Dictate a routing table for a hostname on the network

dictate.sh

#!/bin/bash

HOST=$1
TABLE=$2
IP=$(getent hosts $HOST | cut -d \  -f 1)
CURRENT=$(ip rule | grep $IP | cut -d \  -f 4)
PRIORITY=1000

if [ $CURRENT ]; then
  echo Resetting rule for $HOST with IP $IP
  ip rule del from $IP
fi

if [ $TABLE ]; then
  echo Setting rule for $HOST with IP $IP to table $TABLE
  ip rule add from $IP table $TABLE prio $PRIORITY
fi