selinux strangeness

[Zbigniew Koziol]

Jamon Camisso wrote:
> Zbigniew Koziol wrote:
>> This time I am not breaking threads? ;)
>>
>> This is more of out of curiosity, not so much a problem. But it would 
>> be nice to be able to play doom.
>>
>> Centos 5.3 is here, which is supposed to be like RedHat Enterprise of 
>> the same version.
>>
>> I have xdosemu installed, an emulation of DOS. To play doom.
>>
>> Sometime, not always, when I try to start xdosemu, I get this message:
>>
>> /usr/bin/xdosemu: relocation error: /usr/lib/dosemu/libplugin_X.so: 
>> symbol getenv, version GLIBC_2.0 not defined in file libc.so.6 with 
>> link time reference
>>
>> My intuition told me rightly that this is a message from selinux. So, 
>> I go to menu
>> System-> Administration -> Security Level and Firewall. I choose as 
>> root SELinux tab, and disable again Selinux. Sometime that does help. 
>> Sometime it does not...
>
> LD_ASSUME_KERNEL will fix that.
> Read http://people.redhat.com/drepper/assumekernel.html for more.
I did in the past something like that. Perhaps on another system. Dont 
assume however that I understand what I did or what you wrote...
I actually right now do not understand what you wrote... ;)

The situation is really crazy. Now, I find that when I issue "xdosemu" 
command from terminal window, it sometimes works. And.. sometimes it 
does not work, producing error message. This is a something entirely out 
of mind.

>
> People tend to blame selinux for a lot of problems that they haven't 
> encountered before, but generally, if your problem is selinux related, 
> there will be a message in /var/log/messages and 
> /var/log/audit/audit.log.

I know about these messages.
>
> selinux isn't the boogeyman (turn it back on), though I dislike 
> working with it sometimes since the logged messages are rather verbose 
> and yet still somewhat cryptic.
>
I disagree somewhat about all this selinux. If one can not understand 
security, than that is not security.

Besides, what a hell is this selinux for? Anyone around could really 
explain? I mean - I do probably know what for (and I doubt that the 
model used there is really useful commonly), but I want to hear from the 
list.

Regards,

zb.


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