转载设置标准输入输出流为无缓冲类型

#include
static struct termios stored_settings;

void set_keypress(void)
{
    struct termios new_settings;

    tcgetattr(0,&stored_settings);

    new_settings = stored_settings;

    /* Disable canonical mode, and set buffer size to 1 byte */
    new_settings.c_lflag &= (~ICANON);
    new_settings.c_cc[VTIME] = 0;
    new_settings.c_cc[VMIN] = 1;

    tcsetattr(0,TCSANOW,&new_settings);
    return;
}

void reset_keypress(void)
{
    tcsetattr(0,TCSANOW,&stored_settings);
    return;
}