[chiglug] Uninterruptable Power Supplies Under sysfs

[eviljoel]

Greetings,

I'm writing a Python program that does something based on the state of
an Uninterruptable Power Supply (UPS) being plugged into the wall or
not. I would like to use the psutil Python library to check the state of
the battery, however, this depends on the UPS registering under the
/sys/class/power_supply directory (typically used by laptop batteries).
I tested this with my old APC Back-UPS RS 1500VA and it didn't register
under sysfs, but that UPS was created over 10 years ago. Newer UPSes are
more likely to work favorably.

I'm sure someone on one of these two mailing lists is running Linux on a
computer connected to a modern (non-laptop) UPS. If you are that person,
can you tell me whether your UPS is registered under
/sys/class/power_supply?

In case anyone is wondering. I am specifically targeting Ubuntu 18.04
LTS, so portability isn't really a concern.

Thank you,
eviljoel

-- 
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