/*-
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 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. 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
* SUCH DAMAGE.
*
* @(#)tty.h 8.7 (Berkeley) 1/9/95
*/
#ifndef _SYS_TTY_H
#define _SYS_TTY_H
#include <sys/cdefs.h>
#include <sys/termios.h>
#ifdef KERNEL
#define TTYQ_SIZE 256
#define TTYQ_HIWAT 246
struct tty_queue {
char tq_buf[TTYQ_SIZE];
int tq_head;
int tq_tail;
int tq_count;
};
/*
* Per-tty structure.
*/
struct tty {
struct tty_queue t_rawq; /* raw input queue */
struct tty_queue t_canq; /* canonical queue */
struct tty_queue t_outq; /* ouput queue */
struct termios t_termios; /* termios state */
struct winsize t_winsize; /* window size */
struct event t_input_event; /* event to sleep */
void (*t_output)(struct tty *); /* start output */
int t_state; /* driver state */
int t_column; /* tty output column */
pid_t t_pgid; /* foreground process group. */
};
#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_cc t_termios.c_cc
#define t_ispeed t_termios.c_ispeed
#define t_ospeed t_termios.c_ospeed
/* These flags are kept in t_state. */
#define TS_TTSTOP 0x00100 /* Output paused. */
__BEGIN_DECLS
int tty_register(struct devio *io, struct tty *tp,
void (*output)(struct tty*));
int ttyq_getc(struct tty_queue *tq);
void ttyq_putc(int c, struct tty_queue *tq);
int ttyq_unputc(struct tty_queue *tq);
int tty_read(struct tty *tp, char *buf, size_t *nbytes);
int tty_write(struct tty *tp, char *buf, size_t *nbyte);
int tty_ioctl(struct tty *tp, u_long cmd, void *data);
void tty_input(int c, struct tty *tp);
__END_DECLS
#endif /* KERNEL */
#endif /* !_SYS_TTY_H */