source: MondoRescue/trunk/mindi-busybox/util-linux/mkfs_minix.c@ 956

Last change on this file since 956 was 821, checked in by Bruno Cornec, 18 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)
File size: 20.8 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * mkfs.c - make a linux (minix) file-system.
4 *
5 * (C) 1991 Linus Torvalds. This file may be redistributed as per
6 * the Linux copyright.
7 */
8
9/*
10 * DD.MM.YY
11 *
12 * 24.11.91 - Time began. Used the fsck sources to get started.
13 *
14 * 25.11.91 - Corrected some bugs. Added support for ".badblocks"
15 * The algorithm for ".badblocks" is a bit weird, but
16 * it should work. Oh, well.
17 *
18 * 25.01.92 - Added the -l option for getting the list of bad blocks
19 * out of a named file. (Dave Rivers, rivers@ponds.uucp)
20 *
21 * 28.02.92 - Added %-information when using -c.
22 *
23 * 28.02.93 - Added support for other namelengths than the original
24 * 14 characters so that I can test the new kernel routines..
25 *
26 * 09.10.93 - Make exit status conform to that required by fsutil
27 * (Rik Faith, faith@cs.unc.edu)
28 *
29 * 31.10.93 - Added inode request feature, for backup floppies: use
30 * 32 inodes, for a news partition use more.
31 * (Scott Heavner, sdh@po.cwru.edu)
32 *
33 * 03.01.94 - Added support for file system valid flag.
34 * (Dr. Wettstein, greg%wind.uucp@plains.nodak.edu)
35 *
36 * 30.10.94 - added support for v2 filesystem
37 * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
38 *
39 * 09.11.94 - Added test to prevent overwrite of mounted fs adapted
40 * from Theodore Ts'o's (tytso@athena.mit.edu) mke2fs
41 * program. (Daniel Quinlan, quinlan@yggdrasil.com)
42 *
43 * 03.20.95 - Clear first 512 bytes of filesystem to make certain that
44 * the filesystem is not misidentified as a MS-DOS FAT filesystem.
45 * (Daniel Quinlan, quinlan@yggdrasil.com)
46 *
47 * 02.07.96 - Added small patch from Russell King to make the program a
48 * good deal more portable (janl@math.uio.no)
49 *
50 * Usage: mkfs [-c | -l filename ] [-v] [-nXX] [-iXX] device [size-in-blocks]
51 *
52 * -c for readability checking (SLOW!)
53 * -l for getting a list of bad blocks from a file.
54 * -n for namelength (currently the kernel only uses 14 or 30)
55 * -i for number of inodes
56 * -v for v2 filesystem
57 *
58 * The device may be a block device or a image of one, but this isn't
59 * enforced (but it's not much fun on a character device :-).
60 *
61 * Modified for BusyBox by Erik Andersen <andersen@debian.org> --
62 * removed getopt based parser and added a hand rolled one.
63 */
64
65#include <stdio.h>
66#include <time.h>
67#include <unistd.h>
68#include <string.h>
69#include <signal.h>
70#include <fcntl.h>
71#include <ctype.h>
72#include <stdlib.h>
73#include <stdint.h>
74#include <termios.h>
75#include <sys/ioctl.h>
76#include <sys/param.h>
77#include <mntent.h>
78#include "busybox.h"
79
80#define MINIX_ROOT_INO 1
81#define MINIX_LINK_MAX 250
82#define MINIX2_LINK_MAX 65530
83
84#define MINIX_I_MAP_SLOTS 8
85#define MINIX_Z_MAP_SLOTS 64
86#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
87#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
88#define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
89#define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
90#define MINIX_VALID_FS 0x0001 /* Clean fs. */
91#define MINIX_ERROR_FS 0x0002 /* fs has errors. */
92
93#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
94#define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode)))
95
96#define MINIX_V1 0x0001 /* original minix fs */
97#define MINIX_V2 0x0002 /* minix V2 fs */
98
99#define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version
100
101/*
102 * This is the original minix inode layout on disk.
103 * Note the 8-bit gid and atime and ctime.
