daemon: add tuxclocker DBus service file

src/tuxclockerd/meson.build

@@ -21,3 +21,11 @@ executable('tuxclockerd',
 	dependencies : qt5_dep,
 	link_with : libtuxclocker,
 	install : true)
+
+# DBus data directory
+
+dbus_data_dir = join_paths(get_option('prefix'), get_option('datadir'), 'dbus-1')
+
+dbus_system_services_dir = join_paths(dbus_data_dir, 'system.d')
+
+install_data('org.tuxclocker.conf', install_dir : dbus_system_services_dir)

src/tuxclockerd/org.tuxclocker.conf

@@ -0,0 +1,19 @@
+ <!DOCTYPE busconfig PUBLIC
+ "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
+ "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
+<busconfig>
+
+  <!-- Only user root can own the daemon-->
+  <policy user="root">
+    <allow own="org.tuxclocker"/>
+  </policy>
+
+  <!-- Allow anyone to call into the service-->
+  <policy context="default">
+    <allow send_interface="org.tuxclocker"/>
+    <allow send_destination="org.tuxclocker"/>
+    <allow receive_sender="org.tuxclocker"/>
+    <allow receive_interface="org.tuxclocker"/>
+  </policy>
+
+</busconfig>