GNU bug report logs - #21605
24.3; Eshell not using stderr

Previous Next

Full log

Message #11 received at 21605 <at> debbugs.gnu.org (full text, mbox):

From: Jim Porter <jporterbugs <at> gmail.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>, Nikolas De Giorgis <bznein <at> gmail.com>
Cc: 21605 <at> debbugs.gnu.org
Subject: Re: bug#21605: 24.3; Eshell not using stderr
Date: Thu, 12 May 2022 19:14:46 -0700

On 5/12/2022 5:26 AM, Lars Ingebrigtsen wrote:
> This seems to be the case in Emacs 29, too, but I'm not sure whether
> this is by design or not.  I've added Jim to the CCs; perhaps he has
> some input here.

I think this is just a missing feature, partly due to the fact that the 
redirection operators don't let you redirect a specific fd. That's in 
the "Bugs and Ideas" section of the Eshell manual though:

  Support ‘2>&1’ and ‘>&’ and ‘2>’ and ‘|&’

    The syntax table for parsing these should be customizable, such that
    the user could change it to use rc syntax: ‘>[2=1]’.

Doing that is probably the hardest part. The other bit that would need 
to be fixed is (I think) to modify `eshell-gather-process-output' to use 
`make-process' instead of `start-file-process', and then give it a 
:stderr argument so that Emacs doesn't write both stdout and stderr to a 
single temp buffer.

I agree that this would definitely be nice to have though.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.