Get IP and MAC Addy from *unix

dump_ip.sh

#!/bin/bash

LIMIT=90  # wait 90 increments
a=0
# wait until network has connection (eval to 0 when connected)
while ! ifconfig en0 | grep -F 'inet' > /dev/null; do
  a=$(($a+1))
  if [ "$a" -ge "$LIMIT" ]; then
    echo "No network connection found after $LIMIT seconds, killing process."
    exit 0
  fi
  if [ "$a" -le 1 ] ; then
    echo 'Waiting for network connection...'
  fi
  if [ $(( $a % 5 )) -eq 0 ] ; then
    echo "     still waiting... ($a seconds)."
  fi
  sleep 1 # set increment to 1 second
done

eventdate=$(date)
ipaddress=$(ifconfig en0 inet | awk 'NR==2 {print $2}')
macaddress=$(ifconfig en0 | awk 'NR==2 {print $2}')

echo
echo
echo "$eventdate"
echo '============================================================================'
echo "IP address: $ipaddress"
echo "MAC address: $macaddress"
echo '============================================================================'
echo

# do some ish

exit 0