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Hanak David <dhanak@inf.bme.hu> writes:

> Correct me if I'm wrong, but Gnus doesn't extract attachments
> automatically, does it?  

It _can_ do that (depending on you settings), but in that case it
doesn't use the filename parameter.

> And when you do extract an attachment inentionally, Gnus *always*
> offers you the filename for editing.  I guess we can call that
> "explicitly initiating the action".  And beyond that, I don't really
> see why Gnus should *prevent* anything.

The question isn't really whether Gnus should change certain
`filename' parameters.  It already does this (the directory part of
the parameter is always stripped), and rightly so.

It's more a question of how _much_ defensive programming we should do.

Lots and lots of flawed shell scripts don't handle embedded newlines
correctly, so I think it makes sense to acknowledge that fact --
especially because there's very little legitimate use for file names
with control characters.

> Perhaps an additional confirm request for certain filenames would do
> no harm, but if you do that, also create a variable
> 'gnus-article-confirm-save-to-suspicious-files-p', because I, for
> one, don't want Gnus to be asking that question.

With the approach I suggest you can just remove the unwanted functions
from `mm-file-name-rewrite-functions'.