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1/*
2 * fsck.c - a file system consistency checker for Linux.
3 *
4 * (C) 1991, 1992 Linus Torvalds. This file may be redistributed
5 * as per the GNU copyleft.
6 */
7
8/*
9 * 09.11.91 - made the first rudimetary functions
10 *
11 * 10.11.91 - updated, does checking, no repairs yet.
12 * Sent out to the mailing-list for testing.
13 *
14 * 14.11.91 - Testing seems to have gone well. Added some
15 * correction-code, and changed some functions.
16 *
17 * 15.11.91 - More correction code. Hopefully it notices most
18 * cases now, and tries to do something about them.
19 *
20 * 16.11.91 - More corrections (thanks to Mika Jalava). Most
21 * things seem to work now. Yeah, sure.
22 *
23 *
24 * 19.04.92 - Had to start over again from this old version, as a
25 * kernel bug ate my enhanced fsck in february.
26 *
27 * 28.02.93 - added support for different directory entry sizes..
28 *
29 * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
30 * super-block information
31 *
32 * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
33 * to that required by fsutil
34 *
35 * Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu)
36 * Added support for file system valid flag. Also
37 * added program_version variable and output of
38 * program name and version number when program
39 * is executed.
40 *
41 * 30.10.94 - added support for v2 filesystem
42 * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
43 *
44 * 10.12.94 - added test to prevent checking of mounted fs adapted
45 * from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck
46 * program. (Daniel Quinlan, quinlan@yggdrasil.com)
47 *
48 * 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such
49 * for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
50 *
51 * 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
52 * (Russell King). He made them for ARM. It would seem
53 * that the ARM is powerful enough to do this in C whereas
54 * i386 and m64k must use assembly to get it fast >:-)
55 * This should make minix fsck systemindependent.
56 * (janl@math.uio.no, Nicolai Langfeldt)
57 *
58 * 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler
59 * warnings. Added mc68k bitops from
60 * Joerg Dorchain <dorchain@mpi-sb.mpg.de>.
61 *
62 * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by
63 * Andreas Schwab.
64 *
65 * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
66 * - added Native Language Support
67 *
68 *
69 * I've had no time to add comments - hopefully the function names
70 * are comments enough. As with all file system checkers, this assumes
71 * the file system is quiescent - don't use it on a mounted device
72 * unless you can be sure nobody is writing to it (and remember that the
73 * kernel can write to it when it searches for files).
74 *
75 * Usuage: fsck [-larvsm] device
76 * -l for a listing of all the filenames
77 * -a for automatic repairs (not implemented)
78 * -r for repairs (interactive) (not implemented)
79 * -v for verbose (tells how many files)
80 * -s for super-block info
81 * -m for minix-like "mode not cleared" warnings
82 * -f force filesystem check even if filesystem marked as valid
83 *
84 * The device may be a block device or a image of one, but this isn't
85 * enforced (but it's not much fun on a character device :-).
86 */
87
88#include <stdio.h>
89#include <errno.h>
90#include <unistd.h>
91#include <string.h>
92#include <fcntl.h>
93#include <ctype.h>
94#include <stdlib.h>
95#include <termios.h>
96#include <mntent.h>
97#include <sys/stat.h>
98
99#include <linux/fs.h>
100#include <linux/minix_fs.h>
101#include "../version.h"
102#include "nls.h"
103
104#ifdef MINIX2_SUPER_MAGIC2
105#define HAVE_MINIX2 1
106#endif
107
108#ifndef __linux__
109#define volatile
110#endif
111
112#define ROOT_INO 1
113
114#define UPPER(size,n) ((size+((n)-1))/(n))
115#define INODE_SIZE (sizeof(struct minix_inode))
116#ifdef HAVE_MINIX2
117#define INODE_SIZE2 (sizeof(struct minix2_inode))
118#define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
119 : MINIX_INODES_PER_BLOCK))
120#else
121#define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
122#endif
123#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
124
125#define BITS_PER_BLOCK (BLOCK_SIZE<<3)
126
127static char * program_name = "fsck.minix";
128static char * program_version = "1.2 - 11/11/96";
129static char * device_name = NULL;
130static int IN;
131static int repair=0, automatic=0, verbose=0, list=0, show=0, warn_mode=0,
132 force=0;
133static int directory=0, regular=0, blockdev=0, chardev=0, links=0,
134 symlinks=0, total=0;
135
136static int changed = 0; /* flags if the filesystem has been changed */
137static int errors_uncorrected = 0; /* flag if some error was not corrected */
138static int dirsize = 16;
139static int namelen = 14;
140static int version2 = 0;
141static struct termios termios;
142static int termios_set = 0;
143
144/* File-name data */
145#define MAX_DEPTH 50
146static int name_depth = 0;
147static char name_list[MAX_DEPTH][NAME_MAX+1];
148
149static char * inode_buffer = NULL;
150#define Inode (((struct minix_inode *) inode_buffer)-1)
151#define Inode2 (((struct minix2_inode *) inode_buffer)-1)
152static char super_block_buffer[BLOCK_SIZE];
153#define Super (*(struct minix_super_block *)super_block_buffer)
154#define INODES ((unsigned long)Super.s_ninodes)
155#ifdef HAVE_MINIX2
156#define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones))
157#else
158#define ZONES ((unsigned long)(Super.s_nzones))
159#endif
160#define IMAPS ((unsigned long)Super.s_imap_blocks)
161#define ZMAPS ((unsigned long)Super.s_zmap_blocks)
162#define FIRSTZONE ((unsigned long)Super.s_firstdatazone)
163#define ZONESIZE ((unsigned long)Super.s_log_zone_size)
164#define MAXSIZE ((unsigned long)Super.s_max_size)
165#define MAGIC (Super.s_magic)
166#define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
167
168static char *inode_map;
169static char *zone_map;
170
171static unsigned char * inode_count = NULL;
172static unsigned char * zone_count = NULL;
173
174void recursive_check(unsigned int ino);
175void recursive_check2(unsigned int ino);
176
177#include "bitops.h"
178
179#define inode_in_use(x) (bit(inode_map,(x)))
180#define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
181
182#define mark_inode(x) (setbit(inode_map,(x)),changed=1)
183#define unmark_inode(x) (clrbit(inode_map,(x)),changed=1)
184
185#define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1),changed=1)
186#define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1),changed=1)
187
188void leave(int) __attribute__ ((noreturn));
189void leave(int status)
190{
191 if (termios_set)
192 tcsetattr(0, TCSANOW, &termios);
193 exit(status);
194}
195
196void usage(void) {
197 fprintf(stderr,
198 _("Usage: %s [-larvsmf] /dev/name\n"),
199 program_name);
200 leave(16);
201}
202
203void die(const char *str) {
204 fprintf(stderr, "%s: %s\n", program_name, str);
205 leave(8);
206}
207
208/*
209 * This simply goes through the file-name data and prints out the
210 * current file.
