE
1948 if (!Afile && host)
1949 i = rmtread(&tapebuf[rd], cnt);
1950 else
1951 #endif
1952 i = read(mt, &tapebuf[rd], cnt);
1953
1954 /*
1955 * Check for mid-tape short read error.
1956 * If found, skip rest of buffer and start with the next.
1957 */
1958 if (!pipein && numtrec < ntrec && i > 0) {
1959 Dprintf(stdout, "mid-media short read error.\n");
1960 numtrec = ntrec;
1961 }
1962 /*
1963 * Handle partial block read.
1964 */
1965 if (pipein && i == 0 && rd > 0)
1966 i = rd;
1967 else if (i > 0 && i != ntrec * TP_BSIZE) {
1968 if (pipein) {
1969 rd += i;
1970 cnt -= i;
1971 if (cnt > 0)
1972 goto getmore;
1973 i = rd;
1974 } else {
1975 /*
1976 * Short read. Process the blocks read.
1977 */
1978 if (i % TP_BSIZE != 0)
1979 Vprintf(stdout,
1980 "partial block read: %ld should be %ld\n",
1981 (long)i, ntrec * TP_BSIZE);
1982 numtrec = i / TP_BSIZE;
1983 }
1984 }
1985 /*
1986 * Handle read error.
1987 */
1988 if (i < 0) {
1989 fprintf(stderr, "Tape read error while ");
1990 switch (curfile.action) {
1991 default:
1992 fprintf(stderr, "trying to set up tape\n");
1993 break;
1994 case UNKNOWN:
1995 fprintf(stderr, "trying to resynchronize\n");
1996 break;
1997 case USING:
1998 fprintf(stderr, "restoring %s\n", curfile.name);
1999 break;
2000 case SKIP:
2001 fprintf(stderr, "skipping over inode %lu\n",
2002 (unsigned long)curfile.ino);
2003 break;
2004 }
2005 if (!yflag && !reply("continue"))
2006 exit(1);
2007 i = ntrec * TP_BSIZE;
2008 memset(tapebuf, 0, (size_t)i);
2009 #ifdef RRESTORE
2010 if (!Afile && host)
2011 seek_failed = (rmtseek(i, 1) < 0);
2012 else
2013 #endif
2014 seek_failed = (LSEEK(mt, i, SEEK_CUR) == (OFF_T)-1);
2015
2016 if (seek_failed) {
2017 warn("continuation failed");
2018 if (!yflag && !reply("assume end-of-tape and continue"))
2019 exit(1);
2020 i = 0;
2021 }
2022 }
2023 /*
2024 * Handle end of tape.
2025 */
2026 if (i == 0) {
2027 Vprintf(stdout, "End-of-tape encountered\n");
2028 if (!pipein) {
2029 newvol = volno + 1;
2030 volno = 0;
2031 numtrec = 0;
2032 getvol(newvol);
2033 readtape(buf);
2034 return;
2035 }
2036 if (rd % TP_BSIZE != 0)
2037 panic("partial block read: %d should be %d\n",
2038 rd, ntrec * TP_BSIZE);
2039 terminateinput();
2040 memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE);
2041 }
2042 blkcnt = 0;
2043 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2044 blksread++;
2045 tpblksread++;
2046 }
2047
2048 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
2049
2050 /*
2051 * Read a compressed format block from a file or pipe and uncompress it.
2052 * Attempt to handle read errors, and end of file.
2053 */
2054 static void
2055 readtape_comprfile(char *buf)
2056 {
2057 long rl, size, i, ret;
2058 int newvol;
2059 struct tapebuf *tpb;
2060
2061 if (blkcnt < numtrec) {
2062 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2063 blksread++;
2064 tpblksread++;
2065 return;
2066 }
2067 /* need to read the next block */
2068 tbufptr = tapebuf;
2069 for (i = 0; i < ntrec; i++)
2070 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2071 numtrec = ntrec;
2072 tpb = (struct tapebuf *) tapebuf;
2073
2074 /* read the block prefix */
2075 ret = read_a_block(mt, tapebuf, PREFIXSIZE, &rl);
2076 converttapebuf(tpb);
2077
2078 if (Vflag && (ret == 0 || rl < (int)PREFIXSIZE || tpb->length == 0))
2079 ret = 0;
2080 if (ret <= 0)
2081 goto readerr;
2082
2083 /* read the data */
2084 size = tpb->length;
2085 if (size > bufsize) {
2086 /* something's wrong */
2087 Vprintf(stdout, "Prefix size error, max size %d, got %ld\n",
2088 bufsize, size);
2089 size = bufsize;
2090 tpb->length = bufsize;
2091 }
2092 ret = read_a_block(mt, tpb->buf, size, &rl);
2093 if (ret <= 0)
2094 goto readerr;
2095
2096 tbufptr = decompress_tapebuf(tpb, rl + PREFIXSIZE);
2097 if (tbufptr == NULL) {
2098 msg_read_error("File decompression error while");
2099 if (!yflag && !reply("continue"))
2100 exit(1);
2101 memset(tapebuf, 0, bufsize);
2102 tbufptr = tapebuf;
2103 }
2104
2105 blkcnt = 0;
2106 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2107 blksread++;
2108 tpblksread++;
2109 return;
2110
2111 readerr:
2112 /* Errors while reading from a file or pipe are catastrophic. Since
2113 * there are no block boundaries, it's impossible to bypass the
2114 * block in error and find the start of the next block.
2115 */
2116 if (ret == 0) {
2117 /* It's possible to have multiple input files using -M
2118 * and -f file1,file2...
