Commit | Line | Data |
---|---|---|
c1984ed6 BJ |
1 | #define MAXINO 2000 |
2 | #define BITS 8 | |
3 | #define MAXXTR 60 | |
4 | #define NCACHE 3 | |
5 | ||
6 | #include <stdio.h> | |
7 | #include <sys/param.h> | |
8 | #include <sys/inode.h> | |
9 | #include <sys/ino.h> | |
10 | #include <sys/fblk.h> | |
11 | #include <sys/filsys.h> | |
12 | #include <sys/dir.h> | |
13 | #include <dumprestor.h> | |
14 | ||
15 | #define MWORD(m,i) (m[(unsigned)(i-1)/MLEN]) | |
16 | #define MBIT(i) (1<<((unsigned)(i-1)%MLEN)) | |
17 | #define BIS(i,w) (MWORD(w,i) |= MBIT(i)) | |
18 | #define BIC(i,w) (MWORD(w,i) &= ~MBIT(i)) | |
19 | #define BIT(i,w) (MWORD(w,i) & MBIT(i)) | |
20 | ||
21 | int mt; | |
22 | char tapename[] = "/dev/rmt1"; | |
23 | char *magtape = tapename; | |
24 | ||
25 | daddr_t seekpt; | |
26 | int ofile; | |
27 | FILE *df; | |
28 | char dirfile[] = "rstXXXXXX"; | |
29 | ||
30 | struct { | |
31 | ino_t t_ino; | |
32 | daddr_t t_seekpt; | |
33 | } inotab[MAXINO]; | |
34 | int ipos; | |
35 | ||
36 | #define ONTAPE 1 | |
37 | #define XTRACTD 2 | |
38 | #define XINUSE 4 | |
39 | ||
40 | short dumpmap[MSIZ]; | |
41 | short clrimap[MSIZ]; | |
42 | ||
43 | ||
44 | int bct = NTREC+1; | |
45 | char tbf[NTREC*BSIZE]; | |
46 | ||
47 | char prebuf[BUFSIZ]; | |
48 | ||
49 | int volno; | |
50 | ||
51 | main(argc, argv) | |
52 | char *argv[]; | |
53 | { | |
54 | extern char *ctime(); | |
55 | ||
56 | mktemp(dirfile); | |
57 | argv++; | |
58 | if (argc>=3 && *argv[0] == 'f') | |
59 | magtape = *++argv; | |
60 | df = fopen(dirfile, "w"); | |
61 | if (df == NULL) { | |
62 | printf("dumpdir: %s - cannot create directory temporary\n", dirfile); | |
63 | exit(1); | |
64 | } | |
65 | ||
66 | if ((mt = open(magtape, 0)) < 0) { | |
67 | printf("%s: cannot open tape\n", magtape); | |
68 | exit(1); | |
69 | } | |
70 | if (readhdr(&spcl) == 0) { | |
71 | printf("Tape is not a dump tape\n"); | |
72 | exit(1); | |
73 | } | |
74 | printf("Dump date: %s", ctime(&spcl.c_date)); | |
75 | printf("Dumped from: %s", ctime(&spcl.c_ddate)); | |
76 | if (checkvol(&spcl, 1) == 0) { | |
77 | printf("Tape is not volume 1 of the dump\n"); | |
78 | exit(1); | |
79 | } | |
80 | pass1(); /* This sets the various maps on the way by */ | |
81 | freopen(dirfile, "r", df); | |
82 | strcpy(prebuf, "/"); | |
83 | printem(prebuf, (ino_t) 2); | |
84 | exit(0); | |
85 | } | |
86 | i = 0; | |
87 | /* | |
88 | * Read the tape, bulding up a directory structure for extraction | |
89 | * by name | |
90 | */ | |
91 | pass1() | |
92 | { | |
93 | register i; | |
94 | struct dinode *ip; | |
95 | int putdir(), null(); | |
96 | ||
97 | while (gethead(&spcl) == 0) { | |
98 | printf("Can't find directory header!\n"); | |
99 | } | |
100 | for (;;) { | |
101 | if (checktype(&spcl, TS_BITS) == 1) { | |
102 | readbits(dumpmap); | |
103 | continue; | |
104 | } | |
105 | if (checktype(&spcl, TS_CLRI) == 1) { | |
