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Diffstat (limited to 'util-linux/fsck_minix.c')
-rw-r--r-- | util-linux/fsck_minix.c | 1417 |
1 files changed, 1417 insertions, 0 deletions
diff --git a/util-linux/fsck_minix.c b/util-linux/fsck_minix.c new file mode 100644 index 000000000..9c831bd59 --- /dev/null +++ b/util-linux/fsck_minix.c | |||
@@ -0,0 +1,1417 @@ | |||
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 | * super-block 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 Mi¶kiewicz <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 super-block 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 "busybox.h" | ||
91 | #include <mntent.h> | ||
92 | |||
93 | /* | ||
94 | * This is the original minix inode layout on disk. | ||
95 | * Note the 8-bit gid and atime and ctime. | ||
96 | */ | ||
97 | struct minix_inode { | ||
98 | uint16_t i_mode; | ||
99 | uint16_t i_uid; | ||
100 | uint32_t i_size; | ||
101 | uint32_t i_time; | ||
102 | uint8_t i_gid; | ||
103 | uint8_t i_nlinks; | ||
104 | uint16_t i_zone[9]; | ||
105 | }; | ||
106 | |||
107 | /* | ||
108 | * The new minix inode has all the time entries, as well as | ||
109 | * long block numbers and a third indirect block (7+1+1+1 | ||
110 | * instead of 7+1+1). Also, some previously 8-bit values are | ||
111 | * now 16-bit. The inode is now 64 bytes instead of 32. | ||
112 | */ | ||
113 | struct minix2_inode { | ||
114 | uint16_t i_mode; | ||
115 | uint16_t i_nlinks; | ||
116 | uint16_t i_uid; | ||
117 | uint16_t i_gid; | ||
118 | uint32_t i_size; | ||
119 | uint32_t i_atime; | ||
120 | uint32_t i_mtime; | ||
121 | uint32_t i_ctime; | ||
122 | uint32_t i_zone[10]; | ||
123 | }; | ||
124 | |||
125 | enum { | ||
126 | MINIX_ROOT_INO = 1, | ||
127 | MINIX_LINK_MAX = 250, | ||
128 | MINIX2_LINK_MAX = 65530, | ||
129 | |||
130 | MINIX_I_MAP_SLOTS = 8, | ||
131 | MINIX_Z_MAP_SLOTS = 64, | ||
132 | MINIX_SUPER_MAGIC = 0x137F, /* original minix fs */ | ||
133 | MINIX_SUPER_MAGIC2 = 0x138F, /* minix fs, 30 char names */ | ||
134 | MINIX2_SUPER_MAGIC = 0x2468, /* minix V2 fs */ | ||
135 | MINIX2_SUPER_MAGIC2 = 0x2478, /* minix V2 fs, 30 char names */ | ||
136 | MINIX_VALID_FS = 0x0001, /* Clean fs. */ | ||
137 | MINIX_ERROR_FS = 0x0002, /* fs has errors. */ | ||
138 | |||
139 | MINIX_INODES_PER_BLOCK = ((BLOCK_SIZE)/(sizeof (struct minix_inode))), | ||
140 | MINIX2_INODES_PER_BLOCK = ((BLOCK_SIZE)/(sizeof (struct minix2_inode))), | ||
141 | |||
142 | MINIX_V1 = 0x0001, /* original minix fs */ | ||
143 | MINIX_V2 = 0x0002 /* minix V2 fs */ | ||
144 | }; | ||
145 | |||
146 | #define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version | ||
147 | |||
148 | /* | ||
149 | * minix super-block data on disk | ||
150 | */ | ||
151 | struct minix_super_block { | ||
152 | uint16_t s_ninodes; | ||
153 | uint16_t s_nzones; | ||
154 | uint16_t s_imap_blocks; | ||
155 | uint16_t s_zmap_blocks; | ||
156 | uint16_t s_firstdatazone; | ||
157 | uint16_t s_log_zone_size; | ||
158 | uint32_t s_max_size; | ||
159 | uint16_t s_magic; | ||
160 | uint16_t s_state; | ||
161 | uint32_t s_zones; | ||
162 | }; | ||
163 | |||
164 | struct minix_dir_entry { | ||
165 | uint16_t inode; | ||
166 | char name[0]; | ||
167 | }; | ||
168 | |||
169 | |||
170 | #define NAME_MAX 255 /* # chars in a file name */ | ||
171 | |||
172 | #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode))) | ||
173 | |||
174 | #ifndef BLKGETSIZE | ||
175 | #define BLKGETSIZE _IO(0x12,96) /* return device size */ | ||
176 | #endif | ||
177 | |||
178 | #ifndef __linux__ | ||
179 | #define volatile | ||
180 | #endif | ||
181 | |||
182 | enum { ROOT_INO = 1 }; | ||
183 | |||
184 | #define UPPER(size,n) ((size+((n)-1))/(n)) | ||
185 | #define INODE_SIZE (sizeof(struct minix_inode)) | ||
186 | #ifdef CONFIG_FEATURE_MINIX2 | ||
187 | #define INODE_SIZE2 (sizeof(struct minix2_inode)) | ||
188 | #define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \ | ||
189 | : MINIX_INODES_PER_BLOCK)) | ||
190 | #else | ||
191 | #define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK)) | ||
192 | #endif | ||
193 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE) | ||
194 | |||
195 | #define BITS_PER_BLOCK (BLOCK_SIZE<<3) | ||
196 | |||
197 | static char *program_version = "1.2 - 11/11/96"; | ||
198 | static char *device_name; | ||
199 | static int IN; | ||
200 | static int repair, automatic, verbose, list, show, warn_mode, force; | ||
201 | static int directory, regular, blockdev, chardev, links, symlinks, total; | ||
202 | |||
203 | static int changed; /* flags if the filesystem has been changed */ | ||
204 | static int errors_uncorrected; /* flag if some error was not corrected */ | ||
205 | static int dirsize = 16; | ||
206 | static int namelen = 14; | ||
207 | static struct termios termios; | ||
208 | static int termios_set; | ||
209 | |||
210 | static char *inode_buffer; | ||
211 | #define Inode (((struct minix_inode *) inode_buffer)-1) | ||
212 | #define Inode2 (((struct minix2_inode *) inode_buffer)-1) | ||
213 | static char super_block_buffer[BLOCK_SIZE]; | ||
214 | |||
215 | #define Super (*(struct minix_super_block *)super_block_buffer) | ||
216 | #define INODES ((unsigned long)Super.s_ninodes) | ||
217 | #ifdef CONFIG_FEATURE_MINIX2 | ||
218 | static int version2; | ||
219 | #define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones)) | ||
220 | #else | ||
221 | #define ZONES ((unsigned long)(Super.s_nzones)) | ||
222 | #endif | ||
223 | #define IMAPS ((unsigned long)Super.s_imap_blocks) | ||
224 | #define ZMAPS ((unsigned long)Super.s_zmap_blocks) | ||
225 | #define FIRSTZONE ((unsigned long)Super.s_firstdatazone) | ||
