Re: [PATCH] rtcwake: support not suspending

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On Sun, 2009-01-25 at 18:53 +0100, Marco d'Itri wrote:
> On Jan 25, Gabriel Burt <gburt@xxxxxxxxxx> wrote:
> 
> > On Sun, 2009-01-25 at 17:44 +0100, Marco d'Itri wrote:
> > > People usually want to use pm-utils to suspend the system instead of
> > > the raw kernel interface, so I added an option to just exit after
> > > configuring the wakeup time.
> 
> > Isn't this what the "on" option did already?
> No, "on" keeps waiting until the alarm fires. Even worse, if you do
> something like "rtcwake -m on -s 60 & pm-utils suspend" then rtcwake
> will miss the event and stay around forever keeping the rtc fd open and
> preventing other applications from accessing it.
> I am not attached to these changes, but something is needed to make
> rtcwake actually useful. I can't see how it could be used with pm-utils
> in its present form nor the use cases for directly accessing the kernel
> suspend interface.

I got pm-utils to use rtcwake by calling out to it in a pm-utils hooks
like this:

sh -c "$rtcwake_cmd -m on -s $seconds_from_now &"

Gabriel

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