Contents of /tags/mkinitrd-6_2_1/busybox/util-linux/fsck_minix.c
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Sun May 30 12:16:23 2010 UTC (14 years, 4 months ago) by niro
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Sun May 30 12:16:23 2010 UTC (14 years, 4 months ago) by niro
File MIME type: text/plain
File size: 33058 byte(s)
tagged 'mkinitrd-6_2_1'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * fsck.c - a file system consistency checker for Linux. |
4 | * |
5 | * (C) 1991, 1992 Linus Torvalds. |
6 | * |
7 | * Licensed under GPLv2, see file LICENSE in this tarball for details. |
8 | */ |
9 | |
10 | /* |
11 | * 09.11.91 - made the first rudimentary functions |
12 | * |
13 | * 10.11.91 - updated, does checking, no repairs yet. |
14 | * Sent out to the mailing-list for testing. |
15 | * |
16 | * 14.11.91 - Testing seems to have gone well. Added some |
17 | * correction-code, and changed some functions. |
18 | * |
19 | * 15.11.91 - More correction code. Hopefully it notices most |
20 | * cases now, and tries to do something about them. |
21 | * |
22 | * 16.11.91 - More corrections (thanks to Mika Jalava). Most |
23 | * things seem to work now. Yeah, sure. |
24 | * |
25 | * |
26 | * 19.04.92 - Had to start over again from this old version, as a |
27 | * kernel bug ate my enhanced fsck in february. |
28 | * |
29 | * 28.02.93 - added support for different directory entry sizes.. |
30 | * |
31 | * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with |
32 | * superblock information |
33 | * |
34 | * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform |
35 | * to that required by fsutil |
36 | * |
37 | * Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu) |
38 | * Added support for file system valid flag. Also |
39 | * added program_version variable and output of |
40 | * program name and version number when program |
41 | * is executed. |
42 | * |
43 | * 30.10.94 - added support for v2 filesystem |
44 | * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de) |
45 | * |
46 | * 10.12.94 - added test to prevent checking of mounted fs adapted |
47 | * from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck |
48 | * program. (Daniel Quinlan, quinlan@yggdrasil.com) |
49 | * |
50 | * 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such |
51 | * for modern libcs (janl@math.uio.no, Nicolai Langfeldt) |
52 | * |
53 | * 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk |
54 | * (Russell King). He made them for ARM. It would seem |
55 | * that the ARM is powerful enough to do this in C whereas |
56 | * i386 and m64k must use assembly to get it fast >:-) |
57 | * This should make minix fsck system-independent. |
58 | * (janl@math.uio.no, Nicolai Langfeldt) |
59 | * |
60 | * 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler |
61 | * warnings. Added mc68k bitops from |
62 | * Joerg Dorchain <dorchain@mpi-sb.mpg.de>. |
63 | * |
64 | * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by |
65 | * Andreas Schwab. |
66 | * |
67 | * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org> |
68 | * - added Native Language Support |
69 | * |
70 | * |
71 | * I've had no time to add comments - hopefully the function names |
72 | * are comments enough. As with all file system checkers, this assumes |
73 | * the file system is quiescent - don't use it on a mounted device |
74 | * unless you can be sure nobody is writing to it (and remember that the |
75 | * kernel can write to it when it searches for files). |
76 | * |
77 | * Usage: fsck [-larvsm] device |
78 | * -l for a listing of all the filenames |
79 | * -a for automatic repairs (not implemented) |
80 | * -r for repairs (interactive) (not implemented) |
81 | * -v for verbose (tells how many files) |
82 | * -s for superblock info |
83 | * -m for minix-like "mode not cleared" warnings |
84 | * -f force filesystem check even if filesystem marked as valid |
85 | * |
86 | * The device may be a block device or a image of one, but this isn't |
87 | * enforced (but it's not much fun on a character device :-). |
88 | */ |
89 | |
90 | #include <mntent.h> |
91 | #include "libbb.h" |
92 | #include "minix.h" |
93 | |
94 | #ifndef BLKGETSIZE |
95 | #define BLKGETSIZE _IO(0x12,96) /* return device size */ |
96 | #endif |
97 | |
98 | struct BUG_bad_inode_size { |
99 | char BUG_bad_inode1_size[(INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1]; |
100 | #if ENABLE_FEATURE_MINIX2 |
101 | char BUG_bad_inode2_size[(INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1]; |
102 | #endif |
103 | }; |
104 | |
105 | enum { |
106 | #ifdef UNUSED |
107 | MINIX1_LINK_MAX = 250, |
108 | MINIX2_LINK_MAX = 65530, |
109 | MINIX_I_MAP_SLOTS = 8, |
110 | MINIX_Z_MAP_SLOTS = 64, |
111 | MINIX_V1 = 0x0001, /* original minix fs */ |
112 | MINIX_V2 = 0x0002, /* minix V2 fs */ |
113 | #endif |
114 | MINIX_NAME_MAX = 255, /* # chars in a file name */ |
115 | }; |
116 | |
117 | |
118 | #if !ENABLE_FEATURE_MINIX2 |
119 | enum { version2 = 0 }; |
120 | #endif |
121 | |
122 | enum { MAX_DEPTH = 32 }; |
123 | |
124 | enum { dev_fd = 3 }; |
125 | |
126 | struct globals { |
127 | #if ENABLE_FEATURE_MINIX2 |
128 | smallint version2; |
