Permalink
Fetching contributors…
Cannot retrieve contributors at this time
842 lines (751 sloc) 23.4 KB
/*
* mkfs.minix.c - make a linux (minix) file-system.
*
* (C) 1991 Linus Torvalds. This file may be redistributed as per
* the Linux copyright.
*/
/*
* DD.MM.YY
*
* 24.11.91 - Time began. Used the fsck sources to get started.
*
* 25.11.91 - Corrected some bugs. Added support for ".badblocks"
* The algorithm for ".badblocks" is a bit weird, but
* it should work. Oh, well.
*
* 25.01.92 - Added the -l option for getting the list of bad blocks
* out of a named file. (Dave Rivers, rivers@ponds.uucp)
*
* 28.02.92 - Added %-information when using -c.
*
* 28.02.93 - Added support for other namelengths than the original
* 14 characters so that I can test the new kernel routines..
*
* 09.10.93 - Make exit status conform to that required by fsutil
* (Rik Faith, faith@cs.unc.edu)
*
* 31.10.93 - Added inode request feature, for backup floppies: use
* 32 inodes, for a news partition use more.
* (Scott Heavner, sdh@po.cwru.edu)
*
* 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)
*
* 09.11.94 - Added test to prevent overwrite of mounted fs adapted
* from Theodore Ts'o's (tytso@athena.mit.edu) mke2fs
* program. (Daniel Quinlan, quinlan@yggdrasil.com)
*
* 03.20.95 - Clear first 512 bytes of filesystem to make certain that
* the filesystem is not misidentified as a MS-DOS FAT filesystem.
* (Daniel Quinlan, quinlan@yggdrasil.com)
*
* 02.07.96 - Added small patch from Russell King to make the program a
* good deal more portable (janl@math.uio.no)
*
* 06.29.11 - Overall cleanups for util-linux and v3 support
* Davidlohr Bueso <dave@gnu.org>
*
* 06.20.15 - Do not infinite loop or crash on large devices
* Joshua Hudson <joshudson@gmail.com>
*
*/
#include <stdio.h>
#include <time.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <fcntl.h>
#include <ctype.h>
#include <stdlib.h>
#include <termios.h>
#include <sys/stat.h>
#include <getopt.h>
#include <err.h>
#include "blkdev.h"
#include "minix_programs.h"
#include "nls.h"
#include "pathnames.h"
#include "bitops.h"
#include "exitcodes.h"
#include "strutils.h"
#include "all-io.h"
#include "closestream.h"
#include "ismounted.h"
#define XALLOC_EXIT_CODE MKFS_EX_ERROR
#include "xalloc.h"
#define MINIX_ROOT_INO 1
#define MINIX_BAD_INO 2
#define TEST_BUFFER_BLOCKS 16
#define MAX_GOOD_BLOCKS 512
#define MINIX_MAX_INODES 65535
#define DEFAULT_FS_VERSION 1
/*
* Global variables used in minix_programs.h inline functions
*/
int fs_version = DEFAULT_FS_VERSION;
char *super_block_buffer;
static char *inode_buffer = NULL;
#define Inode (((struct minix_inode *) inode_buffer) - 1)
#define Inode2 (((struct minix2_inode *) inode_buffer) - 1)
struct fs_control {
char *device_name; /* device on a Minix file system is created */
int device_fd; /* open file descriptor of the device */
unsigned long long fs_blocks; /* device block count for the file system */
int fs_used_blocks; /* used blocks on a device */
int fs_bad_blocks; /* number of bad blocks found from device */
uint16_t fs_namelen; /* maximum length of filenames */
