Re: Redirecting standard output

["Jan Djärv" <jan.h.d@swipnet.se>]

Eli Zaretskii skrev 2011-04-23 22.10:
>> From: Lars Magne Ingebrigtsen<larsi@gnus.org>
>> Date: Sat, 23 Apr 2011 20:46:36 +0200
>>
>>>> Or are there gotchas when using select in Emacs?
>>>
>>> wait_reading_process_output already uses select, so adding another one
>>> is probably not a good idea.
>>
>> Would `select'-ing on two separate collections of sockets cause any
>> problems?
>
> I don't know.  I never tried, and I don't know enough about the
> implementation of `select'.  But I envision difficulties in
> multiplexing between the two `select' calls, if, e.g., there's an
> async subprocess running (like a speller in some text buffer) and you
> invoke a program via call-process.

Since call-process normally doesn't return until the process is finished, that 
will not differ from what we have now.

As for selecting in two places, this is already done, for example when you 
open a new network socket, when a menu is opened on X, and when waiting for 
resize events on X.  You just put in the pipe end of stdin and stderr into the 
select and loop on that.

	Jan D.