ptpd(8) on Linux
The text 5a628323bdf5, as Debian 7 (Wheezy) shipped it.
Precision Time Protocol daemon (1588-2008)
Flags it lists
-
-? -
-D -
-M -
-R -
-S -
-T -
-a -
-b -
-c -
-d -
-e -
-f -
-g -
-h -
-i -
-l -
-m -
-n -
-o -
-p -
-q -
-r -
-s -
-t -
-u -
-v -
-w -
-x -
-y