LUNs size and ASM

It is fairly straight forward to query ASM instance to find which path and what their sizes are. I found myself increasingly looking at a fallen ASM instance(storage configuration problems) and trying to figure out which disk belongs to which LUN and what size it is.
After doing this for 2 times manually; I had to write a script to do this.

for i in `ls /dev/oracleasm/disks`
do
fp=$(/etc/init.d/oracleasm querydisk -p $i |grep /dev/mapper| awk -F ":" '{ print $1 }')
echo "----------$i--------------"
echo "$fp"
p=$(echo "$fp"| awk -F "/" '{ print substr($4,1, length($4) - 2) }')
sudo /sbin/multipath -ll| grep -A 1 $p|awk '{ print $1 }'
done;

It goes without saying, you need to customize for your environment and setup. Here it is Linux multipath.