Fix fgets bug when asking for a tape name.
[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> - AlcĂ´ve <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 1.102 2011/06/08 15:40:53 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 #include <sys/socket.h>
65 #include <sys/un.h>
66
67 #ifdef __linux__
68 #include <sys/time.h>
69 #include <time.h>
70 #ifdef HAVE_EXT2FS_EXT2_FS_H
71 #include <ext2fs/ext2_fs.h>
72 #else
73 #include <linux/ext2_fs.h>
74 #endif
75 #include <ext2fs/ext2fs.h>
76 #include <bsdcompat.h>
77 #else /* __linux__ */
78 #ifdef sunos
79 #define quad_t int64_t
80 #include <sys/time.h>
81 #include <sys/fcntl.h>
82 #include <bsdcompat.h>
83 #else
84 #include <ufs/ufs/dinode.h>
85 #endif
86 #endif /* __linux__ */
87 #ifdef DUMP_MACOSX
88 #include "darwin.h"
89 #endif
90 #include <protocols/dumprestore.h>
91
92 #ifdef HAVE_ZLIB
93 #include <zlib.h>
94 #endif /* HAVE_ZLIB */
95
96 #ifdef HAVE_BZLIB
97 #include <bzlib.h>
98 #endif /* HAVE_BZLIB */
99
100 #ifdef HAVE_LZO
101 #include <minilzo.h>
102 #endif /* HAVE_LZO */
103
104 #include "restore.h"
105 #include "extern.h"
106 #include "pathnames.h"
107
108 #ifdef USE_QFA
109 int noresyncmesg = 0;
110 #endif /* USE_QFA */
111 static long fssize = MAXBSIZE;
112 static int mt = -1;
113 int pipein = 0;
114 static int magtapein = 0; /* input is from magtape */
115 static char magtape[MAXPATHLEN];
116 static char magtapeprefix[MAXPATHLEN];
117 static int blkcnt;
118 static int numtrec;
119 static char *tapebuf; /* input buffer for read */
120 static int bufsize; /* buffer size without prefix */
121 static char *tbufptr = NULL; /* active tape buffer */
122 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
123 static char *comprbuf; /* uncompress work buf */
124 static size_t comprlen; /* size including prefix */
125 #endif
126 static union u_spcl endoftapemark;
127 static long blksread; /* blocks read since last header */
128 static long tpblksread = 0; /* TP_BSIZE blocks read */
129 static long tapesread;
130 static sigjmp_buf restart;
131 static int gettingfile = 0; /* restart has a valid frame */
132 char *host = NULL;
133
134 static int ofile;
135 static char *map;
136 static char lnkbuf[MAXPATHLEN + 1];
137 static int pathlen;
138
139 int oldinofmt; /* old inode format conversion required */
140 int Bcvt; /* Swap Bytes (for CCI or sun) */
141 static int Qcvt; /* Swap quads (for sun) */
142
143 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
144
145 static void accthdr __P((struct s_spcl *));
146 static int checksum __P((int *));
147 static void findinode __P((struct s_spcl *));
148 static void findtapeblksize __P((void));
149 static int gethead __P((struct s_spcl *));
150 static int converthead __P((struct s_spcl *));
151 static void converttapebuf __P((struct tapebuf *));
152 static void readtape __P((char *));
153 static void setdumpnum __P((void));
154 #ifdef DUMP_MACOSX
155 static void xtrfilefinderinfo __P((char *, size_t));
156 #endif
157
158 static u_int swabi __P((u_int));
159 #if 0
160 static u_long swabl __P((u_long));
161 #endif
162 static u_char *swab64 __P((u_char *, int));
163 static u_char *swab32 __P((u_char *, int));
164 static u_char *swab16 __P((u_char *, int));
165 static void terminateinput __P((void));
166 static void xtrfile __P((char *, size_t));
167 static void xtrlnkfile __P((char *, size_t));
168 static void xtrlnkskip __P((char *, size_t));
169 static void xtrmap __P((char *, size_t));
170 static void xtrmapskip __P((char *, size_t));
171 static void xtrskip __P((char *, size_t));
172 static void xtrxattr __P((char *, size_t));
173 static void setmagtapein __P((void));
174 static int extractattr __P((char *));
175 static void compareattr __P((char *));
176
177 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
178 static void newcomprbuf __P((int));
179 static void (*readtape_func) __P((char *));
180 static void readtape_set __P((char *));
181 static void readtape_uncompr __P((char *));
182 static void readtape_comprfile __P((char *));
183 static void readtape_comprtape __P((char *));
184 static char *decompress_tapebuf __P((struct tapebuf *, int));
185 static void msg_read_error __P((char *));
186 #endif
187 static int read_a_block __P((int, char *, size_t, long *));
188 #define PREFIXSIZE sizeof(struct tapebuf)
189
190 #define COMPARE_ONTHEFLY 1
191
192 #if COMPARE_ONTHEFLY
193 static int ifile; /* input file for compare */
194 static int cmperror; /* compare error */
195 static void xtrcmpfile __P((char *, size_t));
196 static void xtrcmpskip __P((char *, size_t));
197 #endif
198
199 static int readmapflag;
200 static int readingmaps; /* set to 1 while reading the maps */
201
202 static char xattrbuf[XATTR_MAXSIZE];
203 static int xattrlen;
204
205 #ifdef DUMP_MACOSX
206 static DumpFinderInfo gFndrInfo;
207 #endif
208
209 /*
210 * Set up an input source. This is called from main.c before setup() is.
211 */
212 void
213 setinput(char *source)
214 {
215 int i;
216 char *n;
217
218 FLUSHTAPEBUF();
219 if (bflag)
220 newtapebuf(ntrec);
221 else
222 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
223 terminal = stdin;
224
225 #ifdef RRESTORE
226 if ((n = strchr(source, ':'))) {
227 for (i = 0; i < (n - source); i++) {
228 if (source[i] == '/')
229 break;
230 }
231 if (source[i] != '/') {
232 host = source;
233 source = strchr(host, ':');
234 *source++ = '\0';
235 if (rmthost(host) == 0)
236 exit(1);
237 }
238 } else
239 #endif
240 if (strcmp(source, "-") == 0) {
241 /*
242 * Since input is coming from a pipe we must establish
243 * our own connection to the terminal.
244 */
245 terminal = fopen(_PATH_TTY, "r");
246 if (terminal == NULL) {
247 warn("cannot open %s", _PATH_TTY);
248 terminal = fopen(_PATH_DEVNULL, "r");
249 if (terminal == NULL)
250 err(1, "cannot open %s", _PATH_DEVNULL);
251 }
252 pipein++;
253 }
254 setuid(getuid()); /* no longer need or want root privileges */
255 if (Mflag) {
256 strncpy(magtapeprefix, source, MAXPATHLEN);
257 magtapeprefix[MAXPATHLEN-1] = '\0';
258 snprintf(magtape, MAXPATHLEN, "%s%03d", source, 1);
259 }
260 else
261 strncpy(magtape, source, MAXPATHLEN);
262 magtape[MAXPATHLEN - 1] = '\0';
263 }
264
265 void
266 newtapebuf(long size)
267 {
268 static int tapebufsize = -1;
269
270 ntrec = size;
271 bufsize = ntrec * TP_BSIZE;
272 if (size <= tapebufsize)
273 return;
274 if (tapebuf != NULL)
275 free(tapebuf);
276 tapebuf = malloc(size * TP_BSIZE + sizeof(struct tapebuf));
277 if (tapebuf == NULL)
278 errx(1, "Cannot allocate space for tape buffer");
279 tapebufsize = size;
280 }
281
282 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
283 static void
284 newcomprbuf(int size)
285 {
286 size_t buf_size = (size+1) * TP_BSIZE + sizeof(struct tapebuf);
287 if (buf_size <= comprlen)
288 return;
289 comprlen = buf_size;
290 if (comprbuf != NULL)
291 free(comprbuf);
292 comprbuf = malloc(comprlen);
293 if (comprbuf == NULL)
294 errx(1, "Cannot allocate space for decompress buffer");
295 }
296 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
297
298 /*
299 * Verify that the tape drive can be accessed and
300 * that it actually is a dump tape.
301 */
302 void
303 setup(void)
304 {
305 int i, j, *ip, bot_code;
306 struct STAT stbuf;
307 char *temptape;
308
309 Vprintf(stdout, "Verify tape and initialize maps\n");
310 if (Afile == NULL && bot_script) {
311 msg("Launching %s\n", bot_script);
312 bot_code = system_command(bot_script, magtape, 1);
313 if (bot_code != 0 && bot_code != 1) {
314 msg("Restore aborted by the beginning of tape script\n");
315 exit(1);
316 }
317 }
318
319 if (Afile)
320 temptape = Afile;
321 else
322 temptape = magtape;
323
324 #ifdef RRESTORE
325 if (!Afile && host)
326 mt = rmtopen(temptape, O_RDONLY);
327 else
328 #endif
329 if (pipein)
330 mt = 0;
331 else
332 mt = OPEN(temptape, O_RDONLY, 0);
333 if (mt < 0)
334 err(1, "%s", temptape);
335 if (!Afile) {
336 volno = 1;
337 setmagtapein();
338 setdumpnum();
339 }
340 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
341 readtape_func = readtape_set;
342 #if defined(HAVE_LZO)
343 if (lzo_init() != LZO_E_OK) {
344 msg("internal error - lzo_init failed \n");
345 exit(1);
346 }
347 #endif
348 #endif
349 FLUSHTAPEBUF();
350 findtapeblksize();
351 cvtflag = 0;
352 if (gethead(&spcl) == FAIL) {
353 blkcnt--; /* push back this block */
354 blksread--;
355 tpblksread--;
356 cvtflag++;
357 if (gethead(&spcl) == FAIL)
358 errx(1, "Tape is not a dump tape");
359 fprintf(stderr, "Converting to new file system format.\n");
360 }
361
362 if (zflag) {
363 fprintf(stderr, "Dump tape is compressed.\n");
364 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB) && !defined(HAVE_LZO)
365 errx(1,"This restore version doesn't support decompression");
366 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
367 }
368 if (pipein) {
369 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC;
370 endoftapemark.s_spcl.c_type = TS_END;
371 ip = (int *)&endoftapemark;
372 j = sizeof(union u_spcl) / sizeof(int);
373 i = 0;
374 do
375 i += *ip++;
376 while (--j);
377 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
378 }
379 if (vflag || command == 't' || command == 'C')
380 printdumpinfo();
381 #ifdef USE_QFA
382 if (tapeposflag && (unsigned long)spcl.c_date != qfadumpdate)
383 errx(1, "different QFA/dumpdates detected\n");
384 #endif
385 if (filesys[0] == '\0') {
386 char *dirptr;
387 strncpy(filesys, spcl.c_filesys, NAMELEN);
388 filesys[NAMELEN - 1] = '\0';
389 dirptr = strstr(filesys, " (dir");
390 if (dirptr != NULL)
391 *dirptr = '\0';
392 }
393 dumptime = spcl.c_ddate;
394 dumpdate = spcl.c_date;
395 if (STAT(".", &stbuf) < 0)
396 err(1, "cannot stat .");
397 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
398 fssize = TP_BSIZE;
399 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
400 fssize = stbuf.st_blksize;
401 if (((fssize - 1) & fssize) != 0)
402 errx(1, "bad block size %ld", fssize);
403 if (spcl.c_volume != 1)
404 errx(1, "Tape is not volume 1 of the dump");
405 if (gethead(&spcl) == FAIL) {
406 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
407 panic("no header after volume mark!\n");
408 }
409 readingmaps = 1;
410 findinode(&spcl);
411 if (spcl.c_type != TS_CLRI)
412 errx(1, "Cannot find file removal list");
413 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
414 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
415 if (map == NULL)
416 errx(1, "no memory for active inode map");
417 usedinomap = map;
418 curfile.action = USING;
419 getfile(xtrmap, xtrmapskip);
420 while (spcl.c_type == TS_ADDR) {
421 /* Recompute maxino and the map */
422 dump_ino_t oldmaxino = maxino;
423 maxino += (spcl.c_count * TP_BSIZE * NBBY) + 1;
424 resizemaps(oldmaxino, maxino);
425 map = usedinomap;
426
427 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
428 getfile(xtrmap, xtrmapskip);
429 }
430 Dprintf(stdout, "maxino = %lu\n", (unsigned long)maxino);
431 if (spcl.c_type != TS_BITS) {
432 if (spcl.c_type == TS_END) {
433 msg("Cannot find file dump list, assuming empty tape\n");
434 exit(0);
435 }
436 errx(1, "Cannot find file dump list");
437 }
438 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
439 if (map == (char *)NULL)
440 errx(1, "no memory for file dump list");
441 dumpmap = map;
442 curfile.action = USING;
443 getfile(xtrmap, xtrmapskip);
444 while (spcl.c_type == TS_ADDR) {
445 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
446 getfile(xtrmap, xtrmapskip);
447 }
448 /*
449 * If there may be whiteout entries on the tape, pretend that the
450 * whiteout inode exists, so that the whiteout entries can be
451 * extracted.
