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basic-install.sh
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basic-install.sh
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#!/usr/bin/env bash
# shellcheck disable=SC1090
# Pi-hole: A black hole for Internet advertisements
# (c) Pi-hole (https://pi-hole.net)
# Network-wide ad blocking via your own hardware.
#
# Installs and Updates Pi-hole
#
# This file is copyright under the latest version of the EUPL.
# Please see LICENSE file for your rights under this license.
# pi-hole.net/donate
#
# Install with this command (from your Linux machine):
#
# curl -sSL https://install.pi-hole.net | bash
# -e option instructs bash to immediately exit if any command [1] has a non-zero exit status
# We do not want users to end up with a partially working install, so we exit the script
# instead of continuing the installation with something broken
set -e
# Append common folders to the PATH to ensure that all basic commands are available.
# When using "su" an incomplete PATH could be passed: https://github.com/pi-hole/pi-hole/issues/3209
export PATH+=':/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
######## VARIABLES #########
# For better maintainability, we store as much information that can change in variables
# This allows us to make a change in one place that can propagate to all instances of the variable
# These variables should all be GLOBAL variables, written in CAPS
# Local variables will be in lowercase and will exist only within functions
# It's still a work in progress, so you may see some variance in this guideline until it is complete
# Dialog result codes
# dialog code values can be set by environment variables, we only override if
# the env var is not set or empty.
: "${DIALOG_OK:=0}"
: "${DIALOG_CANCEL:=1}"
: "${DIALOG_ESC:=255}"
# List of supported DNS servers
DNS_SERVERS=$(cat << EOM
Google (ECS, DNSSEC);8.8.8.8;8.8.4.4;2001:4860:4860:0:0:0:0:8888;2001:4860:4860:0:0:0:0:8844
OpenDNS (ECS, DNSSEC);208.67.222.222;208.67.220.220;2620:119:35::35;2620:119:53::53
Level3;4.2.2.1;4.2.2.2;;
Comodo;8.26.56.26;8.20.247.20;;
DNS.WATCH (DNSSEC);84.200.69.80;84.200.70.40;2001:1608:10:25:0:0:1c04:b12f;2001:1608:10:25:0:0:9249:d69b
Quad9 (filtered, DNSSEC);9.9.9.9;149.112.112.112;2620:fe::fe;2620:fe::9
Quad9 (unfiltered, no DNSSEC);9.9.9.10;149.112.112.10;2620:fe::10;2620:fe::fe:10
Quad9 (filtered, ECS, DNSSEC);9.9.9.11;149.112.112.11;2620:fe::11;2620:fe::fe:11
Cloudflare (DNSSEC);1.1.1.1;1.0.0.1;2606:4700:4700::1111;2606:4700:4700::1001
EOM
)
# Location for final installation log storage
installLogLoc="/etc/pihole/install.log"
# This is a file used for the colorized output
coltable="/opt/pihole/COL_TABLE"
# Root of the web server
webroot="/var/www/html"
# We clone (or update) two git repositories during the install. This helps to make sure that we always have the latest versions of the relevant files.
# web is used to set up the Web admin interface.
# Pi-hole contains various setup scripts and files which are critical to the installation.
# Search for "PI_HOLE_LOCAL_REPO" in this file to see all such scripts.
# Two notable scripts are gravity.sh (used to generate the HOSTS file) and advanced/Scripts/webpage.sh (used to install the Web admin interface)
webInterfaceGitUrl="https://github.com/pi-hole/web.git"
webInterfaceDir="${webroot}/admin"
piholeGitUrl="https://github.com/pi-hole/pi-hole.git"
PI_HOLE_LOCAL_REPO="/etc/.pihole"
# List of pihole scripts, stored in an array
PI_HOLE_FILES=(list piholeDebug piholeLogFlush setupLCD update version gravity uninstall webpage)
# This directory is where the Pi-hole scripts will be installed
PI_HOLE_INSTALL_DIR="/opt/pihole"
PI_HOLE_CONFIG_DIR="/etc/pihole"
PI_HOLE_BIN_DIR="/usr/local/bin"
if [ -z "$useUpdateVars" ]; then
useUpdateVars=false
fi
adlistFile="/etc/pihole/adlists.list"
# Pi-hole needs an IP address; to begin, these variables are empty since we don't know what the IP is until this script can run
IPV4_ADDRESS=${IPV4_ADDRESS}
IPV6_ADDRESS=${IPV6_ADDRESS}
# Give settings their default values. These may be changed by prompts later in the script.
QUERY_LOGGING=true
WEBPORT=8080
PRIVACY_LEVEL=0
if [ -z "${USER}" ]; then
USER="$(id -un)"
fi
# dialog dimensions: Let dialog handle appropriate sizing.
r=20
c=70
######## Undocumented Flags. Shhh ########
# These are undocumented flags; some of which we can use when repairing an installation
# The runUnattended flag is one example of this
reconfigure=false
runUnattended=false
# Check arguments for the undocumented flags
for var in "$@"; do
case "$var" in
"--reconfigure" ) reconfigure=true;;
"--unattended" ) runUnattended=true;;
esac
done
# If the color table file exists,
if [[ -f "${coltable}" ]]; then
# source it
source "${coltable}"
# Otherwise,
else
# Set these values so the installer can still run in color
COL_NC='\e[0m' # No Color
COL_LIGHT_GREEN='\e[1;32m'
COL_LIGHT_RED='\e[1;31m'
TICK="[${COL_LIGHT_GREEN}✓${COL_NC}]"
CROSS="[${COL_LIGHT_RED}✗${COL_NC}]"
INFO="[i]"
# shellcheck disable=SC2034
DONE="${COL_LIGHT_GREEN} done!${COL_NC}"
OVER="\\r\\033[K"
fi
# A simple function that just echoes out our logo in ASCII format
# This lets users know that it is a Pi-hole, LLC product
show_ascii_berry() {
echo -e "
${COL_LIGHT_GREEN}.;;,.
