tty.h revision e92166517e3ca9bfb416f91e69cf0373b55b6ede
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 59struct 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 71struct 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 171struct device; 172struct 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 185struct tty_port; 186 187struct 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 */ 194 void (*shutdown)(struct tty_port *port); 195 void (*drop)(struct tty_port *port); 196}; 197 198struct tty_port { 199 struct tty_struct *tty; /* Back pointer */ 200 const struct tty_port_operations *ops; /* Port operations */ 201 spinlock_t lock; /* Lock protecting tty field */ 202 int blocked_open; /* Waiting to open */ 203 int count; /* Usage count */ 204 wait_queue_head_t open_wait; /* Open waiters */ 205 wait_queue_head_t close_wait; /* Close waiters */ 206 wait_queue_head_t delta_msr_wait; /* Modem status change */ 207 unsigned long flags; /* TTY flags ASY_*/ 208 struct mutex mutex; /* Locking */ 209 unsigned char *xmit_buf; /* Optional buffer */ 210 unsigned int close_delay; /* Close port delay */ 211 unsigned int closing_wait; /* Delay for output */ 212 int drain_delay; /* Set to zero if no pure time 213 based drain is needed else 214 set to size of fifo */ 215}; 216 217/* 218 * Where all of the state associated with a tty is kept while the tty 219 * is open. Since the termios state should be kept even if the tty 220 * has been closed --- for things like the baud rate, etc --- it is 221 * not stored here, but rather a pointer to the real state is stored 222 * here. Possible the winsize structure should have the same 223 * treatment, but (1) the default 80x24 is usually right and (2) it's 224 * most often used by a windowing system, which will set the correct 225 * size each time the window is created or resized anyway. 226 * - TYT, 9/14/92 227 */ 228 229struct tty_operations; 230 231struct tty_struct { 232 int magic; 233 struct kref kref; 234 struct tty_driver *driver; 235 const struct tty_operations *ops; 236 int index; 237 238 /* Protects ldisc changes: Lock tty not pty */ 239 struct mutex ldisc_mutex; 240 struct tty_ldisc *ldisc; 241 242 struct mutex termios_mutex; 243 spinlock_t ctrl_lock; 244 /* Termios values are protected by the termios mutex */ 245 struct ktermios *termios, *termios_locked; 246 struct termiox *termiox; /* May be NULL for unsupported */ 247 char name[64]; 248 struct pid *pgrp; /* Protected by ctrl lock */ 249 struct pid *session; 250 unsigned long flags; 251 int count; 252 struct winsize winsize; /* termios mutex */ 253 unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1; 254 unsigned char low_latency:1, warned:1; 255 unsigned char ctrl_status; /* ctrl_lock */ 256 unsigned int receive_room; /* Bytes free for queue */ 257 258 struct tty_struct *link; 259 struct fasync_struct *fasync; 260 struct tty_bufhead buf; /* Locked internally */ 261 int alt_speed; /* For magic substitution of 38400 bps */ 262 wait_queue_head_t write_wait; 263 wait_queue_head_t read_wait; 264 struct work_struct hangup_work; 265 void *disc_data; 266 void *driver_data; 267 struct list_head tty_files; 268 269#define N_TTY_BUF_SIZE 4096 270 271 /* 272 * The following is data for the N_TTY line discipline. For 273 * historical reasons, this is included in the tty structure. 274 * Mostly locked by the BKL. 275 */ 276 unsigned int column; 277 unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1; 278 unsigned char closing:1; 279 unsigned char echo_overrun:1; 280 unsigned short minimum_to_wake; 281 unsigned long overrun_time; 282 int num_overrun; 283 unsigned long process_char_map[256/(8*sizeof(unsigned long))]; 284 char *read_buf; 285 int read_head; 286 int read_tail; 287 int read_cnt; 288 unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))]; 289 unsigned char *echo_buf; 290 unsigned int echo_pos; 291 unsigned int echo_cnt; 292 int canon_data; 293 unsigned long canon_head; 294 unsigned int canon_column; 295 struct mutex atomic_read_lock; 296 struct mutex atomic_write_lock; 297 struct mutex output_lock; 298 struct mutex echo_lock; 299 unsigned char *write_buf; 300 int write_cnt; 301 spinlock_t read_lock; 302 /* If the tty has a pending do_SAK, queue it here - akpm */ 303 struct work_struct SAK_work; 304 struct tty_port *port; 305}; 306 307/* tty magic number */ 308#define TTY_MAGIC 0x5401 309 310/* 311 * These bits are used in the flags field of the tty structure. 312 * 313 * So that interrupts won't be able to mess up the queues, 314 * copy_to_cooked must be atomic with respect to itself, as must 315 * tty->write. Thus, you must use the inline functions set_bit() and 316 * clear_bit() to make things atomic. 