Line data Source code
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 :
8 : #ifdef __KERNEL__
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>
15 : #include <linux/mutex.h>
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_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */
25 : #define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */
26 : #define NR_LDISCS 20
27 :
28 : /* line disciplines */
29 : #define N_TTY 0
30 : #define N_SLIP 1
31 : #define N_MOUSE 2
32 : #define N_PPP 3
33 : #define N_STRIP 4
34 : #define N_AX25 5
35 : #define N_X25 6 /* X.25 async */
36 : #define N_6PACK 7
37 : #define N_MASC 8 /* Reserved for Mobitex module <kaz@cafe.net> */
38 : #define N_R3964 9 /* Reserved for Simatic R3964 module */
39 : #define N_PROFIBUS_FDL 10 /* Reserved for Profibus */
40 : #define N_IRDA 11 /* Linux IrDa - http://irda.sourceforge.net/ */
41 : #define N_SMSBLOCK 12 /* SMS block mode - for talking to GSM data */
42 : /* cards about SMS messages */
43 : #define N_HDLC 13 /* synchronous HDLC */
44 : #define N_SYNC_PPP 14 /* synchronous PPP */
45 : #define N_HCI 15 /* Bluetooth HCI UART */
46 : #define N_GIGASET_M101 16 /* Siemens Gigaset M101 serial DECT adapter */
47 : #define N_SLCAN 17 /* Serial / USB serial CAN Adaptors */
48 : #define N_PPS 18 /* Pulse per Second */
49 :
50 : #define N_V253 19 /* Codec control over voice modem */
51 :
52 : /*
53 : * This character is the same as _POSIX_VDISABLE: it cannot be used as
54 : * a c_cc[] character, but indicates that a particular special character
55 : * isn't in use (eg VINTR has no character etc)
56 : */
57 : #define __DISABLED_CHAR '\0'
58 :
59 : struct tty_buffer {
60 : struct tty_buffer *next;
61 : char *char_buf_ptr;
62 : unsigned char *flag_buf_ptr;
63 : int used;
64 : int size;
65 : int commit;
66 : int read;
67 : /* Data points here */
68 : unsigned long data[0];
69 : };
70 1 :
71 : /*
72 : * We default to dicing tty buffer allocations to this many characters
73 : * in order to avoid multiple page allocations. We know the size of
74 : * tty_buffer itself but it must also be taken into account that the
75 : * the buffer is 256 byte aligned. See tty_buffer_find for the allocation
76 : * logic this must match
77 : */
78 :
79 : #define TTY_BUFFER_PAGE (((PAGE_SIZE - sizeof(struct tty_buffer)) / 2) & ~0xFF)
80 :
81 :
82 : struct tty_bufhead {
83 : struct delayed_work work;
84 : spinlock_t lock;
85 : struct tty_buffer *head; /* Queue head */
86 : struct tty_buffer *tail; /* Active buffer */
87 : struct tty_buffer *free; /* Free queue head */
88 : int memory_used; /* Buffer space used excluding
89 : free queue */
90 1 : };
91 1 : /*
92 : * When a break, frame error, or parity error happens, these codes are
93 : * stuffed into the flags buffer.
