Am 03.08.21 um 15:21 schrieb Andrew C Aitchison:
> On Tue, 3 Aug 2021, Ekkard Gerlach wrote:
>
>>
>> Am 03.08.21 um 13:04 schrieb Andrew C Aitchison:
>>> On Tue, 3 Aug 2021, Ekkard Gerlach wrote:
>>>
>>>> Hello,
>>>>
>>>> /etc/X11/xdm/Xsetup_0 in� is NOT executed, what could be the
>>>> reason? I inserted on top of file
>>>>
>>>> echo "hello123" > /tmp/test123
>>>> and the file is not created! Who can help?
>>>>
>>>>
>>>> I'm managing SL 6.10, its deprecated I know, but no way arround,
>>>> its server of a customer
>>>>
>>>> Finally I want to start x11vnc in Xsetup_0, like I am used to do it
>>>> in Suse-Installations with /etc/X11/xdm/Xsetup , the it works
>>>> perfectly sind 15 years. Now my first contact to SL/ RedHat.
>>>>
>>>> Background: red hat tells that Xsetup_0 is for customizing login:
>>>> https://urldefense.proofpoint.com/v2/url?u=https-3A__access.redhat.com_documentation_en-2Dus_red-5Fhat-5Fenterprise-5Flinux_6_html_deployment-5Fguide_s2-2Dx-2Drunlevels-2D5&d=DwIDaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=Dq-MpJGgrN62yZIjutYfq8EYG0EbKB8dC2ZlUyxqzow&s=QaZZQ2Tkquk3iYp8e0fk2EoNrcyjXqoBRC4pEku3F6U&e=
>>>>
>>>> Xsetup_0 is the right file to do customizations in red hat, here a
>>>> comparison of Suse and Red Hat: https://urldefense.proofpoint.com/v2/url?u=https-3A__virtualgl.org_vgldoc_2-5F0_&d=DwIDaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=Dq-MpJGgrN62yZIjutYfq8EYG0EbKB8dC2ZlUyxqzow&s=lhkiTf2EjX-JKMq9Gm94Rtol8jiI8Bn8fTa1DQVU03Q&e=
>>>
>>>
>>> I still have a Scientific Linux 6 "virtual machine" (actually a chroot
>>> "container") so I may be in a better position to help than most.
>>>
>>> Are you using display :0 and display manager xdm (not gdm or kdm) ?
>>
>> I just detected one big bug on my side: gdm is *not* using xdm! They
>> are different. (you ask the same)
>>
>> Thats why gdm does not care about Xsetup_0 , the file belongs to xdm!
>>
>> Then I searched the aquivalent for gdm: and I found
>> /etc/gdm/Init/Default :
>> https://urldefense.proofpoint.com/v2/url?u=https-3A__tldp.org_HOWTO_XFree-2DLocal-2Dmulti-2Duser-2DHOWTO_automation-5Flogin-5Fscreen.html&d=DwIDaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=Dq-MpJGgrN62yZIjutYfq8EYG0EbKB8dC2ZlUyxqzow&s=leXfN9gl1I-KUqKuVKPcTVocsWjZMR3WqaKuFUyVy4k&e=
>>
>> On my SL 6.10 there is neither a "Init" directory no "Default".
>
> Odd. My SL6.10 has /etc/gdm/Init/Default - from gdm-2.30.4-69.el6
> # ls -Z /etc/gdm/Init/Default
> -rwxr-xr-x. root root system_u:object_r:bin_t:s0 /etc/gdm/Init/Default
with "X11"!! => /etc/X11/gdm/Init/Default . I find
/etc/gdm/Init/Default on my installation, too. But its not executed
either, I inserted
echo "hello123" > /tmp/test123.txt
but no file created.
>
> Might be worth reinstalling the gdm package.
>
>> I created Init directory, then created a "Default", with bash script
>> inside that makes that echo "Hello">/tmp/test123.txt
>>
>> But /etc/gdm/Init/Default is not executed/ used, I chmod +x , but
>> does not help.
>>
>> Then I detected a registered bug, that "Default" is not used due to
>> selinux policy: https://urldefense.proofpoint.com/v2/url?u=https-3A__bugzilla.redhat.com_show-5Fbug.cgi-3Fid-3D851769&d=DwIDaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=Dq-MpJGgrN62yZIjutYfq8EYG0EbKB8dC2ZlUyxqzow&s=-Q6L47IuzALIbyRKBST_XaSkVh8H2kZDp_9ZdvaCpkw&e=
>>
>> Can you help me for next steps?
>
> Reading that bugzilla, I think that they did find a fix (at comment 9)
> chcon -Rt bin_t /etc/gdm/Init
> but SELinux (RH's equivalent of apparmor) kept changing with newer
> versions of Fedora.
> If you can try permissive mode in /etc/selinux/config (IIRC you need
> to reboot after changing it) that should bypass theisue and give you
> better diagnostics.
>
> Do you/your client need to do this for all users ?
yes, desktop support for the XDMCP thinclients. I can even login at
their xdm with different users (so far,. with Suse installations)
> If not you could add your X11vnc command to $HOME/.Xclients
.Xclients did not exist yet. I created, but nothing happens with code
inside, I tested echo "kkkk" > /tmp/test6787.txt
>
> As the system isn't going to change now, you could modify
> /etc/gdm/Xsession which is a symlink to /etc/X11/xinit/Xsession
thats already done!
>
> I haven't run the X server or xdm/gdm on my SL6 VM/container
> and I am not sure how, since I don't actually boot it
> (I just chroot the image and run X clients on the host display.
>
> Do you need both the hardware display and the VNC mirror,
> or could you just run a standalone VNC server ?
I need hardware display for support. Its a new server, now with SL6.10.
Suse so far.
I can start x11vnc manually always, or perhaps automatically after user
logged in. But I prefer to make login at gdm.
tia
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