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Commit | Line | Data |
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1227625a SP |
1 | /* |
2 | * Ported to Linux's Second Extended File System as part of the | |
3 | * dump and restore backup suit | |
b45f51d6 SP |
4 | * Remy Card <card@Linux.EU.Org>, 1994-1997 |
5 | * Stelian Pop <pop@cybercable.fr>, 1999 | |
1227625a SP |
6 | * |
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. All advertising materials mentioning features or use of this software | |
27 | * must display the following acknowledgement: | |
28 | * This product includes software developed by the University of | |
29 | * California, Berkeley and its contributors. | |
30 | * 4. Neither the name of the University nor the names of its contributors | |
31 | * may be used to endorse or promote products derived from this software | |
32 | * without specific prior written permission. | |
33 | * | |
34 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
35 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
36 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
37 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
38 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
39 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
40 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
41 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
42 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
43 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
44 | * SUCH DAMAGE. | |
45 | */ | |
46 | ||
47 | #ifndef lint | |
b45f51d6 | 48 | #if 0 |
1227625a | 49 | static char sccsid[] = "@(#)tape.c 8.9 (Berkeley) 5/1/95"; |
b45f51d6 SP |
50 | #endif |
51 | static const char rcsid[] = | |
52 | "$Id: tape.c,v 1.2 1999/10/11 12:53:24 stelian Exp $"; | |
1227625a SP |
53 | #endif /* not lint */ |
54 | ||
55 | #include <sys/param.h> | |
56 | #include <sys/file.h> | |
1227625a SP |
57 | #include <sys/mtio.h> |
58 | #include <sys/stat.h> | |
59 | ||
60 | #ifdef __linux__ | |
61 | #include <sys/time.h> | |
62 | #include <linux/ext2_fs.h> | |
63 | #include <bsdcompat.h> | |
64 | #else /* __linux__ */ | |
65 | #include <ufs/ufs/dinode.h> | |
66 | #endif /* __linux__ */ | |
67 | #include <protocols/dumprestore.h> | |
68 | ||
69 | #include <errno.h> | |
70 | #include <setjmp.h> | |
71 | #include <stdio.h> | |
72 | #include <stdlib.h> | |
73 | #include <string.h> | |
74 | #include <unistd.h> | |
75 | ||
76 | #ifdef __linux__ | |
77 | #include <ext2fs/ext2fs.h> | |
78 | #endif | |
79 | ||
80 | #include "restore.h" | |
81 | #include "extern.h" | |
82 | #include "pathnames.h" | |
83 | ||
84 | static long fssize = MAXBSIZE; | |
85 | static int mt = -1; | |
86 | static int pipein = 0; | |
b45f51d6 | 87 | static char *magtape; |
1227625a SP |
88 | static int blkcnt; |
89 | static int numtrec; | |
90 | static char *tapebuf; | |
91 | static union u_spcl endoftapemark; | |
92 | static long blksread; /* blocks read since last header */ | |
93 | static long tpblksread = 0; /* TP_BSIZE blocks read */ | |
94 | static long tapesread; | |
95 | static jmp_buf restart; | |
96 | static int gettingfile = 0; /* restart has a valid frame */ | |
97 | static char *host = NULL; | |
98 | ||
99 | static int ofile; | |
100 | static char *map; | |
101 | static char lnkbuf[MAXPATHLEN + 1]; | |
102 | static int pathlen; | |
103 | ||
104 | int oldinofmt; /* old inode format conversion required */ | |
105 | int Bcvt; /* Swap Bytes (for CCI or sun) */ | |
106 | static int Qcvt; /* Swap quads (for sun) */ | |
107 | ||
108 | #define FLUSHTAPEBUF() blkcnt = ntrec + 1 | |
109 | ||
110 | static void accthdr __P((struct s_spcl *)); | |
111 | static int checksum __P((int *)); | |
112 | static void findinode __P((struct s_spcl *)); | |
113 | static void findtapeblksize __P((void)); | |
114 | static int gethead __P((struct s_spcl *)); | |
115 | static void readtape __P((char *)); | |
116 | static void setdumpnum __P((void)); | |
117 | static u_long swabl __P((u_long)); | |
118 | static u_char *swablong __P((u_char *, int)); | |
119 | static u_char *swabshort __P((u_char *, int)); | |
120 | static void terminateinput __P((void)); | |
121 | static void xtrfile __P((char *, long)); | |
122 | static void xtrlnkfile __P((char *, long)); | |
123 | static void xtrlnkskip __P((char *, long)); | |
124 | static void xtrmap __P((char *, long)); | |
125 | static void xtrmapskip __P((char *, long)); | |
126 | static void xtrskip __P((char *, long)); | |
127 | ||
b45f51d6 SP |
128 | static int readmapflag; |
129 | ||
1227625a SP |
130 | /* |
131 | * Set up an input source | |
132 | */ | |
133 | void | |
134 | setinput(source) | |
135 | char *source; | |
136 | { | |
137 | FLUSHTAPEBUF(); | |
138 | if (bflag) | |
139 | newtapebuf(ntrec); | |
140 | else | |
141 | newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC); | |
142 | terminal = stdin; | |
143 | ||
144 | #ifdef RRESTORE | |
145 | if (strchr(source, ':')) { | |
146 | host = source; | |
147 | source = strchr(host, ':'); | |
148 | *source++ = '\0'; | |
149 | if (rmthost(host) == 0) | |
150 | done(1); | |
151 | } else | |
152 | #endif | |
153 | if (strcmp(source, "-") == 0) { | |
154 | /* | |
155 | * Since input is coming from a pipe we must establish | |
156 | * our own connection to the terminal. | |
157 | */ | |
158 | terminal = fopen(_PATH_TTY, "r"); | |
159 | if (terminal == NULL) { | |
160 | (void)fprintf(stderr, "cannot open %s: %s\n", | |
161 | _PATH_TTY, strerror(errno)); | |
162 | terminal = fopen(_PATH_DEVNULL, "r"); | |
163 | if (terminal == NULL) { | |
164 | (void)fprintf(stderr, "cannot open %s: %s\n", | |
165 | _PATH_DEVNULL, strerror(errno)); | |
166 | done(1); | |
167 | } | |
168 | } | |
169 | pipein++; | |
170 | } | |
171 | setuid(getuid()); /* no longer need or want root privileges */ | |
b45f51d6 SP |
172 | magtape = strdup(source); |
173 | if (magtape == NULL) { | |
174 | fprintf(stderr, "Cannot allocate space for magtape buffer\n"); | |
175 | done(1); | |
176 | } | |
1227625a SP |
177 | } |
178 | ||
179 | void | |
180 | newtapebuf(size) | |
181 | long size; | |
182 | { | |
183 | static tapebufsize = -1; | |
184 | ||
185 | ntrec = size; | |
186 | if (size <= tapebufsize) | |
187 | return; | |
188 | if (tapebuf != NULL) | |
189 | free(tapebuf); | |
190 | tapebuf = malloc(size * TP_BSIZE); | |
191 | if (tapebuf == NULL) { | |
192 | fprintf(stderr, "Cannot allocate space for tape buffer\n"); | |
193 | done(1); | |
194 | } | |
195 | tapebufsize = size; | |
196 | } | |
197 | ||
198 | /* | |
199 | * Verify that the tape drive can be accessed and | |
200 | * that it actually is a dump tape. | |
201 | */ | |
202 | void | |
203 | setup() | |
204 | { | |
205 | int i, j, *ip; | |