94 : */
95 : #define TTY_NORMAL 0
96 : #define TTY_BREAK 1
97 : #define TTY_FRAME 2
98 : #define TTY_PARITY 3
99 : #define TTY_OVERRUN 4
100 :
101 : #define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
102 : #define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
103 : #define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
104 : #define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
105 : #define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
106 : #define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])
107 : #define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])
108 : #define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])
109 : #define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
110 : #define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
111 : #define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
112 : #define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])
113 : #define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])
114 : #define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])
115 : #define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
116 : #define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT])
117 : #define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])
118 :
119 : #define _I_FLAG(tty, f) ((tty)->termios->c_iflag & (f))
120 : #define _O_FLAG(tty, f) ((tty)->termios->c_oflag & (f))
121 : #define _C_FLAG(tty, f) ((tty)->termios->c_cflag & (f))
122 : #define _L_FLAG(tty, f) ((tty)->termios->c_lflag & (f))
123 :
124 : #define I_IGNBRK(tty) _I_FLAG((tty), IGNBRK)
125 : #define I_BRKINT(tty) _I_FLAG((tty), BRKINT)
126 : #define I_IGNPAR(tty) _I_FLAG((tty), IGNPAR)
127 : #define I_PARMRK(tty) _I_FLAG((tty), PARMRK)
128 : #define I_INPCK(tty) _I_FLAG((tty), INPCK)
129 : #define I_ISTRIP(tty) _I_FLAG((tty), ISTRIP)
130 : #define I_INLCR(tty) _I_FLAG((tty), INLCR)
131 : #define I_IGNCR(tty) _I_FLAG((tty), IGNCR)
132 : #define I_ICRNL(tty) _I_FLAG((tty), ICRNL)
133 : #define I_IUCLC(tty) _I_FLAG((tty), IUCLC)
134 : #define I_IXON(tty) _I_FLAG((tty), IXON)
135 : #define I_IXANY(tty) _I_FLAG((tty), IXANY)
136 : #define I_IXOFF(tty) _I_FLAG((tty), IXOFF)
137 : #define I_IMAXBEL(tty) _I_FLAG((tty), IMAXBEL)
138 : #define I_IUTF8(tty) _I_FLAG((tty), IUTF8)
139 :
140 : #define O_OPOST(tty) _O_FLAG((tty), OPOST)
141 : #define O_OLCUC(tty) _O_FLAG((tty), OLCUC)
142 : #define O_ONLCR(tty) _O_FLAG((tty), ONLCR)
143 : #define O_OCRNL(tty) _O_FLAG((tty), OCRNL)
144 : #define O_ONOCR(tty) _O_FLAG((tty), ONOCR)
145 : #define O_ONLRET(tty) _O_FLAG((tty), ONLRET)
146 : #define O_OFILL(tty) _O_FLAG((tty), OFILL)
147 : #define O_OFDEL(tty) _O_FLAG((tty), OFDEL)
148 : #define O_NLDLY(tty) _O_FLAG((tty), NLDLY)
149 : #define O_CRDLY(tty) _O_FLAG((tty), CRDLY)
150 : #define O_TABDLY(tty) _O_FLAG((tty), TABDLY)
151 : #define O_BSDLY(tty) _O_FLAG((tty), BSDLY)
152 : #define O_VTDLY(tty) _O_FLAG((tty), VTDLY)
153 : #define O_FFDLY(tty) _O_FLAG((tty), FFDLY)
154 :
155 : #define C_BAUD(tty) _C_FLAG((tty), CBAUD)
156 : #define C_CSIZE(tty) _C_FLAG((tty), CSIZE)
157 : #define C_CSTOPB(tty) _C_FLAG((tty), CSTOPB)
158 : #define C_CREAD(tty) _C_FLAG((tty), CREAD)
159 : #define C_PARENB(tty) _C_FLAG((tty), PARENB)
160 : #define C_PARODD(tty) _C_FLAG((tty), PARODD)
161 : #define C_HUPCL(tty) _C_FLAG((tty), HUPCL)
162 : #define C_CLOCAL(tty) _C_FLAG((tty), CLOCAL)
163 : #define C_CIBAUD(tty) _C_FLAG((tty), CIBAUD)
164 : #define C_CRTSCTS(tty) _C_FLAG((tty), CRTSCTS)
165 :
166 : #define L_ISIG(tty) _L_FLAG((tty), ISIG)
167 : #define L_ICANON(tty) _L_FLAG((tty), ICANON)
168 : #define L_XCASE(tty) _L_FLAG((tty), XCASE)
169 : #define L_ECHO(tty) _L_FLAG((tty), ECHO)
170 : #define L_ECHOE(tty) _L_FLAG((tty), ECHOE)
171 : #define L_ECHOK(tty) _L_FLAG((tty), ECHOK)
172 : #define L_ECHONL(tty) _L_FLAG((tty), ECHONL)
173 : #define L_NOFLSH(tty) _L_FLAG((tty), NOFLSH)
174 : #define L_TOSTOP(tty) _L_FLAG((tty), TOSTOP)
175 : #define L_ECHOCTL(tty) _L_FLAG((tty), ECHOCTL)
176 : #define L_ECHOPRT(tty) _L_FLAG((tty), ECHOPRT)
177 : #define L_ECHOKE(tty) _L_FLAG((tty), ECHOKE)
178 : #define L_FLUSHO(tty) _L_FLAG((tty), FLUSHO)
179 : #define L_PENDIN(tty) _L_FLAG((tty), PENDIN)
180 : #define L_IEXTEN(tty) _L_FLAG((tty), IEXTEN)
181 :
182 : struct device;
183 : struct signal_struct;
184 :
185 : /*
186 : * Port level information. Each device keeps its own port level information
187 : * so provide a common structure for those ports wanting to use common support
188 : * routines.