317 */ 318#define TTY_THROTTLED 0 /* Call unthrottle() at threshold min */ 319#define TTY_IO_ERROR 1 /* Cause an I/O error (may be no ldisc too) */ 320#define TTY_OTHER_CLOSED 2 /* Other side (if any) has closed */ 321#define TTY_EXCLUSIVE 3 /* Exclusive open mode */ 322#define TTY_DEBUG 4 /* Debugging */ 323#define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */ 324#define TTY_PUSH 6 /* n_tty private */ 325#define TTY_CLOSING 7 /* ->close() in progress */ 326#define TTY_LDISC 9 /* Line discipline attached */ 327#define TTY_LDISC_CHANGING 10 /* Line discipline changing */ 328#define TTY_LDISC_OPEN 11 /* Line discipline is open */ 329#define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */ 330#define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */ 331#define TTY_PTY_LOCK 16 /* pty private */ 332#define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */ 333#define TTY_HUPPED 18 /* Post driver->hangup() */ 334#define TTY_FLUSHING 19 /* Flushing to ldisc in progress */ 335#define TTY_FLUSHPENDING 20 /* Queued buffer flush pending */ 336 337#define TTY_WRITE_FLUSH(tty) tty_write_flush((tty)) 338 339extern void tty_write_flush(struct tty_struct *); 340 341extern struct ktermios tty_std_termios; 342 343extern int kmsg_redirect; 344 345extern void console_init(void); 346extern int vcs_init(void); 347 348extern struct class *tty_class; 349 350/** 351 * tty_kref_get - get a tty reference 352 * @tty: tty device 353 * 354 * Return a new reference to a tty object. The caller must hold 355 * sufficient locks/counts to ensure that their existing reference cannot 356 * go away 357 */ 358 359static inline struct tty_struct *tty_kref_get(struct tty_struct *tty) 360{ 361 if (tty) 362 kref_get(&tty->kref); 363 return tty; 364} 365extern void tty_kref_put(struct tty_struct *tty); 366 367extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode, 368 const char *routine); 369extern char *tty_name(struct tty_struct *tty, char *buf); 370extern void tty_wait_until_sent(struct tty_struct *tty, long timeout); 371extern int tty_check_change(struct tty_struct *tty); 372extern void stop_tty(struct tty_struct *tty); 373extern void start_tty(struct tty_struct *tty); 374extern int tty_register_driver(struct tty_driver *driver); 375extern int tty_unregister_driver(struct tty_driver *driver); 376extern struct device *tty_register_device(struct tty_driver *driver, 377 unsigned index, struct device *dev); 378extern void tty_unregister_device(struct tty_driver *driver, unsigned index); 379extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp, 380 int buflen); 381extern void tty_write_message(struct tty_struct *tty, char *msg); 382extern int tty_put_char(struct tty_struct *tty, unsigned char c); 383extern int tty_chars_in_buffer(struct tty_struct *tty); 384extern int tty_write_room(struct tty_struct *tty); 385extern void tty_driver_flush_buffer(struct tty_struct *tty); 386extern void tty_throttle(struct tty_struct *tty); 387extern void tty_unthrottle(struct tty_struct *tty); 388extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws); 389extern void tty_shutdown(struct tty_struct *tty); 390extern void tty_free_termios(struct tty_struct *tty); 391extern int is_current_pgrp_orphaned(void); 392extern struct pid *tty_get_pgrp(struct tty_struct *tty); 393extern int is_ignored(int sig); 394extern int tty_signal(int sig, struct tty_struct *tty); 395extern void tty_hangup(struct tty_struct *tty); 396extern void tty_vhangup(struct tty_struct *tty); 397extern void tty_vhangup_self(void); 398extern void tty_unhangup(struct file *filp); 399extern int tty_hung_up_p(struct file *filp); 400extern void do_SAK(struct tty_struct *tty); 401extern void __do_SAK(struct tty_struct *tty); 402extern void disassociate_ctty(int priv); 403extern void no_tty(void); 404extern void tty_flip_buffer_push(struct tty_struct *tty); 405extern void tty_flush_to_ldisc(struct tty_struct *tty); 406extern void tty_buffer_free_all(struct tty_struct *tty); 407extern void tty_buffer_flush(struct tty_struct *tty); 408extern void tty_buffer_init(struct tty_struct *tty); 409extern speed_t tty_get_baud_rate(struct tty_struct *tty); 410extern speed_t tty_termios_baud_rate(struct ktermios *termios); 411extern speed_t tty_termios_input_baud_rate(struct ktermios *termios); 412extern void tty_termios_encode_baud_rate(struct ktermios *termios, 413 speed_t ibaud, speed_t obaud); 414extern void tty_encode_baud_rate(struct tty_struct *tty, 415 speed_t ibaud, speed_t obaud); 416extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old); 417extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b); 418 419extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *); 420extern void tty_ldisc_deref(struct tty_ldisc *); 421extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *); 422extern void tty_ldisc_hangup(struct tty_struct *tty); 423extern const struct file_operations tty_ldiscs_proc_fops; 424 425extern void tty_wakeup(struct tty_struct *tty); 426extern void tty_ldisc_flush(struct tty_struct *tty); 427 428extern long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 429extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file, 430 unsigned int cmd, unsigned long arg); 431extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg); 432extern dev_t tty_devnum(struct tty_struct *tty); 433extern void proc_clear_tty(struct task_struct *p); 434extern struct tty_struct *get_current_tty(void); 435extern void tty_default_fops(struct file_operations *fops); 436extern struct tty_struct *alloc_tty_struct(void); 437extern void free_tty_struct(struct tty_struct *tty); 438extern void initialize_tty_struct(struct tty_struct *tty, 439 struct tty_driver *driver, int idx); 440extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx, 441 int first_ok); 442extern void tty_release_dev(struct file *filp); 443extern int tty_init_termios(struct tty_struct *tty); 444 445extern struct tty_struct *tty_pair_get_tty(struct tty_struct *tty); 446extern struct tty_struct *tty_pair_get_pty(struct tty_struct *tty); 447 448extern struct mutex tty_mutex; 449 450extern void tty_write_unlock(struct tty_struct *tty); 451extern int tty_write_lock(struct tty_struct *tty, int ndelay); 452#define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock)) 453 454extern void tty_port_init(struct tty_port *port); 455extern int tty_port_alloc_xmit_buf(struct tty_port *port); 456extern void tty_port_free_xmit_buf(struct tty_port *port); 457extern struct tty_struct *tty_port_tty_get(struct tty_port *port); 458extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty); 459extern int tty_port_carrier_raised(struct tty_port *port); 460extern void tty_port_raise_dtr_rts(struct tty_port *port); 461extern void tty_port_lower_dtr_rts(struct tty_port *port); 462extern void tty_port_hangup(struct tty_port *port); 463extern int tty_port_block_til_ready(struct tty_port *port, 464 struct tty_struct *tty, struct file *filp); 465extern int tty_port_close_start(struct tty_port *port, 466 struct tty_struct *tty, struct file *filp); 467extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty); 468extern void tty_port_close(struct tty_port *port, 469 struct tty_struct *tty, struct file *filp); 470extern inline int tty_port_users(struct tty_port *port) 471{ 472 return port->count + port->blocked_open; 473} 474 475extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc); 476extern int tty_unregister_ldisc(int disc); 477extern int tty_set_ldisc(struct tty_struct *tty, int ldisc); 478extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty); 479extern void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty); 480extern void tty_ldisc_init(struct tty_struct *tty); 481extern void tty_ldisc_begin(void); 482/* This last one is just for the tty layer internals and shouldn't be used elsewhere */ 483extern void tty_ldisc_enable(struct tty_struct *tty); 484 485 486/* n_tty.c */ 487extern struct tty_ldisc_ops tty_ldisc_N_TTY; 488 489/* tty_audit.c */ 490#ifdef CONFIG_AUDIT 491extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data, 492 size_t size); 493extern void tty_audit_exit(void); 494extern void tty_audit_fork(struct signal_struct *sig); 495extern void tty_audit_tiocsti(struct tty_struct *tty, char ch); 496extern void tty_audit_push(struct tty_struct *tty); 497extern void tty_audit_push_task(struct task_struct *tsk, 498 uid_t loginuid, u32 sessionid); 499#else 500static inline void tty_audit_add_data(struct tty_struct *tty, 501 unsigned char *data, size_t size) 502{ 503} 504static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch) 505{ 506} 507static inline void tty_audit_exit(void) 508{ 509} 510static inline void tty_audit_fork(struct signal_struct *sig) 511{ 512} 513static inline void tty_audit_push(struct tty_struct *tty) 514{ 515} 516static inline void tty_audit_push_task(struct task_struct *tsk, 517 uid_t loginuid, u32 sessionid) 518{ 519} 520#endif 521 522/* tty_ioctl.c */ 523extern int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file, 524 unsigned int cmd, unsigned long arg); 525 526/* serial.c */ 527 528extern void serial_console_init(void); 529 530/* pcxx.c */ 531 532extern int pcxe_open(struct tty_struct *tty, struct file *filp); 533 534/* vt.c */ 535 536extern int vt_ioctl(struct tty_struct *tty, struct file *file, 537 unsigned int cmd, unsigned long arg); 538 539extern long vt_compat_ioctl(struct tty_struct *tty, struct file * file, 540 unsigned int cmd, unsigned long arg); 541 542#endif /* __KERNEL__ */ 543#endif 544