[linux.git] / include / linux / tty.h

#ifndef _LINUX_TTY_H
#define _LINUX_TTY_H

/*
 * 'tty.h' defines some structures used by tty_io.c and some defines.
 */

#ifdef __KERNEL__
#include <linux/fs.h>
#include <linux/major.h>
#include <linux/termios.h>
#include <linux/workqueue.h>
#include <linux/tty_driver.h>
#include <linux/tty_ldisc.h>
#include <linux/mutex.h>

#include <asm/system.h>


/*
 * (Note: the *_driver.minor_start values 1, 64, 128, 192 are
 * hardcoded at present.)
 */
#define NR_PTYS	CONFIG_LEGACY_PTY_COUNT   /* Number of legacy ptys */
#define NR_UNIX98_PTY_DEFAULT	4096      /* Default maximum for Unix98 ptys */
#define NR_UNIX98_PTY_MAX	(1 << MINORBITS) /* Absolute limit */
#define NR_LDISCS		17

/* line disciplines */
#define N_TTY		0
#define N_SLIP		1
#define N_MOUSE		2
#define N_PPP		3
#define N_STRIP		4
#define N_AX25		5
#define N_X25		6	/* X.25 async */
#define N_6PACK		7
#define N_MASC		8	/* Reserved for Mobitex module <[email protected]> */
#define N_R3964		9	/* Reserved for Simatic R3964 module */
#define N_PROFIBUS_FDL	10	/* Reserved for Profibus <[email protected]> */
#define N_IRDA		11	/* Linux IrDa - http://irda.sourceforge.net/ */
#define N_SMSBLOCK	12	/* SMS block mode - for talking to GSM data */
				/* cards about SMS messages */
#define N_HDLC		13	/* synchronous HDLC */
#define N_SYNC_PPP	14	/* synchronous PPP */
#define N_HCI		15	/* Bluetooth HCI UART */
#define N_GIGASET_M101	16	/* Siemens Gigaset M101 serial DECT adapter */

/*
 * This character is the same as _POSIX_VDISABLE: it cannot be used as
 * a c_cc[] character, but indicates that a particular special character
 * isn't in use (eg VINTR has no character etc)
 */
#define __DISABLED_CHAR '\0'

/*
 * This is the flip buffer used for the tty driver.  The buffer is
 * located in the tty structure, and is used as a high speed interface
 * between the tty driver and the tty line discipline.
 */
#define TTY_FLIPBUF_SIZE 512

struct tty_buffer {
	struct tty_buffer *next;
	char *char_buf_ptr;
	unsigned char *flag_buf_ptr;
	int used;
	int size;
	int commit;
	int read;
	/* Data points here */
	unsigned long data[0];
};

struct tty_bufhead {
	struct delayed_work work;
	struct semaphore pty_sem;
	spinlock_t lock;
	struct tty_buffer *head;	/* Queue head */
	struct tty_buffer *tail;	/* Active buffer */
	struct tty_buffer *free;	/* Free queue head */
	int memory_used;		/* Buffer space used excluding free queue */
};
/*
 * The pty uses char_buf and flag_buf as a contiguous buffer
 */
#define PTY_BUF_SIZE	4*TTY_FLIPBUF_SIZE

/*
 * When a break, frame error, or parity error happens, these codes are
 * stuffed into the flags buffer.
 */
#define TTY_NORMAL	0
#define TTY_BREAK	1
#define TTY_FRAME	2
#define TTY_PARITY	3
#define TTY_OVERRUN	4

#define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
#define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
#define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
#define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
#define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
#define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])
#define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])
#define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])
#define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
#define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
#define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
#define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])
#define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])
#define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])
#define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
#define LNEXT_CHAR(tty)	((tty)->termios->c_cc[VLNEXT])
#define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])

#define _I_FLAG(tty,f)	((tty)->termios->c_iflag & (f))
#define _O_FLAG(tty,f)	((tty)->termios->c_oflag & (f))
#define _C_FLAG(tty,f)	((tty)->termios->c_cflag & (f))
#define _L_FLAG(tty,f)	((tty)->termios->c_lflag & (f))