104 */
105struct minix_inode {
106 uint16_t i_mode;
107 uint16_t i_uid;
108 uint32_t i_size;
109 uint32_t i_time;
110 uint8_t i_gid;
111 uint8_t i_nlinks;
112 uint16_t i_zone[9];
113};
114
115/*
116 * The new minix inode has all the time entries, as well as
117 * long block numbers and a third indirect block (7+1+1+1
118 * instead of 7+1+1). Also, some previously 8-bit values are
119 * now 16-bit. The inode is now 64 bytes instead of 32.
120 */
121struct minix2_inode {
122 uint16_t i_mode;
123 uint16_t i_nlinks;
124 uint16_t i_uid;
125 uint16_t i_gid;
126 uint32_t i_size;
127 uint32_t i_atime;
128 uint32_t i_mtime;
129 uint32_t i_ctime;
130 uint32_t i_zone[10];
131};
132
133/*
134 * minix super-block data on disk
135 */
136struct minix_super_block {
137 uint16_t s_ninodes;
138 uint16_t s_nzones;
139 uint16_t s_imap_blocks;
140 uint16_t s_zmap_blocks;
141 uint16_t s_firstdatazone;
142 uint16_t s_log_zone_size;
143 uint32_t s_max_size;
144 uint16_t s_magic;
145 uint16_t s_state;
146 uint32_t s_zones;
147};
148
149struct minix_dir_entry {
150 uint16_t inode;
151 char name[0];
152};
153
154#define NAME_MAX 255 /* # chars in a file name */
155
156#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
157
158#define MINIX_VALID_FS 0x0001 /* Clean fs. */
159#define MINIX_ERROR_FS 0x0002 /* fs has errors. */
160
161#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
162#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
163
164#ifndef BLKGETSIZE
165#define BLKGETSIZE _IO(0x12,96) /* return device size */
166#endif
167
168
169#ifndef __linux__
170#define volatile
171#endif
172
173#define MINIX_ROOT_INO 1
174#define MINIX_BAD_INO 2
175
176#define TEST_BUFFER_BLOCKS 16
177#define MAX_GOOD_BLOCKS 512
178
179#define UPPER(size,n) (((size)+((n)-1))/(n))
180#define INODE_SIZE (sizeof(struct minix_inode))
181#ifdef CONFIG_FEATURE_MINIX2
182#define INODE_SIZE2 (sizeof(struct minix2_inode))
183#define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
184 : MINIX_INODES_PER_BLOCK))
185#else
186#define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
187#endif
188#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
189
190#define BITS_PER_BLOCK (BLOCK_SIZE<<3)
191
192static char *device_name;
193static int DEV = -1;
194static uint32_t BLOCKS;
195static int check;
196static int badblocks;
197static int namelen = 30; /* default (changed to 30, per Linus's
198
199 suggestion, Sun Nov 21 08:05:07 1993) */
200static int dirsize = 32;
201static int magic = MINIX_SUPER_MAGIC2;
202static int version2;
203
204static char root_block[BLOCK_SIZE];
205
206static char *inode_buffer;
207
208#define Inode (((struct minix_inode *) inode_buffer)-1)
209#ifdef CONFIG_FEATURE_MINIX2
210#define Inode2 (((struct minix2_inode *) inode_buffer)-1)
211#endif
212static char super_block_buffer[BLOCK_SIZE];
213static char boot_block_buffer[512];
214
215#define Super (*(struct minix_super_block *)super_block_buffer)
216#define INODES (Super.s_ninodes)
217#ifdef CONFIG_FEATURE_MINIX2
218#define ZONES (version2 ? Super.s_zones : Super.s_nzones)
219#else
220#define ZONES (Super.s_nzones)
221#endif
222#define IMAPS (Super.s_imap_blocks)
223#define ZMAPS (Super.s_zmap_blocks)
224#define FIRSTZONE (Super.s_firstdatazone)
225#define ZONESIZE (Super.s_log_zone_size)
226#define MAXSIZE (Super.s_max_size)
227#define MAGIC (Super.s_magic)
228#define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
229
230static char *inode_map;
231static char *zone_map;
232
233static unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
234static int used_good_blocks;
235static unsigned long req_nr_inodes;
236
237static inline int bit(char * a,unsigned int i)
238{
239 return (a[i >> 3] & (1<<(i & 7))) != 0;
240}
241#define inode_in_use(x) (bit(inode_map,(x)))
242#define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
243
244#define mark_inode(x) (setbit(inode_map,(x)))
245#define unmark_inode(x) (clrbit(inode_map,(x)))
246
247#define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1))
248#define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1))
249
250/*
251 * Check to make certain that our new filesystem won't be created on
252 * an already mounted partition. Code adapted from mke2fs, Copyright
253 * (C) 1994 Theodore Ts'o. Also licensed under GPL.
