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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 BLOCK_SIZE_BITS 10
155#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
156
157#define NAME_MAX 255 /* # chars in a file name */
158
159#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
160
161#define MINIX_VALID_FS 0x0001 /* Clean fs. */
162#define MINIX_ERROR_FS 0x0002 /* fs has errors. */
163
164#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
165#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
166
167#ifndef BLKGETSIZE
168#define BLKGETSIZE _IO(0x12,96) /* return device size */
169#endif
170
171
172#ifndef __linux__
173#define volatile
174#endif
175
176#define MINIX_ROOT_INO 1
177#define MINIX_BAD_INO 2
178
179#define TEST_BUFFER_BLOCKS 16
180#define MAX_GOOD_BLOCKS 512
181
182#define UPPER(size,n) (((size)+((n)-1))/(n))
183#define INODE_SIZE (sizeof(struct minix_inode))
184#ifdef CONFIG_FEATURE_MINIX2
185#define INODE_SIZE2 (sizeof(struct minix2_inode))
186#define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
187 : MINIX_INODES_PER_BLOCK))
188#else
189#define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
190#endif
191#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
192
193#define BITS_PER_BLOCK (BLOCK_SIZE<<3)
194
195static char *device_name = NULL;
196static int DEV = -1;
197static uint32_t BLOCKS = 0;
198static int check = 0;
199static int badblocks = 0;
200static int namelen = 30; /* default (changed to 30, per Linus's
201
202 suggestion, Sun Nov 21 08:05:07 1993) */
203static int dirsize = 32;
204static int magic = MINIX_SUPER_MAGIC2;
205static int version2 = 0;
206
207static char root_block[BLOCK_SIZE] = "\0";
208
209static char *inode_buffer = NULL;
210
211#define Inode (((struct minix_inode *) inode_buffer)-1)
212#ifdef CONFIG_FEATURE_MINIX2
213#define Inode2 (((struct minix2_inode *) inode_buffer)-1)
214#endif
215static char super_block_buffer[BLOCK_SIZE];
216static char boot_block_buffer[512];
217
218#define Super (*(struct minix_super_block *)super_block_buffer)
219#define INODES (Super.s_ninodes)
220#ifdef CONFIG_FEATURE_MINIX2
221#define ZONES (version2 ? Super.s_zones : Super.s_nzones)
222#else
223#define ZONES (Super.s_nzones)
224#endif
225#define IMAPS (Super.s_imap_blocks)
226#define ZMAPS (Super.s_zmap_blocks)
227#define FIRSTZONE (Super.s_firstdatazone)
228#define ZONESIZE (Super.s_log_zone_size)
229#define MAXSIZE (Super.s_max_size)
230#define MAGIC (Super.s_magic)
231#define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
232
233static char *inode_map;
234static char *zone_map;
235
236static unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
237static int used_good_blocks = 0;
238static unsigned long req_nr_inodes = 0;
239
240static inline int bit(char * a,unsigned int i)
241{
242 return (a[i >> 3] & (1<<(i & 7))) != 0;
243}
244#define inode_in_use(x) (bit(inode_map,(x)))
245#define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
246
247#define mark_inode(x) (setbit(inode_map,(x)))
248#define unmark_inode(x) (clrbit(inode_map,(x)))
249
250#define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1))
251#define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1))
252
253/*
254 * Check to make certain that our new filesystem won't be created on
255 * an already mounted partition. Code adapted from mke2fs, Copyright
256 * (C) 1994 Theodore Ts'o. Also licensed under GPL.