206 | struct stat stbuf; | |
207 | ||
208 | vprintf(stdout, "Verify tape and initialize maps\n"); | |
209 | #ifdef RRESTORE | |
210 | if (host) | |
211 | mt = rmtopen(magtape, 0); | |
212 | else | |
213 | #endif | |
214 | if (pipein) | |
215 | mt = 0; | |
216 | else | |
217 | mt = open(magtape, O_RDONLY, 0); | |
218 | if (mt < 0) { | |
219 | fprintf(stderr, "%s: %s\n", magtape, strerror(errno)); | |
220 | done(1); | |
221 | } | |
222 | volno = 1; | |
223 | setdumpnum(); | |
224 | FLUSHTAPEBUF(); | |
225 | if (!pipein && !bflag) | |
226 | findtapeblksize(); | |
227 | if (gethead(&spcl) == FAIL) { | |
228 | blkcnt--; /* push back this block */ | |
229 | blksread--; | |
230 | tpblksread--; | |
231 | cvtflag++; | |
232 | if (gethead(&spcl) == FAIL) { | |
233 | fprintf(stderr, "Tape is not a dump tape\n"); | |
234 | done(1); | |
235 | } | |
236 | fprintf(stderr, "Converting to new file system format.\n"); | |
237 | } | |
238 | if (pipein) { | |
239 | endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC; | |
240 | endoftapemark.s_spcl.c_type = TS_END; | |
241 | ip = (int *)&endoftapemark; | |
242 | j = sizeof(union u_spcl) / sizeof(int); | |
243 | i = 0; | |
244 | do | |
245 | i += *ip++; | |
246 | while (--j); | |
247 | endoftapemark.s_spcl.c_checksum = CHECKSUM - i; | |
248 | } | |
249 | if (vflag || command == 't' || command == 'C') | |
250 | printdumpinfo(); | |
251 | if (filesys == NULL) { | |
252 | filesys = spcl.c_filesys; | |
253 | } | |
254 | dumptime = spcl.c_ddate; | |
255 | dumpdate = spcl.c_date; | |
256 | if (stat(".", &stbuf) < 0) { | |
257 | fprintf(stderr, "cannot stat .: %s\n", strerror(errno)); | |
258 | done(1); | |
259 | } | |
b45f51d6 SP |
260 | if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE ) |
261 | fssize = TP_BSIZE; | |
262 | if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE) | |
1227625a SP |
263 | fssize = stbuf.st_blksize; |
264 | if (((fssize - 1) & fssize) != 0) { | |
b45f51d6 | 265 | fprintf(stderr, "bad block size %ld\n", fssize); |
1227625a SP |
266 | done(1); |
267 | } | |
268 | if (spcl.c_volume != 1) { | |
269 | fprintf(stderr, "Tape is not volume 1 of the dump\n"); | |
270 | done(1); | |
271 | } | |
272 | if (gethead(&spcl) == FAIL) { | |
b45f51d6 | 273 | dprintf(stdout, "header read failed at %ld blocks\n", blksread); |
1227625a SP |
274 | panic("no header after volume mark!\n"); |
275 | } | |
276 | findinode(&spcl); | |
277 | if (spcl.c_type != TS_CLRI) { | |
278 | fprintf(stderr, "Cannot find file removal list\n"); | |
279 | done(1); | |
280 | } | |
281 | maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1; | |
b45f51d6 | 282 | dprintf(stdout, "maxino = %ld\n", maxino); |
1227625a SP |
283 | map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY)); |
284 | if (map == NULL) | |
285 | panic("no memory for active inode map\n"); | |
286 | usedinomap = map; | |
287 | curfile.action = USING; | |
288 | getfile(xtrmap, xtrmapskip); | |
289 | if (spcl.c_type != TS_BITS) { | |
290 | fprintf(stderr, "Cannot find file dump list\n"); | |
291 | done(1); | |
292 | } | |
293 | map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY)); | |
294 | if (map == (char *)NULL) | |
295 | panic("no memory for file dump list\n"); | |
296 | dumpmap = map; | |
297 | curfile.action = USING; | |
298 | getfile(xtrmap, xtrmapskip); | |
299 | /* | |
300 | * If there may be whiteout entries on the tape, pretend that the | |
301 | * whiteout inode exists, so that the whiteout entries can be | |
302 | * extracted. | |
303 | */ | |
304 | if (oldinofmt == 0) | |
305 | SETINO(WINO, dumpmap); | |
306 | } | |
307 | ||
308 | /* | |
309 | * Prompt user to load a new dump volume. | |
310 | * "Nextvol" is the next suggested volume to use. | |
311 | * This suggested volume is enforced when doing full | |
b45f51d6 | 312 | * or incremental restores, but can be overridden by |
1227625a SP |
313 | * the user when only extracting a subset of the files. |
314 | */ | |
315 | void | |
316 | getvol(nextvol) | |
317 | long nextvol; | |
318 | { | |
b45f51d6 | 319 | long newvol=0, savecnt=0, wantnext=0, i; |
1227625a SP |
320 | union u_spcl tmpspcl; |
321 | # define tmpbuf tmpspcl.s_spcl | |
322 | char buf[TP_BSIZE]; | |
323 | ||
324 | if (nextvol == 1) { | |
325 | tapesread = 0; | |
326 | gettingfile = 0; | |
327 | } | |
328 | if (pipein) { | |
329 | if (nextvol != 1) | |
330 | panic("Changing volumes on pipe input?\n"); | |
331 | if (volno == 1) | |
332 | return; | |
333 | goto gethdr; | |
334 | } | |
335 | savecnt = blksread; | |
336 | again: | |
337 | if (pipein) | |
338 | done(1); /* pipes do not get a second chance */ | |
339 | if (command == 'R' || command == 'r' || curfile.action != SKIP) { | |
340 | newvol = nextvol; | |
341 | wantnext = 1; | |
b45f51d6 | 342 | } else { |
1227625a SP |
343 | newvol = 0; |
344 | wantnext = 0; | |
345 | } | |
346 | while (newvol <= 0) { | |
347 | if (tapesread == 0) { | |
348 | fprintf(stderr, "%s%s%s%s%s", | |
349 | "You have not read any tapes yet.\n", | |
350 | "Unless you know which volume your", | |
351 | " file(s) are on you should start\n", | |
352 | "with the last volume and work", | |
353 | " towards the first.\n"); | |
354 | } else { | |
355 | fprintf(stderr, "You have read volumes"); | |
356 | strcpy(buf, ": "); | |
357 | for (i = 1; i < 32; i++) | |
358 | if (tapesread & (1 << i)) { | |
b45f51d6 | 359 | fprintf(stderr, "%s%ld", buf, i); |
1227625a SP |
360 | strcpy(buf, ", "); |
361 | } | |
362 | fprintf(stderr, "\n"); | |
363 | } | |
364 | do { | |
365 | fprintf(stderr, "Specify next volume #: "); | |
366 | (void) fflush(stderr); | |
367 | (void) fgets(buf, BUFSIZ, terminal); | |
368 | } while (!feof(terminal) && buf[0] == '\n'); | |
369 | if (feof(terminal)) | |
370 | done(1); | |
371 | newvol = atoi(buf); | |
372 | if (newvol <= 0) { | |
373 | fprintf(stderr, | |
374 | "Volume numbers are positive numerics\n"); | |
375 | } | |
376 | } | |
377 | if (newvol == volno) { | |
378 | tapesread |= 1 << volno; | |
379 | return; | |
380 | } | |
381 | closemt(); | |
b45f51d6 | 382 | fprintf(stderr, "Mount tape volume %ld\n", newvol); |
1227625a SP |
383 | fprintf(stderr, "Enter ``none'' if there are no more tapes\n"); |
384 | fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape); | |
385 | (void) fflush(stderr); | |
386 | (void) fgets(buf, BUFSIZ, terminal); | |
387 | if (feof(terminal)) | |
388 | done(1); | |
389 | if (!strcmp(buf, "none\n")) { | |
390 | terminateinput(); | |
391 | return; | |
392 | } | |
393 | if (buf[0] != '\n') { | |
394 | (void) strcpy(magtape, buf); | |
395 | magtape[strlen(magtape) - 1] = '\0'; | |
396 | } | |
397 | #ifdef RRESTORE | |
398 | if (host) | |
399 | mt = rmtopen(magtape, 0); | |
400 | else | |
401 | #endif | |
