* 03.01.94 - Added support for file system valid flag.
* (Dr. Wettstein, greg%wind.uucp@plains.nodak.edu)
*
- * 30.10.94 - added support for v2 filesystem
- * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
+ * 30.10.94 - added support for v2 filesystem
+ * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
*
* 09.11.94 - Added test to prevent overwrite of mounted fs adapted
* from Theodore Ts'o's (tytso@athena.mit.edu) mke2fs
#include "busybox.h"
#include <mntent.h>
-#define MINIX_ROOT_INO 1
-#define MINIX_LINK_MAX 250
-#define MINIX2_LINK_MAX 65530
+#define DEBUG 0
-#define MINIX_I_MAP_SLOTS 8
-#define MINIX_Z_MAP_SLOTS 64
-#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
-#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
-#define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
-#define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
-#define MINIX_VALID_FS 0x0001 /* Clean fs. */
-#define MINIX_ERROR_FS 0x0002 /* fs has errors. */
-
-#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
-#define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode)))
-
-#define MINIX_V1 0x0001 /* original minix fs */
-#define MINIX_V2 0x0002 /* minix V2 fs */
-
-#define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version
+/* If debugging, store the very same times/uids/gids for image consistency */
+#if DEBUG
+# define CUR_TIME 0
+# define GETUID 0
+# define GETGID 0
+#else
+# define CUR_TIME time(NULL)
+# define GETUID getuid()
+# define GETGID getgid()
+#endif
/*
* This is the original minix inode layout on disk.
* Note the 8-bit gid and atime and ctime.
*/
-struct minix_inode {
+struct minix1_inode {
uint16_t i_mode;
uint16_t i_uid;
uint32_t i_size;
char name[0];
};
-#define NAME_MAX 255 /* # chars in a file name */
-
-#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
-
-#define MINIX_VALID_FS 0x0001 /* Clean fs. */
-#define MINIX_ERROR_FS 0x0002 /* fs has errors. */
-
-#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
-#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
-
-#ifndef BLKGETSIZE
-#define BLKGETSIZE _IO(0x12,96) /* return device size */
-#endif
-
-
-#ifndef __linux__
-#define volatile
-#endif
-
-#define MINIX_ROOT_INO 1
-#define MINIX_BAD_INO 2
-
-#define TEST_BUFFER_BLOCKS 16
-#define MAX_GOOD_BLOCKS 512
-
-#define UPPER(size,n) (((size)+((n)-1))/(n))
-#define INODE_SIZE (sizeof(struct minix_inode))
+/* Believe it or not, but mount.h has this one */
+#undef BLOCK_SIZE
+enum {
+ BLOCK_SIZE = 1024,
+ BITS_PER_BLOCK = BLOCK_SIZE << 3,
+
+ MINIX_ROOT_INO = 1,
+ MINIX_BAD_INO = 2,
+ MAX_GOOD_BLOCKS = 512,
+
+ MINIX1_SUPER_MAGIC = 0x137F, /* original minix fs */
+ MINIX1_SUPER_MAGIC2 = 0x138F, /* minix fs, 30 char names */
+ MINIX2_SUPER_MAGIC = 0x2468, /* minix V2 fs */
+ MINIX2_SUPER_MAGIC2 = 0x2478, /* minix V2 fs, 30 char names */
+ MINIX_VALID_FS = 0x0001, /* clean fs */
+ MINIX_ERROR_FS = 0x0002, /* fs has errors */
+
+ INODE_SIZE1 = sizeof(struct minix1_inode),
+ INODE_SIZE2 = sizeof(struct minix2_inode),