254 */
255static inline void check_mount(void)
256{
257 FILE *f;
258 struct mntent *mnt;
259
260 if ((f = setmntent(MOUNTED, "r")) == NULL)
261 return;
262 while ((mnt = getmntent(f)) != NULL)
263 if (strcmp(device_name, mnt->mnt_fsname) == 0)
264 break;
265 endmntent(f);
266 if (!mnt)
267 return;
268
269 bb_error_msg_and_die("%s is mounted; will not make a filesystem here!", device_name);
270}
271
272static long valid_offset(int fd, int offset)
273{
274 char ch;
275
276 if (lseek(fd, offset, 0) < 0)
277 return 0;
278 if (read(fd, &ch, 1) < 1)
279 return 0;
280 return 1;
281}
282
283static inline int count_blocks(int fd)
284{
285 int high, low;
286
287 low = 0;
288 for (high = 1; valid_offset(fd, high); high *= 2)
289 low = high;
290 while (low < high - 1) {
291 const int mid = (low + high) / 2;
292
293 if (valid_offset(fd, mid))
294 low = mid;
295 else
296 high = mid;
297 }
298 valid_offset(fd, 0);
299 return (low + 1);
300}
301
302static inline int get_size(const char *file)
303{
304 int fd;
305 long size;
306
307 fd = bb_xopen3(file, O_RDWR, 0);
308 if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
309 close(fd);
310 return (size * 512);
311 }
312
313 size = count_blocks(fd);
314 close(fd);
315 return size;
316}
317
318static inline void write_tables(void)
319{
320 /* Mark the super block valid. */
321 Super.s_state |= MINIX_VALID_FS;
322 Super.s_state &= ~MINIX_ERROR_FS;
323
324 if (lseek(DEV, 0, SEEK_SET))
325 bb_error_msg_and_die("seek to boot block failed in write_tables");
326 if (512 != write(DEV, boot_block_buffer, 512))
327 bb_error_msg_and_die("unable to clear boot sector");
328 if (BLOCK_SIZE != lseek(DEV, BLOCK_SIZE, SEEK_SET))
329 bb_error_msg_and_die("seek failed in write_tables");
330 if (BLOCK_SIZE != write(DEV, super_block_buffer, BLOCK_SIZE))
331 bb_error_msg_and_die("unable to write super-block");
332 if (IMAPS * BLOCK_SIZE != write(DEV, inode_map, IMAPS * BLOCK_SIZE))
333 bb_error_msg_and_die("unable to write inode map");
334 if (ZMAPS * BLOCK_SIZE != write(DEV, zone_map, ZMAPS * BLOCK_SIZE))
335 bb_error_msg_and_die("unable to write zone map");
336 if (INODE_BUFFER_SIZE != write(DEV, inode_buffer, INODE_BUFFER_SIZE))
337 bb_error_msg_and_die("unable to write inodes");
338
339}
340
341static void write_block(int blk, char *buffer)
342{
343 if (blk * BLOCK_SIZE != lseek(DEV, blk * BLOCK_SIZE, SEEK_SET))
344 bb_error_msg_and_die("seek failed in write_block");
345 if (BLOCK_SIZE != write(DEV, buffer, BLOCK_SIZE))
346 bb_error_msg_and_die("write failed in write_block");
347}
348
349static int get_free_block(void)
350{
351 int blk;
352
353 if (used_good_blocks + 1 >= MAX_GOOD_BLOCKS)
354 bb_error_msg_and_die("too many bad blocks");
355 if (used_good_blocks)
356 blk = good_blocks_table[used_good_blocks - 1] + 1;
357 else
358 blk = FIRSTZONE;
359 while (blk < ZONES && zone_in_use(blk))
360 blk++;
361 if (blk >= ZONES)
