From dual!amd!megatest!cadvax.roman Sat Oct 12 18:33:10 1985
Date: Thu, 10 Oct 85 10:45:25 pdt
From: dual!amd!megatest!cadvax.roman (Roman Rycerz)
To: lll-crg!seismo!keith
Subject: bk driver

here is the bk driver that handles mapped buffers..
it works and we run berknet here to connect small test stations
to a central host...

-roman

{lbl-csam,decvax!decwrl![sun|amd|fortune]}!megatest!roman

----------------------- CUT HERE --------------------------------------
: This is a shar archive.  Extract with sh, not csh.
: This archive ends with exit, so do not worry about trailing junk.
echo 'Extracting bk.h'
sed 's/^X//' > bk.h << '+ END-OF-FILE bk.h'
X#define	NBK	1
X/* BK_DEBUG			/* turn on debugging */
+ END-OF-FILE bk.h
chmod 'u=rw,g=r,o=r' 'bk.h'
echo '	-rw-r--r-- 1 root       52 Oct  9 22:27 bk.h        (as sent)'
echo -n '	'
/bin/ls -l bk.h
echo 'Extracting dev/bk.c'
sed 's/^X//' > dev/bk.c << '+ END-OF-FILE dev/bk.c'
X#include "param.h"
X#include "bk.h"
X#if NBK > 0
X#include <sys/systm.h>
X#include <sys/seg.h>
X#include <sys/dir.h>
X#include <sys/user.h>
X#include <sys/tty.h>
X#include <sys/proc.h>
X#ifdef	MPX_FILS
X#include <sys/mx.h>
X#endif
X#include <sys/inode.h>
X#include <sys/file.h>
X#include <sys/conf.h>
X#include <sys/buf.h>
X
X/*
X *	SCCS id	@(#)bk.c	2.1 (Berkeley)	8/5/83
X */
X
X#ifdef UCB_NTTY
X#ifdef BK_DEBUG
Xint bkdbg = 1;
X#define	DBG_printf	if(bkdbg) printf	/* debugging printf */
X#else
X#define	DBG_printf	bknull			/* null routine */
Xbknull(s,a,b,c,d) char *s;{};
X#endif
X
X/*
X * When running dz's using only SAE (silo alarm) on input
X * it is necessary to call dzrint() at clock interrupt time.
X * This is unsafe unless spl5()s in tty code are changed to
X * spl6()s to block clock interrupts.  Note that the dh driver
X * currently in use works the same way as the dz, even though
X * we could try to more intelligently manage its silo.
X * Thus don't take this out if you have no dz's unless you
X * change clock.c and dhtimer().
X */
X#define	spl5	spl6
X
X/*
X * Line discipline for Berkeley network.
X *
X * This supplies single lines to a user level program
X * with a minimum of fuss.  Lines are newline terminated.
X * A later version will implement full 8-bit paths by providing
X * an escape sequence to include a newline in a record.
X *
X * This discipline requires that tty device drivers call
X * the line specific l_ioctl routine from their ioctl routines,
X * assigning the result to cmd so that we can refuse most tty specific
X * ioctls which are unsafe because we have ambushed the
X * teletype input queues, overlaying them with other information.
X */
X
X/*
X * Open as networked discipline.  Called when discipline changed
X * with ioctl, this assigns a buffer to the line for input, and
X * changing the interpretation of the information in the tty structure.
X */
Xbkopen(tp)
Xregister struct tty *tp;
X{
X	register struct buf *bp;
X
X	if (u.u_error)
X		return;		/* paranoia */
X	/*
X	 * The suser check was added since once it gets set you can't turn
X	 * it off, even as root.  Theoretically a setuid root program could
X	 * be run over the net which opened /dev/tty but this seems farfetched.
