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Some corrections from Uwe Gohlke.
[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 1.76 2003/11/22 16:52:16 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
172 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
173 static void newcomprbuf __P((int));
174 static void (*readtape_func) __P((char *));
175 static void readtape_set __P((char *));
176 static void readtape_uncompr __P((char *));
177 static void readtape_comprfile __P((char *));
178 static void readtape_comprtape __P((char *));
179 static char *decompress_tapebuf __P((struct tapebuf *, int));
180 static void msg_read_error __P((char *));
181 #endif
182 static int read_a_block __P((int, char *, size_t, long *));
183 #define PREFIXSIZE sizeof(struct tapebuf)
184
185 #define COMPARE_ONTHEFLY 1
186
187 #if COMPARE_ONTHEFLY
188 static int ifile; /* input file for compare */
189 static int cmperror; /* compare error */
190 static void xtrcmpfile __P((char *, size_t));
191 static void xtrcmpskip __P((char *, size_t));
192 #endif
193
194 static int readmapflag;
195 static int readingmaps; /* set to 1 while reading the maps */
196
197 #ifdef DUMP_MACOSX
198 static DumpFinderInfo gFndrInfo;
199 #endif
200
201 /*
202 * Set up an input source. This is called from main.c before setup() is.
203 */
204 void
205 setinput(char *source)
206 {
207 int i;
208 char *n;
209
210 FLUSHTAPEBUF();
211 if (bflag)
212 newtapebuf(ntrec);
213 else
214 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
215 terminal = stdin;
216
217 #ifdef RRESTORE
218 if ((n = strchr(source, ':'))) {
219 for (i = 0; i < (n - source); i++) {
220 if (source[i] == '/')
221 break;
222 }
223 if (source[i] != '/') {
224 host = source;
225 source = strchr(host, ':');
226 *source++ = '\0';
227 if (rmthost(host) == 0)
228 exit(1);
229 }
230 } else
231 #endif
232 if (strcmp(source, "-") == 0) {
233 /*
234 * Since input is coming from a pipe we must establish
235 * our own connection to the terminal.
236 */
237 terminal = fopen(_PATH_TTY, "r");
238 if (terminal == NULL) {
239 warn("cannot open %s", _PATH_TTY);
240 terminal = fopen(_PATH_DEVNULL, "r");
241 if (terminal == NULL)
242 err(1, "cannot open %s", _PATH_DEVNULL);
243 }
244 pipein++;
245 }
246 setuid(getuid()); /* no longer need or want root privileges */
247 if (Mflag) {
248 strncpy(magtapeprefix, source, MAXPATHLEN);
249 magtapeprefix[MAXPATHLEN-1] = '\0';
250 snprintf(magtape, MAXPATHLEN, "%s%03d", source, 1);
251 }
252 else
253 strncpy(magtape, source, MAXPATHLEN);
254 magtape[MAXPATHLEN - 1] = '\0';
255 }
256
257 void
258 newtapebuf(long size)
259 {
260 static int tapebufsize = -1;
261
262 ntrec = size;
263 bufsize = ntrec * TP_BSIZE;
264 if (size <= tapebufsize)
265 return;
266 if (tapebuf != NULL)
267 free(tapebuf);
268 tapebuf = malloc(size * TP_BSIZE + sizeof(struct tapebuf));
269 if (tapebuf == NULL)
270 errx(1, "Cannot allocate space for tape buffer");
271 tapebufsize = size;
272 }
273
274 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
275 static void
276 newcomprbuf(int size)
277 {
278 size_t buf_size = (size+1) * TP_BSIZE + sizeof(struct tapebuf);
279 if (buf_size <= comprlen)
280 return;
281 comprlen = buf_size;
282 if (comprbuf != NULL)
283 free(comprbuf);
284 comprbuf = malloc(comprlen);
285 if (comprbuf == NULL)
286 errx(1, "Cannot allocate space for decompress buffer");
287 }
288 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
289
290 /*
291 * Verify that the tape drive can be accessed and
292 * that it actually is a dump tape.
293 */
294 void
295 setup(void)
296 {
297 int i, j, *ip, bot_code;
298 struct STAT stbuf;
299 char *temptape;
300
301 Vprintf(stdout, "Verify tape and initialize maps\n");
302 if (Afile == NULL && bot_script) {
303 msg("Launching %s\n", bot_script);
304 bot_code = system_command(bot_script, magtape, 1);
305 if (bot_code != 0 && bot_code != 1) {
306 msg("Restore aborted by the beginning of tape script\n");
307 exit(1);
308 }
309 }
310
311 if (Afile)
312 temptape = Afile;
313 else
314 temptape = magtape;
315
316 #ifdef RRESTORE
317 if (!Afile && host)
318 mt = rmtopen(temptape, O_RDONLY);
319 else
320 #endif
321 if (pipein)
322 mt = 0;
323 else
324 mt = OPEN(temptape, O_RDONLY, 0);
325 if (mt < 0)
326 err(1, "%s", temptape);
327 if (!Afile) {
328 volno = 1;
329 setmagtapein();
330 setdumpnum();
331 }
332 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
333 readtape_func = readtape_set;
334 #if defined(HAVE_LZO)
335 if (lzo_init() != LZO_E_OK) {
336 msg("internal error - lzo_init failed \n");
337 exit(1);
338 }
339 #endif
340 #endif
341 FLUSHTAPEBUF();
342 findtapeblksize();
343 if (gethead(&spcl) == FAIL) {
344 blkcnt--; /* push back this block */
345 blksread--;
346 tpblksread--;
347 cvtflag++;
348 if (gethead(&spcl) == FAIL)
349 errx(1, "Tape is not a dump tape");
350 fprintf(stderr, "Converting to new file system format.\n");
351 }
352
353 if (zflag) {
354 fprintf(stderr, "Dump tape is compressed.\n");
355 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB) && !defined(HAVE_LZO)
356 errx(1,"This restore version doesn't support decompression");
357 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
358 }
359 if (pipein) {
360 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC;
361 endoftapemark.s_spcl.c_type = TS_END;
362 ip = (int *)&endoftapemark;
363 j = sizeof(union u_spcl) / sizeof(int);
364 i = 0;
365 do
366 i += *ip++;
367 while (--j);
368 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
369 }
370 if (vflag || command == 't' || command == 'C')
371 printdumpinfo();
372 #ifdef USE_QFA
373 if (tapeposflag && (unsigned long)spcl.c_date != qfadumpdate)
374 errx(1, "different QFA/dumpdates detected\n");
375 #endif
376 if (filesys[0] == '\0') {
377 char *dirptr;
378 strncpy(filesys, spcl.c_filesys, NAMELEN);
379 filesys[NAMELEN - 1] = '\0';
380 dirptr = strstr(filesys, " (dir");
381 if (dirptr != NULL)
382 *dirptr = '\0';
383 }
384 dumptime = spcl.c_ddate;
385 dumpdate = spcl.c_date;
386 if (STAT(".", &stbuf) < 0)
387 err(1, "cannot stat .");
388 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
389 fssize = TP_BSIZE;
390 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
391 fssize = stbuf.st_blksize;
392 if (((fssize - 1) & fssize) != 0)
393 errx(1, "bad block size %ld", fssize);
394 if (spcl.c_volume != 1)
395 errx(1, "Tape is not volume 1 of the dump");
396 if (gethead(&spcl) == FAIL) {
397 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
398 panic("no header after volume mark!\n");
399 }
400 readingmaps = 1;
401 findinode(&spcl);
402 if (spcl.c_type != TS_CLRI)
403 errx(1, "Cannot find file removal list");
404 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
405 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
406 if (map == NULL)
407 errx(1, "no memory for active inode map");
408 usedinomap = map;
409 curfile.action = USING;
410 getfile(xtrmap, xtrmapskip);
411 while (spcl.c_type == TS_ADDR) {
412 /* Recompute maxino and the map */
413 dump_ino_t oldmaxino = maxino;
414 maxino += (spcl.c_count * TP_BSIZE * NBBY) + 1;
415 resizemaps(oldmaxino, maxino);
416
417 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
418 getfile(xtrmap, xtrmapskip);
419 }
420 Dprintf(stdout, "maxino = %lu\n", (unsigned long)maxino);
421 if (spcl.c_type != TS_BITS)
422 errx(1, "Cannot find file dump list");
423 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
424 if (map == (char *)NULL)
425 errx(1, "no memory for file dump list");
426 dumpmap = map;
427 curfile.action = USING;
428 getfile(xtrmap, xtrmapskip);
429 while (spcl.c_type == TS_ADDR) {
430 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
431 getfile(xtrmap, xtrmapskip);
432 }
433 /*
434 * If there may be whiteout entries on the tape, pretend that the
435 * whiteout inode exists, so that the whiteout entries can be
436 * extracted.
437 */
438 if (oldinofmt == 0)
439 SETINO(WINO, dumpmap);
440 readingmaps = 0;
441 findinode(&spcl);
442 }
443
444 /*
445 * Prompt user to load a new dump volume.
446 * "Nextvol" is the next suggested volume to use.
447 * This suggested volume is enforced when doing full
448 * or incremental restores, but can be overridden by
449 * the user when only extracting a subset of the files.
450 */
451 void
452 getvol(long nextvol)
453 {
454 long newvol = 0, wantnext = 0, i;
455 long saved_blksread = 0, saved_tpblksread = 0;
456 union u_spcl tmpspcl;
457 # define tmpbuf tmpspcl.s_spcl
458 char buf[TP_BSIZE];
459 int haderror = 0, bot_code = 1;
460
461 if (nextvol == 1) {
462 tapesread = 0;
463 gettingfile = 0;
464 tpblksread = 0;
465 blksread = 0;
466 }
467 if (pipein) {
468 if (nextvol != 1)
469 panic("Changing volumes on pipe input?\n");
470 if (volno == 1)
471 return;
472 goto gethdr;
473 }
474 saved_blksread = blksread;
475 saved_tpblksread = tpblksread;
476 #if defined(USE_QFA) && defined(sunos)
477 if (createtapeposflag || tapeposflag)
478 close(fdsmtc);
479 #endif
480 again:
481 if (pipein)
482 exit(1); /* pipes do not get a second chance */
483 if (aflag || curfile.action != SKIP) {
484 newvol = nextvol;
485 wantnext = 1;
486 } else {
487 newvol = 0;
488 wantnext = 0;
489 }
490 while (newvol <= 0) {
491 if (tapesread == 0) {
492 fprintf(stderr, "%s%s%s%s%s",
493 "You have not read any volumes yet.\n",
494 "Unless you know which volume your",
495 " file(s) are on you should start\n",
496 "with the last volume and work",
497 " towards the first.\n");
498 } else {
499 fprintf(stderr, "You have read volumes");
500 strcpy(buf, ": ");
501 for (i = 1; i < 32; i++)
502 if (tapesread & (1 << i)) {
503 fprintf(stderr, "%s%ld", buf, (long)i);
504 strcpy(buf, ", ");
505 }
506 fprintf(stderr, "\n");
507 }
508 do {
509 fprintf(stderr, "Specify next volume # (none if no more volumes): ");
510 (void) fflush(stderr);
511 (void) fgets(buf, TP_BSIZE, terminal);
512 } while (!feof(terminal) && buf[0] == '\n');
513 if (feof(terminal))
514 exit(1);
515 if (!strcmp(buf, "none\n")) {
516 terminateinput();
517 return;
518 }
519 newvol = atoi(buf);
520 if (newvol <= 0) {
521 fprintf(stderr,
522 "Volume numbers are positive numerics\n");
523 }
524 }
525 if (newvol == volno) {
526 tapesread |= 1 << volno;
527 #if defined(USE_QFA) && defined(sunos)
528 if (createtapeposflag || tapeposflag) {
529 if (OpenSMTCmt(magtape) < 0) {
530 volno = -1;
531 haderror = 1;
532 goto again;
533 }
534 }
535 #endif /* USE_QFA */
536 return;
537 }
538 closemt();
539
540 /*
541 * if using an archive file, reset its name so readtape()
542 * could properly use remote access.