452 */
453 if (oldinofmt == 0)
454 SETINO(WINO, dumpmap);
455 readingmaps = 0;
456 findinode(&spcl);
457 }
458
459 /*
460 * Prompt user to load a new dump volume.
461 * "Nextvol" is the next suggested volume to use.
462 * This suggested volume is enforced when doing full
463 * or incremental restores, but can be overridden by
464 * the user when only extracting a subset of the files.
465 */
466 void
467 getvol(long nextvol)
468 {
469 long newvol = 0, wantnext = 0, i;
470 long saved_blksread = 0, saved_tpblksread = 0;
471 union u_spcl tmpspcl;
472 # define tmpbuf tmpspcl.s_spcl
473 char buf[TP_BSIZE];
474 int haderror = 0, bot_code = 1;
475
476 if (nextvol == 1) {
477 tapesread = 0;
478 gettingfile = 0;
479 blksread = 0;
480 }
481 if (pipein) {
482 if (nextvol != 1)
483 panic("Changing volumes on pipe input?\n");
484 if (volno == 1)
485 return;
486 goto gethdr;
487 }
488 saved_blksread = blksread;
489 saved_tpblksread = tpblksread;
490 #if defined(USE_QFA) && defined(sunos)
491 if (createtapeposflag || tapeposflag)
492 close(fdsmtc);
493 #endif
494 again:
495 if (pipein)
496 exit(1); /* pipes do not get a second chance */
497 if (aflag || curfile.action != SKIP) {
498 newvol = nextvol;
499 wantnext = 1;
500 } else {
501 newvol = 0;
502 wantnext = 0;
503 }
504 while (newvol <= 0) {
505 if (tapesread == 0) {
506 fprintf(stderr, "%s%s%s%s%s",
507 "You have not read any volumes yet.\n",
508 "Unless you know which volume your",
509 " file(s) are on you should start\n",
510 "with the last volume and work",
511 " towards the first.\n");
512 } else {
513 fprintf(stderr, "You have read volumes");
514 strcpy(buf, ": ");
515 for (i = 1; i < 32; i++)
516 if (tapesread & (1 << i)) {
517 fprintf(stderr, "%s%ld", buf, (long)i);
518 strcpy(buf, ", ");
519 }
520 fprintf(stderr, "\n");
521 }
522 do {
523 fprintf(stderr, "Specify next volume # (none if no more volumes): ");
524 (void) fflush(stderr);
525 if (!fgets(buf, TP_BSIZE, terminal))
526 break;
527 } while (!feof(terminal) && buf[0] == '\n');
528 if (feof(terminal))
529 exit(1);
530 if (!strcmp(buf, "none\n")) {
531 terminateinput();
532 return;
533 }
534 newvol = atoi(buf);
535 if (newvol <= 0) {
536 fprintf(stderr,
537 "Volume numbers are positive numerics\n");
538 }
539 }
540 if (newvol == volno) {
541 tapesread |= 1 << volno;
542 #if defined(USE_QFA) && defined(sunos)
543 if (createtapeposflag || tapeposflag) {
544 if (OpenSMTCmt(magtape) < 0) {
545 volno = -1;
546 haderror = 1;
547 goto again;
548 }
549 }
550 #endif /* USE_QFA */
551 return;
552 }
553 closemt();
554
555 /*
556 * if using an archive file, reset its name so readtape()
557 * could properly use remote access.
558 */
559 Afile = NULL;
560
561 if (Mflag) {
562 snprintf(magtape, MAXPATHLEN, "%s%03ld", magtapeprefix, newvol);
563 magtape[MAXPATHLEN - 1] = '\0';
564 }
565 if (bot_script && !haderror) {
566 msg("Launching %s\n", bot_script);
567 bot_code = system_command(bot_script, magtape, newvol);
568 if (bot_code != 0 && bot_code != 1) {
569 msg("Restore aborted by the beginning of tape script\n");
570 exit(1);
571 }
572 }
573 if (haderror || (bot_code && !Mflag)) {
574 haderror = 0;
575 if (compare_errors)
576 fprintf(stderr, "%d compare errors so far\n", compare_errors);
577 #ifdef sunos
578 fprintf(stderr, "Mount volume %ld\n", (long)newvol);
579 #else
580 fprintf(stderr, "Mount tape volume %ld\n", (long)newvol);
581 #endif
582 fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
583 #ifdef sunos
584 fprintf(stderr, "then enter volume name (default: %s) ", magtape);
585 #else
586 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
587 #endif
588 (void) fflush(stderr);
589 if (!fgets(buf, TP_BSIZE, terminal))
590 exit(1);
591 if (feof(terminal))
592 exit(1);
593 if (!strcmp(buf, "none\n")) {
594 terminateinput();
595 return;
596 }
597 if (buf[0] != '\n') {
598 char *pos;
599 (void) strncpy(magtape, buf, sizeof(magtape));
600 magtape[sizeof(magtape) - 1] = '\0';
601 if ((pos = strchr(magtape, '\n')))
602 magtape[pos - magtape] = '\0';
603 }
604 }
605 #if defined(USE_QFA) && defined(sunos)
606 if (createtapeposflag || tapeposflag) {
607 if (OpenSMTCmt(magtape) < 0) {
608 volno = -1;
609 haderror = 1;
610 goto again;
611 }
612 }
613 #endif /* USE_QFA */
614 #ifdef RRESTORE
615 if (host)
616 mt = rmtopen(magtape, O_RDONLY);
617 else
618 #endif
619 mt = OPEN(magtape, O_RDONLY, 0);
620
621 if (mt == -1) {
622 fprintf(stderr, "Cannot open %s\n", magtape);
623 volno = -1;
624 haderror = 1;
625 goto again;
626 }
627 gethdr:
628 setmagtapein();
629 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
630 readtape_func = readtape_set;
631 #endif
632 volno = newvol;
633 setdumpnum();
634 FLUSHTAPEBUF();
635 findtapeblksize();
636 if (gethead(&tmpbuf) == FAIL) {
637 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
638 fprintf(stderr, "tape is not dump tape\n");
639 volno = 0;
640 haderror = 1;
641 blksread = saved_blksread;
642 tpblksread = saved_tpblksread;
643 goto again;
644 }
645 if (tmpbuf.c_volume != volno) {
646 fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume);
647 volno = 0;
648 haderror = 1;
649 blksread = saved_blksread;
650 tpblksread = saved_tpblksread;
651 goto again;
652 }
653 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
654 fprintf(stderr, "Wrong dump date\n\tgot: %s",
655 #ifdef sunos
656 ctime(&tmpbuf.c_date));
657 #else
658 ctime4(&tmpbuf.c_date));
659 #endif
660 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
661 volno = 0;
662 haderror = 1;
663 blksread = saved_blksread;
664 tpblksread = saved_tpblksread;
665 goto again;
666 }
667 tapesread |= 1 << volno;
668 /*
669 * If continuing from the previous volume, skip over any
670 * blocks read already at the end of the previous volume.
671 *
672 * If coming to this volume at random, skip to the beginning
673 * of the next record.
674 */
675 if (zflag) {
676 fprintf(stderr, "Dump tape is compressed.\n");
677 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB) && !defined(HAVE_LZO)
678 errx(1,"This restore version doesn't support decompression");
679 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
680 }
681 Dprintf(stdout, "read %ld recs, tape starts with %ld\n",
682 tpblksread - 1, (long)tmpbuf.c_firstrec);
683 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
684 if (!wantnext) {
685 tpblksread = tmpbuf.c_firstrec + 1;
686 for (i = tmpbuf.c_count; i > 0; i--)
687 readtape(buf);
688 } else if (tmpbuf.c_firstrec > 0 &&
689 tmpbuf.c_firstrec < tpblksread - 1) {
690 /*
691 * -1 since we've read the volume header
692 */
693 i = tpblksread - tmpbuf.c_firstrec - 1;
694 Dprintf(stderr, "Skipping %ld duplicate record%s.\n",
695 (long)i, i > 1 ? "s" : "");
696 while (--i >= 0)
697 readtape(buf);
698 }
699 }
700 if (curfile.action == USING) {
701 if (volno == 1)
702 panic("active file into volume 1\n");
703 return;
704 }
705 /*
706 * Skip up to the beginning of the next record
707 */
708 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
709 for (i = tmpbuf.c_count; i > 0; i--)
710 readtape(buf);
711 (void) gethead(&spcl);
712 findinode(&spcl);
713 if (gettingfile) {
714 gettingfile = 0;
715 siglongjmp(restart, 1);
716 }
717 }
718
719 /*
720 * Handle unexpected EOF.
721 */
722 static void
723 terminateinput(void)
724 {
725
726 if (gettingfile && curfile.action == USING) {
727 printf("Warning: %s %s\n",
728 "End-of-input encountered while extracting", curfile.name);
729 }
730 curfile.name = "<name unknown>";
731 curfile.action = UNKNOWN;
732 curfile.dip = NULL;
733 curfile.ino = maxino;
734 if (gettingfile) {
735 gettingfile = 0;
736 siglongjmp(restart, 1);
737 }
738 }
739
740 /*
741 * handle multiple dumps per tape by skipping forward to the
742 * appropriate one.
743 */
744 static void
745 setdumpnum(void)
746 {
747 struct mtop tcom;
748
749 if (dumpnum == 1 || volno != 1)
750 return;
751 if (pipein)
752 errx(1, "Cannot have multiple dumps on pipe input");
753 tcom.mt_op = MTFSF;
754 tcom.mt_count = dumpnum - 1;
755 #ifdef RRESTORE
756 if (host) {
757 if (rmtioctl(MTFSF, dumpnum - 1) < 0) {
758 fprintf(stderr, "rmtioctl MTFSF: %s\n", strerror(errno));
759 exit(1);
760 }
761 } else
762 #endif
763 if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0) {
764 fprintf(stderr, "rmtioctl MTFSF: %s\n", strerror(errno));
765 exit(1);
766 /* warn("ioctl MTFSF"); */
767 }
768 }
769
770 void
771 printdumpinfo(void)
772 {
773 #ifdef sunos
774 Vprintf(stdout, "Dump date: %s", ctime(&spcl.c_date));
775 Vprintf(stdout, "Dumped from: %s",
776 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&spcl.c_ddate));
777 if (spcl.c_host[0] == '\0')
778 return;
779 Vprintf(stdout, "Level %d dump of %s on %s:%s\n",
780 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
781 Vprintf(stdout, "Label: %s\n", spcl.c_label);
782 #else
783 fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date));
784 fprintf(stdout, "Dumped from: %s",
785 (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate));
786 if (spcl.c_host[0] == '\0')
787 return;
788 fprintf(stdout, "Level %d dump of %s on %s:%s\n",
789 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
790 fprintf(stdout, "Label: %s\n", spcl.c_label);
791 #endif
792 }
793
794 void
795 printvolinfo(void)
796 {
797 int i;
798
799 if (volinfo[1] == ROOTINO) {
800 printf("Starting inode numbers by volume:\n");
801 for (i = 1; i < (int)TP_NINOS && volinfo[i] != 0; ++i)
802 printf("\tVolume %d: %lu\n", i, (unsigned long)volinfo[i]);
803 }
804 }
805
806
807 int
808 extractfile(struct entry *ep, int doremove)
809 {
810 unsigned int flags;
811 mode_t mode;
812 struct timeval timep[2];
813 char *name = myname(ep);
814
815 /* If removal is requested (-r mode) do remove it unless
816 * we are extracting a metadata only inode */
817 if (spcl.c_flags & DR_METAONLY) {
818 Vprintf(stdout, "file %s is metadata only\n", name);
819 }
820 else {
821 if (doremove) {
822 removeleaf(ep);
823 ep->e_flags &= ~REMOVED;
824 }
825 }
826
827 curfile.name = name;
828 curfile.action = USING;
829 #if defined(__linux__) || defined(sunos)
830 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
831 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
832 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
833 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
834 #else /* __linux__ || sunos */
835 timep[0].tv_sec = curfile.dip->di_atime;
836 timep[0].tv_usec = curfile.dip->di_atimensec / 1000;
837 timep[1].tv_sec = curfile.dip->di_mtime;
838 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000;
839 #endif /* __linux__ */
840 mode = curfile.dip->di_mode;
841 flags = curfile.dip->di_flags;
842 switch (mode & IFMT) {
843
844 default:
845 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
846 skipfile();
847 return (FAIL);
848
849 case IFSOCK:
850 {
851 uid_t luid = curfile.dip->di_uid;
852 gid_t lgid = curfile.dip->di_gid;
853
854 Vprintf(stdout, "extract socket %s\n", name);
855 skipfile();
856 if (Nflag)
857 return (GOOD);
858 if (! (spcl.c_flags & DR_METAONLY)) {
