Nmap Development: Re: zenmap as root error

[Fyodor <fyodor () insecure org>]

On Tue, Apr 01, 2008 at 10:29:14PM -0300, João Medeiros wrote:
> You can just check if the DISPLAY environment variable is set. Like this:
>
> ----------------------------------------8<----------------------------------------
> import os
> import sys
>
> if 'DISPLAY' not in os.environ.keys():
>
>     print "Unable to start graphical application. Please, set DISPLAY \
> environment variable."
>     sys.exit(0)
Thanks, but have you tested this?  One problem is that I'm guessing it
would break Zenmap on Windows.  It might cause trouble on other
platforms too.  I think we need someone who can reproduce the
segmentation fault issue to find a more direct way to solve the
problem.  It is OK for Nmap to quit in this case, we just need a
better error than segmentation fault.  On my systems, I do get a
better error message (exception) from Zenmap.  For example, what if
DISPLAY is set but it is wrong?  Then someone might get a segmentation
fault despite this $DISPLAY check.

Cheers,
-F


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