source: MondoRescue/branches/2.2.5/mindi-busybox/util-linux/mkfs_minix.c@ 1765

Last change on this file since 1765 was 1765, checked in by Bruno Cornec, 16 years ago

Update to busybox 1.7.2
File size: 18.1 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 "libbb.h"
66#include <mntent.h>
67
68#include "minix.h"
69
70#define DEBUG 0
71
72/* If debugging, store the very same times/uids/gids for image consistency */
73#if DEBUG
74# define CUR_TIME 0
75# define GETUID 0
76# define GETGID 0
77#else
78# define CUR_TIME time(NULL)
79# define GETUID getuid()
80# define GETGID getgid()
81#endif
82
83enum {
84 MAX_GOOD_BLOCKS = 512,
85 TEST_BUFFER_BLOCKS = 16,
86};
87
88#if !ENABLE_FEATURE_MINIX2
89enum { version2 = 0 };
90#endif
91
92struct globals {
93 int dev_fd;
94
95#if ENABLE_FEATURE_MINIX2
96 smallint version2;
97#define version2 G.version2
98#endif
99 char *device_name;
100 uint32_t total_blocks;
101 int badblocks;
102 int namelen;
103 int dirsize;
104 int magic;
105 char *inode_buffer;
106 char *inode_map;
107 char *zone_map;
108 int used_good_blocks;
109 unsigned long req_nr_inodes;
110 unsigned currently_testing;
111
112
113 char root_block[BLOCK_SIZE];
114 char super_block_buffer[BLOCK_SIZE];
115 char boot_block_buffer[512];
116 unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
117 /* check_blocks(): buffer[] was the biggest static in entire bbox */
118 char check_blocks_buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS];
119};
120
121#define G (*ptr_to_globals)
122
123static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
124{
125 return (size + n-1) / n;
126}
127
128#define INODE_BUF1 (((struct minix1_inode*)G.inode_buffer) - 1)
129#define INODE_BUF2 (((struct minix2_inode*)G.inode_buffer) - 1)
130
131#define SB (*(struct minix_super_block*)G.super_block_buffer)
132
133#define SB_INODES (SB.s_ninodes)
134#define SB_IMAPS (SB.s_imap_blocks)
135#define SB_ZMAPS (SB.s_zmap_blocks)
136#define SB_FIRSTZONE (SB.s_firstdatazone)
137#define SB_ZONE_SIZE (SB.s_log_zone_size)
138#define SB_MAXSIZE (SB.s_max_size)
139#define SB_MAGIC (SB.s_magic)
140
141#if !ENABLE_FEATURE_MINIX2
142# define SB_ZONES (SB.s_nzones)
143# define INODE_BLOCKS div_roundup(SB_INODES, MINIX1_INODES_PER_BLOCK)
144#else
145# define SB_ZONES (version2 ? SB.s_zones : SB.s_nzones)
146# define INODE_BLOCKS div_roundup(SB_INODES, \
147 version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK)
148#endif
149
150#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
151#define NORM_FIRSTZONE (2 + SB_IMAPS + SB_ZMAPS + INODE_BLOCKS)
152
153/* Before you ask "where they come from?": */
154/* setbit/clrbit are supplied by sys/param.h */
155
156static int minix_bit(const char* a, unsigned i)
157{
158 return a[i >> 3] & (1<<(i & 7));
159}
160
161static void minix_setbit(char *a, unsigned i)
162{
163 setbit(a, i);
164}
165static void minix_clrbit(char *a, unsigned i)
166{
167 clrbit(a, i);
168}
169
170/* Note: do not assume 0/1, it is 0/nonzero */
