sshd stty login

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From: Bela Lubkin <belal@caldera.com>
Subject: Re: Query re stty settings on physical TTY's
Date: Sat, 4 May 2002 12:47:05 GMT
References: <aaqh97$8d4$1@perki.connect.com.au> <20020502125947.R10046@mammoth.ca.caldera.com> <aasouu$n07$1@perki.connect.com.au> 

Stuart J. Browne wrote:

> "Bela Lubkin" <belal@caldera.com> wrote in message
> news:20020502125947.R10046@mammoth.ca.caldera.com...
> > Stuart J. Browne wrote:
> >
> > > I've got an 'annoyance' with the way the STTY settings are remembered
> > > between sessions (on a modem, attached to /dev/tty1A), even after the line
> > > has been dropped.

> > > ... Unfortunately, the 'rows 74 cols 132' doesn't un-set it's self

> > This was a bug with some releases of OpenServer and fixed in others.
> > However, my crystal ball and my Quantum Uncertainty Device are coming up
> > cloudy with regard to this behavior on No Specific Release of No
> > Specific Operating System.
> 
> *cringe* I can't beleive I did that.  Confirmed behaviour under
> OSR5.0.[456].
> 
> All with latest RS applied.

Well, John points out that this _is_ a bug with current releases... it
was fixed for the pty driver in rs506a (maybe 5.0.6), but not
generically.  The code that resets those values should be in the generic
tty driver, not in each hardware driver.

For the moment, the workaround
of putting `stty rows 0 columns 0` in /etc/profile & /etc/cshrc may
suffice.  Or may not -- I suspect that will have a negative effect on
network protocols such as telnet, which pass screen dimensions.  You
would need to figure out how to zero the settings only for non-network
logins.  Something like:

  case `tty` in
     /dev/ttyp[0-9]*) :;; # pty driver gets it right; don't override telnetd
         "not a tty") :;; # avoid stty error message if not a tty
                   *) stty rows 0 columns 0;;
  esac
     

>Bela<
 

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