129 | #endif |
130 | smallint changed; /* is filesystem modified? */ |
131 | smallint errors_uncorrected; /* flag if some error was not corrected */ |
132 | smallint termios_set; |
133 | smallint dirsize; |
134 | smallint namelen; |
135 | const char *device_name; |
136 | int directory, regular, blockdev, chardev, links, symlinks, total; |
137 | char *inode_buffer; |
138 | |
139 | char *inode_map; |
140 | char *zone_map; |
141 | |
142 | unsigned char *inode_count; |
143 | unsigned char *zone_count; |
144 | |
145 | /* File-name data */ |
146 | int name_depth; |
147 | char *name_component[MAX_DEPTH+1]; |
148 | |
149 | /* Bigger stuff */ |
150 | struct termios sv_termios; |
151 | char superblock_buffer[BLOCK_SIZE]; |
152 | char add_zone_ind_blk[BLOCK_SIZE]; |
153 | char add_zone_dind_blk[BLOCK_SIZE]; |
154 | IF_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];) |
155 | char check_file_blk[BLOCK_SIZE]; |
156 | |
157 | /* File-name data */ |
158 | char current_name[MAX_DEPTH * MINIX_NAME_MAX]; |
159 | }; |
160 | |
161 | #define G (*ptr_to_globals) |
162 | #if ENABLE_FEATURE_MINIX2 |
163 | #define version2 (G.version2 ) |
164 | #endif |
165 | #define changed (G.changed ) |
166 | #define errors_uncorrected (G.errors_uncorrected ) |
167 | #define termios_set (G.termios_set ) |
168 | #define dirsize (G.dirsize ) |
169 | #define namelen (G.namelen ) |
170 | #define device_name (G.device_name ) |
171 | #define directory (G.directory ) |
172 | #define regular (G.regular ) |
173 | #define blockdev (G.blockdev ) |
174 | #define chardev (G.chardev ) |
175 | #define links (G.links ) |
176 | #define symlinks (G.symlinks ) |
177 | #define total (G.total ) |
178 | #define inode_buffer (G.inode_buffer ) |
179 | #define inode_map (G.inode_map ) |
180 | #define zone_map (G.zone_map ) |
181 | #define inode_count (G.inode_count ) |
182 | #define zone_count (G.zone_count ) |
183 | #define name_depth (G.name_depth ) |
184 | #define name_component (G.name_component ) |
185 | #define sv_termios (G.sv_termios ) |
186 | #define superblock_buffer (G.superblock_buffer ) |
187 | #define add_zone_ind_blk (G.add_zone_ind_blk ) |
188 | #define add_zone_dind_blk (G.add_zone_dind_blk ) |
189 | #define add_zone_tind_blk (G.add_zone_tind_blk ) |
190 | #define check_file_blk (G.check_file_blk ) |
191 | #define current_name (G.current_name ) |
192 | #define INIT_G() do { \ |
193 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ |
194 | dirsize = 16; \ |
195 | namelen = 14; \ |
196 | current_name[0] = '/'; \ |
197 | /*current_name[1] = '\0';*/ \ |
198 | name_component[0] = ¤t_name[0]; \ |
199 | } while (0) |
200 | |
201 | |
202 | #define OPTION_STR "larvsmf" |
203 | enum { |
204 | OPT_l = (1 << 0), |
205 | OPT_a = (1 << 1), |
206 | OPT_r = (1 << 2), |
207 | OPT_v = (1 << 3), |
208 | OPT_s = (1 << 4), |
209 | OPT_w = (1 << 5), |
210 | OPT_f = (1 << 6), |
211 | }; |
212 | #define OPT_list (option_mask32 & OPT_l) |
213 | #define OPT_automatic (option_mask32 & OPT_a) |
214 | #define OPT_repair (option_mask32 & OPT_r) |
215 | #define OPT_verbose (option_mask32 & OPT_v) |
216 | #define OPT_show (option_mask32 & OPT_s) |
217 | #define OPT_warn_mode (option_mask32 & OPT_w) |
218 | #define OPT_force (option_mask32 & OPT_f) |
219 | /* non-automatic repairs requested? */ |
220 | #define OPT_manual ((option_mask32 & (OPT_a|OPT_r)) == OPT_r) |
221 | |
222 | |
223 | #define Inode1 (((struct minix1_inode *) inode_buffer)-1) |
224 | #define Inode2 (((struct minix2_inode *) inode_buffer)-1) |
225 | |
226 | #define Super (*(struct minix_superblock *)(superblock_buffer)) |
227 | |
228 | #if ENABLE_FEATURE_MINIX2 |
229 | # define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones)) |
230 | #else |
231 | # define ZONES ((unsigned)(Super.s_nzones)) |
232 | #endif |
233 | #define INODES ((unsigned)Super.s_ninodes) |
234 | #define IMAPS ((unsigned)Super.s_imap_blocks) |
235 | #define ZMAPS ((unsigned)Super.s_zmap_blocks) |
236 | #define FIRSTZONE ((unsigned)Super.s_firstdatazone) |
237 | #define ZONESIZE ((unsigned)Super.s_log_zone_size) |
238 | #define MAXSIZE ((unsigned)Super.s_max_size) |
239 | #define MAGIC (Super.s_magic) |
240 | |
241 | /* gcc likes this more (code is smaller) than macro variant */ |
242 | static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n) |
243 | { |
244 | return (size + n-1) / n; |
245 | } |
246 | |
247 | #if !ENABLE_FEATURE_MINIX2 |
248 | #define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK) |
249 | #else |
250 | #define INODE_BLOCKS div_roundup(INODES, \ |
251 | (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK)) |
252 | #endif |
253 | |
254 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE) |
255 | #define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS) |
256 | |
257 | /* Before you ask "where they come from?": */ |
258 | /* setbit/clrbit are supplied by sys/param.h */ |
259 | |
260 | static int minix_bit(const char *a, unsigned i) |
261 | { |
262 | return (a[i >> 3] & (1<<(i & 7))); |
263 | } |
264 | |
265 | static void minix_setbit(char *a, unsigned i) |
266 | { |
267 | setbit(a, i); |
268 | changed = 1; |
269 | } |
270 | static void minix_clrbit(char *a, unsigned i) |
271 | { |
