diff --git a/ProxmoxTimedShutdown.sh b/ProxmoxTimedShutdown.sh
index 2421a50..a3bc431 100644
--- a/ProxmoxTimedShutdown.sh
+++ b/ProxmoxTimedShutdown.sh
@@ -1,12 +1,36 @@
 #!/bin/bash
 
-echo "Waiting 1hr to allow user to cancel shutdown"
+LOGFILE="/var/log/timedshutdown.log"
+touch $LOGFILE
+
+# Log file #################################################################
+log () {
+        TIMEDATE=$(date +%Y/%m/%d_%H:%M:%S)
+        echo "$TIMEDATE $1" >> $LOGFILE
+}
+
+if [ `cat $LOGFILE | wc -l` -ge 100 ]; then
+        >$LOGFILE
+        log "Log file was rotated"
+fi
+############################################################################
+
+log "Waiting 1hr to allow user to cancel shutdown"
 sleep 1h
 
-if [ `ps -ef | grep vzdump | wc -l` -eq 1 ]; then
-        echo "Triggering scheduled post-backup shutdown"
-        /usr/sbin/shutdown -h now
-else
-        echo "Automatic shutdown not triggered due to concurrent backup task"
-        exit 2
-fi
\ No newline at end of file
+# Main loop ################################################################
+for i in 1 2 3 4
+do
+        if [ `ps -ef | grep vzdump | wc -l` -eq 1 ]; then
+                log "Triggering scheduled post-backup shutdown"
+                /usr/sbin/shutdown -h now
+                exit 1
+        else
+                log "Automatic shutdown delayed due to concurrent backup task"
+                sleep 15m
+        fi
+done
+
+log "Automatic shutdown cancelled due to concurrent backup task"
+exit 2
+############################################################################
\ No newline at end of file