socks.sh

#!/bin/sh
#
# ^^^^^^^ That tells your shell what shell should be used to execute this script.
#
#         As a rule you nearly always write in borne shell (plain sh)
#         regardless of what shell you use for your terminals.
#
#         Hence this should always be the first line in every script you write.
#
#
# To run this script from the CLI you only need to do:
#
# ./scriptname.sh
#
# You should never need to exec it.
#
# if it's not executable, make it so:
#
# chmod +x scriptname.sh
#


#
# I've commented out those lines just so I could test the structure syntax is
# correct. Uncomment them and let me know if they work.
#
function socks
{
    if [ "$1" = "on" ]; then
        echo "Getting dressed"
        # checks to see if there's an existing SSH tunnel and if not, it starts one
        if [[ -z $(lsof -n -i :8080 | grep 'ssh' | awk '{print $2;}') ]]; then
            echo "Putting my socks on"
            sudo networksetup -setsocksfirewallproxy "Ethernet" localhost 8080
            sudo networksetup -setsocksfirewallproxy "Wi-Fi" localhost 8080
            ssh -C2qTnNf -D 8080 mia
            echo "The socks are on!"
        else
            echo "We have socks on, I'm not putting on another pair!"
        fi
    elif [ $1 = "off" ]; then
        if [[ -z $(lsof -n -i :8080 | grep 'ssh' | awk '{print $2;}') ]]; then
            echo "I'm not wearing any socks?"
        else
            echo "Taking my socks off"
            sudo networksetup -setsocksfirewallproxystate "Ethernet" off
            sudo networksetup -setsocksfirewallproxystate "Wi-Fi" off
            kill -9 $(lsof -n -i :8080 | grep 'ssh' | awk '{print $2;}')
            echo "Clearnet is open!"
        fi
    elif [ $1 = "status" ]; then
        if [[ -z $(lsof -n -i :8080 | grep 'ssh' | awk '{print $2;}') ]]; then
            echo "My socks are off!"
        else
            echo "My socks are on!"
        fi
    else
        echo "Huh?"
    fi
}

#
# If the number of arguments are less than 1 let the idiot know!
#
if [ $# -lt 1 ]; then
  echo "Error: I can only put socks on or off, wtf?"
  exit 1
fi


# calls must come after function definitions
socks $@;

Socks now does error checks before doing anything and has a status command.