#!/bin/ksh
 
configure() {
        COMMAND="process.bin"              # Name of the process being monitored
        CPULIMIT=99                             # CPU threshold
        LOOP=10                                   # Monitor process every so many seconds
        INTERVAL_DURATION=1                # Take CPU utilization readings every so many seconds
        INTERVAL_COUNT="0 1 2 3 4"         # Calculate average based on this many readings
}
 
pid() {
        PID=99999999
        PID=$(ps -ef | grep $COMMAND | grep -v grep | awk '{print $2}' | sort | uniq | tail -1)
}
 
cpu() {
        CPU=0
        CPUAVG=0
        CPU=$(top -b -n 1 -p $PID | grep $COMMAND | awk '{print $9}')
 
        if [ $CPU -ge $CPULIMIT ]
        then
                for i in $INTERVAL_COUNT        # If CPU load exceeds $CPULIMIT, determine average CPU load
                do
                        array[$i]=$(top -b -n 1 -p $PID | grep $COMMAND | awk '{print $9}')
                        sleep $INTERVAL_DURATION
                done
 
                CPUAVG=$(echo "scale = 0 ; (${array[0]}+${array[1]}+${array[2]}+${array[3]}+${array[4]})/5" | bc -l)
        fi
}
 
terminate() {
        if [ $CPUAVG -ge $CPULIMIT ]
        then
                kill -9 $PID
                echo "Killed $PID at `date`"
        fi
}
 
# -------------------------------
# RUNTIME
# -------------------------------
configure               # Configure script parameters
 
i=1
while [ $i -eq 1 ]      # Run script in a loop every $LOOP seconds
do
        pid             # Aquire unique PID of the $COMMAND
        cpu             # Determine current CPU load for the $COMMAND
        terminate       # Kill $COMMAND if $CPULIMIT is exceeded
        sleep $LOOP
done