Fix logrotation: manual flushing should be done twice, but automated rotation at midnight should only be done *once*!

advanced/Scripts/piholeLogFlush.sh

@@ -9,16 +9,32 @@
 # Please see LICENSE file for your rights under this license.
 
 echo -n "::: Flushing /var/log/pihole.log ..."
-# Test if logrotate is available on this system
-if command -v /usr/sbin/logrotate >/dev/null; then
-  # Flush twice to move all data out of sight of FTL
+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
+  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
 echo "... done!"

advanced/pihole.cron

@@ -24,6 +24,6 @@
 # Pi-hole: Flush the log daily at 00:00 so it doesn't get out of control
 #          Stats will be viewable in the Web interface thanks to the cron job above
 #          The flush script will use logrotate if available
-00 00   * * *   root    PATH="$PATH:/usr/local/bin/" pihole flush
+00 00   * * *   root    PATH="$PATH:/usr/local/bin/" pihole flush once
 
 @reboot root /usr/sbin/logrotate /etc/pihole/logrotate

pihole

@@ -61,7 +61,7 @@ debugFunc() {
 }
 
 flushFunc() {
-  "${PI_HOLE_SCRIPT_DIR}"/piholeLogFlush.sh
+  "${PI_HOLE_SCRIPT_DIR}"/piholeLogFlush.sh "$@"
   exit 0
 }
 
@@ -353,7 +353,7 @@ case "${1}" in
   "-b" | "blacklist"            ) blacklistFunc "$@";;
   "-wild" | "wildcard"          ) wildcardFunc "$@";;
   "-d" | "debug"                ) debugFunc "$@";;
-  "-f" | "flush"                ) flushFunc;;
+  "-f" | "flush"                ) flushFunc "$@";;
   "-up" | "updatePihole"        ) updatePiholeFunc;;
   "-r"  | "reconfigure"         ) reconfigurePiholeFunc;;
   "-g" | "updateGravity"        ) updateGravityFunc "$@";;