files > 2GB

[Miquel van Smoorenburg]

In article <cistron.Pine.LNX.4.10.10001251153450.7863-100000 en ps.cus.umist.ac.uk>,
Riley Williams  <rhw en MemAlpha.CX> wrote:
> Q. What should the kernel do when, in the middle of executing a
>    function that returns a 32-bit off_t value, it finds itself
>    referring to a file whose length is too large to be stored in
>    such a value?

You can only open files >= 2GB if you pass the O_LARGEFILE flag
to open(2). Otherwise open() will simply fail. As legacy apps do
not set O_LARGEFILE, there is no problem.

If you do open a file >= 2GB with O_LARGEFILE but then use stat()
instead of stat64(), the results are probably not defined. And
the kernel may choose to exec /usr/local/bin/nethack at that point.

Mike.
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