blob: 33767a1afe8f8939e237e8a3f0e426a8caeea3b3
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 source tree. |
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 | * 19.04.92 - Had to start over again from this old version, as a |
26 | * kernel bug ate my enhanced fsck in february. |
27 | * |
28 | * 28.02.93 - added support for different directory entry sizes.. |
29 | * |
30 | * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with |
31 | * superblock information |
32 | * |
33 | * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform |
34 | * to that required by fsutil |
35 | * |
36 | * Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu) |
37 | * Added support for file system valid flag. Also |
38 | * added program_version variable and output of |
39 | * program name and version number when program |
40 | * is executed. |
41 | * |
42 | * 30.10.94 - added support for v2 filesystem |
43 | * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de) |
44 | * |
45 | * 10.12.94 - added test to prevent checking of mounted fs adapted |
46 | * from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck |
47 | * program. (Daniel Quinlan, quinlan@yggdrasil.com) |
48 | * |
49 | * 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such |
50 | * for modern libcs (janl@math.uio.no, Nicolai Langfeldt) |
51 | * |
52 | * 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk |
53 | * (Russell King). He made them for ARM. It would seem |
54 | * that the ARM is powerful enough to do this in C whereas |
55 | * i386 and m64k must use assembly to get it fast >:-) |
56 | * This should make minix fsck system-independent. |
57 | * (janl@math.uio.no, Nicolai Langfeldt) |
58 | * |
59 | * 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler |
60 | * warnings. Added mc68k bitops from |
61 | * Joerg Dorchain <dorchain@mpi-sb.mpg.de>. |
62 | * |
63 | * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by |
64 | * Andreas Schwab. |
65 | * |
66 | * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org> |
67 | * - added Native Language Support |
68 | * |
69 | * |
70 | * I've had no time to add comments - hopefully the function names |
71 | * are comments enough. As with all file system checkers, this assumes |
72 | * the file system is quiescent - don't use it on a mounted device |
73 | * unless you can be sure nobody is writing to it (and remember that the |
74 | * kernel can write to it when it searches for files). |
75 | * |
76 | * Usage: fsck [-larvsm] device |
77 | * -l for a listing of all the filenames |
78 | * -a for automatic repairs (not implemented) |
79 | * -r for repairs (interactive) (not implemented) |
80 | * -v for verbose (tells how many files) |
81 | * -s for superblock info |
82 | * -m for minix-like "mode not cleared" warnings |
83 | * -f force filesystem check even if filesystem marked as valid |
84 | * |
85 | * The device may be a block device or a image of one, but this isn't |
86 | * enforced (but it's not much fun on a character device :-). |
87 | */ |
88 | |
89 | //usage:#define fsck_minix_trivial_usage |
90 | //usage: "[-larvsmf] BLOCKDEV" |
91 | //usage:#define fsck_minix_full_usage "\n\n" |
92 | //usage: "Check MINIX filesystem\n" |
93 | //usage: "\n -l List all filenames" |
94 | //usage: "\n -r Perform interactive repairs" |
95 | //usage: "\n -a Perform automatic repairs" |
96 | //usage: "\n -v Verbose" |
97 | //usage: "\n -s Output superblock information" |
98 | //usage: "\n -m Show \"mode not cleared\" warnings" |
99 | //usage: "\n -f Force file system check" |
100 | |
101 | #include <mntent.h> |
102 | #include "libbb.h" |
103 | #include "minix.h" |
104 | |
105 | #ifndef BLKGETSIZE |
106 | #define BLKGETSIZE _IO(0x12,96) /* return device size */ |
107 | #endif |
108 | |
109 | struct BUG_bad_inode_size { |
110 | char BUG_bad_inode1_size[(INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1]; |
111 | #if ENABLE_FEATURE_MINIX2 |
112 | char BUG_bad_inode2_size[(INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1]; |
113 | #endif |
114 | }; |
115 | |
116 | enum { |
117 | #ifdef UNUSED |
118 | MINIX1_LINK_MAX = 250, |
119 | MINIX2_LINK_MAX = 65530, |
120 | MINIX_I_MAP_SLOTS = 8, |
121 | MINIX_Z_MAP_SLOTS = 64, |
122 | MINIX_V1 = 0x0001, /* original minix fs */ |
123 | MINIX_V2 = 0x0002, /* minix V2 fs */ |
124 | #endif |
125 | MINIX_NAME_MAX = 255, /* # chars in a file name */ |
126 | }; |
127 | |
128 | |
129 | #if !ENABLE_FEATURE_MINIX2 |
130 | enum { version2 = 0 }; |
131 | #endif |
132 | |
133 | enum { MAX_DEPTH = 32 }; |
134 | |
135 | enum { dev_fd = 3 }; |
136 | |
137 | struct globals { |
138 | #if ENABLE_FEATURE_MINIX2 |
139 | smallint version2; |
140 | #endif |
141 | smallint changed; /* is filesystem modified? */ |
142 | smallint errors_uncorrected; /* flag if some error was not corrected */ |
143 | smallint termios_set; |
144 | smallint dirsize; |
145 | smallint namelen; |
146 | const char *device_name; |
147 | int directory, regular, blockdev, chardev, links, symlinks, total; |
148 | char *inode_buffer; |
149 | |
150 | char *inode_map; |
151 | char *zone_map; |
152 | |
153 | unsigned char *inode_count; |
