radioclkd(1) on Linux
The text 989303d87ab2, as Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch) shipped it.
decode time from radio clock(s) attached to serial port
Flags it lists
-
--help -
--poll -
--test -
--version -
-h -
-p -
-t -
-v