543 */
544 Afile = NULL;
545
546 if (Mflag) {
547 snprintf(magtape, MAXPATHLEN, "%s%03ld", magtapeprefix, newvol);
548 magtape[MAXPATHLEN - 1] = '\0';
549 }
550 if (bot_script && !haderror) {
551 msg("Launching %s\n", bot_script);
552 bot_code = system_command(bot_script, magtape, newvol);
553 if (bot_code != 0 && bot_code != 1) {
554 msg("Restore aborted by the beginning of tape script\n");
555 exit(1);
556 }
557 }
558 if (haderror || (bot_code && !Mflag)) {
559 haderror = 0;
560 #ifdef sunos
561 fprintf(stderr, "Mount volume %ld\n", (long)newvol);
562 #else
563 fprintf(stderr, "Mount tape volume %ld\n", (long)newvol);
564 #endif
565 fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
566 #ifdef sunos
567 fprintf(stderr, "then enter volume name (default: %s) ", magtape);
568 #else
569 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
570 #endif
571 (void) fflush(stderr);
572 (void) fgets(buf, TP_BSIZE, terminal);
573 if (feof(terminal))
574 exit(1);
575 if (!strcmp(buf, "none\n")) {
576 terminateinput();
577 return;
578 }
579 if (buf[0] != '\n') {
580 char *pos;
581 (void) strncpy(magtape, buf, sizeof(magtape));
582 magtape[sizeof(magtape) - 1] = '\0';
583 if ((pos = strchr(magtape, '\n')))
584 magtape[pos - magtape] = '\0';
585 }
586 }
587 #if defined(USE_QFA) && defined(sunos)
588 if (createtapeposflag || tapeposflag) {
589 if (OpenSMTCmt(magtape) < 0) {
590 volno = -1;
591 haderror = 1;
592 goto again;
593 }
594 }
595 #endif /* USE_QFA */
596 #ifdef RRESTORE
597 if (host)
598 mt = rmtopen(magtape, O_RDONLY);
599 else
600 #endif
601 mt = OPEN(magtape, O_RDONLY, 0);
602
603 if (mt == -1) {
604 fprintf(stderr, "Cannot open %s\n", magtape);
605 volno = -1;
606 haderror = 1;
607 goto again;
608 }
609 gethdr:
610 setmagtapein();
611 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
612 readtape_func = readtape_set;
613 #endif
614 volno = newvol;
615 setdumpnum();
616 FLUSHTAPEBUF();
617 findtapeblksize();
618 if (gethead(&tmpbuf) == FAIL) {
619 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
620 fprintf(stderr, "tape is not dump tape\n");
621 volno = 0;
622 haderror = 1;
623 blksread = saved_blksread;
624 tpblksread = saved_tpblksread;
625 goto again;
626 }
627 if (tmpbuf.c_volume != volno) {
628 fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume);
629 volno = 0;
630 haderror = 1;
631 blksread = saved_blksread;
632 tpblksread = saved_tpblksread;
633 goto again;
634 }
635 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
636 fprintf(stderr, "Wrong dump date\n\tgot: %s",
637 #ifdef sunos
638 ctime(&tmpbuf.c_date));
639 #else
640 ctime4(&tmpbuf.c_date));
641 #endif
642 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
643 volno = 0;
644 haderror = 1;
645 blksread = saved_blksread;
646 tpblksread = saved_tpblksread;
647 goto again;
648 }
649 tapesread |= 1 << volno;
650 /*
651 * If continuing from the previous volume, skip over any
652 * blocks read already at the end of the previous volume.
653 *
654 * If coming to this volume at random, skip to the beginning
655 * of the next record.
656 */
657 if (zflag) {
658 fprintf(stderr, "Dump tape is compressed.\n");
659 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB) && !defined(HAVE_LZO)
660 errx(1,"This restore version doesn't support decompression");
661 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
662 }
663 Dprintf(stdout, "read %ld recs, tape starts with %ld\n",
664 tpblksread - 1, (long)tmpbuf.c_firstrec);
665 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
666 if (!wantnext) {
667 tpblksread = tmpbuf.c_firstrec + 1;
668 for (i = tmpbuf.c_count; i > 0; i--)
669 readtape(buf);
670 } else if (tmpbuf.c_firstrec > 0 &&
671 tmpbuf.c_firstrec < tpblksread - 1) {
672 /*
673 * -1 since we've read the volume header
674 */
675 i = tpblksread - tmpbuf.c_firstrec - 1;
676 Dprintf(stderr, "Skipping %ld duplicate record%s.\n",
677 (long)i, i > 1 ? "s" : "");
678 while (--i >= 0)
679 readtape(buf);
680 }
681 }
682 if (curfile.action == USING) {
683 if (volno == 1)
684 panic("active file into volume 1\n");
685 return;
686 }
687 /*
688 * Skip up to the beginning of the next record
689 */
690 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
691 for (i = tmpbuf.c_count; i > 0; i--)
692 readtape(buf);
693 (void) gethead(&spcl);
694 findinode(&spcl);
695 if (gettingfile) {
696 gettingfile = 0;
697 siglongjmp(restart, 1);
698 }
699 }
700
701 /*
702 * Handle unexpected EOF.
703 */
704 static void
705 terminateinput(void)
706 {
707
708 if (gettingfile && curfile.action == USING) {
709 printf("Warning: %s %s\n",
710 "End-of-input encountered while extracting", curfile.name);
711 }
712 curfile.name = "<name unknown>";
713 curfile.action = UNKNOWN;
714 curfile.dip = NULL;
715 curfile.ino = maxino;
716 if (gettingfile) {
717 gettingfile = 0;
718 siglongjmp(restart, 1);
719 }
720 }
721
722 /*
723 * handle multiple dumps per tape by skipping forward to the
724 * appropriate one.
725 */
726 static void
727 setdumpnum(void)
728 {
729 struct mtop tcom;
730
731 if (dumpnum == 1 || volno != 1)
732 return;
733 if (pipein)
734 errx(1, "Cannot have multiple dumps on pipe input");
735 tcom.mt_op = MTFSF;
736 tcom.mt_count = dumpnum - 1;
737 #ifdef RRESTORE
738 if (host) {
739 if (rmtioctl(MTFSF, dumpnum - 1) < 0) {
740 fprintf(stderr, "rmtioctl MTFSF: %s\n", strerror(errno));
741 exit(1);
742 }
743 } else
744 #endif
745 if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0) {
746 fprintf(stderr, "rmtioctl MTFSF: %s\n", strerror(errno));
747 exit(1);
748 /* warn("ioctl MTFSF"); */
749 }
750 }
751
752 void
753 printdumpinfo(void)
754 {
755 #ifdef sunos
756 Vprintf(stdout, "Dump date: %s", ctime(&spcl.c_date));
757 Vprintf(stdout, "Dumped from: %s",
758 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&spcl.c_ddate));
759 if (spcl.c_host[0] == '\0')
760 return;
761 Vprintf(stdout, "Level %d dump of %s on %s:%s\n",
762 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
763 Vprintf(stdout, "Label: %s\n", spcl.c_label);
764 #else
765 fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date));
766 fprintf(stdout, "Dumped from: %s",
767 (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate));
768 if (spcl.c_host[0] == '\0')
769 return;
770 fprintf(stdout, "Level %d dump of %s on %s:%s\n",
771 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
772 fprintf(stdout, "Label: %s\n", spcl.c_label);
773 #endif
774 }
775
776 void
777 printvolinfo(void)
778 {
779 int i;
780
781 if (volinfo[1] == ROOTINO) {
782 printf("Starting inode numbers by volume:\n");
783 for (i = 1; i < (int)TP_NINOS && volinfo[i] != 0; ++i)
784 printf("\tVolume %d: %lu\n", i, (unsigned long)volinfo[i]);
785 }
786 }
787
788
789 int
790 extractfile(struct entry *ep, int doremove)
791 {
792 unsigned int flags;
793 mode_t mode;
794 struct timeval timep[2];
795 char *name = myname(ep);
796
797 /* If removal is requested (-r mode) do remove it unless
798 * we are extracting a metadata only inode */
799 if (spcl.c_flags & DR_METAONLY) {
800 Vprintf(stdout, "file %s is metadata only\n", name);
801 }
802 else {
803 if (doremove) {
804 removeleaf(ep);
805 ep->e_flags &= ~REMOVED;
806 }
807 }
808
809 curfile.name = name;
810 curfile.action = USING;
811 #if defined(__linux__) || defined(sunos)
812 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
813 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
814 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
815 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
816 #else /* __linux__ || sunos */
817 timep[0].tv_sec = curfile.dip->di_atime;
818 timep[0].tv_usec = curfile.dip->di_atimensec / 1000;
819 timep[1].tv_sec = curfile.dip->di_mtime;
820 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000;
821 #endif /* __linux__ */
822 mode = curfile.dip->di_mode;
823 flags = curfile.dip->di_flags;
824 switch (mode & IFMT) {
825
826 default:
827 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
828 skipfile();
829 return (FAIL);
830
831 case IFSOCK:
832 Vprintf(stdout, "skipped socket %s\n", name);
833 skipfile();
834 return (GOOD);
835
836 case IFDIR:
837 if (mflag) {
838 if (ep == NULL || ep->e_flags & EXTRACT)
839 panic("unextracted directory %s\n", name);
840 skipfile();
841 return (GOOD);
842 }
843 Vprintf(stdout, "extract file %s\n", name);
844 return (genliteraldir(name, curfile.ino));
845
846 case IFLNK:
847 {
848 #ifdef HAVE_LCHOWN
849 uid_t luid = curfile.dip->di_uid;
850 gid_t lgid = curfile.dip->di_gid;
851 #endif
852 if (! (spcl.c_flags & DR_METAONLY)) {
853 lnkbuf[0] = '\0';
854 pathlen = 0;
855 getfile(xtrlnkfile, xtrlnkskip);
856 if (pathlen == 0) {
857 Vprintf(stdout,
858 "%s: zero length symbolic link (ignored)\n", name);
859 return (GOOD);
860 }
861 if (linkit(lnkbuf, name, SYMLINK) == FAIL)
862 return (FAIL);
863 }
864 else
865 skipfile();
866
867 #ifdef HAVE_LCHOWN
868 (void) lchown(name, luid, lgid);
869 #endif
870 return (GOOD);
871 }
872
873 case IFIFO:
874 Vprintf(stdout, "extract fifo %s\n", name);
875 if (Nflag) {
876 skipfile();
877 return (GOOD);
878 }
879 if (! (spcl.c_flags & DR_METAONLY)) {
880 if (uflag && !Nflag)
881 (void)unlink(name);
882 if (mkfifo(name, mode) < 0) {
883 warn("%s: cannot create fifo", name);
884 skipfile();
885 return (FAIL);
886 }
887 }
888 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
889 (void) chmod(name, mode);
890 if (flags)
891 #ifdef __linux__
892 (void) fsetflags(name, flags);
893 #else
894 #ifdef sunos
895 {
896 warn("%s: cannot call chflags", name);
897 /* (void) chflags(name, flags); */
898 }
899 #else
900 (void) chflags(name, flags);
901 #endif
902 #endif
903 skipfile();
904 utimes(name, timep);
905 return (GOOD);
906
907 case IFCHR:
908 case IFBLK:
909 Vprintf(stdout, "extract special file %s\n", name);
910 if (Nflag) {