106 | readbits(clrimap); | |
107 | continue; | |
108 | } | |
109 | if (checktype(&spcl, TS_INODE) == 0) { | |
110 | finish: | |
111 | flsh(); | |
112 | close(mt); | |
113 | return; | |
114 | } | |
115 | ip = &spcl.c_dinode; | |
116 | i = ip->di_mode & IFMT; | |
117 | if (i != IFDIR) { | |
118 | goto finish; | |
119 | } | |
120 | inotab[ipos].t_ino = spcl.c_inumber; | |
121 | inotab[ipos++].t_seekpt = seekpt; | |
122 | getfile(spcl.c_inumber, putdir, null, spcl.c_dinode.di_size); | |
123 | putent("\000\000/"); | |
124 | } | |
125 | } | |
126 | ||
127 | printem(prefix, inum) | |
128 | char *prefix; | |
129 | ino_t inum; | |
130 | { | |
131 | struct direct dir; | |
132 | register int i; | |
133 | ||
134 | for (i = 0; i < MAXINO; i++) | |
135 | if (inotab[i].t_ino == inum) { | |
136 | goto found; | |
137 | } | |
138 | printf("PANIC - can't find directory %d\n", inum); | |
139 | return; | |
140 | found: | |
141 | mseek(inotab[i].t_seekpt); | |
142 | for (;;) { | |
143 | getent((char *) &dir); | |
144 | if (direq(dir.d_name, "/")) | |
145 | return; | |
146 | if (search(dir.d_ino) != 0 && direq(dir.d_name, ".") == 0 && direq(dir.d_name, "..") == 0) { | |
147 | int len; | |
148 | FILE *tdf; | |
149 | ||
150 | tdf = df; | |
151 | df = fopen(dirfile, "r"); | |
152 | len = strlen(prefix); | |
153 | strncat(prefix, dir.d_name, sizeof(dir.d_name)); | |
154 | strcat(prefix, "/"); | |
155 | printem(prefix, dir.d_ino); | |
156 | prefix[len] = '\0'; | |
157 | fclose(df); | |
158 | df = tdf; | |
159 | } | |
160 | else | |
161 | if (BIT(dir.d_ino, dumpmap)) | |
162 | printf("%5d %s%-.14s\n", dir.d_ino, prefix, dir.d_name); | |
163 | } | |
164 | } | |
165 | /* | |
166 | * Do the file extraction, calling the supplied functions | |
167 | * with the blocks | |
168 | */ | |
169 | getfile(n, f1, f2, size) | |
170 | ino_t n; | |
171 | int (*f2)(), (*f1)(); | |
172 | long size; | |
173 | { | |
174 | register i; | |
175 | struct spcl addrblock; | |
176 | char buf[BSIZE]; | |
177 | ||
178 | addrblock = spcl; | |
179 | goto start; | |
180 | for (;;) { | |
181 | if (gethead(&addrblock) == 0) { | |
182 | printf("Missing address (header) block\n"); | |
183 | goto eloop; | |
184 | } | |
185 | if (checktype(&addrblock, TS_ADDR) == 0) { | |
186 | spcl = addrblock; | |
187 | return; | |
188 | } | |
189 | start: | |
190 | for (i = 0; i < addrblock.c_count; i++) { | |
191 | if (addrblock.c_addr[i]) { | |
192 | readtape(buf); | |
193 | (*f1)(buf, size > BSIZE ? (long) BSIZE : size); | |
194 | } | |
195 | else { | |
196 | clearbuf(buf); | |
197 | (*f2)(buf, size > BSIZE ? (long) BSIZE : size); | |
198 | } | |
199 | if ((size -= BSIZE) <= 0) { | |
200 | eloop: | |
201 | while (gethead(&spcl) == 0) | |
202 | ; | |
203 | if (checktype(&spcl, TS_ADDR) == 1) | |
204 | goto eloop; | |
205 | return; | |
206 | } | |
207 | } | |
208 | } | |
209 | } | |
210 | ||
211 | /* | |
