Plan 9 from Bell Labs’s /usr/web/sources/contrib/quanstro/root/rc/bin/etheroui
#!/bin/rc rfork e for(i){ i=`{echo $i| tr 'A-Z' 'a-z' | sed 's/[^a-f0-9]//g s/(......).*/\1/g'} look $i /lib/oui }