private AppleDisk createNewDisk(Mfs mfs, String name) throws Exception {
int diskCount = mfs.getDisks().size();
AppleDisk boot = mfs.getBootDisk();
String bootName = boot.getName();
String nextName =
bootName.substring(0, bootName.length() - 1)
+ (char) (bootName.charAt(bootName.length() - 1) + diskCount);
return new AppleDisk(name, nextName, boot.getBlock0().clone());
}
public void add(String bootDisk, String externalDisk) throws Exception {
log.debug("bootDisk='%s', externalDisk='%s'", bootDisk, externalDisk);
Mfs mfs = new Mfs(true, bootDisk);
AppleDisk target = null;
if (externalDisk == null) target = findLargestFreeSpace(mfs);
else target = createNewDisk(mfs, externalDisk);
target = add(mfs, target);
writeChanges(mfs, target);
if (externalDisk != null)
Utils.log(
"Added disk external disk '%s'. It will be named in Tivo as device '%s'\n",
externalDisk, target.getName());
}
private AppleDisk add(Mfs mfs, AppleDisk target) throws Exception {
long maxFreeBlocks = target.getAllocatableBlocks();
long logicalStartBlock = mfs.getMfs().getSize();
long chunkSize = 20480;
SizeSet partitionSizes = calcSizes(maxFreeBlocks, chunkSize);
addPartitions(mfs, target, partitionSizes);
addZone(mfs, logicalStartBlock, partitionSizes, chunkSize);
return target;
}
private void writeChanges(Mfs mfs, AppleDisk disk) throws Exception {
/* to minimize chance of disk being left in intermediate state
write new zone first, then partitions, then finally link the new zone to zone set and write MFS root
*/
List<Zone> zones = mfs.getZones();
writeZone(mfs, zones.get(zones.size() - 1));
// Utils.printf( System.out, "Writing partition table: %s", disk.getName() );
disk.write();
writeZone(mfs, zones.get(zones.size() - 2));
writeRoot(mfs);
}
