[Samba] posix locking - what does it do?

Jeremy Allison jra at samba.org
Tue Jun 22 15:43:41 GMT 2004

On Tue, Jun 22, 2004 at 11:17:50AM +0200, Rudolf Polzer wrote:
> What exactly does the POSIX locking option do?
> I know what it does NOT do: flock() the files a Windows machine has
> locked. When for example a file is locked on server side (Linux,  I
> tried all three Debian samba releases from stable, testing and
> unstable), notepad on Windows still opens it. If it however is locked by
> a Windows application on another computer, notepad refuses.
> Does "posix locking" perhaps map SMB locks to something else than
> flock()?

Yes, it maps them into POSIX fcntl byte-range locks.


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