ttycntl.c,v

来自「TCP-IP红宝书源代码」· C,V 代码 · 共 178 行

head	1.4;
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	dls:1.4; strict;
comment	@ * @;


1.4
date	97.09.21.19.30.23;	author dls;	state Dist;
branches;
next	1.3;

1.3
date	94.08.21.04.29.51;	author dls;	state Fix;
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next	1.2;

1.2
date	94.08.12.01.30.26;	author dls;	state Works;
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next	1.1;

1.1
date	94.05.08.06.01.42;	author dls;	state Old;
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next	;


desc
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1.4
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@pre-3e code
@
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@/* ttycntl.c - ttycntl */

#include <conf.h>
#include <kernel.h>
#include <tty.h>

/*------------------------------------------------------------------------
 * ttycntl - control function for TTY pseudo devices
 *------------------------------------------------------------------------
 */
int
ttycntl(pdev, func, arg1, arg2)
struct devsw	*pdev;
int		func;
char		*arg1, *arg2;
{
	struct tty	*ptty = (struct tty *)pdev->dvioblk;
	unsigned char	ch;
	STATWORD	PS;

	switch (func) {
	case TTC_CPID:	ptty->tty_cpid = (int) arg1;
			return OK;
	case TTC_SYNC:	if (arg1)
				ptty->tty_oflags |= TOF_SYNC;
			else
				ptty->tty_oflags &= ~TOF_SYNC;
			return OK;
	case TTC_GIF:	return ptty->tty_iflags;
	case TTC_GOF:	return ptty->tty_oflags;
	case TTC_NEXTC:
			disable(PS);
			wait(ptty->tty_isema);
			ch = ptty->tty_in[ptty->tty_istart];
			signal(ptty->tty_isema);
			restore(PS);
			return ch;
	case TTC_SUSER:
			ptty->tty_uid = (int) arg1;
			gettime(&ptty->tty_ltime);
			ptty->tty_ctime = ptty->tty_ltime;
			return OK;
	case TTC_CUSER:
			ptty->tty_uid = -1;
			return OK;
	}
	return SYSERR;
}
@


1.3
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@added TTC_NEXTC
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1.2
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@*** empty log message ***
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1.1
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@Initial revision
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@a5 2
#include <io.h>
#include <slu.h>
d8 1
a8 1
 *  ttycntl  -  control a tty device by setting modes
d11 5
a15 3
ttycntl(devptr, func)
struct	devsw	*devptr;
int func;
d17 12
a28 47
	STATWORD ps;    
	register struct	tty *ttyp;
	char	ch;
	
	ttyp = &tty[devptr->dvminor];
	switch ( func )	{
	case TCSETBRK:
	        return(SYSERR);
		/* ORIG: ttyp->ioaddr->ctstat |= SLUTBREAK; */
		break;
	case TCRSTBRK:
		return(SYSERR);
		/* ORIG: ttyp->ioaddr->ctstat &= ~SLUTBREAK; */
		break;
	case TCNEXTC:
		disable(ps);
		wait(ttyp->isem);
		ch = ttyp->ibuff[ttyp->itail];
		restore(ps);
		signal(ttyp->isem);
		return(ch);
	case TCMODER:
		ttyp->imode = IMRAW;
		break;
	case TCMODEC:
		ttyp->imode = IMCOOKED;
		break;
	case TCMODEK:
		ttyp->imode = IMCBREAK;
		break;
	case TCECHO:
		ttyp->iecho = TRUE;
		break;
	case TCNOECHO:
		ttyp->iecho = FALSE;
		break;
	case TCICHARS:
		return(ttyp->icnt);
	case TCINT:
		ttyp->iintr = TRUE;
		ttyp->iintpid = getpid();
		break;
	case TCNOINT:
		ttyp->iintr = FALSE;
		break;
	default:
		return(SYSERR);
d30 1
a30 1
	return(OK);
@