178 lines
6.2 KiB
C
178 lines
6.2 KiB
C
/*
|
|
* Copyright (c) 1997-2006 Apple Computer, Inc. All rights reserved.
|
|
*
|
|
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
|
|
*
|
|
* This file contains Original Code and/or Modifications of Original Code
|
|
* as defined in and that are subject to the Apple Public Source License
|
|
* Version 2.0 (the 'License'). You may not use this file except in
|
|
* compliance with the License. The rights granted to you under the License
|
|
* may not be used to create, or enable the creation or redistribution of,
|
|
* unlawful or unlicensed copies of an Apple operating system, or to
|
|
* circumvent, violate, or enable the circumvention or violation of, any
|
|
* terms of an Apple operating system software license agreement.
|
|
*
|
|
* Please obtain a copy of the License at
|
|
* http://www.opensource.apple.com/apsl/ and read it before using this file.
|
|
*
|
|
* The Original Code and all software distributed under the License are
|
|
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
|
|
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
|
|
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
|
|
* Please see the License for the specific language governing rights and
|
|
* limitations under the License.
|
|
*
|
|
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
|
|
*/
|
|
/*-
|
|
* Copyright (c) 1982, 1986, 1991, 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. 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.
|
|
*
|
|
* @(#)tty_conf.c 8.4 (Berkeley) 1/21/94
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/tty.h>
|
|
#include <sys/conf.h>
|
|
|
|
#ifndef MAXLDISC
|
|
#define MAXLDISC 8
|
|
#endif
|
|
|
|
#define l_nodev (void (*)(void))&enodev
|
|
|
|
#define l_noopen ((l_open_t *) l_nodev)
|
|
#define l_noclose ((l_close_t *) l_nodev)
|
|
#define l_noread ((l_read_t *) l_nodev)
|
|
#define l_nowrite ((l_write_t *) l_nodev)
|
|
#define l_norint ((l_rint_t *) l_nodev)
|
|
|
|
static l_ioctl_t l_noioctl;
|
|
static l_start_t l_nostart;
|
|
|
|
/*
|
|
* XXX it probably doesn't matter what the entries other than the l_open
|
|
* entry are here. The l_noioctl and ttymodem entries still look fishy.
|
|
* Reconsider the removal of nullmodem anyway. It was too much like
|
|
* ttymodem, but a completely null version might be useful.
|
|
*/
|
|
#define NODISC(n) \
|
|
{ l_noopen, l_noclose, l_noread, l_nowrite, \
|
|
l_noioctl, l_norint, l_nostart, ttymodem }
|
|
|
|
struct linesw linesw[MAXLDISC] =
|
|
{
|
|
/* 0- termios */
|
|
{ ttyopen, ttylclose, ttread, ttwrite,
|
|
l_noioctl, ttyinput, ttwwakeup, ttymodem },
|
|
NODISC(1), /* 1- defunct */
|
|
/* 2- NTTYDISC */
|
|
{ ttyopen, ttylclose, ttread, ttwrite,
|
|
l_noioctl, ttyinput, ttwwakeup, ttymodem },
|
|
NODISC(3), /* TABLDISC */
|
|
NODISC(4), /* SLIPDISC */
|
|
NODISC(5), /* PPPDISC */
|
|
NODISC(6), /* loadable */
|
|
NODISC(7), /* loadable */
|
|
};
|
|
|
|
const int nlinesw = sizeof(linesw) / sizeof(linesw[0]);
|
|
|
|
static struct linesw nodisc = NODISC(0);
|
|
|
|
#define LOADABLE_LDISC 6
|
|
/*
|
|
* ldisc_register: Register a line discipline.
|
|
*
|
|
* discipline: Index for discipline to load, or LDISC_LOAD for us to choose.
|
|
* linesw_p: Pointer to linesw_p.
|
|
*
|
|
* Returns: Index used or -1 on failure.
|
|
*/
|
|
int
|
|
ldisc_register(int discipline, struct linesw *linesw_p)
|
|
{
|
|
int slot = -1;
|
|
|
|
if (discipline == LDISC_LOAD) {
|
|
int i;
|
|
for (i = LOADABLE_LDISC; i < MAXLDISC; i++) {
|
|
if (bcmp(linesw + i, &nodisc, sizeof(nodisc)) == 0) {
|
|
slot = i;
|
|
}
|
|
}
|
|
} else if (discipline >= 0 && discipline < MAXLDISC) {
|
|
slot = discipline;
|
|
}
|
|
|
|
if (slot != -1 && linesw_p) {
|
|
linesw[slot] = *linesw_p;
|
|
}
|
|
|
|
return slot;
|
|
}
|
|
|
|
/*
|
|
* ldisc_deregister: Deregister a line discipline obtained with
|
|
* ldisc_register. Can only deregister "loadable" ones now.
|
|
*
|
|
* discipline: Index for discipline to unload.
|
|
*/
|
|
void
|
|
ldisc_deregister(int discipline)
|
|
{
|
|
if (discipline >= LOADABLE_LDISC && discipline < MAXLDISC) {
|
|
linesw[discipline] = nodisc;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Do nothing specific version of line
|
|
* discipline specific ioctl command.
|
|
*/
|
|
static int
|
|
l_noioctl(__unused struct tty *tp, __unused u_long cmd, __unused caddr_t data,
|
|
__unused int flags, __unused struct proc *p)
|
|
{
|
|
return ENOTTY;
|
|
}
|
|
|
|
static void
|
|
l_nostart(__unused struct tty *tp)
|
|
{
|
|
}
|