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Fix invalid EA metainformation in dump, add a workaround to restore to
[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 1.96 2010/03/22 15:40:55 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 blksread = 0;
478 }
479 if (pipein) {
480 if (nextvol != 1)
481 panic("Changing volumes on pipe input?\n");
482 if (volno == 1)
483 return;
484 goto gethdr;
485 }
486 saved_blksread = blksread;
487 saved_tpblksread = tpblksread;
488 #if defined(USE_QFA) && defined(sunos)
489 if (createtapeposflag || tapeposflag)
490 close(fdsmtc);
491 #endif
492 again:
493 if (pipein)
494 exit(1); /* pipes do not get a second chance */
495 if (aflag || curfile.action != SKIP) {
496 newvol = nextvol;
497 wantnext = 1;
498 } else {
499 newvol = 0;
500 wantnext = 0;
501 }
502 while (newvol <= 0) {
503 if (tapesread == 0) {
504 fprintf(stderr, "%s%s%s%s%s",
505 "You have not read any volumes yet.\n",
506 "Unless you know which volume your",
507 " file(s) are on you should start\n",
508 "with the last volume and work",
509 " towards the first.\n");
510 } else {
511 fprintf(stderr, "You have read volumes");
512 strcpy(buf, ": ");
513 for (i = 1; i < 32; i++)
514 if (tapesread & (1 << i)) {
515 fprintf(stderr, "%s%ld", buf, (long)i);
516 strcpy(buf, ", ");
517 }
518 fprintf(stderr, "\n");
519 }
520 do {
521 fprintf(stderr, "Specify next volume # (none if no more volumes): ");
522 (void) fflush(stderr);
523 (void) fgets(buf, TP_BSIZE, terminal);
524 } while (!feof(terminal) && buf[0] == '\n');
525 if (feof(terminal))
526 exit(1);
527 if (!strcmp(buf, "none\n")) {
528 terminateinput();
529 return;
530 }
531 newvol = atoi(buf);
532 if (newvol <= 0) {
533 fprintf(stderr,
534 "Volume numbers are positive numerics\n");
535 }
536 }
537 if (newvol == volno) {
538 tapesread |= 1 << volno;
539 #if defined(USE_QFA) && defined(sunos)
540 if (createtapeposflag || tapeposflag) {
541 if (OpenSMTCmt(magtape) < 0) {
542 volno = -1;
543 haderror = 1;
544 goto again;
545 }
546 }
547 #endif /* USE_QFA */
548 return;
549 }
550 closemt();
551
552 /*
553 * if using an archive file, reset its name so readtape()
554 * could properly use remote access.
555 */
556 Afile = NULL;
557
558 if (Mflag) {
559 snprintf(magtape, MAXPATHLEN, "%s%03ld", magtapeprefix, newvol);
560 magtape[MAXPATHLEN - 1] = '\0';
561 }
562 if (bot_script && !haderror) {
563 msg("Launching %s\n", bot_script);
564 bot_code = system_command(bot_script, magtape, newvol);
565 if (bot_code != 0 && bot_code != 1) {
566 msg("Restore aborted by the beginning of tape script\n");
567 exit(1);
568 }
569 }
570 if (haderror || (bot_code && !Mflag)) {
571 haderror = 0;
572 if (compare_errors)
573 fprintf(stderr, "%d compare errors so far\n", compare_errors);
574 #ifdef sunos
575 fprintf(stderr, "Mount volume %ld\n", (long)newvol);
576 #else
577 fprintf(stderr, "Mount tape volume %ld\n", (long)newvol);
578 #endif
579 fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
580 #ifdef sunos
581 fprintf(stderr, "then enter volume name (default: %s) ", magtape);
582 #else
583 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
584 #endif
585 (void) fflush(stderr);
586 (void) fgets(buf, TP_BSIZE, terminal);
587 if (feof(terminal))
588 exit(1);
589 if (!strcmp(buf, "none\n")) {
590 terminateinput();
591 return;
592 }
593 if (buf[0] != '\n') {
594 char *pos;
595 (void) strncpy(magtape, buf, sizeof(magtape));
596 magtape[sizeof(magtape) - 1] = '\0';
597 if ((pos = strchr(magtape, '\n')))
598 magtape[pos - magtape] = '\0';
599 }
600 }
601 #if defined(USE_QFA) && defined(sunos)
602 if (createtapeposflag || tapeposflag) {
603 if (OpenSMTCmt(magtape) < 0) {
604 volno = -1;
605 haderror = 1;
606 goto again;
607 }
608 }
609 #endif /* USE_QFA */
610 #ifdef RRESTORE
611 if (host)
612 mt = rmtopen(magtape, O_RDONLY);
613 else
614 #endif
615 mt = OPEN(magtape, O_RDONLY, 0);
616
617 if (mt == -1) {
618 fprintf(stderr, "Cannot open %s\n", magtape);
619 volno = -1;
620 haderror = 1;
621 goto again;
622 }
623 gethdr:
624 setmagtapein();
625 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
626 readtape_func = readtape_set;
627 #endif
628 volno = newvol;
629 setdumpnum();
630 FLUSHTAPEBUF();
631 findtapeblksize();
632 if (gethead(&tmpbuf) == FAIL) {
633 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
634 fprintf(stderr, "tape is not dump tape\n");
635 volno = 0;
636 haderror = 1;
637 blksread = saved_blksread;
638 tpblksread = saved_tpblksread;
639 goto again;
640 }
641 if (tmpbuf.c_volume != volno) {
642 fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume);
643 volno = 0;
644 haderror = 1;
645 blksread = saved_blksread;
646 tpblksread = saved_tpblksread;
647 goto again;
648 }
649 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
650 fprintf(stderr, "Wrong dump date\n\tgot: %s",
651 #ifdef sunos
652 ctime(&tmpbuf.c_date));
653 #else
654 ctime4(&tmpbuf.c_date));
655 #endif
656 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
657 volno = 0;
658 haderror = 1;
659 blksread = saved_blksread;
660 tpblksread = saved_tpblksread;
661 goto again;
662 }
663 tapesread |= 1 << volno;
664 /*
665 * If continuing from the previous volume, skip over any
666 * blocks read already at the end of the previous volume.
667 *
668 * If coming to this volume at random, skip to the beginning
669 * of the next record.
670 */
671 if (zflag) {
672 fprintf(stderr, "Dump tape is compressed.\n");
673 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB) && !defined(HAVE_LZO)
674 errx(1,"This restore version doesn't support decompression");
675 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
676 }
677 Dprintf(stdout, "read %ld recs, tape starts with %ld\n",
678 tpblksread - 1, (long)tmpbuf.c_firstrec);
679 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
680 if (!wantnext) {
681 tpblksread = tmpbuf.c_firstrec + 1;
682 for (i = tmpbuf.c_count; i > 0; i--)
683 readtape(buf);
684 } else if (tmpbuf.c_firstrec > 0 &&
685 tmpbuf.c_firstrec < tpblksread - 1) {
686 /*
687 * -1 since we've read the volume header
688 */
689 i = tpblksread - tmpbuf.c_firstrec - 1;
690 Dprintf(stderr, "Skipping %ld duplicate record%s.\n",
691 (long)i, i > 1 ? "s" : "");
692 while (--i >= 0)
693 readtape(buf);
694 }
695 }
696 if (curfile.action == USING) {
697 if (volno == 1)
698 panic("active file into volume 1\n");
699 return;
700 }
701 /*
702 * Skip up to the beginning of the next record
703 */
704 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
705 for (i = tmpbuf.c_count; i > 0; i--)
706 readtape(buf);
707 (void) gethead(&spcl);
708 findinode(&spcl);
709 if (gettingfile) {
710 gettingfile = 0;
711 siglongjmp(restart, 1);
712 }
713 }
714
715 /*
716 * Handle unexpected EOF.
717 */
718 static void
719 terminateinput(void)
720 {
721
722 if (gettingfile && curfile.action == USING) {
723 printf("Warning: %s %s\n",
724 "End-of-input encountered while extracting", curfile.name);
725 }
726 curfile.name = "<name unknown>";
727 curfile.action = UNKNOWN;
728 curfile.dip = NULL;
729 curfile.ino = maxino;
730 if (gettingfile) {
731 gettingfile = 0;
732 siglongjmp(restart, 1);
733 }
734 }
735
736 /*
737 * handle multiple dumps per tape by skipping forward to the
738 * appropriate one.
