daemonize the server

src/meson.build

@@ -1,7 +1,9 @@
 server_dependencies = [
 	dependency('glib-2.0'),
+	dependency('gio-unix-2.0'),
 	dependency('gtk+-3.0', version: '>=3.0.0'),
-	meson.get_compiler('c').find_library('m', required: true)
+	meson.get_compiler('c').find_library('m', required: true),
+	meson.get_compiler('vala').find_library('posix')
 ]
 
 # if not always authenticated then polkit will be used for authentication

src/server-main.vala

@@ -21,6 +21,19 @@ namespace TUFManager {
 	 * and handling root related tasks
 	 */
 	namespace Server {
+		private static bool foreground = false;
+
+		private const OptionEntry[] options = {
+			{ "foreground", 'f', 0, OptionArg.NONE, ref foreground, N_ ("Run the daemon in the foreground"), null },
+			{ null }
+		};
+
+		private static void on_exit (int signum) {
+			if (loop != null) {
+				loop.quit ();
+			}
+		}
+
 		/**
 		 * The entry point to the server launches a system dbus daemon
 		 *
@@ -28,16 +41,60 @@ namespace TUFManager {
 		 * @return Returns 0 on success
 		 */
 		public static int main (string[] args) {
+			Intl.setlocale (LocaleCategory.ALL, "");
+			Intl.bindtextdomain (GETTEXT_PACKAGE, "/usr/share/locale");
+			Intl.bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+			Intl.textdomain (GETTEXT_PACKAGE);
+
+			try {
+				var opt_context = new OptionContext ("");
+				opt_context.set_translation_domain (GETTEXT_PACKAGE);
+				opt_context.set_help_enabled (true);
+				opt_context.add_main_entries (options, null);
+				opt_context.parse (ref args);
+			}
+			catch (OptionError e) {
+				print (_ ("Error: %s\n"), e.message);
+				print (_ ("Run '%s --help' to see a full list of available command line options.\n"), args[0]);
+				return 1;
+			}
+
+			if (!foreground) {
+				var pid = Posix.fork ();
+				if (pid < 0) {
+					Posix.exit (Posix.EXIT_FAILURE);
+				}
+				else if (pid > 0) {
+					Posix.exit (Posix.EXIT_SUCCESS);
+				}
+
+				Posix.umask (0);
+
+				var sid = Posix.setsid ();
+				if (sid < 0) {
+					Posix.exit (Posix.EXIT_FAILURE);
+				}
+
+				if (Posix.chdir ("/") < 0) {
+					Posix.exit (Posix.EXIT_FAILURE);
+				}
+			}
+
+			Process.signal(ProcessSignal.INT, on_exit);
+			Process.signal(ProcessSignal.TERM, on_exit);
+
 			Bus.own_name (BusType.SYSTEM,
 				"org.tuf.manager.server",
 				BusNameOwnerFlags.NONE,
 				on_bus_acquired,
 				() => {},
 				() => {
-					stderr.printf ("Could not acquire name\n");
+					stderr.printf (_ ("Could not acquire bus name\n"));
 				});
+
 			loop = new MainLoop ();
 			loop.run ();
+
 			return 0;
 		}
 	}

src/server.vala

@@ -28,7 +28,7 @@ namespace TUFManager {
 		/**
 		 * The loop of the dbus daemon running in the background
 		 */
-		MainLoop loop;
+		MainLoop? loop = null;
 
 		/**
 		 * Register the bus after the name has been aquired
@@ -47,7 +47,9 @@ namespace TUFManager {
 			}
 			catch (IOError e) {
 				stderr.printf ("Could not register service\n");
-				loop.quit ();
+				if (loop != null) {
+					loop.quit ();
+				}
 			}
 		}