.ccccc:,.
:cccclll:. ..,,
:ccccclll. ;ooodc
'ccll:;ll .oooodc
.;cll.;;looo:.
${COL_LIGHT_RED}.. ','.
.',,,,,,'.
.',,,,,,,,,,.
.',,,,,,,,,,,,....
....''',,,,,,,'.......
......... .... .........
.......... ..........
.......... ..........
......... .... .........
........,,,,,,,'......
....',,,,,,,,,,,,.
.',,,,,,,,,'.
.',,,,,,'.
..'''.${COL_NC}
"
}
is_command() {
# Checks to see if the given command (passed as a string argument) exists on the system.
# The function returns 0 (success) if the command exists, and 1 if it doesn't.
local check_command="$1"
command -v "${check_command}" >/dev/null 2>&1
}
os_check() {
if [ "$PIHOLE_SKIP_OS_CHECK" != true ]; then
# This function gets a list of supported OS versions from a TXT record at versions.pi-hole.net
# and determines whether or not the script is running on one of those systems
local remote_os_domain valid_os valid_version valid_response detected_os detected_version display_warning cmdResult digReturnCode response
remote_os_domain=${OS_CHECK_DOMAIN_NAME:-"versions.pi-hole.net"}
detected_os=$(grep '^ID=' /etc/os-release | cut -d '=' -f2 | tr -d '"')
detected_version=$(grep VERSION_ID /etc/os-release | cut -d '=' -f2 | tr -d '"')
# Test via IPv4
cmdResult="$(dig -4 +short -t txt "${remote_os_domain}" @ns1.pi-hole.net 2>&1; echo $?)"
# Gets the return code of the previous command (last line)
digReturnCode="${cmdResult##*$'\n'}"
if [ ! "${digReturnCode}" == "0" ]; then
valid_response=false
else
# Dig returned 0 (success), so get the actual response, and loop through it to determine if the detected variables above are valid
response="${cmdResult%%$'\n'*}"
# If the value of ${response} is a single 0, then this is the return code, not an actual response.
if [ "${response}" == 0 ]; then
valid_response=false
else
valid_response=true
fi
fi
# Try again via IPv6
if [ "$valid_response" = false ]; then
unset valid_response
cmdResult="$(dig -6 +short -t txt "${remote_os_domain}" @ns1.pi-hole.net 2>&1; echo $?)"
# Gets the return code of the previous command (last line)
digReturnCode="${cmdResult##*$'\n'}"
if [ ! "${digReturnCode}" == "0" ]; then
valid_response=false
else
# Dig returned 0 (success), so get the actual response, and loop through it to determine if the detected variables above are valid
response="${cmdResult%%$'\n'*}"
# If the value of ${response} is a single 0, then this is the return code, not an actual response.
if [ "${response}" == 0 ]; then
valid_response=false
else
valid_response=true
fi
fi
fi
if [ "$valid_response" = true ]; then
IFS=" " read -r -a supportedOS < <(echo "${response}" | tr -d '"')
for distro_and_versions in "${supportedOS[@]}"
do
distro_part="${distro_and_versions%%=*}"
versions_part="${distro_and_versions##*=}"
# If the distro part is a (case-insensitive) substring of the computer OS
if [[ "${detected_os^^}" =~ ${distro_part^^} ]]; then
valid_os=true
IFS="," read -r -a supportedVer <<<"${versions_part}"
for version in "${supportedVer[@]}"
do
if [[ "${detected_version}" =~ $version ]]; then
valid_version=true
break
fi
done
break
fi
done
fi
if [ "$valid_os" = true ] && [ "$valid_version" = true ] && [ "$valid_response" = true ]; then
display_warning=false
fi
if [ "$display_warning" != false ]; then
if [ "$valid_response" = false ]; then
if [ "${digReturnCode}" -eq 0 ]; then
errStr="dig succeeded, but response was blank. Please contact support"
else
errStr="dig failed with return code ${digReturnCode}"
fi
printf " %b %bRetrieval of supported OS list failed. %s. %b\\n" "${CROSS}" "${COL_LIGHT_RED}" "${errStr}" "${COL_NC}"
printf " %bUnable to determine if the detected OS (%s %s) is supported%b\\n" "${COL_LIGHT_RED}" "${detected_os^}" "${detected_version}" "${COL_NC}"
printf " Possible causes for this include:\\n"
printf " - Firewall blocking certain DNS lookups from Pi-hole device\\n"
printf " - ns1.pi-hole.net being blocked (required to obtain TXT record from versions.pi-hole.net containing supported operating systems)\\n"
printf " - Other internet connectivity issues\\n"
else
printf " %b %bUnsupported OS detected: %s %s%b\\n" "${CROSS}" "${COL_LIGHT_RED}" "${detected_os^}" "${detected_version}" "${COL_NC}"
printf " If you are seeing this message and you do have a supported OS, please contact support.\\n"
fi
printf "\\n"
printf " %bhttps://docs.pi-hole.net/main/prerequisites/#supported-operating-systems%b\\n" "${COL_LIGHT_GREEN}" "${COL_NC}"
printf "\\n"
printf " If you wish to attempt to continue anyway, you can try one of the following commands to skip this check:\\n"
printf "\\n"
printf " e.g: If you are seeing this message on a fresh install, you can run:\\n"
