Start/Stop vpn from command line OSX

vpn.sh

#!/bin/bash

# VPN-commandline script @http://superuser.com/questions/358513/start-configured-vpn-from-command-line-osx

set -e
#set -x

act="$1"
vpn="$2"

function isnt_connected () {
    scutil --nc status "$vpn" | sed -n 1p | grep -qv Connected
}

function poll_until_connected () {
    let loops=0 || true
    let max_loops=200 # 200 * 0.1 is 20 seconds. Bash doesn't support floats

    while isnt_connected "$vpn"; do
        sleep 0.1 # can't use a variable here, bash doesn't have floats
        let loops=$loops+1
        [ $loops -gt $max_loops ] && break
    done

    [ $loops -le $max_loops ]
}

if [ "$act" = "start" ]; then
    scutil --nc start "$vpn"

    if poll_until_connected "$vpn"; then
        echo "Connected to $vpn!"
        exit 0
    else
        echo "I'm too impatient!"
        scutil --nc stop "$vpn"
        exit 1
    fi
elif [ "$act" = "stop" ]; then
    if isnt_connected "$vpn"; then
        echo "disconnected already"
    else
        scutil --nc stop "$vpn"
	echo "Disconnected $vpn!"
    fi
    exit 0
else
    echo "NOT connected!!! / Invalid action!!!"
fi

Steps

Make sure it's executable

chmod +x path/vpn.sh
path/vpn.sh start fooVPN
path/vpn.sh stop fooVPN

optional

Move path/vpn.sh to /usr/local/bin as /usr/local/bin/vpn to make it act like command function

Reload Terminal and you have now vpn as command

Run

vpn start fooVPN
vpn stop fooVPN