On 30/11/2019 19:34, The Natural Philosopher wrote:
> On 30/11/2019 16:38, druck wrote:
>> For example, to get a running average of the CPU temperature over a 
>> period of 15 minutes, I wrote a python program which runs as a daemon
>> at start up, reading the CPU temperature every second calculating the
>> running average, min and max values. The values are read by running 
>> another instance of the program which communicates with the daemon 
>> instance via a named pipe.
>>
> 
> I actually did something simuilar to get data from a sound deamon back
> to a contrilling web browser, but I didn't use a pipe. I created a 
> ramdiosk of a few K  and mounted that and wrote a file in it. Daemon 
> writes: browser reads.
> 
> Very simple.
> 
> Cant ever fill up. It just gets overwritten by 'current state' every so 
> often...

The only problem being if someone tries reading while it being 
re-written. Did you use advisory locking, or a write and replace strategy?

---druck

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