test.sh

#!/bin/bash

CMD_LINE_USAGE="Usage: $0 [-h] [-f file] [-r report]"
NUM_ARGS=1
function show_help() {
  echo "${CMD_LINE_USAGE}"
  echo "Options are:"
  echo "    -h    for help"
  echo "    -f    specify a file"
  echo "    -r    generate report"
}

function parse_file() {
    filename=$1
    if [[ -e "$filename" ]]; then
    	echo "${filename}" | awk -F"." '{print $1}' | awk -F"_" '{print $NF}'
        exit 1
    fi 
}

function parse_assignment_file() {
    filename=$(parse_file)
    echo "Enter a file name: "
    read filename 
if [ -z "filename" ] then
        exit
fi

    terminal=`tty`

    exec < $filename
    count=1
    while read line ; do
        echo $count.$line
        count=`expr $count + 1`
    done

exec < $terminal

}

while getopts "hl:f:c" opt; do
  case "$opt" in
    h) show_help
      exit 0
      ;;
    c) parse_assignment_file=$(parse_assignment_file ${OPTARG})
      ;;
    f) parsed_file=$(parse_file ${OPTARG})
      ;;
    l) just_loop
      ;;
  esac
done



echo ${parsed_file}
exit 0