#!/bin/sh

PREREQS="union-mount"

prereqs() { echo "$PREREQS"; }

case $1 in
  prereqs)
  prereqs
    exit 0
    ;;
esac

# Extract kernel parameters
set -- $(cat /proc/cmdline)
for x in "$@"; do
   case "$x" in
        mgmt-intf-dhcp=*)
            val="${x#mgmt-intf-dhcp=}"

            if [ -z "$val" ]; then
                echo "ERROR: mgmt-intf-dhcp value (on/off) not specified !"
                exit 0
            fi

            if [ -e "${rootmnt}/etc/network/interfaces" ]; then
                if [ "$val" = "off" ]; then
                    sed -i 's/iface eth0 inet dhcp/iface eth0 inet static/g' ${rootmnt}/etc/network/interfaces
                elif [ "$val" = "on" ]; then
                    sed -i 's/iface eth0 inet static/iface eth0 inet dhcp/g' ${rootmnt}/etc/network/interfaces
                fi
            fi
            
            ;;        
    esac
done