adblock: Generates dnsmasq rules for NetworkManager

update-adblock-list

#!/bin/sh

FAKE_SERVER_ADDRESS='127.8.8.8'
URL='http://pgl.yoyo.org/adservers/serverlist.php?hostformat=dnsmasq&showintro=0&mimetype=plaintext'
FILENAME='/etc/NetworkManager/dnsmasq.d/adblock'

## do not update if fresh (24h)
if test -e "${FILENAME}"; then
  echo 'file exists'
  if ! test "$( find "${FILENAME}" -mmin +1440 )"; then
    echo 'file is fresh';
    exit 0
  fi
fi

## update
echo 'file is outdated'
curl "${URL}" 2>/dev/null > /tmp/adblock || exit 0
cat /tmp/adblock | sed "s/127\.0\.0\.1/${FAKE_SERVER_ADDRESS}/" > "${FILENAME}"
rm /tmp/adblock