2119 */
2120 Vprintf(stdout, "End-of-File encountered\n");
2121 if (!pipein) {
2122 newvol = volno + 1;
2123 volno = 0;
2124 numtrec = 0;
2125 getvol(newvol);
2126 readtape(buf);
2127 return;
2128 }
2129 }
2130 msg_read_error("Read error while");
2131 /* if (!yflag && !reply("continue")) */
2132 exit(1);
2133 }
2134
2135 /*
2136 * Read compressed data from a tape and uncompress it.
2137 * Handle read errors, and end of media.
2138 * Since a tape consists of separate physical blocks, we try
2139 * to recover from errors by repositioning the tape to the next
2140 * block.
2141 */
2142 static void
2143 readtape_comprtape(char *buf)
2144 {
2145 long rl, size, i;
2146 int ret, newvol;
2147 struct tapebuf *tpb;
2148 struct mtop tcom;
2149
2150 if (blkcnt < numtrec) {
2151 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2152 blksread++;
2153 tpblksread++;
2154 return;
2155 }
2156 /* need to read the next block */
2157 tbufptr = tapebuf;
2158 for (i = 0; i < ntrec; i++)
2159 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2160 numtrec = ntrec;
2161 tpb = (struct tapebuf *) tapebuf;
2162
2163 /* read the block */
2164 size = bufsize + PREFIXSIZE;
2165 ret = read_a_block(mt, tapebuf, size, &rl);
2166 if (ret <= 0)
2167 goto readerr;
2168
2169 converttapebuf(tpb);
2170 tbufptr = decompress_tapebuf(tpb, rl);
2171 if (tbufptr == NULL) {
2172 msg_read_error("Tape decompression error while");
2173 if (!yflag && !reply("continue"))
2174 exit(1);
2175 memset(tapebuf, 0, PREFIXSIZE + bufsize);
2176 tbufptr = tapebuf;
2177 }
2178 goto moverecord;
2179
2180 readerr:
2181 /* Handle errors: EOT switches to the next volume, other errors
2182 * attempt to position the tape to the next block.
2183 */
2184 if (ret == 0) {
2185 Vprintf(stdout, "End-of-tape encountered\n");
2186 newvol = volno + 1;
2187 volno = 0;
2188 numtrec = 0;
2189 getvol(newvol);
2190 readtape(buf);
2191 return;
2192 }
2193
2194 msg_read_error("Tape read error while");
2195 if (!yflag && !reply("continue"))
2196 exit(1);
2197 memset(tapebuf, 0, PREFIXSIZE + bufsize);
2198 tbufptr = tapebuf;
2199
2200 #ifdef RRESTORE
2201 if (host)
2202 rl = rmtioctl(MTFSR, 1);
2203 else
2204 #endif
2205 {
2206 tcom.mt_op = MTFSR;
2207 tcom.mt_count = 1;
2208 rl = ioctl(mt, MTIOCTOP, &tcom);
2209 }
2210
2211 if (rl < 0) {
2212 warn("continuation failed");
2213 if (!yflag && !reply("assume end-of-tape and continue"))
2214 exit(1);
2215 ret = 0; /* end of tape */
2216 goto readerr;
2217 }
2218
2219 moverecord:
2220 blkcnt = 0;
2221 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2222 blksread++;
2223 tpblksread++;
2224 }
2225
2226 /*
2227 * Decompress a struct tapebuf into a buffer. readsize is the size read
2228 * from the tape/file and is used for error messages. Returns a pointer
2229 * to the location of the uncompressed buffer or NULL on errors.
2230 * Adjust numtrec and complain for a short block.
2231 */
2232 static char *
2233 decompress_tapebuf(struct tapebuf *tpbin, int readsize)
2234 {
2235 /* If zflag is on, all blocks have a struct tapebuf prefix */
2236 /* zflag gets set in setup() from the dump header */
2237 int cresult, blocklen;
2238 unsigned long worklen;
2239 char *output = NULL,*reason = NULL, *lengtherr = NULL;
2240
2241 /* build a length error message */
2242 blocklen = tpbin->length;
2243 if (readsize < blocklen + (int)PREFIXSIZE)
2244 lengtherr = "short";
2245 else
2246 if (readsize > blocklen + (int)PREFIXSIZE)
2247 lengtherr = "long";
2248
2249 worklen = comprlen;
2250 cresult = 1;
2251 if (tpbin->compressed) {
2252 /* uncompress whatever we read, if it fails, complain later */
2253 if (tpbin->flags == COMPRESS_ZLIB) {
2254 #ifndef HAVE_ZLIB
2255 errx(1,"This restore version doesn't support zlib decompression");
2256 #else
2257 cresult = uncompress(comprbuf, &worklen,
2258 tpbin->buf, blocklen);
2259 output = comprbuf;
2260 switch (cresult) {
2261 case Z_OK:
2262 break;
2263 case Z_MEM_ERROR:
2264 reason = "not enough memory";
2265 break;
2266 case Z_BUF_ERROR:
2267 reason = "buffer too small";
2268 break;
2269 case Z_DATA_ERROR:
2270 reason = "data error";
2271 break;
2272 default:
2273 reason = "unknown";
2274 }
2275 if (cresult == Z_OK)
2276 cresult = 1;
2277 else
2278 cresult = 0;
2279 #endif /* HAVE_ZLIB */
2280 }
2281 if (tpbin->flags == COMPRESS_BZLIB) {
2282 #ifndef HAVE_BZLIB
2283 errx(1,"This restore version doesn't support bzlib decompression");
2284 #else
2285 unsigned int worklen2 = worklen;
2286 cresult = BZ2_bzBuffToBuffDecompress(
2287 comprbuf, &worklen2,
2288 tpbin->buf, blocklen, 0, 0);
2289 worklen = worklen2;
2290 output = comprbuf;
2291 switch (cresult) {
2292 case BZ_OK:
2293 break;
2294 case BZ_MEM_ERROR:
2295 reason = "not enough memory";
2296 break;
2297 case BZ_OUTBUFF_FULL:
2298 reason = "buffer too small";
2299 break;
2300 case BZ_DATA_ERROR:
