Re: [bug-gnulib] poll(2) emulation doesn't work well on a file descriptor

[Paolo Bonzini]

Bruno Haible wrote:
> Daiki Ueno wrote:
>   
> > When I tried a tiny program which uses gnulib's poll(2) emulation on
> > MacOS X 10.4, I found a bug.  gnulib's poll(2) uses recv(2) with
> > MSG_PEEK to support POLLHUP.  However, recv(2) is only applicable to a
> > socket, not to a file descriptor.
> >     
It's much worse than that.  On some other kinds of descriptor, recv 
works, but ignores MSG_PEEK!

I have a similar patch using FIONREAD instead of recv for Mac OS only, 
but the bottom line is that you cannot rely on POLLHUP for Mac OS :-(  
I'll polish the patch and send it soon.

Paolo