Shell Script: : remove files and directories

#!/bin/bash
#########################################################
# File Name : sy_2_g
# Author: : Suresh Yadagiri
# Date : August 10,2010
# Descriptiom :
# write a Bourne shell script that takes a file name and
# a directory name as command line arguments and removes
# the file if it is found under the given directory and
# is a simple file. If the file(the first argument) is a
# directory, it is removed (including all the files and
# subdirectories under it).
#
#########################################################
function printusage(){
echo -e "\nusage:\n$0 filename directoryname"
echo " or "
echo -e "$0 directoryname directoryname"
exit 1
}
if (( $# < 2 || $# > 2 ))
then
echo "Invalid arguments"
printusage
fi

if [ ! -d $2 ] ; then
echo " $2 is not a directory or exists"
printusage
fi

if [ ! -d "$2/$1" ] && [ ! -f "$2/$1" ]
then
echo "\"$1\" is not a directory or a file inside \"$2\"."
printusage
fi

if [ -d "$2/$1" ] ; then
echo "\"$1\" directory removed from $2"
rm -r "$2/$1"
else
echo "\"$1\" file removed from $2"
rm -f "$2/$1"
fi