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Updated buggy example.
[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 1.84 2004/12/15 11:00:01 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 setmagtapein __P((void));
171 static int extractattr __P((char *));
172 static void compareattr __P((char *));
173
174 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
175 static void newcomprbuf __P((int));
176 static void (*readtape_func) __P((char *));
177 static void readtape_set __P((char *));
178 static void readtape_uncompr __P((char *));
179 static void readtape_comprfile __P((char *));
180 static void readtape_comprtape __P((char *));
181 static char *decompress_tapebuf __P((struct tapebuf *, int));
182 static void msg_read_error __P((char *));
183 #endif
184 static int read_a_block __P((int, char *, size_t, long *));
185 #define PREFIXSIZE sizeof(struct tapebuf)
186
187 #define COMPARE_ONTHEFLY 1
188
189 #if COMPARE_ONTHEFLY
190 static int ifile; /* input file for compare */
191 static int cmperror; /* compare error */
192 static void xtrcmpfile __P((char *, size_t));
193 static void xtrcmpskip __P((char *, size_t));
194 #endif
195
196 static int readmapflag;
197 static int readingmaps; /* set to 1 while reading the maps */
198
199 #ifdef DUMP_MACOSX
200 static DumpFinderInfo gFndrInfo;
201 #endif
202
203 /*
204 * Set up an input source. This is called from main.c before setup() is.
205 */
206 void
207 setinput(char *source)
208 {
209 int i;
210 char *n;
211
212 FLUSHTAPEBUF();
213 if (bflag)
214 newtapebuf(ntrec);
215 else
216 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
217 terminal = stdin;
218
219 #ifdef RRESTORE
220 if ((n = strchr(source, ':'))) {
221 for (i = 0; i < (n - source); i++) {
222 if (source[i] == '/')
223 break;
224 }
225 if (source[i] != '/') {
226 host = source;
227 source = strchr(host, ':');
228 *source++ = '\0';
229 if (rmthost(host) == 0)
230 exit(1);
231 }
232 } else
233 #endif
234 if (strcmp(source, "-") == 0) {
235 /*
236 * Since input is coming from a pipe we must establish
237 * our own connection to the terminal.
238 */
239 terminal = fopen(_PATH_TTY, "r");
240 if (terminal == NULL) {
241 warn("cannot open %s", _PATH_TTY);
242 terminal = fopen(_PATH_DEVNULL, "r");
243 if (terminal == NULL)
244 err(1, "cannot open %s", _PATH_DEVNULL);
245 }
246 pipein++;
247 }
248 setuid(getuid()); /* no longer need or want root privileges */
249 if (Mflag) {
250 strncpy(magtapeprefix, source, MAXPATHLEN);
251 magtapeprefix[MAXPATHLEN-1] = '\0';
252 snprintf(magtape, MAXPATHLEN, "%s%03d", source, 1);
253 }
254 else
255 strncpy(magtape, source, MAXPATHLEN);
256 magtape[MAXPATHLEN - 1] = '\0';
257 }
258
259 void
260 newtapebuf(long size)
261 {
262 static int tapebufsize = -1;
263
264 ntrec = size;
265 bufsize = ntrec * TP_BSIZE;
266 if (size <= tapebufsize)
267 return;
268 if (tapebuf != NULL)
269 free(tapebuf);
270 tapebuf = malloc(size * TP_BSIZE + sizeof(struct tapebuf));
271 if (tapebuf == NULL)
272 errx(1, "Cannot allocate space for tape buffer");
273 tapebufsize = size;
274 }
275
276 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
277 static void
278 newcomprbuf(int size)
279 {
280 size_t buf_size = (size+1) * TP_BSIZE + sizeof(struct tapebuf);
281 if (buf_size <= comprlen)
282 return;
283 comprlen = buf_size;
284 if (comprbuf != NULL)
285 free(comprbuf);
286 comprbuf = malloc(comprlen);
287 if (comprbuf == NULL)
288 errx(1, "Cannot allocate space for decompress buffer");
289 }
290 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
291
292 /*
293 * Verify that the tape drive can be accessed and
294 * that it actually is a dump tape.
295 */
296 void
297 setup(void)
298 {
299 int i, j, *ip, bot_code;
300 struct STAT stbuf;
301 char *temptape;
302
303 Vprintf(stdout, "Verify tape and initialize maps\n");
304 if (Afile == NULL && bot_script) {
305 msg("Launching %s\n", bot_script);
306 bot_code = system_command(bot_script, magtape, 1);
307 if (bot_code != 0 && bot_code != 1) {
308 msg("Restore aborted by the beginning of tape script\n");
309 exit(1);
310 }
311 }
312
313 if (Afile)
314 temptape = Afile;
315 else
316 temptape = magtape;
317
318 #ifdef RRESTORE
319 if (!Afile && host)
320 mt = rmtopen(temptape, O_RDONLY);
321 else
322 #endif
323 if (pipein)
324 mt = 0;
325 else
326 mt = OPEN(temptape, O_RDONLY, 0);
327 if (mt < 0)
328 err(1, "%s", temptape);
329 if (!Afile) {
330 volno = 1;
331 setmagtapein();
332 setdumpnum();
333 }
334 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
335 readtape_func = readtape_set;
336 #if defined(HAVE_LZO)
337 if (lzo_init() != LZO_E_OK) {
338 msg("internal error - lzo_init failed \n");
339 exit(1);
340 }
341 #endif
342 #endif
343 FLUSHTAPEBUF();
344 findtapeblksize();
345 if (gethead(&spcl) == FAIL) {
346 blkcnt--; /* push back this block */
347 blksread--;
348 tpblksread--;
349 cvtflag++;
350 if (gethead(&spcl) == FAIL)
351 errx(1, "Tape is not a dump tape");
352 fprintf(stderr, "Converting to new file system format.\n");
353 }
354
355 if (zflag) {
356 fprintf(stderr, "Dump tape is compressed.\n");
357 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB) && !defined(HAVE_LZO)
358 errx(1,"This restore version doesn't support decompression");
359 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
360 }
361 if (pipein) {
362 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC;
363 endoftapemark.s_spcl.c_type = TS_END;
364 ip = (int *)&endoftapemark;
365 j = sizeof(union u_spcl) / sizeof(int);
366 i = 0;
367 do
368 i += *ip++;
369 while (--j);
370 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
371 }
372 if (vflag || command == 't' || command == 'C')
373 printdumpinfo();
374 #ifdef USE_QFA
375 if (tapeposflag && (unsigned long)spcl.c_date != qfadumpdate)
376 errx(1, "different QFA/dumpdates detected\n");
377 #endif
378 if (filesys[0] == '\0') {
379 char *dirptr;
380 strncpy(filesys, spcl.c_filesys, NAMELEN);
381 filesys[NAMELEN - 1] = '\0';
382 dirptr = strstr(filesys, " (dir");
383 if (dirptr != NULL)
384 *dirptr = '\0';
385 }
386 dumptime = spcl.c_ddate;
387 dumpdate = spcl.c_date;
388 if (STAT(".", &stbuf) < 0)
389 err(1, "cannot stat .");
390 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
391 fssize = TP_BSIZE;
392 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
393 fssize = stbuf.st_blksize;
394 if (((fssize - 1) & fssize) != 0)
395 errx(1, "bad block size %ld", fssize);
396 if (spcl.c_volume != 1)
397 errx(1, "Tape is not volume 1 of the dump");
398 if (gethead(&spcl) == FAIL) {
399 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
400 panic("no header after volume mark!\n");
401 }
402 readingmaps = 1;
403 findinode(&spcl);
404 if (spcl.c_type != TS_CLRI)
405 errx(1, "Cannot find file removal list");
406 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
407 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
408 if (map == NULL)
409 errx(1, "no memory for active inode map");
410 usedinomap = map;
411 curfile.action = USING;
412 getfile(xtrmap, xtrmapskip);
413 while (spcl.c_type == TS_ADDR) {
414 /* Recompute maxino and the map */
415 dump_ino_t oldmaxino = maxino;
416 maxino += (spcl.c_count * TP_BSIZE * NBBY) + 1;
417 resizemaps(oldmaxino, maxino);
418 map = usedinomap;
419
420 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
421 getfile(xtrmap, xtrmapskip);
422 }
423 Dprintf(stdout, "maxino = %lu\n", (unsigned long)maxino);
424 if (spcl.c_type != TS_BITS) {
425 if (spcl.c_type == TS_END) {
426 msg("Cannot find file dump list, assuming empty tape\n");
427 exit(0);
428 }
429 errx(1, "Cannot find file dump list");
430 }
431 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
432 if (map == (char *)NULL)
433 errx(1, "no memory for file dump list");
434 dumpmap = map;
435 curfile.action = USING;
436 getfile(xtrmap, xtrmapskip);
437 while (spcl.c_type == TS_ADDR) {
438 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
439 getfile(xtrmap, xtrmapskip);
440 }
441 /*
442 * If there may be whiteout entries on the tape, pretend that the
443 * whiteout inode exists, so that the whiteout entries can be
444 * extracted.
445 */
446 if (oldinofmt == 0)
447 SETINO(WINO, dumpmap);
448 readingmaps = 0;
449 findinode(&spcl);
450 }
451
452 /*
453 * Prompt user to load a new dump volume.
454 * "Nextvol" is the next suggested volume to use.
455 * This suggested volume is enforced when doing full
456 * or incremental restores, but can be overridden by
457 * the user when only extracting a subset of the files.
458 */
459 void
460 getvol(long nextvol)
461 {
462 long newvol = 0, wantnext = 0, i;
463 long saved_blksread = 0, saved_tpblksread = 0;
464 union u_spcl tmpspcl;
465 # define tmpbuf tmpspcl.s_spcl
466 char buf[TP_BSIZE];
467 int haderror = 0, bot_code = 1;
468
469 if (nextvol == 1) {
470 tapesread = 0;
471 gettingfile = 0;
472 tpblksread = 0;
473 blksread = 0;
474 }
475 if (pipein) {
476 if (nextvol != 1)
477 panic("Changing volumes on pipe input?\n");
478 if (volno == 1)
479 return;
480 goto gethdr;
481 }
482 saved_blksread = blksread;
483 saved_tpblksread = tpblksread;
484 #if defined(USE_QFA) && defined(sunos)
485 if (createtapeposflag || tapeposflag)
486 close(fdsmtc);
487 #endif
488 again:
489 if (pipein)
490 exit(1); /* pipes do not get a second chance */
491 if (aflag || curfile.action != SKIP) {
492 newvol = nextvol;
493 wantnext = 1;
494 } else {
495 newvol = 0;
496 wantnext = 0;
497 }
498 while (newvol <= 0) {
499 if (tapesread == 0) {
500 fprintf(stderr, "%s%s%s%s%s",
501 "You have not read any volumes yet.\n",
502 "Unless you know which volume your",
503 " file(s) are on you should start\n",
504 "with the last volume and work",
505 " towards the first.\n");
506 } else {
507 fprintf(stderr, "You have read volumes");
508 strcpy(buf, ": ");
509 for (i = 1; i < 32; i++)
510 if (tapesread & (1 << i)) {
511 fprintf(stderr, "%s%ld", buf, (long)i);
512 strcpy(buf, ", ");
513 }
514 fprintf(stderr, "\n");
515 }
516 do {
517 fprintf(stderr, "Specify next volume # (none if no more volumes): ");
518 (void) fflush(stderr);
519 (void) fgets(buf, TP_BSIZE, terminal);
520 } while (!feof(terminal) && buf[0] == '\n');
521 if (feof(terminal))
522 exit(1);
523 if (!strcmp(buf, "none\n")) {
524 terminateinput();
525 return;
526 }
527 newvol = atoi(buf);
528 if (newvol <= 0) {
529 fprintf(stderr,
530 "Volume numbers are positive numerics\n");
531 }
532 }
533 if (newvol == volno) {
534 tapesread |= 1 << volno;
535 #if defined(USE_QFA) && defined(sunos)
536 if (createtapeposflag || tapeposflag) {
537 if (OpenSMTCmt(magtape) < 0) {
538 volno = -1;
539 haderror = 1;
540 goto again;
541 }
542 }
543 #endif /* USE_QFA */
544 return;
545 }
546 closemt();
547
548 /*
549 * if using an archive file, reset its name so readtape()
550 * could properly use remote access.
