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text data bss dec hexfilename 838650 8009 0 846659 ceb43busybox_old 838519 8009 0 846528 ceac0busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
732 lines
18 KiB
C
732 lines
18 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* mkfs.c - make a linux (minix) file-system.
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*
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* (C) 1991 Linus Torvalds.
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*
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* Licensed under GPLv2, see file LICENSE in this tarball for details.
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*/
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/*
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* DD.MM.YY
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*
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* 24.11.91 - Time began. Used the fsck sources to get started.
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*
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* 25.11.91 - Corrected some bugs. Added support for ".badblocks"
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* The algorithm for ".badblocks" is a bit weird, but
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* it should work. Oh, well.
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*
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* 25.01.92 - Added the -l option for getting the list of bad blocks
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* out of a named file. (Dave Rivers, rivers@ponds.uucp)
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*
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* 28.02.92 - Added %-information when using -c.
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*
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* 28.02.93 - Added support for other namelengths than the original
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* 14 characters so that I can test the new kernel routines..
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*
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* 09.10.93 - Make exit status conform to that required by fsutil
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* (Rik Faith, faith@cs.unc.edu)
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*
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* 31.10.93 - Added inode request feature, for backup floppies: use
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* 32 inodes, for a news partition use more.
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* (Scott Heavner, sdh@po.cwru.edu)
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*
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* 03.01.94 - Added support for file system valid flag.
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* (Dr. Wettstein, greg%wind.uucp@plains.nodak.edu)
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*
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* 30.10.94 - added support for v2 filesystem
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* (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
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*
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* 09.11.94 - Added test to prevent overwrite of mounted fs adapted
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* from Theodore Ts'o's (tytso@athena.mit.edu) mke2fs
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* program. (Daniel Quinlan, quinlan@yggdrasil.com)
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*
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* 03.20.95 - Clear first 512 bytes of filesystem to make certain that
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* the filesystem is not misidentified as a MS-DOS FAT filesystem.
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* (Daniel Quinlan, quinlan@yggdrasil.com)
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*
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* 02.07.96 - Added small patch from Russell King to make the program a
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* good deal more portable (janl@math.uio.no)
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*
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* Usage: mkfs [-c | -l filename ] [-v] [-nXX] [-iXX] device [size-in-blocks]
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*
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* -c for readability checking (SLOW!)
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* -l for getting a list of bad blocks from a file.
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* -n for namelength (currently the kernel only uses 14 or 30)
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* -i for number of inodes
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* -v for v2 filesystem
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*
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* The device may be a block device or a image of one, but this isn't
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* enforced (but it's not much fun on a character device :-).
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*
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* Modified for BusyBox by Erik Andersen <andersen@debian.org> --
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* removed getopt based parser and added a hand rolled one.
