source: branches/3.2/mindi-busybox/util-linux/mkfs_minix.c @ 3232

Last change on this file since 3232 was 3232, checked in by Bruno Cornec, 7 years ago
  • Update mindi-busybox to 1.21.1
File size: 18.9 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
199
200static long valid_offset(int fd, int offset)
201{
202    char ch;
203
204    if (lseek(fd, offset, SEEK_SET) < 0)
205        return 0;
206    if (read(fd, &ch, 1) < 1)
207        return 0;
208    return 1;
209}
210
211static int count_blocks(int fd)
212{
213    int high, low;
214
215    low = 0;
216    for (high = 1; valid_offset(fd, high); high *= 2)
217        low = high;
218
219    while (low < high - 1) {
220        const int mid = (low + high) / 2;
221
222        if (valid_offset(fd, mid))
223            low = mid;
224        else
225            high = mid;
226    }
227    valid_offset(fd, 0);
228    return (low + 1);
229}
230
231static int get_size(const char *file)
232{
233    int fd;
234    long size;
235
236    fd = xopen(file, O_RDWR);
237    if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
238        close(fd);
239        return (size * 512);
240    }
241
242    size = count_blocks(fd);
243    close(fd);
244    return size;
245}
246
247static void write_tables(void)
248{
249    /* Mark the superblock valid. */
250    SB.s_state |= MINIX_VALID_FS;
251    SB.s_state &= ~MINIX_ERROR_FS;
252
253    msg_eol = "seek to 0 failed";
254    xlseek(dev_fd, 0, SEEK_SET);
255
256    msg_eol = "can't clear boot sector";
257    xwrite(dev_fd, G.boot_block_buffer, 512);
258
259    msg_eol = "seek to BLOCK_SIZE failed";
260    xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
261
262    msg_eol = "can't write superblock";
263    xwrite(dev_fd, G.superblock_buffer, BLOCK_SIZE);
264
265    msg_eol = "can't write inode map";
266    xwrite(dev_fd, G.inode_map, SB_IMAPS * BLOCK_SIZE);
267
268    msg_eol = "can't write zone map";
269    xwrite(dev_fd, G.zone_map, SB_ZMAPS * BLOCK_SIZE);
270
271    msg_eol = "can't write inodes";
272    xwrite(dev_fd, G.inode_buffer, INODE_BUFFER_SIZE);
273
274    msg_eol = "\n";
275}
276
277static void write_block(int blk, char *buffer)
278{
279    xlseek(dev_fd, blk * BLOCK_SIZE, SEEK_SET);
280    xwrite(dev_fd, buffer, BLOCK_SIZE);
281}
282
283static int get_free_block(void)
284{
285    int blk;
286
287    if (G.used_good_blocks + 1 >= MAX_GOOD_BLOCKS)
288        bb_error_msg_and_die("too many bad blocks");
289    if (G.used_good_blocks)
290        blk = G.good_blocks_table[G.used_good_blocks - 1] + 1;
291    else
292        blk = SB_FIRSTZONE;
293    while (blk < SB_ZONES && zone_in_use(blk))
294        blk++;
295    if (blk >= SB_ZONES)
296        bb_error_msg_and_die("not enough good blocks");
297    G.good_blocks_table[G.used_good_blocks] = blk;
298    G.used_good_blocks++;
299    return blk;
300}
301
302static void mark_good_blocks(void)
303{
304    int blk;
305
306    for (blk = 0; blk < G.used_good_blocks; blk++)
307        mark_zone(G.good_blocks_table[blk]);
308}
309
310static int next(int zone)
311{
312    if (!zone)
313        zone = SB_FIRSTZONE - 1;
314    while (++zone < SB_ZONES)
315        if (zone_in_use(zone))
316            return zone;
317    return 0;
318}
319
320static void make_bad_inode(void)
321{
322    struct minix1_inode *inode = &INODE_BUF1[MINIX_BAD_INO];
