Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!stan!imp
From: imp@solbourne.com (Warner Losh)
Newsgroups: comp.protocols.tcp-ip
Subject: Re:  Escape sequences over Telnet/TCP
Message-ID: <1991May4.213437.15720@solbourne.com>
Date: 4 May 91 21:34:37 GMT
References: <9105040208.AA21383@WLV.IMSD.CONTEL.COM>
Organization: Solbourne Computer, Inc., Longmont, CO
Lines: 18

In article <9105040208.AA21383@WLV.IMSD.CONTEL.COM>
mcc@WLV.IMSD.CONTEL.COM (Merton Campbell Crockett) writes:
>IAS, RSX, RSTS/E, TSX, VMS, etc.  Standard handling of an
><ESC> by the terminal driver is to terminate the current read when
>received.

I don't recall the other operating systems well enough to comment, but
this IS *NOT* the case under VMS.  The terminal driver "knows" about
VT100 escape sequences so it can do command line editing.  Since these
escape sequences start with ESC, the terminal driver CAN'T abort the
read.  Now if it gets <ESC><ESC>, then it will abort the read with a
bad escape sequence.  (Or maybe this is an RMS level function, it has
been a while....)

Warner
-- 
Warner Losh		imp@Solbourne.COM
God is an Iron