859 int sk;
860 struct sockaddr_un addr;
861
862 if (uflag)
863 (void)unlink(name);
864
865 if ((sk = socket(AF_UNIX, SOCK_DGRAM, 0)) < 0) {
866 warn("%s: cannot create socket", name);
867 return (FAIL);
868 }
869 addr.sun_family = AF_UNIX;
870 strcpy(addr.sun_path, name);
871 if (bind(sk, (const struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0) {
872 warn("%s: cannot create socket", name);
873 return (FAIL);
874 }
875 close(sk);
876 }
877 if (chown(name, luid, lgid) < 0)
878 warn("%s: chown", name);
879 if (chmod(name, mode) < 0)
880 warn("%s: chmod", name);
881 extractattr(name);
882 utimes(name, timep);
883 if (flags)
884 #ifdef __linux__
885 (void) lsetflags(name, flags);
886 #else
887 #ifdef sunos
888 {
889 warn("%s: cannot call chflags", name);
890 /* (void) chflags(name, flags); */
891 }
892 #else
893 (void) chflags(name, flags);
894 #endif
895 #endif
896 return (GOOD);
897 }
898
899 case IFDIR:
900 {
901 int ret;
902 if (mflag) {
903 if (ep == NULL || ep->e_flags & EXTRACT)
904 panic("unextracted directory %s\n", name);
905 skipfile();
906 return (GOOD);
907 }
908 Vprintf(stdout, "extract dir %s\n", name);
909 ret = genliteraldir(name, curfile.ino);
910 extractattr(name);
911 return ret;
912 }
913
914 case IFLNK:
915 {
916 #ifdef HAVE_LCHOWN
917 uid_t luid = curfile.dip->di_uid;
918 gid_t lgid = curfile.dip->di_gid;
919 #endif
920 if (! (spcl.c_flags & DR_METAONLY)) {
921 lnkbuf[0] = '\0';
922 pathlen = 0;
923 getfile(xtrlnkfile, xtrlnkskip);
924 if (pathlen == 0) {
925 Vprintf(stdout,
926 "%s: zero length symbolic link (ignored)\n", name);
927 return (GOOD);
928 }
929 if (linkit(lnkbuf, name, SYMLINK) == FAIL)
930 return (FAIL);
931 }
932 else
933 skipfile();
934
935 #ifdef HAVE_LCHOWN
936 if (lchown(name, luid, lgid) < 0)
937 warn("%s: lchown", name);
938 #endif
939 extractattr(name);
940 return (GOOD);
941 }
942
943 case IFIFO:
944 {
945 uid_t luid = curfile.dip->di_uid;
946 gid_t lgid = curfile.dip->di_gid;
947
948 Vprintf(stdout, "extract fifo %s\n", name);
949 skipfile();
950 if (Nflag)
951 return (GOOD);
952 if (! (spcl.c_flags & DR_METAONLY)) {
953 if (uflag && !Nflag)
954 (void)unlink(name);
955 if (mkfifo(name, mode) < 0) {
956 warn("%s: cannot create fifo", name);
957 return (FAIL);
958 }
959 }
960 if (chown(name, luid, lgid) < 0)
961 warn("%s: chown", name);
962 if (chmod(name, mode) < 0)
963 warn("%s: chmod", name);
964 extractattr(name);
965 utimes(name, timep);
966 if (flags)
967 #ifdef __linux__
968 (void) lsetflags(name, flags);
969 #else
970 #ifdef sunos
971 {
972 warn("%s: cannot call chflags", name);
973 /* (void) chflags(name, flags); */
974 }
975 #else
976 (void) chflags(name, flags);
977 #endif
978 #endif
979 return (GOOD);
980 }
981 case IFCHR:
982 case IFBLK:
983 {
984 uid_t luid = curfile.dip->di_uid;
985 gid_t lgid = curfile.dip->di_gid;
986 int lrdev = (int)curfile.dip->di_rdev;
987
988 Vprintf(stdout, "extract special file %s\n", name);
989 skipfile();
990 if (Nflag)
991 return (GOOD);
992 if (! (spcl.c_flags & DR_METAONLY)) {
993 if (uflag)
994 (void)unlink(name);
995 if (mknod(name, mode, lrdev) < 0) {
996 warn("%s: cannot create special file", name);
997 return (FAIL);
998 }
999 }
1000 if (chown(name, luid, lgid) < 0)
1001 warn("%s: chown", name);
1002 if (chmod(name, mode) < 0)
1003 warn("%s: chmod", name);
1004 extractattr(name);
1005 utimes(name, timep);
1006 if (flags)
1007 #ifdef __linux__
1008 {
1009 warn("%s: lsetflags called on a special file", name);
1010 (void) lsetflags(name, flags);
1011 }
1012 #else
1013 #ifdef sunos
1014 {
1015 warn("%s: cannot call chflags on a special file", name);
1016 /* (void) chflags(name, flags); */
1017 }
1018 #else
1019 {
1020 warn("%s: chflags called on a special file", name);
1021 (void) chflags(name, flags);
1022 }
1023 #endif
1024 #endif
1025 return (GOOD);
1026 }
1027 case IFREG:
1028 {
1029 uid_t luid = curfile.dip->di_uid;
1030 gid_t lgid = curfile.dip->di_gid;
1031
1032 Vprintf(stdout, "extract file %s\n", name);
1033 if (Nflag) {
1034 skipfile();
1035 return (GOOD);
1036 }
1037 if (! (spcl.c_flags & DR_METAONLY)) {
1038 if (uflag)
1039 (void)unlink(name);
1040 if ((ofile = OPEN(name, O_WRONLY | O_CREAT | O_TRUNC,
1041 0666)) < 0) {
1042 warn("%s: cannot create file", name);
1043 skipfile();
1044 return (FAIL);
1045 }
1046 getfile(xtrfile, xtrskip);
1047 (void) close(ofile);
1048 }
1049 else
1050 skipfile();
1051 if (chown(name, luid, lgid) < 0)
1052 warn("%s: chown", name);
1053 if (chmod(name, mode) < 0)
1054 warn("%s: chmod", name);
1055 extractattr(name);
1056 utimes(name, timep);
1057 if (flags)
1058 #ifdef __linux__
1059 (void) lsetflags(name, flags);
1060 #else
1061 #ifdef sunos
1062 {
1063 warn("%s: cannot call chflags", name);
1064 /* (void) chflags(name, flags); */
1065 }
1066 #else
1067 (void) chflags(name, flags);
1068 #endif
1069 #endif
1070 return (GOOD);
1071 }
1072 }
1073 /* NOTREACHED */
1074 }
1075
1076 static int
1077 extractattr(char *path)
1078 {
1079 while (spcl.c_flags & DR_EXTATTRIBUTES) {
1080 switch (spcl.c_extattributes) {
1081 case EXT_MACOSFNDRINFO:
1082 #ifdef DUMP_MACOSX
1083 (void)extractfinderinfoufs(path);
1084 #else
1085 msg("MacOSX not supported in this version, skipping\n");
1086 skipfile();
1087 #endif
1088 break;
1089 case EXT_MACOSRESFORK:
1090 #ifdef DUMP_MACOSX
1091 (void)extractresourceufs(path);
1092 #else
1093 msg("MacOSX not supported in this version, skipping\n");
1094 skipfile();
1095 #endif
1096 break;
1097 case EXT_XATTR: {
1098 char xattr[XATTR_MAXSIZE];
1099
1100 if (readxattr(xattr) == GOOD) {
1101 xattr_extract(path, xattr);
1102 break;
1103 }
1104 }
1105 default:
1106 msg("unexpected inode extension %ld, skipping\n", spcl.c_extattributes);
1107 skipfile();
1108 break;
1109 }
1110 }
1111 return GOOD;
1112 }
1113
1114 #ifdef DUMP_MACOSX
1115 int
1116 extractfinderinfoufs(char *name)
1117 {
1118 int err;
1119 char oFileRsrc[MAXPATHLEN];
1120 int flags;
1121 mode_t mode;
1122 struct timeval timep[2];
1123 u_int32_t uid;
1124 u_int32_t gid;
1125 char path[MAXPATHLEN], fname[MAXPATHLEN];
1126
1127 curfile.name = name;
1128 curfile.action = USING;
1129 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
1130 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
1131 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
1132 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
1133 mode = curfile.dip->di_mode;
1134 flags = curfile.dip->di_flags;
1135 uid = curfile.dip->di_uid;
1136 gid = curfile.dip->di_gid;
1137
1138 switch (mode & IFMT) {
1139
1140 default:
1141 fprintf(stderr, "%s: (extr. finfoufs) unknown file mode 0%o\n", name, mode);
1142 skipfile();
1143 return (FAIL);
1144
1145 case IFDIR:
1146 fprintf(stderr, "%s: (extr. finfoufs[IFDIR]) unknown file mode 0%o\n", name, mode);
1147 skipfile();
1148 return (FAIL);
1149
1150 case IFLNK:
1151 skipfile();
1152 return (GOOD);
1153
1154 case IFREG:
1155 Vprintf(stdout, "extract finderinfo file %s\n", name);
1156 if (Nflag) {
1157 skipfile();
1158 return (GOOD);
1159 }
1160 getfile(xtrfilefinderinfo, xtrskip);
1161
1162 GetPathFile(name, path, fname);
1163 strcpy(oFileRsrc, path);
1164 strcat(oFileRsrc, "._");
1165 strcat(oFileRsrc, fname);
1166
1167 if ((err = CreateAppleDoubleFileRes(oFileRsrc, &gFndrInfo.fndrinfo,
1168 mode, flags, timep, uid, gid)) != 0) {
1169 fprintf(stderr, "%s: cannot create finderinfo: %s\n",
1170 name, strerror(errno));
1171 skipfile();
1172 return (FAIL);
1173 }
1174 return (GOOD);
1175 }
1176 /* NOTREACHED */
1177 }
1178
1179
1180 int
1181 extractresourceufs(char *name)
1182 {
1183 char oFileRsrc[MAXPATHLEN];
1184 int flags;
1185 mode_t mode;
1186 struct timeval timep[2];
1187 char path[MAXPATHLEN], fname[MAXPATHLEN];
1188 ASDHeaderPtr hp;
1189 ASDEntryPtr ep;
1190 u_long loff;
1191 u_int32_t uid;
1192 u_int32_t gid;
1193 u_int64_t di_size;
1194 char *p;
1195 char buf[1024];
1196
1197 curfile.name = name;
1198 curfile.action = USING;
1199 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
1200 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
1201 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
1202 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
1203 mode = curfile.dip->di_mode;
1204 flags = curfile.dip->di_flags;
1205 uid = curfile.dip->di_uid;
1206 gid = curfile.dip->di_gid;
1207 di_size = curfile.dip->di_size;
1208
1209 switch (mode & IFMT) {
1210
1211 default:
1212 fprintf(stderr, "%s: (extr. resufs) unknown file mode 0%o\n", name, mode);
1213 skipfile();
1214 return (FAIL);
1215
1216 case IFDIR:
1217 fprintf(stderr, "%s: (extr. resufs [IFDIR]) unknown file mode 0%o\n", name, mode);
1218 skipfile();
1219 return (FAIL);
1220
1221 case IFLNK:
1222 skipfile();
1223 return (GOOD);
1224
1225 case IFREG:
1226 Vprintf(stdout, "extract resource file %s\n", name);
1227 if (Nflag) {
1228 skipfile();
1229 return (GOOD);
1230 }
1231
1232 GetPathFile(name, path, fname);
1233 strcpy(oFileRsrc, path);
1234 strcat(oFileRsrc, "._");
1235 strcat(oFileRsrc, fname);
1236
1237 if ((ofile = open(oFileRsrc, O_RDONLY, 0)) < 0) {
1238 fprintf(stderr, "%s: cannot read finderinfo: %s\n",
1239 name, strerror(errno));
1240 skipfile();
1241 return (FAIL);
1242 }
1243 read(ofile, buf, 70);
1244 (void) close(ofile);
1245 p = buf;
1246 hp = (ASDHeaderPtr)p;
1247 /* the header */
1248 hp->entries++;
1249 p += sizeof(ASDHeader) - CORRECT;
1250 ep = (ASDEntryPtr)p;
1251 /* the finderinfo entry */
1252 ep->offset += sizeof(ASDEntry);
1253 loff = ep->offset;
1254
1255 p += sizeof(ASDEntry);
1256 /* the finderinfo data */
1257 bcopy(p, p + sizeof(ASDEntry), INFOLEN);
1258 ep = (ASDEntryPtr)p;
1259 /* the new resourcefork entry */
1260 ep->entryID = EntryRSRCFork;
1261 ep->offset = loff + INFOLEN;
1262 ep->len = di_size;
1263 /* write the new appledouble entries to the file */
1264 if ((ofile = open(oFileRsrc, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
1265 fprintf(stderr, "%s: cannot create resource file: %s\n",
1266 name, strerror(errno));
1267 skipfile();
1268 return (FAIL);
1269 }
1270 write(ofile, buf, 70 + sizeof(ASDEntry));
1271 /* and add the resource data from tape */
1272 getfile(xtrfile, xtrskip);
1273
1274 if (fchown(ofile, uid, gid) < 0)
1275 warn("%s: fchown", name);
1276 if (fchmod(ofile, mode) < 0)
1277 warn("%s: fchmod", name);
1278 (void) close(ofile);
1279 utimes(oFileRsrc, timep);
1280 (void) lsetflags(oFileRsrc, flags);
1281 return (GOOD);
1282 }
1283 /* NOTREACHED */
1284 }
1285 #endif /* DUMP_MACOSX */
1286
1287 int
1288 readxattr(char *buffer)
1289 {
1290 if (dflag)
1291 msg("reading EA data for inode %lu\n", curfile.ino);
1292
1293 curfile.name = "EA block";
1294 if (curfile.dip->di_size > XATTR_MAXSIZE) {
1295 fprintf(stderr, "EA size too big (%ld)", (long)curfile.dip->di_size);
1296 skipfile();
1297 return (FAIL);
1298 }
1299
1300 memset(xattrbuf, 0, XATTR_MAXSIZE);
1301 xattrlen = 0;
1302
1303 /*
1304 * ugly hack: cope with invalid spcl.c_addr[] records written by
1305 * old versions of dump.