154 | unsigned char *zone_count; |
155 | |
156 | /* File-name data */ |
157 | int name_depth; |
158 | char *name_component[MAX_DEPTH+1]; |
159 | |
160 | /* Bigger stuff */ |
161 | struct termios sv_termios; |
162 | char superblock_buffer[BLOCK_SIZE]; |
163 | char add_zone_ind_blk[BLOCK_SIZE]; |
164 | char add_zone_dind_blk[BLOCK_SIZE]; |
165 | IF_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];) |
166 | char check_file_blk[BLOCK_SIZE]; |
167 | |
168 | /* File-name data */ |
169 | char current_name[MAX_DEPTH * MINIX_NAME_MAX]; |
170 | }; |
171 | #define G (*ptr_to_globals) |
172 | #if ENABLE_FEATURE_MINIX2 |
173 | #define version2 (G.version2 ) |
174 | #endif |
175 | #define changed (G.changed ) |
176 | #define errors_uncorrected (G.errors_uncorrected ) |
177 | #define termios_set (G.termios_set ) |
178 | #define dirsize (G.dirsize ) |
179 | #define namelen (G.namelen ) |
180 | #define device_name (G.device_name ) |
181 | #define directory (G.directory ) |
182 | #define regular (G.regular ) |
183 | #define blockdev (G.blockdev ) |
184 | #define chardev (G.chardev ) |
185 | #define links (G.links ) |
186 | #define symlinks (G.symlinks ) |
187 | #define total (G.total ) |
188 | #define inode_buffer (G.inode_buffer ) |
189 | #define inode_map (G.inode_map ) |
190 | #define zone_map (G.zone_map ) |
191 | #define inode_count (G.inode_count ) |
192 | #define zone_count (G.zone_count ) |
193 | #define name_depth (G.name_depth ) |
194 | #define name_component (G.name_component ) |
195 | #define sv_termios (G.sv_termios ) |
196 | #define superblock_buffer (G.superblock_buffer ) |
197 | #define add_zone_ind_blk (G.add_zone_ind_blk ) |
198 | #define add_zone_dind_blk (G.add_zone_dind_blk ) |
199 | #define add_zone_tind_blk (G.add_zone_tind_blk ) |
200 | #define check_file_blk (G.check_file_blk ) |
201 | #define current_name (G.current_name ) |
202 | #define INIT_G() do { \ |
203 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ |
204 | dirsize = 16; \ |
205 | namelen = 14; \ |
206 | current_name[0] = '/'; \ |
207 | /*current_name[1] = '\0';*/ \ |
208 | name_component[0] = ¤t_name[0]; \ |
209 | } while (0) |
210 | |
211 | |
212 | #define OPTION_STR "larvsmf" |
213 | enum { |
214 | OPT_l = (1 << 0), |
215 | OPT_a = (1 << 1), |
216 | OPT_r = (1 << 2), |
217 | OPT_v = (1 << 3), |
218 | OPT_s = (1 << 4), |
219 | OPT_w = (1 << 5), |
220 | OPT_f = (1 << 6), |
221 | }; |
222 | #define OPT_list (option_mask32 & OPT_l) |
223 | #define OPT_automatic (option_mask32 & OPT_a) |
224 | #define OPT_repair (option_mask32 & OPT_r) |
225 | #define OPT_verbose (option_mask32 & OPT_v) |
226 | #define OPT_show (option_mask32 & OPT_s) |
227 | #define OPT_warn_mode (option_mask32 & OPT_w) |
228 | #define OPT_force (option_mask32 & OPT_f) |
229 | /* non-automatic repairs requested? */ |
230 | #define OPT_manual ((option_mask32 & (OPT_a|OPT_r)) == OPT_r) |
231 | |
232 | |
233 | #define Inode1 (((struct minix1_inode *) inode_buffer)-1) |
234 | #define Inode2 (((struct minix2_inode *) inode_buffer)-1) |
235 | |
236 | #define Super (*(struct minix_superblock *)(superblock_buffer)) |
237 | |
238 | #if ENABLE_FEATURE_MINIX2 |
239 | # define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones)) |
240 | #else |
241 | # define ZONES ((unsigned)(Super.s_nzones)) |
242 | #endif |
243 | #define INODES ((unsigned)Super.s_ninodes) |
244 | #define IMAPS ((unsigned)Super.s_imap_blocks) |
245 | #define ZMAPS ((unsigned)Super.s_zmap_blocks) |
246 | #define FIRSTZONE ((unsigned)Super.s_firstdatazone) |
247 | #define ZONESIZE ((unsigned)Super.s_log_zone_size) |
248 | #define MAXSIZE ((unsigned)Super.s_max_size) |
249 | #define MAGIC (Super.s_magic) |
250 | |
251 | /* gcc likes this more (code is smaller) than macro variant */ |
252 | static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n) |
253 | { |
254 | return (size + n-1) / n; |
255 | } |
256 | |
257 | #if !ENABLE_FEATURE_MINIX2 |
258 | #define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK) |
259 | #else |
260 | #define INODE_BLOCKS div_roundup(INODES, \ |
261 | (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK)) |
262 | #endif |
263 | |
264 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE) |
265 | #define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS) |
266 | |
267 | /* Before you ask "where they come from?": */ |
268 | /* setbit/clrbit are supplied by sys/param.h */ |
269 | |
270 | static int minix_bit(const char *a, unsigned i) |
271 | { |
272 | return (a[i >> 3] & (1<<(i & 7))); |
273 | } |
274 | |
275 | static void minix_setbit(char *a, unsigned i) |
276 | { |
277 | setbit(a, i); |
278 | changed = 1; |
279 | } |
280 | static void minix_clrbit(char *a, unsigned i) |
281 | { |
282 | clrbit(a, i); |
283 | changed = 1; |
284 | } |
285 | |
286 | /* Note: do not assume 0/1, it is 0/nonzero */ |
287 | #define zone_in_use(x) (minix_bit(zone_map,(x)-FIRSTZONE+1)) |
288 | #define inode_in_use(x) (minix_bit(inode_map,(x))) |
289 | |
290 | #define mark_inode(x) (minix_setbit(inode_map,(x))) |
291 | #define unmark_inode(x) (minix_clrbit(inode_map,(x))) |
292 | |