226 | #define ZONESIZE ((unsigned long)Super.s_log_zone_size) | ||
227 | #define MAXSIZE ((unsigned long)Super.s_max_size) | ||
228 | #define MAGIC (Super.s_magic) | ||
229 | #define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS) | ||
230 | |||
231 | static char *inode_map; | ||
232 | static char *zone_map; | ||
233 | |||
234 | static unsigned char *inode_count; | ||
235 | static unsigned char *zone_count; | ||
236 | |||
237 | static void recursive_check(unsigned int ino); | ||
238 | #ifdef CONFIG_FEATURE_MINIX2 | ||
239 | static void recursive_check2(unsigned int ino); | ||
240 | #endif | ||
241 | |||
242 | static int bit(char *a, unsigned int i) | ||
243 | { | ||
244 | return (a[i >> 3] & (1<<(i & 7))) != 0; | ||
245 | } | ||
246 | #define inode_in_use(x) (bit(inode_map,(x))) | ||
247 | #define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1)) | ||
248 | |||
249 | #define mark_inode(x) (setbit(inode_map,(x)),changed=1) | ||
250 | #define unmark_inode(x) (clrbit(inode_map,(x)),changed=1) | ||
251 | |||
252 | #define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1),changed=1) | ||
253 | #define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1),changed=1) | ||
254 | |||
255 | static void leave(int) ATTRIBUTE_NORETURN; | ||
256 | static void leave(int status) | ||
257 | { | ||
258 | if (termios_set) | ||
259 | tcsetattr(0, TCSANOW, &termios); | ||
260 | exit(status); | ||
261 | } | ||
262 | |||
263 | static void die(const char *str) | ||
264 | { | ||
265 | bb_error_msg("%s", str); | ||
266 | leave(8); | ||
267 | } | ||
268 | |||
269 | /* File-name data */ | ||
270 | enum { MAX_DEPTH = 32 }; | ||
271 | static int name_depth; | ||
272 | static char *current_name; | ||
273 | static char *name_component[MAX_DEPTH+1]; | ||
274 | |||
275 | /* Wed Feb 9 15:17:06 MST 2000 */ | ||
276 | /* dynamically allocate name_list (instead of making it static) */ | ||
277 | static void alloc_current_name(void) | ||
278 | { | ||
279 | current_name = xmalloc(MAX_DEPTH * (BUFSIZ + 1)); | ||
280 | current_name[0] = '/'; | ||
281 | current_name[1] = '\0'; | ||
282 | name_component[0] = ¤t_name[0]; | ||
283 | } | ||
284 | |||
285 | #ifdef CONFIG_FEATURE_CLEAN_UP | ||
286 | /* execute this atexit() to deallocate name_list[] */ | ||
287 | /* piptigger was here */ | ||
288 | static void free_current_name(void) | ||
289 | { | ||
290 | free(current_name); | ||
291 | } | ||
292 | #endif | ||
293 | |||
294 | static void push_filename(const char *name) | ||
295 | { | ||
296 | // /dir/dir/dir/file | ||
297 | // ^ ^ ^ | ||
298 | // [0] [1] [2] <-name_component[i] | ||
299 | if (name_depth < MAX_DEPTH) { | ||
300 | int len; | ||
301 | char *p = name_component[name_depth]; | ||
302 | *p++ = '/'; | ||
303 | len = sprintf(p, "%.*s", namelen, name); | ||
304 | name_component[name_depth + 1] = p + len; | ||
305 | } | ||
306 | name_depth++; | ||
307 | } | ||
308 | |||
309 | static void pop_filename(void) { | ||
310 | name_depth--; | ||
311 | if (name_depth < MAX_DEPTH) { | ||
312 | *name_component[name_depth] = '\0'; | ||
313 | if (!name_depth) { | ||
314 | current_name[0] = '/'; | ||
315 | current_name[1] = '\0'; | ||
316 | } | ||
317 | } | ||
318 | } | ||
319 | |||
320 | static int ask(const char *string, int def) | ||
321 | { | ||
322 | int c; | ||
323 | |||
324 | if (!repair) { | ||
325 | puts(""); | ||
326 | errors_uncorrected = 1; | ||
327 | return 0; | ||
328 | } | ||
329 | if (automatic) { | ||
330 | puts(""); | ||
331 | if (!def) | ||
332 | errors_uncorrected = 1; | ||
333 | return def; | ||
334 | } | ||
335 | printf(def ? "%s (y/n)? " : "%s (n/y)? ", string); | ||
336 | for (;;) { | ||
337 | fflush(stdout); | ||
338 | if ((c = getchar()) == EOF) { | ||
339 | if (!def) | ||
340 | errors_uncorrected = 1; | ||
341 | return def; | ||
342 | } | ||
343 | c = toupper(c); | ||
344 | if (c == 'Y') { | ||
345 | def = 1; | ||
346 | break; | ||
347 | } else if (c == 'N') { | ||
348 | def = 0; | ||
349 | break; | ||
350 | } else if (c == ' ' || c == '\n') | ||
351 | break; | ||
352 | } | ||
353 | if (def) | ||
354 | printf("y\n"); | ||
355 | else { | ||
356 | printf("n\n"); | ||
357 | errors_uncorrected = 1; | ||
358 | } | ||
359 | return def; | ||
360 | } | ||
361 | |||
362 | /* | ||
363 | * Make certain that we aren't checking a filesystem that is on a | ||
364 | * mounted partition. Code adapted from e2fsck, Copyright (C) 1993, | ||
365 | * 1994 Theodore Ts'o. Also licensed under GPL. | ||
366 | */ | ||
367 | static void check_mount(void) | ||
368 | { | ||
369 | FILE *f; | ||
370 | struct mntent *mnt; | ||
371 | int cont; | ||
372 | int fd; | ||
373 | |||
374 | if ((f = setmntent(MOUNTED, "r")) == NULL) | ||
375 | return; | ||
376 | while ((mnt = getmntent(f)) != NULL) | ||
377 | if (strcmp(device_name, mnt->mnt_fsname) == 0) | ||
378 | break; | ||
379 | endmntent(f); | ||
380 | if (!mnt) | ||
381 | return; | ||
382 | |||
383 | /* | ||
384 | * If the root is mounted read-only, then /etc/mtab is | ||
385 | * probably not correct; so we won't issue a warning based on | ||
386 | * it. | ||
387 | */ | ||
388 | fd = open(MOUNTED, O_RDWR); | ||
389 | if (fd < 0 && errno == EROFS) | ||
390 | return; | ||
391 | else | ||
392 | close(fd); | ||
393 | |||
394 | printf("%s is mounted. ", device_name); | ||
395 | cont = 0; | ||
396 | if (isatty(0) && isatty(1)) | ||
397 | cont = ask("Do you really want to continue", 0); | ||
398 | if (!cont) { | ||
399 | printf("Check aborted\n"); | ||
400 | exit(0); | ||
401 | } | ||
402 | return; | ||
403 | } | ||
404 | |||
405 | /* | ||
406 | * check_zone_nr checks to see that *nr is a valid zone nr. If it | ||