211 */
212void print_current_name(void)
213{
214 int i=0;
215
216 while (i<name_depth)
217 printf("/%.*s",namelen,name_list[i++]);
218 if (i == 0)
219 printf ("/");
220}
221
222int ask(const char * string, int def)
223{
224 int c;
225
226 if (!repair) {
227 printf("\n");
228 errors_uncorrected = 1;
229 return 0;
230 }
231 if (automatic) {
232 printf("\n");
233 if (!def)
234 errors_uncorrected = 1;
235 return def;
236 }
237 printf(def?"%s (y/n)? ":"%s (n/y)? ",string);
238 for (;;) {
239 fflush(stdout);
240 if ((c=getchar())==EOF) {
241 if (!def)
242 errors_uncorrected = 1;
243 return def;
244 }
245 c=toupper(c);
246 if (c == 'Y') {
247 def = 1;
248 break;
249 } else if (c == 'N') {
250 def = 0;
251 break;
252 } else if (c == ' ' || c == '\n')
253 break;
254 }
255 if (def)
256 printf("y\n");
257 else {
258 printf("n\n");
259 errors_uncorrected = 1;
260 }
261 return def;
262}
263
264/*
265 * Make certain that we aren't checking a filesystem that is on a
266 * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
267 * 1994 Theodore Ts'o. Also licensed under GPL.
268 */
269static void check_mount(void)
270{
271 FILE * f;
272 struct mntent * mnt;
273 int cont;
274 int fd;
275
276 if ((f = setmntent (MOUNTED, "r")) == NULL)
277 return;
278 while ((mnt = getmntent (f)) != NULL)
279 if (strcmp (device_name, mnt->mnt_fsname) == 0)
280 break;
281 endmntent (f);
282 if (!mnt)
283 return;
284
285 /*
286 * If the root is mounted read-only, then /etc/mtab is
287 * probably not correct; so we won't issue a warning based on
288 * it.
289 */
290 fd = open(MOUNTED, O_RDWR);
291 if (fd < 0 && errno == EROFS)
292 return;
293 else
294 close(fd);
295
296 printf (_("%s is mounted. "), device_name);
297 if (isatty(0) && isatty(1))
298 cont = ask(_("Do you really want to continue"), 0);
299 else
300 cont = 0;
301 if (!cont) {
302 printf (_("check aborted.\n"));
303 exit (0);
304 }
305 return;
306}
307
308/*
309 * check_zone_nr checks to see that *nr is a valid zone nr. If it
310 * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
311 * if an error was corrected, and returns the zone (0 for no zone
312 * or a bad zone-number).
313 */
314int check_zone_nr(unsigned short * nr, int * corrected)
315{
316 if (!*nr)
317 return 0;
318 if (*nr < FIRSTZONE)
319 printf(_("Zone nr < FIRSTZONE in file `"));
320 else if (*nr >= ZONES)
321 printf(_("Zone nr >= ZONES in file `"));
322 else
323 return *nr;
324 print_current_name();
325 printf("'.");
326 if (ask(_("Remove block"),1)) {
327 *nr = 0;
328 *corrected = 1;
329 }
330 return 0;
331}
332
333#ifdef HAVE_MINIX2
334int check_zone_nr2 (unsigned int *nr, int *corrected)
335{
336 if (!*nr)
337 return 0;
338 if (*nr < FIRSTZONE)
339 printf (_("Zone nr < FIRSTZONE in file `"));
340 else if (*nr >= ZONES)
341 printf (_("Zone nr >= ZONES in file `"));
342 else
343 return *nr;
344 print_current_name ();
345 printf ("'.");
346 if (ask (_("Remove block"), 1)) {
347 *nr = 0;
348 *corrected = 1;
349 }
350 return 0;
351}
352#endif
353
354/*
355 * read-block reads block nr into the buffer at addr.
356 */
357void read_block(unsigned int nr, char * addr)
358{
359 if (!nr) {
360 memset(addr,0,BLOCK_SIZE);
361 return;
362 }
363 if (BLOCK_SIZE*nr != lseek(IN, BLOCK_SIZE*nr, SEEK_SET)) {
364 printf(_("Read error: unable to seek to block in file '"));
365 print_current_name();
366 printf("'\n");
367 memset(addr,0,BLOCK_SIZE);
368 errors_uncorrected = 1;
369 } else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) {
370 printf(_("Read error: bad block in file '"));
371 print_current_name();
372 printf("'\n");
373 memset(addr,0,BLOCK_SIZE);
374 errors_uncorrected = 1;
375 }
376}
377
378/*
379 * write_block writes block nr to disk.
