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Re: display-time, mail-icon and POP3 mailboxes

From: Kim F. Storm
Subject: Re: display-time, mail-icon and POP3 mailboxes
Date: 12 Feb 2002 00:31:08 +0100
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2.50

Richard Stallman <address@hidden> writes:

>     >    > With the pop3 sample code I posted some time ago, there is one 
> serious
>     >    > problem: If emacs cannot connect to the pop3 server, it may hang 
> (no
>     >    > user interaction) until the connect times out.  That is not
>     >    > satisfactory!
>     > 
>     > The same applies to pop3.el from Gnus.
>     If we want to support this in general, we must implement an async
>     version of open-network-stream (or add an optional arg to it to make
>     it async - that arg could be a function which is called when the
>     connection has been opened.
> Is it hanging in open-network-stream?  If so,
> precisely where in open-network-stream is it waiting?
> It may be a straightforward matter to implement quitting from
> a few places where the waiting typically happens.
> That would fix this problem.

I haven't debugged this specifically with emacs, but in other
programs, it has been necessary to make connect non-blocking with
fcntl(s,F_SETFL,O_NONBLOCK) and then use the writefds of select to
know when the connect has completed (at least on GNU/Linux).

Kim F. Storm <address@hidden> http://www.cua.dk

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