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*/
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#include "libbb.h"
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#include <mntent.h>
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#include "minix.h"
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/* Store the very same times/uids/gids for image consistency */
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#if 1
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# define CUR_TIME 0
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# define GETUID 0
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# define GETGID 0
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#else
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/* Was using this. Is it useful? NB: this will break testsuite */
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# define CUR_TIME time(NULL)
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# define GETUID getuid()
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# define GETGID getgid()
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#endif
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enum {
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MAX_GOOD_BLOCKS = 512,
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TEST_BUFFER_BLOCKS = 16,
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};
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#if !ENABLE_FEATURE_MINIX2
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enum { version2 = 0 };
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#endif
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enum { dev_fd = 3 };
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struct globals {
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#if ENABLE_FEATURE_MINIX2
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smallint version2;
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#define version2 G.version2
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#endif
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char *device_name;
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uint32_t total_blocks;
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int badblocks;
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int namelen;
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int dirsize;
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int magic;
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char *inode_buffer;
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char *inode_map;
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char *zone_map;
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int used_good_blocks;
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unsigned long req_nr_inodes;
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unsigned currently_testing;
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char root_block[BLOCK_SIZE];
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char superblock_buffer[BLOCK_SIZE];
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char boot_block_buffer[512];
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unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
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/* check_blocks(): buffer[] was the biggest static in entire bbox */
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char check_blocks_buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS];
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unsigned short ind_block1[BLOCK_SIZE >> 1];
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unsigned short dind_block1[BLOCK_SIZE >> 1];
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unsigned long ind_block2[BLOCK_SIZE >> 2];
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unsigned long dind_block2[BLOCK_SIZE >> 2];
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};
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#define G (*ptr_to_globals)
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#define INIT_G() do { \
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SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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} while (0)
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static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
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{
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return (size + n-1) / n;
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}
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#define INODE_BUF1 (((struct minix1_inode*)G.inode_buffer) - 1)
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#define INODE_BUF2 (((struct minix2_inode*)G.inode_buffer) - 1)
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#define SB (*(struct minix_superblock*)G.superblock_buffer)
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#define SB_INODES (SB.s_ninodes)
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#define SB_IMAPS (SB.s_imap_blocks)
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#define SB_ZMAPS (SB.s_zmap_blocks)
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#define SB_FIRSTZONE (SB.s_firstdatazone)
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#define SB_ZONE_SIZE (SB.s_log_zone_size)
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#define SB_MAXSIZE (SB.s_max_size)
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#define SB_MAGIC (SB.s_magic)
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#if !ENABLE_FEATURE_MINIX2
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# define SB_ZONES (SB.s_nzones)
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# define INODE_BLOCKS div_roundup(SB_INODES, MINIX1_INODES_PER_BLOCK)
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#else
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# define SB_ZONES (version2 ? SB.s_zones : SB.s_nzones)
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# define INODE_BLOCKS div_roundup(SB_INODES, \
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(version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
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#endif
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#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
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#define NORM_FIRSTZONE (2 + SB_IMAPS + SB_ZMAPS + INODE_BLOCKS)
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/* Before you ask "where they come from?": */
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/* setbit/clrbit are supplied by sys/param.h */
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static int minix_bit(const char* a, unsigned i)
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{
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return a[i >> 3] & (1<<(i & 7));
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}
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static void minix_setbit(char *a, unsigned i)
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{
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setbit(a, i);
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}
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static void minix_clrbit(char *a, unsigned i)
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{
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clrbit(a, i);
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}
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/* Note: do not assume 0/1, it is 0/nonzero */
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#define zone_in_use(x) minix_bit(G.zone_map,(x)-SB_FIRSTZONE+1)
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/*#define inode_in_use(x) minix_bit(G.inode_map,(x))*/
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#define mark_inode(x) minix_setbit(G.inode_map,(x))
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#define unmark_inode(x) minix_clrbit(G.inode_map,(x))
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#define mark_zone(x) minix_setbit(G.zone_map,(x)-SB_FIRSTZONE+1)
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#define unmark_zone(x) minix_clrbit(G.zone_map,(x)-SB_FIRSTZONE+1)
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#ifndef BLKGETSIZE
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# define BLKGETSIZE _IO(0x12,96) /* return device size */
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#endif
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static long valid_offset(int fd, int offset)
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{
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char ch;
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if (lseek(fd, offset, SEEK_SET) < 0)
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return 0;
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if (read(fd, &ch, 1) < 1)
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return 0;
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return 1;
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}
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static int count_blocks(int fd)
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{
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int high, low;
