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