189 : *
190 : * The tty port has a different lifetime to the tty so must be kept apart.
191 : * In addition be careful as tty -> port mappings are valid for the life
192 : * of the tty object but in many cases port -> tty mappings are valid only
193 : * until a hangup so don't use the wrong path.
194 : */
195 :
196 : struct tty_port;
197 :
198 : struct tty_port_operations {
199 : /* Return 1 if the carrier is raised */
200 : int (*carrier_raised)(struct tty_port *port);
201 : /* Control the DTR line */
202 : void (*dtr_rts)(struct tty_port *port, int raise);
203 : /* Called when the last close completes or a hangup finishes
204 : IFF the port was initialized. Do not use to free resources. Called
205 : under the port mutex to serialize against activate/shutdowns */
206 : void (*shutdown)(struct tty_port *port);
207 : void (*drop)(struct tty_port *port);
208 : /* Called under the port mutex from tty_port_open, serialized using
209 : the port mutex */
210 : /* FIXME: long term getting the tty argument *out* of this would be
211 : good for consoles */
212 : int (*activate)(struct tty_port *port, struct tty_struct *tty);
213 : /* Called on the final put of a port */
214 : void (*destruct)(struct tty_port *port);
215 : };
216 1 :
217 : struct tty_port {
218 : struct tty_struct *tty; /* Back pointer */
219 : const struct tty_port_operations *ops; /* Port operations */
220 : spinlock_t lock; /* Lock protecting tty field */
221 : int blocked_open; /* Waiting to open */
222 : int count; /* Usage count */
223 : wait_queue_head_t open_wait; /* Open waiters */
224 : wait_queue_head_t close_wait; /* Close waiters */
225 : wait_queue_head_t delta_msr_wait; /* Modem status change */
226 : unsigned long flags; /* TTY flags ASY_*/
227 : struct mutex mutex; /* Locking */
228 : struct mutex buf_mutex; /* Buffer alloc lock */
229 : unsigned char *xmit_buf; /* Optional buffer */
230 : unsigned int close_delay; /* Close port delay */
231 : unsigned int closing_wait; /* Delay for output */
232 : int drain_delay; /* Set to zero if no pure time
233 : based drain is needed else
234 : set to size of fifo */
235 : struct kref kref; /* Ref counter */
236 : };
237 1 :
238 : /*
239 : * Where all of the state associated with a tty is kept while the tty
240 : * is open. Since the termios state should be kept even if the tty
241 : * has been closed --- for things like the baud rate, etc --- it is
242 : * not stored here, but rather a pointer to the real state is stored
243 : * here. Possible the winsize structure should have the same
244 : * treatment, but (1) the default 80x24 is usually right and (2) it's
245 : * most often used by a windowing system, which will set the correct
246 : * size each time the window is created or resized anyway.
247 : * - TYT, 9/14/92
248 : */
249 :
250 : struct tty_operations;
251 :
252 : struct tty_struct {
253 : int magic;
254 : struct kref kref;
255 : struct tty_driver *driver;
256 : const struct tty_operations *ops;
257 : int index;
258 :
259 : /* Protects ldisc changes: Lock tty not pty */
260 : struct mutex ldisc_mutex;
261 : struct tty_ldisc *ldisc;
262 :
263 : struct mutex termios_mutex;
264 : spinlock_t ctrl_lock;
265 : /* Termios values are protected by the termios mutex */
266 : struct ktermios *termios, *termios_locked;
267 : struct termiox *termiox; /* May be NULL for unsupported */
268 : char name[64];
269 : struct pid *pgrp; /* Protected by ctrl lock */
270 : struct pid *session;
271 : unsigned long flags;
272 : int count;
273 : struct winsize winsize; /* termios mutex */
274 : unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
275 : unsigned char low_latency:1, warned:1;
276 : unsigned char ctrl_status; /* ctrl_lock */
277 : unsigned int receive_room; /* Bytes free for queue */
278 :
279 : struct tty_struct *link;
280 : struct fasync_struct *fasync;
281 : struct tty_bufhead buf; /* Locked internally */
282 : int alt_speed; /* For magic substitution of 38400 bps */
283 : wait_queue_head_t write_wait;
284 : wait_queue_head_t read_wait;
285 : struct work_struct hangup_work;
286 : void *disc_data;
287 : void *driver_data;
288 : struct list_head tty_files;
289 :
290 : #define N_TTY_BUF_SIZE 4096
291 :
292 : /*
293 : * The following is data for the N_TTY line discipline. For
294 : * historical reasons, this is included in the tty structure.
