source: MondoRescue/branches/3.3/mindi-busybox/util-linux/mkfs_minix.c@ 3621

Last change on this file since 3621 was 3621, checked in by Bruno Cornec, 7 years ago

New 3?3 banch for incorporation of latest busybox 1.25. Changing minor version to handle potential incompatibilities.
File size: 18.3 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.
6 *
7 * Licensed under GPLv2, see file LICENSE in this source tree.
8 */
9
10/*
11 * DD.MM.YY
12 *
13 * 24.11.91 - Time began. Used the fsck sources to get started.
14 *
15 * 25.11.91 - Corrected some bugs. Added support for ".badblocks"
16 * The algorithm for ".badblocks" is a bit weird, but
17 * it should work. Oh, well.
18 *
19 * 25.01.92 - Added the -l option for getting the list of bad blocks
20 * out of a named file. (Dave Rivers, rivers@ponds.uucp)
21 *
22 * 28.02.92 - Added %-information when using -c.
23 *
24 * 28.02.93 - Added support for other namelengths than the original
25 * 14 characters so that I can test the new kernel routines..
26 *
27 * 09.10.93 - Make exit status conform to that required by fsutil
28 * (Rik Faith, faith@cs.unc.edu)
29 *
30 * 31.10.93 - Added inode request feature, for backup floppies: use
31 * 32 inodes, for a news partition use more.
32 * (Scott Heavner, sdh@po.cwru.edu)
33 *
34 * 03.01.94 - Added support for file system valid flag.
35 * (Dr. Wettstein, greg%wind.uucp@plains.nodak.edu)
36 *
37 * 30.10.94 - added support for v2 filesystem
38 * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
39 *
40 * 09.11.94 - Added test to prevent overwrite of mounted fs adapted
41 * from Theodore Ts'o's (tytso@athena.mit.edu) mke2fs
42 * program. (Daniel Quinlan, quinlan@yggdrasil.com)
43 *
44 * 03.20.95 - Clear first 512 bytes of filesystem to make certain that
45 * the filesystem is not misidentified as a MS-DOS FAT filesystem.
46 * (Daniel Quinlan, quinlan@yggdrasil.com)
47 *
48 * 02.07.96 - Added small patch from Russell King to make the program a
49 * good deal more portable (janl@math.uio.no)
50 *
51 * Usage: mkfs [-c | -l filename ] [-v] [-nXX] [-iXX] device [size-in-blocks]
52 *
53 * -c for readability checking (SLOW!)
54 * -l for getting a list of bad blocks from a file.
55 * -n for namelength (currently the kernel only uses 14 or 30)
56 * -i for number of inodes
57 * -v for v2 filesystem
58 *
59 * The device may be a block device or a image of one, but this isn't
60 * enforced (but it's not much fun on a character device :-).
61 *
62 * Modified for BusyBox by Erik Andersen <andersen@debian.org> --
63 * removed getopt based parser and added a hand rolled one.
64 */
65
66//usage:#define mkfs_minix_trivial_usage
67//usage: "[-c | -l FILE] [-nXX] [-iXX] BLOCKDEV [KBYTES]"
68//usage:#define mkfs_minix_full_usage "\n\n"
69//usage: "Make a MINIX filesystem\n"
70//usage: "\n -c Check device for bad blocks"
71//usage: "\n -n [14|30] Maximum length of filenames"
72//usage: "\n -i INODES Number of inodes for the filesystem"
73//usage: "\n -l FILE Read bad blocks list from FILE"
74//usage: "\n -v Make version 2 filesystem"
75
76#include "libbb.h"
77#include <mntent.h>
78
79#include "minix.h"
80
81/* Store the very same times/uids/gids for image consistency */
82#if 1
83# define CUR_TIME 0
84# define GETUID 0
85# define GETGID 0
