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Added EA/ACL support in dump and restore.
[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 1.89 2005/05/02 15:10:46 stelian Exp $";
46 #endif /* not lint */
47
48 #include <config.h>
49 #include <compatlfs.h>
50 #include <sys/types.h>
51 #include <errno.h>
52 #include <compaterr.h>
53 #include <system.h>
54 #include <setjmp.h>
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <string.h>
58 #include <unistd.h>
59
60 #include <sys/param.h>
61 #include <sys/file.h>
62 #include <sys/mtio.h>
63 #include <sys/stat.h>
64
65 #ifdef __linux__
66 #include <sys/time.h>
67 #include <time.h>
68 #ifdef HAVE_EXT2FS_EXT2_FS_H
69 #include <ext2fs/ext2_fs.h>
70 #else
71 #include <linux/ext2_fs.h>
72 #endif
73 #include <ext2fs/ext2fs.h>
74 #include <bsdcompat.h>
75 #else /* __linux__ */
76 #ifdef sunos
77 #define quad_t int64_t
78 #include <sys/time.h>
79 #include <sys/fcntl.h>
80 #include <bsdcompat.h>
81 #else
82 #include <ufs/ufs/dinode.h>
83 #endif
84 #endif /* __linux__ */
85 #ifdef DUMP_MACOSX
86 #include "darwin.h"
87 #endif
88 #include <protocols/dumprestore.h>
89
90 #ifdef HAVE_ZLIB
91 #include <zlib.h>
92 #endif /* HAVE_ZLIB */
93
94 #ifdef HAVE_BZLIB
95 #include <bzlib.h>
96 #endif /* HAVE_BZLIB */
97
98 #ifdef HAVE_LZO
99 #include <minilzo.h>
100 #endif /* HAVE_LZO */
101
102 #include "restore.h"
103 #include "extern.h"
104 #include "pathnames.h"
105
106 #ifdef USE_QFA
107 int noresyncmesg = 0;
108 #endif /* USE_QFA */
109 static long fssize = MAXBSIZE;
110 static int mt = -1;
111 int pipein = 0;
112 static int magtapein = 0; /* input is from magtape */
113 static char magtape[MAXPATHLEN];
114 static char magtapeprefix[MAXPATHLEN];
115 static int blkcnt;
116 static int numtrec;
117 static char *tapebuf; /* input buffer for read */
118 static int bufsize; /* buffer size without prefix */
119 static char *tbufptr = NULL; /* active tape buffer */
120 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
121 static char *comprbuf; /* uncompress work buf */
122 static size_t comprlen; /* size including prefix */
123 #endif
124 static union u_spcl endoftapemark;
125 static long blksread; /* blocks read since last header */
126 static long tpblksread = 0; /* TP_BSIZE blocks read */
127 static long tapesread;
128 static sigjmp_buf restart;
129 static int gettingfile = 0; /* restart has a valid frame */
130 char *host = NULL;
131
132 static int ofile;
133 static char *map;
134 static char lnkbuf[MAXPATHLEN + 1];
135 static int pathlen;
136
137 int oldinofmt; /* old inode format conversion required */
138 int Bcvt; /* Swap Bytes (for CCI or sun) */
139 static int Qcvt; /* Swap quads (for sun) */
140
141 #define FLUSHTAPEBUF() blkcnt = ntrec + 1
142
143 static void accthdr __P((struct s_spcl *));
144 static int checksum __P((int *));
145 static void findinode __P((struct s_spcl *));
146 static void findtapeblksize __P((void));
147 static int gethead __P((struct s_spcl *));
148 static int converthead __P((struct s_spcl *));
149 static void converttapebuf __P((struct tapebuf *));
150 static void readtape __P((char *));
151 static void setdumpnum __P((void));
152 #ifdef DUMP_MACOSX
153 static void xtrfilefinderinfo __P((char *, size_t));
154 #endif
155
156 static u_int swabi __P((u_int));
157 #if 0
158 static u_long swabl __P((u_long));
159 #endif
160 static u_char *swab64 __P((u_char *, int));
161 static u_char *swab32 __P((u_char *, int));
162 static u_char *swab16 __P((u_char *, int));
163 static void terminateinput __P((void));
164 static void xtrfile __P((char *, size_t));
165 static void xtrlnkfile __P((char *, size_t));
166 static void xtrlnkskip __P((char *, size_t));
167 static void xtrmap __P((char *, size_t));
168 static void xtrmapskip __P((char *, size_t));
169 static void xtrskip __P((char *, size_t));
170 static void xtrxattr __P((char *, size_t));
171 static void setmagtapein __P((void));
172 static int extractattr __P((char *));
173 static void compareattr __P((char *));
174
175 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
176 static void newcomprbuf __P((int));
177 static void (*readtape_func) __P((char *));
178 static void readtape_set __P((char *));
179 static void readtape_uncompr __P((char *));
180 static void readtape_comprfile __P((char *));
181 static void readtape_comprtape __P((char *));
182 static char *decompress_tapebuf __P((struct tapebuf *, int));
183 static void msg_read_error __P((char *));
184 #endif
185 static int read_a_block __P((int, char *, size_t, long *));
186 #define PREFIXSIZE sizeof(struct tapebuf)
187
188 #define COMPARE_ONTHEFLY 1
189
190 #if COMPARE_ONTHEFLY
191 static int ifile; /* input file for compare */
192 static int cmperror; /* compare error */
193 static void xtrcmpfile __P((char *, size_t));
194 static void xtrcmpskip __P((char *, size_t));
195 #endif
196
197 static int readmapflag;
198 static int readingmaps; /* set to 1 while reading the maps */
199
200 static char xattrbuf[XATTR_MAXSIZE];
201 static int xattrlen;
202
203 #ifdef DUMP_MACOSX
204 static DumpFinderInfo gFndrInfo;
205 #endif
206
207 /*
208 * Set up an input source. This is called from main.c before setup() is.
209 */
210 void
211 setinput(char *source)
212 {
213 int i;
214 char *n;
215
216 FLUSHTAPEBUF();
217 if (bflag)
218 newtapebuf(ntrec);
219 else
220 newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
221 terminal = stdin;
222
223 #ifdef RRESTORE
224 if ((n = strchr(source, ':'))) {
225 for (i = 0; i < (n - source); i++) {
226 if (source[i] == '/')
227 break;
228 }
229 if (source[i] != '/') {
230 host = source;
231 source = strchr(host, ':');
232 *source++ = '\0';
233 if (rmthost(host) == 0)
234 exit(1);
235 }
236 } else
237 #endif
238 if (strcmp(source, "-") == 0) {
239 /*
240 * Since input is coming from a pipe we must establish
241 * our own connection to the terminal.
242 */
243 terminal = fopen(_PATH_TTY, "r");
244 if (terminal == NULL) {
245 warn("cannot open %s", _PATH_TTY);
246 terminal = fopen(_PATH_DEVNULL, "r");
247 if (terminal == NULL)
248 err(1, "cannot open %s", _PATH_DEVNULL);
249 }
250 pipein++;
251 }
252 setuid(getuid()); /* no longer need or want root privileges */
253 if (Mflag) {
254 strncpy(magtapeprefix, source, MAXPATHLEN);
255 magtapeprefix[MAXPATHLEN-1] = '\0';
256 snprintf(magtape, MAXPATHLEN, "%s%03d", source, 1);
257 }
258 else
259 strncpy(magtape, source, MAXPATHLEN);
260 magtape[MAXPATHLEN - 1] = '\0';
261 }
262
263 void
264 newtapebuf(long size)
265 {
266 static int tapebufsize = -1;
267
268 ntrec = size;
269 bufsize = ntrec * TP_BSIZE;
270 if (size <= tapebufsize)
271 return;
272 if (tapebuf != NULL)
273 free(tapebuf);
274 tapebuf = malloc(size * TP_BSIZE + sizeof(struct tapebuf));
275 if (tapebuf == NULL)
276 errx(1, "Cannot allocate space for tape buffer");
277 tapebufsize = size;
278 }
279
280 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
281 static void
282 newcomprbuf(int size)
283 {
284 size_t buf_size = (size+1) * TP_BSIZE + sizeof(struct tapebuf);
285 if (buf_size <= comprlen)
286 return;
287 comprlen = buf_size;
288 if (comprbuf != NULL)
289 free(comprbuf);
290 comprbuf = malloc(comprlen);
291 if (comprbuf == NULL)
292 errx(1, "Cannot allocate space for decompress buffer");
293 }
294 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
295
296 /*
297 * Verify that the tape drive can be accessed and
298 * that it actually is a dump tape.
299 */
300 void
301 setup(void)
302 {
303 int i, j, *ip, bot_code;
304 struct STAT stbuf;
305 char *temptape;
306
307 Vprintf(stdout, "Verify tape and initialize maps\n");
308 if (Afile == NULL && bot_script) {
309 msg("Launching %s\n", bot_script);
310 bot_code = system_command(bot_script, magtape, 1);
311 if (bot_code != 0 && bot_code != 1) {
312 msg("Restore aborted by the beginning of tape script\n");
313 exit(1);
314 }
315 }
316
317 if (Afile)
318 temptape = Afile;
319 else
320 temptape = magtape;
321
322 #ifdef RRESTORE
323 if (!Afile && host)
324 mt = rmtopen(temptape, O_RDONLY);
325 else
326 #endif
327 if (pipein)
328 mt = 0;
329 else
330 mt = OPEN(temptape, O_RDONLY, 0);
331 if (mt < 0)
332 err(1, "%s", temptape);
333 if (!Afile) {
334 volno = 1;
335 setmagtapein();
336 setdumpnum();
337 }
338 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
339 readtape_func = readtape_set;
340 #if defined(HAVE_LZO)
341 if (lzo_init() != LZO_E_OK) {
342 msg("internal error - lzo_init failed \n");
343 exit(1);
344 }
345 #endif
346 #endif
347 FLUSHTAPEBUF();
348 findtapeblksize();
349 if (gethead(&spcl) == FAIL) {
350 blkcnt--; /* push back this block */
351 blksread--;
352 tpblksread--;
353 cvtflag++;
354 if (gethead(&spcl) == FAIL)
355 errx(1, "Tape is not a dump tape");
356 fprintf(stderr, "Converting to new file system format.\n");
357 }
358
359 if (zflag) {
360 fprintf(stderr, "Dump tape is compressed.\n");
361 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB) && !defined(HAVE_LZO)
362 errx(1,"This restore version doesn't support decompression");
363 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
364 }
365 if (pipein) {
366 endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC;
367 endoftapemark.s_spcl.c_type = TS_END;
368 ip = (int *)&endoftapemark;
369 j = sizeof(union u_spcl) / sizeof(int);
370 i = 0;
371 do
372 i += *ip++;
373 while (--j);
374 endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
375 }
376 if (vflag || command == 't' || command == 'C')
377 printdumpinfo();
378 #ifdef USE_QFA
379 if (tapeposflag && (unsigned long)spcl.c_date != qfadumpdate)
380 errx(1, "different QFA/dumpdates detected\n");
381 #endif
382 if (filesys[0] == '\0') {
383 char *dirptr;
384 strncpy(filesys, spcl.c_filesys, NAMELEN);
385 filesys[NAMELEN - 1] = '\0';
386 dirptr = strstr(filesys, " (dir");
387 if (dirptr != NULL)
388 *dirptr = '\0';
389 }
390 dumptime = spcl.c_ddate;
391 dumpdate = spcl.c_date;
392 if (STAT(".", &stbuf) < 0)
393 err(1, "cannot stat .");
394 if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
395 fssize = TP_BSIZE;
396 if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
397 fssize = stbuf.st_blksize;
398 if (((fssize - 1) & fssize) != 0)
399 errx(1, "bad block size %ld", fssize);
400 if (spcl.c_volume != 1)
401 errx(1, "Tape is not volume 1 of the dump");
402 if (gethead(&spcl) == FAIL) {
403 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
404 panic("no header after volume mark!\n");
405 }
406 readingmaps = 1;
407 findinode(&spcl);
408 if (spcl.c_type != TS_CLRI)
409 errx(1, "Cannot find file removal list");
410 maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
411 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
412 if (map == NULL)
413 errx(1, "no memory for active inode map");
414 usedinomap = map;
415 curfile.action = USING;
416 getfile(xtrmap, xtrmapskip);
417 while (spcl.c_type == TS_ADDR) {
418 /* Recompute maxino and the map */
419 dump_ino_t oldmaxino = maxino;
420 maxino += (spcl.c_count * TP_BSIZE * NBBY) + 1;
421 resizemaps(oldmaxino, maxino);
422 map = usedinomap;
423
424 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
425 getfile(xtrmap, xtrmapskip);
426 }
427 Dprintf(stdout, "maxino = %lu\n", (unsigned long)maxino);
428 if (spcl.c_type != TS_BITS) {
429 if (spcl.c_type == TS_END) {
430 msg("Cannot find file dump list, assuming empty tape\n");
431 exit(0);
432 }
433 errx(1, "Cannot find file dump list");
434 }
435 map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
436 if (map == (char *)NULL)
437 errx(1, "no memory for file dump list");
438 dumpmap = map;
439 curfile.action = USING;
440 getfile(xtrmap, xtrmapskip);
441 while (spcl.c_type == TS_ADDR) {
442 spcl.c_dinode.di_size = spcl.c_count * TP_BSIZE;
443 getfile(xtrmap, xtrmapskip);
444 }
445 /*
446 * If there may be whiteout entries on the tape, pretend that the
447 * whiteout inode exists, so that the whiteout entries can be
448 * extracted.
