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Commit | Line | Data |
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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 <pop@cybercable.fr>, 1999-2000 | |
6 | */ | |
7 | ||
8 | /* | |
9 | * Copyright (c) 1983, 1993 | |
10 | * The Regents of the University of California. All rights reserved. | |
11 | * (c) UNIX System Laboratories, Inc. | |
12 | * All or some portions of this file are derived from material licensed | |
13 | * to the University of California by American Telephone and Telegraph | |
14 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with | |
15 | * the permission of UNIX System Laboratories, Inc. | |
16 | * | |
17 | * Redistribution and use in source and binary forms, with or without | |
18 | * modification, are permitted provided that the following conditions | |
19 | * are met: | |
20 | * 1. Redistributions of source code must retain the above copyright | |
21 | * notice, this list of conditions and the following disclaimer. | |
22 | * 2. Redistributions in binary form must reproduce the above copyright | |
23 | * notice, this list of conditions and the following disclaimer in the | |
24 | * documentation and/or other materials provided with the distribution. | |
25 | * 3. All advertising materials mentioning features or use of this software | |
26 | * must display the following acknowledgement: | |
27 | * This product includes software developed by the University of | |
28 | * California, Berkeley and its contributors. | |
29 | * 4. Neither the name of the University nor the names of its contributors | |
30 | * may be used to endorse or promote products derived from this software | |
31 | * without specific prior written permission. | |
32 | * | |
33 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
34 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
35 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
36 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
37 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
38 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
39 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
40 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
41 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
42 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
43 | * SUCH DAMAGE. | |
44 | */ | |
45 | ||
46 | #ifndef lint | |
47 | static const char rcsid[] = | |
48 | "$Id: tape.c,v 1.13 2000/03/02 11:34:51 stelian Exp $"; | |
49 | #endif /* not lint */ | |
50 | ||
51 | #include <sys/param.h> | |
52 | #include <sys/file.h> | |
53 | #include <sys/mtio.h> | |
54 | #include <sys/stat.h> | |
55 | ||
56 | #ifdef __linux__ | |
57 | #include <sys/time.h> | |
58 | #include <linux/ext2_fs.h> | |
59 | #include <bsdcompat.h> | |
60 | #else /* __linux__ */ | |
61 | #include <ufs/ufs/dinode.h> | |
62 | #endif /* __linux__ */ | |
63 | #include <protocols/dumprestore.h> | |
64 | ||
65 | #include <errno.h> | |
66 | #include <compaterr.h> | |
67 | #include <setjmp.h> | |
68 | #include <stdio.h> | |
69 | #include <stdlib.h> | |
70 | #include <string.h> | |
71 | #include <unistd.h> | |
72 | ||
73 | #ifdef __linux__ | |
74 | #include <ext2fs/ext2fs.h> | |
75 | #endif | |
76 | ||
77 | #include "restore.h" | |
78 | #include "extern.h" | |
79 | #include "pathnames.h" | |
80 | ||
81 | static long fssize = MAXBSIZE; | |
82 | static int mt = -1; | |
83 | static int pipein = 0; | |
84 | static char magtape[MAXPATHLEN]; | |
85 | static char magtapeprefix[MAXPATHLEN]; | |
86 | static int blkcnt; | |
87 | static int numtrec; | |
88 | static char *tapebuf; | |
89 | static union u_spcl endoftapemark; | |
90 | static long blksread; /* blocks read since last header */ | |
91 | static long tpblksread = 0; /* TP_BSIZE blocks read */ | |
92 | static long tapesread; | |
93 | static sigjmp_buf restart; | |
94 | static int gettingfile = 0; /* restart has a valid frame */ | |
95 | static char *host = NULL; | |
96 | ||
97 | static int ofile; | |
98 | static char *map; | |
99 | static char lnkbuf[MAXPATHLEN + 1]; | |
100 | static int pathlen; | |
101 | ||
102 | int oldinofmt; /* old inode format conversion required */ | |
103 | int Bcvt; /* Swap Bytes (for CCI or sun) */ | |
104 | static int Qcvt; /* Swap quads (for sun) */ | |
105 | ||
106 | #define FLUSHTAPEBUF() blkcnt = ntrec + 1 | |
107 | ||
108 | static void accthdr __P((struct s_spcl *)); | |
109 | static int checksum __P((int *)); | |
110 | static void findinode __P((struct s_spcl *)); | |
111 | static void findtapeblksize __P((void)); | |
112 | static int gethead __P((struct s_spcl *)); | |
113 | static void readtape __P((char *)); | |
114 | static void setdumpnum __P((void)); | |
115 | static u_int swabi __P((u_int)); | |
116 | static u_long swabl __P((u_long)); | |
117 | static u_char *swab64 __P((u_char *, int)); | |
118 | static u_char *swab32 __P((u_char *, int)); | |
119 | static u_char *swab16 __P((u_char *, int)); | |
120 | static void terminateinput __P((void)); | |
121 | static void xtrfile __P((char *, size_t)); | |
122 | static void xtrlnkfile __P((char *, size_t)); | |
123 | static void xtrlnkskip __P((char *, size_t)); | |
124 | static void xtrmap __P((char *, size_t)); | |
125 | static void xtrmapskip __P((char *, size_t)); | |
126 | static void xtrskip __P((char *, size_t)); | |
127 | ||
128 | static int readmapflag; | |
129 | ||
130 | /* | |
131 | * Set up an input source | |
132 | */ | |
133 | void | |
134 | setinput(char *source) | |
135 | { | |
136 | FLUSHTAPEBUF(); | |
137 | if (bflag) | |
138 | newtapebuf(ntrec); | |
139 | else | |
140 | newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC); | |
141 | terminal = stdin; | |
142 | ||
143 | #ifdef RRESTORE | |
144 | if (strchr(source, ':')) { | |
145 | host = source; | |
146 | source = strchr(host, ':'); | |
147 | *source++ = '\0'; | |
148 | if (rmthost(host) == 0) | |
149 | exit(1); | |
150 | } else | |
151 | #endif | |
152 | if (strcmp(source, "-") == 0) { | |
153 | /* | |
154 | * Since input is coming from a pipe we must establish | |
155 | * our own connection to the terminal. | |
156 | */ | |
157 | terminal = fopen(_PATH_TTY, "r"); | |
158 | if (terminal == NULL) { | |
159 | warn("cannot open %s", _PATH_TTY); | |
160 | terminal = fopen(_PATH_DEVNULL, "r"); | |
161 | if (terminal == NULL) | |
162 | err(1, "cannot open %s", _PATH_DEVNULL); | |
163 | } | |
164 | pipein++; | |
165 | } | |
166 | setuid(getuid()); /* no longer need or want root privileges */ | |
167 | if (Mflag) { | |
168 | strncpy(magtapeprefix, source, MAXPATHLEN); | |
169 | magtapeprefix[MAXPATHLEN-1] = '\0'; | |