402 | mt = open(magtape, O_RDONLY, 0); | |
403 | ||
404 | if (mt == -1) { | |
405 | fprintf(stderr, "Cannot open %s\n", magtape); | |
406 | volno = -1; | |
407 | goto again; | |
408 | } | |
409 | gethdr: | |
410 | volno = newvol; | |
411 | setdumpnum(); | |
412 | FLUSHTAPEBUF(); | |
413 | if (gethead(&tmpbuf) == FAIL) { | |
b45f51d6 | 414 | dprintf(stdout, "header read failed at %ld blocks\n", blksread); |
1227625a SP |
415 | fprintf(stderr, "tape is not dump tape\n"); |
416 | volno = 0; | |
417 | goto again; | |
418 | } | |
419 | if (tmpbuf.c_volume != volno) { | |
420 | fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume); | |
421 | volno = 0; | |
422 | goto again; | |
423 | } | |
424 | if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) { | |
425 | #ifdef __linux__ | |
426 | fprintf(stderr, "Wrong dump date\n\tgot: %s", | |
427 | ctime4(&tmpbuf.c_date)); | |
428 | fprintf(stderr, "\twanted: %s", ctime4(&dumpdate)); | |
429 | #else | |
430 | fprintf(stderr, "Wrong dump date\n\tgot: %s", | |
431 | ctime(&tmpbuf.c_date)); | |
432 | fprintf(stderr, "\twanted: %s", ctime(&dumpdate)); | |
433 | #endif | |
434 | volno = 0; | |
435 | goto again; | |
436 | } | |
437 | tapesread |= 1 << volno; | |
438 | blksread = savecnt; | |
439 | /* | |
440 | * If continuing from the previous volume, skip over any | |
441 | * blocks read already at the end of the previous volume. | |
442 | * | |
443 | * If coming to this volume at random, skip to the beginning | |
444 | * of the next record. | |
445 | */ | |
b45f51d6 | 446 | dprintf(stdout, "read %ld recs, tape starts with %d\n", |
1227625a SP |
447 | tpblksread, tmpbuf.c_firstrec); |
448 | if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) { | |
449 | if (!wantnext) { | |
450 | tpblksread = tmpbuf.c_firstrec; | |
451 | for (i = tmpbuf.c_count; i > 0; i--) | |
452 | readtape(buf); | |
453 | } else if (tmpbuf.c_firstrec > 0 && | |
454 | tmpbuf.c_firstrec < tpblksread - 1) { | |
455 | /* | |
456 | * -1 since we've read the volume header | |
457 | */ | |
458 | i = tpblksread - tmpbuf.c_firstrec - 1; | |
b45f51d6 | 459 | dprintf(stderr, "Skipping %ld duplicate record%s.\n", |
1227625a SP |
460 | i, i > 1 ? "s" : ""); |
461 | while (--i >= 0) | |
462 | readtape(buf); | |
463 | } | |
464 | } | |
465 | if (curfile.action == USING) { | |
466 | if (volno == 1) | |
467 | panic("active file into volume 1\n"); | |
468 | return; | |
469 | } | |
470 | /* | |
471 | * Skip up to the beginning of the next record | |
472 | */ | |
473 | if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) | |
474 | for (i = tmpbuf.c_count; i > 0; i--) | |
475 | readtape(buf); | |
476 | (void) gethead(&spcl); | |
477 | findinode(&spcl); | |
478 | if (gettingfile) { | |
479 | gettingfile = 0; | |
480 | longjmp(restart, 1); | |
481 | } | |
482 | } | |
483 | ||
484 | /* | |
485 | * Handle unexpected EOF. | |
486 | */ | |
487 | static void | |
488 | terminateinput() | |
489 | { | |
490 | ||
491 | if (gettingfile && curfile.action == USING) { | |
492 | printf("Warning: %s %s\n", | |
493 | "End-of-input encountered while extracting", curfile.name); | |
494 | } | |
495 | curfile.name = "<name unknown>"; | |
496 | curfile.action = UNKNOWN; | |
497 | curfile.dip = NULL; | |
498 | curfile.ino = maxino; | |
499 | if (gettingfile) { | |
500 | gettingfile = 0; | |
501 | longjmp(restart, 1); | |
502 | } | |
503 | } | |
504 | ||
505 | /* | |
506 | * handle multiple dumps per tape by skipping forward to the | |
507 | * appropriate one. | |
508 | */ | |
509 | static void | |
510 | setdumpnum() | |
511 | { | |
512 | struct mtop tcom; | |
513 | ||
514 | if (dumpnum == 1 || volno != 1) | |
515 | return; | |
516 | if (pipein) { | |
517 | fprintf(stderr, "Cannot have multiple dumps on pipe input\n"); | |
518 | done(1); | |
519 | } | |
520 | tcom.mt_op = MTFSF; | |
521 | tcom.mt_count = dumpnum - 1; | |
522 | #ifdef RRESTORE | |
523 | if (host) | |
524 | rmtioctl(MTFSF, dumpnum - 1); | |
b45f51d6 | 525 | else |
1227625a SP |
526 | #endif |
527 | if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0) | |
528 | fprintf(stderr, "ioctl MTFSF: %s\n", strerror(errno)); | |
529 | } | |
530 | ||
531 | void | |
532 | printdumpinfo() | |
533 | { | |
534 | #ifdef __linux__ | |
535 | fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date)); | |
536 | fprintf(stdout, "Dumped from: %s", | |
537 | (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate)); | |
538 | #else | |
539 | fprintf(stdout, "Dump date: %s", ctime(&spcl.c_date)); | |
540 | fprintf(stdout, "Dumped from: %s", | |
541 | (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&spcl.c_ddate)); | |
542 | #endif | |
543 | if (spcl.c_host[0] == '\0') | |
544 | return; | |
545 | fprintf(stderr, "Level %d dump of %s on %s:%s\n", | |
546 | spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev); | |
547 | fprintf(stderr, "Label: %s\n", spcl.c_label); | |
548 | } | |
549 | ||
550 | int | |
551 | extractfile(name) | |
552 | char *name; | |
553 | { | |
554 | int flags; | |
555 | mode_t mode; | |
556 | struct timeval timep[2]; | |
557 | struct entry *ep; | |
558 | #ifdef __linux__ | |
559 | int err; | |
560 | uid_t uid; | |
561 | gid_t gid; | |
562 | #endif | |
563 | ||
564 | curfile.name = name; | |
565 | curfile.action = USING; | |
566 | #ifdef __linux__ | |
567 | timep[0].tv_sec = curfile.dip->di_atime.tv_sec; | |
568 | timep[0].tv_usec = curfile.dip->di_atime.tv_usec; | |
569 | timep[1].tv_sec = curfile.dip->di_mtime.tv_sec; | |
570 | timep[1].tv_usec = curfile.dip->di_mtime.tv_usec; | |
571 | #else /* __linux__ */ | |
572 | timep[0].tv_sec = curfile.dip->di_atime; | |
573 | timep[0].tv_usec = curfile.dip->di_atimensec / 1000; | |
574 | timep[1].tv_sec = curfile.dip->di_mtime; | |
575 | timep[1].tv_usec = curfile.dip->di_mtimensec / 1000; | |
576 | #endif /* __linux__ */ | |
577 | mode = curfile.dip->di_mode; | |
578 | flags = curfile.dip->di_flags; | |
579 | switch (mode & IFMT) { | |
580 | ||
581 | default: | |
582 | fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode); | |
583 | skipfile(); | |
584 | return (FAIL); | |
585 | ||
586 | case IFSOCK: | |
587 | vprintf(stdout, "skipped socket %s\n", name); | |
588 | skipfile(); | |
589 | return (GOOD); | |
590 | ||
591 | case IFDIR: | |
592 | if (mflag) { | |
593 | ep = lookupname(name); | |
594 | if (ep == NULL || ep->e_flags & EXTRACT) | |
595 | panic("unextracted directory %s\n", name); | |
596 | skipfile(); | |
597 | return (GOOD); | |
598 | } | |
599 | vprintf(stdout, "extract file %s\n", name); | |
600 | return (genliteraldir(name, curfile.ino)); | |
601 | ||
602 | case IFLNK: | |
603 | lnkbuf[0] = '\0'; | |
604 | pathlen = 0; | |
605 | #ifdef __linux__ | |
606 | uid = curfile.dip->di_uid; | |