printf " %bcurl -sSL https://install.pi-hole.net | sudo PIHOLE_SKIP_OS_CHECK=true bash%b\\n" "${COL_LIGHT_GREEN}" "${COL_NC}"
printf "\\n"
printf " If you are seeing this message after having run pihole -up:\\n"
printf " %bsudo PIHOLE_SKIP_OS_CHECK=true pihole -r%b\\n" "${COL_LIGHT_GREEN}" "${COL_NC}"
printf " (In this case, your previous run of pihole -up will have already updated the local repository)\\n"
printf "\\n"
printf " It is possible that the installation will still fail at this stage due to an unsupported configuration.\\n"
printf " If that is the case, you can feel free to ask the community on Discourse with the %bCommunity Help%b category:\\n" "${COL_LIGHT_RED}" "${COL_NC}"
printf " %bhttps://discourse.pi-hole.net/c/bugs-problems-issues/community-help/%b\\n" "${COL_LIGHT_GREEN}" "${COL_NC}"
printf "\\n"
exit 1
else
printf " %b %bSupported OS detected%b\\n" "${TICK}" "${COL_LIGHT_GREEN}" "${COL_NC}"
fi
else
printf " %b %bPIHOLE_SKIP_OS_CHECK env variable set to true - installer will continue%b\\n" "${INFO}" "${COL_LIGHT_GREEN}" "${COL_NC}"
fi
}
# This function waits for dpkg to unlock, which signals that the previous apt-get command has finished.
test_dpkg_lock() {
i=0
printf " %b Waiting for package manager to finish (up to 30 seconds)\\n" "${INFO}"
# fuser is a program to show which processes use the named files, sockets, or filesystems
# So while the lock is held,
while fuser /var/lib/dpkg/lock >/dev/null 2>&1
do
# we wait half a second,
sleep 0.5
# increase the iterator,
((i=i+1))
# exit if waiting for more then 30 seconds
if [[ $i -gt 60 ]]; then
printf " %b %bError: Could not verify package manager finished and released lock. %b\\n" "${CROSS}" "${COL_LIGHT_RED}" "${COL_NC}"
printf " Attempt to install packages manually and retry.\\n"
exit 1;
fi
done
# and then report success once dpkg is unlocked.
return 0
}
# Compatibility
package_manager_detect() {
# TODO - pull common packages for both distributions out into a common variable, then add
# the distro-specific ones below.
# First check to see if apt-get is installed.
if is_command apt-get ; then
# Set some global variables here
# We don't set them earlier since the installed package manager might be rpm, so these values would be different
PKG_MANAGER="apt-get"
# A variable to store the command used to update the package cache
UPDATE_PKG_CACHE="${PKG_MANAGER} update"
# The command we will use to actually install packages
PKG_INSTALL=("${PKG_MANAGER}" -qq --no-install-recommends install)
# grep -c will return 1 if there are no matches. This is an acceptable condition, so we OR TRUE to prevent set -e exiting the script.
PKG_COUNT="${PKG_MANAGER} -s -o Debug::NoLocking=true upgrade | grep -c ^Inst || true"
# Update package cache
update_package_cache || exit 1
# Packages required to perform the os_check and FTL binary detection
OS_CHECK_DEPS=(grep dnsutils binutils)
# Packages required to run this install script
INSTALLER_DEPS=(git iproute2 dialog ca-certificates)
# Packages required to run Pi-hole
PIHOLE_DEPS=(cron curl iputils-ping psmisc sudo unzip libcap2-bin dns-root-data libcap2 netcat-openbsd procps jq)
# If apt-get is not found, check for rpm.
elif is_command rpm ; then
# Then check if dnf or yum is the package manager
if is_command dnf ; then
PKG_MANAGER="dnf"
else
PKG_MANAGER="yum"
fi
# These variable names match the ones for apt-get. See above for an explanation of what they are for.
PKG_INSTALL=("${PKG_MANAGER}" install -y)
# CentOS package manager returns 100 when there are packages to update so we need to || true to prevent the script from exiting.
PKG_COUNT="${PKG_MANAGER} check-update | grep -E '(.i686|.x86|.noarch|.arm|.src|.riscv64)' | wc -l || true"
OS_CHECK_DEPS=(grep bind-utils)
INSTALLER_DEPS=(git dialog iproute newt procps-ng chkconfig ca-certificates binutils)
PIHOLE_DEPS=(cronie curl findutils sudo unzip psmisc libcap nmap-ncat jq)
# If neither apt-get or yum/dnf package managers were found
else
# we cannot install required packages
printf " %b No supported package manager found\\n" "${CROSS}"
# so exit the installer
exit
fi
}
# A function for checking if a directory is a git repository
is_repo() {
# Use a named, local variable instead of the vague $1, which is the first argument passed to this function
# These local variables should always be lowercase
local directory="${1}"
# A variable to store the return code
local rc
# If the first argument passed to this function is a directory,
if [[ -d "${directory}" ]]; then
# move into the directory
pushd "${directory}" &> /dev/null || return 1
# Use git to check if the directory is a repo
# git -C is not used here to support git versions older than 1.8.4
git status --short &> /dev/null || rc=$?
