Remeber when I ranted about RH 6.0...

[Christoph Doerbeck A242369]

Derek Martin wrote:
> On Thu, 29 Jul 1999, Christoph Doerbeck A242369 wrote:
> 
> > 
> > If someone can answer this:  xterm on SUN is not setuid, what changes
> > the permissions on /devices/pseudo/* when xterm opens a new pseudo device?
> > 
> > - Christoph
> 
> This one I'm not so sure of, but I think it's the tty driver in the
> kernel.  With Unix98 pty's, when one wants to assign a pseudo tty, one
> would open /dev/ptmx and I believe the tty driver sets up a pty with the
> appropriate ownership and permissions.
> 


Gordon & and I have spent the last 15 minutes conferencing, truss'ing and
reading a plethora of man pages.

	xterm calls grantpt() which execve("/usr/lib/pt_chmod" ... )

If you look, /usr/lib/pt_chmod is setuid.  Mystery solved!!!

The key to unlock this whole mess was to run

	truss -f xterm > /tmp/xterm.out 2>&1

and then vi /tmp/xterm.out and sift through the rubble...

- Christoph


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