551 */
552 Afile = NULL;
553
554 if (Mflag) {
555 snprintf(magtape, MAXPATHLEN, "%s%03ld", magtapeprefix, newvol);
556 magtape[MAXPATHLEN - 1] = '\0';
557 }
558 if (bot_script && !haderror) {
559 msg("Launching %s\n", bot_script);
560 bot_code = system_command(bot_script, magtape, newvol);
561 if (bot_code != 0 && bot_code != 1) {
562 msg("Restore aborted by the beginning of tape script\n");
563 exit(1);
564 }
565 }
566 if (haderror || (bot_code && !Mflag)) {
567 haderror = 0;
568 #ifdef sunos
569 fprintf(stderr, "Mount volume %ld\n", (long)newvol);
570 #else
571 fprintf(stderr, "Mount tape volume %ld\n", (long)newvol);
572 #endif
573 fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
574 #ifdef sunos
575 fprintf(stderr, "then enter volume name (default: %s) ", magtape);
576 #else
577 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
578 #endif
579 (void) fflush(stderr);
580 (void) fgets(buf, TP_BSIZE, terminal);
581 if (feof(terminal))
582 exit(1);
583 if (!strcmp(buf, "none\n")) {
584 terminateinput();
585 return;
586 }
587 if (buf[0] != '\n') {
588 char *pos;
589 (void) strncpy(magtape, buf, sizeof(magtape));
590 magtape[sizeof(magtape) - 1] = '\0';
591 if ((pos = strchr(magtape, '\n')))
592 magtape[pos - magtape] = '\0';
593 }
594 }
595 #if defined(USE_QFA) && defined(sunos)
596 if (createtapeposflag || tapeposflag) {
597 if (OpenSMTCmt(magtape) < 0) {
598 volno = -1;
599 haderror = 1;
600 goto again;
601 }
602 }
603 #endif /* USE_QFA */
604 #ifdef RRESTORE
605 if (host)
606 mt = rmtopen(magtape, O_RDONLY);
607 else
608 #endif
609 mt = OPEN(magtape, O_RDONLY, 0);
610
611 if (mt == -1) {
612 fprintf(stderr, "Cannot open %s\n", magtape);
613 volno = -1;
614 haderror = 1;
615 goto again;
616 }
617 gethdr:
618 setmagtapein();
619 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
620 readtape_func = readtape_set;
621 #endif
622 volno = newvol;
623 setdumpnum();
624 FLUSHTAPEBUF();
625 findtapeblksize();
626 if (gethead(&tmpbuf) == FAIL) {
627 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
628 fprintf(stderr, "tape is not dump tape\n");
629 volno = 0;
630 haderror = 1;
631 blksread = saved_blksread;
632 tpblksread = saved_tpblksread;
633 goto again;
634 }
635 if (tmpbuf.c_volume != volno) {
636 fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume);
637 volno = 0;
638 haderror = 1;
639 blksread = saved_blksread;
640 tpblksread = saved_tpblksread;
641 goto again;
642 }
643 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
644 fprintf(stderr, "Wrong dump date\n\tgot: %s",
645 #ifdef sunos
646 ctime(&tmpbuf.c_date));
647 #else
648 ctime4(&tmpbuf.c_date));
649 #endif
650 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
651 volno = 0;
652 haderror = 1;
653 blksread = saved_blksread;
654 tpblksread = saved_tpblksread;
655 goto again;
656 }
657 tapesread |= 1 << volno;
658 /*
659 * If continuing from the previous volume, skip over any
660 * blocks read already at the end of the previous volume.
661 *
662 * If coming to this volume at random, skip to the beginning
663 * of the next record.
664 */
665 if (zflag) {
666 fprintf(stderr, "Dump tape is compressed.\n");
667 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB) && !defined(HAVE_LZO)
668 errx(1,"This restore version doesn't support decompression");
669 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
670 }
671 Dprintf(stdout, "read %ld recs, tape starts with %ld\n",
672 tpblksread - 1, (long)tmpbuf.c_firstrec);
673 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
674 if (!wantnext) {
675 tpblksread = tmpbuf.c_firstrec + 1;
676 for (i = tmpbuf.c_count; i > 0; i--)
677 readtape(buf);
678 } else if (tmpbuf.c_firstrec > 0 &&
679 tmpbuf.c_firstrec < tpblksread - 1) {
680 /*
681 * -1 since we've read the volume header
682 */
683 i = tpblksread - tmpbuf.c_firstrec - 1;
684 Dprintf(stderr, "Skipping %ld duplicate record%s.\n",
685 (long)i, i > 1 ? "s" : "");
686 while (--i >= 0)
687 readtape(buf);
688 }
689 }
690 if (curfile.action == USING) {
691 if (volno == 1)
692 panic("active file into volume 1\n");
693 return;
694 }
695 /*
696 * Skip up to the beginning of the next record
697 */
698 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
699 for (i = tmpbuf.c_count; i > 0; i--)
700 readtape(buf);
701 (void) gethead(&spcl);
702 findinode(&spcl);
703 if (gettingfile) {
704 gettingfile = 0;
705 siglongjmp(restart, 1);
706 }
707 }
708
709 /*
710 * Handle unexpected EOF.
711 */
712 static void
713 terminateinput(void)
714 {
715
716 if (gettingfile && curfile.action == USING) {
717 printf("Warning: %s %s\n",
718 "End-of-input encountered while extracting", curfile.name);
719 }
720 curfile.name = "<name unknown>";
721 curfile.action = UNKNOWN;
722 curfile.dip = NULL;
723 curfile.ino = maxino;
724 if (gettingfile) {
725 gettingfile = 0;
726 siglongjmp(restart, 1);
727 }
728 }
729
730 /*
731 * handle multiple dumps per tape by skipping forward to the
732 * appropriate one.
733 */
734 static void
735 setdumpnum(void)
736 {
737 struct mtop tcom;
738
739 if (dumpnum == 1 || volno != 1)
740 return;
741 if (pipein)
742 errx(1, "Cannot have multiple dumps on pipe input");
743 tcom.mt_op = MTFSF;
744 tcom.mt_count = dumpnum - 1;
745 #ifdef RRESTORE
746 if (host) {
747 if (rmtioctl(MTFSF, dumpnum - 1) < 0) {
748 fprintf(stderr, "rmtioctl MTFSF: %s\n", strerror(errno));
749 exit(1);
750 }
751 } else
752 #endif
753 if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0) {
754 fprintf(stderr, "rmtioctl MTFSF: %s\n", strerror(errno));
755 exit(1);
756 /* warn("ioctl MTFSF"); */
757 }
758 }
759
760 void
761 printdumpinfo(void)
762 {
763 #ifdef sunos
764 Vprintf(stdout, "Dump date: %s", ctime(&spcl.c_date));
765 Vprintf(stdout, "Dumped from: %s",
766 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&spcl.c_ddate));
767 if (spcl.c_host[0] == '\0')
768 return;
769 Vprintf(stdout, "Level %d dump of %s on %s:%s\n",
770 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
771 Vprintf(stdout, "Label: %s\n", spcl.c_label);
772 #else
773 fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date));
774 fprintf(stdout, "Dumped from: %s",
775 (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate));
776 if (spcl.c_host[0] == '\0')
777 return;
778 fprintf(stdout, "Level %d dump of %s on %s:%s\n",
779 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
780 fprintf(stdout, "Label: %s\n", spcl.c_label);
781 #endif
782 }
783
784 void
785 printvolinfo(void)
786 {
787 int i;
788
789 if (volinfo[1] == ROOTINO) {
790 printf("Starting inode numbers by volume:\n");
791 for (i = 1; i < (int)TP_NINOS && volinfo[i] != 0; ++i)
792 printf("\tVolume %d: %lu\n", i, (unsigned long)volinfo[i]);
793 }
794 }
795
796
797 int
798 extractfile(struct entry *ep, int doremove)
799 {
800 unsigned int flags;
801 mode_t mode;
802 struct timeval timep[2];
803 char *name = myname(ep);
804
805 /* If removal is requested (-r mode) do remove it unless
806 * we are extracting a metadata only inode */
807 if (spcl.c_flags & DR_METAONLY) {
808 Vprintf(stdout, "file %s is metadata only\n", name);
809 }
810 else {
811 if (doremove) {
812 removeleaf(ep);
813 ep->e_flags &= ~REMOVED;
814 }
815 }
816
817 curfile.name = name;
818 curfile.action = USING;
819 #if defined(__linux__) || defined(sunos)
820 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
821 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
822 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
823 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
824 #else /* __linux__ || sunos */
825 timep[0].tv_sec = curfile.dip->di_atime;
826 timep[0].tv_usec = curfile.dip->di_atimensec / 1000;
827 timep[1].tv_sec = curfile.dip->di_mtime;
828 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000;
829 #endif /* __linux__ */
830 mode = curfile.dip->di_mode;
831 flags = curfile.dip->di_flags;
832 switch (mode & IFMT) {
833
834 default:
835 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
836 skipfile();
837 return (FAIL);
838
839 case IFSOCK:
840 Vprintf(stdout, "skipped socket %s\n", name);
841 skipfile();
842 return (GOOD);
843
844 case IFDIR:
845 {
846 int ret;
847 if (mflag) {
848 if (ep == NULL || ep->e_flags & EXTRACT)
849 panic("unextracted directory %s\n", name);
850 skipfile();
851 return (GOOD);
852 }
853 Vprintf(stdout, "extract dir %s\n", name);
854 ret = genliteraldir(name, curfile.ino);
855 extractattr(name);
856 return ret;
857 }
858
859 case IFLNK:
860 {
861 #ifdef HAVE_LCHOWN
862 uid_t luid = curfile.dip->di_uid;
863 gid_t lgid = curfile.dip->di_gid;
864 #endif
865 if (! (spcl.c_flags & DR_METAONLY)) {
866 lnkbuf[0] = '\0';
867 pathlen = 0;
868 getfile(xtrlnkfile, xtrlnkskip);
869 if (pathlen == 0) {
870 Vprintf(stdout,
871 "%s: zero length symbolic link (ignored)\n", name);
872 return (GOOD);
873 }
874 if (linkit(lnkbuf, name, SYMLINK) == FAIL)
875 return (FAIL);
876 }
877 else
878 skipfile();
879
880 #ifdef HAVE_LCHOWN
881 (void) lchown(name, luid, lgid);
882 #endif
883 extractattr(name);
884 return (GOOD);
885 }
886
887 case IFIFO:
888 Vprintf(stdout, "extract fifo %s\n", name);
889 if (Nflag) {
890 skipfile();
891 return (GOOD);
892 }
893 if (! (spcl.c_flags & DR_METAONLY)) {
894 if (uflag && !Nflag)
895 (void)unlink(name);
896 if (mkfifo(name, mode) < 0) {
897 warn("%s: cannot create fifo", name);
898 skipfile();
899 return (FAIL);
900 }
901 }
902 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
903 (void) chmod(name, mode);
904 if (flags)
905 #ifdef __linux__
906 (void) lsetflags(name, flags);
907 #else
908 #ifdef sunos
909 {
910 warn("%s: cannot call chflags", name);
911 /* (void) chflags(name, flags); */
912 }
913 #else
914 (void) chflags(name, flags);
915 #endif
916 #endif
917 skipfile();
918 extractattr(name);
919 utimes(name, timep);
920 return (GOOD);
921
922 case IFCHR:
923 case IFBLK:
924 Vprintf(stdout, "extract special file %s\n", name);
925 if (Nflag) {
926 skipfile();
927 return (GOOD);
928 }
929 if (! (spcl.c_flags & DR_METAONLY)) {
930 if (uflag)
931 (void)unlink(name);
932 if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) {
933 warn("%s: cannot create special file", name);
934 skipfile();
935 return (FAIL);
936 }
937 }
938 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
939 (void) chmod(name, mode);
940 if (flags)
941 #ifdef __linux__
942 {
943 warn("%s: lsetflags called on a special file", name);
