[PD] watchdog -> force restart

[michael strohmann]

> On 18 Feb 2019, at 10:36, Peter P. <peterparker at fastmail.com> wrote:
> 
> * michael strohmann <itsnotfair9 at gmail.com> [2019-02-18 10:22]:
>> good morning, 
> Guten Morgen!
> 
> I know you didn't want this answer, but, is there a chance you can
> figure out why you are getting the watchdog message in Pd in the first
> hand place?

yes, i think/hope i found the reason (network related) but still would be happy to have a safetynet.
can only access wiringPI_gpio in sudo mode (raspberry…)
is it that bad to run pd as superuser?

> 
> Did you already check the results of
> 	aptitude search watchdog
>> 
>> is it possible to automatically restart pd (or the computer) whenever i get 
>> watchdog: signaling pd 
>> ?
>> 
>> in other words: what would be the proper way to monitor a linux system and act upon e.g. CPU usage greater than xy% ?
>> does anyone have experience with ps-watcher?
>> http://ps-watcher.sourceforge.net <http://ps-watcher.sourceforge.net/>
> I just found these:
> https://rt.wiki.kernel.org/index.php/RT_Watchdog
> 
>> i need help understanding this description of the pd-watchdog
>> 
>> s_watchdog.c is the source of pd-watchdog, which was spawned in sys_startgui(). pd-watchdog monitors its stdin for any input, timing out after 5 seconds if nothing was received. In this case it kills pd with a SIGHUP, but normally it will continue looping as long as characters are received from pd' at a rate of at least one every 5 seconds. So if pdtk_watchdog calls pd every 2 seconds and glob_watchdog() sends a CR each time through the pipe, everything runs smoothly.  
>> 
>> 
>> "pd-watchdog monitors its stdin for any input” does this also work if i start pd with -stderr >2/dev/null ?
>> is the fact that i run pd as superuser responsible for pd NOT beeing killed by SIGHUP ?
> Please forgive me, but why do you run Pd as root? Do you really need to
> do so?
> 
> 
> 
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