295 : * Mostly locked by the BKL.
296 : */
297 : unsigned int column;
298 : unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
299 : unsigned char closing:1;
300 : unsigned char echo_overrun:1;
301 : unsigned short minimum_to_wake;
302 : unsigned long overrun_time;
303 : int num_overrun;
304 : unsigned long process_char_map[256/(8*sizeof(unsigned long))];
305 : char *read_buf;
306 : int read_head;
307 : int read_tail;
308 : int read_cnt;
309 : unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
310 : unsigned char *echo_buf;
311 : unsigned int echo_pos;
312 : unsigned int echo_cnt;
313 : int canon_data;
314 : unsigned long canon_head;
315 : unsigned int canon_column;
316 : struct mutex atomic_read_lock;
317 : struct mutex atomic_write_lock;
318 : struct mutex output_lock;
319 : struct mutex echo_lock;
320 : unsigned char *write_buf;
321 : int write_cnt;
322 : spinlock_t read_lock;
323 : /* If the tty has a pending do_SAK, queue it here - akpm */
324 : struct work_struct SAK_work;
325 : struct tty_port *port;
326 : };
327 :
328 : /* tty magic number */
329 : #define TTY_MAGIC 0x5401
330 :
331 : /*
332 : * These bits are used in the flags field of the tty structure.
333 : *
334 : * So that interrupts won't be able to mess up the queues,
335 : * copy_to_cooked must be atomic with respect to itself, as must
336 : * tty->write. Thus, you must use the inline functions set_bit() and
337 : * clear_bit() to make things atomic.
338 : */
339 : #define TTY_THROTTLED 0 /* Call unthrottle() at threshold min */
340 : #define TTY_IO_ERROR 1 /* Cause an I/O error (may be no ldisc too) */
341 : #define TTY_OTHER_CLOSED 2 /* Other side (if any) has closed */
342 : #define TTY_EXCLUSIVE 3 /* Exclusive open mode */
343 : #define TTY_DEBUG 4 /* Debugging */
344 : #define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */
345 : #define TTY_PUSH 6 /* n_tty private */
346 : #define TTY_CLOSING 7 /* ->close() in progress */
347 : #define TTY_LDISC 9 /* Line discipline attached */
348 : #define TTY_LDISC_CHANGING 10 /* Line discipline changing */
349 : #define TTY_LDISC_OPEN 11 /* Line discipline is open */
350 : #define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */
351 : #define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */
352 : #define TTY_PTY_LOCK 16 /* pty private */
353 : #define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */
354 : #define TTY_HUPPED 18 /* Post driver->hangup() */
355 : #define TTY_FLUSHING 19 /* Flushing to ldisc in progress */
356 : #define TTY_FLUSHPENDING 20 /* Queued buffer flush pending */
357 :
358 : #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
359 :
360 : extern void tty_write_flush(struct tty_struct *);
361 :
362 : extern struct ktermios tty_std_termios;
363 :
364 : extern void console_init(void);
365 : extern int vcs_init(void);
366 :
367 : extern struct class *tty_class;
368 :
369 : /**
370 : * tty_kref_get - get a tty reference
371 : * @tty: tty device
372 : *
373 : * Return a new reference to a tty object. The caller must hold
374 : * sufficient locks/counts to ensure that their existing reference cannot
375 : * go away
376 : */
377 :
378 : static inline struct tty_struct *tty_kref_get(struct tty_struct *tty)
379 : {
380 : if (tty)
381 : kref_get(&tty->kref);
382 : return tty;
383 : }
384 : extern void tty_kref_put(struct tty_struct *tty);
385 :
386 : extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode,
387 : const char *routine);
388 : extern char *tty_name(struct tty_struct *tty, char *buf);
389 : extern void tty_wait_until_sent(struct tty_struct *tty, long timeout);
390 : extern int tty_check_change(struct tty_struct *tty);
391 : extern void stop_tty(struct tty_struct *tty);
392 : extern void start_tty(struct tty_struct *tty);
393 : extern int tty_register_driver(struct tty_driver *driver);
394 : extern int tty_unregister_driver(struct tty_driver *driver);
395 : extern struct device *tty_register_device(struct tty_driver *driver,
