/// <summary>
/// Finds the entry.
/// </summary>
/// <param name="compare">The compare.</param>
/// <param name="startCluster">The start cluster.</param>
/// <returns></returns>
public FatFileLocation FindEntry(FatFileSystem.ICompare compare, uint startCluster)
{
uint activeSector = startCluster * sectorsPerCluster;
if (startCluster == 0)
activeSector = (fatType == FatType.FAT32) ? GetSectorByCluster(rootCluster32) : firstRootDirectorySector;
uint increment = 0;
for (;;)
{
BinaryFormat directory = new BinaryFormat(partition.ReadBlock(activeSector, 1));
for (uint index = 0; index < entriesPerSector; index++)
{
if (compare.Compare(directory.Data, index * 32, fatType))
{
FatFileAttributes attribute = (FatFileAttributes)directory.GetByte((index * Entry.EntrySize) + Entry.FileAttributes);
return new FatFileLocation(GetClusterEntry(directory.Data, index, fatType), activeSector, index, (attribute & FatFileAttributes.SubDirectory) != 0);
}
if (directory.GetByte(Entry.DOSName + (index * Entry.EntrySize)) == FileNameAttribute.LastEntry)
return new FatFileLocation();
}
++increment;
if ((startCluster == 0) && (fatType != FatType.FAT32))
{
// FAT12/16 Root directory
if (increment >= rootDirSectors)
return new FatFileLocation();
activeSector = startCluster + increment;
continue;
}
else
{
// subdirectory
if (increment < sectorsPerCluster)
{
// still within cluster
activeSector = startCluster + increment;
continue;
}
// exiting cluster
// goto next cluster (if any)
uint cluster = GetClusterBySector(startCluster);
if (cluster == 0)
return new FatFileLocation();
uint nextCluster = GetClusterEntryValue(cluster);
if ((IsClusterLast(nextCluster)) || (IsClusterBad(nextCluster)) || (IsClusterFree(nextCluster)) || (IsClusterReserved(nextCluster)))
return new FatFileLocation();
activeSector = (uint)(dataAreaStart + (nextCluster - 1 * sectorsPerCluster));
continue;
}
}
}
/// <summary>
/// Starts this instance.
/// </summary>
public static void Start()
{
// Setup hardware abstraction interface
IHardwareAbstraction hardwareAbstraction = new Mosa.EmulatedKernel.HardwareAbstraction();
// Set device driver system to the emulator port and memory methods
Mosa.DeviceSystem.HAL.SetHardwareAbstraction(hardwareAbstraction);
// Start the emulated devices
Mosa.EmulatedDevices.Setup.Initialize();
// Initialize the driver system
Mosa.DeviceSystem.Setup.Initialize();
// Registry device drivers
Mosa.DeviceSystem.Setup.DeviceDriverRegistry.RegisterBuiltInDeviceDrivers();
Mosa.DeviceSystem.Setup.DeviceDriverRegistry.RegisterDeviceDrivers(typeof(Mosa.DeviceDrivers.ISA.CMOS).Module.Assembly);
// Set the interrupt handler
Mosa.DeviceSystem.HAL.SetInterruptHandler(Mosa.DeviceSystem.Setup.ResourceManager.InterruptManager.ProcessInterrupt);
// Start the driver system
Mosa.DeviceSystem.Setup.Start();
// Create pci controller manager
PCIControllerManager pciControllerManager = new PCIControllerManager(Mosa.DeviceSystem.Setup.DeviceManager);
// Create pci controller devices
pciControllerManager.CreatePartitionDevices();
// Create synthetic graphic pixel device
Mosa.EmulatedDevices.Synthetic.PixelGraphicDevice pixelGraphicDevice = new Mosa.EmulatedDevices.Synthetic.PixelGraphicDevice(Mosa.EmulatedDevices.Setup.PrimaryDisplayForm);
// Added the synthetic graphic device to the device drivers
Mosa.DeviceSystem.Setup.DeviceManager.Add(pixelGraphicDevice);
// Create synthetic ram disk device
Mosa.EmulatedDevices.Synthetic.RamDiskDevice ramDiskDevice = new Mosa.EmulatedDevices.Synthetic.RamDiskDevice(1024 * 1024 * 10 / 512);
// Add emulated ram disk device to the device drivers
Mosa.DeviceSystem.Setup.DeviceManager.Add(ramDiskDevice);
// Create disk controller manager
DiskControllerManager diskControllerManager = new DiskControllerManager(Mosa.DeviceSystem.Setup.DeviceManager);
// Create disk devices from disk controller devices
diskControllerManager.CreateDiskDevices();
// Get the text VGA device
LinkedList<IDevice> devices = Mosa.DeviceSystem.Setup.DeviceManager.GetDevices(new FindDevice.WithName("VGAText"));
// Create a screen interface to the text VGA device
ITextScreen screen = new TextScreen((ITextDevice)devices.First.value);
// Create synthetic keyboard device
Mosa.EmulatedDevices.Synthetic.Keyboard keyboard = new Mosa.EmulatedDevices.Synthetic.Keyboard(Mosa.EmulatedDevices.Setup.PrimaryDisplayForm);
// Add the synthetic keyboard device to the device drivers
Mosa.DeviceSystem.Setup.DeviceManager.Add(keyboard);
// Create master boot block record
MasterBootBlock mbr = new MasterBootBlock(ramDiskDevice);
mbr.DiskSignature = 0x12345678;
mbr.Partitions[0].Bootable = true;
mbr.Partitions[0].StartLBA = 17;
mbr.Partitions[0].TotalBlocks = ramDiskDevice.TotalBlocks - 17;
mbr.Partitions[0].PartitionType = PartitionType.FAT12;
mbr.Write();
// Create partition device
PartitionDevice partitionDevice = new PartitionDevice(ramDiskDevice, mbr.Partitions[0], false);
// Set FAT settings
FatSettings fatSettings = new FatSettings();
fatSettings.FATType = FatType.FAT12;
fatSettings.FloppyMedia = false;
fatSettings.VolumeLabel = "MOSADISK";
fatSettings.SerialID = new byte[4] { 0x01, 0x02, 0x03, 0x04 };
// Create FAT file system