449 */
450 if (oldinofmt == 0)
451 SETINO(WINO, dumpmap);
452 readingmaps = 0;
453 findinode(&spcl);
454 }
455
456 /*
457 * Prompt user to load a new dump volume.
458 * "Nextvol" is the next suggested volume to use.
459 * This suggested volume is enforced when doing full
460 * or incremental restores, but can be overridden by
461 * the user when only extracting a subset of the files.
462 */
463 void
464 getvol(long nextvol)
465 {
466 long newvol = 0, wantnext = 0, i;
467 long saved_blksread = 0, saved_tpblksread = 0;
468 union u_spcl tmpspcl;
469 # define tmpbuf tmpspcl.s_spcl
470 char buf[TP_BSIZE];
471 int haderror = 0, bot_code = 1;
472
473 if (nextvol == 1) {
474 tapesread = 0;
475 gettingfile = 0;
476 tpblksread = 0;
477 blksread = 0;
478 }
479 if (pipein) {
480 if (nextvol != 1)
481 panic("Changing volumes on pipe input?\n");
482 if (volno == 1)
483 return;
484 goto gethdr;
485 }
486 saved_blksread = blksread;
487 saved_tpblksread = tpblksread;
488 #if defined(USE_QFA) && defined(sunos)
489 if (createtapeposflag || tapeposflag)
490 close(fdsmtc);
491 #endif
492 again:
493 if (pipein)
494 exit(1); /* pipes do not get a second chance */
495 if (aflag || curfile.action != SKIP) {
496 newvol = nextvol;
497 wantnext = 1;
498 } else {
499 newvol = 0;
500 wantnext = 0;
501 }
502 while (newvol <= 0) {
503 if (tapesread == 0) {
504 fprintf(stderr, "%s%s%s%s%s",
505 "You have not read any volumes yet.\n",
506 "Unless you know which volume your",
507 " file(s) are on you should start\n",
508 "with the last volume and work",
509 " towards the first.\n");
510 } else {
511 fprintf(stderr, "You have read volumes");
512 strcpy(buf, ": ");
513 for (i = 1; i < 32; i++)
514 if (tapesread & (1 << i)) {
515 fprintf(stderr, "%s%ld", buf, (long)i);
516 strcpy(buf, ", ");
517 }
518 fprintf(stderr, "\n");
519 }
520 do {
521 fprintf(stderr, "Specify next volume # (none if no more volumes): ");
522 (void) fflush(stderr);
523 (void) fgets(buf, TP_BSIZE, terminal);
524 } while (!feof(terminal) && buf[0] == '\n');
525 if (feof(terminal))
526 exit(1);
527 if (!strcmp(buf, "none\n")) {
528 terminateinput();
529 return;
530 }
531 newvol = atoi(buf);
532 if (newvol <= 0) {
533 fprintf(stderr,
534 "Volume numbers are positive numerics\n");
535 }
536 }
537 if (newvol == volno) {
538 tapesread |= 1 << volno;
539 #if defined(USE_QFA) && defined(sunos)
540 if (createtapeposflag || tapeposflag) {
541 if (OpenSMTCmt(magtape) < 0) {
542 volno = -1;
543 haderror = 1;
544 goto again;
545 }
546 }
547 #endif /* USE_QFA */
548 return;
549 }
550 closemt();
551
552 /*
553 * if using an archive file, reset its name so readtape()
554 * could properly use remote access.
555 */
556 Afile = NULL;
557
558 if (Mflag) {
559 snprintf(magtape, MAXPATHLEN, "%s%03ld", magtapeprefix, newvol);
560 magtape[MAXPATHLEN - 1] = '\0';
561 }
562 if (bot_script && !haderror) {
563 msg("Launching %s\n", bot_script);
564 bot_code = system_command(bot_script, magtape, newvol);
565 if (bot_code != 0 && bot_code != 1) {
566 msg("Restore aborted by the beginning of tape script\n");
567 exit(1);
568 }
569 }
570 if (haderror || (bot_code && !Mflag)) {
571 haderror = 0;
572 #ifdef sunos
573 fprintf(stderr, "Mount volume %ld\n", (long)newvol);
574 #else
575 fprintf(stderr, "Mount tape volume %ld\n", (long)newvol);
576 #endif
577 fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
578 #ifdef sunos
579 fprintf(stderr, "then enter volume name (default: %s) ", magtape);
580 #else
581 fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
582 #endif
583 (void) fflush(stderr);
584 (void) fgets(buf, TP_BSIZE, terminal);
585 if (feof(terminal))
586 exit(1);
587 if (!strcmp(buf, "none\n")) {
588 terminateinput();
589 return;
590 }
591 if (buf[0] != '\n') {
592 char *pos;
593 (void) strncpy(magtape, buf, sizeof(magtape));
594 magtape[sizeof(magtape) - 1] = '\0';
595 if ((pos = strchr(magtape, '\n')))
596 magtape[pos - magtape] = '\0';
597 }
598 }
599 #if defined(USE_QFA) && defined(sunos)
600 if (createtapeposflag || tapeposflag) {
601 if (OpenSMTCmt(magtape) < 0) {
602 volno = -1;
603 haderror = 1;
604 goto again;
605 }
606 }
607 #endif /* USE_QFA */
608 #ifdef RRESTORE
609 if (host)
610 mt = rmtopen(magtape, O_RDONLY);
611 else
612 #endif
613 mt = OPEN(magtape, O_RDONLY, 0);
614
615 if (mt == -1) {
616 fprintf(stderr, "Cannot open %s\n", magtape);
617 volno = -1;
618 haderror = 1;
619 goto again;
620 }
621 gethdr:
622 setmagtapein();
623 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
624 readtape_func = readtape_set;
625 #endif
626 volno = newvol;
627 setdumpnum();
628 FLUSHTAPEBUF();
629 findtapeblksize();
630 if (gethead(&tmpbuf) == FAIL) {
631 Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
632 fprintf(stderr, "tape is not dump tape\n");
633 volno = 0;
634 haderror = 1;
635 blksread = saved_blksread;
636 tpblksread = saved_tpblksread;
637 goto again;
638 }
639 if (tmpbuf.c_volume != volno) {
640 fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume);
641 volno = 0;
642 haderror = 1;
643 blksread = saved_blksread;
644 tpblksread = saved_tpblksread;
645 goto again;
646 }
647 if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
648 fprintf(stderr, "Wrong dump date\n\tgot: %s",
649 #ifdef sunos
650 ctime(&tmpbuf.c_date));
651 #else
652 ctime4(&tmpbuf.c_date));
653 #endif
654 fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
655 volno = 0;
656 haderror = 1;
657 blksread = saved_blksread;
658 tpblksread = saved_tpblksread;
659 goto again;
660 }
661 tapesread |= 1 << volno;
662 /*
663 * If continuing from the previous volume, skip over any
664 * blocks read already at the end of the previous volume.
665 *
666 * If coming to this volume at random, skip to the beginning
667 * of the next record.
668 */
669 if (zflag) {
670 fprintf(stderr, "Dump tape is compressed.\n");
671 #if !defined(HAVE_ZLIB) && !defined(HAVE_BZLIB) && !defined(HAVE_LZO)
672 errx(1,"This restore version doesn't support decompression");
673 #endif /* !HAVE_ZLIB && !HAVE_BZLIB */
674 }
675 Dprintf(stdout, "read %ld recs, tape starts with %ld\n",
676 tpblksread - 1, (long)tmpbuf.c_firstrec);
677 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
678 if (!wantnext) {
679 tpblksread = tmpbuf.c_firstrec + 1;
680 for (i = tmpbuf.c_count; i > 0; i--)
681 readtape(buf);
682 } else if (tmpbuf.c_firstrec > 0 &&
683 tmpbuf.c_firstrec < tpblksread - 1) {
684 /*
685 * -1 since we've read the volume header
686 */
687 i = tpblksread - tmpbuf.c_firstrec - 1;
688 Dprintf(stderr, "Skipping %ld duplicate record%s.\n",
689 (long)i, i > 1 ? "s" : "");
690 while (--i >= 0)
691 readtape(buf);
692 }
693 }
694 if (curfile.action == USING) {
695 if (volno == 1)
696 panic("active file into volume 1\n");
697 return;
698 }
699 /*
700 * Skip up to the beginning of the next record
701 */
702 if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
703 for (i = tmpbuf.c_count; i > 0; i--)
704 readtape(buf);
705 (void) gethead(&spcl);
706 findinode(&spcl);
707 if (gettingfile) {
708 gettingfile = 0;
709 siglongjmp(restart, 1);
710 }
711 }
712
713 /*
714 * Handle unexpected EOF.
715 */
716 static void
717 terminateinput(void)
718 {
719
720 if (gettingfile && curfile.action == USING) {
721 printf("Warning: %s %s\n",
722 "End-of-input encountered while extracting", curfile.name);
723 }
724 curfile.name = "<name unknown>";
725 curfile.action = UNKNOWN;
726 curfile.dip = NULL;
727 curfile.ino = maxino;
728 if (gettingfile) {
729 gettingfile = 0;
730 siglongjmp(restart, 1);
731 }
732 }
733
734 /*
735 * handle multiple dumps per tape by skipping forward to the
736 * appropriate one.