293 | #define mark_zone(x) (minix_setbit(zone_map,(x)-FIRSTZONE+1)) |
294 | #define unmark_zone(x) (minix_clrbit(zone_map,(x)-FIRSTZONE+1)) |
295 | |
296 | |
297 | static void recursive_check(unsigned ino); |
298 | #if ENABLE_FEATURE_MINIX2 |
299 | static void recursive_check2(unsigned ino); |
300 | #endif |
301 | |
302 | static void die(const char *str) NORETURN; |
303 | static void die(const char *str) |
304 | { |
305 | if (termios_set) |
306 | tcsetattr_stdin_TCSANOW(&sv_termios); |
307 | bb_error_msg_and_die("%s", str); |
308 | } |
309 | |
310 | static void push_filename(const char *name) |
311 | { |
312 | // /dir/dir/dir/file |
313 | // ^ ^ ^ |
314 | // [0] [1] [2] <-name_component[i] |
315 | if (name_depth < MAX_DEPTH) { |
316 | int len; |
317 | char *p = name_component[name_depth]; |
318 | *p++ = '/'; |
319 | len = sprintf(p, "%.*s", namelen, name); |
320 | name_component[name_depth + 1] = p + len; |
321 | } |
322 | name_depth++; |
323 | } |
324 | |
325 | static void pop_filename(void) |
326 | { |
327 | name_depth--; |
328 | if (name_depth < MAX_DEPTH) { |
329 | *name_component[name_depth] = '\0'; |
330 | if (!name_depth) { |
331 | current_name[0] = '/'; |
332 | current_name[1] = '\0'; |
333 | } |
334 | } |
335 | } |
336 | |
337 | static int ask(const char *string, int def) |
338 | { |
339 | int c; |
340 | |
341 | if (!OPT_repair) { |
342 | bb_putchar('\n'); |
343 | errors_uncorrected = 1; |
344 | return 0; |
345 | } |
346 | if (OPT_automatic) { |
347 | bb_putchar('\n'); |
348 | if (!def) |
349 | errors_uncorrected = 1; |
350 | return def; |
351 | } |
352 | printf(def ? "%s (y/n)? " : "%s (n/y)? ", string); |
353 | for (;;) { |
354 | fflush_all(); |
355 | c = getchar(); |
356 | if (c == EOF) { |
357 | if (!def) |
358 | errors_uncorrected = 1; |
359 | return def; |
360 | } |
361 | if (c == '\n') |
362 | break; |
363 | c |= 0x20; /* tolower */ |
364 | if (c == 'y') { |
365 | def = 1; |
366 | break; |
367 | } |
368 | if (c == 'n') { |
369 | def = 0; |
370 | break; |
371 | } |
372 | } |
373 | if (def) |
374 | printf("y\n"); |
375 | else { |
376 | printf("n\n"); |
377 | errors_uncorrected = 1; |
378 | } |
379 | return def; |
380 | } |
381 | |
382 | /* |
383 | * Make certain that we aren't checking a filesystem that is on a |
384 | * mounted partition. Code adapted from e2fsck, Copyright (C) 1993, |
385 | * 1994 Theodore Ts'o. Also licensed under GPL. |
386 | */ |
387 | static void check_mount(void) |
388 | { |
389 | if (find_mount_point(device_name, 0)) { |
390 | int cont; |
391 | #if ENABLE_FEATURE_MTAB_SUPPORT |
392 | /* |
393 | * If the root is mounted read-only, then /etc/mtab is |
394 | * probably not correct; so we won't issue a warning based on |
395 | * it. |
396 | */ |
397 | int fd = open(bb_path_mtab_file, O_RDWR); |
398 | |
399 | if (fd < 0 && errno == EROFS) |
400 | return; |
401 | close(fd); |
402 | #endif |
403 | printf("%s is mounted. ", device_name); |
404 | cont = 0; |
405 | if (isatty(0) && isatty(1)) |
406 | cont = ask("Do you really want to continue", 0); |
407 | if (!cont) { |
408 | printf("Check aborted\n"); |
409 | exit(EXIT_SUCCESS); |
410 | } |
411 | } |
412 | } |
413 | |
414 | /* |
415 | * check_zone_nr checks to see that *nr is a valid zone nr. If it |
416 | * isn't, it will possibly be repaired. Check_zone_nr sets *corrected |
417 | * if an error was corrected, and returns the zone (0 for no zone |
418 | * or a bad zone-number). |
419 | */ |
420 | static int check_zone_nr2(uint32_t *nr, smallint *corrected) |
421 | { |
422 | const char *msg; |
423 | if (!*nr) |
424 | return 0; |
425 | if (*nr < FIRSTZONE) |
426 | msg = "< FIRSTZONE"; |
427 | else if (*nr >= ZONES) |
428 | msg = ">= ZONES"; |
429 | else |
430 | return *nr; |
431 | printf("Zone nr %s in file '%s'. ", msg, current_name); |
432 | if (ask("Remove block", 1)) { |
433 | *nr = 0; |
434 | *corrected = 1; |
435 | } |
436 | return 0; |
437 | } |
438 | |
439 | static int check_zone_nr(uint16_t *nr, smallint *corrected) |
440 | { |
441 | uint32_t nr32 = *nr; |
442 | int r = check_zone_nr2(&nr32, corrected); |
443 | *nr = (uint16_t)nr32; |
444 | return r; |
445 | } |
446 | |
447 | /* |
448 | * read-block reads block nr into the buffer at addr. |
449 | */ |
450 | static void read_block(unsigned nr, void *addr) |
451 | { |
452 | if (!nr) { |
453 | memset(addr, 0, BLOCK_SIZE); |
454 | return; |
455 | } |
456 | xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET); |
457 | if (BLOCK_SIZE != full_read(dev_fd, addr, BLOCK_SIZE)) { |
458 | printf("%s: bad block %u in file '%s'\n", |
459 | bb_msg_read_error, nr, current_name); |
460 | errors_uncorrected = 1; |
461 | memset(addr, 0, BLOCK_SIZE); |
462 | } |
463 | } |
464 | |
465 | /* |
466 | * write_block writes block nr to disk. |
467 | */ |
468 | static void write_block(unsigned nr, void *addr) |
469 | { |
470 | if (!nr) |
471 | return; |
472 | if (nr < FIRSTZONE || nr >= ZONES) { |
473 | printf("Internal error: trying to write bad block\n" |
474 | "Write request ignored\n"); |
475 | errors_uncorrected = 1; |
476 | return; |
477 | } |
478 | xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET); |