FatFileSystem fat12 = new FatFileSystem(partitionDevice);
fat12.Format(fatSettings);
// Create partition manager
PartitionManager partitionManager = new PartitionManager(Mosa.DeviceSystem.Setup.DeviceManager);
// Create partition devices
partitionManager.CreatePartitionDevices();
// Get a list of all devices
devices = Mosa.DeviceSystem.Setup.DeviceManager.GetAllDevices();
// Print them
screen.WriteLine("Devices: ");
foreach (IDevice device in devices) {
screen.Write(device.Name);
screen.Write(" [");
switch (device.Status) {
case DeviceStatus.Online: screen.Write("Online"); break;
case DeviceStatus.Available: screen.Write("Available"); break;
case DeviceStatus.Initializing: screen.Write("Initializing"); break;
case DeviceStatus.NotFound: screen.Write("Not Found"); break;
case DeviceStatus.Error: screen.Write("Error"); break;
}
screen.Write("]");
if (device.Parent != null) {
screen.Write(" - Parent: ");
screen.Write(device.Parent.Name);
}
screen.WriteLine();
if (device is IPartitionDevice) {
FileSystem.FAT.FatFileSystem fat = new Mosa.FileSystem.FAT.FatFileSystem(device as IPartitionDevice);
screen.Write(" File System: ");
if (fat.IsValid) {
switch (fat.FATType) {
case FatType.FAT12: screen.WriteLine("FAT12"); break;
case FatType.FAT16: screen.WriteLine("FAT16"); break;
case FatType.FAT32: screen.WriteLine("FAT32"); break;
default: screen.WriteLine("Unknown"); break;
}
screen.WriteLine(" Volume Name: " + fat.VolumeLabel);
}
else
screen.WriteLine("Unknown");
}
if (device is PCIDevice) {
PCIDevice pciDevice = (device as PCIDevice);
screen.Write(" Vendor:0x");
screen.Write(pciDevice.VendorID.ToString("X"));
screen.Write(" [");
screen.Write(DeviceTable.Lookup(pciDevice.VendorID));
screen.WriteLine("]");
screen.Write(" Device:0x");
screen.Write(pciDevice.DeviceID.ToString("X"));
screen.Write(" Rev:0x");
screen.Write(pciDevice.RevisionID.ToString("X"));
screen.Write(" [");
screen.Write(DeviceTable.Lookup(pciDevice.VendorID, pciDevice.DeviceID));
screen.WriteLine("]");
screen.Write(" Class:0x");
screen.Write(pciDevice.ClassCode.ToString("X"));
screen.Write(" [");
screen.Write(ClassCodeTable.Lookup(pciDevice.ClassCode));
screen.WriteLine("]");
screen.Write(" SubClass:0x");
screen.Write(pciDevice.SubClassCode.ToString("X"));
screen.Write(" [");
screen.Write(SubClassCodeTable.Lookup(pciDevice.ClassCode, pciDevice.SubClassCode, pciDevice.ProgIF));
screen.WriteLine("]");
// screen.Write(" ");
// screen.WriteLine(DeviceTable.Lookup(pciDevice.VendorID, pciDevice.DeviceID, pciDevice.SubDeviceID, pciDevice.SubVendorID));
foreach (BaseAddress address in pciDevice.BaseAddresses) {
if (address == null)
continue;
if (address.Address == 0)
continue;
screen.Write(" ");
if (address.Region == AddressType.IO)
screen.Write("I/O Port at 0x");
else
screen.Write("Memory at 0x");
screen.Write(address.Address.ToString("X"));
screen.Write(" [size=");
if ((address.Size & 0xFFFFF) == 0) {
screen.Write((address.Size >> 20).ToString());
screen.Write("M");
}
else if ((address.Size & 0x3FF) == 0) {
screen.Write((address.Size >> 10).ToString());
screen.Write("K");
}
else
screen.Write(address.Size.ToString());
screen.Write("]");
if (address.Prefetchable)
screen.Write("(prefetchable)");
screen.WriteLine();
}
if (pciDevice.IRQ != 0) {
screen.Write(" ");
screen.Write("IRQ at ");
screen.Write(pciDevice.IRQ.ToString());
screen.WriteLine();
}
}
}
//while (keyboard.GetKeyPressed() == null) ;
Mosa.HelloWorld.Boot.Main();
//EmulatorDemo.StartDemo();
return;
}
/// <summary>
/// Creates the specified options.
/// </summary>
/// <param name="options">The options.</param>
public static void Create(BootImageOptions options)
{
if (File.Exists(options.DiskImageFileName))
{
File.Delete(options.DiskImageFileName);
}
uint blockCount = options.BlockCount;
if (blockCount == 0)
{
blockCount = 8400 + 1;
foreach (var file in options.IncludeFiles)
{
blockCount += ((uint)file.Content.Length / SectorSize) + 1;
}
}
var diskGeometry = new DiskGeometry();
diskGeometry.GuessGeometry(blockCount);
// Create disk image file
var diskDevice = new BlockFileStream(options.DiskImageFileName);
if (options.ImageFormat == ImageFormat.VDI)
{
// Create header
var header = VDI.CreateHeader(
blockCount,
options.MediaGuid.ToByteArray(),
options.MediaLastSnapGuid.ToByteArray(),
diskGeometry
);
diskDevice.WriteBlock(0, 1, header);
var map = VDI.CreateImageMap(blockCount);
diskDevice.WriteBlock(1, (uint)(map.Length / SectorSize), map);
diskDevice.BlockOffset = 1 + (uint)(map.Length / 512);
}
// Expand disk image
diskDevice.WriteBlock(blockCount - 1, 1, new byte[SectorSize]);
// Create partition device
PartitionDevice partitionDevice;
if (options.MBROption)
{
// Create master boot block record
var mbr = new MasterBootBlock(diskDevice);
// Setup partition entry
mbr.DiskSignature = 0x12345678;
mbr.Partitions[0].Bootable = true;
mbr.Partitions[0].StartLBA = diskGeometry.SectorsPerTrack;
mbr.Partitions[0].TotalBlocks = blockCount - mbr.Partitions[0].StartLBA;
switch (options.FileSystem)
{
case FileSystem.FAT12: mbr.Partitions[0].PartitionType = PartitionType.FAT12; break;
case FileSystem.FAT16: mbr.Partitions[0].PartitionType = PartitionType.FAT16; break;