#define I_IGNBRK(tty)	_I_FLAG((tty),IGNBRK)
#define I_BRKINT(tty)	_I_FLAG((tty),BRKINT)
#define I_IGNPAR(tty)	_I_FLAG((tty),IGNPAR)
#define I_PARMRK(tty)	_I_FLAG((tty),PARMRK)
#define I_INPCK(tty)	_I_FLAG((tty),INPCK)
#define I_ISTRIP(tty)	_I_FLAG((tty),ISTRIP)
#define I_INLCR(tty)	_I_FLAG((tty),INLCR)
#define I_IGNCR(tty)	_I_FLAG((tty),IGNCR)
#define I_ICRNL(tty)	_I_FLAG((tty),ICRNL)
#define I_IUCLC(tty)	_I_FLAG((tty),IUCLC)
#define I_IXON(tty)	_I_FLAG((tty),IXON)
#define I_IXANY(tty)	_I_FLAG((tty),IXANY)
#define I_IXOFF(tty)	_I_FLAG((tty),IXOFF)
#define I_IMAXBEL(tty)	_I_FLAG((tty),IMAXBEL)
#define I_IUTF8(tty)	_I_FLAG((tty),IUTF8)

#define O_OPOST(tty)	_O_FLAG((tty),OPOST)
#define O_OLCUC(tty)	_O_FLAG((tty),OLCUC)
#define O_ONLCR(tty)	_O_FLAG((tty),ONLCR)
#define O_OCRNL(tty)	_O_FLAG((tty),OCRNL)
#define O_ONOCR(tty)	_O_FLAG((tty),ONOCR)
#define O_ONLRET(tty)	_O_FLAG((tty),ONLRET)
#define O_OFILL(tty)	_O_FLAG((tty),OFILL)
#define O_OFDEL(tty)	_O_FLAG((tty),OFDEL)
#define O_NLDLY(tty)	_O_FLAG((tty),NLDLY)
#define O_CRDLY(tty)	_O_FLAG((tty),CRDLY)
#define O_TABDLY(tty)	_O_FLAG((tty),TABDLY)
#define O_BSDLY(tty)	_O_FLAG((tty),BSDLY)
#define O_VTDLY(tty)	_O_FLAG((tty),VTDLY)
#define O_FFDLY(tty)	_O_FLAG((tty),FFDLY)

#define C_BAUD(tty)	_C_FLAG((tty),CBAUD)
#define C_CSIZE(tty)	_C_FLAG((tty),CSIZE)
#define C_CSTOPB(tty)	_C_FLAG((tty),CSTOPB)
#define C_CREAD(tty)	_C_FLAG((tty),CREAD)
#define C_PARENB(tty)	_C_FLAG((tty),PARENB)
#define C_PARODD(tty)	_C_FLAG((tty),PARODD)
#define C_HUPCL(tty)	_C_FLAG((tty),HUPCL)
#define C_CLOCAL(tty)	_C_FLAG((tty),CLOCAL)
#define C_CIBAUD(tty)	_C_FLAG((tty),CIBAUD)
#define C_CRTSCTS(tty)	_C_FLAG((tty),CRTSCTS)

#define L_ISIG(tty)	_L_FLAG((tty),ISIG)
#define L_ICANON(tty)	_L_FLAG((tty),ICANON)
#define L_XCASE(tty)	_L_FLAG((tty),XCASE)
#define L_ECHO(tty)	_L_FLAG((tty),ECHO)
#define L_ECHOE(tty)	_L_FLAG((tty),ECHOE)
#define L_ECHOK(tty)	_L_FLAG((tty),ECHOK)
#define L_ECHONL(tty)	_L_FLAG((tty),ECHONL)
#define L_NOFLSH(tty)	_L_FLAG((tty),NOFLSH)
#define L_TOSTOP(tty)	_L_FLAG((tty),TOSTOP)
#define L_ECHOCTL(tty)	_L_FLAG((tty),ECHOCTL)
#define L_ECHOPRT(tty)	_L_FLAG((tty),ECHOPRT)
#define L_ECHOKE(tty)	_L_FLAG((tty),ECHOKE)
#define L_FLUSHO(tty)	_L_FLAG((tty),FLUSHO)
#define L_PENDIN(tty)	_L_FLAG((tty),PENDIN)
#define L_IEXTEN(tty)	_L_FLAG((tty),IEXTEN)

