Detecting root directory of repositiory

Is there a way to detect that current directory is the root of SVN
repositiory by reading files into .svn directory ?

I think "svn info" could be used for that. Problem is that some machines
may not have access to "svn" command line (if using tortoise and svn is not
in command PATH for example).

In case "svn info" (or any other command line) is the only way, what would
be the proper way to do it ?

Thank you,

-- 
*Nicolas RAMZ*
*Développeur Web*
nicolas.ramz_at_gmail.com | +33 6 43 34 73 47
www.warpdesign.fr | @warpdesign <http://www.twitter.com/warpdesign_>_
<https://www.twitter.com/warpdesign_>
windowsfun.fr | @wp_fun <https://twitter.com/wp_fun>