944 (void) lsetflags(name, flags);
945 }
946 #else
947 #ifdef sunos
948 {
949 warn("%s: cannot call chflags on a special file", name);
950 /* (void) chflags(name, flags); */
951 }
952 #else
953 {
954 warn("%s: chflags called on a special file", name);
955 (void) chflags(name, flags);
956 }
957 #endif
958 #endif
959 skipfile();
960 extractattr(name);
961 utimes(name, timep);
962 return (GOOD);
963
964 case IFREG:
965 {
966 uid_t luid = curfile.dip->di_uid;
967 gid_t lgid = curfile.dip->di_gid;
968
969 Vprintf(stdout, "extract file %s\n", name);
970 if (Nflag) {
971 skipfile();
972 return (GOOD);
973 }
974 if (! (spcl.c_flags & DR_METAONLY)) {
975 if (uflag)
976 (void)unlink(name);
977 if ((ofile = OPEN(name, O_WRONLY | O_CREAT | O_TRUNC,
978 0666)) < 0) {
979 warn("%s: cannot create file", name);
980 skipfile();
981 return (FAIL);
982 }
983 getfile(xtrfile, xtrskip);
984 (void) close(ofile);
985 }
986 else
987 skipfile();
988 (void) chown(name, luid, lgid);
989 (void) chmod(name, mode);
990 if (flags)
991 #ifdef __linux__
992 (void) lsetflags(name, flags);
993 #else
994 #ifdef sunos
995 {
996 warn("%s: cannot call chflags", name);
997 /* (void) chflags(name, flags); */
998 }
999 #else
1000 (void) chflags(name, flags);
1001 #endif
1002 #endif
1003 extractattr(name);
1004 utimes(name, timep);
1005 return (GOOD);
1006 }
1007 }
1008 /* NOTREACHED */
1009 }
1010
1011 static int
1012 extractattr(char *path)
1013 {
1014 while (spcl.c_flags & DR_EXTATTRIBUTES) {
1015 switch (spcl.c_extattributes) {
1016 case EXT_MACOSFNDRINFO:
1017 #ifdef DUMP_MACOSX
1018 (void)extractfinderinfoufs(path);
1019 #else
1020 msg("MacOSX not supported in this version, skipping\n");
1021 skipfile();
1022 #endif
1023 break;
1024 case EXT_MACOSRESFORK:
1025 #ifdef DUMP_MACOSX
1026 (void)extractresourceufs(path);
1027 #else
1028 msg("MacOSX not supported in this version, skipping\n");
1029 skipfile();
1030 #endif
1031 break;
1032 case EXT_XATTR:
1033 msg("EA/ACLs not supported in this version, skipping\n");
1034 skipfile();
1035 break;
1036 default:
1037 msg("unexpected inode extension %ld, skipping\n", spcl.c_extattributes);
1038 skipfile();
1039 break;
1040 }
1041 }
1042 return GOOD;
1043 }
1044
1045 #ifdef DUMP_MACOSX
1046 int
1047 extractfinderinfoufs(char *name)
1048 {
1049 int err;
1050 char oFileRsrc[MAXPATHLEN];
1051 int flags;
1052 mode_t mode;
1053 struct timeval timep[2];
1054 u_int32_t uid;
1055 u_int32_t gid;
1056 char path[MAXPATHLEN], fname[MAXPATHLEN];
1057 int toto;
1058
1059 curfile.name = name;
1060 curfile.action = USING;
1061 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
1062 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
1063 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
1064 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
1065 mode = curfile.dip->di_mode;
1066 flags = curfile.dip->di_flags;
1067 uid = curfile.dip->di_uid;
1068 gid = curfile.dip->di_gid;
1069
1070 switch (mode & IFMT) {
1071
1072 default:
1073 fprintf(stderr, "%s: (extr. finfoufs) unknown file mode 0%o\n", name, mode);
1074 skipfile();
1075 return (FAIL);
1076
1077 case IFDIR:
1078 fprintf(stderr, "%s: (extr. finfoufs[IFDIR]) unknown file mode 0%o\n", name, mode);
1079 skipfile();
1080 return (FAIL);
1081
1082 case IFLNK:
1083 skipfile();
1084 return (GOOD);
1085
1086 case IFREG:
1087 Vprintf(stdout, "extract finderinfo file %s\n", name);
1088 if (Nflag) {
1089 skipfile();
1090 return (GOOD);
1091 }
1092 getfile(xtrfilefinderinfo, xtrskip);
1093
1094 GetPathFile(name, path, fname);
1095 strcpy(oFileRsrc, path);
1096 strcat(oFileRsrc, "._");
1097 strcat(oFileRsrc, fname);
1098
1099 if ((err = CreateAppleDoubleFileRes(oFileRsrc, &gFndrInfo.fndrinfo,
1100 mode, flags, timep, uid, gid)) != 0) {
1101 fprintf(stderr, "%s: cannot create finderinfo: %s\n",
1102 name, strerror(errno));
1103 skipfile();
1104 return (FAIL);
1105 }
1106 return (GOOD);
1107 }
1108 /* NOTREACHED */
1109 }
1110
1111
1112 int
1113 extractresourceufs(char *name)
1114 {
1115 char oFileRsrc[MAXPATHLEN];
1116 int flags;
1117 mode_t mode;
1118 struct timeval timep[2];
1119 char path[MAXPATHLEN], fname[MAXPATHLEN];
1120 ASDHeaderPtr hp;
1121 ASDEntryPtr ep;
1122 u_long loff;
1123 u_int32_t uid;
1124 u_int32_t gid;
1125 u_int64_t di_size;
1126 char *p;
1127 char buf[1024];
1128
1129 curfile.name = name;
1130 curfile.action = USING;
1131 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
1132 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
1133 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
1134 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
1135 mode = curfile.dip->di_mode;
1136 flags = curfile.dip->di_flags;
1137 uid = curfile.dip->di_uid;
1138 gid = curfile.dip->di_gid;
1139 di_size = curfile.dip->di_size;
1140
1141 switch (mode & IFMT) {
1142
1143 default:
1144 fprintf(stderr, "%s: (extr. resufs) unknown file mode 0%o\n", name, mode);
1145 skipfile();
1146 return (FAIL);
1147
1148 case IFDIR:
1149 fprintf(stderr, "%s: (extr. resufs [IFDIR]) unknown file mode 0%o\n", name, mode);
1150 skipfile();
1151 return (FAIL);
1152
1153 case IFLNK:
1154 skipfile();
1155 return (GOOD);
1156
1157 case IFREG:
1158 Vprintf(stdout, "extract resource file %s\n", name);
1159 if (Nflag) {
1160 skipfile();
1161 return (GOOD);
1162 }
1163
1164 GetPathFile(name, path, fname);
1165 strcpy(oFileRsrc, path);
1166 strcat(oFileRsrc, "._");
1167 strcat(oFileRsrc, fname);
1168
1169 if ((ofile = open(oFileRsrc, O_RDONLY, 0)) < 0) {
1170 fprintf(stderr, "%s: cannot read finderinfo: %s\n",
1171 name, strerror(errno));
1172 skipfile();
1173 return (FAIL);
1174 }
1175 read(ofile, buf, 70);
1176 (void) close(ofile);
1177 p = buf;
1178 hp = (ASDHeaderPtr)p;
1179 /* the header */
1180 hp->entries++;
1181 p += sizeof(ASDHeader) - CORRECT;
1182 ep = (ASDEntryPtr)p;
1183 /* the finderinfo entry */
1184 ep->offset += sizeof(ASDEntry);
1185 loff = ep->offset;
1186
1187 p += sizeof(ASDEntry);
1188 /* the finderinfo data */
1189 bcopy(p, p + sizeof(ASDEntry), INFOLEN);
1190 ep = (ASDEntryPtr)p;
1191 /* the new resourcefork entry */
1192 ep->entryID = EntryRSRCFork;
1193 ep->offset = loff + INFOLEN;
1194 ep->len = di_size;
1195 /* write the new appledouble entries to the file */
1196 if ((ofile = open(oFileRsrc, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
1197 fprintf(stderr, "%s: cannot create resource file: %s\n",
1198 name, strerror(errno));
1199 skipfile();
1200 return (FAIL);
1201 }
1202 write(ofile, buf, 70 + sizeof(ASDEntry));
1203 /* and add the resource data from tape */
1204 getfile(xtrfile, xtrskip);
1205
1206 (void) fchown(ofile, uid, gid);
1207 (void) fchmod(ofile, mode);
1208 (void) close(ofile);
1209 (void) lsetflags(oFileRsrc, flags);
1210 utimes(oFileRsrc, timep);
1211 return (GOOD);
1212 }
1213 /* NOTREACHED */
1214 }
1215 #endif /* DUMP_MACOSX */
1216
1217 /*
1218 * skip over bit maps on the tape
1219 */
1220 void
1221 skipmaps(void)
1222 {
1223
1224 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
1225 skipfile();
1226 }
1227
1228 /*
1229 * skip over a file on the tape
1230 */
1231 void
1232 skipfile(void)
1233 {
1234
1235 curfile.action = SKIP;
1236 getfile(xtrnull, xtrnull);
1237 }
1238
1239 /*
1240 * skip over any extended attributes.
1241 */
1242 void
1243 skipxattr(void)
1244 {
1245
1246 while (spcl.c_flags & DR_EXTATTRIBUTES)
1247 skipfile();
1248 }
1249
1250 /*
1251 * Extract a file from the tape.
1252 * When an allocated block is found it is passed to the fill function;
1253 * when an unallocated block (hole) is found, a zeroed buffer is passed
1254 * to the skip function.
1255 */
1256 void
1257 getfile(void (*fill) __P((char *, size_t)), void (*skip) __P((char *, size_t)))
1258 {
1259 int i;
1260 volatile int curblk = 0;
1261 volatile quad_t size = spcl.c_dinode.di_size;
1262 volatile int last_write_was_hole = 0;
1263 quad_t origsize = size;
1264 static char clearedbuf[MAXBSIZE];
1265 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
1266 char junk[TP_BSIZE];
1267
1268 if (spcl.c_type == TS_END)
1269 panic("ran off end of tape\n");
1270 if (spcl.c_magic != NFS_MAGIC)
1271 panic("not at beginning of a file\n");
1272 if (!gettingfile && setjmp(restart) != 0)
1273 return;
1274 gettingfile++;
1275 loop:
1276 for (i = 0; i < spcl.c_count; i++) {
1277 if (readmapflag || spcl.c_addr[i]) {
1278 readtape(&buf[curblk++][0]);
1279 if (curblk == fssize / TP_BSIZE) {
1280 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
1281 fssize : (curblk - 1) * TP_BSIZE + size));
1282 curblk = 0;
1283 last_write_was_hole = 0;
1284 }
1285 } else {
1286 if (curblk > 0) {
1287 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
1288 curblk * TP_BSIZE :
1289 (curblk - 1) * TP_BSIZE + size));
1290 curblk = 0;
1291 }
1292 (*skip)(clearedbuf, (long)(size > TP_BSIZE ?
1293 TP_BSIZE : size));
1294 last_write_was_hole = 1;
1295 }
1296 if ((size -= TP_BSIZE) <= 0) {
1297 for (i++; i < spcl.c_count; i++)
1298 if (readmapflag || spcl.c_addr[i])
1299 readtape(junk);
1300 break;
1301 }
1302 }
1303 if (gethead(&spcl) == GOOD && size > 0) {
1304 if (spcl.c_type == TS_ADDR)
1305 goto loop;
1306 Dprintf(stdout,
1307 "Missing address (header) block for %s at %ld blocks\n",
1308 curfile.name, (long)blksread);
1309 }
1310 if (curblk > 0) {
1311 (*fill)((char *)buf, (size_t)((curblk * TP_BSIZE) + size));
1312 last_write_was_hole = 0;
1313 }
1314 if (size > 0) {
1315 fprintf(stderr, "Missing blocks at the end of %s, assuming hole\n", curfile.name);
1316 while (size > 0) {
1317 size_t skp = size > TP_BSIZE ? TP_BSIZE : size;
1318 (*skip)(clearedbuf, skp);
1319 size -= skp;
1320 }
1321 last_write_was_hole = 1;
1322 }
1323 if (last_write_was_hole) {
1324 FTRUNCATE(ofile, origsize);
1325 }
1326 if (!readingmaps)
1327 findinode(&spcl);
1328 gettingfile = 0;
1329 }
1330
1331 /*
1332 * Write out the next block of a file.
1333 */
1334 static void
1335 xtrfile(char *buf, size_t size)
1336 {
1337
1338 if (Nflag)
1339 return;
1340 if (write(ofile, buf, (int) size) == -1)
1341 err(1, "write error extracting inode %lu, name %s\nwrite",
1342 (unsigned long)curfile.ino, curfile.name);
1343 }
1344
1345 #ifdef DUMP_MACOSX
1346 static void
1347 xtrfilefinderinfo(char *buf, size_t size)
1348 {
1349 if (Nflag)
1350 return;
1351 bcopy(buf, &gFndrInfo, size);
1352 }
1353 #endif /* DUMP_MACOSX */
1354
1355 /*
1356 * Skip over a hole in a file.
