Re: Antwort: Re: mcedit and file locking

[Pavel Tsekov <ptsekov gmx net>]

On Mon, 25 Sep 2006, karl kappel segmueller de wrote:

> > On Mon, 25 Sep 2006, karl kappel segmueller de wrote:
>
> > > ist there a way to prevent a file being edited with mcedit by different
> > > users at the same time?
>
> > The MC editor has support for so called advisory locking. This
> > means that a lock is not enforced (say at the OS level) and
> > thus anyone can modify the file at any time. This locking scheme
> > relies on the fact that different processes trying to modify the
> > file will notice that a lock exists and act accordingly. In the
> > case of MC the lock is a dead symlink named in a specific way and
> > whose target contains the owner, the hostname and the pid of
> > the processes which locked the file. This locking scheme is
> > recognized by Jed and Emacs - maybe others too.
>
> Where is the dead symlink located?

In the same directory as the file being edited.

> If one user opens a file with mcedit for editing and another user
> does the same with mcedit should he get a message about this fact?

Yes.

> The mc version is 4.5.51 wiht RedHat 7.2

That version doesn't support locking. Locking support was
added starting with MC 4.6.0.