380 */
381void write_block(unsigned int nr, char * addr)
382{
383 if (!nr)
384 return;
385 if (nr < FIRSTZONE || nr >= ZONES) {
386 printf(_("Internal error: trying to write bad block\n"
387 "Write request ignored\n"));
388 errors_uncorrected = 1;
389 return;
390 }
391 if (BLOCK_SIZE*nr != lseek(IN, BLOCK_SIZE*nr, SEEK_SET))
392 die(_("seek failed in write_block"));
393 if (BLOCK_SIZE != write(IN, addr, BLOCK_SIZE)) {
394 printf(_("Write error: bad block in file '"));
395 print_current_name();
396 printf("'\n");
397 errors_uncorrected = 1;
398 }
399}
400
401/*
402 * map-block calculates the absolute block nr of a block in a file.
403 * It sets 'changed' if the inode has needed changing, and re-writes
404 * any indirect blocks with errors.
405 */
406int map_block(struct minix_inode * inode, unsigned int blknr)
407{
408 unsigned short ind[BLOCK_SIZE>>1];
409 unsigned short dind[BLOCK_SIZE>>1];
410 int blk_chg, block, result;
411
412 if (blknr<7)
413 return check_zone_nr(inode->i_zone + blknr, &changed);
414 blknr -= 7;
415 if (blknr<512) {
416 block = check_zone_nr(inode->i_zone + 7, &changed);
417 read_block(block, (char *) ind);
418 blk_chg = 0;
419 result = check_zone_nr(blknr + ind, &blk_chg);
420 if (blk_chg)
421 write_block(block, (char *) ind);
422 return result;
423 }
424 blknr -= 512;
425 block = check_zone_nr(inode->i_zone + 8, &changed);
426 read_block(block, (char *) dind);
427 blk_chg = 0;
428 result = check_zone_nr(dind + (blknr/512), &blk_chg);
429 if (blk_chg)
430 write_block(block, (char *) dind);
431 block = result;
432 read_block(block, (char *) ind);
433 blk_chg = 0;
434 result = check_zone_nr(ind + (blknr%512), &blk_chg);
435 if (blk_chg)
436 write_block(block, (char *) ind);
437 return result;
438}
439
440#ifdef HAVE_MINIX2
441int map_block2 (struct minix2_inode *inode, unsigned int blknr)
442{
443 unsigned int ind[BLOCK_SIZE >> 2];
444 unsigned int dind[BLOCK_SIZE >> 2];
445 unsigned int tind[BLOCK_SIZE >> 2];
446 int blk_chg, block, result;
447
448 if (blknr < 7)
449 return check_zone_nr2 (inode->i_zone + blknr, &changed);
450 blknr -= 7;
451 if (blknr < 256) {
452 block = check_zone_nr2 (inode->i_zone + 7, &changed);
453 read_block (block, (char *) ind);
454 blk_chg = 0;
455 result = check_zone_nr2 (blknr + ind, &blk_chg);
456 if (blk_chg)
457 write_block (block, (char *) ind);
458 return result;
459 }
460 blknr -= 256;
461 if (blknr >= 256 * 256) {
462 block = check_zone_nr2 (inode->i_zone + 8, &changed);
463 read_block (block, (char *) dind);
464 blk_chg = 0;
465 result = check_zone_nr2 (dind + blknr / 256, &blk_chg);
466 if (blk_chg)
467 write_block (block, (char *) dind);
468 block = result;
469 read_block (block, (char *) ind);
470 blk_chg = 0;
471 result = check_zone_nr2 (ind + blknr % 256, &blk_chg);
472 if (blk_chg)
473 write_block (block, (char *) ind);
474 return result;
475 }
476 blknr -= 256 * 256;
477 block = check_zone_nr2 (inode->i_zone + 9, &changed);
478 read_block (block, (char *) tind);
479 blk_chg = 0;
480 result = check_zone_nr2 (tind + blknr / (256 * 256), &blk_chg);
481 if (blk_chg)
482 write_block (block, (char *) tind);
483 block = result;
484 read_block (block, (char *) dind);
485 blk_chg = 0;
486 result = check_zone_nr2 (dind + (blknr / 256) % 256, &blk_chg);
487 if (blk_chg)
488 write_block (block, (char *) dind);
489 block = result;
490 read_block (block, (char *) ind);
491 blk_chg = 0;
492 result = check_zone_nr2 (ind + blknr % 256, &blk_chg);
493 if (blk_chg)
494 write_block (block, (char *) ind);
495 return result;
496}
497#endif
498
499void write_super_block(void)
500{
501 /*
502 * Set the state of the filesystem based on whether or not there
503 * are uncorrected errors. The filesystem valid flag is
504 * unconditionally set if we get this far.
