Bash Cookbook

Including/importing a library script and using external functions

To prepare for this example, create the following two files and open both:

• io_maker.sh
• library.sh

Inside library.sh, add the following:

#!/bin/bashfunction create_file() {    local FNAME=$1    touch "${FNAME}"    ls "${FNAME}" # If output doesn't return a value - file is missing}function delete_file() {    local FNAME=$1    rm "${FNAME}"    ls "${FNAME}" # If output doesn't return a value - file is missing}

Inside io_maker.sh, add the following:

#!/bin/bashsource library.sh # You may need to include the path as it is relativeFNAME="my_test_file.txt"create_file "${FNAME}"delete_file "${FNAME}"exit 0

When you run the script, you should get the same output:

$ bash io_maker.shmy_test_file.txt ...