323    int i, j, zone;
324    int ind = 0, dind = 0;
325    /* moved to globals to reduce stack usage
326    unsigned short ind_block[BLOCK_SIZE >> 1];
327    unsigned short dind_block[BLOCK_SIZE >> 1];
328    */
329#define ind_block (G.ind_block1)
330#define dind_block (G.dind_block1)
331
332#define NEXT_BAD (zone = next(zone))
333
334    if (!G.badblocks)
335        return;
336    mark_inode(MINIX_BAD_INO);
337    inode->i_nlinks = 1;
338    /* BTW, setting this makes all images different */
339    /* it's harder to check for bugs then - diff isn't helpful :(... */
340    inode->i_time = CUR_TIME;
341    inode->i_mode = S_IFREG + 0000;
342    inode->i_size = G.badblocks * BLOCK_SIZE;
343    zone = next(0);
344    for (i = 0; i < 7; i++) {
345        inode->i_zone[i] = zone;
346        if (!NEXT_BAD)
347            goto end_bad;
348    }
349    inode->i_zone[7] = ind = get_free_block();
350    memset(ind_block, 0, BLOCK_SIZE);
351    for (i = 0; i < 512; i++) {
352        ind_block[i] = zone;
353        if (!NEXT_BAD)
354            goto end_bad;
355    }
356    inode->i_zone[8] = dind = get_free_block();
357    memset(dind_block, 0, BLOCK_SIZE);
358    for (i = 0; i < 512; i++) {
359        write_block(ind, (char *) ind_block);
360        dind_block[i] = ind = get_free_block();
361        memset(ind_block, 0, BLOCK_SIZE);
362        for (j = 0; j < 512; j++) {
363            ind_block[j] = zone;
364            if (!NEXT_BAD)
365                goto end_bad;
366        }
367    }
368    bb_error_msg_and_die("too many bad blocks");
369 end_bad:
370    if (ind)
371        write_block(ind, (char *) ind_block);
372    if (dind)
373        write_block(dind, (char *) dind_block);
374#undef ind_block
375#undef dind_block
376}
377
378#if ENABLE_FEATURE_MINIX2
379static void make_bad_inode2(void)
380{
381    struct minix2_inode *inode = &INODE_BUF2[MINIX_BAD_INO];
382    int i, j, zone;
383    int ind = 0, dind = 0;
384    /* moved to globals to reduce stack usage
385    unsigned long ind_block[BLOCK_SIZE >> 2];
386    unsigned long dind_block[BLOCK_SIZE >> 2];
387    */
388#define ind_block (G.ind_block2)
389#define dind_block (G.dind_block2)
390
391    if (!G.badblocks)
392        return;
393    mark_inode(MINIX_BAD_INO);
394    inode->i_nlinks = 1;
395    inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
396    inode->i_mode = S_IFREG + 0000;
397    inode->i_size = G.badblocks * BLOCK_SIZE;
398    zone = next(0);
399    for (i = 0; i < 7; i++) {
400        inode->i_zone[i] = zone;
401        if (!NEXT_BAD)
402            goto end_bad;
403    }
404    inode->i_zone[7] = ind = get_free_block();
405    memset(ind_block, 0, BLOCK_SIZE);
406    for (i = 0; i < 256; i++) {
407        ind_block[i] = zone;
408        if (!NEXT_BAD)
409            goto end_bad;
410    }
411    inode->i_zone[8] = dind = get_free_block();
412    memset(dind_block, 0, BLOCK_SIZE);
413    for (i = 0; i < 256; i++) {
414        write_block(ind, (char *) ind_block);
415        dind_block[i] = ind = get_free_block();
416        memset(ind_block, 0, BLOCK_SIZE);
417        for (j = 0; j < 256; j++) {
418            ind_block[j] = zone;
419            if (!NEXT_BAD)
420                goto end_bad;
421        }
422    }
423    /* Could make triple indirect block here */
424    bb_error_msg_and_die("too many bad blocks");