struct device;
struct signal_struct;
/*
 * Where all of the state associated with a tty is kept while the tty
 * is open.  Since the termios state should be kept even if the tty
 * has been closed --- for things like the baud rate, etc --- it is
 * not stored here, but rather a pointer to the real state is stored
 * here.  Possible the winsize structure should have the same
 * treatment, but (1) the default 80x24 is usually right and (2) it's
 * most often used by a windowing system, which will set the correct
 * size each time the window is created or resized anyway.
 * 						- TYT, 9/14/92
 */
struct tty_struct {
	int	magic;
	struct tty_driver *driver;
	int index;
	struct tty_ldisc ldisc;
	struct mutex termios_mutex;
	struct ktermios *termios, *termios_locked;
	char name[64];
	struct pid *pgrp;
	struct pid *session;
	unsigned long flags;
	int count;
	struct winsize winsize;
	unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
	unsigned char low_latency:1, warned:1;
	unsigned char ctrl_status;
	unsigned int receive_room;	/* Bytes free for queue */

	struct tty_struct *link;
	struct fasync_struct *fasync;
	struct tty_bufhead buf;
	int alt_speed;		/* For magic substitution of 38400 bps */
	wait_queue_head_t write_wait;
	wait_queue_head_t read_wait;
	struct work_struct hangup_work;
	void *disc_data;
	void *driver_data;
	struct list_head tty_files;

#define N_TTY_BUF_SIZE 4096
	
	/*
	 * The following is data for the N_TTY line discipline.  For
	 * historical reasons, this is included in the tty structure.
	 */
	unsigned int column;
	unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
	unsigned char closing:1;
	unsigned short minimum_to_wake;
	unsigned long overrun_time;
	int num_overrun;
	unsigned long process_char_map[256/(8*sizeof(unsigned long))];
	char *read_buf;
	int read_head;
	int read_tail;
	int read_cnt;
	unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
	int canon_data;
	unsigned long canon_head;
	unsigned int canon_column;
	struct mutex atomic_read_lock;
	struct mutex atomic_write_lock;
	unsigned char *write_buf;
	int write_cnt;
	spinlock_t read_lock;
	/* If the tty has a pending do_SAK, queue it here - akpm */
	struct work_struct SAK_work;
};

/* tty magic number */
#define TTY_MAGIC		0x5401

/*
 * These bits are used in the flags field of the tty structure.
 * 
 * So that interrupts won't be able to mess up the queues,
 * copy_to_cooked must be atomic with respect to itself, as must
 * tty->write.  Thus, you must use the inline functions set_bit() and
 * clear_bit() to make things atomic.
 */
#define TTY_THROTTLED 		0	/* Call unthrottle() at threshold min */
#define TTY_IO_ERROR 		1	/* Canse an I/O error (may be no ldisc too) */
#define TTY_OTHER_CLOSED 	2	/* Other side (if any) has closed */
#define TTY_EXCLUSIVE 		3	/* Exclusive open mode */
#define TTY_DEBUG 		4	/* Debugging */
#define TTY_DO_WRITE_WAKEUP 	5	/* Call write_wakeup after queuing new */
#define TTY_PUSH 		6	/* n_tty private */
#define TTY_CLOSING 		7	/* ->close() in progress */
#define TTY_LDISC 		9	/* Line discipline attached */
#define TTY_HW_COOK_OUT 	14	/* Hardware can do output cooking */
#define TTY_HW_COOK_IN 		15	/* Hardware can do input cooking */
#define TTY_PTY_LOCK 		16	/* pty private */
#define TTY_NO_WRITE_SPLIT 	17	/* Preserve write boundaries to driver */
#define TTY_HUPPED 		18	/* Post driver->hangup() */

#define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))

extern void tty_write_flush(struct tty_struct *);

extern struct ktermios tty_std_termios;

extern int kmsg_redirect;

extern void console_init(void);
extern int vcs_init(void);

extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode,
			      const char *routine);
extern char *tty_name(struct tty_struct *tty, char *buf);
extern void tty_wait_until_sent(struct tty_struct * tty, long timeout);
extern int tty_check_change(struct tty_struct * tty);
extern void stop_tty(struct tty_struct * tty);
extern void start_tty(struct tty_struct * tty);
extern int tty_register_ldisc(int disc, struct tty_ldisc *new_ldisc);
extern int tty_unregister_ldisc(int disc);
extern int tty_register_driver(struct tty_driver *driver);
extern int tty_unregister_driver(struct tty_driver *driver);
extern struct device *tty_register_device(struct tty_driver *driver,
					  unsigned index, struct device *dev);
extern void tty_unregister_device(struct tty_driver *driver, unsigned index);
extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
			     int buflen);
extern void tty_write_message(struct tty_struct *tty, char *msg);

