Strange NRPE issue

[Francis Dube]

Andreas Ericsson a écrit :
> Francis Dube wrote:
>> Hi,
>>
>> I'm using Nagios nagios-2.12_1 with NRPE nrpe2-2.11_1 to check if my 
>> display is working properly. I'm taking a screenshot every 4 minutes 
>> and then i compare it with the last screenshot. My script is working 
>> very well when it's ran locally but when i'm calling it from the 
>> server the screenshot isn't taken.
>
> Are you running it as the user NRPE is running as when you're taking the
> screenshot locally?
>
>> I tought it was a right problem on the Xorg server, but i tried with 
>> "xhost +" (which do "access control disabled, clients can connect 
>> from any host"). Both ways i run the script with the user 'nagios'. 
>> The rest of the commands in the scripts work fine, the only problem 
>> is with the screenshot which is taken using this command : import 
>> -display :0 -window root /afolder/myscreenshot.png
>>
>> I also tried to run the script over shh (ssh nagios at 1.2.3.4 
>> /usr/local/libexec/nagios/check_news) and this method is working as 
>> fine as locally. So i think there's something wrong with the way NRPE 
>> execute my script.
>>
>> Anyone got an idea of the reason why the screenshot isn't working 
>> when i run the script with NRPE ?
>>
>
> The only thing I can imagine is access problems. By default, only root
> can snoop on other user's X sessions, so for that to work for nrpe the
> X session ought to be owned by the nrpe user. I'm not well-versed in X
> enough to give a definite answer though, so don't trust my word on it.
>
Yes the screenshot is taken with the user 'nagios' which is my NRPE user.
'xhost +' disable access control for X, so i dont think it's the problem.

Thanks.

Francis


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