739 */
740 static void
741 setdumpnum(void)
742 {
743 struct mtop tcom;
744
745 if (dumpnum == 1 || volno != 1)
746 return;
747 if (pipein)
748 errx(1, "Cannot have multiple dumps on pipe input");
749 tcom.mt_op = MTFSF;
750 tcom.mt_count = dumpnum - 1;
751 #ifdef RRESTORE
752 if (host) {
753 if (rmtioctl(MTFSF, dumpnum - 1) < 0) {
754 fprintf(stderr, "rmtioctl MTFSF: %s\n", strerror(errno));
755 exit(1);
756 }
757 } else
758 #endif
759 if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0) {
760 fprintf(stderr, "rmtioctl MTFSF: %s\n", strerror(errno));
761 exit(1);
762 /* warn("ioctl MTFSF"); */
763 }
764 }
765
766 void
767 printdumpinfo(void)
768 {
769 #ifdef sunos
770 Vprintf(stdout, "Dump date: %s", ctime(&spcl.c_date));
771 Vprintf(stdout, "Dumped from: %s",
772 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&spcl.c_ddate));
773 if (spcl.c_host[0] == '\0')
774 return;
775 Vprintf(stdout, "Level %d dump of %s on %s:%s\n",
776 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
777 Vprintf(stdout, "Label: %s\n", spcl.c_label);
778 #else
779 fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date));
780 fprintf(stdout, "Dumped from: %s",
781 (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate));
782 if (spcl.c_host[0] == '\0')
783 return;
784 fprintf(stdout, "Level %d dump of %s on %s:%s\n",
785 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
786 fprintf(stdout, "Label: %s\n", spcl.c_label);
787 #endif
788 }
789
790 void
791 printvolinfo(void)
792 {
793 int i;
794
795 if (volinfo[1] == ROOTINO) {
796 printf("Starting inode numbers by volume:\n");
797 for (i = 1; i < (int)TP_NINOS && volinfo[i] != 0; ++i)
798 printf("\tVolume %d: %lu\n", i, (unsigned long)volinfo[i]);
799 }
800 }
801
802
803 int
804 extractfile(struct entry *ep, int doremove)
805 {
806 unsigned int flags;
807 mode_t mode;
808 struct timeval timep[2];
809 char *name = myname(ep);
810
811 /* If removal is requested (-r mode) do remove it unless
812 * we are extracting a metadata only inode */
813 if (spcl.c_flags & DR_METAONLY) {
814 Vprintf(stdout, "file %s is metadata only\n", name);
815 }
816 else {
817 if (doremove) {
818 removeleaf(ep);
819 ep->e_flags &= ~REMOVED;
820 }
821 }
822
823 curfile.name = name;
824 curfile.action = USING;
825 #if defined(__linux__) || defined(sunos)
826 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
827 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
828 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
829 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
830 #else /* __linux__ || sunos */
831 timep[0].tv_sec = curfile.dip->di_atime;
832 timep[0].tv_usec = curfile.dip->di_atimensec / 1000;
833 timep[1].tv_sec = curfile.dip->di_mtime;
834 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000;
835 #endif /* __linux__ */
836 mode = curfile.dip->di_mode;
837 flags = curfile.dip->di_flags;
838 switch (mode & IFMT) {
839
840 default:
841 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
842 skipfile();
843 return (FAIL);
844
845 case IFSOCK:
846 Vprintf(stdout, "skipped socket %s\n", name);
847 skipfile();
848 return (GOOD);
849
850 case IFDIR:
851 {
852 int ret;
853 if (mflag) {
854 if (ep == NULL || ep->e_flags & EXTRACT)
855 panic("unextracted directory %s\n", name);
856 skipfile();
857 return (GOOD);
858 }
859 Vprintf(stdout, "extract dir %s\n", name);
860 ret = genliteraldir(name, curfile.ino);
861 extractattr(name);
862 return ret;
863 }
864
865 case IFLNK:
866 {
867 #ifdef HAVE_LCHOWN
868 uid_t luid = curfile.dip->di_uid;
869 gid_t lgid = curfile.dip->di_gid;
870 #endif
871 if (! (spcl.c_flags & DR_METAONLY)) {
872 lnkbuf[0] = '\0';
873 pathlen = 0;
874 getfile(xtrlnkfile, xtrlnkskip);
875 if (pathlen == 0) {
876 Vprintf(stdout,
877 "%s: zero length symbolic link (ignored)\n", name);
878 return (GOOD);
879 }
880 if (linkit(lnkbuf, name, SYMLINK) == FAIL)
881 return (FAIL);
882 }
883 else
884 skipfile();
885
886 #ifdef HAVE_LCHOWN
887 (void) lchown(name, luid, lgid);
888 #endif
889 extractattr(name);
890 return (GOOD);
891 }
892
893 case IFIFO:
894 {
895 uid_t luid = curfile.dip->di_uid;
896 gid_t lgid = curfile.dip->di_gid;
897
898 Vprintf(stdout, "extract fifo %s\n", name);
899 skipfile();
900 if (Nflag)
901 return (GOOD);
902 if (! (spcl.c_flags & DR_METAONLY)) {
903 if (uflag && !Nflag)
904 (void)unlink(name);
905 if (mkfifo(name, mode) < 0) {
906 warn("%s: cannot create fifo", name);
907 return (FAIL);
908 }
909 }
910 (void) chown(name, luid, lgid);
911 (void) chmod(name, mode);
912 extractattr(name);
913 utimes(name, timep);
914 if (flags)
915 #ifdef __linux__
916 (void) lsetflags(name, flags);
917 #else
918 #ifdef sunos
919 {
920 warn("%s: cannot call chflags", name);
921 /* (void) chflags(name, flags); */
922 }
923 #else
924 (void) chflags(name, flags);
925 #endif
926 #endif
927 return (GOOD);
928 }
929 case IFCHR:
930 case IFBLK:
931 {
932 uid_t luid = curfile.dip->di_uid;
933 gid_t lgid = curfile.dip->di_gid;
934 int lrdev = (int)curfile.dip->di_rdev;
935
936 Vprintf(stdout, "extract special file %s\n", name);
937 skipfile();
938 if (Nflag)
939 return (GOOD);
940 if (! (spcl.c_flags & DR_METAONLY)) {
941 if (uflag)
942 (void)unlink(name);
943 if (mknod(name, mode, lrdev) < 0) {
944 warn("%s: cannot create special file", name);
945 return (FAIL);
946 }
947 }
948 (void) chown(name, luid, lgid);
949 (void) chmod(name, mode);
950 extractattr(name);
951 utimes(name, timep);
952 if (flags)
953 #ifdef __linux__
954 {
955 warn("%s: lsetflags called on a special file", name);
956 (void) lsetflags(name, flags);
957 }
958 #else
959 #ifdef sunos
960 {
961 warn("%s: cannot call chflags on a special file", name);
962 /* (void) chflags(name, flags); */
963 }
964 #else
965 {
966 warn("%s: chflags called on a special file", name);
967 (void) chflags(name, flags);
968 }
969 #endif
970 #endif
971 return (GOOD);
972 }
973 case IFREG:
974 {
975 uid_t luid = curfile.dip->di_uid;
976 gid_t lgid = curfile.dip->di_gid;
977
978 Vprintf(stdout, "extract file %s\n", name);
979 if (Nflag) {
980 skipfile();
981 return (GOOD);
982 }
983 if (! (spcl.c_flags & DR_METAONLY)) {
984 if (uflag)
985 (void)unlink(name);
986 if ((ofile = OPEN(name, O_WRONLY | O_CREAT | O_TRUNC,
987 0666)) < 0) {
988 warn("%s: cannot create file", name);
989 skipfile();
990 return (FAIL);
991 }
992 getfile(xtrfile, xtrskip);
993 (void) close(ofile);
994 }
995 else
996 skipfile();
997 (void) chown(name, luid, lgid);
998 (void) chmod(name, mode);
999 extractattr(name);
1000 utimes(name, timep);
1001 if (flags)
1002 #ifdef __linux__
1003 (void) lsetflags(name, flags);
1004 #else
1005 #ifdef sunos
1006 {
1007 warn("%s: cannot call chflags", name);
1008 /* (void) chflags(name, flags); */
1009 }
1010 #else
1011 (void) chflags(name, flags);
1012 #endif
1013 #endif
1014 return (GOOD);
1015 }
1016 }
1017 /* NOTREACHED */
1018 }
1019
1020 static int
1021 extractattr(char *path)
1022 {
1023 while (spcl.c_flags & DR_EXTATTRIBUTES) {
1024 switch (spcl.c_extattributes) {
1025 case EXT_MACOSFNDRINFO:
1026 #ifdef DUMP_MACOSX
1027 (void)extractfinderinfoufs(path);
1028 #else
1029 msg("MacOSX not supported in this version, skipping\n");
1030 skipfile();
1031 #endif
1032 break;
1033 case EXT_MACOSRESFORK:
1034 #ifdef DUMP_MACOSX
1035 (void)extractresourceufs(path);
1036 #else
1037 msg("MacOSX not supported in this version, skipping\n");
1038 skipfile();
1039 #endif
1040 break;
1041 case EXT_XATTR: {
1042 char xattr[XATTR_MAXSIZE];
1043
1044 if (readxattr(xattr) == GOOD) {
1045 xattr_extract(path, xattr);
1046 break;
1047 }
1048 }
1049 default:
1050 msg("unexpected inode extension %ld, skipping\n", spcl.c_extattributes);
1051 skipfile();
1052 break;
1053 }
1054 }
1055 return GOOD;
1056 }
1057
1058 #ifdef DUMP_MACOSX
1059 int
1060 extractfinderinfoufs(char *name)
1061 {
1062 int err;
1063 char oFileRsrc[MAXPATHLEN];
1064 int flags;
1065 mode_t mode;
1066 struct timeval timep[2];
1067 u_int32_t uid;
1068 u_int32_t gid;
1069 char path[MAXPATHLEN], fname[MAXPATHLEN];
1070
1071 curfile.name = name;
1072 curfile.action = USING;
1073 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
1074 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
1075 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
1076 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
1077 mode = curfile.dip->di_mode;
1078 flags = curfile.dip->di_flags;
1079 uid = curfile.dip->di_uid;
1080 gid = curfile.dip->di_gid;
1081
1082 switch (mode & IFMT) {
1083
1084 default:
1085 fprintf(stderr, "%s: (extr. finfoufs) unknown file mode 0%o\n", name, mode);
1086 skipfile();
1087 return (FAIL);
1088
1089 case IFDIR:
1090 fprintf(stderr, "%s: (extr. finfoufs[IFDIR]) unknown file mode 0%o\n", name, mode);
1091 skipfile();
1092 return (FAIL);
1093
1094 case IFLNK:
1095 skipfile();
1096 return (GOOD);
1097
1098 case IFREG:
1099 Vprintf(stdout, "extract finderinfo file %s\n", name);
1100 if (Nflag) {
1101 skipfile();
1102 return (GOOD);
1103 }
1104 getfile(xtrfilefinderinfo, xtrskip);
1105
1106 GetPathFile(name, path, fname);
1107 strcpy(oFileRsrc, path);
1108 strcat(oFileRsrc, "._");
1109 strcat(oFileRsrc, fname);
1110
1111 if ((err = CreateAppleDoubleFileRes(oFileRsrc, &gFndrInfo.fndrinfo,
1112 mode, flags, timep, uid, gid)) != 0) {
1113 fprintf(stderr, "%s: cannot create finderinfo: %s\n",
1114 name, strerror(errno));
1115 skipfile();
1116 return (FAIL);
1117 }
1118 return (GOOD);
1119 }
1120 /* NOTREACHED */
1121 }
1122
1123
1124 int
1125 extractresourceufs(char *name)
1126 {
1127 char oFileRsrc[MAXPATHLEN];
1128 int flags;
1129 mode_t mode;
1130 struct timeval timep[2];
1131 char path[MAXPATHLEN], fname[MAXPATHLEN];
1132 ASDHeaderPtr hp;
1133 ASDEntryPtr ep;
1134 u_long loff;
1135 u_int32_t uid;
1136 u_int32_t gid;
1137 u_int64_t di_size;
1138 char *p;
1139 char buf[1024];
1140
1141 curfile.name = name;
1142 curfile.action = USING;
1143 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
1144 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
1145 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
1146 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
1147 mode = curfile.dip->di_mode;
1148 flags = curfile.dip->di_flags;
1149 uid = curfile.dip->di_uid;
1150 gid = curfile.dip->di_gid;
1151 di_size = curfile.dip->di_size;
1152
1153 switch (mode & IFMT) {
1154
1155 default:
1156 fprintf(stderr, "%s: (extr. resufs) unknown file mode 0%o\n", name, mode);
1157 skipfile();
1158 return (FAIL);
1159
1160 case IFDIR:
1161 fprintf(stderr, "%s: (extr. resufs [IFDIR]) unknown file mode 0%o\n", name, mode);
1162 skipfile();
1163 return (FAIL);
1164
1165 case IFLNK:
1166 skipfile();
1167 return (GOOD);
1168
1169 case IFREG:
1170 Vprintf(stdout, "extract resource file %s\n", name);
1171 if (Nflag) {
1172 skipfile();
1173 return (GOOD);
1174 }
1175
1176 GetPathFile(name, path, fname);
1177 strcpy(oFileRsrc, path);
1178 strcat(oFileRsrc, "._");
1179 strcat(oFileRsrc, fname);
1180
1181 if ((ofile = open(oFileRsrc, O_RDONLY, 0)) < 0) {
1182 fprintf(stderr, "%s: cannot read finderinfo: %s\n",
1183 name, strerror(errno));
1184 skipfile();
1185 return (FAIL);
1186 }
1187 read(ofile, buf, 70);
1188 (void) close(ofile);
1189 p = buf;
1190 hp = (ASDHeaderPtr)p;
1191 /* the header */
1192 hp->entries++;
1193 p += sizeof(ASDHeader) - CORRECT;
1194 ep = (ASDEntryPtr)p;
1195 /* the finderinfo entry */
1196 ep->offset += sizeof(ASDEntry);
1197 loff = ep->offset;
1198
1199 p += sizeof(ASDEntry);
1200 /* the finderinfo data */
1201 bcopy(p, p + sizeof(ASDEntry), INFOLEN);
1202 ep = (ASDEntryPtr)p;
1203 /* the new resourcefork entry */
1204 ep->entryID = EntryRSRCFork;
1205 ep->offset = loff + INFOLEN;
1206 ep->len = di_size;
1207 /* write the new appledouble entries to the file */
1208 if ((ofile = open(oFileRsrc, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
1209 fprintf(stderr, "%s: cannot create resource file: %s\n",
1210 name, strerror(errno));
1211 skipfile();
1212 return (FAIL);
1213 }
1214 write(ofile, buf, 70 + sizeof(ASDEntry));
1215 /* and add the resource data from tape */
1216 getfile(xtrfile, xtrskip);
1217
1218 (void) fchown(ofile, uid, gid);
1219 (void) fchmod(ofile, mode);
1220 (void) close(ofile);
1221 utimes(oFileRsrc, timep);
1222 (void) lsetflags(oFileRsrc, flags);
1223 return (GOOD);
1224 }
1225 /* NOTREACHED */
1226 }
1227 #endif /* DUMP_MACOSX */
1228
1229 int
1230 readxattr(char *buffer)
1231 {
1232 if (dflag)
1233 msg("reading EA data for inode %lu\n", curfile.ino);
1234
1235 curfile.name = "EA block";
1236 if (curfile.dip->di_size > XATTR_MAXSIZE) {
1237 fprintf(stderr, "EA size too big (%ld)", (long)curfile.dip->di_size);
1238 skipfile();
1239 return (FAIL);
1240 }
1241
1242 memset(xattrbuf, 0, XATTR_MAXSIZE);
1243 xattrlen = 0;
1244
1245 /*
1246 * ugly hack: cope with invalid spcl.c_addr[] records written by
1247 * old versions of dump.
