/*-
 * Copyright (c) 1982, 1986, 1991 The Regents of the University of California.
 * All rights reserved.
 *
 * 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. 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
 * SUCH DAMAGE.
 *
 * $Id: tty_compat.c,v 1.1 94/10/19 18:38:45 bill Exp $
 */

/* 
 * mapping routines for old line discipline (yuck)
 */
#ifdef COMPAT_43

#include "sys/param.h"
#include "sys/termios.h"
#include "sys/errno.h"
#include "sys/ioctl.h"
#include "tty.h"
#include "kernel.h"	/* lbolt */
#include "proc.h"
#include "prototypes.h"

int ttydebug = 0;

static struct speedtab compatspeeds[] = {
	38400,	15,
	19200,	14,
	9600,	13,
	4800,	12,
	2400,	11,
	1800,	10,
	1200,	9,
	600,	8,
	300,	7,
	200,	6,
	150,	5,
	134,	4,
	110,	3,
	75,	2,
	50,	1,
	0,	0,
	-1,	-1,
};
static int compatspcodes[16] = { 
	0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
	1800, 2400, 4800, 9600, 19200, 38400,
};

static void ttcompatsetlflags(struct tty *tp, struct termios *t);
static void ttcompatsetflags(struct tty *tp, struct termios *t);
static int ttcompatgetflags(struct tty *tp);

int
ttcompat(register struct tty *tp, int com, caddr_t data, int flag, struct proc *p)
{
	int error;

	/*
	 * If the ioctl involves modification,
	 * hang if in the background.
	 */
	switch (com) {

	case TIOCSETP:
	case TIOCSETN:
	case TIOCSETC:
	case TIOCSLTC:
	case TIOCLBIS:
	case TIOCLBIC:
	case TIOCLSET:
	case OTIOCSETD:
		while (isbackground(curproc, tp) && 
		   p->p_pgrp->pg_jobc && (p->p_flag&SPPWAIT) == 0 &&
		   (p->p_sigignore & sigmask(SIGTTOU)) == 0 &&
		   (p->p_sigmask & sigmask(SIGTTOU)) == 0) {
			pgsignal(p->p_pgrp, SIGTTOU, 1);
			if (error = ttysleep(tp, (caddr_t)&lbolt, 
			    TTOPRI | PCATCH, ttybg, 0)) 
				return (error);
		}
		break;
	}

	switch (com) {
	case TIOCGETP: {
		register struct sgttyb *sg = (struct sgttyb *)data;
		register u_char *cc = tp->t_cc;
		register speed;

		speed = ttspeedtab(tp->t_ospeed, compatspeeds);
		sg->sg_ospeed = (speed == -1) ? 15 : speed;
		if (tp->t_ispeed == 0)
			sg->sg_ispeed = sg->sg_ospeed;
		else {
			speed = ttspeedtab(tp->t_ispeed, compatspeeds);
			sg->sg_ispeed = (speed == -1) ? 15 : speed;
		}
		sg->sg_erase = cc[VERASE];
		sg->sg_kill = cc[VKILL];
		sg->sg_flags = ttcompatgetflags(tp);
		break;
	}

	case TIOCHPCL:
		tp->t_cflag |= HUPCL;
		break;

	case TIOCSETP:
	case TIOCSETN: {
		register struct sgttyb *sg = (struct sgttyb *)data;
		struct termios term;
		int speed;

		term = tp->t_termios;
		if ((speed = sg->sg_ispeed) > 15 || speed < 0)
			term.c_ispeed = speed;
		else
			term.c_ispeed = compatspcodes[speed];
		if ((speed = sg->sg_ospeed) > 15 || speed < 0)
			term.c_ospeed = speed;
		else
			term.c_ospeed = compatspcodes[speed];
		term.c_cc[VERASE] = sg->sg_erase;
		term.c_cc[VKILL] = sg->sg_kill;
		tp->t_flags = ttcompatgetflags(tp)&0xffff0000
			| sg->sg_flags&0xffff;
		ttcompatsetflags(tp, &term);
		return (ttioctl(tp, com == TIOCSETP ? TIOCSETAF : TIOCSETA, 
			(caddr_t)&term, flag, p));
	}

	case TIOCGETC: {
		struct tchars *tc = (struct tchars *)data;
		register u_char *cc = tp->t_cc;

		tc->t_intrc = cc[VINTR];
		tc->t_quitc = cc[VQUIT];
		tc->t_startc = cc[VSTART];
		tc->t_stopc = cc[VSTOP];
		tc->t_eofc = cc[VEOF];
		tc->t_brkc = cc[VEOL];
		break;
	}
	case TIOCSETC: {
		struct tchars *tc = (struct tchars *)data;
		register u_char *cc = tp->t_cc;

