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From: "danny.milo at gmail dot com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug libc/23960] [2.28 Regression]: New getdents{64} implementation
 breaks qemu-user
Date: Fri, 02 Oct 2020 11:03:04 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D23960

--- Comment #62 from Danny Milosavljevic <danny.milo at gmail dot com> ---
(In reply to Florian Weimer from comment #60)
> (In reply to Danny Milosavljevic from comment #59)
> > It's impossible to store a 64 bit result into a 32 bit slot.
>=20
> You can do something like that if you can maintain a translation table.

Mathematically speaking, no, you can't.  There cannot be a 1:1 mapping betw=
een
all 64 bit values and all 32 bit values.

I know what you mean--in practice it could be good enough, if the directory
doesn't have too many entries (or, depending on implementation, telldir isn=
't
called too often--though first that implementation with only telldir doing =
the
counting has to be possible.  Is it?).

But that's just kicking the can down the road--eventually, someone somewhere
will have that many entries.  And then, the mapping will fail.

--=20
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