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#!/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
# Whitelists 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.
#rootcheck
if [[ $EUID -eq 0 ]];then
echo "::: You are root."
else
echo "::: sudo will be used."
# Check if it is actually installed
# If it isn't, exit because the install cannot complete
if [[ $(dpkg-query -s sudo) ]];then
export SUDO="sudo"
else
echo "::: Please install sudo or run this script as root."
exit 1
fi
fi
function helpFunc()
{
echo "::: Immediately whitelists one or more domains in the hosts file"
echo ":::"
echo "::: Usage: pihole -w domain1 [domain2 ...]"
echo ":::"
echo "::: Options:"
echo "::: -d, --delmode Remove domains from the whitelist"
echo "::: -nr, --noreload Update Whitelist 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"
echo "::: -h, --help Show this help dialog"
echo "::: -l, --list Display your whitelisted domains"
exit 1
}
if [[ $# = 0 ]]; then
helpFunc
fi
#globals
basename=pihole
piholeDir=/etc/$basename
adList=$piholeDir/gravity.list
whitelist=$piholeDir/whitelist.txt
reload=true
addmode=true
force=false
verbose=true
domList=()
domToRemoveList=()
piholeIPfile=/etc/pihole/piholeIP
piholeIPv6file=/etc/pihole/.useIPv6
if [[ -f $piholeIPfile ]];then
# If the file exists, it means it was exported from the installation script and we should use that value instead of detecting it in this script
piholeIP=$(cat $piholeIPfile)
#rm $piholeIPfile
else
# Otherwise, the IP address can be taken directly from the machine, which will happen when the script is run by the user and not the installation script
IPv4dev=$(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%/*}
fi
modifyHost=false
# After setting defaults, check if there's local overrides
if [[ -r $piholeDir/pihole.conf ]];then
echo "::: Local calibration requested..."
. $piholeDir/pihole.conf
fi
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 PopWhitelistFile(){
#check whitelist file exists, and if not, create it
if [[ ! -f $whitelist ]];then
touch $whitelist
fi
for dom in "${domList[@]}"
do
if $addmode; then
AddDomain "$dom"
else
RemoveDomain "$dom"
fi
done
}
function AddDomain(){
#| sed 's/\./\\./g'
bool=false
grep -Ex -q "$1" $whitelist || bool=true
if $bool; then
#domain not found in the whitelist file, add it!
if $verbose; then
echo -n "::: Adding $1 to $whitelist..."
fi
echo "$1" >> $whitelist
modifyHost=true
if $verbose; then
echo " done!"
fi
else
if $verbose; then
echo "::: $1 already exists in $whitelist, no need to add!"
fi
fi
}
function RemoveDomain(){
bool=false
grep -Ex -q "$1" $whitelist || bool=true
if $bool; then
#Domain is not in the whitelist file, no need to Remove
if $verbose; then
echo "::: $1 is NOT whitelisted! No need to remove"
fi
else
#Domain is in the whitelist file, add to a temporary array and remove from whitelist file
#if $verbose; then
#echo "::: Un-whitelisting $dom..."
#fi
domToRemoveList=("${domToRemoveList[@]}" $1)
modifyHost=true
fi
}
function ModifyHostFile(){
if $addmode; then
#remove domains in from hosts file
if [[ -r $whitelist ]];then
# Remove whitelist entries
numberOf=$(cat $whitelist | sed '/^\s*$/d' | wc -l)
plural=; [[ "$numberOf" != "1" ]] && plural=s
echo ":::"
echo -n "::: Modifying HOSTS file to whitelist $numberOf domain${plural}..."
awk -F':' '{print $1}' $whitelist | while read -r line; do echo "$piholeIP $line"; done > /etc/pihole/whitelist.tmp
awk -F':' '{print $1}' $whitelist | while read -r line; do echo "$piholeIPv6 $line"; done >> /etc/pihole/whitelist.tmp
echo "l" >> /etc/pihole/whitelist.tmp
grep -F -x -v -f $piholeDir/whitelist.tmp $adList > $piholeDir/gravity.tmp
rm $adList
mv $piholeDir/gravity.tmp $adList
rm $piholeDir/whitelist.tmp
echo " done!"
fi
else
#we need to add the removed domains to the hosts file
echo ":::"
echo "::: Modifying HOSTS file to un-whitelist domains..."
for rdom in "${domToRemoveList[@]}"
do
if [[ -n $piholeIPv6 ]];then
echo -n "::: Un-whitelisting $rdom on IPv4 and IPv6..."
echo "$rdom" | awk -v ipv4addr="$piholeIP" -v ipv6addr="$piholeIPv6" '{sub(/\r$/,""); print ipv4addr" "$0"\n"ipv6addr" "$0}' >> $adList
echo " done!"
else
echo -n "::: Un-whitelisting $rdom on IPv4"
echo "$rdom" | awk -v ipv4addr="$piholeIP" '{sub(/\r$/,""); print ipv4addr" "$0}' >>$adList
echo " done!"
fi
echo -n "::: Removing $rdom from $whitelist..."
echo "$rdom" | sed 's/\./\\./g' | xargs -I {} perl -i -ne'print unless /'{}'(?!.)/;' $whitelist
echo " done!"
done
fi
}
function Reload() {
# Reload hosts file
echo ":::"
echo -n "::: Refresh lists in dnsmasq..."
dnsmasqPid=$(pidof dnsmasq)
if [[ $dnsmasqPid ]]; then
# service already running - reload config
$SUDO killall -s HUP dnsmasq
else
# service not running, start it up
$SUDO service dnsmasq start
fi
echo " done!"
}
function DisplayWlist() {
verbose=false
echo -e " Displaying Gravity Resistant Domains \n"
count=1
while IFS= read -r RD
do
echo "${count}: $RD"
count=$((count+1))
done < "$whitelist"
}
###################################################
for var in "$@"
do
case "$var" in
"-nr"| "--noreload" ) reload=false;;
"-d" | "--delmode" ) addmode=false;;
"-f" | "--force" ) force=true;;
"-q" | "--quiet" ) verbose=false;;
"-h" | "--help" ) helpFunc;;
"-l" | "--list" ) DisplayWlist;;
* ) HandleOther "$var";;
esac
done
PopWhitelistFile
if $modifyHost || $force; then
ModifyHostFile
else
if $verbose; then
echo ":::"
echo "::: No changes need to be made"
fi
exit 1
fi
if $reload; then
Reload
fi
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