362 bb_error_msg_and_die("not enough good blocks");
363 good_blocks_table[used_good_blocks] = blk;
364 used_good_blocks++;
365 return blk;
366}
367
368static inline void mark_good_blocks(void)
369{
370 int blk;
371
372 for (blk = 0; blk < used_good_blocks; blk++)
373 mark_zone(good_blocks_table[blk]);
374}
375
376static int next(int zone)
377{
378 if (!zone)
379 zone = FIRSTZONE - 1;
380 while (++zone < ZONES)
381 if (zone_in_use(zone))
382 return zone;
383 return 0;
384}
385
386static inline void make_bad_inode(void)
387{
388 struct minix_inode *inode = &Inode[MINIX_BAD_INO];
389 int i, j, zone;
390 int ind = 0, dind = 0;
391 unsigned short ind_block[BLOCK_SIZE >> 1];
392 unsigned short dind_block[BLOCK_SIZE >> 1];
393
394#define NEXT_BAD (zone = next(zone))
395
396 if (!badblocks)
397 return;
398 mark_inode(MINIX_BAD_INO);
399 inode->i_nlinks = 1;
400 inode->i_time = time(NULL);
401 inode->i_mode = S_IFREG + 0000;
402 inode->i_size = badblocks * BLOCK_SIZE;
403 zone = next(0);
404 for (i = 0; i < 7; i++) {
405 inode->i_zone[i] = zone;
406 if (!NEXT_BAD)
407 goto end_bad;
408 }
409 inode->i_zone[7] = ind = get_free_block();
410 memset(ind_block, 0, BLOCK_SIZE);
411 for (i = 0; i < 512; i++) {
412 ind_block[i] = zone;
413 if (!NEXT_BAD)
414 goto end_bad;
415 }
416 inode->i_zone[8] = dind = get_free_block();
417 memset(dind_block, 0, BLOCK_SIZE);
418 for (i = 0; i < 512; i++) {
419 write_block(ind, (char *) ind_block);
420 dind_block[i] = ind = get_free_block();
421 memset(ind_block, 0, BLOCK_SIZE);
422 for (j = 0; j < 512; j++) {
423 ind_block[j] = zone;
424 if (!NEXT_BAD)
425 goto end_bad;
426 }
427 }
428 bb_error_msg_and_die("too many bad blocks");
429 end_bad:
430 if (ind)
431 write_block(ind, (char *) ind_block);
432 if (dind)
433 write_block(dind, (char *) dind_block);
434}
435
436#ifdef CONFIG_FEATURE_MINIX2
437static inline void make_bad_inode2(void)
438{
439 struct minix2_inode *inode = &Inode2[MINIX_BAD_INO];
440 int i, j, zone;
441 int ind = 0, dind = 0;
442 unsigned long ind_block[BLOCK_SIZE >> 2];
443 unsigned long dind_block[BLOCK_SIZE >> 2];
444
445 if (!badblocks)
446 return;
447 mark_inode(MINIX_BAD_INO);
448 inode->i_nlinks = 1;
449 inode->i_atime = inode->i_mtime = inode->i_ctime = time(NULL);
450 inode->i_mode = S_IFREG + 0000;
451 inode->i_size = badblocks * BLOCK_SIZE;
452 zone = next(0);
453 for (i = 0; i < 7; i++) {
454 inode->i_zone[i] = zone;
455 if (!NEXT_BAD)
456 goto end_bad;
457 }
458 inode->i_zone[7] = ind = get_free_block();
459 memset(ind_block, 0, BLOCK_SIZE);
460 for (i = 0; i < 256; i++) {
461 ind_block[i] = zone;
462 if (!NEXT_BAD)
463 goto end_bad;
464 }
465 inode->i_zone[8] = dind = get_free_block();
466 memset(dind_block, 0, BLOCK_SIZE);
467 for (i = 0; i < 256; i++) {
468 write_block(ind, (char *) ind_block);
469 dind_block[i] = ind = get_free_block();
470 memset(ind_block, 0, BLOCK_SIZE);