2301 case BZ_DATA_ERROR_MAGIC:
2302 case BZ_UNEXPECTED_EOF:
2303 reason = "data error";
2304 break;
2305 default:
2306 reason = "unknown";
2307 }
2308 if (cresult == BZ_OK)
2309 cresult = 1;
2310 else
2311 cresult = 0;
2312 #endif /* HAVE_BZLIB */
2313 }
2314 if (tpbin->flags == COMPRESS_LZO) {
2315 #ifndef HAVE_LZO
2316 errx(1,"This restore version doesn't support lzo decompression");
2317 #else
2318 lzo_uint worklen2 = worklen;
2319 cresult = lzo1x_decompress(tpbin->buf, blocklen,
2320 comprbuf, &worklen2, NULL);
2321 worklen = worklen2;
2322 output = comprbuf;
2323 switch (cresult) {
2324 case LZO_E_OK:
2325 break;
2326 case LZO_E_ERROR:
2327 case LZO_E_EOF_NOT_FOUND:
2328 reason = "data error";
2329 break;
2330 default:
2331 reason = "unknown";
2332 }
2333 if (cresult == LZO_E_OK)
2334 cresult = 1;
2335 else
2336 cresult = 0;
2337 #endif /* HAVE_LZO */
2338 }
2339 }
2340 else {
2341 output = tpbin->buf;
2342 worklen = blocklen;
2343 }
2344 if (cresult) {
2345 numtrec = worklen / TP_BSIZE;
2346 if (worklen % TP_BSIZE != 0)
2347 reason = "length mismatch";
2348 }
2349 if (reason) {
2350 if (lengtherr)
2351 fprintf(stderr, "%s compressed block: %d expected: %u\n",
2352 lengtherr, readsize, tpbin->length + PREFIXSIZE);
2353 fprintf(stderr, "decompression error, block %ld: %s\n",
2354 tpblksread+1, reason);
2355 if (!cresult)
2356 output = NULL;
2357 }
2358 return output;
2359 }
2360
2361 /*
2362 * Print an error message for a read error.
2363 * This was exteracted from the original readtape().
2364 */
2365 static void
2366 msg_read_error(char *m)
2367 {
2368 switch (curfile.action) {
2369 default:
2370 fprintf(stderr, "%s trying to set up tape\n", m);
2371 break;
2372 case UNKNOWN:
2373 fprintf(stderr, "%s trying to resynchronize\n", m);
2374 break;
2375 case USING:
2376 fprintf(stderr, "%s restoring %s\n", m, curfile.name);
2377 break;
2378 case SKIP:
2379 fprintf(stderr, "%s skipping over inode %lu\n", m,
2380 (unsigned long)curfile.ino);
2381 break;
2382 }
2383 }
2384 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
2385
2386 /*
2387 * Read the first block and get the blocksize from it. Test
2388 * for a compressed dump tape/file. setup() will make the final
2389 * determination by checking the compressed flag if gethead()
2390 * finds a valid header. The test here is necessary to offset the buffer
2391 * by the size of the compressed prefix. zflag is set here so that
2392 * readtape_set can set the correct function pointer for readtape().
2393 * Note that the first block of each tape/file is not compressed
2394 * and does not have a prefix.
2395 */
2396 static void
2397 findtapeblksize(void)
2398 {
2399 long i;
2400 size_t len;
2401 struct tapebuf *tpb = (struct tapebuf *) tapebuf;
2402 struct s_spcl spclpt;
2403
2404 for (i = 0; i < ntrec; i++)
2405 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2406 blkcnt = 0;
2407 tbufptr = tapebuf;
2408 /*
2409 * For a pipe or file, read in the first record. For a tape, read
2410 * the first block.
2411 */
2412 len = magtapein ? ntrec * TP_BSIZE : TP_BSIZE;
2413
2414 if (read_a_block(mt, tapebuf, len, &i) <= 0)
2415 errx(1, "Tape read error on first record");
2416
2417 memcpy(&spclpt, tapebuf, TP_BSIZE);
2418 cvtflag = 0;
2419 if (converthead(&spclpt) == FAIL) {
2420 cvtflag++;
2421 if (converthead(&spclpt) == FAIL) {
2422 /* Special case for old compressed tapes with prefix */
2423 if (magtapein && (i % TP_BSIZE != 0))
2424 goto oldformat;
2425 errx(1, "Tape is not a dump tape");
2426 }
2427 fprintf(stderr, "Converting to new file system format.\n");
2428 }
2429 /*
2430 * If the input is from a file or a pipe, we read TP_BSIZE
2431 * bytes looking for a dump header. If the dump is compressed
2432 * we need to read in the rest of the block, as determined
2433 * by c_ntrec in the dump header. The first block of the
2434 * dump is not compressed and does not have a prefix.
2435 */
2436 if (!magtapein) {
2437 if (spclpt.c_type == TS_TAPE
2438 && spclpt.c_flags & DR_COMPRESSED) {
2439 /* It's a compressed dump file, read in the */
2440 /* rest of the block based on spclpt.c_ntrec. */
2441 if (spclpt.c_ntrec > ntrec)
2442 errx(1, "Tape blocksize is too large, use "
2443 "\'-b %d\' ", spclpt.c_ntrec);
2444 ntrec = spclpt.c_ntrec;
2445 len = (ntrec - 1) * TP_BSIZE;
2446 zflag = 1;
2447 }
2448 else {
2449 /* read in the rest of the block based on bufsize */
2450 len = bufsize - TP_BSIZE;
2451 }
2452 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) < 0
2453 || (i != (long)len && i % TP_BSIZE != 0))
2454 errx(1,"Error reading dump file header");
2455 tbufptr = tapebuf;
2456 numtrec = ntrec;
2457 Vprintf(stdout, "Input block size is %ld\n", ntrec);
2458 return;
2459 } /* if (!magtapein) */
2460
2461 /*
2462 * If the input is a tape, we tried to read ntrec * TP_BSIZE bytes.