911 skipfile();
912 return (GOOD);
913 }
914 if (! (spcl.c_flags & DR_METAONLY)) {
915 if (uflag)
916 (void)unlink(name);
917 if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) {
918 warn("%s: cannot create special file", name);
919 skipfile();
920 return (FAIL);
921 }
922 }
923 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
924 (void) chmod(name, mode);
925 if (flags)
926 #ifdef __linux__
927 {
928 warn("%s: fsetflags called on a special file", name);
929 (void) fsetflags(name, flags);
930 }
931 #else
932 #ifdef sunos
933 {
934 warn("%s: cannot call chflags on a special file", name);
935 /* (void) chflags(name, flags); */
936 }
937 #else
938 {
939 warn("%s: chflags called on a special file", name);
940 (void) chflags(name, flags);
941 }
942 #endif
943 #endif
944 skipfile();
945 utimes(name, timep);
946 return (GOOD);
947
948 case IFREG:
949 {
950 uid_t luid = curfile.dip->di_uid;
951 gid_t lgid = curfile.dip->di_gid;
952
953 Vprintf(stdout, "extract file %s\n", name);
954 if (Nflag) {
955 skipfile();
956 return (GOOD);
957 }
958 if (! (spcl.c_flags & DR_METAONLY)) {
959 if (uflag)
960 (void)unlink(name);
961 if ((ofile = OPEN(name, O_WRONLY | O_CREAT | O_TRUNC,
962 0666)) < 0) {
963 warn("%s: cannot create file", name);
964 skipfile();
965 return (FAIL);
966 }
967 getfile(xtrfile, xtrskip);
968 (void) close(ofile);
969 }
970 else
971 skipfile();
972 (void) chown(name, luid, lgid);
973 (void) chmod(name, mode);
974 if (flags)
975 #ifdef __linux__
976 (void) fsetflags(name, flags);
977 #else
978 #ifdef sunos
979 {
980 warn("%s: cannot call chflags", name);
981 /* (void) chflags(name, flags); */
982 }
983 #else
984 (void) chflags(name, flags);
985 #endif
986 #endif
987 utimes(name, timep);
988 return (GOOD);
989 }
990 }
991 /* NOTREACHED */
992 }
993
994 #ifdef DUMP_MACOSX
995 int
996 extractfinderinfoufs(char *name)
997 {
998 int err;
999 char oFileRsrc[MAXPATHLEN];
1000 int flags;
1001 mode_t mode;
1002 struct timeval timep[2];
1003 u_int32_t uid;
1004 u_int32_t gid;
1005 char path[MAXPATHLEN], fname[MAXPATHLEN];
1006 int toto;
1007
1008 curfile.name = name;
1009 curfile.action = USING;
1010 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
1011 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
1012 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
1013 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
1014 mode = curfile.dip->di_mode;
1015 flags = curfile.dip->di_flags;
1016 uid = curfile.dip->di_uid;
1017 gid = curfile.dip->di_gid;
1018
1019 switch (mode & IFMT) {
1020
1021 default:
1022 fprintf(stderr, "%s: (extr. finfoufs) unknown file mode 0%o\n", name, mode);
1023 skipfile();
1024 return (FAIL);
1025
1026 case IFDIR:
1027 fprintf(stderr, "%s: (extr. finfoufs[IFDIR]) unknown file mode 0%o\n", name, mode);
1028 skipfile();
1029 return (FAIL);
1030
1031 case IFLNK:
1032 skipfile();
1033 return (GOOD);
1034
1035 case IFREG:
1036 Vprintf(stdout, "extract finderinfo file %s\n", name);
1037 if (Nflag) {
1038 skipfile();
1039 return (GOOD);
1040 }
1041 getfile(xtrfilefinderinfo, xtrskip);
1042
1043 GetPathFile(name, path, fname);
1044 strcpy(oFileRsrc, path);
1045 strcat(oFileRsrc, "._");
1046 strcat(oFileRsrc, fname);
1047
1048 if ((err = CreateAppleDoubleFileRes(oFileRsrc, &gFndrInfo.fndrinfo,
1049 mode, flags, timep, uid, gid)) != 0) {
1050 fprintf(stderr, "%s: cannot create finderinfo: %s\n",
1051 name, strerror(errno));
1052 skipfile();
1053 return (FAIL);
1054 }
1055 return (GOOD);
1056 }
1057 /* NOTREACHED */
1058 }
1059
1060
1061 int
1062 extractresourceufs(char *name)
1063 {
1064 char oFileRsrc[MAXPATHLEN];
1065 int flags;
1066 mode_t mode;
1067 struct timeval timep[2];
1068 char path[MAXPATHLEN], fname[MAXPATHLEN];
1069 ASDHeaderPtr hp;
1070 ASDEntryPtr ep;
1071 u_long loff;
1072 u_int32_t uid;
1073 u_int32_t gid;
1074 u_int64_t di_size;
1075 char *p;
1076 char buf[1024];
1077
1078 curfile.name = name;
1079 curfile.action = USING;
1080 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
1081 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
1082 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
1083 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
1084 mode = curfile.dip->di_mode;
1085 flags = curfile.dip->di_flags;
1086 uid = curfile.dip->di_uid;
1087 gid = curfile.dip->di_gid;
1088 di_size = curfile.dip->di_size;
1089
1090 switch (mode & IFMT) {
1091
1092 default:
1093 fprintf(stderr, "%s: (extr. resufs) unknown file mode 0%o\n", name, mode);
1094 skipfile();
1095 return (FAIL);
1096
1097 case IFDIR:
1098 fprintf(stderr, "%s: (extr. resufs [IFDIR]) unknown file mode 0%o\n", name, mode);
1099 skipfile();
1100 return (FAIL);
1101
1102 case IFLNK:
1103 skipfile();
1104 return (GOOD);
1105
1106 case IFREG:
1107 Vprintf(stdout, "extract resource file %s\n", name);
1108 if (Nflag) {
1109 skipfile();
1110 return (GOOD);
1111 }
1112
1113 GetPathFile(name, path, fname);
1114 strcpy(oFileRsrc, path);
1115 strcat(oFileRsrc, "._");
1116 strcat(oFileRsrc, fname);
1117
1118 if ((ofile = open(oFileRsrc, O_RDONLY, 0)) < 0) {
1119 fprintf(stderr, "%s: cannot read finderinfo: %s\n",
1120 name, strerror(errno));
1121 skipfile();
1122 return (FAIL);
1123 }
1124 read(ofile, buf, 70);
1125 (void) close(ofile);
1126 p = buf;
1127 hp = (ASDHeaderPtr)p;
1128 /* the header */
1129 hp->entries++;
1130 p += sizeof(ASDHeader) - CORRECT;
1131 ep = (ASDEntryPtr)p;
1132 /* the finderinfo entry */
1133 ep->offset += sizeof(ASDEntry);
1134 loff = ep->offset;
1135
1136 p += sizeof(ASDEntry);
1137 /* the finderinfo data */
1138 bcopy(p, p + sizeof(ASDEntry), INFOLEN);
1139 ep = (ASDEntryPtr)p;
1140 /* the new resourcefork entry */
1141 ep->entryID = EntryRSRCFork;
1142 ep->offset = loff + INFOLEN;
1143 ep->len = di_size;
1144 /* write the new appledouble entries to the file */
1145 if ((ofile = open(oFileRsrc, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
1146 fprintf(stderr, "%s: cannot create resource file: %s\n",
1147 name, strerror(errno));
1148 skipfile();
1149 return (FAIL);
1150 }
1151 write(ofile, buf, 70 + sizeof(ASDEntry));
1152 /* and add the resource data from tape */
1153 getfile(xtrfile, xtrskip);
1154
1155 (void) fchown(ofile, uid, gid);
1156 (void) fchmod(ofile, mode);
1157 (void) close(ofile);
1158 (void) fsetflags(oFileRsrc, flags);
1159 utimes(oFileRsrc, timep);
1160 return (GOOD);
1161 }
1162 /* NOTREACHED */
1163 }
1164 #endif /* DUMP_MACOSX */
1165
1166 /*
1167 * skip over bit maps on the tape
1168 */
1169 void
1170 skipmaps(void)
1171 {
1172
1173 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
1174 skipfile();
1175 }
1176
1177 /*
1178 * skip over a file on the tape
1179 */
1180 void
1181 skipfile(void)
1182 {
1183
1184 curfile.action = SKIP;
1185 getfile(xtrnull, xtrnull);
1186 }
1187
1188 /*
1189 * Extract a file from the tape.
1190 * When an allocated block is found it is passed to the fill function;
1191 * when an unallocated block (hole) is found, a zeroed buffer is passed
1192 * to the skip function.
1193 */
1194 void
1195 getfile(void (*fill) __P((char *, size_t)), void (*skip) __P((char *, size_t)))
1196 {
1197 int i;
1198 volatile int curblk = 0;
1199 volatile quad_t size = spcl.c_dinode.di_size;
1200 volatile int last_write_was_hole = 0;
1201 quad_t origsize = size;
1202 static char clearedbuf[MAXBSIZE];
1203 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
1204 char junk[TP_BSIZE];
1205
1206 if (spcl.c_type == TS_END)
1207 panic("ran off end of tape\n");
1208 if (spcl.c_magic != NFS_MAGIC)
1209 panic("not at beginning of a file\n");
1210 if (!gettingfile && setjmp(restart) != 0)
1211 return;
1212 gettingfile++;
1213 loop:
1214 for (i = 0; i < spcl.c_count; i++) {
1215 if (readmapflag || spcl.c_addr[i]) {
1216 readtape(&buf[curblk++][0]);
1217 if (curblk == fssize / TP_BSIZE) {
1218 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
1219 fssize : (curblk - 1) * TP_BSIZE + size));
1220 curblk = 0;
1221 last_write_was_hole = 0;
1222 }
1223 } else {
1224 if (curblk > 0) {
1225 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
1226 curblk * TP_BSIZE :
1227 (curblk - 1) * TP_BSIZE + size));
1228 curblk = 0;
1229 }
1230 (*skip)(clearedbuf, (long)(size > TP_BSIZE ?
1231 TP_BSIZE : size));
1232 last_write_was_hole = 1;
1233 }
1234 if ((size -= TP_BSIZE) <= 0) {
1235 for (i++; i < spcl.c_count; i++)
1236 if (readmapflag || spcl.c_addr[i])
1237 readtape(junk);
1238 break;
1239 }
1240 }
1241 if (gethead(&spcl) == GOOD && size > 0) {
1242 if (spcl.c_type == TS_ADDR)
1243 goto loop;
1244 Dprintf(stdout,
1245 "Missing address (header) block for %s at %ld blocks\n",
1246 curfile.name, (long)blksread);
1247 }
1248 if (curblk > 0) {
1249 (*fill)((char *)buf, (size_t)((curblk * TP_BSIZE) + size));
1250 last_write_was_hole = 0;
1251 }
1252 if (size > 0) {
1253 fprintf(stderr, "Missing blocks at the end of %s, assuming hole\n", curfile.name);
1254 while (size > 0) {
1255 size_t skp = size > TP_BSIZE ? TP_BSIZE : size;
1256 (*skip)(clearedbuf, skp);
1257 size -= skp;
1258 }
1259 last_write_was_hole = 1;
1260 }
1261 if (last_write_was_hole) {
1262 FTRUNCATE(ofile, origsize);
1263 }
1264 if (!readingmaps)
1265 findinode(&spcl);
1266 gettingfile = 0;
1267 }
1268
1269 /*
1270 * Write out the next block of a file.
1271 */
1272 static void
1273 xtrfile(char *buf, size_t size)
1274 {
1275
1276 if (Nflag)
1277 return;
1278 if (write(ofile, buf, (int) size) == -1)
1279 err(1, "write error extracting inode %lu, name %s\nwrite",
1280 (unsigned long)curfile.ino, curfile.name);
1281 }
1282
1283 #ifdef DUMP_MACOSX
1284 static void
1285 xtrfilefinderinfo(char *buf, size_t size)
1286 {
1287 if (Nflag)
1288 return;
1289 bcopy(buf, &gFndrInfo, size);
1290 }
1291 #endif /* DUMP_MACOSX */
1292
1293 /*
1294 * Skip over a hole in a file.
