netmenu_static_onoff

#!/bin/bash

[ -z "$1" -o -z "$2" ] && echo "iface action" && exit 0

if [[ "$2" == "up" ]]; then
  sed -i -r "s/iface $1.*$/iface $1 inet static/" /etc/network/interfaces
  sed -i "/iface $1/!b;:x;n;s/^#\+//;/^$/b;bx" /etc/network/interfaces
  echo -n "Enter new address: "
  read new_address
  echo -n "Enter new netmask: "
  read new_netmask
  echo -n "Enter new gateway: "
  read new_gateway
  echo -n "Enter new DNS1: "
  read dns1
  echo -n "Enter new DNS2: "
  read dns2
  if [[ $new_address ]]; then
    sed -i -r "/iface $1/!b;:x;n;s/address.*/address $new_address/;t;/iface/b;bx" /etc/network/interfaces
  fi
  if [[ $new_netmask ]]; then
    sed -i -r "/iface $1/!b;:x;n;s/netmask.*/netmask $new_netmask/;t;/iface/b;bx" /etc/network/interfaces
  fi
  if [[ $new_gateway ]]; then
  sed -i -r "/iface $1/!b;:x;n;s/gateway.*/gateway $new_gateway/;t;/iface/b;bx" /etc/network/interfaces
  fi
  #sed -i "/$2 $3/s/^#\+//" ~/interfaces
  #temporary parm
  if [[ -z `cat /etc/network/interfaces | grep $1` && $new_address && $new_netmask && $new_gateway ]]; then
    ifdown $1
    ip addr add $new_address/$new_netmask dev $1 label $1
    ip route add default via $new_gateway  dev $1 onlink
  else
    ifdown $1
    ifup $1
  fi
  #temporary dns
  if [ "$dns1" ]; then
    echo -e "nameserver $dns1" > /etc/resolv.conf
    if [ "$dns2" ]; then
      echo -e "nameserver $dns2" >> /etc/resolv.conf
    fi
  #else echo "" > /etc/resolv.conf
  fi
fi
if [[ "$2" == "down" ]]; then
  if [[ -z `cat /etc/network/interfaces | grep $1` ]]; then
    ip route del default  dev $1 2>&1 1>/dev/null || true
    ip -4 addr flush dev $1
    ip link set dev $1 down
    echo "" > /etc/resolve.conf
  else
    ifdown $1
    #echo "" > /etc/resolve.conf
  fi
fi
exit 0