		cc[VINTR] = tc->t_intrc;
		cc[VQUIT] = tc->t_quitc;
		cc[VSTART] = tc->t_startc;
		cc[VSTOP] = tc->t_stopc;
		cc[VEOF] = tc->t_eofc;
		cc[VEOL] = tc->t_brkc;
		if (tc->t_brkc == -1)
			cc[VEOL2] = _POSIX_VDISABLE;
		break;
	}
	case TIOCSLTC: {
		struct ltchars *ltc = (struct ltchars *)data;
		register u_char *cc = tp->t_cc;

		cc[VSUSP] = ltc->t_suspc;
		cc[VDSUSP] = ltc->t_dsuspc;
		cc[VREPRINT] = ltc->t_rprntc;
		cc[VDISCARD] = ltc->t_flushc;
		cc[VWERASE] = ltc->t_werasc;
		cc[VLNEXT] = ltc->t_lnextc;
		break;
	}
	case TIOCGLTC: {
		struct ltchars *ltc = (struct ltchars *)data;
		register u_char *cc = tp->t_cc;

		ltc->t_suspc = cc[VSUSP];
		ltc->t_dsuspc = cc[VDSUSP];
		ltc->t_rprntc = cc[VREPRINT];
		ltc->t_flushc = cc[VDISCARD];
		ltc->t_werasc = cc[VWERASE];
		ltc->t_lnextc = cc[VLNEXT];
		break;
	}
	case TIOCLBIS:
	case TIOCLBIC:
	case TIOCLSET: {
		struct termios term;

		term = tp->t_termios;
		if (com == TIOCLSET)
			tp->t_flags = (ttcompatgetflags(tp)&0xffff)
				| *(int *)data<<16;
		else {
			tp->t_flags = ttcompatgetflags(tp);
			if (com == TIOCLBIS)
				tp->t_flags |= *(int *)data<<16;
			else
				tp->t_flags &= ~(*(int *)data<<16);
		}
		ttcompatsetlflags(tp, &term);
		return (ttioctl(tp, TIOCSETA, (caddr_t)&term, flag, p));
	}
	case TIOCLGET:
		*(int *)data = ttcompatgetflags(tp)>>16;
		if (ttydebug)
			printf("CLGET: returning %x\n", *(int *)data);
		break;

	case OTIOCGETD:
		*(int *)data = tp->t_line ? tp->t_line : 2;
		break;

	case OTIOCSETD: {
		int ldisczero = 0;

		return (ttioctl(tp, TIOCSETD, 
			*(int *)data == 2 ? (caddr_t)&ldisczero : data, flag, p));
	    }

	case OTIOCCONS:
		*(int *)data = 1;
		return (ttioctl(tp, TIOCCONS, data, flag, p));

	default:
		return (-1);
	}
	return (0);
}

static int
ttcompatgetflags(register struct tty *tp)
{
	long iflag = tp->t_iflag;
	long lflag = tp->t_lflag;
	long oflag = tp->t_oflag;
	long cflag = tp->t_cflag;
	register flags = 0;

	if (iflag&IXOFF)
		flags |= TANDEM;
	if (iflag&ICRNL || oflag&ONLCR)
		flags |= CRMOD;
	if (cflag&PARENB) {
		if (iflag&INPCK) {
			if (cflag&PARODD)
				flags |= ODDP;
			else
				flags |= EVENP;
		} else
			flags |= EVENP | ODDP;
	}
	
	if (!(oflag&OPOST) && (!(cflag&PARENB) || (cflag&CSIZE) == CS8))
		flags |= LITOUT;
	if ((cflag&CSIZE) == CS8 && !(iflag&ISTRIP))
		flags |= PASS8;

	if ((lflag&ICANON) == 0) {	
		/* fudge */
		if (oflag&OPOST || iflag&ISTRIP || iflag&IXON || lflag&ISIG
		    || lflag&IEXTEN || (cflag&PARENB) && (cflag&CSIZE) != CS8)
			flags |= CBREAK;
		else
			flags |= RAW;
	}
	if (oflag&OXTABS)
		flags |= XTABS;
	if (lflag&ECHOE)
		flags |= CRTERA|CRTBS;
	if (lflag&ECHOKE)
		flags |= CRTKIL|CRTBS;
	if (lflag&ECHOPRT)
		flags |= PRTERA;
	if (lflag&ECHOCTL)
		flags |= CTLECH;
	if ((iflag&IXANY) == 0)
		flags |= DECCTQ;
	flags |= lflag&(ECHO|MDMBUF|TOSTOP|FLUSHO|NOHANG|PENDIN|NOFLSH);
if (ttydebug)
	printf("getflags: %x\n", flags);
	return (flags);
}

