pi-hole/advanced/Scripts/piholeLogFlush.sh

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#!/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.
if [[ "$@" != *"quiet"* ]]; then
echo -n "::: Flushing /var/log/pihole.log ..."
fi
if [[ "$@" == *"once"* ]]; then
# Nightly logrotation
if command -v /usr/sbin/logrotate >/dev/null; then
# Logrotate once
/usr/sbin/logrotate --force /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 /var/log/pihole.log /var/log/pihole.log.1
echo " " > /var/log/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 /etc/pihole/logrotate; sleep 3
/usr/sbin/logrotate --force /etc/pihole/logrotate
else
# Flush both pihole.log and pihole.log.1 (if existing)
echo " " > /var/log/pihole.log
if [ -f /var/log/pihole.log.1 ]; then
echo " " > /var/log/pihole.log.1
fi
fi
fi
if [[ "$@" != *"quiet"* ]]; then
echo "... done!"
fi