1248 */
1249 readmapflag = 1;
1250
1251 getfile(xtrxattr, xtrnull);
1252
1253 readmapflag = 0;
1254
1255 memcpy(buffer, xattrbuf, XATTR_MAXSIZE);
1256
1257 return (GOOD);
1258 }
1259
1260 /*
1261 * skip over bit maps on the tape
1262 */
1263 void
1264 skipmaps(void)
1265 {
1266
1267 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
1268 skipfile();
1269 }
1270
1271 /*
1272 * skip over a file on the tape
1273 */
1274 void
1275 skipfile(void)
1276 {
1277
1278 curfile.action = SKIP;
1279 getfile(xtrnull, xtrnull);
1280 }
1281
1282 /*
1283 * skip over any extended attributes.
1284 */
1285 void
1286 skipxattr(void)
1287 {
1288
1289 while (spcl.c_flags & DR_EXTATTRIBUTES)
1290 skipfile();
1291 }
1292
1293 /*
1294 * Extract a file from the tape.
1295 * When an allocated block is found it is passed to the fill function;
1296 * when an unallocated block (hole) is found, a zeroed buffer is passed
1297 * to the skip function.
1298 */
1299 void
1300 getfile(void (*fill) __P((char *, size_t)), void (*skip) __P((char *, size_t)))
1301 {
1302 int i;
1303 volatile int curblk = 0;
1304 volatile quad_t size = spcl.c_dinode.di_size;
1305 volatile int last_write_was_hole = 0;
1306 quad_t origsize = size;
1307 static char clearedbuf[MAXBSIZE];
1308 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
1309 char junk[TP_BSIZE];
1310
1311 if (spcl.c_type == TS_END)
1312 panic("ran off end of tape\n");
1313 if (spcl.c_magic != NFS_MAGIC)
1314 panic("not at beginning of a file\n");
1315 if (!gettingfile && setjmp(restart) != 0)
1316 return;
1317 gettingfile++;
1318 loop:
1319 for (i = 0; i < spcl.c_count; i++) {
1320 if (readmapflag || spcl.c_addr[i]) {
1321 readtape(&buf[curblk++][0]);
1322 if (curblk == fssize / TP_BSIZE) {
1323 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
1324 fssize : (curblk - 1) * TP_BSIZE + size));
1325 curblk = 0;
1326 last_write_was_hole = 0;
1327 }
1328 } else {
1329 if (curblk > 0) {
1330 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
1331 curblk * TP_BSIZE :
1332 (curblk - 1) * TP_BSIZE + size));
1333 curblk = 0;
1334 }
1335 (*skip)(clearedbuf, (long)(size > TP_BSIZE ?
1336 TP_BSIZE : size));
1337 last_write_was_hole = 1;
1338 }
1339 if ((size -= TP_BSIZE) <= 0) {
1340 for (i++; i < spcl.c_count; i++)
1341 if (readmapflag || spcl.c_addr[i])
1342 readtape(junk);
1343 break;
1344 }
1345 }
1346 while (gethead(&spcl) != GOOD) {
1347 fprintf(stderr, "Incorrect block for %s at %ld blocks\n",
1348 curfile.name, (long)blksread);
1349 }
1350 if (size > 0) {
1351 if (spcl.c_type == TS_ADDR)
1352 goto loop;
1353 Dprintf(stdout,
1354 "Missing address (header) block for %s at %ld blocks\n",
1355 curfile.name, (long)blksread);
1356 }
1357 if (curblk > 0) {
1358 (*fill)((char *)buf, (size_t)((curblk * TP_BSIZE) + size));
1359 last_write_was_hole = 0;
1360 }
1361 if (size > 0) {
1362 fprintf(stderr, "Missing blocks at the end of %s, assuming hole\n", curfile.name);
1363 while (size > 0) {
1364 size_t skp = size > TP_BSIZE ? TP_BSIZE : size;
1365 (*skip)(clearedbuf, skp);
1366 size -= skp;
1367 }
1368 last_write_was_hole = 1;
1369 }
1370 if (last_write_was_hole) {
1371 FTRUNCATE(ofile, origsize);
1372 }
1373 if (!readingmaps)
1374 findinode(&spcl);
1375 gettingfile = 0;
1376 }
1377
1378 /*
1379 * Write out the next block of a file.
1380 */
1381 static void
1382 xtrfile(char *buf, size_t size)
1383 {
1384
1385 if (Nflag)
1386 return;
1387 if (write(ofile, buf, (int) size) == -1)
1388 err(1, "write error extracting inode %lu, name %s\nwrite",
1389 (unsigned long)curfile.ino, curfile.name);
1390 }
1391
1392 #ifdef DUMP_MACOSX
1393 static void
1394 xtrfilefinderinfo(char *buf, size_t size)
1395 {
1396 bcopy(buf, &gFndrInfo, size);
1397 }
1398 #endif /* DUMP_MACOSX */
1399
1400 /*
1401 * Skip over a hole in a file.
1402 */
1403 /* ARGSUSED */
1404 static void
1405 xtrskip(UNUSED(char *buf), size_t size)
1406 {
1407
1408 if (LSEEK(ofile, (OFF_T)size, SEEK_CUR) == -1)
1409 err(1, "seek error extracting inode %lu, name %s\nlseek",
1410 (unsigned long)curfile.ino, curfile.name);
1411 }
1412
1413 /*
1414 * Collect the next block of a symbolic link.
1415 */
1416 static void
1417 xtrlnkfile(char *buf, size_t size)
1418 {
1419
1420 pathlen += size;
1421 if (pathlen > MAXPATHLEN) {
1422 buf[size - 1] = '\0';
1423 errx(1, "symbolic link name: %s->%s%s; too long %d",
1424 curfile.name, lnkbuf, buf, pathlen);
1425 }
1426 (void) strcat(lnkbuf, buf);
1427 lnkbuf[pathlen] = '\0';
1428 }
1429
1430 /*
1431 * Skip over a hole in a symbolic link (should never happen).
1432 */
1433 /* ARGSUSED */
1434 static void
1435 xtrlnkskip(UNUSED(char *buf), UNUSED(size_t size))
1436 {
1437
1438 errx(1, "unallocated block in symbolic link %s", curfile.name);
1439 }
1440
1441 /*
1442 * Collect the next block of a bit map.
1443 */
1444 static void
1445 xtrmap(char *buf, size_t size)
1446 {
1447
1448 memmove(map, buf, size);
1449 map += size;
1450 }
1451
1452 /*
1453 * Skip over a hole in a bit map (should never happen).
1454 */
1455 /* ARGSUSED */
1456 static void
1457 xtrmapskip(UNUSED(char *buf), size_t size)
1458 {
1459
1460 panic("hole in map\n");
1461 map += size;
1462 }
1463
1464 /*
1465 * Noop, when an extraction function is not needed.
1466 */
1467 /* ARGSUSED */
1468 void
1469 xtrnull(UNUSED(char *buf), UNUSED(size_t size))
1470 {
1471
1472 return;
1473 }
1474
1475 #if COMPARE_ONTHEFLY
1476 /*
1477 * Compare the next block of a file.
1478 */
1479 static void
1480 xtrcmpfile(char *buf, size_t size)
1481 {
1482 static char cmpbuf[MAXBSIZE];
1483
1484 if (cmperror)
1485 return;
1486
1487 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1488 fprintf(stderr, "%s: size has changed.\n",
1489 curfile.name);
1490 cmperror = 1;
1491 return;
1492 }
1493
1494 if (memcmp(buf, cmpbuf, size) != 0) {
1495 fprintf(stderr, "%s: tape and disk copies are different\n",
1496 curfile.name);
1497 cmperror = 1;
1498 return;
1499 }
1500 }
1501
1502 /*
1503 * Skip over a hole in a file.