272 | clrbit(a, i); |
273 | changed = 1; |
274 | } |
275 | |
276 | /* Note: do not assume 0/1, it is 0/nonzero */ |
277 | #define zone_in_use(x) (minix_bit(zone_map,(x)-FIRSTZONE+1)) |
278 | #define inode_in_use(x) (minix_bit(inode_map,(x))) |
279 | |
280 | #define mark_inode(x) (minix_setbit(inode_map,(x))) |
281 | #define unmark_inode(x) (minix_clrbit(inode_map,(x))) |
282 | |
283 | #define mark_zone(x) (minix_setbit(zone_map,(x)-FIRSTZONE+1)) |
284 | #define unmark_zone(x) (minix_clrbit(zone_map,(x)-FIRSTZONE+1)) |
285 | |
286 | |
287 | static void recursive_check(unsigned ino); |
288 | #if ENABLE_FEATURE_MINIX2 |
289 | static void recursive_check2(unsigned ino); |
290 | #endif |
291 | |
292 | static void die(const char *str) NORETURN; |
293 | static void die(const char *str) |
294 | { |
295 | if (termios_set) |
296 | tcsetattr_stdin_TCSANOW(&sv_termios); |
297 | bb_error_msg_and_die("%s", str); |
298 | } |
299 | |
300 | static void push_filename(const char *name) |
301 | { |
302 | // /dir/dir/dir/file |
303 | // ^ ^ ^ |
304 | // [0] [1] [2] <-name_component[i] |
305 | if (name_depth < MAX_DEPTH) { |
306 | int len; |
307 | char *p = name_component[name_depth]; |
308 | *p++ = '/'; |
309 | len = sprintf(p, "%.*s", namelen, name); |
310 | name_component[name_depth + 1] = p + len; |
311 | } |
312 | name_depth++; |
313 | } |
314 | |
315 | static void pop_filename(void) |
316 | { |
317 | name_depth--; |
318 | if (name_depth < MAX_DEPTH) { |
319 | *name_component[name_depth] = '\0'; |
320 | if (!name_depth) { |
321 | current_name[0] = '/'; |
322 | current_name[1] = '\0'; |
323 | } |
324 | } |
325 | } |
326 | |
327 | static int ask(const char *string, int def) |
328 | { |
329 | int c; |
330 | |
331 | if (!OPT_repair) { |
332 | bb_putchar('\n'); |
333 | errors_uncorrected = 1; |
334 | return 0; |
335 | } |
336 | if (OPT_automatic) { |
337 | bb_putchar('\n'); |
338 | if (!def) |
339 | errors_uncorrected = 1; |
340 | return def; |
341 | } |
342 | printf(def ? "%s (y/n)? " : "%s (n/y)? ", string); |
343 | for (;;) { |
344 | fflush_all(); |
345 | c = getchar(); |
346 | if (c == EOF) { |
347 | if (!def) |
348 | errors_uncorrected = 1; |
349 | return def; |
350 | } |
351 | if (c == '\n') |
352 | break; |
353 | c |= 0x20; /* tolower */ |
354 | if (c == 'y') { |
355 | def = 1; |
356 | break; |
357 | } |
358 | if (c == 'n') { |
359 | def = 0; |
360 | break; |
361 | } |
362 | } |
363 | if (def) |
364 | printf("y\n"); |
365 | else { |
366 | printf("n\n"); |
367 | errors_uncorrected = 1; |
368 | } |
369 | return def; |
370 | } |
371 | |
372 | /* |
373 | * Make certain that we aren't checking a filesystem that is on a |
374 | * mounted partition. Code adapted from e2fsck, Copyright (C) 1993, |
375 | * 1994 Theodore Ts'o. Also licensed under GPL. |
376 | */ |
377 | static void check_mount(void) |
378 | { |
379 | if (find_mount_point(device_name, 0)) { |
380 | int cont; |
381 | #if ENABLE_FEATURE_MTAB_SUPPORT |
382 | /* |
383 | * If the root is mounted read-only, then /etc/mtab is |
384 | * probably not correct; so we won't issue a warning based on |
385 | * it. |
386 | */ |
387 | int fd = open(bb_path_mtab_file, O_RDWR); |
388 | |
389 | if (fd < 0 && errno == EROFS) |
390 | return; |
391 | close(fd); |
392 | #endif |
393 | printf("%s is mounted. ", device_name); |
394 | cont = 0; |
395 | if (isatty(0) && isatty(1)) |
396 | cont = ask("Do you really want to continue", 0); |
397 | if (!cont) { |
398 | printf("Check aborted\n"); |
399 | exit(EXIT_SUCCESS); |
400 | } |
401 | } |
402 | } |
403 | |
404 | /* |
405 | * check_zone_nr checks to see that *nr is a valid zone nr. If it |
406 | * isn't, it will possibly be repaired. Check_zone_nr sets *corrected |
407 | * if an error was corrected, and returns the zone (0 for no zone |
408 | * or a bad zone-number). |
409 | */ |
410 | static int check_zone_nr2(uint32_t *nr, smallint *corrected) |
411 | { |
412 | const char *msg; |
413 | if (!*nr) |
414 | return 0; |
415 | if (*nr < FIRSTZONE) |
416 | msg = "< FIRSTZONE"; |
417 | else if (*nr >= ZONES) |
418 | msg = ">= ZONES"; |
419 | else |
420 | return *nr; |
421 | printf("Zone nr %s in file '%s'. ", msg, current_name); |
422 | if (ask("Remove block", 1)) { |
423 | *nr = 0; |
424 | *corrected = 1; |
425 | } |
426 | return 0; |
427 | } |
428 | |
429 | static int check_zone_nr(uint16_t *nr, smallint *corrected) |
430 | { |
431 | uint32_t nr32 = *nr; |
432 | int r = check_zone_nr2(&nr32, corrected); |
433 | *nr = (uint16_t)nr32; |
434 | return r; |
435 | } |
436 | |
437 | /* |
438 | * read-block reads block nr into the buffer at addr. |
439 | */ |
440 | static void read_block(unsigned nr, void *addr) |
441 | { |
442 | if (!nr) { |
443 | memset(addr, 0, BLOCK_SIZE); |
444 | return; |
445 | } |
446 | xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET); |
447 | if (BLOCK_SIZE != full_read(dev_fd, addr, BLOCK_SIZE)) { |
448 | printf("%s: bad block %u in file '%s'\n", |
449 | bb_msg_read_error, nr, current_name); |
450 | errors_uncorrected = 1; |
451 | memset(addr, 0, BLOCK_SIZE); |
452 | } |
453 | } |
454 | |
455 | /* |
456 | * write_block writes block nr to disk. |
457 | */ |
458 | static void write_block(unsigned nr, void *addr) |
