ptp4l(8) on Linux
The text 1d6433f7a1c8, as Debian 13 (Trixie) shipped it.
PTP Boundary/Ordinary/Transparent Clock
Flags it lists
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-2 -
-4 -
-6 -
-A -
-E -
-H -
-L -
-P -
-S -
-h -
-m -
-q -
-s -
-v