case FileSystem.FAT32: mbr.Partitions[0].PartitionType = PartitionType.FAT32; break;
default: break;
}
mbr.Code = options.MBRCode;
mbr.Write();
partitionDevice = new PartitionDevice(diskDevice, mbr.Partitions[0], false);
}
else
{
partitionDevice = new PartitionDevice(diskDevice, false);
}
// Set FAT settings
var fatSettings = new FatSettings();
switch (options.FileSystem)
{
case FileSystem.FAT12: fatSettings.FATType = FatType.FAT12; break;
case FileSystem.FAT16: fatSettings.FATType = FatType.FAT16; break;
case FileSystem.FAT32: fatSettings.FATType = FatType.FAT32; break;
default: break;
}
fatSettings.FloppyMedia = false;
fatSettings.VolumeLabel = options.VolumeLabel;
fatSettings.SerialID = new byte[4] { 0x01, 0x02, 0x03, 0x04 };
fatSettings.SectorsPerTrack = diskGeometry.SectorsPerTrack;
fatSettings.NumberOfHeads = diskGeometry.Heads;
fatSettings.HiddenSectors = diskGeometry.SectorsPerTrack;
fatSettings.OSBootCode = options.FatBootCode;
// Create FAT file system
var fat = new FatFileSystem(partitionDevice);
if (!fat.Format(fatSettings))
{
throw new Exception("ERROR: Invalid FAT settings");
}
fat.SetVolumeName(options.VolumeLabel);
foreach (var includeFile in options.IncludeFiles)
{
var fileAttributes = new FatFileAttributes();
if (includeFile.Archive) fileAttributes |= FatFileAttributes.Archive;
if (includeFile.ReadOnly) fileAttributes |= FatFileAttributes.ReadOnly;
if (includeFile.Hidden) fileAttributes |= FatFileAttributes.Hidden;
if (includeFile.System) fileAttributes |= FatFileAttributes.System;
string newname = (Path.GetFileNameWithoutExtension(includeFile.Filename).PadRight(8).Substring(0, 8) + Path.GetExtension(includeFile.Filename).PadRight(4).Substring(1, 3)).ToUpper();
var location = fat.CreateFile(newname, fileAttributes);
if (!location.IsValid)
throw new Exception("Unable to write file");
var fatFileStream = new FatFileStream(fat, location);
fatFileStream.Write(includeFile.Content, 0, includeFile.Content.Length);
fatFileStream.Flush();
}
if (options.PatchSyslinuxOption)
{
if (options.BootLoader == BootLoader.Syslinux_6_03)
{
Syslinux.PatchSyslinux_6_03(partitionDevice, fat);
}
else if (options.BootLoader == BootLoader.Syslinux_3_72)
{
Syslinux.PatchSyslinux_3_72(partitionDevice, fat);
}
}
if (options.ImageFormat == ImageFormat.VHD)
{
// Create footer
var footer = VHD.CreateFooter(
blockCount,
(uint)(DateTime.Now - (new DateTime(2000, 1, 1, 0, 0, 0))).Seconds,
options.MediaGuid.ToByteArray(),
diskGeometry
);
diskDevice.WriteBlock(blockCount, 1, footer);
}
diskDevice.Dispose();
}
public static void PatchSyslinux_3_72(PartitionDevice partitionDevice, FatFileSystem fat)
{
// Locate ldlinux.sys file for patching
string filename = "ldlinux.sys";
string name = (Path.GetFileNameWithoutExtension(filename) + Path.GetExtension(filename).PadRight(4).Substring(0, 4)).ToUpper();
var location = fat.FindEntry(new Mosa.FileSystem.FAT.Find.WithName(name), 0);
if (location.IsValid)
{
// Read boot sector
var bootSector = new BinaryFormat(partitionDevice.ReadBlock(0, 1));
// Set the first sector location of the file
bootSector.SetUInt(0x1F8, fat.GetSectorByCluster(location.FirstCluster));
// Change jump address
bootSector.SetUInt(0x01, 0x58);
// Write back patched boot sector
partitionDevice.WriteBlock(0, 1, bootSector.Data);
// Get the file size & number of sectors used
uint fileSize = fat.GetFileSize(location.DirectorySector, location.DirectorySectorIndex);
uint sectorCount = (fileSize + 511) >> 9;
uint[] sectors = new uint[65];
uint nsec = 0;
// Create list of the first 65 sectors of the file
for (uint cluster = location.FirstCluster; ((cluster != 0) & (nsec <= 64)); cluster = fat.GetNextCluster(cluster))
{
uint sec = fat.GetSectorByCluster(cluster);
for (uint s = 0; s < fat.SectorsPerCluster; s++)
sectors[nsec++] = sec + s;
}
// Read the first cluster of the file
var firstCluster = new BinaryFormat(fat.ReadCluster(location.FirstCluster));
uint patchArea = 0;
// Search for 0x3EB202FE (magic)
for (patchArea = 0; (firstCluster.GetUInt(patchArea) != 0x3EB202FE) && (patchArea < fat.ClusterSizeInBytes); patchArea += 4) ;
patchArea = patchArea + 8;
if (patchArea < fat.ClusterSizeInBytes)
{
// Set up the totals
firstCluster.SetUShort(patchArea, (ushort)(fileSize >> 2));
firstCluster.SetUShort(patchArea + 2, (ushort)(sectorCount - 1));
// Clear sector entries
firstCluster.Fill(patchArea + 8, 0, 64 * 4);
// Set sector entries
for (nsec = 0; nsec < 64; nsec++)
firstCluster.SetUInt(patchArea + 8 + (nsec * 4), sectors[nsec + 1]);
// Clear out checksum
firstCluster.SetUInt(patchArea + 4, 0);
// Write back the updated cluster
fat.WriteCluster(location.FirstCluster, firstCluster.Data);
// Re-Calculate checksum by opening the file
var file = new FatFileStream(fat, location);
uint csum = 0x3EB202FE;
for (uint index = 0; index < (file.Length >> 2); index++)
{
uint value = (uint)file.ReadByte() | ((uint)file.ReadByte() << 8) | ((uint)file.ReadByte() << 16) | ((uint)file.ReadByte() << 24);
csum -= value;
}
// Set the checksum
firstCluster.SetUInt(patchArea + 4, csum);
// Write patched cluster back to disk
fat.WriteCluster(location.FirstCluster, firstCluster.Data);
}
}
}
/// <summary>
/// Creates the specified options.
