Il 05/09/2012 15:36, Joachim Schmitz ha scritto:
>>> > > Does your system have a working FIONREAD ioctl for pipes?
>> > It does have FIONREAD ioctl. Whether it works properly is to be
>> > determined...
>> > I'll test if you could show me how?
> Oh, now I see what you aimed at, but no, that Mac OS X method doesn't work
> for me, I tried (at least I think I did).
> And <sys/ioctl.h> has
> * Normal IOCTL's supported by the socket interface
> #define FIONREAD _IOR(0, 8, _ioctl_int) /* Num of bytes to read
> #define FIONBIO _IOW(0, 9, _ioctl_int) /* Non-blocking I/O
> So these seem to be supported on sockets only, I guess.
> And indeed the man pages for ioctl confirms:
> Valid values for the request parameter for AF_INET or
> AF_INET6 sockets are:
> FIONREAD Gets the number of bytes available for reading and
> stores it at the int pointed at by arg.
> So not even AF_UNIX sockets, not to mention pipes...
So there's no way you can support POLLHUP. Your system is quite
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