# If the command was not successful,
else
# Set a non-zero return code if directory does not exist
rc=1
fi
# Move back into the directory the user started in
popd &> /dev/null || return 1
# Return the code; if one is not set, return 0
return "${rc:-0}"
}
# A function to clone a repo
make_repo() {
# Set named variables for better readability
local directory="${1}"
local remoteRepo="${2}"
# The message to display when this function is running
str="Clone ${remoteRepo} into ${directory}"
# Display the message and use the color table to preface the message with an "info" indicator
printf " %b %s..." "${INFO}" "${str}"
# If the directory exists,
if [[ -d "${directory}" ]]; then
# Return with a 1 to exit the installer. We don't want to overwrite what could already be here in case it is not ours
str="Unable to clone ${remoteRepo} into ${directory} : Directory already exists"
printf "%b %b%s\\n" "${OVER}" "${CROSS}" "${str}"
return 1
fi
# Clone the repo and return the return code from this command
git clone -q --depth 20 "${remoteRepo}" "${directory}" &> /dev/null || return $?
# Move into the directory that was passed as an argument
pushd "${directory}" &> /dev/null || return 1
# Check current branch. If it is master, then reset to the latest available tag.
# In case extra commits have been added after tagging/release (i.e in case of metadata updates/README.MD tweaks)
curBranch=$(git rev-parse --abbrev-ref HEAD)
if [[ "${curBranch}" == "master" ]]; then
# If we're calling make_repo() then it should always be master, we may not need to check.
git reset --hard "$(git describe --abbrev=0 --tags)" || return $?
fi
# Show a colored message showing it's status
printf "%b %b %s\\n" "${OVER}" "${TICK}" "${str}"
# Data in the repositories is public anyway so we can make it readable by everyone (+r to keep executable permission if already set by git)
chmod -R a+rX "${directory}"
# Move back into the original directory
popd &> /dev/null || return 1
return 0
}
# We need to make sure the repos are up-to-date so we can effectively install Clean out the directory if it exists for git to clone into
update_repo() {
# Use named, local variables
# As you can see, these are the same variable names used in the last function,
# but since they are local, their scope does not go beyond this function
# This helps prevent the wrong value from being assigned if you were to set the variable as a GLOBAL one
local directory="${1}"
local curBranch
# A variable to store the message we want to display;
# Again, it's useful to store these in variables in case we need to reuse or change the message;
# we only need to make one change here
local str="Update repo in ${1}"
# Move into the directory that was passed as an argument
pushd "${directory}" &> /dev/null || return 1
# Let the user know what's happening
printf " %b %s..." "${INFO}" "${str}"
# Stash any local commits as they conflict with our working code
git stash --all --quiet &> /dev/null || true # Okay for stash failure
git clean --quiet --force -d || true # Okay for already clean directory
# Pull the latest commits
git pull --no-rebase --quiet &> /dev/null || return $?
# Check current branch. If it is master, then reset to the latest available tag.
# In case extra commits have been added after tagging/release (i.e in case of metadata updates/README.MD tweaks)
curBranch=$(git rev-parse --abbrev-ref HEAD)
if [[ "${curBranch}" == "master" ]]; then
git reset --hard "$(git describe --abbrev=0 --tags)" || return $?
fi
# Show a completion message
printf "%b %b %s\\n" "${OVER}" "${TICK}" "${str}"
# Data in the repositories is public anyway so we can make it readable by everyone (+r to keep executable permission if already set by git)
chmod -R a+rX "${directory}"
# Move back into the original directory
popd &> /dev/null || return 1
return 0
}
# A function that combines the previous git functions to update or clone a repo
getGitFiles() {
# Setup named variables for the git repos
# We need the directory
local directory="${1}"
# as well as the repo URL
local remoteRepo="${2}"
# A local variable containing the message to be displayed
local str="Check for existing repository in ${1}"
# Show the message
printf " %b %s..." "${INFO}" "${str}"
# Check if the directory is a repository
if is_repo "${directory}"; then
# Show that we're checking it
printf "%b %b %s\\n" "${OVER}" "${TICK}" "${str}"
# Update the repo, returning an error message on failure
update_repo "${directory}" || { printf "\\n %b: Could not update local repository. Contact support.%b\\n" "${COL_LIGHT_RED}" "${COL_NC}"; exit 1; }
# If it's not a .git repo,
else
# Show an error
printf "%b %b %s\\n" "${OVER}" "${CROSS}" "${str}"
# Attempt to make the repository, showing an error on failure
make_repo "${directory}" "${remoteRepo}" || { printf "\\n %bError: Could not update local repository. Contact support.%b\\n" "${COL_LIGHT_RED}" "${COL_NC}"; exit 1; }
fi
echo ""
# Success via one of the two branches, as the commands would exit if they failed.
return 0
}
# Reset a repo to get rid of any local changed
resetRepo() {
# Use named variables for arguments
local directory="${1}"
# Move into the directory
pushd "${directory}" &> /dev/null || return 1
# Store the message in a variable
str="Resetting repository within ${1}..."