/// </summary>
/// <param name="options">The options.</param>
public static void Create(Options options)
{
if (File.Exists(options.DiskImageFileName))
{
File.Delete(options.DiskImageFileName);
}
uint blockCount = options.BlockCount;
if (blockCount == 0)
{
blockCount = 8400 + 1;
foreach (var file in options.IncludeFiles)
{
blockCount += ((uint)file.Content.Length / 512) + 1;
}
}
var diskGeometry = new Mosa.DeviceSystem.DiskGeometry();
diskGeometry.GuessGeometry(blockCount);
// Create disk image file
BlockFileStream diskDevice = new BlockFileStream(options.DiskImageFileName);
if (options.ImageFormat == ImageFormatType.VDI)
{
// Create header
byte[] header = Mosa.DeviceSystem.VDI.CreateHeader(
blockCount,
options.MediaGuid.ToByteArray(),
options.MediaLastSnapGuid.ToByteArray(),
diskGeometry
);
diskDevice.WriteBlock(0, 1, header);
byte[] map = Mosa.DeviceSystem.VDI.CreateImageMap(blockCount);
diskDevice.WriteBlock(1, (uint)(map.Length / 512), map);
diskDevice.BlockOffset = 1 + (uint)(map.Length / 512);
}
// Expand disk image
diskDevice.WriteBlock(blockCount - 1, 1, new byte[512]);
// Create partition device
PartitionDevice partitionDevice;
if (options.MBROption)
{
// Create master boot block record
MasterBootBlock mbr = new MasterBootBlock(diskDevice);
// Setup partition entry
mbr.DiskSignature = 0x12345678;
mbr.Partitions[0].Bootable = true;
mbr.Partitions[0].StartLBA = diskGeometry.SectorsPerTrack;
mbr.Partitions[0].TotalBlocks = blockCount - mbr.Partitions[0].StartLBA;
switch (options.FileSystem)
{
case FileSystemType.FAT12: mbr.Partitions[0].PartitionType = PartitionType.FAT12; break;
case FileSystemType.FAT16: mbr.Partitions[0].PartitionType = PartitionType.FAT16; break;
case FileSystemType.FAT32: mbr.Partitions[0].PartitionType = PartitionType.FAT32; break;
default: break;
}
mbr.Code = options.MBRCode;
mbr.Write();
partitionDevice = new PartitionDevice(diskDevice, mbr.Partitions[0], false);
}
else
{
partitionDevice = new PartitionDevice(diskDevice, false);
}
// Set FAT settings
FatSettings fatSettings = new FatSettings();
switch (options.FileSystem)
{
case FileSystemType.FAT12: fatSettings.FATType = FatType.FAT12; break;
case FileSystemType.FAT16: fatSettings.FATType = FatType.FAT16; break;
case FileSystemType.FAT32: fatSettings.FATType = FatType.FAT32; break;
default: break;
}
fatSettings.FloppyMedia = false;
fatSettings.VolumeLabel = options.VolumeLabel;
fatSettings.SerialID = new byte[4] { 0x01, 0x02, 0x03, 0x04 };
fatSettings.SectorsPerTrack = diskGeometry.SectorsPerTrack;
fatSettings.NumberOfHeads = diskGeometry.Heads;
fatSettings.HiddenSectors = diskGeometry.SectorsPerTrack;
fatSettings.OSBootCode = options.FatBootCode;
// Create FAT file system
FatFileSystem fat = new FatFileSystem(partitionDevice);
if (!fat.Format(fatSettings))
{
throw new Exception("ERROR: Invalid FAT settings");
}
fat.SetVolumeName(options.VolumeLabel);
foreach (var includeFile in options.IncludeFiles)
{
Mosa.FileSystem.FAT.FatFileAttributes fileAttributes = new Mosa.FileSystem.FAT.FatFileAttributes();
if (includeFile.Archive) fileAttributes |= Mosa.FileSystem.FAT.FatFileAttributes.Archive;
if (includeFile.ReadOnly) fileAttributes |= Mosa.FileSystem.FAT.FatFileAttributes.ReadOnly;
if (includeFile.Hidden) fileAttributes |= Mosa.FileSystem.FAT.FatFileAttributes.Hidden;
if (includeFile.System) fileAttributes |= Mosa.FileSystem.FAT.FatFileAttributes.System;
//byte[] file = File.ReadAllBytes(includeFile.Filename);
string newname = (Path.GetFileNameWithoutExtension(includeFile.Filename).PadRight(8).Substring(0, 8) + Path.GetExtension(includeFile.Filename).PadRight(4).Substring(1, 3)).ToUpper();
FatFileLocation location = fat.CreateFile(newname, fileAttributes, 0);
if (!location.Valid)
throw new Exception("Unable to write file");
FatFileStream fatFileStream = new FatFileStream(fat, location);
fatFileStream.Write(includeFile.Content, 0, includeFile.Content.Length);
fatFileStream.Flush();
}
if (options.PatchSyslinuxOption)
{
// Locate ldlinux.sys file for patching
string filename = "ldlinux.sys";
string name = (Path.GetFileNameWithoutExtension(filename) + Path.GetExtension(filename).PadRight(4).Substring(0, 4)).ToUpper();
FatFileLocation location = fat.FindEntry(new Mosa.FileSystem.FAT.Find.WithName(name), 0);
if (location.Valid)
{
// Read boot sector
Mosa.ClassLib.BinaryFormat bootSector = new Mosa.ClassLib.BinaryFormat(partitionDevice.ReadBlock(0, 1));
// Set the first sector location of the file
bootSector.SetUInt(0x1F8, fat.GetSectorByCluster(location.FirstCluster));
// Change jump address
bootSector.SetUInt(0x01, 0x58);
// Write back patched boot sector
partitionDevice.WriteBlock(0, 1, bootSector.Data);
// Get the file size & number of sectors used
uint fileSize = fat.GetFileSize(location.DirectorySector, location.DirectorySectorIndex);
uint sectorCount = (fileSize + 511) >> 9;
uint[] sectors = new uint[65];
uint nsec = 0;
// Create list of the first 65 sectors of the file
for (uint cluster = location.FirstCluster; ((cluster != 0) & (nsec <= 64)); cluster = fat.GetNextCluster(cluster))
{
uint sec = fat.GetSectorByCluster(cluster);
for (uint s = 0; s < fat.SectorsPerCluster; s++)
sectors[nsec++] = sec + s;
}
// Read the first cluster of the file
Mosa.ClassLib.BinaryFormat firstCluster = new Mosa.ClassLib.BinaryFormat(fat.ReadCluster(location.FirstCluster));
uint patchArea = 0;
// Search for 0x3EB202FE (magic)
for (patchArea = 0; (firstCluster.GetUInt(patchArea) != 0x3EB202FE) && (patchArea < fat.ClusterSizeInBytes); patchArea += 4) ;
patchArea = patchArea + 8;
if (patchArea < fat.ClusterSizeInBytes)
{
// Set up the totals
firstCluster.SetUShort(patchArea, (ushort)(fileSize >> 2));
firstCluster.SetUShort(patchArea + 2, (ushort)(sectorCount - 1));
// Clear sector entries
firstCluster.Fill(patchArea + 8, 0, 64 * 4);
// Set sector entries
for (nsec = 0; nsec < 64; nsec++)
firstCluster.SetUInt(patchArea + 8 + (nsec * 4), sectors[nsec + 1]);
// Clear out checksum
firstCluster.SetUInt(patchArea + 4, 0);
// Write back the updated cluster
fat.WriteCluster(location.FirstCluster, firstCluster.Data);
// Re-Calculate checksum by opening the file
FatFileStream file = new FatFileStream(fat, location);
uint csum = 0x3EB202FE;
for (uint index = 0; index < (file.Length >> 2); index++)
{
uint value = (uint)file.ReadByte() | ((uint)file.ReadByte() << 8) | ((uint)file.ReadByte() << 16) | ((uint)file.ReadByte() << 24);
csum -= value;
}
// Set the checksum
firstCluster.SetUInt(patchArea + 4, csum);
// Write patched cluster back to disk
fat.WriteCluster(location.FirstCluster, firstCluster.Data);
}
}
}
if (options.ImageFormat == ImageFormatType.VHD)
{
// Create footer
byte[] footer = Mosa.DeviceSystem.VHD.CreateFooter(
blockCount,
(uint)(DateTime.Now - (new DateTime(2000, 1, 1, 0, 0, 0))).Seconds,
options.MediaGuid.ToByteArray(),
diskGeometry
);
diskDevice.WriteBlock(blockCount, 1, footer);
}
diskDevice.Dispose();
}
/// <summary>
/// Initializes a new instance of the <see cref="VfsFileSystem"/> class.
