#!/usr/bin/env bash
# Pi-hole: A black hole for Internet advertisements
# (c) 2017 Pi-hole, LLC (https://pi-hole.net)
# Network-wide ad blocking via your own hardware.
#
# Flushes Pi-hole's log file
#
# This file is copyright under the latest version of the EUPL.
# Please see LICENSE file for your rights under this license.
colfile = "/opt/pihole/COL_TABLE"
source ${ colfile }
# In case we're running at the same time as a system logrotate, use a
# separate logrotate state file to prevent stepping on each other's
# toes.
STATEFILE = "/var/lib/logrotate/pihole"
# Determine database location
# Obtain DBFILE=... setting from pihole-FTL.db
# Constructed to return nothing when
# a) the setting is not present in the config file, or
# b) the setting is commented out (e.g. "#DBFILE=...")
FTLconf = "/etc/pihole/pihole-FTL.conf"
if [ -e " $FTLconf " ] ; then
DBFILE = " $( sed -n -e 's/^\s*DBFILE\s*=\s*//p' ${ FTLconf } ) "
fi
# Test for empty string. Use standard path in this case.
if [ -z " $DBFILE " ] ; then
DBFILE = "/etc/pihole/pihole-FTL.db"
fi
if [ [ " $@ " != *"quiet" * ] ] ; then
echo -ne " ${ INFO } Flushing /var/log/pihole/pihole.log ... "
fi
if [ [ " $@ " = = *"once" * ] ] ; then
# Nightly logrotation
if command -v /usr/sbin/logrotate >/dev/null; then
# Logrotate once
/usr/sbin/logrotate --force --state " ${ STATEFILE } " /etc/pihole/logrotate
else
# Copy pihole.log over to pihole.log.1
# and empty out pihole.log
# Note that moving the file is not an option, as
# dnsmasq would happily continue writing into the
# moved file (it will have the same file handler)
cp -p /var/log/pihole/pihole.log /var/log/pihole/pihole.log.1
echo " " > /var/log/pihole/pihole.log
chmod 640 /var/log/pihole/pihole.log
fi
else
# Manual flushing
if command -v /usr/sbin/logrotate >/dev/null; then
# Logrotate twice to move all data out of sight of FTL
/usr/sbin/logrotate --force --state " ${ STATEFILE } " /etc/pihole/logrotate; sleep 3
/usr/sbin/logrotate --force --state " ${ STATEFILE } " /etc/pihole/logrotate
else
# Flush both pihole.log and pihole.log.1 (if existing)
echo " " > /var/log/pihole/pihole.log
if [ -f /var/log/pihole/pihole.log.1 ] ; then
echo " " > /var/log/pihole/pihole.log.1
chmod 640 /var/log/pihole/pihole.log.1
fi
fi
# Delete most recent 24 hours from FTL's database, leave even older data intact (don't wipe out all history)
deleted = $( pihole-FTL sqlite3 " ${ DBFILE } " "DELETE FROM query_storage WHERE timestamp >= strftime('%s','now')-86400; select changes() from query_storage limit 1" )
# Restart pihole-FTL to force reloading history
sudo pihole restartdns
fi
if [ [ " $@ " != *"quiet" * ] ] ; then
echo -e " ${ OVER } ${ TICK } Flushed /var/log/pihole/pihole.log "
echo -e " ${ TICK } Deleted ${ deleted } queries from database "
fi