2463 * If the value of ntrec is too large, we read less than
2464 * what we asked for; adjust the value of ntrec and test for
2465 * a compressed dump tape.
2466 */
2467 if (i % TP_BSIZE != 0) {
2468 oldformat:
2469 /* may be old format compressed dump tape with a prefix */
2470 memcpy(&spclpt, tpb->buf, TP_BSIZE);
2471 cvtflag = 0;
2472 if (converthead(&spclpt) == FAIL) {
2473 cvtflag++;
2474 if (converthead(&spclpt) == FAIL)
2475 errx(1, "Tape is not a dump tape");
2476 fprintf(stderr, "Converting to new file system format.\n");
2477 }
2478 if (i % TP_BSIZE == PREFIXSIZE
2479 && tpb->compressed == 0
2480 && spclpt.c_type == TS_TAPE
2481 && spclpt.c_flags & DR_COMPRESSED) {
2482 zflag = 1;
2483 tbufptr = tpb->buf;
2484 if (tpb->length > bufsize)
2485 errx(1, "Tape blocksize is too large, use "
2486 "\'-b %d\' ", tpb->length / TP_BSIZE);
2487 }
2488 else
2489 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
2490 i, TP_BSIZE);
2491 }
2492 ntrec = i / TP_BSIZE;
2493 if (spclpt.c_type == TS_TAPE) {
2494 if (spclpt.c_flags & DR_COMPRESSED)
2495 zflag = 1;
2496 if (spclpt.c_ntrec > ntrec)
2497 errx(1, "Tape blocksize is too large, use "
2498 "\'-b %d\' ", spclpt.c_ntrec);
2499 }
2500 numtrec = ntrec;
2501 Vprintf(stdout, "Tape block size is %ld\n", ntrec);
2502 }
2503
2504 /*
2505 * Read a block of data handling all of the messy details.
2506 */
2507 static int read_a_block(int fd, char *buf, size_t len, long *lengthread)
2508 {
2509 long i = 1, size;
2510
2511 size = len;
2512 while (size > 0) {
2513 #ifdef RRESTORE
2514 if (!Afile && host)
2515 i = rmtread(buf, size);
2516 else
2517 #endif
2518 i = read(fd, buf, size);
2519
2520 if (i <= 0)
2521 break; /* EOD or error */
2522 size -= i;
2523 if (magtapein)
2524 break; /* block at a time for mt */
2525 buf += i;
2526 }
2527 *lengthread = len - size;
2528 return i;
2529 }
2530
2531 void
2532 closemt(void)
2533 {
2534
2535 if (mt < 0)
2536 return;
2537 #ifdef RRESTORE
2538 if (!Afile && host)
2539 rmtclose();
2540 else
2541 #endif
2542 (void) close(mt);
2543 }
2544
2545 static void
2546 setmagtapein(void) {
2547 struct mtget mt_stat;
2548 static int done = 0;
2549 if (done)
2550 return;
2551 done = 1;
2552 if (!pipein) {
2553 /* need to know if input is really from a tape */
2554 #ifdef RRESTORE
2555 if (host)
2556 magtapein = !lflag;
2557 else
2558 #endif
2559 magtapein = ioctl(mt, MTIOCGET, (char *)&mt_stat) == 0;
2560 }
2561
2562 Vprintf(stdout,"Input is from a %s %s\n",
2563 host ? "remote" : "local",
2564 magtapein ? "tape" :
2565 Vflag ? "multi-volume (no tape)" : "file/pipe");
2566 }
2567
2568 /*
2569 * Read the next block from the tape.
2570 * Check to see if it is one of several vintage headers.
2571 * If it is an old style header, convert it to a new style header.
2572 * If it is not any valid header, return an error.
