Function fcntl

adapter/micro_thread/mt_sys_hook.cpp:307–334

}

int fcntl(int fd, int cmd, ...)
{
    va_list ap;
    va_start(ap, cmd);
    void* arg = va_arg(ap, void *);
    va_end(ap);

    mt_hook_syscall(fcntl);
    MtHookFd* hook_fd = mt_hook_find_fd(fd); 
    if (!mt_hook_active() || !hook_fd || !ff_hook_active())
    {
        return mt_real_func(fcntl)(fd, cmd, arg);
    }

    if (cmd == F_SETFL)
    {
        va_start(ap, cmd);
        int flags = va_arg(ap, int);
        va_end(ap);
        
        if (flags & O_NONBLOCK) 
        {
            hook_fd->sock_flag |= MT_FD_FLG_UNBLOCK;
        }
    }

    return ff_hook_fcntl(fd, cmd, arg);
}

int listen(int sockfd, int backlog)
{