Commit | Line | Data |
---|---|---|
8374beb1 BJ |
1 | #define MAXINO 3000 |
2 | #define BITS 8 | |
3 | #define MAXXTR 60 | |
4 | #define NCACHE 3 | |
5 | ||
6 | #ifndef STANDALONE | |
7 | #include <stdio.h> | |
8 | #include <signal.h> | |
9 | #endif | |
10 | #include <sys/param.h> | |
11 | #include <sys/inode.h> | |
12 | #include <sys/ino.h> | |
13 | #include <sys/fblk.h> | |
14 | #include <sys/filsys.h> | |
15 | #include <sys/dir.h> | |
16 | ||
17 | #define OBSIZE 512 | |
18 | ||
19 | /* from old <ino.h> */ | |
20 | ||
21 | #define OINOPB 8 /* 8 inodes per block */ | |
22 | ||
23 | /* old <dumprestor.h> */ | |
24 | #define NTREC 20 | |
25 | #define MLEN 16 | |
26 | #define MSIZ 4096 | |
27 | ||
28 | #define TS_TAPE 1 | |
29 | #define TS_INODE 2 | |
30 | #define TS_BITS 3 | |
31 | #define TS_ADDR 4 | |
32 | #define TS_END 5 | |
33 | #define TS_CLRI 6 | |
34 | #define MAGIC (int)60011 | |
35 | #define CHECKSUM (int)84446 | |
36 | struct spcl | |
37 | { | |
38 | int c_type; | |
39 | time_t c_date; | |
40 | time_t c_ddate; | |
41 | int c_volume; | |
42 | daddr_t c_tapea; | |
43 | ino_t c_inumber; | |
44 | int c_magic; | |
45 | int c_checksum; | |
46 | struct dinode c_dinode; | |
47 | int c_count; | |
48 | char c_addr[OBSIZE]; | |
49 | } spcl; | |
50 | ||
51 | struct idates | |
52 | { | |
53 | char id_name[16]; | |
54 | char id_incno; | |
55 | time_t id_ddate; | |
56 | }; | |
57 | ||
58 | /* end of old <dumprestor.h> */ | |
59 | ||
60 | #define MWORD(m,i) (m[(unsigned)(i-1)/MLEN]) | |
61 | #define MBIT(i) (1<<((unsigned)(i-1)%MLEN)) | |
62 | #define BIS(i,w) (MWORD(w,i) |= MBIT(i)) | |
63 | #define BIC(i,w) (MWORD(w,i) &= ~MBIT(i)) | |
64 | #define BIT(i,w) (MWORD(w,i) & MBIT(i)) | |
65 | ||
66 | struct filsys sblock; | |
67 | ||
68 | int fi; | |
69 | ino_t ino, maxi, curino; | |
70 | ||
71 | int mt; | |
72 | char tapename[] = "/dev/rmt1"; | |
73 | char *magtape = tapename; | |
74 | #ifdef STANDALONE | |
75 | char mbuf[50]; | |
76 | #endif | |
77 | ||
78 | #ifndef STANDALONE | |
79 | daddr_t seekpt; | |
80 | int df, ofile; | |
81 | char dirfile[] = "rstXXXXXX"; | |
82 | ||
83 | struct { | |
84 | ino_t t_ino; | |
85 | daddr_t t_seekpt; | |
86 | } inotab[MAXINO]; | |
87 | int ipos; | |
88 | ||
89 | #define ONTAPE 1 | |
90 | #define XTRACTD 2 | |
91 | #define XINUSE 4 | |
92 | struct xtrlist { | |
93 | ino_t x_ino; | |
94 | char x_flags; | |
95 | } xtrlist[MAXXTR]; | |
96 | ||
97 | char name[12]; | |
98 | ||
99 | char drblock[BSIZE]; | |
100 | int bpt; | |
101 | #endif | |
102 | ||
103 | int eflag; | |
104 | ||
105 | int volno = 1; | |
106 | ||
107 | struct dinode tino, dino; | |
108 | daddr_t taddr[NADDR]; | |
109 | ||
110 | daddr_t curbno; | |
111 | ||
112 | short dumpmap[MSIZ]; | |
113 | short clrimap[MSIZ]; | |
114 | ||
115 | ||
116 | int bct = NTREC+1; | |
117 | char tbf[NTREC*OBSIZE]; | |
118 | ||
119 | struct cache { | |
120 | daddr_t c_bno; | |
121 | int c_time; | |
122 | char c_block[BSIZE]; | |
123 | } cache[NCACHE]; | |
124 | int curcache; | |
125 | ||
126 | main(argc, argv) | |
127 | char *argv[]; | |
128 | { | |
129 | register char *cp; | |
130 | char command; | |
131 | int done(); | |
132 | ||
133 | #ifndef STANDALONE | |
134 | mktemp(dirfile); | |
135 | if (argc < 2) { | |
136 | usage: | |
137 | printf("Usage: oldrestor x file file..., oldrestor r filesys, or oldrestor t\n"); | |
138 | exit(1); | |
139 | } | |
140 | argv++; | |
141 | argc -= 2; | |
142 | for (cp = *argv++; *cp; cp++) { | |
143 | switch (*cp) { | |
144 | case '-': | |
145 | break; | |
146 | case 'f': | |
147 | magtape = *argv++; | |
148 | argc--; | |
149 | break; | |
150 | case 'r': | |
151 | case 'R': | |
152 | case 't': | |
153 | case 'x': | |
154 | command = *cp; | |
155 | break; | |
156 | default: | |