86#else
87/* Was using this. Is it useful? NB: this will break testsuite */
88# define CUR_TIME time(NULL)
89# define GETUID getuid()
90# define GETGID getgid()
91#endif
92
93enum {
94 MAX_GOOD_BLOCKS = 512,
95 TEST_BUFFER_BLOCKS = 16,
96};
97
98#if !ENABLE_FEATURE_MINIX2
99enum { version2 = 0 };
100#endif
101
102enum { dev_fd = 3 };
103
104struct globals {
105#if ENABLE_FEATURE_MINIX2
106 smallint version2;
107#define version2 G.version2
108#endif
109 char *device_name;
110 uint32_t total_blocks;
111 int badblocks;
112 int namelen;
113 int dirsize;
114 int magic;
115 char *inode_buffer;
116 char *inode_map;
117 char *zone_map;
118 int used_good_blocks;
119 unsigned long req_nr_inodes;
120 unsigned currently_testing;
121
122 char root_block[BLOCK_SIZE];
123 char superblock_buffer[BLOCK_SIZE];
124 char boot_block_buffer[512];
125 unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
126 /* check_blocks(): buffer[] was the biggest static in entire bbox */
127 char check_blocks_buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS];
128
129 unsigned short ind_block1[BLOCK_SIZE >> 1];
130 unsigned short dind_block1[BLOCK_SIZE >> 1];
131 unsigned long ind_block2[BLOCK_SIZE >> 2];
132 unsigned long dind_block2[BLOCK_SIZE >> 2];
133};
134#define G (*ptr_to_globals)
135#define INIT_G() do { \
136 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
137} while (0)
138
139static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
140{
141 return (size + n-1) / n;
142}
143
144#define INODE_BUF1 (((struct minix1_inode*)G.inode_buffer) - 1)
145#define INODE_BUF2 (((struct minix2_inode*)G.inode_buffer) - 1)
146
147#define SB (*(struct minix_superblock*)G.superblock_buffer)
148
149#define SB_INODES (SB.s_ninodes)
150#define SB_IMAPS (SB.s_imap_blocks)
151#define SB_ZMAPS (SB.s_zmap_blocks)
152#define SB_FIRSTZONE (SB.s_firstdatazone)
153#define SB_ZONE_SIZE (SB.s_log_zone_size)
154#define SB_MAXSIZE (SB.s_max_size)
155#define SB_MAGIC (SB.s_magic)
156
157#if !ENABLE_FEATURE_MINIX2
158# define SB_ZONES (SB.s_nzones)
159# define INODE_BLOCKS div_roundup(SB_INODES, MINIX1_INODES_PER_BLOCK)
160#else
161# define SB_ZONES (version2 ? SB.s_zones : SB.s_nzones)
162# define INODE_BLOCKS div_roundup(SB_INODES, \
163 (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
164#endif
165
166#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
167#define NORM_FIRSTZONE (2 + SB_IMAPS + SB_ZMAPS + INODE_BLOCKS)
168
169/* Before you ask "where they come from?": */
170/* setbit/clrbit are supplied by sys/param.h */
171
172static int minix_bit(const char* a, unsigned i)
173{
174 return a[i >> 3] & (1<<(i & 7));
175}
176
177static void minix_setbit(char *a, unsigned i)
178{
179 setbit(a, i);
180}
181static void minix_clrbit(char *a, unsigned i)
182{
183 clrbit(a, i);
184}
185
186/* Note: do not assume 0/1, it is 0/nonzero */
187#define zone_in_use(x) minix_bit(G.zone_map,(x)-SB_FIRSTZONE+1)
188/*#define inode_in_use(x) minix_bit(G.inode_map,(x))*/
189
190#define mark_inode(x) minix_setbit(G.inode_map,(x))
191#define unmark_inode(x) minix_clrbit(G.inode_map,(x))
192#define mark_zone(x) minix_setbit(G.zone_map,(x)-SB_FIRSTZONE+1)
193#define unmark_zone(x) minix_clrbit(G.zone_map,(x)-SB_FIRSTZONE+1)
194
195#ifndef BLKGETSIZE
