*** h/ioctl.h.old	Tue May 23 14:50:42 1989
--- h/ioctl.h	Tue Aug 29 18:24:49 1989
***************
*** 214,219 ****
--- 214,220 ----
  #define		TIOCPKT_START		0x08	/* start output */
  #define		TIOCPKT_NOSTOP		0x10	/* no more ^S, ^Q */
  #define		TIOCPKT_DOSTOP		0x20	/* now do ^S ^Q */
+ #define		TIOCPKT_IOCTL		0x40	/* state change of pty driver */
  #define	TIOCSTOP	_IO('t', 111)		/* stop output, like ^S */
  #define	TIOCSTART	_IO('t', 110)		/* start output, like ^Q */
  #define	TIOCMSET	_IOW('t', 109, int)	/* set all modem bits */
***************
*** 226,231 ****
--- 227,235 ----
  #define	TIOCUCNTL	_IOW('t', 102, int)	/* pty: set/clr usr cntl mode */
  #define		UIOCCMD(n)	_IO('u', n)		/* usr cntl op "n" */
  #define	TIOCCONS	_IO('t', 98)		/* become virtual console */
+ #define	TIOCEXT		_IOW('t', 97, int)	/* pty: external processing */
+ #define	TIOCGSTATE	_IOR('t', 96, int)	/* pty: get internal state */
+ #define	TIOCSIG		_IO('t', 95)		/* pty: generate signal */
  
  #define	OTTYDISC	0		/* old, v7 std tty driver */
  #define	NETLDISC	1		/* line discip for berk net */
*** h/tty.h.old	Tue May 23 14:51:01 1989
--- h/tty.h	Wed Aug 23 11:30:40 1989
***************
*** 70,75 ****
--- 70,76 ----
  	struct	ttychars t_chars;	/* tty */
  	struct	winsize t_winsize;	/* window size */
  /* be careful of tchars & co. */
+ #ifndef	NO_T_CHARS_DEFINES
  #define	t_erase		t_chars.tc_erase
  #define	t_kill		t_chars.tc_kill
  #define	t_intrc		t_chars.tc_intrc
***************
*** 84,89 ****
--- 85,91 ----
  #define	t_flushc	t_chars.tc_flushc
  #define	t_werasc	t_chars.tc_werasc
  #define	t_lnextc	t_chars.tc_lnextc
+ #endif
  };
  
  #define	TTIPRI	28
***************
*** 124,129 ****
--- 126,132 ----
  #define	TS_LNCH		0x080000	/* next character is literal */
  #define	TS_TYPEN	0x100000	/* retyping suspended input (PENDIN) */
  #define	TS_CNTTB	0x200000	/* counting tab width; leave FLUSHO alone */
+ #define	TS_EXTPROC	0x400000	/* external processing of data */
  
  #define	TS_LOCAL	(TS_BKSL|TS_QUOT|TS_ERASE|TS_LNCH|TS_TYPEN|TS_CNTTB)
  
*** sys/tty.c.old	Tue May 23 14:52:28 1989
--- sys/tty.c	Thu Aug 24 09:31:49 1989
***************
*** 275,280 ****
--- 275,285 ----
  	 */
  	switch (com) {
  
+ 	/* get internal state - needed for TS_EXTPROC bit */
+ 	case TIOCGSTATE:
+ 		*(int *)data = tp->t_state;
+ 		break;
+ 
  	/* get discipline number */
  	case TIOCGETD:
  		*(int *)data = tp->t_line;
***************
*** 752,757 ****
--- 757,763 ----
  	 */
  	if ((tp->t_state&TS_TYPEN) == 0 && (t_flags&PASS8) == 0)
  		c &= 0177;
+     if ((tp->t_state&TS_EXTPROC) == 0) {
  	/*
  	 * Check for literal nexting very first
  	 */
***************
*** 834,839 ****
--- 840,846 ----
  		else if (c == '\\')
  			tp->t_state |= TS_BKSL;
  	}
+     }
  