737 */
738 static void
739 setdumpnum(void)
740 {
741 struct mtop tcom;
742
743 if (dumpnum == 1 || volno != 1)
744 return;
745 if (pipein)
746 errx(1, "Cannot have multiple dumps on pipe input");
747 tcom.mt_op = MTFSF;
748 tcom.mt_count = dumpnum - 1;
749 #ifdef RRESTORE
750 if (host) {
751 if (rmtioctl(MTFSF, dumpnum - 1) < 0) {
752 fprintf(stderr, "rmtioctl MTFSF: %s\n", strerror(errno));
753 exit(1);
754 }
755 } else
756 #endif
757 if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0) {
758 fprintf(stderr, "rmtioctl MTFSF: %s\n", strerror(errno));
759 exit(1);
760 /* warn("ioctl MTFSF"); */
761 }
762 }
763
764 void
765 printdumpinfo(void)
766 {
767 #ifdef sunos
768 Vprintf(stdout, "Dump date: %s", ctime(&spcl.c_date));
769 Vprintf(stdout, "Dumped from: %s",
770 (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&spcl.c_ddate));
771 if (spcl.c_host[0] == '\0')
772 return;
773 Vprintf(stdout, "Level %d dump of %s on %s:%s\n",
774 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
775 Vprintf(stdout, "Label: %s\n", spcl.c_label);
776 #else
777 fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date));
778 fprintf(stdout, "Dumped from: %s",
779 (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate));
780 if (spcl.c_host[0] == '\0')
781 return;
782 fprintf(stdout, "Level %d dump of %s on %s:%s\n",
783 spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
784 fprintf(stdout, "Label: %s\n", spcl.c_label);
785 #endif
786 }
787
788 void
789 printvolinfo(void)
790 {
791 int i;
792
793 if (volinfo[1] == ROOTINO) {
794 printf("Starting inode numbers by volume:\n");
795 for (i = 1; i < (int)TP_NINOS && volinfo[i] != 0; ++i)
796 printf("\tVolume %d: %lu\n", i, (unsigned long)volinfo[i]);
797 }
798 }
799
800
801 int
802 extractfile(struct entry *ep, int doremove)
803 {
804 unsigned int flags;
805 mode_t mode;
806 struct timeval timep[2];
807 char *name = myname(ep);
808
809 /* If removal is requested (-r mode) do remove it unless
810 * we are extracting a metadata only inode */
811 if (spcl.c_flags & DR_METAONLY) {
812 Vprintf(stdout, "file %s is metadata only\n", name);
813 }
814 else {
815 if (doremove) {
816 removeleaf(ep);
817 ep->e_flags &= ~REMOVED;
818 }
819 }
820
821 curfile.name = name;
822 curfile.action = USING;
823 #if defined(__linux__) || defined(sunos)
824 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
825 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
826 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
827 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
828 #else /* __linux__ || sunos */
829 timep[0].tv_sec = curfile.dip->di_atime;
830 timep[0].tv_usec = curfile.dip->di_atimensec / 1000;
831 timep[1].tv_sec = curfile.dip->di_mtime;
832 timep[1].tv_usec = curfile.dip->di_mtimensec / 1000;
833 #endif /* __linux__ */
834 mode = curfile.dip->di_mode;
835 flags = curfile.dip->di_flags;
836 switch (mode & IFMT) {
837
838 default:
839 fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
840 skipfile();
841 return (FAIL);
842
843 case IFSOCK:
844 Vprintf(stdout, "skipped socket %s\n", name);
845 skipfile();
846 return (GOOD);
847
848 case IFDIR:
849 {
850 int ret;
851 if (mflag) {
852 if (ep == NULL || ep->e_flags & EXTRACT)
853 panic("unextracted directory %s\n", name);
854 skipfile();
855 return (GOOD);
856 }
857 Vprintf(stdout, "extract dir %s\n", name);
858 ret = genliteraldir(name, curfile.ino);
859 extractattr(name);
860 return ret;
861 }
862
863 case IFLNK:
864 {
865 #ifdef HAVE_LCHOWN
866 uid_t luid = curfile.dip->di_uid;
867 gid_t lgid = curfile.dip->di_gid;
868 #endif
869 if (! (spcl.c_flags & DR_METAONLY)) {
870 lnkbuf[0] = '\0';
871 pathlen = 0;
872 getfile(xtrlnkfile, xtrlnkskip);
873 if (pathlen == 0) {
874 Vprintf(stdout,
875 "%s: zero length symbolic link (ignored)\n", name);
876 return (GOOD);
877 }
878 if (linkit(lnkbuf, name, SYMLINK) == FAIL)
879 return (FAIL);
880 }
881 else
882 skipfile();
883
884 #ifdef HAVE_LCHOWN
885 (void) lchown(name, luid, lgid);
886 #endif
887 extractattr(name);
888 return (GOOD);
889 }
890
891 case IFIFO:
892 Vprintf(stdout, "extract fifo %s\n", name);
893 if (Nflag) {
894 skipfile();
895 return (GOOD);
896 }
897 if (! (spcl.c_flags & DR_METAONLY)) {
898 if (uflag && !Nflag)
899 (void)unlink(name);
900 if (mkfifo(name, mode) < 0) {
901 warn("%s: cannot create fifo", name);
902 skipfile();
903 return (FAIL);
904 }
905 }
906 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
907 (void) chmod(name, mode);
908 if (flags)
909 #ifdef __linux__
910 (void) lsetflags(name, flags);
911 #else
912 #ifdef sunos
913 {
914 warn("%s: cannot call chflags", name);
915 /* (void) chflags(name, flags); */
916 }
917 #else
918 (void) chflags(name, flags);
919 #endif
920 #endif
921 skipfile();
922 extractattr(name);
923 utimes(name, timep);
924 return (GOOD);
925
926 case IFCHR:
927 case IFBLK:
928 Vprintf(stdout, "extract special file %s\n", name);
929 if (Nflag) {
930 skipfile();
931 return (GOOD);
932 }
933 if (! (spcl.c_flags & DR_METAONLY)) {
934 if (uflag)
935 (void)unlink(name);
936 if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) {
937 warn("%s: cannot create special file", name);
938 skipfile();
939 return (FAIL);
940 }
941 }
942 (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid);
943 (void) chmod(name, mode);
944 if (flags)
945 #ifdef __linux__
946 {
947 warn("%s: lsetflags called on a special file", name);
948 (void) lsetflags(name, flags);
949 }
950 #else
951 #ifdef sunos
952 {
953 warn("%s: cannot call chflags on a special file", name);
954 /* (void) chflags(name, flags); */
955 }
956 #else
957 {
958 warn("%s: chflags called on a special file", name);
959 (void) chflags(name, flags);
960 }
961 #endif
962 #endif
963 skipfile();
964 extractattr(name);
965 utimes(name, timep);
966 return (GOOD);
967
968 case IFREG:
969 {
970 uid_t luid = curfile.dip->di_uid;
971 gid_t lgid = curfile.dip->di_gid;
972
973 Vprintf(stdout, "extract file %s\n", name);
974 if (Nflag) {
975 skipfile();
976 return (GOOD);
977 }
978 if (! (spcl.c_flags & DR_METAONLY)) {
979 if (uflag)
980 (void)unlink(name);
981 if ((ofile = OPEN(name, O_WRONLY | O_CREAT | O_TRUNC,
982 0666)) < 0) {
983 warn("%s: cannot create file", name);
984 skipfile();
985 return (FAIL);
986 }
987 getfile(xtrfile, xtrskip);
988 (void) close(ofile);
989 }
990 else
991 skipfile();
992 (void) chown(name, luid, lgid);
993 (void) chmod(name, mode);
994 if (flags)
995 #ifdef __linux__
996 (void) lsetflags(name, flags);
997 #else
998 #ifdef sunos
999 {
1000 warn("%s: cannot call chflags", name);
1001 /* (void) chflags(name, flags); */
1002 }
1003 #else
1004 (void) chflags(name, flags);
1005 #endif
1006 #endif
1007 extractattr(name);
1008 utimes(name, timep);
1009 return (GOOD);
1010 }
1011 }
1012 /* NOTREACHED */
1013 }
1014
1015 static int
1016 extractattr(char *path)
1017 {
1018 while (spcl.c_flags & DR_EXTATTRIBUTES) {
1019 switch (spcl.c_extattributes) {
1020 case EXT_MACOSFNDRINFO:
1021 #ifdef DUMP_MACOSX
1022 (void)extractfinderinfoufs(path);
1023 #else
1024 msg("MacOSX not supported in this version, skipping\n");
1025 skipfile();
1026 #endif
1027 break;
1028 case EXT_MACOSRESFORK:
1029 #ifdef DUMP_MACOSX
1030 (void)extractresourceufs(path);
1031 #else
1032 msg("MacOSX not supported in this version, skipping\n");
1033 skipfile();
1034 #endif
1035 break;
1036 case EXT_XATTR: {
1037 char xattr[XATTR_MAXSIZE];
1038
1039 if (readxattr(xattr) == GOOD) {
1040 xattr_extract(path, xattr);
1041 break;
1042 }
1043 }
1044 default:
1045 msg("unexpected inode extension %ld, skipping\n", spcl.c_extattributes);
1046 skipfile();
1047 break;
1048 }
1049 }
1050 return GOOD;
1051 }
1052
1053 #ifdef DUMP_MACOSX
1054 int
1055 extractfinderinfoufs(char *name)
1056 {
1057 int err;
1058 char oFileRsrc[MAXPATHLEN];
1059 int flags;
1060 mode_t mode;
1061 struct timeval timep[2];
1062 u_int32_t uid;
1063 u_int32_t gid;
1064 char path[MAXPATHLEN], fname[MAXPATHLEN];
1065
1066 curfile.name = name;
1067 curfile.action = USING;
1068 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
1069 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
1070 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
1071 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
1072 mode = curfile.dip->di_mode;
1073 flags = curfile.dip->di_flags;
1074 uid = curfile.dip->di_uid;
1075 gid = curfile.dip->di_gid;
1076
1077 switch (mode & IFMT) {
1078
1079 default:
1080 fprintf(stderr, "%s: (extr. finfoufs) unknown file mode 0%o\n", name, mode);
1081 skipfile();
1082 return (FAIL);
1083
1084 case IFDIR:
1085 fprintf(stderr, "%s: (extr. finfoufs[IFDIR]) unknown file mode 0%o\n", name, mode);
1086 skipfile();
1087 return (FAIL);
1088
1089 case IFLNK:
1090 skipfile();
1091 return (GOOD);
1092
1093 case IFREG:
1094 Vprintf(stdout, "extract finderinfo file %s\n", name);
1095 if (Nflag) {
1096 skipfile();
1097 return (GOOD);
1098 }
1099 getfile(xtrfilefinderinfo, xtrskip);
1100
1101 GetPathFile(name, path, fname);
1102 strcpy(oFileRsrc, path);
1103 strcat(oFileRsrc, "._");
1104 strcat(oFileRsrc, fname);
1105
1106 if ((err = CreateAppleDoubleFileRes(oFileRsrc, &gFndrInfo.fndrinfo,
1107 mode, flags, timep, uid, gid)) != 0) {
1108 fprintf(stderr, "%s: cannot create finderinfo: %s\n",
1109 name, strerror(errno));
1110 skipfile();
1111 return (FAIL);
1112 }
1113 return (GOOD);
1114 }
1115 /* NOTREACHED */
1116 }
1117
1118
1119 int
1120 extractresourceufs(char *name)
1121 {
1122 char oFileRsrc[MAXPATHLEN];
1123 int flags;
1124 mode_t mode;
1125 struct timeval timep[2];
1126 char path[MAXPATHLEN], fname[MAXPATHLEN];
1127 ASDHeaderPtr hp;
1128 ASDEntryPtr ep;
1129 u_long loff;
1130 u_int32_t uid;
1131 u_int32_t gid;
1132 u_int64_t di_size;
1133 char *p;
1134 char buf[1024];
1135
1136 curfile.name = name;
1137 curfile.action = USING;
1138 timep[0].tv_sec = curfile.dip->di_atime.tv_sec;
1139 timep[0].tv_usec = curfile.dip->di_atime.tv_usec;
1140 timep[1].tv_sec = curfile.dip->di_mtime.tv_sec;
1141 timep[1].tv_usec = curfile.dip->di_mtime.tv_usec;
1142 mode = curfile.dip->di_mode;
1143 flags = curfile.dip->di_flags;
1144 uid = curfile.dip->di_uid;
1145 gid = curfile.dip->di_gid;
1146 di_size = curfile.dip->di_size;
1147
1148 switch (mode & IFMT) {
1149
1150 default:
1151 fprintf(stderr, "%s: (extr. resufs) unknown file mode 0%o\n", name, mode);
1152 skipfile();
1153 return (FAIL);
1154
1155 case IFDIR:
1156 fprintf(stderr, "%s: (extr. resufs [IFDIR]) unknown file mode 0%o\n", name, mode);
1157 skipfile();
1158 return (FAIL);
1159
1160 case IFLNK:
1161 skipfile();
1162 return (GOOD);
1163
1164 case IFREG:
1165 Vprintf(stdout, "extract resource file %s\n", name);
1166 if (Nflag) {
1167 skipfile();
1168 return (GOOD);
1169 }
1170
1171 GetPathFile(name, path, fname);
1172 strcpy(oFileRsrc, path);
1173 strcat(oFileRsrc, "._");
1174 strcat(oFileRsrc, fname);
1175
1176 if ((ofile = open(oFileRsrc, O_RDONLY, 0)) < 0) {
1177 fprintf(stderr, "%s: cannot read finderinfo: %s\n",
1178 name, strerror(errno));
1179 skipfile();
1180 return (FAIL);
1181 }
1182 read(ofile, buf, 70);
1183 (void) close(ofile);
1184 p = buf;
1185 hp = (ASDHeaderPtr)p;
1186 /* the header */
1187 hp->entries++;
1188 p += sizeof(ASDHeader) - CORRECT;
1189 ep = (ASDEntryPtr)p;
1190 /* the finderinfo entry */
1191 ep->offset += sizeof(ASDEntry);
1192 loff = ep->offset;
1193
1194 p += sizeof(ASDEntry);
1195 /* the finderinfo data */
1196 bcopy(p, p + sizeof(ASDEntry), INFOLEN);
1197 ep = (ASDEntryPtr)p;
1198 /* the new resourcefork entry */
1199 ep->entryID = EntryRSRCFork;
1200 ep->offset = loff + INFOLEN;
1201 ep->len = di_size;
1202 /* write the new appledouble entries to the file */
1203 if ((ofile = open(oFileRsrc, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
1204 fprintf(stderr, "%s: cannot create resource file: %s\n",
1205 name, strerror(errno));
1206 skipfile();
1207 return (FAIL);
1208 }
1209 write(ofile, buf, 70 + sizeof(ASDEntry));
1210 /* and add the resource data from tape */
1211 getfile(xtrfile, xtrskip);
1212
1213 (void) fchown(ofile, uid, gid);
1214 (void) fchmod(ofile, mode);
1215 (void) close(ofile);
1216 (void) lsetflags(oFileRsrc, flags);
1217 utimes(oFileRsrc, timep);
1218 return (GOOD);
1219 }
1220 /* NOTREACHED */
1221 }
1222 #endif /* DUMP_MACOSX */
1223
1224 int
1225 readxattr(char *buffer)
1226 {
1227 if (dflag)
1228 msg("reading EA data for inode %lu\n", curfile.ino);
1229
1230 curfile.name = "EA block";
1231 if (curfile.dip->di_size > XATTR_MAXSIZE) {
1232 fprintf(stderr, "EA size too big (%ld)", (long)curfile.dip->di_size);
1233 skipfile();
1234 return (FAIL);
1235 }
1236
1237 memset(xattrbuf, 0, XATTR_MAXSIZE);
1238 xattrlen = 0;
1239
1240 getfile(xtrxattr, xtrnull);
1241
1242 memcpy(buffer, xattrbuf, XATTR_MAXSIZE);
1243
1244 return (GOOD);
1245 }
1246
1247 /*
1248 * skip over bit maps on the tape
1249 */
1250 void
1251 skipmaps(void)
1252 {
1253
1254 while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
1255 skipfile();
1256 }
1257
1258 /*
1259 * skip over a file on the tape
1260 */
1261 void
1262 skipfile(void)
1263 {
1264
1265 curfile.action = SKIP;
1266 getfile(xtrnull, xtrnull);
1267 }
1268
1269 /*
1270 * skip over any extended attributes.
1271 */
1272 void
1273 skipxattr(void)
1274 {
1275
1276 while (spcl.c_flags & DR_EXTATTRIBUTES)
1277 skipfile();
1278 }
1279
1280 /*
1281 * Extract a file from the tape.
1282 * When an allocated block is found it is passed to the fill function;
1283 * when an unallocated block (hole) is found, a zeroed buffer is passed
1284 * to the skip function.