2573 */
2574 static int
2575 gethead(struct s_spcl *buf)
2576 {
2577 readtape((char *)buf);
2578 return converthead(buf);
2579 }
2580
2581 static int
2582 converthead(struct s_spcl *buf)
2583 {
2584 int32_t i;
2585 union {
2586 quad_t qval;
2587 int32_t val[2];
2588 } qcvt;
2589 union u_ospcl {
2590 char dummy[TP_BSIZE];
2591 struct s_ospcl {
2592 int32_t c_type;
2593 int32_t c_date;
2594 int32_t c_ddate;
2595 int32_t c_volume;
2596 int32_t c_tapea;
2597 u_int16_t c_inumber;
2598 int32_t c_magic;
2599 int32_t c_checksum;
2600 struct odinode {
2601 u_int16_t odi_mode;
2602 u_int16_t odi_nlink;
2603 u_int16_t odi_uid;
2604 u_int16_t odi_gid;
2605 int32_t odi_size;
2606 int32_t odi_rdev;
2607 char odi_addr[36];
2608 int32_t odi_atime;
2609 int32_t odi_mtime;
2610 int32_t odi_ctime;
2611 } c_dinode;
2612 int32_t c_count;
2613 char c_fill[256];
2614 } s_ospcl;
2615 } u_ospcl;
2616
2617 if (!cvtflag) {
2618 if (buf->c_magic != NFS_MAGIC) {
2619 if (swabi(buf->c_magic) != NFS_MAGIC)
2620 return (FAIL);
2621 if (!Bcvt) {
2622 Vprintf(stdout, "Note: Doing Byte swapping\n");
2623 Bcvt = 1;
2624 }
2625 }
2626 if (checksum((int *)buf) == FAIL)
2627 return (FAIL);
2628 if (Bcvt)
2629 swabst((u_char *)"8i4s1l29i528bi192b4i", (u_char *)buf);
2630 goto good;
2631 }
2632 memcpy(&u_ospcl.s_ospcl, buf, TP_BSIZE);
2633 if (checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
2634 return(FAIL);
2635 if (u_ospcl.s_ospcl.c_magic == OFS_MAGIC) {
2636 memset((char *)buf, 0, (long)TP_BSIZE);
2637 buf->c_type = u_ospcl.s_ospcl.c_type;
2638 buf->c_date = u_ospcl.s_ospcl.c_date;
2639 buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
2640 buf->c_volume = u_ospcl.s_ospcl.c_volume;
2641 buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
2642 buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
2643 buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
2644 buf->c_magic = u_ospcl.s_ospcl.c_magic;
2645 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
2646 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
2647 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
2648 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
2649 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
2650 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
2651 #if defined(__linux__) || defined(sunos)
2652 buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime;
2653 buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2654 buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2655 #else /* __linux__ || sunos */
2656 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
2657 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2658 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2659 #endif /* __linux__ || sunos */
2660 buf->c_count = u_ospcl.s_ospcl.c_count;
2661 memmove(buf->c_addr, u_ospcl.s_ospcl.c_fill, (long)256);
2662 }
2663 else if (u_ospcl.s_ospcl.c_magic == FS_UFS2_MAGIC) {
2664 buf->c_date = (int32_t)(*(int64_t *)&u_ospcl.dummy[896]);
2665 buf->c_ddate = (int32_t)(*(int64_t *)&u_ospcl.dummy[904]);
2666 buf->c_tapea = (int32_t)(*(int64_t *)&u_ospcl.dummy[912]);
2667 buf->c_firstrec = (int32_t)(*(int64_t *)&u_ospcl.dummy[920]);
2668 buf->c_ntrec = 0;
2669 buf->c_extattributes = 0;
2670 buf->c_flags |= DR_NEWINODEFMT;
2671 ufs2flag = 1;
2672 }
2673 else
2674 return(FAIL);
2675 buf->c_magic = NFS_MAGIC;
2676
2677 good:
2678 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
2679 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
2680 qcvt.qval = buf->c_dinode.di_size;
2681 if (qcvt.val[0] || qcvt.val[1]) {
2682 Vprintf(stdout, "Note: Doing Quad swapping\n");
2683 Qcvt = 1;
2684 }
2685 }
2686 if (Qcvt) {
2687 qcvt.qval = buf->c_dinode.di_size;
2688 i = qcvt.val[1];
2689 qcvt.val[1] = qcvt.val[0];
2690 qcvt.val[0] = i;
2691 buf->c_dinode.di_size = qcvt.qval;
2692 }
2693 readmapflag = 0;
2694
2695 switch (buf->c_type) {
2696
2697 case TS_CLRI:
2698 case TS_BITS:
2699 /*
2700 * Have to patch up missing information in bit map headers
2701 */
2702 buf->c_inumber = 0;
2703 buf->c_dinode.di_size = buf->c_count * TP_BSIZE;
2704 if (buf->c_count > TP_NINDIR)
2705 readmapflag = 1;
2706 else
2707 for (i = 0; i < buf->c_count; i++)
2708 buf->c_addr[i]++;
2709 break;
2710
2711 case TS_TAPE:
2712 if ((buf->c_flags & DR_NEWINODEFMT) == 0)
2713 oldinofmt = 1;
2714 /* fall through */
2715 case TS_END:
2716 buf->c_inumber = 0;
2717 if (buf->c_flags & DR_INODEINFO) {
2718 memcpy(volinfo, buf->c_inos, TP_NINOS * sizeof(dump_ino_t));
2719 if (Bcvt)
2720 swabst((u_char *)"128i", (u_char *)volinfo);
2721 }
2722 break;
2723
2724 case TS_INODE:
2725 case TS_ADDR:
2726 break;
2727
2728 default:
2729 panic("gethead: unknown inode type %d\n", buf->c_type);
2730 break;
2731 }
2732 /*
2733 * If we are restoring a filesystem with old format inodes,
2734 * copy the uid/gid to the new location.
2735 */
2736 if (oldinofmt) {
2737 buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
2738 buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
2739 }
2740 if (dflag)
2741 accthdr(buf);
2742 return(GOOD);
2743 }
2744
2745 static void
2746 converttapebuf(struct tapebuf *tpb)
2747 {
2748 if (Bcvt) {
2749 struct tb {
2750 unsigned int length:28;
2751 unsigned int flags:3;
2752 unsigned int compressed:1;
2753 } tb;
2754 swabst((u_char *)"i", (u_char *)tpb);
2755 memcpy(&tb, tpb, 4);
2756 tpb->length = tb.length;
2757 tpb->flags = tb.flags;
2758 tpb->compressed = tb.compressed;
2759 }
2760 }
2761
2762 /*
2763 * Check that a header is where it belongs and predict the next header
2764 */
2765 static void
2766 accthdr(struct s_spcl *header)
2767 {
2768 static dump_ino_t previno = 0x7fffffff;
2769 static int prevtype;
2770 static long predict;
2771 long blks, i;
2772
2773 if (header->c_type == TS_TAPE) {
2774 fprintf(stderr, "Volume header (%s inode format) ",
2775 oldinofmt ? "old" : "new");
2776 if (header->c_firstrec)
2777 fprintf(stderr, "begins with record %d",
2778 header->c_firstrec);
2779 fprintf(stderr, "\n");
2780 previno = 0x7fffffff;
2781 return;
2782 }
2783 if (previno == 0x7fffffff)
2784 goto newcalc;
2785 switch (prevtype) {
2786 case TS_BITS:
2787 fprintf(stderr, "Dumped inodes map header");
2788 break;
2789 case TS_CLRI:
2790 fprintf(stderr, "Used inodes map header");
2791 break;
2792 case TS_INODE:
2793 fprintf(stderr, "File header, ino %lu", (unsigned long)previno);
2794 break;
2795 case TS_ADDR:
2796 fprintf(stderr, "File continuation header, ino %ld", (long)previno);
2797 break;
2798 case TS_END:
2799 fprintf(stderr, "End of tape header");
2800 break;
2801 }
2802 if (predict != blksread - 1)
2803 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
2804 predict, blksread - 1);
2805 fprintf(stderr, "\n");
2806 newcalc:
2807 blks = 0;
2808 if (header->c_type != TS_END)
2809 for (i = 0; i < header->c_count; i++)
2810 if (readmapflag || header->c_addr[i] != 0)
2811 blks++;
2812 predict = blks;
2813 blksread = 0;
2814 prevtype = header->c_type;
2815 previno = header->c_inumber;
2816 }
2817
2818 /*
2819 * Find an inode header.
