Re: [gentoo-catalyst] Sudo Issues

[Andrew Gaffney]

Kessler, Paul wrote:
> I seem to be having two issues with sudo in it’s default setup under
> catalyst. I’m not quite sure if this is a configuration problem or a
> known issue. If I start up terminal and from the command line type sudo
> su – I get the following message:
>
>
> Fatal server error.
>
> Server is already active for display 0
>
> If this server is no longer running, remove /tmp/.X0-lock and start again
>
>
> After a few seconds it drops me to the proper command prompt, after that
> if I drop back to the regular user shell and try it again then there is
> no error and it works fine.

No idea about this one.

> The second is if I try to launch any graphical application from a
> command line such as ethereal I get the following error:
>
>
> Gtk-WARNING **: cannot open display:
>
>
> But if I simply su to root and execute ethereal it works perfectly. I
> have searched several forums on this one, and most of the posts just say
> “well some programs don’t run right as root”. Ethereal on the other hand
> requires special permissions to handle the network interfaces and should
> be run with sudo, so I doubt that is the problem.

This one I'm familiar with. The current default configuration of sudo purposely 
wipes out the existing environment before switching to root. You can disable 
this behavior by commenting out the "Defaults	env_reset" line in /etc/sudoers. 
The following command in your fsscript should take care of that:

sed -e 's:^\(Defaults.\+env_reset\)$:# The following line is completely fscking 
stupid\n# \1:' /etc/sudoers

Alternatively, 'export DISPLAY=:0.0' after sudo'ing and before running the app 
will "solve" the problem.

-- 
Andrew Gaffney                            http://dev.gentoo.org/~agaffney/
Gentoo Linux Developer                                   Installer Project

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