#!/bin/sh

xNIF=""
xNETWORK_INTERFACE=""

CMDLINE=`cat /proc/cmdline`

for i in $CMDLINE; do
    case $i in
        media=*)  MEDIA=${i#*=} ;;
        xNIF=*)  INT0=${i#*=} ;;  
        xNETWORK_INTERFACE=*)  INT1=${i#*=} ;; 
    esac
done

if [ "$MEDIA" = "network" ]; then
    if [ "$INT0" != "" ]; then       
        echo $INT0
        exit 0
    fi
    if [ "$INT1" != "" ]; then
        echo $INT1
        exit 0
    fi
    for i in eth0 eth1 eth2 eth3
    do
       ip addr show $i 2>/dev/null | grep -q "inet "
       if [ $? -eq 0 ]; then
          echo $i
          exit 0
       fi
    done
fi  
  
echo "none"
exit 0