2820 * Complain if had to skip, and complain is set.
2821 */
2822 static void
2823 findinode(struct s_spcl *header)
2824 {
2825 static long skipcnt = 0;
2826 long i;
2827 char buf[TP_BSIZE];
2828
2829 curfile.name = "<name unknown>";
2830 curfile.action = UNKNOWN;
2831 curfile.dip = NULL;
2832 curfile.ino = 0;
2833 do {
2834 if (header->c_magic != NFS_MAGIC) {
2835 skipcnt++;
2836 while (gethead(header) == FAIL ||
2837 header->c_date != dumpdate)
2838 skipcnt++;
2839 }
2840 switch (header->c_type) {
2841
2842 case TS_ADDR:
2843 /*
2844 * Skip up to the beginning of the next record
2845 */
2846 for (i = 0; i < header->c_count; i++)
2847 if (header->c_addr[i])
2848 readtape(buf);
2849 while (gethead(header) == FAIL ||
2850 header->c_date != dumpdate)
2851 skipcnt++;
2852 break;
2853
2854 case TS_INODE:
2855 curfile.dip = &header->c_dinode;
2856 curfile.ino = header->c_inumber;
2857 break;
2858
2859 case TS_END:
2860 curfile.ino = maxino;
2861 break;
2862
2863 case TS_CLRI:
2864 curfile.name = "<file removal list>";
2865 break;
2866
2867 case TS_BITS:
2868 curfile.name = "<file dump list>";
2869 break;
2870
2871 case TS_TAPE:
2872 panic("unexpected tape header\n");
2873 /* NOTREACHED */
2874
2875 default:
2876 panic("unknown tape header type %d\n", spcl.c_type);
2877 /* NOTREACHED */
2878
2879 }
2880 } while (header->c_type == TS_ADDR);
2881 if (skipcnt > 0)
2882 #ifdef USE_QFA
2883 if (!noresyncmesg)
2884 #endif
2885 fprintf(stderr, "resync restore, skipped %ld blocks\n",
2886 skipcnt);
2887 skipcnt = 0;
2888 }
2889
2890 static int
2891 checksum(int *buf)
2892 {
2893 int i, j;
2894
2895 j = sizeof(union u_spcl) / sizeof(int);
2896 i = 0;
2897 if(!Bcvt) {
2898 do
2899 i += *buf++;
2900 while (--j);
2901 } else {
2902 /* What happens if we want to read restore tapes
2903 for a 16bit int machine??? */
2904 do
2905 i += swabi(*buf++);
2906 while (--j);
2907 }
2908
2909 if (i != CHECKSUM) {
2910 fprintf(stderr, "Checksum error %o, inode %lu file %s\n", i,
2911 (unsigned long)curfile.ino, curfile.name);
2912 return(FAIL);
2913 }
2914 return(GOOD);
2915 }
2916
2917 #ifdef RRESTORE
2918 #ifdef __STDC__
2919 #include <stdarg.h>
2920 #else
2921 #include <varargs.h>
2922 #endif
2923
2924 void
2925 #ifdef __STDC__
2926 msg(const char *fmt, ...)