459 | { |
460 | if (!nr) |
461 | return; |
462 | if (nr < FIRSTZONE || nr >= ZONES) { |
463 | printf("Internal error: trying to write bad block\n" |
464 | "Write request ignored\n"); |
465 | errors_uncorrected = 1; |
466 | return; |
467 | } |
468 | xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET); |
469 | if (BLOCK_SIZE != full_write(dev_fd, addr, BLOCK_SIZE)) { |
470 | printf("%s: bad block %u in file '%s'\n", |
471 | bb_msg_write_error, nr, current_name); |
472 | errors_uncorrected = 1; |
473 | } |
474 | } |
475 | |
476 | /* |
477 | * map_block calculates the absolute block nr of a block in a file. |
478 | * It sets 'changed' if the inode has needed changing, and re-writes |
479 | * any indirect blocks with errors. |
480 | */ |
481 | static int map_block(struct minix1_inode *inode, unsigned blknr) |
482 | { |
483 | uint16_t ind[BLOCK_SIZE >> 1]; |
484 | int block, result; |
485 | smallint blk_chg; |
486 | |
487 | if (blknr < 7) |
488 | return check_zone_nr(inode->i_zone + blknr, &changed); |
489 | blknr -= 7; |
490 | if (blknr < 512) { |
491 | block = check_zone_nr(inode->i_zone + 7, &changed); |
492 | goto common; |
493 | } |
494 | blknr -= 512; |
495 | block = check_zone_nr(inode->i_zone + 8, &changed); |
496 | read_block(block, ind); /* double indirect */ |
497 | blk_chg = 0; |
498 | result = check_zone_nr(&ind[blknr / 512], &blk_chg); |
499 | if (blk_chg) |
500 | write_block(block, ind); |
501 | block = result; |
502 | common: |
503 | read_block(block, ind); |
504 | blk_chg = 0; |
505 | result = check_zone_nr(&ind[blknr % 512], &blk_chg); |
506 | if (blk_chg) |
507 | write_block(block, ind); |
508 | return result; |
509 | } |
510 | |
511 | #if ENABLE_FEATURE_MINIX2 |
512 | static int map_block2(struct minix2_inode *inode, unsigned blknr) |
513 | { |
514 | uint32_t ind[BLOCK_SIZE >> 2]; |
515 | int block, result; |
516 | smallint blk_chg; |
517 | |
518 | if (blknr < 7) |
519 | return check_zone_nr2(inode->i_zone + blknr, &changed); |
520 | blknr -= 7; |
521 | if (blknr < 256) { |
522 | block = check_zone_nr2(inode->i_zone + 7, &changed); |
523 | goto common2; |
524 | } |
525 | blknr -= 256; |
526 | if (blknr < 256 * 256) { |
527 | block = check_zone_nr2(inode->i_zone + 8, &changed); |
528 | goto common1; |
529 | } |
530 | blknr -= 256 * 256; |
531 | block = check_zone_nr2(inode->i_zone + 9, &changed); |
532 | read_block(block, ind); /* triple indirect */ |
533 | blk_chg = 0; |
534 | result = check_zone_nr2(&ind[blknr / (256 * 256)], &blk_chg); |
535 | if (blk_chg) |
536 | write_block(block, ind); |
537 | block = result; |
538 | common1: |
539 | read_block(block, ind); /* double indirect */ |
540 | blk_chg = 0; |
541 | result = check_zone_nr2(&ind[(blknr / 256) % 256], &blk_chg); |
542 | if (blk_chg) |
543 | write_block(block, ind); |
544 | block = result; |
545 | common2: |
546 | read_block(block, ind); |
547 | blk_chg = 0; |
548 | result = check_zone_nr2(&ind[blknr % 256], &blk_chg); |
549 | if (blk_chg) |
550 | write_block(block, ind); |
551 | return result; |
552 | } |
553 | #endif |
554 | |
555 | static void write_superblock(void) |
556 | { |
557 | /* |
558 | * Set the state of the filesystem based on whether or not there |
559 | * are uncorrected errors. The filesystem valid flag is |
560 | * unconditionally set if we get this far. |
561 | */ |
562 | Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS; |
563 | if (!errors_uncorrected) |
564 | Super.s_state &= ~MINIX_ERROR_FS; |
565 | |
566 | xlseek(dev_fd, BLOCK_SIZE, SEEK_SET); |
567 | if (BLOCK_SIZE != full_write(dev_fd, superblock_buffer, BLOCK_SIZE)) |
568 | die("can't write superblock"); |
569 | } |
570 | |
571 | static void write_tables(void) |
572 | { |
573 | write_superblock(); |
574 | |
575 | if (IMAPS * BLOCK_SIZE != write(dev_fd, inode_map, IMAPS * BLOCK_SIZE)) |
576 | die("can't write inode map"); |
577 | if (ZMAPS * BLOCK_SIZE != write(dev_fd, zone_map, ZMAPS * BLOCK_SIZE)) |
578 | die("can't write zone map"); |
579 | if (INODE_BUFFER_SIZE != write(dev_fd, inode_buffer, INODE_BUFFER_SIZE)) |
580 | die("can't write inodes"); |
581 | } |
582 | |
583 | static void get_dirsize(void) |
584 | { |
585 | int block; |
586 | char blk[BLOCK_SIZE]; |
587 | int size; |
588 | |
589 | #if ENABLE_FEATURE_MINIX2 |
590 | if (version2) |
591 | block = Inode2[MINIX_ROOT_INO].i_zone[0]; |
592 | else |
593 | #endif |
594 | block = Inode1[MINIX_ROOT_INO].i_zone[0]; |
595 | read_block(block, blk); |
596 | for (size = 16; size < BLOCK_SIZE; size <<= 1) { |
597 | if (strcmp(blk + size + 2, "..") == 0) { |
598 | dirsize = size; |
599 | namelen = size - 2; |
600 | return; |
601 | } |
602 | } |
603 | /* use defaults */ |
604 | } |
605 | |
606 | static void read_superblock(void) |
607 | { |
608 | xlseek(dev_fd, BLOCK_SIZE, SEEK_SET); |
609 | if (BLOCK_SIZE != full_read(dev_fd, superblock_buffer, BLOCK_SIZE)) |
610 | die("can't read superblock"); |
611 | /* already initialized to: |
612 | namelen = 14; |
613 | dirsize = 16; |
614 | version2 = 0; |
615 | */ |
616 | if (MAGIC == MINIX1_SUPER_MAGIC) { |
617 | } else if (MAGIC == MINIX1_SUPER_MAGIC2) { |
618 | namelen = 30; |
619 | dirsize = 32; |
620 | #if ENABLE_FEATURE_MINIX2 |
