who runs the hook scripts?

Hi all,
I'm trying to tweak subversion, and I would like to know how the hook
scripts are run. I'm pretty sure that it's httpd when you access the
repository with Apache. But when a client uses the file:// protocol, it
looks like he is the one who runs the script. Am I right?

However, is there any way I can change the user that runs the script?
eg, let's say I want a hook script to be run every time someone commits. I
have a client using httpd to access repository, and the other one works on
the server, so he access the repos with file://. Is there any way that
when the second user commits, the post-commit script is run by an httpd
user?

I hope i'm clear enough, and thanx for your help.

-- 
Erwan Lacoste
Stagiaire
RHAPSO
1, rue Galvani
91300 Massy
Tel +33 (0)1 60 13 79 50
Fax +33 (0)1 69 32 19 61
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