You've written a script that processes a list of files. You want to ensure that even if a filename contains spaces, it's treated as a single argument. Which built-in variable should you modify?

To ensure that filenames with spaces are treated as single arguments in a script, you should modify the OIFS (Original Internal Field Separator) variable. This allows you to temporarily change the IFS value to a specific character (e.g., newline) and then restore it to its original value after processing the filenames. This ensures that spaces don't break the filenames into multiple arguments.