X	 */
X	if (tp->t_line == NETLDISC && !suser()) {
X		u.u_error = EBUSY;		/* sometimes the network */
X		return;				/* ... opens /dev/tty */
X	}
X	bp = geteblk();
X	flushtty(tp,FREAD|FWRITE);
X	tp->t_bufp = bp;
X#ifndef NOKA5
X	tp->t_cp = (char *)mapin(bp);
X	mapout(bp);
X#else
X	tp->t_cp = (char *)tp->t_bufp->b_un.b_addr;
X#endif
X	tp->t_inbuf = 0;
X	tp->t_rec = 0;
X	DBG_printf("bkop: bp %o cp %o\n",tp->t_bufp,tp->t_cp);
X}
X
X/*
X * Break down... called when discipline changed or from device
X * close routine.
X */
Xbkclose(tp)
Xregister struct tty *tp;
X{
X	register s;
X	register struct buf *bp;
X
X	DBG_printf("bkcl: bp %o cp %o\n",tp->t_bufp,tp->t_cp);
X	s = spl5();
X	wakeup((caddr_t)&tp->t_bufp);
X	if (tp->t_bufp) {
X		brelse(tp->t_bufp);
X		tp->t_bufp = 0;
X	}
X	tp->t_cp = 0;
X	tp->t_inbuf = 0;
X	tp->t_rec = 0;
X	tp->t_line = DFLT_LDISC;		/* paranoid: avoid races */
X	splx(s);
X}
X
X/*
X * Read from a network line.
X * Characters have been buffered in a system buffer and are
X * now dumped back to the user in one fell swoop, and with a
X * minimum of fuss.  Note that no input is accepted when a record
X * is waiting.  Our clearing tp->t_rec here allows further input
X * to accumulate.
X */
Xbkread(tp)
Xregister struct tty *tp;
X{
X	register int i;
X	register s;
X
X	if ((tp->t_state&CARR_ON)==0)
X		return (-1);
X	DBG_printf("bkrd: bp %o cp %o\n",tp->t_bufp,tp->t_cp);
X	s = spl5();
X	while (tp->t_rec == 0 && tp->t_line == NETLDISC)
X		sleep((caddr_t)&tp->t_bufp, TTIPRI);
X	splx(s);
X	if (tp->t_line != NETLDISC)
X		return (-1);
X	i = MIN(tp->t_inbuf, (int)u.u_count);
X#ifndef NOKA5
X	if (copyout(mapin(tp->t_bufp), u.u_base, (unsigned)i)) {
X		mapout(tp->t_bufp);
X		u.u_error = EFAULT;
X		return (-1);
X	};
X		mapout(tp->t_bufp);
X#else
X	if (copyout(tp->t_bufp->b_un.b_addr, u.u_base, (unsigned)i)) {
X		u.u_error = EFAULT;
X		return (-1);
X	};
X#endif
X	u.u_count -= i;
X	u.u_base += i;
X	u.u_offset += i;
X#ifndef NOKA5
X	tp->t_cp = (char *)mapin(tp->t_bufp);
X	mapout(tp->t_bufp);
X#else
X	tp->t_cp = (char *)tp->t_bufp->b_un.b_addr;
X#endif
X	tp->t_inbuf = 0;
X	tp->t_rec = 0;
X	DBG_printf("bkrd: bp %o cp %o\n",tp->t_bufp,tp->t_cp);
X	return (0);
X}
X
X/*
X * Low level character input routine.
X * Stuff the character in the buffer, and wake up the top
X * half after setting t_rec if this completes the record
X * or if the buffer is (ick!) full.
X *
X * This is where the formatting should get done to allow
X * 8 character data paths through escapes.
X *
X * This routine should be expanded in-line in the receiver
X * interrupt routine of the dh-11 to make it run as fast as possible.
