VirtualComputer/src/sznp/virtualcomputer/MCFrameBuffer.java

@@ -15,7 +15,7 @@ public class MCFrameBuffer implements IFramebuffer {
 	private IDisplay display;
 	private Holder<IDisplaySourceBitmap> holder = new Holder<>();
 
-	public MCFrameBuffer(IDisplay display) {
+	public MCFrameBuffer(IDisplay display, boolean VBoxDirect) { //TODO: Implement param
 		this.display = display;
 	}
 

VirtualComputer/src/sznp/virtualcomputer/PluginMain.java

@@ -3,6 +3,7 @@ package sznp.virtualcomputer;
 import com.google.common.collect.Lists;
 import jnr.ffi.LibraryLoader;
 import org.bukkit.Bukkit;
+import org.bukkit.ChatColor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.ConsoleCommandSender;
 import org.bukkit.plugin.java.JavaPlugin;
@@ -117,7 +118,8 @@ public class PluginMain extends JavaPlugin {
 
 	public void Start(CommandSender sender) {// TODO: Add touchscreen support (#2)
 		Bukkit.getScheduler().runTaskAsynchronously(this, () -> {
-			sender.sendMessage("§eStarting computer...");
+			try {
+				sendMessage(sender, "§eStarting computer...");
 				if (machine == null)
 					machine = vbox.getMachines().get(0);
 				session.setName("minecraft");
@@ -133,7 +135,30 @@ public class PluginMain extends JavaPlugin {
 						final IConsole console = session.getConsole();
 						console.powerUp(); // https://marc.info/?l=vbox-dev&m=142780789819967&w=2
 						console.getDisplay().attachFramebuffer(0L,
-							new IFramebuffer(new MCFrameBuffer(console.getDisplay())));
+								new IFramebuffer(new MCFrameBuffer(console.getDisplay(), true)));
+						startScreenTask(console, sender);
+					}
+				};
+				Bukkit.getScheduler().runTaskLaterAsynchronously(this, tr, 5);
+			} catch (VBoxException e) {
+				if (e.getResultCode() == 0x80070005) { //lockMachine: "The object functionality is limited"
+					sendMessage(sender, "§6Cannot start computer, the machine may be inaccessible");
+					return; //TODO: If we have VirtualBox open, it won't close the server's port
+					//TODO: Can't detect if machine fails to start because of hardening issues
+					//TODO: This error also occurs if the machine has failed to start at least once (always reassign the machine?)
+					//machine.launchVMProcess(session, "headless", "").waitForCompletion(10000); //No privileges, start the 'old' way
+					//session.getConsole().getDisplay().attachFramebuffer(0L, new IFramebuffer(new MCFrameBuffer(session.getConsole().getDisplay(), false)));
+					//sendMessage(sender, "§6Computer started with slower screen. Run as root to use a faster method.");
+				} else {
+					sendMessage(sender, "§cFailed to start computer: " + e.getMessage());
+					return;
+				}
+			}
+			sendMessage(sender, "§eComputer started.");
+		});
+	}
+
+	private void startScreenTask(IConsole console, CommandSender sender) {
 		if (screenupdatetask == null)
 			screenupdatetask = Bukkit.getScheduler().runTaskTimerAsynchronously(PluginMain.this, () -> {
 				if (session.getState().equals(SessionState.Locked) // Don't run until the machine is running
@@ -144,36 +169,35 @@ public class PluginMain extends JavaPlugin {
 						|| console.getState().equals(MachineState.Saved)) {
 					if (session.getState().equals(SessionState.Locked)) {
 						session.unlockMachine();
-									sender.sendMessage("Computer powered off, released it.");
+						sendMessage(sender, "Computer powered off, released it.");
 					}
 					screenupdatetask.cancel();
 					screenupdatetask = null;
 				}
 			}, 100, 100); // Do a full update every 5 seconds
-					sender.sendMessage("§eComputer started.");
 	}
-			};
+
-			Bukkit.getScheduler().runTaskLaterAsynchronously(this, tr, 5);
+	private void sendMessage(CommandSender sender, String message) {
-		});
+		sender.sendMessage(message);
+		getLogger().warning(sender.getName() + ": " + ChatColor.stripColor(message));
 	}
 
 	public void Stop(CommandSender sender) {
 		if (checkMachineNotRunning(sender)) {
 			if (session.getState().equals(SessionState.Locked)) {
 				session.unlockMachine();
-				sender.sendMessage("§eComputer powered off, released it.");
+				sendMessage(sender, "§eComputer powered off, released it.");
 			}
 			return;
 		}
-		sender.sendMessage("§eStopping computer...");
+		sendMessage(sender, "§eStopping computer...");
 		session.getConsole().powerDown().waitForCompletion(2000);
 		session.unlockMachine();
-		sender.sendMessage("§eComputer stopped.");
+		sendMessage(sender, "§eComputer stopped.");
 	}
 
 	public void PowerButton(CommandSender sender) {
-		sender.sendMessage("§ePressing powerbutton...");
+		sendMessage(sender, "§ePressing powerbutton...");
-		final CommandSender s = sender;
 		getServer().getScheduler().runTaskAsynchronously(this, new Runnable() {
 			@Override
 			public void run() {
@@ -181,7 +205,7 @@ public class PluginMain extends JavaPlugin {
 					Start(sender);
 				} else {
 					session.getConsole().powerButton();
-					s.sendMessage("§ePowerbutton pressed.");
+					sendMessage(sender, "§ePowerbutton pressed.");
 				}
 			}
 		});
@@ -190,18 +214,18 @@ public class PluginMain extends JavaPlugin {
 	public void Reset(CommandSender sender) {
 		if (checkMachineNotRunning(sender))
 			return;
-		sender.sendMessage("§eResetting computer...");
+		sendMessage(sender, "§eResetting computer...");
 		session.getConsole().reset();
-		sender.sendMessage("§eComputer reset.");
+		sendMessage(sender, "§eComputer reset.");
 	}
 
 	public void FixScreen(CommandSender sender) {
 		if (checkMachineNotRunning(sender))
 			return;
-		sender.sendMessage("§eFixing screen...");
+		sendMessage(sender, "§eFixing screen...");
 		session.getConsole().getDisplay().setSeamlessMode(false);
 		session.getConsole().getDisplay().setVideoModeHint(0L, true, false, 0, 0, 640L, 480L, 32L);
-		sender.sendMessage("§eScreen fixed.");
+		sendMessage(sender, "§eScreen fixed.");
 	}
 
 	public boolean checkMachineNotRunning(@Nullable CommandSender sender) {