170 | snprintf(magtape, MAXPATHLEN, "%s%03d", source, 1); | |
171 | } | |
172 | else | |
173 | strncpy(magtape, source, MAXPATHLEN); | |
174 | magtape[MAXPATHLEN - 1] = '\0'; | |
175 | } | |
176 | ||
177 | void | |
178 | newtapebuf(long size) | |
179 | { | |
180 | static int tapebufsize = -1; | |
181 | ||
182 | ntrec = size; | |
183 | if (size <= tapebufsize) | |
184 | return; | |
185 | if (tapebuf != NULL) | |
186 | free(tapebuf); | |
187 | tapebuf = malloc(size * TP_BSIZE); | |
188 | if (tapebuf == NULL) | |
189 | errx(1, "Cannot allocate space for tape buffer"); | |
190 | tapebufsize = size; | |
191 | } | |
192 | ||
193 | /* | |
194 | * Verify that the tape drive can be accessed and | |
195 | * that it actually is a dump tape. | |
196 | */ | |
197 | void | |
198 | setup(void) | |
199 | { | |
200 | int i, j, *ip; | |
201 | struct stat stbuf; | |
202 | ||
203 | Vprintf(stdout, "Verify tape and initialize maps\n"); | |
204 | #ifdef RRESTORE | |
205 | if (host) | |
206 | mt = rmtopen(magtape, 0); | |
207 | else | |
208 | #endif | |
209 | if (pipein) | |
210 | mt = 0; | |
211 | else | |
212 | mt = open(magtape, O_RDONLY, 0); | |
213 | if (mt < 0) | |
214 | err(1, "%s", magtape); | |
215 | volno = 1; | |
216 | setdumpnum(); | |
217 | FLUSHTAPEBUF(); | |
218 | if (!pipein && !bflag) | |
219 | findtapeblksize(); | |
220 | if (gethead(&spcl) == FAIL) { | |
221 | blkcnt--; /* push back this block */ | |
222 | blksread--; | |
223 | tpblksread--; | |
224 | cvtflag++; | |
225 | if (gethead(&spcl) == FAIL) | |
226 | errx(1, "Tape is not a dump tape"); | |
227 | fprintf(stderr, "Converting to new file system format.\n"); | |
228 | } | |
229 | if (pipein) { | |
230 | endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC; | |
231 | endoftapemark.s_spcl.c_type = TS_END; | |
232 | ip = (int *)&endoftapemark; | |
233 | j = sizeof(union u_spcl) / sizeof(int); | |
234 | i = 0; | |
235 | do | |
236 | i += *ip++; | |
237 | while (--j); | |
238 | endoftapemark.s_spcl.c_checksum = CHECKSUM - i; | |
239 | } | |
240 | if (vflag || command == 't' || command == 'C') | |
241 | printdumpinfo(); | |
242 | if (filesys[0] == '\0') { | |
243 | char *dirptr; | |
244 | printf("spcl.c_filesys = %s\n", spcl.c_filesys); | |
245 | strncpy(filesys, spcl.c_filesys, NAMELEN); | |
246 | filesys[NAMELEN - 1] = '\0'; | |
247 | dirptr = strstr(filesys, " (dir"); | |
248 | printf("dirptr = %s\n", dirptr); | |
249 | if (dirptr != NULL) | |
250 | *dirptr = '\0'; | |
251 | printf("dirptr = %s\n", dirptr); | |
252 | printf("filesys = %s\n", filesys); | |
253 | } | |
254 | dumptime = spcl.c_ddate; | |
255 | dumpdate = spcl.c_date; | |
256 | if (stat(".", &stbuf) < 0) | |
257 | err(1, "cannot stat ."); | |
258 | if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE ) | |
259 | fssize = TP_BSIZE; | |
260 | if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE) | |
261 | fssize = stbuf.st_blksize; | |
262 | if (((fssize - 1) & fssize) != 0) | |
263 | errx(1, "bad block size %ld", fssize); | |
264 | if (spcl.c_volume != 1) | |
265 | errx(1, "Tape is not volume 1 of the dump"); | |
266 | if (gethead(&spcl) == FAIL) { | |
267 | Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread); | |
268 | panic("no header after volume mark!\n"); | |
269 | } | |
270 | findinode(&spcl); | |
271 | if (spcl.c_type != TS_CLRI) | |
272 | errx(1, "Cannot find file removal list"); | |
273 | maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1; | |
274 | Dprintf(stdout, "maxino = %ld\n", (long)maxino); | |
275 | map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY)); | |
276 | if (map == NULL) | |
277 | panic("no memory for active inode map\n"); | |
278 | usedinomap = map; | |
279 | curfile.action = USING; | |
280 | getfile(xtrmap, xtrmapskip); | |
281 | if (spcl.c_type != TS_BITS) | |
282 | errx(1, "Cannot find file dump list"); | |
283 | map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY)); | |
284 | if (map == (char *)NULL) | |
285 | panic("no memory for file dump list\n"); | |
286 | dumpmap = map; | |
287 | curfile.action = USING; | |
288 | getfile(xtrmap, xtrmapskip); | |
289 | /* | |
290 | * If there may be whiteout entries on the tape, pretend that the | |
291 | * whiteout inode exists, so that the whiteout entries can be | |
292 | * extracted. | |
293 | */ | |
294 | if (oldinofmt == 0) | |
295 | SETINO(WINO, dumpmap); | |
296 | } | |
297 | ||
298 | /* | |
299 | * Prompt user to load a new dump volume. | |
300 | * "Nextvol" is the next suggested volume to use. | |
301 | * This suggested volume is enforced when doing full | |
302 | * or incremental restores, but can be overridden by | |
303 | * the user when only extracting a subset of the files. | |
304 | */ | |
305 | void | |
306 | getvol(long nextvol) | |
307 | { | |
308 | long newvol = 0, savecnt = 0, wantnext = 0, i; | |
309 | union u_spcl tmpspcl; | |
310 | # define tmpbuf tmpspcl.s_spcl | |
311 | char buf[TP_BSIZE]; | |
312 | int haderror = 0; | |
313 | ||
314 | if (nextvol == 1) { | |
315 | tapesread = 0; | |
316 | gettingfile = 0; | |
317 | } | |
318 | if (pipein) { | |
319 | if (nextvol != 1) | |
320 | panic("Changing volumes on pipe input?\n"); | |
321 | if (volno == 1) | |
322 | return; | |
323 | goto gethdr; | |
324 | } | |
325 | savecnt = blksread; | |
326 | again: | |
327 | if (pipein) | |
328 | exit(1); /* pipes do not get a second chance */ | |
329 | if (command == 'R' || command == 'r' || curfile.action != SKIP) { | |
330 | newvol = nextvol; | |
331 | wantnext = 1; | |
332 | } else { | |
333 | newvol = 0; | |
334 | wantnext = 0; | |
335 | } | |
336 | while (newvol <= 0) { | |
337 | if (tapesread == 0) { | |
338 | fprintf(stderr, "%s%s%s%s%s", | |
339 | "You have not read any tapes yet.\n", | |
340 | "Unless you know which volume your", | |
341 | " file(s) are on you should start\n", | |
342 | "with the last volume and work", | |
343 | " towards the first.\n"); | |
344 | } else { | |
345 | fprintf(stderr, "You have read volumes"); | |
346 | strcpy(buf, ": "); | |
347 | for (i = 1; i < 32; i++) | |
348 | if (tapesread & (1 << i)) { | |
349 | fprintf(stderr, "%s%ld", buf, (long)i); | |
350 | strcpy(buf, ", "); | |
351 | } | |
352 | fprintf(stderr, "\n"); | |
353 | } | |
354 | do { | |
355 | fprintf(stderr, "Specify next volume #: "); | |
356 | (void) fflush(stderr); | |
357 | (void) fgets(buf, BUFSIZ, terminal); | |
358 | } while (!feof(terminal) && buf[0] == '\n'); | |
359 | if (feof(terminal)) | |
360 | exit(1); | |
361 | newvol = atoi(buf); | |
362 | if (newvol <= 0) { | |
363 | fprintf(stderr, | |
364 | "Volume numbers are positive numerics\n"); | |
365 | } | |
366 | } | |