607 | gid = curfile.dip->di_gid; | |
608 | #endif | |
609 | getfile(xtrlnkfile, xtrlnkskip); | |
610 | if (pathlen == 0) { | |
611 | vprintf(stdout, | |
612 | "%s: zero length symbolic link (ignored)\n", name); | |
613 | return (GOOD); | |
614 | } | |
615 | #ifdef __linux__ | |
616 | err = linkit(lnkbuf, name, SYMLINK); | |
617 | if (err == GOOD) | |
618 | (void) chown(name, uid, gid); | |
619 | return (err); | |
620 | #else | |
621 | return (linkit(lnkbuf, name, SYMLINK)); | |
622 | #endif | |
623 | ||
b45f51d6 SP |
624 | case IFIFO: |
625 | vprintf(stdout, "extract fifo %s\n", name); | |
1227625a SP |
626 | if (Nflag) { |
627 | skipfile(); | |
628 | return (GOOD); | |
629 | } | |
b45f51d6 SP |
630 | if (uflag && !Nflag) |
631 | (void)unlink(name); | |
632 | if (mkfifo(name, mode) < 0) { | |
633 | fprintf(stderr, "%s: cannot create fifo: %s\n", | |
1227625a SP |
634 | name, strerror(errno)); |
635 | skipfile(); | |
636 | return (FAIL); | |
637 | } | |
638 | (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid); | |
639 | (void) chmod(name, mode); | |
b45f51d6 | 640 | #ifdef __linux__ |
1227625a SP |
641 | (void) fsetflags(name, flags); |
642 | #else | |
643 | (void) chflags(name, flags); | |
644 | #endif | |
645 | skipfile(); | |
646 | utimes(name, timep); | |
647 | return (GOOD); | |
648 | ||
b45f51d6 SP |
649 | case IFCHR: |
650 | case IFBLK: | |
651 | vprintf(stdout, "extract special file %s\n", name); | |
1227625a SP |
652 | if (Nflag) { |
653 | skipfile(); | |
654 | return (GOOD); | |
655 | } | |
b45f51d6 SP |
656 | if (uflag) |
657 | (void)unlink(name); | |
658 | if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) { | |
659 | fprintf(stderr, "%s: cannot create special file: %s\n", | |
1227625a SP |
660 | name, strerror(errno)); |
661 | skipfile(); | |
662 | return (FAIL); | |
663 | } | |
664 | (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid); | |
665 | (void) chmod(name, mode); | |
666 | #ifdef __linux__ | |
667 | (void) fsetflags(name, flags); | |
668 | #else | |
669 | (void) chflags(name, flags); | |
670 | #endif | |
671 | skipfile(); | |
672 | utimes(name, timep); | |
673 | return (GOOD); | |
674 | ||
675 | case IFREG: | |
676 | vprintf(stdout, "extract file %s\n", name); | |
677 | if (Nflag) { | |
678 | skipfile(); | |
679 | return (GOOD); | |
680 | } | |
b45f51d6 SP |
681 | if (uflag) |
682 | (void)unlink(name); | |
1227625a SP |
683 | if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, |
684 | 0666)) < 0) { | |
685 | fprintf(stderr, "%s: cannot create file: %s\n", | |
686 | name, strerror(errno)); | |
687 | skipfile(); | |
688 | return (FAIL); | |
689 | } | |
690 | (void) fchown(ofile, curfile.dip->di_uid, curfile.dip->di_gid); | |
691 | (void) fchmod(ofile, mode); | |
692 | #ifdef __linux__ | |
693 | (void) fsetflags(ofile, flags); | |
694 | #else | |
695 | (void) fchflags(ofile, flags); | |
696 | #endif | |
697 | getfile(xtrfile, xtrskip); | |
698 | (void) close(ofile); | |
699 | utimes(name, timep); | |
700 | return (GOOD); | |
701 | } | |
702 | /* NOTREACHED */ | |
703 | } | |
704 | ||
705 | /* | |
706 | * skip over bit maps on the tape | |
707 | */ | |
708 | void | |
709 | skipmaps() | |
710 | { | |
711 | ||
712 | while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI) | |
713 | skipfile(); | |
714 | } | |
715 | ||
716 | /* | |
717 | * skip over a file on the tape | |
718 | */ | |
719 | void | |
720 | skipfile() | |
721 | { | |
722 | ||
723 | curfile.action = SKIP; | |
724 | getfile(xtrnull, xtrnull); | |
725 | } | |
726 | ||
727 | /* | |
728 | * Extract a file from the tape. | |
729 | * When an allocated block is found it is passed to the fill function; | |
730 | * when an unallocated block (hole) is found, a zeroed buffer is passed | |
731 | * to the skip function. | |
732 | */ | |
733 | void | |
734 | getfile(fill, skip) | |
735 | void (*fill) __P((char *, long)); | |
736 | void (*skip) __P((char *, long)); | |
737 | { | |
738 | register int i; | |
739 | int curblk = 0; | |
740 | quad_t size = spcl.c_dinode.di_size; | |
741 | int last_write_was_hole = 0; | |
742 | long origsize = size; | |
743 | static char clearedbuf[MAXBSIZE]; | |
744 | char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE]; | |
745 | char junk[TP_BSIZE]; | |
746 | ||
747 | if (spcl.c_type == TS_END) | |
748 | panic("ran off end of tape\n"); | |
749 | if (spcl.c_magic != NFS_MAGIC) | |
750 | panic("not at beginning of a file\n"); | |
751 | if (!gettingfile && setjmp(restart) != 0) | |
752 | return; | |
753 | gettingfile++; | |
754 | loop: | |
755 | for (i = 0; i < spcl.c_count; i++) { | |
b45f51d6 | 756 | if (readmapflag || spcl.c_addr[i]) { |
1227625a SP |
757 | readtape(&buf[curblk++][0]); |
758 | if (curblk == fssize / TP_BSIZE) { | |
759 | (*fill)((char *)buf, (long)(size > TP_BSIZE ? | |
760 | fssize : (curblk - 1) * TP_BSIZE + size)); | |
761 | curblk = 0; | |
762 | last_write_was_hole = 0; | |
763 | } | |
764 | } else { | |
765 | if (curblk > 0) { | |
766 | (*fill)((char *)buf, (long)(size > TP_BSIZE ? | |
767 | curblk * TP_BSIZE : | |
768 | (curblk - 1) * TP_BSIZE + size)); | |
769 | curblk = 0; | |
770 | } | |
771 | (*skip)(clearedbuf, (long)(size > TP_BSIZE ? | |
772 | TP_BSIZE : size)); | |
773 | last_write_was_hole = 1; | |
774 | } | |
775 | if ((size -= TP_BSIZE) <= 0) { | |
776 | for (i++; i < spcl.c_count; i++) | |
b45f51d6 | 777 | if (readmapflag || spcl.c_addr[i]) |
1227625a SP |
778 | readtape(junk); |
779 | break; | |
780 | } | |
781 | } | |
782 | if (gethead(&spcl) == GOOD && size > 0) { | |
783 | if (spcl.c_type == TS_ADDR) | |
784 | goto loop; | |
785 | dprintf(stdout, | |
b45f51d6 | 786 | "Missing address (header) block for %s at %ld blocks\n", |
1227625a SP |
787 | curfile.name, blksread); |
788 | } | |
789 | if (curblk > 0) { | |
b45f51d6 | 790 | (*fill)((char *)buf, (long)((curblk * TP_BSIZE) + size)); |
1227625a SP |
791 | last_write_was_hole = 0; |
792 | } | |
793 | if (last_write_was_hole) { | |
794 | ftruncate(ofile, origsize); | |
795 | } | |
796 | findinode(&spcl); | |
797 | gettingfile = 0; | |
798 | } | |
799 | ||
800 | /* | |
801 | * Write out the next block of a file. | |
802 | */ | |
803 | static void | |
804 | xtrfile(buf, size) | |
805 | char *buf; | |
806 | long size; | |
807 | { | |
808 | ||
809 | if (Nflag) | |
810 | return; | |
811 | if (write(ofile, buf, (int) size) == -1) { | |
812 | fprintf(stderr, | |
b45f51d6 | 813 | "write error extracting inode %ld, name %s\nwrite: %s\n", |
1227625a SP |
814 | curfile.ino, curfile.name, strerror(errno)); |
815 | done(1); | |
816 | } | |
817 | } | |
818 | ||
819 | /* | |
820 | * Skip over a hole in a file. | |
821 | */ | |
822 | /* ARGSUSED */ | |
823 | static void | |
824 | xtrskip(buf, size) | |
