bug#48902: 28.0.50; Directory names containing apostrophes and backticks cause problems

[Eli Zaretskii]

> From: Mattias Engdegård <mattiase@acm.org>
> Date: Tue, 8 Jun 2021 19:45:22 +0200
> Cc: 48902@debbugs.gnu.org, Alan Third <alan@idiocy.org>,
>  Rudolf Adamkovič <salutis@me.com>, naofumi@yasufuku.dev
> 
> The quick fix of reverting to stringWithUTF8String: will work, but the real 
> problem is that we have no control of the encodedness of lisp strings being 
> passed around.

The usual technique in these cases is to keep Lisp strings unencoded,
encode them when passing to the low-level C functions, and pass to
those functions only the pointer to the string's data.

In those rare cases when you really need to pass a Lisp string that is
an encoded file name, call the argument "encoded_file" or somesuch.
But these cases should be rare exceptions.