Auto-restart on unexpected failure

electron.js

@@ -18,6 +18,7 @@ let mainContextWindow;
 let mainWindow;
 let mainWindowTray;
 let mountedPIDs = [];
+let expectedUnmount = {};
 
 function createWindow() {
   // Create the browser window.
@@ -260,6 +261,15 @@ ipcMain.on(Constants.IPC_Detect_Mounts, (event, data) => {
         siaPrimeLocation = siaPrimeLocation.toUpperCase();
         grabDriveLetters(hsLocation, siaLocation, siaPrimeLocation);
       }
+      if (results.Hyperspace.PID !== -1) {
+        expectedUnmount['Hyperspace'] = false;
+      }
+      if (results.Sia.PID !== -1) {
+        expectedUnmount['Sia'] = false;
+      }
+      if (results.SiaPrime.PID !== -1) {
+        expectedUnmount['SiaPrime'] = false;
+      }
       setImage(hsLocation, siaLocation, siaPrimeLocation);
       standardIPCReply(event, Constants.IPC_Detect_Mounts_Reply, {
         DriveLetters: driveLetters,
@@ -417,10 +427,13 @@ ipcMain.on(Constants.IPC_Install_Upgrade, (event, data) => {
 });
 
 ipcMain.on(Constants.IPC_Mount_Drive, (event, data) => {
+  expectedUnmount[data.StorageType] = false;
   const dataDirectory = helpers.resolvePath(data.Directory);
   const errorHandler = (pid, error) => {
     mountedPIDs.splice(mountedPIDs.indexOf(pid), 1);
     standardIPCReply(event, Constants.IPC_Unmount_Drive_Reply, {
+      Expected: expectedUnmount[data.StorageType],
+      Location: data.Location,
       PID: -1,
       StorageType: data.StorageType,
     }, error || Error(data.StorageType + ' Unmounted'));
@@ -473,6 +486,7 @@ ipcMain.on(Constants.IPC_Shutdown, () => {
 });
 
 ipcMain.on(Constants.IPC_Unmount_Drive, (event, data) => {
+  expectedUnmount[data.StorageType] = true;
   helpers
     .stopProcessByPID(data.PID)
     .then((pid)=> {