479 | if (BLOCK_SIZE != full_write(dev_fd, addr, BLOCK_SIZE)) { |
480 | printf("%s: bad block %u in file '%s'\n", |
481 | bb_msg_write_error, nr, current_name); |
482 | errors_uncorrected = 1; |
483 | } |
484 | } |
485 | |
486 | /* |
487 | * map_block calculates the absolute block nr of a block in a file. |
488 | * It sets 'changed' if the inode has needed changing, and re-writes |
489 | * any indirect blocks with errors. |
490 | */ |
491 | static int map_block(struct minix1_inode *inode, unsigned blknr) |
492 | { |
493 | uint16_t ind[BLOCK_SIZE >> 1]; |
494 | int block, result; |
495 | smallint blk_chg; |
496 | |
497 | if (blknr < 7) |
498 | return check_zone_nr(inode->i_zone + blknr, &changed); |
499 | blknr -= 7; |
500 | if (blknr < 512) { |
501 | block = check_zone_nr(inode->i_zone + 7, &changed); |
502 | goto common; |
503 | } |
504 | blknr -= 512; |
505 | block = check_zone_nr(inode->i_zone + 8, &changed); |
506 | read_block(block, ind); /* double indirect */ |
507 | blk_chg = 0; |
508 | result = check_zone_nr(&ind[blknr / 512], &blk_chg); |
509 | if (blk_chg) |
510 | write_block(block, ind); |
511 | block = result; |
512 | common: |
513 | read_block(block, ind); |
514 | blk_chg = 0; |
515 | result = check_zone_nr(&ind[blknr % 512], &blk_chg); |
516 | if (blk_chg) |
517 | write_block(block, ind); |
518 | return result; |
519 | } |
520 | |
521 | #if ENABLE_FEATURE_MINIX2 |
522 | static int map_block2(struct minix2_inode *inode, unsigned blknr) |
523 | { |
524 | uint32_t ind[BLOCK_SIZE >> 2]; |
525 | int block, result; |
526 | smallint blk_chg; |
527 | |
528 | if (blknr < 7) |
529 | return check_zone_nr2(inode->i_zone + blknr, &changed); |
530 | blknr -= 7; |
531 | if (blknr < 256) { |
532 | block = check_zone_nr2(inode->i_zone + 7, &changed); |
533 | goto common2; |
534 | } |
535 | blknr -= 256; |
536 | if (blknr < 256 * 256) { |
537 | block = check_zone_nr2(inode->i_zone + 8, &changed); |
538 | goto common1; |
539 | } |
540 | blknr -= 256 * 256; |
541 | block = check_zone_nr2(inode->i_zone + 9, &changed); |
542 | read_block(block, ind); /* triple indirect */ |
543 | blk_chg = 0; |
544 | result = check_zone_nr2(&ind[blknr / (256 * 256)], &blk_chg); |
545 | if (blk_chg) |
546 | write_block(block, ind); |
547 | block = result; |
548 | common1: |
549 | read_block(block, ind); /* double indirect */ |
550 | blk_chg = 0; |
551 | result = check_zone_nr2(&ind[(blknr / 256) % 256], &blk_chg); |
552 | if (blk_chg) |
553 | write_block(block, ind); |
554 | block = result; |
555 | common2: |
556 | read_block(block, ind); |
557 | blk_chg = 0; |
558 | result = check_zone_nr2(&ind[blknr % 256], &blk_chg); |
559 | if (blk_chg) |
560 | write_block(block, ind); |
561 | return result; |
562 | } |
563 | #endif |
564 | |
565 | static void write_superblock(void) |
566 | { |
567 | /* |
568 | * Set the state of the filesystem based on whether or not there |
569 | * are uncorrected errors. The filesystem valid flag is |
570 | * unconditionally set if we get this far. |
571 | */ |
572 | Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS; |
573 | if (!errors_uncorrected) |
574 | Super.s_state &= ~MINIX_ERROR_FS; |
575 | |
576 | xlseek(dev_fd, BLOCK_SIZE, SEEK_SET); |
577 | if (BLOCK_SIZE != full_write(dev_fd, superblock_buffer, BLOCK_SIZE)) |
578 | die("can't write superblock"); |
579 | } |
580 | |
581 | static void write_tables(void) |
582 | { |
583 | write_superblock(); |
584 | |
585 | if (IMAPS * BLOCK_SIZE != write(dev_fd, inode_map, IMAPS * BLOCK_SIZE)) |
586 | die("can't write inode map"); |
587 | if (ZMAPS * BLOCK_SIZE != write(dev_fd, zone_map, ZMAPS * BLOCK_SIZE)) |
588 | die("can't write zone map"); |
589 | if (INODE_BUFFER_SIZE != write(dev_fd, inode_buffer, INODE_BUFFER_SIZE)) |
590 | die("can't write inodes"); |
591 | } |
592 | |
593 | static void get_dirsize(void) |
594 | { |
595 | int block; |
596 | char blk[BLOCK_SIZE]; |
597 | int size; |
598 | |
599 | #if ENABLE_FEATURE_MINIX2 |
600 | if (version2) |
601 | block = Inode2[MINIX_ROOT_INO].i_zone[0]; |
602 | else |
603 | #endif |
604 | block = Inode1[MINIX_ROOT_INO].i_zone[0]; |
605 | read_block(block, blk); |
606 | for (size = 16; size < BLOCK_SIZE; size <<= 1) { |
607 | if (strcmp(blk + size + 2, "..") == 0) { |
608 | dirsize = size; |
609 | namelen = size - 2; |
610 | return; |
611 | } |
612 | } |
613 | /* use defaults */ |
614 | } |
615 | |
616 | static void read_superblock(void) |
617 | { |
618 | xlseek(dev_fd, BLOCK_SIZE, SEEK_SET); |
619 | if (BLOCK_SIZE != full_read(dev_fd, superblock_buffer, BLOCK_SIZE)) |
620 | die("can't read superblock"); |
621 | /* already initialized to: |
622 | namelen = 14; |
623 | dirsize = 16; |
624 | version2 = 0; |
625 | */ |
626 | if (MAGIC == MINIX1_SUPER_MAGIC) { |
627 | } else if (MAGIC == MINIX1_SUPER_MAGIC2) { |
628 | namelen = 30; |
629 | dirsize = 32; |
630 | #if ENABLE_FEATURE_MINIX2 |
631 | } else if (MAGIC == MINIX2_SUPER_MAGIC) { |
632 | version2 = 1; |
633 | } else if (MAGIC == MINIX2_SUPER_MAGIC2) { |
634 | namelen = 30; |
635 | dirsize = 32; |
636 | version2 = 1; |
637 | #endif |
638 | } else |
639 | die("bad magic number in superblock"); |