505 */
506 Super.s_state |= MINIX_VALID_FS;
507 if ( errors_uncorrected )
508 Super.s_state |= MINIX_ERROR_FS;
509 else
510 Super.s_state &= ~MINIX_ERROR_FS;
511
512 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
513 die(_("seek failed in write_super_block"));
514 if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE))
515 die(_("unable to write super-block"));
516
517 return;
518}
519
520void write_tables(void)
521{
522 write_super_block();
523
524 if (IMAPS*BLOCK_SIZE != write(IN,inode_map,IMAPS*BLOCK_SIZE))
525 die(_("Unable to write inode map"));
526 if (ZMAPS*BLOCK_SIZE != write(IN,zone_map,ZMAPS*BLOCK_SIZE))
527 die(_("Unable to write zone map"));
528 if (INODE_BUFFER_SIZE != write(IN,inode_buffer,INODE_BUFFER_SIZE))
529 die(_("Unable to write inodes"));
530}
531
532void get_dirsize (void)
533{
534 int block;
535 char blk[BLOCK_SIZE];
536 int size;
537
538#if HAVE_MINIX2
539 if (version2)
540 block = Inode2[ROOT_INO].i_zone[0];
541 else
542#endif
543 block = Inode[ROOT_INO].i_zone[0];
544 read_block (block, blk);
545 for (size = 16; size < BLOCK_SIZE; size <<= 1) {
546 if (strcmp (blk + size + 2, "..") == 0) {
547 dirsize = size;
548 namelen = size - 2;
549 return;
550 }
551 }
552 /* use defaults */
553}
554
555void read_superblock(void)
556{
557 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
558 die(_("seek failed"));
559 if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE))
560 die(_("unable to read super block"));
561 if (MAGIC == MINIX_SUPER_MAGIC) {
562 namelen = 14;
563 dirsize = 16;
564 version2 = 0;
565 } else if (MAGIC == MINIX_SUPER_MAGIC2) {
566 namelen = 30;
567 dirsize = 32;
568 version2 = 0;
569#ifdef HAVE_MINIX2
570 } else if (MAGIC == MINIX2_SUPER_MAGIC) {
571 namelen = 14;
572 dirsize = 16;
573 version2 = 1;
574 } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
575 namelen = 30;
576 dirsize = 32;
577 version2 = 1;
578#endif
579 } else
580 die(_("bad magic number in super-block"));
581 if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
582 die(_("Only 1k blocks/zones supported"));
583 if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
584 die(_("bad s_imap_blocks field in super-block"));
585 if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
586 die(_("bad s_zmap_blocks field in super-block"));
587}
588
589void read_tables(void)
590{
591 inode_map = malloc(IMAPS * BLOCK_SIZE);
592 if (!inode_map)
593 die(_("Unable to allocate buffer for inode map"));
594 zone_map = malloc(ZMAPS * BLOCK_SIZE);
595 if (!inode_map)
596 die("Unable to allocate buffer for zone map");
597 memset(inode_map,0,sizeof(inode_map));
598 memset(zone_map,0,sizeof(zone_map));
599 inode_buffer = malloc(INODE_BUFFER_SIZE);
600 if (!inode_buffer)
601 die(_("Unable to allocate buffer for inodes"));
602 inode_count = malloc(INODES + 1);
603 if (!inode_count)
604 die(_("Unable to allocate buffer for inode count"));
605 zone_count = malloc(ZONES);
606 if (!zone_count)
607 die(_("Unable to allocate buffer for zone count"));
608 if (IMAPS*BLOCK_SIZE != read(IN,inode_map,IMAPS*BLOCK_SIZE))
609 die(_("Unable to read inode map"));
610 if (ZMAPS*BLOCK_SIZE != read(IN,zone_map,ZMAPS*BLOCK_SIZE))
611 die(_("Unable to read zone map"));
612 if (INODE_BUFFER_SIZE != read(IN,inode_buffer,INODE_BUFFER_SIZE))
613 die(_("Unable to read inodes"));
614 if (NORM_FIRSTZONE != FIRSTZONE) {
615 printf(_("Warning: Firstzone != Norm_firstzone\n"));
616 errors_uncorrected = 1;
617 }
618 get_dirsize ();
619 if (show) {
620 printf(_("%ld inodes\n"),INODES);
621 printf(_("%ld blocks\n"),ZONES);
622 printf(_("Firstdatazone=%ld (%ld)\n"),FIRSTZONE,NORM_FIRSTZONE);
623 printf(_("Zonesize=%d\n"),BLOCK_SIZE<<ZONESIZE);
624 printf(_("Maxsize=%ld\n"),MAXSIZE);
625 printf(_("Filesystem state=%d\n"), Super.s_state);
626 printf(_("namelen=%d\n\n"),namelen);
627 }
628}
629
630struct minix_inode * get_inode(unsigned int nr)
631{
632 struct minix_inode * inode;
633
634 if (!nr || nr > INODES)
635 return NULL;
636 total++;
637 inode = Inode + nr;
638 if (!inode_count[nr]) {
639 if (!inode_in_use(nr)) {
640 printf(_("Inode %d marked not used, but used for file '"),
641 nr);
642 print_current_name();
643 printf("'\n");
644 if (repair) {
645 if (ask(_("Mark in use"),1))
646 mark_inode(nr);
647 } else {
648 errors_uncorrected = 1;
649 }
650 }
651 if (S_ISDIR(inode->i_mode))
652 directory++;
653 else if (S_ISREG(inode->i_mode))
654 regular++;
655 else if (S_ISCHR(inode->i_mode))
656 chardev++;
657 else if (S_ISBLK(inode->i_mode))