X */
X
Xbkinput(c, tp)
Xregister c;
Xregister struct tty *tp;
X{
X#ifndef NOKA5
X	segm save5;
X	extern struct buf *hasmap;
X	struct buf *oldmap;
X
X	if (tp->t_rec)
X		return;
X	saveseg5(save5);
X	oldmap = hasmap;
X	if( hasmap != (struct buf *)NULL)
X		mapout(hasmap);
X	mapin(tp->t_bufp);
X	*tp->t_cp++ = c;
X	mapout(tp->t_bufp);
X	if(oldmap != (struct buf *)NULL)
X		mapin(oldmap);
X	restorseg5(save5);
X#else
X	if (tp->t_rec)
X		return;
X	*tp->t_cp++ = c;
X#endif
X	if (++tp->t_inbuf == BSIZE || c == '\n') {
X		DBG_printf("bkip: bp %o cp %o\n",tp->t_bufp,tp->t_cp);
X		tp->t_rec = 1;
X		wakeup((caddr_t)&tp->t_bufp);
X	}
X}
X
X/*
X * This routine is called whenever a ioctl is about to be performed
X * and gets a chance to reject the ioctl.  We reject all teletype
X * oriented ioctl's except those which set the discipline, and
X * those which get parameters (gtty and get special characters).
X */
X/*ARGSUSED*/
Xbkioctl(tp, cmd, addr)
Xstruct tty *tp;
Xcaddr_t addr;
X{
X
X	if ((cmd>>8) != 't')
X		return (cmd);
X	switch (cmd) {
X
X	case TIOCSETD:
X	case TIOCGETD:
X	case TIOCGETP:
X	case TIOCGETC:
X	return (cmd);
X	}
X	u.u_error = ENOTTY;
X	return (0);
X}
X#endif UCB_NTTY
X#endif NBK
+ END-OF-FILE dev/bk.c
chmod 'u=rw,g=r,o=r' 'dev/bk.c'
echo '	-rw-r--r-- 1 root     5815 Oct  9 22:27 dev/bk.c        (as sent)'
echo -n '	'
/bin/ls -l dev/bk.c
echo 'Extracting c.c'
sed 's/^X//' > c.c << '+ END-OF-FILE c.c'
X/*
X *	SCCS id	%W% (Berkeley)	%G%
X */
X
X#include	"param.h"
X#include	<sys/systm.h>
X#include	<sys/buf.h>
X#include	<sys/tty.h>
X#include	<sys/conf.h>
X#include	<sys/proc.h>
X#include	<sys/text.h>
X#include	<sys/dir.h>
X#include	<sys/user.h>
X#include	<sys/file.h>
X#include	<sys/inode.h>
X#include	<sys/acct.h>
X#include	<sys/map.h>
X#include	<sys/filsys.h>
X#include	<sys/mount.h>
X
X
Xint	nulldev();
Xint	nodev();
Xint	nullioctl();
X
X
X#include	"dh.h"
X#if	NDH > 0
Xint	dhopen(), dhclose(), dhread(), dhwrite(), dhioctl(), dhstop();
Xextern	struct	tty	dh11[];
X#else
X#define	dhopen		nodev
X#define	dhclose		nodev
X#define	dhread		nodev
X#define	dhwrite		nodev
X#define	dhioctl		nodev
X#define	dhstop		nodev
X#define	dh11		((struct tty *) NULL)
X#endif	NDH
X
X#include	"dn.h"
X#if	NDN > 0
Xint	dnopen(), dnclose(), dnwrite();
X#else
X#define	dnopen		nodev
X#define	dnclose		nodev
X#define	dnwrite		nodev
X#endif	NDN
X
X#include	"dz.h"
X#if	NDZ > 0
Xint	dzopen(), dzclose(), dzread(), dzwrite(), dzioctl();
X#ifdef	DZ_PDMA
Xint	dzstop();
X#else
X#define	dzstop		nulldev
X#endif
Xextern	struct	tty	dz11[];
X#else
X#define	dzopen		nodev