1357 */
1358 /* ARGSUSED */
1359 static void
1360 xtrskip(UNUSED(char *buf), size_t size)
1361 {
1362
1363 if (LSEEK(ofile, (OFF_T)size, SEEK_CUR) == -1)
1364 err(1, "seek error extracting inode %lu, name %s\nlseek",
1365 (unsigned long)curfile.ino, curfile.name);
1366 }
1367
1368 /*
1369 * Collect the next block of a symbolic link.
1370 */
1371 static void
1372 xtrlnkfile(char *buf, size_t size)
1373 {
1374
1375 pathlen += size;
1376 if (pathlen > MAXPATHLEN) {
1377 buf[size - 1] = '\0';
1378 errx(1, "symbolic link name: %s->%s%s; too long %d",
1379 curfile.name, lnkbuf, buf, pathlen);
1380 }
1381 (void) strcat(lnkbuf, buf);
1382 lnkbuf[pathlen] = '\0';
1383 }
1384
1385 /*
1386 * Skip over a hole in a symbolic link (should never happen).
1387 */
1388 /* ARGSUSED */
1389 static void
1390 xtrlnkskip(UNUSED(char *buf), UNUSED(size_t size))
1391 {
1392
1393 errx(1, "unallocated block in symbolic link %s", curfile.name);
1394 }
1395
1396 /*
1397 * Collect the next block of a bit map.
1398 */
1399 static void
1400 xtrmap(char *buf, size_t size)
1401 {
1402
1403 memmove(map, buf, size);
1404 map += size;
1405 }
1406
1407 /*
1408 * Skip over a hole in a bit map (should never happen).
1409 */
1410 /* ARGSUSED */
1411 static void
1412 xtrmapskip(UNUSED(char *buf), size_t size)
1413 {
1414
1415 panic("hole in map\n");
1416 map += size;
1417 }
1418
1419 /*
1420 * Noop, when an extraction function is not needed.
1421 */
1422 /* ARGSUSED */
1423 void
1424 xtrnull(UNUSED(char *buf), UNUSED(size_t size))
1425 {
1426
1427 return;
1428 }
1429
1430 #if COMPARE_ONTHEFLY
1431 /*
1432 * Compare the next block of a file.
1433 */
1434 static void
1435 xtrcmpfile(char *buf, size_t size)
1436 {
1437 static char cmpbuf[MAXBSIZE];
1438
1439 if (cmperror)
1440 return;
1441
1442 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1443 fprintf(stderr, "%s: size has changed.\n",
1444 curfile.name);
1445 cmperror = 1;
1446 return;
1447 }
1448
1449 if (memcmp(buf, cmpbuf, size) != 0) {
1450 fprintf(stderr, "%s: tape and disk copies are different\n",
1451 curfile.name);
1452 cmperror = 1;
1453 return;
1454 }
1455 }
1456
1457 /*
1458 * Skip over a hole in a file.
1459 */
1460 static void
1461 xtrcmpskip(UNUSED(char *buf), size_t size)
1462 {
1463 static char cmpbuf[MAXBSIZE];
1464 int i;
1465
1466 if (cmperror)
1467 return;
1468
1469 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1470 fprintf(stderr, "%s: size has changed.\n",
1471 curfile.name);
1472 cmperror = 1;
1473 return;
1474 }
1475
1476 for (i = 0; i < (int)size; ++i)
1477 if (cmpbuf[i] != '\0') {
1478 fprintf(stderr, "%s: tape and disk copies are different\n",
1479 curfile.name);
1480 cmperror = 1;
1481 return;
1482 }
1483 }
1484 #endif /* COMPARE_ONTHEFLY */
1485
1486 #if !COMPARE_ONTHEFLY
1487 static int
1488 do_cmpfiles(int fd_tape, int fd_disk, OFF_T size)
1489 {
1490 static char buf_tape[BUFSIZ];
1491 static char buf_disk[BUFSIZ];
1492 ssize_t n_tape;
1493 ssize_t n_disk;
1494
1495 while (size > 0) {
1496 if ((n_tape = read(fd_tape, buf_tape, sizeof(buf_tape))) < 1) {
1497 close(fd_tape), close(fd_disk);
1498 panic("do_cmpfiles: unexpected EOF[1]");
1499 }
1500 if ((n_disk = read(fd_disk, buf_disk, sizeof(buf_tape))) < 1) {
1501 close(fd_tape), close(fd_disk);
1502 panic("do_cmpfiles: unexpected EOF[2]");
1503 }
1504 if (n_tape != n_disk) {
1505 close(fd_tape), close(fd_disk);
1506 panic("do_cmpfiles: sizes different!");
1507 }
1508 if (memcmp(buf_tape, buf_disk, (size_t)n_tape) != 0) return (1);
1509 size -= n_tape;
1510 }
1511 return (0);
1512 }
1513
1514 /* for debugging compare problems */
1515 #undef COMPARE_FAIL_KEEP_FILE
1516
1517 static
1518 #ifdef COMPARE_FAIL_KEEP_FILE
1519 /* return true if tapefile should be unlinked after compare */
1520 int
1521 #else
1522 void
1523 #endif
1524 cmpfiles(char *tapefile, char *diskfile, struct STAT *sbuf_disk)
1525 {
1526 struct STAT sbuf_tape;
1527 int fd_tape, fd_disk;
1528
1529 if (STAT(tapefile, &sbuf_tape) != 0) {
1530 panic("Can't lstat tmp file %s: %s\n", tapefile,
1531 strerror(errno));
1532 do_compare_error;
1533 }
1534
1535 if (sbuf_disk->st_size != sbuf_tape.st_size) {
1536 fprintf(stderr,
1537 "%s: size changed from %lld to %lld.\n",
1538 diskfile, (long long)sbuf_tape.st_size, (long long)sbuf_disk->st_size);
1539 do_compare_error;
1540 #ifdef COMPARE_FAIL_KEEP_FILE
1541 return (0);
1542 #else
1543 return;
1544 #endif
1545 }
1546
1547 if ((fd_tape = OPEN(tapefile, O_RDONLY)) < 0) {
1548 panic("Can't open %s: %s\n", tapefile, strerror(errno));
1549 do_compare_error;
1550 }
1551 if ((fd_disk = OPEN(diskfile, O_RDONLY)) < 0) {
1552 close(fd_tape);
1553 panic("Can't open %s: %s\n", diskfile, strerror(errno));
1554 do_compare_error;
1555 }
1556
1557 if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) {
1558 fprintf(stderr, "%s: tape and disk copies are different\n",
1559 diskfile);
1560 close(fd_tape);
1561 close(fd_disk);
1562 do_compare_error;
1563 #ifdef COMPARE_FAIL_KEEP_FILE
1564 /* rename the file to live in /tmp */
1565 /* rename `tapefile' to /tmp/<basename of diskfile> */
1566 {
1567 char *p = strrchr(diskfile, '/');
1568 char newname[MAXPATHLEN];
1569 if (!p) {
1570 panic("can't find / in %s\n", diskfile);
1571 }
1572 snprintf(newname, sizeof(newname), "%s/debug/%s", tmpdir, p + 1);
1573 if (rename(tapefile, newname)) {
1574 panic("rename from %s to %s failed: %s\n",
1575 tapefile, newname,
1576 strerror(errno));
1577 } else {
1578 fprintf(stderr, "*** %s saved to %s\n",
1579 tapefile, newname);
1580 }
1581 }
1582
1583 /* don't unlink the file (it's not there anymore */
1584 /* anyway) */
1585 return (0);
1586 #else
1587 return;
1588 #endif
1589 }
1590 close(fd_tape);
1591 close(fd_disk);
1592 #ifdef COMPARE_FAIL_KEEP_FILE
1593 return (1);
1594 #endif
1595 }
1596 #endif /* !COMPARE_ONTHEFLY */
1597
1598 static void
1599 compareattr(char *name)
1600 {
1601 while (spcl.c_flags & DR_EXTATTRIBUTES) {
1602 switch (spcl.c_extattributes) {
1603 case EXT_MACOSFNDRINFO:
1604 msg("MacOSX not supported for comparision in this version, skipping\n");
1605 skipfile();
1606 break;
1607 case EXT_MACOSRESFORK:
1608 msg("MacOSX not supported for comparision in this version, skipping\n");
1609 skipfile();
1610 break;
1611 case EXT_XATTR:
1612 msg("EA/ACLs not supported for comparision in this version, skipping\n");
1613 skipxattr();
1614 break;
1615 default:
1616 msg("unexpected inode extension %ld, skipping\n", spcl.c_extattributes);
1617 skipfile();
1618 break;
1619 }
1620 }
1621 }
1622
1623 #if !COMPARE_ONTHEFLY
1624 static char tmpfilename[MAXPATHLEN];
1625 #endif
1626
1627 void
1628 comparefile(char *name)
1629 {
1630 mode_t mode;
1631 uid_t uid;
1632 uid_t gid;
1633 unsigned int flags;
1634 unsigned long newflags;
1635 struct STAT sb;
1636 int r;
1637 #if !COMPARE_ONTHEFLY
1638 static char *tmpfile = NULL;
1639 struct STAT stemp;
1640 #endif
1641 curfile.name = name;
1642 curfile.action = USING;
1643 mode = curfile.dip->di_mode;
1644 flags = curfile.dip->di_flags;
1645 uid = curfile.dip->di_uid;
1646 gid = curfile.dip->di_gid;
1647
1648 if ((mode & IFMT) == IFSOCK) {
1649 Vprintf(stdout, "skipped socket %s\n", name);
1650 skipfile();
1651 return;
1652 }
1653
1654 if ((r = LSTAT(name, &sb)) != 0) {
1655 warn("%s: does not exist (%d)", name, r);
1656 do_compare_error;
1657 skipfile();
1658 return;
1659 }
1660
1661 Vprintf(stdout, "comparing %s (size: %lld, mode: 0%o)\n", name,
1662 (long long)sb.st_size, mode);
1663
1664 if (sb.st_mode != mode) {
1665 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
1666 name, mode & 07777, sb.st_mode & 07777);
1667 do_compare_error;
1668 }
1669 if (sb.st_uid != uid) {
1670 fprintf(stderr, "%s: uid changed from %d to %d.\n",
1671 name, uid, sb.st_uid);
1672 do_compare_error;
1673 }
1674 if (sb.st_gid != gid) {
1675 fprintf(stderr, "%s: gid changed from %d to %d.\n",
1676 name, gid, sb.st_gid);
1677 do_compare_error;
1678 }
1679 #ifdef __linux__
1680 if (lgetflags(name, &newflags) < 0) {
1681 warn("%s: lgetflags failed", name);
1682 do_compare_error;
1683 }
1684 else {
1685 if (newflags != flags) {
1686 fprintf(stderr, "%s: flags changed from 0x%08x to 0x%08lx.\n",
1687 name, flags, newflags);
1688 do_compare_error;
1689 }
1690 }
1691 #endif
1692 if (spcl.c_flags & DR_METAONLY) {
1693 skipfile();
1694 return;
1695 }
1696 switch (mode & IFMT) {
1697 default:
1698 skipfile();
1699 return;
1700
1701 case IFSOCK:
1702 skipfile();
1703 return;
1704
1705 case IFDIR:
1706 skipfile();
1707 compareattr(name);
1708 return;
1709
1710 case IFLNK: {
1711 char lbuf[MAXPATHLEN + 1];
1712 int lsize;
1713
1714 if (!(sb.st_mode & S_IFLNK)) {
1715 fprintf(stderr, "%s: is no longer a symbolic link\n",
1716 name);
1717 do_compare_error;
1718 return;
1719 }
1720 lnkbuf[0] = '\0';
1721 pathlen = 0;
1722 getfile(xtrlnkfile, xtrlnkskip);
1723 if (pathlen == 0) {
1724 fprintf(stderr,
1725 "%s: zero length symbolic link (ignored)\n",
1726 name);
1727 do_compare_error;
1728 return;
1729 }
1730 if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) {
1731 panic("readlink of %s failed: %s", name,
1732 strerror(errno));
1733 do_compare_error;
1734 }
1735 lbuf[lsize] = 0;
1736 if (strcmp(lbuf, lnkbuf) != 0) {
1737 fprintf(stderr,
1738 "%s: symbolic link changed from %s to %s.\n",
1739 name, lnkbuf, lbuf);
1740 do_compare_error;
1741 return;
1742 }
1743 compareattr(name);
1744 return;
1745 }
1746
1747 case IFCHR:
1748 case IFBLK:
1749 if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) {
1750 fprintf(stderr, "%s: no longer a special file\n",
1751 name);
1752 do_compare_error;
1753 skipfile();
1754 return;
1755 }
1756
1757 if (sb.st_rdev != (dev_t)curfile.dip->di_rdev) {
1758 fprintf(stderr,
1759 "%s: device changed from %d,%d to %d,%d.\n",
1760 name,
1761 major(curfile.dip->di_rdev),
1762 minor(curfile.dip->di_rdev),
1763 major(sb.st_rdev),
1764 minor(sb.st_rdev));
1765 do_compare_error;
1766 }
1767 skipfile();
1768 compareattr(name);
1769 return;
1770
1771 case IFREG:
1772 #if COMPARE_ONTHEFLY
1773 if ((ifile = OPEN(name, O_RDONLY)) < 0) {
1774 panic("Can't open %s: %s\n", name, strerror(errno));
1775 skipfile();
1776 do_compare_error;
1777 }
1778 else {
1779 cmperror = 0;
1780 getfile(xtrcmpfile, xtrcmpskip);
1781 if (!cmperror) {
1782 char c;
1783 if (read(ifile, &c, 1) != 0) {
1784 fprintf(stderr, "%s: size has changed.\n",
1785 name);
1786 cmperror = 1;
1787 }
1788 }
1789 if (cmperror)
1790 do_compare_error;
1791 close(ifile);
1792 }
1793 #else
1794 if (tmpfile == NULL) {
1795 /* argument to mktemp() must not be in RO space: */
1796 snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir);
1797 tmpfile = mktemp(&tmpfilename[0]);
1798 }
1799 if ((STAT(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) {
1800 panic("cannot delete tmp file %s: %s\n",
1801 tmpfile, strerror(errno));
1802 }
1803 if ((ofile = OPEN(tmpfile, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) {
1804 panic("cannot create file temp file %s: %s\n",
1805 name, strerror(errno));
1806 }
1807 getfile(xtrfile, xtrskip);
1808 (void) close(ofile);
1809 #ifdef COMPARE_FAIL_KEEP_FILE
1810 if (cmpfiles(tmpfile, name, &sb))
1811 unlink(tmpfile);
1812 #else
1813 cmpfiles(tmpfile, name, &sb);
1814 unlink(tmpfile);
1815 #endif
1816 #endif /* COMPARE_ONTHEFLY */
1817 compareattr(name);
1818 return;
1819 }
1820 /* NOTREACHED */
1821 }
1822
1823 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1824 static void (*readtape_func)(char *) = readtape_set;
1825
1826 /*
1827 * Read TP_BSIZE blocks from the input.