# Show the message
printf " %b %s..." "${INFO}" "${str}"
# Use git to remove the local changes
git reset --hard &> /dev/null || return $?
# Data in the repositories is public anyway so we can make it readable by everyone (+r to keep executable permission if already set by git)
chmod -R a+rX "${directory}"
# And show the status
printf "%b %b %s\\n" "${OVER}" "${TICK}" "${str}"
# Return to where we came from
popd &> /dev/null || return 1
# Function succeeded, as "git reset" would have triggered a return earlier if it failed
return 0
}
find_IPv4_information() {
# Detects IPv4 address used for communication to WAN addresses.
# Accepts no arguments, returns no values.
# Named, local variables
local route
local IPv4bare
# Find IP used to route to outside world by checking the the route to Google's public DNS server
route=$(ip route get 8.8.8.8)
# Get just the interface IPv4 address
# shellcheck disable=SC2059,SC2086
# disabled as we intentionally want to split on whitespace and have printf populate
# the variable with just the first field.
printf -v IPv4bare "$(printf ${route#*src })"
if ! valid_ip "${IPv4bare}" ; then
IPv4bare="127.0.0.1"
fi
# Append the CIDR notation to the IP address, if valid_ip fails this should return 127.0.0.1/8
IPV4_ADDRESS=$(ip -oneline -family inet address show | grep "${IPv4bare}/" | awk '{print $4}' | awk 'END {print}')
}
# Get available interfaces that are UP
get_available_interfaces() {
# There may be more than one so it's all stored in a variable
availableInterfaces=$(ip --oneline link show up | grep -v "lo" | awk '{print $2}' | cut -d':' -f1 | cut -d'@' -f1)
}
# A function for displaying the dialogs the user sees when first running the installer
welcomeDialogs() {
# Display the welcome dialog using an appropriately sized window via the calculation conducted earlier in the script
dialog --no-shadow --clear --keep-tite \
--backtitle "Welcome" \
--title "Pi-hole Automated Installer" \
--msgbox "\\n\\nThis installer will transform your device into a network-wide ad blocker!" \
"${r}" "${c}" \
--and-widget --clear \
--backtitle "Support Pi-hole" \
--title "Open Source Software" \
--msgbox "\\n\\nThe Pi-hole is free, but powered by your donations: https://pi-hole.net/donate/" \
"${r}" "${c}" \
--and-widget --clear \
--colors \
--backtitle "Initiating network interface" \
--title "Static IP Needed" \
--no-button "Exit" --yes-button "Continue" \
--defaultno \
--yesno "\\n\\nThe Pi-hole is a SERVER so it needs a STATIC IP ADDRESS to function properly.\\n\\n\
\\Zb\\Z1IMPORTANT:\\Zn If you have not already done so, you must ensure that this device has a static IP.\\n\\n\
Depending on your operating system, there are many ways to achieve this, through DHCP reservation, or by manually assigning one.\\n\\n\
Please continue when the static addressing has been configured."\
"${r}" "${c}" && result=0 || result="$?"
case "${result}" in
"${DIALOG_CANCEL}" | "${DIALOG_ESC}")
printf " %b Installer exited at static IP message.\\n" "${INFO}"
exit 1
;;
esac
}
# A function that lets the user pick an interface to use with Pi-hole
chooseInterface() {
# Turn the available interfaces into a string so it can be used with dialog
local interfacesList
# Number of available interfaces
local interfaceCount
# POSIX compliant way to get the number of elements in an array
interfaceCount=$(printf "%s\n" "${availableInterfaces}" | wc -l)
# If there is one interface,
if [[ "${interfaceCount}" -eq 1 ]]; then
# Set it as the interface to use since there is no other option
PIHOLE_INTERFACE="${availableInterfaces}"
# Otherwise,
else
# Set status for the first entry to be selected
status="ON"
# While reading through the available interfaces
for interface in ${availableInterfaces}; do
# Put all these interfaces into a string
interfacesList="${interfacesList}${interface} available ${status} "
# All further interfaces are deselected
status="OFF"
done
# shellcheck disable=SC2086
# Disable check for double quote here as we are passing a string with spaces
PIHOLE_INTERFACE=$(dialog --no-shadow --keep-tite --output-fd 1 \
--cancel-label "Exit" --ok-label "Select" \
--radiolist "Choose An Interface (press space to toggle selection)" \
${r} ${c} "${interfaceCount}" ${interfacesList})
result=$?