257 */
258static inline void check_mount(void)
259{
260 FILE *f;
261 struct mntent *mnt;
262
263 if ((f = setmntent(MOUNTED, "r")) == NULL)
264 return;
265 while ((mnt = getmntent(f)) != NULL)
266 if (strcmp(device_name, mnt->mnt_fsname) == 0)
267 break;
268 endmntent(f);
269 if (!mnt)
270 return;
271
272 bb_error_msg_and_die("%s is mounted; will not make a filesystem here!", device_name);
273}
274
275static long valid_offset(int fd, int offset)
276{
277 char ch;
278
279 if (lseek(fd, offset, 0) < 0)
280 return 0;
281 if (read(fd, &ch, 1) < 1)
282 return 0;
283 return 1;
284}
285
286static inline int count_blocks(int fd)
287{
288 int high, low;
289
290 low = 0;
291 for (high = 1; valid_offset(fd, high); high *= 2)
292 low = high;
293 while (low < high - 1) {
294 const int mid = (low + high) / 2;
295
296 if (valid_offset(fd, mid))
297 low = mid;
298 else
299 high = mid;
300 }
301 valid_offset(fd, 0);
302 return (low + 1);
303}
304
305static inline int get_size(const char *file)
306{
307 int fd;
308 long size;
309
310 if ((fd = open(file, O_RDWR)) < 0)
311 bb_perror_msg_and_die("%s", file);
312 if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
313 close(fd);
314 return (size * 512);
315 }
316
317 size = count_blocks(fd);
318 close(fd);
319 return size;
320}
321
322static inline void write_tables(void)
323{
324 /* Mark the super block valid. */
325 Super.s_state |= MINIX_VALID_FS;
326 Super.s_state &= ~MINIX_ERROR_FS;
327
328 if (lseek(DEV, 0, SEEK_SET))
329 bb_error_msg_and_die("seek to boot block failed in write_tables");
330 if (512 != write(DEV, boot_block_buffer, 512))
331 bb_error_msg_and_die("unable to clear boot sector");
332 if (BLOCK_SIZE != lseek(DEV, BLOCK_SIZE, SEEK_SET))
333 bb_error_msg_and_die("seek failed in write_tables");
334 if (BLOCK_SIZE != write(DEV, super_block_buffer, BLOCK_SIZE))
335 bb_error_msg_and_die("unable to write super-block");
336 if (IMAPS * BLOCK_SIZE != write(DEV, inode_map, IMAPS * BLOCK_SIZE))
337 bb_error_msg_and_die("unable to write inode map");
338 if (ZMAPS * BLOCK_SIZE != write(DEV, zone_map, ZMAPS * BLOCK_SIZE))
339 bb_error_msg_and_die("unable to write zone map");
340 if (INODE_BUFFER_SIZE != write(DEV, inode_buffer, INODE_BUFFER_SIZE))
341 bb_error_msg_and_die("unable to write inodes");
342
343}
344
345static void write_block(int blk, char *buffer)
346{
347 if (blk * BLOCK_SIZE != lseek(DEV, blk * BLOCK_SIZE, SEEK_SET))
348 bb_error_msg_and_die("seek failed in write_block");
349 if (BLOCK_SIZE != write(DEV, buffer, BLOCK_SIZE))
350 bb_error_msg_and_die("write failed in write_block");
351}
352
353static int get_free_block(void)
354{
355 int blk;
356
357 if (used_good_blocks + 1 >= MAX_GOOD_BLOCKS)
358 bb_error_msg_and_die("too many bad blocks");
359 if (used_good_blocks)
360 blk = good_blocks_table[used_good_blocks - 1] + 1;
361 else
362 blk = FIRSTZONE;
363 while (blk < ZONES && zone_in_use(blk))