/// </summary>
/// <param name="fat">The fat.</param>
public VfsFileSystem(FatFileSystem fat)
{
this.fat = fat;
}
public static void PatchSyslinux_6_03(PartitionDevice partitionDevice, FatFileSystem fat)
{
// Locate ldlinux.sys file for patching
string filename = "ldlinux.sys";
string name = (Path.GetFileNameWithoutExtension(filename) + Path.GetExtension(filename).PadRight(4).Substring(0, 4)).ToUpper();
var location = fat.FindEntry(new Mosa.FileSystem.FAT.Find.WithName(name), 0);
if (!location.IsValid)
throw new InvalidProgramException("Unable to find syslinux.sys");
// Get the file size & number of sectors used
uint fileSize = fat.GetFileSize(location.DirectorySector, location.DirectorySectorIndex);
var sectors = new List<uint>();
// Create list of the sectors of the file
for (uint cluster = location.FirstCluster; (cluster != 0); cluster = fat.GetNextCluster(cluster))
{
uint sec = fat.GetSectorByCluster(cluster);
for (uint i = 0; i < fat.SectorsPerCluster; i++)
{
sectors.Add(sec + i);
}
}
// Get the ldlinux.sys file stream
var ldlinux = new FatFileStream(fat, location);
var ldlinuxReader = new EndianAwareBinaryReader(ldlinux, Endianness.Little);
// Search for 0x3EB202FE (magic)
while ((ldlinuxReader.ReadUInt32() != Syslinux.LDLINUX_MAGIC) && (ldlinux.Position < ldlinux.Length)) ;
if (ldlinux.Position >= ldlinux.Length || ldlinux.Position <= 0)
throw new InvalidProgramException("Unable to find patch location for syslinux");
uint patchArea = (uint)ldlinux.Position - 4;
// Get Extended Patch Area offset
ldlinux.Position = patchArea + Syslinux.PatchAreaOffset.EPAOffset;
ushort epa = ldlinuxReader.ReadUInt16();
ldlinux.Position = epa + Syslinux.ExtendedPatchAreaOffset.Sect1Ptr0;
uint sect1Ptr0 = (uint)ldlinuxReader.ReadUInt16();
ldlinux.Position = epa + Syslinux.ExtendedPatchAreaOffset.Sect1Ptr1;
uint sect1Ptr1 = (uint)ldlinuxReader.ReadUInt16();
ldlinux.Position = epa + Syslinux.ExtendedPatchAreaOffset.SecPtrOffset;
uint ex = (uint)ldlinuxReader.ReadUInt16();
ldlinux.Position = epa + Syslinux.ExtendedPatchAreaOffset.SecPtrCnt;
uint nptrs = (uint)ldlinuxReader.ReadUInt16();
ldlinux.Position = epa + Syslinux.ExtendedPatchAreaOffset.AdvPtrOffset;
uint advptrs = (uint)ldlinuxReader.ReadUInt16();
if (sectors.Count > nptrs)
throw new InvalidProgramException("Insufficient space for patching syslinux");
var ldlinuxWriter = new EndianAwareBinaryWriter(ldlinux, Endianness.Little);
// Set up the totals
ldlinux.Position = patchArea + Syslinux.PatchAreaOffset.DataSectors;
ldlinuxWriter.Write((ushort)sectors.Count);
ldlinux.Position = patchArea + Syslinux.PatchAreaOffset.DataSectors;
ldlinuxWriter.Write((ushort)2);
ldlinux.Position = patchArea + Syslinux.PatchAreaOffset.DataSectors;
ldlinuxWriter.Write((uint)fileSize >> 2);
// Generate Extents
var extents = GenerateExtents(sectors);
ldlinux.Position = ex;
// Write out extents
foreach (var extent in extents)
{
ldlinuxWriter.Write((ulong)extent.Start);
ldlinuxWriter.Write((ushort)extent.Length);
}
// Write out ADV
ldlinux.Position = advptrs;
ldlinuxWriter.Write((ulong)sectors[sectors.Count - 2]);
ldlinuxWriter.Write((ulong)sectors[sectors.Count - 1]);
// Clear out checksum
ldlinux.Position = patchArea + Syslinux.PatchAreaOffset.Checksum;
ldlinuxWriter.Write((uint)0);
// Write back the updated cluster
ldlinuxWriter.Flush();
// Re-Calculate checksum
ldlinux.Position = 0;
uint csum = Syslinux.LDLINUX_MAGIC;
for (uint index = 0; index < (ldlinux.Length >> 2); index++)
{
csum = csum + ldlinuxReader.ReadUInt32();
}
// Set the checksum
ldlinux.Position = patchArea + Syslinux.PatchAreaOffset.Checksum;
ldlinuxWriter.Write(csum);
// Write patched cluster back to disk
ldlinuxWriter.Flush();
// Read boot sector
var fatBootSector = new BinaryFormat(partitionDevice.ReadBlock(0, 1));
// Set the first sector location of the file
fatBootSector.SetUInt(sect1Ptr0, fat.GetSectorByCluster(location.FirstCluster));
fatBootSector.SetUInt(sect1Ptr1, 0); // since only 32-bit offsets are support, the high portion of 64-bit value is zero
// Write back patched boot sector
partitionDevice.WriteBlock(0, 1, fatBootSector.Data);
}
/// <summary>
/// Main
/// </summary>
/// <param name="args">The args.</param>
/// <returns></returns>
static int Main(string[] args)
{
Console.WriteLine();
Console.WriteLine("MakeImageBoot v1.0 [www.mosa-project.org]");
Console.WriteLine("Copyright 2010. New BSD License.");
Console.WriteLine("Written by Philipp Garcia ([email protected])");
Console.WriteLine();
string mbrFilename = string.Empty;
string fatcodeFilename = string.Empty;
string volumeLabel = string.Empty;
ImageFormat imageFormat = ImageFormat.VHD;
bool mbrOption = true;
bool patchSyslinuxOption = false;
bool floppyMedia = false;
uint blockCount = 1024 * 1024 / 512;
FileSystem fileSystem = FileSystem.FAT12;
List<IncludeFile> includeFiles = new List<IncludeFile>();
bool valid = (args.Length < 2);
if (valid)
valid = System.IO.File.Exists(args[0]);
if (valid)
{
Console.WriteLine("Usage: CreateBootImage <boot.config file> <image name>");
Console.Error.WriteLine("ERROR: Missing arguments");
return -1;
}
Console.WriteLine("Building image...");
try
{
StreamReader reader = File.OpenText(args[0]);
while (true)
{
string line = reader.ReadLine();
if (line == null) break;
if (string.IsNullOrEmpty(line))
continue;
string[] parts = line.Split('\t');
switch (parts[0].Trim())
{
case "-mbr": mbrOption = true; mbrFilename = (parts.Length > 1) ? parts[1] : null; break;