+ MINIX1_INODES_PER_BLOCK = BLOCK_SIZE / sizeof(struct minix1_inode),
+ MINIX2_INODES_PER_BLOCK = BLOCK_SIZE / sizeof(struct minix2_inode),
+
+ TEST_BUFFER_BLOCKS = 16,
+};
#if ENABLE_FEATURE_MINIX2
-# define INODE_SIZE2 (sizeof(struct minix2_inode))
-# define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
- : MINIX_INODES_PER_BLOCK))
+static int version2;
#else
-# define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
+enum { version2 = 0 };
#endif
-#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
-
-#define BITS_PER_BLOCK (BLOCK_SIZE<<3)
-
static char *device_name;
-static int DEV = -1;
-static uint32_t BLOCKS;
+static int dev_fd = -1;
+static uint32_t total_blocks;
static int badblocks;
/* default (changed to 30, per Linus's suggestion, Sun Nov 21 08:05:07 1993) */
static int namelen = 30;
static int dirsize = 32;
-static int magic = MINIX_SUPER_MAGIC2;
-#if ENABLE_FEATURE_MINIX2
-static int version2;
-#else
-enum { version2 = 0 };
-#endif
+static int magic = MINIX1_SUPER_MAGIC2;
static char root_block[BLOCK_SIZE];
-
-static char *inode_buffer;
-
-#define Inode (((struct minix_inode *) inode_buffer)-1)
-#if ENABLE_FEATURE_MINIX2
-#define Inode2 (((struct minix2_inode *) inode_buffer)-1)
-#endif
static char super_block_buffer[BLOCK_SIZE];
static char boot_block_buffer[512];
-
-#define Super (*(struct minix_super_block *)super_block_buffer)
-
-#define INODES (Super.s_ninodes)
-#if ENABLE_FEATURE_MINIX2
-# define ZONES (version2 ? Super.s_zones : Super.s_nzones)
-#else
-# define ZONES (Super.s_nzones)
-#endif
-
-#define IMAPS (Super.s_imap_blocks)
-#define ZMAPS (Super.s_zmap_blocks)
-#define FIRSTZONE (Super.s_firstdatazone)
-#define ZONESIZE (Super.s_log_zone_size)
-#define MAXSIZE (Super.s_max_size)
-#define MAGIC (Super.s_magic)
-#define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
+static char *inode_buffer;
static char *inode_map;
static char *zone_map;
-static unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
static int used_good_blocks;
+static unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
static unsigned long req_nr_inodes;
-static int bit(char* a, unsigned i)
+extern inline unsigned div_roundup(unsigned size, unsigned n)
+{
+ return (size + n-1) / n;
+}
+
+#define INODE_BUF1 (((struct minix1_inode*)inode_buffer) - 1)
+#define INODE_BUF2 (((struct minix2_inode*)inode_buffer) - 1)
+
+#define SB (*(struct minix_super_block*)super_block_buffer)
+
+#define SB_INODES (SB.s_ninodes)
+#define SB_IMAPS (SB.s_imap_blocks)
+#define SB_ZMAPS (SB.s_zmap_blocks)
+#define SB_FIRSTZONE (SB.s_firstdatazone)
+#define SB_ZONE_SIZE (SB.s_log_zone_size)
+#define SB_MAXSIZE (SB.s_max_size)
+#define SB_MAGIC (SB.s_magic)
+
+#if !ENABLE_FEATURE_MINIX2
+# define SB_ZONES (SB.s_nzones)
+# define INODE_BLOCKS div_roundup(SB_INODES, MINIX1_INODES_PER_BLOCK)
+#else
+# define SB_ZONES (version2 ? SB.s_zones : SB.s_nzones)
+# define INODE_BLOCKS div_roundup(SB_INODES, \
+ version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK)
+#endif
+
