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From: chris@mimsy.UUCP (Chris Torek)
Newsgroups: comp.unix.wizards
Subject: Re: pseudo-tty problems
Message-ID: <6970@mimsy.UUCP>
Date: Mon, 8-Jun-87 21:51:30 EDT
Article-I.D.: mimsy.6970
Posted: Mon Jun  8 21:51:30 1987
Date-Received: Thu, 11-Jun-87 04:43:28 EDT
References: <7755@brl-adm.ARPA>
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 18

In article <7755@brl-adm.ARPA> eichelbe@nadc.arpa (J. Eichelberger) writes:
>... under 4.3 BSD UNIX ... using the telnet command to connect
>from my computer back into my computer.  When I do this and am
>logged on the pseudo-tty port, I lose characters on output. ...
>Do pseudo-ttys not understand a control-S sent out by the terminal?

Telnet sends the control-S right down the connection to the remote
machine.  It has to get all the way through the server and down into
the pty before it can be interpreted as a `stop'.  In the meantime,
other output has flooded your VT100's input buffer.  The sending
stops, but too late.

Rlogin attempts to perform XON/XOFF protocol locally so as to avoid
this.  It does not do a perfect job, but it works much better than
telnet.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7690)
Domain:	chris@mimsy.umd.edu	Path:	seismo!mimsy!chris