conflicts between shutdown hooks of nvram-wakeup and e.g. noad

[Christoph Martin]

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Hi Thomas,

Thomas Schmidt schrieb:
> * Thomas Schmidt schrieb am 06.01.05, um 23:10 Uhr:
> 
>>>You could either make the script readable only by user vdr or check in
>>>the script the real against the effective uid and exit if the calling
>>>user is not user vdr.
>>
>>Thank you for your help, will try to implement this during the next
>>weekend.
> 
> Well, the shutdown-hooks are now working as user, i had to write a
> (very small) c-wrapper for this, because it is impossible to run 
> shell-scripts with setuid/setgid. Still need to add the check for
> effective/real uid. Any tips how to realize this? 

In C you have:

       getuid returns the real user ID of the current process.

       geteuid returns the effective user ID of the current process.

But personaly I wood use a suid-perl script to do this. There you have
the variable $< and $> which give you the uids. suid-perl is better
equipped for security checks in suid scripts. You have to use taint
checking etc.

Christoph
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Christoph Martin, EDV der Verwaltung, Uni-Mainz, Germany
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