Explaination for command runner is unclear and doesn't seem to work

[lollingtonbear]

Description
Using filebrowser 2.27.0 on current arch linux.

I'm trying to use the command runner to reset the permissions on a file being uploaded. I've used the settings web page to add "chmod 777 $FILE" to the after_upload section. There is no log output, and adding echo $FILE in command runner (in after_upload) doesn't seem to do anything either. I've configured a log file and there is no output there.

Expected behaviour
command runner to output something somewhere so we can see what actually happened, if anything.

What is happening instead?
Nothing.

Additional context
The guide in the gitbook site is too vague.

How to reproduce?
As per description.

Files
N/A

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This issue was closed because it has been stalled for 5 days with no activity.