GNU bug report logs - #19701
24.3; directory-files platform-dependent behaviour when directory doesn't exist

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#19701: closed (24.3; directory-files platform-dependent
 behaviour when directory doesn't exist)
Date: Tue, 27 Jan 2015 19:08:02 +0000

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Your message dated Tue, 27 Jan 2015 21:07:00 +0200
with message-id <8361bsoxez.fsf <at> gnu.org>
and subject line Re: bug#19701: 24.3; directory-files platform-dependent behaviour when directory doesn't	exist
has caused the debbugs.gnu.org bug report #19701,
regarding 24.3; directory-files platform-dependent behaviour when directory doesn't exist
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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From: VIDA Gábor <vidagabor <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3;
 directory-files platform-dependent behaviour when directory doesn't
 exist
Date: Tue, 27 Jan 2015 13:55:35 +0100

Hi!

On Linux when I specify a non-existing directory to directory-files, it signals an
error:

  (directory-files "abcd")
  eval: Opening directory: no such file or directory, /home/evidgbo/tmp/abcd

But on Windows, it returns nil:

  (directory-files "abcd")
  => nil

I think they should work tha same way regardless of the underlying system, and it
ends up in a Gnus error, what I will report separately once I understand that problem
better.

I used the official Windows version:

  GNU EMacs 24.3.1 (i386-mingw-nt6.1.7601) of 2013-03-17 on MARVIN

--
Thanks and regards,
Gábor Vida

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[Message part 3 (message/rfc822, inline)]

From: Eli Zaretskii <eliz <at> gnu.org>
To: VIDA Gábor <vidagabor <at> gmail.com>
Cc: 19701-done <at> debbugs.gnu.org
Subject: Re: bug#19701: 24.3;
 directory-files platform-dependent behaviour when directory
 doesn't	exist
Date: Tue, 27 Jan 2015 21:07:00 +0200

> From: VIDA Gábor <vidagabor <at> gmail.com>
> Date: Tue, 27 Jan 2015 13:55:35 +0100
> 
> On Linux when I specify a non-existing directory to directory-files, it signals an
> error:
> 
>   (directory-files "abcd")
>   eval: Opening directory: no such file or directory, /home/evidgbo/tmp/abcd
> 
> But on Windows, it returns nil:
> 
>   (directory-files "abcd")
>   => nil

That is correct.

> I think they should work tha same way regardless of the underlying
> system, and it ends up in a Gnus error, what I will report
> separately once I understand that problem better.

The Windows implementation of directory-files always worked like that;
I looked as far back as Emacs 21.4.  (Technically, this happened
because the Windows implementation of 'opendir' doesn't actually open
the directory, so it doesn't know.)

This was never a problem, though.  What exactly does Gnus do that this
subtlety gets in the way?

In any case, I fixed this in commit 9664def on the emacs-24 branch.

Thanks.

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