extern int is_current_pgrp_orphaned(void);
extern int is_ignored(int sig);
extern int tty_signal(int sig, struct tty_struct *tty);
extern void tty_hangup(struct tty_struct * tty);
extern void tty_vhangup(struct tty_struct * tty);
extern void tty_unhangup(struct file *filp);
extern int tty_hung_up_p(struct file * filp);
extern int is_tty(struct file *filp);
extern void do_SAK(struct tty_struct *tty);
extern void __do_SAK(struct tty_struct *tty);
extern void disassociate_ctty(int priv);
extern void no_tty(void);
extern void tty_flip_buffer_push(struct tty_struct *tty);
extern speed_t tty_get_baud_rate(struct tty_struct *tty);
extern speed_t tty_termios_baud_rate(struct ktermios *termios);
extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);

extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);
extern void tty_ldisc_deref(struct tty_ldisc *);
extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *);

extern struct tty_ldisc *tty_ldisc_get(int);
extern void tty_ldisc_put(int);

extern void tty_wakeup(struct tty_struct *tty);
extern void tty_ldisc_flush(struct tty_struct *tty);

extern int tty_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
		     unsigned long arg);

extern dev_t tty_devnum(struct tty_struct *tty);
extern void proc_clear_tty(struct task_struct *p);
extern struct tty_struct *get_current_tty(void);

extern struct mutex tty_mutex;

extern void tty_write_unlock(struct tty_struct *tty);
extern int tty_write_lock(struct tty_struct *tty, int ndelay);
#define tty_is_writelocked(tty)  (mutex_is_locked(&tty->atomic_write_lock))


/* n_tty.c */
extern struct tty_ldisc tty_ldisc_N_TTY;

/* tty_audit.c */
#ifdef CONFIG_AUDIT
extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
			       size_t size);
extern void tty_audit_exit(void);
extern void tty_audit_fork(struct signal_struct *sig);
extern void tty_audit_push(struct tty_struct *tty);
extern void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid);
extern void tty_audit_opening(void);
#else
static inline void tty_audit_add_data(struct tty_struct *tty,
				      unsigned char *data, size_t size)
{
}
static inline void tty_audit_exit(void)
{
}
static inline void tty_audit_fork(struct signal_struct *sig)
{
}
static inline void tty_audit_push(struct tty_struct *tty)
{
}
static inline void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid)
{
}
static inline void tty_audit_opening(void)
{
}
#endif

/* tty_ioctl.c */
extern int n_tty_ioctl(struct tty_struct * tty, struct file * file,
		       unsigned int cmd, unsigned long arg);

/* serial.c */

extern void serial_console_init(void);
 
/* pcxx.c */

extern int pcxe_open(struct tty_struct *tty, struct file *filp);

/* printk.c */

extern void console_print(const char *);

/* vt.c */

extern int vt_ioctl(struct tty_struct *tty, struct file * file,
		    unsigned int cmd, unsigned long arg);

