Bash find ip with timeout

findip.sh

#!/bin/bash

TIMEOUTSEC=10

function findIP {
  startTime=$(date +%s)
  ip=$(ifconfig | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*' | grep -v '127.0.0.1')
  iplen=${#ip}
  elapsedTime=$(( $(date +%s) - startTime ))
  echo "Checking for IPv4 address..."

  while [ $iplen -eq 0 ] && [ $elapsedTime -lt $TIMEOUTSEC ]
  do
    ip=$(ifconfig | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*' | grep -v '127.0.0.1')
    iplen=${#ip}
    elapsedTime=$(( $(date +%s) - startTime ))
  done

  if [ $iplen -eq 0 ]
  then
    echo "Unable to find ip in $TIMEOUTSEC seconds"
  else
    echo "Your IP is $ip"
  fi
  
}

sleep 20s
findIP