212 | * Do the tape i\/o, dealling with volume changes | |
213 | * etc.. | |
214 | */ | |
215 | readtape(b) | |
216 | char *b; | |
217 | { | |
218 | register i; | |
219 | struct spcl tmpbuf; | |
220 | ||
221 | if (bct >= NTREC) { | |
222 | for (i = 0; i < NTREC; i++) | |
223 | ((struct spcl *)&tbf[i*BSIZE])->c_magic = 0; | |
224 | bct = 0; | |
225 | if ((i = read(mt, tbf, NTREC*BSIZE)) < 0) { | |
226 | exit(1); | |
227 | } | |
228 | if (i == 0) { | |
229 | bct = NTREC + 1; | |
230 | volno++; | |
231 | loop: | |
232 | flsht(); | |
233 | close(mt); | |
234 | printf("Mount volume %d\n", volno); | |
235 | while (getchar() != '\n') | |
236 | ; | |
237 | if ((mt = open(magtape, 0)) == -1) { | |
238 | printf("Cannot open tape!\n"); | |
239 | } | |
240 | if (readhdr(&tmpbuf) == 0) { | |
241 | printf("Not a dump tape.Try again\n"); | |
242 | goto loop; | |
243 | } | |
244 | if (checkvol(&tmpbuf, volno) == 0) { | |
245 | printf("Wrong tape. Try again\n"); | |
246 | goto loop; | |
247 | } | |
248 | readtape(b); | |
249 | return; | |
250 | } | |
251 | } | |
252 | copy(&tbf[(bct++*BSIZE)], b, BSIZE); | |
253 | } | |
254 | ||
255 | flsht() | |
256 | { | |
257 | bct = NTREC+1; | |
258 | } | |
259 | ||
260 | copy(f, t, s) | |
261 | register char *f, *t; | |
262 | { | |
263 | register i; | |
264 | ||
265 | i = s; | |
266 | do | |
267 | *t++ = *f++; | |
268 | while (--i); | |
269 | } | |
270 | ||
271 | clearbuf(cp) | |
272 | register char *cp; | |
273 | { | |
274 | register i; | |
275 | ||
276 | i = BSIZE; | |
277 | do | |
278 | *cp++ = 0; | |
279 | while (--i); | |
280 | } | |
281 | ||
282 | /* | |
283 | * Put and get the directory entries from the compressed | |
284 | * directory file | |
285 | */ | |
286 | putent(cp) | |
287 | char *cp; | |
288 | { | |
289 | register i; | |
290 | ||
291 | for (i = 0; i < sizeof(ino_t); i++) | |
292 | writec(*cp++); | |
293 | for (i = 0; i < DIRSIZ; i++) { | |
294 | writec(*cp); | |
295 | if (*cp++ == 0) | |
296 | return; | |
297 | } | |
298 | return; | |
299 | } | |
300 | ||
301 | getent(bf) | |
302 | register char *bf; | |
303 | { | |
304 | register i; | |
305 | ||
306 | for (i = 0; i < sizeof(ino_t); i++) | |
307 | *bf++ = readc(); | |
308 | for (i = 0; i < DIRSIZ; i++) | |
309 | if ((*bf++ = readc()) == 0) | |
310 | return; | |
311 | return; | |
312 | } | |
313 | ||
314 | /* | |
315 | * read/write te directory file | |
316 | */ | |
317 | writec(c) | |
318 | char c; | |
319 | { | |
320 | seekpt++; | |
321 | fwrite(&c, 1, 1, df); | |
322 | } | |
323 | ||
324 | readc() | |
325 | { | |
326 | char c; | |
327 | ||
328 | fread(&c, 1, 1, df); | |
329 | return(c); | |
330 | } | |
331 | ||
332 | mseek(pt) | |
333 | daddr_t pt; | |
334 | { | |
335 | fseek(df, pt, 0); | |
336 | } | |
337 | ||
338 | flsh() | |
339 | { | |
340 | fflush(df); | |
341 | } | |
342 | ||
343 | /* | |
344 | * search the directory inode ino | |
345 | * looking for entry cp | |
346 | */ | |