case "-boot": fatcodeFilename = (parts.Length > 1) ? parts[1] : null; break;
case "-vhd": imageFormat = ImageFormat.VHD; break;
case "-img": imageFormat = ImageFormat.IMG; break;
case "-vdi": imageFormat = ImageFormat.VDI; break;
case "-syslinux": patchSyslinuxOption = true; break;
case "-fat12": fileSystem = FileSystem.FAT12; break;
case "-fat16": fileSystem = FileSystem.FAT16; break;
case "-fat32": fileSystem = FileSystem.FAT32; break;
case "-file": if (parts.Length > 2) includeFiles.Add(new IncludeFile(parts[1], parts[2]));
else includeFiles.Add(new IncludeFile(parts[1])); break;
case "-blocks": blockCount = Convert.ToUInt32(parts[1]); break;
case "-volume": volumeLabel = parts[1]; break;
case "-floppy": floppyMedia = true; break;
default: break;
}
}
reader.Close();
if (System.IO.File.Exists(args[1]))
System.IO.File.Delete(args[1]);
DiskGeometry diskGeometry = new Mosa.DeviceSystem.DiskGeometry();
diskGeometry.GuessGeometry(blockCount);
Console.WriteLine("Disk Geometry CHS = " + diskGeometry.Cylinders + "/" + diskGeometry.Heads + "/" + diskGeometry.SectorsPerTrack);
// Create disk image file
Mosa.EmulatedDevices.Synthetic.DiskDevice diskDevice = new Mosa.EmulatedDevices.Synthetic.DiskDevice(args[1]);
if (imageFormat == ImageFormat.VDI)
{
// Create header
byte[] header = Mosa.DeviceSystem.VDI.CreateHeader(
blockCount,
Guid.NewGuid().ToByteArray(),
Guid.NewGuid().ToByteArray(),
diskGeometry
);
diskDevice.WriteBlock(0, 1, header);
byte[] map = Mosa.DeviceSystem.VDI.CreateImageMap(blockCount);
diskDevice.WriteBlock(1, (uint)(map.Length / 512), map);
diskDevice.BlockOffset = 1 + (uint)(map.Length / 512);
}
// Expand disk image
diskDevice.WriteBlock(blockCount - 1, 1, new byte[512]);
// Create partition device
PartitionDevice partitionDevice;
if (mbrOption)
{
// Create master boot block record
MasterBootBlock mbr = new MasterBootBlock(diskDevice);
// Setup partition entry
mbr.DiskSignature = 0x12345678;
mbr.Partitions[0].Bootable = true;
mbr.Partitions[0].StartLBA = diskGeometry.SectorsPerTrack;
mbr.Partitions[0].TotalBlocks = blockCount - mbr.Partitions[0].StartLBA;
switch (fileSystem)
{
case FileSystem.FAT12: mbr.Partitions[0].PartitionType = PartitionType.FAT12; break;
case FileSystem.FAT16: mbr.Partitions[0].PartitionType = PartitionType.FAT16; break;
case FileSystem.FAT32: mbr.Partitions[0].PartitionType = PartitionType.FAT32; break;
default: break;
}
if (!string.IsNullOrEmpty(mbrFilename))
mbr.Code = ReadFile(mbrFilename);
mbr.Write();
partitionDevice = new PartitionDevice(diskDevice, mbr.Partitions[0], false);
}
else
{
partitionDevice = new PartitionDevice(diskDevice, false);
}
// Set FAT settings
FatSettings fatSettings = new FatSettings();
switch (fileSystem)
{
case FileSystem.FAT12: fatSettings.FATType = FatType.FAT12; break;
case FileSystem.FAT16: fatSettings.FATType = FatType.FAT16; break;
case FileSystem.FAT32: fatSettings.FATType = FatType.FAT32; break;
default: break;
}
fatSettings.FloppyMedia = floppyMedia;
fatSettings.VolumeLabel = volumeLabel;
fatSettings.SerialID = new byte[4] { 0x01, 0x02, 0x03, 0x04 };
fatSettings.SectorsPerTrack = diskGeometry.SectorsPerTrack;
fatSettings.NumberOfHeads = diskGeometry.Heads;
fatSettings.HiddenSectors = diskGeometry.SectorsPerTrack;
if (!string.IsNullOrEmpty(fatcodeFilename))
fatSettings.OSBootCode = ReadFile(fatcodeFilename);
// Create FAT file system
FatFileSystem fat = new FatFileSystem(partitionDevice);
fat.Format(fatSettings);
fat.SetVolumeName(volumeLabel);
foreach (IncludeFile includeFile in includeFiles)
{
string filename = includeFile.Filename;
Mosa.FileSystem.FAT.FatFileAttributes fileAttributes = new Mosa.FileSystem.FAT.FatFileAttributes();
if (includeFile.Archive) fileAttributes |= Mosa.FileSystem.FAT.FatFileAttributes.Archive;
if (includeFile.ReadOnly) fileAttributes |= Mosa.FileSystem.FAT.FatFileAttributes.ReadOnly;
if (includeFile.Hidden) fileAttributes |= Mosa.FileSystem.FAT.FatFileAttributes.Hidden;
if (includeFile.System) fileAttributes |= Mosa.FileSystem.FAT.FatFileAttributes.System;
byte[] file = ReadFile(filename);
string newname = (Path.GetFileNameWithoutExtension(includeFile.Newname).PadRight(8).Substring(0, 8) + Path.GetExtension(includeFile.Newname).PadRight(3).Substring(1, 3)).ToUpper();
FatFileLocation location = fat.CreateFile(newname, fileAttributes, 0);
if (!location.Valid)
throw new Exception("Unable to write file");
FatFileStream fatFileStream = new FatFileStream(fat, location);
fatFileStream.Write(file, 0, file.Length);
fatFileStream.Flush();
}
if (patchSyslinuxOption)
{
// Locate ldlinux.sys file for patching
string filename = "ldlinux.sys";
string name = (Path.GetFileNameWithoutExtension(filename) + Path.GetExtension(filename).PadRight(3).Substring(0, 4)).ToUpper();
FatFileLocation location = fat.FindEntry(new Mosa.FileSystem.FAT.Find.WithName(name), 0);
if (location.Valid)
{
// Read boot sector
Mosa.ClassLib.BinaryFormat bootSector = new Mosa.ClassLib.BinaryFormat(partitionDevice.ReadBlock(0, 1));
// Set the first sector location of the file
bootSector.SetUInt(0x1F8, fat.GetSectorByCluster(location.FirstCluster));
// Change jump address
bootSector.SetUInt(0x01, 0x58);
// Write back patched boot sector
partitionDevice.WriteBlock(0, 1, bootSector.Data);
// Get the file size & number of sectors used
uint fileSize = fat.GetFileSize(location.DirectorySector, location.DirectorySectorIndex);
uint sectorCount = (fileSize + 511) >> 9;
