Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!GYRE.UMD.EDU!chris
From: chris@GYRE.UMD.EDU (Chris Torek)
Newsgroups: comp.protocols.tcp-ip
Subject: Re:  TELNET Buffering Woes
Message-ID: <8905040620.AA01520@gyre.umd.edu>
Date: 4 May 89 06:20:10 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 17

What Chuck Hedrick described (flush when the OS sees a flushing
character) is what rlogin does now (and has done since 4.2, although
it was buggy then) in BSD.  It does work and does not cause trouble
for Emacs users, nor for those who like the Rand editor, or run
various modem protocols over the network login.  But it is not
as efficient as it might be.

One should be able, with a (relative) minimum of hassle, to emulate
the terminal driver state at the far end of a network link.  This
has been possible in other systems, but not in BSD, because the
PTY driver refuses to cooperate by telling user processes about
state changes.  This is not too hard to fix, and one of these days
it will be fixed.  (As of now it is possible to see state changes,
but only by asking continually---not the nicest thing to do on a
multiprocessing system.)

Chris