640 | if (ZONESIZE != 0 || BLOCK_SIZE != 1024) |
641 | die("only 1k blocks/zones supported"); |
642 | if (IMAPS * BLOCK_SIZE * 8 < INODES + 1) |
643 | die("bad s_imap_blocks field in superblock"); |
644 | if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1) |
645 | die("bad s_zmap_blocks field in superblock"); |
646 | } |
647 | |
648 | static void read_tables(void) |
649 | { |
650 | inode_map = xzalloc(IMAPS * BLOCK_SIZE); |
651 | zone_map = xzalloc(ZMAPS * BLOCK_SIZE); |
652 | inode_buffer = xmalloc(INODE_BUFFER_SIZE); |
653 | inode_count = xmalloc(INODES + 1); |
654 | zone_count = xmalloc(ZONES); |
655 | if (IMAPS * BLOCK_SIZE != read(dev_fd, inode_map, IMAPS * BLOCK_SIZE)) |
656 | die("can't read inode map"); |
657 | if (ZMAPS * BLOCK_SIZE != read(dev_fd, zone_map, ZMAPS * BLOCK_SIZE)) |
658 | die("can't read zone map"); |
659 | if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE)) |
660 | die("can't read inodes"); |
661 | if (NORM_FIRSTZONE != FIRSTZONE) { |
662 | printf("warning: firstzone!=norm_firstzone\n"); |
663 | errors_uncorrected = 1; |
664 | } |
665 | get_dirsize(); |
666 | if (OPT_show) { |
667 | printf("%u inodes\n" |
668 | "%u blocks\n" |
669 | "Firstdatazone=%u (%u)\n" |
670 | "Zonesize=%u\n" |
671 | "Maxsize=%u\n" |
672 | "Filesystem state=%u\n" |
673 | "namelen=%u\n\n", |
674 | INODES, |
675 | ZONES, |
676 | FIRSTZONE, NORM_FIRSTZONE, |
677 | BLOCK_SIZE << ZONESIZE, |
678 | MAXSIZE, |
679 | Super.s_state, |
680 | namelen); |
681 | } |
682 | } |
683 | |
684 | static void get_inode_common(unsigned nr, uint16_t i_mode) |
685 | { |
686 | total++; |
687 | if (!inode_count[nr]) { |
688 | if (!inode_in_use(nr)) { |
689 | printf("Inode %u is marked as 'unused', but it is used " |
690 | "for file '%s'\n", nr, current_name); |
691 | if (OPT_repair) { |
692 | if (ask("Mark as 'in use'", 1)) |
693 | mark_inode(nr); |
694 | else |
695 | errors_uncorrected = 1; |
696 | } |
697 | } |
698 | if (S_ISDIR(i_mode)) |
699 | directory++; |
700 | else if (S_ISREG(i_mode)) |
701 | regular++; |
702 | else if (S_ISCHR(i_mode)) |
703 | chardev++; |
704 | else if (S_ISBLK(i_mode)) |
705 | blockdev++; |
706 | else if (S_ISLNK(i_mode)) |
707 | symlinks++; |
708 | else if (S_ISSOCK(i_mode)); |
709 | else if (S_ISFIFO(i_mode)); |
710 | else { |
711 | printf("%s has mode %05o\n", current_name, i_mode); |
712 | } |
713 | } else |
714 | links++; |
715 | if (!++inode_count[nr]) { |
716 | printf("Warning: inode count too big\n"); |
717 | inode_count[nr]--; |
718 | errors_uncorrected = 1; |
719 | } |
720 | } |
721 | |
722 | static struct minix1_inode *get_inode(unsigned nr) |
723 | { |
724 | struct minix1_inode *inode; |
725 | |
726 | if (!nr || nr > INODES) |
727 | return NULL; |
728 | inode = Inode1 + nr; |
729 | get_inode_common(nr, inode->i_mode); |
730 | return inode; |
731 | } |
732 | |
733 | #if ENABLE_FEATURE_MINIX2 |
734 | static struct minix2_inode *get_inode2(unsigned nr) |
735 | { |
736 | struct minix2_inode *inode; |
737 | |
738 | if (!nr || nr > INODES) |
739 | return NULL; |
740 | inode = Inode2 + nr; |
741 | get_inode_common(nr, inode->i_mode); |
742 | return inode; |
743 | } |
744 | #endif |
745 | |
746 | static void check_root(void) |
747 | { |
748 | struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO; |
749 | |
750 | if (!inode || !S_ISDIR(inode->i_mode)) |
751 | die("root inode isn't a directory"); |
752 | } |
753 | |
754 | #if ENABLE_FEATURE_MINIX2 |
755 | static void check_root2(void) |
756 | { |
757 | struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO; |
758 | |
759 | if (!inode || !S_ISDIR(inode->i_mode)) |
760 | die("root inode isn't a directory"); |
761 | } |
762 | #else |
763 | void check_root2(void); |
764 | #endif |
765 | |
766 | static int add_zone_common(int block, smallint *corrected) |
767 | { |
768 | if (!block) |
769 | return 0; |
770 | if (zone_count[block]) { |
771 | printf("Already used block is reused in file '%s'. ", |
772 | current_name); |
773 | if (ask("Clear", 1)) { |
774 | block = 0; |
775 | *corrected = 1; |
776 | return -1; /* "please zero out *znr" */ |
777 | } |
778 | } |
779 | if (!zone_in_use(block)) { |
780 | printf("Block %d in file '%s' is marked as 'unused'. ", |
781 | block, current_name); |
782 | if (ask("Correct", 1)) |
783 | mark_zone(block); |
784 | } |
785 | if (!++zone_count[block]) |
786 | zone_count[block]--; |
787 | return block; |
788 | } |
789 | |
790 | static int add_zone(uint16_t *znr, smallint *corrected) |
791 | { |
792 | int block; |
793 | |
794 | block = check_zone_nr(znr, corrected); |
795 | block = add_zone_common(block, corrected); |
796 | if (block == -1) { |
797 | *znr = 0; |
798 | block = 0; |
799 | } |
800 | return block; |
801 | } |
802 | |
803 | #if ENABLE_FEATURE_MINIX2 |
804 | static int add_zone2(uint32_t *znr, smallint *corrected) |
805 | { |
806 | int block; |
807 | |
808 | block = check_zone_nr2(znr, corrected); |
809 | block = add_zone_common(block, corrected); |
810 | if (block == -1) { |
811 | *znr = 0; |
812 | block = 0; |
813 | } |
814 | return block; |
815 | } |
816 | #endif |
817 | |
818 | static void add_zone_ind(uint16_t *znr, smallint *corrected) |