1285 */
1286 void
1287 getfile(void (*fill) __P((char *, size_t)), void (*skip) __P((char *, size_t)))
1288 {
1289 int i;
1290 volatile int curblk = 0;
1291 volatile quad_t size = spcl.c_dinode.di_size;
1292 volatile int last_write_was_hole = 0;
1293 quad_t origsize = size;
1294 static char clearedbuf[MAXBSIZE];
1295 char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
1296 char junk[TP_BSIZE];
1297
1298 if (spcl.c_type == TS_END)
1299 panic("ran off end of tape\n");
1300 if (spcl.c_magic != NFS_MAGIC)
1301 panic("not at beginning of a file\n");
1302 if (!gettingfile && setjmp(restart) != 0)
1303 return;
1304 gettingfile++;
1305 loop:
1306 for (i = 0; i < spcl.c_count; i++) {
1307 if (readmapflag || spcl.c_addr[i]) {
1308 readtape(&buf[curblk++][0]);
1309 if (curblk == fssize / TP_BSIZE) {
1310 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
1311 fssize : (curblk - 1) * TP_BSIZE + size));
1312 curblk = 0;
1313 last_write_was_hole = 0;
1314 }
1315 } else {
1316 if (curblk > 0) {
1317 (*fill)((char *)buf, (size_t)(size > TP_BSIZE ?
1318 curblk * TP_BSIZE :
1319 (curblk - 1) * TP_BSIZE + size));
1320 curblk = 0;
1321 }
1322 (*skip)(clearedbuf, (long)(size > TP_BSIZE ?
1323 TP_BSIZE : size));
1324 last_write_was_hole = 1;
1325 }
1326 if ((size -= TP_BSIZE) <= 0) {
1327 for (i++; i < spcl.c_count; i++)
1328 if (readmapflag || spcl.c_addr[i])
1329 readtape(junk);
1330 break;
1331 }
1332 }
1333 if (gethead(&spcl) == GOOD && size > 0) {
1334 if (spcl.c_type == TS_ADDR)
1335 goto loop;
1336 Dprintf(stdout,
1337 "Missing address (header) block for %s at %ld blocks\n",
1338 curfile.name, (long)blksread);
1339 }
1340 if (curblk > 0) {
1341 (*fill)((char *)buf, (size_t)((curblk * TP_BSIZE) + size));
1342 last_write_was_hole = 0;
1343 }
1344 if (size > 0) {
1345 fprintf(stderr, "Missing blocks at the end of %s, assuming hole\n", curfile.name);
1346 while (size > 0) {
1347 size_t skp = size > TP_BSIZE ? TP_BSIZE : size;
1348 (*skip)(clearedbuf, skp);
1349 size -= skp;
1350 }
1351 last_write_was_hole = 1;
1352 }
1353 if (last_write_was_hole) {
1354 FTRUNCATE(ofile, origsize);
1355 }
1356 if (!readingmaps)
1357 findinode(&spcl);
1358 gettingfile = 0;
1359 }
1360
1361 /*
1362 * Write out the next block of a file.
1363 */
1364 static void
1365 xtrfile(char *buf, size_t size)
1366 {
1367
1368 if (Nflag)
1369 return;
1370 if (write(ofile, buf, (int) size) == -1)
1371 err(1, "write error extracting inode %lu, name %s\nwrite",
1372 (unsigned long)curfile.ino, curfile.name);
1373 }
1374
1375 #ifdef DUMP_MACOSX
1376 static void
1377 xtrfilefinderinfo(char *buf, size_t size)
1378 {
1379 bcopy(buf, &gFndrInfo, size);
1380 }
1381 #endif /* DUMP_MACOSX */
1382
1383 /*
1384 * Skip over a hole in a file.
1385 */
1386 /* ARGSUSED */
1387 static void
1388 xtrskip(UNUSED(char *buf), size_t size)
1389 {
1390
1391 if (LSEEK(ofile, (OFF_T)size, SEEK_CUR) == -1)
1392 err(1, "seek error extracting inode %lu, name %s\nlseek",
1393 (unsigned long)curfile.ino, curfile.name);
1394 }
1395
1396 /*
1397 * Collect the next block of a symbolic link.
1398 */
1399 static void
1400 xtrlnkfile(char *buf, size_t size)
1401 {
1402
1403 pathlen += size;
1404 if (pathlen > MAXPATHLEN) {
1405 buf[size - 1] = '\0';
1406 errx(1, "symbolic link name: %s->%s%s; too long %d",
1407 curfile.name, lnkbuf, buf, pathlen);
1408 }
1409 (void) strcat(lnkbuf, buf);
1410 lnkbuf[pathlen] = '\0';
1411 }
1412
1413 /*
1414 * Skip over a hole in a symbolic link (should never happen).
1415 */
1416 /* ARGSUSED */
1417 static void
1418 xtrlnkskip(UNUSED(char *buf), UNUSED(size_t size))
1419 {
1420
1421 errx(1, "unallocated block in symbolic link %s", curfile.name);
1422 }
1423
1424 /*
1425 * Collect the next block of a bit map.
1426 */
1427 static void
1428 xtrmap(char *buf, size_t size)
1429 {
1430
1431 memmove(map, buf, size);
1432 map += size;
1433 }
1434
1435 /*
1436 * Skip over a hole in a bit map (should never happen).
1437 */
1438 /* ARGSUSED */
1439 static void
1440 xtrmapskip(UNUSED(char *buf), size_t size)
1441 {
1442
1443 panic("hole in map\n");
1444 map += size;
1445 }
1446
1447 /*
1448 * Noop, when an extraction function is not needed.
1449 */
1450 /* ARGSUSED */
1451 void
1452 xtrnull(UNUSED(char *buf), UNUSED(size_t size))
1453 {
1454
1455 return;
1456 }
1457
1458 #if COMPARE_ONTHEFLY
1459 /*
1460 * Compare the next block of a file.
1461 */
1462 static void
1463 xtrcmpfile(char *buf, size_t size)
1464 {
1465 static char cmpbuf[MAXBSIZE];
1466
1467 if (cmperror)
1468 return;
1469
1470 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1471 fprintf(stderr, "%s: size has changed.\n",
1472 curfile.name);
1473 cmperror = 1;
1474 return;
1475 }
1476
1477 if (memcmp(buf, cmpbuf, size) != 0) {
1478 fprintf(stderr, "%s: tape and disk copies are different\n",
1479 curfile.name);
1480 cmperror = 1;
1481 return;
1482 }
1483 }
1484
1485 /*
1486 * Skip over a hole in a file.
1487 */
1488 static void
1489 xtrcmpskip(UNUSED(char *buf), size_t size)
1490 {
1491 static char cmpbuf[MAXBSIZE];
1492 int i;
1493
1494 if (cmperror)
1495 return;
1496
1497 if (read(ifile, cmpbuf, size) != (ssize_t)size) {
1498 fprintf(stderr, "%s: size has changed.\n",
1499 curfile.name);
1500 cmperror = 1;
1501 return;
1502 }
1503
1504 for (i = 0; i < (int)size; ++i)
1505 if (cmpbuf[i] != '\0') {
1506 fprintf(stderr, "%s: tape and disk copies are different\n",
1507 curfile.name);
1508 cmperror = 1;
1509 return;
1510 }
1511 }
1512 #endif /* COMPARE_ONTHEFLY */
1513
1514 static void
1515 xtrxattr(char *buf, size_t size)
1516 {
1517 if (xattrlen + size > XATTR_MAXSIZE) {
1518 fprintf(stderr, "EA size too big (%ld)", (long)xattrlen + size);
1519 return;
1520 }
1521 memcpy(xattrbuf + xattrlen, buf, size);
1522 xattrlen += size;
1523 }
1524
1525 #if !COMPARE_ONTHEFLY
1526 static int
1527 do_cmpfiles(int fd_tape, int fd_disk, OFF_T size)
1528 {
1529 static char buf_tape[BUFSIZ];
1530 static char buf_disk[BUFSIZ];
1531 ssize_t n_tape;
1532 ssize_t n_disk;
1533
1534 while (size > 0) {
1535 if ((n_tape = read(fd_tape, buf_tape, sizeof(buf_tape))) < 1) {
1536 close(fd_tape), close(fd_disk);
1537 panic("do_cmpfiles: unexpected EOF[1]");
1538 }
1539 if ((n_disk = read(fd_disk, buf_disk, sizeof(buf_tape))) < 1) {
1540 close(fd_tape), close(fd_disk);
1541 panic("do_cmpfiles: unexpected EOF[2]");
1542 }
1543 if (n_tape != n_disk) {
1544 close(fd_tape), close(fd_disk);
1545 panic("do_cmpfiles: sizes different!");
1546 }
1547 if (memcmp(buf_tape, buf_disk, (size_t)n_tape) != 0) return (1);
1548 size -= n_tape;
1549 }
1550 return (0);
1551 }
1552
1553 /* for debugging compare problems */
1554 #undef COMPARE_FAIL_KEEP_FILE
1555
1556 static
1557 #ifdef COMPARE_FAIL_KEEP_FILE
1558 /* return true if tapefile should be unlinked after compare */
1559 int
1560 #else
1561 void
1562 #endif
1563 cmpfiles(char *tapefile, char *diskfile, struct STAT *sbuf_disk)
1564 {
1565 struct STAT sbuf_tape;
1566 int fd_tape, fd_disk;
1567
1568 if (STAT(tapefile, &sbuf_tape) != 0) {
1569 panic("can't lstat tmp file %s: %s\n", tapefile,
1570 strerror(errno));
1571 do_compare_error;
1572 }
1573
1574 if (sbuf_disk->st_size != sbuf_tape.st_size) {
1575 fprintf(stderr,
1576 "%s: size changed from %lld to %lld.\n",
1577 diskfile, (long long)sbuf_tape.st_size, (long long)sbuf_disk->st_size);
1578 do_compare_error;
1579 #ifdef COMPARE_FAIL_KEEP_FILE
1580 return (0);
1581 #else
1582 return;
1583 #endif
1584 }
1585
1586 if ((fd_tape = OPEN(tapefile, O_RDONLY)) < 0) {
1587 panic("can't open %s: %s\n", tapefile, strerror(errno));
1588 do_compare_error;
1589 }
1590 if ((fd_disk = OPEN(diskfile, O_RDONLY)) < 0) {
1591 close(fd_tape);
1592 panic("can't open %s: %s\n", diskfile, strerror(errno));
1593 do_compare_error;
1594 }
1595
1596 if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) {
1597 fprintf(stderr, "%s: tape and disk copies are different\n",
1598 diskfile);
1599 close(fd_tape);
1600 close(fd_disk);
1601 do_compare_error;
1602 #ifdef COMPARE_FAIL_KEEP_FILE
1603 /* rename the file to live in /tmp */
1604 /* rename `tapefile' to /tmp/<basename of diskfile> */
1605 {
1606 char *p = strrchr(diskfile, '/');
1607 char newname[MAXPATHLEN];
1608 if (!p) {
1609 panic("can't find / in %s\n", diskfile);
1610 }
1611 snprintf(newname, sizeof(newname), "%s/debug/%s", tmpdir, p + 1);
1612 if (rename(tapefile, newname)) {
1613 panic("rename from %s to %s failed: %s\n",
1614 tapefile, newname,
1615 strerror(errno));
1616 } else {
1617 fprintf(stderr, "*** %s saved to %s\n",
1618 tapefile, newname);
1619 }
1620 }
1621
1622 /* don't unlink the file (it's not there anymore */
1623 /* anyway) */
1624 return (0);
1625 #else
1626 return;
1627 #endif
1628 }
1629 close(fd_tape);
1630 close(fd_disk);
1631 #ifdef COMPARE_FAIL_KEEP_FILE
1632 return (1);
1633 #endif
1634 }
1635 #endif /* !COMPARE_ONTHEFLY */
1636
1637 static void
1638 compareattr(char *name)
1639 {
1640 int xattr_done = 0;
1641
1642 while (spcl.c_flags & DR_EXTATTRIBUTES) {
1643 switch (spcl.c_extattributes) {
1644 case EXT_MACOSFNDRINFO:
1645 msg("MacOSX not supported for comparision in this version, skipping\n");
1646 skipfile();
1647 break;
1648 case EXT_MACOSRESFORK:
1649 msg("MacOSX not supported for comparision in this version, skipping\n");
1650 skipfile();
1651 break;
1652 case EXT_XATTR: {
1653 char xattr[XATTR_MAXSIZE];
1654
1655 if (readxattr(xattr) == GOOD) {
1656 if (xattr_compare(name, xattr) == FAIL)
1657 do_compare_error;
1658 xattr_done = 1;
1659 }
1660 else
1661 do_compare_error;
1662 break;
1663 }
1664 default:
1665 msg("unexpected inode extension %ld, skipping\n", spcl.c_extattributes);
1666 skipfile();
1667 break;
1668 }
1669 }
1670 if (!xattr_done && xattr_compare(name, NULL) == FAIL)
1671 do_compare_error;
1672 }
1673
1674 #if !COMPARE_ONTHEFLY
1675 static char tmpfilename[MAXPATHLEN];
1676 #endif
1677
1678 void
1679 comparefile(char *name)
1680 {
1681 mode_t mode;
1682 uid_t uid;
1683 uid_t gid;
1684 unsigned int flags;
1685 unsigned long newflags;
1686 struct STAT sb;
1687 int r;
1688 #if !COMPARE_ONTHEFLY
1689 static char *tmpfile = NULL;
1690 struct STAT stemp;
1691 #endif
1692 curfile.name = name;
1693 curfile.action = USING;
1694 mode = curfile.dip->di_mode;
1695 flags = curfile.dip->di_flags;
1696 uid = curfile.dip->di_uid;
1697 gid = curfile.dip->di_gid;
1698
1699 if ((mode & IFMT) == IFSOCK) {
1700 Vprintf(stdout, "skipped socket %s\n", name);
1701 skipfile();
1702 return;
