nrg2iso --version (return code: 0)
nrg2iso v0.4
nrg2iso -HELP (return code: 255)
Nrg2Iso v0.4 by G. Kokanosky
released under the GNU GPL v2 or later
Usage :
nrg2iso image.nrg image.iso
--version display version number
--help display this notice