* Copyright (c) 1982, 1986 The Regents of the University of California.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* @(#)tty.h 7.10 (Berkeley) 6/26/91
* $Header: /usr/bill/working/sys/sys/RCS/tty.h,v 1.3 92/01/21 21:51:49 william Exp $
* Ring buffers provide a contiguous, dense storage for
* character data used by the tty driver.
char *rb_hd
; /* head of buffer segment to be read */
char *rb_tl
; /* tail of buffer segment to be written */
char rb_buf
[RBSZ
]; /* segment contents */
#define RB_SUCC(rbp, p) \
((p) >= (rbp)->rb_buf + RBSZ - 1 ? (rbp)->rb_buf : (p) + 1)
#define RB_ROLLOVER(rbp, p) \
((p) > (rbp)->rb_buf + RBSZ - 1 ? (rbp)->rb_buf : (p))
#define RB_PRED(rbp, p) \
((p) <= (rbp)->rb_buf ? (rbp)->rb_buf + RBSZ - 1 : (p) - 1)
((rp)->rb_hd <= (rp)->rb_tl ? (rp)->rb_tl - (rp)->rb_hd : \
RBSZ - 1 - ((rp)->rb_hd - (rp)->rb_tl))
#define RB_CONTIGPUT(rp) \
(RB_PRED(rp, (rp)->rb_hd) < (rp)->rb_tl ? \
(rp)->rb_buf + RBSZ - (rp)->rb_tl : \
RB_PRED(rp, (rp)->rb_hd) - (rp)->rb_tl)
#define RB_CONTIGGET(rp) \
((rp)->rb_hd <= (rp)->rb_tl ? (rp)->rb_tl - (rp)->rb_hd : \
(rp)->rb_buf + RBSZ - (rp)->rb_hd)
* Should be split in two, into device and tty drivers.
* Glue could be masks of what to echo and circular buffer
int (*t_oproc
)(); /* device */
int (*t_param
)(); /* device */
struct proc
*t_rsel
; /* tty */
caddr_t T_LINEP
; /* XXX */
caddr_t t_addr
; /* ??? */
dev_t t_dev
; /* device */
int t_flags
; /* (compat) some of both */
int t_state
; /* some of both */
struct session
*t_session
; /* tty */
struct pgrp
*t_pgrp
; /* foreground process group */
short t_rocount
, t_rocol
; /* tty */
short t_hiwat
; /* hi water mark */
short t_lowat
; /* low water mark */
struct winsize t_winsize
; /* window size */
struct termios t_termios
; /* termios state */
#define t_iflag t_termios.c_iflag
#define t_oflag t_termios.c_oflag
#define t_cflag t_termios.c_cflag
#define t_lflag t_termios.c_lflag
#define t_min t_termios.c_min
#define t_time t_termios.c_time
#define t_cc t_termios.c_cc
#define t_ispeed t_termios.c_ispeed
#define t_ospeed t_termios.c_ospeed
long t_cancc
; /* stats */
short t_gen
; /* generation number */
short t_mask
; /* interrupt mask */
struct ringb t_raw
; /* ring buffers */
#define TTIPRI 25 /* sleep priority for tty reads */
#define TTOPRI 26 /* sleep priority for tty writes */
#define TTMAXHIWAT (RBSZ/2) /* XXX */
extern struct ttychars ttydefaults
;
/* internal state bits */
#define TS_TIMEOUT 0x000001 /* delay timeout in progress */
#define TS_WOPEN 0x000002 /* waiting for open to complete */
#define TS_ISOPEN 0x000004 /* device is open */
#define TS_FLUSH 0x000008 /* outq has been flushed during DMA */
#define TS_CARR_ON 0x000010 /* software copy of carrier-present */
#define TS_BUSY 0x000020 /* output in progress */
#define TS_ASLEEP 0x000040 /* wakeup when output done */
#define TS_XCLUDE 0x000080 /* exclusive-use flag against open */
#define TS_TTSTOP 0x000100 /* output stopped by ctl-s */
/* was TS_HUPCLS 0x000200 * hang up upon last close */
#define TS_TBLOCK 0x000400 /* tandem queue blocked */
#define TS_RCOLL 0x000800 /* collision in read select */
#define TS_WCOLL 0x001000 /* collision in write select */
#define TS_ASYNC 0x004000 /* tty in async i/o mode */
/* state for intra-line fancy editing work */
#define TS_BKSL 0x010000 /* state for lowercase \ work */
#define TS_ERASE 0x040000 /* within a \.../ for PRTRUB */
#define TS_LNCH 0x080000 /* next character is literal */
#define TS_TYPEN 0x100000 /* retyping suspended input (PENDIN) */
#define TS_CNTTB 0x200000 /* counting tab width, ignore FLUSHO */
#define TS_LOCAL (TS_BKSL|TS_ERASE|TS_LNCH|TS_TYPEN|TS_CNTTB)
/* define partab character types */
* Flags on character passed to ttyinput
#define TTY_CHARMASK 0x000000ff /* Character mask */
#define TTY_QUOTE 0x00000100 /* Character quoted */
#define TTY_ERRORMASK 0xff000000 /* Error mask */
#define TTY_FE 0x01000000 /* Framing error or BREAK condition */
#define TTY_PE 0x02000000 /* Parity error */
* Is tp controlling terminal for p
#define isctty(p, tp) ((p)->p_session == (tp)->t_session && \
* Is p in background of tp
#define isbackground(p, tp) (isctty((p), (tp)) && \
(p)->p_pgrp != (tp)->t_pgrp)
* Modem control commands (driver).
/* symbolic sleep message strings */
extern char ttyin
[], ttyout
[], ttopen
[], ttclos
[], ttybg
[], ttybuf
[];