/**
* Flush all changed structures to the device.
*
* @throws IOException
*/
public void flush() throws IOException {
final BlockDeviceAPI api = getApi();
if (bs.isDirty()) {
bs.write(api);
}
for (FatFile f : files.values()) {
f.flush();
}
if (fat.isDirty()) {
for (int i = 0; i < bs.getNrFats(); i++) {
fat.write(api, FatUtils.getFatOffset(bs, i));
}
}
if (rootDir.isDirty()) {
rootDir.flush();
}
}
/** Constructor for FatFileSystem in specified readOnly mode */
public FatFileSystem(Device device, boolean readOnly, FatFileSystemType type)
throws FileSystemException {
super(device, readOnly, type); // false = read/write mode
try {
bs = new BootSector(512);
bs.read(getApi());
// if (!bs.isaValidBootSector()) throw new FileSystemException(
// "Can't mount this partition: Invalid BootSector");
// System.out.println(bs);
Fat[] fats = new Fat[bs.getNrFats()];
rootDir = new FatLfnDirectory(this, bs.getNrRootDirEntries());
FatType bitSize;
if (bs.getMediumDescriptor() == 0xf8) {
bitSize = FatType.FAT16;
} else {
bitSize = FatType.FAT12;
}
for (int i = 0; i < fats.length; i++) {
Fat fat =
new Fat(
bitSize, bs.getMediumDescriptor(), bs.getSectorsPerFat(), bs.getBytesPerSector());
fats[i] = fat;
fat.read(getApi(), FatUtils.getFatOffset(bs, i));
}
for (int i = 1; i < fats.length; i++) {
if (!fats[0].equals(fats[i])) {
System.out.println("FAT " + i + " differs from FAT 0");
}
}
fat = fats[0];
rootDir.read(getApi(), FatUtils.getRootDirOffset(bs));
rootEntry = new FatRootEntry(rootDir);
// files = new FatFile[fat.getNrEntries()];
} catch (IOException ex) {
throw new FileSystemException(ex);
} catch (Exception e) { // something bad happened in the FAT boot
// sector... just ignore this FS
throw new FileSystemException(e);
}
}
public int getClusterSize() {
return bs.getBytesPerSector() * bs.getSectorsPerCluster();
}
