tunnel

#!/bin/bash

#port=
#user=
#host=
source .host &> /dev/null || { echo "Please set the host."; exit 1; }

name=$(basename "$0")
tunnel_cmd="ssh -CfNqT -D 1080 ${user}@${host} -p $port"
tunnel_lock=$(pgrep -xf "$tunnel_cmd")

if [[ "$#" = "1" && "$1" = "on" ]]
then
	if [ -n "$tunnel_lock" ]
	then
		echo Tunnel is already on.
		exit 1
	else
		eval $tunnel_cmd

		if [ "$?" != "0" ]
		then
			echo Failed to turn on tunnel.
			exit 1
		fi

		echo Tunnel is turned on.
	fi
elif [[ "$#" = "1" && "$1" = "off" ]]
then
	if [ -n "$tunnel_lock" ]
	then
		kill $tunnel_lock
		echo Tunnel is turned off.
	else
		echo Tunnel is already off.
		exit 1
	fi
else
	echo "Usage: $name on | off"
	exit 1
fi

exit 0