Write a shell script to implement ‘ls’ command?

a = $#

if [ $# - = 0 ]

then

ls – r

fi

if [ $1 = “l” ]

then

ls – l

fi

if [ $1 =  “ –I “ ]

then

ls – i

fi

if [ $# - eq 2 ]

then

if [ $1 = “-l” –a $2 = “-r” – o $1 = “-r” –a $2 = “-l” ]

then

ls – ls

fi

if [ $1 = “-r” –a  $2 = “-i” – 0 $1 = “-i” –a  $2 = “-r” ]

then

ls – ri

fi

if [ $1 = “-l” – a $2 = “-i” – 0 $1 = “-i” –a $2 = “-l” ]

then

ls – li

fi

fi

OUTPUT:

Sh $h les .sh – i 310952 fname

310951 changes dir.sh 310734 gr 100 .sh 319749 dir

$sh les .sh – r

word .sh sq .sh mul table .sh

gr 100 .sh file while loop .sh