157 | printf("Bad key character %c\n", *cp); | |
158 | goto usage; | |
159 | } | |
160 | } | |
161 | if (command == 'x') { | |
162 | if (signal(SIGINT, done) == SIG_IGN) | |
163 | signal(SIGINT, SIG_IGN); | |
164 | if (signal(SIGTERM, done) == SIG_IGN) | |
165 | signal(SIGTERM, SIG_IGN); | |
166 | ||
167 | df = creat(dirfile, 0666); | |
168 | if (df < 0) { | |
169 | printf("restor: %s - cannot create directory temporary\n", dirfile); | |
170 | exit(1); | |
171 | } | |
172 | close(df); | |
173 | df = open(dirfile, 2); | |
174 | } | |
175 | doit(command, argc, argv); | |
176 | if (command == 'x') | |
177 | unlink(dirfile); | |
178 | exit(0); | |
179 | #else | |
180 | magtape = "tape"; | |
181 | doit('r', 1, 0); | |
182 | #endif | |
183 | } | |
184 | ||
185 | doit(command, argc, argv) | |
186 | char command; | |
187 | int argc; | |
188 | char *argv[]; | |
189 | { | |
190 | extern char *ctime(); | |
191 | register i, k; | |
192 | ino_t d; | |
193 | #ifndef STANDALONE | |
194 | int xtrfile(), skip(); | |
195 | #endif | |
196 | int rstrfile(), rstrskip(); | |
197 | struct dinode *ip, *ip1; | |
198 | ||
199 | #ifndef STANDALONE | |
200 | if ((mt = open(magtape, 0)) < 0) { | |
201 | printf("%s: cannot open tape\n", magtape); | |
202 | exit(1); | |
203 | } | |
204 | #else | |
205 | do { | |
206 | printf("Tape? "); | |
207 | gets(mbuf); | |
208 | mt = open(mbuf, 0); | |
209 | } while (mt == -1); | |
210 | magtape = mbuf; | |
211 | #endif | |
212 | switch(command) { | |
213 | #ifndef STANDALONE | |
214 | case 't': | |
215 | if (readhdr(&spcl) == 0) { | |
216 | printf("Tape is not a dump tape\n"); | |
217 | exit(1); | |
218 | } | |
219 | printf("Dump date: %s", ctime(&spcl.c_date)); | |
220 | printf("Dumped from: %s", ctime(&spcl.c_ddate)); | |
221 | return; | |
222 | case 'x': | |
223 | if (readhdr(&spcl) == 0) { | |
224 | printf("Tape is not a dump tape\n"); | |
225 | exit(1); | |
226 | } | |
227 | if (checkvol(&spcl, 1) == 0) { | |
228 | printf("Tape is not volume 1 of the dump\n"); | |
229 | exit(1); | |
230 | } | |
231 | pass1(); /* This sets the various maps on the way by */ | |
232 | i = 0; | |
233 | while (i < MAXXTR-1 && argc--) { | |
234 | if ((d = psearch(*argv)) == 0 || BIT(d, dumpmap) == 0) { | |
235 | printf("%s: not on the tape\n", *argv++); | |
236 | continue; | |
237 | } | |
238 | xtrlist[i].x_ino = d; | |
239 | xtrlist[i].x_flags |= XINUSE; | |
240 | printf("%s: inode %u\n", *argv, d); | |
241 | argv++; | |
242 | i++; | |
243 | } | |
244 | newvol: | |
245 | flsht(); | |
246 | close(mt); | |
247 | getvol: | |
248 | printf("Mount desired tape volume: Specify volume #: "); | |
249 | if (gets(tbf) == NULL) | |
250 | return; | |
251 | volno = atoi(tbf); | |
252 | if (volno <= 0) { | |
253 | printf("Volume numbers are positive numerics\n"); | |
254 | goto getvol; | |
255 | } | |
256 | mt = open(magtape, 0); | |
257 | if (readhdr(&spcl) == 0) { | |
258 | printf("tape is not dump tape\n"); | |
259 | goto newvol; | |
260 | } | |
261 | if (checkvol(&spcl, volno) == 0) { | |
262 | printf("Wrong volume (%d)\n", spcl.c_volume); | |
263 | goto newvol; | |
264 | } | |
265 | rbits: | |
266 | while (gethead(&spcl) == 0) | |
267 | ; | |
268 | if (checktype(&spcl, TS_INODE) == 1) { | |
269 | printf("Can't find inode mask!\n"); | |
270 | goto newvol; | |
271 | } | |
272 | if (checktype(&spcl, TS_BITS) == 0) | |
273 | goto rbits; | |
274 | readbits(dumpmap); | |
275 | i = 0; | |
276 | for (k = 0; xtrlist[k].x_flags; k++) { | |
277 | if (BIT(xtrlist[k].x_ino, dumpmap)) { | |
278 | xtrlist[k].x_flags |= ONTAPE; | |
279 | i++; | |
280 | } | |
281 | } | |
282 | while (i > 0) { | |
283 | again: | |
284 | if (ishead(&spcl) == 0) | |
285 | while(gethead(&spcl) == 0) | |
286 | ; | |
287 | if (checktype(&spcl, TS_END) == 1) { | |