364 blk++;
365 if (blk >= ZONES)
366 bb_error_msg_and_die("not enough good blocks");
367 good_blocks_table[used_good_blocks] = blk;
368 used_good_blocks++;
369 return blk;
370}
371
372static inline void mark_good_blocks(void)
373{
374 int blk;
375
376 for (blk = 0; blk < used_good_blocks; blk++)
377 mark_zone(good_blocks_table[blk]);
378}
379
380static int next(int zone)
381{
382 if (!zone)
383 zone = FIRSTZONE - 1;
384 while (++zone < ZONES)
385 if (zone_in_use(zone))
386 return zone;
387 return 0;
388}
389
390static inline void make_bad_inode(void)
391{
392 struct minix_inode *inode = &Inode[MINIX_BAD_INO];
393 int i, j, zone;
394 int ind = 0, dind = 0;
395 unsigned short ind_block[BLOCK_SIZE >> 1];
396 unsigned short dind_block[BLOCK_SIZE >> 1];
397
398#define NEXT_BAD (zone = next(zone))
399
400 if (!badblocks)
401 return;
402 mark_inode(MINIX_BAD_INO);
403 inode->i_nlinks = 1;
404 inode->i_time = time(NULL);
405 inode->i_mode = S_IFREG + 0000;
406 inode->i_size = badblocks * BLOCK_SIZE;
407 zone = next(0);
408 for (i = 0; i < 7; i++) {
409 inode->i_zone[i] = zone;
410 if (!NEXT_BAD)
411 goto end_bad;
412 }
413 inode->i_zone[7] = ind = get_free_block();
414 memset(ind_block, 0, BLOCK_SIZE);
415 for (i = 0; i < 512; i++) {
416 ind_block[i] = zone;
417 if (!NEXT_BAD)
418 goto end_bad;
419 }
420 inode->i_zone[8] = dind = get_free_block();
421 memset(dind_block, 0, BLOCK_SIZE);
422 for (i = 0; i < 512; i++) {
423 write_block(ind, (char *) ind_block);
424 dind_block[i] = ind = get_free_block();
425 memset(ind_block, 0, BLOCK_SIZE);
426 for (j = 0; j < 512; j++) {
427 ind_block[j] = zone;
428 if (!NEXT_BAD)
429 goto end_bad;
430 }
431 }
432 bb_error_msg_and_die("too many bad blocks");
433 end_bad:
434 if (ind)
435 write_block(ind, (char *) ind_block);
436 if (dind)
437 write_block(dind, (char *) dind_block);
438}
439
440#ifdef CONFIG_FEATURE_MINIX2
441static inline void make_bad_inode2(void)
442{
443 struct minix2_inode *inode = &Inode2[MINIX_BAD_INO];
444 int i, j, zone;
445 int ind = 0, dind = 0;
446 unsigned long ind_block[BLOCK_SIZE >> 2];
447 unsigned long dind_block[BLOCK_SIZE >> 2];
448
449 if (!badblocks)
450 return;
451 mark_inode(MINIX_BAD_INO);
452 inode->i_nlinks = 1;
453 inode->i_atime = inode->i_mtime = inode->i_ctime = time(NULL);
454 inode->i_mode = S_IFREG + 0000;
455 inode->i_size = badblocks * BLOCK_SIZE;
456 zone = next(0);
457 for (i = 0; i < 7; i++) {
458 inode->i_zone[i] = zone;
459 if (!NEXT_BAD)
460 goto end_bad;
461 }
462 inode->i_zone[7] = ind = get_free_block();
463 memset(ind_block, 0, BLOCK_SIZE);
464 for (i = 0; i < 256; i++) {
465 ind_block[i] = zone;
466 if (!NEXT_BAD)
467 goto end_bad;
468 }
469 inode->i_zone[8] = dind = get_free_block();
470 memset(dind_block, 0, BLOCK_SIZE);
471 for (i = 0; i < 256; i++) {
472 write_block(ind, (char *) ind_block);
473 dind_block[i] = ind = get_free_block();
474 memset(ind_block, 0, BLOCK_SIZE);
