if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
#else
if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)
if (!cnew->blocking && ioctlsocket(cnew->iofile, FIONBIO, &tru) < 0)
#else
if (!cnew->blocking && fcntl(cnew->iofile, F_SETFL, O_NONBLOCK) < 0)