Add verbose command line option

service/report-daemon.cpp

@@ -315,10 +315,33 @@ on_signal_quit(gpointer)
 }
 
 int
-main(void)
+main(int argc, char *argv[])
 {
     Gio::init();
 
+    {
+        bool verbose = false;
+        Glib::OptionEntry opt_v;
+        opt_v.set_short_name('v');
+        opt_v.set_long_name("verbose");
+        opt_v.set_description("Produce debugging output");
+
+        Glib::OptionGroup options{"OPTIONS", "Program options"};
+        options.add_entry(opt_v, verbose);
+
+        Glib::OptionContext context;
+        context.set_help_enabled();
+        context.set_main_group(options);
+
+        if (!context.parse(argc, argv)) {
+            errx(EXIT_FAILURE, "Invalid command line arguments");
+        }
+
+        if (verbose) {
+            Glib::setenv("G_MESSAGES_DEBUG", "all");
+        }
+    }
+
     { /* Test availability of Session bus */
         try {
             auto connection = Gio::DBus::Connection::get_sync(Gio::DBus::BusType::BUS_TYPE_SESSION);