1504 */
1505 static void
1506 xtrcmpskip(UNUSED(char *buf), size_t size)
1507 {
1508 static char cmpbuf[MAXBSIZE];
1509 int i;
1510
1511 if (cmperror)
1512 return;
1513
1514 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1515 fprintf(stderr, "%s: size has changed.\n",
1516 curfile.name);
1517 cmperror = 1;
1518 return;
1519 }
1520
1521 for (i = 0; i < (int)size; ++i)
1522 if (cmpbuf[i] != '\0') {
1523 fprintf(stderr, "%s: tape and disk copies are different\n",
1524 curfile.name);
1525 cmperror = 1;
1526 return;
1527 }
1528 }
1529 #endif /* COMPARE_ONTHEFLY */
1530
1531 static void
1532 xtrxattr(char *buf, size_t size)
1533 {
1534 if (xattrlen + size > XATTR_MAXSIZE) {
1535 fprintf(stderr, "EA size too big (%ld)", (long)xattrlen + size);
1536 return;
1537 }
1538 memcpy(xattrbuf + xattrlen, buf, size);
1539 xattrlen += size;
1540 }
1541
1542 #if !COMPARE_ONTHEFLY
1543 static int
1544 do_cmpfiles(int fd_tape, int fd_disk, OFF_T size)
1545 {
1546 static char buf_tape[BUFSIZ];
1547 static char buf_disk[BUFSIZ];
1548 ssize_t n_tape;
1549 ssize_t n_disk;
1550
1551 while (size > 0) {
1552 if ((n_tape = read(fd_tape, buf_tape, sizeof(buf_tape))) < 1) {
1553 close(fd_tape), close(fd_disk);
1554 panic("do_cmpfiles: unexpected EOF[1]");
1555 }
1556 if ((n_disk = read(fd_disk, buf_disk, sizeof(buf_tape))) < 1) {
1557 close(fd_tape), close(fd_disk);
1558 panic("do_cmpfiles: unexpected EOF[2]");
1559 }
1560 if (n_tape != n_disk) {
1561 close(fd_tape), close(fd_disk);
1562 panic("do_cmpfiles: sizes different!");
1563 }
1564 if (memcmp(buf_tape, buf_disk, (size_t)n_tape) != 0) return (1);
1565 size -= n_tape;
1566 }
1567 return (0);
1568 }
1569
1570 /* for debugging compare problems */
1571 #undef COMPARE_FAIL_KEEP_FILE
1572
1573 static
1574 #ifdef COMPARE_FAIL_KEEP_FILE
1575 /* return true if tapefile should be unlinked after compare */
1576 int
1577 #else
1578 void
1579 #endif
1580 cmpfiles(char *tapefile, char *diskfile, struct STAT *sbuf_disk)
1581 {
1582 struct STAT sbuf_tape;
1583 int fd_tape, fd_disk;
1584
1585 if (STAT(tapefile, &sbuf_tape) != 0) {
1586 panic("can't lstat tmp file %s: %s\n", tapefile,
1587 strerror(errno));
1588 do_compare_error;
1589 }
1590
1591 if (sbuf_disk->st_size != sbuf_tape.st_size) {
1592 fprintf(stderr,
1593 "%s: size changed from %lld to %lld.\n",
1594 diskfile, (long long)sbuf_tape.st_size, (long long)sbuf_disk->st_size);
1595 do_compare_error;
1596 #ifdef COMPARE_FAIL_KEEP_FILE
1597 return (0);
1598 #else
1599 return;
1600 #endif
1601 }
1602
1603 if ((fd_tape = OPEN(tapefile, O_RDONLY)) < 0) {
1604 panic("can't open %s: %s\n", tapefile, strerror(errno));
1605 do_compare_error;
1606 }
1607 if ((fd_disk = OPEN(diskfile, O_RDONLY)) < 0) {
1608 close(fd_tape);
1609 panic("can't open %s: %s\n", diskfile, strerror(errno));
1610 do_compare_error;
1611 }
1612
1613 if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) {
1614 fprintf(stderr, "%s: tape and disk copies are different\n",
1615 diskfile);
1616 close(fd_tape);
1617 close(fd_disk);
1618 do_compare_error;
1619 #ifdef COMPARE_FAIL_KEEP_FILE
1620 /* rename the file to live in /tmp */
1621 /* rename `tapefile' to /tmp/<basename of diskfile> */
1622 {
1623 char *p = strrchr(diskfile, '/');
1624 char newname[MAXPATHLEN];
1625 if (!p) {
1626 panic("can't find / in %s\n", diskfile);
1627 }
1628 snprintf(newname, sizeof(newname), "%s/debug/%s", tmpdir, p + 1);
1629 if (rename(tapefile, newname)) {
1630 panic("rename from %s to %s failed: %s\n",
1631 tapefile, newname,
1632 strerror(errno));
1633 } else {
1634 fprintf(stderr, "*** %s saved to %s\n",
1635 tapefile, newname);
1636 }
1637 }
1638
1639 /* don't unlink the file (it's not there anymore */
1640 /* anyway) */
1641 return (0);
1642 #else
1643 return;
1644 #endif
1645 }
1646 close(fd_tape);
1647 close(fd_disk);
1648 #ifdef COMPARE_FAIL_KEEP_FILE
1649 return (1);
1650 #endif
1651 }
1652 #endif /* !COMPARE_ONTHEFLY */
1653
1654 static void
1655 compareattr(char *name)
1656 {
1657 int xattr_done = 0;
1658
1659 while (spcl.c_flags & DR_EXTATTRIBUTES) {
1660 switch (spcl.c_extattributes) {
1661 case EXT_MACOSFNDRINFO:
1662 msg("MacOSX not supported for comparision in this version, skipping\n");
1663 skipfile();
1664 break;
1665 case EXT_MACOSRESFORK:
1666 msg("MacOSX not supported for comparision in this version, skipping\n");
1667 skipfile();
1668 break;
1669 case EXT_XATTR: {
1670 char xattr[XATTR_MAXSIZE];
1671
1672 if (readxattr(xattr) == GOOD) {
1673 if (xattr_compare(name, xattr) == FAIL)
1674 do_compare_error;
1675 xattr_done = 1;
1676 }
1677 else
1678 do_compare_error;
1679 break;
1680 }
1681 default:
1682 msg("unexpected inode extension %ld, skipping\n", spcl.c_extattributes);
1683 skipfile();
1684 break;
1685 }
1686 }
1687 if (!xattr_done && xattr_compare(name, NULL) == FAIL)
1688 do_compare_error;
1689 }
1690
1691 #if !COMPARE_ONTHEFLY
1692 static char tmpfilename[MAXPATHLEN];
1693 #endif
1694
1695 void
1696 comparefile(char *name)
1697 {
1698 mode_t mode;
1699 uid_t uid;
1700 uid_t gid;
1701 unsigned int flags;
1702 unsigned long newflags;
1703 struct STAT sb;
1704 int r;
1705 #if !COMPARE_ONTHEFLY
1706 static char *tmpfile = NULL;
1707 struct STAT stemp;
1708 #endif
1709 curfile.name = name;
1710 curfile.action = USING;
1711 mode = curfile.dip->di_mode;
1712 flags = curfile.dip->di_flags;
1713 uid = curfile.dip->di_uid;
1714 gid = curfile.dip->di_gid;
1715
1716 if ((mode & IFMT) == IFSOCK) {
1717 Vprintf(stdout, "skipped socket %s\n", name);
1718 skipfile();
1719 return;
1720 }
1721
1722 if ((r = LSTAT(name, &sb)) != 0) {
1723 warn("unable to stat %s", name);
1724 do_compare_error;
1725 skipfile();
1726 return;
1727 }
1728
1729 Vprintf(stdout, "comparing %s (size: %lld, mode: 0%o)\n", name,
1730 (long long)sb.st_size, mode);
1731
1732 if (sb.st_mode != mode) {
1733 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
1734 name, mode & 07777, sb.st_mode & 07777);
1735 do_compare_error;
1736 }
1737 if (sb.st_uid != uid) {
1738 fprintf(stderr, "%s: uid changed from %d to %d.\n",
1739 name, uid, sb.st_uid);
1740 do_compare_error;
1741 }
1742 if (sb.st_gid != gid) {
1743 fprintf(stderr, "%s: gid changed from %d to %d.\n",
1744 name, gid, sb.st_gid);
1745 do_compare_error;
1746 }
1747 #ifdef __linux__
1748 if (lgetflags(name, &newflags) < 0) {
1749 if (flags != 0) {
1750 warn("%s: lgetflags failed", name);
1751 do_compare_error;
1752 }
1753 }
1754 else {
1755 if (newflags != flags) {
1756 fprintf(stderr, "%s: flags changed from 0x%08x to 0x%08lx.\n",
1757 name, flags, newflags);
1758 do_compare_error;
1759 }
1760 }
1761 #endif
1762 if (spcl.c_flags & DR_METAONLY) {
1763 skipfile();
1764 return;
1765 }
1766 switch (mode & IFMT) {
1767 default:
1768 skipfile();
1769 return;
1770
1771 case IFSOCK:
1772 skipfile();
1773 return;
1774
1775 case IFDIR:
1776 skipfile();
1777 compareattr(name);
1778 return;
1779
1780 case IFLNK: {
1781 char lbuf[MAXPATHLEN + 1];
1782 int lsize;
1783
1784 if (!(sb.st_mode & S_IFLNK)) {
1785 fprintf(stderr, "%s: is no longer a symbolic link\n",
1786 name);
1787 do_compare_error;
1788 return;
1789 }
1790 lnkbuf[0] = '\0';
1791 pathlen = 0;
1792 getfile(xtrlnkfile, xtrlnkskip);
1793 if (pathlen == 0) {
1794 fprintf(stderr,
1795 "%s: zero length symbolic link (ignored)\n",
1796 name);
1797 do_compare_error;
1798 return;
1799 }
1800 if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) {
1801 panic("readlink of %s failed: %s\n", name,
1802 strerror(errno));
1803 do_compare_error;
1804 }
1805 lbuf[lsize] = 0;
1806 if (strcmp(lbuf, lnkbuf) != 0) {
1807 fprintf(stderr,
1808 "%s: symbolic link changed from %s to %s.\n",
1809 name, lnkbuf, lbuf);
1810 do_compare_error;
1811 return;
1812 }
1813 compareattr(name);
1814 return;
1815 }
1816
1817 case IFCHR:
1818 case IFBLK:
1819 if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) {
1820 fprintf(stderr, "%s: no longer a special file\n",
1821 name);
1822 do_compare_error;
1823 skipfile();
1824 return;
1825 }
1826
1827 if (sb.st_rdev != (dev_t)curfile.dip->di_rdev) {
1828 fprintf(stderr,
1829 "%s: device changed from %d,%d to %d,%d.\n",
1830 name,
1831 major(curfile.dip->di_rdev),
1832 minor(curfile.dip->di_rdev),
1833 major(sb.st_rdev),
1834 minor(sb.st_rdev));
1835 do_compare_error;
1836 }
1837 skipfile();
1838 compareattr(name);
1839 return;
1840
1841 case IFREG:
1842 #if COMPARE_ONTHEFLY
1843 if ((ifile = OPEN(name, O_RDONLY)) < 0) {
1844 warn("can't open %s", name);
1845 skipfile();
1846 do_compare_error;
1847 }
1848 else {
1849 cmperror = 0;
1850 getfile(xtrcmpfile, xtrcmpskip);
1851 if (!cmperror) {
1852 char c;
1853 if (read(ifile, &c, 1) != 0) {
1854 fprintf(stderr, "%s: size has changed.\n",
1855 name);
1856 cmperror = 1;
1857 }
1858 }
1859 if (cmperror)
1860 do_compare_error;
1861 close(ifile);
1862 }
1863 #else
1864 if (tmpfile == NULL) {
1865 /* argument to mktemp() must not be in RO space: */
1866 snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir);
1867 tmpfile = mktemp(&tmpfilename[0]);
1868 }
1869 if ((STAT(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) {
1870 panic("cannot delete tmp file %s: %s\n",
1871 tmpfile, strerror(errno));
1872 }
1873 if ((ofile = OPEN(tmpfile, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) {
1874 panic("cannot create file temp file %s: %s\n",
1875 name, strerror(errno));
1876 }
1877 getfile(xtrfile, xtrskip);
1878 (void) close(ofile);
1879 #ifdef COMPARE_FAIL_KEEP_FILE
1880 if (cmpfiles(tmpfile, name, &sb))
1881 unlink(tmpfile);
1882 #else
1883 cmpfiles(tmpfile, name, &sb);
1884 unlink(tmpfile);
1885 #endif
1886 #endif /* COMPARE_ONTHEFLY */
1887 compareattr(name);
1888 return;
1889 }
1890 /* NOTREACHED */
1891 }
1892
1893 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1894 static void (*readtape_func)(char *) = readtape_set;
1895
1896 /*
1897 * Read TP_BSIZE blocks from the input.
1898 * Handle read errors, and end of media.
1899 * Decompress compressed blocks.
1900 */
1901 static void
1902 readtape(char *buf)
1903 {
1904 (*readtape_func)(buf); /* call the actual processing routine */
1905 }
1906
1907 /*
1908 * Set function pointer for readtape() routine. zflag and magtapein must
1909 * be correctly set before the first call to readtape().
1910 */
1911 static void
1912 readtape_set(char *buf)
1913 {
1914 if (!zflag)
1915 readtape_func = readtape_uncompr;
1916 else {
1917 newcomprbuf(ntrec);
1918 if (magtapein)
1919 readtape_func = readtape_comprtape;
1920 else
1921 readtape_func = readtape_comprfile;
1922 }
1923 readtape(buf);
1924 }
1925
1926 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
1927
1928 /*
1929 * This is the original readtape(), it's used for reading uncompressed input.