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low = 0;
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for (high = 1; valid_offset(fd, high); high *= 2)
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low = high;
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while (low < high - 1) {
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const int mid = (low + high) / 2;
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if (valid_offset(fd, mid))
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low = mid;
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else
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high = mid;
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}
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valid_offset(fd, 0);
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return (low + 1);
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}
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static int get_size(const char *file)
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{
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int fd;
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long size;
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fd = xopen(file, O_RDWR);
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if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
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close(fd);
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return (size * 512);
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}
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size = count_blocks(fd);
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close(fd);
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return size;
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}
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static void write_tables(void)
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{
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/* Mark the superblock valid. */
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SB.s_state |= MINIX_VALID_FS;
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SB.s_state &= ~MINIX_ERROR_FS;
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msg_eol = "seek to 0 failed";
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xlseek(dev_fd, 0, SEEK_SET);
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msg_eol = "can't clear boot sector";
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xwrite(dev_fd, G.boot_block_buffer, 512);
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msg_eol = "seek to BLOCK_SIZE failed";
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xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
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msg_eol = "can't write superblock";
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xwrite(dev_fd, G.superblock_buffer, BLOCK_SIZE);
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msg_eol = "can't write inode map";
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xwrite(dev_fd, G.inode_map, SB_IMAPS * BLOCK_SIZE);
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msg_eol = "can't write zone map";
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xwrite(dev_fd, G.zone_map, SB_ZMAPS * BLOCK_SIZE);
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msg_eol = "can't write inodes";
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xwrite(dev_fd, G.inode_buffer, INODE_BUFFER_SIZE);
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msg_eol = "\n";
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}
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static void write_block(int blk, char *buffer)
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{
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xlseek(dev_fd, blk * BLOCK_SIZE, SEEK_SET);
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xwrite(dev_fd, buffer, BLOCK_SIZE);
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}
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static int get_free_block(void)
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{
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int blk;
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if (G.used_good_blocks + 1 >= MAX_GOOD_BLOCKS)
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bb_error_msg_and_die("too many bad blocks");
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if (G.used_good_blocks)
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blk = G.good_blocks_table[G.used_good_blocks - 1] + 1;
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else
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blk = SB_FIRSTZONE;
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while (blk < SB_ZONES && zone_in_use(blk))
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blk++;
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if (blk >= SB_ZONES)
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bb_error_msg_and_die("not enough good blocks");
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G.good_blocks_table[G.used_good_blocks] = blk;
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G.used_good_blocks++;
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return blk;
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}
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static void mark_good_blocks(void)
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{
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int blk;
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for (blk = 0; blk < G.used_good_blocks; blk++)
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mark_zone(G.good_blocks_table[blk]);
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}
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static int next(int zone)
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{
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if (!zone)
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zone = SB_FIRSTZONE - 1;
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while (++zone < SB_ZONES)
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if (zone_in_use(zone))
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return zone;
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return 0;
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}
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static void make_bad_inode(void)
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{
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struct minix1_inode *inode = &INODE_BUF1[MINIX_BAD_INO];
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int i, j, zone;
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int ind = 0, dind = 0;
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/* moved to globals to reduce stack usage
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unsigned short ind_block[BLOCK_SIZE >> 1];
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unsigned short dind_block[BLOCK_SIZE >> 1];
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*/
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#define ind_block (G.ind_block1)
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#define dind_block (G.dind_block1)
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#define NEXT_BAD (zone = next(zone))
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if (!G.badblocks)
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return;
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mark_inode(MINIX_BAD_INO);
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inode->i_nlinks = 1;
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/* BTW, setting this makes all images different */
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/* it's harder to check for bugs then - diff isn't helpful :(... */
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inode->i_time = CUR_TIME;
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inode->i_mode = S_IFREG + 0000;
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inode->i_size = G.badblocks * BLOCK_SIZE;
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zone = next(0);
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for (i = 0; i < 7; i++) {
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inode->i_zone[i] = zone;
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if (!NEXT_BAD)
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goto end_bad;
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}
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inode->i_zone[7] = ind = get_free_block();
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memset(ind_block, 0, BLOCK_SIZE);
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for (i = 0; i < 512; i++) {
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ind_block[i] = zone;
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if (!NEXT_BAD)
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goto end_bad;
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}
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inode->i_zone[8] = dind = get_free_block();
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memset(dind_block, 0, BLOCK_SIZE);
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for (i = 0; i < 512; i++) {