1828 * Handle read errors, and end of media.
1829 * Decompress compressed blocks.
1830 */
1831 static void
1832 readtape(char *buf)
1833 {
1834 (*readtape_func)(buf); /* call the actual processing routine */
1835 }
1836
1837 /*
1838 * Set function pointer for readtape() routine. zflag and magtapein must
1839 * be correctly set before the first call to readtape().
1840 */
1841 static void
1842 readtape_set(char *buf)
1843 {
1844 if (!zflag)
1845 readtape_func = readtape_uncompr;
1846 else {
1847 newcomprbuf(ntrec);
1848 if (magtapein)
1849 readtape_func = readtape_comprtape;
1850 else
1851 readtape_func = readtape_comprfile;
1852 }
1853 readtape(buf);
1854 }
1855
1856 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
1857
1858 /*
1859 * This is the original readtape(), it's used for reading uncompressed input.
1860 * Read TP_BSIZE blocks from the input.
1861 * Handle read errors, and end of media.
1862 */
1863 static void
1864 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1865 readtape_uncompr(char *buf)
1866 #else
1867 readtape(char *buf)
1868 #endif
1869 {
1870 ssize_t rd, newvol, i;
1871 int cnt, seek_failed;
1872
1873 if (blkcnt < numtrec) {
1874 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1875 blksread++;
1876 tpblksread++;
1877 return;
1878 }
1879 tbufptr = tapebuf;
1880 for (i = 0; i < ntrec; i++)
1881 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1882 if (numtrec == 0)
1883 numtrec = ntrec;
1884 cnt = ntrec * TP_BSIZE;
1885 rd = 0;
1886 #ifdef USE_QFA
1887 if (createtapeposflag)
1888 (void)GetTapePos(&curtapepos);
1889 #endif
1890 getmore:
1891 #ifdef RRESTORE
1892 if (!Afile && host)
1893 i = rmtread(&tapebuf[rd], cnt);
1894 else
1895 #endif
1896 i = read(mt, &tapebuf[rd], cnt);
1897
1898 /*
1899 * Check for mid-tape short read error.
1900 * If found, skip rest of buffer and start with the next.
1901 */
1902 if (!pipein && numtrec < ntrec && i > 0) {
1903 Dprintf(stdout, "mid-media short read error.\n");
1904 numtrec = ntrec;
1905 }
1906 /*
1907 * Handle partial block read.
1908 */
1909 if (pipein && i == 0 && rd > 0)
1910 i = rd;
1911 else if (i > 0 && i != ntrec * TP_BSIZE) {
1912 if (pipein) {
1913 rd += i;
1914 cnt -= i;
1915 if (cnt > 0)
1916 goto getmore;
1917 i = rd;
1918 } else {
1919 /*
1920 * Short read. Process the blocks read.
1921 */
1922 if (i % TP_BSIZE != 0)
1923 Vprintf(stdout,
1924 "partial block read: %ld should be %ld\n",
1925 (long)i, ntrec * TP_BSIZE);
1926 numtrec = i / TP_BSIZE;
1927 }
1928 }
1929 /*
1930 * Handle read error.
1931 */
1932 if (i < 0) {
1933 fprintf(stderr, "Tape read error while ");
1934 switch (curfile.action) {
1935 default:
1936 fprintf(stderr, "trying to set up tape\n");
1937 break;
1938 case UNKNOWN:
1939 fprintf(stderr, "trying to resynchronize\n");
1940 break;
1941 case USING:
1942 fprintf(stderr, "restoring %s\n", curfile.name);
1943 break;
1944 case SKIP:
1945 fprintf(stderr, "skipping over inode %lu\n",
1946 (unsigned long)curfile.ino);
1947 break;
1948 }
1949 if (!yflag && !reply("continue"))
1950 exit(1);
1951 i = ntrec * TP_BSIZE;
1952 memset(tapebuf, 0, (size_t)i);
1953 #ifdef RRESTORE
1954 if (!Afile && host)
1955 seek_failed = (rmtseek(i, 1) < 0);
1956 else
1957 #endif
1958 seek_failed = (LSEEK(mt, i, SEEK_CUR) == (OFF_T)-1);
1959
1960 if (seek_failed) {
1961 warn("continuation failed");
1962 if (!yflag && !reply("assume end-of-tape and continue"))
1963 exit(1);
1964 i = 0;
1965 }
1966 }
1967 /*
1968 * Handle end of tape.
1969 */
1970 if (i == 0) {
1971 Vprintf(stdout, "End-of-tape encountered\n");
1972 if (!pipein) {
1973 newvol = volno + 1;
1974 volno = 0;
1975 numtrec = 0;
1976 getvol(newvol);
1977 readtape(buf);
1978 return;
1979 }
1980 if (rd % TP_BSIZE != 0)
1981 panic("partial block read: %d should be %d\n",
1982 rd, ntrec * TP_BSIZE);
1983 terminateinput();
1984 memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE);
1985 }
1986 blkcnt = 0;
1987 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1988 blksread++;
1989 tpblksread++;
1990 }
1991
1992 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1993
1994 /*
1995 * Read a compressed format block from a file or pipe and uncompress it.
1996 * Attempt to handle read errors, and end of file.
1997 */
1998 static void
1999 readtape_comprfile(char *buf)
2000 {
2001 long rl, size, i, ret;
2002 int newvol;
2003 struct tapebuf *tpb;
2004
2005 if (blkcnt < numtrec) {
2006 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2007 blksread++;
2008 tpblksread++;
2009 return;
2010 }
2011 /* need to read the next block */
2012 tbufptr = tapebuf;
2013 for (i = 0; i < ntrec; i++)
2014 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2015 numtrec = ntrec;
2016 tpb = (struct tapebuf *) tapebuf;
2017
2018 /* read the block prefix */
2019 ret = read_a_block(mt, tapebuf, PREFIXSIZE, &rl);
2020 converttapebuf(tpb);
2021
2022 if (Vflag && (ret == 0 || rl < (int)PREFIXSIZE || tpb->length == 0))
2023 ret = 0;
2024 if (ret <= 0)
2025 goto readerr;
2026
2027 /* read the data */
2028 size = tpb->length;
2029 if (size > bufsize) {
2030 /* something's wrong */
2031 Vprintf(stdout, "Prefix size error, max size %d, got %ld\n",
2032 bufsize, size);
2033 size = bufsize;
2034 tpb->length = bufsize;
2035 }
2036 ret = read_a_block(mt, tpb->buf, size, &rl);
2037 if (ret <= 0)
2038 goto readerr;
2039
2040 tbufptr = decompress_tapebuf(tpb, rl + PREFIXSIZE);
2041 if (tbufptr == NULL) {
2042 msg_read_error("File decompression error while");
2043 if (!yflag && !reply("continue"))
2044 exit(1);
2045 memset(tapebuf, 0, bufsize);
2046 tbufptr = tapebuf;
2047 }
2048
2049 blkcnt = 0;
2050 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2051 blksread++;
2052 tpblksread++;
2053 return;
2054
2055 readerr:
2056 /* Errors while reading from a file or pipe are catastrophic. Since
2057 * there are no block boundaries, it's impossible to bypass the
2058 * block in error and find the start of the next block.
2059 */
2060 if (ret == 0) {
2061 /* It's possible to have multiple input files using -M
2062 * and -f file1,file2...
2063 */
2064 Vprintf(stdout, "End-of-File encountered\n");
2065 if (!pipein) {
2066 newvol = volno + 1;
2067 volno = 0;
2068 numtrec = 0;
2069 getvol(newvol);
2070 readtape(buf);
2071 return;
2072 }
2073 }
2074 msg_read_error("Read error while");
2075 /* if (!yflag && !reply("continue")) */
2076 exit(1);
2077 }
2078
2079 /*
2080 * Read compressed data from a tape and uncompress it.
2081 * Handle read errors, and end of media.
2082 * Since a tape consists of separate physical blocks, we try
2083 * to recover from errors by repositioning the tape to the next
2084 * block.
2085 */
2086 static void
2087 readtape_comprtape(char *buf)
2088 {
2089 long rl, size, i;
2090 int ret, newvol;
2091 struct tapebuf *tpb;
2092 struct mtop tcom;
2093
2094 if (blkcnt < numtrec) {
2095 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2096 blksread++;
2097 tpblksread++;
2098 return;
2099 }
2100 /* need to read the next block */
2101 tbufptr = tapebuf;
2102 for (i = 0; i < ntrec; i++)
2103 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2104 numtrec = ntrec;
2105 tpb = (struct tapebuf *) tapebuf;
2106
2107 /* read the block */
2108 size = bufsize + PREFIXSIZE;
2109 ret = read_a_block(mt, tapebuf, size, &rl);
2110 if (ret <= 0)
2111 goto readerr;
2112
2113 converttapebuf(tpb);
2114 tbufptr = decompress_tapebuf(tpb, rl);
2115 if (tbufptr == NULL) {
2116 msg_read_error("Tape decompression error while");
2117 if (!yflag && !reply("continue"))
2118 exit(1);
2119 memset(tapebuf, 0, PREFIXSIZE + bufsize);
2120 tbufptr = tapebuf;
2121 }
2122 goto moverecord;
2123
2124 readerr:
2125 /* Handle errors: EOT switches to the next volume, other errors
2126 * attempt to position the tape to the next block.