1306 */
1307 readmapflag = 1;
1308
1309 getfile(xtrxattr, xtrnull);
1310
1311 readmapflag = 0;
1312
1313 memcpy(buffer, xattrbuf, XATTR_MAXSIZE);
1314
1315 return (GOOD);
1316 }
1317
1318 /*
1319 * skip over bit maps on the tape
1320 */
1321 void
1322 skipmaps(void)
1323 {
1324
1325 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
1326 skipfile();
1327 }
1328
1329 /*
1330 * skip over a file on the tape
1331 */
1332 void
1333 skipfile(void)
1334 {
1335
1336 curfile.action = SKIP;
1337 getfile(xtrnull, xtrnull);
1338 }
1339
1340 /*
1341 * skip over any extended attributes.
1342 */
1343 void
1344 skipxattr(void)
1345 {
1346
1347 while (spcl.c_flags & DR_EXTATTRIBUTES)
1348 skipfile();
1349 }
1350
1351 /*
1352 * Extract a file from the tape.
1353 * When an allocated block is found it is passed to the fill function;
1354 * when an unallocated block (hole) is found, a zeroed buffer is passed
1355 * to the skip function.
1356 */
1357 void
1358 getfile(void (*fill) __P((char *, size_t)), void (*skip) __P((char *, size_t)))
1359 {
1360 int i;
1361 volatile int curblk = 0;
1362 volatile quad_t size = spcl.c_dinode.di_size;
1363 volatile int last_write_was_hole = 0;
1364 quad_t origsize = size;
1365 static char clearedbuf[MAXBSIZE];
1366 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
1367 char junk[TP_BSIZE];
1368
1369 if (spcl.c_type == TS_END)
1370 panic("ran off end of tape\n");
1371 if (spcl.c_magic != NFS_MAGIC)
1372 panic("not at beginning of a file\n");
1373 if (!gettingfile && setjmp(restart) != 0)
1374 return;
1375 gettingfile++;
1376 loop:
1377 for (i = 0; i < spcl.c_count; i++) {
1378 if (readmapflag || spcl.c_addr[i]) {
1379 readtape(&buf[curblk++][0]);
1380 if (curblk == fssize / TP_BSIZE) {
1381 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
1382 fssize : (curblk - 1) * TP_BSIZE + size));
1383 curblk = 0;
1384 last_write_was_hole = 0;
1385 }
1386 } else {
1387 if (curblk > 0) {
1388 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
1389 curblk * TP_BSIZE :
1390 (curblk - 1) * TP_BSIZE + size));
1391 curblk = 0;
1392 }
1393 (*skip)(clearedbuf, (long)(size > TP_BSIZE ?
1394 TP_BSIZE : size));
1395 last_write_was_hole = 1;
1396 }
1397 if ((size -= TP_BSIZE) <= 0) {
1398 for (i++; i < spcl.c_count; i++)
1399 if (readmapflag || spcl.c_addr[i])
1400 readtape(junk);
1401 break;
1402 }
1403 }
1404 while (gethead(&spcl) != GOOD) {
1405 fprintf(stderr, "Incorrect block for %s at %ld blocks\n",
1406 curfile.name, (long)blksread);
1407 }
1408 if (size > 0) {
1409 if (spcl.c_type == TS_ADDR)
1410 goto loop;
1411 Dprintf(stdout,
1412 "Missing address (header) block for %s at %ld blocks\n",
1413 curfile.name, (long)blksread);
1414 }
1415 if (curblk > 0) {
1416 (*fill)((char *)buf, (size_t)((curblk * TP_BSIZE) + size));
1417 last_write_was_hole = 0;
1418 }
1419 if (size > 0) {
1420 fprintf(stderr, "Missing blocks at the end of %s, assuming hole\n", curfile.name);
1421 while (size > 0) {
1422 size_t skp = size > TP_BSIZE ? TP_BSIZE : size;
1423 (*skip)(clearedbuf, skp);
1424 size -= skp;
1425 }
1426 last_write_was_hole = 1;
1427 }
1428 if (last_write_was_hole) {
1429 if (FTRUNCATE(ofile, origsize) < 0)
1430 warn("%s: ftruncate", curfile.name);
1431 }
1432 if (!readingmaps)
1433 findinode(&spcl);
1434 gettingfile = 0;
1435 }
1436
1437 /*
1438 * Write out the next block of a file.
1439 */
1440 static void
1441 xtrfile(char *buf, size_t size)
1442 {
1443
1444 if (Nflag)
1445 return;
1446 if (write(ofile, buf, (int) size) == -1)
1447 err(1, "write error extracting inode %lu, name %s\nwrite",
1448 (unsigned long)curfile.ino, curfile.name);
1449 }
1450
1451 #ifdef DUMP_MACOSX
1452 static void
1453 xtrfilefinderinfo(char *buf, size_t size)
1454 {
1455 bcopy(buf, &gFndrInfo, size);
1456 }
1457 #endif /* DUMP_MACOSX */
1458
1459 /*
1460 * Skip over a hole in a file.
1461 */
1462 /* ARGSUSED */
1463 static void
1464 xtrskip(UNUSED(char *buf), size_t size)
1465 {
1466
1467 if (LSEEK(ofile, (OFF_T)size, SEEK_CUR) == -1)
1468 err(1, "seek error extracting inode %lu, name %s\nlseek",
1469 (unsigned long)curfile.ino, curfile.name);
1470 }
1471
1472 /*
1473 * Collect the next block of a symbolic link.
1474 */
1475 static void
1476 xtrlnkfile(char *buf, size_t size)
1477 {
1478
1479 pathlen += size;
1480 if (pathlen > MAXPATHLEN) {
1481 buf[size - 1] = '\0';
1482 errx(1, "symbolic link name: %s->%s%s; too long %d",
1483 curfile.name, lnkbuf, buf, pathlen);
1484 }
1485 (void) strcat(lnkbuf, buf);
1486 lnkbuf[pathlen] = '\0';
1487 }
1488
1489 /*
1490 * Skip over a hole in a symbolic link (should never happen).
1491 */
1492 /* ARGSUSED */
1493 static void
1494 xtrlnkskip(UNUSED(char *buf), UNUSED(size_t size))
1495 {
1496
1497 errx(1, "unallocated block in symbolic link %s", curfile.name);
1498 }
1499
1500 /*
1501 * Collect the next block of a bit map.
1502 */
1503 static void
1504 xtrmap(char *buf, size_t size)
1505 {
1506
1507 memmove(map, buf, size);
1508 map += size;
1509 }
1510
1511 /*
1512 * Skip over a hole in a bit map (should never happen).
1513 */
1514 /* ARGSUSED */
1515 static void
1516 xtrmapskip(UNUSED(char *buf), size_t size)
1517 {
1518
1519 panic("hole in map\n");
1520 map += size;
1521 }
1522
1523 /*
1524 * Noop, when an extraction function is not needed.
1525 */
1526 /* ARGSUSED */
1527 void
1528 xtrnull(UNUSED(char *buf), UNUSED(size_t size))
1529 {
1530
1531 return;
1532 }
1533
1534 #if COMPARE_ONTHEFLY
1535 /*
1536 * Compare the next block of a file.
1537 */
1538 static void
1539 xtrcmpfile(char *buf, size_t size)
1540 {
1541 static char cmpbuf[MAXBSIZE];
1542
1543 if (cmperror)
1544 return;
1545
1546 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1547 fprintf(stderr, "%s: size has changed.\n",
1548 curfile.name);
1549 cmperror = 1;
1550 return;
1551 }
1552
1553 if (memcmp(buf, cmpbuf, size) != 0) {
1554 fprintf(stderr, "%s: tape and disk copies are different\n",
1555 curfile.name);
1556 cmperror = 1;
1557 return;
1558 }
1559 }
1560
1561 /*
1562 * Skip over a hole in a file.
1563 */
1564 static void
1565 xtrcmpskip(UNUSED(char *buf), size_t size)
1566 {
1567 static char cmpbuf[MAXBSIZE];
1568 int i;
1569
1570 if (cmperror)
1571 return;
1572
1573 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1574 fprintf(stderr, "%s: size has changed.\n",
1575 curfile.name);
1576 cmperror = 1;
1577 return;
1578 }
1579
1580 for (i = 0; i < (int)size; ++i)
1581 if (cmpbuf[i] != '\0') {
1582 fprintf(stderr, "%s: tape and disk copies are different\n",
1583 curfile.name);
1584 cmperror = 1;
1585 return;
1586 }
1587 }
1588 #endif /* COMPARE_ONTHEFLY */
1589
1590 static void
1591 xtrxattr(char *buf, size_t size)
1592 {
1593 if (xattrlen + size > XATTR_MAXSIZE) {
1594 fprintf(stderr, "EA size too big (%ld)", (long)xattrlen + size);
1595 return;
1596 }
1597 memcpy(xattrbuf + xattrlen, buf, size);
1598 xattrlen += size;
1599 }
1600
1601 #if !COMPARE_ONTHEFLY
1602 static int
1603 do_cmpfiles(int fd_tape, int fd_disk, OFF_T size)
1604 {
1605 static char buf_tape[BUFSIZ];
1606 static char buf_disk[BUFSIZ];
1607 ssize_t n_tape;
1608 ssize_t n_disk;
1609
1610 while (size > 0) {
1611 if ((n_tape = read(fd_tape, buf_tape, sizeof(buf_tape))) < 1) {
1612 close(fd_tape), close(fd_disk);
1613 panic("do_cmpfiles: unexpected EOF[1]");
1614 }
1615 if ((n_disk = read(fd_disk, buf_disk, sizeof(buf_tape))) < 1) {
1616 close(fd_tape), close(fd_disk);
1617 panic("do_cmpfiles: unexpected EOF[2]");
1618 }
1619 if (n_tape != n_disk) {
1620 close(fd_tape), close(fd_disk);
1621 panic("do_cmpfiles: sizes different!");
1622 }
1623 if (memcmp(buf_tape, buf_disk, (size_t)n_tape) != 0) return (1);
1624 size -= n_tape;
1625 }
1626 return (0);
1627 }
1628
1629 /* for debugging compare problems */
1630 #undef COMPARE_FAIL_KEEP_FILE
1631
1632 static
1633 #ifdef COMPARE_FAIL_KEEP_FILE
1634 /* return true if tapefile should be unlinked after compare */
1635 int
1636 #else
1637 void
1638 #endif
1639 cmpfiles(char *tapefile, char *diskfile, struct STAT *sbuf_disk)
1640 {
1641 struct STAT sbuf_tape;
1642 int fd_tape, fd_disk;
1643
1644 if (STAT(tapefile, &sbuf_tape) != 0) {
1645 panic("can't lstat tmp file %s: %s\n", tapefile,
1646 strerror(errno));
1647 do_compare_error;
1648 }
1649
1650 if (sbuf_disk->st_size != sbuf_tape.st_size) {
1651 fprintf(stderr,
1652 "%s: size changed from %lld to %lld.\n",
1653 diskfile, (long long)sbuf_tape.st_size, (long long)sbuf_disk->st_size);
1654 do_compare_error;
1655 #ifdef COMPARE_FAIL_KEEP_FILE
1656 return (0);
1657 #else
1658 return;
1659 #endif
1660 }
1661
1662 if ((fd_tape = OPEN(tapefile, O_RDONLY)) < 0) {
1663 panic("can't open %s: %s\n", tapefile, strerror(errno));
1664 do_compare_error;
1665 }
1666 if ((fd_disk = OPEN(diskfile, O_RDONLY)) < 0) {
1667 close(fd_tape);
1668 panic("can't open %s: %s\n", diskfile, strerror(errno));
1669 do_compare_error;
1670 }
1671
1672 if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) {
1673 fprintf(stderr, "%s: tape and disk copies are different\n",
1674 diskfile);
1675 close(fd_tape);
1676 close(fd_disk);
1677 do_compare_error;
1678 #ifdef COMPARE_FAIL_KEEP_FILE
1679 /* rename the file to live in /tmp */
1680 /* rename `tapefile' to /tmp/<basename of diskfile> */
1681 {
1682 char *p = strrchr(diskfile, '/');
1683 char newname[MAXPATHLEN];
1684 if (!p) {
1685 panic("can't find / in %s\n", diskfile);
1686 }
1687 snprintf(newname, sizeof(newname), "%s/debug/%s", tmpdir, p + 1);
1688 if (rename(tapefile, newname)) {
1689 panic("rename from %s to %s failed: %s\n",
1690 tapefile, newname,
1691 strerror(errno));
1692 } else {
1693 fprintf(stderr, "*** %s saved to %s\n",
1694 tapefile, newname);
1695 }
1696 }
1697
