ref: 7cdd1c46c5bb29572c69cbf2dcff3fba6a4a7a1d dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*)