GNU bug report logs - #46258
openat, chownat, ... in Guile?

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Maxime Devos <maximedevos <at> telenet.be>
To: bug-guile <at> gnu.org
Subject: openat, chownat, ... in Guile?
Date: Tue, 02 Feb 2021 15:45:31 +0100

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Hi guilers,

I would like to see fchownat, openat, fchmodat
and any *at variants I forgot to appear in future versions
of Guile in some form.  I have two proposals, which I will
illustrate with the procedure 'chmod':

* chmod can currently modify permissions of a file.
  This OBJECT argument identifying the file can currently
  be a filename or a port.  Allow a ‘file in a directory’
  object as well.  This could be created with a procedure

  (make-path-at DIRECTORY-PORT FILENAME)

  This procedure does not perform any I/O, but rather
  constructs what is effectively is a pair (DIRECTORY-PORT
  . FILENAME) but with its own type.

* Follow the C API, but with Scheme types.

  (chmodat DIRECTORY-PORT FILENAME MODE FLAGS)

  where FLAGS can include AT_SYMLINK_NOFOLLOW (from chmod(2)
  Linux man page)

Any thoughts?

Greetings,
Maxime

P.S. I'm not subscribed to bug-guile <at> gnu.org, please CC me.

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Message #8 received at 46258 <at> debbugs.gnu.org (full text, mbox):

From: Maxime Devos <maximedevos <at> telenet.be>
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: guix-devel <at> gnu.org
Subject: Re: Potential security weakness in Guix services
Date: Fri, 05 Feb 2021 15:16:39 +0100

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On Fri, 2021-02-05 at 13:20 +0100, Maxime Devos wrote:
> On Fri, 2021-02-05 at 10:57 +0100, Ludovic Courtès wrote:
> > [...]
> [...]
> 
> I'll try to implement this API in Scheme (using the FFI), and post
> it at https://notabug.org/mdevos/things.  I'll post a follow-up
> messsage once I've implemented the basics (openat, chmodat,
> chownat).

Ping!
https://notabug.org/mdevos/things/src/a0715e6758ad43252e16993dcf688a25156057f3/fs-at.scm

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Message #11 received at 46258 <at> debbugs.gnu.org (full text, mbox):

From: Maxime Devos <maximedevos <at> telenet.be>
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: 46258 <at> debbugs.gnu.org, 54485 <at> debbugs.gnu.org
Subject: Re: bug#54485: [PATCH] gnu: Add guile-with-openat.
Date: Thu, 24 Mar 2022 12:55:41 +0100

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Ludovic Courtès schreef op do 24-03-2022 om 12:37 [+0100]:
> Instead, I would prefer to actually review and apply the patches
> upstream.  I’ve been meaning to do that, really, but it requires a chunk
> of time and focus, which keeps leading me to postpone.

OK. I can relate, w.r.t. the IPFS substitution patches.

> Is the latest patch set on guile-devel?  It’s not mentioned at
> <https://issues.guix.gnu.org/46258>.

It's at <https://lists.gnu.org/archive/html/guile-devel/2021-11/msg00005.html>.

Greetings,
Maxime.

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