425 end_bad:
426    if (ind)
427        write_block(ind, (char *) ind_block);
428    if (dind)
429        write_block(dind, (char *) dind_block);
430#undef ind_block
431#undef dind_block
432}
433#else
434void make_bad_inode2(void);
435#endif
436
437static void make_root_inode(void)
438{
439    struct minix1_inode *inode = &INODE_BUF1[MINIX_ROOT_INO];
440
441    mark_inode(MINIX_ROOT_INO);
442    inode->i_zone[0] = get_free_block();
443    inode->i_nlinks = 2;
444    inode->i_time = CUR_TIME;
445    if (G.badblocks)
446        inode->i_size = 3 * G.dirsize;
447    else {
448        G.root_block[2 * G.dirsize] = '\0';
449        G.root_block[2 * G.dirsize + 1] = '\0';
450        inode->i_size = 2 * G.dirsize;
451    }
452    inode->i_mode = S_IFDIR + 0755;
453    inode->i_uid = GETUID;
454    if (inode->i_uid)
455        inode->i_gid = GETGID;
456    write_block(inode->i_zone[0], G.root_block);
457}
458
459#if ENABLE_FEATURE_MINIX2
460static void make_root_inode2(void)
461{
462    struct minix2_inode *inode = &INODE_BUF2[MINIX_ROOT_INO];
463
464    mark_inode(MINIX_ROOT_INO);
465    inode->i_zone[0] = get_free_block();
466    inode->i_nlinks = 2;
467    inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
468    if (G.badblocks)
469        inode->i_size = 3 * G.dirsize;
470    else {
471        G.root_block[2 * G.dirsize] = '\0';
472        G.root_block[2 * G.dirsize + 1] = '\0';
473        inode->i_size = 2 * G.dirsize;
474    }
475    inode->i_mode = S_IFDIR + 0755;
476    inode->i_uid = GETUID;
477    if (inode->i_uid)
478        inode->i_gid = GETGID;
479    write_block(inode->i_zone[0], G.root_block);
480}
481#else
482void make_root_inode2(void);
483#endif
484
485/*
486 * Perform a test of a block; return the number of
487 * blocks readable.
488 */
489static size_t do_check(char *buffer, size_t try, unsigned current_block)
490{
491    ssize_t got;
492
493    /* Seek to the correct loc. */
494    msg_eol = "seek failed during testing of blocks";
495    xlseek(dev_fd, current_block * BLOCK_SIZE, SEEK_SET);
496    msg_eol = "\n";
497
498    /* Try the read */
499    got = read(dev_fd, buffer, try * BLOCK_SIZE);
500    if (got < 0)
501        got = 0;
502    try = ((size_t)got) / BLOCK_SIZE;
503
504    if (got & (BLOCK_SIZE - 1))
505        fprintf(stderr, "Short read at block %u\n", (unsigned)(current_block + try));
506    return try;
507}
508
509static void alarm_intr(int alnum UNUSED_PARAM)
510{
511    if (G.currently_testing >= SB_ZONES)
512        return;
513    signal(SIGALRM, alarm_intr);
514    alarm(5);
515    if (!G.currently_testing)
516        return;
517    printf("%d ...", G.currently_testing);
518    fflush_all();
519}
520
521static void check_blocks(void)
522{
523    size_t try, got;
524
525    G.currently_testing = 0;
526    signal(SIGALRM, alarm_intr);
527    alarm(5);
528    while (G.currently_testing < SB_ZONES) {
529        msg_eol = "seek failed in check_blocks";
530        xlseek(dev_fd, G.currently_testing * BLOCK_SIZE, SEEK_SET);
531        msg_eol = "\n";
532        try = TEST_BUFFER_BLOCKS;
533        if (G.currently_testing + try > SB_ZONES)
534            try = SB_ZONES - G.currently_testing;
535        got = do_check(G.check_blocks_buffer, try, G.currently_testing);
536        G.currently_testing += got;
537        if (got == try)
538            continue;
