[haiku-3rdparty-dev] Re: How to detect if a shutdown is in progress?
- From: Ingo Weinhold <ingo_weinhold@xxxxxx>
- To: haiku-3rdparty-dev@xxxxxxxxxxxxx
- Date: Mon, 30 Jan 2012 03:09:40 +0100
On 2012-01-29 at 13:48:41 [+0100], Brian Hill <perelandra777@xxxxxxxxx> wrote:
> Here is some background on my question. I have written a daemon which
> monitors when applications quit and provides an alert if certain
> applications defined by the user quit. As a background application, the
> daemon is one of the last processes quit during a system shutdown so this
> daemon throws alerts for all the applications it is watching when you shut
> down. In BeOS there was a user shutdown script that I used to quit the
> daemon quickly on a shutdown to prevent these alerts (since obviously you
> are shutting the system down and want everything the quit). Haiku does not
> have this shutdown script function yet.
If that's the case, then patches to fix it are definitely welcome. :-)
> Is there any way to query the shutdown status of the system? I have been
> looking through all the Registrar, TRoster, BRoster, etc code and have not
> found an easy way to query if the system is currently doing a shutdown.
> The only thing I have come up with as an idea is to call
> BRoster::Private.AddApplication with some bogus information and see if it
> returns a B_SHUTTING_DOWN error from the TRoster. Any ideas on how to
> better get the shutdown status?
Using private API isn't that good an idea, since it can change at any time. I
suppose you could use the same strategy just with public API, i.e.
BRoster::Launch() your daemon (which would have to be single/exclusive
launch, so it isn't actually run again). Another option would be to script
the registrar to find out whether the shutdown window is shown, though that
might be a bit fragile as well.
The preferred way would be to add a BRoster::IsShuttingDown() of course.
Again, patches welcome. :-)
CU, Ingo
Other related posts:
