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Re: /proc/partitions question
- From: Corinna Vinschen <corinna-cygwin at cygwin dot com>
- To: cygwin at cygwin dot com
- Date: Thu, 23 Oct 2003 10:55:12 +0200
- Subject: Re: /proc/partitions question
- References: <OF2F4D9013.064D29F0-ONC1256DC7.004D9A96@icos.be>
- Reply-to: cygwin at cygwin dot com
On Wed, Oct 22, 2003 at 04:21:43PM +0200, erik.cumps@icos.be wrote:
> Sorry, lost the previous mail so can't continue the thread.
>
> I took a look at the sources as cgf suggested and
> have the following question:
>
> in fhandler_proc.cc revision 1.36,
> in function format_proc_partitions() :
>
> after getting the drive geometry with
> 'IOCTL_DISK_GET_DRIVE_GEOMETRY'
> the size of the disk is calculated in bytes and this number is
> right-shifted 6 bits, so that's a division by 64 and that maps
> with the scaling difference of 16 between df and /proc/partitions.
>
> likewise after getting the drive's partition layout with
> 'IOCTL_DISK_GET_DRIVE_LAYOUT'
> the length of each parititions (which is in bytes) is again
> right-shifted 6 bits.
>
> So why the right-shift 6 instead of 10 which would map
> with a blocksize of 1K?
Thanks for tracking this down. I've applied a patch to Cygwin. You
should find the corrected version in the next developers snapshot.
Corinna
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Corinna Vinschen Please, send mails regarding Cygwin to
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