Re: Issue with remote async processes.

[Ergus <spacibba@aol.com>]

On Sun, Mar 27, 2022 at 09:22:53AM +0200, Michael Albinus wrote:
>Ergus <spacibba@aol.com> writes:
>
>Hi,
>
>> Sorry to bother... I have another question. When we use process-file and
>> start-file-process with tramp, how can we get the error output in a
>> buffer?
>
>The argument BUFFER can be a list. The car is the output (string or
>buffer), the cdr is the stderr (just a string, a filename).
>
>--8<---------------cut here---------------start------------->8---
>(let ((default-directory "/ssh::")
>      (output (generate-new-buffer "*Output*"))
>      (stderr "/ssh::/tmp/xxx"))
>  (process-file "echo" nil (list output stderr) nil "Hallo")
>  (process-file "echa" nil (list output stderr) nil "Holla")
>  (find-file stderr))
>--8<---------------cut here---------------end--------------->8---
>
>In start-file-process, it is similar. The difference is, that stderr can
>be either a string (filename) or a buffer.
>
>--8<---------------cut here---------------start------------->8---
>(let ((default-directory "/ssh::")
>      (output (generate-new-buffer "*Output*"))
>      (stderr (generate-new-buffer "*Stderr*")))
>  (start-file-process "test1" (list output stderr) "echo" "Hallo")
>  (start-file-process "test2" (list output stderr) "echa" "Holla"))
>--8<---------------cut here---------------end--------------->8---
>
>Best regards, Michael.
>
Very thanks Michael... This is useful.

What's reason process-file doesn't support to use a buffer for stderr?

Performance? Technical?