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write_block(ind, (char *) ind_block);
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dind_block[i] = ind = get_free_block();
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memset(ind_block, 0, BLOCK_SIZE);
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for (j = 0; j < 512; j++) {
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ind_block[j] = zone;
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if (!NEXT_BAD)
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goto end_bad;
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}
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}
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bb_error_msg_and_die("too many bad blocks");
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end_bad:
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if (ind)
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write_block(ind, (char *) ind_block);
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if (dind)
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write_block(dind, (char *) dind_block);
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#undef ind_block
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#undef dind_block
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}
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#if ENABLE_FEATURE_MINIX2
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static void make_bad_inode2(void)
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{
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struct minix2_inode *inode = &INODE_BUF2[MINIX_BAD_INO];
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int i, j, zone;
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int ind = 0, dind = 0;
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/* moved to globals to reduce stack usage
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unsigned long ind_block[BLOCK_SIZE >> 2];
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unsigned long dind_block[BLOCK_SIZE >> 2];
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*/
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#define ind_block (G.ind_block2)
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#define dind_block (G.dind_block2)
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if (!G.badblocks)
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return;
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mark_inode(MINIX_BAD_INO);
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inode->i_nlinks = 1;
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inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
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inode->i_mode = S_IFREG + 0000;
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inode->i_size = G.badblocks * BLOCK_SIZE;
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zone = next(0);
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for (i = 0; i < 7; i++) {
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inode->i_zone[i] = zone;
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if (!NEXT_BAD)
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goto end_bad;
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}
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inode->i_zone[7] = ind = get_free_block();
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memset(ind_block, 0, BLOCK_SIZE);
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for (i = 0; i < 256; i++) {
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ind_block[i] = zone;
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if (!NEXT_BAD)
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goto end_bad;
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}
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inode->i_zone[8] = dind = get_free_block();
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memset(dind_block, 0, BLOCK_SIZE);
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for (i = 0; i < 256; i++) {
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write_block(ind, (char *) ind_block);
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dind_block[i] = ind = get_free_block();
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memset(ind_block, 0, BLOCK_SIZE);
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for (j = 0; j < 256; j++) {
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ind_block[j] = zone;
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if (!NEXT_BAD)
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goto end_bad;
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}
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}
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/* Could make triple indirect block here */
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bb_error_msg_and_die("too many bad blocks");
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end_bad:
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if (ind)
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write_block(ind, (char *) ind_block);
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if (dind)
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write_block(dind, (char *) dind_block);
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#undef ind_block
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#undef dind_block
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}
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#else
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void make_bad_inode2(void);
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#endif
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static void make_root_inode(void)
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{
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struct minix1_inode *inode = &INODE_BUF1[MINIX_ROOT_INO];
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mark_inode(MINIX_ROOT_INO);
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inode->i_zone[0] = get_free_block();
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inode->i_nlinks = 2;
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inode->i_time = CUR_TIME;
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if (G.badblocks)
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inode->i_size = 3 * G.dirsize;
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else {
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G.root_block[2 * G.dirsize] = '\0';
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G.root_block[2 * G.dirsize + 1] = '\0';
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inode->i_size = 2 * G.dirsize;
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}
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inode->i_mode = S_IFDIR + 0755;
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inode->i_uid = GETUID;
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if (inode->i_uid)
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inode->i_gid = GETGID;
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write_block(inode->i_zone[0], G.root_block);
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}
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#if ENABLE_FEATURE_MINIX2
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static void make_root_inode2(void)
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{
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struct minix2_inode *inode = &INODE_BUF2[MINIX_ROOT_INO];
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mark_inode(MINIX_ROOT_INO);
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inode->i_zone[0] = get_free_block();
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inode->i_nlinks = 2;
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inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
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if (G.badblocks)
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inode->i_size = 3 * G.dirsize;
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else {
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G.root_block[2 * G.dirsize] = '\0';
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G.root_block[2 * G.dirsize + 1] = '\0';
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inode->i_size = 2 * G.dirsize;
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}
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inode->i_mode = S_IFDIR + 0755;
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inode->i_uid = GETUID;
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if (inode->i_uid)
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inode->i_gid = GETGID;
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write_block(inode->i_zone[0], G.root_block);
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}
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#else
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void make_root_inode2(void);
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#endif
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/*
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* Perform a test of a block; return the number of
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* blocks readable.
