// main file
#!/bin/bash

        function main {
                while true; do
                        read -p "prompt" string
                        filter
                done
        }

        function filter {
                echo $string # this outputs correct
                /home/test/modules/m1 process "$string"
                return 0
        }

        main
        exit
// m1
#!/bin/bash
        #process wont be the only function in this file
        function process {
                echo $1 #doesn't output what i want
                return 0
        }
        echo $2 #doesn't output what i want
        $1 "$2"