1930 * Read TP_BSIZE blocks from the input.
1931 * Handle read errors, and end of media.
1932 */
1933 static void
1934 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1935 readtape_uncompr(char *buf)
1936 #else
1937 readtape(char *buf)
1938 #endif
1939 {
1940 ssize_t rd, newvol, i;
1941 int cnt, seek_failed;
1942
1943 if (blkcnt < numtrec) {
1944 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1945 blksread++;
1946 tpblksread++;
1947 return;
1948 }
1949 tbufptr = tapebuf;
1950 for (i = 0; i < ntrec; i++)
1951 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1952 if (numtrec == 0)
1953 numtrec = ntrec;
1954 cnt = ntrec * TP_BSIZE;
1955 rd = 0;
1956 #ifdef USE_QFA
1957 if (createtapeposflag)
1958 (void)GetTapePos(&curtapepos);
1959 #endif
1960 getmore:
1961 #ifdef RRESTORE
1962 if (!Afile && host)
1963 i = rmtread(&tapebuf[rd], cnt);
1964 else
1965 #endif
1966 i = read(mt, &tapebuf[rd], cnt);
1967
1968 /*
1969 * Check for mid-tape short read error.
1970 * If found, skip rest of buffer and start with the next.
1971 */
1972 if (!pipein && numtrec < ntrec && i > 0) {
1973 Dprintf(stdout, "mid-media short read error.\n");
1974 numtrec = ntrec;
1975 }
1976 /*
1977 * Handle partial block read.
1978 */
1979 if (pipein && i == 0 && rd > 0)
1980 i = rd;
1981 else if (i > 0 && i != ntrec * TP_BSIZE) {
1982 if (pipein) {
1983 rd += i;
1984 cnt -= i;
1985 if (cnt > 0)
1986 goto getmore;
1987 i = rd;
1988 } else {
1989 /*
1990 * Short read. Process the blocks read.
1991 */
1992 if (i % TP_BSIZE != 0)
1993 Vprintf(stdout,
1994 "partial block read: %ld should be %ld\n",
1995 (long)i, ntrec * TP_BSIZE);
1996 numtrec = i / TP_BSIZE;
1997 }
1998 }
1999 /*
2000 * Handle read error.
2001 */
2002 if (i < 0) {
2003 fprintf(stderr, "Tape read error while ");
2004 switch (curfile.action) {
2005 default:
2006 fprintf(stderr, "trying to set up tape\n");
2007 break;
2008 case UNKNOWN:
2009 fprintf(stderr, "trying to resynchronize\n");
2010 break;
2011 case USING:
2012 fprintf(stderr, "restoring %s\n", curfile.name);
2013 break;
2014 case SKIP:
2015 fprintf(stderr, "skipping over inode %lu\n",
2016 (unsigned long)curfile.ino);
2017 break;
2018 }
2019 if (!yflag && !reply("continue"))
2020 exit(1);
2021 i = ntrec * TP_BSIZE;
2022 memset(tapebuf, 0, (size_t)i);
2023 #ifdef RRESTORE
2024 if (!Afile && host)
2025 seek_failed = (rmtseek(i, 1) < 0);
2026 else
2027 #endif
2028 seek_failed = (LSEEK(mt, i, SEEK_CUR) == (OFF_T)-1);
2029
2030 if (seek_failed) {
2031 warn("continuation failed");
2032 if (!yflag && !reply("assume end-of-tape and continue"))
2033 exit(1);
2034 i = 0;
2035 }
2036 }
2037 /*
2038 * Handle end of tape.
2039 */
2040 if (i == 0) {
2041 Vprintf(stdout, "End-of-tape encountered\n");
2042 if (!pipein) {
2043 newvol = volno + 1;
2044 volno = 0;
2045 numtrec = 0;
2046 getvol(newvol);
2047 readtape(buf);
2048 return;
2049 }
2050 if (rd % TP_BSIZE != 0)
2051 panic("partial block read: %d should be %d\n",
2052 rd, ntrec * TP_BSIZE);
2053 terminateinput();
2054 memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE);
2055 }
2056 blkcnt = 0;
2057 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2058 blksread++;
2059 tpblksread++;
2060 }
2061
2062 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
2063
2064 /*
2065 * Read a compressed format block from a file or pipe and uncompress it.
2066 * Attempt to handle read errors, and end of file.
2067 */
2068 static void
2069 readtape_comprfile(char *buf)
2070 {
2071 long rl, size, i, ret;
2072 int newvol;
2073 struct tapebuf *tpb;
2074
2075 if (blkcnt < numtrec) {
2076 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2077 blksread++;
2078 tpblksread++;
2079 return;
2080 }
2081 /* need to read the next block */
2082 tbufptr = tapebuf;
2083 for (i = 0; i < ntrec; i++)
2084 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2085 numtrec = ntrec;
2086 tpb = (struct tapebuf *) tapebuf;
2087
2088 /* read the block prefix */
2089 ret = read_a_block(mt, tapebuf, PREFIXSIZE, &rl);
2090 converttapebuf(tpb);
2091
2092 if (Vflag && (ret == 0 || rl < (int)PREFIXSIZE || tpb->length == 0))
2093 ret = 0;
2094 if (ret <= 0)
2095 goto readerr;
2096
2097 /* read the data */
2098 size = tpb->length;
2099 if (size > bufsize) {
2100 /* something's wrong */
2101 Vprintf(stdout, "Prefix size error, max size %d, got %ld\n",
2102 bufsize, size);
2103 size = bufsize;
2104 tpb->length = bufsize;
2105 }
2106 ret = read_a_block(mt, tpb->buf, size, &rl);
2107 if (ret <= 0)
2108 goto readerr;
2109
2110 tbufptr = decompress_tapebuf(tpb, rl + PREFIXSIZE);
2111 if (tbufptr == NULL) {
2112 msg_read_error("File decompression error while");
2113 if (!yflag && !reply("continue"))
2114 exit(1);
2115 memset(tapebuf, 0, bufsize);
2116 tbufptr = tapebuf;
2117 }
2118
2119 blkcnt = 0;
2120 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2121 blksread++;
2122 tpblksread++;
2123 return;
2124
2125 readerr:
2126 /* Errors while reading from a file or pipe are catastrophic. Since
2127 * there are no block boundaries, it's impossible to bypass the
2128 * block in error and find the start of the next block.
2129 */
2130 if (ret == 0) {
2131 /* It's possible to have multiple input files using -M
2132 * and -f file1,file2...
2133 */
2134 Vprintf(stdout, "End-of-File encountered\n");
2135 if (!pipein) {
2136 newvol = volno + 1;
2137 volno = 0;
2138 numtrec = 0;
2139 getvol(newvol);
2140 readtape(buf);
2141 return;
2142 }
2143 }
2144 msg_read_error("Read error while");
2145 /* if (!yflag && !reply("continue")) */
2146 exit(1);
2147 }
2148
2149 /*
2150 * Read compressed data from a tape and uncompress it.
2151 * Handle read errors, and end of media.
2152 * Since a tape consists of separate physical blocks, we try
2153 * to recover from errors by repositioning the tape to the next
2154 * block.
2155 */
2156 static void
2157 readtape_comprtape(char *buf)
2158 {
2159 long rl, size, i;
2160 int ret, newvol;
2161 struct tapebuf *tpb;
2162 struct mtop tcom;
2163
2164 if (blkcnt < numtrec) {
2165 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2166 blksread++;
2167 tpblksread++;
2168 return;
2169 }
2170 /* need to read the next block */
2171 tbufptr = tapebuf;
2172 for (i = 0; i < ntrec; i++)
2173 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2174 numtrec = ntrec;
2175 tpb = (struct tapebuf *) tapebuf;
2176
2177 /* read the block */
2178 size = bufsize + PREFIXSIZE;
2179 ret = read_a_block(mt, tapebuf, size, &rl);
2180 if (ret <= 0)
2181 goto readerr;
2182
2183 converttapebuf(tpb);
2184 tbufptr = decompress_tapebuf(tpb, rl);
2185 if (tbufptr == NULL) {
2186 msg_read_error("Tape decompression error while");
2187 if (!yflag && !reply("continue"))
2188 exit(1);
2189 memset(tapebuf, 0, PREFIXSIZE + bufsize);
2190 tbufptr = tapebuf;
2191 }
2192 goto moverecord;
2193
2194 readerr:
2195 /* Handle errors: EOT switches to the next volume, other errors
2196 * attempt to position the tape to the next block.
2197 */
2198 if (ret == 0) {
2199 Vprintf(stdout, "End-of-tape encountered\n");
2200 newvol = volno + 1;
2201 volno = 0;
2202 numtrec = 0;
2203 getvol(newvol);
2204 readtape(buf);
2205 return;
2206 }
2207
2208 msg_read_error("Tape read error while");
2209 if (!yflag && !reply("continue"))
2210 exit(1);
2211 memset(tapebuf, 0, PREFIXSIZE + bufsize);
2212 tbufptr = tapebuf;
2213
2214 #ifdef RRESTORE
2215 if (host)
2216 rl = rmtioctl(MTFSR, 1);
2217 else
2218 #endif
2219 {
2220 tcom.mt_op = MTFSR;
2221 tcom.mt_count = 1;
2222 rl = ioctl(mt, MTIOCTOP, &tcom);
2223 }
2224
2225 if (rl < 0) {
2226 warn("continuation failed");
2227 if (!yflag && !reply("assume end-of-tape and continue"))
2228 exit(1);
2229 ret = 0; /* end of tape */
2230 goto readerr;
2231 }
2232
2233 moverecord:
2234 blkcnt = 0;
2235 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2236 blksread++;
2237 tpblksread++;
2238 }
2239
2240 /*
2241 * Decompress a struct tapebuf into a buffer. readsize is the size read
2242 * from the tape/file and is used for error messages. Returns a pointer
2243 * to the location of the uncompressed buffer or NULL on errors.
2244 * Adjust numtrec and complain for a short block.
