cdinfo --VERSION (return code: 0)
cdinfo: invalid option -- '-'
cdinfo CDTOOL 2.1.8 (c) 1994-2004 Thomas Insel, et al. Licensed under GPL.
cdinfo -HELP (return code: 1)
cdinfo: invalid option -- '-'
cdinfo: invalid option -- 'e'
cdinfo: invalid option -- 'l'
cdinfo: option requires an argument -- 'p'
CDTOOL 2.1.8 (c) 1994-2004 Thomas Insel, et al. Licensed under GPL.
usage: cdinfo [ {-a|-r|-s|-t} ]
-a print absolute disc time
-r print relative track time
-s print audiostatus
-t print current track
-v print status, track, absolute, relative
-V build, version, and this help
-? -h print this message
-[0-9] use device /dev/cdrom[0-9]
-d dev use device dev
-D enable debugging information