Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
NetBSD/sys/kern/tty_conf.c

303 lines
8.0 KiB
C
Raw Blame History

/* $NetBSD: tty_conf.c,v 1.28 2000/11/01 23:51:39 eeh Exp $ */
/*-
* 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 8.5 (Berkeley) 1/9/95
*/
#include "opt_compat_freebsd.h"
#include "opt_compat_43.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <sys/tty.h>
#include <sys/ioctl.h>
#include <sys/ttycom.h>
#include <sys/conf.h>
#include <sys/malloc.h>
#include "tb.h"
#if NTB > 0
int tbopen __P((dev_t dev, struct tty *tp));
int tbclose __P((struct tty *tp, int flags));
int tbread __P((struct tty *tp, struct uio *uio, int flags));
int tbtioctl __P((struct tty *tp, u_long cmd, caddr_t data,
int flag, struct proc *p));
int tbinput __P((int c, struct tty *tp));
#endif
#include "sl.h"
#if NSL > 0
int slopen __P((dev_t dev, struct tty *tp));
int slclose __P((struct tty *tp, int flags));
int sltioctl __P((struct tty *tp, u_long cmd, caddr_t data,
int flag, struct proc *p));
int slinput __P((int c, struct tty *tp));
int slstart __P((struct tty *tp));
#endif
#include "ppp.h"
#if NPPP > 0
int pppopen __P((dev_t dev, struct tty *tp));
int pppclose __P((struct tty *tp, int flags));
int ppptioctl __P((struct tty *tp, u_long cmd, caddr_t data,
int flag, struct proc *p));
int pppinput __P((int c, struct tty *tp));
int pppstart __P((struct tty *tp));
int pppread __P((struct tty *tp, struct uio *uio, int flag));
int pppwrite __P((struct tty *tp, struct uio *uio, int flag));
#endif
#include "strip.h"
#if NSTRIP > 0
int stripopen __P((dev_t dev, struct tty *tp));
int stripclose __P((struct tty *tp, int flags));
int striptioctl __P((struct tty *tp, u_long cmd, caddr_t data,
int flag, struct proc *p));
int stripinput __P((int c, struct tty *tp));
int stripstart __P((struct tty *tp));
#endif
struct linesw termios_disc =
{ "termios", 0, ttylopen, ttylclose, ttread, ttwrite, nullioctl,
ttyinput, ttstart, ttymodem }; /* 0- termios */
struct linesw defunct_disc =
{ "defunct", 1, ttynodisc, ttyerrclose, ttyerrio, ttyerrio, nullioctl,
ttyerrinput, ttyerrstart, nullmodem }; /* 1- defunct */
#if defined(COMPAT_43) || defined(COMPAT_FREEBSD)
struct linesw ntty_disc =
{ "ntty", 2, ttylopen, ttylclose, ttread, ttwrite, nullioctl,
ttyinput, ttstart, ttymodem }; /* 2- old NTTYDISC */
#endif
#if NTB > 0
struct linesw table_disc =
{ "table", 3, tbopen, tbclose, tbread, ttyerrio, tbtioctl,
tbinput, ttstart, nullmodem }; /* 3- TABLDISC */
#endif
#if NSL > 0
struct linesw slip_disc =
{ "slip", 4, slopen, slclose, ttyerrio, ttyerrio, sltioctl,
slinput, slstart, nullmodem }; /* 4- SLIPDISC */
#endif
#if NPPP > 0
struct linesw ppp_disc =
{ "ppp", 5, pppopen, pppclose, pppread, pppwrite, ppptioctl,
pppinput, pppstart, ttymodem }; /* 5- PPPDISC */
#endif
#if NSTRIP > 0
struct linesw strip_disc =
{ "strip", 6, stripopen, stripclose, ttyerrio, ttyerrio, striptioctl,
stripinput, stripstart, nullmodem }; /* 6- STRIPDISC */
#endif
/*
* Registered line disciplines. Don't use this
* it will go away.
