Re: NSWorkspace -launchedApplications does not track crashed applications

[Yen-Ju Chen]

On 3/13/07, Richard Frith-Macdonald <rfm@gnu.org> wrote:
> On 13 Mar 2007, at 05:46, Yen-Ju Chen wrote:
>
> > I notice that if an application terminates abnormally,
> > NSWorkspace won't know it and -laucnhedApplications still return that
> > application.
> > The only way I can think about of tracking crashed application
> > is to use NSConnection to it, but I guess it is less efficient.
> > It is very easy to test. Just start an application from command line
> > and use Ctrl-C to terminate it.
> > NSWorkspace still think it is running.
> >
> > Any suggestion ?
>
> That's a documented feature ... the values in -launchedApplications
> are not guaranteed to be up to date.
>
> We can't use NSConnection to tell if an app is alive, because an app
> launched by NSWorkspace could be something which isn't a GNUstep
> application (many app wrappers exist for things like mozilla and gimp).
>
> Solutions *are* possible ... the only really reliable and portable
> one I can think of would be to change our app wrappers to use a tiny
> tool to run the unix/windows native app as a subtask and monitor the
> subtask.

 Sorry for not being clear.
 I am referring to GNUstep application, not XWindow application.
 I can track XWindow application through X protocol.
 For GNUstep application, I guess NSConnection would be my only solution.
 Since it is a documented behavior, I will work my way out.
 By the way, is GNUstep interested to receive a distributed notification
 for abnormally terminated application ?
 As long as the name of notification exists in GNUstep (probably as
GNUstep additional),
 it should be trivial to implement.

 Thanx.

 Yen-Ju

>