Import sources from 2011-03-30 iso image

9 files changed, 2296 insertions, 0 deletions

diff --git a/sys/src/cmd/vt/cons.h b/sys/src/cmd/vt/cons.h
new file mode 100755
index 000000000..436ef6366
--- /dev/null
+++ b/sys/src/cmd/vt/cons.h
@@ -0,0 +1,89 @@
+/*  console state (for consctl) */
+typedef struct Consstate	Consstate;
+struct Consstate{
+	int raw;
+	int hold;
+};
+
+extern Consstate*	consctl(void);
+extern Consstate*	cs;
+
+#define	XMARGIN	5	/* inset from border of layer */
+#define	YMARGIN	5
+#define	INSET	3
+#define	BUFS	32
+#define	HISTSIZ	4096	/* number of history characters */
+#define BSIZE	1000
+
+#define	SCROLL	2
+#define NEWLINE	1
+#define OTHER	0
+
+#define COOKED	0
+#define RAW	1
+
+/* text attributes */
+enum {
+	THighIntensity = (1<<0),
+	TUnderline = (1<<1),
+	TBlink = (1<<2),
+	TReverse = (1<<3),
+	TInvisible = (1<<4),
+};
+	
+
+#define	button2()	((mouse.buttons & 07)==2)
+#define	button3()	((mouse.buttons & 07)==4)
+
+struct ttystate {
+	int	crnl;
+	int	nlcr;
+};
+extern struct ttystate ttystate[];
+
+#define NKEYS 32	/* max key definitions */
+struct funckey {
+	char	*name;
+	char	*sequence;
+};
+extern struct funckey *fk;
+extern struct funckey vt100fk[], vt220fk[], ansifk[], xtermfk[];
+
+extern int	x, y, xmax, ymax, olines;
+extern int	peekc, attribute;
+extern char*	term;
+
+extern void	emulate(void);
+extern int	host_avail(void);
+extern void	clear(Rectangle);
+extern void	newline(void);
+extern int	get_next_char(void);
+extern void	ringbell(void);
+extern int	number(char *, int *);
+extern void	scroll(int,int,int,int);
+extern void	backup(int);
+extern void	sendnchars(int, char *);
+extern void	sendnchars2(int, char *);
+extern Point	pt(int, int);
+extern void	funckey(int);
+extern void	drawstring(Point, char*, int);
+
+extern int	debug;
+extern int	yscrmin, yscrmax;
+extern int	attr;
+extern int	defattr;
+
+extern Image *fgcolor;
+extern Image *bgcolor;
+extern Image *colors[];
+extern Image *hicolors[];
+extern Image *bgdefault;
+extern Image *fgdefault;
+
+extern int cursoron;
+extern int nocolor;
+
+extern void curson(int);
+extern void cursoff(void);
+extern void setdim(int, int);
+
diff --git a/sys/src/cmd/vt/consctl.c b/sys/src/cmd/vt/consctl.c
new file mode 100755
index 000000000..525bbb664
--- /dev/null
+++ b/sys/src/cmd/vt/consctl.c
@@ -0,0 +1,71 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include "cons.h"
+
+/*
+ *  bind a pipe onto consctl and keep reading it to
+ *  get changes to console state.
+ */
+Consstate*
+consctl(void)
+{
+	int i, n, fd, tries;
+	char buf[128];
+	Consstate *x;
+	char *field[10];
+
+	x = segattach(0, "shared", 0, sizeof *x);
+	if(x == (void*)-1)
+		sysfatal("segattach: %r");
+
+	/* a pipe to simulate consctl */
+	if(bind("#|", "/mnt/cons/consctl", MBEFORE) < 0
+	|| bind("/mnt/cons/consctl/data1", "/dev/consctl", MREPL) < 0)
+		sysfatal("bind consctl: %r");
+
+	/* a pipe to simulate the /dev/cons */
+	if(bind("#|", "/mnt/cons/cons", MREPL) < 0
+	|| bind("/mnt/cons/cons/data1", "/dev/cons", MREPL) < 0)
+		sysfatal("bind cons: %r");
+
+	switch(fork()){
+	case -1:
+		sysfatal("fork: %r");
+	case 0:
+		break;
+	default:
+		return x;
+	}
+
+	notify(0);
+
+	for(tries = 0; tries < 100; tries++){
+		x->raw = 0;
+		x->hold = 0;
+		fd = open("/mnt/cons/consctl/data", OREAD);
+		if(fd < 0)
+			break;
+		tries = 0;
+		for(;;){
+			n = read(fd, buf, sizeof(buf)-1);
+			if(n <= 0)
+				break;
+			buf[n] = 0;
+			n = getfields(buf, field, 10, 1, " ");
+			for(i = 0; i < n; i++){
+				if(strcmp(field[i], "rawon") == 0)
+					x->raw = 1;
+				else if(strcmp(field[i], "rawoff") == 0)
+					x->raw = 0;
+				else if(strcmp(field[i], "holdon") == 0)
+					x->hold = 1;
+				else if(strcmp(field[i], "holdoff") == 0)
+					x->hold = 0;
+			}
+		}
+		close(fd);
+	}
+	exits(0);
+	return 0;		/* dummy to keep compiler quiet*/
+}
diff --git a/sys/src/cmd/vt/event.c b/sys/src/cmd/vt/event.c
new file mode 100755
index 000000000..12f1f0e43
--- /dev/null
+++ b/sys/src/cmd/vt/event.c
@@ -0,0 +1,70 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <event.h>
+#include "cons.h"
+
+#define	BUFSIZ	4000
+
+extern int	outfd;
+
+int	hostpid;
+
+void
+edie(void)
+{
+	static int dead = 0;
+
+	if(dead++ > 0) return;
+	close(outfd);
+	postnote(PNGROUP, getpid(), "exit");
+}
+
+static int
+start_host(void)
+{
+	int	fd;
+
+	cs = consctl();
+
+	switch((hostpid = rfork(RFPROC|RFNAMEG|RFFDG|RFNOTEG))) {
+	case 0:
+		fd = open("/dev/cons", OREAD);
+		dup(fd,0);
+		if(fd != 0)
+			close(fd);
+		fd = open("/dev/cons", OWRITE);
+		dup(fd,1);
+		dup(fd,2);
+		if(fd != 1 && fd !=2)
+			close(fd);
+		execl("/bin/rc","rcX",nil);
+		fprint(2,"failed to start up rc\n");
+		_exits("rc");
+	case -1:
+		fprint(2,"rc startup: fork error\n");
+		_exits("rc_fork");
+	}
+
+	return open("/mnt/cons/cons/data", ORDWR);
+}
+
+void
+ebegin(int Ehost)
+{
+
+	atexit(edie);
+
+	einit(Emouse|Ekeyboard);
+
+	outfd = start_host();
+	if( estart(Ehost, outfd, BUFSIZ) != Ehost) {
+		exits("event init error");
+	}
+}
+
+void
+send_interrupt(void)
+{
+	postnote(PNGROUP, hostpid,"interrupt");
+}
diff --git a/sys/src/cmd/vt/event.h b/sys/src/cmd/vt/event.h
new file mode 100755
index 000000000..baa108623
--- /dev/null
+++ b/sys/src/cmd/vt/event.h
@@ -0,0 +1,13 @@
+#define BSIZE	4000
+#define MOUSE	0
+#define KBD	1
+#define	HOST	2
+#define HOST_BLOCKED	1