+#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
+#define NORM_FIRSTZONE (2 + SB_IMAPS + SB_ZMAPS + INODE_BLOCKS)
+
+static int bit(const char* a, unsigned i)
{
- return (a[i >> 3] & (1<<(i & 7))) != 0;
+ return a[i >> 3] & (1<<(i & 7));
}
-#define inode_in_use(x) (bit(inode_map,(x)))
-#define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
-#define mark_inode(x) (setbit(inode_map,(x)))
-#define unmark_inode(x) (clrbit(inode_map,(x)))
+/* Note: do not assume 0/1, it is 0/nonzero */
+#define inode_in_use(x) bit(inode_map,(x))
+#define zone_in_use(x) bit(zone_map,(x)-SB_FIRSTZONE+1)
+
+#define mark_inode(x) setbit(inode_map,(x))
+#define unmark_inode(x) clrbit(inode_map,(x))
+#define mark_zone(x) setbit(zone_map,(x)-SB_FIRSTZONE+1)
+#define unmark_zone(x) clrbit(zone_map,(x)-SB_FIRSTZONE+1)
+
+#ifndef BLKGETSIZE
+# define BLKGETSIZE _IO(0x12,96) /* return device size */
+#endif
-#define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1))
-#define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1))
static long valid_offset(int fd, int offset)
{
static void write_tables(void)
{
/* Mark the super block valid. */
- Super.s_state |= MINIX_VALID_FS;
- Super.s_state &= ~MINIX_ERROR_FS;
+ SB.s_state |= MINIX_VALID_FS;
+ SB.s_state &= ~MINIX_ERROR_FS;
msg_eol = "seek to 0 failed";
- xlseek(DEV, 0, SEEK_SET);
+ xlseek(dev_fd, 0, SEEK_SET);
msg_eol = "cannot clear boot sector";
- xwrite(DEV, boot_block_buffer, 512);
+ xwrite(dev_fd, boot_block_buffer, 512);
msg_eol = "seek to BLOCK_SIZE failed";
- xlseek(DEV, BLOCK_SIZE, SEEK_SET);
+ xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
msg_eol = "cannot write superblock";
- xwrite(DEV, super_block_buffer, BLOCK_SIZE);
+ xwrite(dev_fd, super_block_buffer, BLOCK_SIZE);
msg_eol = "cannot write inode map";
- xwrite(DEV, inode_map, IMAPS * BLOCK_SIZE);
+ xwrite(dev_fd, inode_map, SB_IMAPS * BLOCK_SIZE);
msg_eol = "cannot write zone map";
- xwrite(DEV, zone_map, ZMAPS * BLOCK_SIZE);
+ xwrite(dev_fd, zone_map, SB_ZMAPS * BLOCK_SIZE);
msg_eol = "cannot write inodes";
- xwrite(DEV, inode_buffer, INODE_BUFFER_SIZE);
+ xwrite(dev_fd, inode_buffer, INODE_BUFFER_SIZE);
msg_eol = "\n";
}
static void write_block(int blk, char *buffer)
{
- xlseek(DEV, blk * BLOCK_SIZE, SEEK_SET);
- xwrite(DEV, buffer, BLOCK_SIZE);
+ xlseek(dev_fd, blk * BLOCK_SIZE, SEEK_SET);
+ xwrite(dev_fd, buffer, BLOCK_SIZE);
}
static int get_free_block(void)
if (used_good_blocks)
blk = good_blocks_table[used_good_blocks - 1] + 1;
else
- blk = FIRSTZONE;
- while (blk < ZONES && zone_in_use(blk))
+ blk = SB_FIRSTZONE;
+ while (blk < SB_ZONES && zone_in_use(blk))
blk++;
- if (blk >= ZONES)
+ if (blk >= SB_ZONES)
bb_error_msg_and_die("not enough good blocks");
good_blocks_table[used_good_blocks] = blk;
used_good_blocks++;
static int next(int zone)
{
if (!zone)
- zone = FIRSTZONE - 1;
- while (++zone < ZONES)
+ zone = SB_FIRSTZONE - 1;
+ while (++zone < SB_ZONES)
if (zone_in_use(zone))
return zone;
return 0;
static void make_bad_inode(void)
{