1703 }
1704
1705 if ((r = LSTAT(name, &sb)) != 0) {
1706 warn("unable to stat %s", name);
1707 do_compare_error;
1708 skipfile();
1709 return;
1710 }
1711
1712 Vprintf(stdout, "comparing %s (size: %lld, mode: 0%o)\n", name,
1713 (long long)sb.st_size, mode);
1714
1715 if (sb.st_mode != mode) {
1716 fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n",
1717 name, mode & 07777, sb.st_mode & 07777);
1718 do_compare_error;
1719 }
1720 if (sb.st_uid != uid) {
1721 fprintf(stderr, "%s: uid changed from %d to %d.\n",
1722 name, uid, sb.st_uid);
1723 do_compare_error;
1724 }
1725 if (sb.st_gid != gid) {
1726 fprintf(stderr, "%s: gid changed from %d to %d.\n",
1727 name, gid, sb.st_gid);
1728 do_compare_error;
1729 }
1730 #ifdef __linux__
1731 if (lgetflags(name, &newflags) < 0) {
1732 if (flags != 0) {
1733 warn("%s: lgetflags failed", name);
1734 do_compare_error;
1735 }
1736 }
1737 else {
1738 if (newflags != flags) {
1739 fprintf(stderr, "%s: flags changed from 0x%08x to 0x%08lx.\n",
1740 name, flags, newflags);
1741 do_compare_error;
1742 }
1743 }
1744 #endif
1745 if (spcl.c_flags & DR_METAONLY) {
1746 skipfile();
1747 return;
1748 }
1749 switch (mode & IFMT) {
1750 default:
1751 skipfile();
1752 return;
1753
1754 case IFSOCK:
1755 skipfile();
1756 return;
1757
1758 case IFDIR:
1759 skipfile();
1760 compareattr(name);
1761 return;
1762
1763 case IFLNK: {
1764 char lbuf[MAXPATHLEN + 1];
1765 int lsize;
1766
1767 if (!(sb.st_mode & S_IFLNK)) {
1768 fprintf(stderr, "%s: is no longer a symbolic link\n",
1769 name);
1770 do_compare_error;
1771 return;
1772 }
1773 lnkbuf[0] = '\0';
1774 pathlen = 0;
1775 getfile(xtrlnkfile, xtrlnkskip);
1776 if (pathlen == 0) {
1777 fprintf(stderr,
1778 "%s: zero length symbolic link (ignored)\n",
1779 name);
1780 do_compare_error;
1781 return;
1782 }
1783 if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) {
1784 panic("readlink of %s failed: %s\n", name,
1785 strerror(errno));
1786 do_compare_error;
1787 }
1788 lbuf[lsize] = 0;
1789 if (strcmp(lbuf, lnkbuf) != 0) {
1790 fprintf(stderr,
1791 "%s: symbolic link changed from %s to %s.\n",
1792 name, lnkbuf, lbuf);
1793 do_compare_error;
1794 return;
1795 }
1796 compareattr(name);
1797 return;
1798 }
1799
1800 case IFCHR:
1801 case IFBLK:
1802 if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) {
1803 fprintf(stderr, "%s: no longer a special file\n",
1804 name);
1805 do_compare_error;
1806 skipfile();
1807 return;
1808 }
1809
1810 if (sb.st_rdev != (dev_t)curfile.dip->di_rdev) {
1811 fprintf(stderr,
1812 "%s: device changed from %d,%d to %d,%d.\n",
1813 name,
1814 major(curfile.dip->di_rdev),
1815 minor(curfile.dip->di_rdev),
1816 major(sb.st_rdev),
1817 minor(sb.st_rdev));
1818 do_compare_error;
1819 }
1820 skipfile();
1821 compareattr(name);
1822 return;
1823
1824 case IFREG:
1825 #if COMPARE_ONTHEFLY
1826 if ((ifile = OPEN(name, O_RDONLY)) < 0) {
1827 warn("can't open %s", name);
1828 skipfile();
1829 do_compare_error;
1830 }
1831 else {
1832 cmperror = 0;
1833 getfile(xtrcmpfile, xtrcmpskip);
1834 if (!cmperror) {
1835 char c;
1836 if (read(ifile, &c, 1) != 0) {
1837 fprintf(stderr, "%s: size has changed.\n",
1838 name);
1839 cmperror = 1;
1840 }
1841 }
1842 if (cmperror)
1843 do_compare_error;
1844 close(ifile);
1845 }
1846 #else
1847 if (tmpfile == NULL) {
1848 /* argument to mktemp() must not be in RO space: */
1849 snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir);
1850 tmpfile = mktemp(&tmpfilename[0]);
1851 }
1852 if ((STAT(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) {
1853 panic("cannot delete tmp file %s: %s\n",
1854 tmpfile, strerror(errno));
1855 }
1856 if ((ofile = OPEN(tmpfile, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) {
1857 panic("cannot create file temp file %s: %s\n",
1858 name, strerror(errno));
1859 }
1860 getfile(xtrfile, xtrskip);
1861 (void) close(ofile);
1862 #ifdef COMPARE_FAIL_KEEP_FILE
1863 if (cmpfiles(tmpfile, name, &sb))
1864 unlink(tmpfile);
1865 #else
1866 cmpfiles(tmpfile, name, &sb);
1867 unlink(tmpfile);
1868 #endif
1869 #endif /* COMPARE_ONTHEFLY */
1870 compareattr(name);
1871 return;
1872 }
1873 /* NOTREACHED */
1874 }
1875
1876 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1877 static void (*readtape_func)(char *) = readtape_set;
1878
1879 /*
1880 * Read TP_BSIZE blocks from the input.
1881 * Handle read errors, and end of media.
1882 * Decompress compressed blocks.
1883 */
1884 static void
1885 readtape(char *buf)
1886 {
1887 (*readtape_func)(buf); /* call the actual processing routine */
1888 }
1889
1890 /*
1891 * Set function pointer for readtape() routine. zflag and magtapein must
1892 * be correctly set before the first call to readtape().
1893 */
1894 static void
1895 readtape_set(char *buf)
1896 {
1897 if (!zflag)
1898 readtape_func = readtape_uncompr;
1899 else {
1900 newcomprbuf(ntrec);
1901 if (magtapein)
1902 readtape_func = readtape_comprtape;
1903 else
1904 readtape_func = readtape_comprfile;
1905 }
1906 readtape(buf);
1907 }
1908
1909 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
1910
1911 /*
1912 * This is the original readtape(), it's used for reading uncompressed input.
1913 * Read TP_BSIZE blocks from the input.
1914 * Handle read errors, and end of media.
1915 */
1916 static void
1917 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
1918 readtape_uncompr(char *buf)
1919 #else
1920 readtape(char *buf)
1921 #endif
1922 {
1923 ssize_t rd, newvol, i;
1924 int cnt, seek_failed;
1925
1926 if (blkcnt < numtrec) {
1927 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
1928 blksread++;
1929 tpblksread++;
1930 return;
1931 }
1932 tbufptr = tapebuf;
1933 for (i = 0; i < ntrec; i++)
1934 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1935 if (numtrec == 0)
1936 numtrec = ntrec;
1937 cnt = ntrec * TP_BSIZE;
1938 rd = 0;
1939 #ifdef USE_QFA
1940 if (createtapeposflag)
1941 (void)GetTapePos(&curtapepos);
1942 #endif
1943 getmore:
1944 #ifdef RRESTORE
1945 if (!Afile && host)
1946 i = rmtread(&tapebuf[rd], cnt);
1947 else
1948 #endif
1949 i = read(mt, &tapebuf[rd], cnt);
1950
1951 /*
1952 * Check for mid-tape short read error.
1953 * If found, skip rest of buffer and start with the next.
1954 */
1955 if (!pipein && numtrec < ntrec && i > 0) {
1956 Dprintf(stdout, "mid-media short read error.\n");
1957 numtrec = ntrec;
1958 }
1959 /*
1960 * Handle partial block read.
1961 */
1962 if (pipein && i == 0 && rd > 0)
1963 i = rd;
1964 else if (i > 0 && i != ntrec * TP_BSIZE) {
1965 if (pipein) {
1966 rd += i;
1967 cnt -= i;
1968 if (cnt > 0)
1969 goto getmore;
1970 i = rd;
1971 } else {
1972 /*
1973 * Short read. Process the blocks read.
1974 */
1975 if (i % TP_BSIZE != 0)
1976 Vprintf(stdout,
1977 "partial block read: %ld should be %ld\n",
1978 (long)i, ntrec * TP_BSIZE);
1979 numtrec = i / TP_BSIZE;
1980 }
1981 }
1982 /*
1983 * Handle read error.
1984 */
1985 if (i < 0) {
1986 fprintf(stderr, "Tape read error while ");
1987 switch (curfile.action) {
1988 default:
1989 fprintf(stderr, "trying to set up tape\n");
1990 break;
1991 case UNKNOWN:
1992 fprintf(stderr, "trying to resynchronize\n");
1993 break;
1994 case USING:
1995 fprintf(stderr, "restoring %s\n", curfile.name);
1996 break;
1997 case SKIP:
1998 fprintf(stderr, "skipping over inode %lu\n",
1999 (unsigned long)curfile.ino);
2000 break;
2001 }
2002 if (!yflag && !reply("continue"))
2003 exit(1);
2004 i = ntrec * TP_BSIZE;
2005 memset(tapebuf, 0, (size_t)i);
2006 #ifdef RRESTORE
2007 if (!Afile && host)
2008 seek_failed = (rmtseek(i, 1) < 0);
2009 else
2010 #endif
2011 seek_failed = (LSEEK(mt, i, SEEK_CUR) == (OFF_T)-1);
2012
2013 if (seek_failed) {
2014 warn("continuation failed");
2015 if (!yflag && !reply("assume end-of-tape and continue"))
2016 exit(1);
2017 i = 0;
2018 }
2019 }
2020 /*
2021 * Handle end of tape.
2022 */
2023 if (i == 0) {
2024 Vprintf(stdout, "End-of-tape encountered\n");
2025 if (!pipein) {
2026 newvol = volno + 1;
2027 volno = 0;
2028 numtrec = 0;
2029 getvol(newvol);
2030 readtape(buf);
2031 return;
2032 }
2033 if (rd % TP_BSIZE != 0)
2034 panic("partial block read: %d should be %d\n",
2035 rd, ntrec * TP_BSIZE);
2036 terminateinput();
2037 memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE);
2038 }
2039 blkcnt = 0;
2040 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2041 blksread++;
2042 tpblksread++;
2043 }
2044
2045 #if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) || defined(HAVE_LZO)
2046
2047 /*
2048 * Read a compressed format block from a file or pipe and uncompress it.
2049 * Attempt to handle read errors, and end of file.
2050 */
2051 static void
2052 readtape_comprfile(char *buf)
2053 {
2054 long rl, size, i, ret;
2055 int newvol;
2056 struct tapebuf *tpb;
2057
2058 if (blkcnt < numtrec) {
2059 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2060 blksread++;
2061 tpblksread++;
2062 return;
2063 }
2064 /* need to read the next block */
2065 tbufptr = tapebuf;
2066 for (i = 0; i < ntrec; i++)
2067 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2068 numtrec = ntrec;
2069 tpb = (struct tapebuf *) tapebuf;
2070
2071 /* read the block prefix */
2072 ret = read_a_block(mt, tapebuf, PREFIXSIZE, &rl);
2073 converttapebuf(tpb);
2074
2075 if (Vflag && (ret == 0 || rl < (int)PREFIXSIZE || tpb->length == 0))
2076 ret = 0;
2077 if (ret <= 0)
2078 goto readerr;
2079
2080 /* read the data */
2081 size = tpb->length;
2082 if (size > bufsize) {
2083 /* something's wrong */
2084 Vprintf(stdout, "Prefix size error, max size %d, got %ld\n",
2085 bufsize, size);
2086 size = bufsize;
2087 tpb->length = bufsize;
2088 }
2089 ret = read_a_block(mt, tpb->buf, size, &rl);
2090 if (ret <= 0)
2091 goto readerr;
2092
2093 tbufptr = decompress_tapebuf(tpb, rl + PREFIXSIZE);
2094 if (tbufptr == NULL) {
2095 msg_read_error("File decompression error while");
2096 if (!yflag && !reply("continue"))
2097 exit(1);
2098 memset(tapebuf, 0, bufsize);
2099 tbufptr = tapebuf;
2100 }
2101
2102 blkcnt = 0;
2103 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2104 blksread++;
2105 tpblksread++;
2106 return;
2107
2108 readerr:
2109 /* Errors while reading from a file or pipe are catastrophic. Since
2110 * there are no block boundaries, it's impossible to bypass the
2111 * block in error and find the start of the next block.
2112 */
2113 if (ret == 0) {
2114 /* It's possible to have multiple input files using -M
2115 * and -f file1,file2...