819 | { |
820 | int i; |
821 | int block; |
822 | smallint chg_blk = 0; |
823 | |
824 | block = add_zone(znr, corrected); |
825 | if (!block) |
826 | return; |
827 | read_block(block, add_zone_ind_blk); |
828 | for (i = 0; i < (BLOCK_SIZE >> 1); i++) |
829 | add_zone(i + (uint16_t *) add_zone_ind_blk, &chg_blk); |
830 | if (chg_blk) |
831 | write_block(block, add_zone_ind_blk); |
832 | } |
833 | |
834 | #if ENABLE_FEATURE_MINIX2 |
835 | static void add_zone_ind2(uint32_t *znr, smallint *corrected) |
836 | { |
837 | int i; |
838 | int block; |
839 | smallint chg_blk = 0; |
840 | |
841 | block = add_zone2(znr, corrected); |
842 | if (!block) |
843 | return; |
844 | read_block(block, add_zone_ind_blk); |
845 | for (i = 0; i < BLOCK_SIZE >> 2; i++) |
846 | add_zone2(i + (uint32_t *) add_zone_ind_blk, &chg_blk); |
847 | if (chg_blk) |
848 | write_block(block, add_zone_ind_blk); |
849 | } |
850 | #endif |
851 | |
852 | static void add_zone_dind(uint16_t *znr, smallint *corrected) |
853 | { |
854 | int i; |
855 | int block; |
856 | smallint chg_blk = 0; |
857 | |
858 | block = add_zone(znr, corrected); |
859 | if (!block) |
860 | return; |
861 | read_block(block, add_zone_dind_blk); |
862 | for (i = 0; i < (BLOCK_SIZE >> 1); i++) |
863 | add_zone_ind(i + (uint16_t *) add_zone_dind_blk, &chg_blk); |
864 | if (chg_blk) |
865 | write_block(block, add_zone_dind_blk); |
866 | } |
867 | |
868 | #if ENABLE_FEATURE_MINIX2 |
869 | static void add_zone_dind2(uint32_t *znr, smallint *corrected) |
870 | { |
871 | int i; |
872 | int block; |
873 | smallint chg_blk = 0; |
874 | |
875 | block = add_zone2(znr, corrected); |
876 | if (!block) |
877 | return; |
878 | read_block(block, add_zone_dind_blk); |
879 | for (i = 0; i < BLOCK_SIZE >> 2; i++) |
880 | add_zone_ind2(i + (uint32_t *) add_zone_dind_blk, &chg_blk); |
881 | if (chg_blk) |
882 | write_block(block, add_zone_dind_blk); |
883 | } |
884 | |
885 | static void add_zone_tind2(uint32_t *znr, smallint *corrected) |
886 | { |
887 | int i; |
888 | int block; |
889 | smallint chg_blk = 0; |
890 | |
891 | block = add_zone2(znr, corrected); |
892 | if (!block) |
893 | return; |
894 | read_block(block, add_zone_tind_blk); |
895 | for (i = 0; i < BLOCK_SIZE >> 2; i++) |
896 | add_zone_dind2(i + (uint32_t *) add_zone_tind_blk, &chg_blk); |
897 | if (chg_blk) |
898 | write_block(block, add_zone_tind_blk); |
899 | } |
900 | #endif |
901 | |
902 | static void check_zones(unsigned i) |
903 | { |
904 | struct minix1_inode *inode; |
905 | |
906 | if (!i || i > INODES) |
907 | return; |
908 | if (inode_count[i] > 1) /* have we counted this file already? */ |
909 | return; |
910 | inode = Inode1 + i; |
911 | if (!S_ISDIR(inode->i_mode) |
912 | && !S_ISREG(inode->i_mode) |
913 | && !S_ISLNK(inode->i_mode) |
914 | ) { |
915 | return; |
916 | } |
917 | for (i = 0; i < 7; i++) |
918 | add_zone(i + inode->i_zone, &changed); |
919 | add_zone_ind(7 + inode->i_zone, &changed); |
920 | add_zone_dind(8 + inode->i_zone, &changed); |
921 | } |
922 | |
923 | #if ENABLE_FEATURE_MINIX2 |
924 | static void check_zones2(unsigned i) |
925 | { |
926 | struct minix2_inode *inode; |
927 | |
928 | if (!i || i > INODES) |
929 | return; |
930 | if (inode_count[i] > 1) /* have we counted this file already? */ |
931 | return; |
932 | inode = Inode2 + i; |
933 | if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) |
934 | && !S_ISLNK(inode->i_mode)) |
935 | return; |
936 | for (i = 0; i < 7; i++) |
937 | add_zone2(i + inode->i_zone, &changed); |
938 | add_zone_ind2(7 + inode->i_zone, &changed); |
939 | add_zone_dind2(8 + inode->i_zone, &changed); |
940 | add_zone_tind2(9 + inode->i_zone, &changed); |
941 | } |
942 | #endif |
943 | |
944 | static void check_file(struct minix1_inode *dir, unsigned offset) |
945 | { |
946 | struct minix1_inode *inode; |
947 | int ino; |
948 | char *name; |
949 | int block; |
950 | |
951 | block = map_block(dir, offset / BLOCK_SIZE); |
952 | read_block(block, check_file_blk); |
953 | name = check_file_blk + (offset % BLOCK_SIZE) + 2; |
954 | ino = *(uint16_t *) (name - 2); |
955 | if (ino > INODES) { |
956 | printf("%s contains a bad inode number for file '%.*s'. ", |
957 | current_name, namelen, name); |
958 | if (ask("Remove", 1)) { |
959 | *(uint16_t *) (name - 2) = 0; |
960 | write_block(block, check_file_blk); |
961 | } |
962 | ino = 0; |
963 | } |
964 | push_filename(name); |
965 | inode = get_inode(ino); |
966 | pop_filename(); |
967 | if (!offset) { |
968 | if (inode && LONE_CHAR(name, '.')) |
969 | return; |
970 | printf("%s: bad directory: '.' isn't first\n", current_name); |
971 | errors_uncorrected = 1; |
972 | } |
973 | if (offset == dirsize) { |
974 | if (inode && strcmp("..", name) == 0) |
975 | return; |
976 | printf("%s: bad directory: '..' isn't second\n", current_name); |
977 | errors_uncorrected = 1; |
978 | } |
979 | if (!inode) |
980 | return; |
981 | push_filename(name); |
982 | if (OPT_list) { |
983 | if (OPT_verbose) |
984 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks); |
985 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : ""); |
986 | } |