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*/
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static size_t do_check(char *buffer, size_t try, unsigned current_block)
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{
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ssize_t got;
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/* Seek to the correct loc. */
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msg_eol = "seek failed during testing of blocks";
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xlseek(dev_fd, current_block * BLOCK_SIZE, SEEK_SET);
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msg_eol = "\n";
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/* Try the read */
|
|
got = read(dev_fd, buffer, try * BLOCK_SIZE);
|
|
if (got < 0)
|
|
got = 0;
|
|
try = ((size_t)got) / BLOCK_SIZE;
|
|
|
|
if (got & (BLOCK_SIZE - 1))
|
|
fprintf(stderr, "Short read at block %u\n", (unsigned)(current_block + try));
|
|
return try;
|
|
}
|
|
|
|
static void alarm_intr(int alnum UNUSED_PARAM)
|
|
{
|
|
if (G.currently_testing >= SB_ZONES)
|
|
return;
|
|
signal(SIGALRM, alarm_intr);
|
|
alarm(5);
|
|
if (!G.currently_testing)
|
|
return;
|
|
printf("%d ...", G.currently_testing);
|
|
fflush_all();
|
|
}
|
|
|
|
static void check_blocks(void)
|
|
{
|
|
size_t try, got;
|
|
|
|
G.currently_testing = 0;
|
|
signal(SIGALRM, alarm_intr);
|
|
alarm(5);
|
|
while (G.currently_testing < SB_ZONES) {
|
|
msg_eol = "seek failed in check_blocks";
|
|
xlseek(dev_fd, G.currently_testing * BLOCK_SIZE, SEEK_SET);
|
|
msg_eol = "\n";
|
|
try = TEST_BUFFER_BLOCKS;
|
|
if (G.currently_testing + try > SB_ZONES)
|
|
try = SB_ZONES - G.currently_testing;
|
|
got = do_check(G.check_blocks_buffer, try, G.currently_testing);
|
|
G.currently_testing += got;
|
|
if (got == try)
|
|
continue;
|
|
if (G.currently_testing < SB_FIRSTZONE)
|
|
bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
|
|
mark_zone(G.currently_testing);
|
|
G.badblocks++;
|
|
G.currently_testing++;
|
|
}
|
|
alarm(0);
|
|
printf("%d bad block(s)\n", G.badblocks);
|
|
}
|
|
|
|
static void get_list_blocks(char *filename)
|
|
{
|
|
FILE *listfile;
|
|
unsigned long blockno;
|
|
|
|
listfile = xfopen_for_read(filename);
|
|
while (!feof(listfile)) {
|
|
fscanf(listfile, "%ld\n", &blockno);
|
|
mark_zone(blockno);
|
|
G.badblocks++;
|
|
}
|
|
printf("%d bad block(s)\n", G.badblocks);
|
|
}
|
|
|
|
static void setup_tables(void)
|
|
{
|
|
unsigned long inodes;
|
|
unsigned norm_firstzone;
|
|
unsigned sb_zmaps;
|
|
unsigned i;
|
|
|
|
/* memset(G.superblock_buffer, 0, BLOCK_SIZE); */