367 | if (newvol == volno) { | |
368 | tapesread |= 1 << volno; | |
369 | return; | |
370 | } | |
371 | closemt(); | |
372 | if (Mflag) { | |
373 | snprintf(magtape, MAXPATHLEN, "%s%03ld", magtapeprefix, newvol); | |
374 | magtape[MAXPATHLEN - 1] = '\0'; | |
375 | } | |
376 | if (!Mflag || haderror) { | |
377 | haderror = 0; | |
378 | fprintf(stderr, "Mount tape volume %ld\n", (long)newvol); | |
379 | fprintf(stderr, "Enter ``none'' if there are no more tapes\n"); | |
380 | fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape); | |
381 | (void) fflush(stderr); | |
382 | (void) fgets(buf, BUFSIZ, terminal); | |
383 | if (feof(terminal)) | |
384 | exit(1); | |
385 | if (!strcmp(buf, "none\n")) { | |
386 | terminateinput(); | |
387 | return; | |
388 | } | |
389 | if (buf[0] != '\n') { | |
390 | (void) strcpy(magtape, buf); | |
391 | magtape[strlen(magtape) - 1] = '\0'; | |
392 | } | |
393 | } | |
394 | #ifdef RRESTORE | |
395 | if (host) | |
396 | mt = rmtopen(magtape, 0); | |
397 | else | |
398 | #endif | |
399 | mt = open(magtape, O_RDONLY, 0); | |
400 | ||
401 | if (mt == -1) { | |
402 | fprintf(stderr, "Cannot open %s\n", magtape); | |
403 | volno = -1; | |
404 | haderror = 1; | |
405 | goto again; | |
406 | } | |
407 | gethdr: | |
408 | volno = newvol; | |
409 | setdumpnum(); | |
410 | FLUSHTAPEBUF(); | |
411 | if (gethead(&tmpbuf) == FAIL) { | |
412 | Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread); | |
413 | fprintf(stderr, "tape is not dump tape\n"); | |
414 | volno = 0; | |
415 | haderror = 1; | |
416 | goto again; | |
417 | } | |
418 | if (tmpbuf.c_volume != volno) { | |
419 | fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume); | |
420 | volno = 0; | |
421 | haderror = 1; | |
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 | haderror = 1; | |
436 | goto again; | |
437 | } | |
438 | tapesread |= 1 << volno; | |
439 | blksread = savecnt; | |
440 | /* | |
441 | * If continuing from the previous volume, skip over any | |
442 | * blocks read already at the end of the previous volume. | |
443 | * | |
444 | * If coming to this volume at random, skip to the beginning | |
445 | * of the next record. | |
446 | */ | |
447 | Dprintf(stdout, "read %ld recs, tape starts with %ld\n", | |
448 | tpblksread, (long)tmpbuf.c_firstrec); | |
449 | if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) { | |
450 | if (!wantnext) { | |
451 | tpblksread = tmpbuf.c_firstrec; | |
452 | for (i = tmpbuf.c_count; i > 0; i--) | |
453 | readtape(buf); | |
454 | } else if (tmpbuf.c_firstrec > 0 && | |
455 | tmpbuf.c_firstrec < tpblksread - 1) { | |
456 | /* | |
457 | * -1 since we've read the volume header | |
458 | */ | |
459 | i = tpblksread - tmpbuf.c_firstrec - 1; | |
460 | Dprintf(stderr, "Skipping %ld duplicate record%s.\n", | |
461 | (long)i, i > 1 ? "s" : ""); | |
462 | while (--i >= 0) | |
463 | readtape(buf); | |
464 | } | |
465 | } | |
466 | if (curfile.action == USING) { | |
467 | if (volno == 1) | |
468 | panic("active file into volume 1\n"); | |
469 | return; | |
470 | } | |
471 | /* | |
472 | * Skip up to the beginning of the next record | |
473 | */ | |
474 | if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) | |
475 | for (i = tmpbuf.c_count; i > 0; i--) | |
476 | readtape(buf); | |
477 | (void) gethead(&spcl); | |
478 | findinode(&spcl); | |
479 | if (gettingfile) { | |
480 | gettingfile = 0; | |
481 | siglongjmp(restart, 1); | |
482 | } | |
483 | } | |
484 | ||
485 | /* | |
486 | * Handle unexpected EOF. | |
487 | */ | |
488 | static void | |
489 | terminateinput(void) | |
490 | { | |
491 | ||
492 | if (gettingfile && curfile.action == USING) { | |
493 | printf("Warning: %s %s\n", | |
494 | "End-of-input encountered while extracting", curfile.name); | |
495 | } | |
496 | curfile.name = "<name unknown>"; | |
497 | curfile.action = UNKNOWN; | |
498 | curfile.dip = NULL; | |
499 | curfile.ino = maxino; | |
500 | if (gettingfile) { | |
501 | gettingfile = 0; | |
502 | siglongjmp(restart, 1); | |
503 | } | |
504 | } | |
505 | ||
506 | /* | |
507 | * handle multiple dumps per tape by skipping forward to the | |
508 | * appropriate one. | |
509 | */ | |
510 | static void | |
511 | setdumpnum(void) | |
512 | { | |
513 | struct mtop tcom; | |
514 | ||
515 | if (dumpnum == 1 || volno != 1) | |
516 | return; | |
517 | if (pipein) | |
518 | errx(1, "Cannot have multiple dumps on pipe input"); | |
519 | tcom.mt_op = MTFSF; | |
520 | tcom.mt_count = dumpnum - 1; | |
521 | #ifdef RRESTORE | |
522 | if (host) | |
523 | rmtioctl(MTFSF, dumpnum - 1); | |
524 | else | |
525 | #endif | |
526 | if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0) | |
527 | warn("ioctl MTFSF"); | |
528 | } | |
529 | ||
530 | void | |
531 | printdumpinfo(void) | |
532 | { | |
533 | #ifdef __linux__ | |
534 | fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date)); | |
535 | fprintf(stdout, "Dumped from: %s", | |
536 | (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate)); | |
537 | #else | |
538 | fprintf(stdout, "Dump date: %s", ctime(&spcl.c_date)); | |
539 | fprintf(stdout, "Dumped from: %s", | |
540 | (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&spcl.c_ddate)); | |
541 | #endif | |
542 | if (spcl.c_host[0] == '\0') | |
543 | return; | |
544 | fprintf(stderr, "Level %d dump of %s on %s:%s\n", | |
545 | spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev); | |
546 | fprintf(stderr, "Label: %s\n", spcl.c_label); | |
547 | } | |
548 | ||
549 | int | |
550 | extractfile(char *name) | |
551 | { | |
552 | unsigned int flags; | |
553 | mode_t mode; | |
554 | struct timeval timep[2]; | |
555 | struct entry *ep; | |
556 | ||
557 | curfile.name = name; | |
558 | curfile.action = USING; | |
559 | #ifdef __linux__ | |
560 | timep[0].tv_sec = curfile.dip->di_atime.tv_sec; | |
561 | timep[0].tv_usec = curfile.dip->di_atime.tv_usec; | |
562 | timep[1].tv_sec = curfile.dip->di_mtime.tv_sec; | |
563 | timep[1].tv_usec = curfile.dip->di_mtime.tv_usec; | |
564 | #else /* __linux__ */ | |
565 | timep[0].tv_sec = curfile.dip->di_atime; | |
566 | timep[0].tv_usec = curfile.dip->di_atimensec / 1000; | |
567 | timep[1].tv_sec = curfile.dip->di_mtime; | |
568 | timep[1].tv_usec = curfile.dip->di_mtimensec / 1000; | |
569 | #endif /* __linux__ */ | |
570 | mode = curfile.dip->di_mode; | |
571 | flags = curfile.dip->di_flags; | |
572 | switch (mode & IFMT) { | |
573 | ||
574 | default: | |
575 | fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode); | |
576 | skipfile(); | |
577 | return (FAIL); | |
578 | ||
579 | case IFSOCK: | |
580 | Vprintf(stdout, "skipped socket %s\n", name); | |
581 | skipfile(); | |