2116 */
2117 Vprintf(stdout, "End-of-File encountered\n");
2118 if (!pipein) {
2119 newvol = volno + 1;
2120 volno = 0;
2121 numtrec = 0;
2122 getvol(newvol);
2123 readtape(buf);
2124 return;
2125 }
2126 }
2127 msg_read_error("Read error while");
2128 /* if (!yflag && !reply("continue")) */
2129 exit(1);
2130 }
2131
2132 /*
2133 * Read compressed data from a tape and uncompress it.
2134 * Handle read errors, and end of media.
2135 * Since a tape consists of separate physical blocks, we try
2136 * to recover from errors by repositioning the tape to the next
2137 * block.
2138 */
2139 static void
2140 readtape_comprtape(char *buf)
2141 {
2142 long rl, size, i;
2143 int ret, newvol;
2144 struct tapebuf *tpb;
2145 struct mtop tcom;
2146
2147 if (blkcnt < numtrec) {
2148 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2149 blksread++;
2150 tpblksread++;
2151 return;
2152 }
2153 /* need to read the next block */
2154 tbufptr = tapebuf;
2155 for (i = 0; i < ntrec; i++)
2156 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2157 numtrec = ntrec;
2158 tpb = (struct tapebuf *) tapebuf;
2159
2160 /* read the block */
2161 size = bufsize + PREFIXSIZE;
2162 ret = read_a_block(mt, tapebuf, size, &rl);
2163 if (ret <= 0)
2164 goto readerr;
2165
2166 converttapebuf(tpb);
2167 tbufptr = decompress_tapebuf(tpb, rl);
2168 if (tbufptr == NULL) {
2169 msg_read_error("Tape decompression error while");
2170 if (!yflag && !reply("continue"))
2171 exit(1);
2172 memset(tapebuf, 0, PREFIXSIZE + bufsize);
2173 tbufptr = tapebuf;
2174 }
2175 goto moverecord;
2176
2177 readerr:
2178 /* Handle errors: EOT switches to the next volume, other errors
2179 * attempt to position the tape to the next block.
2180 */
2181 if (ret == 0) {
2182 Vprintf(stdout, "End-of-tape encountered\n");
2183 newvol = volno + 1;
2184 volno = 0;
2185 numtrec = 0;
2186 getvol(newvol);
2187 readtape(buf);
2188 return;
2189 }
2190
2191 msg_read_error("Tape read error while");
2192 if (!yflag && !reply("continue"))
2193 exit(1);
2194 memset(tapebuf, 0, PREFIXSIZE + bufsize);
2195 tbufptr = tapebuf;
2196
2197 #ifdef RRESTORE
2198 if (host)
2199 rl = rmtioctl(MTFSR, 1);
2200 else
2201 #endif
2202 {
2203 tcom.mt_op = MTFSR;
2204 tcom.mt_count = 1;
2205 rl = ioctl(mt, MTIOCTOP, &tcom);
2206 }
2207
2208 if (rl < 0) {
2209 warn("continuation failed");
2210 if (!yflag && !reply("assume end-of-tape and continue"))
2211 exit(1);
2212 ret = 0; /* end of tape */
2213 goto readerr;
2214 }
2215
2216 moverecord:
2217 blkcnt = 0;
2218 memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
2219 blksread++;
2220 tpblksread++;
2221 }
2222
2223 /*
2224 * Decompress a struct tapebuf into a buffer. readsize is the size read
2225 * from the tape/file and is used for error messages. Returns a pointer
2226 * to the location of the uncompressed buffer or NULL on errors.
2227 * Adjust numtrec and complain for a short block.
2228 */
2229 static char *
2230 decompress_tapebuf(struct tapebuf *tpbin, int readsize)
2231 {
2232 /* If zflag is on, all blocks have a struct tapebuf prefix */
2233 /* zflag gets set in setup() from the dump header */
2234 int cresult, blocklen;
2235 unsigned long worklen;
2236 char *output = NULL,*reason = NULL, *lengtherr = NULL;
2237
2238 /* build a length error message */
2239 blocklen = tpbin->length;
2240 if (readsize < blocklen + (int)PREFIXSIZE)
2241 lengtherr = "short";
2242 else
2243 if (readsize > blocklen + (int)PREFIXSIZE)
2244 lengtherr = "long";
2245
2246 worklen = comprlen;
2247 cresult = 1;
2248 if (tpbin->compressed) {
2249 /* uncompress whatever we read, if it fails, complain later */
2250 if (tpbin->flags == COMPRESS_ZLIB) {
2251 #ifndef HAVE_ZLIB
2252 errx(1,"This restore version doesn't support zlib decompression");
2253 #else
2254 cresult = uncompress(comprbuf, &worklen,
2255 tpbin->buf, blocklen);
2256 output = comprbuf;
2257 switch (cresult) {
2258 case Z_OK:
2259 break;
2260 case Z_MEM_ERROR:
2261 reason = "not enough memory";
2262 break;
2263 case Z_BUF_ERROR:
2264 reason = "buffer too small";
2265 break;
2266 case Z_DATA_ERROR:
2267 reason = "data error";
2268 break;
2269 default:
2270 reason = "unknown";
2271 }
2272 if (cresult == Z_OK)
2273 cresult = 1;
2274 else
2275 cresult = 0;
2276 #endif /* HAVE_ZLIB */
2277 }
2278 if (tpbin->flags == COMPRESS_BZLIB) {
2279 #ifndef HAVE_BZLIB
2280 errx(1,"This restore version doesn't support bzlib decompression");
2281 #else
2282 unsigned int worklen2 = worklen;
2283 cresult = BZ2_bzBuffToBuffDecompress(
2284 comprbuf, &worklen2,
2285 tpbin->buf, blocklen, 0, 0);
2286 worklen = worklen2;
2287 output = comprbuf;
2288 switch (cresult) {
2289 case BZ_OK:
2290 break;
2291 case BZ_MEM_ERROR:
2292 reason = "not enough memory";
2293 break;
2294 case BZ_OUTBUFF_FULL:
2295 reason = "buffer too small";
2296 break;
2297 case BZ_DATA_ERROR:
2298 case BZ_DATA_ERROR_MAGIC:
2299 case BZ_UNEXPECTED_EOF:
2300 reason = "data error";
2301 break;
2302 default:
2303 reason = "unknown";
2304 }
2305 if (cresult == BZ_OK)
2306 cresult = 1;
2307 else
2308 cresult = 0;
2309 #endif /* HAVE_BZLIB */
2310 }
2311 if (tpbin->flags == COMPRESS_LZO) {
2312 #ifndef HAVE_LZO
2313 errx(1,"This restore version doesn't support lzo decompression");
2314 #else
2315 lzo_uint worklen2 = worklen;
2316 cresult = lzo1x_decompress(tpbin->buf, blocklen,
2317 comprbuf, &worklen2, NULL);
2318 worklen = worklen2;
2319 output = comprbuf;
2320 switch (cresult) {
2321 case LZO_E_OK:
2322 break;
2323 case LZO_E_ERROR:
2324 case LZO_E_EOF_NOT_FOUND:
2325 reason = "data error";
2326 break;
2327 default:
2328 reason = "unknown";
2329 }
2330 if (cresult == LZO_E_OK)
2331 cresult = 1;
2332 else
2333 cresult = 0;
2334 #endif /* HAVE_LZO */
2335 }
2336 }
2337 else {
2338 output = tpbin->buf;
2339 worklen = blocklen;
2340 }
2341 if (cresult) {
2342 numtrec = worklen / TP_BSIZE;
2343 if (worklen % TP_BSIZE != 0)
2344 reason = "length mismatch";
2345 }
2346 if (reason) {
2347 if (lengtherr)
2348 fprintf(stderr, "%s compressed block: %d expected: %u\n",
2349 lengtherr, readsize, tpbin->length + PREFIXSIZE);
2350 fprintf(stderr, "decompression error, block %ld: %s\n",
2351 tpblksread+1, reason);
2352 if (!cresult)
2353 output = NULL;
2354 }
2355 return output;
2356 }
2357
2358 /*
2359 * Print an error message for a read error.
2360 * This was exteracted from the original readtape().
2361 */
2362 static void
2363 msg_read_error(char *m)
2364 {
2365 switch (curfile.action) {
2366 default:
2367 fprintf(stderr, "%s trying to set up tape\n", m);
2368 break;
2369 case UNKNOWN:
2370 fprintf(stderr, "%s trying to resynchronize\n", m);
2371 break;
2372 case USING:
2373 fprintf(stderr, "%s restoring %s\n", m, curfile.name);
2374 break;
2375 case SKIP:
2376 fprintf(stderr, "%s skipping over inode %lu\n", m,
2377 (unsigned long)curfile.ino);
2378 break;
2379 }
2380 }
2381 #endif /* HAVE_ZLIB || HAVE_BZLIB || HAVE_LZO */
2382
2383 /*
2384 * Read the first block and get the blocksize from it. Test
2385 * for a compressed dump tape/file. setup() will make the final
2386 * determination by checking the compressed flag if gethead()
2387 * finds a valid header. The test here is necessary to offset the buffer
2388 * by the size of the compressed prefix. zflag is set here so that
2389 * readtape_set can set the correct function pointer for readtape().
2390 * Note that the first block of each tape/file is not compressed
2391 * and does not have a prefix.
2392 */
2393 static void
2394 findtapeblksize(void)
2395 {
2396 long i;
2397 size_t len;
2398 struct tapebuf *tpb = (struct tapebuf *) tapebuf;
2399 struct s_spcl spclpt;
2400
2401 for (i = 0; i < ntrec; i++)
2402 ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
2403 blkcnt = 0;
2404 tbufptr = tapebuf;
2405 /*
2406 * For a pipe or file, read in the first record. For a tape, read
2407 * the first block.
2408 */
2409 len = magtapein ? ntrec * TP_BSIZE : TP_BSIZE;
2410
2411 if (read_a_block(mt, tapebuf, len, &i) <= 0)
2412 errx(1, "Tape read error on first record");
2413
2414 memcpy(&spclpt, tapebuf, TP_BSIZE);
2415 if (converthead(&spclpt) == FAIL) {
2416 cvtflag++;
2417 if (converthead(&spclpt) == FAIL) {
2418 /* Special case for old compressed tapes with prefix */
2419 if (magtapein && (i % TP_BSIZE != 0))
2420 goto oldformat;
2421 errx(1, "Tape is not a dump tape");
2422 }
2423 fprintf(stderr, "Converting to new file system format.\n");
2424 }
2425 /*
2426 * If the input is from a file or a pipe, we read TP_BSIZE
2427 * bytes looking for a dump header. If the dump is compressed
2428 * we need to read in the rest of the block, as determined
2429 * by c_ntrec in the dump header. The first block of the
2430 * dump is not compressed and does not have a prefix.
2431 */
2432 if (!magtapein) {
2433 if (spclpt.c_type == TS_TAPE
2434 && spclpt.c_flags & DR_COMPRESSED) {
2435 /* It's a compressed dump file, read in the */
2436 /* rest of the block based on spclpt.c_ntrec. */
2437 if (spclpt.c_ntrec > ntrec)
2438 errx(1, "Tape blocksize is too large, use "
2439 "\'-b %d\' ", spclpt.c_ntrec);
2440 ntrec = spclpt.c_ntrec;
2441 len = (ntrec - 1) * TP_BSIZE;
2442 zflag = 1;
2443 }
2444 else {
2445 /* read in the rest of the block based on bufsize */
2446 len = bufsize - TP_BSIZE;
2447 }
2448 if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) < 0
2449 || (i != (long)len && i % TP_BSIZE != 0))
2450 errx(1,"Error reading dump file header");
2451 tbufptr = tapebuf;
2452 numtrec = ntrec;
2453 Vprintf(stdout, "Input block size is %ld\n", ntrec);
2454 return;
2455 } /* if (!magtapein) */
2456
2457 /*
2458 * If the input is a tape, we tried to read ntrec * TP_BSIZE bytes.
2459 * If the value of ntrec is too large, we read less than
2460 * what we asked for; adjust the value of ntrec and test for
2461 * a compressed dump tape.
2462 */
2463 if (i % TP_BSIZE != 0) {
2464 oldformat:
2465 /* may be old format compressed dump tape with a prefix */
2466 memcpy(&spclpt, tpb->buf, TP_BSIZE);
2467 cvtflag = 0;
2468 if (converthead(&spclpt) == FAIL) {
2469 cvtflag++;
2470 if (converthead(&spclpt) == FAIL)
2471 errx(1, "Tape is not a dump tape");
2472 fprintf(stderr, "Converting to new file system format.\n");
2473 }
2474 if (i % TP_BSIZE == PREFIXSIZE
2475 && tpb->compressed == 0
2476 && spclpt.c_type == TS_TAPE
2477 && spclpt.c_flags & DR_COMPRESSED) {
2478 zflag = 1;
2479 tbufptr = tpb->buf;
2480 if (tpb->length > bufsize)
2481 errx(1, "Tape blocksize is too large, use "
2482 "\'-b %d\' ", tpb->length / TP_BSIZE);
2483 }
2484 else
2485 errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)",
2486 i, TP_BSIZE);
2487 }
2488 ntrec = i / TP_BSIZE;
2489 if (spclpt.c_type == TS_TAPE) {
2490 if (spclpt.c_flags & DR_COMPRESSED)
2491 zflag = 1;
2492 if (spclpt.c_ntrec > ntrec)
2493 errx(1, "Tape blocksize is too large, use "
2494 "\'-b %d\' ", spclpt.c_ntrec);
2495 }
2496 numtrec = ntrec;
2497 Vprintf(stdout, "Tape block size is %ld\n", ntrec);
2498 }
2499
2500 /*
2501 * Read a block of data handling all of the messy details.
