On 26 February 2013 11:25, Yaroslav <yarikos@gmail.com> wrote:

> 've come to the conclusion that the code that causes error is intentional


I don't think that code is right. It's correct to return with a bit set in
rfds for a file descriptor that's ready with only an end of file (zero
read).

EBADF should only be given for a file descriptor number that's invalid.

If X11 is reacting to EBADF, I'd expect that would only be because it knows
that it will close a file descriptor when a client vanishes (say), but in
that case,
it's emulated file descriptor in APE should also be closed, and it's the
subsequent attempt to use it (in select or elsewhere) that should produce
EBADF.

In other words, I'd fix select, and then change whatever else needs to be
changed (if anything does) if X11 then stops working.