621 | } else if (MAGIC == MINIX2_SUPER_MAGIC) { |
622 | version2 = 1; |
623 | } else if (MAGIC == MINIX2_SUPER_MAGIC2) { |
624 | namelen = 30; |
625 | dirsize = 32; |
626 | version2 = 1; |
627 | #endif |
628 | } else |
629 | die("bad magic number in superblock"); |
630 | if (ZONESIZE != 0 || BLOCK_SIZE != 1024) |
631 | die("only 1k blocks/zones supported"); |
632 | if (IMAPS * BLOCK_SIZE * 8 < INODES + 1) |
633 | die("bad s_imap_blocks field in superblock"); |
634 | if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1) |
635 | die("bad s_zmap_blocks field in superblock"); |
636 | } |
637 | |
638 | static void read_tables(void) |
639 | { |
640 | inode_map = xzalloc(IMAPS * BLOCK_SIZE); |
641 | zone_map = xzalloc(ZMAPS * BLOCK_SIZE); |
642 | inode_buffer = xmalloc(INODE_BUFFER_SIZE); |
643 | inode_count = xmalloc(INODES + 1); |
644 | zone_count = xmalloc(ZONES); |
645 | if (IMAPS * BLOCK_SIZE != read(dev_fd, inode_map, IMAPS * BLOCK_SIZE)) |
646 | die("can't read inode map"); |
647 | if (ZMAPS * BLOCK_SIZE != read(dev_fd, zone_map, ZMAPS * BLOCK_SIZE)) |
648 | die("can't read zone map"); |
649 | if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE)) |
650 | die("can't read inodes"); |
651 | if (NORM_FIRSTZONE != FIRSTZONE) { |
652 | printf("warning: firstzone!=norm_firstzone\n"); |
653 | errors_uncorrected = 1; |
654 | } |
655 | get_dirsize(); |
656 | if (OPT_show) { |
657 | printf("%u inodes\n" |
658 | "%u blocks\n" |
659 | "Firstdatazone=%u (%u)\n" |
660 | "Zonesize=%u\n" |
661 | "Maxsize=%u\n" |
662 | "Filesystem state=%u\n" |
663 | "namelen=%u\n\n", |
664 | INODES, |
665 | ZONES, |
666 | FIRSTZONE, NORM_FIRSTZONE, |
667 | BLOCK_SIZE << ZONESIZE, |
668 | MAXSIZE, |
669 | Super.s_state, |
670 | namelen); |
671 | } |
672 | } |
673 | |
674 | static void get_inode_common(unsigned nr, uint16_t i_mode) |
675 | { |
676 | total++; |
677 | if (!inode_count[nr]) { |
678 | if (!inode_in_use(nr)) { |
679 | printf("Inode %d is marked as 'unused', but it is used " |
680 | "for file '%s'\n", nr, current_name); |
681 | if (OPT_repair) { |
682 | if (ask("Mark as 'in use'", 1)) |
683 | mark_inode(nr); |
684 | else |
685 | errors_uncorrected = 1; |
686 | } |
687 | } |
688 | if (S_ISDIR(i_mode)) |
689 | directory++; |
690 | else if (S_ISREG(i_mode)) |
691 | regular++; |
692 | else if (S_ISCHR(i_mode)) |
693 | chardev++; |
694 | else if (S_ISBLK(i_mode)) |
695 | blockdev++; |
696 | else if (S_ISLNK(i_mode)) |
697 | symlinks++; |
698 | else if (S_ISSOCK(i_mode)); |
699 | else if (S_ISFIFO(i_mode)); |
700 | else { |
701 | printf("%s has mode %05o\n", current_name, i_mode); |
702 | } |
703 | } else |
704 | links++; |
705 | if (!++inode_count[nr]) { |
706 | printf("Warning: inode count too big\n"); |
707 | inode_count[nr]--; |
708 | errors_uncorrected = 1; |
709 | } |
710 | } |
711 | |
712 | static struct minix1_inode *get_inode(unsigned nr) |
713 | { |
714 | struct minix1_inode *inode; |
715 | |
716 | if (!nr || nr > INODES) |
717 | return NULL; |
718 | inode = Inode1 + nr; |
719 | get_inode_common(nr, inode->i_mode); |
720 | return inode; |
721 | } |
722 | |
723 | #if ENABLE_FEATURE_MINIX2 |
724 | static struct minix2_inode *get_inode2(unsigned nr) |
725 | { |
726 | struct minix2_inode *inode; |
727 | |
728 | if (!nr || nr > INODES) |
729 | return NULL; |
730 | inode = Inode2 + nr; |
731 | get_inode_common(nr, inode->i_mode); |
732 | return inode; |
733 | } |
734 | #endif |
735 | |
736 | static void check_root(void) |
737 | { |
738 | struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO; |
739 | |
740 | if (!inode || !S_ISDIR(inode->i_mode)) |
741 | die("root inode isn't a directory"); |
742 | } |
743 | |
744 | #if ENABLE_FEATURE_MINIX2 |
745 | static void check_root2(void) |
746 | { |
747 | struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO; |
748 | |
749 | if (!inode || !S_ISDIR(inode->i_mode)) |
750 | die("root inode isn't a directory"); |
751 | } |
752 | #else |
753 | void check_root2(void); |
754 | #endif |
755 | |
756 | static int add_zone_common(int block, smallint *corrected) |
757 | { |
758 | if (!block) |
759 | return 0; |
760 | if (zone_count[block]) { |
761 | printf("Already used block is reused in file '%s'. ", |
762 | current_name); |
763 | if (ask("Clear", 1)) { |
764 | block = 0; |
765 | *corrected = 1; |
766 | return -1; /* "please zero out *znr" */ |
767 | } |
768 | } |
769 | if (!zone_in_use(block)) { |
770 | printf("Block %d in file '%s' is marked as 'unused'. ", |
771 | block, current_name); |
772 | if (ask("Correct", 1)) |
773 | mark_zone(block); |
774 | } |
775 | if (!++zone_count[block]) |
776 | zone_count[block]--; |
777 | return block; |
778 | } |
779 | |
780 | static int add_zone(uint16_t *znr, smallint *corrected) |
781 | { |
782 | int block; |
783 | |
784 | block = check_zone_nr(znr, corrected); |
785 | block = add_zone_common(block, corrected); |
786 | if (block == -1) { |
787 | *znr = 0; |
788 | block = 0; |
789 | } |
790 | return block; |
791 | } |
792 | |
793 | #if ENABLE_FEATURE_MINIX2 |
794 | static int add_zone2(uint32_t *znr, smallint *corrected) |
795 | { |
796 | int block; |
797 | |
798 | block = check_zone_nr2(znr, corrected); |
