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pi-hole/automated install/uninstall.sh

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#!/usr/bin/env bash
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# 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
# Completely uninstalls Pi-hole
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#
# 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.
# Must be root to uninstall
if [[ $EUID -eq 0 ]];then
echo "::: You are root."
else
echo "::: Sudo will be used for the uninstall."
# Check if it is actually installed
# If it isn't, exit because the unnstall cannot complete
if [ -x "$(command -v sudo)" ];then
export SUDO="sudo"
else
echo "::: Please install sudo or run this as root."
exit 1
fi
fi
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# Compatability
if [ -x "$(command -v rpm)" ];then
# Fedora Family
if [ -x "$(command -v dnf)" ];then
PKG_MANAGER="dnf"
else
PKG_MANAGER="yum"
fi
PKG_REMOVE="$PKG_MANAGER remove -y"
PIHOLE_DEPS=( bind-utils bc dnsmasq lighttpd lighttpd-fastcgi php-common git curl unzip wget findutils )
package_check() {
rpm -qa | grep ^$1- > /dev/null
}
package_cleanup() {
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${SUDO} ${PKG_MANAGER} -y autoremove
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}
elif [ -x "$(command -v apt-get)" ];then
# Debian Family
PKG_MANAGER="apt-get"
PKG_REMOVE="$PKG_MANAGER -y remove --purge"
PIHOLE_DEPS=( dnsutils bc dnsmasq lighttpd php5-common git curl unzip wget )
package_check() {
dpkg-query -W -f='${Status}' "$1" 2>/dev/null | grep -c "ok installed"
}
package_cleanup() {
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${SUDO} ${PKG_MANAGER} -y autoremove
${SUDO} ${PKG_MANAGER} -y autoclean
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}
else
echo "OS distribution not supported"
exit
fi
spinner()
{
local pid=$1
local delay=0.50
local spinstr='/-\|'
while [ "$(ps a | awk '{print $1}' | grep "$pid")" ]; do
local temp=${spinstr#?}
printf " [%c] " "$spinstr"
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local spinstr=${temp}${spinstr%"$temp"}
sleep ${delay}
printf "\b\b\b\b\b\b"
done
printf " \b\b\b\b"
}
function removeAndPurge {
# Purge dependencies
echo ":::"
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for i in "${PIHOLE_DEPS[@]}"; do
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package_check ${i} > /dev/null
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if [ $? -eq 0 ]; then
while true; do
read -rp "::: Do you wish to remove $i from your system? [y/n]: " yn
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case ${yn} in
[Yy]* ) printf ":::\tRemoving %s..." "$i"; ${SUDO} ${PKG_REMOVE} "$i" &> /dev/null & spinner $!; printf "done!\n"; break;;
[Nn]* ) printf ":::\tSkipping %s" "$i\n"; break;;
* ) printf "::: You must answer yes or no!\n";;
esac
done
else
printf ":::\tPackage %s not installed... Not removing.\n" "$i"
fi
done
# Remove dependency config files
echo "::: Removing dnsmasq config files..."
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${SUDO} rm /etc/dnsmasq.conf /etc/dnsmasq.conf.orig /etc/dnsmasq.d/01-pihole.conf &> /dev/null
# Take care of any additional package cleaning
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printf "::: Auto removing & cleaning remaining dependencies..."
package_cleanup &> /dev/null & spinner $!; printf "done!\n";
# Call removeNoPurge to remove PiHole specific files
removeNoPurge
}
function removeNoPurge {
echo ":::"
# Only web directories/files that are created by pihole should be removed.
echo "::: Removing the Pi-hole Web server files..."
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${SUDO} rm -rf /var/www/html/admin &> /dev/null
${SUDO} rm -rf /var/www/html/pihole &> /dev/null
${SUDO} rm /var/www/html/index.lighttpd.orig &> /dev/null
# If the web directory is empty after removing these files, then the parent html folder can be removed.
if [ -d "/var/www/html" ]; then
if [[ ! "$(ls -A /var/www/html)" ]]; then
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${SUDO} rm -rf /var/www/html &> /dev/null
fi
fi
# Attempt to preserve backwards compatibility with older versions
# to guarantee no additional changes were made to /etc/crontab after
# the installation of pihole, /etc/crontab.pihole should be permanently
# preserved.
if [[ -f /etc/crontab.orig ]]; then
echo "::: Initial Pi-hole cron detected. Restoring the default system cron..."
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${SUDO} mv /etc/crontab /etc/crontab.pihole
${SUDO} mv /etc/crontab.orig /etc/crontab
${SUDO} service cron restart
fi
# Attempt to preserve backwards compatibility with older versions
if [[ -f /etc/cron.d/pihole ]];then
echo "::: Removing cron.d/pihole..."
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${SUDO} rm /etc/cron.d/pihole &> /dev/null
fi
echo "::: Removing config files and scripts..."
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package_check ${i} > /dev/null
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if [ $? -eq 1 ]; then
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${SUDO} rm -rf /etc/lighttpd/ &> /dev/null
else
if [ -f /etc/lighttpd/lighttpd.conf.orig ]; then
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${SUDO} mv /etc/lighttpd/lighttpd.conf.orig /etc/lighttpd/lighttpd.conf
fi
fi
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${SUDO} rm /etc/dnsmasq.d/adList.conf &> /dev/null
${SUDO} rm /etc/dnsmasq.d/01-pihole.conf &> /dev/null
${SUDO} rm -rf /var/log/*pihole* &> /dev/null
${SUDO} rm -rf /etc/pihole/ &> /dev/null
${SUDO} rm -rf /etc/.pihole/ &> /dev/null
${SUDO} rm -rf /opt/pihole/ &> /dev/null
${SUDO} rm /usr/local/bin/pihole &> /dev/null
${SUDO} rm /etc/bash_completion.d/pihole &> /dev/null
${SUDO} rm /etc/sudoers.d/pihole &> /dev/null
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echo ":::"
printf "::: Finished removing PiHole from your system. Sorry to see you go!\n"
printf "::: Reach out to us at https://github.com/pi-hole/pi-hole/issues if you need help\n"
printf "::: Reinstall by simpling running\n:::\n:::\tcurl -L https://install.pi-hole.net | bash\n:::\n::: at any time!\n:::\n"
printf "::: PLEASE RESET YOUR DNS ON YOUR ROUTER/CLIENTS TO RESTORE INTERNET CONNECTIVITY!\n"
}
######### SCRIPT ###########
echo "::: Preparing to remove packages, be sure that each may be safely removed depending on your operating system."
echo "::: (SAFE TO REMOVE ALL ON RASPBIAN)"
while true; do
read -rp "::: Do you wish to purge PiHole's dependencies from your OS? (You will be prompted for each package) [y/n]: " yn
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case ${yn} in
[Yy]* ) removeAndPurge; break;;
[Nn]* ) removeNoPurge; break;;
esac
done