1. 根目录:
2. include
3. uapi
4. linux
5. termios.h

#ifndef _LINUX_TERMIOS_H
#define _LINUX_TERMIOS_H

#include <linux/types.h>
#include <asm/termios.h>

#define NFF	5

struct termiox
{
	__u16	x_hflag;
	__u16	x_cflag;
	__u16	x_rflag[NFF];
	__u16	x_sflag;
};

#define	RTSXOFF		0x0001		/* RTS flow control on input */
#define	CTSXON		0x0002		/* CTS flow control on output */
#define	DTRXOFF		0x0004		/* DTR flow control on input */
#define DSRXON		0x0008		/* DCD flow control on output */

#endif