[cvsnt] how to get the branch information before committing?

[Xiaoyan Jin]

>
> Dear all,
>  In order to make sure the users commit the files to the right branch, I
> try to perform the checking before committing. So I want to catch the branch
> info. It means that before the committing is performed, I need to get the
> info: which branch does the user try to commit. Then I wonder how can I get
> this branch information?
>  Thanks in advance.
>  Greetings,
> Amy
>