[Gambas-user] Saving settings on system shutdown
charlie at cogier.com
Mon Oct 4 15:50:59 CEST 2021
On 04/10/2021 11:04, Bruce Steers wrote:
> On Sun, 3 Oct 2021 at 15:46, bb <adamnt42 at gmail.com
> <mailto:adamnt42 at gmail.com>> wrote:
> On Sun, 2021-10-03 at 11:59 +0100, Bruce Steers wrote:
> > I have a program that starts with my system and runs in the
> > background.
> > It has icons i can move and on exit it saves the positions.
> > I have noticed if i do not exit the program but shutdown the
> > the
> > settings do not save.
> > Of course i could just save the settings on moving icons but i
> > wondered if
> > there is a recommended method to catch an application exit due to a
> > shutdown?
> > Does the system just kill the program?
> > I guessed DBus would probably be the best alternative way but
> > wouldn't hurt
> > to ask the experts if there is already an easier way.
> > Thanks for any advice :)
> > BruceS
> > ----[ http://gambaswiki.org/wiki/doc/netiquette
> <http://gambaswiki.org/wiki/doc/netiquette> ]----
> This is an "I think" answer.
> IT it depends on the distro.
> IT most shutdowns for sysvinit systems use /etc/rc0.d/ scripts one of
> which (say "K02sendsigs") controls the ending of "all" processes in
> some manner, e.g. by sending them a SIGxxx (usually? a SIGHUP) signal
> and then possibly waiting until "them" exits (or if they dont, then
> killing them).
> IT I dont know how systemd does it but hopefully it involves a signals
> based method as well.
> So, IT you should implement signal handling for your program via
> gb.signal, find out whether you can trap the shutdown SIG used and
> do whatever you need.
> Interested in the answer btw.
> Cheers folks
> Got no results yet.
> have tried catching various signals SIGQUIT SIGPWR SIGHUP
> Computer just shuts down, no activity from application.
> Benoit. what does the gambas runtime do with my app on a shutdown call?
> is it a non intercept-able method that just kills the app so any
> attempt at catching would be a waste of time?
> Or is it completely unhandled?
> Thanks (to all who advise)
Why not save any Settings changes as they occur, then it wont matter if
the program is force closed on shutdown.
> ----[ http://gambaswiki.org/wiki/doc/netiquette ]----
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