+
+c) An optional udev rule to give you a persistent value to use in
+host_usb_dev_node. For example:
+
+IMPORT{builtin}="path_id"
+ENV{ID_PATH}=="?*", ENV{.ID_PORT}=="", SYMLINK+="bus/usb/by-path/$env{ID_PATH}"
+ENV{ID_PATH}=="?*", ENV{.ID_PORT}=="?*", SYMLINK+="bus/usb/by-path/$env{ID_PATH}-port$env{.ID_PORT}"