X#define	dzclose		nodev
X#define	dzread		nodev
X#define	dzwrite		nodev
X#define	dzioctl		nodev
X#define dzstop		nodev
X#define	dz11		((struct tty *) NULL)
X#endif	NDZ
X
X#include	"hk.h"
X#if	NHK > 0
Xint	hkstrategy(), hkread(), hkwrite(), hkroot();
Xextern	struct	buf	hktab;
X#define	hkopen		nulldev
X#define	hkclose		nulldev
X#define	_hktab		&hktab
X#else
X#define	hkopen		nodev
X#define	hkclose		nodev
X#define	hkstrategy	nodev
X#define	hkread		nodev
X#define	hkwrite		nodev
X#define	hkroot		nulldev
X#define	_hktab		((struct buf *) NULL)
X#endif	NHK
X
X#include	"hp.h"
X#if	NHP > 0
Xint	hpstrategy(), hpread(), hpwrite(), hproot();
Xextern	struct	buf	hptab;
X#define	hpopen		nulldev
X#define	hpclose		nulldev
X#define	_hptab		&hptab
X#else
X#define	hpopen		nodev
X#define	hpclose		nodev
X#define	hproot		nulldev
X#define	hpstrategy	nodev
X#define	hpread		nodev
X#define	hpwrite		nodev
X#define	_hptab		((struct buf *) NULL)
X#endif	NHP
X
X#include	"hs.h"
X#if	NHS > 0
Xint	hsstrategy(), hsread(), hswrite(), hsroot();
Xextern	struct	buf	hstab;
X#define	_hstab		&hstab
X#define	hsopen		nulldev
X#define	hsclose		nulldev
X#else
X#define	hsopen		nodev
X#define	hsclose		nodev
X#define	hsstrategy	nodev
X#define	hsread		nodev
X#define	hswrite		nodev
X#define	hsroot		nulldev
X#define	_hstab		((struct buf *) NULL)
X#endif	NHS
X
X#include	"ht.h"
X#if	NHT > 0
Xint	htopen(), htclose(), htread(), htwrite(), htstrategy();
X#ifdef	HT_IOCTL
Xint	htioctl();
X#else
X#define	htioctl		nodev
X#endif
Xextern	struct	buf	httab;
X#define	_httab		&httab
X#else
X#define	htopen		nodev
X#define	htclose		nodev
X#define	htread		nodev
X#define	htwrite		nodev
X#define	htioctl		nodev
X#define	htstrategy	nodev
X#define	_httab		((struct buf *) NULL)
X#endif	NHT
X
X#include	"lp.h"
X#if	NLP > 0
Xint	lpopen(), lpclose(), lpwrite();
X#else
X#define	lpopen		nodev
X#define	lpclose		nodev
X#define	lpwrite		nodev
X#endif	NLP
X
X#include	"rk.h"
X#if	NRK > 0
Xint	rkstrategy(), rkread(), rkwrite();
Xextern	struct	buf	rktab;
X#define	rkopen		nulldev
X#define	rkclose		nulldev
X#define	_rktab		&rktab
X#else
X#define	rkopen		nodev
X#define	rkclose		nodev
X#define	rkstrategy	nodev
X#define	rkread		nodev
X#define	rkwrite		nodev
X#define	_rktab		((struct buf *) NULL)
X#endif	NRK
X
X#include	"rl.h"
X#if	NRL > 0
Xint	rlstrategy(), rlread(), rlwrite();
Xextern	struct	buf	rltab;
X#define	rlopen		nulldev
X#define	rlclose		nulldev
X#define	_rltab		&rltab
X#else
X#define	rlopen		nodev
X#define	rlclose		nodev
X#define	rlstrategy	nodev
X#define	rlread		nodev
X#define	rlwrite		nodev
