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487 lines
12 KiB
C
487 lines
12 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1982, 1986, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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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_compat.c 8.1 (Berkeley) 6/10/93
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_compat.h"
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/*
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* mapping routines for old line discipline (yuck)
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/ioctl_compat.h>
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#include <sys/tty.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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struct speedtab {
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int sp_speed; /* Speed. */
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int sp_code; /* Code. */
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};
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static int ttcompatgetflags(struct tty *tp);
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static void ttcompatsetflags(struct tty *tp, struct termios *t);
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static void ttcompatsetlflags(struct tty *tp, struct termios *t);
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static int ttcompatspeedtab(int speed, struct speedtab *table);
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static int ttydebug = 0;
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SYSCTL_INT(_debug, OID_AUTO, ttydebug, CTLFLAG_RW, &ttydebug, 0, "");
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static struct speedtab compatspeeds[] = {
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#define MAX_SPEED 17
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{ 115200, 17 },
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{ 57600, 16 },
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{ 38400, 15 },
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{ 19200, 14 },
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{ 9600, 13 },
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{ 4800, 12 },
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{ 2400, 11 },
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{ 1800, 10 },
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{ 1200, 9 },
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{ 600, 8 },
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{ 300, 7 },
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{ 200, 6 },
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{ 150, 5 },
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{ 134, 4 },
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{ 110, 3 },
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{ 75, 2 },
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{ 50, 1 },
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{ 0, 0 },
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{ -1, -1 },
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};
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static int compatspcodes[] = {
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0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
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1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200,
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};
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static int
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ttcompatspeedtab(int speed, struct speedtab *table)
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{
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if (speed == 0)
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return (0); /* hangup */
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for ( ; table->sp_speed > 0; table++)
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if (table->sp_speed <= speed) /* nearest one, rounded down */
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return (table->sp_code);
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return (1); /* 50, min and not hangup */
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}
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static int
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ttsetcompat(struct tty *tp, u_long *com, caddr_t data, struct termios *term)
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{
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switch (*com) {
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case TIOCSETP:
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case TIOCSETN: {
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struct sgttyb *sg = (struct sgttyb *)data;
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int speed;
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if ((speed = sg->sg_ispeed) > MAX_SPEED || speed < 0)
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return(EINVAL);
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else if (speed != ttcompatspeedtab(tp->t_termios.c_ispeed,
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compatspeeds))
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term->c_ispeed = compatspcodes[speed];
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else
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term->c_ispeed = tp->t_termios.c_ispeed;
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if ((speed = sg->sg_ospeed) > MAX_SPEED || speed < 0)
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return(EINVAL);
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else if (speed != ttcompatspeedtab(tp->t_termios.c_ospeed,
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compatspeeds))
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term->c_ospeed = compatspcodes[speed];
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else
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term->c_ospeed = tp->t_termios.c_ospeed;
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term->c_cc[VERASE] = sg->sg_erase;
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term->c_cc[VKILL] = sg->sg_kill;
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tp->t_compatflags = (tp->t_compatflags&0xffff0000) |
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(sg->sg_flags&0xffff);
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ttcompatsetflags(tp, term);
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*com = (*com == TIOCSETP) ? TIOCSETAF : TIOCSETA;
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break;
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}
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case TIOCSETC: {
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struct tchars *tc = (struct tchars *)data;
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cc_t *cc;
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cc = term->c_cc;
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cc[VINTR] = tc->t_intrc;
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cc[VQUIT] = tc->t_quitc;
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cc[VSTART] = tc->t_startc;
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cc[VSTOP] = tc->t_stopc;
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cc[VEOF] = tc->t_eofc;
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cc[VEOL] = tc->t_brkc;
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if (tc->t_brkc == (char)_POSIX_VDISABLE)
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cc[VEOL2] = _POSIX_VDISABLE;
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*com = TIOCSETA;
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break;
