Shell Programming and Scripting

login()
{	
	while :
	do
	if [[ `who | grep -c $name` -gt 0 ]]
	then
	echo "\a user $name is logged in"
	echo "User $name has logged in. `date`  >> logs.txt"
        sleep $freq
	else
	echo "User $name is not logged in"
	sleep $freq
	fi
	done
}

loginQ()
{
	while :
	do
	if [[ `who | grep -c $userName` -gt 0 ]]
	then
	echo "User $name has logged in. `date`  >> logs.txt"
        sleep $freq
	else
	sleep $freq
	fi
	done
}
	


if [ $# -le 3 -a $# -ge 1 ] 
then
name=$1
freq=$2
quit=$3

else

echo Invalid number of arguments
fi

if [ -z $frequency ]
then
frequency=60
fi

if [ $quit = q ]
then

loginQ()

else

login()

fi