mirror of
https://github.com/pi-hole/pi-hole.git
synced 2024-11-28 09:03:17 +00:00
283 lines
9.6 KiB
Bash
Executable file
283 lines
9.6 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 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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# Compiles a list of ad-serving domains by downloading them from multiple sources
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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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piholeIPfile=/tmp/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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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 $(i+1) }')
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fi
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# Ad-list sources--one per line in single quotes
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# The mahakala source is commented out due to many users having issues with it blocking legitimate domains.
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# Uncomment at your own risk
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sources=('https://adaway.org/hosts.txt'
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'http://adblock.gjtech.net/?format=unix-hosts'
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#'http://adblock.mahakala.is/'
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'http://hosts-file.net/ad_servers.txt'
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'http://www.malwaredomainlist.com/hostslist/hosts.txt'
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'http://pgl.yoyo.org/adservers/serverlist.php?'
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'http://someonewhocares.org/hosts/hosts'
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'http://winhelp2002.mvps.org/hosts.txt')
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# Variables for various stages of downloading and formatting the list
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basename=pihole
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piholeDir=/etc/$basename
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adList=$piholeDir/gravity.list
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blacklist=$piholeDir/blacklist.txt
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whitelist=$piholeDir/whitelist.txt
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latentWhitelist=$piholeDir/latentWhitelist.txt
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justDomainsExtension=domains
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matterandlight=$basename.0.matterandlight.txt
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supernova=$basename.1.supernova.txt
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eventHorizon=$basename.2.eventHorizon.txt
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accretionDisc=$basename.3.accretionDisc.txt
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eyeOfTheNeedle=$basename.4.wormhole.txt
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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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###########################
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# collapse - begin formation of pihole
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function gravity_collapse() {
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echo "** Neutrino emissions detected..."
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# Create the pihole resource directory if it doesn't exist. Future files will be stored here
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if [[ -d $piholeDir ]];then
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# Temporary hack to allow non-root access to pihole directory
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# Will update later, needed for existing installs, new installs should
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# create this directory as non-root
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sudo chmod 777 $piholeDir
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find "$piholeDir" -type f -exec sudo chmod 666 {} \;
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else
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echo "** Creating pihole directory..."
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mkdir $piholeDir
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fi
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}
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# patternCheck - check to see if curl downloaded any new files.
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function gravity_patternCheck() {
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patternBuffer=$1
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# check if the patternbuffer is a non-zero length file
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if [[ -s "$patternBuffer" ]];then
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# Some of the blocklists are copyright, they need to be downloaded
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# and stored as is. They can be processed for content after they
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# have been saved.
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cp $patternBuffer $saveLocation
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echo "List updated, transport successful..."
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else
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# curl didn't download any host files, probably because of the date check
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echo "No changes detected, transport skipped..."
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fi
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}
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# transport - curl the specified url with any needed command extentions
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function gravity_transport() {
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url=$1
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cmd_ext=$2
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agent=$3
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# tmp file, so we don't have to store the (long!) lists in RAM
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patternBuffer=$(mktemp)
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heisenbergCompensator=""
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if [[ -r $saveLocation ]]; then
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# if domain has been saved, add file for date check to only download newer
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heisenbergCompensator="-z $saveLocation"
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fi
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# Silently curl url
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curl -s $cmd_ext $heisenbergCompensator -A "$agent" $url > $patternBuffer
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# Check for list updates
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gravity_patternCheck $patternBuffer
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# Cleanup
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rm -f $patternBuffer
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}
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# spinup - main gravity function
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function gravity_spinup() {
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# Loop through domain list. Download each one and remove commented lines (lines beginning with '# 'or '/') and # blank lines
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for ((i = 0; i < "${#sources[@]}"; i++))
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do
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url=${sources[$i]}
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# Get just the domain from the URL
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domain=$(echo "$url" | cut -d'/' -f3)
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# Save the file as list.#.domain
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saveLocation=$piholeDir/list.$i.$domain.$justDomainsExtension
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activeDomains[$i]=$saveLocation
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agent="Mozilla/10.0"
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echo -n " Getting $domain list: "
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# Use a case statement to download lists that need special cURL commands
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# to complete properly and reset the user agent when required
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case "$domain" in
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"adblock.mahakala.is")
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agent='Mozilla/5.0 (X11; Linux x86_64; rv:30.0) Gecko/20100101 Firefox/30.0'
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cmd_ext="-e http://forum.xda-developers.com/"
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;;
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"pgl.yoyo.org")
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cmd_ext="-d mimetype=plaintext -d hostformat=hosts"
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;;
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# Default is a simple request
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*) cmd_ext=""
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esac
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gravity_transport $url $cmd_ext $agent
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done
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}
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# Schwarzchild - aggregate domains to one list and add blacklisted domains
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function gravity_Schwarzchild() {
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# Find all active domains and compile them into one file and remove CRs
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echo "** Aggregating list of domains..."
