svn pre-commit hook

It was one of those tasks that you think "i'll finish with it in a couple of hours", but i found myself dealing with it for more than 2 days...

A customer asked me to help him with a pre-commit hook that will check the existence of the svn:needs-lock property and the commit message - very simple.
We have the message check in our pre-commit hook, and I found a few examples on the net for the svn:needs-lock property check, but all examples just didn't work!
At the end i used svn contrib check-mime-type.pl, and, although i couldn't find the real differences between my previous tries written as bash script or in perl and this one, it worked.

The final hook is attached.