size_t fs_dirsize; /* maximum size of directory */
unsigned long fs_inodes; /* number of inodes */
int fs_magic; /* file system magic number */
unsigned int
check_blocks:1; /* check for bad blocks */
};
static char root_block[MINIX_BLOCK_SIZE];
static char boot_block_buffer[512];
static unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
static char *inode_map;
static char *zone_map;
#define zone_in_use(x) (isset(zone_map,(x)-get_first_zone()+1) != 0)
#define mark_inode(x) (setbit(inode_map,(x)))
#define unmark_inode(x) (clrbit(inode_map,(x)))
#define mark_zone(x) (setbit(zone_map,(x)-get_first_zone()+1))
#define unmark_zone(x) (clrbit(zone_map,(x)-get_first_zone()+1))
static void __attribute__((__noreturn__)) usage(void)
{
FILE *out = stdout;
fputs(USAGE_HEADER, out);
fprintf(out, _(" %s [options] /dev/name [blocks]\n"), program_invocation_short_name);
fputs(USAGE_OPTIONS, out);
fputs(_(" -1 use Minix version 1\n"), out);
fputs(_(" -2, -v use Minix version 2\n"), out);
fputs(_(" -3 use Minix version 3\n"), out);
fputs(_(" -n, --namelength <num> maximum length of filenames\n"), out);
fputs(_(" -i, --inodes <num> number of inodes for the filesystem\n"), out);
fputs(_(" -c, --check check the device for bad blocks\n"), out);
fputs(_(" -l, --badblocks <file> list of bad blocks from file\n"), out);
fputs(USAGE_SEPARATOR, out);
printf(USAGE_HELP_OPTIONS(25));
printf(USAGE_MAN_TAIL("mkfs.minix(8)"));
exit(MKFS_EX_OK);
}
#ifdef TEST_SCRIPT
static inline time_t mkfs_minix_time(time_t *t)
{
const char *str = getenv("MKFS_MINIX_TEST_SECOND_SINCE_EPOCH");
time_t sec;
if (str && sscanf(str, "%ld", &sec) == 1)
return sec;
return time(t);
}
#else /* !TEST_SCRIPT */
# define mkfs_minix_time(x) time(x)
#endif
static void super_set_state(void)
{
switch (fs_version) {
case 1:
case 2:
Super.s_state |= MINIX_VALID_FS;
Super.s_state &= ~MINIX_ERROR_FS;
break;
default: /* v3 */
break;
}
}
static void write_tables(const struct fs_control *ctl) {
unsigned long imaps = get_nimaps();
unsigned long zmaps = get_nzmaps();
size_t buffsz = get_inode_buffer_size();
/* Mark the super block valid. */
super_set_state();
if (lseek(ctl->device_fd, 0, SEEK_SET))
err(MKFS_EX_ERROR, _("%s: seek to boot block failed "
" in write_tables"), ctl->device_name);
if (write_all(ctl->device_fd, boot_block_buffer, 512))
err(MKFS_EX_ERROR, _("%s: unable to clear boot sector"), ctl->device_name);
if (MINIX_BLOCK_SIZE != lseek(ctl->device_fd, MINIX_BLOCK_SIZE, SEEK_SET))
err(MKFS_EX_ERROR, _("%s: seek failed in write_tables"), ctl->device_name);
if (write_all(ctl->device_fd, super_block_buffer, MINIX_BLOCK_SIZE))
err(MKFS_EX_ERROR, _("%s: unable to write super-block"), ctl->device_name);
if (write_all(ctl->device_fd, inode_map, imaps * MINIX_BLOCK_SIZE))
err(MKFS_EX_ERROR, _("%s: unable to write inode map"), ctl->device_name);
if (write_all(ctl->device_fd, zone_map, zmaps * MINIX_BLOCK_SIZE))
err(MKFS_EX_ERROR, _("%s: unable to write zone map"), ctl->device_name);
if (write_all(ctl->device_fd, inode_buffer, buffsz))
err(MKFS_EX_ERROR, _("%s: unable to write inodes"), ctl->device_name);