196# define BLKGETSIZE _IO(0x12,96) /* return device size */
197#endif
198
199static void write_tables(void)
200{
201 /* Mark the superblock valid. */
202 SB.s_state |= MINIX_VALID_FS;
203 SB.s_state &= ~MINIX_ERROR_FS;
204
205 msg_eol = "seek to 0 failed";
206 xlseek(dev_fd, 0, SEEK_SET);
207
208 msg_eol = "can't clear boot sector";
209 xwrite(dev_fd, G.boot_block_buffer, 512);
210
211 msg_eol = "seek to BLOCK_SIZE failed";
212 xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
213
214 msg_eol = "can't write superblock";
215 xwrite(dev_fd, G.superblock_buffer, BLOCK_SIZE);
216
217 msg_eol = "can't write inode map";
218 xwrite(dev_fd, G.inode_map, SB_IMAPS * BLOCK_SIZE);
219
220 msg_eol = "can't write zone map";
221 xwrite(dev_fd, G.zone_map, SB_ZMAPS * BLOCK_SIZE);
222
223 msg_eol = "can't write inodes";
224 xwrite(dev_fd, G.inode_buffer, INODE_BUFFER_SIZE);
225
226 msg_eol = "\n";
227}
228
229static void write_block(int blk, char *buffer)
230{
231 xlseek(dev_fd, blk * BLOCK_SIZE, SEEK_SET);
232 xwrite(dev_fd, buffer, BLOCK_SIZE);
233}
234
235static int get_free_block(void)
236{
237 int blk;
238
239 if (G.used_good_blocks + 1 >= MAX_GOOD_BLOCKS)
240 bb_error_msg_and_die("too many bad blocks");
241 if (G.used_good_blocks)
242 blk = G.good_blocks_table[G.used_good_blocks - 1] + 1;
243 else
244 blk = SB_FIRSTZONE;
245 while (blk < SB_ZONES && zone_in_use(blk))
246 blk++;
247 if (blk >= SB_ZONES)
248 bb_error_msg_and_die("not enough good blocks");
249 G.good_blocks_table[G.used_good_blocks] = blk;
250 G.used_good_blocks++;
251 return blk;
252}
253
254static void mark_good_blocks(void)
255{
256 int blk;
257
258 for (blk = 0; blk < G.used_good_blocks; blk++)
259 mark_zone(G.good_blocks_table[blk]);
260}
261
262static int next(int zone)
263{
264 if (!zone)
265 zone = SB_FIRSTZONE - 1;
266 while (++zone < SB_ZONES)
267 if (zone_in_use(zone))
268 return zone;
269 return 0;
270}
271
272static void make_bad_inode(void)
273{
274 struct minix1_inode *inode = &INODE_BUF1[MINIX_BAD_INO];
275 int i, j, zone;
276 int ind = 0, dind = 0;
277 /* moved to globals to reduce stack usage
278 unsigned short ind_block[BLOCK_SIZE >> 1];
279 unsigned short dind_block[BLOCK_SIZE >> 1];
280 */
281#define ind_block (G.ind_block1)
282#define dind_block (G.dind_block1)
283
284#define NEXT_BAD (zone = next(zone))
285
286 if (!G.badblocks)
287 return;
288 mark_inode(MINIX_BAD_INO);
289 inode->i_nlinks = 1;
290 /* BTW, setting this makes all images different */
291 /* it's harder to check for bugs then - diff isn't helpful :(... */
292 inode->i_time = CUR_TIME;
293 inode->i_mode = S_IFREG + 0000;
294 inode->i_size = G.badblocks * BLOCK_SIZE;
295 zone = next(0);
296 for (i = 0; i < 7; i++) {
297 inode->i_zone[i] = zone;
298 if (!NEXT_BAD)
299 goto end_bad;
300 }
301 inode->i_zone[7] = ind = get_free_block();
302 memset(ind_block, 0, BLOCK_SIZE);
303 for (i = 0; i < 512; i++) {
304 ind_block[i] = zone;
305 if (!NEXT_BAD)
306 goto end_bad;
307 }
308 inode->i_zone[8] = dind = get_free_block();
309 memset(dind_block, 0, BLOCK_SIZE);
310 for (i = 0; i < 512; i++) {
311 write_block(ind, (char *) ind_block);
312 dind_block[i] = ind = get_free_block();
313 memset(ind_block, 0, BLOCK_SIZE);
314 for (j = 0; j < 512; j++) {
315 ind_block[j] = zone;
316 if (!NEXT_BAD)
