Re: [Linux PATCH] fcntl: add new F_OFD_*32 constants and handle them appropriately

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On Thu, Aug 18, 2016 at 01:28:20PM -0400, Jeff Layton wrote:
> That was my original thinking, but several people seemed to think that
> we should just go ahead and support it. TBH, I don't much care either
> way, but we either need to support it properly, or ensure that trying
> to use OFD locks in a non-LFS program fails to compile.

Yes, that's what glibc folks should do for now given that they still
seem to refuse being draggred into the present.

> The only real concern I have here is whether limiting this to LFS
> enabled programs might make it tougher to get this into POSIX. Would
> the POSIX standards folks object to having an interface like this that
> doesn't support non-LFS cases? I guess if that ever happens though,
> then we can just widen the support at that point.

LFS is perfectly Posix compliant (as is non-LFS).  It's really just
a glibc (aka Linux) special to still support non-LFS modes.  4.4BSD
and decendants have made the switch to 64-bit off_t in 1994 and haven't
supported a non-LFS since.
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