Shell Script To Create Files and Directories That Do Not Exist

#!/bin/bash
# Shell script to create files and directories that do not exist
# This script also demonstrate use of functions and command line arguments using getopts command
# -------------------------------------------------------------------------
# Copyright (c) 2004 nixCraft project <http://www.cyberciti.biz/fb/>
# This script is licensed under GNU GPL version 2.0 or above
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# ----------------------------------------------------------------------
usage(){
	echo "Usage: $0 {-f filename} {-d dirname}"
	exit 1
}
 
createDir(){
	if [ ! -d $1 ]
	then
		/bin/mkdir -p $1 >/dev/null 2>&1 && echo "Directory $1 created." ||  echo "Error: Failed to create $1 directory."
	else
		echo "Error: $1 directory exits!"
	fi
}
 
createFile(){
	if [ ! -f $1 ] 
	then
		touch $1 > /dev/null 2>&1 && echo "File $1 created."  ||  echo "Error: Failed to create $1 files."
	else
		echo "Error: $1 file exists!"
	fi
}
 
while getopts f:d:v option
do
        case "${option}"
        in
                f) createFile ${OPTARG};;
                d) createDir ${OPTARG};;
                \?) usage
                    exit 1;;
        esac
done