uint[] sectors = new uint[65];
uint nsec = 0;
// Create list of the first 65 sectors of the file
for (uint cluster = location.FirstCluster; ((cluster != 0) & (nsec <= 64)); cluster = fat.GetNextCluster(cluster))
{
uint sec = fat.GetSectorByCluster(cluster);
for (uint s = 0; s < fat.SectorsPerCluster; s++)
sectors[nsec++] = sec + s;
}
// Read the first cluster of the file
Mosa.ClassLib.BinaryFormat firstCluster = new Mosa.ClassLib.BinaryFormat(fat.ReadCluster(location.FirstCluster));
uint patchArea = 0;
// Search for 0x3EB202FE (magic)
for (patchArea = 0; (firstCluster.GetUInt(patchArea) != 0x3EB202FE) && (patchArea < fat.ClusterSizeInBytes); patchArea += 4) ;
patchArea = patchArea + 8;
if (patchArea < fat.ClusterSizeInBytes)
{
// Set up the totals
firstCluster.SetUShort(patchArea, (ushort)(fileSize >> 2));
firstCluster.SetUShort(patchArea + 2, (ushort)(sectorCount - 1));
// Clear sector entries
firstCluster.Fill(patchArea + 8, 0, 64 * 4);
// Set sector entries
for (nsec = 0; nsec < 64; nsec++)
firstCluster.SetUInt(patchArea + 8 + (nsec * 4), sectors[nsec + 1]);
// Clear out checksum
firstCluster.SetUInt(patchArea + 4, 0);
// Write back the updated cluster
fat.WriteCluster(location.FirstCluster, firstCluster.Data);
// Re-Calculate checksum by openning the file
FatFileStream file = new FatFileStream(fat, location);
uint csum = 0x3EB202FE;
for (uint index = 0; index < (file.Length >> 2); index++)
{
uint value = (uint)file.ReadByte() | ((uint)file.ReadByte() << 8) | ((uint)file.ReadByte() << 16) | ((uint)file.ReadByte() << 24);
csum -= value;
}
// Set the checksum
firstCluster.SetUInt(patchArea + 4, csum);
// Write patched cluster back to disk
fat.WriteCluster(location.FirstCluster, firstCluster.Data);
}
}
}
if (imageFormat == ImageFormat.VHD)
{
// Create footer
byte[] footer = Mosa.DeviceSystem.VHD.CreateFooter(
blockCount,
(uint)(DateTime.Now - (new DateTime(2000, 1, 1, 0, 0, 0))).Seconds,
Guid.NewGuid().ToByteArray(),
diskGeometry
);
diskDevice.WriteBlock(blockCount, 1, footer);
}
Console.WriteLine("Completed!");
}
catch (Exception e)
{
Console.Error.WriteLine("Error: " + e.ToString());
return -1;
}
return 0;
}
private static void Main(string[] args)
{
// Create synthetic ram disk device
var ramDiskDevice = new RamDiskDevice(1024 * 1024 * 10 / 512);
// Create master boot block record
var mbr = new MasterBootBlock(ramDiskDevice);
mbr.DiskSignature = 0x12345678;
mbr.Partitions[0].Bootable = true;
mbr.Partitions[0].StartLBA = 17;
mbr.Partitions[0].TotalBlocks = ramDiskDevice.TotalBlocks - 17;
mbr.Partitions[0].PartitionType = PartitionType.FAT12;
mbr.Write();
// Create partition device
var partitionDevice = new PartitionDevice(ramDiskDevice, mbr.Partitions[0], false);
// Set FAT settings
var fatSettings = new FatSettings();
fatSettings.FATType = FatType.FAT12;
fatSettings.FloppyMedia = false;
fatSettings.VolumeLabel = "MOSADISK";
fatSettings.SerialID = new byte[4] { 0x01, 0x02, 0x03, 0x04 };
// Create FAT file system
var fat = new FatFileSystem(partitionDevice);
fat.Format(fatSettings);
if (fat.IsValid)
{
switch (fat.FATType)
{
case FatType.FAT12: Console.WriteLine("FAT12"); break;
case FatType.FAT16: Console.WriteLine("FAT16"); break;
case FatType.FAT32: Console.WriteLine("FAT32"); break;
default: Console.WriteLine("Unknown"); break;
}
Console.WriteLine(" Volume Name: " + fat.VolumeLabel);
}
else
{
Console.WriteLine("Unknown File System");
}
var files = new List<IncludeFile>();
files.Add(new IncludeFile("CREDITS.TXT", GetResource("CREDITS.txt")));
files.Add(new IncludeFile("LICENSE.TXT", GetResource("LICENSE.txt")));
foreach (var includeFile in files)
{
Console.WriteLine("Writing File: " + includeFile.Filename);
var fileAttributes = new FatFileAttributes();
if (includeFile.Archive) fileAttributes |= FatFileAttributes.Archive;
if (includeFile.ReadOnly) fileAttributes |= FatFileAttributes.ReadOnly;
if (includeFile.Hidden) fileAttributes |= FatFileAttributes.Hidden;
if (includeFile.System) fileAttributes |= FatFileAttributes.System;
string newname = (Path.GetFileNameWithoutExtension(includeFile.Filename).PadRight(8).Substring(0, 8) + Path.GetExtension(includeFile.Filename).PadRight(4).Substring(1, 3)).ToUpper();
var location = fat.CreateFile(newname, fileAttributes);
if (!location.IsValid)
throw new Exception("Unable to write file");
var fatFileStream = new FatFileStream(fat, location);
fatFileStream.Write(includeFile.Content, 0, includeFile.Content.Length);
fatFileStream.Flush();
Console.WriteLine(" Source Length: " + includeFile.Content.Length.ToString());
Console.WriteLine(" Stream Length: " + fatFileStream.Length.ToString());
}
foreach (var includeFile in files)
{
Console.WriteLine("Searching File: " + includeFile.Filename);
var location = fat.FindEntry(includeFile.Filename);
if (location.IsValid)
{
Console.WriteLine(" Found: " + includeFile.Filename);
var fatFileStream = new FatFileStream(fat, location);
Console.WriteLine(" Length: " + fatFileStream.Length.ToString());
for (;;)
{
int i = fatFileStream.ReadByte();
if (i < 0)
break;
Console.Write((char)i);
}
Console.WriteLine();
fatFileStream.Position = 0;
var buffer = new byte[fatFileStream.Length];
fatFileStream.Read(buffer, 0, (int)fatFileStream.Length);
Console.WriteLine(System.Text.Encoding.UTF8.GetString(buffer));
}
else
{
Console.WriteLine(" Not Found: " + includeFile.Filename);
}
}
return;
}
/// <summary>
/// Start the Device Driver System.