171#define zone_in_use(x) minix_bit(G.zone_map,(x)-SB_FIRSTZONE+1)
172/*#define inode_in_use(x) minix_bit(G.inode_map,(x))*/
173
174#define mark_inode(x) minix_setbit(G.inode_map,(x))
175#define unmark_inode(x) minix_clrbit(G.inode_map,(x))
176#define mark_zone(x) minix_setbit(G.zone_map,(x)-SB_FIRSTZONE+1)
177#define unmark_zone(x) minix_clrbit(G.zone_map,(x)-SB_FIRSTZONE+1)
178
179#ifndef BLKGETSIZE
180# define BLKGETSIZE _IO(0x12,96) /* return device size */
181#endif
182
183
184static long valid_offset(int fd, int offset)
185{
186 char ch;
187
188 if (lseek(fd, offset, SEEK_SET) < 0)
189 return 0;
190 if (read(fd, &ch, 1) < 1)
191 return 0;
192 return 1;
193}
194
195static int count_blocks(int fd)
196{
197 int high, low;
198
199 low = 0;
200 for (high = 1; valid_offset(fd, high); high *= 2)
201 low = high;
202
203 while (low < high - 1) {
204 const int mid = (low + high) / 2;
205
206 if (valid_offset(fd, mid))
207 low = mid;
208 else
209 high = mid;
210 }
211 valid_offset(fd, 0);
212 return (low + 1);
213}
214
215static int get_size(const char *file)
216{
217 int fd;
218 long size;
219
220 fd = xopen(file, O_RDWR);
221 if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
222 close(fd);
223 return (size * 512);
224 }
225
226 size = count_blocks(fd);
227 close(fd);
228 return size;
229}
230
231static void write_tables(void)
232{
233 /* Mark the super block valid. */
234 SB.s_state |= MINIX_VALID_FS;
235 SB.s_state &= ~MINIX_ERROR_FS;
236
237 msg_eol = "seek to 0 failed";
238 xlseek(G.dev_fd, 0, SEEK_SET);
239
240 msg_eol = "cannot clear boot sector";
241 xwrite(G.dev_fd, G.boot_block_buffer, 512);
242
243 msg_eol = "seek to BLOCK_SIZE failed";
244 xlseek(G.dev_fd, BLOCK_SIZE, SEEK_SET);
245
246 msg_eol = "cannot write superblock";
247 xwrite(G.dev_fd, G.super_block_buffer, BLOCK_SIZE);
248
249 msg_eol = "cannot write inode map";
250 xwrite(G.dev_fd, G.inode_map, SB_IMAPS * BLOCK_SIZE);
251
252 msg_eol = "cannot write zone map";
253 xwrite(G.dev_fd, G.zone_map, SB_ZMAPS * BLOCK_SIZE);
254
255 msg_eol = "cannot write inodes";
256 xwrite(G.dev_fd, G.inode_buffer, INODE_BUFFER_SIZE);
257
258 msg_eol = "\n";
259}
260
261static void write_block(int blk, char *buffer)
262{
263 xlseek(G.dev_fd, blk * BLOCK_SIZE, SEEK_SET);
264 xwrite(G.dev_fd, buffer, BLOCK_SIZE);
265}
266
267static int get_free_block(void)
268{
269 int blk;
270
271 if (G.used_good_blocks + 1 >= MAX_GOOD_BLOCKS)
272 bb_error_msg_and_die("too many bad blocks");
273 if (G.used_good_blocks)
274 blk = G.good_blocks_table[G.used_good_blocks - 1] + 1;
275 else
276 blk = SB_FIRSTZONE;
277 while (blk < SB_ZONES && zone_in_use(blk))
278 blk++;
279 if (blk >= SB_ZONES)
280 bb_error_msg_and_die("not enough good blocks");
281 G.good_blocks_table[G.used_good_blocks] = blk;
282 G.used_good_blocks++;
283 return blk;
284}
285
286static void mark_good_blocks(void)
287{
288 int blk;
289
290 for (blk = 0; blk < G.used_good_blocks; blk++)
291 mark_zone(G.good_blocks_table[blk]);
292}
293
294static int next(int zone)