987 | check_zones(ino); |
988 | if (inode && S_ISDIR(inode->i_mode)) |
989 | recursive_check(ino); |
990 | pop_filename(); |
991 | } |
992 | |
993 | #if ENABLE_FEATURE_MINIX2 |
994 | static void check_file2(struct minix2_inode *dir, unsigned offset) |
995 | { |
996 | struct minix2_inode *inode; |
997 | int ino; |
998 | char *name; |
999 | int block; |
1000 | |
1001 | block = map_block2(dir, offset / BLOCK_SIZE); |
1002 | read_block(block, check_file_blk); |
1003 | name = check_file_blk + (offset % BLOCK_SIZE) + 2; |
1004 | ino = *(uint16_t *) (name - 2); |
1005 | if (ino > INODES) { |
1006 | printf("%s contains a bad inode number for file '%.*s'. ", |
1007 | current_name, namelen, name); |
1008 | if (ask("Remove", 1)) { |
1009 | *(uint16_t *) (name - 2) = 0; |
1010 | write_block(block, check_file_blk); |
1011 | } |
1012 | ino = 0; |
1013 | } |
1014 | push_filename(name); |
1015 | inode = get_inode2(ino); |
1016 | pop_filename(); |
1017 | if (!offset) { |
1018 | if (inode && LONE_CHAR(name, '.')) |
1019 | return; |
1020 | printf("%s: bad directory: '.' isn't first\n", current_name); |
1021 | errors_uncorrected = 1; |
1022 | } |
1023 | if (offset == dirsize) { |
1024 | if (inode && strcmp("..", name) == 0) |
1025 | return; |
1026 | printf("%s: bad directory: '..' isn't second\n", current_name); |
1027 | errors_uncorrected = 1; |
1028 | } |
1029 | if (!inode) |
1030 | return; |
1031 | push_filename(name); |
1032 | if (OPT_list) { |
1033 | if (OPT_verbose) |
1034 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks); |
1035 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : ""); |
1036 | } |
1037 | check_zones2(ino); |
1038 | if (inode && S_ISDIR(inode->i_mode)) |
1039 | recursive_check2(ino); |
1040 | pop_filename(); |
1041 | } |
1042 | #endif |
1043 | |
1044 | static void recursive_check(unsigned ino) |
1045 | { |
1046 | struct minix1_inode *dir; |
1047 | unsigned offset; |
1048 | |
1049 | dir = Inode1 + ino; |
1050 | if (!S_ISDIR(dir->i_mode)) |
1051 | die("internal error"); |
1052 | if (dir->i_size < 2 * dirsize) { |
1053 | printf("%s: bad directory: size<32", current_name); |
1054 | errors_uncorrected = 1; |
1055 | } |
1056 | for (offset = 0; offset < dir->i_size; offset += dirsize) |
1057 | check_file(dir, offset); |
1058 | } |
1059 | |
1060 | #if ENABLE_FEATURE_MINIX2 |
1061 | static void recursive_check2(unsigned ino) |
1062 | { |
1063 | struct minix2_inode *dir; |
1064 | unsigned offset; |
1065 | |
1066 | dir = Inode2 + ino; |
1067 | if (!S_ISDIR(dir->i_mode)) |
1068 | die("internal error"); |
1069 | if (dir->i_size < 2 * dirsize) { |
1070 | printf("%s: bad directory: size<32", current_name); |
1071 | errors_uncorrected = 1; |
1072 | } |
1073 | for (offset = 0; offset < dir->i_size; offset += dirsize) |
1074 | check_file2(dir, offset); |
1075 | } |
1076 | #endif |
1077 | |
1078 | static int bad_zone(int i) |
1079 | { |
1080 | char buffer[BLOCK_SIZE]; |
1081 | |
1082 | xlseek(dev_fd, BLOCK_SIZE * i, SEEK_SET); |
1083 | return (BLOCK_SIZE != full_read(dev_fd, buffer, BLOCK_SIZE)); |
1084 | } |
1085 | |
1086 | static void check_counts(void) |
1087 | { |
1088 | int i; |
1089 | |
1090 | for (i = 1; i <= INODES; i++) { |
1091 | if (OPT_warn_mode && Inode1[i].i_mode && !inode_in_use(i)) { |
1092 | printf("Inode %d has non-zero mode. ", i); |
1093 | if (ask("Clear", 1)) { |
1094 | Inode1[i].i_mode = 0; |
1095 | changed = 1; |
1096 | } |
1097 | } |
1098 | if (!inode_count[i]) { |
1099 | if (!inode_in_use(i)) |
1100 | continue; |
1101 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i); |
1102 | if (ask("Clear", 1)) |
1103 | unmark_inode(i); |
1104 | continue; |
1105 | } |
1106 | if (!inode_in_use(i)) { |
1107 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i); |
1108 | if (ask("Set", 1)) |
1109 | mark_inode(i); |
1110 | } |
1111 | if (Inode1[i].i_nlinks != inode_count[i]) { |
1112 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ", |
1113 | i, Inode1[i].i_mode, Inode1[i].i_nlinks, |
1114 | inode_count[i]); |
1115 | if (ask("Set i_nlinks to count", 1)) { |
1116 | Inode1[i].i_nlinks = inode_count[i]; |
1117 | changed = 1; |
1118 | } |
1119 | } |
1120 | } |
1121 | for (i = FIRSTZONE; i < ZONES; i++) { |
1122 | if ((zone_in_use(i) != 0) == zone_count[i]) |
1123 | continue; |
1124 | if (!zone_count[i]) { |
1125 | if (bad_zone(i)) |
1126 | continue; |
1127 | printf("Zone %d is marked 'in use', but no file uses it. ", i); |
1128 | if (ask("Unmark", 1)) |
1129 | unmark_zone(i); |
1130 | continue; |
1131 | } |
1132 | printf("Zone %d: %sin use, counted=%d\n", |
1133 | i, zone_in_use(i) ? "" : "not ", zone_count[i]); |
1134 | } |
1135 | } |
1136 | |
1137 | #if ENABLE_FEATURE_MINIX2 |
1138 | static void check_counts2(void) |
1139 | { |
1140 | int i; |
1141 | |
1142 | for (i = 1; i <= INODES; i++) { |
1143 | if (OPT_warn_mode && Inode2[i].i_mode && !inode_in_use(i)) { |
1144 | printf("Inode %d has non-zero mode. ", i); |
1145 | if (ask("Clear", 1)) { |
1146 | Inode2[i].i_mode = 0; |
1147 | changed = 1; |
1148 | } |
1149 | } |
1150 | if (!inode_count[i]) { |
1151 | if (!inode_in_use(i)) |
1152 | continue; |
