fixed #43, workaround relaunch to keep privilege for child process

src/main/app.ts

@@ -18,6 +18,7 @@ import * as semver from 'semver';
 import * as fs from 'fs';
 import {
   clearSession,
+  customRelaunch,
   getAppDir,
   getBundledPythonEnvPath,
   getBundledPythonPath,
@@ -838,6 +839,9 @@ export class JupyterApplication implements IApplication, IDisposable {
     );
 
     this._evm.registerEventHandler(EventTypeMain.RestartApp, _event => {
+      if (process.platform === 'linux') {
+        app.relaunch = customRelaunch;
+      }
       app.relaunch();
       app.quit();
     });

src/main/utils.ts

@@ -8,6 +8,7 @@ import log from 'electron-log';
 import { AddressInfo, createServer, Socket } from 'net';
 import { app, nativeTheme } from 'electron';
 import { IPythonEnvironment } from './tokens';
+import { spawn } from 'child_process';
 
 export const DarkThemeBGColor = '#212121';
 export const LightThemeBGColor = '#ffffff';
@@ -283,3 +284,19 @@ export function getLogFilePath(processType: 'main' | 'renderer' = 'main') {
       );
   }
 }
+
+export function customRelaunch(): void {
+  const script = `while kill -0 ${process.pid} 2>/dev/null; do
+    sleep 0.1
+    done
+    ${process.argv.join(' ')} & disown
+    exit
+  `;
+  spawn('sh', ['-c', `"${script}"`], {
+    shell: true,
+    detached: true,
+    stdio: 'ignore'
+  });
+  // Exit the parent process
+  process.exit();
+}