X#define	_rltab		((struct buf *) NULL)
X#endif	NRL
X
X#include	"rm.h"
X#if	NRM > 0
Xint	rmstrategy(), rmread(), rmwrite(), rmroot();
Xextern	struct	buf	rmtab;
X#define	rmopen		nulldev
X#define	rmclose		nulldev
X#define	_rmtab		&rmtab
X#else
X#define	rmopen		nodev
X#define	rmclose		nodev
X#define	rmroot		nulldev
X#define	rmstrategy	nodev
X#define	rmread		nodev
X#define	rmwrite		nodev
X#define	_rmtab		((struct buf *) NULL)
X#endif	NRM
X
X#include	"rp.h"
X#if	NRP > 0
Xint	rpstrategy(), rpread(), rpwrite();
Xextern	struct	buf	rptab;
X#define	rpopen		nulldev
X#define	rpclose		nulldev
X#define	_rptab		&rptab
X#else
X#define	rpopen		nodev
X#define	rpclose		nodev
X#define	rpstrategy	nodev
X#define	rpread		nodev
X#define	rpwrite		nodev
X#define	_rptab		((struct buf *) NULL)
X#endif	NRP
X
X#include	"tm.h"
X#if	NTM > 0
Xint	tmopen(), tmclose(), tmread(), tmwrite(), tmstrategy();
X#ifdef	TM_IOCTL
Xint	tmioctl();
X#else
X#define	tmioctl		nodev
X#endif
Xextern	struct	buf	tmtab;
X#define	_tmtab		&tmtab
X#else
X#define	tmopen		nodev
X#define	tmclose		nodev
X#define	tmread		nodev
X#define	tmwrite		nodev
X#define	tmioctl		nodev
X#define	tmstrategy	nodev
X#define	_tmtab		((struct buf *) NULL)
X#endif	NTM
X
X#include	"ts.h"
X#if	NTS > 0
Xint	tsopen(), tsclose(), tsread(), tswrite(), tsstrategy();
X#ifdef	TS_IOCTL
Xint	tsioctl();
X#else
X#define	tsioctl		nodev
X#endif
Xextern	struct	buf	tstab;
X#define	_tstab		&tstab
X#else
X#define	tsopen		nodev
X#define	tsclose		nodev
X#define	tsread		nodev
X#define	tswrite		nodev
X#define	tsioctl		nodev
X#define	tsstrategy	nodev
X#define	_tstab		((struct buf *) NULL)
X#endif	NTS
X
X#include	"vp.h"
X#if	NVP > 0
Xint	vpopen(), vpclose(), vpwrite(), vpioctl();
X#else
X#define	vpopen		nodev
X#define	vpclose		nodev
X#define	vpwrite		nodev
X#define vpioctl		nodev
X#endif	NVP
X
X#include	"xp.h"
X#if	NXP > 0
Xint	xpstrategy(), xpread(), xpwrite(), xproot();
Xextern	struct	buf	xptab;
X#define	xpopen		nulldev
X#define	xpclose		nulldev
X#define	_xptab		&xptab
X#else
X#define	xpopen		nodev
X#define	xpclose		nodev
X#define	xproot		nulldev
X#define	xpstrategy	nodev
X#define	xpread		nodev
X#define	xpwrite		nodev
X#define	_xptab		((struct buf *) NULL)
X#endif	NXP
X
Xstruct	bdevsw	bdevsw[] =
X{
X	rkopen,		rkclose,	rkstrategy,
X	nulldev,	_rktab,		/* rk = 0 */
X
X	rpopen,		rpclose,	rpstrategy,
X	nulldev,	_rptab,		/* rp = 1 */
X
X	nodev,		nodev,		nodev,
X	nulldev,	0,		/* rf = 2 */
X
X	tmopen,		tmclose,	tmstrategy,
X	nulldev,	_tmtab,		/* tm = 3 */
X
X	hkopen,		hkclose,	hkstrategy,
X	hkroot,		_hktab,		/* hk = 4 */