case ${result} in
"${DIALOG_CANCEL}"|"${DIALOG_ESC}")
# Show an error message and exit
printf " %b %s\\n" "${CROSS}" "No interface selected, exiting installer"
exit 1
;;
esac
printf " %b Using interface: %s\\n" "${INFO}" "${PIHOLE_INTERFACE}"
fi
}
# This lets us prefer ULA addresses over GUA
# This caused problems for some users when their ISP changed their IPv6 addresses
# See https://github.com/pi-hole/pi-hole/issues/1473#issuecomment-301745953
testIPv6() {
# first will contain fda2 (ULA)
printf -v first "%s" "${1%%:*}"
# value1 will contain 253 which is the decimal value corresponding to 0xFD
value1=$(( (0x$first)/256 ))
# value2 will contain 162 which is the decimal value corresponding to 0xA2
value2=$(( (0x$first)%256 ))
# the ULA test is testing for fc00::/7 according to RFC 4193
if (( (value1&254)==252 )); then
# echoing result to calling function as return value
echo "ULA"
fi
# the GUA test is testing for 2000::/3 according to RFC 4291
if (( (value1&112)==32 )); then
# echoing result to calling function as return value
echo "GUA"
fi
# the LL test is testing for fe80::/10 according to RFC 4193
if (( (value1)==254 )) && (( (value2&192)==128 )); then
# echoing result to calling function as return value
echo "Link-local"
fi
}
find_IPv6_information() {
# Detects IPv6 address used for communication to WAN addresses.
mapfile -t IPV6_ADDRESSES <<<"$(ip -6 address | grep 'scope global' | awk '{print $2}')"
# For each address in the array above, determine the type of IPv6 address it is
for i in "${IPV6_ADDRESSES[@]}"; do
# Check if it's ULA, GUA, or LL by using the function created earlier
result=$(testIPv6 "$i")
# If it's a ULA address, use it and store it as a global variable
[[ "${result}" == "ULA" ]] && ULA_ADDRESS="${i%/*}"
# If it's a GUA address, use it and store it as a global variable
[[ "${result}" == "GUA" ]] && GUA_ADDRESS="${i%/*}"
# Else if it's a Link-local address, we cannot use it, so just continue
done
# Determine which address to be used: Prefer ULA over GUA or don't use any if none found
# If the ULA_ADDRESS contains a value,
if [[ -n "${ULA_ADDRESS}" ]]; then
# set the IPv6 address to the ULA address
IPV6_ADDRESS="${ULA_ADDRESS}"
# Show this info to the user
printf " %b Found IPv6 ULA address\\n" "${INFO}"
# Otherwise, if the GUA_ADDRESS has a value,
elif [[ -n "${GUA_ADDRESS}" ]]; then
# Let the user know
printf " %b Found IPv6 GUA address\\n" "${INFO}"
# And assign it to the global variable
IPV6_ADDRESS="${GUA_ADDRESS}"
# If none of those work,
else
printf " %b Unable to find IPv6 ULA/GUA address\\n" "${INFO}"
# So set the variable to be empty
IPV6_ADDRESS=""
fi
}
# A function to collect IPv4 and IPv6 information of the device
collect_v4andv6_information() {
find_IPv4_information
printf " %b IPv4 address: %s\\n" "${INFO}" "${IPV4_ADDRESS}"
find_IPv6_information
printf " %b IPv6 address: %s\\n" "${INFO}" "${IPV6_ADDRESS}"
}
# Check an IP address to see if it is a valid one
valid_ip() {
# Local, named variables
local ip=${1}
local stat=1
# Regex matching one IPv4 component, i.e. an integer from 0 to 255.
# See https://tools.ietf.org/html/rfc1340
local ipv4elem="(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]?|0)";
# Regex matching an optional port (starting with '#') range of 1-65536
local portelem="(#(6553[0-5]|655[0-2][0-9]|65[0-4][0-9]{2}|6[0-4][0-9]{3}|[1-5][0-9]{4}|[1-9][0-9]{0,3}|0))?";
# Build a full IPv4 regex from the above subexpressions
local regex="^${ipv4elem}\\.${ipv4elem}\\.${ipv4elem}\\.${ipv4elem}${portelem}$"
# Evaluate the regex, and return the result
[[ $ip =~ ${regex} ]]
stat=$?
return "${stat}"
}
valid_ip6() {
local ip=${1}
local stat=1
# Regex matching one IPv6 element, i.e. a hex value from 0000 to FFFF
local ipv6elem="[0-9a-fA-F]{1,4}"
# Regex matching an IPv6 CIDR, i.e. 1 to 128
local v6cidr="(\\/([1-9]|[1-9][0-9]|1[0-1][0-9]|12[0-8])){0,1}"
# Regex matching an optional port (starting with '#') range of 1-65536
local portelem="(#(6553[0-5]|655[0-2][0-9]|65[0-4][0-9]{2}|6[0-4][0-9]{3}|[1-5][0-9]{4}|[1-9][0-9]{0,3}|0))?";
# Build a full IPv6 regex from the above subexpressions
local regex="^(((${ipv6elem}))*((:${ipv6elem}))*::((${ipv6elem}))*((:${ipv6elem}))*|((${ipv6elem}))((:${ipv6elem})){7})${v6cidr}${portelem}$"
# Evaluate the regex, and return the result
[[ ${ip} =~ ${regex} ]]
stat=$?
