bash script for managing ssh tunnel and proxy settings for osx

tunnel.sh

#!/bin/bash

# Set me to your SSH server hostname or IP
host="example.com"

# Enable the Proxy location and open a tunnel if needed
if [ "$1" = "on" ]
    then
    # Check if there is an existing SSH connection...we don't want to go making
    # unnecessary ones.
    if [ -n "$(/bin/ps ax | /usr/bin/grep "ssh.$host" | /usr/bin/grep -v grep)" ]
    then
        echo "Connection open"
    else
    	echo "Connection not open\n"
    	# If there is no connection open a tunnel
    	nohup /usr/bin/ssh -fN -C -D 8888 "$host" &	
    fi
    # We switch to the Proxy location regardless of a new or pre-existing tunnel
    networksetup -switchtolocation Proxy

# Switch to the Home location
elif [ "$1" = "off" ]
    then
    networksetup -switchtolocation Home

# Destory the tunnel connections...as well as all SSH connections, cause lazy
elif [ "$1" = "kill" ]
    then
    killall -9 ssh

# Show the status of the tunnel and location setting
elif [ "$1" = "status" ]
    then
    if [ -n "$(/bin/ps ax | /usr/bin/grep "ssh.*$host" | /usr/bin/grep -v grep)" ]
        then
        echo "Tunnel: open"
    else
        echo "Tunnel: closed"
    fi
    echo "Location: `networksetup -getcurrentlocation`"
else
    # Helptext when no arg is supplied
    echo "tunnel [on/off/kill]"
fi