A simple wrapper script for setting a network location on OS X using the networksetup command.

netloc.sh

#! /usr/bin/env bash

##
# Switches to the specified network location
##
function switch_location() {
    if ! /usr/sbin/networksetup -switchtolocation "${loc}" >/dev/null 2>&1 ; then
        echo "Error: Network location \"${loc}\" not found"
    fi
}

##
# Lists the available network locations
##
function list_locations() {
    networksetup -listlocations
}

##
# Prints usage information
##
function usage() {
    echo "Usage: netloc [-l] [-h] location"
    echo "Example: netloc work"
}

##
# Parse options
##
while getopts ':lh' opt; do
    case ${opt} in
        l)
            list_locations
            exit 0
            ;;
        h)
            usage
            exit 0
            ;;
        \?)
            echo "Error: -$OPTARG is an invalid option" >&2
            usage
            exit 1
            ;;
        :)
            echo "Error: -$OPTARG requires an argument" >&2
            usage
            exit 1
            ;;
    esac
done

##
# Parses the required operand
##
shift $((OPTIND-1))

if [[ $# -lt 1 ]]; then
    usage
    exit 1
fi

##
# Must be run as root or via sudo
##
if [ "$EUID" -ne 0 ]; then
    echo "Error: Must be run as the superuser"
    exit 1
fi

loc=${1}

switch_location