kbdinfo --VERSION (return code: 0)
kbdinfo: invalid option -- '-'
kbdinfo from kbd 1.15.5
kbdinfo --help (return code: 0)
kbdinfo: invalid option -- '-'
Usage: kbdinfo [-C DEVICE] getmode [text|graphics]
or: kbdinfo [-C DEVICE] gkbmode [raw|xlate|mediumraw|unicode]
or: kbdinfo [-C DEVICE] gkbmeta [metabit|escprefix]
or: kbdinfo [-C DEVICE] gkbled [scrolllock|numlock|capslock]