317 goto end_bad;
318 }
319 }
320 bb_error_msg_and_die("too many bad blocks");
321 end_bad:
322 if (ind)
323 write_block(ind, (char *) ind_block);
324 if (dind)
325 write_block(dind, (char *) dind_block);
326#undef ind_block
327#undef dind_block
328}
329
330#if ENABLE_FEATURE_MINIX2
331static void make_bad_inode2(void)
332{
333 struct minix2_inode *inode = &INODE_BUF2[MINIX_BAD_INO];
334 int i, j, zone;
335 int ind = 0, dind = 0;
336 /* moved to globals to reduce stack usage
337 unsigned long ind_block[BLOCK_SIZE >> 2];
338 unsigned long dind_block[BLOCK_SIZE >> 2];
339 */
340#define ind_block (G.ind_block2)
341#define dind_block (G.dind_block2)
342
343 if (!G.badblocks)
344 return;
345 mark_inode(MINIX_BAD_INO);
346 inode->i_nlinks = 1;
347 inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
348 inode->i_mode = S_IFREG + 0000;
349 inode->i_size = G.badblocks * BLOCK_SIZE;
350 zone = next(0);
351 for (i = 0; i < 7; i++) {
352 inode->i_zone[i] = zone;
353 if (!NEXT_BAD)
354 goto end_bad;
355 }
356 inode->i_zone[7] = ind = get_free_block();
357 memset(ind_block, 0, BLOCK_SIZE);
358 for (i = 0; i < 256; i++) {
359 ind_block[i] = zone;
360 if (!NEXT_BAD)
361 goto end_bad;
362 }
363 inode->i_zone[8] = dind = get_free_block();
364 memset(dind_block, 0, BLOCK_SIZE);
365 for (i = 0; i < 256; i++) {
366 write_block(ind, (char *) ind_block);
367 dind_block[i] = ind = get_free_block();
368 memset(ind_block, 0, BLOCK_SIZE);
369 for (j = 0; j < 256; j++) {
370 ind_block[j] = zone;
371 if (!NEXT_BAD)
372 goto end_bad;
373 }
374 }
375 /* Could make triple indirect block here */
376 bb_error_msg_and_die("too many bad blocks");
377 end_bad:
378 if (ind)
379 write_block(ind, (char *) ind_block);
380 if (dind)
381 write_block(dind, (char *) dind_block);
382#undef ind_block
383#undef dind_block
384}
385#else
386void make_bad_inode2(void);
387#endif
388
389static void make_root_inode(void)
390{
391 struct minix1_inode *inode = &INODE_BUF1[MINIX_ROOT_INO];
392
393 mark_inode(MINIX_ROOT_INO);
394 inode->i_zone[0] = get_free_block();
395 inode->i_nlinks = 2;
396 inode->i_time = CUR_TIME;
397 if (G.badblocks)
398 inode->i_size = 3 * G.dirsize;
399 else {
400 G.root_block[2 * G.dirsize] = '\0';
401 G.root_block[2 * G.dirsize + 1] = '\0';
402 inode->i_size = 2 * G.dirsize;
403 }
404 inode->i_mode = S_IFDIR + 0755;
405 inode->i_uid = GETUID;
406 if (inode->i_uid)
407 inode->i_gid = GETGID;
408 write_block(inode->i_zone[0], G.root_block);
409}
410
411#if ENABLE_FEATURE_MINIX2
412static void make_root_inode2(void)
413{
414 struct minix2_inode *inode = &INODE_BUF2[MINIX_ROOT_INO];
415
416 mark_inode(MINIX_ROOT_INO);
417 inode->i_zone[0] = get_free_block();
418 inode->i_nlinks = 2;
419 inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
420 if (G.badblocks)
421 inode->i_size = 3 * G.dirsize;
422 else {
423 G.root_block[2 * G.dirsize] = '\0';
424 G.root_block[2 * G.dirsize + 1] = '\0';
425 inode->i_size = 2 * G.dirsize;
426 }
427 inode->i_mode = S_IFDIR + 0755;
428 inode->i_uid = GETUID;
429 if (inode->i_uid)
430 inode->i_gid = GETGID;
431 write_block(inode->i_zone[0], G.root_block);
432}
433#else
434void make_root_inode2(void);
435#endif
436
437/*
438 * Perform a test of a block; return the number of
439 * blocks readable.