539        if (G.currently_testing < SB_FIRSTZONE)
540            bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
541        mark_zone(G.currently_testing);
542        G.badblocks++;
543        G.currently_testing++;
544    }
545    alarm(0);
546    printf("%d bad block(s)\n", G.badblocks);
547}
548
549static void get_list_blocks(char *filename)
550{
551    FILE *listfile;
552    unsigned long blockno;
553
554    listfile = xfopen_for_read(filename);
555    while (!feof(listfile)) {
556        fscanf(listfile, "%ld\n", &blockno);
557        mark_zone(blockno);
558        G.badblocks++;
559    }
560    printf("%d bad block(s)\n", G.badblocks);
561}
562
563static void setup_tables(void)
564{
565    unsigned long inodes;
566    unsigned norm_firstzone;
567    unsigned sb_zmaps;
568    unsigned i;
569
570    /* memset(G.superblock_buffer, 0, BLOCK_SIZE); */
571    /* memset(G.boot_block_buffer, 0, 512); */
572    SB_MAGIC = G.magic;
573    SB_ZONE_SIZE = 0;
574    SB_MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
575    if (version2)
576        SB.s_zones = G.total_blocks;
577    else
578        SB.s_nzones = G.total_blocks;
579
580    /* some magic nrs: 1 inode / 3 blocks */
581    if (G.req_nr_inodes == 0)
582        inodes = G.total_blocks / 3;
583    else
584        inodes = G.req_nr_inodes;
585    /* Round up inode count to fill block size */
586    if (version2)
587        inodes = (inodes + MINIX2_INODES_PER_BLOCK - 1) &
588                         ~(MINIX2_INODES_PER_BLOCK - 1);
589    else
590        inodes = (inodes + MINIX1_INODES_PER_BLOCK - 1) &
591                         ~(MINIX1_INODES_PER_BLOCK - 1);
592    if (inodes > 65535)
593        inodes = 65535;
594    SB_INODES = inodes;
595    SB_IMAPS = div_roundup(SB_INODES + 1, BITS_PER_BLOCK);
596
597    /* Real bad hack but overwise mkfs.minix can be thrown
598     * in infinite loop...
599     * try:
600     * dd if=/dev/zero of=test.fs count=10 bs=1024
601     * mkfs.minix -i 200 test.fs
602     */
603    /* This code is not insane: NORM_FIRSTZONE is not a constant,
604     * it is calculated from SB_INODES, SB_IMAPS and SB_ZMAPS */
605    i = 999;
606    SB_ZMAPS = 0;
607    do {
608        norm_firstzone = NORM_FIRSTZONE;
609        sb_zmaps = div_roundup(G.total_blocks - norm_firstzone + 1, BITS_PER_BLOCK);
610        if (SB_ZMAPS == sb_zmaps) goto got_it;
611        SB_ZMAPS = sb_zmaps;
612        /* new SB_ZMAPS, need to recalc NORM_FIRSTZONE */
613    } while (--i);
614    bb_error_msg_and_die("incompatible size/inode count, try different -i N");
615 got_it:
616
617    SB_FIRSTZONE = norm_firstzone;
618    G.inode_map = xmalloc(SB_IMAPS * BLOCK_SIZE);
619    G.zone_map = xmalloc(SB_ZMAPS * BLOCK_SIZE);
620    memset(G.inode_map, 0xff, SB_IMAPS * BLOCK_SIZE);
621    memset(G.zone_map, 0xff, SB_ZMAPS * BLOCK_SIZE);
622    for (i = SB_FIRSTZONE; i < SB_ZONES; i++)
623        unmark_zone(i);
624    for (i = MINIX_ROOT_INO; i <= SB_INODES; i++)
625        unmark_inode(i);
626    G.inode_buffer = xzalloc(INODE_BUFFER_SIZE);
627    printf("%ld inodes\n", (long)SB_INODES);
628    printf("%ld blocks\n", (long)SB_ZONES);
629    printf("Firstdatazone=%ld (%ld)\n", (long)SB_FIRSTZONE, (long)norm_firstzone);
630    printf("Zonesize=%d\n", BLOCK_SIZE << SB_ZONE_SIZE);
631    printf("Maxsize=%ld\n", (long)SB_MAXSIZE);