1698 /* don't unlink the file (it's not there anymore */
1699 /* anyway) */
1700 return (0);
1701 #else
1702 return;
1703 #endif
1704 }
1705 close(fd_tape);
1706 close(fd_disk);
1707 #ifdef COMPARE_FAIL_KEEP_FILE
1708 return (1);
1709 #endif
1710 }
1711 #endif /* !COMPARE_ONTHEFLY */
1712
1713 static void
1714 compareattr(char *name)
1715 {
1716 int xattr_done = 0;
1717
1718 while (spcl.c_flags & DR_EXTATTRIBUTES) {
1719 switch (spcl.c_extattributes) {
1720 case EXT_MACOSFNDRINFO:
1721 msg("MacOSX not supported for comparision in this version, skipping\n");
1722 skipfile();
1723 break;
1724 case EXT_MACOSRESFORK:
1725 msg("MacOSX not supported for comparision in this version, skipping\n");
1726 skipfile();
1727 break;
1728 case EXT_XATTR: {
1729 char xattr[XATTR_MAXSIZE];
1730
1731 if (readxattr(xattr) == GOOD) {
1732 if (xattr_compare(name, xattr) == FAIL)
1733 do_compare_error;
1734 xattr_done = 1;
1735 }
1736 else
1737 do_compare_error;
1738 break;
1739 }
1740 default:
1741 msg("unexpected inode extension %ld, skipping\n", spcl.c_extattributes);
1742 skipfile();
1743 break;
1744 }
1745 }
1746 if (!xattr_done && xattr_compare(name, NULL) == FAIL)
1747 do_compare_error;
1748 }
1749
1750 #if !COMPARE_ONTHEFLY
1751 static char tmpfilename[MAXPATHLEN];
1752 #endif
1753
1754 void
1755 comparefile(char *name)
1756 {
1757 mode_t mode;
1758 uid_t uid;
1759 uid_t gid;
1760 unsigned int flags;
1761 unsigned long newflags;
1762 struct STAT sb;
1763 int r;
1764 #if !COMPARE_ONTHEFLY
1765 static char *tmpfile = NULL;
1766 struct STAT stemp;
1767 #endif
1768 curfile.name = name;
1769 curfile.action = USING;
1770 mode = curfile.dip->di_mode;
1771 flags = curfile.dip->di_flags;
1772 uid = curfile.dip->di_uid;
1773 gid = curfile.dip->di_gid;
1774
1775 if ((mode & IFMT) == IFSOCK) {
1776 Vprintf(stdout, "skipped socket %s\n", name);
1777 skipfile();
1778 return;
1779 }
1780
1781 if ((r = LSTAT(name, &sb)) != 0) {
1782 warn("unable to stat %s", name);
1783 do_compare_error;
1784 skipfile();
1785 return;
1786 }
1787
1788 Vprintf(stdout, "comparing %s (size: %lld, mode: 0%o)\n", name,
1789 (long long)sb.st_size, mode);
1790
1791 if (sb.st_mode != mode) {
1792 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
1793 name, mode & 07777, sb.st_mode & 07777);
1794 do_compare_error;
1795 }
1796 if (sb.st_uid != uid) {
1797 fprintf(stderr, "%s: uid changed from %d to %d.\n",
1798 name, uid, sb.st_uid);
1799 do_compare_error;
1800 }
1801 if (sb.st_gid != gid) {
1802 fprintf(stderr, "%s: gid changed from %d to %d.\n",
1803 name, gid, sb.st_gid);
1804 do_compare_error;
1805 }
1806 #ifdef __linux__
1807 if (lgetflags(name, &newflags) < 0) {
1808 if (flags != 0) {
1809 warn("%s: lgetflags failed", name);
1810 do_compare_error;
1811 }
1812 }
1813 else {
1814 if (newflags != flags) {
1815 fprintf(stderr, "%s: flags changed from 0x%08x to 0x%08lx.\n",
1816 name, flags, newflags);
1817 do_compare_error;
1818 }
1819 }
1820 #endif
1821 if (spcl.c_flags & DR_METAONLY) {
1822 skipfile();
1823 return;
1824 }
1825 switch (mode & IFMT) {
1826 default:
1827 skipfile();
1828 return;
1829
1830 case IFSOCK:
1831 skipfile();
1832 return;
1833
1834 case IFDIR:
1835 skipfile();
1836 compareattr(name);
1837 return;
1838
1839 case IFLNK: {
1840 char lbuf[MAXPATHLEN + 1];
1841 int lsize;
1842
1843 if (!(sb.st_mode & S_IFLNK)) {
1844 fprintf(stderr, "%s: is no longer a symbolic link\n",
1845 name);
1846 do_compare_error;
1847 return;
1848 }
1849 lnkbuf[0] = '\0';
1850 pathlen = 0;
1851 getfile(xtrlnkfile, xtrlnkskip);
1852 if (pathlen == 0) {
1853 fprintf(stderr,
1854 "%s: zero length symbolic link (ignored)\n",
1855 name);
1856 do_compare_error;
1857 return;
1858 }
1859 if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) {
1860 panic("readlink of %s failed: %s\n", name,
1861 strerror(errno));
1862 do_compare_error;
1863 }
1864 lbuf[lsize] = 0;
1865 if (strcmp(lbuf, lnkbuf) != 0) {
1866 fprintf(stderr,
1867 "%s: symbolic link changed from %s to %s.\n",
1868 name, lnkbuf, lbuf);
1869 do_compare_error;
1870 return;
1871 }
1872 compareattr(name);
1873 return;
1874 }
1875
1876 case IFCHR:
1877 case IFBLK:
1878 if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) {
1879 fprintf(stderr, "%s: no longer a special file\n",
1880 name);
1881 do_compare_error;
1882 skipfile();
1883 return;
1884 }
1885
1886 if (sb.st_rdev != (dev_t)curfile.dip->di_rdev) {
1887 fprintf(stderr,
1888 "%s: device changed from %d,%d to %d,%d.\n",
1889 name,
1890 major(curfile.dip->di_rdev),
1891 minor(curfile.dip->di_rdev),
1892 major(sb.st_rdev),
1893 minor(sb.st_rdev));
1894 do_compare_error;
1895 }
1896 skipfile();
1897 compareattr(name);
1898 return;
1899
1900 case IFREG:
1901 #if COMPARE_ONTHEFLY
1902 if ((ifile = OPEN(name, O_RDONLY)) < 0) {
1903 warn("can't open %s", name);
1904 skipfile();
1905 do_compare_error;
1906 }
1907 else {
1908 cmperror = 0;
1909 getfile(xtrcmpfile, xtrcmpskip);
1910 if (!cmperror) {
1911 char c;
1912 if (read(ifile, &c, 1) != 0) {
1913 fprintf(stderr, "%s: size has changed.\n",
1914 name);
1915 cmperror = 1;
1916 }
1917 }
1918 if (cmperror)
1919 do_compare_error;
1920 close(ifile);
1921 }
1922 #else
1923 if (tmpfile == NULL) {
1924 /* argument to mktemp() must not be in RO space: */
1925 snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir);
1926 tmpfile = mktemp(&tmpfilename[0]);
1927 }
1928 if ((STAT(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) {
1929 panic("cannot delete tmp file %s: %s\n",
1930 tmpfile, strerror(errno));
1931 }
1932 if ((ofile = OPEN(tmpfile, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) {
1933 panic("cannot create file temp file %s: %s\n",
1934 name, strerror(errno));
1935 }
1936 getfile(xtrfile, xtrskip);
1937 (void) close(ofile);
1938 #ifdef COMPARE_FAIL_KEEP_FILE
1939 if (cmpfiles(tmpfile, name, &sb))
1940 unlink(tmpfile);
1941 #else
1942 cmpfiles(tmpfile, name, &sb);
1943 unlink(tmpfile);
1944 #endif
1945 #endif /* COMPARE_ONTHEFLY */
1946 compareattr(name);
1947 return;
1948 }
1949 /* NOTREACHED */
1950 }
1951
1952 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1953 static void (*readtape_func)(char *) = readtape_set;
1954
1955 /*
1956 * Read TP_BSIZE blocks from the input.
1957 * Handle read errors, and end of media.
1958 * Decompress compressed blocks.
1959 */
1960 static void
1961 readtape(char *buf)
1962 {
1963 (*readtape_func)(buf); /* call the actual processing routine */
1964 }
1965
1966 /*
1967 * Set function pointer for readtape() routine. zflag and magtapein must
1968 * be correctly set before the first call to readtape().
1969 */
1970 static void
1971 readtape_set(char *buf)
1972 {
1973 if (!zflag)
1974 readtape_func = readtape_uncompr;
1975 else {
1976 newcomprbuf(ntrec);
1977 if (magtapein)
1978 readtape_func = readtape_comprtape;
1979 else
1980 readtape_func = readtape_comprfile;
1981 }
1982 readtape(buf);
1983 }
1984
1985 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
1986
1987 /*
1988 * This is the original readtape(), it's used for reading uncompressed input.
1989 * Read TP_BSIZE blocks from the input.
1990 * Handle read errors, and end of media.
1991 */
1992 static void
1993 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1994 readtape_uncompr(char *buf)
1995 #else
1996 readtape(char *buf)
1997 #endif
1998 {
1999 ssize_t rd, newvol, i;
2000 int cnt, seek_failed;
2001
2002 if (blkcnt < numtrec) {
2003 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2004 blksread++;
2005 tpblksread++;
2006 return;
2007 }
2008 tbufptr = tapebuf;
2009 for (i = 0; i < ntrec; i++)
2010 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2011 if (numtrec == 0)
2012 numtrec = ntrec;
2013 cnt = ntrec * TP_BSIZE;
2014 rd = 0;
2015 #ifdef USE_QFA
2016 if (createtapeposflag)
2017 (void)GetTapePos(&curtapepos);
2018 #endif
2019 getmore:
2020 #ifdef RRESTORE
2021 if (!Afile && host)
2022 i = rmtread(&tapebuf[rd], cnt);
2023 else
2024 #endif
2025 i = read(mt, &tapebuf[rd], cnt);
2026
2027 /*
2028 * Check for mid-tape short read error.
2029 * If found, skip rest of buffer and start with the next.
2030 */
2031 if (!pipein && numtrec < ntrec && i > 0) {
2032 Dprintf(stdout, "mid-media short read error.\n");
2033 numtrec = ntrec;
2034 }
2035 /*
2036 * Handle partial block read.
2037 */
2038 if (pipein && i == 0 && rd > 0)
2039 i = rd;
2040 else if (i > 0 && i != ntrec * TP_BSIZE) {
2041 if (pipein) {
2042 rd += i;
2043 cnt -= i;
2044 if (cnt > 0)
2045 goto getmore;
2046 i = rd;
2047 } else {
2048 /*
2049 * Short read. Process the blocks read.
2050 */
2051 if (i % TP_BSIZE != 0)
2052 Vprintf(stdout,
2053 "partial block read: %ld should be %ld\n",
2054 (long)i, ntrec * TP_BSIZE);
2055 numtrec = i / TP_BSIZE;
2056 }
2057 }
2058 /*
2059 * Handle read error.
2060 */
2061 if (i < 0) {
2062 fprintf(stderr, "Tape read error while ");
2063 switch (curfile.action) {
2064 default:
2065 fprintf(stderr, "trying to set up tape\n");
2066 break;
2067 case UNKNOWN:
2068 fprintf(stderr, "trying to resynchronize\n");
2069 break;
2070 case USING:
2071 fprintf(stderr, "restoring %s\n", curfile.name);
2072 break;
2073 case SKIP:
2074 fprintf(stderr, "skipping over inode %lu\n",
2075 (unsigned long)curfile.ino);
2076 break;
2077 }
2078 if (!yflag && !reply("continue"))
2079 exit(1);
2080 i = ntrec * TP_BSIZE;
2081 memset(tapebuf, 0, (size_t)i);
2082 #ifdef RRESTORE
2083 if (!Afile && host)
2084 seek_failed = (rmtseek(i, 1) < 0);
2085 else
2086 #endif
2087 seek_failed = (LSEEK(mt, i, SEEK_CUR) == (OFF_T)-1);
2088
2089 if (seek_failed) {
2090 warn("continuation failed");
2091 if (!yflag && !reply("assume end-of-tape and continue"))
2092 exit(1);
2093 i = 0;
2094 }
2095 }
2096 /*
2097 * Handle end of tape.