}
static void write_block(const struct fs_control *ctl, int blk, char * buffer) {
if (blk * MINIX_BLOCK_SIZE != lseek(ctl->device_fd, blk * MINIX_BLOCK_SIZE, SEEK_SET))
errx(MKFS_EX_ERROR, _("%s: seek failed in write_block"), ctl->device_name);
if (write_all(ctl->device_fd, buffer, MINIX_BLOCK_SIZE))
errx(MKFS_EX_ERROR, _("%s: write failed in write_block"), ctl->device_name);
}
static int get_free_block(struct fs_control *ctl) {
unsigned int blk;
unsigned int zones = get_nzones();
unsigned int first_zone = get_first_zone();
if (ctl->fs_used_blocks + 1 >= MAX_GOOD_BLOCKS)
errx(MKFS_EX_ERROR, _("%s: too many bad blocks"), ctl->device_name);
if (ctl->fs_used_blocks)
blk = good_blocks_table[ctl->fs_used_blocks - 1] + 1;
else
blk = first_zone;
while (blk < zones && zone_in_use(blk))
blk++;
if (blk >= zones)
errx(MKFS_EX_ERROR, _("%s: not enough good blocks"), ctl->device_name);
good_blocks_table[ctl->fs_used_blocks] = blk;
ctl->fs_used_blocks++;
return blk;
}
static void mark_good_blocks(const struct fs_control *ctl) {
int blk;
for (blk=0 ; blk < ctl->fs_used_blocks ; blk++)
mark_zone(good_blocks_table[blk]);
}
static inline int next(unsigned long zone) {
unsigned long zones = get_nzones();
unsigned long first_zone = get_first_zone();
if (!zone)
zone = first_zone-1;
while (++zone < zones)
if (zone_in_use(zone))
return zone;
return 0;
}
static void make_bad_inode_v1(struct fs_control *ctl)
{
struct minix_inode * inode = &Inode[MINIX_BAD_INO];
int i,j,zone;
int ind=0,dind=0;
unsigned short ind_block[MINIX_BLOCK_SIZE>>1];
unsigned short dind_block[MINIX_BLOCK_SIZE>>1];
#define NEXT_BAD (zone = next(zone))
if (!ctl->fs_bad_blocks)
return;
mark_inode(MINIX_BAD_INO);
inode->i_nlinks = 1;
inode->i_time = mkfs_minix_time(NULL);
inode->i_mode = S_IFREG + 0000;
inode->i_size = ctl->fs_bad_blocks * MINIX_BLOCK_SIZE;
zone = next(0);
for (i=0 ; i<7 ; i++) {
inode->i_zone[i] = zone;
if (!NEXT_BAD)
goto end_bad;
}
inode->i_zone[7] = ind = get_free_block(ctl);
memset(ind_block,0,MINIX_BLOCK_SIZE);
for (i=0 ; i<512 ; i++) {
ind_block[i] = zone;
if (!NEXT_BAD)
goto end_bad;
}
inode->i_zone[8] = dind = get_free_block(ctl);
memset(dind_block,0,MINIX_BLOCK_SIZE);
for (i=0 ; i<512 ; i++) {
write_block(ctl, ind,(char *) ind_block);
dind_block[i] = ind = get_free_block(ctl);
memset(ind_block,0,MINIX_BLOCK_SIZE);
for (j=0 ; j<512 ; j++) {
ind_block[j] = zone;
if (!NEXT_BAD)
goto end_bad;
}
}
errx(MKFS_EX_ERROR, _("%s: too many bad blocks"), ctl->device_name);
end_bad:
if (ind)
write_block(ctl, ind, (char *) ind_block);
if (dind)
write_block(ctl, dind, (char *) dind_block);
}
static void make_bad_inode_v2_v3 (struct fs_control *ctl)
{
struct minix2_inode *inode = &Inode2[MINIX_BAD_INO];
int i, j, zone;
int ind = 0, dind = 0;
unsigned long ind_block[MINIX_BLOCK_SIZE >> 2];
unsigned long dind_block[MINIX_BLOCK_SIZE >> 2];
if (!ctl->fs_bad_blocks)
return;
mark_inode (MINIX_BAD_INO);
inode->i_nlinks = 1;
inode->i_atime = inode->i_mtime = inode->i_ctime = mkfs_minix_time(NULL);
inode->i_mode = S_IFREG + 0000;
inode->i_size = ctl->fs_bad_blocks * MINIX_BLOCK_SIZE;