407 | * isn't, it will possibly be repaired. Check_zone_nr sets *corrected | ||
408 | * if an error was corrected, and returns the zone (0 for no zone | ||
409 | * or a bad zone-number). | ||
410 | */ | ||
411 | static int check_zone_nr2(uint32_t *nr, int *corrected) | ||
412 | { | ||
413 | const char *msg; | ||
414 | if (!*nr) | ||
415 | return 0; | ||
416 | if (*nr < FIRSTZONE) | ||
417 | msg = "< FIRSTZONE"; | ||
418 | else if (*nr >= ZONES) | ||
419 | msg = ">= ZONES"; | ||
420 | else | ||
421 | return *nr; | ||
422 | printf("Zone nr %s in file '%s'. ", msg, current_name); | ||
423 | if (ask("Remove block", 1)) { | ||
424 | *nr = 0; | ||
425 | *corrected = 1; | ||
426 | } | ||
427 | return 0; | ||
428 | } | ||
429 | |||
430 | static int check_zone_nr(uint16_t *nr, int *corrected) | ||
431 | { | ||
432 | uint32_t nr32 = *nr; | ||
433 | int r = check_zone_nr2(&nr32, corrected); | ||
434 | *nr = (uint16_t)nr32; | ||
435 | return r; | ||
436 | } | ||
437 | |||
438 | /* | ||
439 | * read-block reads block nr into the buffer at addr. | ||
440 | */ | ||
441 | static void read_block(unsigned int nr, char *addr) | ||
442 | { | ||
443 | if (!nr) { | ||
444 | memset(addr, 0, BLOCK_SIZE); | ||
445 | return; | ||
446 | } | ||
447 | if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET)) { | ||
448 | printf("%s: cannot seek to block in file '%s'\n", | ||
449 | bb_msg_read_error, current_name); | ||
450 | errors_uncorrected = 1; | ||
451 | memset(addr, 0, BLOCK_SIZE); | ||
452 | } else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) { | ||
453 | printf("%s: bad block in file '%s'\n", | ||
454 | bb_msg_read_error, current_name); | ||
455 | errors_uncorrected = 1; | ||
456 | memset(addr, 0, BLOCK_SIZE); | ||
457 | } | ||
458 | } | ||
459 | |||
460 | /* | ||
461 | * write_block writes block nr to disk. | ||
462 | */ | ||
463 | static void write_block(unsigned int nr, char *addr) | ||
464 | { | ||
465 | if (!nr) | ||
466 | return; | ||
467 | if (nr < FIRSTZONE || nr >= ZONES) { | ||
468 | printf("Internal error: trying to write bad block\n" | ||
469 | "Write request ignored\n"); | ||
470 | errors_uncorrected = 1; | ||
471 | return; | ||
472 | } | ||
473 | if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET)) | ||
474 | die("Seek failed in write_block"); | ||
475 | if (BLOCK_SIZE != write(IN, addr, BLOCK_SIZE)) { | ||
476 | printf("%s: bad block in file '%s'\n", | ||
477 | bb_msg_write_error, current_name); | ||
478 | errors_uncorrected = 1; | ||
479 | } | ||
480 | } | ||
481 | |||
482 | /* | ||
483 | * map_block calculates the absolute block nr of a block in a file. | ||
484 | * It sets 'changed' if the inode has needed changing, and re-writes | ||
485 | * any indirect blocks with errors. | ||
486 | */ | ||
487 | static int map_block(struct minix_inode *inode, unsigned int blknr) | ||
488 | { | ||
489 | uint16_t ind[BLOCK_SIZE >> 1]; | ||
490 | uint16_t dind[BLOCK_SIZE >> 1]; | ||
491 | int blk_chg, block, result; | ||
492 | |||
493 | if (blknr < 7) | ||
494 | return check_zone_nr(inode->i_zone + blknr, &changed); | ||
495 | blknr -= 7; | ||
496 | if (blknr < 512) { | ||
497 | block = check_zone_nr(inode->i_zone + 7, &changed); | ||
498 | read_block(block, (char *) ind); | ||
499 | blk_chg = 0; | ||
500 | result = check_zone_nr(blknr + ind, &blk_chg); | ||
501 | if (blk_chg) | ||
502 | write_block(block, (char *) ind); | ||
503 | return result; | ||
504 | } | ||
505 | blknr -= 512; | ||
506 | block = check_zone_nr(inode->i_zone + 8, &changed); | ||
507 | read_block(block, (char *) dind); | ||
508 | blk_chg = 0; | ||
509 | result = check_zone_nr(dind + (blknr / 512), &blk_chg); | ||
510 | if (blk_chg) | ||
511 | write_block(block, (char *) dind); | ||
512 | block = result; | ||
513 | read_block(block, (char *) ind); | ||
514 | blk_chg = 0; | ||
515 | result = check_zone_nr(ind + (blknr % 512), &blk_chg); | ||
516 | if (blk_chg) | ||
517 | write_block(block, (char *) ind); | ||
518 | return result; | ||
519 | } | ||
520 | |||
521 | #ifdef CONFIG_FEATURE_MINIX2 | ||
522 | static int map_block2(struct minix2_inode *inode, unsigned int blknr) | ||
523 | { | ||
524 | uint32_t ind[BLOCK_SIZE >> 2]; | ||
525 | uint32_t dind[BLOCK_SIZE >> 2]; | ||
526 | uint32_t tind[BLOCK_SIZE >> 2]; | ||
527 | int blk_chg, block, result; | ||
528 | |||
529 | if (blknr < 7) | ||
530 | return check_zone_nr2(inode->i_zone + blknr, &changed); | ||
531 | blknr -= 7; | ||
532 | if (blknr < 256) { | ||
533 | block = check_zone_nr2(inode->i_zone + 7, &changed); | ||
534 | read_block(block, (char *) ind); | ||
535 | blk_chg = 0; | ||
536 | result = check_zone_nr2(blknr + ind, &blk_chg); | ||
537 | if (blk_chg) | ||
538 | write_block(block, (char *) ind); | ||
539 | return result; | ||
540 | } | ||
541 | blknr -= 256; | ||
542 | if (blknr >= 256 * 256) { | ||
543 | block = check_zone_nr2(inode->i_zone + 8, &changed); | ||
544 | read_block(block, (char *) dind); | ||
545 | blk_chg = 0; | ||
546 | result = check_zone_nr2(dind + blknr / 256, &blk_chg); | ||
547 | if (blk_chg) | ||
548 | write_block(block, (char *) dind); | ||
549 | block = result; | ||
550 | read_block(block, (char *) ind); | ||
551 | blk_chg = 0; | ||
552 | result = check_zone_nr2(ind + blknr % 256, &blk_chg); | ||
553 | if (blk_chg) | ||
554 | write_block(block, (char *) ind); | ||
555 | return result; | ||
556 | } | ||
557 | blknr -= 256 * 256; | ||
558 | block = check_zone_nr2(inode->i_zone + 9, &changed); | ||
559 | read_block(block, (char *) tind); | ||
560 | blk_chg = 0; | ||
561 | result = check_zone_nr2(tind + blknr / (256 * 256), &blk_chg); | ||
562 | if (blk_chg) | ||
