upsd(8) on Linux
The text 5b0c718f6cb5, as Debian 2.2 (Potato), Debian 2.1 (Slink), Debian 2.0 (Hamm), Debian 1.3 (Bo) shipped it.
Flags it lists
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-c -
-h -
-i -
-k -
-l -
-m -
-p -
-s -
-t