1295 */
1296 /* ARGSUSED */
1297 static void
1298 xtrskip(UNUSED(char *buf), size_t size)
1299 {
1300
1301 if (LSEEK(ofile, (OFF_T)size, SEEK_CUR) == -1)
1302 err(1, "seek error extracting inode %lu, name %s\nlseek",
1303 (unsigned long)curfile.ino, curfile.name);
1304 }
1305
1306 /*
1307 * Collect the next block of a symbolic link.
1308 */
1309 static void
1310 xtrlnkfile(char *buf, size_t size)
1311 {
1312
1313 pathlen += size;
1314 if (pathlen > MAXPATHLEN)
1315 errx(1, "symbolic link name: %s->%s%s; too long %d",
1316 curfile.name, lnkbuf, buf, pathlen);
1317 (void) strcat(lnkbuf, buf);
1318 }
1319
1320 /*
1321 * Skip over a hole in a symbolic link (should never happen).
1322 */
1323 /* ARGSUSED */
1324 static void
1325 xtrlnkskip(UNUSED(char *buf), UNUSED(size_t size))
1326 {
1327
1328 errx(1, "unallocated block in symbolic link %s", curfile.name);
1329 }
1330
1331 /*
1332 * Collect the next block of a bit map.
1333 */
1334 static void
1335 xtrmap(char *buf, size_t size)
1336 {
1337
1338 memmove(map, buf, size);
1339 map += size;
1340 }
1341
1342 /*
1343 * Skip over a hole in a bit map (should never happen).
1344 */
1345 /* ARGSUSED */
1346 static void
1347 xtrmapskip(UNUSED(char *buf), size_t size)
1348 {
1349
1350 panic("hole in map\n");
1351 map += size;
1352 }
1353
1354 /*
1355 * Noop, when an extraction function is not needed.
1356 */
1357 /* ARGSUSED */
1358 void
1359 xtrnull(UNUSED(char *buf), UNUSED(size_t size))
1360 {
1361
1362 return;
1363 }
1364
1365 #if COMPARE_ONTHEFLY
1366 /*
1367 * Compare the next block of a file.
1368 */
1369 static void
1370 xtrcmpfile(char *buf, size_t size)
1371 {
1372 static char cmpbuf[MAXBSIZE];
1373
1374 if (cmperror)
1375 return;
1376
1377 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1378 fprintf(stderr, "%s: size has changed.\n",
1379 curfile.name);
1380 cmperror = 1;
1381 return;
1382 }
1383
1384 if (memcmp(buf, cmpbuf, size) != 0) {
1385 fprintf(stderr, "%s: tape and disk copies are different\n",
1386 curfile.name);
1387 cmperror = 1;
1388 return;
1389 }
1390 }
1391
1392 /*
1393 * Skip over a hole in a file.
1394 */
1395 static void
1396 xtrcmpskip(UNUSED(char *buf), size_t size)
1397 {
1398 static char cmpbuf[MAXBSIZE];
1399 int i;
1400
1401 if (cmperror)
1402 return;
1403
1404 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1405 fprintf(stderr, "%s: size has changed.\n",
1406 curfile.name);
1407 cmperror = 1;
1408 return;
1409 }
1410
1411 for (i = 0; i < (int)size; ++i)
1412 if (cmpbuf[i] != '\0') {
1413 fprintf(stderr, "%s: tape and disk copies are different\n",
1414 curfile.name);
1415 cmperror = 1;
1416 return;
1417 }
1418 }
1419 #endif /* COMPARE_ONTHEFLY */
1420
1421 #if !COMPARE_ONTHEFLY
1422 static int
1423 do_cmpfiles(int fd_tape, int fd_disk, long size)
1424 {
1425 static char buf_tape[BUFSIZ];
1426 static char buf_disk[BUFSIZ];
1427 ssize_t n_tape;
1428 ssize_t n_disk;
1429
1430 while (size > 0) {
1431 if ((n_tape = read(fd_tape, buf_tape, sizeof(buf_tape))) < 1) {
1432 close(fd_tape), close(fd_disk);
1433 panic("do_cmpfiles: unexpected EOF[1]");
1434 }
1435 if ((n_disk = read(fd_disk, buf_disk, sizeof(buf_tape))) < 1) {
1436 close(fd_tape), close(fd_disk);
1437 panic("do_cmpfiles: unexpected EOF[2]");
1438 }
1439 if (n_tape != n_disk) {
1440 close(fd_tape), close(fd_disk);
1441 panic("do_cmpfiles: sizes different!");
1442 }
1443 if (memcmp(buf_tape, buf_disk, (size_t)n_tape) != 0) return (1);
1444 size -= n_tape;
1445 }
1446 return (0);
1447 }
1448
1449 /* for debugging compare problems */
1450 #undef COMPARE_FAIL_KEEP_FILE
1451
1452 static
1453 #ifdef COMPARE_FAIL_KEEP_FILE
1454 /* return true if tapefile should be unlinked after compare */
1455 int
1456 #else
1457 void
1458 #endif
1459 cmpfiles(char *tapefile, char *diskfile, struct STAT *sbuf_disk)
1460 {
1461 struct STAT sbuf_tape;
1462 int fd_tape, fd_disk;
1463
1464 if (STAT(tapefile, &sbuf_tape) != 0) {
1465 panic("Can't lstat tmp file %s: %s\n", tapefile,
1466 strerror(errno));
1467 do_compare_error;
1468 }
1469
1470 if (sbuf_disk->st_size != sbuf_tape.st_size) {
1471 fprintf(stderr,
1472 "%s: size changed from %ld to %ld.\n",
1473 diskfile, (long)sbuf_tape.st_size, (long)sbuf_disk->st_size);
1474 do_compare_error;
1475 #ifdef COMPARE_FAIL_KEEP_FILE
1476 return (0);
1477 #else
1478 return;
1479 #endif
1480 }
1481
1482 if ((fd_tape = OPEN(tapefile, O_RDONLY)) < 0) {
1483 panic("Can't open %s: %s\n", tapefile, strerror(errno));
1484 do_compare_error;
1485 }
1486 if ((fd_disk = OPEN(diskfile, O_RDONLY)) < 0) {
1487 close(fd_tape);
1488 panic("Can't open %s: %s\n", diskfile, strerror(errno));
1489 do_compare_error;
1490 }
1491
1492 if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) {
1493 fprintf(stderr, "%s: tape and disk copies are different\n",
1494 diskfile);
1495 close(fd_tape);
1496 close(fd_disk);
1497 do_compare_error;
1498 #ifdef COMPARE_FAIL_KEEP_FILE
1499 /* rename the file to live in /tmp */
1500 /* rename `tapefile' to /tmp/<basename of diskfile> */
1501 {
1502 char *p = strrchr(diskfile, '/');
1503 char newname[MAXPATHLEN];
1504 if (!p) {
1505 panic("can't find / in %s\n", diskfile);
1506 }
1507 snprintf(newname, sizeof(newname), "%s/debug/%s", tmpdir, p + 1);
1508 if (rename(tapefile, newname)) {
1509 panic("rename from %s to %s failed: %s\n",
1510 tapefile, newname,
1511 strerror(errno));
1512 } else {
1513 fprintf(stderr, "*** %s saved to %s\n",
1514 tapefile, newname);
1515 }
1516 }
1517
1518 /* don't unlink the file (it's not there anymore */
1519 /* anyway) */
1520 return (0);
1521 #else
1522 return;
1523 #endif
1524 }
1525 close(fd_tape);
1526 close(fd_disk);
1527 #ifdef COMPARE_FAIL_KEEP_FILE
1528 return (1);
1529 #endif
1530 }
1531 #endif /* !COMPARE_ONTHEFLY */
1532
1533 #if !COMPARE_ONTHEFLY
1534 static char tmpfilename[MAXPATHLEN];
1535 #endif
1536
1537 void
1538 comparefile(char *name)
1539 {
1540 unsigned int mode;
1541 struct STAT sb;
1542 int r;
1543 #if !COMPARE_ONTHEFLY
1544 static char *tmpfile = NULL;
1545 struct STAT stemp;
1546 #endif
1547
1548 curfile.name = name;
1549 curfile.action = USING;
1550 mode = curfile.dip->di_mode;
1551
1552 if ((mode & IFMT) == IFSOCK) {
1553 Vprintf(stdout, "skipped socket %s\n", name);
1554 skipfile();
1555 return;
1556 }
1557
1558 if ((r = LSTAT(name, &sb)) != 0) {
1559 warn("%s: does not exist (%d)", name, r);
1560 do_compare_error;
1561 skipfile();
1562 return;
1563 }
1564
1565 Vprintf(stdout, "comparing %s (size: %ld, mode: 0%o)\n", name,
1566 (long)sb.st_size, mode);
1567
1568 if (sb.st_mode != mode) {
1569 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
1570 name, mode & 07777, sb.st_mode & 07777);
1571 do_compare_error;
1572 }
1573 if (spcl.c_flags & DR_METAONLY) {
1574 skipfile();
1575 return;
1576 }
1577 switch (mode & IFMT) {
1578 default:
1579 skipfile();
1580 return;
1581
1582 case IFSOCK:
1583 skipfile();
1584 return;
1585
1586 case IFDIR:
1587 skipfile();
1588 return;
1589
1590 case IFLNK: {
1591 char lbuf[MAXPATHLEN + 1];
1592 int lsize;
1593
1594 if (!(sb.st_mode & S_IFLNK)) {
1595 fprintf(stderr, "%s: is no longer a symbolic link\n",
1596 name);
1597 do_compare_error;
1598 return;
1599 }
1600 lnkbuf[0] = '\0';
1601 pathlen = 0;
1602 getfile(xtrlnkfile, xtrlnkskip);
1603 if (pathlen == 0) {
1604 fprintf(stderr,
1605 "%s: zero length symbolic link (ignored)\n",
1606 name);
1607 do_compare_error;
1608 return;
1609 }
1610 if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) {
1611 panic("readlink of %s failed: %s", name,
1612 strerror(errno));
1613 do_compare_error;
1614 }
1615 lbuf[lsize] = 0;
1616 if (strcmp(lbuf, lnkbuf) != 0) {
1617 fprintf(stderr,
1618 "%s: symbolic link changed from %s to %s.\n",
1619 name, lnkbuf, lbuf);
1620 do_compare_error;
1621 return;
1622 }
1623 return;
1624 }
1625
1626 case IFCHR:
1627 case IFBLK:
1628 if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) {
1629 fprintf(stderr, "%s: no longer a special file\n",
1630 name);
1631 do_compare_error;
1632 skipfile();
1633 return;
1634 }
1635
1636 if (sb.st_rdev != (dev_t)curfile.dip->di_rdev) {
1637 fprintf(stderr,
1638 "%s: device changed from %d,%d to %d,%d.\n",
1639 name,
1640 ((int)curfile.dip->di_rdev >> 8) & 0xff,
1641 (int)curfile.dip->di_rdev & 0xff,
1642 ((int)sb.st_rdev >> 8) & 0xff,
1643 (int)sb.st_rdev & 0xff);
1644 do_compare_error;
1645 }
1646 skipfile();
1647 return;
1648
1649 case IFREG:
1650 #if COMPARE_ONTHEFLY
1651 if ((ifile = OPEN(name, O_RDONLY)) < 0) {
1652 panic("Can't open %s: %s\n", name, strerror(errno));
1653 skipfile();
1654 do_compare_error;
1655 }
1656 else {
1657 cmperror = 0;
1658 getfile(xtrcmpfile, xtrcmpskip);
1659 if (!cmperror) {
1660 char c;
1661 if (read(ifile, &c, 1) != 0) {
1662 fprintf(stderr, "%s: size has changed.\n",
1663 name);
1664 cmperror = 1;
1665 }
1666 }
1667 if (cmperror)
1668 do_compare_error;
1669 close(ifile);
1670 }
1671 #else
1672 if (tmpfile == NULL) {
1673 /* argument to mktemp() must not be in RO space: */
1674 snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir);
1675 tmpfile = mktemp(&tmpfilename[0]);
1676 }
1677 if ((STAT(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) {
1678 panic("cannot delete tmp file %s: %s\n",
1679 tmpfile, strerror(errno));
1680 }
1681 if ((ofile = OPEN(tmpfile, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) {
1682 panic("cannot create file temp file %s: %s\n",
1683 name, strerror(errno));
1684 }
1685 getfile(xtrfile, xtrskip);
1686 (void) close(ofile);
1687 #ifdef COMPARE_FAIL_KEEP_FILE
1688 if (cmpfiles(tmpfile, name, &sb))
1689 unlink(tmpfile);
1690 #else
1691 cmpfiles(tmpfile, name, &sb);
1692 unlink(tmpfile);
1693 #endif
1694 #endif /* COMPARE_ONTHEFLY */
1695 return;
1696 }
1697 /* NOTREACHED */
1698 }
1699
1700 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1701 static void (*readtape_func)(char *) = readtape_set;
1702
1703 /*
1704 * Read TP_BSIZE blocks from the input.
