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From: mcvoy@uwvax.UUCP
Newsgroups: comp.unix.questions,comp.unix.wizards,comp.lang.c
Subject: Re: Filtering Everything
Message-ID: <3448@rsch.WISC.EDU>
Date: Mon, 13-Apr-87 12:29:18 EST
Article-I.D.: rsch.3448
Posted: Mon Apr 13 12:29:18 1987
Date-Received: Wed, 15-Apr-87 02:19:55 EST
References: <919@watmum.UUCP> <6447@bu-cs.BU.EDU> <3446@rsch.WISC.EDU> <16583@sun.uucp>
Reply-To: mcvoy@rsch.WISC.EDU (Larry McVoy)
Distribution: comp
Organization: U of Wisconsin CS Dept
Lines: 17
Xref: utgpu comp.unix.questions:1704 comp.unix.wizards:1766 comp.lang.c:1593

I wrote:
   BTW - SysV.3 *has* pttys - they're called sxt's (I think).  Someone
   will jump on this if I'm wrong....

Guy wrote:
   You bet.  System V has "sxt"s, but they are *not* pseudo-ttys.  They are just
   switches that get stuck in front of regular ttys.  To quote from a

I was wondering about this... I've never used sxt's (pc7300 doesn't run 5.3)
so I don't know what the diffference is.   Can't you use them just like
ptty's?  If I wanted to write an application that preprocesses tty input
but is transparent to applications underneath it, can I do that?  I.e., 
a history filter for sh (for those w/o [c|k]sh)...
-- 
Larry McVoy 	        mcvoy@rsch.wisc.edu  or  uwvax!mcvoy

"It's a joke, son! I say, I say, a Joke!!"  --Foghorn Leghorn