288 | printf("end of tape\n"); | |
289 | checkdone: | |
290 | for (k = 0; xtrlist[k].x_flags; k++) | |
291 | if ((xtrlist[k].x_flags&XTRACTD) == 0) | |
292 | goto newvol; | |
293 | return; | |
294 | } | |
295 | if (checktype(&spcl, TS_INODE) == 0) { | |
296 | gethead(&spcl); | |
297 | goto again; | |
298 | } | |
299 | d = spcl.c_inumber; | |
300 | for (k = 0; xtrlist[k].x_flags; k++) { | |
301 | if (d == xtrlist[k].x_ino) { | |
302 | printf("extract file %u\n", xtrlist[k].x_ino); | |
303 | sprintf(name, "%u", xtrlist[k].x_ino); | |
304 | if ((ofile = creat(name, 0666)) < 0) { | |
305 | printf("%s: cannot create file\n", name); | |
306 | i--; | |
307 | continue; | |
308 | } | |
309 | chown(name, spcl.c_dinode.di_uid, spcl.c_dinode.di_gid); | |
310 | getfile(ino, xtrfile, skip, spcl.c_dinode.di_size); | |
311 | i--; | |
312 | xtrlist[k].x_flags |= XTRACTD; | |
313 | close(ofile); | |
314 | goto done; | |
315 | } | |
316 | } | |
317 | gethead(&spcl); | |
318 | done: | |
319 | ; | |
320 | } | |
321 | goto checkdone; | |
322 | #endif | |
323 | case 'r': | |
324 | case 'R': | |
325 | #ifndef STANDALONE | |
326 | if ((fi = open(*argv, 2)) < 0) { | |
327 | printf("%s: cannot open\n", *argv); | |
328 | exit(1); | |
329 | } | |
330 | #else | |
331 | do { | |
332 | char charbuf[50]; | |
333 | ||
334 | printf("Disk? "); | |
335 | gets(charbuf); | |
336 | fi = open(charbuf, 2); | |
337 | } while (fi == -1); | |
338 | #endif | |
339 | #ifndef STANDALONE | |
340 | if (command == 'R') { | |
341 | printf("Enter starting volume number: "); | |
342 | if (gets(tbf) == EOF) { | |
343 | volno = 1; | |
344 | printf("\n"); | |
345 | } | |
346 | else | |
347 | volno = atoi(tbf); | |
348 | } | |
349 | else | |
350 | #endif | |
351 | volno = 1; | |
352 | printf("Last chance before scribbling on %s. ", | |
353 | #ifdef STANDALONE | |
354 | "disk"); | |
355 | #else | |
356 | *argv); | |
357 | #endif | |
358 | while (getchar() != '\n'); | |
359 | dread((daddr_t)1, (char *)&sblock, sizeof(sblock)); | |
360 | maxi = (sblock.s_isize-2)*INOPB; | |
361 | if (readhdr(&spcl) == 0) { | |
362 | printf("Missing volume record\n"); | |
363 | exit(1); | |
364 | } | |
365 | if (checkvol(&spcl, volno) == 0) { | |
366 | printf("Tape is not volume %d\n", volno); | |
367 | exit(1); | |
368 | } | |
369 | gethead(&spcl); | |
370 | for (;;) { | |
371 | ragain: | |
372 | if (ishead(&spcl) == 0) { | |
373 | printf("Missing header block\n"); | |
374 | while (gethead(&spcl) == 0) | |
375 | ; | |
376 | eflag++; | |
377 | } | |
378 | if (checktype(&spcl, TS_END) == 1) { | |
379 | printf("End of tape\n"); | |
380 | close(mt); | |
381 | dwrite( (daddr_t) 1, (char *) &sblock); | |
382 | return; | |
383 | } | |
384 | if (checktype(&spcl, TS_CLRI) == 1) { | |
385 | readbits(clrimap); | |
386 | for (ino = 1; ino <= maxi; ino++) | |
387 | if (BIT(ino, clrimap) == 0) { | |
388 | getdino(ino, &tino); | |
389 | if (tino.di_mode == 0) | |
390 | continue; | |
391 | itrunc(&tino); | |
392 | clri(&tino); | |
393 | putdino(ino, &tino); | |
394 | } | |
395 | dwrite( (daddr_t) 1, (char *) &sblock); | |
396 | goto ragain; | |
397 | } | |
398 | if (checktype(&spcl, TS_BITS) == 1) { | |
399 | readbits(dumpmap); | |
400 | goto ragain; | |
401 | } | |
402 | if (checktype(&spcl, TS_INODE) == 0) { | |
403 | printf("Unknown header type\n"); | |
404 | eflag++; | |
405 | gethead(&spcl); | |
406 | goto ragain; | |
407 | } | |
408 | ino = spcl.c_inumber; | |
409 | if (eflag) | |
410 | printf("Resynced at inode %u\n", ino); | |
411 | eflag = 0; | |
412 | if (ino > maxi) { | |
413 | printf("%u: ilist too small\n", ino); | |
414 | gethead(&spcl); | |
415 | goto ragain; | |
416 | } | |
417 | dino = spcl.c_dinode; | |
418 | getdino(ino, &tino); | |
419 | curbno = 0; | |
420 | itrunc(&tino); | |