658 blockdev++;
659 else if (S_ISLNK(inode->i_mode))
660 symlinks++;
661 else if (S_ISSOCK(inode->i_mode))
662 ;
663 else if (S_ISFIFO(inode->i_mode))
664 ;
665 else {
666 print_current_name();
667 printf(_(" has mode %05o\n"),inode->i_mode);
668 }
669
670 } else
671 links++;
672 if (!++inode_count[nr]) {
673 printf(_("Warning: inode count too big.\n"));
674 inode_count[nr]--;
675 errors_uncorrected = 1;
676 }
677 return inode;
678}
679
680#ifdef HAVE_MINIX2
681struct minix2_inode *
682get_inode2 (unsigned int nr)
683{
684 struct minix2_inode *inode;
685
686 if (!nr || nr > INODES)
687 return NULL;
688 total++;
689 inode = Inode2 + nr;
690 if (!inode_count[nr]) {
691 if (!inode_in_use (nr)) {
692 printf (_("Inode %d marked not used, but used for file '"), nr);
693 print_current_name ();
694 printf ("'\n");
695 if (repair) {
696 if (ask (_("Mark in use"), 1))
697 mark_inode (nr);
698 else
699 errors_uncorrected = 1;
700 }
701 }
702 if (S_ISDIR (inode->i_mode))
703 directory++;
704 else if (S_ISREG (inode->i_mode))
705 regular++;
706 else if (S_ISCHR (inode->i_mode))
707 chardev++;
708 else if (S_ISBLK (inode->i_mode))
709 blockdev++;
710 else if (S_ISLNK (inode->i_mode))
711 symlinks++;
712 else if (S_ISSOCK (inode->i_mode));
713 else if (S_ISFIFO (inode->i_mode));
714 else {
715 print_current_name ();
716 printf (_(" has mode %05o\n"), inode->i_mode);
717 }
718 } else
719 links++;
720 if (!++inode_count[nr]) {
721 printf (_("Warning: inode count too big.\n"));
722 inode_count[nr]--;
723 errors_uncorrected = 1;
724 }
725 return inode;
726}
727#endif
728
729void check_root(void)
730{
731 struct minix_inode * inode = Inode + ROOT_INO;
732
733 if (!inode || !S_ISDIR(inode->i_mode))
734 die(_("root inode isn't a directory"));
735}
736
737#ifdef HAVE_MINIX2
738void check_root2 (void)
739{
740 struct minix2_inode *inode = Inode2 + ROOT_INO;
741
742 if (!inode || !S_ISDIR (inode->i_mode))
743 die ("root inode isn't a directory");
744}
745#endif
746
747static int add_zone(unsigned short * znr, int * corrected)
748{
749 int result;
750 int block;
751
752 result = 0;
753 block = check_zone_nr(znr, corrected);
754 if (!block)
755 return 0;
756 if (zone_count[block]) {
757 printf(_("Block has been used before. Now in file `"));
758 print_current_name();
759 printf("'.");
760 if (ask(_("Clear"),1)) {
761 *znr = 0;
762 block = 0;
763 *corrected = 1;
764 }
765 }
766 if (!block)
767 return 0;
768 if (!zone_in_use(block)) {
769 printf(_("Block %d in file `"),block);
770 print_current_name();
771 printf(_("' is marked not in use."));
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#ifdef HAVE_MINIX2
781static int add_zone2 (unsigned int *znr, int *corrected)
782{
783 int result;
784 int block;
785
786 result = 0;
787 block = check_zone_nr2 (znr, corrected);
788 if (!block)
789 return 0;
790 if (zone_count[block]) {
791 printf (_("Block has been used before. Now in file `"));
792 print_current_name ();
793 printf ("'.");
794 if (ask (_("Clear"), 1)) {
795 *znr = 0;
796 block = 0;
797 *corrected = 1;
798 }
799 }
800 if (!block)
801 return 0;
802 if (!zone_in_use (block)) {
803 printf (_("Block %d in file `"), block);
804 print_current_name ();
805 printf (_("' is marked not in use."));
806 if (ask (_("Correct"), 1))
807 mark_zone (block);
808 }
809 if (!++zone_count[block])
810 zone_count[block]--;
811 return block;
812}
813#endif
814
815static void add_zone_ind(unsigned short * znr, int * corrected)
816{
817 static char blk[BLOCK_SIZE];
818 int i, chg_blk=0;
819 int block;
820
821 block = add_zone(znr, corrected);
822 if (!block)
823 return;
824 read_block(block, blk);
825 for (i=0 ; i < (BLOCK_SIZE>>1) ; i++)
826 add_zone(i + (unsigned short *) blk, &chg_blk);
827 if (chg_blk)
828 write_block(block, blk);
829}
830
831#ifdef HAVE_MINIX2
832static void
833add_zone_ind2 (unsigned int *znr, int *corrected)
834{
835 static char blk[BLOCK_SIZE];
836 int i, chg_blk = 0;
837 int block;
838
839 block = add_zone2 (znr, corrected);
840 if (!block)
841 return;
842 read_block (block, blk);
843 for (i = 0; i < BLOCK_SIZE >> 2; i++)
844 add_zone2 (i + (unsigned int *) blk, &chg_blk);
845 if (chg_blk)
846 write_block (block, blk);
847}
848#endif
849
850static void add_zone_dind(unsigned short * znr, int * corrected)
851{
852 static char blk[BLOCK_SIZE];
853 int i, blk_chg=0;
854 int block;
855
856 block = add_zone(znr, corrected);
857 if (!block)
858 return;
859 read_block(block, blk);
860 for (i=0 ; i < (BLOCK_SIZE>>1) ; i++)