X
X	hsopen,		hsclose,	hsstrategy,
X	hsroot,		_hstab,		/* hs = 5 */
X
X#if	NXP > 0
X	xpopen,		xpclose,	xpstrategy,
X	xproot,		_xptab,		/* xp = 6 */
X#else
X
X#if	NHP > 0
X	hpopen,		hpclose,	hpstrategy,
X	hproot,		_hptab,		/* hp = 6 */
X#else
X
X	rmopen,		rmclose,	rmstrategy,
X	rmroot,		_rmtab,		/* rm = 6 */
X#endif
X#endif
X
X	htopen,		htclose,	htstrategy,
X	nulldev,	_httab,		/* ht = 7 */
X
X	rlopen,		rlclose,	rlstrategy,
X	nulldev,	_rltab,		/* rl = 8 */
X
X	tsopen,		tsclose,	tsstrategy,
X	nulldev,	_tstab,		/* ts = 9 */
X};
Xint	nblkdev = sizeof(bdevsw) / sizeof(bdevsw[0]);
X
Xint	klopen(), klclose(), klread(), klwrite(), klioctl();
Xextern	struct	tty	kl11[];
Xint	mmread(), mmwrite();
Xint	syopen(), syread(), sywrite(), sysioctl();
X
X#include "ft.h"
X#if NFT > 0
Xint	ftopen(), ftclose(), ftioctl();
X#else
X#define ftopen	nodev
X#define	ftclose	nodev
X#define	ftioctl	nodev
X#endif
X
X#include "ib.h"
X#if NIB > 0
Xint	ibopen(), ibclose(), ibread(), ibwrite(), ibioctl();
X#else
X#define ibopen	nodev
X#define ibclose	nodev
X#define ibread	nodev
X#define ibwrite	nodev
X#define ibioctl	nodev
X#endif
X
X#include "mq.h"
X#if NMQ > 0
Xint	mqopen(), mqclose(), mqread(), mqwrite();
X#else
X#define mqopen	nodev
X#define mqclose	nodev
X#define mqread	nodev
X#define mqwrite	nodev
X#endif
X
Xstruct	cdevsw	cdevsw[] =
X{
X	klopen,		klclose,	klread,		klwrite,
X	klioctl,	nulldev,	kl11,		/* kl = 0 */
X
X	nodev,		nodev,		nodev,		nodev,
X	nodev,		nodev,		0,		/* pc = 1 */
X
X	vpopen,		vpclose,	nodev,		vpwrite,
X	vpioctl,	nulldev,	0,		/* vp = 2 */
X
X	lpopen,		lpclose,	nodev,		lpwrite,
X	nodev,		nulldev,	0,		/* lp = 3 */
X
X	dhopen,		dhclose,	dhread,		dhwrite,
X	dhioctl,	dhstop,		dh11,		/* dh = 4 */
X
X	nodev,		nodev,		nodev,		nodev,
X	nodev,		nodev,		0,		/* dp = 5 */
X
X	nodev,		nodev,		nodev,		nodev,
X	nodev,		nodev,		0,		/* dj = 6 */
X
X	dnopen,		dnclose,	nodev,		dnwrite,
X	nodev,		nulldev,	0,		/* dn = 7 */
X
X	nulldev,	nulldev,	mmread,		mmwrite,
X	nodev,		nulldev,	0,		/* mem = 8 */
X
X	rkopen,		rkclose,	rkread,		rkwrite,
X	nodev,		nulldev,	0,		/* rk = 9 */
X
X	nodev,		nodev,		nodev,		nodev,
X	nodev,		nodev,		0,		/* rf = 10 */
X
X	rpopen,		rpclose,	rpread,		rpwrite,
X	nodev,		nulldev,	0,		/* rp = 11 */
X
X	tmopen,		tmclose,	tmread,		tmwrite,
X	tmioctl,	nulldev,	0,		/* tm = 12 */
X
X	hsopen,		hsclose,	hsread,		hswrite,
X	nodev,		nulldev,	0,		/* hs = 13 */
X
X#if	NXP > 0
X	xpopen,		xpclose,	xpread,		xpwrite,
X	nodev,		nulldev,	0,		/* xp = 14 */
X#else
X#if	NHP > 0
X
X	hpopen,		hpclose,	hpread,		hpwrite,