2927 #else
2928 msg(fmt, va_alist)
2929 char *fmt;
2930 va_dcl
2931 #endif
2932 {
2933 va_list ap;
2934 #ifdef __STDC__
2935 va_start(ap, fmt);
2936 #else
2937 va_start(ap);
2938 #endif
2939 (void)vfprintf(stderr, fmt, ap);
2940 va_end(ap);
2941 }
2942 #endif /* RRESTORE */
2943
2944 static u_char *
2945 swab16(u_char *sp, int n)
2946 {
2947 char c;
2948
2949 while (--n >= 0) {
2950 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
2951 sp += 2;
2952 }
2953 return (sp);
2954 }
2955
2956 static u_char *
2957 swab32(u_char *sp, int n)
2958 {
2959 char c;
2960
2961 while (--n >= 0) {
2962 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
2963 c = sp[1]; sp[1] = sp[2]; sp[2] = c;
2964 sp += 4;
2965 }
2966 return (sp);
2967 }
2968
2969 static u_char *
2970 swab64(u_char *sp, int n)
2971 {
2972 char c;
2973
2974 while (--n >= 0) {
2975 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
2976 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
2977 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
2978 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
2979 sp += 8;
2980 }
2981 return (sp);
2982 }
2983
2984 void
2985 swabst(u_char *cp, u_char *sp)
2986 {
2987 int n = 0;
2988
2989 while (*cp) {
2990 switch (*cp) {
2991 case '0': case '1': case '2': case '3': case '4':
2992 case '5': case '6': case '7': case '8': case '9':
2993 n = (n * 10) + (*cp++ - '0');
2994 continue;
2995
2996 case 's': case 'w': case 'h':
2997 if (n == 0)
2998 n = 1;
2999 sp = swab16(sp, n);
3000 break;
3001
3002 case 'i':
3003 if (n == 0)
3004 n = 1;
3005 sp = swab32(sp, n);
3006 break;
3007
3008 case 'l':
3009 if (n == 0)
3010 n = 1;
3011 sp = swab64(sp, n);
3012 break;
3013
3014 default: /* Any other character, like 'b' counts as byte. */
3015 if (n == 0)
3016 n = 1;
3017 sp += n;
3018 break;
3019 }
3020 cp++;
3021 n = 0;
3022 }
3023 }
3024
3025 static u_int
3026 swabi(u_int x)
3027 {
3028 swabst((u_char *)"i", (u_char *)&x);
3029 return (x);
3030 }
3031
3032 #if 0
3033 static u_long
3034 swabl(u_long x)
3035 {
3036 swabst((u_char *)"l", (u_char *)&x);
3037 return (x);
3038 }
3039 #endif
3040
3041 void
3042 RequestVol(long tnum)
3043 {
3044 FLUSHTAPEBUF();
3045 getvol(tnum);
3046 }
3047
3048 #ifdef USE_QFA
3049 #ifdef sunos
3050 extern int fdsmtc;
3051
3052 struct uscsi_cmd {
3053 int uscsi_flags; /* read, write, etc. see below */
3054 short uscsi_status; /* resulting status */
3055 short uscsi_timeout; /* Command Timeout */
3056 caddr_t uscsi_cdb; /* cdb to send to target */
3057 caddr_t uscsi_bufaddr; /* i/o source/destination */
3058 u_int uscsi_buflen; /* size of i/o to take place */
3059 u_int uscsi_resid; /* resid from i/o operation */
3060 u_char uscsi_cdblen; /* # of valid cdb bytes */
3061 u_char uscsi_rqlen; /* size of uscsi_rqbuf */
3062 u_char uscsi_rqstatus; /* status of request sense cmd */
3063 u_char uscsi_rqresid; /* resid of request sense cmd */
3064 caddr_t uscsi_rqbuf; /* request sense buffer */
3065 void *uscsi_reserved_5; /* Reserved for Future Use */
3066 };
3067
3068 #define CDB_GROUP0 6 /* 6-byte cdb's */
3069 #define CDB_GROUP1 10 /* 10-byte cdb's */
3070 #define CDB_GROUP2 10 /* 10-byte cdb's */
3071 #define CDB_GROUP3 0 /* reserved */
3072 #define CDB_GROUP4 16 /* 16-byte cdb's */
3073 #define CDB_GROUP5 12 /* 12-byte cdb's */
3074 #define CDB_GROUP6 0 /* reserved */
3075 #define CDB_GROUP7 0 /* reserved */
3076
3077 #define USCSI_WRITE 0x00000 /* send data to device */
3078 #define USCSI_SILENT 0x00001 /* no error messages */
3079 #define USCSI_DIAGNOSE 0x00002 /* fail if any error occurs */
3080 #define USCSI_ISOLATE 0x00004 /* isolate from normal commands */
3081 #define USCSI_READ 0x00008 /* get data from device */
3082 #define USCSI_RESET 0x04000 /* Reset target */
3083 #define USCSI_RESET_ALL 0x08000 /* Reset all targets */
3084 #define USCSI_RQENABLE 0x10000 /* Enable Request Sense extensions */
3085
3086 #define USCSIIOC (0x04 << 8)
3087 #define USCSICMD (USCSIIOC|201) /* user scsi command */
3088
3089 #define USCSI_TIMEOUT 30
3090 #define USCSI_SHORT_TIMEOUT 900
3091 #define USCSI_LONG_TIMEOUT 14000
3092
3093 #define B(s,i) ((unsigned char)((s) >> i))
3094 #define B1(s) ((unsigned char)(s))
3095
3096 #define MSB4(s,v) *(s)=B(v,24),(s)[1]=B(v,16), (s)[2]=B(v,8), (s)[3]=B1(v)
3097
3098
3099 int
3100 GetTapePos(long long *pos)
3101 {
3102 int err = 0;
3103 struct uscsi_cmd scmd;
3104 char buf[512];
3105 char parm[512 * 8];
3106 long lpos;
3107
3108 (void)memset((void *)buf, 0, sizeof(buf));