*/
#define LSWITCHBRK 20
struct linesw **linesw = NULL;
int nlinesw = 0;
int slinesw = 0;
/*
* Do nothing specific version of line
* discipline specific ioctl command.
*/
/*ARGSUSED*/
int
nullioctl(tp, cmd, data, flags, p)
struct tty *tp;
u_long cmd;
char *data;
int flags;
struct proc *p;
{
#ifdef lint
tp = tp; data = data; flags = flags; p = p;
#endif
return (-1);
}
/*
* Register a line discipline, optionally providing a
* specific discipline number for compatibility, -1 allocates
* a new one. Returns a discipline number, or -1 on
* failure.
*/
int
ttyldisc_add(disc, no)
struct linesw *disc;
int no;
{
/* You are not allowed to exceed TTLINEDNAMELEN */
if (strlen(disc->l_name) > TTLINEDNAMELEN)
return (-1);
/*
* You are not allowed to specify a line switch
* compatibility number greater than 10.
*/
if (no > 10)
return (-1);
if (linesw == NULL)
panic("adding uninitialized linesw");
if (no == -1) {
/* Hunt for any slot */
for (no = slinesw; no-->0; )
if (linesw[no] == NULL) break;
/* if no == -1 we should realloc linesw. */
}
/* Need a specific slot */
if (linesw[no] != NULL)
return (-1);
linesw[no] = disc;
disc->l_no = no;
/* Define size of table */
if (no >= nlinesw)
nlinesw = no + 1;
return (no);
}
/*
* Remove a line discipline by its name. Returns the
* discipline on success or NULL on failure.
*/
struct linesw *
ttyldisc_remove(name)
char *name;
{
struct linesw *disc;
int i;
if (linesw == NULL)
panic("removing uninitialized linesw");
for (i=0; i<nlinesw; i++) {
if (linesw[i] && (strcmp(name, linesw[i]->l_name) == 0)) {
disc = linesw[i];
linesw[i] = NULL;
if (nlinesw == i + 1) {
/* Need to fix up array sizing */
while (i && (linesw[i] != NULL))
i--;
nlinesw = i + i;
}
return (disc);
}
}
return (NULL);
}
/*
* Look up a line discipline by its name.
*/
struct linesw *
ttyldisc_lookup(name)
char *name;
{
int i;
for (i=0; i<nlinesw; i++)
if (linesw[i] && (strcmp(name, linesw[i]->l_name) == 0))
return (linesw[i]);
return (NULL);
}
#define TTYLDISCINIT(s, v) \
do { \
if (ttyldisc_add(&(s), (v)) != (v)) \
panic(__CONCAT("ttyldisc_init: ", __STRING(s))); \
} while (0);
/*
* Register the basic line disciplines.
*/
void
ttyldisc_init() {
/* Only initialize once */
if (linesw)
return;
slinesw = LSWITCHBRK;
linesw = malloc(slinesw * sizeof(struct linesw *),
M_TTYS, M_WAITOK);
bzero(linesw, slinesw * sizeof(struct linesw *));
TTYLDISCINIT(termios_disc, 0);
/* Do we really need this one? */
TTYLDISCINIT(defunct_disc, 1);
/*
* The following should really be moved to
* initialization code for each module.
*/
#if defined(COMPAT_43) || defined(COMPAT_FREEBSD)
TTYLDISCINIT(ntty_disc, 2);
#endif
#if NTB > 0
TTYLDISCINIT(table_disc, 3);
#endif
#if NSL > 0
TTYLDISCINIT(slip_disc, 4);
#endif
#if NPPP > 0
TTYLDISCINIT(ppp_disc, 5);
#endif
#if NSTRIP > 0
TTYLDISCINIT(strip_disc, 6);
#endif
}
Reference in New Issue View Git Blame Copy Permalink