Print all proxy settings on OS X

osx-proxy-settings.sh

#!/bin/bash

function print_proxy_settings() {
    echo "$@"
    networksetup -getwebproxy "$@"
    echo ""
}

export -f print_proxy_settings

networksetup -listallnetworkservices | \
    tail -n +2 | \
    tr '\n' '\0' | \
    xargs -0 -n 1 bash -c 'print_proxy_settings "$@"' _