1705 * Handle read errors, and end of media.
1706 * Decompress compressed blocks.
1707 */
1708 static void
1709 readtape(char *buf)
1710 {
1711 (*readtape_func)(buf); /* call the actual processing routine */
1712 }
1713
1714 /*
1715 * Set function pointer for readtape() routine. zflag and magtapein must
1716 * be correctly set before the first call to readtape().
1717 */
1718 static void
1719 readtape_set(char *buf)
1720 {
1721 if (!zflag)
1722 readtape_func = readtape_uncompr;
1723 else {
1724 newcomprbuf(ntrec);
1725 if (magtapein)
1726 readtape_func = readtape_comprtape;
1727 else
1728 readtape_func = readtape_comprfile;
1729 }
1730 readtape(buf);
1731 }
1732
1733 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
1734
1735 /*
1736 * This is the original readtape(), it's used for reading uncompressed input.
1737 * Read TP_BSIZE blocks from the input.
1738 * Handle read errors, and end of media.
1739 */
1740 static void
1741 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1742 readtape_uncompr(char *buf)
1743 #else
1744 readtape(char *buf)
1745 #endif
1746 {
1747 ssize_t rd, newvol, i;
1748 int cnt, seek_failed;
1749
1750 if (blkcnt < numtrec) {
1751 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1752 blksread++;
1753 tpblksread++;
1754 return;
1755 }
1756 tbufptr = tapebuf;
1757 for (i = 0; i < ntrec; i++)
1758 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1759 if (numtrec == 0)
1760 numtrec = ntrec;
1761 cnt = ntrec * TP_BSIZE;
1762 rd = 0;
1763 #ifdef USE_QFA
1764 if (createtapeposflag)
1765 (void)GetTapePos(&curtapepos);
1766 #endif
1767 getmore:
1768 #ifdef RRESTORE
1769 if (!Afile && host)
1770 i = rmtread(&tapebuf[rd], cnt);
1771 else
1772 #endif
1773 i = read(mt, &tapebuf[rd], cnt);
1774
1775 /*
1776 * Check for mid-tape short read error.
1777 * If found, skip rest of buffer and start with the next.
1778 */
1779 if (!pipein && numtrec < ntrec && i > 0) {
1780 Dprintf(stdout, "mid-media short read error.\n");
1781 numtrec = ntrec;
1782 }
1783 /*
1784 * Handle partial block read.
1785 */
1786 if (pipein && i == 0 && rd > 0)
1787 i = rd;
1788 else if (i > 0 && i != ntrec * TP_BSIZE) {
1789 if (pipein) {
1790 rd += i;
1791 cnt -= i;
1792 if (cnt > 0)
1793 goto getmore;
1794 i = rd;
1795 } else {
1796 /*
1797 * Short read. Process the blocks read.
1798 */
1799 if (i % TP_BSIZE != 0)
1800 Vprintf(stdout,
1801 "partial block read: %ld should be %ld\n",
1802 (long)i, ntrec * TP_BSIZE);
1803 numtrec = i / TP_BSIZE;
1804 }
1805 }
1806 /*
1807 * Handle read error.
1808 */
1809 if (i < 0) {
1810 fprintf(stderr, "Tape read error while ");
1811 switch (curfile.action) {
1812 default:
1813 fprintf(stderr, "trying to set up tape\n");
1814 break;
1815 case UNKNOWN:
1816 fprintf(stderr, "trying to resynchronize\n");
1817 break;
1818 case USING:
1819 fprintf(stderr, "restoring %s\n", curfile.name);
1820 break;
1821 case SKIP:
1822 fprintf(stderr, "skipping over inode %lu\n",
1823 (unsigned long)curfile.ino);
1824 break;
1825 }
1826 if (!yflag && !reply("continue"))
1827 exit(1);
1828 i = ntrec * TP_BSIZE;
1829 memset(tapebuf, 0, (size_t)i);
1830 #ifdef RRESTORE
1831 if (!Afile && host)
1832 seek_failed = (rmtseek(i, 1) < 0);
1833 else
1834 #endif
1835 seek_failed = (LSEEK(mt, i, SEEK_CUR) == (OFF_T)-1);
1836
1837 if (seek_failed) {
1838 warn("continuation failed");
1839 if (!yflag && !reply("assume end-of-tape and continue"))
1840 exit(1);
1841 i = 0;
1842 }
1843 }
1844 /*
1845 * Handle end of tape.
1846 */
1847 if (i == 0) {
1848 Vprintf(stdout, "End-of-tape encountered\n");
1849 if (!pipein) {
1850 newvol = volno + 1;
1851 volno = 0;
1852 numtrec = 0;
1853 getvol(newvol);
1854 readtape(buf);
1855 return;
1856 }
1857 if (rd % TP_BSIZE != 0)
1858 panic("partial block read: %d should be %d\n",
1859 rd, ntrec * TP_BSIZE);
1860 terminateinput();
1861 memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE);
1862 }
1863 blkcnt = 0;
1864 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1865 blksread++;
1866 tpblksread++;
1867 }
1868
1869 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1870
1871 /*
1872 * Read a compressed format block from a file or pipe and uncompress it.
1873 * Attempt to handle read errors, and end of file.
1874 */
1875 static void
1876 readtape_comprfile(char *buf)
1877 {
1878 long rl, size, i, ret;
1879 int newvol;
1880 struct tapebuf *tpb;
1881
1882 if (blkcnt < numtrec) {
1883 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1884 blksread++;
1885 tpblksread++;
1886 return;
1887 }
1888 /* need to read the next block */
1889 tbufptr = tapebuf;
1890 for (i = 0; i < ntrec; i++)
1891 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1892 numtrec = ntrec;
1893 tpb = (struct tapebuf *) tapebuf;
1894
1895 /* read the block prefix */
1896 ret = read_a_block(mt, tapebuf, PREFIXSIZE, &rl);
1897 converttapebuf(tpb);
1898
1899 if (Vflag && (ret == 0 || rl < (int)PREFIXSIZE || tpb->length == 0))
1900 ret = 0;
1901 if (ret <= 0)
1902 goto readerr;
1903
1904 /* read the data */
1905 size = tpb->length;
1906 if (size > bufsize) {
1907 /* something's wrong */
1908 Vprintf(stdout, "Prefix size error, max size %d, got %ld\n",
1909 bufsize, size);
1910 size = bufsize;
1911 tpb->length = bufsize;
1912 }
1913 ret = read_a_block(mt, tpb->buf, size, &rl);
1914 if (ret <= 0)
1915 goto readerr;
1916
1917 tbufptr = decompress_tapebuf(tpb, rl + PREFIXSIZE);
1918 if (tbufptr == NULL) {
1919 msg_read_error("File decompression error while");
1920 if (!yflag && !reply("continue"))
1921 exit(1);
1922 memset(tapebuf, 0, bufsize);
1923 tbufptr = tapebuf;
1924 }
1925
1926 blkcnt = 0;
1927 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1928 blksread++;
1929 tpblksread++;
1930 return;
1931
1932 readerr:
1933 /* Errors while reading from a file or pipe are catastrophic. Since
1934 * there are no block boundaries, it's impossible to bypass the
1935 * block in error and find the start of the next block.
1936 */
1937 if (ret == 0) {
1938 /* It's possible to have multiple input files using -M
1939 * and -f file1,file2...
1940 */
1941 Vprintf(stdout, "End-of-File encountered\n");
1942 if (!pipein) {
1943 newvol = volno + 1;
1944 volno = 0;
1945 numtrec = 0;
1946 getvol(newvol);
1947 readtape(buf);
1948 return;
1949 }
1950 }
1951 msg_read_error("Read error while");
1952 /* if (!yflag && !reply("continue")) */
1953 exit(1);
1954 }
1955
1956 /*
1957 * Read compressed data from a tape and uncompress it.
1958 * Handle read errors, and end of media.
1959 * Since a tape consists of separate physical blocks, we try
1960 * to recover from errors by repositioning the tape to the next
1961 * block.
1962 */
1963 static void
1964 readtape_comprtape(char *buf)
1965 {
1966 long rl, size, i;
1967 int ret, newvol;
1968 struct tapebuf *tpb;
1969 struct mtop tcom;
1970
1971 if (blkcnt < numtrec) {
1972 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1973 blksread++;
1974 tpblksread++;
1975 return;
1976 }
1977 /* need to read the next block */
1978 tbufptr = tapebuf;
1979 for (i = 0; i < ntrec; i++)
1980 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1981 numtrec = ntrec;
1982 tpb = (struct tapebuf *) tapebuf;
1983
1984 /* read the block */
1985 size = bufsize + PREFIXSIZE;
1986 ret = read_a_block(mt, tapebuf, size, &rl);
1987 if (ret <= 0)
1988 goto readerr;
1989
1990 converttapebuf(tpb);
1991 tbufptr = decompress_tapebuf(tpb, rl);
1992 if (tbufptr == NULL) {
1993 msg_read_error("Tape decompression error while");
1994 if (!yflag && !reply("continue"))
1995 exit(1);
1996 memset(tapebuf, 0, PREFIXSIZE + bufsize);
1997 tbufptr = tapebuf;
1998 }
1999 goto moverecord;
2000
2001 readerr:
2002 /* Handle errors: EOT switches to the next volume, other errors
2003 * attempt to position the tape to the next block.
2004 */
2005 if (ret == 0) {
2006 Vprintf(stdout, "End-of-tape encountered\n");
2007 newvol = volno + 1;
2008 volno = 0;
2009 numtrec = 0;
2010 getvol(newvol);
2011 readtape(buf);
2012 return;
2013 }
2014
2015 msg_read_error("Tape read error while");
2016 if (!yflag && !reply("continue"))
2017 exit(1);
2018 memset(tapebuf, 0, PREFIXSIZE + bufsize);
2019 tbufptr = tapebuf;
2020
2021 #ifdef RRESTORE
2022 if (host)
2023 rl = rmtioctl(MTFSR, 1);
2024 else
2025 #endif
2026 {
2027 tcom.mt_op = MTFSR;
2028 tcom.mt_count = 1;
2029 rl = ioctl(mt, MTIOCTOP, &tcom);
2030 }
2031
2032 if (rl < 0) {
2033 warn("continuation failed");
2034 if (!yflag && !reply("assume end-of-tape and continue"))
2035 exit(1);
2036 ret = 0; /* end of tape */
2037 goto readerr;
2038 }
2039
2040 moverecord:
2041 blkcnt = 0;
2042 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2043 blksread++;
2044 tpblksread++;
2045 }
2046
2047 /*
2048 * Decompress a struct tapebuf into a buffer. readsize is the size read
2049 * from the tape/file and is used for error messages. Returns a pointer
2050 * to the location of the uncompressed buffer or NULL on errors.