861 add_zone_ind(i + (unsigned short *) blk, &blk_chg);
862 if (blk_chg)
863 write_block(block, blk);
864}
865
866#ifdef HAVE_MINIX2
867static void
868add_zone_dind2 (unsigned int *znr, int *corrected)
869{
870 static char blk[BLOCK_SIZE];
871 int i, blk_chg = 0;
872 int block;
873
874 block = add_zone2 (znr, corrected);
875 if (!block)
876 return;
877 read_block (block, blk);
878 for (i = 0; i < BLOCK_SIZE >> 2; i++)
879 add_zone_ind2 (i + (unsigned int *) blk, &blk_chg);
880 if (blk_chg)
881 write_block (block, blk);
882}
883
884static void
885add_zone_tind2 (unsigned int *znr, int *corrected)
886{
887 static char blk[BLOCK_SIZE];
888 int i, blk_chg = 0;
889 int block;
890
891 block = add_zone2 (znr, corrected);
892 if (!block)
893 return;
894 read_block (block, blk);
895 for (i = 0; i < BLOCK_SIZE >> 2; i++)
896 add_zone_dind2 (i + (unsigned int *) blk, &blk_chg);
897 if (blk_chg)
898 write_block (block, blk);
899}
900#endif
901
902void check_zones(unsigned int i)
903{
904 struct minix_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 = Inode + i;
911 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
912 !S_ISLNK(inode->i_mode))
913 return;
914 for (i=0 ; i<7 ; i++)
915 add_zone(i + inode->i_zone, &changed);
916 add_zone_ind(7 + inode->i_zone, &changed);
917 add_zone_dind(8 + inode->i_zone, &changed);
918}
919
920#ifdef HAVE_MINIX2
921void
922check_zones2 (unsigned int i)
923{
924 struct minix2_inode *inode;
925
926 if (!i || i > INODES)
927 return;
928 if (inode_count[i] > 1) /* have we counted this file already? */
929 return;
930 inode = Inode2 + i;
931 if (!S_ISDIR (inode->i_mode) && !S_ISREG (inode->i_mode)
932 && !S_ISLNK (inode->i_mode))
933 return;
934 for (i = 0; i < 7; i++)
935 add_zone2 (i + inode->i_zone, &changed);
936 add_zone_ind2 (7 + inode->i_zone, &changed);
937 add_zone_dind2 (8 + inode->i_zone, &changed);
938 add_zone_tind2 (9 + inode->i_zone, &changed);
939}
940#endif
941
942void check_file(struct minix_inode * dir, unsigned int offset)
943{
944 static char blk[BLOCK_SIZE];
945 struct minix_inode * inode;
946 int ino;
947 char * name;
948 int block;
949
950 block = map_block(dir,offset/BLOCK_SIZE);
951 read_block(block, blk);
952 name = blk + (offset % BLOCK_SIZE) + 2;
953 ino = * (unsigned short *) (name-2);
954 if (ino > INODES) {
955 print_current_name();
956 printf(_(" contains a bad inode number for file '"));
957 printf("%.*s'.",namelen,name);
958 if (ask(_(" Remove"),1)) {
959 *(unsigned short *)(name-2) = 0;
960 write_block(block, blk);
961 }
962 ino = 0;
963 }
964 if (name_depth < MAX_DEPTH)
965 strncpy (name_list[name_depth], name, namelen);
966 name_depth++;
967 inode = get_inode(ino);
968 name_depth--;
969 if (!offset) {
970 if (!inode || strcmp(".",name)) {
971 print_current_name();
972 printf(_(": bad directory: '.' isn't first\n"));
973 errors_uncorrected = 1;
974 } else return;
975 }
976 if (offset == dirsize) {
977 if (!inode || strcmp("..",name)) {
978 print_current_name();
979 printf(_(": bad directory: '..' isn't second\n"));
980 errors_uncorrected = 1;
981 } else return;
982 }
983 if (!inode)
984 return;
985 if (name_depth < MAX_DEPTH)
986 strncpy(name_list[name_depth],name,namelen);
987 name_depth++;
988 if (list) {
989 if (verbose)
990 printf("%6d %07o %3d ",ino,inode->i_mode,inode->i_nlinks);
991 print_current_name();
992 if (S_ISDIR(inode->i_mode))
993 printf(":\n");
994 else
995 printf("\n");
996 }
997 check_zones(ino);
998 if (inode && S_ISDIR(inode->i_mode))
999 recursive_check(ino);
1000 name_depth--;
1001 return;
1002}
1003
1004#ifdef HAVE_MINIX2
1005void
1006check_file2 (struct minix2_inode *dir, unsigned int offset)
1007{
1008 static char blk[BLOCK_SIZE];
1009 struct minix2_inode *inode;
1010 int ino;
1011 char *name;
1012 int block;
1013
1014 block = map_block2 (dir, offset / BLOCK_SIZE);
1015 read_block (block, blk);
1016 name = blk + (offset % BLOCK_SIZE) + 2;
1017 ino = *(unsigned short *) (name - 2);
1018 if (ino > INODES) {
1019 print_current_name ();
1020 printf (_(" contains a bad inode number for file '"));
1021 printf ("%.*s'.", namelen, name);
1022 if (ask (_(" Remove"), 1)) {
1023 *(unsigned short *) (name - 2) = 0;
1024 write_block (block, blk);
1025 }
1026 ino = 0;
1027 }
1028 if (name_depth < MAX_DEPTH)
1029 strncpy (name_list[name_depth], name, namelen);
1030 name_depth++;
1031 inode = get_inode2 (ino);
1032 name_depth--;
1033 if (!offset) {
1034 if (!inode || strcmp (".", name)) {
1035 print_current_name ();
