tag:
type: txt
help: "Ethernet interface name"
syntax: exec " \
        if [ -z \"`ip addr | grep $(@) `\" ]; then \
          echo ethernet interface $(@) doesn\\'t exist on this system ; \
          exit 1 ; \
        fi ; "
#allowed: local -a array ;
# array=( /sys/class/net/{eth,vmnet}* ) ;
# echo -n ${array[@]##*/}