421 | clri(&tino); | |
422 | for (i = 0; i < NADDR; i++) | |
423 | taddr[i] = 0; | |
424 | l3tol(taddr, dino.di_addr, 1); | |
425 | getfile(d, rstrfile, rstrskip, dino.di_size); | |
426 | ip = &tino; | |
427 | ltol3(ip->di_addr, taddr, NADDR); | |
428 | ip1 = &dino; | |
429 | ip->di_mode = ip1->di_mode; | |
430 | ip->di_nlink = ip1->di_nlink; | |
431 | ip->di_uid = ip1->di_uid; | |
432 | ip->di_gid = ip1->di_gid; | |
433 | ip->di_size = ip1->di_size; | |
434 | ip->di_atime = ip1->di_atime; | |
435 | ip->di_mtime = ip1->di_mtime; | |
436 | ip->di_ctime = ip1->di_ctime; | |
437 | putdino(ino, &tino); | |
438 | } | |
439 | } | |
440 | } | |
441 | ||
442 | /* | |
443 | * Read the tape, bulding up a directory structure for extraction | |
444 | * by name | |
445 | */ | |
446 | #ifndef STANDALONE | |
447 | pass1() | |
448 | { | |
449 | register i; | |
450 | struct dinode *ip; | |
451 | int putdir(), null(); | |
452 | ||
453 | while (gethead(&spcl) == 0) { | |
454 | printf("Can't find directory header!\n"); | |
455 | } | |
456 | for (;;) { | |
457 | if (checktype(&spcl, TS_BITS) == 1) { | |
458 | readbits(dumpmap); | |
459 | continue; | |
460 | } | |
461 | if (checktype(&spcl, TS_CLRI) == 1) { | |
462 | readbits(clrimap); | |
463 | continue; | |
464 | } | |
465 | if (checktype(&spcl, TS_INODE) == 0) { | |
466 | finish: | |
467 | flsh(); | |
468 | close(mt); | |
469 | return; | |
470 | } | |
471 | ip = &spcl.c_dinode; | |
472 | i = ip->di_mode & IFMT; | |
473 | if (i != IFDIR) { | |
474 | goto finish; | |
475 | } | |
476 | inotab[ipos].t_ino = spcl.c_inumber; | |
477 | inotab[ipos++].t_seekpt = seekpt; | |
478 | getfile(spcl.c_inumber, putdir, null, spcl.c_dinode.di_size); | |
479 | putent("\000\000/"); | |
480 | } | |
481 | } | |
482 | #endif | |
483 | ||
484 | /* | |
485 | * Do the file extraction, calling the supplied functions | |
486 | * with the blocks | |
487 | */ | |
488 | getfile(n, f1, f2, size) | |
489 | ino_t n; | |
490 | int (*f2)(), (*f1)(); | |
491 | long size; | |
492 | { | |
493 | register i; | |
494 | struct spcl addrblock; | |
495 | char buf[BSIZE]; | |
496 | ||
497 | addrblock = spcl; | |
498 | curino = n; | |
499 | goto start; | |
500 | for (;;) { | |
501 | if (gethead(&addrblock) == 0) { | |
502 | printf("Missing address (header) block\n"); | |
503 | goto eloop; | |
504 | } | |
505 | if (checktype(&addrblock, TS_ADDR) == 0) { | |
506 | spcl = addrblock; | |
507 | curino = 0; | |
508 | curino = 0; | |
509 | return; | |
510 | } | |
511 | start: | |
512 | for (i = 0; i < addrblock.c_count; i += 2) { | |
513 | if (addrblock.c_addr[i]) | |
514 | readtape(buf, 0); | |
515 | else | |
516 | clearbuf(buf, 0); | |
517 | if (size > OBSIZE && addrblock.c_addr[i+1]) | |
518 | readtape(buf, 1); | |
519 | else | |
520 | clearbuf(buf, 1); | |
521 | if (addrblock.c_addr[i] || size > OBSIZE && addrblock.c_addr[i + 1]) | |
522 | (*f1)(buf, size > BSIZE ? (long) BSIZE : size); | |
523 | else | |
524 | (*f2)(buf, size > BSIZE ? (long) BSIZE : size); | |
525 | if ((size -= BSIZE) <= 0) { | |
526 | eloop: | |
527 | while (gethead(&spcl) == 0) | |
528 | ; | |
529 | if (checktype(&spcl, TS_ADDR) == 1) | |
530 | goto eloop; | |
531 | curino = 0; | |
532 | return; | |
533 | } | |
534 | } | |
535 | } | |
536 | } | |
537 | ||
538 | /* | |
539 | * Do the tape i\/o, dealling with volume changes | |
540 | * etc.. | |
541 | */ | |
542 | readtape(b, part) | |
543 | char *b; | |
544 | { | |
545 | register i; | |
546 | struct spcl tmpbuf; | |
547 | ||
548 | if (bct >= NTREC) { | |
549 | for (i = 0; i < NTREC; i++) | |
550 | ((struct spcl *)&tbf[i*OBSIZE])->c_magic = 0; | |
551 | bct = 0; | |
552 | if ((i = read(mt, tbf, NTREC*OBSIZE)) < 0) { | |
553 | printf("Tape read error: inode %u\n", curino); | |
554 | eflag++; | |