1036 printf (_(": bad directory: '.' isn't first\n"));
1037 errors_uncorrected = 1;
1038 } else
1039 return;
1040 }
1041 if (offset == dirsize) {
1042 if (!inode || strcmp ("..", name)) {
1043 print_current_name ();
1044 printf (_(": bad directory: '..' isn't second\n"));
1045 errors_uncorrected = 1;
1046 } else
1047 return;
1048 }
1049 if (!inode)
1050 return;
1051 name_depth++;
1052 if (list) {
1053 if (verbose)
1054 printf ("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1055 print_current_name ();
1056 if (S_ISDIR (inode->i_mode))
1057 printf (":\n");
1058 else
1059 printf ("\n");
1060 }
1061 check_zones2 (ino);
1062 if (inode && S_ISDIR (inode->i_mode))
1063 recursive_check2 (ino);
1064 name_depth--;
1065 return;
1066}
1067#endif
1068
1069void recursive_check(unsigned int ino)
1070{
1071 struct minix_inode * dir;
1072 unsigned int offset;
1073
1074 dir = Inode + ino;
1075 if (!S_ISDIR(dir->i_mode))
1076 die(_("internal error"));
1077 if (dir->i_size < 2 * dirsize) {
1078 print_current_name();
1079 printf(_(": bad directory: size<32"));
1080 errors_uncorrected = 1;
1081 }
1082 for (offset = 0 ; offset < dir->i_size ; offset += dirsize)
1083 check_file(dir,offset);
1084}
1085
1086#ifdef HAVE_MINIX2
1087void
1088recursive_check2 (unsigned int ino)
1089{
1090 struct minix2_inode *dir;
1091 unsigned int offset;
1092
1093 dir = Inode2 + ino;
1094 if (!S_ISDIR (dir->i_mode))
1095 die ("internal error");
1096 if (dir->i_size < 2 * dirsize) {
1097 print_current_name ();
1098 printf (_(": bad directory: size < 32"));
1099 errors_uncorrected = 1;
1100 }
1101 for (offset = 0; offset < dir->i_size; offset += dirsize)
1102 check_file2 (dir, offset);
1103}
1104#endif
1105
1106int bad_zone(int i)
1107{
1108 char buffer[1024];
1109
1110 if (BLOCK_SIZE*i != lseek(IN, BLOCK_SIZE*i, SEEK_SET))
1111 die(_("seek failed in bad_zone"));
1112 return (BLOCK_SIZE != read(IN, buffer, BLOCK_SIZE));
1113}
1114
1115void check_counts(void)
1116{
1117 int i;
1118
1119 for (i=1 ; i <= INODES ; i++) {
1120 if (!inode_in_use(i) && Inode[i].i_mode && warn_mode) {
1121 printf(_("Inode %d mode not cleared."),i);
1122 if (ask(_("Clear"),1)) {
1123 Inode[i].i_mode = 0;
1124 changed = 1;
1125 }
1126 }
1127 if (!inode_count[i]) {
1128 if (!inode_in_use(i))
1129 continue;
1130 printf(_("Inode %d not used, marked used in the bitmap."),i);
1131 if (ask(_("Clear"),1))
1132 unmark_inode(i);
1133 continue;
1134 }
1135 if (!inode_in_use(i)) {
1136 printf(_("Inode %d used, marked unused in the bitmap."),
1137 i);
1138 if (ask("Set",1))
1139 mark_inode(i);
1140 }
1141 if (Inode[i].i_nlinks != inode_count[i]) {
1142 printf(_("Inode %d (mode = %07o), i_nlinks=%d, counted=%d."),
1143 i,Inode[i].i_mode,Inode[i].i_nlinks,inode_count[i]);
1144 if (ask(_("Set i_nlinks to count"),1)) {
1145 Inode[i].i_nlinks=inode_count[i];
1146 changed=1;
1147 }
1148 }
1149 }
1150 for (i=FIRSTZONE ; i < ZONES ; i++) {
1151 if (zone_in_use(i) == zone_count[i])
1152 continue;
1153 if (!zone_count[i]) {
1154 if (bad_zone(i))
1155 continue;
1156 printf(_("Zone %d: marked in use, no file uses it."),i);
1157 if (ask(_("Unmark"),1))
1158 unmark_zone(i);
1159 continue;
1160 }
1161 printf(_("Zone %d: %sin use, counted=%d\n"),
1162 i,zone_in_use(i)?"":_("not "),zone_count[i]);
1163 }
1164}
1165
1166#ifdef HAVE_MINIX2
1167void
1168check_counts2 (void)
1169{
1170 int i;
1171
1172 for (i = 1; i <= INODES; i++) {
1173 if (!inode_in_use (i) && Inode2[i].i_mode && warn_mode) {
1174 printf (_("Inode %d mode not cleared."), i);
1175 if (ask (_("Clear"), 1)) {
1176 Inode2[i].i_mode = 0;
1177 changed = 1;
1178 }
1179 }
1180 if (!inode_count[i]) {
1181 if (!inode_in_use (i))
1182 continue;
1183 printf (_("Inode %d not used, marked used in the bitmap."), i);
1184 if (ask (_("Clear"), 1))
1185 unmark_inode (i);
1186 continue;
1187 }
1188 if (!inode_in_use (i)) {
1189 printf (_("Inode %d used, marked unused in the bitmap."), i);
1190 if (ask (_("Set"), 1))
1191 mark_inode (i);
1192 }
1193 if (Inode2[i].i_nlinks != inode_count[i]) {
1194 printf (_("Inode %d (mode = %07o), i_nlinks=%d, counted=%d."),
1195 i, Inode2[i].i_mode, Inode2[i].i_nlinks, inode_count[i]);
1196 if (ask (_("Set i_nlinks to count"), 1)) {
1197 Inode2[i].i_nlinks = inode_count[i];
1198 changed = 1;
1199 }
1200 }
1201 }
1202 for (i = FIRSTZONE; i < ZONES; i++) {
1203 if (zone_in_use (i) == zone_count[i])
1204 continue;
1205 if (!zone_count[i]) {
1206 if (bad_zone (i))
1207 continue;
1208 printf (_("Zone %d: marked in use, no file uses it."), i);
