Re: [Bug-tar] Detection of sparse files is broken on btrfs

[Joerg Schilling]

Paul Eggert <address@hidden> wrote:

> On 01/18/2018 02:33 AM, Joerg Schilling wrote:
> > Returning a value for st_blocks, that changes with the phases of the moon 
> > while
> > the content of that file is not changed is another unexpected behavior.
>
> Not at all. It's completely expected nowadays, for the same reason that 
> invoking statvfs twice on the same file might return different results, 
> even if no application has made any change to any file. Nothing in POSIX 
> says or implies that an implementation cannot spontaneously change the 
> amount of available space in a file system, or that it cannot 
> spontaneously change the amount of space that a file is using.

Sorry, but this is not related to our topic. If you change the filesystem, it 
may result in a change of available free space.

Maybe, we should delay this discussion until you present us arguments for your 
whishes.

Jörg

-- 
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