2127 */
2128 if (ret == 0) {
2129 Vprintf(stdout, "End-of-tape encountered\n");
2130 newvol = volno + 1;
2131 volno = 0;
2132 numtrec = 0;
2133 getvol(newvol);
2134 readtape(buf);
2135 return;
2136 }
2137
2138 msg_read_error("Tape read error while");
2139 if (!yflag && !reply("continue"))
2140 exit(1);
2141 memset(tapebuf, 0, PREFIXSIZE + bufsize);
2142 tbufptr = tapebuf;
2143
2144 #ifdef RRESTORE
2145 if (host)
2146 rl = rmtioctl(MTFSR, 1);
2147 else
2148 #endif
2149 {
2150 tcom.mt_op = MTFSR;
2151 tcom.mt_count = 1;
2152 rl = ioctl(mt, MTIOCTOP, &tcom);
2153 }
2154
2155 if (rl < 0) {
2156 warn("continuation failed");
2157 if (!yflag && !reply("assume end-of-tape and continue"))
2158 exit(1);
2159 ret = 0; /* end of tape */
2160 goto readerr;
2161 }
2162
2163 moverecord:
2164 blkcnt = 0;
2165 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2166 blksread++;
2167 tpblksread++;
2168 }
2169
2170 /*
2171 * Decompress a struct tapebuf into a buffer. readsize is the size read
2172 * from the tape/file and is used for error messages. Returns a pointer
2173 * to the location of the uncompressed buffer or NULL on errors.
2174 * Adjust numtrec and complain for a short block.
2175 */
2176 static char *
2177 decompress_tapebuf(struct tapebuf *tpbin, int readsize)
2178 {
2179 /* If zflag is on, all blocks have a struct tapebuf prefix */
2180 /* zflag gets set in setup() from the dump header */
2181 int cresult, blocklen;
2182 unsigned long worklen;
2183 char *output = NULL,*reason = NULL, *lengtherr = NULL;
2184
2185 /* build a length error message */
2186 blocklen = tpbin->length;
2187 if (readsize < blocklen + (int)PREFIXSIZE)
2188 lengtherr = "short";
2189 else
2190 if (readsize > blocklen + (int)PREFIXSIZE)
2191 lengtherr = "long";
2192
2193 worklen = comprlen;
2194 cresult = 1;
2195 if (tpbin->compressed) {
2196 /* uncompress whatever we read, if it fails, complain later */
2197 if (tpbin->flags == COMPRESS_ZLIB) {
2198 #ifndef HAVE_ZLIB
2199 errx(1,"This restore version doesn't support zlib decompression");
2200 #else
2201 cresult = uncompress(comprbuf, &worklen,
2202 tpbin->buf, blocklen);
2203 output = comprbuf;
2204 switch (cresult) {
2205 case Z_OK:
2206 break;
2207 case Z_MEM_ERROR:
2208 reason = "not enough memory";
2209 break;
2210 case Z_BUF_ERROR:
2211 reason = "buffer too small";
2212 break;
2213 case Z_DATA_ERROR:
2214 reason = "data error";
2215 break;
2216 default:
2217 reason = "unknown";
2218 }
2219 if (cresult == Z_OK)
2220 cresult = 1;
2221 else
2222 cresult = 0;
2223 #endif /* HAVE_ZLIB */
2224 }
2225 if (tpbin->flags == COMPRESS_BZLIB) {
2226 #ifndef HAVE_BZLIB
2227 errx(1,"This restore version doesn't support bzlib decompression");
2228 #else
2229 unsigned int worklen2 = worklen;
2230 cresult = BZ2_bzBuffToBuffDecompress(
2231 comprbuf, &worklen2,
2232 tpbin->buf, blocklen, 0, 0);
2233 worklen = worklen2;
2234 output = comprbuf;
2235 switch (cresult) {
2236 case BZ_OK:
2237 break;
2238 case BZ_MEM_ERROR:
2239 reason = "not enough memory";
2240 break;
2241 case BZ_OUTBUFF_FULL:
2242 reason = "buffer too small";
2243 break;
2244 case BZ_DATA_ERROR:
2245 case BZ_DATA_ERROR_MAGIC:
2246 case BZ_UNEXPECTED_EOF:
2247 reason = "data error";
2248 break;
2249 default:
2250 reason = "unknown";
2251 }
2252 if (cresult == BZ_OK)
2253 cresult = 1;
2254 else
2255 cresult = 0;
2256 #endif /* HAVE_BZLIB */
2257 }
2258 if (tpbin->flags == COMPRESS_LZO) {
2259 #ifndef HAVE_LZO
2260 errx(1,"This restore version doesn't support lzo decompression");
2261 #else
2262 lzo_uint worklen2 = worklen;
2263 cresult = lzo1x_decompress(tpbin->buf, blocklen,
2264 comprbuf, &worklen2, NULL);
2265 worklen = worklen2;
2266 output = comprbuf;
2267 switch (cresult) {
2268 case LZO_E_OK:
2269 break;
2270 case LZO_E_ERROR:
2271 case LZO_E_EOF_NOT_FOUND:
2272 reason = "data error";
2273 break;
2274 default:
2275 reason = "unknown";
2276 }
2277 if (cresult == LZO_E_OK)
2278 cresult = 1;
2279 else
2280 cresult = 0;
2281 #endif /* HAVE_LZO */
2282 }
2283 }
2284 else {
2285 output = tpbin->buf;
2286 worklen = blocklen;
2287 }
2288 if (cresult) {
2289 numtrec = worklen / TP_BSIZE;
2290 if (worklen % TP_BSIZE != 0)
2291 reason = "length mismatch";
2292 }
2293 if (reason) {
2294 if (lengtherr)
2295 fprintf(stderr, "%s compressed block: %d expected: %u\n",
2296 lengtherr, readsize, tpbin->length + PREFIXSIZE);
2297 fprintf(stderr, "decompression error, block %ld: %s\n",
2298 tpblksread+1, reason);
2299 if (!cresult)
2300 output = NULL;
2301 }
2302 return output;
2303 }
2304
2305 /*
2306 * Print an error message for a read error.
2307 * This was exteracted from the original readtape().
2308 */
2309 static void
2310 msg_read_error(char *m)
2311 {
2312 switch (curfile.action) {
2313 default:
2314 fprintf(stderr, "%s trying to set up tape\n", m);
2315 break;
2316 case UNKNOWN:
2317 fprintf(stderr, "%s trying to resynchronize\n", m);
2318 break;
2319 case USING:
2320 fprintf(stderr, "%s restoring %s\n", m, curfile.name);
2321 break;
2322 case SKIP:
2323 fprintf(stderr, "%s skipping over inode %lu\n", m,
2324 (unsigned long)curfile.ino);
2325 break;
2326 }
2327 }
2328 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
2329
2330 /*
2331 * Read the first block and get the blocksize from it. Test
2332 * for a compressed dump tape/file. setup() will make the final
2333 * determination by checking the compressed flag if gethead()
2334 * finds a valid header. The test here is necessary to offset the buffer
2335 * by the size of the compressed prefix. zflag is set here so that
2336 * readtape_set can set the correct function pointer for readtape().
2337 * Note that the first block of each tape/file is not compressed
2338 * and does not have a prefix.
2339 */
2340 static void
2341 findtapeblksize(void)
2342 {
2343 long i;
2344 size_t len;
2345 struct tapebuf *tpb = (struct tapebuf *) tapebuf;
2346 struct s_spcl spclpt;
2347
2348 for (i = 0; i < ntrec; i++)
2349 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2350 blkcnt = 0;
2351 tbufptr = tapebuf;
2352 /*
2353 * For a pipe or file, read in the first record. For a tape, read
2354 * the first block.
2355 */
2356 len = magtapein ? ntrec * TP_BSIZE : TP_BSIZE;
2357
2358 if (read_a_block(mt, tapebuf, len, &i) <= 0)
2359 errx(1, "Tape read error on first record");
2360
2361 memcpy(&spclpt, tapebuf, TP_BSIZE);
2362 if (converthead(&spclpt) == FAIL) {
2363 cvtflag++;
2364 if (converthead(&spclpt) == FAIL) {
2365 /* Special case for old compressed tapes with prefix */
2366 if (magtapein && (i % TP_BSIZE != 0))
2367 goto oldformat;
2368 errx(1, "Tape is not a dump tape");
2369 }
2370 fprintf(stderr, "Converting to new file system format.\n");
2371 }
2372 /*
2373 * If the input is from a file or a pipe, we read TP_BSIZE
2374 * bytes looking for a dump header. If the dump is compressed
2375 * we need to read in the rest of the block, as determined
2376 * by c_ntrec in the dump header. The first block of the
2377 * dump is not compressed and does not have a prefix.
2378 */
2379 if (!magtapein) {
2380 if (spclpt.c_type == TS_TAPE
2381 && spclpt.c_flags & DR_COMPRESSED) {
2382 /* It's a compressed dump file, read in the */
2383 /* rest of the block based on spclpt.c_ntrec. */
2384 if (spclpt.c_ntrec > ntrec)
2385 errx(1, "Tape blocksize is too large, use "
2386 "\'-b %d\' ", spclpt.c_ntrec);
2387 ntrec = spclpt.c_ntrec;
2388 len = (ntrec - 1) * TP_BSIZE;
2389 zflag = 1;
2390 }
2391 else {
2392 /* read in the rest of the block based on bufsize */
2393 len = bufsize - TP_BSIZE;
2394 }
2395 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) < 0
2396 || (i != (long)len && i % TP_BSIZE != 0))
2397 errx(1,"Error reading dump file header");
2398 tbufptr = tapebuf;
2399 numtrec = ntrec;
2400 Vprintf(stdout, "Input block size is %ld\n", ntrec);
2401 return;
2402 } /* if (!magtapein) */
2403
2404 /*
2405 * If the input is a tape, we tried to read ntrec * TP_BSIZE bytes.
2406 * If the value of ntrec is too large, we read less than
2407 * what we asked for; adjust the value of ntrec and test for
2408 * a compressed dump tape.
2409 */
2410 if (i % TP_BSIZE != 0) {
2411 oldformat:
2412 /* may be old format compressed dump tape with a prefix */
2413 memcpy(&spclpt, tpb->buf, TP_BSIZE);
2414 cvtflag = 0;
2415 if (converthead(&spclpt) == FAIL) {
2416 cvtflag++;
2417 if (converthead(&spclpt) == FAIL)
2418 errx(1, "Tape is not a dump tape");
2419 fprintf(stderr, "Converting to new file system format.\n");
2420 }
2421 if (i % TP_BSIZE == PREFIXSIZE
2422 && tpb->compressed == 0
2423 && spclpt.c_type == TS_TAPE
2424 && spclpt.c_flags & DR_COMPRESSED) {
2425 zflag = 1;
2426 tbufptr = tpb->buf;
2427 if (tpb->length > bufsize)
2428 errx(1, "Tape blocksize is too large, use "
2429 "\'-b %d\' ", tpb->length / TP_BSIZE);
2430 }
2431 else
2432 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
2433 i, TP_BSIZE);
2434 }
2435 ntrec = i / TP_BSIZE;
2436 if (spclpt.c_type == TS_TAPE) {
2437 if (spclpt.c_flags & DR_COMPRESSED)
2438 zflag = 1;
2439 if (spclpt.c_ntrec > ntrec)
2440 errx(1, "Tape blocksize is too large, use "
2441 "\'-b %d\' ", spclpt.c_ntrec);
2442 }
2443 numtrec = ntrec;
2444 Vprintf(stdout, "Tape block size is %ld\n", ntrec);
2445 }
2446
2447 /*
2448 * Read a block of data handling all of the messy details.
2449 */
2450 static int read_a_block(int fd, char *buf, size_t len, long *lengthread)
2451 {
2452 long i = 1, size;
2453
2454 size = len;
2455 while (size > 0) {
2456 #ifdef RRESTORE
2457 if (!Afile && host)
2458 i = rmtread(buf, size);
2459 else
2460 #endif
2461 i = read(fd, buf, size);
2462
2463 if (i <= 0)
2464 break; /* EOD or error */
2465 size -= i;
2466 if (magtapein)
2467 break; /* block at a time for mt */
2468 buf += i;
2469 }
2470 *lengthread = len - size;
2471 return i;
2472 }
2473
2474 void
2475 closemt(void)
2476 {
2477
2478 if (mt < 0)
2479 return;
2480 #ifdef RRESTORE
2481 if (!Afile && host)
2482 rmtclose();
2483 else
2484 #endif
2485 (void) close(mt);
2486 }
2487
2488 static void
2489 setmagtapein(void) {
2490 struct mtget mt_stat;
2491 static int done = 0;
2492 if (done)
2493 return;
2494 done = 1;
2495 if (!pipein) {
2496 /* need to know if input is really from a tape */
2497 #ifdef RRESTORE
2498 if (host)
2499 magtapein = !lflag;
2500 else
2501 #endif
2502 magtapein = ioctl(mt, MTIOCGET, (char *)&mt_stat) == 0;
2503 }
2504
2505 Vprintf(stdout,"Input is from a %s %s\n",
2506 host ? "remote" : "local",
2507 magtapein ? "tape" :
2508 Vflag ? "multi-volume (no tape)" : "file/pipe");
2509 }
2510
2511 /*
2512 * Read the next block from the tape.