2098 */
2099 if (i == 0) {
2100 Vprintf(stdout, "End-of-tape encountered\n");
2101 if (!pipein) {
2102 newvol = volno + 1;
2103 volno = 0;
2104 numtrec = 0;
2105 getvol(newvol);
2106 readtape(buf);
2107 return;
2108 }
2109 if (rd % TP_BSIZE != 0)
2110 panic("partial block read: %d should be %d\n",
2111 rd, ntrec * TP_BSIZE);
2112 terminateinput();
2113 memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE);
2114 }
2115 blkcnt = 0;
2116 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2117 blksread++;
2118 tpblksread++;
2119 }
2120
2121 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
2122
2123 /*
2124 * Read a compressed format block from a file or pipe and uncompress it.
2125 * Attempt to handle read errors, and end of file.
2126 */
2127 static void
2128 readtape_comprfile(char *buf)
2129 {
2130 long rl, size, i, ret;
2131 int newvol;
2132 struct tapebuf *tpb;
2133
2134 if (blkcnt < numtrec) {
2135 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2136 blksread++;
2137 tpblksread++;
2138 return;
2139 }
2140 /* need to read the next block */
2141 tbufptr = tapebuf;
2142 for (i = 0; i < ntrec; i++)
2143 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2144 numtrec = ntrec;
2145 tpb = (struct tapebuf *) tapebuf;
2146 #ifdef USE_QFA
2147 if (createtapeposflag)
2148 (void)GetTapePos(&curtapepos);
2149 #endif
2150
2151 /* read the block prefix */
2152 ret = read_a_block(mt, tapebuf, PREFIXSIZE, &rl);
2153 converttapebuf(tpb);
2154
2155 if (Vflag && (ret == 0 || rl < (int)PREFIXSIZE || tpb->length == 0))
2156 ret = 0;
2157 if (ret <= 0)
2158 goto readerr;
2159
2160 /* read the data */
2161 size = tpb->length;
2162 if (size > bufsize) {
2163 /* something's wrong */
2164 Vprintf(stdout, "Prefix size error, max size %d, got %ld\n",
2165 bufsize, size);
2166 size = bufsize;
2167 tpb->length = bufsize;
2168 }
2169 ret = read_a_block(mt, tpb->buf, size, &rl);
2170 if (ret <= 0)
2171 goto readerr;
2172
2173 tbufptr = decompress_tapebuf(tpb, rl + PREFIXSIZE);
2174 if (tbufptr == NULL) {
2175 msg_read_error("File decompression error while");
2176 if (!yflag && !reply("continue"))
2177 exit(1);
2178 memset(tapebuf, 0, bufsize);
2179 tbufptr = tapebuf;
2180 }
2181
2182 blkcnt = 0;
2183 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2184 blksread++;
2185 tpblksread++;
2186 return;
2187
2188 readerr:
2189 /* Errors while reading from a file or pipe are catastrophic. Since
2190 * there are no block boundaries, it's impossible to bypass the
2191 * block in error and find the start of the next block.
2192 */
2193 if (ret == 0) {
2194 /* It's possible to have multiple input files using -M
2195 * and -f file1,file2...
2196 */
2197 Vprintf(stdout, "End-of-File encountered\n");
2198 if (!pipein) {
2199 newvol = volno + 1;
2200 volno = 0;
2201 numtrec = 0;
2202 getvol(newvol);
2203 readtape(buf);
2204 return;
2205 }
2206 }
2207 msg_read_error("Read error while");
2208 /* if (!yflag && !reply("continue")) */
2209 exit(1);
2210 }
2211
2212 /*
2213 * Read compressed data from a tape and uncompress it.
2214 * Handle read errors, and end of media.
2215 * Since a tape consists of separate physical blocks, we try
2216 * to recover from errors by repositioning the tape to the next
2217 * block.
2218 */
2219 static void
2220 readtape_comprtape(char *buf)
2221 {
2222 long rl, size, i;
2223 int ret, newvol;
2224 struct tapebuf *tpb;
2225 struct mtop tcom;
2226
2227 if (blkcnt < numtrec) {
2228 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2229 blksread++;
2230 tpblksread++;
2231 return;
2232 }
2233 /* need to read the next block */
2234 tbufptr = tapebuf;
2235 for (i = 0; i < ntrec; i++)
2236 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2237 numtrec = ntrec;
2238 tpb = (struct tapebuf *) tapebuf;
2239 #ifdef USE_QFA
2240 if (createtapeposflag)
2241 (void)GetTapePos(&curtapepos);
2242 #endif
2243
2244 /* read the block */
2245 size = bufsize + PREFIXSIZE;
2246 ret = read_a_block(mt, tapebuf, size, &rl);
2247 if (ret <= 0)
2248 goto readerr;
2249
2250 converttapebuf(tpb);
2251 tbufptr = decompress_tapebuf(tpb, rl);
2252 if (tbufptr == NULL) {
2253 msg_read_error("Tape decompression error while");
2254 if (!yflag && !reply("continue"))
2255 exit(1);
2256 memset(tapebuf, 0, PREFIXSIZE + bufsize);
2257 tbufptr = tapebuf;
2258 }
2259 goto moverecord;
2260
2261 readerr:
2262 /* Handle errors: EOT switches to the next volume, other errors
2263 * attempt to position the tape to the next block.
2264 */
2265 if (ret == 0) {
2266 Vprintf(stdout, "End-of-tape encountered\n");
2267 newvol = volno + 1;
2268 volno = 0;
2269 numtrec = 0;
2270 getvol(newvol);
2271 readtape(buf);
2272 return;
2273 }
2274
2275 msg_read_error("Tape read error while");
2276 if (!yflag && !reply("continue"))
2277 exit(1);
2278 memset(tapebuf, 0, PREFIXSIZE + bufsize);
2279 tbufptr = tapebuf;
2280
2281 #ifdef RRESTORE
2282 if (host)
2283 rl = rmtioctl(MTFSR, 1);
2284 else
2285 #endif
2286 {
2287 tcom.mt_op = MTFSR;
2288 tcom.mt_count = 1;
2289 rl = ioctl(mt, MTIOCTOP, &tcom);
2290 }
2291
2292 if (rl < 0) {
2293 warn("continuation failed");
2294 if (!yflag && !reply("assume end-of-tape and continue"))
2295 exit(1);
2296 ret = 0; /* end of tape */
2297 goto readerr;
2298 }
2299
2300 moverecord:
2301 blkcnt = 0;
2302 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2303 blksread++;
2304 tpblksread++;
2305 }
2306
2307 /*
2308 * Decompress a struct tapebuf into a buffer. readsize is the size read
2309 * from the tape/file and is used for error messages. Returns a pointer
2310 * to the location of the uncompressed buffer or NULL on errors.
2311 * Adjust numtrec and complain for a short block.
2312 */
2313 static char *
2314 decompress_tapebuf(struct tapebuf *tpbin, int readsize)
2315 {
2316 /* If zflag is on, all blocks have a struct tapebuf prefix */
2317 /* zflag gets set in setup() from the dump header */
2318 int cresult, blocklen;
2319 unsigned long worklen;
2320 char *output = NULL,*reason = NULL, *lengtherr = NULL;
2321
2322 /* build a length error message */
2323 blocklen = tpbin->length;
2324 if (readsize < blocklen + (int)PREFIXSIZE)
2325 lengtherr = "short";
2326 else
2327 if (readsize > blocklen + (int)PREFIXSIZE)
2328 lengtherr = "long";
2329
2330 worklen = comprlen;
2331 cresult = 1;
2332 if (tpbin->compressed) {
2333 /* uncompress whatever we read, if it fails, complain later */
2334 if (tpbin->flags == COMPRESS_ZLIB) {
2335 #ifndef HAVE_ZLIB
2336 errx(1,"This restore version doesn't support zlib decompression");
2337 #else
2338 cresult = uncompress(comprbuf, &worklen,
2339 tpbin->buf, blocklen);
2340 output = comprbuf;
2341 switch (cresult) {
2342 case Z_OK:
2343 break;
2344 case Z_MEM_ERROR:
2345 reason = "not enough memory";
2346 break;
2347 case Z_BUF_ERROR:
2348 reason = "buffer too small";
2349 break;
2350 case Z_DATA_ERROR:
2351 reason = "data error";
2352 break;
2353 default:
2354 reason = "unknown";
2355 }
2356 if (cresult == Z_OK)
2357 cresult = 1;
2358 else
2359 cresult = 0;
2360 #endif /* HAVE_ZLIB */
2361 }
2362 if (tpbin->flags == COMPRESS_BZLIB) {
2363 #ifndef HAVE_BZLIB
2364 errx(1,"This restore version doesn't support bzlib decompression");
2365 #else
2366 unsigned int worklen2 = worklen;
2367 cresult = BZ2_bzBuffToBuffDecompress(
2368 comprbuf, &worklen2,
2369 tpbin->buf, blocklen, 0, 0);
2370 worklen = worklen2;
2371 output = comprbuf;
2372 switch (cresult) {
2373 case BZ_OK:
2374 break;
2375 case BZ_MEM_ERROR:
2376 reason = "not enough memory";
2377 break;
2378 case BZ_OUTBUFF_FULL:
2379 reason = "buffer too small";
2380 break;
2381 case BZ_DATA_ERROR:
2382 case BZ_DATA_ERROR_MAGIC:
2383 case BZ_UNEXPECTED_EOF:
2384 reason = "data error";
2385 break;
2386 default:
2387 reason = "unknown";
2388 }
2389 if (cresult == BZ_OK)
2390 cresult = 1;
2391 else
2392 cresult = 0;
2393 #endif /* HAVE_BZLIB */
2394 }
2395 if (tpbin->flags == COMPRESS_LZO) {
2396 #ifndef HAVE_LZO
2397 errx(1,"This restore version doesn't support lzo decompression");
2398 #else
2399 lzo_uint worklen2 = worklen;
2400 cresult = lzo1x_decompress(tpbin->buf, blocklen,
2401 comprbuf, &worklen2, NULL);
2402 worklen = worklen2;
2403 output = comprbuf;
2404 switch (cresult) {
2405 case LZO_E_OK:
2406 break;
2407 case LZO_E_ERROR:
2408 case LZO_E_EOF_NOT_FOUND:
2409 reason = "data error";
2410 break;
2411 default:
2412 reason = "unknown";
2413 }
2414 if (cresult == LZO_E_OK)
2415 cresult = 1;
2416 else
2417 cresult = 0;
2418 #endif /* HAVE_LZO */
2419 }
2420 }
2421 else {
2422 output = tpbin->buf;
2423 worklen = blocklen;
2424 }
2425 if (cresult) {
2426 numtrec = worklen / TP_BSIZE;
2427 if (worklen % TP_BSIZE != 0)
2428 reason = "length mismatch";
2429 }
2430 if (reason) {
2431 if (lengtherr)
2432 fprintf(stderr, "%s compressed block: %d expected: %lu\n",
2433 lengtherr, readsize, (unsigned long)tpbin->length + PREFIXSIZE);
2434 fprintf(stderr, "decompression error, block %ld: %s\n",
2435 tpblksread+1, reason);
2436 if (!cresult)
2437 output = NULL;
2438 }
2439 return output;
2440 }
2441
2442 /*
2443 * Print an error message for a read error.
2444 * This was exteracted from the original readtape().
2445 */
2446 static void
2447 msg_read_error(char *m)
2448 {
2449 switch (curfile.action) {
2450 default:
2451 fprintf(stderr, "%s trying to set up tape\n", m);
2452 break;
2453 case UNKNOWN:
2454 fprintf(stderr, "%s trying to resynchronize\n", m);
2455 break;
2456 case USING:
2457 fprintf(stderr, "%s restoring %s\n", m, curfile.name);
2458 break;
2459 case SKIP:
2460 fprintf(stderr, "%s skipping over inode %lu\n", m,
2461 (unsigned long)curfile.ino);
2462 break;
2463 }
2464 }
2465 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
2466
2467 /*
2468 * Read the first block and get the blocksize from it. Test
2469 * for a compressed dump tape/file. setup() will make the final
2470 * determination by checking the compressed flag if gethead()
2471 * finds a valid header. The test here is necessary to offset the buffer
2472 * by the size of the compressed prefix. zflag is set here so that
2473 * readtape_set can set the correct function pointer for readtape().
2474 * Note that the first block of each tape/file is not compressed
2475 * and does not have a prefix.
2476 */
2477 static void
2478 findtapeblksize(void)
2479 {
2480 long i;
2481 size_t len;
2482 struct tapebuf *tpb = (struct tapebuf *) tapebuf;
2483 struct s_spcl spclpt;
2484
2485 for (i = 0; i < ntrec; i++)
2486 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2487 blkcnt = 0;
2488 tbufptr = tapebuf;
2489 /*
2490 * For a pipe or file, read in the first record. For a tape, read
2491 * the first block.
2492 */
2493 len = magtapein ? ntrec * TP_BSIZE : TP_BSIZE;
2494
2495 if (read_a_block(mt, tapebuf, len, &i) <= 0)
2496 errx(1, "Tape read error on first record");
2497
2498 memcpy(&spclpt, tapebuf, TP_BSIZE);
2499 cvtflag = 0;
2500 if (converthead(&spclpt) == FAIL) {
2501 cvtflag++;
2502 if (converthead(&spclpt) == FAIL) {
2503 /* Special case for old compressed tapes with prefix */
2504 if (magtapein && (i % TP_BSIZE != 0))
2505 goto oldformat;
2506 errx(1, "Tape is not a dump tape");
2507 }
2508 fprintf(stderr, "Converting to new file system format.\n");
2509 }
2510 /*
2511 * If the input is from a file or a pipe, we read TP_BSIZE
2512 * bytes looking for a dump header. If the dump is compressed
2513 * we need to read in the rest of the block, as determined
2514 * by c_ntrec in the dump header. The first block of the
2515 * dump is not compressed and does not have a prefix.
