+gboolean ghb_preset_is_custom(void);
+void ghb_prefs_store(void);
+void ghb_pref_set(GValue *settings, const gchar *key);
+gboolean ghb_lock_file(const gchar *name);
+void ghb_refresh_preset(signal_user_data_t *ud);
+int ghb_find_pid_file();
+void ghb_unlink_pid_file(int pid);
+void ghb_write_pid_file();