555 | exit(1); | |
556 | } | |
557 | if (i == 0) { | |
558 | bct = NTREC + 1; | |
559 | volno++; | |
560 | loop: | |
561 | flsht(); | |
562 | close(mt); | |
563 | printf("Mount volume %d\n", volno); | |
564 | while (getchar() != '\n') | |
565 | ; | |
566 | if ((mt = open(magtape, 0)) == -1) { | |
567 | printf("Cannot open tape!\n"); | |
568 | goto loop; | |
569 | } | |
570 | if (readhdr(&tmpbuf) == 0) { | |
571 | printf("Not a dump tape.Try again\n"); | |
572 | goto loop; | |
573 | } | |
574 | if (checkvol(&tmpbuf, volno) == 0) { | |
575 | printf("Wrong tape. Try again\n"); | |
576 | goto loop; | |
577 | } | |
578 | readtape(b, part); | |
579 | return; | |
580 | } | |
581 | } | |
582 | copy(&tbf[(bct++*OBSIZE)], b + part * OBSIZE, OBSIZE); | |
583 | } | |
584 | ||
585 | flsht() | |
586 | { | |
587 | bct = NTREC+1; | |
588 | } | |
589 | ||
590 | copy(f, t, s) | |
591 | register char *f, *t; | |
592 | { | |
593 | register i; | |
594 | ||
595 | i = s; | |
596 | do | |
597 | *t++ = *f++; | |
598 | while (--i); | |
599 | } | |
600 | ||
601 | clearbuf(cp, part) | |
602 | register char *cp; | |
603 | { | |
604 | register i; | |
605 | ||
606 | cp += part * OBSIZE; | |
607 | i = OBSIZE; | |
608 | do | |
609 | *cp++ = 0; | |
610 | while (--i); | |
611 | } | |
612 | ||
613 | /* | |
614 | * Put and get the directory entries from the compressed | |
615 | * directory file | |
616 | */ | |
617 | #ifndef STANDALONE | |
618 | putent(cp) | |
619 | char *cp; | |
620 | { | |
621 | register i; | |
622 | ||
623 | for (i = 0; i < sizeof(ino_t); i++) | |
624 | writec(*cp++); | |
625 | for (i = 0; i < DIRSIZ; i++) { | |
626 | writec(*cp); | |
627 | if (*cp++ == 0) | |
628 | return; | |
629 | } | |
630 | return; | |
631 | } | |
632 | ||
633 | getent(bf) | |
634 | register char *bf; | |
635 | { | |
636 | register i; | |
637 | ||
638 | for (i = 0; i < sizeof(ino_t); i++) | |
639 | *bf++ = readc(); | |
640 | for (i = 0; i < DIRSIZ; i++) | |
641 | if ((*bf++ = readc()) == 0) | |
642 | return; | |
643 | return; | |
644 | } | |
645 | ||
646 | /* | |
647 | * read/write te directory file | |
648 | */ | |
649 | writec(c) | |
650 | char c; | |
651 | { | |
652 | drblock[bpt++] = c; | |
653 | seekpt++; | |
654 | if (bpt >= BSIZE) { | |
655 | bpt = 0; | |
656 | write(df, drblock, BSIZE); | |
657 | } | |
658 | } | |
659 | ||
660 | readc() | |
661 | { | |
662 | if (bpt >= BSIZE) { | |
663 | read(df, drblock, BSIZE); | |
664 | bpt = 0; | |
665 | } | |
666 | return(drblock[bpt++]); | |
667 | } | |
668 | ||
669 | mseek(pt) | |
670 | daddr_t pt; | |
671 | { | |
672 | bpt = BSIZE; | |
673 | lseek(df, pt, 0); | |
674 | } | |
675 | ||
676 | flsh() | |
677 | { | |
678 | write(df, drblock, bpt+1); | |
679 | } | |
680 | ||
681 | /* | |
682 | * search the directory inode ino | |
683 | * looking for entry cp | |
684 | */ | |
685 | ino_t | |
686 | search(inum, cp) | |
687 | ino_t inum; | |
688 | char *cp; | |
689 | { | |
690 | register i; | |
691 | struct direct dir; | |
692 | ||
693 | for (i = 0; i < MAXINO; i++) | |
694 | if (inotab[i].t_ino == inum) { | |
695 | goto found; | |
696 | } | |
697 | return(0); | |
698 | found: | |
699 | mseek(inotab[i].t_seekpt); | |
700 | do { | |
701 | getent((char *)&dir); | |
702 | if (direq(dir.d_name, "/")) | |
703 | return(0); | |
704 | } while (direq(dir.d_name, cp) == 0); | |
705 | return(dir.d_ino); | |
706 | } | |
707 | ||
708 | /* | |
709 | * Search the directory tree rooted at inode 2 | |
710 | * for the path pointed at by n | |
711 | */ | |
712 | psearch(n) | |
713 | char *n; | |
714 | { | |
715 | register char *cp, *cp1; | |
716 | char c; | |
717 | ||
718 | ino = 2; | |
719 | if (*(cp = n) == '/') | |
720 | cp++; | |
721 | next: | |
722 | cp1 = cp + 1; | |
723 | while (*cp1 != '/' && *cp1) | |