+#define KBD_BLOCKED	2
+
+typedef struct IOEvent {
+	short	key;
+	short	size;
+	uchar	data[BSIZE];
+} IOEvent;
+
diff --git a/sys/src/cmd/vt/hp.c b/sys/src/cmd/vt/hp.c
new file mode 100755
index 000000000..cfca3033e
--- /dev/null
+++ b/sys/src/cmd/vt/hp.c
@@ -0,0 +1,212 @@
+#include <u.h>
+#include <libc.h>
+#include <ndraw.h>
+#include <bio.h>
+#include "cons.h"
+
+char *term = "2621";
+
+struct funckey fk[32];
+
+void
+emulate(void)
+{
+	char buf[BUFS+1];
+	int n;
+	int c;
+	int standout = 0;
+	int insmode = 0;
+
+	for (;;) {
+		if (x > xmax || y > ymax) {
+			x = 0;
+			newline();
+		}
+		buf[0] = get_next_char();
+		buf[1] = '\0';
+		switch(buf[0]) {
+
+		case '\000':		/* nulls, just ignore 'em */
+			break;
+
+		case '\007':		/* bell */
+			ringbell();
+			break;
+
+		case '\t':		/* tab modulo 8 */
+			x = (x|7)+1;
+			break;
+
+		case '\033':
+			switch(get_next_char()) {
+
+			case 'j':
+				get_next_char();
+				break;
+
+			case '&':	/* position cursor &c */
+				switch(get_next_char()) {
+
+				case 'a':
+					for (;;) {
+						n = number(buf, nil);
+						switch(buf[0]) {
+
+						case 'r':
+						case 'y':
+							y = n;
+							continue;
+
+						case 'c':
+							x = n;
+							continue;
+
+						case 'R':
+						case 'Y':
+							y = n;
+							break;
+
+						case 'C':
+							x = n;
+							break;
+						}
+						break;
+					}
+					break;
+
+				case 'd':	/* underline stuff */
+					if ((n=get_next_char())>='A' && n <= 'O')
+						standout++;
+					else if (n == '@')
+						standout = 0;
+					break;
+
+				default:
+					get_next_char();
+					break;
+
+				}
+				break;
+
+			case 'i':	/* back tab */
+				if (x>0)
+					x = (x-1) & ~07;
+				break;
+
+			case 'H':	/* home cursor */
+			case 'h':
+				x = 0;
+				y = 0;
+				break;
+
+			case 'L':	/* insert blank line */
+				scroll(y, ymax, y+1, y);
+				break;
+
+			case 'M':	/* delete line */
+				scroll(y+1, ymax+1, y, ymax);
+				break;
+
+			case 'J':	/* clear to end of display */
+				xtipple(Rpt(pt(0, y+1),
+					    pt(xmax+1, ymax+1)));
+				/* flow */
+			case 'K':	/* clear to EOL */
+				xtipple(Rpt(pt(x, y),
+					    pt(xmax+1, y+1)));
+				break;
+
+			case 'P':	/* delete char */
+				bitblt(&screen, pt(x, y),
+					&screen, Rpt(pt(x+1, y),
+					pt(xmax+1, y+1)),
+				        S);
+				xtipple(Rpt(pt(xmax, y),
+					    pt(xmax+1, y+1)));
+				break;
+
+			case 'Q':	/* enter insert mode */
+				insmode++;
+				break;
+
+			case 'R':	/* leave insert mode */
+				insmode = 0;
+				break;
+
+			case 'S':	/* roll up */
+				scroll(1, ymax+1, 0, ymax);
+				break;
+
+			case 'T':
+				scroll(0, ymax, 1, 0);
+				break;
+
+			case 'A':	/* upline */
+			case 't':
+				if (y>0)
+					y--;
+				if (olines > 0)
+					olines--;
+				break;
+
+			case 'B':
+			case 'w':
+				y++;	/* downline */
+				break;
+
+			case 'C':	/* right */
+			case 'v':
+				x++;
+				break;
+
+			case 'D':	/* left */
+			case 'u':
+				x--;
+
+			}
+			break;
+
+		case '\b':		/* backspace */
+			if(x > 0)
+				--x;
+			break;
+
+		case '\n':		/* linefeed */
+			newline();
+			standout = 0;
+			if( ttystate[cs->raw].nlcr )
+				x = 0;
+			break;
+
+		case '\r':		/* carriage return */
+			x = 0;
+			standout = 0;
+			if( ttystate[cs->raw].crnl )
+				newline();
+			break;
+
+		default:		/* ordinary char */
+			n = 1;
+			c = 0;
+			while (!cs->raw && host_avail() && x+n<=xmax && n<BUFS
+			    && (c = get_next_char())>=' ' && c<'\177') {
+				buf[n++] = c;
+				c = 0;
+			}
+			buf[n] = 0;
+			if (insmode) {
+				bitblt(&screen, pt(x+n, y), &screen,
+					Rpt(pt(x, y), pt(xmax-n+1, y+1)), S);
+			}
+			xtipple(Rpt(pt(x,y), pt(x+n, y+1)));
+			string(&screen, pt(x, y), font, buf, DxorS);
+			if (standout)
+				rectf(&screen,
+				      Rpt(pt(x,y),pt(x+n,y+1)),
+				      DxorS);
+			x += n;
+			peekc = c;
+			break;
+		}
+	}
+}
diff --git a/sys/src/cmd/vt/main.c b/sys/src/cmd/vt/main.c
new file mode 100755
index 000000000..a342a8984
--- /dev/null
+++ b/sys/src/cmd/vt/main.c
@@ -0,0 +1,875 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <event.h>
+#include <bio.h>
+#include <keyboard.h>
+#include "cons.h"
+
+enum{
+	Ehost		= 4,
+};
+
+char	*menutext2[] = {
+	"backup",
+	"forward",
+	"reset",
+	"clear",
+	"send",
+	"page",
+	0
+};
+
+char	*menutext3[] = {
+	"24x80",
+	"crnl",
+	"nl",
+	"raw",
+	"exit",
+	0
+};
+
+/* variables associated with the screen */
+
+int	x, y;	/* character positions */
+char	*backp;
+int	backc;
+int	atend;
+int	nbacklines;
+int	xmax, ymax;
+int	blocked;
+int	resize_flag;
+int	pagemode;
+int	olines;
+int	peekc;
+int	cursoron = 1;
+Menu	menu2;
+Menu	menu3;
+char	*histp;
+char	hist[HISTSIZ];
+int	yscrmin, yscrmax;
+int	attr, defattr;
+int	wctlout;
+
+Image	*bordercol;
+Image	*cursback;
+Image	*colors[8];
+Image	*hicolors[8];
+Image	*red;
+Image	*fgcolor;
+Image	*bgcolor;
+Image	*fgdefault;
+Image	*bgdefault;
+
+uint rgbacolors[8] = {
+	0x000000FF,	/* black */
+	0xAA0000FF,	/* red */
+	0x00AA00FF,	/* green */
+	0xFF5500FF,	/* brown */
+	0x0000FFFF,	/* blue */
+	0xAA00AAFF,	/* purple */
+	0x00AAAAFF,	/* cyan */
+	0x7F7F7FFF,	/* white */
+};
+
+ulong rgbahicolors[8] = {
+	0x555555FF,	/* light black aka grey */
+	0xFF5555FF,	/* light red */
+	0x55FF55FF,	/* light green */
+	0xFFFF55FF,	/* light brown aka yellow */
+	0x5555FFFF,	/* light blue */
+	0xFF55FFFF,	/* light purple */
+	0x55FFFFFF,	/* light cyan */