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truncate -s 0 $piholeDir/$matterandlight
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for i in "${activeDomains[@]}"
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do
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cat $i |tr -d '\r' >> $piholeDir/$matterandlight
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done
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}
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function gravity_Blacklist(){
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# Append blacklist entries if they exist
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if [[ -r $blacklist ]];then
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numberOf=$(cat $blacklist | sed '/^\s*$/d' | wc -l)
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echo "** Blacklisting $numberOf domain(s)..."
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cat $blacklist >> $piholeDir/$matterandlight
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fi
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}
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function gravity_Whitelist() {
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# Whitelist (if applicable) domains
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if [[ -r $whitelist ]];then
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# Remove whitelist entries
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numberOf=$(cat $whitelist | sed '/^\s*$/d' | wc -l)
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plural=; [[ "$numberOf" != "1" ]] && plural=s
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echo "** Whitelisting $numberOf domain${plural}..."
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# replace "." with "\." of each line to turn each entry into a
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# regexp so it can be parsed out with grep -x
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awk -F '[# \t]' 'NF>0&&$1!="" {print $1}' $whitelist | sed 's/\./\\./g' > $latentWhitelist
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else
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rm $latentWhitelist 2>/dev/null
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fi
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# Prevent our sources from being pulled into the hole
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plural=; [[ "${#sources[@]}" != "1" ]] && plural=s
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echo "** Whitelisting ${#sources[@]} ad list source${plural}..."
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for url in ${sources[@]}
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do
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echo "$url" | awk -F '/' '{print $3}' | sed 's/\./\\./g' >> $latentWhitelist
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done
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#remove whitelist entries from gravity.list
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awk -F':' '{ print $1 }' $latentWhitelist | xargs -I {} perl -i -ne'print unless /[^.]'{}'(?!.)/;' $adList
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}
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function gravity_unique() {
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# Sort and remove duplicates
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sort -u $piholeDir/$supernova > $piholeDir/$eventHorizon
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numberOf=$(wc -l < $piholeDir/$eventHorizon)
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echo "** $numberOf unique domains trapped in the event horizon."
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}
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function gravity_hostFormat() {
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# Format domain list as "192.168.x.x domain.com"
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echo "** Formatting domains into a HOSTS file..."
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# If there is a value in the $piholeIPv6, then IPv6 will be used, so the awk command modified to create a line for both protocols
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if [[ -n $piholeIPv6 ]];then
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cat $piholeDir/$eventHorizon | awk -v ipv4addr="$piholeIP" -v ipv6addr="$piholeIPv6" '{sub(/\r$/,""); print ipv4addr" "$0"\n"ipv6addr" "$0}' > $piholeDir/$accretionDisc
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else
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# Otherwise, just create gravity.list as normal using IPv4
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cat $piholeDir/$eventHorizon | awk -v ipv4addr="$piholeIP" '{sub(/\r$/,""); print ipv4addr" "$0}' > $piholeDir/$accretionDisc
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fi
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# Copy the file over as /etc/pihole/gravity.list so dnsmasq can use it
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cp $piholeDir/$accretionDisc $adList
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}
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# blackbody - remove any remnant files from script processes
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function gravity_blackbody() {
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# Loop through list files
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for file in $piholeDir/*.$justDomainsExtension
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do
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# If list is in active array then leave it (noop) else rm the list
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if [[ " ${activeDomains[@]} " =~ " ${file} " ]]; then
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:
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else
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rm -f $file
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fi
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done
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}
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function gravity_advanced() {
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# Remove comments and print only the domain name
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# Most of the lists downloaded are already in hosts file format but the spacing/formating is not contigious
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# This helps with that and makes it easier to read
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# It also helps with debugging so each stage of the script can be researched more in depth
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awk '($1 !~ /^#/) { if (NF>1) {print $2} else {print $1}}' $piholeDir/$matterandlight | sed -nr -e 's/\.{2,}/./g' -e '/\./p' > $piholeDir/$supernova
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numberOf=$(wc -l < $piholeDir/$supernova)
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echo "** $numberOf domains being pulled in by gravity..."
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gravity_unique
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}
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function gravity_reload() {
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# Reload hosts file
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echo "** Refresh lists in dnsmasq..."
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dnsmasqPid=$(pidof dnsmasq)
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if [[ $dnsmasqPid ]]; then
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# service already running - reload config
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sudo kill -HUP $dnsmasqPid
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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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}
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gravity_collapse
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gravity_spinup
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gravity_Schwarzchild
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gravity_Blacklist
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gravity_advanced
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gravity_hostFormat
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gravity_blackbody
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gravity_Whitelist
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gravity_reload
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