static void CreateOSOnDisk(DiskDriver disk)
{
// create the operating system on disk if not present
disk.TurnOn();
// try to mount the disk, format if needed first
FileSystem filesystem = new SimpleFS();
try
{
filesystem.Mount(disk, "/");
}
catch (Exception)
{
filesystem.Format(disk);
filesystem.Mount(disk, "/");
}
Directory rootDir = filesystem.GetRootDirectory();
// password file for security subsystem if not present
if (filesystem.Find("/passwd") == null)
{
rootDir.CreateFile("passwd");
}
// user home directory and files if not present
if (filesystem.Find("/home") == null)
{
rootDir.CreateDirectory("home");
}
// root user if not present
SecuritySystem security = new SimpleSecurity(filesystem, "passwd");
try
{
security.AddUser("root");
}
catch (Exception)
{
}
disk.TurnOff();
}
static void TestLogicalFileSystem()
{
try
{
DiskDriver disk = new VolatileDisk(1);
//DiskDriver disk = new PersistentDisk(1, "disk1");
disk.TurnOn();
FileSystem fs = new SimpleFS();
fs.Format(disk);
fs.Mount(disk, "/");
Directory root = fs.GetRootDirectory();
Directory dir1 = root.CreateDirectory("dir1");
Directory dir2 = root.CreateDirectory("dir2");
Random r = new Random();
byte[] bytes1 = CreateTestBytes(r, 1000);
File file2 = dir2.CreateFile("file2");
FileStream stream1 = file2.Open();
stream1.Write(0, bytes1);
stream1.Close();
File file2_2 = (File)fs.Find("/dir2/file2");
FileStream stream2 = file2_2.Open();
byte[] bytes2 = stream2.Read(0, 1000);
stream2.Close();
if (!Compare(bytes1, bytes2))
{
throw new Exception("bytes read were not the same as written");
}
ValidateBadPath(fs, "");
ValidateBadPath(fs, "//");
ValidateBadPath(fs, "/dir2/nope");
ValidateBadPath(fs, "dir2");
ValidateBadPath(fs, "nope");
ValidateBadPath(fs, "/dir2/file2/nope");
ValidatePath(fs, "/");
ValidatePath(fs, "/dir2");
ValidatePath(fs, "/dir1/");
Console.WriteLine("Printing all directories...");
RecursivelyPrintDirectories(root);
Console.WriteLine();
Console.WriteLine("Moving file2 to dir1...");
file2.Move(dir1);
Console.WriteLine("Printing all directories...");
RecursivelyPrintDirectories(root);
Console.WriteLine();
Console.WriteLine("Renaming dir2 to renamed...");
dir2.Rename("renamed");
Console.WriteLine("Printing all directories...");
RecursivelyPrintDirectories(root);
Console.WriteLine();
Console.WriteLine("Deleting renamed...");
dir2.Delete();
Console.WriteLine("Printing all directories...");
RecursivelyPrintDirectories(root);
Console.WriteLine();
Console.WriteLine("Deleting dir1...");
dir1.Delete();
Console.WriteLine("Printing all directories...");
RecursivelyPrintDirectories(root);
Console.WriteLine();
fs.Unmount("/");
disk.TurnOff();
Console.WriteLine("Logical file system success!");
}
catch (Exception ex)
{
Console.WriteLine("LFS test failed: " + ex.Message);
Console.WriteLine(ex.StackTrace);
}
}