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}
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case TIOCSLTC: {
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struct ltchars *ltc = (struct ltchars *)data;
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cc_t *cc;
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cc = term->c_cc;
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cc[VSUSP] = ltc->t_suspc;
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cc[VDSUSP] = ltc->t_dsuspc;
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cc[VREPRINT] = ltc->t_rprntc;
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cc[VDISCARD] = ltc->t_flushc;
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cc[VWERASE] = ltc->t_werasc;
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cc[VLNEXT] = ltc->t_lnextc;
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*com = TIOCSETA;
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break;
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}
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case TIOCLBIS:
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case TIOCLBIC:
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case TIOCLSET:
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if (*com == TIOCLSET)
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tp->t_compatflags = (tp->t_compatflags&0xffff) |
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*(int *)data<<16;
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else {
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tp->t_compatflags = (ttcompatgetflags(tp)&0xffff0000) |
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(tp->t_compatflags&0xffff);
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if (*com == TIOCLBIS)
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tp->t_compatflags |= *(int *)data<<16;
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else
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tp->t_compatflags &= ~(*(int *)data<<16);
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}
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ttcompatsetlflags(tp, term);
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*com = TIOCSETA;
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break;
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}
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return 0;
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}
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/*ARGSUSED*/
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int
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tty_ioctl_compat(struct tty *tp, u_long com, caddr_t data, int fflag,
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struct thread *td)
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{
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switch (com) {
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case TIOCSETP:
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case TIOCSETN:
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case TIOCSETC:
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case TIOCSLTC:
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case TIOCLBIS:
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case TIOCLBIC:
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case TIOCLSET: {
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struct termios term;
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int error;
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term = tp->t_termios;
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if ((error = ttsetcompat(tp, &com, data, &term)) != 0)
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return error;
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return tty_ioctl(tp, com, &term, fflag, td);
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}
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case TIOCGETP: {
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struct sgttyb *sg = (struct sgttyb *)data;
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cc_t *cc = tp->t_termios.c_cc;
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sg->sg_ospeed = ttcompatspeedtab(tp->t_termios.c_ospeed,
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compatspeeds);
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if (tp->t_termios.c_ispeed == 0)
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sg->sg_ispeed = sg->sg_ospeed;
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else
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sg->sg_ispeed = ttcompatspeedtab(tp->t_termios.c_ispeed,
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compatspeeds);
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sg->sg_erase = cc[VERASE];
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sg->sg_kill = cc[VKILL];
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sg->sg_flags = tp->t_compatflags = ttcompatgetflags(tp);
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break;
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}
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case TIOCGETC: {
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struct tchars *tc = (struct tchars *)data;
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cc_t *cc = tp->t_termios.c_cc;
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tc->t_intrc = cc[VINTR];
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tc->t_quitc = cc[VQUIT];
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tc->t_startc = cc[VSTART];
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tc->t_stopc = cc[VSTOP];
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tc->t_eofc = cc[VEOF];
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tc->t_brkc = cc[VEOL];
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break;
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}
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case TIOCGLTC: {
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struct ltchars *ltc = (struct ltchars *)data;
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cc_t *cc = tp->t_termios.c_cc;
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ltc->t_suspc = cc[VSUSP];
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ltc->t_dsuspc = cc[VDSUSP];
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ltc->t_rprntc = cc[VREPRINT];
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ltc->t_flushc = cc[VDISCARD];
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ltc->t_werasc = cc[VWERASE];
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ltc->t_lnextc = cc[VLNEXT];
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break;
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}
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case TIOCLGET:
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tp->t_compatflags =
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(ttcompatgetflags(tp) & 0xffff0000UL)
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| (tp->t_compatflags & 0xffff);
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*(int *)data = tp->t_compatflags>>16;
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if (ttydebug)
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printf("CLGET: returning %x\n", *(int *)data);
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break;
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case OTIOCGETD:
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*(int *)data = 2;
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break;
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case OTIOCSETD: {
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int ldisczero = 0;
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return (tty_ioctl(tp, TIOCSETD,