295{
296 if (!zone)
297 zone = SB_FIRSTZONE - 1;
298 while (++zone < SB_ZONES)
299 if (zone_in_use(zone))
300 return zone;
301 return 0;
302}
303
304static void make_bad_inode(void)
305{
306 struct minix1_inode *inode = &INODE_BUF1[MINIX_BAD_INO];
307 int i, j, zone;
308 int ind = 0, dind = 0;
309 unsigned short ind_block[BLOCK_SIZE >> 1];
310 unsigned short dind_block[BLOCK_SIZE >> 1];
311
312#define NEXT_BAD (zone = next(zone))
313
314 if (!G.badblocks)
315 return;
316 mark_inode(MINIX_BAD_INO);
317 inode->i_nlinks = 1;
318 /* BTW, setting this makes all images different */
319 /* it's harder to check for bugs then - diff isn't helpful :(... */
320 inode->i_time = CUR_TIME;
321 inode->i_mode = S_IFREG + 0000;
322 inode->i_size = G.badblocks * BLOCK_SIZE;
323 zone = next(0);
324 for (i = 0; i < 7; i++) {
325 inode->i_zone[i] = zone;
326 if (!NEXT_BAD)
327 goto end_bad;
328 }
329 inode->i_zone[7] = ind = get_free_block();
330 memset(ind_block, 0, BLOCK_SIZE);
331 for (i = 0; i < 512; i++) {
332 ind_block[i] = zone;
333 if (!NEXT_BAD)
334 goto end_bad;
335 }
336 inode->i_zone[8] = dind = get_free_block();
337 memset(dind_block, 0, BLOCK_SIZE);
338 for (i = 0; i < 512; i++) {
339 write_block(ind, (char *) ind_block);
340 dind_block[i] = ind = get_free_block();
341 memset(ind_block, 0, BLOCK_SIZE);
342 for (j = 0; j < 512; j++) {
343 ind_block[j] = zone;
344 if (!NEXT_BAD)
345 goto end_bad;
346 }
347 }
348 bb_error_msg_and_die("too many bad blocks");
349 end_bad:
350 if (ind)
351 write_block(ind, (char *) ind_block);
352 if (dind)
353 write_block(dind, (char *) dind_block);
354}
355
356#if ENABLE_FEATURE_MINIX2
357static void make_bad_inode2(void)
358{
359 struct minix2_inode *inode = &INODE_BUF2[MINIX_BAD_INO];
360 int i, j, zone;
361 int ind = 0, dind = 0;
362 unsigned long ind_block[BLOCK_SIZE >> 2];
363 unsigned long dind_block[BLOCK_SIZE >> 2];
364
365 if (!G.badblocks)
366 return;
367 mark_inode(MINIX_BAD_INO);
368 inode->i_nlinks = 1;
369 inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
370 inode->i_mode = S_IFREG + 0000;
371 inode->i_size = G.badblocks * BLOCK_SIZE;
372 zone = next(0);
373 for (i = 0; i < 7; i++) {
374 inode->i_zone[i] = zone;
375 if (!NEXT_BAD)
376 goto end_bad;
377 }
378 inode->i_zone[7] = ind = get_free_block();
379 memset(ind_block, 0, BLOCK_SIZE);
380 for (i = 0; i < 256; i++) {
381 ind_block[i] = zone;
382 if (!NEXT_BAD)
383 goto end_bad;
384 }
385 inode->i_zone[8] = dind = get_free_block();
386 memset(dind_block, 0, BLOCK_SIZE);
387 for (i = 0; i < 256; i++) {
388 write_block(ind, (char *) ind_block);
389 dind_block[i] = ind = get_free_block();
390 memset(ind_block, 0, BLOCK_SIZE);
391 for (j = 0; j < 256; j++) {
392 ind_block[j] = zone;
393 if (!NEXT_BAD)
394 goto end_bad;
395 }
396 }
397 /* Could make triple indirect block here */
398 bb_error_msg_and_die("too many bad blocks");
399 end_bad:
400 if (ind)
401 write_block(ind, (char *) ind_block);
402 if (dind)
403 write_block(dind, (char *) dind_block);