563 | write_block(block, (char *) tind); | ||
564 | block = result; | ||
565 | read_block(block, (char *) dind); | ||
566 | blk_chg = 0; | ||
567 | result = check_zone_nr2(dind + (blknr / 256) % 256, &blk_chg); | ||
568 | if (blk_chg) | ||
569 | write_block(block, (char *) dind); | ||
570 | block = result; | ||
571 | read_block(block, (char *) ind); | ||
572 | blk_chg = 0; | ||
573 | result = check_zone_nr2(ind + blknr % 256, &blk_chg); | ||
574 | if (blk_chg) | ||
575 | write_block(block, (char *) ind); | ||
576 | return result; | ||
577 | } | ||
578 | #endif | ||
579 | |||
580 | static void write_super_block(void) | ||
581 | { | ||
582 | /* | ||
583 | * Set the state of the filesystem based on whether or not there | ||
584 | * are uncorrected errors. The filesystem valid flag is | ||
585 | * unconditionally set if we get this far. | ||
586 | */ | ||
587 | Super.s_state |= MINIX_VALID_FS; | ||
588 | if (errors_uncorrected) | ||
589 | Super.s_state |= MINIX_ERROR_FS; | ||
590 | else | ||
591 | Super.s_state &= ~MINIX_ERROR_FS; | ||
592 | |||
593 | if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET)) | ||
594 | die("Seek failed in write_super_block"); | ||
595 | if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE)) | ||
596 | die("Unable to write super-block"); | ||
597 | } | ||
598 | |||
599 | static void write_tables(void) | ||
600 | { | ||
601 | write_super_block(); | ||
602 | |||
603 | if (IMAPS * BLOCK_SIZE != write(IN, inode_map, IMAPS * BLOCK_SIZE)) | ||
604 | die("Unable to write inode map"); | ||
605 | if (ZMAPS * BLOCK_SIZE != write(IN, zone_map, ZMAPS * BLOCK_SIZE)) | ||
606 | die("Unable to write zone map"); | ||
607 | if (INODE_BUFFER_SIZE != write(IN, inode_buffer, INODE_BUFFER_SIZE)) | ||
608 | die("Unable to write inodes"); | ||
609 | } | ||
610 | |||
611 | static void get_dirsize(void) | ||
612 | { | ||
613 | int block; | ||
614 | char blk[BLOCK_SIZE]; | ||
615 | int size; | ||
616 | |||
617 | #ifdef CONFIG_FEATURE_MINIX2 | ||
618 | if (version2) | ||
619 | block = Inode2[ROOT_INO].i_zone[0]; | ||
620 | else | ||
621 | #endif | ||
622 | block = Inode[ROOT_INO].i_zone[0]; | ||
623 | read_block(block, blk); | ||
624 | for (size = 16; size < BLOCK_SIZE; size <<= 1) { | ||
625 | if (strcmp(blk + size + 2, "..") == 0) { | ||
626 | dirsize = size; | ||
627 | namelen = size - 2; | ||
628 | return; | ||
629 | } | ||
630 | } | ||
631 | /* use defaults */ | ||
632 | } | ||
633 | |||
634 | static void read_superblock(void) | ||
635 | { | ||
636 | if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET)) | ||
637 | die("Seek failed"); | ||
638 | if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE)) | ||
639 | die("Unable to read super block"); | ||
640 | /* already initialized to: | ||
641 | namelen = 14; | ||
642 | dirsize = 16; | ||
643 | version2 = 0; | ||
644 | */ | ||
645 | if (MAGIC == MINIX_SUPER_MAGIC) { | ||
646 | } else if (MAGIC == MINIX_SUPER_MAGIC2) { | ||
647 | namelen = 30; | ||
648 | dirsize = 32; | ||
649 | #ifdef CONFIG_FEATURE_MINIX2 | ||
650 | } else if (MAGIC == MINIX2_SUPER_MAGIC) { | ||
651 | version2 = 1; | ||
652 | } else if (MAGIC == MINIX2_SUPER_MAGIC2) { | ||
653 | namelen = 30; | ||
654 | dirsize = 32; | ||
655 | version2 = 1; | ||
656 | #endif | ||
657 | } else | ||
658 | die("Bad magic number in super-block"); | ||
659 | if (ZONESIZE != 0 || BLOCK_SIZE != 1024) | ||
660 | die("Only 1k blocks/zones supported"); | ||
661 | if (IMAPS * BLOCK_SIZE * 8 < INODES + 1) | ||
662 | die("Bad s_imap_blocks field in super-block"); | ||
663 | if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1) | ||
664 | die("Bad s_zmap_blocks field in super-block"); | ||
665 | } | ||
666 | |||
667 | static void read_tables(void) | ||
668 | { | ||
669 | inode_map = xzalloc(IMAPS * BLOCK_SIZE); | ||
670 | zone_map = xzalloc(ZMAPS * BLOCK_SIZE); | ||
671 | inode_buffer = xmalloc(INODE_BUFFER_SIZE); | ||
672 | inode_count = xmalloc(INODES + 1); | ||
673 | zone_count = xmalloc(ZONES); | ||
674 | if (IMAPS * BLOCK_SIZE != read(IN, inode_map, IMAPS * BLOCK_SIZE)) | ||
675 | die("Unable to read inode map"); | ||
676 | if (ZMAPS * BLOCK_SIZE != read(IN, zone_map, ZMAPS * BLOCK_SIZE)) | ||
677 | die("Unable to read zone map"); | ||
678 | if (INODE_BUFFER_SIZE != read(IN, inode_buffer, INODE_BUFFER_SIZE)) | ||
679 | die("Unable to read inodes"); | ||
680 | if (NORM_FIRSTZONE != FIRSTZONE) { | ||
681 | printf("Warning: Firstzone!=Norm_firstzone\n"); | ||
682 | errors_uncorrected = 1; | ||
683 | } | ||
684 | get_dirsize(); | ||
685 | if (show) { | ||
686 | printf("%ld inodes\n" | ||
687 | "%ld blocks\n" | ||
688 | "Firstdatazone=%ld (%ld)\n" | ||
689 | "Zonesize=%d\n" | ||
690 | "Maxsize=%ld\n" | ||
691 | "Filesystem state=%d\n" | ||
692 | "namelen=%d\n\n", | ||
693 | INODES, | ||
694 | ZONES, | ||
695 | FIRSTZONE, NORM_FIRSTZONE, | ||
696 | BLOCK_SIZE << ZONESIZE, | ||
697 | MAXSIZE, | ||
698 | Super.s_state, | ||
699 | namelen); | ||
700 | } | ||
701 | } | ||
702 | |||
703 | static struct minix_inode *get_inode(unsigned int nr) | ||
704 | { | ||
705 | struct minix_inode *inode; | ||
706 | |||
707 | if (!nr || nr > INODES) | ||
708 | return NULL; | ||
709 | total++; | ||
710 | inode = Inode + nr; | ||
711 | if (!inode_count[nr]) { | ||
712 | if (!inode_in_use(nr)) { | ||
713 | printf("Inode %d is marked as 'unused', but it is used " | ||
714 | "for file '%s'\n", nr, current_name); | ||
715 | if (repair) { | ||
716 | if (ask("Mark as 'in use'", 1)) | ||
717 | mark_inode(nr); | ||
718 | } else { | ||
719 | errors_uncorrected = 1; | ||
720 | } | ||
721 | } | ||
722 | if (S_ISDIR(inode->i_mode)) | ||
723 | directory++; | ||