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*(int *)data == 2 ? (caddr_t)&ldisczero : data,
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fflag, td));
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}
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case OTIOCCONS:
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*(int *)data = 1;
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return (tty_ioctl(tp, TIOCCONS, data, fflag, td));
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default:
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return (ENOIOCTL);
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}
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return (0);
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}
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static int
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ttcompatgetflags(struct tty *tp)
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{
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tcflag_t iflag = tp->t_termios.c_iflag;
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tcflag_t lflag = tp->t_termios.c_lflag;
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tcflag_t oflag = tp->t_termios.c_oflag;
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tcflag_t cflag = tp->t_termios.c_cflag;
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int flags = 0;
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if (iflag&IXOFF)
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flags |= TANDEM;
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if (iflag&ICRNL || oflag&ONLCR)
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flags |= CRMOD;
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if ((cflag&CSIZE) == CS8) {
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flags |= PASS8;
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if (iflag&ISTRIP)
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flags |= ANYP;
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}
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else if (cflag&PARENB) {
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if (iflag&INPCK) {
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if (cflag&PARODD)
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flags |= ODDP;
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else
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flags |= EVENP;
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} else
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flags |= EVENP | ODDP;
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}
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if ((lflag&ICANON) == 0) {
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/* fudge */
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if (iflag&(INPCK|ISTRIP|IXON) || lflag&(IEXTEN|ISIG)
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|| (cflag&(CSIZE|PARENB)) != CS8)
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flags |= CBREAK;
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else
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flags |= RAW;
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}
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if (!(flags&RAW) && !(oflag&OPOST) && (cflag&(CSIZE|PARENB)) == CS8)
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flags |= LITOUT;
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if (cflag&MDMBUF)
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flags |= MDMBUF;
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if ((cflag&HUPCL) == 0)
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flags |= NOHANG;
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if (oflag&TAB3)
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flags |= XTABS;
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if (lflag&ECHOE)
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flags |= CRTERA|CRTBS;
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if (lflag&ECHOKE)
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flags |= CRTKIL|CRTBS;
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if (lflag&ECHOPRT)
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flags |= PRTERA;
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if (lflag&ECHOCTL)
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flags |= CTLECH;
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if ((iflag&IXANY) == 0)
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flags |= DECCTQ;
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flags |= lflag&(ECHO|TOSTOP|FLUSHO|PENDIN|NOFLSH);
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if (ttydebug)
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printf("getflags: %x\n", flags);
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return (flags);
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}
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static void
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ttcompatsetflags(struct tty *tp, struct termios *t)
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{
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int flags = tp->t_compatflags;
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tcflag_t iflag = t->c_iflag;
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tcflag_t oflag = t->c_oflag;
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tcflag_t lflag = t->c_lflag;
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tcflag_t cflag = t->c_cflag;
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if (flags & RAW) {
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iflag = IGNBRK;
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lflag &= ~(ECHOCTL|ISIG|ICANON|IEXTEN);
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} else {
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iflag &= ~(PARMRK|IGNPAR|IGNCR|INLCR);
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iflag |= BRKINT|IXON|IMAXBEL;
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lflag |= ISIG|IEXTEN|ECHOCTL; /* XXX was echoctl on ? */
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if (flags & XTABS)
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oflag |= TAB3;
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else
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oflag &= ~TAB3;
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if (flags & CBREAK)
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lflag &= ~ICANON;
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else
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lflag |= ICANON;
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if (flags&CRMOD) {
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iflag |= ICRNL;
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oflag |= ONLCR;
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} else {
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iflag &= ~ICRNL;
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oflag &= ~ONLCR;
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}
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}
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if (flags&ECHO)
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lflag |= ECHO;
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else
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lflag &= ~ECHO;
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cflag &= ~(CSIZE|PARENB);
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if (flags&(RAW|LITOUT|PASS8)) {
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cflag |= CS8;
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if (!(flags&(RAW|PASS8))
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|| (flags&(RAW|PASS8|ANYP)) == (PASS8|ANYP))