825 | char *buf; | |
826 | long size; | |
827 | { | |
828 | ||
829 | if (lseek(ofile, size, SEEK_CUR) == -1) { | |
830 | fprintf(stderr, | |
b45f51d6 | 831 | "seek error extracting inode %ld, name %s\nlseek: %s\n", |
1227625a SP |
832 | curfile.ino, curfile.name, strerror(errno)); |
833 | done(1); | |
834 | } | |
835 | } | |
836 | ||
837 | /* | |
838 | * Collect the next block of a symbolic link. | |
839 | */ | |
840 | static void | |
841 | xtrlnkfile(buf, size) | |
842 | char *buf; | |
843 | long size; | |
844 | { | |
845 | ||
846 | pathlen += size; | |
847 | if (pathlen > MAXPATHLEN) { | |
848 | fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n", | |
849 | curfile.name, lnkbuf, buf, pathlen); | |
850 | done(1); | |
851 | } | |
852 | (void) strcat(lnkbuf, buf); | |
853 | } | |
854 | ||
855 | /* | |
856 | * Skip over a hole in a symbolic link (should never happen). | |
857 | */ | |
858 | /* ARGSUSED */ | |
859 | static void | |
860 | xtrlnkskip(buf, size) | |
861 | char *buf; | |
862 | long size; | |
863 | { | |
864 | ||
865 | fprintf(stderr, "unallocated block in symbolic link %s\n", | |
866 | curfile.name); | |
867 | done(1); | |
868 | } | |
869 | ||
870 | /* | |
871 | * Collect the next block of a bit map. | |
872 | */ | |
873 | static void | |
874 | xtrmap(buf, size) | |
875 | char *buf; | |
876 | long size; | |
877 | { | |
878 | ||
879 | memmove(map, buf, size); | |
880 | map += size; | |
881 | } | |
882 | ||
883 | /* | |
884 | * Skip over a hole in a bit map (should never happen). | |
885 | */ | |
886 | /* ARGSUSED */ | |
887 | static void | |
888 | xtrmapskip(buf, size) | |
889 | char *buf; | |
890 | long size; | |
891 | { | |
892 | ||
893 | panic("hole in map\n"); | |
894 | map += size; | |
895 | } | |
896 | ||
897 | /* | |
898 | * Noop, when an extraction function is not needed. | |
899 | */ | |
900 | /* ARGSUSED */ | |
901 | void | |
902 | xtrnull(buf, size) | |
903 | char *buf; | |
904 | long size; | |
905 | { | |
906 | ||
907 | return; | |
908 | } | |
909 | ||
910 | int | |
911 | do_cmpfiles(int fd_tape, int fd_disk, long size) | |
912 | { | |
913 | #ifndef BUFSIZE | |
914 | #define BUFSIZE 1024 | |
915 | #endif | |
916 | static char buf_tape[BUFSIZ]; | |
917 | static char buf_disk[BUFSIZ]; | |
1227625a SP |
918 | int n_tape; |
919 | int n_disk; | |
920 | ||
921 | while (size > 0) { | |
922 | if ((n_tape = read(fd_tape, buf_tape, BUFSIZE)) < 1) { | |
923 | close(fd_tape), close(fd_disk); | |
924 | panic("do_cmpfiles: unexpected EOF[1]"); | |
925 | } | |
926 | if ((n_disk = read(fd_disk, buf_disk, BUFSIZE)) < 1) { | |
927 | close(fd_tape), close(fd_disk); | |
928 | panic("do_cmpfiles: unexpected EOF[2]"); | |
929 | } | |
930 | if (n_tape != n_disk) { | |
931 | close(fd_tape), close(fd_disk); | |
932 | panic("do_cmpfiles: sizes different!"); | |
933 | } | |
934 | if (memcmp(buf_tape, buf_disk, n_tape) != 0) return (1); | |
935 | size -= n_tape; | |
936 | } | |
937 | return (0); | |
938 | } | |
939 | ||
940 | /* for debugging compare problems */ | |
941 | #undef COMPARE_FAIL_KEEP_FILE | |
942 | ||
943 | #ifdef COMPARE_FAIL_KEEP_FILE | |
944 | /* return true if tapefile should be unlinked after compare */ | |
945 | int | |
946 | #else | |
947 | void | |
948 | #endif | |
949 | cmpfiles(char *tapefile, char *diskfile, struct stat *sbuf_disk) | |
950 | { | |
951 | struct stat sbuf_tape; | |
952 | int fd_tape, fd_disk; | |
953 | ||
954 | if (stat(tapefile, &sbuf_tape) != 0) { | |
955 | panic("Can't lstat tmp file %s: %s\n", tapefile, | |
956 | strerror(errno)); | |
957 | } | |
958 | ||
959 | if (sbuf_disk->st_size != sbuf_tape.st_size) { | |
960 | fprintf(stderr, | |
b45f51d6 | 961 | "%s: size changed from %ld to %ld.\n", |
1227625a SP |
962 | diskfile, sbuf_tape.st_size, sbuf_disk->st_size); |
963 | #ifdef COMPARE_FAIL_KEEP_FILE | |
964 | return (0); | |
965 | #else | |
966 | return; | |
967 | #endif | |
968 | } | |
969 | ||
970 | if ((fd_tape = open(tapefile, O_RDONLY)) < 0) { | |
971 | panic("Can't open %s: %s\n", tapefile, strerror(errno)); | |
972 | } | |
973 | if ((fd_disk = open(diskfile, O_RDONLY)) < 0) { | |
974 | close(fd_tape); | |
975 | panic("Can't open %s: %s\n", diskfile, strerror(errno)); | |
976 | } | |
977 | ||
978 | if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) { | |
979 | fprintf(stderr, "%s: tape and disk copies are different\n", | |
980 | diskfile); | |
981 | close(fd_tape); | |
982 | close(fd_disk); | |
983 | #ifdef COMPARE_FAIL_KEEP_FILE | |
984 | /* rename the file to live in /tmp */ | |
985 | /* rename `tapefile' to /tmp/<basename of diskfile> */ | |
986 | { | |
987 | char *p = strrchr(diskfile, '/'); | |
988 | char newname[MAXPATHLEN]; | |
989 | if (!p) { | |
990 | panic("can't find / in %s\n", diskfile); | |
991 | } | |
992 | sprintf(newname, "%s/debug/%s", tmpdir, p + 1); | |
993 | if (rename(tapefile, newname)) { | |
994 | panic("rename from %s to %s failed: %s\n", | |
995 | tapefile, newname, | |
996 | strerror(errno)); | |
997 | } else { | |
998 | fprintf(stderr, "*** %s saved to %s\n", | |
999 | tapefile, newname); | |
1000 | } | |
1001 | } | |
1002 | ||
1003 | /* don't unlink the file (it's not there anymore */ | |
1004 | /* anyway) */ | |
1005 | return (0); | |
1006 | #else | |
1007 | return; | |
1008 | #endif | |
1009 | } | |
1010 | close(fd_tape); | |
1011 | close(fd_disk); | |
1012 | #ifdef COMPARE_FAIL_KEEP_FILE | |
1013 | return (1); | |
1014 | #endif | |
1015 | } | |
1016 | ||
1017 | static char tmpfilename[128]; | |
1018 | ||
1019 | void | |
1020 | comparefile(name) | |
1021 | char *name; | |
1022 | { | |
1023 | static char *tmpfile = NULL; | |
1024 | int mode; | |
1025 | struct stat sb, stemp; | |
1026 | int r; | |
1027 | ||
1028 | if ((r = lstat(name, &sb)) != 0) { | |
1029 | fprintf(stderr, "%s: does not exist (%d, %d).\n", name, r, errno); | |
1030 | skipfile(); | |
1031 | return; | |
1032 | } | |
1033 | ||
1034 | curfile.name = name; | |
b45f51d6 | 1035 | curfile.action = USING; |
1227625a SP |
1036 | mode = curfile.dip->di_mode; |
1037 | ||
b45f51d6 | 1038 | vprintf(stdout, "comparing %s (size: %ld, mode: 0%o)\n", name, |
1227625a SP |
1039 | sb.st_size, mode); |
1040 | ||
1041 | if (sb.st_mode != mode) { | |
1042 | fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n", | |
1043 | name, mode & 07777, sb.st_mode & 07777); | |
1044 | } | |
1045 | switch (mode & IFMT) { | |
1046 | default: | |
1047 | skipfile(); | |
1048 | return; | |
1049 | ||
1050 | case IFSOCK: | |
1051 | skipfile(); | |
1052 | return; | |
1053 | ||
1054 | case IFDIR: | |
1055 | skipfile(); | |
1056 | return; | |
1057 | ||
1058 | case IFLNK: { | |
1059 | char lbuf[MAXPATHLEN + 1]; | |
1060 | int lsize; | |
1061 | ||
1062 | if (!(sb.st_mode & S_IFLNK)) { | |
