ref: 29bef5a7f30fb237b1e3ea5fac1be2eb1d2cf5cd dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*):?