724 | else if (S_ISREG(inode->i_mode)) | ||
725 | regular++; | ||
726 | else if (S_ISCHR(inode->i_mode)) | ||
727 | chardev++; | ||
728 | else if (S_ISBLK(inode->i_mode)) | ||
729 | blockdev++; | ||
730 | else if (S_ISLNK(inode->i_mode)) | ||
731 | symlinks++; | ||
732 | else if (S_ISSOCK(inode->i_mode)); | ||
733 | else if (S_ISFIFO(inode->i_mode)); | ||
734 | else { | ||
735 | printf("%s has mode %05o\n", current_name, inode->i_mode); | ||
736 | } | ||
737 | |||
738 | } else | ||
739 | links++; | ||
740 | if (!++inode_count[nr]) { | ||
741 | printf("Warning: inode count too big\n"); | ||
742 | inode_count[nr]--; | ||
743 | errors_uncorrected = 1; | ||
744 | } | ||
745 | return inode; | ||
746 | } | ||
747 | |||
748 | #ifdef CONFIG_FEATURE_MINIX2 | ||
749 | static struct minix2_inode *get_inode2(unsigned int nr) | ||
750 | { | ||
751 | struct minix2_inode *inode; | ||
752 | |||
753 | if (!nr || nr > INODES) | ||
754 | return NULL; | ||
755 | total++; | ||
756 | inode = Inode2 + nr; | ||
757 | if (!inode_count[nr]) { | ||
758 | if (!inode_in_use(nr)) { | ||
759 | printf("Inode %d is marked as 'unused', but it is used " | ||
760 | "for file '%s'\n", nr, current_name); | ||
761 | if (repair) { | ||
762 | if (ask("Mark as 'in use'", 1)) | ||
763 | mark_inode(nr); | ||
764 | else | ||
765 | errors_uncorrected = 1; | ||
766 | } | ||
767 | } | ||
768 | if (S_ISDIR(inode->i_mode)) | ||
769 | directory++; | ||
770 | else if (S_ISREG(inode->i_mode)) | ||
771 | regular++; | ||
772 | else if (S_ISCHR(inode->i_mode)) | ||
773 | chardev++; | ||
774 | else if (S_ISBLK(inode->i_mode)) | ||
775 | blockdev++; | ||
776 | else if (S_ISLNK(inode->i_mode)) | ||
777 | symlinks++; | ||
778 | else if (S_ISSOCK(inode->i_mode)); | ||
779 | else if (S_ISFIFO(inode->i_mode)); | ||
780 | else { | ||
781 | printf("%s has mode %05o\n", current_name, inode->i_mode); | ||
782 | } | ||
783 | } else | ||
784 | links++; | ||
785 | if (!++inode_count[nr]) { | ||
786 | printf("Warning: inode count too big\n"); | ||
787 | inode_count[nr]--; | ||
788 | errors_uncorrected = 1; | ||
789 | } | ||
790 | return inode; | ||
791 | } | ||
792 | #endif | ||
793 | |||
794 | static void check_root(void) | ||
795 | { | ||
796 | struct minix_inode *inode = Inode + ROOT_INO; | ||
797 | |||
798 | if (!inode || !S_ISDIR(inode->i_mode)) | ||
799 | die("Root inode isn't a directory"); | ||
800 | } | ||
801 | |||
802 | #ifdef CONFIG_FEATURE_MINIX2 | ||
803 | static void check_root2(void) | ||
804 | { | ||
805 | struct minix2_inode *inode = Inode2 + ROOT_INO; | ||
806 | |||
807 | if (!inode || !S_ISDIR(inode->i_mode)) | ||
808 | die("Root inode isn't a directory"); | ||
809 | } | ||
810 | #endif | ||
811 | |||
812 | static int add_zone(uint16_t *znr, int *corrected) | ||
813 | { | ||
814 | int result; | ||
815 | int block; | ||
816 | |||
817 | result = 0; | ||
818 | block = check_zone_nr(znr, corrected); | ||
819 | if (!block) | ||
820 | return 0; | ||
821 | if (zone_count[block]) { | ||
822 | printf("Already used block is reused in file '%s'. ", | ||
823 | current_name); | ||
824 | if (ask("Clear", 1)) { | ||
825 | *znr = 0; | ||
826 | block = 0; | ||
827 | *corrected = 1; | ||
828 | return 0; | ||
829 | } | ||
830 | } | ||
831 | if (!zone_in_use(block)) { | ||
832 | printf("Block %d in file '%s' is marked as 'unused'. ", | ||
833 | block, current_name); | ||
834 | if (ask("Correct", 1)) | ||
835 | mark_zone(block); | ||
836 | } | ||
837 | if (!++zone_count[block]) | ||
838 | zone_count[block]--; | ||
839 | return block; | ||
840 | } | ||
841 | |||
842 | #ifdef CONFIG_FEATURE_MINIX2 | ||
843 | static int add_zone2(uint32_t *znr, int *corrected) | ||
844 | { | ||
845 | int result; | ||
846 | int block; | ||
847 | |||
848 | result = 0; | ||
849 | block = check_zone_nr2(znr, corrected); | ||
850 | if (!block) | ||
851 | return 0; | ||
852 | if (zone_count[block]) { | ||
853 | printf("Already used block is reused in file '%s'. ", | ||
854 | current_name); | ||
855 | if (ask("Clear", 1)) { | ||
856 | *znr = 0; | ||
857 | block = 0; | ||
858 | *corrected = 1; | ||
859 | return 0; | ||
860 | } | ||
861 | } | ||
862 | if (!zone_in_use(block)) { | ||
863 | printf("Block %d in file '%s' is marked as 'unused'. ", | ||
864 | block, current_name); | ||
865 | if (ask("Correct", 1)) | ||
866 | mark_zone(block); | ||
867 | } | ||
868 | if (!++zone_count[block]) | ||
869 | zone_count[block]--; | ||
870 | return block; | ||
871 | } | ||
872 | #endif | ||
873 | |||
874 | static void add_zone_ind(uint16_t *znr, int *corrected) | ||
875 | { | ||
876 | static char blk[BLOCK_SIZE]; | ||
877 | int i, chg_blk = 0; | ||
878 | int block; | ||
879 | |||
880 | block = add_zone(znr, corrected); | ||
881 | if (!block) | ||
882 | return; | ||
883 | read_block(block, blk); | ||
884 | for (i = 0; i < (BLOCK_SIZE >> 1); i++) | ||
885 | add_zone(i + (uint16_t *) blk, &chg_blk); | ||
886 | if (chg_blk) | ||
887 | write_block(block, blk); | ||
888 | } | ||
889 | |||
890 | #ifdef CONFIG_FEATURE_MINIX2 | ||
891 | static void add_zone_ind2(uint32_t *znr, int *corrected) | ||
892 | { | ||
893 | static char blk[BLOCK_SIZE]; | ||
894 | int i, chg_blk = 0; | ||
895 | int block; | ||
896 | |||
897 | block = add_zone2(znr, corrected); | ||
898 | if (!block) | ||
899 | return; | ||
900 | read_block(block, blk); | ||
901 | for (i = 0; i < BLOCK_SIZE >> 2; i++) | ||
902 | add_zone2(i + (uint32_t *) blk, &chg_blk); | ||
903 | if (chg_blk) | ||
904 | write_block(block, blk); | ||
905 | } | ||
906 | #endif | ||
907 | |||
908 | static void add_zone_dind(uint16_t *znr, int *corrected) | ||
909 | { | ||
910 | static char blk[BLOCK_SIZE]; | ||