404}
405#else
406void make_bad_inode2(void);
407#endif
408
409static void make_root_inode(void)
410{
411 struct minix1_inode *inode = &INODE_BUF1[MINIX_ROOT_INO];
412
413 mark_inode(MINIX_ROOT_INO);
414 inode->i_zone[0] = get_free_block();
415 inode->i_nlinks = 2;
416 inode->i_time = CUR_TIME;
417 if (G.badblocks)
418 inode->i_size = 3 * G.dirsize;
419 else {
420 G.root_block[2 * G.dirsize] = '\0';
421 G.root_block[2 * G.dirsize + 1] = '\0';
422 inode->i_size = 2 * G.dirsize;
423 }
424 inode->i_mode = S_IFDIR + 0755;
425 inode->i_uid = GETUID;
426 if (inode->i_uid)
427 inode->i_gid = GETGID;
428 write_block(inode->i_zone[0], G.root_block);
429}
430
431#if ENABLE_FEATURE_MINIX2
432static void make_root_inode2(void)
433{
434 struct minix2_inode *inode = &INODE_BUF2[MINIX_ROOT_INO];
435
436 mark_inode(MINIX_ROOT_INO);
437 inode->i_zone[0] = get_free_block();
438 inode->i_nlinks = 2;
439 inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
440 if (G.badblocks)
441 inode->i_size = 3 * G.dirsize;
442 else {
443 G.root_block[2 * G.dirsize] = '\0';
444 G.root_block[2 * G.dirsize + 1] = '\0';
445 inode->i_size = 2 * G.dirsize;
446 }
447 inode->i_mode = S_IFDIR + 0755;
448 inode->i_uid = GETUID;
449 if (inode->i_uid)
450 inode->i_gid = GETGID;
451 write_block(inode->i_zone[0], G.root_block);
452}
453#else
454void make_root_inode2(void);
455#endif
456
457/*
458 * Perform a test of a block; return the number of
459 * blocks readable.
460 */
461static size_t do_check(char *buffer, size_t try, unsigned current_block)
462{
463 ssize_t got;
464
465 /* Seek to the correct loc. */
466 msg_eol = "seek failed during testing of blocks";
467 xlseek(G.dev_fd, current_block * BLOCK_SIZE, SEEK_SET);
468 msg_eol = "\n";
469
470 /* Try the read */
471 got = read(G.dev_fd, buffer, try * BLOCK_SIZE);
472 if (got < 0)
473 got = 0;
474 try = ((size_t)got) / BLOCK_SIZE;
475
476 if (got & (BLOCK_SIZE - 1))
477 fprintf(stderr, "Short read at block %u\n", (unsigned)(current_block + try));
478 return try;
479}
480
481static void alarm_intr(int alnum)
482{
483 if (G.currently_testing >= SB_ZONES)
484 return;
485 signal(SIGALRM, alarm_intr);
486 alarm(5);
487 if (!G.currently_testing)
488 return;
489 printf("%d ...", G.currently_testing);
490 fflush(stdout);
491}
492
493static void check_blocks(void)
494{
495 size_t try, got;
496
497 G.currently_testing = 0;
498 signal(SIGALRM, alarm_intr);
499 alarm(5);
500 while (G.currently_testing < SB_ZONES) {
501 msg_eol = "seek failed in check_blocks";
502 xlseek(G.dev_fd, G.currently_testing * BLOCK_SIZE, SEEK_SET);
503 msg_eol = "\n";
504 try = TEST_BUFFER_BLOCKS;
505 if (G.currently_testing + try > SB_ZONES)
506 try = SB_ZONES - G.currently_testing;
507 got = do_check(G.check_blocks_buffer, try, G.currently_testing);
508 G.currently_testing += got;
509 if (got == try)
510 continue;
511 if (G.currently_testing < SB_FIRSTZONE)
512 bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
513 mark_zone(G.currently_testing);