  	/*
  	 * Cbreak mode, don't process line editing
***************
*** 851,856 ****
--- 858,864 ----
  		goto endcase;
  	}
  
+     if ((tp->t_state&TS_EXTPROC) == 0) {
  	/*
  	 * From here on down cooked mode character
  	 * processing takes place.
***************
*** 911,916 ****
--- 919,925 ----
  			goto endcase;
  		}
  	}
+     }
  
  	/*
  	 * Check for input buffer overflow
***************
*** 933,938 ****
--- 942,948 ----
  		} else if (tp->t_rocount++ == 0)
  			tp->t_rocol = tp->t_col;
  		tp->t_state &= ~TS_QUOT;
+ 	    if ((tp->t_state&TS_EXTPROC) == 0) {
  		if (c == '\\')
  			tp->t_state |= TS_QUOT;
  		if (tp->t_state&TS_ERASE) {
***************
*** 948,953 ****
--- 958,964 ----
  				i--;
  			}
  		}
+ 	    }
  	}
  endcase:
  	/*
***************
*** 998,1005 ****
  		return (-1);
  	/*
  	 * Turn tabs to spaces as required
  	 */
! 	if (c == '\t' && (tp->t_flags&TBDELAY) == XTABS) {
  		register int s;
  
  		c = 8 - (tp->t_col&7);
--- 1009,1022 ----
  		return (-1);
  	/*
  	 * Turn tabs to spaces as required
+ 	 *
+ 	 * Special case if we have external processing, we don't
+ 	 * do the tab expansion because we'll probably get it
+ 	 * wrong.  If tab expansion needs to be done, let it
+ 	 * happen externally.
  	 */
! 	if ((tp->t_state&TS_EXTPROC) == 0 &&
! 	    c == '\t' && (tp->t_flags&TBDELAY) == XTABS) {
  		register int s;
  
  		c = 8 - (tp->t_col&7);
***************
*** 1497,1503 ****
  	int s;
  	char *nextc();
  
! 	if ((tp->t_flags&ECHO) == 0)
  		return;
  	tp->t_flags &= ~FLUSHO;
  	c &= 0377;
--- 1514,1520 ----
  	int s;
  	char *nextc();
  
! 	if ((tp->t_flags&ECHO) == 0 || (tp->t_state&TS_EXTPROC))
  		return;
  	tp->t_flags &= ~FLUSHO;
  	c &= 0377;
***************
*** 1618,1624 ****
  
  	if ((tp->t_state&TS_CNTTB) == 0)
  		tp->t_flags &= ~FLUSHO;
! 	if ((tp->t_flags&ECHO) == 0)
  		return;
  	c &= 0377;
  	if (tp->t_flags&RAW) {
--- 1635,1641 ----
  