440 */
441static size_t do_check(char *buffer, size_t try, unsigned current_block)
442{
443 ssize_t got;
444
445 /* Seek to the correct loc. */
446 msg_eol = "seek failed during testing of blocks";
447 xlseek(dev_fd, current_block * BLOCK_SIZE, SEEK_SET);
448 msg_eol = "\n";
449
450 /* Try the read */
451 got = read(dev_fd, buffer, try * BLOCK_SIZE);
452 if (got < 0)
453 got = 0;
454 try = ((size_t)got) / BLOCK_SIZE;
455
456 if (got & (BLOCK_SIZE - 1))
457 fprintf(stderr, "Short read at block %u\n", (unsigned)(current_block + try));
458 return try;
459}
460
461static void alarm_intr(int alnum UNUSED_PARAM)
462{
463 if (G.currently_testing >= SB_ZONES)
464 return;
465 signal(SIGALRM, alarm_intr);
466 alarm(5);
467 if (!G.currently_testing)
468 return;
469 printf("%d ...", G.currently_testing);
470 fflush_all();
471}
472
473static void check_blocks(void)
474{
475 size_t try, got;
476
477 G.currently_testing = 0;
478 signal(SIGALRM, alarm_intr);
479 alarm(5);
480 while (G.currently_testing < SB_ZONES) {
481 msg_eol = "seek failed in check_blocks";
482 xlseek(dev_fd, G.currently_testing * BLOCK_SIZE, SEEK_SET);
483 msg_eol = "\n";
484 try = TEST_BUFFER_BLOCKS;
485 if (G.currently_testing + try > SB_ZONES)
486 try = SB_ZONES - G.currently_testing;
487 got = do_check(G.check_blocks_buffer, try, G.currently_testing);
488 G.currently_testing += got;
489 if (got == try)
490 continue;
491 if (G.currently_testing < SB_FIRSTZONE)
492 bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
493 mark_zone(G.currently_testing);
494 G.badblocks++;
495 G.currently_testing++;
496 }
497 alarm(0);
498 printf("%d bad block(s)\n", G.badblocks);
499}
500
501static void get_list_blocks(char *filename)
502{
503 FILE *listfile;
504 unsigned long blockno;
505
506 listfile = xfopen_for_read(filename);
507 while (!feof(listfile)) {
508 fscanf(listfile, "%lu\n", &blockno);
509 mark_zone(blockno);
510 G.badblocks++;
511 }
512 printf("%d bad block(s)\n", G.badblocks);
513}
514
515static void setup_tables(void)
516{
517 unsigned long inodes;
518 unsigned norm_firstzone;
519 unsigned sb_zmaps;
520 unsigned i;
521
522 /* memset(G.superblock_buffer, 0, BLOCK_SIZE); */
523 /* memset(G.boot_block_buffer, 0, 512); */
524 SB_MAGIC = G.magic;
525 SB_ZONE_SIZE = 0;
526 SB_MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
527 if (version2)
528 SB.s_zones = G.total_blocks;
529 else
530 SB.s_nzones = G.total_blocks;
531
532 /* some magic nrs: 1 inode / 3 blocks */
533 if (G.req_nr_inodes == 0)
534 inodes = G.total_blocks / 3;
535 else
536 inodes = G.req_nr_inodes;
537 /* Round up inode count to fill block size */
538 if (version2)
539 inodes = (inodes + MINIX2_INODES_PER_BLOCK - 1) &
540 ~(MINIX2_INODES_PER_BLOCK - 1);
541 else
542 inodes = (inodes + MINIX1_INODES_PER_BLOCK - 1) &
543 ~(MINIX1_INODES_PER_BLOCK - 1);
544 if (inodes > 65535)
545 inodes = 65535;
546 SB_INODES = inodes;
547 SB_IMAPS = div_roundup(SB_INODES + 1, BITS_PER_BLOCK);
548
549 /* Real bad hack but overwise mkfs.minix can be thrown
550 * in infinite loop...
551 * try:
552 * dd if=/dev/zero of=test.fs count=10 bs=1024
553 * mkfs.minix -i 200 test.fs
554 */
555 /* This code is not insane: NORM_FIRSTZONE is not a constant,
556 * it is calculated from SB_INODES, SB_IMAPS and SB_ZMAPS */
557 i = 999;
558 SB_ZMAPS = 0;
559 do {
560 norm_firstzone = NORM_FIRSTZONE;
561 sb_zmaps = div_roundup(G.total_blocks - norm_firstzone + 1, BITS_PER_BLOCK);
562 if (SB_ZMAPS == sb_zmaps) goto got_it;
563 SB_ZMAPS = sb_zmaps;
564 /* new SB_ZMAPS, need to recalc NORM_FIRSTZONE */
565 } while (--i);
566 bb_error_msg_and_die("incompatible size/inode count, try different -i N");
567 got_it:
568
569 SB_FIRSTZONE = norm_firstzone;