2245 */
2246 static char *
2247 decompress_tapebuf(struct tapebuf *tpbin, int readsize)
2248 {
2249 /* If zflag is on, all blocks have a struct tapebuf prefix */
2250 /* zflag gets set in setup() from the dump header */
2251 int cresult, blocklen;
2252 unsigned long worklen;
2253 char *output = NULL,*reason = NULL, *lengtherr = NULL;
2254
2255 /* build a length error message */
2256 blocklen = tpbin->length;
2257 if (readsize < blocklen + (int)PREFIXSIZE)
2258 lengtherr = "short";
2259 else
2260 if (readsize > blocklen + (int)PREFIXSIZE)
2261 lengtherr = "long";
2262
2263 worklen = comprlen;
2264 cresult = 1;
2265 if (tpbin->compressed) {
2266 /* uncompress whatever we read, if it fails, complain later */
2267 if (tpbin->flags == COMPRESS_ZLIB) {
2268 #ifndef HAVE_ZLIB
2269 errx(1,"This restore version doesn't support zlib decompression");
2270 #else
2271 cresult = uncompress(comprbuf, &worklen,
2272 tpbin->buf, blocklen);
2273 output = comprbuf;
2274 switch (cresult) {
2275 case Z_OK:
2276 break;
2277 case Z_MEM_ERROR:
2278 reason = "not enough memory";
2279 break;
2280 case Z_BUF_ERROR:
2281 reason = "buffer too small";
2282 break;
2283 case Z_DATA_ERROR:
2284 reason = "data error";
2285 break;
2286 default:
2287 reason = "unknown";
2288 }
2289 if (cresult == Z_OK)
2290 cresult = 1;
2291 else
2292 cresult = 0;
2293 #endif /* HAVE_ZLIB */
2294 }
2295 if (tpbin->flags == COMPRESS_BZLIB) {
2296 #ifndef HAVE_BZLIB
2297 errx(1,"This restore version doesn't support bzlib decompression");
2298 #else
2299 unsigned int worklen2 = worklen;
2300 cresult = BZ2_bzBuffToBuffDecompress(
2301 comprbuf, &worklen2,
2302 tpbin->buf, blocklen, 0, 0);
2303 worklen = worklen2;
2304 output = comprbuf;
2305 switch (cresult) {
2306 case BZ_OK:
2307 break;
2308 case BZ_MEM_ERROR:
2309 reason = "not enough memory";
2310 break;
2311 case BZ_OUTBUFF_FULL:
2312 reason = "buffer too small";
2313 break;
2314 case BZ_DATA_ERROR:
2315 case BZ_DATA_ERROR_MAGIC:
2316 case BZ_UNEXPECTED_EOF:
2317 reason = "data error";
2318 break;
2319 default:
2320 reason = "unknown";
2321 }
2322 if (cresult == BZ_OK)
2323 cresult = 1;
2324 else
2325 cresult = 0;
2326 #endif /* HAVE_BZLIB */
2327 }
2328 if (tpbin->flags == COMPRESS_LZO) {
2329 #ifndef HAVE_LZO
2330 errx(1,"This restore version doesn't support lzo decompression");
2331 #else
2332 lzo_uint worklen2 = worklen;
2333 cresult = lzo1x_decompress(tpbin->buf, blocklen,
2334 comprbuf, &worklen2, NULL);
2335 worklen = worklen2;
2336 output = comprbuf;
2337 switch (cresult) {
2338 case LZO_E_OK:
2339 break;
2340 case LZO_E_ERROR:
2341 case LZO_E_EOF_NOT_FOUND:
2342 reason = "data error";
2343 break;
2344 default:
2345 reason = "unknown";
2346 }
2347 if (cresult == LZO_E_OK)
2348 cresult = 1;
2349 else
2350 cresult = 0;
2351 #endif /* HAVE_LZO */
2352 }
2353 }
2354 else {
2355 output = tpbin->buf;
2356 worklen = blocklen;
2357 }
2358 if (cresult) {
2359 numtrec = worklen / TP_BSIZE;
2360 if (worklen % TP_BSIZE != 0)
2361 reason = "length mismatch";
2362 }
2363 if (reason) {
2364 if (lengtherr)
2365 fprintf(stderr, "%s compressed block: %d expected: %u\n",
2366 lengtherr, readsize, tpbin->length + PREFIXSIZE);
2367 fprintf(stderr, "decompression error, block %ld: %s\n",
2368 tpblksread+1, reason);
2369 if (!cresult)
2370 output = NULL;
2371 }
2372 return output;
2373 }
2374
2375 /*
2376 * Print an error message for a read error.
2377 * This was exteracted from the original readtape().
2378 */
2379 static void
2380 msg_read_error(char *m)
2381 {
2382 switch (curfile.action) {
2383 default:
2384 fprintf(stderr, "%s trying to set up tape\n", m);
2385 break;
2386 case UNKNOWN:
2387 fprintf(stderr, "%s trying to resynchronize\n", m);
2388 break;
2389 case USING:
2390 fprintf(stderr, "%s restoring %s\n", m, curfile.name);
2391 break;
2392 case SKIP:
2393 fprintf(stderr, "%s skipping over inode %lu\n", m,
2394 (unsigned long)curfile.ino);
2395 break;
2396 }
2397 }
2398 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
2399
2400 /*
2401 * Read the first block and get the blocksize from it. Test
2402 * for a compressed dump tape/file. setup() will make the final
2403 * determination by checking the compressed flag if gethead()
2404 * finds a valid header. The test here is necessary to offset the buffer
2405 * by the size of the compressed prefix. zflag is set here so that
2406 * readtape_set can set the correct function pointer for readtape().
2407 * Note that the first block of each tape/file is not compressed
2408 * and does not have a prefix.
2409 */
2410 static void
2411 findtapeblksize(void)
2412 {
2413 long i;
2414 size_t len;
2415 struct tapebuf *tpb = (struct tapebuf *) tapebuf;
2416 struct s_spcl spclpt;
2417
2418 for (i = 0; i < ntrec; i++)
2419 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2420 blkcnt = 0;
2421 tbufptr = tapebuf;
2422 /*
2423 * For a pipe or file, read in the first record. For a tape, read
2424 * the first block.
2425 */
2426 len = magtapein ? ntrec * TP_BSIZE : TP_BSIZE;
2427
2428 if (read_a_block(mt, tapebuf, len, &i) <= 0)
2429 errx(1, "Tape read error on first record");
2430
2431 memcpy(&spclpt, tapebuf, TP_BSIZE);
2432 cvtflag = 0;
2433 if (converthead(&spclpt) == FAIL) {
2434 cvtflag++;
2435 if (converthead(&spclpt) == FAIL) {
2436 /* Special case for old compressed tapes with prefix */
2437 if (magtapein && (i % TP_BSIZE != 0))
2438 goto oldformat;
2439 errx(1, "Tape is not a dump tape");
2440 }
2441 fprintf(stderr, "Converting to new file system format.\n");
2442 }
2443 /*
2444 * If the input is from a file or a pipe, we read TP_BSIZE
2445 * bytes looking for a dump header. If the dump is compressed
2446 * we need to read in the rest of the block, as determined
2447 * by c_ntrec in the dump header. The first block of the
2448 * dump is not compressed and does not have a prefix.
2449 */
2450 if (!magtapein) {
2451 if (spclpt.c_type == TS_TAPE
2452 && spclpt.c_flags & DR_COMPRESSED) {
2453 /* It's a compressed dump file, read in the */
2454 /* rest of the block based on spclpt.c_ntrec. */
2455 if (spclpt.c_ntrec > ntrec)
2456 errx(1, "Tape blocksize is too large, use "
2457 "\'-b %d\' ", spclpt.c_ntrec);
2458 ntrec = spclpt.c_ntrec;
2459 len = (ntrec - 1) * TP_BSIZE;
2460 zflag = 1;
2461 }
2462 else {
2463 /* read in the rest of the block based on bufsize */
2464 len = bufsize - TP_BSIZE;
2465 }
2466 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) < 0
2467 || (i != (long)len && i % TP_BSIZE != 0))
2468 errx(1,"Error reading dump file header");
2469 tbufptr = tapebuf;
2470 numtrec = ntrec;
2471 Vprintf(stdout, "Input block size is %ld\n", ntrec);
2472 return;
2473 } /* if (!magtapein) */
2474
2475 /*
2476 * If the input is a tape, we tried to read ntrec * TP_BSIZE bytes.
2477 * If the value of ntrec is too large, we read less than
2478 * what we asked for; adjust the value of ntrec and test for
2479 * a compressed dump tape.
2480 */
2481 if (i % TP_BSIZE != 0) {
2482 oldformat:
2483 /* may be old format compressed dump tape with a prefix */
2484 memcpy(&spclpt, tpb->buf, TP_BSIZE);
2485 cvtflag = 0;
2486 if (converthead(&spclpt) == FAIL) {
2487 cvtflag++;
2488 if (converthead(&spclpt) == FAIL)
2489 errx(1, "Tape is not a dump tape");
2490 fprintf(stderr, "Converting to new file system format.\n");
2491 }
2492 if (i % TP_BSIZE == PREFIXSIZE
2493 && tpb->compressed == 0
2494 && spclpt.c_type == TS_TAPE
2495 && spclpt.c_flags & DR_COMPRESSED) {
2496 zflag = 1;
2497 tbufptr = tpb->buf;
2498 if (tpb->length > bufsize)
2499 errx(1, "Tape blocksize is too large, use "
2500 "\'-b %d\' ", tpb->length / TP_BSIZE);
2501 }
2502 else
2503 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
2504 i, TP_BSIZE);
2505 }
2506 ntrec = i / TP_BSIZE;
2507 if (spclpt.c_type == TS_TAPE) {
2508 if (spclpt.c_flags & DR_COMPRESSED)
2509 zflag = 1;
2510 if (spclpt.c_ntrec > ntrec)
2511 errx(1, "Tape blocksize is too large, use "
2512 "\'-b %d\' ", spclpt.c_ntrec);
2513 }
2514 numtrec = ntrec;
2515 Vprintf(stdout, "Tape block size is %ld\n", ntrec);
2516 }
2517
2518 /*
2519 * Read a block of data handling all of the messy details.
2520 */
2521 static int read_a_block(int fd, char *buf, size_t len, long *lengthread)
2522 {
2523 long i = 1, size;
2524
2525 size = len;
2526 while (size > 0) {
2527 #ifdef RRESTORE
2528 if (!Afile && host)
2529 i = rmtread(buf, size);
2530 else
2531 #endif
2532 i = read(fd, buf, size);
2533
2534 if (i <= 0)
2535 break; /* EOD or error */
2536 size -= i;
2537 if (magtapein)
2538 break; /* block at a time for mt */
2539 buf += i;
2540 }
2541 *lengthread = len - size;
2542 return i;
2543 }
2544
2545 void
2546 closemt(void)
2547 {
2548
2549 if (mt < 0)
2550 return;
2551 #ifdef RRESTORE
2552 if (!Afile && host)
2553 rmtclose();
2554 else
2555 #endif
2556 (void) close(mt);
2557 }
2558
2559 static void
2560 setmagtapein(void) {
2561 struct mtget mt_stat;
2562 static int done = 0;
2563 if (done)
2564 return;
2565 done = 1;
2566 if (!pipein) {
2567 /* need to know if input is really from a tape */
2568 #ifdef RRESTORE
2569 if (host)
2570 magtapein = !lflag;
2571 else
2572 #endif
2573 magtapein = ioctl(mt, MTIOCGET, (char *)&mt_stat) == 0;
2574 }
2575
2576 Vprintf(stdout,"Input is from a %s %s\n",
2577 host ? "remote" : "local",
2578 magtapein ? "tape" :
2579 Vflag ? "multi-volume (no tape)" : "file/pipe");
2580 }
2581
2582 /*
2583 * Read the next block from the tape.
2584 * Check to see if it is one of several vintage headers.
2585 * If it is an old style header, convert it to a new style header.
2586 * If it is not any valid header, return an error.
