rio(1) on Linux
The text 03cc305f4f1b, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge), Debian 3.0 (Woody) shipped it.
program to control a Diamond RIO MP3 player
Flags it lists
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-d -
-di -
-dr -
-dt -
-f -
-g -
-in -
-iy -
-o -
-p -
-u -
-v -
-x -
-z -
-za