#endif /* __KERNEL__ */
#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_TTY_H
	2	#define _LINUX_TTY_H
	3
	4	/*
	5	* 'tty.h' defines some structures used by tty_io.c and some defines.
	6	*/
	7
1da177e4	8	#ifdef __KERNEL__
1da177e4 LT	9	#include <linux/fs.h>
	10	#include <linux/major.h>
	11	#include <linux/termios.h>
	12	#include <linux/workqueue.h>
	13	#include <linux/tty_driver.h>
	14	#include <linux/tty_ldisc.h>
70522e12	15	#include <linux/mutex.h>
1da177e4 LT	16
	17	#include <asm/system.h>
	18
	19
	20	/*
	21	* (Note: the *_driver.minor_start values 1, 64, 128, 192 are
	22	* hardcoded at present.)
	23	*/
	24	#define NR_PTYS CONFIG_LEGACY_PTY_COUNT /* Number of legacy ptys */
	25	#define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */
	26	#define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */
4564f9e5 TS	27	#define NR_LDISCS 17
	28
	29	/* line disciplines */
	30	#define N_TTY 0
	31	#define N_SLIP 1
	32	#define N_MOUSE 2
	33	#define N_PPP 3
	34	#define N_STRIP 4
	35	#define N_AX25 5
	36	#define N_X25 6 /* X.25 async */
	37	#define N_6PACK 7
	38	#define N_MASC 8 /* Reserved for Mobitex module <[email protected]> */
	39	#define N_R3964 9 /* Reserved for Simatic R3964 module */
	40	#define N_PROFIBUS_FDL 10 /* Reserved for Profibus <[email protected]> */
	41	#define N_IRDA 11 /* Linux IrDa - http://irda.sourceforge.net/ */
	42	#define N_SMSBLOCK 12 /* SMS block mode - for talking to GSM data */
	43	/* cards about SMS messages */
	44	#define N_HDLC 13 /* synchronous HDLC */
	45	#define N_SYNC_PPP 14 /* synchronous PPP */
	46	#define N_HCI 15 /* Bluetooth HCI UART */
	47	#define N_GIGASET_M101 16 /* Siemens Gigaset M101 serial DECT adapter */
1da177e4	48
1da177e4 LT	49	/*
	50	* This character is the same as _POSIX_VDISABLE: it cannot be used as
	51	* a c_cc[] character, but indicates that a particular special character
	52	* isn't in use (eg VINTR has no character etc)
	53	*/
	54	#define __DISABLED_CHAR '\0'
	55
	56	/*
	57	* This is the flip buffer used for the tty driver. The buffer is
	58	* located in the tty structure, and is used as a high speed interface
	59	* between the tty driver and the tty line discipline.
	60	*/
	61	#define TTY_FLIPBUF_SIZE 512
	62
33f0f88f AC	63	struct tty_buffer {
	64	struct tty_buffer *next;
	65	char *char_buf_ptr;
	66	unsigned char *flag_buf_ptr;
	67	int used;
	68	int size;
8977d929 PF	69	int commit;
8977d929 PF	70	int read;
33f0f88f AC	71	/* Data points here */
	72	unsigned long data[0];
	73	};
	74
	75	struct tty_bufhead {
52bad64d	76	struct delayed_work work;
1da177e4	77	struct semaphore pty_sem;
808249ce	78	spinlock_t lock;
33f0f88f AC	79	struct tty_buffer head; / Queue head */
	80	struct tty_buffer tail; / Active buffer */
	81	struct tty_buffer free; / Free queue head */
01da5fd8	82	int memory_used; /* Buffer space used excluding free queue */
1da177e4 LT	83	};
	84	/*
	85	* The pty uses char_buf and flag_buf as a contiguous buffer
	86	*/
	87	#define PTY_BUF_SIZE 4*TTY_FLIPBUF_SIZE
	88
	89	/*
	90	* When a break, frame error, or parity error happens, these codes are
	91	* stuffed into the flags buffer.
	92	*/
	93	#define TTY_NORMAL 0
	94	#define TTY_BREAK 1
	95	#define TTY_FRAME 2
	96	#define TTY_PARITY 3
	97	#define TTY_OVERRUN 4
	98
	99	#define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
	100	#define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
	101	#define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
	102	#define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
	103	#define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
	104	#define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])
	105	#define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])
	106	#define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])
	107	#define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
	108	#define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
	109	#define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
	110	#define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])