582 | return (GOOD); | |
583 | ||
584 | case IFDIR: | |
585 | if (mflag) { | |
586 | ep = lookupname(name); | |
587 | if (ep == NULL || ep->e_flags & EXTRACT) | |
588 | panic("unextracted directory %s\n", name); | |
589 | skipfile(); | |
590 | return (GOOD); | |
591 | } | |
592 | Vprintf(stdout, "extract file %s\n", name); | |
593 | return (genliteraldir(name, curfile.ino)); | |
594 | ||
595 | case IFLNK: | |
596 | { | |
597 | #ifdef HAVE_LCHOWN | |
598 | uid_t luid = curfile.dip->di_uid; | |
599 | gid_t lgid = curfile.dip->di_gid; | |
600 | #endif | |
601 | lnkbuf[0] = '\0'; | |
602 | pathlen = 0; | |
603 | getfile(xtrlnkfile, xtrlnkskip); | |
604 | if (pathlen == 0) { | |
605 | Vprintf(stdout, | |
606 | "%s: zero length symbolic link (ignored)\n", name); | |
607 | return (GOOD); | |
608 | } | |
609 | if (linkit(lnkbuf, name, SYMLINK) == FAIL) | |
610 | return (FAIL); | |
611 | #ifdef HAVE_LCHOWN | |
612 | (void) lchown(name, luid, lgid); | |
613 | #endif | |
614 | return (GOOD); | |
615 | } | |
616 | ||
617 | case IFIFO: | |
618 | Vprintf(stdout, "extract fifo %s\n", name); | |
619 | if (Nflag) { | |
620 | skipfile(); | |
621 | return (GOOD); | |
622 | } | |
623 | if (uflag && !Nflag) | |
624 | (void)unlink(name); | |
625 | if (mkfifo(name, mode) < 0) { | |
626 | warn("%s: cannot create fifo", name); | |
627 | skipfile(); | |
628 | return (FAIL); | |
629 | } | |
630 | (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid); | |
631 | (void) chmod(name, mode); | |
632 | if (flags) | |
633 | #ifdef __linux__ | |
634 | (void) fsetflags(name, flags); | |
635 | #else | |
636 | (void) chflags(name, flags); | |
637 | #endif | |
638 | skipfile(); | |
639 | utimes(name, timep); | |
640 | return (GOOD); | |
641 | ||
642 | case IFCHR: | |
643 | case IFBLK: | |
644 | Vprintf(stdout, "extract special file %s\n", name); | |
645 | if (Nflag) { | |
646 | skipfile(); | |
647 | return (GOOD); | |
648 | } | |
649 | if (uflag) | |
650 | (void)unlink(name); | |
651 | if (mknod(name, mode, (int)curfile.dip->di_rdev) < 0) { | |
652 | warn("%s: cannot create special file", name); | |
653 | skipfile(); | |
654 | return (FAIL); | |
655 | } | |
656 | (void) chown(name, curfile.dip->di_uid, curfile.dip->di_gid); | |
657 | (void) chmod(name, mode); | |
658 | if (flags) | |
659 | #ifdef __linux__ | |
660 | { | |
661 | warn("%s: fsetflags called on a special file", name); | |
662 | (void) fsetflags(name, flags); | |
663 | } | |
664 | #else | |
665 | (void) chflags(name, flags); | |
666 | #endif | |
667 | skipfile(); | |
668 | utimes(name, timep); | |
669 | return (GOOD); | |
670 | ||
671 | case IFREG: | |
672 | Vprintf(stdout, "extract file %s\n", name); | |
673 | if (Nflag) { | |
674 | skipfile(); | |
675 | return (GOOD); | |
676 | } | |
677 | if (uflag) | |
678 | (void)unlink(name); | |
679 | if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, | |
680 | 0666)) < 0) { | |
681 | warn("%s: cannot create file", name); | |
682 | skipfile(); | |
683 | return (FAIL); | |
684 | } | |
685 | (void) fchown(ofile, curfile.dip->di_uid, curfile.dip->di_gid); | |
686 | (void) fchmod(ofile, mode); | |
687 | if (flags) | |
688 | #ifdef __linux__ | |
689 | (void) setflags(ofile, flags); | |
690 | #else | |
691 | (void) fchflags(ofile, flags); | |
692 | #endif | |
693 | getfile(xtrfile, xtrskip); | |
694 | (void) close(ofile); | |
695 | utimes(name, timep); | |
696 | return (GOOD); | |
697 | } | |
698 | /* NOTREACHED */ | |
699 | } | |
700 | ||
701 | /* | |
702 | * skip over bit maps on the tape | |
703 | */ | |
704 | void | |
705 | skipmaps(void) | |
706 | { | |
707 | ||
708 | while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI) | |
709 | skipfile(); | |
710 | } | |
711 | ||
712 | /* | |
713 | * skip over a file on the tape | |
714 | */ | |
715 | void | |
716 | skipfile(void) | |
717 | { | |
718 | ||
719 | curfile.action = SKIP; | |
720 | getfile(xtrnull, xtrnull); | |
721 | } | |
722 | ||
723 | /* | |
724 | * Extract a file from the tape. | |
725 | * When an allocated block is found it is passed to the fill function; | |
726 | * when an unallocated block (hole) is found, a zeroed buffer is passed | |
727 | * to the skip function. | |
728 | */ | |
729 | void | |
730 | getfile(void (*fill) __P((char *, size_t)), void (*skip) __P((char *, size_t))) | |
731 | { | |
732 | register int i; | |
733 | volatile int curblk = 0; | |
734 | volatile quad_t size = spcl.c_dinode.di_size; | |
735 | volatile int last_write_was_hole = 0; | |
736 | quad_t origsize = size; | |
737 | static char clearedbuf[MAXBSIZE]; | |
738 | char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE]; | |
739 | char junk[TP_BSIZE]; | |
740 | ||
741 | if (spcl.c_type == TS_END) | |
742 | panic("ran off end of tape\n"); | |
743 | if (spcl.c_magic != NFS_MAGIC) | |
744 | panic("not at beginning of a file\n"); | |
745 | if (!gettingfile && setjmp(restart) != 0) | |
746 | return; | |
747 | gettingfile++; | |
748 | loop: | |
749 | for (i = 0; i < spcl.c_count; i++) { | |
750 | if (readmapflag || spcl.c_addr[i]) { | |
751 | readtape(&buf[curblk++][0]); | |
752 | if (curblk == fssize / TP_BSIZE) { | |
753 | (*fill)((char *)buf, (size_t)(size > TP_BSIZE ? | |
754 | fssize : (curblk - 1) * TP_BSIZE + size)); | |
755 | curblk = 0; | |
756 | last_write_was_hole = 0; | |
757 | } | |
758 | } else { | |
759 | if (curblk > 0) { | |
760 | (*fill)((char *)buf, (size_t)(size > TP_BSIZE ? | |
761 | curblk * TP_BSIZE : | |
762 | (curblk - 1) * TP_BSIZE + size)); | |
763 | curblk = 0; | |
764 | } | |
765 | (*skip)(clearedbuf, (long)(size > TP_BSIZE ? | |
766 | TP_BSIZE : size)); | |
767 | last_write_was_hole = 1; | |
768 | } | |
769 | if ((size -= TP_BSIZE) <= 0) { | |
770 | for (i++; i < spcl.c_count; i++) | |
771 | if (readmapflag || spcl.c_addr[i]) | |
772 | readtape(junk); | |
773 | break; | |
774 | } | |
775 | } | |
776 | if (gethead(&spcl) == GOOD && size > 0) { | |
777 | if (spcl.c_type == TS_ADDR) | |
778 | goto loop; | |
779 | Dprintf(stdout, | |
780 | "Missing address (header) block for %s at %ld blocks\n", | |
781 | curfile.name, (long)blksread); | |
782 | } | |
783 | if (curblk > 0) { | |
784 | (*fill)((char *)buf, (size_t)(curblk * TP_BSIZE) + size); | |
785 | last_write_was_hole = 0; | |
786 | } | |
787 | if (last_write_was_hole) { | |
788 | ftruncate(ofile, origsize); | |
789 | } | |
790 | findinode(&spcl); | |
791 | gettingfile = 0; | |
792 | } | |
793 | ||
794 | /* | |
795 | * Write out the next block of a file. | |
796 | */ | |
797 | static void | |
798 | xtrfile(char *buf, size_t size) | |
799 | { | |
800 | ||
801 | if (Nflag) | |
802 | return; | |