347 | search(inum) | |
348 | ino_t inum; | |
349 | { | |
350 | register low, high, probe; | |
351 | ||
352 | low = 0; | |
353 | high = ipos-1; | |
354 | ||
355 | while (low != high) { | |
356 | probe = (high - low + 1)/2 + low; | |
357 | /* | |
358 | printf("low = %d, high = %d, probe = %d, ino = %d, inum = %d\n", low, high, probe, inum, inotab[probe].t_ino); | |
359 | */ | |
360 | if (inum >= inotab[probe].t_ino) | |
361 | low = probe; | |
362 | else | |
363 | high = probe - 1; | |
364 | } | |
365 | return(inum == inotab[low].t_ino); | |
366 | } | |
367 | ||
368 | direq(s1, s2) | |
369 | register char *s1, *s2; | |
370 | { | |
371 | register i; | |
372 | ||
373 | for (i = 0; i < DIRSIZ; i++) | |
374 | if (*s1++ == *s2) { | |
375 | if (*s2++ == 0) | |
376 | return(1); | |
377 | } else | |
378 | return(0); | |
379 | return(1); | |
380 | } | |
381 | ||
382 | /* | |
383 | * read the tape into buf, then return whether or | |
384 | * or not it is a header block. | |
385 | */ | |
386 | gethead(buf) | |
387 | struct spcl *buf; | |
388 | { | |
389 | readtape((char *)buf); | |
390 | if (buf->c_magic != MAGIC || checksum((int *) buf) == 0) | |
391 | return(0); | |
392 | return(1); | |
393 | } | |
394 | ||
395 | /* | |
396 | * return whether or not the buffer contains a header block | |
397 | */ | |
398 | checktype(b, t) | |
399 | struct spcl *b; | |
400 | int t; | |
401 | { | |
402 | return(b->c_type == t); | |
403 | } | |
404 | ||
405 | ||
406 | checksum(b) | |
407 | int *b; | |
408 | { | |
409 | register i, j; | |
410 | ||
411 | j = BSIZE/sizeof(int); | |
412 | i = 0; | |
413 | do | |
414 | i += *b++; | |
415 | while (--j); | |
416 | if (i != CHECKSUM) { | |
417 | printf("Checksum error %o\n", i); | |
418 | return(0); | |
419 | } | |
420 | return(1); | |
421 | } | |
422 | ||
423 | checkvol(b, t) | |
424 | struct spcl *b; | |
425 | int t; | |
426 | { | |
427 | if (b->c_volume == t) | |
428 | return(1); | |
429 | return(0); | |
430 | } | |
431 | ||
432 | readhdr(b) | |
433 | struct spcl *b; | |
434 | { | |
435 | if (gethead(b) == 0) | |
436 | return(0); | |
437 | if (checktype(b, TS_TAPE) == 0) | |
438 | return(0); | |
439 | return(1); | |
440 | } | |
441 | ||
442 | putdir(b) | |
443 | char *b; | |
444 | { | |
445 | register struct direct *dp; | |
446 | register i; | |
447 | ||
448 | for (dp = (struct direct *) b, i = 0; i < BSIZE; dp++, i += sizeof(*dp)) { | |
449 | if (dp->d_ino == 0) | |
450 | continue; | |
451 | putent((char *) dp); | |
452 | } | |
453 | } | |
454 | ||
455 | /* | |
456 | * read a bit mask from the tape into m. | |
457 | */ | |
458 | readbits(m) | |
459 | short *m; | |
460 | { | |
461 | register i; | |
462 | ||
463 | i = spcl.c_count; | |
464 | ||
465 | while (i--) { | |
466 | readtape((char *) m); | |
467 | m += (BSIZE/(MLEN/BITS)); | |
468 | } | |
469 | while (gethead(&spcl) == 0) | |
470 | ; | |
471 | } | |
472 | ||
473 | null() { ; } |