724 | cp1++; | |
725 | c = *cp1; | |
726 | *cp1 = 0; | |
727 | ino = search(ino, cp); | |
728 | if (ino == 0) { | |
729 | *cp1 = c; | |
730 | return(0); | |
731 | } | |
732 | *cp1 = c; | |
733 | if (c == '/') { | |
734 | cp = cp1+1; | |
735 | goto next; | |
736 | } | |
737 | return(ino); | |
738 | } | |
739 | ||
740 | direq(s1, s2) | |
741 | register char *s1, *s2; | |
742 | { | |
743 | register i; | |
744 | ||
745 | for (i = 0; i < DIRSIZ; i++) | |
746 | if (*s1++ == *s2) { | |
747 | if (*s2++ == 0) | |
748 | return(1); | |
749 | } else | |
750 | return(0); | |
751 | return(1); | |
752 | } | |
753 | #endif | |
754 | ||
755 | /* | |
756 | * read/write a disk block, be sure to update the buffer | |
757 | * cache if needed. | |
758 | */ | |
759 | dwrite(bno, b) | |
760 | daddr_t bno; | |
761 | char *b; | |
762 | { | |
763 | register i; | |
764 | ||
765 | for (i = 0; i < NCACHE; i++) { | |
766 | if (cache[i].c_bno == bno) { | |
767 | copy(b, cache[i].c_block, BSIZE); | |
768 | cache[i].c_time = 0; | |
769 | break; | |
770 | } | |
771 | else | |
772 | cache[i].c_time++; | |
773 | } | |
774 | lseek(fi, bno*BSIZE, 0); | |
775 | if(write(fi, b, BSIZE) != BSIZE) { | |
776 | #ifdef STANDALONE | |
777 | printf("disk write error %D\n", bno); | |
778 | #else | |
779 | fprintf(stderr, "disk write error %ld\n", bno); | |
780 | #endif | |
781 | exit(1); | |
782 | } | |
783 | } | |
784 | ||
785 | dread(bno, buf, cnt) | |
786 | daddr_t bno; | |
787 | char *buf; | |
788 | { | |
789 | register i, j; | |
790 | ||
791 | j = 0; | |
792 | for (i = 0; i < NCACHE; i++) { | |
793 | if (++curcache >= NCACHE) | |
794 | curcache = 0; | |
795 | if (cache[curcache].c_bno == bno) { | |
796 | copy(cache[curcache].c_block, buf, cnt); | |
797 | cache[curcache].c_time = 0; | |
798 | return; | |
799 | } | |
800 | else { | |
801 | cache[curcache].c_time++; | |
802 | if (cache[j].c_time < cache[curcache].c_time) | |
803 | j = curcache; | |
804 | } | |
805 | } | |
806 | ||
807 | lseek(fi, bno*BSIZE, 0); | |
808 | if (read(fi, cache[j].c_block, BSIZE) != BSIZE) { | |
809 | #ifdef STANDALONE | |
810 | printf("read error %D\n", bno); | |
811 | #else | |
812 | printf("read error %ld\n", bno); | |
813 | #endif | |
814 | exit(1); | |
815 | } | |
816 | copy(cache[j].c_block, buf, cnt); | |
817 | cache[j].c_time = 0; | |
818 | cache[j].c_bno = bno; | |
819 | } | |
820 | ||
821 | /* | |
822 | * the inode manpulation routines. Like the system. | |
823 | * | |
824 | * clri zeros the inode | |
825 | */ | |
826 | clri(ip) | |
827 | struct dinode *ip; | |
828 | { | |
829 | int i, *p; | |
830 | i = sizeof(struct dinode)/sizeof(int); | |
831 | p = (int *)ip; | |
832 | do | |
833 | *p++ = 0; | |
834 | while(--i); | |
835 | } | |
836 | ||
837 | /* | |
838 | * itrunc/tloop/bfree free all of the blocks pointed at by the inode | |
839 | */ | |
840 | itrunc(ip) | |
841 | register struct dinode *ip; | |
842 | { | |
843 | register i; | |
844 | daddr_t bn, iaddr[NADDR]; | |
845 | ||
846 | if (ip->di_mode == 0) | |
847 | return; | |
848 | i = ip->di_mode & IFMT; | |
849 | if (i != IFDIR && i != IFREG) | |
850 | return; | |
851 | l3tol(iaddr, ip->di_addr, NADDR); | |
852 | for(i=NADDR-1;i>=0;i--) { | |
853 | bn = iaddr[i]; | |
854 | if(bn == 0) continue; | |
855 | switch(i) { | |
856 | ||
857 | default: | |
858 | bfree(bn); | |
859 | break; | |
860 | ||
861 | case NADDR-3: | |
862 | tloop(bn, 0, 0); | |
863 | break; | |
864 | ||
865 | case NADDR-2: | |
866 | tloop(bn, 1, 0); | |
867 | break; | |
868 | ||
869 | case NADDR-1: | |
870 | tloop(bn, 1, 1); | |
871 | } | |
872 | } | |
873 | ip->di_size = 0; | |
874 | } | |
875 | ||
876 | tloop(bn, f1, f2) | |
877 | daddr_t bn; | |
878 | int f1, f2; | |
879 | { | |
880 | register i; | |
881 | daddr_t nb; | |
882 | union { | |
