add: added os process signals support

Build.Counter

@@ -1 +1 @@
-3154
+3155

src/main.cpp

@@ -7,6 +7,7 @@
 #include <QStyleFactory>
 #include <QApplication>
 #include <singleapplication.h>
+#include <csignal>
 #include "w_MainWindow.hpp"
 #include "QvCore/QvCommandLineArgs.hpp"
 
@@ -17,6 +18,20 @@
 
 bool isDebug = false;
 
+
+void signalHandler(int signum)
+{
+    cout << "Interrupt signal (" << signum << ") received." << endl;
+
+    if (MainWindow::mwInstance && MainWindow::mwInstance->vinstance) {
+        cout << "Trying to stop connection..." << endl;
+        MainWindow::mwInstance->vinstance->StopConnection();
+    }
+
+    exit(signum);
+}
+
+
 bool verifyConfigAvaliability(QString path, bool checkExistingConfig)
 {
     // Does not exist.
@@ -196,6 +211,12 @@ bool initialiseQv2ray()
 
 int main(int argc, char *argv[])
 {
+    // Register signal handlers.
+    signal(SIGINT, signalHandler);
+    signal(SIGHUP, signalHandler);
+    signal(SIGKILL, signalHandler);
+    signal(SIGTERM, signalHandler);
+    //
     // parse the command line before starting as a Qt application
     {
         std::unique_ptr<QCoreApplication> consoleApp(new QCoreApplication(argc, argv));
@@ -441,6 +462,12 @@ int main(int argc, char *argv[])
         QObject::connect(&_qApp, &QGuiApplication::commitDataRequest, []() {
             LOG(MODULE_INIT, "Quit triggered by session manager.");
         });
+        signal(SIGUSR1, [](int) {
+            emit MainWindow::mwInstance->Connect();
+        });
+        signal(SIGUSR2, [](int) {
+            emit MainWindow::mwInstance->DisConnect();
+        });
         auto rcode = _qApp.exec();
         LOG(MODULE_INIT, "Quitting normally")
         return rcode;

src/ui/w_MainWindow.cpp

@@ -196,6 +196,7 @@ MainWindow::MainWindow(QWidget *parent):
     // Share options
     connect(action_RCM_ShareQR, &QAction::triggered, this, &MainWindow::on_action_RCM_ShareQR_triggered);
     //
+    // Globally invokable signals.
     connect(this, &MainWindow::Connect, this, &MainWindow::on_startButton_clicked);
     connect(this, &MainWindow::DisConnect, this, &MainWindow::on_stopButton_clicked);
     connect(this, &MainWindow::ReConnect, this, &MainWindow::on_reconnectButton_clicked);