sys/kern/tty_compat.c

/*-
 * 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.
 *
 *      from: @(#)tty_compat.c  7.10 (Berkeley) 5/9/91
 *      $Id$
 */

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

#include "param.h"
#include "systm.h"
#include "ioctl.h"
#include "tty.h"
#include "termios.h"
#include "proc.h"
#include "file.h"
#include "conf.h"
#include "dkstat.h"
#include "kernel.h"
#include "syslog.h"

int ttydebug = 0;

static struct speedtab compatspeeds[] = {
#define MAX_SPEED       17
        115200, 17,
        57600,  16,
        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[] = {
        0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
        1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200,
};

/*ARGSUSED*/
ttcompat(tp, com, data, flag)
        register struct tty *tp;
        caddr_t data;
{

        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) ? MAX_SPEED : speed;
                if (tp->t_ispeed == 0)
                        sg->sg_ispeed = sg->sg_ospeed;
                else {
                        speed = ttspeedtab(tp->t_ispeed, compatspeeds);
                        sg->sg_ispeed = (speed == -1) ? MAX_SPEED : speed;
                }
                sg->sg_erase = cc[VERASE];
                sg->sg_kill = cc[VKILL];
                sg->sg_flags = tp->t_flags = ttcompatgetflags(tp);
                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) > MAX_SPEED || speed < 0)
                        term.c_ispeed = speed;
                else
                        term.c_ispeed = compatspcodes[speed];
                if ((speed = sg->sg_ospeed) > MAX_SPEED || 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 = tp->t_flags&0xffff0000 | sg->sg_flags&0xffff;
                ttcompatsetflags(tp, &term);
                return (ttioctl(tp, com == TIOCSETP ? TIOCSETAF : TIOCSETA,
                        (caddr_t)&term, flag));
        }

        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 = (tp->t_flags&0xffff) | *(int *)data<<16;
                else {
                        tp->t_flags =
                         (ttcompatgetflags(tp)&0xffff0000)|(tp->t_flags&0xffff);
                        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));
        }
        case TIOCLGET:
                tp->t_flags =
                 (ttcompatgetflags(tp)&0xffff0000)|(tp->t_flags&0xffff);
                *(int *)data = tp->t_flags>>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));
            }

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

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

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

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

        if ((lflag&ICANON) == 0) {
                /* fudge */
                if (iflag&(INPCK|ISTRIP|IXON) || lflag&(IEXTEN|ISIG)
                    || cflag&(CSIZE|PARENB) != CS8)
                        flags |= CBREAK;
                else
                        flags |= RAW;
        }
        if (!(flags&RAW) && !(oflag&OPOST) && cflag&(CSIZE|PARENB) == CS8)
                flags |= LITOUT;
        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);
}

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

        if (flags & RAW) {
                iflag &= IXOFF|IXANY;
                lflag &= ~(ECHOCTL|ISIG|ICANON|IEXTEN);
        } else {
                iflag |= BRKINT|IXON|IMAXBEL;
                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;

        cflag &= ~(CSIZE|PARENB);
        if (flags&(RAW|LITOUT|PASS8)) {
                cflag |= CS8;
                if (!(flags&(RAW|PASS8))
                    || (flags&(RAW|PASS8|ANYP)) == (PASS8|ANYP))
                        iflag |= ISTRIP;
                else
                        iflag &= ~ISTRIP;
                if (flags&(RAW|LITOUT))
                        oflag &= ~OPOST;
                else
                        oflag |= OPOST;
        } else {
                cflag |= CS7|PARENB;
                iflag |= ISTRIP;
                oflag |= OPOST;
        }
        if ((flags&(EVENP|ODDP)) == EVENP) {
                iflag |= INPCK;
                cflag &= ~PARODD;
        } else if ((flags&(EVENP|ODDP)) == ODDP) {
                iflag |= INPCK;
                cflag |= PARODD;
        } else
                iflag &= ~INPCK;
        if (flags&TANDEM)
                iflag |= IXOFF;
        else
                iflag &= ~IXOFF;
        t->c_iflag = iflag;
        t->c_oflag = oflag;
        t->c_lflag = lflag;
        t->c_cflag = cflag;
}

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

        cflag &= ~(CSIZE|PARENB);
        /*
         * The next if-else statement is copied from above so don't bother
         * checking it separately.  We could avoid fiddlling with the
         * character size if the mode is already RAW or if neither the
         * LITOUT bit or the PASS8 bit is being changed, but the delta of
         * the change is not available here and skipping the RAW case would
         * make the code different from above.
         */
        if (flags&(RAW|LITOUT|PASS8)) {
                cflag |= CS8;
                if (!(flags&(RAW|PASS8))
                    || (flags&(RAW|PASS8|ANYP)) == (PASS8|ANYP))
                        iflag |= ISTRIP;
                else
                        iflag &= ~ISTRIP;
                if (flags&(RAW|LITOUT))
                        oflag &= ~OPOST;
                else
                        oflag |= OPOST;
        } else {
                cflag |= CS7|PARENB;
                iflag |= ISTRIP;
                oflag |= OPOST;
        }
        t->c_iflag = iflag;
        t->c_oflag = oflag;
        t->c_lflag = lflag;
        t->c_cflag = cflag;
}
#endif  /* COMPAT_43 */