799 | block = add_zone_common(block, corrected); |
800 | if (block == -1) { |
801 | *znr = 0; |
802 | block = 0; |
803 | } |
804 | return block; |
805 | } |
806 | #endif |
807 | |
808 | static void add_zone_ind(uint16_t *znr, smallint *corrected) |
809 | { |
810 | int i; |
811 | int block; |
812 | smallint chg_blk = 0; |
813 | |
814 | block = add_zone(znr, corrected); |
815 | if (!block) |
816 | return; |
817 | read_block(block, add_zone_ind_blk); |
818 | for (i = 0; i < (BLOCK_SIZE >> 1); i++) |
819 | add_zone(i + (uint16_t *) add_zone_ind_blk, &chg_blk); |
820 | if (chg_blk) |
821 | write_block(block, add_zone_ind_blk); |
822 | } |
823 | |
824 | #if ENABLE_FEATURE_MINIX2 |
825 | static void add_zone_ind2(uint32_t *znr, smallint *corrected) |
826 | { |
827 | int i; |
828 | int block; |
829 | smallint chg_blk = 0; |
830 | |
831 | block = add_zone2(znr, corrected); |
832 | if (!block) |
833 | return; |
834 | read_block(block, add_zone_ind_blk); |
835 | for (i = 0; i < BLOCK_SIZE >> 2; i++) |
836 | add_zone2(i + (uint32_t *) add_zone_ind_blk, &chg_blk); |
837 | if (chg_blk) |
838 | write_block(block, add_zone_ind_blk); |
839 | } |
840 | #endif |
841 | |
842 | static void add_zone_dind(uint16_t *znr, smallint *corrected) |
843 | { |
844 | int i; |
845 | int block; |
846 | smallint chg_blk = 0; |
847 | |
848 | block = add_zone(znr, corrected); |
849 | if (!block) |
850 | return; |
851 | read_block(block, add_zone_dind_blk); |
852 | for (i = 0; i < (BLOCK_SIZE >> 1); i++) |
853 | add_zone_ind(i + (uint16_t *) add_zone_dind_blk, &chg_blk); |
854 | if (chg_blk) |
855 | write_block(block, add_zone_dind_blk); |
856 | } |
857 | |
858 | #if ENABLE_FEATURE_MINIX2 |
859 | static void add_zone_dind2(uint32_t *znr, smallint *corrected) |
860 | { |
861 | int i; |
862 | int block; |
863 | smallint chg_blk = 0; |
864 | |
865 | block = add_zone2(znr, corrected); |
866 | if (!block) |
867 | return; |
868 | read_block(block, add_zone_dind_blk); |
869 | for (i = 0; i < BLOCK_SIZE >> 2; i++) |
870 | add_zone_ind2(i + (uint32_t *) add_zone_dind_blk, &chg_blk); |
871 | if (chg_blk) |
872 | write_block(block, add_zone_dind_blk); |
873 | } |
874 | |
875 | static void add_zone_tind2(uint32_t *znr, smallint *corrected) |
876 | { |
877 | int i; |
878 | int block; |
879 | smallint chg_blk = 0; |
880 | |
881 | block = add_zone2(znr, corrected); |
882 | if (!block) |
883 | return; |
884 | read_block(block, add_zone_tind_blk); |
885 | for (i = 0; i < BLOCK_SIZE >> 2; i++) |
886 | add_zone_dind2(i + (uint32_t *) add_zone_tind_blk, &chg_blk); |
887 | if (chg_blk) |
888 | write_block(block, add_zone_tind_blk); |
889 | } |
890 | #endif |
891 | |
892 | static void check_zones(unsigned i) |
893 | { |
894 | struct minix1_inode *inode; |
895 | |
896 | if (!i || i > INODES) |
897 | return; |
898 | if (inode_count[i] > 1) /* have we counted this file already? */ |
899 | return; |
900 | inode = Inode1 + i; |
901 | if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) && |
902 | !S_ISLNK(inode->i_mode)) return; |
903 | for (i = 0; i < 7; i++) |
904 | add_zone(i + inode->i_zone, &changed); |
905 | add_zone_ind(7 + inode->i_zone, &changed); |
906 | add_zone_dind(8 + inode->i_zone, &changed); |
907 | } |
908 | |
909 | #if ENABLE_FEATURE_MINIX2 |
910 | static void check_zones2(unsigned i) |
911 | { |
912 | struct minix2_inode *inode; |
913 | |
914 | if (!i || i > INODES) |
915 | return; |
916 | if (inode_count[i] > 1) /* have we counted this file already? */ |
917 | return; |
918 | inode = Inode2 + i; |
919 | if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) |
920 | && !S_ISLNK(inode->i_mode)) |
921 | return; |
922 | for (i = 0; i < 7; i++) |
923 | add_zone2(i + inode->i_zone, &changed); |
924 | add_zone_ind2(7 + inode->i_zone, &changed); |
925 | add_zone_dind2(8 + inode->i_zone, &changed); |
926 | add_zone_tind2(9 + inode->i_zone, &changed); |
927 | } |
928 | #endif |
929 | |
930 | static void check_file(struct minix1_inode *dir, unsigned offset) |
931 | { |
932 | struct minix1_inode *inode; |
933 | int ino; |
934 | char *name; |
935 | int block; |
936 | |
937 | block = map_block(dir, offset / BLOCK_SIZE); |
938 | read_block(block, check_file_blk); |
939 | name = check_file_blk + (offset % BLOCK_SIZE) + 2; |
940 | ino = *(uint16_t *) (name - 2); |
941 | if (ino > INODES) { |
942 | printf("%s contains a bad inode number for file '%.*s'. ", |
943 | current_name, namelen, name); |
944 | if (ask("Remove", 1)) { |
945 | *(uint16_t *) (name - 2) = 0; |
946 | write_block(block, check_file_blk); |
947 | } |
948 | ino = 0; |
949 | } |
950 | push_filename(name); |
951 | inode = get_inode(ino); |
952 | pop_filename(); |
953 | if (!offset) { |
954 | if (inode && LONE_CHAR(name, '.')) |
955 | return; |
956 | printf("%s: bad directory: '.' isn't first\n", current_name); |
957 | errors_uncorrected = 1; |
958 | } |
959 | if (offset == dirsize) { |
960 | if (inode && strcmp("..", name) == 0) |
961 | return; |
962 | printf("%s: bad directory: '..' isn't second\n", current_name); |
963 | errors_uncorrected = 1; |
964 | } |
965 | if (!inode) |
966 | return; |
967 | push_filename(name); |
968 | if (OPT_list) { |
969 | if (OPT_verbose) |
