Reported by: phk
- While here, check the unit before calculating the actually number.
This way we can return EINVAL for invalid unit instead of ERANGE.
Approved by: re (kensmith)
a number in human-readable form is converted to int64_t, for example:
123b -> 123
10k -> 10240
16G -> 17179869184
First version submitted by: Eric Anderson <anderson@freebsd.org>
Approved by: re (bmah)