570 G.inode_map = xmalloc(SB_IMAPS * BLOCK_SIZE);
571 G.zone_map = xmalloc(SB_ZMAPS * BLOCK_SIZE);
572 memset(G.inode_map, 0xff, SB_IMAPS * BLOCK_SIZE);
573 memset(G.zone_map, 0xff, SB_ZMAPS * BLOCK_SIZE);
574 for (i = SB_FIRSTZONE; i < SB_ZONES; i++)
575 unmark_zone(i);
576 for (i = MINIX_ROOT_INO; i <= SB_INODES; i++)
577 unmark_inode(i);
578 G.inode_buffer = xzalloc(INODE_BUFFER_SIZE);
579 printf("%lu inodes\n", (unsigned long)SB_INODES);
580 printf("%lu blocks\n", (unsigned long)SB_ZONES);
581 printf("Firstdatazone=%lu (%lu)\n", (unsigned long)SB_FIRSTZONE, (unsigned long)norm_firstzone);
582 printf("Zonesize=%u\n", BLOCK_SIZE << SB_ZONE_SIZE);
583 printf("Maxsize=%lu\n", (unsigned long)SB_MAXSIZE);
584}
585
586int mkfs_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
587int mkfs_minix_main(int argc UNUSED_PARAM, char **argv)
588{
589 unsigned opt;
590 char *tmp;
591 char *str_i;
592 char *listfile = NULL;
593
594 INIT_G();
595/* default (changed to 30, per Linus's suggestion, Sun Nov 21 08:05:07 1993) */
596 G.namelen = 30;
597 G.dirsize = 32;
598 G.magic = MINIX1_SUPER_MAGIC2;
599
600 if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE)
601 bb_error_msg_and_die("bad inode size");
602#if ENABLE_FEATURE_MINIX2
603 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
604 bb_error_msg_and_die("bad inode size");
605#endif
606
607 opt_complementary = "n+"; /* -n N */
608 opt = getopt32(argv, "ci:l:n:v", &str_i, &listfile, &G.namelen);
609 argv += optind;
610 //if (opt & 1) -c
611 if (opt & 2) G.req_nr_inodes = xatoul(str_i); // -i
612 //if (opt & 4) -l
613 if (opt & 8) { // -n
614 if (G.namelen == 14) G.magic = MINIX1_SUPER_MAGIC;
615 else if (G.namelen == 30) G.magic = MINIX1_SUPER_MAGIC2;
616 else bb_show_usage();
617 G.dirsize = G.namelen + 2;
618 }
619 if (opt & 0x10) { // -v
620#if ENABLE_FEATURE_MINIX2
621 version2 = 1;
622#else
623 bb_error_msg_and_die("not compiled with minix v2 support");
624#endif
625 }
626
627 G.device_name = argv[0];
628 if (!G.device_name)
629 bb_show_usage();
630
631 /* Check if it is mounted */
632 if (find_mount_point(G.device_name, 0))
633 bb_error_msg_and_die("can't format mounted filesystem");
634
635 xmove_fd(xopen(G.device_name, O_RDWR), dev_fd);
636
637 G.total_blocks = get_volume_size_in_bytes(dev_fd, argv[1], 1024, /*extend:*/ 1) / 1024;
638
639 if (G.total_blocks < 10)
640 bb_error_msg_and_die("must have at least 10 blocks");
641
642 if (version2) {
643 G.magic = MINIX2_SUPER_MAGIC2;
644 if (G.namelen == 14)
645 G.magic = MINIX2_SUPER_MAGIC;
646 } else if (G.total_blocks > 65535)
647 G.total_blocks = 65535;
648#if 0
649 struct stat statbuf;
650 xfstat(dev_fd, &statbuf, G.device_name);
651/* why? */
652 if (!S_ISBLK(statbuf.st_mode))
653 opt &= ~1; // clear -c (check)
654#if 0
655/* I don't know why someone has special code to prevent mkfs.minix
656 * on IDE devices. Why IDE but not SCSI, etc?... */
657 else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
658 /* what is this? */
659 bb_error_msg_and_die("will not try "
660 "to make filesystem on '%s'", G.device_name);
661#endif
662#endif
663 tmp = G.root_block;
664 *(short *) tmp = 1;
665 strcpy(tmp + 2, ".");
666 tmp += G.dirsize;
667 *(short *) tmp = 1;
668 strcpy(tmp + 2, "..");
669 tmp += G.dirsize;
670 *(short *) tmp = 2;
671 strcpy(tmp + 2, ".badblocks");
672
673 setup_tables();
674
675 if (opt & 1) // -c ?
676 check_blocks();
677 else if (listfile)
678 get_list_blocks(listfile);
679
680 if (version2) {
681 make_root_inode2();
682 make_bad_inode2();
683 } else {
684 make_root_inode();
685 make_bad_inode();
686 }
687
688 mark_good_blocks();
689 write_tables();
690 return 0;
691}
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