	111	#define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])
	112	#define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])
	113	#define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
	114	#define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT])
	115	#define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])
	116
	117	#define _I_FLAG(tty,f) ((tty)->termios->c_iflag & (f))
	118	#define _O_FLAG(tty,f) ((tty)->termios->c_oflag & (f))
	119	#define _C_FLAG(tty,f) ((tty)->termios->c_cflag & (f))
	120	#define _L_FLAG(tty,f) ((tty)->termios->c_lflag & (f))
	121
	122	#define I_IGNBRK(tty) _I_FLAG((tty),IGNBRK)
	123	#define I_BRKINT(tty) _I_FLAG((tty),BRKINT)
	124	#define I_IGNPAR(tty) _I_FLAG((tty),IGNPAR)
	125	#define I_PARMRK(tty) _I_FLAG((tty),PARMRK)
	126	#define I_INPCK(tty) _I_FLAG((tty),INPCK)
	127	#define I_ISTRIP(tty) _I_FLAG((tty),ISTRIP)
	128	#define I_INLCR(tty) _I_FLAG((tty),INLCR)
	129	#define I_IGNCR(tty) _I_FLAG((tty),IGNCR)
	130	#define I_ICRNL(tty) _I_FLAG((tty),ICRNL)
	131	#define I_IUCLC(tty) _I_FLAG((tty),IUCLC)
	132	#define I_IXON(tty) _I_FLAG((tty),IXON)
	133	#define I_IXANY(tty) _I_FLAG((tty),IXANY)
	134	#define I_IXOFF(tty) _I_FLAG((tty),IXOFF)
	135	#define I_IMAXBEL(tty) _I_FLAG((tty),IMAXBEL)
	136	#define I_IUTF8(tty) _I_FLAG((tty),IUTF8)
	137
	138	#define O_OPOST(tty) _O_FLAG((tty),OPOST)
	139	#define O_OLCUC(tty) _O_FLAG((tty),OLCUC)
	140	#define O_ONLCR(tty) _O_FLAG((tty),ONLCR)
	141	#define O_OCRNL(tty) _O_FLAG((tty),OCRNL)
	142	#define O_ONOCR(tty) _O_FLAG((tty),ONOCR)
	143	#define O_ONLRET(tty) _O_FLAG((tty),ONLRET)
	144	#define O_OFILL(tty) _O_FLAG((tty),OFILL)
	145	#define O_OFDEL(tty) _O_FLAG((tty),OFDEL)
	146	#define O_NLDLY(tty) _O_FLAG((tty),NLDLY)
147	#define O_CRDLY(tty) _O_FLAG((tty),CRDLY)
148	#define O_TABDLY(tty) _O_FLAG((tty),TABDLY)
149	#define O_BSDLY(tty) _O_FLAG((tty),BSDLY)
150	#define O_VTDLY(tty) _O_FLAG((tty),VTDLY)
151	#define O_FFDLY(tty) _O_FLAG((tty),FFDLY)
152
153	#define C_BAUD(tty) _C_FLAG((tty),CBAUD)
154	#define C_CSIZE(tty) _C_FLAG((tty),CSIZE)
155	#define C_CSTOPB(tty) _C_FLAG((tty),CSTOPB)
156	#define C_CREAD(tty) _C_FLAG((tty),CREAD)
157	#define C_PARENB(tty) _C_FLAG((tty),PARENB)
158	#define C_PARODD(tty) _C_FLAG((tty),PARODD)
159	#define C_HUPCL(tty) _C_FLAG((tty),HUPCL)
160	#define C_CLOCAL(tty) _C_FLAG((tty),CLOCAL)
161	#define C_CIBAUD(tty) _C_FLAG((tty),CIBAUD)
162	#define C_CRTSCTS(tty) _C_FLAG((tty),CRTSCTS)
163
164	#define L_ISIG(tty) _L_FLAG((tty),ISIG)
165	#define L_ICANON(tty) _L_FLAG((tty),ICANON)
166	#define L_XCASE(tty) _L_FLAG((tty),XCASE)
167	#define L_ECHO(tty) _L_FLAG((tty),ECHO)
168	#define L_ECHOE(tty) _L_FLAG((tty),ECHOE)
169	#define L_ECHOK(tty) _L_FLAG((tty),ECHOK)
170	#define L_ECHONL(tty) _L_FLAG((tty),ECHONL)
171	#define L_NOFLSH(tty) _L_FLAG((tty),NOFLSH)
172	#define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP)
173	#define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL)
174	#define L_ECHOPRT(tty) _L_FLAG((tty),ECHOPRT)
175	#define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE)
176	#define L_FLUSHO(tty) _L_FLAG((tty),FLUSHO)
177	#define L_PENDIN(tty) _L_FLAG((tty),PENDIN)
178	#define L_IEXTEN(tty) _L_FLAG((tty),IEXTEN)
179
180	struct device;
522ed776	181	struct signal_struct;
1da177e4 LT	182	/*
	183	* Where all of the state associated with a tty is kept while the tty
	184	* is open. Since the termios state should be kept even if the tty
	185	* has been closed --- for things like the baud rate, etc --- it is
	186	* not stored here, but rather a pointer to the real state is stored
	187	* here. Possible the winsize structure should have the same
	188	* treatment, but (1) the default 80x24 is usually right and (2) it's
	189	* most often used by a windowing system, which will set the correct
	190	* size each time the window is created or resized anyway.
	191	* - TYT, 9/14/92
	192	*/
	193	struct tty_struct {
	194	int magic;
	195	struct tty_driver *driver;
	196	int index;
	197	struct tty_ldisc ldisc;