zone = next (0);
for (i = 0; i < 7; i++) {
inode->i_zone[i] = zone;
if (!NEXT_BAD)
goto end_bad;
}
inode->i_zone[7] = ind = get_free_block (ctl);
memset (ind_block, 0, MINIX_BLOCK_SIZE);
for (i = 0; i < 256; i++) {
ind_block[i] = zone;
if (!NEXT_BAD)
goto end_bad;
}
inode->i_zone[8] = dind = get_free_block (ctl);
memset (dind_block, 0, MINIX_BLOCK_SIZE);
for (i = 0; i < 256; i++) {
write_block (ctl, ind, (char *) ind_block);
dind_block[i] = ind = get_free_block (ctl);
memset (ind_block, 0, MINIX_BLOCK_SIZE);
for (j = 0; j < 256; j++) {
ind_block[j] = zone;
if (!NEXT_BAD)
goto end_bad;
}
}
/* Could make triple indirect block here */
errx(MKFS_EX_ERROR, _("%s: too many bad blocks"), ctl->device_name);
end_bad:
if (ind)
write_block (ctl, ind, (char *) ind_block);
if (dind)
write_block (ctl, dind, (char *) dind_block);
}
static void make_bad_inode(struct fs_control *ctl)
{
if (fs_version < 2) {
make_bad_inode_v1(ctl);
return;
}
make_bad_inode_v2_v3(ctl);
}
static void make_root_inode_v1(struct fs_control *ctl) {
struct minix_inode * inode = &Inode[MINIX_ROOT_INO];
mark_inode(MINIX_ROOT_INO);
inode->i_zone[0] = get_free_block(ctl);
inode->i_nlinks = 2;
inode->i_time = mkfs_minix_time(NULL);
if (ctl->fs_bad_blocks)
inode->i_size = 3 * ctl->fs_dirsize;
else {
memset(&root_block[2 * ctl->fs_dirsize], 0, ctl->fs_dirsize);
inode->i_size = 2 * ctl->fs_dirsize;
}
inode->i_mode = S_IFDIR + 0755;
inode->i_uid = getuid();
if (inode->i_uid)
inode->i_gid = getgid();
write_block(ctl, inode->i_zone[0],root_block);
}
static void make_root_inode_v2_v3 (struct fs_control *ctl) {
struct minix2_inode *inode = &Inode2[MINIX_ROOT_INO];
mark_inode (MINIX_ROOT_INO);
inode->i_zone[0] = get_free_block (ctl);
inode->i_nlinks = 2;
inode->i_atime = inode->i_mtime = inode->i_ctime = mkfs_minix_time(NULL);
if (ctl->fs_bad_blocks)
inode->i_size = 3 * ctl->fs_dirsize;
else {
memset(&root_block[2 * ctl->fs_dirsize], 0, ctl->fs_dirsize);
inode->i_size = 2 * ctl->fs_dirsize;
}
inode->i_mode = S_IFDIR + 0755;
inode->i_uid = getuid();
if (inode->i_uid)
inode->i_gid = getgid();
write_block (ctl, inode->i_zone[0], root_block);
}
static void make_root_inode(struct fs_control *ctl)
{
char *tmp = root_block;
if (fs_version == 3) {
*(uint32_t *) tmp = 1;
strcpy(tmp + 4, ".");
tmp += ctl->fs_dirsize;
*(uint32_t *) tmp = 1;
strcpy(tmp + 4, "..");
tmp += ctl->fs_dirsize;
*(uint32_t *) tmp = 2;
strcpy(tmp + 4, ".badblocks");
} else {
*(uint16_t *) tmp = 1;
strcpy(tmp + 2, ".");
tmp += ctl->fs_dirsize;
*(uint16_t *) tmp = 1;
strcpy(tmp + 2, "..");
tmp += ctl->fs_dirsize;
*(uint16_t *) tmp = 2;
strcpy(tmp + 2, ".badblocks");
}
if (fs_version < 2) {
make_root_inode_v1(ctl);
return;
}
make_root_inode_v2_v3(ctl);
}
static void super_set_nzones(const struct fs_control *ctl)
{
switch (fs_version) {
case 3:
Super3.s_zones = ctl->fs_blocks;
break;
case 2:
Super.s_zones = ctl->fs_blocks;
break;
default: /* v1 */
Super.s_nzones = ctl->fs_blocks;
break;
}
}
static void super_init_maxsize(void)
{
switch (fs_version) {
case 3:
Super3.s_max_size = 2147483647L;
break;
case 2:
