gistfile1.c

void accept_cb(EV_P_ ev_io *io, int revents)
{
    int client_fd;
    socklen_t len;
    struct sockaddr_in client_addr;

    len = sizeof(client_addr);

    client_fd = accept(io->fd, (struct sockaddr *)&client_addr, &len);
    fcntl(client_fd, F_SETFL, O_NONBLOCK);

    ev_io_init(&ctx->io, read_cb, client_fd, EV_READ);
    ev_io_start(EV_A_ &ctx->io);
}