471 for (j = 0; j < 256; j++) {
472 ind_block[j] = zone;
473 if (!NEXT_BAD)
474 goto end_bad;
475 }
476 }
477 /* Could make triple indirect block here */
478 bb_error_msg_and_die("too many bad blocks");
479 end_bad:
480 if (ind)
481 write_block(ind, (char *) ind_block);
482 if (dind)
483 write_block(dind, (char *) dind_block);
484}
485#endif
486
487static inline void make_root_inode(void)
488{
489 struct minix_inode *inode = &Inode[MINIX_ROOT_INO];
490
491 mark_inode(MINIX_ROOT_INO);
492 inode->i_zone[0] = get_free_block();
493 inode->i_nlinks = 2;
494 inode->i_time = time(NULL);
495 if (badblocks)
496 inode->i_size = 3 * dirsize;
497 else {
498 root_block[2 * dirsize] = '\0';
499 root_block[2 * dirsize + 1] = '\0';
500 inode->i_size = 2 * dirsize;
501 }
502 inode->i_mode = S_IFDIR + 0755;
503 inode->i_uid = getuid();
504 if (inode->i_uid)
505 inode->i_gid = getgid();
506 write_block(inode->i_zone[0], root_block);
507}
508
509#ifdef CONFIG_FEATURE_MINIX2
510static inline void make_root_inode2(void)
511{
512 struct minix2_inode *inode = &Inode2[MINIX_ROOT_INO];
513
514 mark_inode(MINIX_ROOT_INO);
515 inode->i_zone[0] = get_free_block();
516 inode->i_nlinks = 2;
517 inode->i_atime = inode->i_mtime = inode->i_ctime = time(NULL);
518 if (badblocks)
519 inode->i_size = 3 * dirsize;
520 else {
521 root_block[2 * dirsize] = '\0';
522 root_block[2 * dirsize + 1] = '\0';
523 inode->i_size = 2 * dirsize;
524 }
525 inode->i_mode = S_IFDIR + 0755;
526 inode->i_uid = getuid();
527 if (inode->i_uid)
528 inode->i_gid = getgid();
529 write_block(inode->i_zone[0], root_block);
530}
531#endif
532
533static inline void setup_tables(void)
534{
535 int i;
536 unsigned long inodes;
537
538 memset(super_block_buffer, 0, BLOCK_SIZE);
539 memset(boot_block_buffer, 0, 512);
540 MAGIC = magic;
541 ZONESIZE = 0;
542 MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
543#ifdef CONFIG_FEATURE_MINIX2
544 if (version2) {
545 Super.s_zones = BLOCKS;
546 } else
547#endif
548 Super.s_nzones = BLOCKS;
549
550/* some magic nrs: 1 inode / 3 blocks */
551 if (req_nr_inodes == 0)
552 inodes = BLOCKS / 3;
553 else
554 inodes = req_nr_inodes;
555 /* Round up inode count to fill block size */
556#ifdef CONFIG_FEATURE_MINIX2
557 if (version2)
558 inodes = ((inodes + MINIX2_INODES_PER_BLOCK - 1) &
559 ~(MINIX2_INODES_PER_BLOCK - 1));
560 else
561#endif
562 inodes = ((inodes + MINIX_INODES_PER_BLOCK - 1) &
563 ~(MINIX_INODES_PER_BLOCK - 1));
564 if (inodes > 65535)
565 inodes = 65535;
566 INODES = inodes;
567 IMAPS = UPPER(INODES + 1, BITS_PER_BLOCK);
568 ZMAPS = 0;
569 i = 0;
570 while (ZMAPS !=
571 UPPER(BLOCKS - (2 + IMAPS + ZMAPS + INODE_BLOCKS) + 1,
572 BITS_PER_BLOCK) && i < 1000) {
573 ZMAPS =
574 UPPER(BLOCKS - (2 + IMAPS + ZMAPS + INODE_BLOCKS) + 1,
575 BITS_PER_BLOCK);
576 i++;
577 }
578 /* Real bad hack but overwise mkfs.minix can be thrown
579 * in infinite loop...