970 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks); |
971 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : ""); |
972 | } |
973 | check_zones(ino); |
974 | if (inode && S_ISDIR(inode->i_mode)) |
975 | recursive_check(ino); |
976 | pop_filename(); |
977 | } |
978 | |
979 | #if ENABLE_FEATURE_MINIX2 |
980 | static void check_file2(struct minix2_inode *dir, unsigned offset) |
981 | { |
982 | struct minix2_inode *inode; |
983 | int ino; |
984 | char *name; |
985 | int block; |
986 | |
987 | block = map_block2(dir, offset / BLOCK_SIZE); |
988 | read_block(block, check_file_blk); |
989 | name = check_file_blk + (offset % BLOCK_SIZE) + 2; |
990 | ino = *(uint16_t *) (name - 2); |
991 | if (ino > INODES) { |
992 | printf("%s contains a bad inode number for file '%.*s'. ", |
993 | current_name, namelen, name); |
994 | if (ask("Remove", 1)) { |
995 | *(uint16_t *) (name - 2) = 0; |
996 | write_block(block, check_file_blk); |
997 | } |
998 | ino = 0; |
999 | } |
1000 | push_filename(name); |
1001 | inode = get_inode2(ino); |
1002 | pop_filename(); |
1003 | if (!offset) { |
1004 | if (inode && LONE_CHAR(name, '.')) |
1005 | return; |
1006 | printf("%s: bad directory: '.' isn't first\n", current_name); |
1007 | errors_uncorrected = 1; |
1008 | } |
1009 | if (offset == dirsize) { |
1010 | if (inode && strcmp("..", name) == 0) |
1011 | return; |
1012 | printf("%s: bad directory: '..' isn't second\n", current_name); |
1013 | errors_uncorrected = 1; |
1014 | } |
1015 | if (!inode) |
1016 | return; |
1017 | push_filename(name); |
1018 | if (OPT_list) { |
1019 | if (OPT_verbose) |
1020 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks); |
1021 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : ""); |
1022 | } |
1023 | check_zones2(ino); |
1024 | if (inode && S_ISDIR(inode->i_mode)) |
1025 | recursive_check2(ino); |
1026 | pop_filename(); |
1027 | } |
1028 | #endif |
1029 | |
1030 | static void recursive_check(unsigned ino) |
1031 | { |
1032 | struct minix1_inode *dir; |
1033 | unsigned offset; |
1034 | |
1035 | dir = Inode1 + ino; |
1036 | if (!S_ISDIR(dir->i_mode)) |
1037 | die("internal error"); |
1038 | if (dir->i_size < 2 * dirsize) { |
1039 | printf("%s: bad directory: size<32", current_name); |
1040 | errors_uncorrected = 1; |
1041 | } |
1042 | for (offset = 0; offset < dir->i_size; offset += dirsize) |
1043 | check_file(dir, offset); |
1044 | } |
1045 | |
1046 | #if ENABLE_FEATURE_MINIX2 |
1047 | static void recursive_check2(unsigned ino) |
1048 | { |
1049 | struct minix2_inode *dir; |
1050 | unsigned offset; |
1051 | |
1052 | dir = Inode2 + ino; |
1053 | if (!S_ISDIR(dir->i_mode)) |
1054 | die("internal error"); |
1055 | if (dir->i_size < 2 * dirsize) { |
1056 | printf("%s: bad directory: size<32", current_name); |
1057 | errors_uncorrected = 1; |
1058 | } |
1059 | for (offset = 0; offset < dir->i_size; offset += dirsize) |
1060 | check_file2(dir, offset); |
1061 | } |
1062 | #endif |
1063 | |
1064 | static int bad_zone(int i) |
1065 | { |
1066 | char buffer[BLOCK_SIZE]; |
1067 | |
1068 | xlseek(dev_fd, BLOCK_SIZE * i, SEEK_SET); |
1069 | return (BLOCK_SIZE != full_read(dev_fd, buffer, BLOCK_SIZE)); |
1070 | } |
1071 | |
1072 | static void check_counts(void) |
1073 | { |
1074 | int i; |
1075 | |
1076 | for (i = 1; i <= INODES; i++) { |
1077 | if (OPT_warn_mode && Inode1[i].i_mode && !inode_in_use(i)) { |
1078 | printf("Inode %d has non-zero mode. ", i); |
1079 | if (ask("Clear", 1)) { |
1080 | Inode1[i].i_mode = 0; |
1081 | changed = 1; |
1082 | } |
1083 | } |
1084 | if (!inode_count[i]) { |
1085 | if (!inode_in_use(i)) |
1086 | continue; |
1087 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i); |
1088 | if (ask("Clear", 1)) |
1089 | unmark_inode(i); |
1090 | continue; |
1091 | } |
1092 | if (!inode_in_use(i)) { |
1093 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i); |
1094 | if (ask("Set", 1)) |
1095 | mark_inode(i); |
1096 | } |
1097 | if (Inode1[i].i_nlinks != inode_count[i]) { |
1098 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ", |
1099 | i, Inode1[i].i_mode, Inode1[i].i_nlinks, |
1100 | inode_count[i]); |
1101 | if (ask("Set i_nlinks to count", 1)) { |
1102 | Inode1[i].i_nlinks = inode_count[i]; |
1103 | changed = 1; |
1104 | } |
1105 | } |
1106 | } |
1107 | for (i = FIRSTZONE; i < ZONES; i++) { |
1108 | if ((zone_in_use(i) != 0) == zone_count[i]) |
1109 | continue; |
1110 | if (!zone_count[i]) { |
1111 | if (bad_zone(i)) |
1112 | continue; |
1113 | printf("Zone %d is marked 'in use', but no file uses it. ", i); |
1114 | if (ask("Unmark", 1)) |
1115 | unmark_zone(i); |
1116 | continue; |
1117 | } |
1118 | printf("Zone %d: %sin use, counted=%d\n", |
1119 | i, zone_in_use(i) ? "" : "not ", zone_count[i]); |
1120 | } |
1121 | } |
1122 | |
1123 | #if ENABLE_FEATURE_MINIX2 |
1124 | static void check_counts2(void) |
1125 | { |
1126 | int i; |
1127 | |
1128 | for (i = 1; i <= INODES; i++) { |
1129 | if (OPT_warn_mode && Inode2[i].i_mode && !inode_in_use(i)) { |
1130 | printf("Inode %d has non-zero mode. ", i); |
1131 | if (ask("Clear", 1)) { |
1132 | Inode2[i].i_mode = 0; |
1133 | changed = 1; |
1134 | } |
1135 | } |
1136 | if (!inode_count[i]) { |
