gistfile1.txt

bash-3.2# networksetup -listnetworkserviceorder | awk -F': ' '/Ethernet,/ {gsub(/\)/,"");print $3}'
bash-3.2# networksetup -listnetworkserviceorder
An asterisk (*) denotes that a network service is disabled.
(1) Ethernet 1
(Hardware Port: Ethernet 1, Device: en0)

(*) Ethernet 2
(Hardware Port: Ethernet 2, Device: en1)

(*) Built-in Serial Port (1)
(Hardware Port: Built-in Serial Port (1), Device: serial)

(*) FireWire
(Hardware Port: FireWire, Device: fw0)

bash-3.2# networksetup -listnetworkserviceorder | awk -F': ' '/Ethernet,/ {gsub(/\)/,"");print $3}'


bash-3.2# networksetup -listnetworkserviceorder | awk -F': ' '/Ethernet*/ {gsub(/\)/,"");print $3}'

en0

en1
bash-3.2#