Safe shut down

Is there a way to intercept a shut down signal from Gnome on Freebsd to allow the user to perform an orderly exit from Squeak?

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On Fri, Jan 14, 2011 at 09:54:09PM +0100, Bert Freudenberg wrote:
If you mean "shut down signal" in the sense of responding to a SIGHUP
signal, then you can do this using OSProcess. I am away and cannot
check the specific reference but look for a selector containing
'forwardSignal'. This allows you to arrange for the SIGHUP to signal
a Smalltalk semaphore, so if you have a process waiting on that semaphore,
it can do whatever cleanup procedures you have in mind.

If this refers to an X11 event (as opposed to an OS signal), then I
don't know how to do it.

Dave

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Interesting, I found this in a discussion on XSMP:

Newer alternative sessions (GDM Greeter, OLPC Sugar) don't want to support XSMP

http://live.gnome.org/SessionManagement/GnomeSession

In any case I am looking into it.

On Jan 14, 2011 10:54 AM, "Bert Freudenberg" <[hidden email]> wrote:

On 14.01.2011, at 20:48, Gary Dunn wrote:
>
> Is there a way to intercept a shut down signal from Gn...

You would have to modify the VM. If you do, great, we need that for OLPC too:

http://tracker.squeakland.org/browse/SQ-192

- Bert -

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On Sat, Jan 15, 2011 at 5:05 AM, Gary Dunn wrote[1] :

> Interesting, I found this in a discussion on XSMP:
>
> Newer alternative sessions (GDM Greeter, OLPC Sugar) don't want to support
> XSMP
>
> http://live.gnome.org/SessionManagement/GnomeSession
>
> In any case I am looking into it.

Sounds great.  This bug (linked from the above GNOME wiki page) looks
particularly relevant:

https://bugzilla.gnome.org/show_bug.cgi?id=535829

Hope that helps, David

[1] http://lists.squeakfoundation.org/pipermail/beginners/2011-January/007497.html
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All we really need is to clean up a session during shutdown. The simple way is to trap SIGTERM and do the right thing: at the minimum do a save. If possible, prompt user to save yes/no. XSMP and D-BUS do more than Unix signals, such as the option to restart automatically. That sort of thing might be useful, but let's learn to walk first.

Comments welcome.

On Jan 19, 2011 9:24 PM, "David Corking" <[hidden email]> wrote:

On Sat, Jan 15, 2011 at 5:05 AM, Gary Dunn wrote[1] :

> Interesting, I found this in a discussion on XSMP:
>
> Newer alternative sessions (GDM Greeter, O...

Sounds great.  This bug (linked from the above GNOME wiki page) looks
particularly relevant:

https://bugzilla.gnome.org/show_bug.cgi?id=535829

Hope that helps, David

[1] http://lists.squeakfoundation.org/pipermail/beginners/2011-January/007497.html

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On 20.01.2011, at 09:41, Gary Dunn wrote:

> All we really need is to clean up a session during shutdown. The simple way is to trap SIGTERM and do the right thing: at the minimum do a save. If possible, prompt user to save yes/no. XSMP and D-BUS do more than Unix signals, such as the option to restart automatically. That sort of thing might be useful, but let's learn to walk first.
>
> Comments welcome.

Since implementing this is hardly a beginner's topic, let's move the discussion to squeak-dev. Reply-To set.

Catching SIGTERM should be reasonably simple using OSProcess.

There also are D-Bus bindings for Squeak that could be used.

Both options are IMHO inferior to having XSMP support in the VM, which should work across pretty much all X11 desktops. But they appear to be easier to implement.

- Bert -

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On 20.01.2011, at 13:03, Bert Freudenberg wrote:

> Since implementing this is hardly a beginner's topic, let's move the discussion to squeak-dev. Reply-To set.

Meh. Reply-to is getting munged on newbies list. Please adjust headers manually.

- Bert -

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