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pi-hole/advanced/Scripts/piholeLogRotate.sh
Christian König 12342682b4
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Separate log flush from log rotate
Signed-off-by: Christian König <github@yubiuser.dev>
2025-10-21 20:47:53 +02:00

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2.2 KiB
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#!/usr/bin/env bash
# Pi-hole: A black hole for Internet advertisements
# (c) 2025 Pi-hole, LLC (https://pi-hole.net)
# Network-wide ad blocking via your own hardware.
#
# Rotate 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"
# shellcheck source="./advanced/Scripts/COL_TABLE"
source ${colfile}
readonly PI_HOLE_SCRIPT_DIR="/opt/pihole"
utilsfile="${PI_HOLE_SCRIPT_DIR}/utils.sh"
# shellcheck source="./advanced/Scripts/utils.sh"
source "${utilsfile}"
# In case we're running at the same time as a system logrotate, use a
# separate logrotate state file to prevent stepping on each other's
# toes.
STATEFILE="/var/lib/logrotate/pihole"
# Determine log file location
LOGFILE=$(getFTLConfigValue "files.log.dnsmasq")
if [ -z "$LOGFILE" ]; then
LOGFILE="/var/log/pihole/pihole.log"
fi
FTLFILE=$(getFTLConfigValue "files.log.ftl")
if [ -z "$FTLFILE" ]; then
FTLFILE="/var/log/pihole/FTL.log"
fi
WEBFILE=$(getFTLConfigValue "files.log.webserver")
if [ -z "$WEBFILE" ]; then
WEBFILE="/var/log/pihole/webserver.log"
fi
# Helper function to handle log rotation for a single file
rotate_log() {
# This function copies x.log over to x.log.1
# and then empties x.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)
local logfile="$1"
if [[ "$*" != *"quiet"* ]]; then
echo -ne " ${INFO} Rotating ${logfile} ..."
fi
cp -p "${logfile}" "${logfile}.1"
echo " " > "${logfile}"
chmod 640 "${logfile}"
if [[ "$*" != *"quiet"* ]]; then
echo -e "${OVER} ${TICK} Rotated ${logfile} ..."
fi
}
# Nightly logrotation
if command -v /usr/sbin/logrotate >/dev/null; then
# Logrotate once
if [[ "$*" != *"quiet"* ]]; then
echo -ne " ${INFO} Running logrotate ..."
fi
mkdir -p "${STATEFILE%/*}"
/usr/sbin/logrotate --force --state "${STATEFILE}" /etc/pihole/logrotate
else
# Handle rotation for each log file
rotate_log "${LOGFILE}"
rotate_log "${FTLFILE}"
rotate_log "${WEBFILE}"
fi