+	0xFFFFFFFF,	/* light grey aka white */
+};
+
+/* terminal control */
+struct ttystate ttystate[2] = { {0, 1}, {0, 1} };
+
+int	NS;
+int	CW;
+Consstate *cs;
+Mouse	mouse;
+
+int	debug;
+int	nocolor;
+int	logfd = -1;
+int	outfd = -1;
+Biobuf	*snarffp = 0;
+
+char	*host_buf;
+char	*hostp;				/* input from host */
+int	host_bsize = 2*BSIZE;
+int	hostlength;			/* amount of input from host */
+char	echo_input[BSIZE];
+char	*echop = echo_input;		/* characters to echo, after canon */
+char	sendbuf[BSIZE];	/* hope you can't type ahead more than BSIZE chars */
+char	*sendp = sendbuf;
+
+char *term;
+struct funckey *fk;
+
+/* functions */
+void	initialize(int, char **);
+void	ebegin(int);
+int	waitchar(void);
+int	rcvchar(void);
+void	set_input(char *);
+void	set_host(Event *);
+void	bigscroll(void);
+void	readmenu(void);
+void	eresized(int);
+void	resize(void);
+void	send_interrupt(void);
+int	alnum(int);
+void	escapedump(int,uchar *,int);
+
+void
+main(int argc, char **argv)
+{
+	initialize(argc, argv);
+	emulate();
+}
+
+void
+usage(void)
+{
+	fprint(2, "usage: %s [-2abcx] [-f font] [-l logfile]\n", argv0);
+	exits("usage");
+}
+
+void
+initialize(int argc, char **argv)
+{
+	int i, blkbg;
+	char *fontname, *p;
+
+	rfork(RFNAMEG|RFNOTEG);
+
+	fontname = nil;
+	term = "vt100";
+	fk = vt100fk;
+	blkbg = nocolor = 0;
+	ARGBEGIN{
+	case '2':
+		term = "vt220";
+		fk = vt220fk;
+		break;
+	case 'a':
+		term = "ansi";
+		fk = ansifk;
+		break;
+	case 'b':
+		blkbg = 1;		/* e.g., for linux colored output */
+		break;
+	case 'c':
+		nocolor = 1;
+		break;
+	case 'f':
+		fontname = EARGF(usage());
+		break;
+	case 'l':
+		p = EARGF(usage());
+		logfd = create(p, OWRITE, 0666);
+		if(logfd < 0)
+			sysfatal("could not create log file: %s: %r", p);
+		break;
+	case 'x':
+		fk = xtermfk;
+		term = "xterm";
+		break;
+	default:
+		usage();
+		break;
+	}ARGEND;
+
+	host_buf = malloc(host_bsize);
+	hostp = host_buf;
+	hostlength = 0;
+
+	if(initdraw(0, fontname, term) < 0){
+		fprint(2, "%s: initdraw failed: %r\n", term);
+		exits("initdraw");
+	}
+	werrstr("");		/* clear spurious error messages */
+	ebegin(Ehost);
+
+	histp = hist;
+	menu2.item = menutext2;
+	menu3.item = menutext3;
+	pagemode = 0;
+	blocked = 0;
+	NS = font->height;
+	CW = stringwidth(font, "m");
+
+	red = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DRed);
+	bordercol = allocimage(display, Rect(0,0,1,1), screen->chan, 1, 0xCCCCCCCC);
+	cursback = allocimage(display, Rect(0, 0, CW+1, NS+1), screen->chan, 0, DNofill);
+
+	for(i=0; i<8; i++){
+		colors[i] = allocimage(display, Rect(0,0,1,1), screen->chan, 1,
+			rgbacolors[i]);
+		hicolors[i] = allocimage(display, Rect(0,0,1,1), screen->chan, 1,
+			rgbahicolors[i]);
+	}
+
+	bgdefault = (blkbg? display->black: display->white);
+	fgdefault = (blkbg? display->white: display->black);
+	bgcolor = bgdefault;
+	fgcolor = fgdefault;
+
+	resize();
+
+	if(argc > 0) {
+		sendnchars(strlen(argv[0]),argv[0]);
+		sendnchars(1,"\n");
+	}
+}
+
+void
+clear(Rectangle r)
+{
+	draw(screen, r, bgcolor, nil, ZP);
+}
+
+void
+newline(void)
+{
+	nbacklines--;
+	if(y >= yscrmax) {
+		y = yscrmax;
+		if(pagemode && olines >= yscrmax) {
+			blocked = 1;
+			return;
+		}
+		scroll(yscrmin+1, yscrmax+1, yscrmin, yscrmax);
+	} else
+		y++;
+	olines++;
+}
+
+void
+cursoff(void)
+{
+	draw(screen, Rpt(pt(x, y), addpt(pt(x, y), Pt(CW,NS))), 
+		cursback, nil, cursback->r.min);
+}
+
+void
+curson(int bl)
+{
+	Image *col;
+
+	if(!cursoron){
+		cursoff();
+		return;
+	}
+
+	draw(cursback, cursback->r, screen, nil, pt(x, y));
+	if(bl)
+		col = red;
+	else
+		col = bordercol;
+	border(screen, Rpt(pt(x, y), addpt(pt(x, y), Pt(CW,NS))), 2, col, ZP);
+}
+
+int
+get_next_char(void)
+{
+	int c = peekc;
+	uchar buf[1];
+	peekc = 0;
+	if(c > 0)
+		return(c);
+	while(c <= 0) {
+		if(backp) {
+			c = *backp;
+			if(c && nbacklines >= 0) {
+				backp++;
+				if(backp >= &hist[HISTSIZ])
+					backp = hist;
+				return(c);
+			}
+			backp = 0;
+		}
+		c = (uchar)waitchar();
+		if(c > 0 && logfd >= 0) {
+			buf[0] = c;
+			write(logfd, buf, 1);
+		}
+	}
+	*histp++ = c;
+	if(histp >= &hist[HISTSIZ])
+		histp = hist;
+	*histp = '\0';
+	return(c);
+}
+
+int
+canon(char *ep, int c)
+{
+	if(c&0200)
+		return(SCROLL);
+	switch(c) {
+		case '\b':
+			if(sendp > sendbuf)
+				sendp--;
+			*ep++ = '\b';
+			*ep++ = ' ';
+			*ep++ = '\b';
+			break;
+		case 0x15:	/* ^U line kill */
+			sendp = sendbuf;
+			*ep++ = '^';
+			*ep++ = 'U';
+			*ep++ = '\n';
+			break;
+		case 0x17:	/* ^W word kill */
+			while(sendp > sendbuf && !alnum(*sendp)) {
+				*ep++ = '\b';
+				*ep++ = ' ';
+				*ep++ = '\b';
+				sendp--;
+			}
+			while(sendp > sendbuf && alnum(*sendp)) {
+				*ep++ = '\b';
+				*ep++ = ' ';
+				*ep++ = '\b';
+				sendp--;
+			}
+			break;
+		case '\177':	/* interrupt */
+			sendp = sendbuf;
+			send_interrupt();
+			return(NEWLINE);
+		case '\021':	/* quit */
+		case '\r':
+		case '\n':
+			if(sendp < &sendbuf[512])
+				*sendp++ = '\n';
+			sendnchars((int)(sendp-sendbuf), sendbuf);
+			sendp = sendbuf;
+			if(c == '\n' || c == '\r') {
+				*ep++ = '\n';
+			}
+			*ep = 0;
+			return(NEWLINE);
+		case '\004':	/* EOT */
+			if(sendp == sendbuf) {
+				sendnchars(0,sendbuf);
+				*ep = 0;
+				return(NEWLINE);
+			}
+			/* fall through */
+		default:
+			if(sendp < &sendbuf[512])
+				*sendp++ = c;