- struct minix_inode *inode = &Inode[MINIX_BAD_INO];
+ struct minix1_inode *inode = &INODE_BUF1[MINIX_BAD_INO];
int i, j, zone;
int ind = 0, dind = 0;
unsigned short ind_block[BLOCK_SIZE >> 1];
inode->i_nlinks = 1;
/* BTW, setting this makes all images different */
/* it's harder to check for bugs then - diff isn't helpful :(... */
- inode->i_time = time(NULL);
+ inode->i_time = CUR_TIME;
inode->i_mode = S_IFREG + 0000;
inode->i_size = badblocks * BLOCK_SIZE;
zone = next(0);
}
}
bb_error_msg_and_die("too many bad blocks");
- end_bad:
+ end_bad:
if (ind)
write_block(ind, (char *) ind_block);
if (dind)
#if ENABLE_FEATURE_MINIX2
static void make_bad_inode2(void)
{
- struct minix2_inode *inode = &Inode2[MINIX_BAD_INO];
+ struct minix2_inode *inode = &INODE_BUF2[MINIX_BAD_INO];
int i, j, zone;
int ind = 0, dind = 0;
unsigned long ind_block[BLOCK_SIZE >> 2];
return;
mark_inode(MINIX_BAD_INO);
inode->i_nlinks = 1;
- inode->i_atime = inode->i_mtime = inode->i_ctime = time(NULL);
+ inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
inode->i_mode = S_IFREG + 0000;
inode->i_size = badblocks * BLOCK_SIZE;
zone = next(0);
}
/* Could make triple indirect block here */
bb_error_msg_and_die("too many bad blocks");
- end_bad:
+ end_bad:
if (ind)
write_block(ind, (char *) ind_block);
if (dind)
static void make_root_inode(void)
{
- struct minix_inode *inode = &Inode[MINIX_ROOT_INO];
+ struct minix1_inode *inode = &INODE_BUF1[MINIX_ROOT_INO];
mark_inode(MINIX_ROOT_INO);
inode->i_zone[0] = get_free_block();
inode->i_nlinks = 2;
- inode->i_time = time(NULL);
+ inode->i_time = CUR_TIME;
if (badblocks)
inode->i_size = 3 * dirsize;
else {
inode->i_size = 2 * dirsize;
}
inode->i_mode = S_IFDIR + 0755;
- inode->i_uid = getuid();
+ inode->i_uid = GETUID;
if (inode->i_uid)
- inode->i_gid = getgid();
+ inode->i_gid = GETGID;
write_block(inode->i_zone[0], root_block);
}
#if ENABLE_FEATURE_MINIX2
static void make_root_inode2(void)
{
- struct minix2_inode *inode = &Inode2[MINIX_ROOT_INO];
+ struct minix2_inode *inode = &INODE_BUF2[MINIX_ROOT_INO];
mark_inode(MINIX_ROOT_INO);
inode->i_zone[0] = get_free_block();
inode->i_nlinks = 2;
- inode->i_atime = inode->i_mtime = inode->i_ctime = time(NULL);
+ inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
if (badblocks)
inode->i_size = 3 * dirsize;
else {
inode->i_size = 2 * dirsize;
}
inode->i_mode = S_IFDIR + 0755;
- inode->i_uid = getuid();
+ inode->i_uid = GETUID;
if (inode->i_uid)
- inode->i_gid = getgid();
+ inode->i_gid = GETGID;
write_block(inode->i_zone[0], root_block);
}
#endif
memset(super_block_buffer, 0, BLOCK_SIZE);
memset(boot_block_buffer, 0, 512);
- MAGIC = magic;
- ZONESIZE = 0;
- MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
- if (version2) {
- Super.s_zones = BLOCKS;
- } else
- Super.s_nzones = BLOCKS;
+ SB_MAGIC = magic;
+ SB_ZONE_SIZE = 0;
+ SB_MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
+ if (version2)
+ SB.s_zones = total_blocks;
+ else
+ SB.s_nzones = total_blocks;
-/* some magic nrs: 1 inode / 3 blocks */
