f1() {
echo $1 $2 $3 "line" $4

case $# in
        0)      echo -e "# comment1\n# comment2" > list_file
                read -p "Please fill in this list_file: "

                echo $REPLY
                ;;
        1)     if [ ! -f "$1" ]
               then  > $1 && echo -e "# comment1\n# comment1" > $1
                        read -p "Please fill in "$1": "

                        echo $REPLY
               else
                        if [ -f "$1" -a $(grep -v '^#' "$1" | wc -l ) -ne 0 | $(g1 $arg1 $arg2 $arg3) -ne 0 ] # line 58
                        then
                                grep -v '^#' "$1" |
                                                while read arg1 arg2 arg3
                                                do f1 $arg1 $arg2 $arg3
                                                done
                         else
                                        echo "Errors found in date/time - exiting now" >&2
                                        exit 1
                          fi
                                read -p "Please fill in "$1": "
                                echo $REPLY
                fi
               ;;

        3)      echo -e "# Fill in the 3 variables below\n# DATE HOUR MN" > $1
                echo $2 $3 $4 >> "$1"                  # concatenation of variables in $ 1
                                grep -v '^#' "$1" | # Omits the comments
                                while read arg1 arg2 arg3 # Parse the parameters
                                do f1 $arg1 $arg2 $arg3 # Processing parameters for the function f1
                                done
                ;;
 *)      echo "error msg"; exit
esac