+			*ep++ = c;
+			break;
+		
+	}
+	*ep = 0;
+	return(OTHER);
+}
+
+void
+sendfk(char *name)
+{
+	int i;
+	static int fd;
+
+	for(i=0; fk[i].name; i++)
+		if(strcmp(name, fk[i].name)==0){
+			sendnchars2(strlen(fk[i].sequence), fk[i].sequence);
+			return;
+		}
+}
+
+int
+waitchar(void)
+{
+	Event e;
+	int c;
+	char c2;
+	int newmouse;
+	int wasblocked;
+	int kbdchar = -1;
+	char echobuf[3*BSIZE];
+	static int lastc = -1;
+
+
+	for(;;) {
+		if(resize_flag)
+			resize();
+		wasblocked = blocked;
+		if(backp)
+			return(0);
+		if(ecanmouse() && (button2() || button3()))
+			readmenu();
+		if(snarffp) {
+			if((c = Bgetc(snarffp)) < 0) {
+				if(lastc != '\n')
+					write(outfd,"\n",1);
+				Bterm(snarffp);
+				snarffp = 0;
+				if(lastc != '\n') {
+					lastc = -1;
+					return('\n');
+				}
+				lastc = -1;
+				continue;
+			}
+			lastc = c;
+			c2 = c;
+			write(outfd, &c2, 1);
+			return(c);
+		}
+		if(!blocked && host_avail())
+			return(rcvchar());
+		if(kbdchar > 0) {
+			if(blocked)
+				resize();
+			if(cs->raw) {
+				switch(kbdchar){
+				case Kup:
+					sendfk("up key");
+					break;
+				case Kdown:
+					sendfk("down key");
+					break;
+				case Kleft:
+					sendfk("left key");
+					break;
+				case Kright:
+					sendfk("right key");
+					break;
+				case Kpgup:
+					sendfk("page up");
+					break;
+				case Kpgdown:
+					sendfk("page down");
+					break;
+				case KF|1:
+					sendfk("F1");
+					break;
+				case KF|2:
+					sendfk("F2");
+					break;
+				case KF|3:
+					sendfk("F3");
+					break;
+				case KF|4:
+					sendfk("F4");
+					break;
+				case KF|5:
+					sendfk("F5");
+					break;
+				case KF|6:
+					sendfk("F6");
+					break;
+				case KF|7:
+					sendfk("F7");
+					break;
+				case KF|8:
+					sendfk("F8");
+					break;
+				case KF|9:
+					sendfk("F9");
+					break;
+				case KF|10:
+					sendfk("F10");
+					break;
+				case KF|11:
+					sendfk("F11");
+					break;
+				case KF|12:
+					sendfk("F12");
+					break;
+				case '\n':
+					echobuf[0] = '\r';
+					sendnchars(1, echobuf);
+					break;
+				case '\r':
+					echobuf[0] = '\n';
+					sendnchars(1, echobuf);
+					break;
+				default:
+					echobuf[0] = kbdchar;
+					sendnchars(1, echobuf);
+					break;
+				}
+			} else if(canon(echobuf,kbdchar) == SCROLL) {
+				if(!blocked)
+					bigscroll();
+			} else
+				strcat(echo_input,echobuf);
+			blocked = 0;
+			kbdchar = -1;
+			continue;
+		}
+		curson(wasblocked);	/* turn on cursor while we're waiting */
+		do {
+			newmouse = 0;
+			switch(eread(blocked ? Emouse|Ekeyboard : 
+					       Emouse|Ekeyboard|Ehost, &e)) {
+			case Emouse:
+				mouse = e.mouse;
+				if(button2() || button3())
+					readmenu();
+				else if(resize_flag == 0) {
+					/* eresized() is triggered by special mouse event */
+					newmouse = 1;
+				}
+				break;
+			case Ekeyboard:
+				kbdchar = e.kbdc;
+				break;
+			case Ehost:
+				set_host(&e);
+				break;
+			default:
+				perror("protocol violation");
+				exits("protocol violation");
+			}
+		} while(newmouse == 1);
+		cursoff();	/* turn cursor back off */
+	}
+}
+
+void
+eresized(int new)
+{
+	resize_flag = 1+new;
+}
+
+void
+putenvint(char *name, int x)
+{
+	char buf[20];
+
+	snprint(buf, sizeof buf, "%d", x);
+	putenv(name, buf);
+}
+
+void
+exportsize(void)
+{
+	putenvint("XPIXELS", Dx(screen->r)-2*XMARGIN);
+	putenvint("YPIXELS", Dy(screen->r)-2*XMARGIN);
+	putenvint("LINES", ymax+1);
+	putenvint("COLS", xmax+1);
+	putenv("TERM", term);
+}
+
+void
+resize(void)
+{
+	if(resize_flag > 1 && getwindow(display, Refnone) < 0){
+		fprint(2, "can't reattach to window: %r\n");
+		exits("can't reattach to window");
+	}
+	xmax = (Dx(screen->r)-2*XMARGIN)/CW-1;
+	ymax = (Dy(screen->r)-2*YMARGIN)/NS-1;
+	if(xmax == 0 || ymax == 0)
+		exits("window gone");
+	x = 0;
+	y = 0;
+	yscrmin = 0;
+	yscrmax = ymax;
+	olines = 0;
+	exportsize();
+	clear(screen->r);
+	resize_flag = 0;
+	werrstr("");		/* clear spurious error messages */
+}
+
+void
+setdim(int ht, int wid)
+{
+	int fd;
+	Rectangle r;
+
+	if(ht != -1)
+		ymax = ht-1;
+	if(wid != -1)
+		xmax = wid-1;
+
+	r.min = screen->r.min;
+	r.max = addpt(screen->r.min,
+			Pt((xmax+1)*CW+2*XMARGIN+2*INSET,
+				(ymax+1)*NS+2*YMARGIN+2*INSET));
+	fd = open("/dev/wctl", OWRITE);
+	if(fd < 0 || fprint(fd, "resize -dx %d -dy %d\n", Dx(r)+2*Borderwidth,
+	    Dy(r)+2*Borderwidth) < 0){
+		border(screen, r, INSET, bordercol, ZP);
+		exportsize();
+	}
+	if(fd >= 0)
+		close(fd);
+}
+
+void
+readmenu(void)
+{
+	if(button3()) {
+		menu3.item[1] = ttystate[cs->raw].crnl ? "cr" : "crnl";
+		menu3.item[2] = ttystate[cs->raw].nlcr ? "nl" : "nlcr";
+		menu3.item[3] = cs->raw ? "cooked" : "raw";
+
+		switch(emenuhit(3, &mouse, &menu3)) {
+		case 0:		/* 24x80 */
+			setdim(24, 80);
+			return;
+		case 1:		/* newline after cr? */
+			ttystate[cs->raw].crnl = !ttystate[cs->raw].crnl;
+			return;
+		case 2:		/* cr after newline? */
+			ttystate[cs->raw].nlcr = !ttystate[cs->raw].nlcr;
+			return;
+		case 3:		/* switch raw mode */
+			cs->raw = !cs->raw;
+			return;
+		case 4:
+			exits(0);
+		}
+		return;
+	}
+
+	menu2.item[5] = pagemode? "scroll": "page";
+
+	switch(emenuhit(2, &mouse, &menu2)) {
+
+	case 0:		/* back up */
+		if(atend == 0) {
+			backc++;
+			backup(backc);
+		}
+		return;
+
+	case 1:		/* move forward */
+		backc--;
+		if(backc >= 0)