514 G.badblocks++;
515 G.currently_testing++;
516 }
517 alarm(0);
518 printf("%d bad block(s)\n", G.badblocks);
519}
520
521static void get_list_blocks(char *filename)
522{
523 FILE *listfile;
524 unsigned long blockno;
525
526 listfile = xfopen(filename, "r");
527 while (!feof(listfile)) {
528 fscanf(listfile, "%ld\n", &blockno);
529 mark_zone(blockno);
530 G.badblocks++;
531 }
532 printf("%d bad block(s)\n", G.badblocks);
533}
534
535static void setup_tables(void)
536{
537 unsigned long inodes;
538 unsigned norm_firstzone;
539 unsigned sb_zmaps;
540 unsigned i;
541
542 /* memset(G.super_block_buffer, 0, BLOCK_SIZE); */
543 /* memset(G.boot_block_buffer, 0, 512); */
544 SB_MAGIC = G.magic;
545 SB_ZONE_SIZE = 0;
546 SB_MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
547 if (version2)
548 SB.s_zones = G.total_blocks;
549 else
550 SB.s_nzones = G.total_blocks;
551
552 /* some magic nrs: 1 inode / 3 blocks */
553 if (G.req_nr_inodes == 0)
554 inodes = G.total_blocks / 3;
555 else
556 inodes = G.req_nr_inodes;
557 /* Round up inode count to fill block size */
558 if (version2)
559 inodes = (inodes + MINIX2_INODES_PER_BLOCK - 1) &
560 ~(MINIX2_INODES_PER_BLOCK - 1);
561 else
562 inodes = (inodes + MINIX1_INODES_PER_BLOCK - 1) &
563 ~(MINIX1_INODES_PER_BLOCK - 1);
564 if (inodes > 65535)
565 inodes = 65535;
566 SB_INODES = inodes;
567 SB_IMAPS = div_roundup(SB_INODES + 1, BITS_PER_BLOCK);
568
569 /* Real bad hack but overwise mkfs.minix can be thrown
570 * in infinite loop...
571 * try:
572 * dd if=/dev/zero of=test.fs count=10 bs=1024
573 * mkfs.minix -i 200 test.fs
574 */
575 /* This code is not insane: NORM_FIRSTZONE is not a constant,
576 * it is calculated from SB_INODES, SB_IMAPS and SB_ZMAPS */
577 i = 999;
578 SB_ZMAPS = 0;
579 do {
580 norm_firstzone = NORM_FIRSTZONE;
581 sb_zmaps = div_roundup(G.total_blocks - norm_firstzone + 1, BITS_PER_BLOCK);
582 if (SB_ZMAPS == sb_zmaps) goto got_it;
583 SB_ZMAPS = sb_zmaps;
584 /* new SB_ZMAPS, need to recalc NORM_FIRSTZONE */
585 } while (--i);
586 bb_error_msg_and_die("incompatible size/inode count, try different -i N");
587 got_it:
588
589 SB_FIRSTZONE = norm_firstzone;
590 G.inode_map = xmalloc(SB_IMAPS * BLOCK_SIZE);
591 G.zone_map = xmalloc(SB_ZMAPS * BLOCK_SIZE);
592 memset(G.inode_map, 0xff, SB_IMAPS * BLOCK_SIZE);
593 memset(G.zone_map, 0xff, SB_ZMAPS * BLOCK_SIZE);
594 for (i = SB_FIRSTZONE; i < SB_ZONES; i++)
595 unmark_zone(i);
596 for (i = MINIX_ROOT_INO; i <= SB_INODES; i++)
597 unmark_inode(i);
598 G.inode_buffer = xzalloc(INODE_BUFFER_SIZE);
599 printf("%ld inodes\n", (long)SB_INODES);
600 printf("%ld blocks\n", (long)SB_ZONES);
601 printf("Firstdatazone=%ld (%ld)\n", (long)SB_FIRSTZONE, (long)norm_firstzone);
602 printf("Zonesize=%d\n", BLOCK_SIZE << SB_ZONE_SIZE);
603 printf("Maxsize=%ld\n", (long)SB_MAXSIZE);
604}
605
606int mkfs_minix_main(int argc, char **argv);
607int mkfs_minix_main(int argc, char **argv)
608{
609 struct mntent *mp;
610 unsigned opt;
611 char *tmp;