2502 */
2503 static int read_a_block(int fd, char *buf, size_t len, long *lengthread)
2504 {
2505 long i = 1, size;
2506
2507 size = len;
2508 while (size > 0) {
2509 #ifdef RRESTORE
2510 if (!Afile && host)
2511 i = rmtread(buf, size);
2512 else
2513 #endif
2514 i = read(fd, buf, size);
2515
2516 if (i <= 0)
2517 break; /* EOD or error */
2518 size -= i;
2519 if (magtapein)
2520 break; /* block at a time for mt */
2521 buf += i;
2522 }
2523 *lengthread = len - size;
2524 return i;
2525 }
2526
2527 void
2528 closemt(void)
2529 {
2530
2531 if (mt < 0)
2532 return;
2533 #ifdef RRESTORE
2534 if (!Afile && host)
2535 rmtclose();
2536 else
2537 #endif
2538 (void) close(mt);
2539 }
2540
2541 static void
2542 setmagtapein(void) {
2543 struct mtget mt_stat;
2544 static int done = 0;
2545 if (done)
2546 return;
2547 done = 1;
2548 if (!pipein) {
2549 /* need to know if input is really from a tape */
2550 #ifdef RRESTORE
2551 if (host)
2552 magtapein = !lflag;
2553 else
2554 #endif
2555 magtapein = ioctl(mt, MTIOCGET, (char *)&mt_stat) == 0;
2556 }
2557
2558 Vprintf(stdout,"Input is from a %s %s\n",
2559 host ? "remote" : "local",
2560 magtapein ? "tape" :
2561 Vflag ? "multi-volume (no tape)" : "file/pipe");
2562 }
2563
2564 /*
2565 * Read the next block from the tape.
2566 * Check to see if it is one of several vintage headers.
2567 * If it is an old style header, convert it to a new style header.
2568 * If it is not any valid header, return an error.
2569 */
2570 static int
2571 gethead(struct s_spcl *buf)
2572 {
2573 readtape((char *)buf);
2574 return converthead(buf);
2575 }
2576
2577 static int
2578 converthead(struct s_spcl *buf)
2579 {
2580 int32_t i;
2581 union {
2582 quad_t qval;
2583 int32_t val[2];
2584 } qcvt;
2585 union u_ospcl {
2586 char dummy[TP_BSIZE];
2587 struct s_ospcl {
2588 int32_t c_type;
2589 int32_t c_date;
2590 int32_t c_ddate;
2591 int32_t c_volume;
2592 int32_t c_tapea;
2593 u_int16_t c_inumber;
2594 int32_t c_magic;
2595 int32_t c_checksum;
2596 struct odinode {
2597 u_int16_t odi_mode;
2598 u_int16_t odi_nlink;
2599 u_int16_t odi_uid;
2600 u_int16_t odi_gid;
2601 int32_t odi_size;
2602 int32_t odi_rdev;
2603 char odi_addr[36];
2604 int32_t odi_atime;
2605 int32_t odi_mtime;
2606 int32_t odi_ctime;
2607 } c_dinode;
2608 int32_t c_count;
2609 char c_fill[256];
2610 } s_ospcl;
2611 } u_ospcl;
2612
2613 if (!cvtflag) {
2614 if (buf->c_magic != NFS_MAGIC) {
2615 if (swabi(buf->c_magic) != NFS_MAGIC)
2616 return (FAIL);
2617 if (!Bcvt) {
2618 Vprintf(stdout, "Note: Doing Byte swapping\n");
2619 Bcvt = 1;
2620 }
2621 }
2622 if (checksum((int *)buf) == FAIL)
2623 return (FAIL);
2624 if (Bcvt)
2625 swabst((u_char *)"8i4s31i528bi192b3i", (u_char *)buf);
2626 goto good;
2627 }
2628 memcpy(&u_ospcl.s_ospcl, buf, TP_BSIZE);
2629 if (checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
2630 return(FAIL);
2631 if (u_ospcl.s_ospcl.c_magic == OFS_MAGIC) {
2632 memset((char *)buf, 0, (long)TP_BSIZE);
2633 buf->c_type = u_ospcl.s_ospcl.c_type;
2634 buf->c_date = u_ospcl.s_ospcl.c_date;
2635 buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
2636 buf->c_volume = u_ospcl.s_ospcl.c_volume;
2637 buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
2638 buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
2639 buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
2640 buf->c_magic = u_ospcl.s_ospcl.c_magic;
2641 buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
2642 buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
2643 buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
2644 buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
2645 buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
2646 buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
2647 #if defined(__linux__) || defined(sunos)
2648 buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime;
2649 buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2650 buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2651 #else /* __linux__ || sunos */
2652 buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
2653 buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
2654 buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
2655 #endif /* __linux__ || sunos */
2656 buf->c_count = u_ospcl.s_ospcl.c_count;
2657 memmove(buf->c_addr, u_ospcl.s_ospcl.c_fill, (long)256);
2658 }
2659 else if (u_ospcl.s_ospcl.c_magic == FS_UFS2_MAGIC) {
2660 buf->c_date = (int32_t)(*(int64_t *)&u_ospcl.dummy[896]);
2661 buf->c_ddate = (int32_t)(*(int64_t *)&u_ospcl.dummy[904]);
2662 buf->c_tapea = (int32_t)(*(int64_t *)&u_ospcl.dummy[912]);
2663 buf->c_firstrec = (int32_t)(*(int64_t *)&u_ospcl.dummy[920]);
2664 buf->c_ntrec = 0;
2665 buf->c_extattributes = 0;
2666 buf->c_flags |= DR_NEWINODEFMT;
2667 ufs2flag = 1;
2668 }
2669 else
2670 return(FAIL);
2671 buf->c_magic = NFS_MAGIC;
2672
2673 good:
2674 if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
2675 (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
2676 qcvt.qval = buf->c_dinode.di_size;
2677 if (qcvt.val[0] || qcvt.val[1]) {
2678 Vprintf(stdout, "Note: Doing Quad swapping\n");
2679 Qcvt = 1;
2680 }
2681 }
2682 if (Qcvt) {
2683 qcvt.qval = buf->c_dinode.di_size;
2684 i = qcvt.val[1];
2685 qcvt.val[1] = qcvt.val[0];
2686 qcvt.val[0] = i;
2687 buf->c_dinode.di_size = qcvt.qval;
2688 }
2689 readmapflag = 0;
2690
2691 switch (buf->c_type) {
2692
2693 case TS_CLRI:
2694 case TS_BITS:
2695 /*
2696 * Have to patch up missing information in bit map headers
2697 */
2698 buf->c_inumber = 0;
2699 buf->c_dinode.di_size = buf->c_count * TP_BSIZE;
2700 if (buf->c_count > TP_NINDIR)
2701 readmapflag = 1;
2702 else
2703 for (i = 0; i < buf->c_count; i++)
2704 buf->c_addr[i]++;
2705 break;
2706
2707 case TS_TAPE:
2708 if ((buf->c_flags & DR_NEWINODEFMT) == 0)
2709 oldinofmt = 1;
2710 /* fall through */
2711 case TS_END:
2712 buf->c_inumber = 0;
2713 if (buf->c_flags & DR_INODEINFO) {
2714 memcpy(volinfo, buf->c_inos, TP_NINOS * sizeof(dump_ino_t));
2715 if (Bcvt)
2716 swabst((u_char *)"128i", (u_char *)volinfo);
2717 }
2718 break;
2719
2720 case TS_INODE:
2721 case TS_ADDR:
2722 break;
2723
2724 default:
2725 panic("gethead: unknown inode type %d\n", buf->c_type);
2726 break;
2727 }
2728 /*
2729 * If we are restoring a filesystem with old format inodes,
2730 * copy the uid/gid to the new location.
2731 */
2732 if (oldinofmt) {
2733 buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
2734 buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
2735 }
2736 if (dflag)
2737 accthdr(buf);
2738 return(GOOD);
2739 }
2740
2741 static void
2742 converttapebuf(struct tapebuf *tpb)
2743 {
2744 if (Bcvt) {
2745 struct tb {
2746 unsigned int length:28;
2747 unsigned int flags:3;
2748 unsigned int compressed:1;
2749 } tb;
2750 swabst((u_char *)"i", (u_char *)tpb);
2751 memcpy(&tb, tpb, 4);
2752 tpb->length = tb.length;
2753 tpb->flags = tb.flags;
2754 tpb->compressed = tb.compressed;
2755 }
2756 }
2757
2758 /*
2759 * Check that a header is where it belongs and predict the next header
2760 */
2761 static void
2762 accthdr(struct s_spcl *header)
2763 {
2764 static dump_ino_t previno = 0x7fffffff;
2765 static int prevtype;
2766 static long predict;
2767 long blks, i;
2768
2769 if (header->c_type == TS_TAPE) {
2770 fprintf(stderr, "Volume header (%s inode format) ",
2771 oldinofmt ? "old" : "new");
2772 if (header->c_firstrec)
2773 fprintf(stderr, "begins with record %d",
2774 header->c_firstrec);
2775 fprintf(stderr, "\n");
2776 previno = 0x7fffffff;
2777 return;
2778 }
2779 if (previno == 0x7fffffff)
2780 goto newcalc;
2781 switch (prevtype) {
2782 case TS_BITS:
2783 fprintf(stderr, "Dumped inodes map header");
2784 break;
2785 case TS_CLRI:
2786 fprintf(stderr, "Used inodes map header");
2787 break;
2788 case TS_INODE:
2789 fprintf(stderr, "File header, ino %lu", (unsigned long)previno);
2790 break;
2791 case TS_ADDR:
2792 fprintf(stderr, "File continuation header, ino %ld", (long)previno);
2793 break;
2794 case TS_END:
2795 fprintf(stderr, "End of tape header");
2796 break;
2797 }
2798 if (predict != blksread - 1)
2799 fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
2800 predict, blksread - 1);
2801 fprintf(stderr, "\n");
2802 newcalc:
2803 blks = 0;
2804 if (header->c_type != TS_END)
2805 for (i = 0; i < header->c_count; i++)
2806 if (readmapflag || header->c_addr[i] != 0)
2807 blks++;
2808 predict = blks;
2809 blksread = 0;
2810 prevtype = header->c_type;
2811 previno = header->c_inumber;
2812 }
2813
2814 /*
2815 * Find an inode header.
2816 * Complain if had to skip, and complain is set.
2817 */
2818 static void
2819 findinode(struct s_spcl *header)
2820 {
2821 static long skipcnt = 0;
2822 long i;
2823 char buf[TP_BSIZE];
2824
2825 curfile.name = "<name unknown>";
2826 curfile.action = UNKNOWN;
2827 curfile.dip = NULL;
2828 curfile.ino = 0;
2829 do {
2830 if (header->c_magic != NFS_MAGIC) {
2831 skipcnt++;
2832 while (gethead(header) == FAIL ||
2833 header->c_date != dumpdate)
2834 skipcnt++;
2835 }
2836 switch (header->c_type) {
2837
2838 case TS_ADDR:
2839 /*
2840 * Skip up to the beginning of the next record
2841 */
2842 for (i = 0; i < header->c_count; i++)
2843 if (header->c_addr[i])
2844 readtape(buf);
2845 while (gethead(header) == FAIL ||
2846 header->c_date != dumpdate)
2847 skipcnt++;
2848 break;
2849
2850 case TS_INODE:
2851 curfile.dip = &header->c_dinode;
2852 curfile.ino = header->c_inumber;
2853 break;
2854
2855 case TS_END:
2856 curfile.ino = maxino;
2857 break;
2858
2859 case TS_CLRI:
2860 curfile.name = "<file removal list>";
2861 break;
2862
2863 case TS_BITS:
2864 curfile.name = "<file dump list>";
2865 break;
2866
2867 case TS_TAPE:
2868 panic("unexpected tape header\n");
2869 /* NOTREACHED */
2870
2871 default:
2872 panic("unknown tape header type %d\n", spcl.c_type);
2873 /* NOTREACHED */
2874
2875 }
2876 } while (header->c_type == TS_ADDR);
2877 if (skipcnt > 0)
2878 #ifdef USE_QFA
2879 if (!noresyncmesg)
2880 #endif
2881 fprintf(stderr, "resync restore, skipped %ld blocks\n",
2882 skipcnt);
2883 skipcnt = 0;
2884 }
2885
2886 static int
2887 checksum(int *buf)
2888 {
2889 int i, j;
2890
2891 j = sizeof(union u_spcl) / sizeof(int);
2892 i = 0;
2893 if(!Bcvt) {
2894 do
2895 i += *buf++;
2896 while (--j);
2897 } else {
2898 /* What happens if we want to read restore tapes
2899 for a 16bit int machine??? */
2900 do
2901 i += swabi(*buf++);
2902 while (--j);
2903 }
2904
2905 if (i != CHECKSUM) {
2906 fprintf(stderr, "Checksum error %o, inode %lu file %s\n", i,
2907 (unsigned long)curfile.ino, curfile.name);
2908 return(FAIL);
2909 }
2910 return(GOOD);
2911 }
2912
2913 #ifdef RRESTORE
2914 #ifdef __STDC__
2915 #include <stdarg.h>
2916 #else
2917 #include <varargs.h>
2918 #endif
2919
2920 void
2921 #ifdef __STDC__
2922 msg(const char *fmt, ...)