X	nodev,		nulldev,	0,		/* hp = 14 */
X#else
X
X	rmopen,		rmclose,	rmread,		rmwrite,
X	nodev,		nulldev,	0,		/* rm = 14 */
X#endif
X#endif
X
X	htopen,		htclose,	htread,		htwrite,
X	htioctl,	nulldev,	0,		/* ht = 15 */
X
X	nodev,		nodev,		nodev,		nodev,
X	nodev,		nodev,		0,		/* du = 16 */
X
X	syopen,		nulldev,	syread,		sywrite,
X	sysioctl,	nulldev,	0,		/* tty = 17 */
X
X	rlopen,		rlclose,	rlread,		rlwrite,
X	nodev,		nulldev,	0,		/* rl = 18 */
X
X	hkopen,		hkclose,	hkread,		hkwrite,
X	nodev,		nulldev,	0,		/* hk = 19 */
X
X	tsopen,		tsclose,	tsread,		tswrite,
X	tsioctl,	nulldev,	0,		/* ts = 20 */
X
X	dzopen,		dzclose,	dzread,		dzwrite,
X	dzioctl,	dzstop,		dz11,		/* dz = 21 */
X
X	ibopen,		ibclose,	ibread,		ibwrite,
X	ibioctl,	nulldev,	0,		/* ib = 22 */
X
X	ftopen,		ftclose,	nodev,		nodev,
X	ftioctl,	nodev,		0,		/* ft = 23 */
X
X	mqopen,		mqclose,	mqread,		mqwrite,
X	nodev,		nodev,		0		/* mq = 24 */
X};
X
Xint	nchrdev = sizeof(cdevsw) / sizeof(cdevsw[0]);
X
X#ifdef	OLDTTY
Xint	ttread(), ttyinput(), ttyoutput();
Xcaddr_t	ttwrite();
X#define	ttopen		nulldev
X#define	ttclose		nulldev
X#define	ttioctl		nullioctl
X#define	ttmodem		nulldev
X#else
X#define	ttopen		nodev
X#define	ttclose		nodev
X#define	ttread		nodev
X#define	ttwrite		nodev
X#define	ttioctl		nodev
X#define	ttyinput	nodev
X#define	ttyoutput	nodev
X#define	ttmodem		nodev
X#endif
X
X
X#ifdef	UCB_NTTY
Xint	ntyopen(), ntyclose(), ntread(), ntyinput(), ntyoutput();
Xcaddr_t	ntwrite();
X#define	ntyioctl	nullioctl
X#define	ntymodem	nulldev
X#else
X#define	ntyopen		nodev
X#define	ntyclose	nodev
X#define	ntread		nodev
X#define	ntwrite		nodev
X#define	ntyioctl	nodev
X#define	ntyinput	nodev
X#define	ntyoutput	nodev
X#define	ntymodem	nodev
X
X#endif
X#include	"bk.h"
X#if	NBK > 0
Xint	bkopen(), bkclose(), bkread(), bkioctl(), bkinput();
X#else
X#define	bkopen		nodev
X#define	bkclose		nodev
X#define	bkread		nodev
X#define	bkioctl		nodev
X#define	bkinput		nodev
X#endif	
X
Xstruct	linesw linesw[] =
X{
X	ttopen,		ttclose,	ttread,		ttwrite,
X	ttioctl,	ttyinput,	ttyoutput,	ttmodem,	/*0*/
X
X	ntyopen,	ntyclose,	ntread,		ntwrite,
X	ntyioctl,	ntyinput,	ntyoutput,	ntymodem,	/*1*/
X
X	bkopen,		bkclose,	bkread,		ntwrite,
X	bkioctl,	bkinput,	ntyoutput,	ntymodem	/*2*/
X};
X
X#ifndef	MPX_FILS
Xint	nldisp	= sizeof(linesw) / sizeof(linesw[0]);
X#else
Xint	nldisp	= sizeof(linesw) / sizeof(linesw[0]) - 1;
Xint	mpxchan();
Xint	(*ldmpx)()	= mpxchan;
X#endif
+ END-OF-FILE c.c
chmod 'u=rw,g=r,o=r' 'c.c'
echo '	-rw-r--r-- 1 root    10672 Oct  9 22:27 c.c        (as sent)'
echo -n '	'
/bin/ls -l c.c
exit 0