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 crippled. :( Paolo -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html