while getopts tcx: tmp
do
case $tmp in
t) TFLAG=true
words=`ls -l | grep '...x..x..x' | awk '{print $10}' | grep .txt$`
if [ -n "$words" ]
then
echo $words
else
echo "No such file exists"
fi
;;
c) CFLAG=true
words=`ls -l | grep '...x..x..x' | awk '{print $10}' | grep .c$`
if [ -n "$words" ]
then
echo $words
else
echo "No such file exists"
fi
;;
x) XFLAG=true
words=`ls -l | grep '...x..x..x' | awk '{print $10}' | grep "$OPTARG"`
if [ -n "$words" ]
then
echo $words
else
echo "No such file exists"
fi
;;
esac
done