private static void On(OpenCommand command)
{
int handle = fileSystem.Open(command.LogicalName);
WriteSuccessLine(string.Format("file {0} opened, index={1}", command.LogicalName, handle));
}
public override bool TryBuildCommand(string[] args, out object command)
{
var op = (command = new OpenCommand()) as OpenCommand;
return RequireLogicalName(args, 0, out op.LogicalName);
}