Path: utzoo!attcan!uunet!mcsun!ukc!axion!vision!ahall
From: ahall@vision.UUCP (Andy Hall)
Newsgroups: comp.unix.aix
Subject: Pseudo-ttys and hft's
Message-ID: <1139@vision.UUCP>
Date: 9 Jul 90 15:53:44 GMT
Reply-To: ahall@vision.UUCP (Andy Hall)
Organization: VisionWare Ltd., Leeds, UK
Lines: 35

Hi,

 	I have a 6150 running AIX 2.2.1.
	I have written a program which uses pseudo ttys  to interface to a net
much the same as telnet does. I sit on the master side of the pty and regular
applications, i.e. sh vi etc., sit on the other. 


                     sh

                   --------
                  |  pts   |
                  | ------ |  pseudo-tty
                  |  ptc   |
                   --------

                    my prog

                       |
                       |
                       |
                   the wire

My problem is: when I start up
vi or pg or the like, someone writes  " ESC [ x ......." on the data stream.
	I have discovered that this is a hft ( High Function Terminal ) ioctl
call which gets thrown on the data stream if the device is a pseudo tty. But how
did it get there, (did vi write it ?), and how do I stop it.  Do I have to 
inspect the whole data stream and strip out hft calls?

	Help.

Replies via email please:

ahall@vision.uucp