2051 * Adjust numtrec and complain for a short block.
2052 */
2053 static char *
2054 decompress_tapebuf(struct tapebuf *tpbin, int readsize)
2055 {
2056 /* If zflag is on, all blocks have a struct tapebuf prefix */
2057 /* zflag gets set in setup() from the dump header */
2058 int cresult, blocklen;
2059 unsigned long worklen;
2060 #ifdef HAVE_BZLIB
2061 unsigned int worklen2;
2062 #endif
2063 char *output = NULL,*reason = NULL, *lengtherr = NULL;
2064
2065 /* build a length error message */
2066 blocklen = tpbin->length;
2067 if (readsize < blocklen + (int)PREFIXSIZE)
2068 lengtherr = "short";
2069 else
2070 if (readsize > blocklen + (int)PREFIXSIZE)
2071 lengtherr = "long";
2072
2073 worklen = comprlen;
2074 cresult = 1;
2075 if (tpbin->compressed) {
2076 /* uncompress whatever we read, if it fails, complain later */
2077 if (tpbin->flags == COMPRESS_ZLIB) {
2078 #ifndef HAVE_ZLIB
2079 errx(1,"This restore version doesn't support zlib decompression");
2080 #else
2081 cresult = uncompress(comprbuf, &worklen,
2082 tpbin->buf, blocklen);
2083 output = comprbuf;
2084 switch (cresult) {
2085 case Z_OK:
2086 break;
2087 case Z_MEM_ERROR:
2088 reason = "not enough memory";
2089 break;
2090 case Z_BUF_ERROR:
2091 reason = "buffer too small";
2092 break;
2093 case Z_DATA_ERROR:
2094 reason = "data error";
2095 break;
2096 default:
2097 reason = "unknown";
2098 }
2099 if (cresult == Z_OK)
2100 cresult = 1;
2101 else
2102 cresult = 0;
2103 #endif /* HAVE_ZLIB */
2104 }
2105 if (tpbin->flags == COMPRESS_BZLIB) {
2106 #ifndef HAVE_BZLIB
2107 errx(1,"This restore version doesn't support bzlib decompression");
2108 #else
2109 worklen2 = worklen;
2110 cresult = BZ2_bzBuffToBuffDecompress(
2111 comprbuf, &worklen2,
2112 tpbin->buf, blocklen, 0, 0);
2113 worklen = worklen2;
2114 output = comprbuf;
2115 switch (cresult) {
2116 case BZ_OK:
2117 break;
2118 case BZ_MEM_ERROR:
2119 reason = "not enough memory";
2120 break;
2121 case BZ_OUTBUFF_FULL:
2122 reason = "buffer too small";
2123 break;
2124 case BZ_DATA_ERROR:
2125 case BZ_DATA_ERROR_MAGIC:
2126 case BZ_UNEXPECTED_EOF:
2127 reason = "data error";
2128 break;
2129 default:
2130 reason = "unknown";
2131 }
2132 if (cresult == BZ_OK)
2133 cresult = 1;
2134 else
2135 cresult = 0;
2136 #endif /* HAVE_BZLIB */
2137 }
2138 if (tpbin->flags == COMPRESS_LZO) {
2139 #ifndef HAVE_LZO
2140 errx(1,"This restore version doesn't support lzo decompression");
2141 #else
2142 cresult = lzo1x_decompress(tpbin->buf, blocklen,
2143 comprbuf, (lzo_uintp) &worklen,NULL);
2144 output = comprbuf;
2145 switch (cresult) {
2146 case LZO_E_OK:
2147 break;
2148 case LZO_E_ERROR:
2149 case LZO_E_EOF_NOT_FOUND:
2150 reason = "data error";
2151 break;
2152 default:
2153 reason = "unknown";
2154 }
2155 if (cresult == LZO_E_OK)
2156 cresult = 1;
2157 else
2158 cresult = 0;
2159 #endif /* HAVE_LZO */
2160 }
2161 }
2162 else {
2163 output = tpbin->buf;
2164 worklen = blocklen;
2165 }
2166 if (cresult) {
2167 numtrec = worklen / TP_BSIZE;
2168 if (worklen % TP_BSIZE != 0)
2169 reason = "length mismatch";
2170 }
2171 if (reason) {
2172 if (lengtherr)
2173 fprintf(stderr, "%s compressed block: %d expected: %d\n",
2174 lengtherr, readsize, tpbin->length + PREFIXSIZE);
2175 fprintf(stderr, "decompression error, block %ld: %s\n",
2176 tpblksread+1, reason);
2177 if (!cresult)
2178 output = NULL;
2179 }
2180 return output;
2181 }
2182
2183 /*
2184 * Print an error message for a read error.
2185 * This was exteracted from the original readtape().
2186 */
2187 static void
2188 msg_read_error(char *m)
2189 {
2190 switch (curfile.action) {
2191 default:
2192 fprintf(stderr, "%s trying to set up tape\n", m);
2193 break;
2194 case UNKNOWN:
2195 fprintf(stderr, "%s trying to resynchronize\n", m);
2196 break;
2197 case USING:
2198 fprintf(stderr, "%s restoring %s\n", m, curfile.name);
2199 break;
2200 case SKIP:
2201 fprintf(stderr, "%s skipping over inode %lu\n", m,
2202 (unsigned long)curfile.ino);
2203 break;
2204 }
2205 }
2206 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
2207
2208 /*
2209 * Read the first block and get the blocksize from it. Test
2210 * for a compressed dump tape/file. setup() will make the final
2211 * determination by checking the compressed flag if gethead()
2212 * finds a valid header. The test here is necessary to offset the buffer
2213 * by the size of the compressed prefix. zflag is set here so that
2214 * readtape_set can set the correct function pointer for readtape().
2215 * Note that the first block of each tape/file is not compressed
2216 * and does not have a prefix.
2217 */
2218 static void
2219 findtapeblksize(void)
2220 {
2221 long i;
2222 size_t len;
2223 struct tapebuf *tpb = (struct tapebuf *) tapebuf;
2224 struct s_spcl spclpt;
2225
2226 for (i = 0; i < ntrec; i++)
2227 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2228 blkcnt = 0;
2229 tbufptr = tapebuf;
2230 /*
2231 * For a pipe or file, read in the first record. For a tape, read
2232 * the first block.
2233 */
2234 len = magtapein ? ntrec * TP_BSIZE : TP_BSIZE;
2235
2236 if (read_a_block(mt, tapebuf, len, &i) <= 0)
2237 errx(1, "Tape read error on first record");
2238
2239 memcpy(&spclpt, tapebuf, TP_BSIZE);
2240 if (converthead(&spclpt) == FAIL) {
2241 cvtflag++;
2242 if (converthead(&spclpt) == FAIL) {
2243 /* Special case for old compressed tapes with prefix */
2244 if (magtapein && (i % TP_BSIZE != 0))
2245 goto oldformat;
2246 errx(1, "Tape is not a dump tape");
2247 }
2248 fprintf(stderr, "Converting to new file system format.\n");
2249 }
2250 /*
2251 * If the input is from a file or a pipe, we read TP_BSIZE
2252 * bytes looking for a dump header. If the dump is compressed
2253 * we need to read in the rest of the block, as determined
2254 * by c_ntrec in the dump header. The first block of the
2255 * dump is not compressed and does not have a prefix.
2256 */
2257 if (!magtapein) {
2258 if (spclpt.c_type == TS_TAPE
2259 && spclpt.c_flags & DR_COMPRESSED) {
2260 /* It's a compressed dump file, read in the */
2261 /* rest of the block based on spclpt.c_ntrec. */
2262 if (spclpt.c_ntrec > ntrec)
2263 errx(1, "Tape blocksize is too large, use "
2264 "\'-b %d\' ", spclpt.c_ntrec);
2265 ntrec = spclpt.c_ntrec;
2266 len = (ntrec - 1) * TP_BSIZE;
2267 zflag = 1;
2268 }
2269 else {
2270 /* read in the rest of the block based on bufsize */
2271 len = bufsize - TP_BSIZE;
2272 }
2273 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) < 0
2274 || (i != (long)len && i % TP_BSIZE != 0))
2275 errx(1,"Error reading dump file header");
2276 tbufptr = tapebuf;
2277 numtrec = ntrec;
2278 Vprintf(stdout, "Input block size is %ld\n", ntrec);
2279 return;
2280 } /* if (!magtapein) */
2281
2282 /*
2283 * If the input is a tape, we tried to read ntrec * TP_BSIZE bytes.
2284 * If the value of ntrec is too large, we read less than
2285 * what we asked for; adjust the value of ntrec and test for
2286 * a compressed dump tape.
2287 */
2288 if (i % TP_BSIZE != 0) {
2289 oldformat:
2290 /* may be old format compressed dump tape with a prefix */
2291 memcpy(&spclpt, tpb->buf, TP_BSIZE);
2292 cvtflag = 0;
2293 if (converthead(&spclpt) == FAIL) {
2294 cvtflag++;
2295 if (converthead(&spclpt) == FAIL)
2296 errx(1, "Tape is not a dump tape");
2297 fprintf(stderr, "Converting to new file system format.\n");
2298 }
2299 if (i % TP_BSIZE == PREFIXSIZE
2300 && tpb->compressed == 0
2301 && spclpt.c_type == TS_TAPE
2302 && spclpt.c_flags & DR_COMPRESSED) {
2303 zflag = 1;
2304 tbufptr = tpb->buf;
2305 if (tpb->length > bufsize)
2306 errx(1, "Tape blocksize is too large, use "
2307 "\'-b %d\' ", tpb->length / TP_BSIZE);
2308 }
2309 else
2310 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
2311 i, TP_BSIZE);
2312 }
2313 ntrec = i / TP_BSIZE;
2314 if (spclpt.c_type == TS_TAPE) {
2315 if (spclpt.c_flags & DR_COMPRESSED)
2316 zflag = 1;
2317 if (spclpt.c_ntrec > ntrec)
2318 errx(1, "Tape blocksize is too large, use "
2319 "\'-b %d\' ", spclpt.c_ntrec);
2320 }
2321 numtrec = ntrec;
2322 Vprintf(stdout, "Tape block size is %ld\n", ntrec);
2323 }
2324
2325 /*
2326 * Read a block of data handling all of the messy details.
2327 */
2328 static int read_a_block(int fd, char *buf, size_t len, long *lengthread)
2329 {
2330 long i = 1, size;
2331
2332 size = len;
2333 while (size > 0) {
2334 #ifdef RRESTORE
2335 if (!Afile && host)
2336 i = rmtread(buf, size);
2337 else
2338 #endif
2339 i = read(fd, buf, size);
2340
2341 if (i <= 0)
2342 break; /* EOD or error */
2343 size -= i;
2344 if (magtapein)
2345 break; /* block at a time for mt */
2346 buf += i;
2347 }
2348 *lengthread = len - size;
2349 return i;
2350 }
2351
2352 void
2353 closemt(void)
2354 {
2355
2356 if (mt < 0)
2357 return;
2358 #ifdef RRESTORE
2359 if (!Afile && host)
2360 rmtclose();
2361 else
2362 #endif
2363 (void) close(mt);
2364 }
2365
2366 static void
2367 setmagtapein(void) {
2368 struct mtget mt_stat;
2369 static int done = 0;
2370 if (done)
2371 return;
2372 done = 1;
2373 if (!pipein) {
2374 /* need to know if input is really from a tape */
2375 #ifdef RRESTORE
2376 if (host)
2377 magtapein = !lflag;
2378 else
2379 #endif
2380 magtapein = ioctl(mt, MTIOCGET, (char *)&mt_stat) == 0;
2381 }
2382
2383 Vprintf(stdout,"Input is from a %s %s\n",
2384 host ? "remote" : "local",
2385 magtapein ? "tape" :
2386 Vflag ? "multi-volume (no tape)" : "file/pipe");
2387 }
2388
2389 /*
2390 * Read the next block from the tape.