475 for (j = 0; j < 256; j++) {
476 ind_block[j] = zone;
477 if (!NEXT_BAD)
478 goto end_bad;
479 }
480 }
481 /* Could make triple indirect block here */
482 bb_error_msg_and_die("too many bad blocks");
483 end_bad:
484 if (ind)
485 write_block(ind, (char *) ind_block);
486 if (dind)
487 write_block(dind, (char *) dind_block);
488}
489#endif
490
491static inline void make_root_inode(void)
492{
493 struct minix_inode *inode = &Inode[MINIX_ROOT_INO];
494
495 mark_inode(MINIX_ROOT_INO);
496 inode->i_zone[0] = get_free_block();
497 inode->i_nlinks = 2;
498 inode->i_time = time(NULL);
499 if (badblocks)
500 inode->i_size = 3 * dirsize;
501 else {
502 root_block[2 * dirsize] = '\0';
503 root_block[2 * dirsize + 1] = '\0';
504 inode->i_size = 2 * dirsize;
505 }
506 inode->i_mode = S_IFDIR + 0755;
507 inode->i_uid = getuid();
508 if (inode->i_uid)
509 inode->i_gid = getgid();
510 write_block(inode->i_zone[0], root_block);
511}
512
513#ifdef CONFIG_FEATURE_MINIX2
514static inline void make_root_inode2(void)
515{
516 struct minix2_inode *inode = &Inode2[MINIX_ROOT_INO];
517
518 mark_inode(MINIX_ROOT_INO);
519 inode->i_zone[0] = get_free_block();
520 inode->i_nlinks = 2;
521 inode->i_atime = inode->i_mtime = inode->i_ctime = time(NULL);
522 if (badblocks)
523 inode->i_size = 3 * dirsize;
524 else {
525 root_block[2 * dirsize] = '\0';
526 root_block[2 * dirsize + 1] = '\0';
527 inode->i_size = 2 * dirsize;
528 }
529 inode->i_mode = S_IFDIR + 0755;
530 inode->i_uid = getuid();
531 if (inode->i_uid)
532 inode->i_gid = getgid();
533 write_block(inode->i_zone[0], root_block);
534}
535#endif
536
537static inline void setup_tables(void)
538{
539 int i;
540 unsigned long inodes;
541
542 memset(super_block_buffer, 0, BLOCK_SIZE);
543 memset(boot_block_buffer, 0, 512);
544 MAGIC = magic;
545 ZONESIZE = 0;
546 MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
547#ifdef CONFIG_FEATURE_MINIX2
548 if (version2) {
549 Super.s_zones = BLOCKS;
550 } else
551#endif
552 Super.s_nzones = BLOCKS;
553
554/* some magic nrs: 1 inode / 3 blocks */
555 if (req_nr_inodes == 0)
556 inodes = BLOCKS / 3;
557 else
558 inodes = req_nr_inodes;
559 /* Round up inode count to fill block size */
560#ifdef CONFIG_FEATURE_MINIX2
561 if (version2)
562 inodes = ((inodes + MINIX2_INODES_PER_BLOCK - 1) &
563 ~(MINIX2_INODES_PER_BLOCK - 1));
564 else
565#endif
566 inodes = ((inodes + MINIX_INODES_PER_BLOCK - 1) &
567 ~(MINIX_INODES_PER_BLOCK - 1));
568 if (inodes > 65535)
569 inodes = 65535;
570 INODES = inodes;
571 IMAPS = UPPER(INODES + 1, BITS_PER_BLOCK);
572 ZMAPS = 0;
573 i = 0;
574 while (ZMAPS !=
575 UPPER(BLOCKS - (2 + IMAPS + ZMAPS + INODE_BLOCKS) + 1,
576 BITS_PER_BLOCK) && i < 1000) {
577 ZMAPS =
578 UPPER(BLOCKS - (2 + IMAPS + ZMAPS + INODE_BLOCKS) + 1,
579 BITS_PER_BLOCK);
580 i++;
581 }
582 /* Real bad hack but overwise mkfs.minix can be thrown
583 * in infinite loop...
