ref: 150ee7fe6eea076c1c5daac8d7d2e5f63d8ffd2c dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*)