5785c95b	198	struct mutex termios_mutex;
edc6afc5	199	struct ktermios termios, termios_locked;
1da177e4	200	char name[64];
ab521dc0 EB	201	struct pid *pgrp;
ab521dc0 EB	202	struct pid *session;
1da177e4 LT	203	unsigned long flags;
	204	int count;
	205	struct winsize winsize;
	206	unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
	207	unsigned char low_latency:1, warned:1;
	208	unsigned char ctrl_status;
33f0f88f	209	unsigned int receive_room; /* Bytes free for queue */
1da177e4 LT	210
	211	struct tty_struct *link;
	212	struct fasync_struct *fasync;
33f0f88f	213	struct tty_bufhead buf;
1da177e4 LT	214	int alt_speed; /* For magic substitution of 38400 bps */
	215	wait_queue_head_t write_wait;
	216	wait_queue_head_t read_wait;
	217	struct work_struct hangup_work;
	218	void *disc_data;
	219	void *driver_data;
	220	struct list_head tty_files;
	221
	222	#define N_TTY_BUF_SIZE 4096
	223
	224	/*
	225	* The following is data for the N_TTY line discipline. For
	226	* historical reasons, this is included in the tty structure.
	227	*/
	228	unsigned int column;
	229	unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
	230	unsigned char closing:1;
	231	unsigned short minimum_to_wake;
	232	unsigned long overrun_time;
	233	int num_overrun;
	234	unsigned long process_char_map[256/(8*sizeof(unsigned long))];
	235	char *read_buf;
	236	int read_head;
	237	int read_tail;
	238	int read_cnt;
	239	unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
	240	int canon_data;
	241	unsigned long canon_head;
	242	unsigned int canon_column;
70522e12 IM	243	struct mutex atomic_read_lock;
70522e12 IM	244	struct mutex atomic_write_lock;
1da177e4 LT	245	unsigned char *write_buf;
	246	int write_cnt;
	247	spinlock_t read_lock;
	248	/* If the tty has a pending do_SAK, queue it here - akpm */
	249	struct work_struct SAK_work;
	250	};
	251
	252	/* tty magic number */
	253	#define TTY_MAGIC 0x5401
	254
	255	/*
	256	* These bits are used in the flags field of the tty structure.
	257	*
	258	* So that interrupts won't be able to mess up the queues,
	259	* copy_to_cooked must be atomic with respect to itself, as must
	260	* tty->write. Thus, you must use the inline functions set_bit() and
	261	* clear_bit() to make things atomic.
	262	*/
	263	#define TTY_THROTTLED 0 /* Call unthrottle() at threshold min */
	264	#define TTY_IO_ERROR 1 /* Canse an I/O error (may be no ldisc too) */
	265	#define TTY_OTHER_CLOSED 2 /* Other side (if any) has closed */
	266	#define TTY_EXCLUSIVE 3 /* Exclusive open mode */
	267	#define TTY_DEBUG 4 /* Debugging */
	268	#define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */
	269	#define TTY_PUSH 6 /* n_tty private */
	270	#define TTY_CLOSING 7 /* ->close() in progress */
1da177e4 LT	271	#define TTY_LDISC 9 /* Line discipline attached */
	272	#define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */
	273	#define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */
	274	#define TTY_PTY_LOCK 16 /* pty private */
	275	#define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */
	276	#define TTY_HUPPED 18 /* Post driver->hangup() */
	277
	278	#define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
	279
	280	extern void tty_write_flush(struct tty_struct *);
	281
edc6afc5	282	extern struct ktermios tty_std_termios;
1da177e4 LT	283
	284	extern int kmsg_redirect;
	285
	286	extern void console_init(void);
	287	extern int vcs_init(void);
	288
	289	extern int tty_paranoia_check(struct tty_struct tty, struct inode inode,
	290	const char *routine);
	291	extern char tty_name(struct tty_struct tty, char *buf);
	292	extern void tty_wait_until_sent(struct tty_struct * tty, long timeout);
	293	extern int tty_check_change(struct tty_struct * tty);
	294	extern void stop_tty(struct tty_struct * tty);
	295	extern void start_tty(struct tty_struct * tty);
	296	extern int tty_register_ldisc(int disc, struct tty_ldisc *new_ldisc);
bfb07599	297	extern int tty_unregister_ldisc(int disc);
1da177e4 LT	298	extern int tty_register_driver(struct tty_driver *driver);