+			backup(backc);
+		else
+			backc = 0;
+		return;
+
+	case 2:		/* reset */
+		backc = 0;
+		backup(0);
+		return;
+
+	case 3:		/* clear screen */
+		eresized(0);
+		return;
+
+	case 4:		/* send the snarf buffer */
+		snarffp = Bopen("/dev/snarf",OREAD);
+		return;
+
+	case 5:		/* pause and clear at end of screen */
+		pagemode = 1-pagemode;
+		if(blocked && !pagemode) {
+			eresized(0);
+			blocked = 0;
+		}
+		return;
+	}
+}
+
+void
+backup(int count)
+{
+	register n;
+	register char *cp;
+
+	eresized(0);
+	n = 3*(count+1)*ymax/4;
+	cp = histp;
+	atend = 0;
+	while (n >= 0) {
+		cp--;
+		if(cp < hist)
+			cp = &hist[HISTSIZ-1];
+		if(*cp == '\0') {
+			atend = 1;
+			break;
+		}
+		if(*cp == '\n')
+			n--;
+	}
+	cp++;
+	if(cp >= &hist[HISTSIZ])
+		cp = hist;
+	backp = cp;
+	nbacklines = ymax-2;
+}
+
+Point
+pt(int x, int y)
+{
+	return addpt(screen->r.min, Pt(x*CW+XMARGIN,y*NS+YMARGIN));
+}
+
+void
+scroll(int sy, int ly, int dy, int cy)	/* source, limit, dest, which line to clear */
+{
+	draw(screen, Rpt(pt(0, dy), pt(xmax+1, dy+ly-sy)), screen, nil, pt(0, sy));
+	clear(Rpt(pt(0, cy), pt(xmax+1, cy+1)));
+	flushimage(display, 1);
+}
+
+void
+bigscroll(void)			/* scroll up half a page */
+{
+	int half = ymax/3;
+
+	if(x == 0 && y == 0)
+		return;
+	if(y < half) {
+		clear(Rpt(pt(0,0),pt(xmax+1,ymax+1)));
+		x = y = 0;
+		return;
+	}
+	draw(screen, Rpt(pt(0, 0), pt(xmax+1, ymax+1)), screen, nil, pt(0, half));
+	clear(Rpt(pt(0,y-half+1),pt(xmax+1,ymax+1)));
+	y -= half;
+	if(olines)
+		olines -= half;
+	flushimage(display, 1);
+}
+
+int
+number(char *p, int *got)
+{
+	int c, n = 0;
+
+	if(got)
+		*got = 0;
+	while ((c = get_next_char()) >= '0' && c <= '9'){
+		if(got)
+			*got = 1;
+		n = n*10 + c - '0';
+	}
+	*p = c;
+	return(n);
+}
+
+/* stubs */
+
+void
+sendnchars(int n,char *p)
+{
+	sendnchars2(n, p);
+	p[n+1] = 0;
+}
+
+void
+sendnchars2(int n,char *p)
+{
+	if(write(outfd,p,n) < 0) {
+		close(outfd);
+		close(0);
+		close(1);
+		close(2);
+		exits("write");
+	}
+}
+
+int
+host_avail(void)
+{
+	return(*echop || ((hostp - host_buf) < hostlength));
+}
+
+int
+rcvchar(void)
+{
+	int c;
+	if(*echop) {
+		c = *echop++;
+		if(!*echop) {
+			echop = echo_input;	
+			*echop = 0;
+		}
+		return c;
+	}
+	return *hostp++;
+}
+
+void
+set_host(Event *e)
+{
+	hostlength = e->n;
+	if(hostlength > host_bsize) {
+		host_bsize *= 2;
+		host_buf = realloc(host_buf,host_bsize);
+	}
+	hostp = host_buf;
+	memmove(host_buf,e->data,hostlength);
+	host_buf[hostlength]=0;
+}
+
+void
+ringbell(void){
+}
+
+int
+alnum(int c)
+{
+	if(c >= 'a' && c <= 'z')
+		return 1;
+	if(c >= 'A' && c <= 'Z')
+		return 1;
+	if(c >= '0' && c <= '9')
+		return 1;
+	return 0;
+}
+
+void
+escapedump(int fd,uchar *str,int len)
+{
+	int i;
+
+	for(i = 0; i < len; i++) {
+		if((str[i] < ' ' || str[i] > '\177') && 
+			str[i] != '\n' && str[i] != '\t') fprint(fd,"^%c",str[i]+64);
+		else if(str[i] == '\177') fprint(fd,"^$");
+		else if(str[i] == '\n') fprint(fd,"^J\n");
+		else fprint(fd,"%c",str[i]);
+	}
+}
+
+void
+funckey(int key)
+{
+	if(key >= NKEYS)
+		return;
+	if(fk[key].name == 0)
+		return;
+	sendnchars2(strlen(fk[key].sequence), fk[key].sequence);
+}
+
+
+void
+drawstring(Point p, char *str, int attr)
+{
+	int i;
+	Image *txt, *bg, *tmp;
+	
+	txt = fgcolor;
+	bg = bgcolor;
+	if(attr & TReverse){
+		tmp = txt;
+		txt = bg;
+		bg = tmp;
+	}
+	if(attr & THighIntensity){
+		for(i=0; i<8; i++)
+			if(txt == colors[i])
+				txt = hicolors[i];
+	}
+
+	draw(screen, Rpt(p, addpt(p, stringsize(font, str))), bg, nil, p);
+	string(screen, p, txt, ZP, font, str);
+}
diff --git a/sys/src/cmd/vt/mkfile b/sys/src/cmd/vt/mkfile
new file mode 100755
index 000000000..b4cad99d7
--- /dev/null
+++ b/sys/src/cmd/vt/mkfile
@@ -0,0 +1,18 @@
+</$objtype/mkfile
+
+#TARG=hp\
+#	vt\
+#	vt220\
+
+TARG=vt
+
+OFILES=\
+	consctl.$O\
+	event.$O\
+	main.$O\
+	vt.$O\
+
+HFILES=cons.h
+
+BIN=/$objtype/bin
+</sys/src/cmd/mkone
diff --git a/sys/src/cmd/vt/termcap b/sys/src/cmd/vt/termcap
new file mode 100755
index 000000000..b1c6ef1aa
--- /dev/null
+++ b/sys/src/cmd/vt/termcap
@@ -0,0 +1,5 @@
+h2|2621|hp2621|hp2621a|hp2621p|2621|2621a|2621p|hp 2621:\
+	:is=\E&j@\r\E3\r:bt=\Ei:cm=\E&a%r%dc%dY:dc=2\EP:ip=2:\
+	:kh=\Ep\r:ku=\Et\r:kl=\Eu\r:kr=\Ev\r:kd=\Ew\r:\
+	:kn#8:k1=\Ep\r:k2=\Eq\r:k3=\Er\r:k4=\Es\r:k5=\Et\r:k6=\Eu\r:k7=\Ev\r:\
+	:k8=\Ew\r:ks=\E&jB:ke=\E&j@:ta=2^I:tc=hp:
diff --git a/sys/src/cmd/vt/vt.c b/sys/src/cmd/vt/vt.c
new file mode 100755
index 000000000..999ead350
--- /dev/null
+++ b/sys/src/cmd/vt/vt.c
@@ -0,0 +1,943 @@
+/*
+ * Known bugs:
+ *
+ * 1. We don't handle cursor movement characters inside escape sequences.
+ * 	That is, ESC[2C moves two to the right, so ESC[2\bC is supposed to back
+ *	up one and then move two to the right.
+ *
+ * 2. We don't handle tabstops past nelem(tabcol) columns.
+ *
+ * 3. We don't respect requests to do reverse video for the whole screen.
+ *
+ * 4. We ignore the ESC#n codes, so that we don't do double-width nor 
+ * 	double-height lines, nor the ``fill the screen with E's'' confidence check.
+ *
+ * 5. Cursor key sequences aren't selected by keypad application mode.
+ *
+ * 6. "VT220" mode (-2) currently just switches the default cursor key
+ *	functions (same as -a); it's still just a VT100 emulation.
+ *
+ * 7. VT52 mode and a few other rarely used features are not implemented.