2516 */
2517 if (!magtapein) {
2518 if (spclpt.c_type == TS_TAPE
2519 && spclpt.c_flags & DR_COMPRESSED) {
2520 /* It's a compressed dump file, read in the */
2521 /* rest of the block based on spclpt.c_ntrec. */
2522 if (spclpt.c_ntrec > ntrec)
2523 errx(1, "Tape blocksize is too large, use "
2524 "\'-b %d\' ", spclpt.c_ntrec);
2525 ntrec = spclpt.c_ntrec;
2526 len = (ntrec - 1) * TP_BSIZE;
2527 zflag = 1;
2528 }
2529 else {
2530 /* read in the rest of the block based on bufsize */
2531 len = bufsize - TP_BSIZE;
2532 }
2533 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) < 0
2534 || (i != (long)len && i % TP_BSIZE != 0))
2535 errx(1,"Error reading dump file header");
2536 tbufptr = tapebuf;
2537 numtrec = ntrec;
2538 Vprintf(stdout, "Input block size is %ld\n", ntrec);
2539 return;
2540 } /* if (!magtapein) */
2541
2542 /*
2543 * If the input is a tape, we tried to read ntrec * TP_BSIZE bytes.
2544 * If the value of ntrec is too large, we read less than
2545 * what we asked for; adjust the value of ntrec and test for
2546 * a compressed dump tape.
2547 */
2548 if (i % TP_BSIZE != 0) {
2549 oldformat:
2550 /* may be old format compressed dump tape with a prefix */
2551 memcpy(&spclpt, tpb->buf, TP_BSIZE);
2552 cvtflag = 0;
2553 if (converthead(&spclpt) == FAIL) {
2554 cvtflag++;
2555 if (converthead(&spclpt) == FAIL)
2556 errx(1, "Tape is not a dump tape");
2557 fprintf(stderr, "Converting to new file system format.\n");
2558 }
2559 if (i % TP_BSIZE == PREFIXSIZE
2560 && tpb->compressed == 0
2561 && spclpt.c_type == TS_TAPE
2562 && spclpt.c_flags & DR_COMPRESSED) {
2563 zflag = 1;
2564 tbufptr = tpb->buf;
2565 if (tpb->length > bufsize)
2566 errx(1, "Tape blocksize is too large, use "
2567 "\'-b %d\' ", tpb->length / TP_BSIZE);
2568 }
2569 else
2570 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
2571 i, TP_BSIZE);
2572 }
2573 ntrec = i / TP_BSIZE;
2574 if (spclpt.c_type == TS_TAPE) {
2575 if (spclpt.c_flags & DR_COMPRESSED)
2576 zflag = 1;
2577 if (spclpt.c_ntrec > ntrec)
2578 errx(1, "Tape blocksize is too large, use "
2579 "\'-b %d\' ", spclpt.c_ntrec);
2580 }
2581 numtrec = ntrec;
2582 Vprintf(stdout, "Tape block size is %ld\n", ntrec);
2583 }
2584
2585 /*
2586 * Read a block of data handling all of the messy details.
2587 */
2588 static int read_a_block(int fd, char *buf, size_t len, long *lengthread)
2589 {
2590 long i = 1, size;
2591
2592 size = len;
2593 while (size > 0) {
2594 #ifdef RRESTORE
2595 if (!Afile && host)
2596 i = rmtread(buf, size);
2597 else
2598 #endif
2599 i = read(fd, buf, size);
2600
2601 if (i <= 0)
2602 break; /* EOD or error */
2603 size -= i;
2604 if (magtapein)
2605 break; /* block at a time for mt */
2606 buf += i;
2607 }
2608 *lengthread = len - size;
2609 return i;
2610 }
2611
2612 void
2613 closemt(void)
2614 {
2615
2616 if (mt < 0)
2617 return;
2618 #ifdef RRESTORE
2619 if (!Afile && host)
2620 rmtclose();
2621 else
2622 #endif
2623 (void) close(mt);
2624 }
2625
2626 static void
2627 setmagtapein(void) {
2628 struct mtget mt_stat;
2629 static int done = 0;
2630 if (done)
2631 return;
2632 done = 1;
2633 if (!pipein) {
2634 /* need to know if input is really from a tape */
2635 #ifdef RRESTORE
2636 if (host)
2637 magtapein = !lflag;
2638 else
2639 #endif
2640 magtapein = ioctl(mt, MTIOCGET, (char *)&mt_stat) == 0;
2641 }
2642
2643 Vprintf(stdout,"Input is from a %s %s\n",
2644 host ? "remote" : "local",
2645 magtapein ? "tape" :
2646 Vflag ? "multi-volume (no tape)" : "file/pipe");
2647 }
2648
2649 /*
2650 * Read the next block from the tape.
2651 * Check to see if it is one of several vintage headers.
2652 * If it is an old style header, convert it to a new style header.
2653 * If it is not any valid header, return an error.
2654 */
2655 static int
2656 gethead(struct s_spcl *buf)
2657 {
2658 readtape((char *)buf);
2659 return converthead(buf);
2660 }
2661
2662 static int
2663 converthead(struct s_spcl *buf)
2664 {
2665 int32_t i;
2666 union {
2667 quad_t qval;
2668 int32_t val[2];
2669 } qcvt;
2670 union u_ospcl {
2671 char dummy[TP_BSIZE];
2672 struct s_ospcl {
2673 int32_t c_type;
2674 int32_t c_date;
2675 int32_t c_ddate;
2676 int32_t c_volume;
2677 int32_t c_tapea;
2678 u_int16_t c_inumber;
2679 int32_t c_magic;
2680 int32_t c_checksum;
2681 struct odinode {
2682 u_int16_t odi_mode;
2683 u_int16_t odi_nlink;
2684 u_int16_t odi_uid;
2685 u_int16_t odi_gid;
2686 int32_t odi_size;
2687 int32_t odi_rdev;
2688 char odi_addr[36];
2689 int32_t odi_atime;
2690 int32_t odi_mtime;
2691 int32_t odi_ctime;
2692 } c_dinode;
2693 int32_t c_count;
2694 char c_fill[256];
2695 } s_ospcl;
2696 } u_ospcl;
2697
2698 if (!cvtflag) {
2699 if (buf->c_magic != NFS_MAGIC) {
2700 if (swabi(buf->c_magic) != NFS_MAGIC)
2701 return (FAIL);
2702 if (!Bcvt) {
2703 Vprintf(stdout, "Note: Doing Byte swapping\n");
2704 Bcvt = 1;
2705 }
2706 }
2707 if (checksum((int *)buf) == FAIL)
2708 return (FAIL);
2709 if (Bcvt)
2710 swabst((u_char *)"8i4s1l29i528bi192b4i", (u_char *)buf);
2711 goto good;
2712 }
2713 memcpy(&u_ospcl.s_ospcl, buf, TP_BSIZE);
2714 if (checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
2715 return(FAIL);
2716 if (u_ospcl.s_ospcl.c_magic == OFS_MAGIC) {
2717 memset((char *)buf, 0, (long)TP_BSIZE);
2718 buf->c_type = u_ospcl.s_ospcl.c_type;
2719 buf->c_date = u_ospcl.s_ospcl.c_date;
2720 buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
2721 buf->c_volume = u_ospcl.s_ospcl.c_volume;
2722 buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
2723 buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
2724 buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
2725 buf->c_magic = u_ospcl.s_ospcl.c_magic;
2726 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
2727 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
2728 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
2729 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
2730 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
2731 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
2732 #if defined(__linux__) || defined(sunos)
2733 buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime;
2734 buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2735 buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2736 #else /* __linux__ || sunos */
2737 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
2738 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2739 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2740 #endif /* __linux__ || sunos */
2741 buf->c_count = u_ospcl.s_ospcl.c_count;
2742 memmove(buf->c_addr, u_ospcl.s_ospcl.c_fill, (long)256);
2743 }
2744 else if (u_ospcl.s_ospcl.c_magic == FS_UFS2_MAGIC) {
2745 buf->c_date = (int32_t)(*(int64_t *)&u_ospcl.dummy[896]);
2746 buf->c_ddate = (int32_t)(*(int64_t *)&u_ospcl.dummy[904]);
2747 buf->c_tapea = (int32_t)(*(int64_t *)&u_ospcl.dummy[912]);
2748 buf->c_firstrec = (int32_t)(*(int64_t *)&u_ospcl.dummy[920]);
2749 buf->c_ntrec = 0;
2750 buf->c_extattributes = 0;
2751 buf->c_flags |= DR_NEWINODEFMT;
2752 ufs2flag = 1;
2753 }
2754 else
2755 return(FAIL);
2756 buf->c_magic = NFS_MAGIC;
2757
2758 good:
2759 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
2760 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
2761 qcvt.qval = buf->c_dinode.di_size;
2762 if (qcvt.val[0] || qcvt.val[1]) {
2763 Vprintf(stdout, "Note: Doing Quad swapping\n");
2764 Qcvt = 1;
2765 }
2766 }
2767 if (Qcvt) {
2768 qcvt.qval = buf->c_dinode.di_size;
2769 i = qcvt.val[1];
2770 qcvt.val[1] = qcvt.val[0];
2771 qcvt.val[0] = i;
2772 buf->c_dinode.di_size = qcvt.qval;
2773 }
2774 readmapflag = 0;
2775
2776 switch (buf->c_type) {
2777
2778 case TS_CLRI:
2779 case TS_BITS:
2780 /*
2781 * Have to patch up missing information in bit map headers
2782 */
2783 buf->c_inumber = 0;
2784 buf->c_dinode.di_size = buf->c_count * TP_BSIZE;
2785 if (buf->c_count > TP_NINDIR)
2786 readmapflag = 1;
2787 else
2788 for (i = 0; i < buf->c_count; i++)
2789 buf->c_addr[i]++;
2790 break;
2791
2792 case TS_TAPE:
2793 if ((buf->c_flags & DR_NEWINODEFMT) == 0)
2794 oldinofmt = 1;
2795 /* fall through */
2796 case TS_END:
2797 buf->c_inumber = 0;
2798 if (buf->c_flags & DR_INODEINFO) {
2799 memcpy(volinfo, buf->c_inos, TP_NINOS * sizeof(dump_ino_t));
2800 if (Bcvt)
2801 swabst((u_char *)"128i", (u_char *)volinfo);
2802 }
2803 break;
2804
2805 case TS_INODE:
2806 case TS_ADDR:
2807 break;
2808
2809 default:
2810 panic("gethead: unknown inode type %d\n", buf->c_type);
2811 break;
2812 }
2813 /*
2814 * If we are restoring a filesystem with old format inodes,
2815 * copy the uid/gid to the new location.
2816 */
2817 if (oldinofmt) {
2818 buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
2819 buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
2820 }
2821 if (dflag)
2822 accthdr(buf);
2823 return(GOOD);
2824 }
2825
2826 static void
2827 converttapebuf(struct tapebuf *tpb)
2828 {
2829 if (Bcvt) {
2830 struct tb {
2831 unsigned int length:28;
2832 unsigned int flags:3;
2833 unsigned int compressed:1;
2834 } tb;
2835 swabst((u_char *)"i", (u_char *)tpb);
2836 memcpy(&tb, tpb, 4);
2837 tpb->length = tb.length;
2838 tpb->flags = tb.flags;
2839 tpb->compressed = tb.compressed;
2840 }
2841 }
2842
2843 /*
2844 * Check that a header is where it belongs and predict the next header
2845 */
2846 static void
2847 accthdr(struct s_spcl *header)
2848 {
2849 static dump_ino_t previno = 0x7fffffff;
2850 static int prevtype;
2851 static long predict;
2852 long blks, i;
2853
2854 if (header->c_type == TS_TAPE) {
2855 fprintf(stderr, "Volume header (%s inode format) ",
2856 oldinofmt ? "old" : "new");
2857 if (header->c_firstrec)
2858 fprintf(stderr, "begins with record %d",
2859 header->c_firstrec);
2860 fprintf(stderr, "\n");
2861 previno = 0x7fffffff;
2862 return;
2863 }
2864 if (previno == 0x7fffffff)
2865 goto newcalc;
2866 switch (prevtype) {
2867 case TS_BITS:
2868 fprintf(stderr, "Dumped inodes map header");
2869 break;
2870 case TS_CLRI:
2871 fprintf(stderr, "Used inodes map header");
2872 break;
2873 case TS_INODE:
2874 fprintf(stderr, "File header, ino %lu", (unsigned long)previno);
2875 break;
2876 case TS_ADDR:
2877 fprintf(stderr, "File continuation header, ino %ld", (long)previno);
2878 break;
2879 case TS_END:
2880 fprintf(stderr, "End of tape header");
2881 break;
2882 }
2883 if (predict != blksread - 1)
2884 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
2885 predict, blksread - 1);
2886 fprintf(stderr, "\n");
2887 newcalc:
2888 blks = 0;
2889 if (header->c_type != TS_END)
2890 for (i = 0; i < header->c_count; i++)
2891 if (readmapflag || header->c_addr[i] != 0)
2892 blks++;
2893 predict = blks;
2894 blksread = 0;
2895 prevtype = header->c_type;
2896 previno = header->c_inumber;
2897 }
2898
2899 /*
2900 * Find an inode header.