2391 * Check to see if it is one of several vintage headers.
2392 * If it is an old style header, convert it to a new style header.
2393 * If it is not any valid header, return an error.
2394 */
2395 static int
2396 gethead(struct s_spcl *buf)
2397 {
2398 readtape((char *)buf);
2399 return converthead(buf);
2400 }
2401
2402 static int
2403 converthead(struct s_spcl *buf)
2404 {
2405 int32_t i;
2406 union {
2407 quad_t qval;
2408 int32_t val[2];
2409 } qcvt;
2410 union u_ospcl {
2411 char dummy[TP_BSIZE];
2412 struct s_ospcl {
2413 int32_t c_type;
2414 int32_t c_date;
2415 int32_t c_ddate;
2416 int32_t c_volume;
2417 int32_t c_tapea;
2418 u_int16_t c_inumber;
2419 int32_t c_magic;
2420 int32_t c_checksum;
2421 struct odinode {
2422 u_int16_t odi_mode;
2423 u_int16_t odi_nlink;
2424 u_int16_t odi_uid;
2425 u_int16_t odi_gid;
2426 int32_t odi_size;
2427 int32_t odi_rdev;
2428 char odi_addr[36];
2429 int32_t odi_atime;
2430 int32_t odi_mtime;
2431 int32_t odi_ctime;
2432 } c_dinode;
2433 int32_t c_count;
2434 char c_fill[256];
2435 } s_ospcl;
2436 } u_ospcl;
2437
2438 if (!cvtflag) {
2439 if (buf->c_magic != NFS_MAGIC) {
2440 if (swabi(buf->c_magic) != NFS_MAGIC)
2441 return (FAIL);
2442 if (!Bcvt) {
2443 Vprintf(stdout, "Note: Doing Byte swapping\n");
2444 Bcvt = 1;
2445 }
2446 }
2447 if (checksum((int *)buf) == FAIL)
2448 return (FAIL);
2449 if (Bcvt)
2450 swabst((u_char *)"8i4s31i528bi192b3i", (u_char *)buf);
2451 goto good;
2452 }
2453 memcpy(&u_ospcl.s_ospcl, buf, TP_BSIZE);
2454 memset((char *)buf, 0, (long)TP_BSIZE);
2455 buf->c_type = u_ospcl.s_ospcl.c_type;
2456 buf->c_date = u_ospcl.s_ospcl.c_date;
2457 buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
2458 buf->c_volume = u_ospcl.s_ospcl.c_volume;
2459 buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
2460 buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
2461 buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
2462 buf->c_magic = u_ospcl.s_ospcl.c_magic;
2463 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
2464 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
2465 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
2466 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
2467 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
2468 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
2469 #if defined(__linux__) || defined(sunos)
2470 buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime;
2471 buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2472 buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2473 #else /* __linux__ || sunos */
2474 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
2475 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2476 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2477 #endif /* __linux__ || sunos */
2478 buf->c_count = u_ospcl.s_ospcl.c_count;
2479 memmove(buf->c_addr, u_ospcl.s_ospcl.c_fill, (long)256);
2480 if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC ||
2481 checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
2482 return(FAIL);
2483 buf->c_magic = NFS_MAGIC;
2484
2485 good:
2486 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
2487 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
2488 qcvt.qval = buf->c_dinode.di_size;
2489 if (qcvt.val[0] || qcvt.val[1]) {
2490 Vprintf(stdout, "Note: Doing Quad swapping\n");
2491 Qcvt = 1;
2492 }
2493 }
2494 if (Qcvt) {
2495 qcvt.qval = buf->c_dinode.di_size;
2496 i = qcvt.val[1];
2497 qcvt.val[1] = qcvt.val[0];
2498 qcvt.val[0] = i;
2499 buf->c_dinode.di_size = qcvt.qval;
2500 }
2501 readmapflag = 0;
2502
2503 switch (buf->c_type) {
2504
2505 case TS_CLRI:
2506 case TS_BITS:
2507 /*
2508 * Have to patch up missing information in bit map headers
2509 */
2510 buf->c_inumber = 0;
2511 buf->c_dinode.di_size = buf->c_count * TP_BSIZE;
2512 if (buf->c_count > TP_NINDIR)
2513 readmapflag = 1;
2514 else
2515 for (i = 0; i < buf->c_count; i++)
2516 buf->c_addr[i]++;
2517 break;
2518
2519 case TS_TAPE:
2520 if ((buf->c_flags & DR_NEWINODEFMT) == 0)
2521 oldinofmt = 1;
2522 /* fall through */
2523 case TS_END:
2524 buf->c_inumber = 0;
2525 if (buf->c_flags & DR_INODEINFO) {
2526 memcpy(volinfo, buf->c_inos, TP_NINOS * sizeof(dump_ino_t));
2527 if (Bcvt)
2528 swabst((u_char *)"128i", (u_char *)volinfo);
2529 }
2530 break;
2531
2532 case TS_INODE:
2533 case TS_ADDR:
2534 break;
2535
2536 default:
2537 panic("gethead: unknown inode type %d\n", buf->c_type);
2538 break;
2539 }
2540 /*
2541 * If we are restoring a filesystem with old format inodes,
2542 * copy the uid/gid to the new location.
2543 */
2544 if (oldinofmt) {
2545 buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
2546 buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
2547 }
2548 if (dflag)
2549 accthdr(buf);
2550 return(GOOD);
2551 }
2552
2553 static void
2554 converttapebuf(struct tapebuf *tpb)
2555 {
2556 if (Bcvt) {
2557 struct tb {
2558 unsigned int length:28;
2559 unsigned int flags:3;
2560 unsigned int compressed:1;
2561 } tb;
2562 swabst((u_char *)"i", (u_char *)tpb);
2563 memcpy(&tb, tpb, 4);
2564 tpb->length = tb.length;
2565 tpb->flags = tb.flags;
2566 tpb->compressed = tb.compressed;
2567 }
2568 }
2569
2570 /*
2571 * Check that a header is where it belongs and predict the next header
2572 */
2573 static void
2574 accthdr(struct s_spcl *header)
2575 {
2576 static dump_ino_t previno = 0x7fffffff;
2577 static int prevtype;
2578 static long predict;
2579 long blks, i;
2580
2581 if (header->c_type == TS_TAPE) {
2582 fprintf(stderr, "Volume header (%s inode format) ",
2583 oldinofmt ? "old" : "new");
2584 if (header->c_firstrec)
2585 fprintf(stderr, "begins with record %d",
2586 header->c_firstrec);
2587 fprintf(stderr, "\n");
2588 previno = 0x7fffffff;
2589 return;
2590 }
2591 if (previno == 0x7fffffff)
2592 goto newcalc;
2593 switch (prevtype) {
2594 case TS_BITS:
2595 fprintf(stderr, "Dumped inodes map header");
2596 break;
2597 case TS_CLRI:
2598 fprintf(stderr, "Used inodes map header");
2599 break;
2600 case TS_INODE:
2601 fprintf(stderr, "File header, ino %lu", (unsigned long)previno);
2602 break;
2603 case TS_ADDR:
2604 fprintf(stderr, "File continuation header, ino %ld", (long)previno);
2605 break;
2606 case TS_END:
2607 fprintf(stderr, "End of tape header");
2608 break;
2609 }
2610 if (predict != blksread - 1)
2611 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
2612 predict, blksread - 1);
2613 fprintf(stderr, "\n");
2614 newcalc:
2615 blks = 0;
2616 if (header->c_type != TS_END)
2617 for (i = 0; i < header->c_count; i++)
2618 if (readmapflag || header->c_addr[i] != 0)
2619 blks++;
2620 predict = blks;
2621 blksread = 0;
2622 prevtype = header->c_type;
2623 previno = header->c_inumber;
2624 }
2625
2626 /*
2627 * Find an inode header.
2628 * Complain if had to skip, and complain is set.
2629 */
2630 static void
2631 findinode(struct s_spcl *header)
2632 {
2633 static long skipcnt = 0;
2634 long i;
2635 char buf[TP_BSIZE];
2636
2637 curfile.name = "<name unknown>";
2638 curfile.action = UNKNOWN;
2639 curfile.dip = NULL;
2640 curfile.ino = 0;
2641 do {
2642 if (header->c_magic != NFS_MAGIC) {
2643 skipcnt++;
2644 while (gethead(header) == FAIL ||
2645 header->c_date != dumpdate)
2646 skipcnt++;
2647 }
2648 switch (header->c_type) {
2649
2650 case TS_ADDR:
2651 /*
2652 * Skip up to the beginning of the next record
2653 */
2654 for (i = 0; i < header->c_count; i++)
2655 if (header->c_addr[i])
2656 readtape(buf);
2657 while (gethead(header) == FAIL ||
2658 header->c_date != dumpdate)
2659 skipcnt++;
2660 break;
2661
2662 case TS_INODE:
2663 curfile.dip = &header->c_dinode;
2664 curfile.ino = header->c_inumber;
2665 break;
2666
2667 case TS_END:
2668 curfile.ino = maxino;
2669 break;
2670
2671 case TS_CLRI:
2672 curfile.name = "<file removal list>";
2673 break;
2674
2675 case TS_BITS:
2676 curfile.name = "<file dump list>";
2677 break;
2678
2679 case TS_TAPE:
2680 panic("unexpected tape header\n");
2681 /* NOTREACHED */
2682
2683 default:
2684 panic("unknown tape header type %d\n", spcl.c_type);
2685 /* NOTREACHED */
2686
2687 }
2688 } while (header->c_type == TS_ADDR);
2689 if (skipcnt > 0)
2690 #ifdef USE_QFA
2691 if (!noresyncmesg)
2692 #endif
2693 fprintf(stderr, "resync restore, skipped %ld blocks\n",
2694 skipcnt);
2695 skipcnt = 0;
2696 }
2697
2698 static int
2699 checksum(int *buf)
2700 {
2701 int i, j;
2702
2703 j = sizeof(union u_spcl) / sizeof(int);
2704 i = 0;
2705 if(!Bcvt) {
2706 do
2707 i += *buf++;
2708 while (--j);
2709 } else {
2710 /* What happens if we want to read restore tapes
2711 for a 16bit int machine??? */
2712 do
2713 i += swabi(*buf++);
2714 while (--j);
2715 }
2716
2717 if (i != CHECKSUM) {
2718 fprintf(stderr, "Checksum error %o, inode %lu file %s\n", i,
2719 (unsigned long)curfile.ino, curfile.name);
2720 return(FAIL);
2721 }
2722 return(GOOD);
2723 }
2724
2725 #ifdef RRESTORE
2726 #ifdef __STDC__
2727 #include <stdarg.h>
2728 #else
2729 #include <varargs.h>
2730 #endif
2731
2732 void
2733 #ifdef __STDC__
2734 msg(const char *fmt, ...)
