Unix Tip: BE ALARMED

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3208 - November 18, 2009

http://www.ugu.com/sui/ugu/show?tip.today

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BE ALARMED

Name the following script alarm. Make it executable and them invoke it as:

% alarm 10 "Time for tea"

After 10 seconds machine will echo Time for Tea and beep five times.....

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#! /usr/bin/ksh
# alarm program
# displays a message at
if [ $# -ne 2 ]
then
echo "USAGE : $0 seconds message"
exit 1
fi

time=$1
mesg=$2
signal_alarm()
{
sleep $time
banner $mesg
for i in 1 2 3 4 5 6 7 8 9
do
if [ $i -eq 2 -o $i -eq 4 -o $i -eq 6 -o $i -eq 8 ]
then
sleep 1
else
tput bel
fi
done
}

case $1 in

[0-9][0-9][0-9] | [0-9] | [0-9][0-9] )signal_alarm &;;
*)echo Seconds range is from 0 to 199;;

esac

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