  	if ((tp->t_state&TS_CNTTB) == 0)
  		tp->t_flags &= ~FLUSHO;
! 	if ((tp->t_flags&ECHO) == 0 || (tp->t_state&TS_EXTPROC))
  		return;
  	c &= 0377;
  	if (tp->t_flags&RAW) {
*** sys/tty_pty.c.old	Tue May 23 14:52:43 1989
--- sys/tty_pty.c	Tue Aug 29 18:48:36 1989
***************
*** 208,213 ****
--- 208,214 ----
  		return (EIO);
  	tp->t_oproc = ptsstart;
  	(void)(*linesw[tp->t_line].l_modem)(tp, 1);
+ 	tp->t_state &= ~TS_EXTPROC;
  	pti = &pt_ioctl[minor(dev)];
  	pti->pt_flags = 0;
  	pti->pt_send = 0;
***************
*** 247,252 ****
--- 248,275 ----
  				error = ureadc((int)pti->pt_send, uio);
  				if (error)
  					return (error);
+ 				if (pti->pt_send & TIOCPKT_IOCTL) {
+ 					struct xx {
+ 						struct sgttyb a;
+ 						struct tchars b;
+ 						struct ltchars c;
+ 						int d;
+ 						int e;
+ 					} cb;
+ 					cb.a.sg_ispeed = tp->t_ispeed;
+ 					cb.a.sg_ospeed = tp->t_ospeed;
+ 					cb.a.sg_erase = tp->t_erase;
+ 					cb.a.sg_kill = tp->t_kill;
+ 					cb.a.sg_flags = tp->t_flags;
+ 					bcopy((caddr_t)&tp->t_intrc,
+ 					      (caddr_t)&cb.b, sizeof(cb.b));
+ 					bcopy((caddr_t)&tp->t_suspc,
+ 					      (caddr_t)&cb.c, sizeof(cb.c));
+ 					cb.d = tp->t_state;
+ 					cb.e = ((unsigned)tp->t_flags)>>16;
+ 					cc = MIN(uio->uio_resid, sizeof(cb));
+ 					uiomove(&cb, cc, UIO_READ, uio);
+ 				}
  				pti->pt_send = 0;
  				return (0);
  			}
***************
*** 483,488 ****
--- 506,533 ----
  	 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG.
  	 * ttywflush(tp) will hang if there are characters in the outq.
  	 */
+ 	if (cmd == TIOCEXT) {
+ 		/*
+ 		 * When the TS_EXTPROC bit is being toggled, we need
+ 		 * to send an TIOCPKT_IOCTL if the packet driver
+ 		 * is turned on.
+ 		 */
+ 		if (*(int *)data) {
+ 			if (pti->pt_flags & PF_PKT) {
+ 				pti->pt_send |= TIOCPKT_IOCTL;
+ 				ptcwakeup(tp);
+ 			}
+ 			tp->t_state |= TS_EXTPROC;
+ 		} else {
+ 			if ((tp->t_state & TS_EXTPROC) &&
+ 			    (pti->pt_flags & PF_PKT)) {
+ 				pti->pt_send |= TIOCPKT_IOCTL;
+ 				ptcwakeup(tp);
+ 			}
+ 			tp->t_state &= ~TS_EXTPROC;
+ 		}
+ 		return (0);
+ 	} else
  	if (cdevsw[major(dev)].d_open == ptcopen)
  		switch (cmd) {
  
***************
*** 525,530 ****
--- 570,583 ----
  			while (getc(&tp->t_outq) >= 0)
  				;
  			break;
+ 
+ 		case TIOCSIG:
+ 			if (*(unsigned int *)data >= NSIG)
+ 				return(EINVAL);
+ 			if ((tp->t_flags&NOFLSH) == 0)
+ 				ttyflush(tp, FREAD|FWRITE);
+ 			gsignal(tp->t_pgrp, *(unsigned int *)data);
+ 			return(0);
  		}
  	error = ttioctl(tp, cmd, data, flag);
  	/*
***************
*** 549,554 ****
--- 602,624 ----
  			return (0);
  		}
  		error = ENOTTY;
+ 	}
+ 	/*
+ 	 * If external processing and packet mode send ioctl packet.
+ 	 */
+ 	if ((tp->t_state & TS_EXTPROC) && (pti->pt_flags & PF_PKT)) {
+ 		switch(cmd) {
+ 		case TIOCSETP:
+ 		case TIOCSETN:
+ 		case TIOCSETC:
+ 		case TIOCSLTC:
+ 		case TIOCLBIS:
+ 		case TIOCLBIC:
+ 		case TIOCLSET:
+ 			pti->pt_send |= TIOCPKT_IOCTL;
+ 		default:
+ 			break;
+ 		}
  	}
  	stop = (tp->t_flags & RAW) == 0 &&
  	    tp->t_stopc == CTRL('s') && tp->t_startc == CTRL('q');