return "${stat}"
}
# A function to choose the upstream DNS provider(s)
setDNS() {
# Local, named variables
local DNSSettingsCorrect
# In an array, list the available upstream providers
DNSChooseOptions=()
local DNSServerCount=0
# Save the old Internal Field Separator in a variable,
OIFS=$IFS
# and set the new one to newline
IFS=$'\n'
# Put the DNS Servers into an array
for DNSServer in ${DNS_SERVERS}
do
DNSName="$(cut -d';' -f1 <<< "${DNSServer}")"
DNSChooseOptions[DNSServerCount]="${DNSName}"
(( DNSServerCount=DNSServerCount+1 ))
DNSChooseOptions[DNSServerCount]=""
(( DNSServerCount=DNSServerCount+1 ))
done
DNSChooseOptions[DNSServerCount]="Custom"
(( DNSServerCount=DNSServerCount+1 ))
DNSChooseOptions[DNSServerCount]=""
# Restore the IFS to what it was
IFS=${OIFS}
# In a dialog, show the options
DNSchoices=$(dialog --no-shadow --keep-tite --output-fd 1 \
--cancel-label "Exit" \
--menu "Select Upstream DNS Provider. To use your own, select Custom." "${r}" "${c}" 7 \
"${DNSChooseOptions[@]}")
result=$?
case ${result} in
"${DIALOG_CANCEL}" | "${DIALOG_ESC}")
printf " %b Cancel was selected, exiting installer%b\\n" "${COL_LIGHT_RED}" "${COL_NC}"
exit 1
;;
esac
# Depending on the user's choice, set the GLOBAL variables to the IP of the respective provider
if [[ "${DNSchoices}" == "Custom" ]]
then
# Loop until we have a valid DNS setting
until [[ "${DNSSettingsCorrect}" = True ]]; do
# Signal value, to be used if the user inputs an invalid IP address
strInvalid="Invalid"
if [[ ! "${PIHOLE_DNS_1}" ]]; then
if [[ ! "${PIHOLE_DNS_2}" ]]; then
# If the first and second upstream servers do not exist, do not prepopulate an IP address
prePopulate=""
else
# Otherwise, prepopulate the dialogue with the appropriate DNS value(s)
prePopulate=", ${PIHOLE_DNS_2}"
fi
elif [[ "${PIHOLE_DNS_1}" ]] && [[ ! "${PIHOLE_DNS_2}" ]]; then
prePopulate="${PIHOLE_DNS_1}"
elif [[ "${PIHOLE_DNS_1}" ]] && [[ "${PIHOLE_DNS_2}" ]]; then
prePopulate="${PIHOLE_DNS_1}, ${PIHOLE_DNS_2}"
fi
# Prompt the user to enter custom upstream servers
piholeDNS=$(dialog --no-shadow --keep-tite --output-fd 1 \
--cancel-label "Exit" \
--backtitle "Specify Upstream DNS Provider(s)" \
--inputbox "Enter your desired upstream DNS provider(s), separated by a comma.\
If you want to specify a port other than 53, separate it with a hash.\
\\n\\nFor example '8.8.8.8, 8.8.4.4' or '127.0.0.1#5335'"\
"${r}" "${c}" "${prePopulate}")
result=$?
case ${result} in
"${DIALOG_CANCEL}" | "${DIALOG_ESC}")
printf " %b Cancel was selected, exiting installer%b\\n" "${COL_LIGHT_RED}" "${COL_NC}"
exit 1
;;
esac
# Clean user input and replace whitespace with comma.
piholeDNS=$(sed 's/[, \t]\+/,/g' <<< "${piholeDNS}")
# Separate the user input into the two DNS values (separated by a comma)
printf -v PIHOLE_DNS_1 "%s" "${piholeDNS%%,*}"
printf -v PIHOLE_DNS_2 "%s" "${piholeDNS##*,}"
# If the first DNS value is invalid or empty, this if statement will be true and we will set PIHOLE_DNS_1="Invalid"
if ! valid_ip "${PIHOLE_DNS_1}" || [[ ! "${PIHOLE_DNS_1}" ]]; then
PIHOLE_DNS_1=${strInvalid}
fi
# If the second DNS value is invalid or empty, this if statement will be true and we will set PIHOLE_DNS_2="Invalid"
if ! valid_ip "${PIHOLE_DNS_2}" && [[ "${PIHOLE_DNS_2}" ]]; then
PIHOLE_DNS_2=${strInvalid}
fi
# If either of the DNS servers are invalid,
if [[ "${PIHOLE_DNS_1}" == "${strInvalid}" ]] || [[ "${PIHOLE_DNS_2}" == "${strInvalid}" ]]; then
# explain this to the user,
dialog --no-shadow --keep-tite \
--title "Invalid IP Address(es)" \
--backtitle "Invalid IP" \
--msgbox "\\nOne or both of the entered IP addresses were invalid. Please try again.\
\\n\\nInvalid IPs: ${PIHOLE_DNS_1}, ${PIHOLE_DNS_2}" \
"${r}" "${c}"
# set the variables back to nothing,
if [[ "${PIHOLE_DNS_1}" == "${strInvalid}" ]]; then
PIHOLE_DNS_1=""
fi
if [[ "${PIHOLE_DNS_2}" == "${strInvalid}" ]]; then
PIHOLE_DNS_2=""
fi
# and continue the loop.
DNSSettingsCorrect=False
else
dialog --no-shadow --no-collapse --keep-tite \
--backtitle "Specify Upstream DNS Provider(s)" \
--title "Upstream DNS Provider(s)" \
--yesno "Are these settings correct?\\n"$'\t'"DNS Server 1:"$'\t'"${PIHOLE_DNS_1}\\n"$'\t'"DNS Server 2:"$'\t'"${PIHOLE_DNS_2}" \
"${r}" "${c}" && result=0 || result=$?
