cdir --VERSION (return code: 0)
cdir: invalid option -- '-'
cdir CDTOOL 2.1.8 (c) 1994-2004 Thomas Insel, et al. Licensed under GPL.
cdir -HELP (return code: 1)
cdir: invalid option -- '-'
cdir: invalid option -- 'e'
cdir: invalid option -- 'l'
cdir: option requires an argument -- 'p'
CDTOOL 2.1.8 (c) 1994-2004 Thomas Insel, et al. Licensed under GPL.
usage: cdir [ [-n] {-s|-t} ]
-n listing without titles
-r raw read of toc
-s short listing (title/artist/track)
-t print template for database entry
-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