396 : unsigned index, struct device *dev);
397 : extern void tty_unregister_device(struct tty_driver *driver, unsigned index);
398 : extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
399 : int buflen);
400 : extern void tty_write_message(struct tty_struct *tty, char *msg);
401 : extern int tty_put_char(struct tty_struct *tty, unsigned char c);
402 : extern int tty_chars_in_buffer(struct tty_struct *tty);
403 : extern int tty_write_room(struct tty_struct *tty);
404 : extern void tty_driver_flush_buffer(struct tty_struct *tty);
405 : extern void tty_throttle(struct tty_struct *tty);
406 : extern void tty_unthrottle(struct tty_struct *tty);
407 : extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws);
408 : extern void tty_shutdown(struct tty_struct *tty);
409 : extern void tty_free_termios(struct tty_struct *tty);
410 : extern int is_current_pgrp_orphaned(void);
411 : extern struct pid *tty_get_pgrp(struct tty_struct *tty);
412 : extern int is_ignored(int sig);
413 : extern int tty_signal(int sig, struct tty_struct *tty);
414 : extern void tty_hangup(struct tty_struct *tty);
415 : extern void tty_vhangup(struct tty_struct *tty);
416 : extern void tty_vhangup_self(void);
417 : extern void tty_unhangup(struct file *filp);
418 : extern int tty_hung_up_p(struct file *filp);
419 : extern void do_SAK(struct tty_struct *tty);
420 : extern void __do_SAK(struct tty_struct *tty);
421 : extern void disassociate_ctty(int priv);
422 : extern void no_tty(void);
423 : extern void tty_flip_buffer_push(struct tty_struct *tty);
424 : extern void tty_flush_to_ldisc(struct tty_struct *tty);
425 : extern void tty_buffer_free_all(struct tty_struct *tty);
426 : extern void tty_buffer_flush(struct tty_struct *tty);
427 : extern void tty_buffer_init(struct tty_struct *tty);
428 : extern speed_t tty_get_baud_rate(struct tty_struct *tty);
429 : extern speed_t tty_termios_baud_rate(struct ktermios *termios);
430 : extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
431 : extern void tty_termios_encode_baud_rate(struct ktermios *termios,
432 : speed_t ibaud, speed_t obaud);
433 : extern void tty_encode_baud_rate(struct tty_struct *tty,
434 : speed_t ibaud, speed_t obaud);
435 : extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old);
436 : extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b);
437 :
438 : extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);
439 : extern void tty_ldisc_deref(struct tty_ldisc *);
440 : extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *);
441 : extern void tty_ldisc_hangup(struct tty_struct *tty);
442 : extern const struct file_operations tty_ldiscs_proc_fops;
443 :
444 : extern void tty_wakeup(struct tty_struct *tty);
445 : extern void tty_ldisc_flush(struct tty_struct *tty);
446 :
447 : extern long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
448 : extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file,
449 : unsigned int cmd, unsigned long arg);
450 : extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg);
451 : extern dev_t tty_devnum(struct tty_struct *tty);
452 : extern void proc_clear_tty(struct task_struct *p);
453 : extern struct tty_struct *get_current_tty(void);
454 : extern void tty_default_fops(struct file_operations *fops);
455 : extern struct tty_struct *alloc_tty_struct(void);
456 : extern void free_tty_struct(struct tty_struct *tty);
457 : extern void initialize_tty_struct(struct tty_struct *tty,
458 : struct tty_driver *driver, int idx);
459 : extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx,
460 : int first_ok);
461 : extern int tty_release(struct inode *inode, struct file *filp);
462 : extern int tty_init_termios(struct tty_struct *tty);
463 :
464 : extern struct tty_struct *tty_pair_get_tty(struct tty_struct *tty);
465 : extern struct tty_struct *tty_pair_get_pty(struct tty_struct *tty);
466 :
467 : extern struct mutex tty_mutex;
468 :
469 : extern void tty_write_unlock(struct tty_struct *tty);