2735 #else
2736 msg(fmt, va_alist)
2737 char *fmt;
2738 va_dcl
2739 #endif
2740 {
2741 va_list ap;
2742 #ifdef __STDC__
2743 va_start(ap, fmt);
2744 #else
2745 va_start(ap);
2746 #endif
2747 (void)vfprintf(stderr, fmt, ap);
2748 va_end(ap);
2749 }
2750 #endif /* RRESTORE */
2751
2752 static u_char *
2753 swab16(u_char *sp, int n)
2754 {
2755 char c;
2756
2757 while (--n >= 0) {
2758 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
2759 sp += 2;
2760 }
2761 return (sp);
2762 }
2763
2764 static u_char *
2765 swab32(u_char *sp, int n)
2766 {
2767 char c;
2768
2769 while (--n >= 0) {
2770 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
2771 c = sp[1]; sp[1] = sp[2]; sp[2] = c;
2772 sp += 4;
2773 }
2774 return (sp);
2775 }
2776
2777 static u_char *
2778 swab64(u_char *sp, int n)
2779 {
2780 char c;
2781
2782 while (--n >= 0) {
2783 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
2784 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
2785 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
2786 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
2787 sp += 8;
2788 }
2789 return (sp);
2790 }
2791
2792 void
2793 swabst(u_char *cp, u_char *sp)
2794 {
2795 int n = 0;
2796
2797 while (*cp) {
2798 switch (*cp) {
2799 case '0': case '1': case '2': case '3': case '4':
2800 case '5': case '6': case '7': case '8': case '9':
2801 n = (n * 10) + (*cp++ - '0');
2802 continue;
2803
2804 case 's': case 'w': case 'h':
2805 if (n == 0)
2806 n = 1;
2807 sp = swab16(sp, n);
2808 break;
2809
2810 case 'i':
2811 if (n == 0)
2812 n = 1;
2813 sp = swab32(sp, n);
2814 break;
2815
2816 case 'l':
2817 if (n == 0)
2818 n = 1;
2819 sp = swab64(sp, n);
2820 break;
2821
2822 default: /* Any other character, like 'b' counts as byte. */
2823 if (n == 0)
2824 n = 1;
2825 sp += n;
2826 break;
2827 }
2828 cp++;
2829 n = 0;
2830 }
2831 }
2832
2833 static u_int
2834 swabi(u_int x)
2835 {
2836 swabst((u_char *)"i", (u_char *)&x);
2837 return (x);
2838 }
2839
2840 #if 0
2841 static u_long
2842 swabl(u_long x)
2843 {
2844 swabst((u_char *)"l", (u_char *)&x);
2845 return (x);
2846 }
2847 #endif
2848
2849 void
2850 RequestVol(long tnum)
2851 {
2852 FLUSHTAPEBUF();
2853 getvol(tnum);
2854 }
2855
2856 #ifdef USE_QFA
2857 #ifdef sunos
2858 extern int fdsmtc;
2859
2860 struct uscsi_cmd {
2861 int uscsi_flags; /* read, write, etc. see below */
2862 short uscsi_status; /* resulting status */
2863 short uscsi_timeout; /* Command Timeout */
2864 caddr_t uscsi_cdb; /* cdb to send to target */
2865 caddr_t uscsi_bufaddr; /* i/o source/destination */
2866 u_int uscsi_buflen; /* size of i/o to take place */
2867 u_int uscsi_resid; /* resid from i/o operation */
2868 u_char uscsi_cdblen; /* # of valid cdb bytes */
2869 u_char uscsi_rqlen; /* size of uscsi_rqbuf */
2870 u_char uscsi_rqstatus; /* status of request sense cmd */
2871 u_char uscsi_rqresid; /* resid of request sense cmd */
2872 caddr_t uscsi_rqbuf; /* request sense buffer */
2873 void *uscsi_reserved_5; /* Reserved for Future Use */
2874 };
2875
2876 #define CDB_GROUP0 6 /* 6-byte cdb's */
2877 #define CDB_GROUP1 10 /* 10-byte cdb's */
2878 #define CDB_GROUP2 10 /* 10-byte cdb's */
2879 #define CDB_GROUP3 0 /* reserved */
2880 #define CDB_GROUP4 16 /* 16-byte cdb's */
2881 #define CDB_GROUP5 12 /* 12-byte cdb's */
2882 #define CDB_GROUP6 0 /* reserved */
2883 #define CDB_GROUP7 0 /* reserved */
2884
2885 #define USCSI_WRITE 0x00000 /* send data to device */
2886 #define USCSI_SILENT 0x00001 /* no error messages */
2887 #define USCSI_DIAGNOSE 0x00002 /* fail if any error occurs */
2888 #define USCSI_ISOLATE 0x00004 /* isolate from normal commands */
2889 #define USCSI_READ 0x00008 /* get data from device */
2890 #define USCSI_RESET 0x04000 /* Reset target */
2891 #define USCSI_RESET_ALL 0x08000 /* Reset all targets */
2892 #define USCSI_RQENABLE 0x10000 /* Enable Request Sense extensions */
2893
2894 #define USCSIIOC (0x04 << 8)
2895 #define USCSICMD (USCSIIOC|201) /* user scsi command */
2896
2897 #define USCSI_TIMEOUT 30
2898 #define USCSI_SHORT_TIMEOUT 900
2899 #define USCSI_LONG_TIMEOUT 14000
2900
2901 #define B(s,i) ((unsigned char)((s) >> i))
2902 #define B1(s) ((unsigned char)(s))
2903
2904 #define MSB4(s,v) *(s)=B(v,24),(s)[1]=B(v,16), (s)[2]=B(v,8), (s)[3]=B1(v)
2905
2906
2907 int
2908 GetTapePos(long long *pos)
2909 {
2910 int err = 0;
2911 struct uscsi_cmd scmd;
2912 char buf[512];
2913 char parm[512 * 8];
2914 long lpos;
2915
2916 (void)memset((void *)buf, 0, sizeof(buf));
2917 (void)memset((void *)&scmd, 0, sizeof(scmd));
2918 scmd.uscsi_flags = USCSI_READ|USCSI_SILENT;
2919 scmd.uscsi_timeout = USCSI_TIMEOUT;
2920 scmd.uscsi_cdb = buf;
2921 scmd.uscsi_cdblen = CDB_GROUP1;
2922 buf[0] = 0x34; /* read position */
2923 buf[1] = 0;
2924 (void)memset((void *)parm, 0, 512);
2925 scmd.uscsi_bufaddr = parm;
2926 scmd.uscsi_buflen = 56;
2927 if (ioctl(fdsmtc, USCSICMD, &scmd) == -1) {
2928 err = errno;
2929 return err;
2930 }
2931 (void)memcpy(&lpos, &parm[4], sizeof(long));
2932 *pos = lpos;
2933 return err;
2934 }
2935
2936 int
2937 GotoTapePos(long long pos)
2938 {
2939 int err = 0;
2940 struct uscsi_cmd scmd;
2941 char buf[512];
2942 char parm[512 * 8];
2943 long lpos = (long)pos;
2944
2945 (void)memset((void *)buf, 0, sizeof(buf));
2946 (void)memset((void *)&scmd, 0, sizeof(scmd));
2947 scmd.uscsi_flags = USCSI_WRITE|USCSI_SILENT;
2948 scmd.uscsi_timeout = 360; /* 5 Minutes */
2949 scmd.uscsi_cdb = buf;
2950 scmd.uscsi_cdblen = CDB_GROUP1;
2951 buf[0] = 0x2b; /* locate */
2952 buf[1] = 0;
2953 MSB4(&buf[3], lpos);
2954 (void)memset((void *)parm, 0, 512);
2955 scmd.uscsi_bufaddr = NULL;
2956 scmd.uscsi_buflen = 0;
2957 if (ioctl(fdsmtc, USCSICMD, &scmd) == -1) {
2958 err = errno;
2959 return err;
2960 }
2961 return err;
2962 }
2963 #endif
2964
2965 #define LSEEK_GET_TAPEPOS 10
2966 #define LSEEK_GO2_TAPEPOS 11
2967
2968 #ifdef __linux__
2969 typedef struct mt_pos {
2970 short mt_op;
2971 int mt_count;
2972 } MTPosRec, *MTPosPtr;
2973
2974
2975 /*
2976 * get the current position of the tape
2977 */
2978 int
2979 GetTapePos(long long *pos)
2980 {
2981 int err = 0;
2982
2983 #ifdef RDUMP
2984 if (host) {
2985 *pos = (long long) rmtseek((OFF_T)0, (int)LSEEK_GET_TAPEPOS);
2986 err = *pos < 0;
2987 }
2988 else
2989 #endif
2990 {
2991 if (magtapein) {
2992 long mtpos;
2993 *pos = 0;
2994 err = (ioctl(mt, MTIOCPOS, &mtpos) < 0);
2995 *pos = (long long)mtpos;
2996 }
2997 else {
2998 *pos = LSEEK(mt, 0, SEEK_CUR);
2999 err = (*pos < 0);
3000 }
3001 }
3002 if (err) {
3003 err = errno;
3004 fprintf(stdout, "[%ld] error: %d (getting tapepos: %lld)\n",
3005 (unsigned long)getpid(), err, *pos);
3006 return err;
3007 }
3008 return err;
3009 }
3010
3011 /*
3012 * go to specified position on tape
3013 */
3014 int
3015 GotoTapePos(long long pos)
3016 {
3017 int err = 0;
3018
3019 #ifdef RDUMP
3020 if (host)
3021 err = (rmtseek((OFF_T)pos, (int)LSEEK_GO2_TAPEPOS) < 0);
3022 else
3023 #endif
3024 {
3025 if (magtapein) {
3026 struct mt_pos buf;
3027 buf.mt_op = MTSEEK;
3028 buf.mt_count = (int) pos;
3029 err = (ioctl(mt, MTIOCTOP, &buf) < 0);
3030 }
3031 else {
3032 pos = LSEEK(mt, pos, SEEK_SET);
3033 err = (pos < 0);
3034 }
3035 }
3036 if (err) {
3037 err = errno;
3038 fprintf(stdout, "[%ld] error: %d (setting tapepos: %lld)\n",
3039 (unsigned long)getpid(), err, pos);
3040 return err;
3041 }
3042 return err;
3043 }
3044 #endif /* __linux__ */
3045
3046 /*
3047 * read next data from tape to re-sync
3048 */
3049 void
3050 ReReadFromTape(void)
3051 {
3052 FLUSHTAPEBUF();
3053 noresyncmesg = 1;
3054 if (gethead(&spcl) == FAIL) {
3055 #ifdef DEBUG_QFA
3056 fprintf(stdout, "DEBUG 1 gethead failed\n");
3057 #endif
3058 }
3059 findinode(&spcl);
3060 noresyncmesg = 0;
3061 }
3062
3063 void
3064 ReReadInodeFromTape(dump_ino_t theino)
3065 {
3066 long cntloop = 0;
3067
3068 FLUSHTAPEBUF();
3069 noresyncmesg = 1;
3070 do {
3071 cntloop++;
3072 gethead(&spcl);
3073 } while (!(spcl.c_inumber == theino && spcl.c_type == TS_INODE && spcl.c_date == dumpdate));
3074 #ifdef DEBUG_QFA
3075 fprintf(stderr, "DEBUG: %ld reads\n", cntloop);
3076 fprintf(stderr, "DEBUG: bufsize %ld\n", bufsize);
3077 fprintf(stderr, "DEBUG: ntrec %ld\n", ntrec);
3078 fprintf(stderr, "DEBUG: %ld reads\n", cntloop);
3079 #endif
3080 findinode(&spcl);
3081 noresyncmesg = 0;
3082 }
3083
3084 #ifdef sunos
3085 int
3086 OpenSMTCmt(char *themagtape)
3087 {
3088 if (GetSCSIIDFromPath(themagtape, &scsiid)) {
3089 fprintf(stderr, "can't get SCSI-ID for %s\n", themagtape);
3090 return -1;
3091 }
3092 if (scsiid < 0) {
3093 fprintf(stderr, "can't get SCSI-ID for %s\n", themagtape);
3094 return -1;
3095 }
3096 sprintf(smtcpath, "/dev/rsmtc%ld,0", scsiid);
3097 if ((fdsmtc = open(smtcpath, O_RDWR)) == -1) {
3098 fprintf(stderr, "can't open smtc device: %s, %d\n", smtcpath, errno);
3099 return -1;
3100 }
3101 return 0;
3102 }
3103 #endif /* sunos */
3104 #endif /* USE_QFA */
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