580 * try:
581 * dd if=/dev/zero of=test.fs count=10 bs=1024
582 * /sbin/mkfs.minix -i 200 test.fs
583 * */
584 if (i >= 999) {
585 bb_error_msg_and_die("unable to allocate buffers for maps");
586 }
587 FIRSTZONE = NORM_FIRSTZONE;
588 inode_map = xmalloc(IMAPS * BLOCK_SIZE);
589 zone_map = xmalloc(ZMAPS * BLOCK_SIZE);
590 memset(inode_map, 0xff, IMAPS * BLOCK_SIZE);
591 memset(zone_map, 0xff, ZMAPS * BLOCK_SIZE);
592 for (i = FIRSTZONE; i < ZONES; i++)
593 unmark_zone(i);
594 for (i = MINIX_ROOT_INO; i <= INODES; i++)
595 unmark_inode(i);
596 inode_buffer = xmalloc(INODE_BUFFER_SIZE);
597 memset(inode_buffer, 0, INODE_BUFFER_SIZE);
598 printf("%ld inodes\n", (long)INODES);
599 printf("%ld blocks\n", (long)ZONES);
600 printf("Firstdatazone=%ld (%ld)\n", (long)FIRSTZONE, (long)NORM_FIRSTZONE);
601 printf("Zonesize=%d\n", BLOCK_SIZE << ZONESIZE);
602 printf("Maxsize=%ld\n\n", (long)MAXSIZE);
603}
604
605/*
606 * Perform a test of a block; return the number of
607 * blocks readable/writable.
608 */
609static inline long do_check(char *buffer, int try, unsigned int current_block)
610{
611 long got;
612
613 /* Seek to the correct loc. */
614 if (lseek(DEV, current_block * BLOCK_SIZE, SEEK_SET) !=
615 current_block * BLOCK_SIZE) {
616 bb_error_msg_and_die("seek failed during testing of blocks");
617 }
618
619
620 /* Try the read */
621 got = read(DEV, buffer, try * BLOCK_SIZE);
622 if (got < 0)
623 got = 0;
624 if (got & (BLOCK_SIZE - 1)) {
625 printf("Weird values in do_check: probably bugs\n");
626 }
627 got /= BLOCK_SIZE;
628 return got;
629}
630
631static unsigned int currently_testing;
632
633static void alarm_intr(int alnum)
634{
635 if (currently_testing >= ZONES)
636 return;
637 signal(SIGALRM, alarm_intr);
638 alarm(5);
639 if (!currently_testing)
640 return;
641 printf("%d ...", currently_testing);
642 fflush(stdout);
643}
644
645static void check_blocks(void)
646{
647 int try, got;
648 static char buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS];
649
650 currently_testing = 0;
651 signal(SIGALRM, alarm_intr);
652 alarm(5);
653 while (currently_testing < ZONES) {
654 if (lseek(DEV, currently_testing * BLOCK_SIZE, SEEK_SET) !=
655 currently_testing * BLOCK_SIZE)
656 bb_error_msg_and_die("seek failed in check_blocks");
657 try = TEST_BUFFER_BLOCKS;
658 if (currently_testing + try > ZONES)
659 try = ZONES - currently_testing;
660 got = do_check(buffer, try, currently_testing);
661 currently_testing += got;
662 if (got == try)
663 continue;
664 if (currently_testing < FIRSTZONE)
665 bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
666 mark_zone(currently_testing);
667 badblocks++;
668 currently_testing++;
669 }
670 if (badblocks > 1)
671 printf("%d bad blocks\n", badblocks);
672 else if (badblocks == 1)
673 printf("one bad block\n");
674}
675
676static void get_list_blocks(char *filename)
677{
678 FILE *listfile;
679 unsigned long blockno;
680
681 listfile = bb_xfopen(filename, "r");
682 while (!feof(listfile)) {
683 fscanf(listfile, "%ld\n", &blockno);
684 mark_zone(blockno);
685 badblocks++;
686 }
687 if (badblocks > 1)
688 printf("%d bad blocks\n", badblocks);
689 else if (badblocks == 1)
690 printf("one bad block\n");
691}
692
693int mkfs_minix_main(int argc, char **argv)
