Log Monitor

logmonitor.sh

#!/bin/sh

if [ $# -eq 0 ]; then
	echo "Usage: ./monitor.sh /my/log/file.log [sleep time (s)]"
	echo "Will output a dot for each second monitored that there are no changes"
	echo "Will stop script once no changes are detected to log file"
fi

if [ $# -eq 1 ]; then
	LOGFILE=$1
fi

SLEEPTIME=1 #Default sleep time
if [ $# -eq 2 ]; then
	LOGFILE=$1
	SLEEPTIME=$2
fi

echo "Monitoring $LOGFILE"

ACAPTURE="A"
BCAPTURE="B"
echo "Checking logfile differences every $SLEEPTIME second(s), will stop script once no changes are detected"
echo -n "Start at: " && date

while [[ "$ACAPTURE" != "$BCAPTURE" ]]; do
	echo -n "." #Progress indicator that the script is running.
	ACAPTURE=`tail $LOGFILE`
	sleep $SLEEPTIME;
	BCAPTURE=`tail $LOGFILE`
done

echo "" #move down from the dots
echo "No update to log file in last $SLEEPTIME second(s), stopping script"
echo -n "Stopped at: "
date