+ */
+
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <bio.h>
+#include <ctype.h>
+#include "cons.h"
+
+int	wraparound = 1;
+int	originrelative = 0;
+
+int	tabcol[200];
+
+struct funckey vt100fk[NKEYS] = {
+	{ "up key",		"\033OA", },
+	{ "down key",		"\033OB", },
+	{ "left key",		"\033OD", },
+	{ "right key",		"\033OC", },
+};
+
+struct funckey ansifk[NKEYS] = {
+	{ "up key",		"\033[A", },
+	{ "down key",		"\033[B", },
+	{ "left key",		"\033[D", },
+	{ "right key",		"\033[C", },
+	{ "F1",			"\033OP", },
+	{ "F2",			"\033OQ", },
+	{ "F3",			"\033OR", },
+	{ "F4",			"\033OS", },
+	{ "F5",			"\033OT", },
+	{ "F6",			"\033OU", },
+	{ "F7",			"\033OV", },
+	{ "F8",			"\033OW", },
+	{ "F9",			"\033OX", },
+	{ "F10",		"\033OY", },
+	{ "F11",		"\033OZ", },
+	{ "F12",		"\033O1", },
+};
+
+struct funckey vt220fk[NKEYS] = {
+	{ "up key",		"\033[A", },
+	{ "down key",		"\033[B", },
+	{ "left key",		"\033[D", },
+	{ "right key",		"\033[C", },
+};
+
+struct funckey xtermfk[NKEYS] = {
+	{ "page up",	"\033[5~", },
+	{ "page down",	"\033[6~", },
+	{ "up key",		"\033[A", },
+	{ "down key",		"\033[B", },
+	{ "left key",		"\033[D", },
+	{ "right key",		"\033[C", },
+	{ "F1",			"\033[11~", },
+	{ "F2",			"\033[12~", },
+	{ "F3",			"\033[13~", },
+	{ "F4",			"\033[14~", },
+	{ "F5",			"\033[15~", },
+	{ "F6",			"\033[17~", },
+	{ "F7",			"\033[18~", },
+	{ "F8",			"\033[19~", },
+	{ "F9",			"\033[20~", },
+	{ "F10",		"\033[21~", },
+	{ "F11",		"\033[22~", },
+	{ "F12",		"\033[23~", },
+};
+
+char gmap[256] = {
+	['_']	' ',	/* blank */
+	['\\']	'*',	/* diamond */
+	['a']	'X',	/* checkerboard */
+	['b']	'\t',	/* HT */
+	['c']	'\x0C',	/* FF */
+	['d']	'\r',	/* CR */
+	['e']	'\n',	/* LF */
+	['f']	'o',	/* degree */
+	['g']	'+',	/* plus/minus */
+	['h']	'\n',	/* NL, but close enough */
+	['i']	'\v',	/* VT */
+	['j']	'+',	/* lower right corner */
+	['k']	'+',	/* upper right corner */
+	['l']	'+',	/* upper left corner */
+	['m']	'+',	/* lower left corner */
+	['n']	'+',	/* crossing lines */
+	['o']	'-',	/* horiz line - scan 1 */
+	['p']	'-',	/* horiz line - scan 3 */
+	['q']	'-',	/* horiz line - scan 5 */
+	['r']	'-',	/* horiz line - scan 7 */
+	['s']	'-',	/* horiz line - scan 9 */
+	['t']	'+',	/* |-   */
+	['u']	'+',	/* -| */
+	['v']	'+',	/* upside down T */
+	['w']	'+',	/* rightside up T */
+	['x']	'|',	/* vertical bar */
+	['y']	'<',	/* less/equal */
+	['z']	'>',	/* gtr/equal */
+	['{']	'p',	/* pi */
+	['|']	'!',	/* not equal */
+	['}']	'L',	/* pound symbol */
+	['~']	'.',	/* centered dot: · */
+};
+
+static void setattr(int argc, int *argv);
+
+void
+fixops(int *operand)
+{
+	if(operand[0] < 1)
+		operand[0] = 1;
+}
+
+void
+emulate(void)
+{
+	char buf[BUFS+1];
+	int i;
+	int n;
+	int c;
+	int operand[10];
+	int noperand;
+	int savex, savey, saveattr, saveisgraphics;
+	int isgraphics;
+	int g0set, g1set;
+	int dch;
+
+	isgraphics = 0;
+	g0set = 'B';	/* US ASCII */
+	g1set = 'B';	/* US ASCII */
+	savex = savey = 0;
+	yscrmin = 0;
+	yscrmax = ymax;
+	saveattr = 0;
+	saveisgraphics = 0;
+	/* set initial tab stops to DEC-standard 8-column spacing */
+	for(c=0; (c+=8)<nelem(tabcol);)
+		tabcol[c] = 1;
+
+	for (;;) {
+		if (y > ymax) {
+			x = 0;
+			newline();
+		}
+		buf[0] = get_next_char();
+		buf[1] = '\0';
+		switch(buf[0]) {
+
+		case '\000':
+		case '\001':
+		case '\002':
+		case '\003':
+		case '\004':
+		case '\005':
+		case '\006':
+			goto Default;
+
+		case '\007':		/* bell */
+			ringbell();
+			break;
+
+		case '\010':		/* backspace */
+			if (x > 0)
+				--x;
+			break;
+
+		case '\011':		/* tab to next tab stop; if none, to right margin */
+			for(c=x+1; c<nelem(tabcol) && !tabcol[c]; c++)
+				;
+			if(c < nelem(tabcol))
+				x = c;
+			else
+				x = xmax;
+			break;
+
+		case '\012':		/* linefeed */
+		case '\013':
+		case '\014':
+			newline();
+			if (ttystate[cs->raw].nlcr)
+				x = 0;
+			break;
+
+		case '\015':		/* carriage return */
+			x = 0;
+			if (ttystate[cs->raw].crnl)
+				newline();
+			break;
+
+		case '\016':	/* SO: invoke G1 char set */
+			isgraphics = (isdigit(g1set));
+			break;
+		case '\017':	/* SI: invoke G0 char set */
+			isgraphics = (isdigit(g0set));
+			break;
+
+		case '\020':	/* DLE */
+		case '\021':	/* DC1 */
+		case '\022':	/* XON */
+		case '\023':	/* DC3 */
+		case '\024':	/* XOFF */
+		case '\025':	/* NAK */
+		case '\026':	/* SYN */
+		case '\027':	/* ETB */
+		case '\030':	/* CAN: cancel escape sequence, display checkerboard (not implemented) */
+		case '\031':	/* EM */
+		case '\032':	/* SUB: same as CAN */
+			goto Default;
+;
+		/* ESC, \033, is handled below */
+		case '\034':	/* FS */
+		case '\035':	/* GS */
+		case '\036':	/* RS */
+		case '\037':	/* US */
+			break;
+		case '\177':	/* delete: ignored */
+			break;
+
+		case '\033':
+			switch(dch = get_next_char()){
+			/*
+			 * 1 - graphic processor option on (no-op; not installed)
+			 */
+			case '1':
+				break;
+
+			/*
+			 * 2 - graphic processor option off (no-op; not installed)
+			 */
+			case '2':
+				break;
+
+			/*
+			 * 7 - save cursor position.
+			 */
+			case '7':
+//print("save\n");
+				savex = x;
+				savey = y;
+				saveattr = attr;
+				saveisgraphics = isgraphics;
+				break;
+
+			/*
+			 * 8 - restore cursor position.
+			 */
+			case '8':
+//print("restore\n");
+				x = savex;
+				y = savey;
+				attr = saveattr;
+				isgraphics = saveisgraphics;
+				break;
+
+			/*
+			 * c - Reset terminal.
+			 */
+			case 'c':
+print("resetterminal\n");
+				cursoron = 1;
+				ttystate[cs->raw].nlcr = 0;
+				break;
+
+			/*
+			 * D - active position down a line, scroll if at bottom margin.
+			 * (Original VT100 had a bug: tracked new-line/line-feed mode.)
+			 */
+			case 'D':
+				if(++y > yscrmax) {
+					y = yscrmax;
+					scroll(yscrmin+1, yscrmax+1, yscrmin, yscrmax);
+				}
+				break;
+
+			/*
+			 * E - active position to start of next line, scroll if at bottom margin.
+			 */
+			case 'E':
+				x = 0;
+				if(++y > yscrmax) {
+					y = yscrmax;
+					scroll(yscrmin+1, yscrmax+1, yscrmin, yscrmax);
+				}
+				break;
+
+			/*
+			 * H - set tab stop at current column.
+			 * (This is cursor home in VT52 mode (not implemented).)
+			 */
+			case 'H':
+				if(x < nelem(tabcol))
+					tabcol[x] = 1;
+				break;
+
+			/*
+			 * M - active position up a line, scroll if at top margin..
+			 */
+			case 'M':
+				if(--y < yscrmin) {
+					y = yscrmin;
+					scroll(yscrmin, yscrmax, yscrmin+1, yscrmin);
+				}
+				break;
+
+			/*
+			 * Z - identification.  the terminal
+			 * emulator will return the response
+			 * code for a generic VT100.