2901 * Complain if had to skip, and complain is set.
2902 */
2903 static void
2904 findinode(struct s_spcl *header)
2905 {
2906 static long skipcnt = 0;
2907 long i;
2908 char buf[TP_BSIZE];
2909
2910 curfile.name = "<name unknown>";
2911 curfile.action = UNKNOWN;
2912 curfile.dip = NULL;
2913 curfile.ino = 0;
2914 do {
2915 if (header->c_magic != NFS_MAGIC) {
2916 skipcnt++;
2917 while (gethead(header) == FAIL ||
2918 header->c_date != dumpdate)
2919 skipcnt++;
2920 }
2921 switch (header->c_type) {
2922
2923 case TS_ADDR:
2924 /*
2925 * Skip up to the beginning of the next record
2926 */
2927 for (i = 0; i < header->c_count; i++)
2928 if (header->c_addr[i])
2929 readtape(buf);
2930 while (gethead(header) == FAIL ||
2931 header->c_date != dumpdate)
2932 skipcnt++;
2933 break;
2934
2935 case TS_INODE:
2936 curfile.dip = &header->c_dinode;
2937 curfile.ino = header->c_inumber;
2938 break;
2939
2940 case TS_END:
2941 curfile.ino = maxino;
2942 break;
2943
2944 case TS_CLRI:
2945 curfile.name = "<file removal list>";
2946 break;
2947
2948 case TS_BITS:
2949 curfile.name = "<file dump list>";
2950 break;
2951
2952 case TS_TAPE:
2953 panic("unexpected tape header\n");
2954 /* NOTREACHED */
2955
2956 default:
2957 panic("unknown tape header type %d\n", spcl.c_type);
2958 /* NOTREACHED */
2959
2960 }
2961 } while (header->c_type == TS_ADDR);
2962 if (skipcnt > 0)
2963 #ifdef USE_QFA
2964 if (!noresyncmesg)
2965 #endif
2966 fprintf(stderr, "resync restore, skipped %ld blocks\n",
2967 skipcnt);
2968 skipcnt = 0;
2969 }
2970
2971 static int
2972 checksum(int *buf)
2973 {
2974 int i, j;
2975
2976 j = sizeof(union u_spcl) / sizeof(int);
2977 i = 0;
2978 if(!Bcvt) {
2979 do
2980 i += *buf++;
2981 while (--j);
2982 } else {
2983 /* What happens if we want to read restore tapes
2984 for a 16bit int machine??? */
2985 do
2986 i += swabi(*buf++);
2987 while (--j);
2988 }
2989
2990 if (i != CHECKSUM) {
2991 fprintf(stderr, "Checksum error %o, inode %lu file %s\n", i,
2992 (unsigned long)curfile.ino, curfile.name);
2993 return(FAIL);
2994 }
2995 return(GOOD);
2996 }
2997
2998 #ifdef RRESTORE
2999 #ifdef __STDC__
3000 #include <stdarg.h>
3001 #else
3002 #include <varargs.h>
3003 #endif
3004
3005 void
3006 #ifdef __STDC__
3007 msg(const char *fmt, ...)
3008 #else
3009 msg(fmt, va_alist)
3010 char *fmt;
3011 va_dcl
3012 #endif
3013 {
3014 va_list ap;
3015 #ifdef __STDC__
3016 va_start(ap, fmt);
3017 #else
3018 va_start(ap);
3019 #endif
3020 (void)vfprintf(stderr, fmt, ap);
3021 va_end(ap);
3022 }
3023 #endif /* RRESTORE */
3024
3025 static u_char *
3026 swab16(u_char *sp, int n)
3027 {
3028 char c;
3029
3030 while (--n >= 0) {
3031 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
3032 sp += 2;
3033 }
3034 return (sp);
3035 }
3036
3037 static u_char *
3038 swab32(u_char *sp, int n)
3039 {
3040 char c;
3041
3042 while (--n >= 0) {
3043 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
3044 c = sp[1]; sp[1] = sp[2]; sp[2] = c;
3045 sp += 4;
3046 }
3047 return (sp);
3048 }
3049
3050 static u_char *
3051 swab64(u_char *sp, int n)
3052 {
3053 char c;
3054
3055 while (--n >= 0) {
3056 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
3057 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
3058 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
3059 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
3060 sp += 8;
3061 }
3062 return (sp);
3063 }
3064
3065 void
3066 swabst(u_char *cp, u_char *sp)
3067 {
3068 int n = 0;
3069
3070 while (*cp) {
3071 switch (*cp) {
3072 case '0': case '1': case '2': case '3': case '4':
3073 case '5': case '6': case '7': case '8': case '9':
3074 n = (n * 10) + (*cp++ - '0');
3075 continue;
3076
3077 case 's': case 'w': case 'h':
3078 if (n == 0)
3079 n = 1;
3080 sp = swab16(sp, n);
3081 break;
3082
3083 case 'i':
3084 if (n == 0)
3085 n = 1;
3086 sp = swab32(sp, n);
3087 break;
3088
3089 case 'l':
3090 if (n == 0)
3091 n = 1;
3092 sp = swab64(sp, n);
3093 break;
3094
3095 default: /* Any other character, like 'b' counts as byte. */
3096 if (n == 0)
3097 n = 1;
3098 sp += n;
3099 break;
3100 }
3101 cp++;
3102 n = 0;
3103 }
3104 }
3105
3106 static u_int
3107 swabi(u_int x)
3108 {
3109 swabst((u_char *)"i", (u_char *)&x);
3110 return (x);
3111 }
3112
3113 #if 0
3114 static u_long
3115 swabl(u_long x)
3116 {
3117 swabst((u_char *)"l", (u_char *)&x);
3118 return (x);
3119 }
3120 #endif
3121
3122 void
3123 RequestVol(long tnum)
3124 {
3125 FLUSHTAPEBUF();
3126 getvol(tnum);
3127 }
3128
3129 #ifdef USE_QFA
3130 #ifdef sunos
3131 extern int fdsmtc;
3132
3133 struct uscsi_cmd {
3134 int uscsi_flags; /* read, write, etc. see below */
3135 short uscsi_status; /* resulting status */
3136 short uscsi_timeout; /* Command Timeout */
3137 caddr_t uscsi_cdb; /* cdb to send to target */
3138 caddr_t uscsi_bufaddr; /* i/o source/destination */
3139 u_int uscsi_buflen; /* size of i/o to take place */
3140 u_int uscsi_resid; /* resid from i/o operation */
3141 u_char uscsi_cdblen; /* # of valid cdb bytes */
3142 u_char uscsi_rqlen; /* size of uscsi_rqbuf */
3143 u_char uscsi_rqstatus; /* status of request sense cmd */
3144 u_char uscsi_rqresid; /* resid of request sense cmd */
3145 caddr_t uscsi_rqbuf; /* request sense buffer */
3146 void *uscsi_reserved_5; /* Reserved for Future Use */
3147 };
3148
3149 #define CDB_GROUP0 6 /* 6-byte cdb's */
3150 #define CDB_GROUP1 10 /* 10-byte cdb's */
3151 #define CDB_GROUP2 10 /* 10-byte cdb's */
3152 #define CDB_GROUP3 0 /* reserved */
3153 #define CDB_GROUP4 16 /* 16-byte cdb's */
3154 #define CDB_GROUP5 12 /* 12-byte cdb's */
3155 #define CDB_GROUP6 0 /* reserved */
3156 #define CDB_GROUP7 0 /* reserved */
3157
3158 #define USCSI_WRITE 0x00000 /* send data to device */
3159 #define USCSI_SILENT 0x00001 /* no error messages */
3160 #define USCSI_DIAGNOSE 0x00002 /* fail if any error occurs */
3161 #define USCSI_ISOLATE 0x00004 /* isolate from normal commands */
3162 #define USCSI_READ 0x00008 /* get data from device */
3163 #define USCSI_RESET 0x04000 /* Reset target */
3164 #define USCSI_RESET_ALL 0x08000 /* Reset all targets */
3165 #define USCSI_RQENABLE 0x10000 /* Enable Request Sense extensions */
3166
3167 #define USCSIIOC (0x04 << 8)
3168 #define USCSICMD (USCSIIOC|201) /* user scsi command */
3169
3170 #define USCSI_TIMEOUT 30
3171 #define USCSI_SHORT_TIMEOUT 900
3172 #define USCSI_LONG_TIMEOUT 14000
3173
3174 #define B(s,i) ((unsigned char)((s) >> i))
3175 #define B1(s) ((unsigned char)(s))
3176
3177 #define MSB4(s,v) *(s)=B(v,24),(s)[1]=B(v,16), (s)[2]=B(v,8), (s)[3]=B1(v)
3178
3179
3180 int
3181 GetTapePos(long long *pos)
3182 {
3183 int err = 0;
3184 struct uscsi_cmd scmd;
3185 char buf[512];
3186 char parm[512 * 8];
3187 long lpos;
3188
3189 (void)memset((void *)buf, 0, sizeof(buf));
3190 (void)memset((void *)&scmd, 0, sizeof(scmd));
3191 scmd.uscsi_flags = USCSI_READ|USCSI_SILENT;
3192 scmd.uscsi_timeout = USCSI_TIMEOUT;
3193 scmd.uscsi_cdb = buf;
3194 scmd.uscsi_cdblen = CDB_GROUP1;
3195 buf[0] = 0x34; /* read position */
3196 buf[1] = 0;
3197 (void)memset((void *)parm, 0, 512);
3198 scmd.uscsi_bufaddr = parm;
3199 scmd.uscsi_buflen = 56;
3200 if (ioctl(fdsmtc, USCSICMD, &scmd) == -1) {
3201 err = errno;
3202 return err;
3203 }
3204 (void)memcpy(&lpos, &parm[4], sizeof(long));
3205 *pos = lpos;
3206 return err;
3207 }
3208
3209 int
3210 GotoTapePos(long long pos)
3211 {
3212 int err = 0;
3213 struct uscsi_cmd scmd;
3214 char buf[512];
3215 char parm[512 * 8];
3216 long lpos = (long)pos;
3217
3218 (void)memset((void *)buf, 0, sizeof(buf));
3219 (void)memset((void *)&scmd, 0, sizeof(scmd));
3220 scmd.uscsi_flags = USCSI_WRITE|USCSI_SILENT;
3221 scmd.uscsi_timeout = 360; /* 5 Minutes */
3222 scmd.uscsi_cdb = buf;
3223 scmd.uscsi_cdblen = CDB_GROUP1;
3224 buf[0] = 0x2b; /* locate */
3225 buf[1] = 0;
3226 MSB4(&buf[3], lpos);
3227 (void)memset((void *)parm, 0, 512);
3228 scmd.uscsi_bufaddr = NULL;
3229 scmd.uscsi_buflen = 0;
3230 if (ioctl(fdsmtc, USCSICMD, &scmd) == -1) {
3231 err = errno;
3232 return err;
3233 }
3234 return err;
3235 }
3236 #endif
3237
3238 #define LSEEK_GET_TAPEPOS 10
3239 #define LSEEK_GO2_TAPEPOS 11
3240
3241 #ifdef __linux__
3242 typedef struct mt_pos {
3243 short mt_op;
3244 int mt_count;
3245 } MTPosRec, *MTPosPtr;
3246
3247
3248 /*
3249 * get the current position of the tape
3250 */
3251 int
3252 GetTapePos(long long *pos)
3253 {
3254 int err = 0;
3255
3256 #ifdef RDUMP
3257 if (host) {
3258 *pos = (long long) rmtseek((OFF_T)0, (int)LSEEK_GET_TAPEPOS);
3259 err = *pos < 0;
3260 }
3261 else
3262 #endif
3263 {
3264 if (magtapein) {
3265 long mtpos;
3266 *pos = 0;
3267 err = (ioctl(mt, MTIOCPOS, &mtpos) < 0);
3268 *pos = (long long)mtpos;
3269 }
3270 else {
3271 *pos = LSEEK(mt, 0, SEEK_CUR);
3272 err = (*pos < 0);
3273 }
3274 }
3275 if (err) {
3276 err = errno;
3277 fprintf(stdout, "[%ld] error: %d (getting tapepos: %lld)\n",
3278 (unsigned long)getpid(), err, *pos);
3279 return err;
3280 }
3281 return err;
3282 }
3283
3284 /*
3285 * go to specified position on tape
3286 */
3287 int
3288 GotoTapePos(long long pos)
3289 {
3290