include/linux/tty.h

1 /* SPDX-License-Identifier: GPL-2.0 */
34 #define INTR_CHAR(tty) ((tty)->termios.c_cc[VINTR])
35 #define QUIT_CHAR(tty) ((tty)->termios.c_cc[VQUIT])
36 #define ERASE_CHAR(tty) ((tty)->termios.c_cc[VERASE])
37 #define KILL_CHAR(tty) ((tty)->termios.c_cc[VKILL])
38 #define EOF_CHAR(tty) ((tty)->termios.c_cc[VEOF])
39 #define TIME_CHAR(tty) ((tty)->termios.c_cc[VTIME])
40 #define MIN_CHAR(tty) ((tty)->termios.c_cc[VMIN])
41 #define SWTC_CHAR(tty) ((tty)->termios.c_cc[VSWTC])
42 #define START_CHAR(tty) ((tty)->termios.c_cc[VSTART])
43 #define STOP_CHAR(tty) ((tty)->termios.c_cc[VSTOP])
44 #define SUSP_CHAR(tty) ((tty)->termios.c_cc[VSUSP])
45 #define EOL_CHAR(tty) ((tty)->termios.c_cc[VEOL])
46 #define REPRINT_CHAR(tty) ((tty)->termios.c_cc[VREPRINT])
47 #define DISCARD_CHAR(tty) ((tty)->termios.c_cc[VDISCARD])
48 #define WERASE_CHAR(tty) ((tty)->termios.c_cc[VWERASE])
49 #define LNEXT_CHAR(tty)	((tty)->termios.c_cc[VLNEXT])
50 #define EOL2_CHAR(tty) ((tty)->termios.c_cc[VEOL2])
52 #define _I_FLAG(tty, f)	((tty)->termios.c_iflag & (f))
53 #define _O_FLAG(tty, f)	((tty)->termios.c_oflag & (f))
54 #define _C_FLAG(tty, f)	((tty)->termios.c_cflag & (f))
55 #define _L_FLAG(tty, f)	((tty)->termios.c_lflag & (f))
122  * struct tty_struct - state associated with a tty while open
130  * @ldisc_sem: protects line discipline changes (@ldisc) -- lock tty not pty
134  * @legacy_mutex: leftover from history (BKL -> BTM -> @legacy_mutex),
148  * @flow: flow settings grouped together
149  * @flow.lock: lock for @flow members
150  * @flow.stopped: tty stopped/started by stop_tty()/start_tty()
151  * @flow.tco_stopped: tty stopped/started by %TCOOFF/%TCOON ioctls (it has
152  *		      precedence over @flow.stopped)
161  * @hw_stopped: not controlled by the tty layer, under @driver's control for CTS
166  * @link: link to another pty (master -> slave and vice versa)
215 	} flow;  member
260  * tty->write.  Thus, you must use the inline functions set_bit() and
270  *	fail, returning -%EIO. (May be no ldisc too.)
322 	return file->f_flags & O_NONBLOCK ||  in tty_io_nonblock()
323 		test_bit(TTY_LDISC_CHANGING, &tty->flags);  in tty_io_nonblock()
328 	return test_bit(TTY_IO_ERROR, &tty->flags);  in tty_io_error()
333 	return test_bit(TTY_THROTTLED, &tty->flags);  in tty_throttled()
372 { return ERR_PTR(-ENODEV); }  in tty_kopen_exclusive()
376 { return -ENOTSUPP; }  in tty_dev_name_to_number()
386  * tty_kref_get - get a tty reference
397 		kref_get(&tty->kref);  in tty_kref_get()
432  * tty_get_baud_rate - get tty bit rates
441 	return tty_termios_baud_rate(&tty->termios);  in tty_get_baud_rate()