cdown --VERSION (return code: 0)
cdown: invalid option -- '-'
cdown 0.6
cdown -h (return code: 1)
cdown: get CD info from cddb database
usage: cddb [-{1..9}] [-d D] [-H H] [-P P] [-v] [-V|-h|-?]
cddb get database for default CDROM
-d device specify the CDROM device
-H host get database using HOST (def=freedb.freedb.org)
-P port get database using PORT (def=888)
-l list available cddb hosts
-N, N={1..9} specify /dev/cdromN (def=/dev/cdrom)
-r output raw CDDB entry
-v verbose output
-D enable debugging information
-V print version, exit
-?|-h print help, exit