803 | if (write(ofile, buf, (int) size) == -1) | |
804 | err(1, "write error extracting inode %lu, name %s\nwrite", | |
805 | (unsigned long)curfile.ino, curfile.name); | |
806 | } | |
807 | ||
808 | /* | |
809 | * Skip over a hole in a file. | |
810 | */ | |
811 | /* ARGSUSED */ | |
812 | static void | |
813 | xtrskip(char *buf, size_t size) | |
814 | { | |
815 | ||
816 | if (lseek(ofile, (off_t)size, SEEK_CUR) == -1) | |
817 | err(1, "seek error extracting inode %lu, name %s\nlseek", | |
818 | (unsigned long)curfile.ino, curfile.name); | |
819 | } | |
820 | ||
821 | /* | |
822 | * Collect the next block of a symbolic link. | |
823 | */ | |
824 | static void | |
825 | xtrlnkfile(char *buf, size_t size) | |
826 | { | |
827 | ||
828 | pathlen += size; | |
829 | if (pathlen > MAXPATHLEN) | |
830 | errx(1, "symbolic link name: %s->%s%s; too long %d", | |
831 | curfile.name, lnkbuf, buf, pathlen); | |
832 | (void) strcat(lnkbuf, buf); | |
833 | } | |
834 | ||
835 | /* | |
836 | * Skip over a hole in a symbolic link (should never happen). | |
837 | */ | |
838 | /* ARGSUSED */ | |
839 | static void | |
840 | xtrlnkskip(char *buf, size_t size) | |
841 | { | |
842 | ||
843 | errx(1, "unallocated block in symbolic link %s", curfile.name); | |
844 | } | |
845 | ||
846 | /* | |
847 | * Collect the next block of a bit map. | |
848 | */ | |
849 | static void | |
850 | xtrmap(char *buf, size_t size) | |
851 | { | |
852 | ||
853 | memmove(map, buf, size); | |
854 | map += size; | |
855 | } | |
856 | ||
857 | /* | |
858 | * Skip over a hole in a bit map (should never happen). | |
859 | */ | |
860 | /* ARGSUSED */ | |
861 | static void | |
862 | xtrmapskip(char *buf, size_t size) | |
863 | { | |
864 | ||
865 | panic("hole in map\n"); | |
866 | map += size; | |
867 | } | |
868 | ||
869 | /* | |
870 | * Noop, when an extraction function is not needed. | |
871 | */ | |
872 | /* ARGSUSED */ | |
873 | void | |
874 | xtrnull(char *buf, size_t size) | |
875 | { | |
876 | ||
877 | return; | |
878 | } | |
879 | ||
880 | static int | |
881 | do_cmpfiles(int fd_tape, int fd_disk, long size) | |
882 | { | |
883 | static char buf_tape[BUFSIZ]; | |
884 | static char buf_disk[BUFSIZ]; | |
885 | ssize_t n_tape; | |
886 | ssize_t n_disk; | |
887 | ||
888 | while (size > 0) { | |
889 | if ((n_tape = read(fd_tape, buf_tape, sizeof(buf_tape))) < 1) { | |
890 | close(fd_tape), close(fd_disk); | |
891 | panic("do_cmpfiles: unexpected EOF[1]"); | |
892 | } | |
893 | if ((n_disk = read(fd_disk, buf_disk, sizeof(buf_tape))) < 1) { | |
894 | close(fd_tape), close(fd_disk); | |
895 | panic("do_cmpfiles: unexpected EOF[2]"); | |
896 | } | |
897 | if (n_tape != n_disk) { | |
898 | close(fd_tape), close(fd_disk); | |
899 | panic("do_cmpfiles: sizes different!"); | |
900 | } | |
901 | if (memcmp(buf_tape, buf_disk, (size_t)n_tape) != 0) return (1); | |
902 | size -= n_tape; | |
903 | } | |
904 | return (0); | |
905 | } | |
906 | ||
907 | /* for debugging compare problems */ | |
908 | #undef COMPARE_FAIL_KEEP_FILE | |
909 | ||
910 | static | |
911 | #ifdef COMPARE_FAIL_KEEP_FILE | |
912 | /* return true if tapefile should be unlinked after compare */ | |
913 | int | |
914 | #else | |
915 | void | |
916 | #endif | |
917 | cmpfiles(char *tapefile, char *diskfile, struct stat *sbuf_disk) | |
918 | { | |
919 | struct stat sbuf_tape; | |
920 | int fd_tape, fd_disk; | |
921 | ||
922 | if (stat(tapefile, &sbuf_tape) != 0) { | |
923 | panic("Can't lstat tmp file %s: %s\n", tapefile, | |
924 | strerror(errno)); | |
925 | } | |
926 | ||
927 | if (sbuf_disk->st_size != sbuf_tape.st_size) { | |
928 | fprintf(stderr, | |
929 | "%s: size changed from %ld to %ld.\n", | |
930 | diskfile, (long)sbuf_tape.st_size, (long)sbuf_disk->st_size); | |
931 | #ifdef COMPARE_FAIL_KEEP_FILE | |
932 | return (0); | |
933 | #else | |
934 | return; | |
935 | #endif | |
936 | } | |
937 | ||
938 | if ((fd_tape = open(tapefile, O_RDONLY)) < 0) { | |
939 | panic("Can't open %s: %s\n", tapefile, strerror(errno)); | |
940 | } | |
941 | if ((fd_disk = open(diskfile, O_RDONLY)) < 0) { | |
942 | close(fd_tape); | |
943 | panic("Can't open %s: %s\n", diskfile, strerror(errno)); | |
944 | } | |
945 | ||
946 | if (do_cmpfiles(fd_tape, fd_disk, sbuf_tape.st_size)) { | |
947 | fprintf(stderr, "%s: tape and disk copies are different\n", | |
948 | diskfile); | |
949 | close(fd_tape); | |
950 | close(fd_disk); | |
951 | #ifdef COMPARE_FAIL_KEEP_FILE | |
952 | /* rename the file to live in /tmp */ | |
953 | /* rename `tapefile' to /tmp/<basename of diskfile> */ | |
954 | { | |
955 | char *p = strrchr(diskfile, '/'); | |
956 | char newname[MAXPATHLEN]; | |
957 | if (!p) { | |
958 | panic("can't find / in %s\n", diskfile); | |
959 | } | |
960 | snprintf(newname, sizeof(newname), "%s/debug/%s", tmpdir, p + 1); | |
961 | if (rename(tapefile, newname)) { | |
962 | panic("rename from %s to %s failed: %s\n", | |
963 | tapefile, newname, | |
964 | strerror(errno)); | |
965 | } else { | |
966 | fprintf(stderr, "*** %s saved to %s\n", | |
967 | tapefile, newname); | |
968 | } | |
969 | } | |
970 | ||
971 | /* don't unlink the file (it's not there anymore */ | |
972 | /* anyway) */ | |
973 | return (0); | |
974 | #else | |
975 | return; | |
976 | #endif | |
977 | } | |
978 | close(fd_tape); | |
979 | close(fd_disk); | |
980 | #ifdef COMPARE_FAIL_KEEP_FILE | |
981 | return (1); | |
982 | #endif | |
983 | } | |
984 | ||
985 | static char tmpfilename[MAXPATHLEN]; | |
986 | ||
987 | void | |
988 | comparefile(char *name) | |
989 | { | |
990 | static char *tmpfile = NULL; | |
991 | int mode; | |
992 | struct stat sb, stemp; | |
993 | int r; | |
994 | ||
995 | if ((r = lstat(name, &sb)) != 0) { | |
996 | warn("%s: does not exist (%d)", name, r); | |
997 | skipfile(); | |
998 | return; | |
999 | } | |
1000 | ||
1001 | curfile.name = name; | |
1002 | curfile.action = USING; | |
1003 | mode = curfile.dip->di_mode; | |
1004 | ||
1005 | Vprintf(stdout, "comparing %s (size: %ld, mode: 0%o)\n", name, | |
1006 | (long)sb.st_size, mode); | |
1007 | ||
1008 | if (sb.st_mode != mode) { | |
1009 | fprintf(stderr, "%s: mode changed from 0%o to 0%o.\n", | |
1010 | name, mode & 07777, sb.st_mode & 07777); | |
1011 | } | |
1012 | switch (mode & IFMT) { | |
1013 | default: | |
1014 | skipfile(); | |
1015 | return; | |
1016 | ||
1017 | case IFSOCK: | |
1018 | skipfile(); | |
1019 | return; | |
1020 | ||
1021 | case IFDIR: | |
1022 | skipfile(); | |
1023 | return; | |
1024 | ||
1025 | case IFLNK: { | |
1026 | char lbuf[MAXPATHLEN + 1]; | |
1027 | int lsize; | |
1028 | ||
1029 | if (!(sb.st_mode & S_IFLNK)) { | |
1030 | fprintf(stderr, "%s: is no longer a symbolic link\n", | |
