get pid for a process running on a port

whatsonport.zsh

whatsonport () {
	if [ $# -eq 1 ]
	then
		lsof -i :$1 | awk '{ print $2; }' | head -n 2 | grep --color=auto --exclude-dir={.bzr,CVS,.git,.hg,.svn,.idea,.tox} -v PID
	else
		echo "Usage: whatsonport [port]"
	fi
}