2587 */
2588 static int
2589 gethead(struct s_spcl *buf)
2590 {
2591 readtape((char *)buf);
2592 return converthead(buf);
2593 }
2594
2595 static int
2596 converthead(struct s_spcl *buf)
2597 {
2598 int32_t i;
2599 union {
2600 quad_t qval;
2601 int32_t val[2];
2602 } qcvt;
2603 union u_ospcl {
2604 char dummy[TP_BSIZE];
2605 struct s_ospcl {
2606 int32_t c_type;
2607 int32_t c_date;
2608 int32_t c_ddate;
2609 int32_t c_volume;
2610 int32_t c_tapea;
2611 u_int16_t c_inumber;
2612 int32_t c_magic;
2613 int32_t c_checksum;
2614 struct odinode {
2615 u_int16_t odi_mode;
2616 u_int16_t odi_nlink;
2617 u_int16_t odi_uid;
2618 u_int16_t odi_gid;
2619 int32_t odi_size;
2620 int32_t odi_rdev;
2621 char odi_addr[36];
2622 int32_t odi_atime;
2623 int32_t odi_mtime;
2624 int32_t odi_ctime;
2625 } c_dinode;
2626 int32_t c_count;
2627 char c_fill[256];
2628 } s_ospcl;
2629 } u_ospcl;
2630
2631 if (!cvtflag) {
2632 if (buf->c_magic != NFS_MAGIC) {
2633 if (swabi(buf->c_magic) != NFS_MAGIC)
2634 return (FAIL);
2635 if (!Bcvt) {
2636 Vprintf(stdout, "Note: Doing Byte swapping\n");
2637 Bcvt = 1;
2638 }
2639 }
2640 if (checksum((int *)buf) == FAIL)
2641 return (FAIL);
2642 if (Bcvt)
2643 swabst((u_char *)"8i4s1l29i528bi192b4i", (u_char *)buf);
2644 goto good;
2645 }
2646 memcpy(&u_ospcl.s_ospcl, buf, TP_BSIZE);
2647 if (checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
2648 return(FAIL);
2649 if (u_ospcl.s_ospcl.c_magic == OFS_MAGIC) {
2650 memset((char *)buf, 0, (long)TP_BSIZE);
2651 buf->c_type = u_ospcl.s_ospcl.c_type;
2652 buf->c_date = u_ospcl.s_ospcl.c_date;
2653 buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
2654 buf->c_volume = u_ospcl.s_ospcl.c_volume;
2655 buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
2656 buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
2657 buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
2658 buf->c_magic = u_ospcl.s_ospcl.c_magic;
2659 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
2660 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
2661 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
2662 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
2663 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
2664 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
2665 #if defined(__linux__) || defined(sunos)
2666 buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime;
2667 buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2668 buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2669 #else /* __linux__ || sunos */
2670 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
2671 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2672 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2673 #endif /* __linux__ || sunos */
2674 buf->c_count = u_ospcl.s_ospcl.c_count;
2675 memmove(buf->c_addr, u_ospcl.s_ospcl.c_fill, (long)256);
2676 }
2677 else if (u_ospcl.s_ospcl.c_magic == FS_UFS2_MAGIC) {
2678 buf->c_date = (int32_t)(*(int64_t *)&u_ospcl.dummy[896]);
2679 buf->c_ddate = (int32_t)(*(int64_t *)&u_ospcl.dummy[904]);
2680 buf->c_tapea = (int32_t)(*(int64_t *)&u_ospcl.dummy[912]);
2681 buf->c_firstrec = (int32_t)(*(int64_t *)&u_ospcl.dummy[920]);
2682 buf->c_ntrec = 0;
2683 buf->c_extattributes = 0;
2684 buf->c_flags |= DR_NEWINODEFMT;
2685 ufs2flag = 1;
2686 }
2687 else
2688 return(FAIL);
2689 buf->c_magic = NFS_MAGIC;
2690
2691 good:
2692 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
2693 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
2694 qcvt.qval = buf->c_dinode.di_size;
2695 if (qcvt.val[0] || qcvt.val[1]) {
2696 Vprintf(stdout, "Note: Doing Quad swapping\n");
2697 Qcvt = 1;
2698 }
2699 }
2700 if (Qcvt) {
2701 qcvt.qval = buf->c_dinode.di_size;
2702 i = qcvt.val[1];
2703 qcvt.val[1] = qcvt.val[0];
2704 qcvt.val[0] = i;
2705 buf->c_dinode.di_size = qcvt.qval;
2706 }
2707 readmapflag = 0;
2708
2709 switch (buf->c_type) {
2710
2711 case TS_CLRI:
2712 case TS_BITS:
2713 /*
2714 * Have to patch up missing information in bit map headers
2715 */
2716 buf->c_inumber = 0;
2717 buf->c_dinode.di_size = buf->c_count * TP_BSIZE;
2718 if (buf->c_count > TP_NINDIR)
2719 readmapflag = 1;
2720 else
2721 for (i = 0; i < buf->c_count; i++)
2722 buf->c_addr[i]++;
2723 break;
2724
2725 case TS_TAPE:
2726 if ((buf->c_flags & DR_NEWINODEFMT) == 0)
2727 oldinofmt = 1;
2728 /* fall through */
2729 case TS_END:
2730 buf->c_inumber = 0;
2731 if (buf->c_flags & DR_INODEINFO) {
2732 memcpy(volinfo, buf->c_inos, TP_NINOS * sizeof(dump_ino_t));
2733 if (Bcvt)
2734 swabst((u_char *)"128i", (u_char *)volinfo);
2735 }
2736 break;
2737
2738 case TS_INODE:
2739 case TS_ADDR:
2740 break;
2741
2742 default:
2743 panic("gethead: unknown inode type %d\n", buf->c_type);
2744 break;
2745 }
2746 /*
2747 * If we are restoring a filesystem with old format inodes,
2748 * copy the uid/gid to the new location.
2749 */
2750 if (oldinofmt) {
2751 buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
2752 buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
2753 }
2754 if (dflag)
2755 accthdr(buf);
2756 return(GOOD);
2757 }
2758
2759 static void
2760 converttapebuf(struct tapebuf *tpb)
2761 {
2762 if (Bcvt) {
2763 struct tb {
2764 unsigned int length:28;
2765 unsigned int flags:3;
2766 unsigned int compressed:1;
2767 } tb;
2768 swabst((u_char *)"i", (u_char *)tpb);
2769 memcpy(&tb, tpb, 4);
2770 tpb->length = tb.length;
2771 tpb->flags = tb.flags;
2772 tpb->compressed = tb.compressed;
2773 }
2774 }
2775
2776 /*
2777 * Check that a header is where it belongs and predict the next header
2778 */
2779 static void
2780 accthdr(struct s_spcl *header)
2781 {
2782 static dump_ino_t previno = 0x7fffffff;
2783 static int prevtype;
2784 static long predict;
2785 long blks, i;
2786
2787 if (header->c_type == TS_TAPE) {
2788 fprintf(stderr, "Volume header (%s inode format) ",
2789 oldinofmt ? "old" : "new");
2790 if (header->c_firstrec)
2791 fprintf(stderr, "begins with record %d",
2792 header->c_firstrec);
2793 fprintf(stderr, "\n");
2794 previno = 0x7fffffff;
2795 return;
2796 }
2797 if (previno == 0x7fffffff)
2798 goto newcalc;
2799 switch (prevtype) {
2800 case TS_BITS:
2801 fprintf(stderr, "Dumped inodes map header");
2802 break;
2803 case TS_CLRI:
2804 fprintf(stderr, "Used inodes map header");
2805 break;
2806 case TS_INODE:
2807 fprintf(stderr, "File header, ino %lu", (unsigned long)previno);
2808 break;
2809 case TS_ADDR:
2810 fprintf(stderr, "File continuation header, ino %ld", (long)previno);
2811 break;
2812 case TS_END:
2813 fprintf(stderr, "End of tape header");
2814 break;
2815 }
2816 if (predict != blksread - 1)
2817 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
2818 predict, blksread - 1);
2819 fprintf(stderr, "\n");
2820 newcalc:
2821 blks = 0;
2822 if (header->c_type != TS_END)
2823 for (i = 0; i < header->c_count; i++)
2824 if (readmapflag || header->c_addr[i] != 0)
2825 blks++;
2826 predict = blks;
2827 blksread = 0;
2828 prevtype = header->c_type;
2829 previno = header->c_inumber;
2830 }
2831
2832 /*
2833 * Find an inode header.
2834 * Complain if had to skip, and complain is set.
2835 */
2836 static void
2837 findinode(struct s_spcl *header)
2838 {
2839 static long skipcnt = 0;
2840 long i;
2841 char buf[TP_BSIZE];
2842
2843 curfile.name = "<name unknown>";
2844 curfile.action = UNKNOWN;
2845 curfile.dip = NULL;
2846 curfile.ino = 0;
2847 do {
2848 if (header->c_magic != NFS_MAGIC) {
2849 skipcnt++;
2850 while (gethead(header) == FAIL ||
2851 header->c_date != dumpdate)
2852 skipcnt++;
2853 }
2854 switch (header->c_type) {
2855
2856 case TS_ADDR:
2857 /*
2858 * Skip up to the beginning of the next record
2859 */
2860 for (i = 0; i < header->c_count; i++)
2861 if (header->c_addr[i])
2862 readtape(buf);
2863 while (gethead(header) == FAIL ||
2864 header->c_date != dumpdate)
2865 skipcnt++;
2866 break;
2867
2868 case TS_INODE:
2869 curfile.dip = &header->c_dinode;
2870 curfile.ino = header->c_inumber;
2871 break;
2872
2873 case TS_END:
2874 curfile.ino = maxino;
2875 break;
2876
2877 case TS_CLRI:
2878 curfile.name = "<file removal list>";
2879 break;
2880
2881 case TS_BITS:
2882 curfile.name = "<file dump list>";
2883 break;
2884
2885 case TS_TAPE:
2886 panic("unexpected tape header\n");
2887 /* NOTREACHED */
2888
2889 default:
2890 panic("unknown tape header type %d\n", spcl.c_type);
2891 /* NOTREACHED */
2892
2893 }
2894 } while (header->c_type == TS_ADDR);
2895 if (skipcnt > 0)
2896 #ifdef USE_QFA
2897 if (!noresyncmesg)
2898 #endif
2899 fprintf(stderr, "resync restore, skipped %ld blocks\n",
2900 skipcnt);
2901 skipcnt = 0;
2902 }
2903
2904 static int
2905 checksum(int *buf)
2906 {
2907 int i, j;
2908
2909 j = sizeof(union u_spcl) / sizeof(int);
2910 i = 0;
2911 if(!Bcvt) {
2912 do
2913 i += *buf++;
2914 while (--j);
2915 } else {
2916 /* What happens if we want to read restore tapes
2917 for a 16bit int machine??? */
2918 do
2919 i += swabi(*buf++);
2920 while (--j);
2921 }
2922
2923 if (i != CHECKSUM) {
2924 fprintf(stderr, "Checksum error %o, inode %lu file %s\n", i,
2925 (unsigned long)curfile.ino, curfile.name);
2926 return(FAIL);
2927 }
2928 return(GOOD);
2929 }
2930
2931 #ifdef RRESTORE
2932 #ifdef __STDC__
2933 #include <stdarg.h>
2934 #else
2935 #include <varargs.h>
2936 #endif
2937
2938 void
2939 #ifdef __STDC__
2940 msg(const char *fmt, ...)
