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bug#21605: 24.3; Eshell not using stderr
From: |
Jim Porter |
Subject: |
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.