static void
ttcompatsetflags(struct tty *tp, struct termios *t)
{
	register flags = tp->t_flags;
	long iflag = t->c_iflag;
	long oflag = t->c_oflag;
	long lflag = t->c_lflag;
	long cflag = t->c_cflag;

	if (flags & RAW) {
		iflag &= IXOFF;
		oflag &= ~OPOST;
		lflag &= ~(ECHOCTL|ISIG|ICANON|IEXTEN);
	} else {
		iflag |= BRKINT|IXON|IMAXBEL;
		oflag |= OPOST;
		lflag |= ISIG|IEXTEN|ECHOCTL;	/* XXX was echoctl on ? */
		if (flags & XTABS)
			oflag |= OXTABS;
		else
			oflag &= ~OXTABS;
		if (flags & CBREAK)
			lflag &= ~ICANON;
		else
			lflag |= ICANON;
		if (flags&CRMOD) {
			iflag |= ICRNL;
			oflag |= ONLCR;
		} else {
			iflag &= ~ICRNL;
			oflag &= ~ONLCR;
		}
	}
	if (flags&ECHO)
		lflag |= ECHO;
	else
		lflag &= ~ECHO;
		
	if (flags&(RAW|LITOUT|PASS8)) {
		cflag &= ~(CSIZE|PARENB);
		cflag |= CS8;
		if ((flags&(RAW|PASS8)) == 0)
			iflag |= ISTRIP;
		else
			iflag &= ~ISTRIP;
	} else {
		cflag &= ~CSIZE;
		cflag |= CS7;
		if (flags&(ODDP|EVENP))
			cflag |= PARENB;
		iflag |= ISTRIP;
	}
	if ((flags&(EVENP|ODDP)) == EVENP) {
		iflag |= INPCK;
		cflag &= ~PARODD;
	} else if ((flags&(EVENP|ODDP)) == ODDP) {
		iflag |= INPCK;
		cflag |= PARODD;
	} else 
		iflag &= ~INPCK;
	/* if (flags&LITOUT)
		oflag &= ~OPOST;	/* move earlier ? */
	if (flags&TANDEM)
		iflag |= IXOFF;
	else
		iflag &= ~IXOFF;
	t->c_iflag = iflag;
	t->c_oflag = oflag;
	t->c_lflag = lflag;
	t->c_cflag = cflag;
}

static void
ttcompatsetlflags(struct tty *tp, struct termios *t)
{
	register flags = tp->t_flags;
	long iflag = t->c_iflag;
	long oflag = t->c_oflag;
	long lflag = t->c_lflag;
	long cflag = t->c_cflag;

	if (flags&CRTERA)
		lflag |= ECHOE;
	else
		lflag &= ~ECHOE;
	if (flags&CRTKIL)
		lflag |= ECHOKE;
	else
		lflag &= ~ECHOKE;
	if (flags&PRTERA)
		lflag |= ECHOPRT;
	else
		lflag &= ~ECHOPRT;
	if (flags&CTLECH)
		lflag |= ECHOCTL;
	else
		lflag &= ~ECHOCTL;
	if ((flags&DECCTQ) == 0)
		lflag |= IXANY;
	else
		lflag &= ~IXANY;
	lflag &= ~(MDMBUF|TOSTOP|FLUSHO|NOHANG|PENDIN|NOFLSH);
	lflag |= flags&(MDMBUF|TOSTOP|FLUSHO|NOHANG|PENDIN|NOFLSH);
	if (flags&(LITOUT|PASS8)) {
		iflag &= ~ISTRIP;
		cflag &= ~(CSIZE|PARENB);
		cflag |= CS8;
		/* if (flags&LITOUT)
			oflag &= ~OPOST; */
		if ((flags&(PASS8|RAW)) == 0)
			iflag |= ISTRIP;
	} else if ((flags&RAW) == 0) {
		cflag &= ~CSIZE;
		cflag |= CS7;
		if (flags&(ODDP|EVENP))
			cflag |= PARENB;
		oflag |= OPOST;
	}
	t->c_iflag = iflag;
	t->c_oflag = oflag;
	t->c_lflag = lflag;
	t->c_cflag = cflag;
}
#endif	/* COMPAT_43 */