1031 | name); | |
1032 | return; | |
1033 | } | |
1034 | lnkbuf[0] = '\0'; | |
1035 | pathlen = 0; | |
1036 | getfile(xtrlnkfile, xtrlnkskip); | |
1037 | if (pathlen == 0) { | |
1038 | fprintf(stderr, | |
1039 | "%s: zero length symbolic link (ignored)\n", | |
1040 | name); | |
1041 | return; | |
1042 | } | |
1043 | if ((lsize = readlink(name, lbuf, MAXPATHLEN)) < 0) { | |
1044 | panic("readlink of %s failed: %s", name, | |
1045 | strerror(errno)); | |
1046 | } | |
1047 | lbuf[lsize] = 0; | |
1048 | if (strcmp(lbuf, lnkbuf) != 0) { | |
1049 | fprintf(stderr, | |
1050 | "%s: symbolic link changed from %s to %s.\n", | |
1051 | name, lnkbuf, lbuf); | |
1052 | return; | |
1053 | } | |
1054 | return; | |
1055 | } | |
1056 | ||
1057 | case IFCHR: | |
1058 | case IFBLK: | |
1059 | if (!(sb.st_mode & (S_IFCHR|S_IFBLK))) { | |
1060 | fprintf(stderr, "%s: no longer a special file\n", | |
1061 | name); | |
1062 | skipfile(); | |
1063 | return; | |
1064 | } | |
1065 | ||
1066 | if (sb.st_rdev != (int)curfile.dip->di_rdev) { | |
1067 | fprintf(stderr, | |
1068 | "%s: device changed from %d,%d to %d,%d.\n", | |
1069 | name, | |
1070 | ((int)curfile.dip->di_rdev >> 8) & 0xff, | |
1071 | (int)curfile.dip->di_rdev & 0xff, | |
1072 | ((int)sb.st_rdev >> 8) & 0xff, | |
1073 | (int)sb.st_rdev & 0xff); | |
1074 | } | |
1075 | skipfile(); | |
1076 | return; | |
1077 | ||
1078 | case IFREG: | |
1079 | if (tmpfile == NULL) { | |
1080 | /* argument to mktemp() must not be in RO space: */ | |
1081 | snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir); | |
1082 | tmpfile = mktemp(&tmpfilename[0]); | |
1083 | } | |
1084 | if ((stat(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) { | |
1085 | panic("cannot delete tmp file %s: %s\n", | |
1086 | tmpfile, strerror(errno)); | |
1087 | } | |
1088 | if ((ofile = creat(tmpfile, 0600)) < 0) { | |
1089 | panic("cannot create file temp file %s: %s\n", | |
1090 | name, strerror(errno)); | |
1091 | } | |
1092 | getfile(xtrfile, xtrskip); | |
1093 | (void) close(ofile); | |
1094 | #ifdef COMPARE_FAIL_KEEP_FILE | |
1095 | if (cmpfiles(tmpfile, name, &sb)) | |
1096 | unlink(tmpfile); | |
1097 | #else | |
1098 | cmpfiles(tmpfile, name, &sb); | |
1099 | unlink(tmpfile); | |
1100 | #endif | |
1101 | return; | |
1102 | } | |
1103 | /* NOTREACHED */ | |
1104 | } | |
1105 | ||
1106 | /* | |
1107 | * Read TP_BSIZE blocks from the input. | |
1108 | * Handle read errors, and end of media. | |
1109 | */ | |
1110 | static void | |
1111 | readtape(char *buf) | |
1112 | { | |
1113 | ssize_t rd, newvol, i; | |
1114 | int cnt, seek_failed; | |
1115 | ||
1116 | if (blkcnt < numtrec) { | |
1117 | memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], TP_BSIZE); | |
1118 | blksread++; | |
1119 | tpblksread++; | |
1120 | return; | |
1121 | } | |
1122 | for (i = 0; i < ntrec; i++) | |
1123 | ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; | |
1124 | if (numtrec == 0) | |
1125 | numtrec = ntrec; | |
1126 | cnt = ntrec * TP_BSIZE; | |
1127 | rd = 0; | |
1128 | getmore: | |
1129 | #ifdef RRESTORE | |
1130 | if (host) | |
1131 | i = rmtread(&tapebuf[rd], cnt); | |
1132 | else | |
1133 | #endif | |
1134 | i = read(mt, &tapebuf[rd], cnt); | |
1135 | /* | |
1136 | * Check for mid-tape short read error. | |
1137 | * If found, skip rest of buffer and start with the next. | |
1138 | */ | |
1139 | if (!pipein && numtrec < ntrec && i > 0) { | |
1140 | Dprintf(stdout, "mid-media short read error.\n"); | |
1141 | numtrec = ntrec; | |
1142 | } | |
1143 | /* | |
1144 | * Handle partial block read. | |
1145 | */ | |
1146 | if (pipein && i == 0 && rd > 0) | |
1147 | i = rd; | |
1148 | else if (i > 0 && i != ntrec * TP_BSIZE) { | |
1149 | if (pipein) { | |
1150 | rd += i; | |
1151 | cnt -= i; | |
1152 | if (cnt > 0) | |
1153 | goto getmore; | |
1154 | i = rd; | |
1155 | } else { | |
1156 | /* | |
1157 | * Short read. Process the blocks read. | |
1158 | */ | |
1159 | if (i % TP_BSIZE != 0) | |
1160 | Vprintf(stdout, | |
1161 | "partial block read: %ld should be %ld\n", | |
1162 | (long)i, ntrec * TP_BSIZE); | |
1163 | numtrec = i / TP_BSIZE; | |
1164 | } | |
1165 | } | |
1166 | /* | |
1167 | * Handle read error. | |
1168 | */ | |
1169 | if (i < 0) { | |
1170 | fprintf(stderr, "Tape read error while "); | |
1171 | switch (curfile.action) { | |
1172 | default: | |
1173 | fprintf(stderr, "trying to set up tape\n"); | |
1174 | break; | |
1175 | case UNKNOWN: | |
1176 | fprintf(stderr, "trying to resynchronize\n"); | |
1177 | break; | |
1178 | case USING: | |
1179 | fprintf(stderr, "restoring %s\n", curfile.name); | |
1180 | break; | |
1181 | case SKIP: | |
1182 | fprintf(stderr, "skipping over inode %lu\n", | |
1183 | (unsigned long)curfile.ino); | |
1184 | break; | |
1185 | } | |
1186 | if (!yflag && !reply("continue")) | |
1187 | exit(1); | |
1188 | i = ntrec * TP_BSIZE; | |
1189 | memset(tapebuf, 0, (size_t)i); | |
1190 | #ifdef RRESTORE | |
1191 | if (host) | |
1192 | seek_failed = (rmtseek(i, 1) < 0); | |
1193 | else | |
1194 | #endif | |
1195 | seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1); | |
1196 | ||
1197 | if (seek_failed) | |
1198 | err(1, "continuation failed"); | |
1199 | } | |
1200 | /* | |
1201 | * Handle end of tape. | |
1202 | */ | |
1203 | if (i == 0) { | |
1204 | Vprintf(stdout, "End-of-tape encountered\n"); | |
1205 | if (!pipein) { | |
1206 | newvol = volno + 1; | |
1207 | volno = 0; | |
1208 | numtrec = 0; | |
1209 | getvol(newvol); | |
1210 | readtape(buf); | |
1211 | return; | |
1212 | } | |
1213 | if (rd % TP_BSIZE != 0) | |
1214 | panic("partial block read: %d should be %d\n", | |
1215 | rd, ntrec * TP_BSIZE); | |
1216 | terminateinput(); | |
1217 | memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE); | |
1218 | } | |
1219 | blkcnt = 0; | |
1220 | memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], TP_BSIZE); | |
1221 | blksread++; | |
1222 | tpblksread++; | |
1223 | } | |
1224 | ||
1225 | static void | |
1226 | findtapeblksize(void) | |
1227 | { | |
1228 | register long i; | |
1229 | ||
1230 | for (i = 0; i < ntrec; i++) | |
1231 | ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; | |
1232 | blkcnt = 0; | |
1233 | #ifdef RRESTORE | |
1234 | if (host) | |
1235 | i = rmtread(tapebuf, (size_t)(ntrec * TP_BSIZE)); | |
1236 | else | |
1237 | #endif | |
1238 | i = read(mt, tapebuf, (size_t)(ntrec * TP_BSIZE)); | |
1239 | ||
1240 | if (i <= 0) | |
1241 | err(1, "tape read error"); | |
1242 | if (i % TP_BSIZE != 0) | |
1243 | errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)", | |
1244 | (long)i, TP_BSIZE); | |