case ${result} in
"${DIALOG_OK}")
DNSSettingsCorrect=True
;;
"${DIALOG_CANCEL}")
DNSSettingsCorrect=False
;;
"${DIALOG_ESC}")
printf " %b Escape pressed, exiting installer at DNS Settings%b\\n" "${COL_LIGHT_RED}" "${COL_NC}"
exit 1
;;
esac
fi
done
else
# Save the old Internal Field Separator in a variable,
OIFS=$IFS
# and set the new one to newline
IFS=$'\n'
for DNSServer in ${DNS_SERVERS}
do
DNSName="$(cut -d';' -f1 <<< "${DNSServer}")"
if [[ "${DNSchoices}" == "${DNSName}" ]]
then
PIHOLE_DNS_1="$(cut -d';' -f2 <<< "${DNSServer}")"
PIHOLE_DNS_2="$(cut -d';' -f3 <<< "${DNSServer}")"
break
fi
done
# Restore the IFS to what it was
IFS=${OIFS}
fi
# Display final selection
local DNSIP=${PIHOLE_DNS_1}
[[ -z ${PIHOLE_DNS_2} ]] || DNSIP+=", ${PIHOLE_DNS_2}"
printf " %b Using upstream DNS: %s (%s)\\n" "${INFO}" "${DNSchoices}" "${DNSIP}"
}
# Allow the user to enable/disable logging
setLogging() {
# Ask the user if they want to enable logging
dialog --no-shadow --keep-tite \
--backtitle "Pihole Installation" \
--title "Enable Logging" \
--yesno "\\n\\nWould you like to enable query logging?" \
"${r}" "${c}" && result=0 || result=$?
case ${result} in
"${DIALOG_OK}")
# If they chose yes,
printf " %b Query Logging on.\\n" "${INFO}"
QUERY_LOGGING=true
;;
"${DIALOG_CANCEL}")
# If they chose no,
printf " %b Query Logging off.\\n" "${INFO}"
QUERY_LOGGING=false
;;
"${DIALOG_ESC}")
# User pressed <ESC>
printf " %b Escape pressed, exiting installer at Query Logging choice.%b\\n" "${COL_LIGHT_RED}" "${COL_NC}"
exit 1
;;
esac
}
# Allow the user to set their FTL privacy level
setPrivacyLevel() {
# The default selection is level 0
PRIVACY_LEVEL=$(dialog --no-shadow --keep-tite --output-fd 1 \
--cancel-label "Exit" \
--ok-label "Continue" \
--radiolist "Select a privacy mode for FTL. https://docs.pi-hole.net/ftldns/privacylevels/" \
"${r}" "${c}" 6 \
"0" "Show everything" on \
"1" "Hide domains" off \
"2" "Hide domains and clients" off \
"3" "Anonymous mode" off)
result=$?
case ${result} in
"${DIALOG_OK}")
printf " %b Using privacy level: %s\\n" "${INFO}" "${PRIVACY_LEVEL}"
;;
"${DIALOG_CANCEL}" | "${DIALOG_ESC}")
printf " %b Cancelled privacy level selection.%b\\n" "${COL_LIGHT_RED}" "${COL_NC}"
exit 1
;;
esac
}
# A function to display a list of example blocklists for users to select
chooseBlocklists() {
# Back up any existing adlist file, on the off chance that it exists. Useful in case of a reconfigure.
if [[ -f "${adlistFile}" ]]; then
mv "${adlistFile}" "${adlistFile}.old"
fi
# Let user select (or not) blocklists
dialog --no-shadow --keep-tite \
--backtitle "Pi-hole Installation" \
--title "Blocklists" \
--yesno "\\nPi-hole relies on third party lists in order to block ads.\
\\n\\nYou can use the suggestion below, and/or add your own after installation.\
\\n\\nSelect 'Yes' to include:\
\\n\\nStevenBlack's Unified Hosts List" \
"${r}" "${c}" && result=0 || result=$?
case ${result} in
"${DIALOG_OK}")
# If they chose yes,
printf " %b Installing StevenBlack's Unified Hosts List\\n" "${INFO}"
echo "https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts" >> "${adlistFile}"
;;
"${DIALOG_CANCEL}")
# If they chose no,
printf " %b Not installing StevenBlack's Unified Hosts List\\n" "${INFO}"
;;
"${DIALOG_ESC}")
# User pressed <ESC>
printf " %b Escape pressed, exiting installer at blocklist choice.%b\\n" "${COL_LIGHT_RED}" "${COL_NC}"
exit 1
;;
esac
# Create an empty adList file with appropriate permissions.
if [ ! -f "${adlistFile}" ]; then
install -m 644 /dev/null "${adlistFile}"
else
chmod 644 "${adlistFile}"
fi
}
# Used only in unattended setup
# If there is already the adListFile, we keep it, else we create it using all default lists
installDefaultBlocklists() {
# In unattended setup, could be useful to use userdefined blocklist.
# If this file exists, we avoid overriding it.
if [[ -f "${adlistFile}" ]]; then
return;
fi
echo "https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts" >> "${adlistFile}"
}
remove_old_dnsmasq_ftl_configs() {
# Local, named variables
local dnsmasq_conf="/etc/dnsmasq.conf"
local pihole_01="/etc/dnsmasq.d/01-pihole.conf"