xdm-config for :0 doesn't call Xstartup?

[Chris Sorenson]

Those snippets from your scripts look correct, is your sessreg set to 
executable?

Does anyone else have access to your system?

Might it have been hacked to prevent programs like "w," "who," or 
"lastlog" from showing that someone's ghosted in for nefarious purposes?

> 
> On 10/18/2020 05:11 PM, IL Ka wrote:
> 
> >
> > On Sun, Oct 18, 2020 at 5:35 PM Chris Sorenson <csoren at isd.net> wrote:
> >
> 
> Hello.
> 
> >
> > xdm runs Xstartup on behalf of the user.
> >
> 
> Hmm.. man page says: "After the user logs in, xdm runs the Xstartup 
> script
> as root.".
> 
> There is a $USER argument passed to this script, but the script itself 
> runs
> as root.
> 
> >
> > What does your Xstartup say?
> >
> 
> exec /usr/bin/sessreg  -a -w /var/log/wtmp -u /var/run/utmp -x
> /usr/lib64/X11/xdm/Xservers -l $DISPLAY -h "" $USER
> 
> I am pretty sure the problem is the following line in xdm-config:
> 
> DisplayManager*startup: /usr/lib64/X11/xdm/Xstartup
> ! The following three resources set up display :0 as the console.
> DisplayManager._0.startup: /usr/lib64/X11/xdm/GiveConsole
> 
> GiveConsole is:
> chown $USER /dev/console
> 
> So, sessreg is simply not called when xdm serves screen :0
> 
> I was able to fix it by copying sessreg line to the GiveConsole, but it
> looks like a strange hack..
> Ilya
>