[GNC] Locked out of gnucash

[David Carlson]

If I understand, Derek, you are proposing a change to GnuCash code to
improve it's behavior.

Going back to the original question, which was about the confusing wording
of the warning, if the code is changed, should there be warnings tailored
to each of the three cases?

Note: Case 1 might mean that some third party app such as a file editor may
be mucking around.  Is this true?  Is it possible to test the PID to see if
it is dead or alive?

On Mon, Nov 25, 2019 at 11:47 AM Derek Atkins <derek at ihtfp.com> wrote:

> Adrien Monteleone <adrien.monteleone at lusfiber.net> writes:
>
> >> Again, if user A has a data file open, user B shouldn't also open
> >> the file. I don't see how a check for Gnucash instances could work
> >> to prevent precisely this problem, since my machine won't have any
> >> Gnucash instances running--but the file IS being used.
> >
> > I agree, using the PID won’t work, because although GnuCash is not
> > (yet) a multi-user app, some people do use it from various machines
> > with the file stored on a network. A PID check won’t mean anything to
> > one machine when that PID belongs to a different machine.
>
> Using a "machine-name + PID" will absolutely work, because:
> 1) If the machine-name is the local machine, you can check the PID and
>    if the PID is not gnucash, you know it was an unclean exist.
>
> 2) If the machine-name is the local machine, you can check the PID and
>    if the PID IS gnucash, you know there is another running instance.
>
> 3) If the machine-name is NOT the local machine, then you cannot
>    differentiate what's going on and should ask.  Most likely it IS open,
>    but there's no good way to tell.
>
> The good news is that #1 and #2 ARE the most common use-cases today, so
> we should implement that.
>
> > Regards,
> > Adrien
>
> > Please remember to CC this list on all your replies.
> > You can do this by using Reply-To-List or Reply-All.
>
> -derek
> --
>        Derek Atkins                 617-623-3745
>        derek at ihtfp.com             www.ihtfp.com
>        Computer and Internet Security Consultant
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-- 
David Carlson