ref: 0e96fd0197e0ce8d4e69cb1e0dc96dcfb4bb3a1e dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*)