io_eagain - tell io_wait that you got an EAGAIN

       If  io_wait()  said that you can read from a descriptor, you try to read from it, and you get EAGAIN, you
       need to tell io_wait().  This is important for edge triggered event notification schemes like Linux 2.4's
       SIGIO, or you will lose events.

       io_tryread(), io_trywrite() and io_sendfile() and iob_send() already take care of this for you.

       This function is only of interest if you integrate  io_wait()  with  legacy  code  that  uses  read/write
       directly.

       io_eagain - tell io_wait that you got an EAGAIN

io_wait(3)

                                                                                                    io_eagain(3)

#include<libowfat/io.h>

       void io_eagain(int64 fd);