Super.s_max_size = 0x7fffffff;
break;
default: /* v1 */
Super.s_max_size = (7+512+512*512)*1024;
break;
}
}
static void super_set_map_blocks(const struct fs_control *ctl, unsigned long inodes)
{
switch (fs_version) {
case 3:
Super3.s_imap_blocks = UPPER(inodes + 1, BITS_PER_BLOCK);
Super3.s_zmap_blocks = UPPER(ctl->fs_blocks - (1 + get_nimaps() + inode_blocks()),
BITS_PER_BLOCK + 1);
Super3.s_firstdatazone = first_zone_data();
break;
default:
Super.s_imap_blocks = UPPER(inodes + 1, BITS_PER_BLOCK);
Super.s_zmap_blocks = UPPER(ctl->fs_blocks - (1 + get_nimaps() + inode_blocks()),
BITS_PER_BLOCK + 1);
Super.s_firstdatazone = first_zone_data();
break;
}
}
static void super_set_magic(const struct fs_control *ctl)
{
switch (fs_version) {
case 3:
Super3.s_magic = ctl->fs_magic;
break;
default:
Super.s_magic = ctl->fs_magic;
break;
}
}
static void setup_tables(const struct fs_control *ctl) {
unsigned long inodes, zmaps, imaps, zones, i;
super_block_buffer = xcalloc(1, MINIX_BLOCK_SIZE);
memset(boot_block_buffer,0,512);
super_set_magic(ctl);
if (fs_version == 3) {
Super3.s_log_zone_size = 0;
Super3.s_blocksize = MINIX_BLOCK_SIZE;
}
else {
Super.s_log_zone_size = 0;
}
super_init_maxsize();
super_set_nzones(ctl);
zones = get_nzones();
/* some magic nrs: 1 inode / 3 blocks for smaller filesystems,
* for one inode / 16 blocks for large ones. mkfs will eventually
* crab about too far when getting close to the maximum size. */
if (ctl->fs_inodes == 0)
if (2048 * 1024 < ctl->fs_blocks) /* 2GB */
inodes = ctl->fs_blocks / 16;
else if (512 * 1024 < ctl->fs_blocks) /* 0.5GB */
inodes = ctl->fs_blocks / 8;
else
inodes = ctl->fs_blocks / 3;
else
inodes = ctl->fs_inodes;
/* Round up inode count to fill block size */
if (fs_version == 2 || fs_version == 3)
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));
if (fs_version == 3)
Super3.s_ninodes = inodes;
else {
if (inodes > MINIX_MAX_INODES)
inodes = MINIX_MAX_INODES;
Super.s_ninodes = inodes;
}
super_set_map_blocks(ctl, inodes);
if (MINIX_MAX_INODES < first_zone_data())
errx(MKFS_EX_ERROR,
_("First data block at %jd, which is too far (max %d).\n"
"Try specifying fewer inodes by passing --inodes <num>"),
(intmax_t)first_zone_data(),
MINIX_MAX_INODES);
imaps = get_nimaps();
zmaps = get_nzmaps();
inode_map = xmalloc(imaps * MINIX_BLOCK_SIZE);
zone_map = xmalloc(zmaps * MINIX_BLOCK_SIZE);
memset(inode_map,0xff,imaps * MINIX_BLOCK_SIZE);
memset(zone_map,0xff,zmaps * MINIX_BLOCK_SIZE);
for (i = get_first_zone() ; i<zones ; i++)
unmark_zone(i);
for (i = MINIX_ROOT_INO ; i<=inodes; i++)
unmark_inode(i);
inode_buffer = xmalloc(get_inode_buffer_size());
memset(inode_buffer,0, get_inode_buffer_size());
printf(P_("%lu inode\n", "%lu inodes\n", inodes), inodes);
printf(P_("%lu block\n", "%lu blocks\n", zones), zones);
printf(_("Firstdatazone=%jd (%jd)\n"),
(intmax_t)get_first_zone(), (intmax_t)first_zone_data());
printf(_("Zonesize=%zu\n"), (size_t) MINIX_BLOCK_SIZE << get_zone_size());
printf(_("Maxsize=%zu\n\n"),get_max_size());
}
/*
* Perform a test of a block; return the number of
* blocks readable/writable.