+			 */
+			case 'Z':
+			Ident:
+				sendnchars2(7, "\033[?1;2c");	/* VT100 with AVO option */
+//				sendnchars2(5, "\033[?6c");	/* VT102 (insert/delete-char, etc.) */
+				break;
+
+			/*
+			 * < - enter ANSI mode
+			 */
+			case '<':
+				break;
+
+			/*
+			 * > - set numeric keypad mode on (not implemented)
+			 */
+			case '>':
+				break;
+
+			/*
+			 * = - set numeric keypad mode off (not implemented)
+			 */
+			case '=':
+				break;
+
+			/*
+			 * # - Takes a one-digit argument
+			 */
+			case '#':
+				switch(get_next_char()){
+				case '3':		/* Top half of double-height line */
+				case '4':		/* Bottom half of double-height line */
+				case '5':		/* Single-width single-height line */
+				case '6':		/* Double-width line */
+				case '7':		/* Screen print */
+				case '8':		/* Fill screen with E's */
+					break;
+				}
+				break;
+
+			/*
+			 * ( - switch G0 character set
+			 */
+			case '(':
+				g0set = get_next_char();
+				break;
+
+			/*
+			 * - switch G1 character set
+			 */
+			case ')':
+				g1set = get_next_char();
+				break;
+
+			/*
+			 * Received left bracket.
+			 */
+			case '[':
+				/*
+				 * A semi-colon or ? delimits arguments.
+				 */
+				memset(operand, 0, sizeof(operand));
+				operand[0] = number(buf, &i);
+				noperand = 1;
+				while(buf[0] == ';' || buf[0] == '?'){
+					if(noperand < nelem(operand)){
+						noperand++;
+						operand[noperand-1] = number(buf, nil);
+					} else
+						number(buf, nil);
+				}
+
+				/*
+				 * do escape2 stuff
+				 */
+				switch(dch = buf[0]){
+					/*
+					 * c - same as ESC Z: what are you?
+					 */
+					case 'c':
+						goto Ident;
+
+					/*
+					 * g - various tabstop manipulation
+					 */
+					case 'g':
+						switch(operand[0]){
+						case 0:	/* clear tab at current column */
+							if(x < nelem(tabcol))
+								tabcol[x] = 0;
+							break;
+						case 3:	/* clear all tabs */
+							memset(tabcol, 0, sizeof tabcol);
+							break;
+						}
+						break;
+
+					/*
+					 * l - clear various options.
+					 */
+					case 'l':
+						if(noperand == 1){
+							switch(operand[0]){	
+							case 20:	/* set line feed mode */
+								ttystate[cs->raw].nlcr = 1;
+								break;
+							case 30:	/* screen invisible (? not supported through VT220) */
+								break;
+							}
+						}else while(--noperand > 0){
+							switch(operand[noperand]){
+							case 1:	/* set cursor keys to send ANSI functions: ESC [ A..D */
+								break;
+							case 2:	/* set VT52 mode (not implemented) */
+								break;
+							case 3:	/* set 80 columns */
+								setdim(-1, 80);
+								break;
+							case 4:	/* set jump scrolling */
+								break;
+							case 5:	/* set normal video on screen */
+								break;
+							case 6:	/* set origin to absolute */
+								originrelative = 0;
+								x = y = 0;
+								break;
+							case 7:	/* reset auto-wrap mode */
+								wraparound = 0;
+								break;
+							case 8:	/* reset auto-repeat mode */
+								break;
+							case 9:	/* reset interlacing mode */
+								break;
+							case 25:	/* text cursor off (VT220) */
+								cursoron = 0;
+								break;
+							}
+						}
+						break;
+
+					/*
+					* s - some dec private stuff. actually [ ? num s, but we can't detect it.
+					*/
+					case 's':
+						break;
+
+					/*
+					 * h - set various options.
+					 */
+					case 'h':
+						if(noperand == 1){
+							switch(operand[0]){
+							default:
+								break;
+							case 20:	/* set newline mode */
+								ttystate[cs->raw].nlcr = 0;
+								break;
+							case 30:	/* screen visible (? not supported through VT220) */
+								break;
+							}
+						}else while(--noperand > 0){
+							switch(operand[noperand]){
+							default:
+								break;
+							case 1:	/* set cursor keys to send application function: ESC O A..D */
+								break;
+							case 2:	/* set ANSI */
+								break;
+							case 3:	/* set 132 columns */
+								setdim(-1, 132);
+								break;
+							case 4:	/* set smooth scrolling */
+								break;
+							case 5:	/* set screen to reverse video (not implemented) */
+								break;
+							case 6:	/* set origin to relative */
+								originrelative = 1;
+								x = 0;
+								y = yscrmin;
+								break;
+							case 7:	/* set auto-wrap mode */
+								wraparound = 1;
+								break;
+							case 8:	/* set auto-repeat mode */
+								break;
+							case 9:	/* set interlacing mode */
+								break;
+							case 25:	/* text cursor on (VT220) */
+								cursoron = 1;
+								break;
+							}
+						}
+						break;
+
+					/*
+					 * m - change character attrs.
+					 */
+					case 'm':
+						setattr(noperand, operand);
+						break;
+
+					/*
+					 * n - request various reports
+					 */
+					case 'n':
+						switch(operand[0]){
+						case 5:	/* status */
+							sendnchars2(4, "\033[0n");	/* terminal ok */
+							break;
+						case 6:	/* cursor position */
+							sendnchars2(sprint(buf, "\033[%d;%dR",
+								originrelative ? y+1 - yscrmin : y+1, x+1), buf);
+							break;
+						}
+						break;
+
+					/*
+					 * q - turn on list of LEDs; turn off others.
+					 */
+					case 'q':
+						break;
+
+					/*
+					 * r - change scrolling region.  operand[0] is
+					 * min scrolling region and operand[1] is max
+					 * scrolling region.
+					 */
+					case 'r':
+						yscrmin = 0;
+						yscrmax = ymax;
+						switch(noperand){
+						case 2:
+							yscrmax = operand[1]-1;
+							if(yscrmax > ymax)
+								yscrmax = ymax;
+						case 1:
+							yscrmin = operand[0]-1;
+							if(yscrmin < 0)
+								yscrmin = 0;
+						}
+						x = 0;
+						y = yscrmin;
+						break;
+
+					/*
+					 * x - report terminal parameters
+					 */
+					case 'x':
+						sendnchars2(20, "\033[3;1;1;120;120;1;0x");
+						break;
+
+					/*
+					 * y - invoke confidence test
+					 */
+					case 'y':
+						break;
+
+					/*
+					 * A - cursor up.
+					 */
+					case 'e':
+					case 'A':
+						fixops(operand);
+						y -= operand[0];
+						if(y < yscrmin)
+							y = yscrmin;
+						olines -= operand[0];
+						if(olines < 0)
+							olines = 0;
+						break;
+
+					/*
+					 * B - cursor down
+					 */
+					case 'B':
+						fixops(operand);
+						y += operand[0];
+						if(y > yscrmax)
+							y=yscrmax;
+						break;
+					
+					/*
+					 * C - cursor right
+					 */
+					case 'a':
+					case 'C':
+						fixops(operand);
+						x += operand[0];
+						/*
+						 * VT-100-UG says not to go past the
+						 * right margin.
+						 */
+						if(x > xmax)
+							x = xmax;
+						break;
+
+					/*
+					 * D - cursor left
+					 */
+					case 'D':
+						fixops(operand);
+						x -= operand[0];
+						if(x < 0)
+							x = 0;
+						break;
+
+					/*
+					 *	G - cursor to column
+					 */
+					case '\'':
+					case 'G':
+						fixops(operand);
+						x = operand[0] - 1;
+						if(x > xmax)
+							x = xmax;
+						break;
+
+					/*
+					 * H and f - cursor motion.  operand[0] is row and
+					 * operand[1] is column, origin 1.
