record locking

[Matthias Weiss]

Hi all!

I'd need the UNIX file access locking mechanism like
flock(2) for doing protected database operations.

AFAIK I have to do an additional "open" call to the
libc API to get a file descriptor that allows me
to use flock.

So my request would be to integrate this in the fstream
class as an extension or to add a member function that 
returns the file descriptor.

matthias