-extern int udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value);
-extern int udev_device_add_property_from_string(struct udev_device *udev_device, const char *property);
+extern void udev_device_cleanup_devlinks_list(struct udev_device *udev_device);
+extern struct udev_list_entry *udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value);
+extern struct udev_list_entry *udev_device_add_property_from_string(struct udev_device *udev_device, const char *property);
+extern char **udev_device_get_properties_envp(struct udev_device *udev_device);
+extern int udev_device_read_db(struct udev_device *udev_device);
+extern int udev_device_read_uevent_file(struct udev_device *udev_device);