Re: Unchecked flags in statx(2) [Should be fixed before 4.11-final?]

From: Andreas Dilger
Date: Fri Apr 21 2017 - 14:46:03 EST


On Apr 21, 2017, at 7:13 AM, Michael Kerrisk (man-pages) <mtk.manpages@xxxxxxxxx> wrote:
>
> On 04/21/2017 03:01 PM, David Howells wrote:
>> Michael Kerrisk (man-pages) <mtk.manpages@xxxxxxxxx> wrote:
>
>> (3) There's no problem with asking for extra bits, even if the running
>> kerneldoes not support them, because the kernel tells you in its
>> response what fields it actually gave you.
>
> It's this piece that I overlooked. Makes sense, of course.
> Sorry for the noise!

I agree with David that we don't want to return an error if the application
asks for more bits than the kernel supports, otherwise the interface would
be useless.

Maybe this implies that this needs to be explained more clearly in the
statx man page?

Cheers, Andreas





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