1245 | ntrec = i / TP_BSIZE; | |
1246 | numtrec = ntrec; | |
1247 | Vprintf(stdout, "Tape block size is %ld\n", ntrec); | |
1248 | } | |
1249 | ||
1250 | void | |
1251 | closemt(void) | |
1252 | { | |
1253 | ||
1254 | if (mt < 0) | |
1255 | return; | |
1256 | #ifdef RRESTORE | |
1257 | if (host) | |
1258 | rmtclose(); | |
1259 | else | |
1260 | #endif | |
1261 | (void) close(mt); | |
1262 | } | |
1263 | ||
1264 | /* | |
1265 | * Read the next block from the tape. | |
1266 | * Check to see if it is one of several vintage headers. | |
1267 | * If it is an old style header, convert it to a new style header. | |
1268 | * If it is not any valid header, return an error. | |
1269 | */ | |
1270 | static int | |
1271 | gethead(struct s_spcl *buf) | |
1272 | { | |
1273 | int32_t i; | |
1274 | union { | |
1275 | quad_t qval; | |
1276 | int32_t val[2]; | |
1277 | } qcvt; | |
1278 | union u_ospcl { | |
1279 | char dummy[TP_BSIZE]; | |
1280 | struct s_ospcl { | |
1281 | int32_t c_type; | |
1282 | int32_t c_date; | |
1283 | int32_t c_ddate; | |
1284 | int32_t c_volume; | |
1285 | int32_t c_tapea; | |
1286 | u_int16_t c_inumber; | |
1287 | int32_t c_magic; | |
1288 | int32_t c_checksum; | |
1289 | struct odinode { | |
1290 | u_int16_t odi_mode; | |
1291 | u_int16_t odi_nlink; | |
1292 | u_int16_t odi_uid; | |
1293 | u_int16_t odi_gid; | |
1294 | int32_t odi_size; | |
1295 | int32_t odi_rdev; | |
1296 | char odi_addr[36]; | |
1297 | int32_t odi_atime; | |
1298 | int32_t odi_mtime; | |
1299 | int32_t odi_ctime; | |
1300 | } c_dinode; | |
1301 | int32_t c_count; | |
1302 | char c_addr[256]; | |
1303 | } s_ospcl; | |
1304 | } u_ospcl; | |
1305 | ||
1306 | if (!cvtflag) { | |
1307 | readtape((char *)buf); | |
1308 | if (buf->c_magic != NFS_MAGIC) { | |
1309 | if (swabi(buf->c_magic) != NFS_MAGIC) | |
1310 | return (FAIL); | |
1311 | if (!Bcvt) { | |
1312 | Vprintf(stdout, "Note: Doing Byte swapping\n"); | |
1313 | Bcvt = 1; | |
1314 | } | |
1315 | } | |
1316 | if (checksum((int *)buf) == FAIL) | |
1317 | return (FAIL); | |
1318 | if (Bcvt) | |
1319 | swabst((u_char *)"8i4s31i528bi192b2i", (u_char *)buf); | |
1320 | goto good; | |
1321 | } | |
1322 | readtape((char *)(&u_ospcl.s_ospcl)); | |
1323 | memset((char *)buf, 0, (long)TP_BSIZE); | |
1324 | buf->c_type = u_ospcl.s_ospcl.c_type; | |
1325 | buf->c_date = u_ospcl.s_ospcl.c_date; | |
1326 | buf->c_ddate = u_ospcl.s_ospcl.c_ddate; | |
1327 | buf->c_volume = u_ospcl.s_ospcl.c_volume; | |
1328 | buf->c_tapea = u_ospcl.s_ospcl.c_tapea; | |
1329 | buf->c_inumber = u_ospcl.s_ospcl.c_inumber; | |
1330 | buf->c_checksum = u_ospcl.s_ospcl.c_checksum; | |
1331 | buf->c_magic = u_ospcl.s_ospcl.c_magic; | |
1332 | buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode; | |
1333 | buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink; | |
1334 | buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid; | |
1335 | buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid; | |
1336 | buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size; | |
1337 | buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev; | |
1338 | #ifdef __linux__ | |
1339 | buf->c_dinode.di_atime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_atime; | |
1340 | buf->c_dinode.di_mtime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_mtime; | |
1341 | buf->c_dinode.di_ctime.tv_sec = u_ospcl.s_ospcl.c_dinode.odi_ctime; | |
1342 | #else /* __linux__ */ | |
1343 | buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime; | |
1344 | buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime; | |
1345 | buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime; | |
1346 | #endif /* __linux__ */ | |
1347 | buf->c_count = u_ospcl.s_ospcl.c_count; | |
1348 | memmove(buf->c_addr, u_ospcl.s_ospcl.c_addr, (long)256); | |
1349 | if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC || | |
1350 | checksum((int *)(&u_ospcl.s_ospcl)) == FAIL) | |
1351 | return(FAIL); | |
1352 | buf->c_magic = NFS_MAGIC; | |
1353 | ||
1354 | good: | |
1355 | if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) && | |
1356 | (buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) { | |
1357 | qcvt.qval = buf->c_dinode.di_size; | |
1358 | if (qcvt.val[0] || qcvt.val[1]) { | |
1359 | printf("Note: Doing Quad swapping\n"); | |
1360 | Qcvt = 1; | |
1361 | } | |
1362 | } | |
1363 | if (Qcvt) { | |
1364 | qcvt.qval = buf->c_dinode.di_size; | |
1365 | i = qcvt.val[1]; | |
1366 | qcvt.val[1] = qcvt.val[0]; | |
1367 | qcvt.val[0] = i; | |
1368 | buf->c_dinode.di_size = qcvt.qval; | |
1369 | } | |
1370 | readmapflag = 0; | |
1371 | ||
1372 | switch (buf->c_type) { | |
1373 | ||
1374 | case TS_CLRI: | |
1375 | case TS_BITS: | |
1376 | /* | |
1377 | * Have to patch up missing information in bit map headers | |
1378 | */ | |
1379 | buf->c_inumber = 0; | |
1380 | buf->c_dinode.di_size = buf->c_count * TP_BSIZE; | |
1381 | if (buf->c_count > TP_NINDIR) | |
1382 | readmapflag = 1; | |
1383 | else | |
1384 | for (i = 0; i < buf->c_count; i++) | |
1385 | buf->c_addr[i]++; | |
1386 | break; | |
1387 | ||
1388 | case TS_TAPE: | |
1389 | if ((buf->c_flags & DR_NEWINODEFMT) == 0) | |
1390 | oldinofmt = 1; | |
1391 | /* fall through */ | |
1392 | case TS_END: | |
1393 | buf->c_inumber = 0; | |
1394 | break; | |
1395 | ||
1396 | case TS_INODE: | |
1397 | case TS_ADDR: | |
1398 | break; | |
1399 | ||
1400 | default: | |
1401 | panic("gethead: unknown inode type %d\n", buf->c_type); | |
1402 | break; | |
1403 | } | |
1404 | /* | |
1405 | * If we are restoring a filesystem with old format inodes, | |
1406 | * copy the uid/gid to the new location. | |
1407 | */ | |
1408 | if (oldinofmt) { | |
1409 | buf->c_dinode.di_uid = buf->c_dinode.di_ouid; | |
1410 | buf->c_dinode.di_gid = buf->c_dinode.di_ogid; | |
1411 | } | |
1412 | if (dflag) | |
1413 | accthdr(buf); | |
1414 | return(GOOD); | |
1415 | } | |
1416 | ||
1417 | /* | |
1418 | * Check that a header is where it belongs and predict the next header | |
1419 | */ | |
1420 | static void | |
1421 | accthdr(struct s_spcl *header) | |
1422 | { | |
1423 | static ino_t previno = 0x7fffffff; | |
1424 | static int prevtype; | |
1425 | static long predict; | |
1426 | long blks, i; | |
1427 | ||
1428 | if (header->c_type == TS_TAPE) { | |
1429 | fprintf(stderr, "Volume header (%s inode format) ", | |
1430 | oldinofmt ? "old" : "new"); | |
1431 | if (header->c_firstrec) | |
1432 | fprintf(stderr, "begins with record %d", | |
1433 | header->c_firstrec); | |
1434 | fprintf(stderr, "\n"); | |
1435 | previno = 0x7fffffff; | |
1436 | return; | |
1437 | } | |
1438 | if (previno == 0x7fffffff) | |
1439 | goto newcalc; | |
