Unexpected (at least to me) kevent behavior on window size change when in X

[Ivan Radovanovic]

Hi everybody,

I am using kevent(2) to monitor for file changes and I just noticed some 
weird behavior - if program is running within X (in MATE terminal), and 
if it is already blocked on kevent when I change window size kevent 
returns -1 and sets errno to 0.

I am not monitoring anything weird - only normal file descriptors (of 
regular files). This is happening on 10.2-STABLE r291381

The only thing which is out of ordinary is that I am doing this from 
mono, but still I am directly invoking libc functions from it, so I 
don't think it can have anything with it.

Kind regards,
Ivan