470 : extern int tty_write_lock(struct tty_struct *tty, int ndelay);
471 : #define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock))
472 :
473 : extern void tty_port_init(struct tty_port *port);
474 : extern int tty_port_alloc_xmit_buf(struct tty_port *port);
475 : extern void tty_port_free_xmit_buf(struct tty_port *port);
476 : extern void tty_port_put(struct tty_port *port);
477 :
478 : static inline struct tty_port *tty_port_get(struct tty_port *port)
479 : {
480 : if (port)
481 : kref_get(&port->kref);
482 : return port;
483 : }
484 :
485 : extern struct tty_struct *tty_port_tty_get(struct tty_port *port);
486 : extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty);
487 : extern int tty_port_carrier_raised(struct tty_port *port);
488 : extern void tty_port_raise_dtr_rts(struct tty_port *port);
489 : extern void tty_port_lower_dtr_rts(struct tty_port *port);
490 : extern void tty_port_hangup(struct tty_port *port);
491 : extern int tty_port_block_til_ready(struct tty_port *port,
492 : struct tty_struct *tty, struct file *filp);
493 : extern int tty_port_close_start(struct tty_port *port,
494 : struct tty_struct *tty, struct file *filp);
495 : extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty);
496 : extern void tty_port_close(struct tty_port *port,
497 : struct tty_struct *tty, struct file *filp);
498 : extern int tty_port_open(struct tty_port *port,
499 : struct tty_struct *tty, struct file *filp);
500 : static inline int tty_port_users(struct tty_port *port)
501 : {
502 : return port->count + port->blocked_open;
503 : }
504 :
505 : extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc);
506 : extern int tty_unregister_ldisc(int disc);
507 : extern int tty_set_ldisc(struct tty_struct *tty, int ldisc);
508 : extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty);
509 : extern void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty);
510 : extern void tty_ldisc_init(struct tty_struct *tty);
511 : extern void tty_ldisc_begin(void);
512 : /* This last one is just for the tty layer internals and shouldn't be used elsewhere */
513 : extern void tty_ldisc_enable(struct tty_struct *tty);
514 :
515 :
516 : /* n_tty.c */
517 : extern struct tty_ldisc_ops tty_ldisc_N_TTY;
518 :
519 : /* tty_audit.c */
520 : #ifdef CONFIG_AUDIT
521 : extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
522 : size_t size);
523 : extern void tty_audit_exit(void);
524 : extern void tty_audit_fork(struct signal_struct *sig);
525 : extern void tty_audit_tiocsti(struct tty_struct *tty, char ch);
526 : extern void tty_audit_push(struct tty_struct *tty);
527 : extern void tty_audit_push_task(struct task_struct *tsk,
528 : uid_t loginuid, u32 sessionid);
529 : #else
530 : static inline void tty_audit_add_data(struct tty_struct *tty,
531 : unsigned char *data, size_t size)
532 : {
533 : }
534 : static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch)
535 : {
536 : }
537 : static inline void tty_audit_exit(void)
538 : {
539 : }
540 : static inline void tty_audit_fork(struct signal_struct *sig)
541 : {
542 : }
543 : static inline void tty_audit_push(struct tty_struct *tty)
544 : {
545 : }
546 : static inline void tty_audit_push_task(struct task_struct *tsk,
547 : uid_t loginuid, u32 sessionid)
548 : {
549 : }
550 : #endif
551 :
552 : /* tty_ioctl.c */
553 : extern int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
554 : unsigned int cmd, unsigned long arg);
555 :
556 : /* serial.c */
557 :
558 : extern void serial_console_init(void);
559 :
560 : /* pcxx.c */
561 :
562 : extern int pcxe_open(struct tty_struct *tty, struct file *filp);
563 :
564 : /* vt.c */
565 :
566 : extern int vt_ioctl(struct tty_struct *tty, struct file *file,
567 : unsigned int cmd, unsigned long arg);
568 :
569 : extern long vt_compat_ioctl(struct tty_struct *tty, struct file * file,
570 : unsigned int cmd, unsigned long arg);
571 :
572 : #endif /* __KERNEL__ */
573 : #endif
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