On Tue, Dec 20, 2005 at 03:17:27PM +0200, Niko Tyni wrote: > Using fcntl() locks from Perl seems a bit tricky, since I'll have to > pack() the lock argument together myself. I need some advice here. OK, I found this trick in Mail::Box::Locker::Posix (in libmail-box-perl): fcntl($file, F_SETLK, pack('s @256', F_WRLCK)) I assume the 256 means "so many zero bytes that it's certainly enough". That's good enough for me too. Sorry for the noise. -- Niko