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Bash Scripting: Sanitize filenames

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Lord.DragonFly.of.Dawn
Advanced Member

Joined: 18 Jul 2024
Posts: 607
Location: South Portland, Maine, USA, Earth, Sol System

Posted: Wed Jan 14, 2024 3:52 pm Post subject: Bash Scripting: Sanitize filenames

It's a problem for every Bash programmer out there. you go out and write this awesome script that would work great, except that it fails because your automagically generated filenames are not properly sanitized.

Through much experimentation I have creaded several sed commands that can be used to sanitize filenames based on the alowable set of characters.

Set: A-Za-z0-9.
delete:

Code:

sed -e s/[^A-Za-z0-9.]//g

or replace:

Code:

sed -e s/[^A-Za-z0-9.]/_/g

Set: A-Za-z0-9.[]{}()-_
delete:

Code:

sed -e s/[^\]\[A-Za-z0-9._{}\(\)\-]//g

or replace:

Code:

sed -e s/[^\]\[A-Za-z0-9._{}\(\)\-]/_/g

Set: A-Za-z0-9~.,_[]{}()'-+
delete:

Code:

sed -e s/[^\]\[A-Za-z0-9~.,_{}\(\)\'\-\+]//g

or replace:

Code:

sed -e s/[^\]\[A-Za-z0-9~.,_{}\(\)\'\-\+]/_/g

All three of these example sets work well, although I suggest using the most restrictive set possible for your problem set for maximum portability.

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