SSH tunnel management .bashrc functions

ssh_tunnel.bashrc

FWD_CMD="ssh -f -N -o Compression=no -L $LOCAL_PORT:$REMOTE_HOST:$REMOTE_PORT $FWD_USER@$FWD_HOST"

function sshpid {
	SSH_PID=$(ps aux | grep "$FWD_CMD" | grep -v 'grep' | awk '{print $2}')
}

function fwdrunning {
	sshpid
	if [[ -n $SSH_PID ]];then
		echo "ssh tunnel is running with PID $SSH_PID"
	else
		echo "ssh tunnel not found"
	fi
}

function sshfwd {
	sshpid
	if [[ -n $SSH_PID ]];then
		echo "ssh tunnel already running with PID $SSH_PID"
	else
		echo "Establishing SSH tunnel"
		$FWD_CMD
		RET=$?
		if [[ $RET -eq 0 ]];then
			sshpid
			echo "successfully started tunnel with PID $SSH_PID, kill with killsshfwd"
		else
			echo "SSH tunnel exited with status $RET"
		fi
	fi
}

function killsshfwd {
	sshpid
	if [[ -n $SSH_PID ]];then
		echo "killing SSH with PID $SSH_PID"
		kill $SSH_PID
	else
		echo "tunnel not running"
	fi
}