EAGAIN The file descriptor fd refers to a file in addition to a socket and continues to be marked nonblocking (O_NONBLOCK), and the write would block. See open(two) for even more details over the O_NONBLOCK flag. EAGAIN or EWOULDBLOCK The file descriptor fd refers into a socket and has been https://global-miracles.net/Portuguese_AM/publications_port/UCEM/um-curso-em-milagres.pdf