2513 * Check to see if it is one of several vintage headers.
2514 * If it is an old style header, convert it to a new style header.
2515 * If it is not any valid header, return an error.
2516 */
2517 static int
2518 gethead(struct s_spcl *buf)
2519 {
2520 readtape((char *)buf);
2521 return converthead(buf);
2522 }
2523
2524 static int
2525 converthead(struct s_spcl *buf)
2526 {
2527 int32_t i;
2528 union {
2529 quad_t qval;
2530 int32_t val[2];
2531 } qcvt;
2532 union u_ospcl {
2533 char dummy[TP_BSIZE];
2534 struct s_ospcl {
2535 int32_t c_type;
2536 int32_t c_date;
2537 int32_t c_ddate;
2538 int32_t c_volume;
2539 int32_t c_tapea;
2540 u_int16_t c_inumber;
2541 int32_t c_magic;
2542 int32_t c_checksum;
2543 struct odinode {
2544 u_int16_t odi_mode;
2545 u_int16_t odi_nlink;
2546 u_int16_t odi_uid;
2547 u_int16_t odi_gid;
2548 int32_t odi_size;
2549 int32_t odi_rdev;
2550 char odi_addr[36];
2551 int32_t odi_atime;
2552 int32_t odi_mtime;
2553 int32_t odi_ctime;
2554 } c_dinode;
2555 int32_t c_count;
2556 char c_fill[256];
2557 } s_ospcl;
2558 } u_ospcl;
2559
2560 if (!cvtflag) {
2561 if (buf->c_magic != NFS_MAGIC) {
2562 if (swabi(buf->c_magic) != NFS_MAGIC)
2563 return (FAIL);
2564 if (!Bcvt) {
2565 Vprintf(stdout, "Note: Doing Byte swapping\n");
2566 Bcvt = 1;
2567 }
2568 }
2569 if (checksum((int *)buf) == FAIL)
2570 return (FAIL);
2571 if (Bcvt)
2572 swabst((u_char *)"8i4s31i528bi192b3i", (u_char *)buf);
2573 goto good;
2574 }
2575 memcpy(&u_ospcl.s_ospcl, buf, TP_BSIZE);
2576 if (checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
2577 return(FAIL);
2578 if (u_ospcl.s_ospcl.c_magic == OFS_MAGIC) {
2579 memset((char *)buf, 0, (long)TP_BSIZE);
2580 buf->c_type = u_ospcl.s_ospcl.c_type;
2581 buf->c_date = u_ospcl.s_ospcl.c_date;
2582 buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
2583 buf->c_volume = u_ospcl.s_ospcl.c_volume;
2584 buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
2585 buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
2586 buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
2587 buf->c_magic = u_ospcl.s_ospcl.c_magic;
2588 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
2589 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
2590 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
2591 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
2592 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
2593 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
2594 #if defined(__linux__) || defined(sunos)
2595 buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime;
2596 buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2597 buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2598 #else /* __linux__ || sunos */
2599 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
2600 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2601 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2602 #endif /* __linux__ || sunos */
2603 buf->c_count = u_ospcl.s_ospcl.c_count;
2604 memmove(buf->c_addr, u_ospcl.s_ospcl.c_fill, (long)256);
2605 }
2606 else if (u_ospcl.s_ospcl.c_magic == FS_UFS2_MAGIC) {
2607 buf->c_date = (int32_t)(*(int64_t *)&u_ospcl.dummy[896]);
2608 buf->c_ddate = (int32_t)(*(int64_t *)&u_ospcl.dummy[904]);
2609 buf->c_tapea = (int32_t)(*(int64_t *)&u_ospcl.dummy[912]);
2610 buf->c_firstrec = (int32_t)(*(int64_t *)&u_ospcl.dummy[920]);
2611 buf->c_ntrec = 0;
2612 buf->c_extattributes = 0;
2613 buf->c_flags |= DR_NEWINODEFMT;
2614 ufs2flag = 1;
2615 }
2616 else
2617 return(FAIL);
2618 buf->c_magic = NFS_MAGIC;
2619
2620 good:
2621 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
2622 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
2623 qcvt.qval = buf->c_dinode.di_size;
2624 if (qcvt.val[0] || qcvt.val[1]) {
2625 Vprintf(stdout, "Note: Doing Quad swapping\n");
2626 Qcvt = 1;
2627 }
2628 }
2629 if (Qcvt) {
2630 qcvt.qval = buf->c_dinode.di_size;
2631 i = qcvt.val[1];
2632 qcvt.val[1] = qcvt.val[0];
2633 qcvt.val[0] = i;
2634 buf->c_dinode.di_size = qcvt.qval;
2635 }
2636 readmapflag = 0;
2637
2638 switch (buf->c_type) {
2639
2640 case TS_CLRI:
2641 case TS_BITS:
2642 /*
2643 * Have to patch up missing information in bit map headers
2644 */
2645 buf->c_inumber = 0;
2646 buf->c_dinode.di_size = buf->c_count * TP_BSIZE;
2647 if (buf->c_count > TP_NINDIR)
2648 readmapflag = 1;
2649 else
2650 for (i = 0; i < buf->c_count; i++)
2651 buf->c_addr[i]++;
2652 break;
2653
2654 case TS_TAPE:
2655 if ((buf->c_flags & DR_NEWINODEFMT) == 0)
2656 oldinofmt = 1;
2657 /* fall through */
2658 case TS_END:
2659 buf->c_inumber = 0;
2660 if (buf->c_flags & DR_INODEINFO) {
2661 memcpy(volinfo, buf->c_inos, TP_NINOS * sizeof(dump_ino_t));
2662 if (Bcvt)
2663 swabst((u_char *)"128i", (u_char *)volinfo);
2664 }
2665 break;
2666
2667 case TS_INODE:
2668 case TS_ADDR:
2669 break;
2670
2671 default:
2672 panic("gethead: unknown inode type %d\n", buf->c_type);
2673 break;
2674 }
2675 /*
2676 * If we are restoring a filesystem with old format inodes,
2677 * copy the uid/gid to the new location.
2678 */
2679 if (oldinofmt) {
2680 buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
2681 buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
2682 }
2683 if (dflag)
2684 accthdr(buf);
2685 return(GOOD);
2686 }
2687
2688 static void
2689 converttapebuf(struct tapebuf *tpb)
2690 {
2691 if (Bcvt) {
2692 struct tb {
2693 unsigned int length:28;
2694 unsigned int flags:3;
2695 unsigned int compressed:1;
2696 } tb;
2697 swabst((u_char *)"i", (u_char *)tpb);
2698 memcpy(&tb, tpb, 4);
2699 tpb->length = tb.length;
2700 tpb->flags = tb.flags;
2701 tpb->compressed = tb.compressed;
2702 }
2703 }
2704
2705 /*
2706 * Check that a header is where it belongs and predict the next header
2707 */
2708 static void
2709 accthdr(struct s_spcl *header)
2710 {
2711 static dump_ino_t previno = 0x7fffffff;
2712 static int prevtype;
2713 static long predict;
2714 long blks, i;
2715
2716 if (header->c_type == TS_TAPE) {
2717 fprintf(stderr, "Volume header (%s inode format) ",
2718 oldinofmt ? "old" : "new");
2719 if (header->c_firstrec)
2720 fprintf(stderr, "begins with record %d",
2721 header->c_firstrec);
2722 fprintf(stderr, "\n");
2723 previno = 0x7fffffff;
2724 return;
2725 }
2726 if (previno == 0x7fffffff)
2727 goto newcalc;
2728 switch (prevtype) {
2729 case TS_BITS:
2730 fprintf(stderr, "Dumped inodes map header");
2731 break;
2732 case TS_CLRI:
2733 fprintf(stderr, "Used inodes map header");
2734 break;
2735 case TS_INODE:
2736 fprintf(stderr, "File header, ino %lu", (unsigned long)previno);
2737 break;
2738 case TS_ADDR:
2739 fprintf(stderr, "File continuation header, ino %ld", (long)previno);
2740 break;
2741 case TS_END:
2742 fprintf(stderr, "End of tape header");
2743 break;
2744 }
2745 if (predict != blksread - 1)
2746 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
2747 predict, blksread - 1);
2748 fprintf(stderr, "\n");
2749 newcalc:
2750 blks = 0;
2751 if (header->c_type != TS_END)
2752 for (i = 0; i < header->c_count; i++)
2753 if (readmapflag || header->c_addr[i] != 0)
2754 blks++;
2755 predict = blks;
2756 blksread = 0;
2757 prevtype = header->c_type;
2758 previno = header->c_inumber;
2759 }
2760
2761 /*
2762 * Find an inode header.
2763 * Complain if had to skip, and complain is set.
2764 */
2765 static void
2766 findinode(struct s_spcl *header)
2767 {
2768 static long skipcnt = 0;
2769 long i;
2770 char buf[TP_BSIZE];
2771
2772 curfile.name = "<name unknown>";
2773 curfile.action = UNKNOWN;
2774 curfile.dip = NULL;
2775 curfile.ino = 0;
2776 do {
2777 if (header->c_magic != NFS_MAGIC) {
2778 skipcnt++;
2779 while (gethead(header) == FAIL ||
2780 header->c_date != dumpdate)
2781 skipcnt++;
2782 }
2783 switch (header->c_type) {
2784
2785 case TS_ADDR:
2786 /*
2787 * Skip up to the beginning of the next record
2788 */
2789 for (i = 0; i < header->c_count; i++)
2790 if (header->c_addr[i])
2791 readtape(buf);
2792 while (gethead(header) == FAIL ||
2793 header->c_date != dumpdate)
2794 skipcnt++;
2795 break;
2796
2797 case TS_INODE:
2798 curfile.dip = &header->c_dinode;
2799 curfile.ino = header->c_inumber;
2800 break;
2801
2802 case TS_END:
2803 curfile.ino = maxino;
2804 break;
2805
2806 case TS_CLRI:
2807 curfile.name = "<file removal list>";
2808 break;
2809
2810 case TS_BITS:
2811 curfile.name = "<file dump list>";
2812 break;
2813
2814 case TS_TAPE:
2815 panic("unexpected tape header\n");
2816 /* NOTREACHED */
2817
2818 default:
2819 panic("unknown tape header type %d\n", spcl.c_type);
2820 /* NOTREACHED */
2821
2822 }
2823 } while (header->c_type == TS_ADDR);
2824 if (skipcnt > 0)
2825 #ifdef USE_QFA
2826 if (!noresyncmesg)
2827 #endif
2828 fprintf(stderr, "resync restore, skipped %ld blocks\n",
2829 skipcnt);
2830 skipcnt = 0;
2831 }
2832
2833 static int
2834 checksum(int *buf)
2835 {
2836 int i, j;
2837
2838 j = sizeof(union u_spcl) / sizeof(int);
2839 i = 0;
2840 if(!Bcvt) {
2841 do
2842 i += *buf++;
2843 while (--j);
2844 } else {
2845 /* What happens if we want to read restore tapes
2846 for a 16bit int machine??? */
2847 do
2848 i += swabi(*buf++);
2849 while (--j);
2850 }
2851
2852 if (i != CHECKSUM) {
2853 fprintf(stderr, "Checksum error %o, inode %lu file %s\n", i,
2854 (unsigned long)curfile.ino, curfile.name);
2855 return(FAIL);
2856 }
2857 return(GOOD);
2858 }
2859
2860 #ifdef RRESTORE
2861 #ifdef __STDC__
2862 #include <stdarg.h>
2863 #else
2864 #include <varargs.h>
2865 #endif
2866
2867 void
2868 #ifdef __STDC__
2869 msg(const char *fmt, ...)
