feat: gracefully shut down on SIGINT/SIGTERM on Linux/mac (#6053)

src/util/UnixSignalHandler.hpp

@@ -0,0 +1,34 @@
+#pragma once
+
+#include <QtGlobal>
+
+#if defined(Q_OS_UNIX)
+#    include <QObject>
+#    include <QSocketNotifier>
+
+#    include <array>
+
+namespace chatterino {
+
+class UnixSignalHandler : public QObject
+{
+    Q_OBJECT
+
+public:
+    UnixSignalHandler(int signal);
+
+    static void fired(int signal);
+
+Q_SIGNALS:
+    void signalFired();
+
+private:
+    void handleSignal();
+
+    std::array<int, 2> fd{};
+    QSocketNotifier *socketNotifier;
+};
+
+}  // namespace chatterino
+
+#endif