*/
static size_t do_check(const struct fs_control *ctl, char * buffer, int try, unsigned int current_block) {
ssize_t got;
/* Seek to the correct loc. */
if (lseek(ctl->device_fd, current_block * MINIX_BLOCK_SIZE, SEEK_SET) !=
current_block * MINIX_BLOCK_SIZE )
err(MKFS_EX_ERROR, _("%s: seek failed during testing of blocks"),
ctl->device_name);
/* Try the read */
got = read(ctl->device_fd, buffer, try * MINIX_BLOCK_SIZE);
if (got < 0) got = 0;
if (got & (MINIX_BLOCK_SIZE - 1 )) {
printf(_("Weird values in do_check: probably bugs\n"));
}
got /= MINIX_BLOCK_SIZE;
return got;
}
static unsigned int currently_testing = 0;
static void alarm_intr(int alnum __attribute__ ((__unused__))) {
unsigned long zones = get_nzones();
if (currently_testing >= zones)
return;
signal(SIGALRM,alarm_intr);
alarm(5);
if (!currently_testing)
return;
printf("%d ...", currently_testing);
fflush(stdout);
}
static void check_blocks(struct fs_control *ctl) {
size_t try, got;
static char buffer[MINIX_BLOCK_SIZE * TEST_BUFFER_BLOCKS];
unsigned long zones = get_nzones();
unsigned long first_zone = get_first_zone();
currently_testing=0;
signal(SIGALRM,alarm_intr);
alarm(5);
while (currently_testing < zones) {
if (lseek(ctl->device_fd, currently_testing * MINIX_BLOCK_SIZE,SEEK_SET) !=
currently_testing*MINIX_BLOCK_SIZE)
errx(MKFS_EX_ERROR, _("%s: seek failed in check_blocks"),
ctl->device_name);
try = TEST_BUFFER_BLOCKS;
if (currently_testing + try > zones)
try = zones-currently_testing;
got = do_check(ctl, buffer, try, currently_testing);
currently_testing += got;
if (got == try)
continue;
if (currently_testing < first_zone)
errx(MKFS_EX_ERROR, _("%s: bad blocks before data-area: "
"cannot make fs"), ctl->device_name);
mark_zone(currently_testing);
ctl->fs_bad_blocks++;
currently_testing++;
}
if (ctl->fs_bad_blocks > 0)
printf(P_("%d bad block\n", "%d bad blocks\n", ctl->fs_bad_blocks), ctl->fs_bad_blocks);
}
static void get_list_blocks(struct fs_control *ctl, char *filename) {
FILE *listfile;
unsigned long blockno;
listfile = fopen(filename,"r");
if (listfile == NULL)
err(MKFS_EX_ERROR, _("%s: can't open file of bad blocks"),
ctl->device_name);
while (!feof(listfile)) {
if (fscanf(listfile,"%lu\n", &blockno) != 1) {
printf(_("badblock number input error on line %d\n"), ctl->fs_bad_blocks + 1);
errx(MKFS_EX_ERROR, _("%s: cannot read badblocks file"),
ctl->device_name);
}
mark_zone(blockno);
ctl->fs_bad_blocks++;
}
fclose(listfile);
if (ctl->fs_bad_blocks > 0)
printf(P_("%d bad block\n", "%d bad blocks\n", ctl->fs_bad_blocks), ctl->fs_bad_blocks);
}
static int find_super_magic(const struct fs_control *ctl)
{
switch (fs_version) {
case 1:
if (ctl->fs_namelen == 14)
return MINIX_SUPER_MAGIC;
return MINIX_SUPER_MAGIC2;
case 2:
if (ctl->fs_namelen == 14)
return MINIX2_SUPER_MAGIC;
return MINIX2_SUPER_MAGIC2;
case 3:
return MINIX3_SUPER_MAGIC;
default:
abort();
}
}
static void determine_device_blocks(struct fs_control *ctl, const struct stat *statbuf)
{
unsigned long long dev_blocks;
if (S_ISBLK(statbuf->st_mode)) {
int sectorsize;
if (blkdev_get_sector_size(ctl->device_fd, &sectorsize) == -1)
sectorsize = DEFAULT_SECTOR_SIZE; /* kernel < 2.3.3 */
if (MINIX_BLOCK_SIZE < sectorsize)
errx(MKFS_EX_ERROR, _("block size smaller than physical "
"sector size of %s"), ctl->device_name);
if (blkdev_get_size(ctl->device_fd, &dev_blocks) == -1)
errx(MKFS_EX_ERROR, _("cannot determine size of %s"), ctl->device_name);
dev_blocks /= MINIX_BLOCK_SIZE;
} else if (!S_ISBLK(statbuf->st_mode))