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iflag |= ISTRIP;
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else
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iflag &= ~ISTRIP;
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if (flags&(RAW|LITOUT))
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oflag &= ~OPOST;
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else
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oflag |= OPOST;
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} else {
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cflag |= CS7|PARENB;
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iflag |= ISTRIP;
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oflag |= OPOST;
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}
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/* XXX don't set INPCK if RAW or PASS8? */
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if ((flags&(EVENP|ODDP)) == EVENP) {
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iflag |= INPCK;
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cflag &= ~PARODD;
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} else if ((flags&(EVENP|ODDP)) == ODDP) {
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iflag |= INPCK;
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cflag |= PARODD;
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} else
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iflag &= ~INPCK;
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if (flags&TANDEM)
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iflag |= IXOFF;
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else
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iflag &= ~IXOFF;
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if ((flags&DECCTQ) == 0)
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iflag |= IXANY;
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else
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iflag &= ~IXANY;
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t->c_iflag = iflag;
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t->c_oflag = oflag;
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t->c_lflag = lflag;
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t->c_cflag = cflag;
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}
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static void
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ttcompatsetlflags(struct tty *tp, struct termios *t)
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{
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int flags = tp->t_compatflags;
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tcflag_t iflag = t->c_iflag;
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tcflag_t oflag = t->c_oflag;
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tcflag_t lflag = t->c_lflag;
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tcflag_t cflag = t->c_cflag;
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iflag &= ~(PARMRK|IGNPAR|IGNCR|INLCR);
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if (flags&CRTERA)
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lflag |= ECHOE;
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else
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lflag &= ~ECHOE;
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if (flags&CRTKIL)
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lflag |= ECHOKE;
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else
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lflag &= ~ECHOKE;
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if (flags&PRTERA)
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lflag |= ECHOPRT;
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else
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lflag &= ~ECHOPRT;
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if (flags&CTLECH)
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lflag |= ECHOCTL;
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else
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lflag &= ~ECHOCTL;
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if (flags&TANDEM)
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iflag |= IXOFF;
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else
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iflag &= ~IXOFF;
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if ((flags&DECCTQ) == 0)
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iflag |= IXANY;
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else
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iflag &= ~IXANY;
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if (flags & MDMBUF)
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cflag |= MDMBUF;
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else
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cflag &= ~MDMBUF;
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if (flags&NOHANG)
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cflag &= ~HUPCL;
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else
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cflag |= HUPCL;
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lflag &= ~(TOSTOP|FLUSHO|PENDIN|NOFLSH);
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lflag |= flags&(TOSTOP|FLUSHO|PENDIN|NOFLSH);
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/*
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* The next if-else statement is copied from above so don't bother
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* checking it separately. We could avoid fiddlling with the
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* character size if the mode is already RAW or if neither the
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* LITOUT bit or the PASS8 bit is being changed, but the delta of
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* the change is not available here and skipping the RAW case would
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* make the code different from above.
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*/
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cflag &= ~(CSIZE|PARENB);
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if (flags&(RAW|LITOUT|PASS8)) {
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cflag |= CS8;
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if (!(flags&(RAW|PASS8))
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|| (flags&(RAW|PASS8|ANYP)) == (PASS8|ANYP))
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iflag |= ISTRIP;
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else
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iflag &= ~ISTRIP;
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if (flags&(RAW|LITOUT))
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oflag &= ~OPOST;
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else
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oflag |= OPOST;
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} else {
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cflag |= CS7|PARENB;
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iflag |= ISTRIP;
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oflag |= OPOST;
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}
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t->c_iflag = iflag;
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t->c_oflag = oflag;
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t->c_lflag = lflag;
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t->c_cflag = cflag;
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}
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