[vdr] Re: Heartbeat for VDR

[Klaus Schmidinger <Klaus.Schmidinger@cadsoft.de>]

Jan Ekholm wrote:
> 
> Hi all,
> 
> Our VDR box has two leds that I use to indicate "recording in progress"
> and "VDR is on". However I'd like to make one led flash when VDR has died
> for some reason, or the stream has been broken, actually for anything that
> would require a restart.
> 
> Flashing the led is easy, as is restarting VDR. The harder part is to get
> some kind of "heartbeat" from VDR so that my plugin/patch knows that VDR
> is alive and healthy. What would be a good place to put in such a probe? A
> normal plugin has the Housekeeping() method, but it is not guaranteed to
> be called regularly. I'd like to be able to be notified/probe maybe once a
> minute or something like that.
> 
> One solution could be to create a device and attach it to the stream? That
> would let my plugin get notified often enough, and it would just skip the
> data and do nothing with it. What happens for a broken stream? Does the
> attached device still get called with null data?
> 
> Or is there some much better way of doing this? The main idea is to have
> the plugin/patch somehow write out a timestamp that an external app can
> monitor, and when the timestamp is too old VDR is assumed dead and will be
> restarted.

VDR already has its very own watchdog feature that initiates
a restart in case something goes south.

Have you tried the --watchdog option yet?

Klaus


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