883 | char data[BSIZE]; | |
884 | daddr_t indir[NINDIR]; | |
885 | } ibuf; | |
886 | ||
887 | dread(bn, ibuf.data, BSIZE); | |
888 | for(i=NINDIR-1;i>=0;i--) { | |
889 | nb = ibuf.indir[i]; | |
890 | if(nb) { | |
891 | if(f1) | |
892 | tloop(nb, f2, 0); | |
893 | else | |
894 | bfree(nb); | |
895 | } | |
896 | } | |
897 | bfree(bn); | |
898 | } | |
899 | ||
900 | bfree(bn) | |
901 | daddr_t bn; | |
902 | { | |
903 | register i; | |
904 | union { | |
905 | char data[BSIZE]; | |
906 | struct fblk frees; | |
907 | } fbuf; | |
908 | ||
909 | if(sblock.s_nfree >= NICFREE) { | |
910 | fbuf.df_nfree = sblock.s_nfree; | |
911 | for(i=0;i<NICFREE;i++) | |
912 | fbuf.df_free[i] = sblock.s_free[i]; | |
913 | sblock.s_nfree = 0; | |
914 | dwrite(bn, fbuf.data); | |
915 | } | |
916 | sblock.s_free[sblock.s_nfree++] = bn; | |
917 | } | |
918 | ||
919 | /* | |
920 | * allocate a block off the free list. | |
921 | */ | |
922 | daddr_t | |
923 | balloc() | |
924 | { | |
925 | daddr_t bno; | |
926 | register i; | |
927 | static char zeroes[BSIZE]; | |
928 | union { | |
929 | char data[BSIZE]; | |
930 | struct fblk frees; | |
931 | } fbuf; | |
932 | ||
933 | if(sblock.s_nfree == 0 || (bno=sblock.s_free[--sblock.s_nfree]) == 0) { | |
934 | #ifdef STANDALONE | |
935 | printf("Out of space\n"); | |
936 | #else | |
937 | fprintf(stderr, "Out of space.\n"); | |
938 | #endif | |
939 | exit(1); | |
940 | } | |
941 | if(sblock.s_nfree == 0) { | |
942 | dread(bno, fbuf.data, BSIZE); | |
943 | sblock.s_nfree = fbuf.df_nfree; | |
944 | for(i=0;i<NICFREE;i++) | |
945 | sblock.s_free[i] = fbuf.df_free[i]; | |
946 | } | |
947 | dwrite(bno, zeroes); | |
948 | return(bno); | |
949 | } | |
950 | ||
951 | /* | |
952 | * map a block number into a block address, ensuring | |
953 | * all of the correct indirect blocks are around. Allocate | |
954 | * the block requested. | |
955 | */ | |
956 | daddr_t | |
957 | bmap(iaddr, bn) | |
958 | daddr_t iaddr[NADDR]; | |
959 | daddr_t bn; | |
960 | { | |
961 | register i; | |
962 | int j, sh; | |
963 | daddr_t nb, nnb; | |
964 | daddr_t indir[NINDIR]; | |
965 | ||
966 | /* | |
967 | * blocks 0..NADDR-4 are direct blocks | |
968 | */ | |
969 | if(bn < NADDR-3) { | |
970 | iaddr[bn] = nb = balloc(); | |
971 | return(nb); | |
972 | } | |
973 | ||
974 | /* | |
975 | * addresses NADDR-3, NADDR-2, and NADDR-1 | |
976 | * have single, double, triple indirect blocks. | |
977 | * the first step is to determine | |
978 | * how many levels of indirection. | |
979 | */ | |
980 | sh = 0; | |
981 | nb = 1; | |
982 | bn -= NADDR-3; | |
983 | for(j=3; j>0; j--) { | |
984 | sh += NSHIFT; | |
985 | nb <<= NSHIFT; | |
986 | if(bn < nb) | |
987 | break; | |
988 | bn -= nb; | |
989 | } | |
990 | if(j == 0) { | |
991 | return((daddr_t)0); | |
992 | } | |
993 | ||
994 | /* | |
995 | * fetch the address from the inode | |
996 | */ | |
997 | if((nb = iaddr[NADDR-j]) == 0) { | |
998 | iaddr[NADDR-j] = nb = balloc(); | |
999 | } | |
1000 | ||
1001 | /* | |
1002 | * fetch through the indirect blocks | |
1003 | */ | |
1004 | for(; j<=3; j++) { | |
1005 | dread(nb, (char *)indir, BSIZE); | |
1006 | sh -= NSHIFT; | |
1007 | i = (bn>>sh) & NMASK; | |
1008 | nnb = indir[i]; | |
1009 | if(nnb == 0) { | |
1010 | nnb = balloc(); | |
1011 | indir[i] = nnb; | |
1012 | dwrite(nb, (char *)indir); | |
1013 | } | |
1014 | nb = nnb; | |
1015 | } | |
1016 | return(nb); | |
1017 | } | |
1018 | ||
1019 | /* | |
1020 | * read the tape into buf, then return whether or | |
1021 | * or not it is a header block. | |
1022 | */ | |
1023 | gethead(buf) | |
1024 | struct spcl *buf; | |
1025 | { | |
1026 | readtape((char *)buf, 0); | |
1027 | if (buf->c_magic != MAGIC || checksum((int *) buf) == 0) | |
1028 | return(0); | |
1029 | return(1); | |