911 | int i, blk_chg = 0; | ||
912 | int block; | ||
913 | |||
914 | block = add_zone(znr, corrected); | ||
915 | if (!block) | ||
916 | return; | ||
917 | read_block(block, blk); | ||
918 | for (i = 0; i < (BLOCK_SIZE >> 1); i++) | ||
919 | add_zone_ind(i + (uint16_t *) blk, &blk_chg); | ||
920 | if (blk_chg) | ||
921 | write_block(block, blk); | ||
922 | } | ||
923 | |||
924 | #ifdef CONFIG_FEATURE_MINIX2 | ||
925 | static void add_zone_dind2(uint32_t *znr, int *corrected) | ||
926 | { | ||
927 | static char blk[BLOCK_SIZE]; | ||
928 | int i, blk_chg = 0; | ||
929 | int block; | ||
930 | |||
931 | block = add_zone2(znr, corrected); | ||
932 | if (!block) | ||
933 | return; | ||
934 | read_block(block, blk); | ||
935 | for (i = 0; i < BLOCK_SIZE >> 2; i++) | ||
936 | add_zone_ind2(i + (uint32_t *) blk, &blk_chg); | ||
937 | if (blk_chg) | ||
938 | write_block(block, blk); | ||
939 | } | ||
940 | |||
941 | static void add_zone_tind2(uint32_t *znr, int *corrected) | ||
942 | { | ||
943 | static char blk[BLOCK_SIZE]; | ||
944 | int i, blk_chg = 0; | ||
945 | int block; | ||
946 | |||
947 | block = add_zone2(znr, corrected); | ||
948 | if (!block) | ||
949 | return; | ||
950 | read_block(block, blk); | ||
951 | for (i = 0; i < BLOCK_SIZE >> 2; i++) | ||
952 | add_zone_dind2(i + (uint32_t *) blk, &blk_chg); | ||
953 | if (blk_chg) | ||
954 | write_block(block, blk); | ||
955 | } | ||
956 | #endif | ||
957 | |||
958 | static void check_zones(unsigned int i) | ||
959 | { | ||
960 | struct minix_inode *inode; | ||
961 | |||
962 | if (!i || i > INODES) | ||
963 | return; | ||
964 | if (inode_count[i] > 1) /* have we counted this file already? */ | ||
965 | return; | ||
966 | inode = Inode + i; | ||
967 | if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) && | ||
968 | !S_ISLNK(inode->i_mode)) return; | ||
969 | for (i = 0; i < 7; i++) | ||
970 | add_zone(i + inode->i_zone, &changed); | ||
971 | add_zone_ind(7 + inode->i_zone, &changed); | ||
972 | add_zone_dind(8 + inode->i_zone, &changed); | ||
973 | } | ||
974 | |||
975 | #ifdef CONFIG_FEATURE_MINIX2 | ||
976 | static void check_zones2(unsigned int i) | ||
977 | { | ||
978 | struct minix2_inode *inode; | ||
979 | |||
980 | if (!i || i > INODES) | ||
981 | return; | ||
982 | if (inode_count[i] > 1) /* have we counted this file already? */ | ||
983 | return; | ||
984 | inode = Inode2 + i; | ||
985 | if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) | ||
986 | && !S_ISLNK(inode->i_mode)) | ||
987 | return; | ||
988 | for (i = 0; i < 7; i++) | ||
989 | add_zone2(i + inode->i_zone, &changed); | ||
990 | add_zone_ind2(7 + inode->i_zone, &changed); | ||
991 | add_zone_dind2(8 + inode->i_zone, &changed); | ||
992 | add_zone_tind2(9 + inode->i_zone, &changed); | ||
993 | } | ||
994 | #endif | ||
995 | |||
996 | static void check_file(struct minix_inode *dir, unsigned int offset) | ||
997 | { | ||
998 | static char blk[BLOCK_SIZE]; | ||
999 | struct minix_inode *inode; | ||
1000 | int ino; | ||
1001 | char *name; | ||
1002 | int block; | ||
1003 | |||
1004 | block = map_block(dir, offset / BLOCK_SIZE); | ||
1005 | read_block(block, blk); | ||
1006 | name = blk + (offset % BLOCK_SIZE) + 2; | ||
1007 | ino = *(uint16_t *) (name - 2); | ||
1008 | if (ino > INODES) { | ||
1009 | printf("%s contains a bad inode number for file '%.*s'. ", | ||
1010 | current_name, namelen, name); | ||
1011 | if (ask("Remove", 1)) { | ||
1012 | *(uint16_t *) (name - 2) = 0; | ||
1013 | write_block(block, blk); | ||
1014 | } | ||
1015 | ino = 0; | ||
1016 | } | ||
1017 | push_filename(name); | ||
1018 | inode = get_inode(ino); | ||
1019 | pop_filename(); | ||
1020 | if (!offset) { | ||
1021 | if (!inode || strcmp(".", name)) { | ||
1022 | printf("%s: bad directory: '.' isn't first\n", current_name); | ||
1023 | errors_uncorrected = 1; | ||
1024 | } else | ||
1025 | return; | ||
1026 | } | ||
1027 | if (offset == dirsize) { | ||
1028 | if (!inode || strcmp("..", name)) { | ||
1029 | printf("%s: bad directory: '..' isn't second\n", current_name); | ||
1030 | errors_uncorrected = 1; | ||
1031 | } else | ||
1032 | return; | ||
1033 | } | ||
1034 | if (!inode) | ||
1035 | return; | ||
1036 | push_filename(name); | ||
1037 | if (list) { | ||
1038 | if (verbose) | ||
1039 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks); | ||
1040 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : ""); | ||
1041 | } | ||
1042 | check_zones(ino); | ||
1043 | if (inode && S_ISDIR(inode->i_mode)) | ||
1044 | recursive_check(ino); | ||
1045 | pop_filename(); | ||
1046 | return; | ||
1047 | } | ||
1048 | |||
1049 | #ifdef CONFIG_FEATURE_MINIX2 | ||
1050 | static void check_file2(struct minix2_inode *dir, unsigned int offset) | ||
1051 | { | ||
1052 | static char blk[BLOCK_SIZE]; | ||
1053 | struct minix2_inode *inode; | ||
1054 | int ino; | ||
1055 | char *name; | ||
1056 | int block; | ||
1057 | |||
1058 | block = map_block2(dir, offset / BLOCK_SIZE); | ||
1059 | read_block(block, blk); | ||
1060 | name = blk + (offset % BLOCK_SIZE) + 2; | ||
1061 | ino = *(uint16_t *) (name - 2); | ||
1062 | if (ino > INODES) { | ||
1063 | printf("%s contains a bad inode number for file '%.*s'. ", | ||
1064 | current_name, namelen, name); | ||
1065 | if (ask("Remove", 1)) { | ||
1066 | *(uint16_t *) (name - 2) = 0; | ||
1067 | write_block(block, blk); | ||
1068 | } | ||
1069 | ino = 0; | ||
1070 | } | ||
1071 | push_filename(name); | ||
1072 | inode = get_inode2(ino); | ||
1073 | pop_filename(); | ||
1074 | if (!offset) { | ||
1075 | if (!inode || strcmp(".", name)) { | ||
1076 | printf("%s: bad directory: '.' isn't first\n", current_name); | ||