1440 | switch (prevtype) { | |
1441 | case TS_BITS: | |
1442 | fprintf(stderr, "Dumped inodes map header"); | |
1443 | break; | |
1444 | case TS_CLRI: | |
1445 | fprintf(stderr, "Used inodes map header"); | |
1446 | break; | |
1447 | case TS_INODE: | |
1448 | fprintf(stderr, "File header, ino %lu", (unsigned long)previno); | |
1449 | break; | |
1450 | case TS_ADDR: | |
1451 | fprintf(stderr, "File continuation header, ino %ld", (long)previno); | |
1452 | break; | |
1453 | case TS_END: | |
1454 | fprintf(stderr, "End of tape header"); | |
1455 | break; | |
1456 | } | |
1457 | if (predict != blksread - 1) | |
1458 | fprintf(stderr, "; predicted %ld blocks, got %ld blocks", | |
1459 | predict, blksread - 1); | |
1460 | fprintf(stderr, "\n"); | |
1461 | newcalc: | |
1462 | blks = 0; | |
1463 | if (header->c_type != TS_END) | |
1464 | for (i = 0; i < header->c_count; i++) | |
1465 | if (readmapflag || header->c_addr[i] != 0) | |
1466 | blks++; | |
1467 | predict = blks; | |
1468 | blksread = 0; | |
1469 | prevtype = header->c_type; | |
1470 | previno = header->c_inumber; | |
1471 | } | |
1472 | ||
1473 | /* | |
1474 | * Find an inode header. | |
1475 | * Complain if had to skip, and complain is set. | |
1476 | */ | |
1477 | static void | |
1478 | findinode(struct s_spcl *header) | |
1479 | { | |
1480 | static long skipcnt = 0; | |
1481 | long i; | |
1482 | char buf[TP_BSIZE]; | |
1483 | ||
1484 | curfile.name = "<name unknown>"; | |
1485 | curfile.action = UNKNOWN; | |
1486 | curfile.dip = NULL; | |
1487 | curfile.ino = 0; | |
1488 | do { | |
1489 | if (header->c_magic != NFS_MAGIC) { | |
1490 | skipcnt++; | |
1491 | while (gethead(header) == FAIL || | |
1492 | header->c_date != dumpdate) | |
1493 | skipcnt++; | |
1494 | } | |
1495 | switch (header->c_type) { | |
1496 | ||
1497 | case TS_ADDR: | |
1498 | /* | |
1499 | * Skip up to the beginning of the next record | |
1500 | */ | |
1501 | for (i = 0; i < header->c_count; i++) | |
1502 | if (header->c_addr[i]) | |
1503 | readtape(buf); | |
1504 | while (gethead(header) == FAIL || | |
1505 | header->c_date != dumpdate) | |
1506 | skipcnt++; | |
1507 | break; | |
1508 | ||
1509 | case TS_INODE: | |
1510 | curfile.dip = &header->c_dinode; | |
1511 | curfile.ino = header->c_inumber; | |
1512 | break; | |
1513 | ||
1514 | case TS_END: | |
1515 | curfile.ino = maxino; | |
1516 | break; | |
1517 | ||
1518 | case TS_CLRI: | |
1519 | curfile.name = "<file removal list>"; | |
1520 | break; | |
1521 | ||
1522 | case TS_BITS: | |
1523 | curfile.name = "<file dump list>"; | |
1524 | break; | |
1525 | ||
1526 | case TS_TAPE: | |
1527 | panic("unexpected tape header\n"); | |
1528 | /* NOTREACHED */ | |
1529 | ||
1530 | default: | |
1531 | panic("unknown tape header type %d\n", spcl.c_type); | |
1532 | /* NOTREACHED */ | |
1533 | ||
1534 | } | |
1535 | } while (header->c_type == TS_ADDR); | |
1536 | if (skipcnt > 0) | |
1537 | fprintf(stderr, "resync restore, skipped %ld blocks\n", | |
1538 | skipcnt); | |
1539 | skipcnt = 0; | |
1540 | } | |
1541 | ||
1542 | static int | |
1543 | checksum(int *buf) | |
1544 | { | |
1545 | register int i, j; | |
1546 | ||
1547 | j = sizeof(union u_spcl) / sizeof(int); | |
1548 | i = 0; | |
1549 | if(!Bcvt) { | |
1550 | do | |
1551 | i += *buf++; | |
1552 | while (--j); | |
1553 | } else { | |
1554 | /* What happens if we want to read restore tapes | |
1555 | for a 16bit int machine??? */ | |
1556 | do | |
1557 | i += swabi(*buf++); | |
1558 | while (--j); | |
1559 | } | |
1560 | ||
1561 | if (i != CHECKSUM) { | |
1562 | fprintf(stderr, "Checksum error %o, inode %lu file %s\n", i, | |
1563 | (unsigned long)curfile.ino, curfile.name); | |
1564 | return(FAIL); | |
1565 | } | |
1566 | return(GOOD); | |
1567 | } | |
1568 | ||
1569 | #ifdef RRESTORE | |
1570 | #ifdef __STDC__ | |
1571 | #include <stdarg.h> | |
1572 | #else | |
1573 | #include <varargs.h> | |
1574 | #endif | |
1575 | ||
1576 | void | |
1577 | #ifdef __STDC__ | |
1578 | msg(const char *fmt, ...) | |
1579 | #else | |
1580 | msg(fmt, va_alist) | |
1581 | char *fmt; | |
1582 | va_dcl | |
1583 | #endif | |
1584 | { | |
1585 | va_list ap; | |
1586 | #ifdef __STDC__ | |
1587 | va_start(ap, fmt); | |
1588 | #else | |
1589 | va_start(ap); | |
1590 | #endif | |
1591 | (void)vfprintf(stderr, fmt, ap); | |
1592 | va_end(ap); | |
1593 | } | |
1594 | #endif /* RRESTORE */ | |
1595 | ||
1596 | static u_char * | |
1597 | swab16(u_char *sp, int n) | |
1598 | { | |
1599 | char c; | |
1600 | ||
1601 | while (--n >= 0) { | |
1602 | c = sp[0]; sp[0] = sp[1]; sp[1] = c; | |
1603 | sp += 2; | |
1604 | } | |
1605 | return (sp); | |
1606 | } | |
1607 | ||
1608 | static u_char * | |
1609 | swab32(u_char *sp, int n) | |
1610 | { | |
1611 | char c; | |
1612 | ||
1613 | while (--n >= 0) { | |
1614 | c = sp[0]; sp[0] = sp[3]; sp[3] = c; | |
1615 | c = sp[1]; sp[1] = sp[2]; sp[2] = c; | |
1616 | sp += 4; | |
1617 | } | |
1618 | return (sp); | |
1619 | } | |
1620 | ||
1621 | static u_char * | |
1622 | swab64(u_char *sp, int n) | |
1623 | { | |
1624 | char c; | |
1625 | ||
1626 | while (--n >= 0) { | |
1627 | c = sp[0]; sp[0] = sp[7]; sp[7] = c; | |
1628 | c = sp[1]; sp[1] = sp[6]; sp[6] = c; | |
1629 | c = sp[2]; sp[2] = sp[5]; sp[5] = c; | |
1630 | c = sp[3]; sp[3] = sp[4]; sp[4] = c; | |
1631 | sp += 8; | |
1632 | } | |
1633 | return (sp); | |
1634 | } | |
1635 | ||
1636 | void | |
1637 | swabst(u_char *cp, u_char *sp) | |
1638 | { | |
1639 | int n = 0; | |
1640 | ||
1641 | while (*cp) { | |
1642 | switch (*cp) { | |
1643 | case '0': case '1': case '2': case '3': case '4': | |
1644 | case '5': case '6': case '7': case '8': case '9': | |
1645 | n = (n * 10) + (*cp++ - '0'); | |
1646 | continue; | |
1647 | ||
1648 | case 's': case 'w': case 'h': | |
1649 | if (n == 0) | |
1650 | n = 1; | |
1651 | sp = swab16(sp, n); | |
1652 | break; | |
1653 | ||
1654 | case 'i': | |
1655 | if (n == 0) | |
1656 | n = 1; | |
1657 | sp = swab32(sp, n); | |
1658 | break; | |
1659 | ||
1660 | case 'l': | |
1661 | if (n == 0) | |
1662 | n = 1; | |
1663 | sp = swab64(sp, n); | |
1664 | break; | |
1665 | ||
1666 | default: /* Any other character, like 'b' counts as byte. */ | |
1667 | if (n == 0) | |
1668 | n = 1; | |
1669 | sp += n; | |
1670 | break; | |
1671 | } | |
1672 | cp++; | |
1673 | n = 0; | |
1674 | } | |
1675 | } | |
1676 | ||
1677 | static u_int | |
1678 | swabi(u_int x) | |
1679 | { | |
1680 | swabst((u_char *)"i", (u_char *)&x); | |
1681 | return (x); | |
1682 | } | |
1683 | ||
1684 | static u_long | |
1685 | swabl(u_long x) | |
1686 | { | |
1687 | swabst((u_char *)"l", (u_char *)&x); | |
1688 | return (x); | |
1689 | } |