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/*-
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 * Copyright (c) 1982, 1986, 1993
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 *        The Regents of the University of California.  All rights reserved.
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 * (c) UNIX System Laboratories, Inc.
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 * All or some portions of this file are derived from material licensed
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 * to the University of California by American Telephone and Telegraph
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 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
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 * the permission of UNIX System Laboratories, Inc.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 *        @(#)tty.h        8.7 (Berkeley) 1/9/95
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 */
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#ifndef _SYS_TTY_H_
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#define _SYS_TTY_H_
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#include <sys/cdefs.h>
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#include <sys/termios.h>
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#include <sys/syslimits.h>
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#define TTYQ_SIZE        MAX_INPUT
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#define TTYQ_HIWAT        (TTYQ_SIZE - 10)
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struct tty_queue {
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        char        tq_buf[TTYQ_SIZE];
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        int        tq_head;
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        int        tq_tail;
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        int        tq_count;
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};
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/*
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 * Per-tty structure.
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 */
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struct tty {
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        struct tty_queue t_rawq;        /* raw input queue */
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        struct tty_queue t_canq;        /* canonical queue */
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        struct tty_queue t_outq;        /* ouput queue */
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        struct termios        t_termios;        /* termios state */
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        struct winsize        t_winsize;        /* window size */
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        struct event        t_input;        /* event for input data ready */
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        struct event        t_output;        /* event for output completion */
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        void (*t_oproc)(struct tty *);        /* routine to start output */
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        device_t        t_dev;                /* device */
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        int                t_state;        /* driver state */
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        int                t_column;        /* tty output column */
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        pid_t                t_pgid;                /* foreground process group. */
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        task_t                t_sigtask;        /* task to dispatch the tty signal */
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        int                t_signo;        /* pending signal# */
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        struct dpc        t_dpc;                /* dpc for tty */
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};
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#define        t_iflag                t_termios.c_iflag
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#define        t_oflag                t_termios.c_oflag
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#define        t_cflag                t_termios.c_cflag
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#define        t_lflag                t_termios.c_lflag
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#define        t_cc                t_termios.c_cc
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#define        t_ispeed        t_termios.c_ispeed
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#define        t_ospeed        t_termios.c_ospeed
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/* These flags are kept in t_state. */
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#define        TS_ASLEEP        0x00001                /* Process waiting for tty. */
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#define        TS_BUSY                0x00004                /* Draining output. */
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#define        TS_TIMEOUT        0x00100                /* Wait for output char processing. */
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#define        TS_TTSTOP        0x00200                /* Output paused. */
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#define        TS_ISIG                0x00400                /* Input is interrupted by signal. */
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__BEGIN_DECLS
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int         tty_read(struct tty *, char *, size_t *);
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int         tty_write(struct tty *, char *, size_t *);
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int         tty_ioctl(struct tty *, u_long, void *);
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void         tty_input(int, struct tty *);
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int         tty_getc(struct tty_queue *);
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void         tty_done(struct tty *);
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void         tty_attach(struct tty *);
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__END_DECLS
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#endif /* !_SYS_TTY_H_ */