mkfontdir -v (return code: 0)
mkfontscale 1.1.2
mkfontdir -h (return code: 1)
Usage:
mkfontscale [ -b ] [ -s ] [ -o filename ] [-x suffix ]
[ -a encoding ] [ -f fuzz ] [ -l ]
[ -e directory ] [ -p prefix ] [ -n ] [ -r ]
[-u] [-U] [-v] [ directory ]...