3109 (void)memset((void *)&scmd, 0, sizeof(scmd));
3110 scmd.uscsi_flags = USCSI_READ|USCSI_SILENT;
3111 scmd.uscsi_timeout = USCSI_TIMEOUT;
3112 scmd.uscsi_cdb = buf;
3113 scmd.uscsi_cdblen = CDB_GROUP1;
3114 buf[0] = 0x34; /* read position */
3115 buf[1] = 0;
3116 (void)memset((void *)parm, 0, 512);
3117 scmd.uscsi_bufaddr = parm;
3118 scmd.uscsi_buflen = 56;
3119 if (ioctl(fdsmtc, USCSICMD, &scmd) == -1) {
3120 err = errno;
3121 return err;
3122 }
3123 (void)memcpy(&lpos, &parm[4], sizeof(long));
3124 *pos = lpos;
3125 return err;
3126 }
3127
3128 int
3129 GotoTapePos(long long pos)
3130 {
3131 int err = 0;
3132 struct uscsi_cmd scmd;
3133 char buf[512];
3134 char parm[512 * 8];
3135 long lpos = (long)pos;
3136
3137 (void)memset((void *)buf, 0, sizeof(buf));
3138 (void)memset((void *)&scmd, 0, sizeof(scmd));
3139 scmd.uscsi_flags = USCSI_WRITE|USCSI_SILENT;
3140 scmd.uscsi_timeout = 360; /* 5 Minutes */
3141 scmd.uscsi_cdb = buf;
3142 scmd.uscsi_cdblen = CDB_GROUP1;
3143 buf[0] = 0x2b; /* locate */
3144 buf[1] = 0;
3145 MSB4(&buf[3], lpos);
3146 (void)memset((void *)parm, 0, 512);
3147 scmd.uscsi_bufaddr = NULL;
3148 scmd.uscsi_buflen = 0;
3149 if (ioctl(fdsmtc, USCSICMD, &scmd) == -1) {
3150 err = errno;
3151 return err;
3152 }
3153 return err;
3154 }
3155 #endif
3156
3157 #define LSEEK_GET_TAPEPOS 10
3158 #define LSEEK_GO2_TAPEPOS 11
3159
3160 #ifdef __linux__
3161 typedef struct mt_pos {
3162 short mt_op;
3163 int mt_count;
3164 } MTPosRec, *MTPosPtr;
3165
3166
3167 /*
3168 * get the current position of the tape
3169 */
3170 int
3171 GetTapePos(long long *pos)
3172 {
3173 int err = 0;
3174
3175 #ifdef RDUMP
3176 if (host) {
3177 *pos = (long long) rmtseek((OFF_T)0, (int)LSEEK_GET_TAPEPOS);
3178 err = *pos < 0;
3179 }
3180 else
3181 #endif
3182 {
3183 if (magtapein) {
3184 long mtpos;
3185 *pos = 0;
3186 err = (ioctl(mt, MTIOCPOS, &mtpos) < 0);
3187 *pos = (long long)mtpos;
3188 }
3189 else {
3190 *pos = LSEEK(mt, 0, SEEK_CUR);
3191 err = (*pos < 0);
3192 }
3193 }
3194 if (err) {
3195 err = errno;
3196 fprintf(stdout, "[%ld] error: %d (getting tapepos: %lld)\n",
3197 (unsigned long)getpid(), err, *pos);
3198 return err;
3199 }
3200 return err;
3201 }
3202
3203 /*
3204 * go to specified position on tape
3205 */
3206 int
3207 GotoTapePos(long long pos)
3208 {
3209 int err = 0;
3210
3211 #ifdef RDUMP
3212 if (host)
3213 err = (rmtseek((OFF_T)pos, (int)LSEEK_GO2_TAPEPOS) < 0);
3214 else
3215 #endif
3216 {
3217 if (magtapein) {
3218 struct mt_pos buf;
3219 buf.mt_op = MTSEEK;
3220 buf.mt_count = (int) pos;
3221 err = (ioctl(mt, MTIOCTOP, &buf) < 0);
3222 }
3223 else {
3224 pos = LSEEK(mt, pos, SEEK_SET);
3225 err = (pos < 0);
3226 }
3227 }
3228 if (err) {
3229 err = errno;
3230 fprintf(stdout, "[%ld] error: %d (setting tapepos: %lld)\n",
3231 (unsigned long)getpid(), err, pos);
3232 return err;
3233 }
3234 return err;
3235 }
3236 #endif /* __linux__ */
3237
3238 /*
3239 * read next data from tape to re-sync
3240 */
3241 void
3242 ReReadFromTape(void)
3243 {
3244 FLUSHTAPEBUF();
3245 noresyncmesg = 1;
3246 if (gethead(&spcl) == FAIL) {
3247 #ifdef DEBUG_QFA
3248 fprintf(stdout, "DEBUG 1 gethead failed\n");
3249 #endif
3250 }
3251 findinode(&spcl);
3252 noresyncmesg = 0;
3253 }
3254
3255 void
3256 ReReadInodeFromTape(dump_ino_t theino)
3257 {
3258 long cntloop = 0;
3259
3260 FLUSHTAPEBUF();
3261 noresyncmesg = 1;
3262 do {
3263 cntloop++;
3264 gethead(&spcl);
3265 } while (!(spcl.c_inumber == theino && spcl.c_type == TS_INODE && spcl.c_date == dumpdate));
3266 #ifdef DEBUG_QFA
3267 fprintf(stderr, "DEBUG: %ld reads\n", cntloop);
3268 fprintf(stderr, "DEBUG: bufsize %ld\n", bufsize);
3269 fprintf(stderr, "DEBUG: ntrec %ld\n", ntrec);
3270 fprintf(stderr, "DEBUG: %ld reads\n", cntloop);
3271 #endif
3272 findinode(&spcl);
3273 noresyncmesg = 0;
3274 }
3275
3276 #ifdef sunos
3277 int
3278 OpenSMTCmt(char *themagtape)
3279 {
3280 if (GetSCSIIDFromPath(themagtape, &scsiid)) {
3281 fprintf(stderr, "can't get SCSI-ID for %s\n", themagtape);
3282 return -1;
3283 }
3284 if (scsiid < 0) {
3285 fprintf(stderr, "can't get SCSI-ID for %s\n", themagtape);
3286 return -1;
3287 }
3288 sprintf(smtcpath, "/dev/rsmtc%ld,0", scsiid);
3289 if ((fdsmtc = open(smtcpath, O_RDWR)) == -1) {
3290 fprintf(stderr, "can't open smtc device: %s, %d\n", smtcpath, errno);
3291 return -1;
3292 }
3293 return 0;
3294 }
3295 #endif /* sunos */
3296 #endif /* USE_QFA */
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