+ /* some magic nrs: 1 inode / 3 blocks */
if (req_nr_inodes == 0)
- inodes = BLOCKS / 3;
+ inodes = total_blocks / 3;
else
inodes = 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));
+ inodes = (inodes + MINIX2_INODES_PER_BLOCK - 1) &
+ ~(MINIX2_INODES_PER_BLOCK - 1);
else
- inodes = ((inodes + MINIX_INODES_PER_BLOCK - 1) &
- ~(MINIX_INODES_PER_BLOCK - 1));
+ inodes = (inodes + MINIX1_INODES_PER_BLOCK - 1) &
+ ~(MINIX1_INODES_PER_BLOCK - 1);
if (inodes > 65535)
inodes = 65535;
- INODES = inodes;
- IMAPS = UPPER(INODES + 1, BITS_PER_BLOCK);
- ZMAPS = 0;
- i = 0;
- while (ZMAPS !=
- UPPER(BLOCKS - (2 + IMAPS + ZMAPS + INODE_BLOCKS) + 1,
- BITS_PER_BLOCK) && i < 1000) {
- ZMAPS =
- UPPER(BLOCKS - (2 + IMAPS + ZMAPS + INODE_BLOCKS) + 1,
- BITS_PER_BLOCK);
- i++;
- }
+ 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
- * /sbin/mkfs.minix -i 200 test.fs
- * */
- if (i >= 999) {
- bb_error_msg_and_die("cannot allocate buffers for maps");
- }
- FIRSTZONE = NORM_FIRSTZONE;
- inode_map = xmalloc(IMAPS * BLOCK_SIZE);
- zone_map = xmalloc(ZMAPS * BLOCK_SIZE);
- memset(inode_map, 0xff, IMAPS * BLOCK_SIZE);
- memset(zone_map, 0xff, ZMAPS * BLOCK_SIZE);
- for (i = FIRSTZONE; i < ZONES; i++)
+ * mkfs.minix -i 200 test.fs
+ */
+ /* This code is not insane: NORM_FIRSTZONE is not a constant, */
+ /* it uses previous value of SB_ZMAPS inside */
+ i = 999;
+ SB_ZMAPS = 0;
+ do {
+ uint16_t t = div_roundup(total_blocks - NORM_FIRSTZONE + 1, BITS_PER_BLOCK);
+ if (SB_ZMAPS == t) goto got_it;
+ SB_ZMAPS = t;
+ } while (--i);
+ bb_error_msg_and_die("incompatible size/inode count, try different -i N");
+ got_it:
+
+ SB_FIRSTZONE = NORM_FIRSTZONE;
+ inode_map = xmalloc(SB_IMAPS * BLOCK_SIZE);
+ zone_map = xmalloc(SB_ZMAPS * BLOCK_SIZE);
+ memset(inode_map, 0xff, SB_IMAPS * BLOCK_SIZE);
+ memset(zone_map, 0xff, SB_ZMAPS * BLOCK_SIZE);
+ for (i = SB_FIRSTZONE; i < SB_ZONES; i++)
unmark_zone(i);
- for (i = MINIX_ROOT_INO; i <= INODES; i++)
+ for (i = MINIX_ROOT_INO; i <= SB_INODES; i++)
unmark_inode(i);
- inode_buffer = xmalloc(INODE_BUFFER_SIZE);
- memset(inode_buffer, 0, INODE_BUFFER_SIZE);
- printf("%ld inodes\n", (long)INODES);
- printf("%ld blocks\n", (long)ZONES);
- printf("Firstdatazone=%ld (%ld)\n", (long)FIRSTZONE, (long)NORM_FIRSTZONE);
- printf("Zonesize=%d\n", BLOCK_SIZE << ZONESIZE);
- printf("Maxsize=%ld\n\n", (long)MAXSIZE);
+ 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);
}
/*
/* Seek to the correct loc. */
msg_eol = "seek failed during testing of blocks";
- xlseek(DEV, current_block * BLOCK_SIZE, SEEK_SET);
+ xlseek(dev_fd, current_block * BLOCK_SIZE, SEEK_SET);
msg_eol = "\n";
/* Try the read */
- got = read(DEV, buffer, try * BLOCK_SIZE);
+ got = read(dev_fd, buffer, try * BLOCK_SIZE);
if (got < 0)
got = 0;
if (got & (BLOCK_SIZE - 1)) {
static void alarm_intr(int alnum)
{
- if (currently_testing >= ZONES)
+ if (currently_testing >= SB_ZONES)
return;
signal(SIGALRM, alarm_intr);
alarm(5);
currently_testing = 0;
signal(SIGALRM, alarm_intr);
alarm(5);