1153 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i); |
1154 | if (ask("Clear", 1)) |
1155 | unmark_inode(i); |
1156 | continue; |
1157 | } |
1158 | if (!inode_in_use(i)) { |
1159 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i); |
1160 | if (ask("Set", 1)) |
1161 | mark_inode(i); |
1162 | } |
1163 | if (Inode2[i].i_nlinks != inode_count[i]) { |
1164 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ", |
1165 | i, Inode2[i].i_mode, Inode2[i].i_nlinks, |
1166 | inode_count[i]); |
1167 | if (ask("Set i_nlinks to count", 1)) { |
1168 | Inode2[i].i_nlinks = inode_count[i]; |
1169 | changed = 1; |
1170 | } |
1171 | } |
1172 | } |
1173 | for (i = FIRSTZONE; i < ZONES; i++) { |
1174 | if ((zone_in_use(i) != 0) == zone_count[i]) |
1175 | continue; |
1176 | if (!zone_count[i]) { |
1177 | if (bad_zone(i)) |
1178 | continue; |
1179 | printf("Zone %d is marked 'in use', but no file uses it. ", i); |
1180 | if (ask("Unmark", 1)) |
1181 | unmark_zone(i); |
1182 | continue; |
1183 | } |
1184 | printf("Zone %d: %sin use, counted=%d\n", |
1185 | i, zone_in_use(i) ? "" : "not ", zone_count[i]); |
1186 | } |
1187 | } |
1188 | #endif |
1189 | |
1190 | static void check(void) |
1191 | { |
1192 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count)); |
1193 | memset(zone_count, 0, ZONES * sizeof(*zone_count)); |
1194 | check_zones(MINIX_ROOT_INO); |
1195 | recursive_check(MINIX_ROOT_INO); |
1196 | check_counts(); |
1197 | } |
1198 | |
1199 | #if ENABLE_FEATURE_MINIX2 |
1200 | static void check2(void) |
1201 | { |
1202 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count)); |
1203 | memset(zone_count, 0, ZONES * sizeof(*zone_count)); |
1204 | check_zones2(MINIX_ROOT_INO); |
1205 | recursive_check2(MINIX_ROOT_INO); |
1206 | check_counts2(); |
1207 | } |
1208 | #else |
1209 | void check2(void); |
1210 | #endif |
1211 | |
1212 | int fsck_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
1213 | int fsck_minix_main(int argc UNUSED_PARAM, char **argv) |
1214 | { |
1215 | struct termios tmp; |
1216 | int retcode = 0; |
1217 | |
1218 | xfunc_error_retval = 8; |
1219 | |
1220 | INIT_G(); |
1221 | |
1222 | opt_complementary = "=1:ar"; /* one argument; -a assumes -r */ |
1223 | getopt32(argv, OPTION_STR); |
1224 | argv += optind; |
1225 | device_name = argv[0]; |
1226 | |
1227 | check_mount(); /* trying to check a mounted filesystem? */ |
1228 | if (OPT_manual) { |
1229 | if (!isatty(0) || !isatty(1)) |
1230 | die("need terminal for interactive repairs"); |
1231 | } |
1232 | xmove_fd(xopen(device_name, OPT_repair ? O_RDWR : O_RDONLY), dev_fd); |
1233 | |
1234 | /*sync(); paranoia? */ |
1235 | read_superblock(); |
1236 | |
1237 | /* |
1238 | * Determine whether or not we should continue with the checking. |
1239 | * This is based on the status of the filesystem valid and error |
1240 | * flags and whether or not the -f switch was specified on the |
1241 | * command line. |
1242 | */ |
1243 | printf("%s: %s\n", applet_name, bb_banner); |
1244 | |
1245 | if (!(Super.s_state & MINIX_ERROR_FS) |
1246 | && (Super.s_state & MINIX_VALID_FS) && !OPT_force |
1247 | ) { |
1248 | if (OPT_repair) |
1249 | printf("%s is clean, check is skipped\n", device_name); |
1250 | return 0; |
1251 | } else if (OPT_force) |
1252 | printf("Forcing filesystem check on %s\n", device_name); |
1253 | else if (OPT_repair) |
1254 | printf("Filesystem on %s is dirty, needs checking\n", |
1255 | device_name); |
1256 | |
1257 | read_tables(); |
1258 | |
1259 | if (OPT_manual) { |
1260 | tcgetattr(0, &sv_termios); |
1261 | tmp = sv_termios; |
1262 | tmp.c_lflag &= ~(ICANON | ECHO); |
1263 | tcsetattr_stdin_TCSANOW(&tmp); |
1264 | termios_set = 1; |
1265 | } |
1266 | |
1267 | if (version2) { |
1268 | check_root2(); |
1269 | check2(); |
1270 | } else { |
1271 | check_root(); |
1272 | check(); |
1273 | } |
1274 | |
1275 | if (OPT_verbose) { |
1276 | int i, free_cnt; |
1277 | |
1278 | for (i = 1, free_cnt = 0; i <= INODES; i++) |
1279 | if (!inode_in_use(i)) |
1280 | free_cnt++; |
1281 | printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt), |
1282 | 100 * (INODES - free_cnt) / INODES); |
1283 | for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++) |
1284 | if (!zone_in_use(i)) |
1285 | free_cnt++; |
1286 | printf("%6u zones used (%u%%)\n\n" |
1287 | "%6u regular files\n" |
1288 | "%6u directories\n" |
1289 | "%6u character device files\n" |
1290 | "%6u block device files\n" |
1291 | "%6u links\n" |
1292 | "%6u symbolic links\n" |
1293 | "------\n" |
1294 | "%6u files\n", |
1295 | (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES, |
1296 | regular, directory, chardev, blockdev, |
1297 | links - 2 * directory + 1, symlinks, |
1298 | total - 2 * directory + 1); |
1299 | } |
1300 | if (changed) { |
1301 | write_tables(); |
1302 | printf("FILE SYSTEM HAS BEEN CHANGED\n"); |
1303 | sync(); |
1304 | } else if (OPT_repair) |
1305 | write_superblock(); |
1306 | |
1307 | if (OPT_manual) |
1308 | tcsetattr_stdin_TCSANOW(&sv_termios); |
1309 | |
1310 | if (changed) |
1311 | retcode += 3; |
1312 | if (errors_uncorrected) |
1313 | retcode += 4; |
1314 | return retcode; |
1315 | } |
1316 |