2941 #else
2942 msg(fmt, va_alist)
2943 char *fmt;
2944 va_dcl
2945 #endif
2946 {
2947 va_list ap;
2948 #ifdef __STDC__
2949 va_start(ap, fmt);
2950 #else
2951 va_start(ap);
2952 #endif
2953 (void)vfprintf(stderr, fmt, ap);
2954 va_end(ap);
2955 }
2956 #endif /* RRESTORE */
2957
2958 static u_char *
2959 swab16(u_char *sp, int n)
2960 {
2961 char c;
2962
2963 while (--n >= 0) {
2964 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
2965 sp += 2;
2966 }
2967 return (sp);
2968 }
2969
2970 static u_char *
2971 swab32(u_char *sp, int n)
2972 {
2973 char c;
2974
2975 while (--n >= 0) {
2976 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
2977 c = sp[1]; sp[1] = sp[2]; sp[2] = c;
2978 sp += 4;
2979 }
2980 return (sp);
2981 }
2982
2983 static u_char *
2984 swab64(u_char *sp, int n)
2985 {
2986 char c;
2987
2988 while (--n >= 0) {
2989 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
2990 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
2991 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
2992 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
2993 sp += 8;
2994 }
2995 return (sp);
2996 }
2997
2998 void
2999 swabst(u_char *cp, u_char *sp)
3000 {
3001 int n = 0;
3002
3003 while (*cp) {
3004 switch (*cp) {
3005 case '0': case '1': case '2': case '3': case '4':
3006 case '5': case '6': case '7': case '8': case '9':
3007 n = (n * 10) + (*cp++ - '0');
3008 continue;
3009
3010 case 's': case 'w': case 'h':
3011 if (n == 0)
3012 n = 1;
3013 sp = swab16(sp, n);
3014 break;
3015
3016 case 'i':
3017 if (n == 0)
3018 n = 1;
3019 sp = swab32(sp, n);
3020 break;
3021
3022 case 'l':
3023 if (n == 0)
3024 n = 1;
3025 sp = swab64(sp, n);
3026 break;
3027
3028 default: /* Any other character, like 'b' counts as byte. */
3029 if (n == 0)
3030 n = 1;
3031 sp += n;
3032 break;
3033 }
3034 cp++;
3035 n = 0;
3036 }
3037 }
3038
3039 static u_int
3040 swabi(u_int x)
3041 {
3042 swabst((u_char *)"i", (u_char *)&x);
3043 return (x);
3044 }
3045
3046 #if 0
3047 static u_long
3048 swabl(u_long x)
3049 {
3050 swabst((u_char *)"l", (u_char *)&x);
3051 return (x);
3052 }
3053 #endif
3054
3055 void
3056 RequestVol(long tnum)
3057 {
3058 FLUSHTAPEBUF();
3059 getvol(tnum);
3060 }
3061
3062 #ifdef USE_QFA
3063 #ifdef sunos
3064 extern int fdsmtc;
3065
3066 struct uscsi_cmd {
3067 int uscsi_flags; /* read, write, etc. see below */
3068 short uscsi_status; /* resulting status */
3069 short uscsi_timeout; /* Command Timeout */
3070 caddr_t uscsi_cdb; /* cdb to send to target */
3071 caddr_t uscsi_bufaddr; /* i/o source/destination */
3072 u_int uscsi_buflen; /* size of i/o to take place */
3073 u_int uscsi_resid; /* resid from i/o operation */
3074 u_char uscsi_cdblen; /* # of valid cdb bytes */
3075 u_char uscsi_rqlen; /* size of uscsi_rqbuf */
3076 u_char uscsi_rqstatus; /* status of request sense cmd */
3077 u_char uscsi_rqresid; /* resid of request sense cmd */
3078 caddr_t uscsi_rqbuf; /* request sense buffer */
3079 void *uscsi_reserved_5; /* Reserved for Future Use */
3080 };
3081
3082 #define CDB_GROUP0 6 /* 6-byte cdb's */
3083 #define CDB_GROUP1 10 /* 10-byte cdb's */
3084 #define CDB_GROUP2 10 /* 10-byte cdb's */
3085 #define CDB_GROUP3 0 /* reserved */
3086 #define CDB_GROUP4 16 /* 16-byte cdb's */
3087 #define CDB_GROUP5 12 /* 12-byte cdb's */
3088 #define CDB_GROUP6 0 /* reserved */
3089 #define CDB_GROUP7 0 /* reserved */
3090
3091 #define USCSI_WRITE 0x00000 /* send data to device */
3092 #define USCSI_SILENT 0x00001 /* no error messages */
3093 #define USCSI_DIAGNOSE 0x00002 /* fail if any error occurs */
3094 #define USCSI_ISOLATE 0x00004 /* isolate from normal commands */
3095 #define USCSI_READ 0x00008 /* get data from device */
3096 #define USCSI_RESET 0x04000 /* Reset target */
3097 #define USCSI_RESET_ALL 0x08000 /* Reset all targets */
3098 #define USCSI_RQENABLE 0x10000 /* Enable Request Sense extensions */
3099
3100 #define USCSIIOC (0x04 << 8)
3101 #define USCSICMD (USCSIIOC|201) /* user scsi command */
3102
3103 #define USCSI_TIMEOUT 30
3104 #define USCSI_SHORT_TIMEOUT 900
3105 #define USCSI_LONG_TIMEOUT 14000
3106
3107 #define B(s,i) ((unsigned char)((s) >> i))
3108 #define B1(s) ((unsigned char)(s))
3109
3110 #define MSB4(s,v) *(s)=B(v,24),(s)[1]=B(v,16), (s)[2]=B(v,8), (s)[3]=B1(v)
3111
3112
3113 int
3114 GetTapePos(long long *pos)
3115 {
3116 int err = 0;
3117 struct uscsi_cmd scmd;
3118 char buf[512];
3119 char parm[512 * 8];
3120 long lpos;
3121
3122 (void)memset((void *)buf, 0, sizeof(buf));
3123 (void)memset((void *)&scmd, 0, sizeof(scmd));
3124 scmd.uscsi_flags = USCSI_READ|USCSI_SILENT;
3125 scmd.uscsi_timeout = USCSI_TIMEOUT;
3126 scmd.uscsi_cdb = buf;
3127 scmd.uscsi_cdblen = CDB_GROUP1;
3128 buf[0] = 0x34; /* read position */
3129 buf[1] = 0;
3130 (void)memset((void *)parm, 0, 512);
3131 scmd.uscsi_bufaddr = parm;
3132 scmd.uscsi_buflen = 56;
3133 if (ioctl(fdsmtc, USCSICMD, &scmd) == -1) {
3134 err = errno;
3135 return err;
3136 }
3137 (void)memcpy(&lpos, &parm[4], sizeof(long));
3138 *pos = lpos;
3139 return err;
3140 }
3141
3142 int
3143 GotoTapePos(long long pos)
3144 {
3145 int err = 0;
3146 struct uscsi_cmd scmd;
3147 char buf[512];
3148 char parm[512 * 8];
3149 long lpos = (long)pos;
3150
3151 (void)memset((void *)buf, 0, sizeof(buf));
3152 (void)memset((void *)&scmd, 0, sizeof(scmd));
3153 scmd.uscsi_flags = USCSI_WRITE|USCSI_SILENT;
3154 scmd.uscsi_timeout = 360; /* 5 Minutes */
3155 scmd.uscsi_cdb = buf;
3156 scmd.uscsi_cdblen = CDB_GROUP1;
3157 buf[0] = 0x2b; /* locate */
3158 buf[1] = 0;
3159 MSB4(&buf[3], lpos);
3160 (void)memset((void *)parm, 0, 512);
3161 scmd.uscsi_bufaddr = NULL;
3162 scmd.uscsi_buflen = 0;
3163 if (ioctl(fdsmtc, USCSICMD, &scmd) == -1) {
3164 err = errno;
3165 return err;
3166 }
3167 return err;
3168 }
3169 #endif
3170
3171 #define LSEEK_GET_TAPEPOS 10
3172 #define LSEEK_GO2_TAPEPOS 11
3173
3174 #ifdef __linux__
3175 typedef struct mt_pos {
3176 short mt_op;
3177 int mt_count;
3178 } MTPosRec, *MTPosPtr;
3179
3180
3181 /*
3182 * get the current position of the tape
3183 */
3184 int
3185 GetTapePos(long long *pos)
3186 {
3187 int err = 0;
3188
3189 #ifdef RDUMP
3190 if (host) {
3191 *pos = (long long) rmtseek((OFF_T)0, (int)LSEEK_GET_TAPEPOS);
3192 err = *pos < 0;
3193 }
3194 else
3195 #endif
3196 {
3197 if (magtapein) {
3198 long mtpos;
3199 *pos = 0;
3200 err = (ioctl(mt, MTIOCPOS, &mtpos) < 0);
3201 *pos = (long long)mtpos;
3202 }
3203 else {
3204 *pos = LSEEK(mt, 0, SEEK_CUR);
3205 err = (*pos < 0);
3206 }
3207 }
3208 if (err) {
3209 err = errno;
3210 fprintf(stdout, "[%ld] error: %d (getting tapepos: %lld)\n",
3211 (unsigned long)getpid(), err, *pos);
3212 return err;
3213 }
3214 return err;
3215 }
3216
3217 /*
3218 * go to specified position on tape
3219 */
3220 int
3221 GotoTapePos(long long pos)
3222 {
3223 int err = 0;
3224
3225 #ifdef RDUMP
3226 if (host)
3227 err = (rmtseek((OFF_T)pos, (int)LSEEK_GO2_TAPEPOS) < 0);
3228 else
3229 #endif
3230 {
3231 if (magtapein) {
3232 struct mt_pos buf;
3233 buf.mt_op = MTSEEK;
3234 buf.mt_count = (int) pos;
3235 err = (ioctl(mt, MTIOCTOP, &buf) < 0);
3236 }
3237 else {
3238 pos = LSEEK(mt, pos, SEEK_SET);
3239 err = (pos < 0);
3240 }
3241 }
3242 if (err) {
3243 err = errno;
3244 fprintf(stdout, "[%ld] error: %d (setting tapepos: %lld)\n",
3245 (unsigned long)getpid(), err, pos);
3246 return err;
3247 }
3248 return err;
3249 }
3250 #endif /* __linux__ */
3251
3252 /*
3253 * read next data from tape to re-sync
3254 */
3255 void
3256 ReReadFromTape(void)
3257 {
3258 FLUSHTAPEBUF();
3259 noresyncmesg = 1;
3260 if (gethead(&spcl) == FAIL) {
3261 #ifdef DEBUG_QFA
3262 fprintf(stdout, "DEBUG 1 gethead failed\n");
3263 #endif
3264 }
3265 findinode(&spcl);
3266 noresyncmesg = 0;
3267 }
3268
3269 void
3270 ReReadInodeFromTape(dump_ino_t theino)
3271 {
3272 long cntloop = 0;
3273
3274 FLUSHTAPEBUF();
3275 noresyncmesg = 1;
3276 do {
3277 cntloop++;
3278 gethead(&spcl);
3279 } while (!(spcl.c_inumber == theino && spcl.c_type == TS_INODE && spcl.c_date == dumpdate));
3280 #ifdef DEBUG_QFA
3281 fprintf(stderr, "DEBUG: %ld reads\n", cntloop);
3282 fprintf(stderr, "DEBUG: bufsize %ld\n", bufsize);
3283 fprintf(stderr, "DEBUG: ntrec %ld\n", ntrec);
3284 fprintf(stderr, "DEBUG: %ld reads\n", cntloop);
3285 #endif
3286 findinode(&spcl);
3287 noresyncmesg = 0;
3288 }
3289
3290 #ifdef sunos
3291 int
3292 OpenSMTCmt(char *themagtape)
3293 {
3294 if (GetSCSIIDFromPath(themagtape, &scsiid)) {
3295 fprintf(stderr, "can't get SCSI-ID for %s\n", themagtape);
3296 return -1;
3297 }
3298 if (scsiid < 0) {
3299 fprintf(stderr, "can't get SCSI-ID for %s\n", themagtape);
3300 return -1;
3301 }
3302 sprintf(smtcpath, "/dev/rsmtc%ld,0", scsiid);
3303 if ((fdsmtc = open(smtcpath, O_RDWR)) == -1) {
3304 fprintf(stderr, "can't open smtc device: %s, %d\n", smtcpath, errno);
3305 return -1;
3306 }
3307 return 0;
3308 }
3309 #endif /* sunos */
3310 #endif /* USE_QFA */
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