struct	termios {
	tcflag_t	c_iflag;	/* input modes */
	tcflag_t	c_oflag;	/* output modes */
	tcflag_t	c_cflag;	/* control modes */
	tcflag_t	c_lflag;	/* line discipline modes */
	char		c_line;		/* line discipline XXX */
	cc_t		c_cc[NCCS];	/* control chars */
};