694{
695 int i=1;
696 char *tmp;
697 struct stat statbuf;
698 char *listfile = NULL;
699 int stopIt=FALSE;
700
701 if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
702 bb_error_msg_and_die("bad inode size");
703#ifdef CONFIG_FEATURE_MINIX2
704 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
705 bb_error_msg_and_die("bad inode size");
706#endif
707
708 /* Parse options */
709 argv++;
710 while (--argc >= 0 && *argv && **argv) {
711 if (**argv == '-') {
712 stopIt=FALSE;
713 while (i > 0 && *++(*argv) && stopIt==FALSE) {
714 switch (**argv) {
715 case 'c':
716 check = 1;
717 break;
718 case 'i':
719 {
720 char *cp=NULL;
721 if (*(*argv+1) != 0) {
722 cp = ++(*argv);
723 } else {
724 if (--argc == 0) {
725 goto goodbye;
726 }
727 cp = *(++argv);
728 }
729 req_nr_inodes = strtoul(cp, &tmp, 0);
730 if (*tmp)
731 bb_show_usage();
732 stopIt=TRUE;
733 break;
734 }
735 case 'l':
736 if (--argc == 0) {
737 goto goodbye;
738 }
739 listfile = *(++argv);
740 break;
741 case 'n':
742 {
743 char *cp=NULL;
744
745 if (*(*argv+1) != 0) {
746 cp = ++(*argv);
747 } else {
748 if (--argc == 0) {
749 goto goodbye;
750 }
751 cp = *(++argv);
752 }
753 i = strtoul(cp, &tmp, 0);
754 if (*tmp)
755 bb_show_usage();
756 if (i == 14)
757 magic = MINIX_SUPER_MAGIC;
758 else if (i == 30)
759 magic = MINIX_SUPER_MAGIC2;
760 else
761 bb_show_usage();
762 namelen = i;
763 dirsize = i + 2;
764 stopIt=TRUE;
765 break;
766 }
767 case 'v':
768#ifdef CONFIG_FEATURE_MINIX2
769 version2 = 1;
770#else
771 bb_error_msg("%s: not compiled with minix v2 support",
772 device_name);
773 exit(-1);
774#endif
775 break;
776 case '-':
777 case 'h':
778 default:
779goodbye:
780 bb_show_usage();
781 }
782 }
783 } else {
784 if (device_name == NULL)
785 device_name = *argv;
786 else if (BLOCKS == 0)
787 BLOCKS = strtol(*argv, &tmp, 0);
788 else {
789 goto goodbye;
790 }
791 }
792 argv++;
793 }
794
795 if (device_name && !BLOCKS)
796 BLOCKS = get_size(device_name) / 1024;
797 if (!device_name || BLOCKS < 10) {
798 bb_show_usage();
799 }
800#ifdef CONFIG_FEATURE_MINIX2
801 if (version2) {
802 if (namelen == 14)
803 magic = MINIX2_SUPER_MAGIC;
804 else
805 magic = MINIX2_SUPER_MAGIC2;
806 } else
807#endif
808 if (BLOCKS > 65535)
809 BLOCKS = 65535;
810 check_mount(); /* is it already mounted? */
811 tmp = root_block;
812 *(short *) tmp = 1;
813 strcpy(tmp + 2, ".");
814 tmp += dirsize;
815 *(short *) tmp = 1;
816 strcpy(tmp + 2, "..");
817 tmp += dirsize;
818 *(short *) tmp = 2;
819 strcpy(tmp + 2, ".badblocks");
820 DEV = bb_xopen3(device_name, O_RDWR, 0);
821 if (fstat(DEV, &statbuf) < 0)
822 bb_error_msg_and_die("unable to stat %s", device_name);
823 if (!S_ISBLK(statbuf.st_mode))
824 check = 0;
825 else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
826 bb_error_msg_and_die("will not try to make filesystem on '%s'", device_name);
827 setup_tables();
828 if (check)
829 check_blocks();
830 else if (listfile)
831 get_list_blocks(listfile);
832#ifdef CONFIG_FEATURE_MINIX2
833 if (version2) {
834 make_root_inode2();
835 make_bad_inode2();
836 } else
837#endif
838 {
839 make_root_inode();
840 make_bad_inode();
841 }
842 mark_good_blocks();
843 write_tables();
844 return 0;
845
846}
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