ENV{ID_PATH}=="?*", ENV{ID_PORT}=="", SYMLINK+="serial/by-path/$env{ID_PATH}"
ENV{ID_PATH}=="?*", ENV{ID_PORT}=="?*", SYMLINK+="serial/by-path/$env{ID_PATH}-port$env{ID_PORT}"
ENV{ID_PATH}=="?*", ENV{ID_PORT}=="", SYMLINK+="serial/by-path/$env{ID_PATH}"
ENV{ID_PATH}=="?*", ENV{ID_PORT}=="?*", SYMLINK+="serial/by-path/$env{ID_PATH}-port$env{ID_PORT}"