1030 | } | |
1031 | ||
1032 | /* | |
1033 | * return whether or not the buffer contains a header block | |
1034 | */ | |
1035 | ishead(buf) | |
1036 | struct spcl *buf; | |
1037 | { | |
1038 | if (buf->c_magic != MAGIC || checksum((int *) buf) == 0) | |
1039 | return(0); | |
1040 | return(1); | |
1041 | } | |
1042 | ||
1043 | checktype(b, t) | |
1044 | struct spcl *b; | |
1045 | int t; | |
1046 | { | |
1047 | return(b->c_type == t); | |
1048 | } | |
1049 | ||
1050 | ||
1051 | checksum(b) | |
1052 | int *b; | |
1053 | { | |
1054 | register i, j; | |
1055 | ||
1056 | j = OBSIZE/sizeof(int); | |
1057 | i = 0; | |
1058 | do | |
1059 | i += *b++; | |
1060 | while (--j); | |
1061 | if (i != CHECKSUM) { | |
1062 | printf("Checksum error %o\n", i); | |
1063 | return(0); | |
1064 | } | |
1065 | return(1); | |
1066 | } | |
1067 | ||
1068 | checkvol(b, t) | |
1069 | struct spcl *b; | |
1070 | int t; | |
1071 | { | |
1072 | if (b->c_volume == t) | |
1073 | return(1); | |
1074 | return(0); | |
1075 | } | |
1076 | ||
1077 | readhdr(b) | |
1078 | struct spcl *b; | |
1079 | { | |
1080 | if (gethead(b) == 0) | |
1081 | return(0); | |
1082 | if (checktype(b, TS_TAPE) == 0) | |
1083 | return(0); | |
1084 | return(1); | |
1085 | } | |
1086 | ||
1087 | /* | |
1088 | * The next routines are called during file extraction to | |
1089 | * put the data into the right form and place. | |
1090 | */ | |
1091 | #ifndef STANDALONE | |
1092 | xtrfile(b, size) | |
1093 | char *b; | |
1094 | long size; | |
1095 | { | |
1096 | write(ofile, b, (int) size); | |
1097 | } | |
1098 | ||
1099 | null() {;} | |
1100 | ||
1101 | skip() | |
1102 | { | |
1103 | lseek(ofile, (long) OBSIZE, 1); | |
1104 | } | |
1105 | #endif | |
1106 | ||
1107 | ||
1108 | rstrfile(b, s) | |
1109 | char *b; | |
1110 | long s; | |
1111 | { | |
1112 | daddr_t d; | |
1113 | ||
1114 | d = bmap(taddr, curbno); | |
1115 | dwrite(d, b); | |
1116 | curbno += 1; | |
1117 | } | |
1118 | ||
1119 | rstrskip(b, s) | |
1120 | char *b; | |
1121 | long s; | |
1122 | { | |
1123 | curbno += 1; | |
1124 | } | |
1125 | ||
1126 | #ifndef STANDALONE | |
1127 | putdir(b) | |
1128 | char *b; | |
1129 | { | |
1130 | register struct direct *dp; | |
1131 | register i; | |
1132 | ||
1133 | for (dp = (struct direct *) b, i = 0; i < BSIZE; dp++, i += sizeof(*dp)) { | |
1134 | if (dp->d_ino == 0) | |
1135 | continue; | |
1136 | putent((char *) dp); | |
1137 | } | |
1138 | } | |
1139 | #endif | |
1140 | ||
1141 | /* | |
1142 | * read/write an inode from the disk | |
1143 | */ | |
1144 | getdino(inum, b) | |
1145 | ino_t inum; | |
1146 | struct dinode *b; | |
1147 | { | |
1148 | daddr_t bno; | |
1149 | char buf[BSIZE]; | |
1150 | ||
1151 | bno = (ino - 1)/INOPB; | |
1152 | bno += 2; | |
1153 | dread(bno, buf, BSIZE); | |
1154 | copy(&buf[((inum-1)%INOPB)*sizeof(struct dinode)], (char *) b, sizeof(struct dinode)); | |
1155 | } | |
1156 | ||
1157 | putdino(inum, b) | |
1158 | ino_t inum; | |
1159 | struct dinode *b; | |
1160 | { | |
1161 | daddr_t bno; | |
1162 | char buf[BSIZE]; | |
1163 | ||
1164 | bno = ((ino - 1)/INOPB) + 2; | |
1165 | dread(bno, buf, BSIZE); | |
1166 | copy((char *) b, &buf[((inum-1)%INOPB)*sizeof(struct dinode)], sizeof(struct dinode)); | |
1167 | dwrite(bno, buf); | |
1168 | } | |
1169 | ||
1170 | /* | |
1171 | * read a bit mask from the tape into m. | |
1172 | */ | |
1173 | readbits(m) | |
1174 | short *m; | |
1175 | { | |
1176 | register i; | |
1177 | ||
1178 | i = spcl.c_count; | |
1179 | ||
1180 | while (i--) { | |
1181 | readtape((char *) m, 0); | |
1182 | m += (OBSIZE/(MLEN/BITS)); | |
1183 | } | |
1184 | while (gethead(&spcl) == 0) | |
1185 | ; | |
1186 | } | |
1187 | ||
1188 | done() | |
1189 | { | |
1190 | unlink(dirfile); | |
1191 | exit(0); | |
1192 | } |