584 * try:
585 * dd if=/dev/zero of=test.fs count=10 bs=1024
586 * /sbin/mkfs.minix -i 200 test.fs
587 * */
588 if (i >= 999) {
589 bb_error_msg_and_die("unable to allocate buffers for maps");
590 }
591 FIRSTZONE = NORM_FIRSTZONE;
592 inode_map = xmalloc(IMAPS * BLOCK_SIZE);
593 zone_map = xmalloc(ZMAPS * BLOCK_SIZE);
594 memset(inode_map, 0xff, IMAPS * BLOCK_SIZE);
595 memset(zone_map, 0xff, ZMAPS * BLOCK_SIZE);
596 for (i = FIRSTZONE; i < ZONES; i++)
597 unmark_zone(i);
598 for (i = MINIX_ROOT_INO; i <= INODES; i++)
599 unmark_inode(i);
600 inode_buffer = xmalloc(INODE_BUFFER_SIZE);
601 memset(inode_buffer, 0, INODE_BUFFER_SIZE);
602 printf("%ld inodes\n", (long)INODES);
603 printf("%ld blocks\n", (long)ZONES);
604 printf("Firstdatazone=%ld (%ld)\n", (long)FIRSTZONE, (long)NORM_FIRSTZONE);
605 printf("Zonesize=%d\n", BLOCK_SIZE << ZONESIZE);
606 printf("Maxsize=%ld\n\n", (long)MAXSIZE);
607}
608
609/*
610 * Perform a test of a block; return the number of
611 * blocks readable/writable.
612 */
613static inline long do_check(char *buffer, int try, unsigned int current_block)
614{
615 long got;
616
617 /* Seek to the correct loc. */
618 if (lseek(DEV, current_block * BLOCK_SIZE, SEEK_SET) !=
619 current_block * BLOCK_SIZE) {
620 bb_error_msg_and_die("seek failed during testing of blocks");
621 }
622
623
624 /* Try the read */
625 got = read(DEV, buffer, try * BLOCK_SIZE);
626 if (got < 0)
627 got = 0;
628 if (got & (BLOCK_SIZE - 1)) {
629 printf("Weird values in do_check: probably bugs\n");
630 }
631 got /= BLOCK_SIZE;
632 return got;
633}
634
635static unsigned int currently_testing = 0;
636
637static void alarm_intr(int alnum)
638{
639 if (currently_testing >= ZONES)
640 return;
641 signal(SIGALRM, alarm_intr);
642 alarm(5);
643 if (!currently_testing)
644 return;
645 printf("%d ...", currently_testing);
646 fflush(stdout);
647}
648
649static void check_blocks(void)
650{
651 int try, got;
652 static char buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS];
653
654 currently_testing = 0;
655 signal(SIGALRM, alarm_intr);
656 alarm(5);
657 while (currently_testing < ZONES) {
658 if (lseek(DEV, currently_testing * BLOCK_SIZE, SEEK_SET) !=
659 currently_testing * BLOCK_SIZE)
660 bb_error_msg_and_die("seek failed in check_blocks");
661 try = TEST_BUFFER_BLOCKS;
662 if (currently_testing + try > ZONES)
663 try = ZONES - currently_testing;
664 got = do_check(buffer, try, currently_testing);
665 currently_testing += got;
666 if (got == try)
667 continue;
668 if (currently_testing < FIRSTZONE)
669 bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
670 mark_zone(currently_testing);
671 badblocks++;
672 currently_testing++;
673 }
674 if (badblocks > 1)
675 printf("%d bad blocks\n", badblocks);
676 else if (badblocks == 1)
677 printf("one bad block\n");
678}
679
680static void get_list_blocks(char *filename)
681{
682 FILE *listfile;
683 unsigned long blockno;
684
685 listfile = bb_xfopen(filename, "r");
686 while (!feof(listfile)) {
687 fscanf(listfile, "%ld\n", &blockno);
688 mark_zone(blockno);
689 badblocks++;
690 }
691 if (badblocks > 1)
692 printf("%d bad blocks\n", badblocks);
693 else if (badblocks == 1)
694 printf("one bad block\n");
695}
696
697extern int mkfs_minix_main(int argc, char **argv)
698{
699 int i=1;
700 char *tmp;
