EAGAIN The file descriptor fd refers to some file aside from a socket and is marked nonblocking (O_NONBLOCK), as well as the write would block. See open up(two) for additional information to the O_NONBLOCK flag. EAGAIN or EWOULDBLOCK The file descriptor fd refers into a socket and has become marked https://www.youtube.com/channel/UCTleG6-484F7WHZD0hAjRRw