From: David Ljung 
Subject: How can I attach a tty to a socket file descriptor?
Date: 28 Oct 92 19:09:47 GMT
To:       unix-wizards@sem.brl.mil


Well, nobody answered this on comp.unix.questions,
so maybe I need to ask people a little higher up  ;-)

Okay - here's my question:

I need to hook up a tty (real or fake) to a file descriptor
returned from an accept call for sockets on HP-UX.

I need to do this so I can run a shell from the accept
which can then run vi.  I can't currently run vi, because
I need to set the term to non canonical mode with no echo.
(or is it canonical mode -- which ever mode doesn't wait for \n)
Since I don't have a tty, I can't do this.  I have looked
through man pages, tried the dup2 command, read books, tried
ptty 4.0, attempted sifting through the source for
tcsh, and even asked my mom; in my attempt to find an answer...

Hopefully there is a simple one - the code I use now to run
programs from my limited non-tty shell is the following:

  close(0);
  close(1);
  close(2);
  dup2(ns,0);
  dup2(ns,1);
  dup2(ns,2);
  execvp(command[0],command);

Where ns is the fd returned from accept:
  accept(s,&addr,&addrlen);

Hoping for an easy fix.... (but any fix will do  ;-)

Dave


 ------------------------------------------------------------------  (__)  ----
David Ljung                   314 N. Broom St. #3A                  oo )
Spawning Cow! Productions     Madison, WI. 53703               moo. |_/\
                              (608) 257-COWS                ljung@cae.wisc.edu
"The reasonable man adapts himself to the world,
 the unreasonable one persists in trying to adapt the world to himself.
 Therefore, all progress depends upon the unreasonable man."
		-George Bernard Shaw