|
|
/* memset(G.boot_block_buffer, 0, 512); */
|
|
SB_MAGIC = G.magic;
|
|
SB_ZONE_SIZE = 0;
|
|
SB_MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
|
|
if (version2)
|
|
SB.s_zones = G.total_blocks;
|
|
else
|
|
SB.s_nzones = G.total_blocks;
|
|
|
|
/* some magic nrs: 1 inode / 3 blocks */
|
|
if (G.req_nr_inodes == 0)
|
|
inodes = G.total_blocks / 3;
|
|
else
|
|
inodes = G.req_nr_inodes;
|
|
/* Round up inode count to fill block size */
|
|
if (version2)
|
|
inodes = (inodes + MINIX2_INODES_PER_BLOCK - 1) &
|
|
~(MINIX2_INODES_PER_BLOCK - 1);
|
|
else
|
|
inodes = (inodes + MINIX1_INODES_PER_BLOCK - 1) &
|
|
~(MINIX1_INODES_PER_BLOCK - 1);
|
|
if (inodes > 65535)
|
|
inodes = 65535;
|
|
SB_INODES = inodes;
|
|
SB_IMAPS = div_roundup(SB_INODES + 1, BITS_PER_BLOCK);
|
|
|
|
/* Real bad hack but overwise mkfs.minix can be thrown
|
|
* in infinite loop...
|
|
* try:
|
|
* dd if=/dev/zero of=test.fs count=10 bs=1024
|
|
* mkfs.minix -i 200 test.fs
|
|
*/
|
|
/* This code is not insane: NORM_FIRSTZONE is not a constant,
|
|
* it is calculated from SB_INODES, SB_IMAPS and SB_ZMAPS */
|
|
i = 999;
|
|
SB_ZMAPS = 0;
|
|
do {
|
|
norm_firstzone = NORM_FIRSTZONE;
|
|
sb_zmaps = div_roundup(G.total_blocks - norm_firstzone + 1, BITS_PER_BLOCK);
|
|
if (SB_ZMAPS == sb_zmaps) goto got_it;
|
|
SB_ZMAPS = sb_zmaps;
|
|
/* new SB_ZMAPS, need to recalc NORM_FIRSTZONE */
|
|
} while (--i);
|
|
bb_error_msg_and_die("incompatible size/inode count, try different -i N");
|
|
got_it:
|
|
|
|
SB_FIRSTZONE = norm_firstzone;
|
|
G.inode_map = xmalloc(SB_IMAPS * BLOCK_SIZE);
|
|
G.zone_map = xmalloc(SB_ZMAPS * BLOCK_SIZE);
|
|
memset(G.inode_map, 0xff, SB_IMAPS * BLOCK_SIZE);
|
|
memset(G.zone_map, 0xff, SB_ZMAPS * BLOCK_SIZE);
|
|
for (i = SB_FIRSTZONE; i < SB_ZONES; i++)
|
|
unmark_zone(i);
|
|
for (i = MINIX_ROOT_INO; i <= SB_INODES; i++)
|
|
unmark_inode(i);
|
|
G.inode_buffer = xzalloc(INODE_BUFFER_SIZE);
|
|
printf("%ld inodes\n", (long)SB_INODES);
|
|
printf("%ld blocks\n", (long)SB_ZONES);
|
|
printf("Firstdatazone=%ld (%ld)\n", (long)SB_FIRSTZONE, (long)norm_firstzone);
|
|
printf("Zonesize=%d\n", BLOCK_SIZE << SB_ZONE_SIZE);
|
|
printf("Maxsize=%ld\n", (long)SB_MAXSIZE);
|
|
}
|
|
|
|
int mkfs_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int mkfs_minix_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
unsigned opt;
|
|
char *tmp;
|
|
struct stat statbuf;
|
|
char *str_i;
|
|
char *listfile = NULL;
|
|
|
|
INIT_G();
|
|
/* default (changed to 30, per Linus's suggestion, Sun Nov 21 08:05:07 1993) */
|
|
G.namelen = 30;
|
|
G.dirsize = 32;
|
|