+					 */
+					case 'H':
+					case 'f':
+						fixops(operand+1);
+						x = operand[1] - 1;
+						if(x > xmax)
+							x = xmax;
+
+						/* fallthrough */
+
+					/*
+					 * d - cursor to line n (xterm)
+					 */
+					case 'd':
+						fixops(operand);
+						y = operand[0] - 1;
+						if(originrelative){
+							y += yscrmin;
+							if(y > yscrmax)
+								y = yscrmax;
+						}else{
+							if(y > ymax)
+								y = ymax;
+						}
+						break;
+
+					/*
+					 * J - clear some or all of the display.
+					 */
+					case 'J':
+						switch (operand[0]) {
+							/*
+							 * operand 2:  whole screen.
+							 */
+							case 2:
+								clear(Rpt(pt(0, 0), pt(xmax+1, ymax+1)));
+								break;
+							/*
+							 * operand 1: start of screen to active position, inclusive.
+							 */
+							case 1:
+								clear(Rpt(pt(0, 0), pt(xmax+1, y)));
+								clear(Rpt(pt(0, y), pt(x+1, y+1)));
+								break;
+							/*
+							 * Default:  active position to end of screen, inclusive.
+							 */
+							default:
+								clear(Rpt(pt(x, y), pt(xmax+1, y+1)));
+								clear(Rpt(pt(0, y+1), pt(xmax+1, ymax+1)));
+								break;
+						}
+						break;
+
+					/*
+					 * K - clear some or all of the line.
+					 */
+					case 'K':
+						switch (operand[0]) {
+							/*
+							 * operand 2: whole line.
+							 */
+							case 2:
+								clear(Rpt(pt(0, y), pt(xmax+1, y+1)));
+								break;
+							/*
+							 * operand 1: start of line to active position, inclusive.
+							 */
+							case 1:
+								clear(Rpt(pt(0, y), pt(x+1, y+1)));
+								break;
+							/*
+							 * Default: active position to end of line, inclusive.
+							 */
+							default:
+								clear(Rpt(pt(x, y), pt(xmax+1, y+1)));
+								break;
+						}
+						break;
+
+					/*
+					 *	P - delete character(s) from right of cursor (xterm)
+					 */
+					case 'P':
+						fixops(operand);
+						i = x + operand[0];
+						draw(screen, Rpt(pt(x, y), pt(xmax+1, y+1)), screen, nil, pt(i, y));
+						clear(Rpt(pt(xmax-operand[0], y), pt(xmax+1, y+1)));
+						break;
+
+					/*
+					 *	@ - insert blank(s) to right of cursor (xterm)
+					 */
+					case '@':
+						fixops(operand);
+						i = x + operand[0];
+						draw(screen, Rpt(pt(i, y), pt(xmax+1, y+1)), screen, nil, pt(x, y));
+						clear(Rpt(pt(x, y), pt(i, y+1)));
+						break;
+
+
+					/*
+					 *	X - erase character(s) at cursor and to the right (xterm)
+					 */
+					case 'X':
+						fixops(operand);
+						i = x + operand[0];
+						clear(Rpt(pt(x, y), pt(i, y+1)));
+						break;
+
+					/*
+					 * L - insert a line at cursor position (VT102 and later)
+					 */
+					case 'L':
+						fixops(operand);
+						for(i = 0; i < operand[0]; ++i)
+							scroll(y, yscrmax, y+1, y);
+						break;
+
+					/*
+					 * M - delete a line at cursor position (VT102 and later)
+					 */
+					case 'M':
+						fixops(operand);
+						for(i = 0; i < operand[0]; ++i)
+							scroll(y+1, yscrmax+1, y, yscrmax);
+						break;
+
+					/*
+					 * S,T - scroll up/down (xterm)
+					 */
+					case 'T':
+						fixops(operand);
+						for(i = 0; i < operand[0]; ++i)
+							scroll(yscrmin, yscrmax, yscrmin+1, yscrmin);
+						break;
+
+					case 'S':
+						fixops(operand);
+						for(i = 0; i < operand[0]; ++i)
+							scroll(yscrmin+1, yscrmax+1, yscrmin, yscrmin);
+						break;
+
+					case '=':	/* ? not supported through VT220 */
+						number(buf, nil);
+						switch(buf[0]) {
+						case 'h':
+						case 'l':
+							break;
+						}
+						break;
+
+					/*
+					 * Anything else we ignore for now...
+					 */
+					default:
+print("unknown escape2 '%c' (0x%x)\n", dch, dch);
+						break;
+				}
+
+				break;
+
+			/*
+			 * Collapse multiple '\033' to one.
+			 */
+			case '\033':
+				peekc = '\033';
+				break;
+
+			/* set title */
+			case ']':	/* it's actually <esc> ] num ; title <bel> */
+				{
+					int ch, fd;
+					number(buf, nil);
+					i = 0;
+					while((ch = get_next_char()) != '\a')
+						if(i < sizeof buf)
+							buf[i++] = ch;
+					fd = open("/dev/label", OWRITE);
+					write(fd, buf, i);
+					close(fd);
+				}
+				break;
+
+			/*
+			 * Ignore other commands.
+			 */
+			default:
+print("unknown command '%c' (0x%x)\n", dch, dch);
+				break;
+
+			}
+			break;
+
+		default:		/* ordinary char */
+Default:
+			if(isgraphics && gmap[(uchar) buf[0]])
+				buf[0] = gmap[(uchar) buf[0]];
+
+			/* line wrap */
+			if (x > xmax){
+				if(wraparound){
+					x = 0;
+					newline();
+				}else{
+					continue;
+				}
+			}
+			n = 1;
+			c = 0;
+			while (!cs->raw && host_avail() && x+n<=xmax && n<BUFS
+			    && (c = get_next_char())>=' ' && c<'\177') {
+				buf[n++] = c;
+				c = 0;
+			}
+			buf[n] = 0;
+//			clear(Rpt(pt(x,y), pt(x+n, y+1)));
+			drawstring(pt(x, y), buf, attr);
+			x += n;
+			peekc = c;
+			break;
+		}
+	}
+}
+
+static void
+setattr(int argc, int *argv)
+{
+	int i;
+
+	for(i=0; i<argc; i++) {
+		switch(argv[i]) {
+		case 0:
+			attr = defattr;
+			fgcolor = fgdefault;
+			bgcolor = bgdefault;
+			break;
+		case 1:
+			attr |= THighIntensity;
+			break;		
+		case 4:
+			attr |= TUnderline;
+			break;		
+		case 5:
+			attr |= TBlink;
+			break;
+		case 7:
+			attr |= TReverse;
+			break;
+		case 8:
+			attr |= TInvisible;
+			break;
+		case 22:
+			attr &= ~THighIntensity;
+			break;		
+		case 24:
+			attr &= ~TUnderline;
+			break;		
+		case 25:
+			attr &= ~TBlink;
+			break;
+		case 27:
+			attr &= ~TReverse;
+			break;
+		case 28:
+			attr &= ~TInvisible;
+			break;
+		case 30:	/* black */
+		case 31:	/* red */
+		case 32:	/* green */
+		case 33:	/* brown */
+		case 34:	/* blue */
+		case 35:	/* purple */
+		case 36:	/* cyan */
+		case 37:	/* white */
+			fgcolor = (nocolor? fgdefault: colors[argv[i]-30]);
+			break;
+		case 39:
+			fgcolor = fgdefault;
+			break;
+		case 40:	/* black */
+		case 41:	/* red */
+		case 42:	/* green */
+		case 43:	/* brown */
+		case 44:	/* blue */
+		case 45:	/* purple */
+		case 46:	/* cyan */
+		case 47:	/* white */
+			bgcolor = (nocolor? bgdefault: colors[argv[i]-40]);
+			break;
+		case 49:
+			bgcolor = bgdefault;
+			break;
+		}
+	}
+}