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bug#24287: Process filters received stderr output, not documented
From: |
Eli Zaretskii |
Subject: |
bug#24287: Process filters received stderr output, not documented |
Date: |
Mon, 22 Aug 2016 21:23:08 +0300 |
> From: "Paul A. Steckler" <steck@stecksoft.com>
> Date: Mon, 22 Aug 2016 13:35:25 -0400
>
> The documentation for Process Filter Functions mentions that process
> filters receive the standard output from their associated processes. It
> does not mention that the filters also receive standard error output.
That is described in the parent section:
It is impossible to separate the standard output and standard error
streams of the subprocess, because Emacs normally spawns the subprocess
inside a pseudo-TTY, and a pseudo-TTY has only one output channel. If
you want to keep the output to those streams separate, you should
redirect one of them to a file—for example, by using an appropriate
shell command.