Script to generate adblocking configuration for Unbound

gen-adblock.sh

#!/bin/sh
# See https://blakerain.com/blog/adding-dns-adblock-to-unbound/
UNBOUND="/var/unbound/etc"
VARIANT=${VARIANT:-fakenews-gambling-social}
URL="https://raw.githubusercontent.com/StevenBlack/hosts/master/alternates/$VARIANT/hosts"
wget -qO- "$URL" | grep '^0\.0\.0\.0' | sort | \
  awk '{print "local-zone: \""$2"\" refuse"}' > "$UNBOUND/adblock.conf"
if [ -f "$HOME/adblock.exceptions" ]; then
  (cat "$HOME/adblock.exceptions" | \
    awk '{gsub(/\./,"\\."); print "g/\"" $0 "\"/d"}'; echo w) | ed - "$UNBOUND/adblock.conf"
  cat "$HOME/adblock.exceptions" | \
    awk '{print "local-zone: \""$0".\" transparent"}' > "$UNBOUND/adblock.exceptions.conf"
fi