612 struct stat statbuf;
613 char *str_i, *str_n;
614 char *listfile = NULL;
615
616 PTR_TO_GLOBALS = xzalloc(sizeof(G));
617/* default (changed to 30, per Linus's suggestion, Sun Nov 21 08:05:07 1993) */
618 G.namelen = 30;
619 G.dirsize = 32;
620 G.magic = MINIX1_SUPER_MAGIC2;
621
622 if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE)
623 bb_error_msg_and_die("bad inode size");
624#if ENABLE_FEATURE_MINIX2
625 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
626 bb_error_msg_and_die("bad inode size");
627#endif
628
629 opt = getopt32(argv, "ci:l:n:v", &str_i, &listfile, &str_n);
630 argv += optind;
631 //if (opt & 1) -c
632 if (opt & 2) G.req_nr_inodes = xatoul(str_i); // -i
633 //if (opt & 4) -l
634 if (opt & 8) { // -n
635 G.namelen = xatoi_u(str_n);
636 if (G.namelen == 14) G.magic = MINIX1_SUPER_MAGIC;
637 else if (G.namelen == 30) G.magic = MINIX1_SUPER_MAGIC2;
638 else bb_show_usage();
639 G.dirsize = G.namelen + 2;
640 }
641 if (opt & 0x10) { // -v
642#if ENABLE_FEATURE_MINIX2
643 version2 = 1;
644#else
645 bb_error_msg_and_die("not compiled with minix v2 support");
646#endif
647 }
648
649 G.device_name = *argv++;
650 if (!G.device_name)
651 bb_show_usage();
652 if (*argv)
653 G.total_blocks = xatou32(*argv);
654 else
655 G.total_blocks = get_size(G.device_name) / 1024;
656
657 if (G.total_blocks < 10)
658 bb_error_msg_and_die("must have at least 10 blocks");
659
660 if (version2) {
661 G.magic = MINIX2_SUPER_MAGIC2;
662 if (G.namelen == 14)
663 G.magic = MINIX2_SUPER_MAGIC;
664 } else if (G.total_blocks > 65535)
665 G.total_blocks = 65535;
666
667 /* Check if it is mounted */
668 mp = find_mount_point(G.device_name, NULL);
669 if (mp && strcmp(G.device_name, mp->mnt_fsname) == 0)
670 bb_error_msg_and_die("%s is mounted on %s; "
671 "refusing to make a filesystem",
672 G.device_name, mp->mnt_dir);
673
674 G.dev_fd = xopen(G.device_name, O_RDWR);
675 if (fstat(G.dev_fd, &statbuf) < 0)
676 bb_error_msg_and_die("cannot stat %s", G.device_name);
677 if (!S_ISBLK(statbuf.st_mode))
678 opt &= ~1; // clear -c (check)
679
680/* I don't know why someone has special code to prevent mkfs.minix
681 * on IDE devices. Why IDE but not SCSI, etc?... */
682#if 0
683 else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
684 /* what is this? */
685 bb_error_msg_and_die("will not try "
686 "to make filesystem on '%s'", G.device_name);
687#endif
688
689 tmp = G.root_block;
690 *(short *) tmp = 1;
691 strcpy(tmp + 2, ".");
692 tmp += G.dirsize;
693 *(short *) tmp = 1;
694 strcpy(tmp + 2, "..");
695 tmp += G.dirsize;
696 *(short *) tmp = 2;
697 strcpy(tmp + 2, ".badblocks");
698
699 setup_tables();
700
701 if (opt & 1) // -c ?
702 check_blocks();
703 else if (listfile)
704 get_list_blocks(listfile);
705
706 if (version2) {
707 make_root_inode2();
708 make_bad_inode2();
709 } else {
710 make_root_inode();
711 make_bad_inode();
712 }
713
714 mark_good_blocks();
715 write_tables();
716 return 0;
717}
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