701 struct stat statbuf;
702 char *listfile = NULL;
703 int stopIt=FALSE;
704
705 if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
706 bb_error_msg_and_die("bad inode size");
707#ifdef CONFIG_FEATURE_MINIX2
708 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
709 bb_error_msg_and_die("bad inode size");
710#endif
711
712 /* Parse options */
713 argv++;
714 while (--argc >= 0 && *argv && **argv) {
715 if (**argv == '-') {
716 stopIt=FALSE;
717 while (i > 0 && *++(*argv) && stopIt==FALSE) {
718 switch (**argv) {
719 case 'c':
720 check = 1;
721 break;
722 case 'i':
723 {
724 char *cp=NULL;
725 if (*(*argv+1) != 0) {
726 cp = ++(*argv);
727 } else {
728 if (--argc == 0) {
729 goto goodbye;
730 }
731 cp = *(++argv);
732 }
733 req_nr_inodes = strtoul(cp, &tmp, 0);
734 if (*tmp)
735 bb_show_usage();
736 stopIt=TRUE;
737 break;
738 }
739 case 'l':
740 if (--argc == 0) {
741 goto goodbye;
742 }
743 listfile = *(++argv);
744 break;
745 case 'n':
746 {
747 char *cp=NULL;
748
749 if (*(*argv+1) != 0) {
750 cp = ++(*argv);
751 } else {
752 if (--argc == 0) {
753 goto goodbye;
754 }
755 cp = *(++argv);
756 }
757 i = strtoul(cp, &tmp, 0);
758 if (*tmp)
759 bb_show_usage();
760 if (i == 14)
761 magic = MINIX_SUPER_MAGIC;
762 else if (i == 30)
763 magic = MINIX_SUPER_MAGIC2;
764 else
765 bb_show_usage();
766 namelen = i;
767 dirsize = i + 2;
768 stopIt=TRUE;
769 break;
770 }
771 case 'v':
772#ifdef CONFIG_FEATURE_MINIX2
773 version2 = 1;
774#else
775 bb_error_msg("%s: not compiled with minix v2 support",
776 device_name);
777 exit(-1);
778#endif
779 break;
780 case '-':
781 case 'h':
782 default:
783goodbye:
784 bb_show_usage();
785 }
786 }
787 } else {
788 if (device_name == NULL)
789 device_name = *argv;
790 else if (BLOCKS == 0)
791 BLOCKS = strtol(*argv, &tmp, 0);
792 else {
793 goto goodbye;
794 }
795 }
796 argv++;
797 }
798
799 if (device_name && !BLOCKS)
800 BLOCKS = get_size(device_name) / 1024;
801 if (!device_name || BLOCKS < 10) {
802 bb_show_usage();
803 }
804#ifdef CONFIG_FEATURE_MINIX2
805 if (version2) {
806 if (namelen == 14)
807 magic = MINIX2_SUPER_MAGIC;
808 else
809 magic = MINIX2_SUPER_MAGIC2;
810 } else
811#endif
812 if (BLOCKS > 65535)
813 BLOCKS = 65535;
814 check_mount(); /* is it already mounted? */
815 tmp = root_block;
816 *(short *) tmp = 1;
817 strcpy(tmp + 2, ".");
818 tmp += dirsize;
819 *(short *) tmp = 1;
820 strcpy(tmp + 2, "..");
821 tmp += dirsize;
822 *(short *) tmp = 2;
823 strcpy(tmp + 2, ".badblocks");
824 DEV = open(device_name, O_RDWR);
825 if (DEV < 0)
826 bb_error_msg_and_die("unable to open %s", device_name);
827 if (fstat(DEV, &statbuf) < 0)
828 bb_error_msg_and_die("unable to stat %s", device_name);
829 if (!S_ISBLK(statbuf.st_mode))
830 check = 0;
831 else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
832 bb_error_msg_and_die("will not try to make filesystem on '%s'", device_name);
833 setup_tables();
834 if (check)
835 check_blocks();
836 else if (listfile)
837 get_list_blocks(listfile);
838#ifdef CONFIG_FEATURE_MINIX2
839 if (version2) {
840 make_root_inode2();
841 make_bad_inode2();
842 } else
843#endif
844 {
845 make_root_inode();
846 make_bad_inode();
847 }
848 mark_good_blocks();
849 write_tables();
850 return( 0);
851
852}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-15 15:53:00 +0000