2870 #else
2871 msg(fmt, va_alist)
2872 char *fmt;
2873 va_dcl
2874 #endif
2875 {
2876 va_list ap;
2877 #ifdef __STDC__
2878 va_start(ap, fmt);
2879 #else
2880 va_start(ap);
2881 #endif
2882 (void)vfprintf(stderr, fmt, ap);
2883 va_end(ap);
2884 }
2885 #endif /* RRESTORE */
2886
2887 static u_char *
2888 swab16(u_char *sp, int n)
2889 {
2890 char c;
2891
2892 while (--n >= 0) {
2893 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
2894 sp += 2;
2895 }
2896 return (sp);
2897 }
2898
2899 static u_char *
2900 swab32(u_char *sp, int n)
2901 {
2902 char c;
2903
2904 while (--n >= 0) {
2905 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
2906 c = sp[1]; sp[1] = sp[2]; sp[2] = c;
2907 sp += 4;
2908 }
2909 return (sp);
2910 }
2911
2912 static u_char *
2913 swab64(u_char *sp, int n)
2914 {
2915 char c;
2916
2917 while (--n >= 0) {
2918 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
2919 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
2920 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
2921 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
2922 sp += 8;
2923 }
2924 return (sp);
2925 }
2926
2927 void
2928 swabst(u_char *cp, u_char *sp)
2929 {
2930 int n = 0;
2931
2932 while (*cp) {
2933 switch (*cp) {
2934 case '0': case '1': case '2': case '3': case '4':
2935 case '5': case '6': case '7': case '8': case '9':
2936 n = (n * 10) + (*cp++ - '0');
2937 continue;
2938
2939 case 's': case 'w': case 'h':
2940 if (n == 0)
2941 n = 1;
2942 sp = swab16(sp, n);
2943 break;
2944
2945 case 'i':
2946 if (n == 0)
2947 n = 1;
2948 sp = swab32(sp, n);
2949 break;
2950
2951 case 'l':
2952 if (n == 0)
2953 n = 1;
2954 sp = swab64(sp, n);
2955 break;
2956
2957 default: /* Any other character, like 'b' counts as byte. */
2958 if (n == 0)
2959 n = 1;
2960 sp += n;
2961 break;
2962 }
2963 cp++;
2964 n = 0;
2965 }
2966 }
2967
2968 static u_int
2969 swabi(u_int x)
2970 {
2971 swabst((u_char *)"i", (u_char *)&x);
2972 return (x);
2973 }
2974
2975 #if 0
2976 static u_long
2977 swabl(u_long x)
2978 {
2979 swabst((u_char *)"l", (u_char *)&x);
2980 return (x);
2981 }
2982 #endif
2983
2984 void
2985 RequestVol(long tnum)
2986 {
2987 FLUSHTAPEBUF();
2988 getvol(tnum);
2989 }
2990
2991 #ifdef USE_QFA
2992 #ifdef sunos
2993 extern int fdsmtc;
2994
2995 struct uscsi_cmd {
2996 int uscsi_flags; /* read, write, etc. see below */
2997 short uscsi_status; /* resulting status */
2998 short uscsi_timeout; /* Command Timeout */
2999 caddr_t uscsi_cdb; /* cdb to send to target */
3000 caddr_t uscsi_bufaddr; /* i/o source/destination */
3001 u_int uscsi_buflen; /* size of i/o to take place */
3002 u_int uscsi_resid; /* resid from i/o operation */
3003 u_char uscsi_cdblen; /* # of valid cdb bytes */
3004 u_char uscsi_rqlen; /* size of uscsi_rqbuf */
3005 u_char uscsi_rqstatus; /* status of request sense cmd */
3006 u_char uscsi_rqresid; /* resid of request sense cmd */
3007 caddr_t uscsi_rqbuf; /* request sense buffer */
3008 void *uscsi_reserved_5; /* Reserved for Future Use */
3009 };
3010
3011 #define CDB_GROUP0 6 /* 6-byte cdb's */
3012 #define CDB_GROUP1 10 /* 10-byte cdb's */
3013 #define CDB_GROUP2 10 /* 10-byte cdb's */
3014 #define CDB_GROUP3 0 /* reserved */
3015 #define CDB_GROUP4 16 /* 16-byte cdb's */
3016 #define CDB_GROUP5 12 /* 12-byte cdb's */
3017 #define CDB_GROUP6 0 /* reserved */
3018 #define CDB_GROUP7 0 /* reserved */
3019
3020 #define USCSI_WRITE 0x00000 /* send data to device */
3021 #define USCSI_SILENT 0x00001 /* no error messages */
3022 #define USCSI_DIAGNOSE 0x00002 /* fail if any error occurs */
3023 #define USCSI_ISOLATE 0x00004 /* isolate from normal commands */
3024 #define USCSI_READ 0x00008 /* get data from device */
3025 #define USCSI_RESET 0x04000 /* Reset target */
3026 #define USCSI_RESET_ALL 0x08000 /* Reset all targets */
3027 #define USCSI_RQENABLE 0x10000 /* Enable Request Sense extensions */
3028
3029 #define USCSIIOC (0x04 << 8)
3030 #define USCSICMD (USCSIIOC|201) /* user scsi command */
3031
3032 #define USCSI_TIMEOUT 30
3033 #define USCSI_SHORT_TIMEOUT 900
3034 #define USCSI_LONG_TIMEOUT 14000
3035
3036 #define B(s,i) ((unsigned char)((s) >> i))
3037 #define B1(s) ((unsigned char)(s))
3038
3039 #define MSB4(s,v) *(s)=B(v,24),(s)[1]=B(v,16), (s)[2]=B(v,8), (s)[3]=B1(v)
3040
3041
3042 int
3043 GetTapePos(long long *pos)
3044 {
3045 int err = 0;
3046 struct uscsi_cmd scmd;
3047 char buf[512];
3048 char parm[512 * 8];
3049 long lpos;
3050
3051 (void)memset((void *)buf, 0, sizeof(buf));
3052 (void)memset((void *)&scmd, 0, sizeof(scmd));
3053 scmd.uscsi_flags = USCSI_READ|USCSI_SILENT;
3054 scmd.uscsi_timeout = USCSI_TIMEOUT;
3055 scmd.uscsi_cdb = buf;
3056 scmd.uscsi_cdblen = CDB_GROUP1;
3057 buf[0] = 0x34; /* read position */
3058 buf[1] = 0;
3059 (void)memset((void *)parm, 0, 512);
3060 scmd.uscsi_bufaddr = parm;
3061 scmd.uscsi_buflen = 56;
3062 if (ioctl(fdsmtc, USCSICMD, &scmd) == -1) {
3063 err = errno;
3064 return err;
3065 }
3066 (void)memcpy(&lpos, &parm[4], sizeof(long));
3067 *pos = lpos;
3068 return err;
3069 }
3070
3071 int
3072 GotoTapePos(long long pos)
3073 {
3074 int err = 0;
3075 struct uscsi_cmd scmd;
3076 char buf[512];
3077 char parm[512 * 8];
3078 long lpos = (long)pos;
3079
3080 (void)memset((void *)buf, 0, sizeof(buf));
3081 (void)memset((void *)&scmd, 0, sizeof(scmd));
3082 scmd.uscsi_flags = USCSI_WRITE|USCSI_SILENT;
3083 scmd.uscsi_timeout = 360; /* 5 Minutes */
3084 scmd.uscsi_cdb = buf;
3085 scmd.uscsi_cdblen = CDB_GROUP1;
3086 buf[0] = 0x2b; /* locate */
3087 buf[1] = 0;
3088 MSB4(&buf[3], lpos);
3089 (void)memset((void *)parm, 0, 512);
3090 scmd.uscsi_bufaddr = NULL;
3091 scmd.uscsi_buflen = 0;
3092 if (ioctl(fdsmtc, USCSICMD, &scmd) == -1) {
3093 err = errno;
3094 return err;
3095 }
3096 return err;
3097 }
3098 #endif
3099
3100 #define LSEEK_GET_TAPEPOS 10
3101 #define LSEEK_GO2_TAPEPOS 11
3102
3103 #ifdef __linux__
3104 typedef struct mt_pos {
3105 short mt_op;
3106 int mt_count;
3107 } MTPosRec, *MTPosPtr;
3108
3109
3110 /*
3111 * get the current position of the tape
3112 */
3113 int
3114 GetTapePos(long long *pos)
3115 {
3116 int err = 0;
3117
3118 #ifdef RDUMP
3119 if (host) {
3120 *pos = (long long) rmtseek((OFF_T)0, (int)LSEEK_GET_TAPEPOS);
3121 err = *pos < 0;
3122 }
3123 else
3124 #endif
3125 {
3126 if (magtapein) {
3127 long mtpos;
3128 *pos = 0;
3129 err = (ioctl(mt, MTIOCPOS, &mtpos) < 0);
3130 *pos = (long long)mtpos;
3131 }
3132 else {
3133 *pos = LSEEK(mt, 0, SEEK_CUR);
3134 err = (*pos < 0);
3135 }
3136 }
3137 if (err) {
3138 err = errno;
3139 fprintf(stdout, "[%ld] error: %d (getting tapepos: %lld)\n",
3140 (unsigned long)getpid(), err, *pos);
3141 return err;
3142 }
3143 return err;
3144 }
3145
3146 /*
3147 * go to specified position on tape
3148 */
3149 int
3150 GotoTapePos(long long pos)
3151 {
3152 int err = 0;
3153
3154 #ifdef RDUMP
3155 if (host)
3156 err = (rmtseek((OFF_T)pos, (int)LSEEK_GO2_TAPEPOS) < 0);
3157 else
3158 #endif
3159 {
3160 if (magtapein) {
3161 struct mt_pos buf;
3162 buf.mt_op = MTSEEK;
3163 buf.mt_count = (int) pos;
3164 err = (ioctl(mt, MTIOCTOP, &buf) < 0);
3165 }
3166 else {
3167 pos = LSEEK(mt, pos, SEEK_SET);
3168 err = (pos < 0);
3169 }
3170 }
3171 if (err) {
3172 err = errno;
3173 fprintf(stdout, "[%ld] error: %d (setting tapepos: %lld)\n",
3174 (unsigned long)getpid(), err, pos);
3175 return err;
3176 }
3177 return err;
3178 }
3179 #endif /* __linux__ */
3180
3181 /*
3182 * read next data from tape to re-sync
3183 */
3184 void
3185 ReReadFromTape(void)
3186 {
3187 FLUSHTAPEBUF();
3188 noresyncmesg = 1;
3189 if (gethead(&spcl) == FAIL) {
3190 #ifdef DEBUG_QFA
3191 fprintf(stdout, "DEBUG 1 gethead failed\n");
3192 #endif
3193 }
3194 findinode(&spcl);
3195 noresyncmesg = 0;
3196 }
3197
3198 void
3199 ReReadInodeFromTape(dump_ino_t theino)
3200 {
3201 long cntloop = 0;
3202
3203 FLUSHTAPEBUF();
3204 noresyncmesg = 1;
3205 do {
3206 cntloop++;
3207 gethead(&spcl);
3208 } while (!(spcl.c_inumber == theino && spcl.c_type == TS_INODE && spcl.c_date == dumpdate));
3209 #ifdef DEBUG_QFA
3210 fprintf(stderr, "DEBUG: %ld reads\n", cntloop);
3211 fprintf(stderr, "DEBUG: bufsize %ld\n", bufsize);
3212 fprintf(stderr, "DEBUG: ntrec %ld\n", ntrec);
3213 fprintf(stderr, "DEBUG: %ld reads\n", cntloop);
3214 #endif
3215 findinode(&spcl);
3216 noresyncmesg = 0;
3217 }
3218
3219 #ifdef sunos
3220 int
3221 OpenSMTCmt(char *themagtape)
3222 {
3223 if (GetSCSIIDFromPath(themagtape, &scsiid)) {
3224 fprintf(stderr, "can't get SCSI-ID for %s\n", themagtape);
3225 return -1;
3226 }
3227 if (scsiid < 0) {
3228 fprintf(stderr, "can't get SCSI-ID for %s\n", themagtape);
3229 return -1;
3230 }
3231 sprintf(smtcpath, "/dev/rsmtc%ld,0", scsiid);
3232 if ((fdsmtc = open(smtcpath, O_RDWR)) == -1) {
3233 fprintf(stderr, "can't open smtc device: %s, %d\n", smtcpath, errno);
3234 return -1;
3235 }
3236 return 0;
3237 }
3238 #endif /* sunos */
3239 #endif /* USE_QFA */
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