.htacces for subdomains

Hi,

I'm setting up a new site, and I would like to do this with subdomains.

Now is my question, how can I rewrite
http://categorie.site.com to
http://www.site.com/index.php?catname=categorie

NOTE: It's ok for me if I have to add each category to my .htacces file, so a new RewriteRule for each categorie is ok!

Thanks,

Tomas

 

Something like :

rewriteCond %{HTTP_HOST} !^www\.
rewriteCond %{HTTP_HOST} ^(.+)\.site\.com
rewriteRule .* /index.php?catname=%1 [L]

Should do the trick