openssh PTY allocation

Gert Doering gert at
Fri Jul 29 02:00:38 EST 2011


On Thu, Jul 28, 2011 at 11:52:47AM -0400, Morty Abzug wrote:
> On Wed, Jul 27, 2011 at 05:25:05PM +1000, Damien Miller wrote:
> > The problem is a bug in ScreenOS, it refuses pty-req channel requests
> > when the tty modes blob exceeds 256 bytes in length. If you want a
> > workaround that preserves the usability of the tty, then comment out
> > a couple of less-important modes in ttymodes.h and recompile
> Any suggestions on which modes are less important?

In that context, I think CS7, PARENB, PARODDB, IXON, IXOFF, IXANY, IUCLC,
PARMRK would be the ones I'd skip, given that use of 7-bit and parity
terminals is unlikely, and that the netscreens are not going to honour
xon/xoff flow control (IXON/IXOFF/IXANY) anyway.

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Gert Doering - Munich, Germany                             gert at
fax: +49-89-35655025                        gert at

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