Subject: Re: xon/xoff, dtr/dsr, cts/rts... help!
To: Johnny Billquist <bqt@update.uu.se>
From: Peter Seebach <seebs@plethora.net>
List: current-users
Date: 11/01/2002 10:06:15
In message <Pine.LNX.4.21.0211011646140.13900-100000@Tempo.Update.UU.SE>, Johnn
y Billquist writes:
>It's a problem, because at the same time, you want to have this as close
>to the terminal as possible, since you have a short time between sending
>the xoff until it is reacted upon, during which you will get additional
>characters. Because of this, terminals using software flow control must be
>able to handle a few more characters coming in after the xoff have been
>sent. On "modern" terminals you can select at which point the xoff is
>sent, so that you better can handle slow reaction to the xoff.

Ah-hah!

>If possible, set the limit before sending xoff as low as possible. Run
>through screen, or some other middleware, which buffers, and retain the
>software flow control on the local side (if screen does this?). Or use
>something other than ssh. I think rlogin allows xon/xoff to be processed
>locally, and the rest passes over (or if it was telnet).

I think screen is smart enough - but you have also just explained the
setting in my terminal's setup menu, which can be set to 64, 128, or 192,
and has to do with flow control.  :)

-s