1077 | errors_uncorrected = 1; | ||
1078 | } else | ||
1079 | return; | ||
1080 | } | ||
1081 | if (offset == dirsize) { | ||
1082 | if (!inode || strcmp("..", name)) { | ||
1083 | printf("%s: bad directory: '..' isn't second\n", current_name); | ||
1084 | errors_uncorrected = 1; | ||
1085 | } else | ||
1086 | return; | ||
1087 | } | ||
1088 | if (!inode) | ||
1089 | return; | ||
1090 | push_filename(name); | ||
1091 | if (list) { | ||
1092 | if (verbose) | ||
1093 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks); | ||
1094 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : ""); | ||
1095 | } | ||
1096 | check_zones2(ino); | ||
1097 | if (inode && S_ISDIR(inode->i_mode)) | ||
1098 | recursive_check2(ino); | ||
1099 | pop_filename(); | ||
1100 | return; | ||
1101 | } | ||
1102 | #endif | ||
1103 | |||
1104 | static void recursive_check(unsigned int ino) | ||
1105 | { | ||
1106 | struct minix_inode *dir; | ||
1107 | unsigned int offset; | ||
1108 | |||
1109 | dir = Inode + ino; | ||
1110 | if (!S_ISDIR(dir->i_mode)) | ||
1111 | die("Internal error"); | ||
1112 | if (dir->i_size < 2 * dirsize) { | ||
1113 | printf("%s: bad directory: size<32", current_name); | ||
1114 | errors_uncorrected = 1; | ||
1115 | } | ||
1116 | for (offset = 0; offset < dir->i_size; offset += dirsize) | ||
1117 | check_file(dir, offset); | ||
1118 | } | ||
1119 | |||
1120 | #ifdef CONFIG_FEATURE_MINIX2 | ||
1121 | static void recursive_check2(unsigned int ino) | ||
1122 | { | ||
1123 | struct minix2_inode *dir; | ||
1124 | unsigned int offset; | ||
1125 | |||
1126 | dir = Inode2 + ino; | ||
1127 | if (!S_ISDIR(dir->i_mode)) | ||
1128 | die("Internal error"); | ||
1129 | if (dir->i_size < 2 * dirsize) { | ||
1130 | printf("%s: bad directory: size<32", current_name); | ||
1131 | errors_uncorrected = 1; | ||
1132 | } | ||
1133 | for (offset = 0; offset < dir->i_size; offset += dirsize) | ||
1134 | check_file2(dir, offset); | ||
1135 | } | ||
1136 | #endif | ||
1137 | |||
1138 | static int bad_zone(int i) | ||
1139 | { | ||
1140 | char buffer[1024]; | ||
1141 | |||
1142 | if (BLOCK_SIZE * i != lseek(IN, BLOCK_SIZE * i, SEEK_SET)) | ||
1143 | die("Seek failed in bad_zone"); | ||
1144 | return (BLOCK_SIZE != read(IN, buffer, BLOCK_SIZE)); | ||
1145 | } | ||
1146 | |||
1147 | static void check_counts(void) | ||
1148 | { | ||
1149 | int i; | ||
1150 | |||
1151 | for (i = 1; i <= INODES; i++) { | ||
1152 | if (warn_mode && Inode[i].i_mode && !inode_in_use(i)) { | ||
1153 | printf("Inode %d has non-zero mode. ", i); | ||
1154 | if (ask("Clear", 1)) { | ||
1155 | Inode[i].i_mode = 0; | ||
1156 | changed = 1; | ||
1157 | } | ||
1158 | } | ||
1159 | if (!inode_count[i]) { | ||
1160 | if (!inode_in_use(i)) | ||
1161 | continue; | ||
1162 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i); | ||
1163 | if (ask("Clear", 1)) | ||
1164 | unmark_inode(i); | ||
1165 | continue; | ||
1166 | } | ||
1167 | if (!inode_in_use(i)) { | ||
1168 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i); | ||
1169 | if (ask("Set", 1)) | ||
1170 | mark_inode(i); | ||
1171 | } | ||
1172 | if (Inode[i].i_nlinks != inode_count[i]) { | ||
1173 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ", | ||
1174 | i, Inode[i].i_mode, Inode[i].i_nlinks, inode_count[i]); | ||
1175 | if (ask("Set i_nlinks to count", 1)) { | ||
1176 | Inode[i].i_nlinks = inode_count[i]; | ||
1177 | changed = 1; | ||
1178 | } | ||
1179 | } | ||
1180 | } | ||
1181 | for (i = FIRSTZONE; i < ZONES; i++) { | ||
1182 | if (zone_in_use(i) == zone_count[i]) | ||
1183 | continue; | ||
1184 | if (!zone_count[i]) { | ||
1185 | if (bad_zone(i)) | ||
1186 | continue; | ||
1187 | printf("Zone %d is marked 'in use', but no file uses it. ", i); | ||
1188 | if (ask("Unmark", 1)) | ||
1189 | unmark_zone(i); | ||
1190 | continue; | ||
1191 | } | ||
1192 | printf("Zone %d: %sin use, counted=%d\n", | ||
1193 | i, zone_in_use(i) ? "" : "not ", zone_count[i]); | ||
1194 | } | ||
1195 | } | ||
1196 | |||
1197 | #ifdef CONFIG_FEATURE_MINIX2 | ||
1198 | static void check_counts2(void) | ||
1199 | { | ||
1200 | int i; | ||
1201 | |||
1202 | for (i = 1; i <= INODES; i++) { | ||
1203 | if (warn_mode && Inode2[i].i_mode && !inode_in_use(i)) { | ||
1204 | printf("Inode %d has non-zero mode. ", i); | ||
1205 | if (ask("Clear", 1)) { | ||
1206 | Inode2[i].i_mode = 0; | ||
1207 | changed = 1; | ||
1208 | } | ||
1209 | } | ||
1210 | if (!inode_count[i]) { | ||
1211 | if (!inode_in_use(i)) | ||
1212 | continue; | ||
1213 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i); | ||
1214 | if (ask("Clear", 1)) | ||
1215 | unmark_inode(i); | ||
1216 | continue; | ||
1217 | } | ||
1218 | if (!inode_in_use(i)) { | ||
1219 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i); | ||
1220 | if (ask("Set", 1)) | ||
1221 | mark_inode(i); | ||
1222 | } | ||
1223 | if (Inode2[i].i_nlinks != inode_count[i]) { | ||
1224 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ", | ||
1225 | i, Inode2[i].i_mode, Inode2[i].i_nlinks, | ||
1226 | inode_count[i]); | ||
1227 | if (ask("Set i_nlinks to count", 1)) { | ||
1228 | Inode2[i].i_nlinks = inode_count[i]; | ||
1229 | changed = 1; | ||
1230 | } | ||
1231 | } | ||
1232 | } | ||
1233 | for (i = FIRSTZONE; i < ZONES; i++) { | ||
1234 | if (zone_in_use(i) == zone_count[i]) | ||
1235 | continue; | ||
1236 | if (!zone_count[i]) { | ||
1237 | if (bad_zone(i)) | ||
1238 | continue; | ||
1239 | printf("Zone %d is marked 'in use', but no file uses it. ", i); | ||
1240 | if (ask("Unmark", 1)) | ||
1241 | unmark_zone(i); | ||
1242 | continue; | ||
1243 | } | ||
1244 | printf("Zone %d: %sin use, counted=%d\n", | ||
