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pi-hole/advanced/Scripts/whitelist.sh
Jacob Salmela 57282cfe16 ugly hack to whitelist from the Web interface
I wanted the whitelist feature to keep the user on the same page
without having to reload it.  I'm sure someone better versed in PHP
could eliminate the need for this hack.  Nonetheless, it works.

www-data runs the script if executed from the Web interface.  www-data
also needs access to write to /etc/pihole/gravity.list to actually
remove the domain.  So a few more things need to happen before this
will fully work.

The changes in this script won't change what is displayed if run from
the terminal, but will help when it needs to be run from the Web
interface, so I am just committing this now.

The only other thing I would like to see would be a progress spinner,
but my Web skills still need some work...
2015-12-09 15:16:34 -06:00

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#!/usr/bin/env bash
# (c) 2015 by Jacob Salmela
# This file is part of Pi-hole.
#
# 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.
whitelist=/etc/pihole/whitelist.txt
adList=/etc/pihole/gravity.list
webInterfaceEchos=/tmp/whitelistEchoFile
if [[ ! -f $whitelist ]];then
touch $whitelist
fi
formatEchoes()
{
if [[ "$(whoami)" = "www-data" ]];then
echo "$1" >> $webInterfaceEchos
else
echo "$1"
fi
}
if [[ $# = 0 ]]; then
# echoes go to a file for showing in the Web interface
echo "Immediately whitelists one or more domains."
echo "Usage: whitelist.sh domain1 [domain2 ...]"
if [[ "$(whoami)" = "www-data" ]];then
formatEchoes "Enter one or more space-separated FQDN."
# If the user is www-data, the script is probably being called from the Web interface
# Since the Web interface only displays the last echo in the script (I'm still a n00b with PHP)
webInterfaceDisplay=$(cat $webInterfaceEchos)
# The last echo needs to be delimited by a semi-colon so I translate newlines into semi-colons so it displays properly
# Someone better in PHP might be able to come up with a better solution, but this is a highly-requested feature
# This is also used later in the script, too
echo "$webInterfaceDisplay" | tr "\n" ";"
fi
fi
combopattern=""
# Overwrite any previously existing file so the output is always correct
echo "" > $webInterfaceEchos
# For each argument passed to this script
for var in "$@"
do
# Start appending the echoes into the file for display in the Web interface later
formatEchoes "Whitelisting $var..."
# Construct basic pattern to match domain name.
basicpattern=$(echo $var | awk -F '[# \t]' 'NF>0&&$1!="" {print ""$1""}' | sed 's/\./\\./g')
if [[ "$basicpattern" != "" ]]; then
# Add to the combination pattern that will be used below
if [[ "$combopattern" != "" ]]; then combopattern="$combopattern|"; fi
combopattern="$combopattern$basicpattern"
# Also add the domain to the whitelist but only if it's not already present
grep -E -q "^$basicpattern$" $whitelist \
|| echo "$var" >> $whitelist
fi
done
# Now report on and remove matched domains
if [[ "$combopattern" != "" ]]; then
formatEchoes "Modifying hosts file..."
# Construct pattern to match entry in hosts file.
# This consists of one or more IP addresses followed by the domain name.
pattern=$(echo $combopattern | awk -F '[# \t]' '{printf "%s", "^(([0-9]+\.){3}[0-9]+ +)+("$1")$"}')
# Output what will be removed and then actually remove
sed -r -n 's/'"$pattern"'/ Removed: \3/p' $adList
sed -r -i '/'"$pattern"'/d' $adList
formatEchoes "** $# domain(s) whitelisted."
# Only echo the semi-colon delimited echoes if the user running the script is www-data (meaning it is run the from Web interface)
if [[ "$(whoami)" = "www-data" ]];then
webInterfaceDisplay=$(cat $webInterfaceEchos)
echo "$webInterfaceDisplay" | tr "\n" ";"
fi
# Force dnsmasq to reload /etc/pihole/gravity.list
kill -HUP $(pidof dnsmasq)
fi