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