1137 | if (!inode_in_use(i)) |
1138 | continue; |
1139 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i); |
1140 | if (ask("Clear", 1)) |
1141 | unmark_inode(i); |
1142 | continue; |
1143 | } |
1144 | if (!inode_in_use(i)) { |
1145 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i); |
1146 | if (ask("Set", 1)) |
1147 | mark_inode(i); |
1148 | } |
1149 | if (Inode2[i].i_nlinks != inode_count[i]) { |
1150 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ", |
1151 | i, Inode2[i].i_mode, Inode2[i].i_nlinks, |
1152 | inode_count[i]); |
1153 | if (ask("Set i_nlinks to count", 1)) { |
1154 | Inode2[i].i_nlinks = inode_count[i]; |
1155 | changed = 1; |
1156 | } |
1157 | } |
1158 | } |
1159 | for (i = FIRSTZONE; i < ZONES; i++) { |
1160 | if ((zone_in_use(i) != 0) == zone_count[i]) |
1161 | continue; |
1162 | if (!zone_count[i]) { |
1163 | if (bad_zone(i)) |
1164 | continue; |
1165 | printf("Zone %d is marked 'in use', but no file uses it. ", i); |
1166 | if (ask("Unmark", 1)) |
1167 | unmark_zone(i); |
1168 | continue; |
1169 | } |
1170 | printf("Zone %d: %sin use, counted=%d\n", |
1171 | i, zone_in_use(i) ? "" : "not ", zone_count[i]); |
1172 | } |
1173 | } |
1174 | #endif |
1175 | |
1176 | static void check(void) |
1177 | { |
1178 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count)); |
1179 | memset(zone_count, 0, ZONES * sizeof(*zone_count)); |
1180 | check_zones(MINIX_ROOT_INO); |
1181 | recursive_check(MINIX_ROOT_INO); |
1182 | check_counts(); |
1183 | } |
1184 | |
1185 | #if ENABLE_FEATURE_MINIX2 |
1186 | static void check2(void) |
1187 | { |
1188 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count)); |
1189 | memset(zone_count, 0, ZONES * sizeof(*zone_count)); |
1190 | check_zones2(MINIX_ROOT_INO); |
1191 | recursive_check2(MINIX_ROOT_INO); |
1192 | check_counts2(); |
1193 | } |
1194 | #else |
1195 | void check2(void); |
1196 | #endif |
1197 | |
1198 | int fsck_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
1199 | int fsck_minix_main(int argc UNUSED_PARAM, char **argv) |
1200 | { |
1201 | struct termios tmp; |
1202 | int retcode = 0; |
1203 | |
1204 | xfunc_error_retval = 8; |
1205 | |
1206 | INIT_G(); |
1207 | |
1208 | opt_complementary = "=1:ar"; /* one argument; -a assumes -r */ |
1209 | getopt32(argv, OPTION_STR); |
1210 | argv += optind; |
1211 | device_name = argv[0]; |
1212 | |
1213 | check_mount(); /* trying to check a mounted filesystem? */ |
1214 | if (OPT_manual) { |
1215 | if (!isatty(0) || !isatty(1)) |
1216 | die("need terminal for interactive repairs"); |
1217 | } |
1218 | xmove_fd(xopen(device_name, OPT_repair ? O_RDWR : O_RDONLY), dev_fd); |
1219 | |
1220 | /*sync(); paranoia? */ |
1221 | read_superblock(); |
1222 | |
1223 | /* |
1224 | * Determine whether or not we should continue with the checking. |
1225 | * This is based on the status of the filesystem valid and error |
1226 | * flags and whether or not the -f switch was specified on the |
1227 | * command line. |
1228 | */ |
1229 | printf("%s: %s\n", applet_name, bb_banner); |
1230 | |
1231 | if (!(Super.s_state & MINIX_ERROR_FS) |
1232 | && (Super.s_state & MINIX_VALID_FS) && !OPT_force |
1233 | ) { |
1234 | if (OPT_repair) |
1235 | printf("%s is clean, check is skipped\n", device_name); |
1236 | return 0; |
1237 | } else if (OPT_force) |
1238 | printf("Forcing filesystem check on %s\n", device_name); |
1239 | else if (OPT_repair) |
1240 | printf("Filesystem on %s is dirty, needs checking\n", |
1241 | device_name); |
1242 | |
1243 | read_tables(); |
1244 | |
1245 | if (OPT_manual) { |
1246 | tcgetattr(0, &sv_termios); |
1247 | tmp = sv_termios; |
1248 | tmp.c_lflag &= ~(ICANON | ECHO); |
1249 | tcsetattr_stdin_TCSANOW(&tmp); |
1250 | termios_set = 1; |
1251 | } |
1252 | |
1253 | if (version2) { |
1254 | check_root2(); |
1255 | check2(); |
1256 | } else { |
1257 | check_root(); |
1258 | check(); |
1259 | } |
1260 | |
1261 | if (OPT_verbose) { |
1262 | int i, free_cnt; |
1263 | |
1264 | for (i = 1, free_cnt = 0; i <= INODES; i++) |
1265 | if (!inode_in_use(i)) |
1266 | free_cnt++; |
1267 | printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt), |
1268 | 100 * (INODES - free_cnt) / INODES); |
1269 | for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++) |
1270 | if (!zone_in_use(i)) |
1271 | free_cnt++; |
1272 | printf("%6u zones used (%u%%)\n\n" |
1273 | "%6u regular files\n" |
1274 | "%6u directories\n" |
1275 | "%6u character device files\n" |
1276 | "%6u block device files\n" |
1277 | "%6u links\n" |
1278 | "%6u symbolic links\n" |
1279 | "------\n" |
1280 | "%6u files\n", |
1281 | (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES, |
1282 | regular, directory, chardev, blockdev, |
1283 | links - 2 * directory + 1, symlinks, |
1284 | total - 2 * directory + 1); |
1285 | } |
1286 | if (changed) { |
1287 | write_tables(); |
1288 | printf("FILE SYSTEM HAS BEEN CHANGED\n"); |
1289 | sync(); |
1290 | } else if (OPT_repair) |
1291 | write_superblock(); |
1292 | |
1293 | if (OPT_manual) |
1294 | tcsetattr_stdin_TCSANOW(&sv_termios); |
1295 | |
1296 | if (changed) |
1297 | retcode += 3; |
1298 | if (errors_uncorrected) |
1299 | retcode += 4; |
1300 | return retcode; |
1301 | } |