dev_blocks = statbuf->st_size / MINIX_BLOCK_SIZE;
if (!ctl->fs_blocks)
ctl->fs_blocks = dev_blocks;
else if (dev_blocks < ctl->fs_blocks)
errx(MKFS_EX_ERROR,
_("%s: requested blocks (%llu) exceeds available (%llu) blocks\n"),
ctl->device_name, ctl->fs_blocks, dev_blocks);
if (ctl->fs_blocks < 10)
errx(MKFS_EX_ERROR, _("%s: number of blocks too small"), ctl->device_name);
if (fs_version == 1 && ctl->fs_blocks > MINIX_MAX_INODES)
ctl->fs_blocks = MINIX_MAX_INODES;
if (ctl->fs_blocks > (4 + ((MINIX_MAX_INODES - 4) * BITS_PER_BLOCK)))
ctl->fs_blocks = 4 + ((MINIX_MAX_INODES - 4) * BITS_PER_BLOCK); /* Utter maximum: Clip. */
}
static void check_user_instructions(struct fs_control *ctl)
{
switch (fs_version) {
case 1:
case 2:
if (ctl->fs_namelen == 14 || ctl->fs_namelen == 30)
ctl->fs_dirsize = ctl->fs_namelen + 2;
else
errx(MKFS_EX_ERROR, _("unsupported name length: %d"), ctl->fs_namelen);
break;
case 3:
if (ctl->fs_namelen == 60)
ctl->fs_dirsize = ctl->fs_namelen + 4;
else
errx(MKFS_EX_ERROR, _("unsupported name length: %d"), ctl->fs_namelen);
break;
default:
errx(MKFS_EX_ERROR, _("unsupported minix file system version: %d"), fs_version);
}
ctl->fs_magic = find_super_magic(ctl);
}
int main(int argc, char ** argv)
{
struct fs_control ctl = {
.fs_namelen = 30, /* keep in sync with DEFAULT_FS_VERSION */
0
};
int i;
struct stat statbuf;
char * listfile = NULL;
static const struct option longopts[] = {
{"namelength", required_argument, NULL, 'n'},
{"inodes", required_argument, NULL, 'i'},
{"check", no_argument, NULL, 'c'},
{"badblocks", required_argument, NULL, 'l'},
{"version", no_argument, NULL, 'V'},
{"help", no_argument, NULL, 'h'},
{NULL, 0, NULL, 0}
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
strutils_set_exitcode(MKFS_EX_USAGE);
while ((i = getopt_long(argc, argv, "1v23n:i:cl:Vh", longopts, NULL)) != -1)
switch (i) {
case '1':
fs_version = 1;
break;
case 'v': /* kept for backwards compatibility */
warnx(_("-v is ambiguous, use '-2' instead"));
/* fallthrough */
case '2':
fs_version = 2;
break;
case '3':
fs_version = 3;
ctl.fs_namelen = 60;
break;
case 'n':
ctl.fs_namelen = strtou16_or_err(optarg,
_("failed to parse maximum length of filenames"));
break;
case 'i':
ctl.fs_inodes = strtoul_or_err(optarg,
_("failed to parse number of inodes"));
break;
case 'c':
ctl.check_blocks = 1;
break;
case 'l':
listfile = optarg;
break;
case 'V':
printf(UTIL_LINUX_VERSION);
return MKFS_EX_OK;
case 'h':
usage();
default:
errtryhelp(MKFS_EX_USAGE);
}
argc -= optind;
argv += optind;
if (argc > 0) {
ctl.device_name = argv[0];
argc--;
argv++;
}
if (argc > 0)
ctl.fs_blocks = strtoul_or_err(argv[0], _("failed to parse number of blocks"));
if (!ctl.device_name) {
warnx(_("no device specified"));
errtryhelp(MKFS_EX_USAGE);
}
check_user_instructions(&ctl);
if (is_mounted(ctl.device_name))
errx(MKFS_EX_ERROR, _("%s is mounted; will not make a filesystem here!"),
ctl.device_name);
if (stat(ctl.device_name, &statbuf) < 0)
err(MKFS_EX_ERROR, _("stat of %s failed"), ctl.device_name);
ctl.device_fd = open_blkdev_or_file(&statbuf, ctl.device_name, O_RDWR);
if (ctl.device_fd < 0)
err(MKFS_EX_ERROR, _("cannot open %s"), ctl.device_name);
determine_device_blocks(&ctl, &statbuf);
setup_tables(&ctl);
if (ctl.check_blocks)
check_blocks(&ctl);
else if (listfile)
get_list_blocks(&ctl, listfile);
make_root_inode(&ctl);
make_bad_inode(&ctl);
mark_good_blocks(&ctl);
write_tables(&ctl);
if (close_fd(ctl.device_fd) != 0)
err(MKFS_EX_ERROR, _("write failed"));
return MKFS_EX_OK;
}