On Thu, 13 Dec 2007 00:09:52 +0100 Karel Zak wrote:
>
> When creating a new partition in fdisk, if using +sizeK (e.g.
> +1000K) the final size is calculated by
>
> "size * 1024" (it means KiB)
>
> but if using +sizeM:
>
> "size * 1000000" (it means MB)
>
>
> See code:
>
> switch (*line_ptr) {
> case 'c':
> case 'C':
> if (!display_in_cyl_units)
> i *= heads * sectors;
> break;
> case 'K':
> absolute = 1024;
> break;
> case 'k':
> absolute = 1000;
> break;
> case 'm':
> case 'M':
> absolute = 1000000;
> break;
> case 'g':
> case 'G':
> absolute = 1000000000;
> break;
> default:
> break;
> }
> if (absolute) {
> unsigned long long bytes;
> unsigned long unit;
>
> bytes = (unsigned long long) i * absolute;
> unit = sector_size * units_per_sector;
> bytes += unit/2; /* round */
> bytes /= unit;
> i = bytes;
> }
>
>
> It seems like a chaos between KiB, MiB, (2^N) and kB, MB, GB, (10^N).
>
> Does anyone understand this code? I don't believe it's a bug -- it's
> too stupid...
It looks to me like someone decided that only K could mean 2^N
and any other suffix means 10^M.
---
~Randy
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