/// </summary>
public static void Start()
{
// Find all drivers
Boot.Console.Write("Finding Drivers...");
deviceDriverRegistry.RegisterBuiltInDeviceDrivers();
var count = deviceDriverRegistry.GetPCIDeviceDrivers().Count + deviceDriverRegistry.GetISADeviceDrivers().Count;
Boot.Console.WriteLine("[Completed: " + count.ToString() + " found]");
// Start drivers for ISA devices
StartISADevices();
// Start drivers for PCI devices
StartPCIDevices();
// Get CMOS, StandardKeyboard, and PIC driver instances
CMOS = (CMOS)deviceManager.GetDevices(new FindDevice.WithName("CMOS")).First.Value;
StandardKeyboard = (StandardKeyboard)deviceManager.GetDevices(new FindDevice.WithName("StandardKeyboard")).First.Value;
Boot.Console.Write("Finding disk controllers...");
var diskcontroller = new DiskControllerManager(Setup.DeviceManager);
diskcontroller.CreateDiskDevices();
var diskcontrollers = deviceManager.GetDevices(new FindDevice.IsDiskControllerDevice());
Boot.Console.WriteLine("[Completed: " + diskcontrollers.Count.ToString() + " found]");
foreach (var device in diskcontrollers)
{
Boot.Console.Write("Found controller ");
Boot.InBrackets(device.Name, Mosa.Kernel.x86.Colors.White, Mosa.Kernel.x86.Colors.LightGreen);
Boot.Console.WriteLine();
}
Boot.Console.Write("Finding disks...");
var disks = deviceManager.GetDevices(new FindDevice.IsDiskDevice());
Boot.Console.WriteLine("[Completed: " + disks.Count.ToString() + " found]");
foreach (var disk in disks)
{
Boot.Console.Write("Spinning up disk ");
Boot.InBrackets(disk.Name, Mosa.Kernel.x86.Colors.White, Mosa.Kernel.x86.Colors.LightGreen);
Boot.Console.Write(" " + (disk as IDiskDevice).TotalBlocks.ToString() + " blocks");
Boot.Console.WriteLine();
}
partitionManager.CreatePartitionDevices();
Boot.Console.Write("Finding partitions...");
var partitions = deviceManager.GetDevices(new FindDevice.IsPartitionDevice());
Boot.Console.WriteLine("[Completed: " + partitions.Count.ToString() + " found]");
foreach (var partition in partitions)
{
Boot.Console.Write("Opening partition: ");
Boot.InBrackets(partition.Name, Mosa.Kernel.x86.Colors.White, Mosa.Kernel.x86.Colors.LightGreen);
Boot.Console.Write(" " + (partition as IPartitionDevice).BlockCount.ToString() + " blocks");
Boot.Console.WriteLine();
}
Boot.Console.Write("Finding file systems...");
var filesystem = deviceManager.GetDevices(new FindDevice.IsPartitionDevice());
//Boot.Console.WriteLine("[Completed: " + filesystem.Count.ToString() + " found]");
foreach (var partition in partitions)
{
var fat = new FatFileSystem(partition as IPartitionDevice);
if (fat.IsValid)
{
Boot.Console.WriteLine("Found a FAT file system!");
var filename = "TEST.TXT";
var location = fat.FindEntry(filename);
if (location.IsValid)
{
Boot.Console.WriteLine("Found: " + filename);
var fatFileStream = new FatFileStream(fat, location);
uint len = (uint)fatFileStream.Length;
Boot.Console.WriteLine("Length: " + len.ToString());
Boot.Console.WriteLine("Reading File:");
for (;;)
{
int i = fatFileStream.ReadByte();
if (i < 0)
break;
Boot.Console.Write((char)i);
}
}
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="FatFileStream"/> class.
/// </summary>
/// <param name="fs">The fs.</param>
/// <param name="location">The location.</param>
public FatFileStream(FatFileSystem fs, FatFileLocation location)
: this(fs, location.FirstCluster, location.DirectorySector, location.DirectorySectorIndex)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="FatFileStream"/> class.
/// </summary>
/// <param name="fs">The fs.</param>
/// <param name="startCluster">The start cluster.</param>
/// <param name="directorySector">The directory sector.</param>
/// <param name="directorySectorIndex">Index of the directory sector.</param>
public FatFileStream(FatFileSystem fs, uint startCluster, uint directorySector, uint directorySectorIndex)
{
this.fs = fs;
this.clusterSize = fs.ClusterSizeInBytes;
this.data = new byte[clusterSize];
this.startCluster = startCluster;
this.directorySector = directorySector;
this.directorySectorIndex = directorySectorIndex;
this.read = true;
this.write = true;
this.position = 0;
this.dirty = false;
this.nthCluster = System.UInt32.MaxValue; // Not positioned yet
this.lengthOnDisk = fs.GetFileSize(directorySector, directorySectorIndex);
this.length = this.lengthOnDisk;
currentCluster = 0;
}
