rio(1) on Linux
The text 251cefc734b1, as Debian 2.2 (Potato) shipped it.
program to control a Diamond RIO MP3 player
Flags it lists
-
-d -
-di -
-dr -
-dt -
-f -
-g -
-in -
-iy -
-o -
-p -
-u -
-v -
-x -
-z -
-za