1063 | fprintf(stderr, "%s: is no longer a symbolic link\n", | |
1064 | name); | |
1065 | return; | |
1066 | } | |
1067 | lnkbuf[0] = '\0'; | |
1068 | pathlen = 0; | |
1069 | getfile(xtrlnkfile, xtrlnkskip); | |
1070 | if (pathlen == 0) { | |
1071 | fprintf(stderr, | |
1072 | "%s: zero length symbolic link (ignored)\n", | |
1073 | name); | |
1074 | return; | |
1075 | } | |
1076 | if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) { | |
1077 | panic("readlink of %s failed: %s", name, | |
1078 | strerror(errno)); | |
1079 | } | |
1080 | lbuf[lsize] = 0; | |
1081 | if (strcmp(lbuf, lnkbuf) != 0) { | |
1082 | fprintf(stderr, | |
1083 | "%s: symbolic link changed from %s to %s.\n", | |
1084 | name, lnkbuf, lbuf); | |
1085 | return; | |
1086 | } | |
1087 | return; | |
1088 | } | |
1089 | ||
1090 | case IFCHR: | |
1091 | case IFBLK: | |
1092 | if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) { | |
1093 | fprintf(stderr, "%s: no longer a special file\n", | |
1094 | name); | |
1095 | skipfile(); | |
1096 | return; | |
1097 | } | |
1098 | ||
1099 | if (sb.st_rdev != (int)curfile.dip->di_rdev) { | |
1100 | fprintf(stderr, | |
1101 | "%s: device changed from %d,%d to %d,%d.\n", | |
1102 | name, | |
1103 | ((int)curfile.dip->di_rdev >> 8) & 0xf, | |
1104 | (int)curfile.dip->di_rdev & 0xf, | |
b45f51d6 SP |
1105 | ((int)sb.st_rdev >> 8) & 0xf, |
1106 | (int)sb.st_rdev & 0xf); | |
1227625a SP |
1107 | } |
1108 | skipfile(); | |
1109 | return; | |
1110 | ||
1111 | case IFREG: | |
1112 | if (tmpfile == NULL) { | |
1113 | /* argument to mktemp() must not be in RO space: */ | |
1114 | sprintf(tmpfilename, "%s/restoreCXXXXXX", tmpdir); | |
1115 | tmpfile = mktemp(&tmpfilename[0]); | |
1116 | } | |
1117 | if ((stat(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) { | |
1118 | panic("cannot delete tmp file %s: %s\n", | |
1119 | tmpfile, strerror(errno)); | |
1120 | } | |
1121 | if ((ofile = creat(tmpfile, 0600)) < 0) { | |
1122 | panic("cannot create file temp file %s: %s\n", | |
1123 | name, strerror(errno)); | |
1124 | } | |
1125 | getfile(xtrfile, xtrskip); | |
1126 | (void) close(ofile); | |
1127 | #ifdef COMPARE_FAIL_KEEP_FILE | |
1128 | if (cmpfiles(tmpfile, name, &sb)) | |
1129 | unlink(tmpfile); | |
1130 | #else | |
1131 | cmpfiles(tmpfile, name, &sb); | |
1132 | unlink(tmpfile); | |
1133 | #endif | |
1134 | return; | |
1135 | } | |
1136 | /* NOTREACHED */ | |
1137 | } | |
1138 | ||
1139 | /* | |
1140 | * Read TP_BSIZE blocks from the input. | |
1141 | * Handle read errors, and end of media. | |
1142 | */ | |
1143 | static void | |
1144 | readtape(buf) | |
1145 | char *buf; | |
1146 | { | |
1147 | long rd, newvol, i; | |
1148 | int cnt, seek_failed; | |
1149 | ||
1150 | if (blkcnt < numtrec) { | |
1151 | memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE); | |
1152 | blksread++; | |
1153 | tpblksread++; | |
1154 | return; | |
1155 | } | |
1156 | for (i = 0; i < ntrec; i++) | |
1157 | ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; | |
1158 | if (numtrec == 0) | |
1159 | numtrec = ntrec; | |
1160 | cnt = ntrec * TP_BSIZE; | |
1161 | rd = 0; | |
1162 | getmore: | |
1163 | #ifdef RRESTORE | |
1164 | if (host) | |
1165 | i = rmtread(&tapebuf[rd], cnt); | |
1166 | else | |
1167 | #endif | |
1168 | i = read(mt, &tapebuf[rd], cnt); | |
1169 | /* | |
1170 | * Check for mid-tape short read error. | |
1171 | * If found, skip rest of buffer and start with the next. | |
1172 | */ | |
1173 | if (!pipein && numtrec < ntrec && i > 0) { | |
1174 | dprintf(stdout, "mid-media short read error.\n"); | |
1175 | numtrec = ntrec; | |
1176 | } | |
1177 | /* | |
1178 | * Handle partial block read. | |
1179 | */ | |
1180 | if (pipein && i == 0 && rd > 0) | |
1181 | i = rd; | |
1182 | else if (i > 0 && i != ntrec * TP_BSIZE) { | |
1183 | if (pipein) { | |
1184 | rd += i; | |
1185 | cnt -= i; | |
1186 | if (cnt > 0) | |
1187 | goto getmore; | |
1188 | i = rd; | |
1189 | } else { | |
1190 | /* | |
1191 | * Short read. Process the blocks read. | |
1192 | */ | |
1193 | if (i % TP_BSIZE != 0) | |
1194 | vprintf(stdout, | |
b45f51d6 | 1195 | "partial block read: %ld should be %ld\n", |
1227625a SP |
1196 | i, ntrec * TP_BSIZE); |
1197 | numtrec = i / TP_BSIZE; | |
1198 | } | |
1199 | } | |
1200 | /* | |
1201 | * Handle read error. | |
1202 | */ | |
1203 | if (i < 0) { | |
1204 | fprintf(stderr, "Tape read error while "); | |
1205 | switch (curfile.action) { | |
1206 | default: | |
1207 | fprintf(stderr, "trying to set up tape\n"); | |
1208 | break; | |
1209 | case UNKNOWN: | |
1210 | fprintf(stderr, "trying to resynchronize\n"); | |
1211 | break; | |
1212 | case USING: | |
1213 | fprintf(stderr, "restoring %s\n", curfile.name); | |
1214 | break; | |
1215 | case SKIP: | |
b45f51d6 | 1216 | fprintf(stderr, "skipping over inode %ld\n", |
1227625a SP |
1217 | curfile.ino); |
1218 | break; | |
1219 | } | |
1220 | if (!yflag && !reply("continue")) | |
1221 | done(1); | |
1222 | i = ntrec * TP_BSIZE; | |
1223 | memset(tapebuf, 0, i); | |
1224 | #ifdef RRESTORE | |
1225 | if (host) | |
1226 | seek_failed = (rmtseek(i, 1) < 0); | |
1227 | else | |
1228 | #endif | |
1229 | seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1); | |
1230 | ||
1231 | if (seek_failed) { | |
1232 | fprintf(stderr, | |
1233 | "continuation failed: %s\n", strerror(errno)); | |
1234 | done(1); | |
1235 | } | |
1236 | } | |
1237 | /* | |
1238 | * Handle end of tape. | |
1239 | */ | |
1240 | if (i == 0) { | |
1241 | vprintf(stdout, "End-of-tape encountered\n"); | |
1242 | if (!pipein) { | |
1243 | newvol = volno + 1; | |
1244 | volno = 0; | |
1245 | numtrec = 0; | |
1246 | getvol(newvol); | |
1247 | readtape(buf); | |
1248 | return; | |
1249 | } | |
1250 | if (rd % TP_BSIZE != 0) | |
1251 | panic("partial block read: %d should be %d\n", | |
1252 | rd, ntrec * TP_BSIZE); | |
1253 | terminateinput(); | |
1254 | memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE); | |
1255 | } | |
1256 | blkcnt = 0; | |
1257 | memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE); | |
1258 | blksread++; | |
1259 | tpblksread++; | |
1260 | } | |
1261 | ||
1262 | static void | |
1263 | findtapeblksize() | |
1264 | { | |
1265 | register long i; | |
1266 | ||
1267 | for (i = 0; i < ntrec; i++) | |
1268 | ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; | |
1269 | blkcnt = 0; | |
1270 | #ifdef RRESTORE | |
1271 | if (host) | |
1272 | i = rmtread(tapebuf, ntrec * TP_BSIZE); | |
1273 | else | |
1274 | #endif | |
1275 | i = read(mt, tapebuf, ntrec * TP_BSIZE); | |
1276 | ||
1277 | if (i <= 0) { | |
1278 | fprintf(stderr, "tape read error: %s\n", strerror(errno)); | |
1279 | done(1); | |
1280 | } | |
1281 | if (i % TP_BSIZE != 0) { | |