1245 | i, zone_in_use(i) ? "" : "not ", zone_count[i]); | ||
1246 | } | ||
1247 | } | ||
1248 | #endif | ||
1249 | |||
1250 | static void check(void) | ||
1251 | { | ||
1252 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count)); | ||
1253 | memset(zone_count, 0, ZONES * sizeof(*zone_count)); | ||
1254 | check_zones(ROOT_INO); | ||
1255 | recursive_check(ROOT_INO); | ||
1256 | check_counts(); | ||
1257 | } | ||
1258 | |||
1259 | #ifdef CONFIG_FEATURE_MINIX2 | ||
1260 | static void check2(void) | ||
1261 | { | ||
1262 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count)); | ||
1263 | memset(zone_count, 0, ZONES * sizeof(*zone_count)); | ||
1264 | check_zones2(ROOT_INO); | ||
1265 | recursive_check2(ROOT_INO); | ||
1266 | check_counts2(); | ||
1267 | } | ||
1268 | #endif | ||
1269 | |||
1270 | int fsck_minix_main(int argc, char **argv) | ||
1271 | { | ||
1272 | struct termios tmp; | ||
1273 | int retcode = 0; | ||
1274 | |||
1275 | alloc_current_name(); | ||
1276 | #ifdef CONFIG_FEATURE_CLEAN_UP | ||
1277 | /* Don't bother to free memory. Exit does | ||
1278 | * that automagically, so we can save a few bytes */ | ||
1279 | atexit(free_current_name); | ||
1280 | #endif | ||
1281 | |||
1282 | if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE) | ||
1283 | die("Bad inode size"); | ||
1284 | #ifdef CONFIG_FEATURE_MINIX2 | ||
1285 | if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) | ||
1286 | die("Bad v2 inode size"); | ||
1287 | #endif | ||
1288 | while (argc-- > 1) { | ||
1289 | argv++; | ||
1290 | if (argv[0][0] != '-') { | ||
1291 | if (device_name) | ||
1292 | bb_show_usage(); | ||
1293 | else | ||
1294 | device_name = argv[0]; | ||
1295 | } else | ||
1296 | while (*++argv[0]) | ||
1297 | switch (argv[0][0]) { | ||
1298 | case 'l': | ||
1299 | list = 1; | ||
1300 | break; | ||
1301 | case 'a': | ||
1302 | automatic = 1; | ||
1303 | repair = 1; | ||
1304 | break; | ||
1305 | case 'r': | ||
1306 | automatic = 0; | ||
1307 | repair = 1; | ||
1308 | break; | ||
1309 | case 'v': | ||
1310 | verbose = 1; | ||
1311 | break; | ||
1312 | case 's': | ||
1313 | show = 1; | ||
1314 | break; | ||
1315 | case 'm': | ||
1316 | warn_mode = 1; | ||
1317 | break; | ||
1318 | case 'f': | ||
1319 | force = 1; | ||
1320 | break; | ||
1321 | default: | ||
1322 | bb_show_usage(); | ||
1323 | } | ||
1324 | } | ||
1325 | if (!device_name) | ||
1326 | bb_show_usage(); | ||
1327 | check_mount(); /* trying to check a mounted filesystem? */ | ||
1328 | if (repair && !automatic) { | ||
1329 | if (!isatty(0) || !isatty(1)) | ||
1330 | die("Need terminal for interactive repairs"); | ||
1331 | } | ||
1332 | IN = open(device_name, repair ? O_RDWR : O_RDONLY); | ||
1333 | if (IN < 0){ | ||
1334 | printf("Unable to open device '%s'\n", device_name); | ||
1335 | leave(8); | ||
1336 | } | ||
1337 | sync(); /* paranoia? */ | ||
1338 | read_superblock(); | ||
1339 | |||
1340 | /* | ||
1341 | * Determine whether or not we should continue with the checking. | ||
1342 | * This is based on the status of the filesystem valid and error | ||
1343 | * flags and whether or not the -f switch was specified on the | ||
1344 | * command line. | ||
1345 | */ | ||
1346 | printf("%s, %s\n", applet_name, program_version); | ||
1347 | if (!(Super.s_state & MINIX_ERROR_FS) && | ||
1348 | (Super.s_state & MINIX_VALID_FS) && !force) { | ||
1349 | if (repair) | ||
1350 | printf("%s is clean, check is skipped\n", device_name); | ||
1351 | return retcode; | ||
1352 | } else if (force) | ||
1353 | printf("Forcing filesystem check on %s\n", device_name); | ||
1354 | else if (repair) | ||
1355 | printf("Filesystem on %s is dirty, needs checking\n", | ||
1356 | device_name); | ||
1357 | |||
1358 | read_tables(); | ||
1359 | |||
1360 | if (repair && !automatic) { | ||
1361 | tcgetattr(0, &termios); | ||
1362 | tmp = termios; | ||
1363 | tmp.c_lflag &= ~(ICANON | ECHO); | ||
1364 | tcsetattr(0, TCSANOW, &tmp); | ||
1365 | termios_set = 1; | ||
1366 | } | ||
1367 | #ifdef CONFIG_FEATURE_MINIX2 | ||
1368 | if (version2) { | ||
1369 | check_root2(); | ||
1370 | check2(); | ||
1371 | } else | ||
1372 | #endif | ||
1373 | { | ||
1374 | check_root(); | ||
1375 | check(); | ||
1376 | } | ||
1377 | if (verbose) { | ||
1378 | int i, free_cnt; | ||
1379 | |||
1380 | for (i = 1, free_cnt = 0; i <= INODES; i++) | ||
1381 | if (!inode_in_use(i)) | ||
1382 | free_cnt++; | ||
1383 | printf("\n%6ld inodes used (%ld%%)\n", (INODES - free_cnt), | ||
1384 | 100 * (INODES - free_cnt) / INODES); | ||
1385 | for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++) | ||
1386 | if (!zone_in_use(i)) | ||
1387 | free_cnt++; | ||
1388 | printf("%6ld zones used (%ld%%)\n\n" | ||
1389 | "%6d regular files\n" | ||
1390 | "%6d directories\n" | ||
1391 | "%6d character device files\n" | ||
1392 | "%6d block device files\n" | ||
1393 | "%6d links\n" | ||
1394 | "%6d symbolic links\n" | ||
1395 | "------\n" | ||
1396 | "%6d files\n", | ||
1397 | (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES, | ||
1398 | regular, directory, chardev, blockdev, | ||
1399 | links - 2 * directory + 1, symlinks, | ||
1400 | total - 2 * directory + 1); | ||
1401 | } | ||
1402 | if (changed) { | ||
1403 | write_tables(); | ||
1404 | printf("FILE SYSTEM HAS BEEN CHANGED\n"); | ||
1405 | sync(); | ||
1406 | } else if (repair) | ||
1407 | write_super_block(); | ||
1408 | |||
1409 | if (repair && !automatic) | ||
1410 | tcsetattr(0, TCSANOW, &termios); | ||
1411 | |||
1412 | if (changed) | ||
1413 | retcode += 3; | ||
1414 | if (errors_uncorrected) | ||
1415 | retcode += 4; | ||
1416 | return retcode; | ||
1417 | } | ||