632}
633
634int mkfs_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
635int mkfs_minix_main(int argc UNUSED_PARAM, char **argv)
636{
637    unsigned opt;
638    char *tmp;
639    struct stat statbuf;
640    char *str_i;
641    char *listfile = NULL;
642
643    INIT_G();
644/* default (changed to 30, per Linus's suggestion, Sun Nov 21 08:05:07 1993) */
645    G.namelen = 30;
646    G.dirsize = 32;
647    G.magic = MINIX1_SUPER_MAGIC2;
648
649    if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE)
650        bb_error_msg_and_die("bad inode size");
651#if ENABLE_FEATURE_MINIX2
652    if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
653        bb_error_msg_and_die("bad inode size");
654#endif
655
656    opt_complementary = "n+"; /* -n N */
657    opt = getopt32(argv, "ci:l:n:v", &str_i, &listfile, &G.namelen);
658    argv += optind;
659    //if (opt & 1) -c
660    if (opt & 2) G.req_nr_inodes = xatoul(str_i); // -i
661    //if (opt & 4) -l
662    if (opt & 8) { // -n
663        if (G.namelen == 14) G.magic = MINIX1_SUPER_MAGIC;
664        else if (G.namelen == 30) G.magic = MINIX1_SUPER_MAGIC2;
665        else bb_show_usage();
666        G.dirsize = G.namelen + 2;
667    }
668    if (opt & 0x10) { // -v
669#if ENABLE_FEATURE_MINIX2
670        version2 = 1;
671#else
672        bb_error_msg_and_die("not compiled with minix v2 support");
673#endif
674    }
675
676    G.device_name = *argv++;
677    if (!G.device_name)
678        bb_show_usage();
679    if (*argv)
680        G.total_blocks = xatou32(*argv);
681    else
682        G.total_blocks = get_size(G.device_name) / 1024;
683
684    if (G.total_blocks < 10)
685        bb_error_msg_and_die("must have at least 10 blocks");
686
687    if (version2) {
688        G.magic = MINIX2_SUPER_MAGIC2;
689        if (G.namelen == 14)
690            G.magic = MINIX2_SUPER_MAGIC;
691    } else if (G.total_blocks > 65535)
692        G.total_blocks = 65535;
693
694    /* Check if it is mounted */
695    if (find_mount_point(G.device_name, 0))
696        bb_error_msg_and_die("can't format mounted filesystem");
697
698    xmove_fd(xopen(G.device_name, O_RDWR), dev_fd);
699    xfstat(dev_fd, &statbuf, G.device_name);
700    if (!S_ISBLK(statbuf.st_mode))
701        opt &= ~1; // clear -c (check)
702
703/* I don't know why someone has special code to prevent mkfs.minix
704 * on IDE devices. Why IDE but not SCSI, etc?... */
705#if 0
706    else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
707        /* what is this? */
708        bb_error_msg_and_die("will not try "
709            "to make filesystem on '%s'", G.device_name);
710#endif
711
712    tmp = G.root_block;
713    *(short *) tmp = 1;
714    strcpy(tmp + 2, ".");
715    tmp += G.dirsize;
716    *(short *) tmp = 1;
717    strcpy(tmp + 2, "..");
718    tmp += G.dirsize;
719    *(short *) tmp = 2;
720    strcpy(tmp + 2, ".badblocks");
721
722    setup_tables();
723
724    if (opt & 1) // -c ?
725        check_blocks();
726    else if (listfile)
727        get_list_blocks(listfile);
728
729    if (version2) {
730        make_root_inode2();
731        make_bad_inode2();
732    } else {
733        make_root_inode();
734        make_bad_inode();
735    }
736
737    mark_good_blocks();
738    write_tables();
739    return 0;
740}
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