1209 if (ask (_("Unmark"), 1))
1210 unmark_zone (i);
1211 continue;
1212 }
1213 printf (_("Zone %d: %sin use, counted=%d\n"),
1214 i, zone_in_use (i) ? "" : _("not "), zone_count[i]);
1215 }
1216}
1217#endif
1218
1219void check(void)
1220{
1221 memset(inode_count,0,(INODES + 1) * sizeof(*inode_count));
1222 memset(zone_count,0,ZONES*sizeof(*zone_count));
1223 check_zones(ROOT_INO);
1224 recursive_check(ROOT_INO);
1225 check_counts();
1226}
1227
1228#ifdef HAVE_MINIX2
1229void
1230check2 (void)
1231{
1232 memset (inode_count, 0, (INODES + 1) * sizeof (*inode_count));
1233 memset (zone_count, 0, ZONES * sizeof (*zone_count));
1234 check_zones2 (ROOT_INO);
1235 recursive_check2 (ROOT_INO);
1236 check_counts2 ();
1237}
1238#endif
1239
1240extern int
1241fsck_minix_main(int argc, char ** argv)
1242{
1243 struct termios tmp;
1244 int count;
1245 int retcode = 0;
1246
1247 setlocale(LC_ALL, "");
1248 bindtextdomain(PACKAGE, LOCALEDIR);
1249 textdomain(PACKAGE);
1250
1251
1252 if (argc && *argv)
1253 program_name = *argv;
1254 if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
1255 die(_("bad inode size"));
1256#ifdef HAVE_MINIX2
1257 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
1258 die(_("bad v2 inode size"));
1259#endif
1260 while (argc-- > 1) {
1261 argv++;
1262 if (argv[0][0] != '-') {
1263 if (device_name)
1264 usage();
1265 else
1266 device_name = argv[0];
1267 } else while (*++argv[0])
1268 switch (argv[0][0]) {
1269 case 'l': list=1; break;
1270 case 'a': automatic=1; repair=1; break;
1271 case 'r': automatic=0; repair=1; break;
1272 case 'v': verbose=1; break;
1273 case 's': show=1; break;
1274 case 'm': warn_mode=1; break;
1275 case 'f': force=1; break;
1276 default: usage();
1277 }
1278 }
1279 if (!device_name)
1280 usage();
1281 check_mount(); /* trying to check a mounted filesystem? */
1282 if (repair && !automatic) {
1283 if (!isatty(0) || !isatty(1))
1284 die(_("need terminal for interactive repairs"));
1285 }
1286 IN = open(device_name,repair?O_RDWR:O_RDONLY);
1287 if (IN < 0)
1288 die(_("unable to open '%s'"));
1289 for (count=0 ; count<3 ; count++)
1290 sync();
1291 read_superblock();
1292
1293 /*
1294 * Determine whether or not we should continue with the checking.
1295 * This is based on the status of the filesystem valid and error
1296 * flags and whether or not the -f switch was specified on the
1297 * command line.
1298 */
1299 printf("%s, %s / %s\n", program_name, program_version,
1300 util_linux_version);
1301 if ( !(Super.s_state & MINIX_ERROR_FS) &&
1302 (Super.s_state & MINIX_VALID_FS) &&
1303 !force ) {
1304 if (repair)
1305 printf(_("%s is clean, no check.\n"), device_name);
1306 return retcode;
1307 }
1308 else if (force)
1309 printf(_("Forcing filesystem check on %s.\n"), device_name);
1310 else if (repair)
1311 printf(_("Filesystem on %s is dirty, needs checking.\n"),\
1312 device_name);
1313
1314 read_tables();
1315
1316 if (repair && !automatic) {
1317 tcgetattr(0,&termios);
1318 tmp = termios;
1319 tmp.c_lflag &= ~(ICANON|ECHO);
1320 tcsetattr(0,TCSANOW,&tmp);
1321 termios_set = 1;
1322 }
1323
1324#if HAVE_MINIX2
1325 if (version2) {
1326 check_root2 ();
1327 check2 ();
1328 } else
1329#endif
1330 {
1331 check_root();
1332 check();
1333 }
1334 if (verbose) {
1335 int i, free;
1336
1337 for (i=1,free=0 ; i <= INODES ; i++)
1338 if (!inode_in_use(i))
1339 free++;
1340 printf(_("\n%6ld inodes used (%ld%%)\n"),(INODES-free),
1341 100*(INODES-free)/INODES);
1342 for (i=FIRSTZONE,free=0 ; i < ZONES ; i++)
1343 if (!zone_in_use(i))
1344 free++;
1345 printf(_("%6ld zones used (%ld%%)\n"),(ZONES-free),
1346 100*(ZONES-free)/ZONES);
1347 printf(_("\n%6d regular files\n"
1348 "%6d directories\n"
1349 "%6d character device files\n"
1350 "%6d block device files\n"
1351 "%6d links\n"
1352 "%6d symbolic links\n"
1353 "------\n"
1354 "%6d files\n"),
1355 regular,directory,chardev,blockdev,
1356 links-2*directory+1,symlinks,total-2*directory+1);
1357 }
1358 if (changed) {
1359 write_tables();
1360 printf(_( "----------------------------\n"
1361 "FILE SYSTEM HAS BEEN CHANGED\n"
1362 "----------------------------\n"));
1363 for (count=0 ; count<3 ; count++)
1364 sync();
1365 }
1366 else if ( repair )
1367 write_super_block();
1368
1369 if (repair && !automatic)
1370 tcsetattr(0,TCSANOW,&termios);
1371
1372 if (changed)
1373 retcode += 3;
1374 if (errors_uncorrected)
1375 retcode += 4;
1376 return retcode;
1377}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-13 12:50:06 +0000