bug#11406: Bug? df uses f_bsize instead of f_frsize to calculate file system sizes

[Paul Eggert]

On 05/11/2012 03:42 AM, Jim Meyering wrote:
> it's not clear that there is even a problem with our
> current use of statfs on glibc-based Linux systems.

Yes, I find it curious.  GNU/Linux statvfs
simply invokes statfs internally, right?
So why should it matter whether df uses statvfs
or statfs?  And yet from Nikolaus Rath's evidence
it does appear that we have a problem with current FUSE systems.

In the long run I'd rather have the Linux-based code
use statvfs, since that's the more-standard interface.

Nikolaus, does the attached hack fix things for you?
Basically, it transforms a configure-time test into a
run-time test.  After applying this patch,
you'll need to run autoreconf + configure before 'make'.

fsusage-diff.txt
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