#!/usr/bin/env bash # Pi-hole: A black hole for Internet advertisements # (c) 2015, 2016 by Jacob Salmela # Network-wide ad blocking via your Raspberry Pi # http://pi-hole.net # Blacklists domains # # Pi-hole is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 2 of the License, or # (at your option) any later version. if [[ $# = 0 ]]; then echo "Immediately blacklists one or more domains in the hosts file" echo " " echo "Usage: blacklist.sh domain1 [domain2 ...]" echo " " echo "Options:" echo " -d, --delmode Remove domains from the blacklist" echo " -nr, --noreload Update blacklist without refreshing dnsmasq" echo " -f, --force Force updating of the hosts files, even if there are no changes" echo " -q, --quiet output is less verbose" exit 1 fi #globals blacklist=/etc/pihole/blacklist.txt adList=/etc/pihole/gravity.list reload=true addmode=true force=false versbose=true domList=() domToRemoveList=() piholeIPv6file=/etc/pihole/.useIPv6 # Otherwise, the IP address can be taken directly from the machine, which will happen when the script is run by the user and not the installation script IPv4dev=$(ip route get 8.8.8.8 | awk '{for(i=1;i<=NF;i++)if($i~/dev/)print $(i+1)}') piholeIPCIDR=$(ip -o -f inet addr show dev "$IPv4dev" | awk '{print $4}' | awk 'END {print}') piholeIP=${piholeIPCIDR%/*} modifyHost=false if [[ -f $piholeIPv6file ]];then # If the file exists, then the user previously chose to use IPv6 in the automated installer piholeIPv6=$(ip -6 route get 2001:4860:4860::8888 | awk -F " " '{ for(i=1;i<=NF;i++) if ($i == "src") print $(i+1) }') fi function HandleOther(){ #check validity of domain validDomain=$(echo "$1" | perl -ne'print if /\b((?=[a-z0-9-]{1,63}\.)(xn--)?[a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,63}\b/') if [ -z "$validDomain" ]; then echo "$1" is not a valid argument or domain name else domList=("${domList[@]}" $validDomain) fi } function PopBlacklistFile(){ #check blacklist file exists, and if not, create it if [[ ! -f $blacklist ]];then touch $blacklist fi for dom in "${domList[@]}"; do if "$addmode"; then AddDomain "$dom" else RemoveDomain "$dom" fi done } function AddDomain(){ #| sed 's/\./\\./g' bool=false grep -Ex -q "$1" $blacklist || bool=true if $bool; then #domain not found in the blacklist file, add it! if $versbose; then echo -n "::: Adding $1 to blacklist file..." fi echo "$1" >> $blacklist modifyHost=true echo " done!" else if $versbose; then echo "::: $1 already exists in blacklist.txt! No need to add" fi fi } function RemoveDomain(){ bool=false grep -Ex -q "$1" $blacklist || bool=true if $bool; then #Domain is not in the blacklist file, no need to Remove if $versbose; then echo "::: $1 is NOT blacklisted! No need to remove" fi else #Domain is in the blacklist file, add to a temporary array if $versbose; then echo "::: Un-blacklisting $dom..." fi domToRemoveList=("${domToRemoveList[@]}" $1) modifyHost=true fi } function ModifyHostFile(){ if $addmode; then #add domains to the hosts file if [[ -r $blacklist ]];then numberOf=$(cat $blacklist | sed '/^\s*$/d' | wc -l) plural=; [[ "$numberOf" != "1" ]] && plural=s echo ":::" echo -n "::: Modifying HOSTS file to blacklist $numberOf domain${plural}..." if [[ -n $piholeIPv6 ]];then $blacklist | awk -v ipv4addr="$piholeIP" -v ipv6addr="$piholeIPv6" '{sub(/\r$/,""); print ipv4addr" "$0"\n"ipv6addr" "$0}' >> $adList else $blacklist | awk -v ipv4addr="$piholeIP" '{sub(/\r$/,""); print ipv4addr" "$0}' >>$adList fi fi else echo ":::" for dom in "${domToRemoveList[@]}" do #we need to remove the domains from the blacklist file and the host file echo "::: $dom" echo -n "::: removing from HOSTS file..." echo "$dom" | sed 's/\./\\./g' | xargs -I {} perl -i -ne'print unless /[^.]'{}'(?!.)/;' $adList echo " done!" echo -n "::: removing from blackist.txt..." echo "$dom" | sed 's/\./\\./g' | xargs -I {} perl -i -ne'print unless /'{}'(?!.)/;' $blacklist echo " done!" done fi } function Reload() { # Reload hosts file echo ":::" echo -n "::: Refresh lists in dnsmasq..." dnsmasqPid=$(pidof dnsmasq) if [[ $dnsmasqPid ]]; then # service already running - reload config sudo kill -HUP "$dnsmasqPid" else # service not running, start it up sudo service dnsmasq start fi echo " done!" } ################################################### for var in "$@" do case "$var" in "-nr"| "--noreload" ) reload=false;; "-d" | "--delmode" ) addmode=false;; "-f" | "--force" ) force=true;; "-q" | "--quiet" ) versbose=false;; * ) HandleOther "$var";; esac done PopBlacklistFile if $modifyHost || $force; then ModifyHostFile else if $versbose; then echo "::: No changes need to be made" fi exit 1 fi if $reload; then Reload fi