G.magic = MINIX1_SUPER_MAGIC2;
|
|
|
|
if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE)
|
|
bb_error_msg_and_die("bad inode size");
|
|
#if ENABLE_FEATURE_MINIX2
|
|
if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
|
|
bb_error_msg_and_die("bad inode size");
|
|
#endif
|
|
|
|
opt_complementary = "n+"; /* -n N */
|
|
opt = getopt32(argv, "ci:l:n:v", &str_i, &listfile, &G.namelen);
|
|
argv += optind;
|
|
//if (opt & 1) -c
|
|
if (opt & 2) G.req_nr_inodes = xatoul(str_i); // -i
|
|
//if (opt & 4) -l
|
|
if (opt & 8) { // -n
|
|
if (G.namelen == 14) G.magic = MINIX1_SUPER_MAGIC;
|
|
else if (G.namelen == 30) G.magic = MINIX1_SUPER_MAGIC2;
|
|
else bb_show_usage();
|
|
G.dirsize = G.namelen + 2;
|
|
}
|
|
if (opt & 0x10) { // -v
|
|
#if ENABLE_FEATURE_MINIX2
|
|
version2 = 1;
|
|
#else
|
|
bb_error_msg_and_die("not compiled with minix v2 support");
|
|
#endif
|
|
}
|
|
|
|
G.device_name = *argv++;
|
|
if (!G.device_name)
|
|
bb_show_usage();
|
|
if (*argv)
|
|
G.total_blocks = xatou32(*argv);
|
|
else
|
|
G.total_blocks = get_size(G.device_name) / 1024;
|
|
|
|
if (G.total_blocks < 10)
|
|
bb_error_msg_and_die("must have at least 10 blocks");
|
|
|
|
if (version2) {
|
|
G.magic = MINIX2_SUPER_MAGIC2;
|
|
if (G.namelen == 14)
|
|
G.magic = MINIX2_SUPER_MAGIC;
|
|
} else if (G.total_blocks > 65535)
|
|
G.total_blocks = 65535;
|
|
|
|
/* Check if it is mounted */
|
|
if (find_mount_point(G.device_name, 0))
|
|
bb_error_msg_and_die("can't format mounted filesystem");
|
|
|
|
xmove_fd(xopen(G.device_name, O_RDWR), dev_fd);
|
|
if (fstat(dev_fd, &statbuf) < 0)
|
|
bb_error_msg_and_die("can't stat '%s'", G.device_name);
|
|
if (!S_ISBLK(statbuf.st_mode))
|
|
opt &= ~1; // clear -c (check)
|
|
|
|
/* I don't know why someone has special code to prevent mkfs.minix
|
|
* on IDE devices. Why IDE but not SCSI, etc?... */
|
|
#if 0
|
|
else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
|
|
/* what is this? */
|
|
bb_error_msg_and_die("will not try "
|
|
"to make filesystem on '%s'", G.device_name);
|
|
#endif
|
|
|
|
tmp = G.root_block;
|
|
*(short *) tmp = 1;
|
|
strcpy(tmp + 2, ".");
|
|
tmp += G.dirsize;
|
|
*(short *) tmp = 1;
|
|
strcpy(tmp + 2, "..");
|
|
tmp += G.dirsize;
|
|
*(short *) tmp = 2;
|
|
strcpy(tmp + 2, ".badblocks");
|
|
|
|
setup_tables();
|
|
|
|
if (opt & 1) // -c ?
|
|
check_blocks();
|
|
else if (listfile)
|
|
get_list_blocks(listfile);
|
|
|
|
if (version2) {
|
|
make_root_inode2();
|
|
make_bad_inode2();
|
|
} else {
|
|
make_root_inode();
|
|
make_bad_inode();
|
|
}
|
|
|
|
mark_good_blocks();
|
|
write_tables();
|
|
return 0;
|
|
}
|