1da177e4 LT	299	extern int tty_unregister_driver(struct tty_driver *driver);
01107d34 GKH	300	extern struct device tty_register_device(struct tty_driver driver,
01107d34 GKH	301	unsigned index, struct device *dev);
1da177e4 LT	302	extern void tty_unregister_device(struct tty_driver *driver, unsigned index);
	303	extern int tty_read_raw_data(struct tty_struct tty, unsigned char bufp,
	304	int buflen);
	305	extern void tty_write_message(struct tty_struct tty, char msg);
	306
3e7cd6c4	307	extern int is_current_pgrp_orphaned(void);
1da177e4 LT	308	extern int is_ignored(int sig);
	309	extern int tty_signal(int sig, struct tty_struct *tty);
	310	extern void tty_hangup(struct tty_struct * tty);
	311	extern void tty_vhangup(struct tty_struct * tty);
	312	extern void tty_unhangup(struct file *filp);
	313	extern int tty_hung_up_p(struct file * filp);
522ed776	314	extern int is_tty(struct file *filp);
1da177e4	315	extern void do_SAK(struct tty_struct *tty);
8b6312f4	316	extern void __do_SAK(struct tty_struct *tty);
1da177e4	317	extern void disassociate_ctty(int priv);
98a27ba4	318	extern void no_tty(void);
1da177e4	319	extern void tty_flip_buffer_push(struct tty_struct *tty);
edc6afc5 AC	320	extern speed_t tty_get_baud_rate(struct tty_struct *tty);
	321	extern speed_t tty_termios_baud_rate(struct ktermios *termios);
	322	extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
1da177e4 LT	323
	324	extern struct tty_ldisc tty_ldisc_ref(struct tty_struct );
	325	extern void tty_ldisc_deref(struct tty_ldisc *);
	326	extern struct tty_ldisc tty_ldisc_ref_wait(struct tty_struct );
	327
	328	extern struct tty_ldisc *tty_ldisc_get(int);
	329	extern void tty_ldisc_put(int);
	330
	331	extern void tty_wakeup(struct tty_struct *tty);
	332	extern void tty_ldisc_flush(struct tty_struct *tty);
	333
07f3f05c DH	334	extern int tty_ioctl(struct inode inode, struct file file, unsigned int cmd,
	335	unsigned long arg);
	336
24ec839c PZ	337	extern dev_t tty_devnum(struct tty_struct *tty);
24ec839c PZ	338	extern void proc_clear_tty(struct task_struct *p);
24ec839c PZ	339	extern struct tty_struct *get_current_tty(void);
24ec839c PZ	340
70522e12	341	extern struct mutex tty_mutex;
1da177e4	342
9c1729db AC	343	extern void tty_write_unlock(struct tty_struct *tty);
	344	extern int tty_write_lock(struct tty_struct *tty, int ndelay);
	345	#define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock))
	346
	347
	348
1da177e4 LT	349	/* n_tty.c */
	350	extern struct tty_ldisc tty_ldisc_N_TTY;
	351
522ed776 MT	352	/* tty_audit.c */
	353	#ifdef CONFIG_AUDIT
	354	extern void tty_audit_add_data(struct tty_struct tty, unsigned char data,
	355	size_t size);
	356	extern void tty_audit_exit(void);
	357	extern void tty_audit_fork(struct signal_struct *sig);
	358	extern void tty_audit_push(struct tty_struct *tty);
	359	extern void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid);
	360	extern void tty_audit_opening(void);
	361	#else
	362	static inline void tty_audit_add_data(struct tty_struct *tty,
	363	unsigned char *data, size_t size)
	364	{
	365	}
	366	static inline void tty_audit_exit(void)
	367	{
	368	}
	369	static inline void tty_audit_fork(struct signal_struct *sig)
	370	{
	371	}
	372	static inline void tty_audit_push(struct tty_struct *tty)
	373	{
	374	}
	375	static inline void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid)
	376	{
	377	}
	378	static inline void tty_audit_opening(void)
	379	{
	380	}
	381	#endif
	382
1da177e4 LT	383	/* tty_ioctl.c */
	384	extern int n_tty_ioctl(struct tty_struct * tty, struct file * file,
	385	unsigned int cmd, unsigned long arg);
	386
	387	/* serial.c */
	388
	389	extern void serial_console_init(void);
	390
	391	/* pcxx.c */
	392
	393	extern int pcxe_open(struct tty_struct tty, struct file filp);
	394
	395	/* printk.c */
	396
	397	extern void console_print(const char *);
	398
	399	/* vt.c */
	400
	401	extern int vt_ioctl(struct tty_struct tty, struct file file,
	402	unsigned int cmd, unsigned long arg);
	403
1da177e4 LT	404	#endif /* __KERNEL__ */
1da177e4 LT	405	#endif