Shell Programming and Scripting

#!/bin/csh


if ( "$USER" != "root" ) then
    


echo "Measuring CPU load"


# ut1 and ut2 finds the %usage of the cpu for user and system. $ut makes them into one number
top -n 2 | grep 'Cpu(s)' | tail -1 > /tmp/cpuinfo.patrol.$$
set filename="/tmp/cpuinfo.patrol.$$"
chmod +rwx $filename
set ut1=`cat $filename | awk '{print $2}' | sed -e 's/\..*//'`
set ut2=`cat $filename | awk '{print $3}' | sed -e 's/\..*//'`
@ ut = ( $ut1 + $ut2 )

# $mu og $m find information of used and free memory on the system
set mu = `free -m | grep cache: | awk '{print $3}'`
set m = `free -m | grep cache: | awk '{print $4}'`
# $c finds %idle cpu.
set c = `cat $filename | awk '{print $5}' | sed -e 's/\%.*//'`
# $tm finds the total memory amount.
set tm = `free -m | grep Mem: | awk '{print $2}'`
# $cu does the same as $c, but filters .xx
set cu = `cat $filename | awk '{print $5}' | sed -e 's/\..*//'`


echo ""
echo ""
echo ""
echo "==================================================="
echo ""
echo "CPU usage: ${ut}%"
echo "Used Memory: ${mu}mb of ${tm}mb"
echo ""
echo  "    You have ${m}MB of free memory available"
echo  "    ${c}% of the total CPU capacity is idle"
echo ""
echo ""
 

if ( "$cu" > "20" ) then
    if ( "$m" < "500" )then
        echo "Starting heavy jobs now might not be a good idea."
    else
        echo "You do not have much cpu capacity available, keep an eye on your memory levels"
    endif
else if ( "$cu" > "20"  &&  "$cu" < "50" ) then
    if ( "$m" < "1000" ) then
        echo "You do not have a lot of cpu or memory capacity available."
    else if  ( "$m" > "1000"  &&  "$m" < "2000" ) then
        echo "You do not have a lot of cpu capacity available, but you do have an acceptable amount of memory."
    else if ( "$m" > "2000" ) then
        echo "You have less than 50% idle cpu capacity, but you do have a good amount of memory available."
    endif
else if ( "$cu" > "50"  &&  "$cu" < "80" ) then
    if ( "$m" < "1000" ) then
        echo "You have a good amount of cpu capacity available, but keep an eye on the memory. "
    else if ( "$m" < "2000"  &&  "$m" > "1000" ) then
        echo "You have a good amount of cpu and memory capacity available."
    else if ( "$m" > "2000" ) then
        echo "You have a good amount of cpu capacity and a good amount of memory available."
    endif
else if ( "$cu" > "80" ) then
    if ( "$m" < "1000" ) then
        echo "You have a lot of idle cpu capacity, but not a lot of memory"
    else if ( "$m" < "2000"  &&  "$m" > "1000" ) then
        echo "You have a lot of idle cpu capacity, and an acceptable amount of free memory."
    else if ( "$m" > "2000" ) then
        echo "You have loads of cpu and memory capacity available"
    endif
endif


echo ""
echo "==================================================="
echo ""
rm $filename
endif

if [ "$cu" \< "20" ]; then
    if [ "$m" \> "500" ];then
        echo "Starting heavy jobs now might not be a good idea."
    else
        echo "You do not have much cpu capacity available, keep an eye on your m
emory levels"
    fi
elif [ "$cu" \> "20"  -a  "$cu" \< "50" ]; then
    if [ "$m" \< "1000" ]; then
        echo "You do not have a lot of cpu or memory capacity available."
    elif  [ "$m" \> "1000"  -a  "$m" \< "2000" ]; then
        echo "You do not have a lot of cpu capacity available, but you do have a
n acceptable amount of memory."
    elif [ "$m" \> "2000" ]; then
        echo "You have less than 50% idle cpu capacity, but you do have a good a
mount of memory available."
    fi
elif [ "$cu" \> "50"  -a  "$cu" \< "80" ]; then
    if [ "$m" \< "1000" ]; then
        echo "You have a good amount of cpu capacity available, but keep an eye 
on the memory. "
    elif [ "$m" \< "2000"  -a  "$m" \> "1000" ]; then
        echo "You have a good amount of cpu and memory capacity available."
    elif [ "$m" \> "2000" ]; then
        echo "You have a good amount of cpu capacity and a good amount of memory
 available."
    fi
elif [ "$cu" \> "80" ]; then
    if [ "$m" \< "1000" ]; then
        echo "You have a lot of idle cpu capacity, but not a lot of memory"
    elif [ "$m" \< "2000"  -a  "$m" \> "1000" ]; then
        echo "You have a lot of idle cpu capacity, and an acceptable amount of f
ree memory."
    elif [ "$m" \> "2000" ]; then
        echo "You have loads of cpu and memory capacity available"
    fi
fi

 if ( "$cu" < "20" )

 "You do not have much cpu capacity available, keep an eye on your m
emory levels"