b45f51d6 | 1282 | fprintf(stderr, "Tape block size (%ld) %s (%d)\n", |
1227625a SP |
1283 | i, "is not a multiple of dump block size", TP_BSIZE); |
1284 | done(1); | |
1285 | } | |
1286 | ntrec = i / TP_BSIZE; | |
1287 | numtrec = ntrec; | |
b45f51d6 | 1288 | vprintf(stdout, "Tape block size is %ld\n", ntrec); |
1227625a SP |
1289 | } |
1290 | ||
1291 | void | |
1292 | closemt() | |
1293 | { | |
1294 | ||
1295 | if (mt < 0) | |
1296 | return; | |
1297 | #ifdef RRESTORE | |
1298 | if (host) | |
1299 | rmtclose(); | |
1300 | else | |
1301 | #endif | |
1302 | (void) close(mt); | |
1303 | } | |
1304 | ||
1305 | /* | |
1306 | * Read the next block from the tape. | |
1307 | * Check to see if it is one of several vintage headers. | |
1308 | * If it is an old style header, convert it to a new style header. | |
1309 | * If it is not any valid header, return an error. | |
1310 | */ | |
1311 | static int | |
1312 | gethead(buf) | |
1313 | struct s_spcl *buf; | |
1314 | { | |
1315 | long i; | |
1316 | union { | |
1317 | quad_t qval; | |
b45f51d6 | 1318 | int32_t val[2]; |
1227625a SP |
1319 | } qcvt; |
1320 | union u_ospcl { | |
1321 | char dummy[TP_BSIZE]; | |
1322 | struct s_ospcl { | |
b45f51d6 SP |
1323 | int32_t c_type; |
1324 | int32_t c_date; | |
1325 | int32_t c_ddate; | |
1326 | int32_t c_volume; | |
1327 | int32_t c_tapea; | |
1227625a | 1328 | u_short c_inumber; |
b45f51d6 SP |
1329 | int32_t c_magic; |
1330 | int32_t c_checksum; | |
1227625a SP |
1331 | struct odinode { |
1332 | unsigned short odi_mode; | |
1333 | u_short odi_nlink; | |
1334 | u_short odi_uid; | |
1335 | u_short odi_gid; | |
b45f51d6 SP |
1336 | int32_t odi_size; |
1337 | int32_t odi_rdev; | |
1227625a | 1338 | char odi_addr[36]; |
b45f51d6 SP |
1339 | int32_t odi_atime; |
1340 | int32_t odi_mtime; | |
1341 | int32_t odi_ctime; | |
1227625a | 1342 | } c_dinode; |
b45f51d6 | 1343 | int32_t c_count; |
1227625a SP |
1344 | char c_addr[256]; |
1345 | } s_ospcl; | |
1346 | } u_ospcl; | |
1347 | ||
1348 | if (!cvtflag) { | |
1349 | readtape((char *)buf); | |
1350 | if (buf->c_magic != NFS_MAGIC) { | |
1351 | if (swabl(buf->c_magic) != NFS_MAGIC) | |
1352 | return (FAIL); | |
1353 | if (!Bcvt) { | |
1354 | vprintf(stdout, "Note: Doing Byte swapping\n"); | |
1355 | Bcvt = 1; | |
1356 | } | |
1357 | } | |
1358 | if (checksum((int *)buf) == FAIL) | |
1359 | return (FAIL); | |
b45f51d6 | 1360 | if (Bcvt) { |
1227625a | 1361 | swabst((u_char *)"8l4s31l", (u_char *)buf); |
b45f51d6 SP |
1362 | swabst((u_char *)"l",(u_char *) &buf->c_level); |
1363 | swabst((u_char *)"2l",(u_char *) &buf->c_flags); | |
1364 | } | |
1227625a SP |
1365 | goto good; |
1366 | } | |
1367 | readtape((char *)(&u_ospcl.s_ospcl)); | |
b45f51d6 | 1368 | memset(buf, 0, (long)TP_BSIZE); |
1227625a SP |
1369 | buf->c_type = u_ospcl.s_ospcl.c_type; |
1370 | buf->c_date = u_ospcl.s_ospcl.c_date; | |
1371 | buf->c_ddate = u_ospcl.s_ospcl.c_ddate; | |
1372 | buf->c_volume = u_ospcl.s_ospcl.c_volume; | |
1373 | buf->c_tapea = u_ospcl.s_ospcl.c_tapea; | |
1374 | buf->c_inumber = u_ospcl.s_ospcl.c_inumber; | |
1375 | buf->c_checksum = u_ospcl.s_ospcl.c_checksum; | |
1376 | buf->c_magic = u_ospcl.s_ospcl.c_magic; | |
1377 | buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode; | |
1378 | buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink; | |
1379 | buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid; | |
1380 | buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid; | |
1381 | buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size; | |
1382 | buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev; | |
1383 | #ifdef __linux__ | |
1384 | buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime; | |
1385 | buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime; | |
1386 | buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime; | |
1387 | #else /* __linux__ */ | |
1388 | buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime; | |
1389 | buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime; | |
1390 | buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime; | |
1391 | #endif /* __linux__ */ | |
1392 | buf->c_count = u_ospcl.s_ospcl.c_count; | |
1393 | memmove(buf->c_addr, u_ospcl.s_ospcl.c_addr, (long)256); | |
1394 | if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC || | |
1395 | checksum((int *)(&u_ospcl.s_ospcl)) == FAIL) | |
1396 | return(FAIL); | |
1397 | buf->c_magic = NFS_MAGIC; | |
1398 | ||
1399 | good: | |
1400 | if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) && | |
1401 | (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) { | |
1402 | qcvt.qval = buf->c_dinode.di_size; | |
1403 | if (qcvt.val[0] || qcvt.val[1]) { | |
1404 | printf("Note: Doing Quad swapping\n"); | |
1405 | Qcvt = 1; | |
1406 | } | |
1407 | } | |
1408 | if (Qcvt) { | |
1409 | qcvt.qval = buf->c_dinode.di_size; | |
1410 | i = qcvt.val[1]; | |
1411 | qcvt.val[1] = qcvt.val[0]; | |
1412 | qcvt.val[0] = i; | |
1413 | buf->c_dinode.di_size = qcvt.qval; | |
1414 | } | |
b45f51d6 | 1415 | readmapflag = 0; |
1227625a SP |
1416 | |
1417 | switch (buf->c_type) { | |
1418 | ||
1419 | case TS_CLRI: | |
1420 | case TS_BITS: | |
1421 | /* | |
1422 | * Have to patch up missing information in bit map headers | |
1423 | */ | |
1424 | buf->c_inumber = 0; | |
1425 | buf->c_dinode.di_size = buf->c_count * TP_BSIZE; | |
b45f51d6 SP |
1426 | if (buf->c_count > TP_NINDIR) |
1427 | readmapflag = 1; | |
1428 | else | |
1429 | for (i = 0; i < buf->c_count; i++) | |
1430 | buf->c_addr[i]++; | |
1227625a SP |
1431 | break; |
1432 | ||
1433 | case TS_TAPE: | |
1434 | if ((buf->c_flags & DR_NEWINODEFMT) == 0) | |
1435 | oldinofmt = 1; | |
1436 | /* fall through */ | |
1437 | case TS_END: | |
1438 | buf->c_inumber = 0; | |
1439 | break; | |
1440 | ||
1441 | case TS_INODE: | |
1442 | case TS_ADDR: | |
1443 | break; | |
1444 | ||
1445 | default: | |
1446 | panic("gethead: unknown inode type %d\n", buf->c_type); | |
1447 | break; | |
1448 | } | |
1449 | /* | |
b45f51d6 | 1450 | * If we are restoring a filesystem with old format inodes, |
1227625a SP |
1451 | * copy the uid/gid to the new location. |
1452 | */ | |
1453 | if (oldinofmt) { | |
1454 | buf->c_dinode.di_uid = buf->c_dinode.di_ouid; | |
1455 | buf->c_dinode.di_gid = buf->c_dinode.di_ogid; | |
1456 | } | |
1457 | if (dflag) | |
1458 | accthdr(buf); | |
1459 | return(GOOD); | |
1460 | } | |
1461 | ||
1462 | /* | |
1463 | * Check that a header is where it belongs and predict the next header | |
1464 | */ | |
1465 | static void | |
1466 | accthdr(header) | |
1467 | struct s_spcl *header; | |
1468 | { | |
1469 | static ino_t previno = 0x7fffffff; | |
1470 | static int prevtype; | |
1471 | static long predict; | |