- while (currently_testing < ZONES) {
+ while (currently_testing < SB_ZONES) {
msg_eol = "seek failed in check_blocks";
- xlseek(DEV, currently_testing * BLOCK_SIZE, SEEK_SET);
+ xlseek(dev_fd, currently_testing * BLOCK_SIZE, SEEK_SET);
msg_eol = "\n";
try = TEST_BUFFER_BLOCKS;
- if (currently_testing + try > ZONES)
- try = ZONES - currently_testing;
+ if (currently_testing + try > SB_ZONES)
+ try = SB_ZONES - currently_testing;
got = do_check(buffer, try, currently_testing);
currently_testing += got;
if (got == try)
continue;
- if (currently_testing < FIRSTZONE)
+ if (currently_testing < SB_FIRSTZONE)
bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
mark_zone(currently_testing);
badblocks++;
int mkfs_minix_main(int argc, char **argv)
{
+ struct mntent *mp;
unsigned opt;
char *tmp;
struct stat statbuf;
char *str_i, *str_n;
char *listfile = NULL;
- if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
+ 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)
//if (opt & 4) -l
if (opt & 8) { // -n
namelen = xatoi_u(str_n);
- if (namelen == 14) magic = MINIX_SUPER_MAGIC;
- else if (namelen == 30) magic = MINIX_SUPER_MAGIC2;
+ if (namelen == 14) magic = MINIX1_SUPER_MAGIC;
+ else if (namelen == 30) magic = MINIX1_SUPER_MAGIC2;
else bb_show_usage();
dirsize = namelen + 2;
}
device_name = *argv++;
if (!device_name)
bb_show_usage();
- if (*argv) {
- BLOCKS = xatou32(*argv);
- if (BLOCKS < 10)
- bb_show_usage();
- } else
- BLOCKS = get_size(device_name) / 1024;
+ if (*argv)
+ total_blocks = xatou32(*argv);
+ else
+ total_blocks = get_size(device_name) / 1024;
+
+ if (total_blocks < 10)
+ bb_error_msg_and_die("must have at least 10 blocks");
if (version2) {
magic = MINIX2_SUPER_MAGIC2;
if (namelen == 14)
magic = MINIX2_SUPER_MAGIC;
- } else if (BLOCKS > 65535)
- BLOCKS = 65535;
+ } else if (total_blocks > 65535)
+ total_blocks = 65535;
+
+ /* Check if it is mounted */
+ mp = find_mount_point(device_name, NULL);
+ if (mp && strcmp(device_name, mp->mnt_fsname) == 0)
+ bb_error_msg_and_die("%s is mounted on %s; "
+ "refusing to make a filesystem",
+ device_name, mp->mnt_dir);
+
+ dev_fd = xopen(device_name, O_RDWR);
+ if (fstat(dev_fd, &statbuf) < 0)
+ bb_error_msg_and_die("cannot stat %s", device_name);
+ if (!S_ISBLK(statbuf.st_mode))
+ opt &= ~1; // clear -c (check)
- if (find_mount_point(device_name, NULL))
- bb_error_msg_and_die("%s is mounted; refusing to make "
- "a filesystem", device_name);
+/* 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'", device_name);
+#endif
tmp = root_block;
*(short *) tmp = 1;
*(short *) tmp = 2;
strcpy(tmp + 2, ".badblocks");
- DEV = xopen(device_name, O_RDWR);
- if (fstat(DEV, &statbuf) < 0)
- bb_error_msg_and_die("cannot stat %s", device_name);
- if (!S_ISBLK(statbuf.st_mode))
- opt &= ~1; // clear -c (check)
- else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
- bb_error_msg_and_die("will not try to make filesystem on '%s'", device_name);
-
setup_tables();
if (opt & 1) // -c ?
projects / oweals / busybox.git / commitdiff