2923 #else
2924 msg(fmt, va_alist)
2925 char *fmt;
2926 va_dcl
2927 #endif
2928 {
2929 va_list ap;
2930 #ifdef __STDC__
2931 va_start(ap, fmt);
2932 #else
2933 va_start(ap);
2934 #endif
2935 (void)vfprintf(stderr, fmt, ap);
2936 va_end(ap);
2937 }
2938 #endif /* RRESTORE */
2939
2940 static u_char *
2941 swab16(u_char *sp, int n)
2942 {
2943 char c;
2944
2945 while (--n >= 0) {
2946 c = sp[0]; sp[0] = sp[1]; sp[1] = c;
2947 sp += 2;
2948 }
2949 return (sp);
2950 }
2951
2952 static u_char *
2953 swab32(u_char *sp, int n)
2954 {
2955 char c;
2956
2957 while (--n >= 0) {
2958 c = sp[0]; sp[0] = sp[3]; sp[3] = c;
2959 c = sp[1]; sp[1] = sp[2]; sp[2] = c;
2960 sp += 4;
2961 }
2962 return (sp);
2963 }
2964
2965 static u_char *
2966 swab64(u_char *sp, int n)
2967 {
2968 char c;
2969
2970 while (--n >= 0) {
2971 c = sp[0]; sp[0] = sp[7]; sp[7] = c;
2972 c = sp[1]; sp[1] = sp[6]; sp[6] = c;
2973 c = sp[2]; sp[2] = sp[5]; sp[5] = c;
2974 c = sp[3]; sp[3] = sp[4]; sp[4] = c;
2975 sp += 8;
2976 }
2977 return (sp);
2978 }
2979
2980 void
2981 swabst(u_char *cp, u_char *sp)
2982 {
2983 int n = 0;
2984
2985 while (*cp) {
2986 switch (*cp) {
2987 case '0': case '1': case '2': case '3': case '4':
2988 case '5': case '6': case '7': case '8': case '9':
2989 n = (n * 10) + (*cp++ - '0');
2990 continue;
2991
2992 case 's': case 'w': case 'h':
2993 if (n == 0)
2994 n = 1;
2995 sp = swab16(sp, n);
2996 break;
2997
2998 case 'i':
2999 if (n == 0)
3000 n = 1;
3001 sp = swab32(sp, n);
3002 break;
3003
3004 case 'l':
3005 if (n == 0)
3006 n = 1;
3007 sp = swab64(sp, n);
3008 break;
3009
3010 default: /* Any other character, like 'b' counts as byte. */
3011 if (n == 0)
3012 n = 1;
3013 sp += n;
3014 break;
3015 }
3016 cp++;
3017 n = 0;
3018 }
3019 }
3020
3021 static u_int
3022 swabi(u_int x)
3023 {
3024 swabst((u_char *)"i", (u_char *)&x);
3025 return (x);
3026 }
3027
3028 #if 0
3029 static u_long
3030 swabl(u_long x)
3031 {
3032 swabst((u_char *)"l", (u_char *)&x);
3033 return (x);
3034 }
3035 #endif
3036
3037 void
3038 RequestVol(long tnum)
3039 {
3040 FLUSHTAPEBUF();
3041 getvol(tnum);
3042 }
3043
3044 #ifdef USE_QFA
3045 #ifdef sunos
3046 extern int fdsmtc;
3047
3048 struct uscsi_cmd {
3049 int uscsi_flags; /* read, write, etc. see below */
3050 short uscsi_status; /* resulting status */
3051 short uscsi_timeout; /* Command Timeout */
3052 caddr_t uscsi_cdb; /* cdb to send to target */
3053 caddr_t uscsi_bufaddr; /* i/o source/destination */
3054 u_int uscsi_buflen; /* size of i/o to take place */
3055 u_int uscsi_resid; /* resid from i/o operation */
3056 u_char uscsi_cdblen; /* # of valid cdb bytes */
3057 u_char uscsi_rqlen; /* size of uscsi_rqbuf */
3058 u_char uscsi_rqstatus; /* status of request sense cmd */
3059 u_char uscsi_rqresid; /* resid of request sense cmd */
3060 caddr_t uscsi_rqbuf; /* request sense buffer */
3061 void *uscsi_reserved_5; /* Reserved for Future Use */
3062 };
3063
3064 #define CDB_GROUP0 6 /* 6-byte cdb's */
3065 #define CDB_GROUP1 10 /* 10-byte cdb's */
3066 #define CDB_GROUP2 10 /* 10-byte cdb's */
3067 #define CDB_GROUP3 0 /* reserved */
3068 #define CDB_GROUP4 16 /* 16-byte cdb's */
3069 #define CDB_GROUP5 12 /* 12-byte cdb's */
3070 #define CDB_GROUP6 0 /* reserved */
3071 #define CDB_GROUP7 0 /* reserved */
3072
3073 #define USCSI_WRITE 0x00000 /* send data to device */
3074 #define USCSI_SILENT 0x00001 /* no error messages */
3075 #define USCSI_DIAGNOSE 0x00002 /* fail if any error occurs */
3076 #define USCSI_ISOLATE 0x00004 /* isolate from normal commands */
3077 #define USCSI_READ 0x00008 /* get data from device */
3078 #define USCSI_RESET 0x04000 /* Reset target */
3079 #define USCSI_RESET_ALL 0x08000 /* Reset all targets */
3080 #define USCSI_RQENABLE 0x10000 /* Enable Request Sense extensions */
3081
3082 #define USCSIIOC (0x04 << 8)
3083 #define USCSICMD (USCSIIOC|201) /* user scsi command */
3084
3085 #define USCSI_TIMEOUT 30
3086 #define USCSI_SHORT_TIMEOUT 900
3087 #define USCSI_LONG_TIMEOUT 14000
3088
3089 #define B(s,i) ((unsigned char)((s) >> i))
3090 #define B1(s) ((unsigned char)(s))
3091
3092 #define MSB4(s,v) *(s)=B(v,24),(s)[1]=B(v,16), (s)[2]=B(v,8), (s)[3]=B1(v)
3093
3094
3095 int
3096 GetTapePos(long long *pos)
3097 {
3098 int err = 0;
3099 struct uscsi_cmd scmd;
3100 char buf[512];
3101 char parm[512 * 8];
3102 long lpos;
3103
3104 (void)memset((void *)buf, 0, sizeof(buf));
3105 (void)memset((void *)&scmd, 0, sizeof(scmd));
3106 scmd.uscsi_flags = USCSI_READ|USCSI_SILENT;
3107 scmd.uscsi_timeout = USCSI_TIMEOUT;
3108 scmd.uscsi_cdb = buf;
3109 scmd.uscsi_cdblen = CDB_GROUP1;
3110 buf[0] = 0x34; /* read position */
3111 buf[1] = 0;
3112 (void)memset((void *)parm, 0, 512);
3113 scmd.uscsi_bufaddr = parm;
3114 scmd.uscsi_buflen = 56;
3115 if (ioctl(fdsmtc, USCSICMD, &scmd) == -1) {
3116 err = errno;
3117 return err;
3118 }
3119 (void)memcpy(&lpos, &parm[4], sizeof(long));
3120 *pos = lpos;
3121 return err;
3122 }
3123
3124 int
3125 GotoTapePos(long long pos)
3126 {
3127 int err = 0;
3128 struct uscsi_cmd scmd;
3129 char buf[512];
3130 char parm[512 * 8];
3131 long lpos = (long)pos;
3132
3133 (void)memset((void *)buf, 0, sizeof(buf));
3134 (void)memset((void *)&scmd, 0, sizeof(scmd));
3135 scmd.uscsi_flags = USCSI_WRITE|USCSI_SILENT;
3136 scmd.uscsi_timeout = 360; /* 5 Minutes */
3137 scmd.uscsi_cdb = buf;
3138 scmd.uscsi_cdblen = CDB_GROUP1;
3139 buf[0] = 0x2b; /* locate */
3140 buf[1] = 0;
3141 MSB4(&buf[3], lpos);
3142 (void)memset((void *)parm, 0, 512);
3143 scmd.uscsi_bufaddr = NULL;
3144 scmd.uscsi_buflen = 0;
3145 if (ioctl(fdsmtc, USCSICMD, &scmd) == -1) {
3146 err = errno;
3147 return err;
3148 }
3149 return err;
3150 }
3151 #endif
3152
3153 #define LSEEK_GET_TAPEPOS 10
3154 #define LSEEK_GO2_TAPEPOS 11
3155
3156 #ifdef __linux__
3157 typedef struct mt_pos {
3158 short mt_op;
3159 int mt_count;
3160 } MTPosRec, *MTPosPtr;
3161
3162
3163 /*
3164 * get the current position of the tape
3165 */
3166 int
3167 GetTapePos(long long *pos)
3168 {
3169 int err = 0;
3170
3171 #ifdef RDUMP
3172 if (host) {
3173 *pos = (long long) rmtseek((OFF_T)0, (int)LSEEK_GET_TAPEPOS);
3174 err = *pos < 0;
3175 }
3176 else
3177 #endif
3178 {
3179 if (magtapein) {
3180 long mtpos;
3181 *pos = 0;
3182 err = (ioctl(mt, MTIOCPOS, &mtpos) < 0);
3183 *pos = (long long)mtpos;
3184 }
3185 else {
3186 *pos = LSEEK(mt, 0, SEEK_CUR);
3187 err = (*pos < 0);
3188 }
3189 }
3190 if (err) {
3191 err = errno;
3192 fprintf(stdout, "[%ld] error: %d (getting tapepos: %lld)\n",
3193 (unsigned long)getpid(), err, *pos);
3194 return err;
3195 }
3196 return err;
3197 }
3198
3199 /*
3200 * go to specified position on tape
3201 */
3202 int
3203 GotoTapePos(long long pos)
3204 {
3205 int err = 0;
3206
3207 #ifdef RDUMP
3208 if (host)
3209 err = (rmtseek((OFF_T)pos, (int)LSEEK_GO2_TAPEPOS) < 0);
3210 else
3211 #endif
3212 {
3213 if (magtapein) {
3214 struct mt_pos buf;
3215 buf.mt_op = MTSEEK;
3216 buf.mt_count = (int) pos;
3217 err = (ioctl(mt, MTIOCTOP, &buf) < 0);
3218 }
3219 else {
3220 pos = LSEEK(mt, pos, SEEK_SET);
3221 err = (pos < 0);
3222 }
3223 }
3224 if (err) {
3225 err = errno;
3226 fprintf(stdout, "[%ld] error: %d (setting tapepos: %lld)\n",
3227 (unsigned long)getpid(), err, pos);
3228 return err;
3229 }
3230 return err;
3231 }
3232 #endif /* __linux__ */
3233
3234 /*
3235 * read next data from tape to re-sync
3236 */
3237 void
3238 ReReadFromTape(void)
3239 {
3240 FLUSHTAPEBUF();
3241 noresyncmesg = 1;
3242 if (gethead(&spcl) == FAIL) {
3243 #ifdef DEBUG_QFA
3244 fprintf(stdout, "DEBUG 1 gethead failed\n");
3245 #endif
3246 }
3247 findinode(&spcl);
3248 noresyncmesg = 0;
3249 }
3250
3251 void
3252 ReReadInodeFromTape(dump_ino_t theino)
3253 {
3254 long cntloop = 0;
3255
3256 FLUSHTAPEBUF();
3257 noresyncmesg = 1;
3258 do {
3259 cntloop++;
3260 gethead(&spcl);
3261 } while (!(spcl.c_inumber == theino && spcl.c_type == TS_INODE && spcl.c_date == dumpdate));
3262 #ifdef DEBUG_QFA
3263 fprintf(stderr, "DEBUG: %ld reads\n", cntloop);
3264 fprintf(stderr, "DEBUG: bufsize %ld\n", bufsize);
3265 fprintf(stderr, "DEBUG: ntrec %ld\n", ntrec);
3266 fprintf(stderr, "DEBUG: %ld reads\n", cntloop);
3267 #endif
3268 findinode(&spcl);
3269 noresyncmesg = 0;
3270 }
3271
3272 #ifdef sunos
3273 int
3274 OpenSMTCmt(char *themagtape)
3275 {
3276 if (GetSCSIIDFromPath(themagtape, &scsiid)) {
3277 fprintf(stderr, "can't get SCSI-ID for %s\n", themagtape);
3278 return -1;
3279 }
3280 if (scsiid < 0) {
3281 fprintf(stderr, "can't get SCSI-ID for %s\n", themagtape);
3282 return -1;
3283 }
3284 sprintf(smtcpath, "/dev/rsmtc%ld,0", scsiid);
3285 if ((fdsmtc = open(smtcpath, O_RDWR)) == -1) {
3286 fprintf(stderr, "can't open smtc device: %s, %d\n", smtcpath, errno);
3287 return -1;
3288 }
3289 return 0;
3290 }
3291 #endif /* sunos */
3292 #endif /* USE_QFA */
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