1472 | long blks, i; | |
1473 | ||
1474 | if (header->c_type == TS_TAPE) { | |
1475 | fprintf(stderr, "Volume header (%s inode format) ", | |
1476 | oldinofmt ? "old" : "new"); | |
1477 | if (header->c_firstrec) | |
1478 | fprintf(stderr, "begins with record %d", | |
1479 | header->c_firstrec); | |
1480 | fprintf(stderr, "\n"); | |
1481 | previno = 0x7fffffff; | |
1482 | return; | |
1483 | } | |
1484 | if (previno == 0x7fffffff) | |
1485 | goto newcalc; | |
1486 | switch (prevtype) { | |
1487 | case TS_BITS: | |
1488 | fprintf(stderr, "Dumped inodes map header"); | |
1489 | break; | |
1490 | case TS_CLRI: | |
1491 | fprintf(stderr, "Used inodes map header"); | |
1492 | break; | |
1493 | case TS_INODE: | |
b45f51d6 | 1494 | fprintf(stderr, "File header, ino %ld", previno); |
1227625a SP |
1495 | break; |
1496 | case TS_ADDR: | |
b45f51d6 | 1497 | fprintf(stderr, "File continuation header, ino %ld", previno); |
1227625a SP |
1498 | break; |
1499 | case TS_END: | |
1500 | fprintf(stderr, "End of tape header"); | |
1501 | break; | |
1502 | } | |
1503 | if (predict != blksread - 1) | |
b45f51d6 | 1504 | fprintf(stderr, "; predicted %ld blocks, got %ld blocks", |
1227625a SP |
1505 | predict, blksread - 1); |
1506 | fprintf(stderr, "\n"); | |
1507 | newcalc: | |
1508 | blks = 0; | |
1509 | if (header->c_type != TS_END) | |
1510 | for (i = 0; i < header->c_count; i++) | |
b45f51d6 | 1511 | if (readmapflag || header->c_addr[i] != 0) |
1227625a SP |
1512 | blks++; |
1513 | predict = blks; | |
1514 | blksread = 0; | |
1515 | prevtype = header->c_type; | |
1516 | previno = header->c_inumber; | |
1517 | } | |
1518 | ||
1519 | /* | |
1520 | * Find an inode header. | |
1521 | * Complain if had to skip, and complain is set. | |
1522 | */ | |
1523 | static void | |
1524 | findinode(header) | |
1525 | struct s_spcl *header; | |
1526 | { | |
1527 | static long skipcnt = 0; | |
1528 | long i; | |
1529 | char buf[TP_BSIZE]; | |
1530 | ||
1531 | curfile.name = "<name unknown>"; | |
1532 | curfile.action = UNKNOWN; | |
1533 | curfile.dip = NULL; | |
1534 | curfile.ino = 0; | |
1535 | do { | |
1536 | if (header->c_magic != NFS_MAGIC) { | |
1537 | skipcnt++; | |
1538 | while (gethead(header) == FAIL || | |
1539 | header->c_date != dumpdate) | |
1540 | skipcnt++; | |
1541 | } | |
1542 | switch (header->c_type) { | |
1543 | ||
1544 | case TS_ADDR: | |
1545 | /* | |
1546 | * Skip up to the beginning of the next record | |
1547 | */ | |
1548 | for (i = 0; i < header->c_count; i++) | |
1549 | if (header->c_addr[i]) | |
1550 | readtape(buf); | |
1551 | while (gethead(header) == FAIL || | |
1552 | header->c_date != dumpdate) | |
1553 | skipcnt++; | |
1554 | break; | |
1555 | ||
1556 | case TS_INODE: | |
1557 | curfile.dip = &header->c_dinode; | |
1558 | curfile.ino = header->c_inumber; | |
1559 | break; | |
1560 | ||
1561 | case TS_END: | |
1562 | curfile.ino = maxino; | |
1563 | break; | |
1564 | ||
1565 | case TS_CLRI: | |
1566 | curfile.name = "<file removal list>"; | |
1567 | break; | |
1568 | ||
1569 | case TS_BITS: | |
1570 | curfile.name = "<file dump list>"; | |
1571 | break; | |
1572 | ||
1573 | case TS_TAPE: | |
1574 | panic("unexpected tape header\n"); | |
1575 | /* NOTREACHED */ | |
1576 | ||
1577 | default: | |
1578 | panic("unknown tape header type %d\n", spcl.c_type); | |
1579 | /* NOTREACHED */ | |
1580 | ||
1581 | } | |
1582 | } while (header->c_type == TS_ADDR); | |
1583 | if (skipcnt > 0) | |
b45f51d6 SP |
1584 | fprintf(stderr, "resync restore, skipped %ld blocks\n", |
1585 | skipcnt); | |
1227625a SP |
1586 | skipcnt = 0; |
1587 | } | |
1588 | ||
1589 | static int | |
1590 | checksum(buf) | |
1591 | register int *buf; | |
1592 | { | |
1593 | register int i, j; | |
1594 | ||
1595 | j = sizeof(union u_spcl) / sizeof(int); | |
1596 | i = 0; | |
1597 | if(!Bcvt) { | |
1598 | do | |
1599 | i += *buf++; | |
1600 | while (--j); | |
1601 | } else { | |
1602 | /* What happens if we want to read restore tapes | |
1603 | for a 16bit int machine??? */ | |
b45f51d6 | 1604 | do |
1227625a SP |
1605 | i += swabl(*buf++); |
1606 | while (--j); | |
1607 | } | |
b45f51d6 | 1608 | |
1227625a | 1609 | if (i != CHECKSUM) { |
b45f51d6 | 1610 | fprintf(stderr, "Checksum error %o, inode %ld file %s\n", i, |
1227625a SP |
1611 | curfile.ino, curfile.name); |
1612 | return(FAIL); | |
1613 | } | |
1614 | return(GOOD); | |
1615 | } | |
1616 | ||
1617 | #ifdef RRESTORE | |
1618 | #if __STDC__ | |
1619 | #include <stdarg.h> | |
1620 | #else | |
1621 | #include <varargs.h> | |
1622 | #endif | |
1623 | ||
1624 | void | |
1625 | #if __STDC__ | |
1626 | msg(const char *fmt, ...) | |
1627 | #else | |
1628 | msg(fmt, va_alist) | |
1629 | char *fmt; | |
1630 | va_dcl | |
1631 | #endif | |
1632 | { | |
1633 | va_list ap; | |
1634 | #if __STDC__ | |
1635 | va_start(ap, fmt); | |
1636 | #else | |
1637 | va_start(ap); | |
1638 | #endif | |
1639 | (void)vfprintf(stderr, fmt, ap); | |
1640 | va_end(ap); | |
1641 | } | |
1642 | #endif /* RRESTORE */ | |
1643 | ||
1644 | static u_char * | |
1645 | swabshort(sp, n) | |
1646 | register u_char *sp; | |
1647 | register int n; | |
1648 | { | |
1649 | char c; | |
1650 | ||
1651 | while (--n >= 0) { | |
1652 | c = sp[0]; sp[0] = sp[1]; sp[1] = c; | |
1653 | sp += 2; | |
1654 | } | |
1655 | return (sp); | |
1656 | } | |
1657 | ||
1658 | static u_char * | |
1659 | swablong(sp, n) | |
1660 | register u_char *sp; | |
1661 | register int n; | |
1662 | { | |
1663 | char c; | |
1664 | ||
1665 | while (--n >= 0) { | |
1666 | c = sp[0]; sp[0] = sp[3]; sp[3] = c; | |
1667 | c = sp[2]; sp[2] = sp[1]; sp[1] = c; | |
1668 | sp += 4; | |
1669 | } | |
1670 | return (sp); | |
1671 | } | |
1672 | ||
1673 | void | |
1674 | swabst(cp, sp) | |
1675 | register u_char *cp, *sp; | |
1676 | { | |
1677 | int n = 0; | |
1678 | ||
1679 | while (*cp) { | |
1680 | switch (*cp) { | |
1681 | case '0': case '1': case '2': case '3': case '4': | |
1682 | case '5': case '6': case '7': case '8': case '9': | |
1683 | n = (n * 10) + (*cp++ - '0'); | |
1684 | continue; | |
b45f51d6 | 1685 | |
1227625a SP |
1686 | case 's': case 'w': case 'h': |
1687 | if (n == 0) | |
1688 | n = 1; | |
1689 | sp = swabshort(sp, n); | |
1690 | break; | |
1691 | ||
1692 | case 'l': | |
1693 | if (n == 0) | |
1694 | n = 1; | |
1695 | sp = swablong(sp, n); | |
1696 | break; | |
1697 | ||
1698 | default: /* Any other character, like 'b' counts as byte. */ | |
1699 | if (n == 0) | |
1700 | n = 1; | |
1701 | sp += n; | |
1702 | break; | |
1703 | } | |
1704 | cp++; | |
1705 | n = 0; | |
1706 | } | |
1707 | } | |
1708 | ||
1709 | static u_long | |
1710 | swabl(x) | |
1711 | u_long x; | |
1712 | { | |
1713 | swabst((u_char *)"l", (u_char *)&x); | |
1714 | return (x); | |
1715 | } |