char in_buffer[BUFFER_SIZE], out_buffer[BUFFER_SIZE];
size_t in_buffer_full = 0, out_buffer_full = 0;
struct epoll_event stdin_ev, stdout_ev, master_ev, signal_ev;
char in_buffer[BUFFER_SIZE], out_buffer[BUFFER_SIZE];
size_t in_buffer_full = 0, out_buffer_full = 0;
struct epoll_event stdin_ev, stdout_ev, master_ev, signal_ev;