From d58dd3b8bc42ed31232e4145696d7dacb117a31c Mon Sep 17 00:00:00 2001
From: Anselm R Garbe <garbeam@gmail.com>
Date: Sun, 10 May 2009 13:17:09 +0100
Subject: backport of local changes

---
 LICENSE   |  43 +--
 Makefile  |  69 ++---
 README    |  28 ++
 TODO      |   9 +
 config.mk |  31 +++
 st.c      | 926 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 st.h      | 181 ++++++++++++
 st.info   |  54 ++++
 std.c     | 363 ------------------------
 9 files changed, 1278 insertions(+), 426 deletions(-)
 create mode 100644 README
 create mode 100644 TODO
 create mode 100644 config.mk
 create mode 100644 st.h
 create mode 100644 st.info
 delete mode 100644 std.c

diff --git a/LICENSE b/LICENSE
index ce8ec88..ee32d28 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,22 +1,25 @@
-MIT/X Consortium License
+Copyright (c) 2009, Aurélien APTEL <aurelien dot aptel at gmail dot com>
+Copyright (c) 2009, Anselm R Garbe <garbeam at gmail dot com>
 
-© 2007-2008 Anselm R Garbe <garbeam at gmail dot com>
-© 2008 Matthias Christian Ott <ott at enolink dot de>
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * 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.
+    * Neither the name of the copyright holder nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
 
-Permission is hereby granted, free of charge, to any person obtaining a
-copy of this software and associated documentation files (the "Software"),
-to deal in the Software without restriction, including without limitation
-the rights to use, copy, modify, merge, publish, distribute, sublicense,
-and/or sell copies of the Software, and to permit persons to whom the 
-Software is furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in 
-all copies or substantial portions of the Software. 
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL 
-THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
-FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
-DEALINGS IN THE SOFTWARE.
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
+HOLDER 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.
diff --git a/Makefile b/Makefile
index 0f74456..b0bd42d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,45 +1,50 @@
 # st - simple terminal
 # See LICENSE file for copyright and license details.
 
-VERSION = 0.0
+include config.mk
 
-PREFIX = /usr/local
-MANDIR = $(PREFIX)/share/man
+SRC = st.c
+OBJ = ${SRC:.c=.o}
 
-CFLAGS = -DVERSION=\"0.0\" -D_GNU_SOURCE
+all: options st
 
-all: st std
+options:
+	@echo st build options:
+	@echo "CFLAGS   = ${CFLAGS}"
+	@echo "LDFLAGS  = ${LDFLAGS}"
+	@echo "CC       = ${CC}"
+
+.c.o:
+	@echo CC $<
+	@${CC} -c ${CFLAGS} $<
+
+${OBJ}: config.mk
+
+st: ${OBJ}
+	@echo CC -o $@
+	@${CC} -o $@ ${OBJ} ${LDFLAGS}
 
 clean:
-	rm -f st std
-	rm -f st.o std.o
-	rm -f st-$(VERSION).tar.gz
+	@echo cleaning
+	@rm -f st ${OBJ} st-${VERSION}.tar.gz
 
 dist: clean
-	mkdir st-$(VERSION)
-	cp -f LICENSE README st-$(VERSION)
-	cp -f Makefile config.mk st-$(VERSION)
-	cp -f st.1 std.1 st-$(VERSION)
-	cp -f st.c std.c st-$(VERSION)
-	tar -czf st-$(VERSION).tar st-$(VERSION)
-	rm -rf st-$(VERSION)
-
-install:
-	mkdir -p $(DESTDIR)$(PREFIX)/bin
-	cp -f st $(DESTDIR)$(PREFIX)/bin
-	cp -f std $(DESTDIR)$(PREFIX)/bin
-	chmod 755 $(DESTDIR)$(PREFIX)/bin/st
-	chmod 755 $(DESTDIR)$(PREFIX)/bin/std
-	mkdir -p $(DESTDIR)$(MANDIR)/man1
-	sed 's/VERSION/$(VERSION)/g' < st.1 > $(DESTDIR)$(MANDIR)/man1/st.1
-	chmod 644 $(DESTDIR)$(MANDIR)/man1/st.1
-	sed 's/VERSION/$(VERSION)/g' < std.1 > $(DESTDIR)$(MANDIR)/man1/std.1
-	chmod 644 $(DESTDIR)$(MANDIR)/man1/std.1
+	@echo creating dist tarball
+	@mkdir -p st-${VERSION}
+	@cp -R LICENSE Makefile README config.mk st.h ${SRC} st-${VERSION}
+	@tar -cf st-${VERSION}.tar st-${VERSION}
+	@gzip st-${VERSION}.tar
+	@rm -rf st-${VERSION}
+
+install: all
+	@echo installing executable file to ${DESTDIR}${PREFIX}/bin
+	@mkdir -p ${DESTDIR}${PREFIX}/bin
+	@cp -f st ${DESTDIR}${PREFIX}/bin
+	@chmod 755 ${DESTDIR}${PREFIX}/bin/st
+	@tic st.info
 
 uninstall:
-	rm -f $(DESTDIR)$(PREFIX)/bin/st
-	rm -f $(DESTDIR)$(PREFIX)/bin/std
-	rm -f $(DESTDIR)$(MANDIR)/man1/st.1
-	rm -f $(DESTDIR)$(MANDIR)/man1/std.1
+	@echo removing executable file from ${DESTDIR}${PREFIX}/bin
+	@rm -f ${DESTDIR}${PREFIX}/bin/st
 
-.PHONY: all clean dist install uninstall
+.PHONY: all options clean dist install uninstall
diff --git a/README b/README
new file mode 100644
index 0000000..09a7fff
--- /dev/null
+++ b/README
@@ -0,0 +1,28 @@
+st - simple terminal
+--------------------
+st is a simple virtual terminal emulator for X which sucks less.
+
+
+Requirements
+------------
+In order to build st you need the Xlib header files.
+
+
+Installation
+------------
+Edit config.mk to match your local setup (st is installed into
+the /usr/local namespace by default).
+
+Afterwards enter the following command to build and install st (if
+necessary as root):
+
+    make clean install
+
+
+Running st
+----------
+See the man page for details.
+
+Credits
+-------
+Based on  Aurélien APTEL <aurelien dot aptel at gmail dot com> bt source code.
diff --git a/TODO b/TODO
new file mode 100644
index 0000000..70fa785
--- /dev/null
+++ b/TODO
@@ -0,0 +1,9 @@
+  - write a clean terminfo entry
+  - write global "setup" func
+  - try to split more logic/gfx
+  - optimize drawing
+  - handle copy/paste
+  - fix fork/child exit problem
+  - fix resize (shrinking should move last line up)
+  - handle utf8 
+  - refactor/clean code
diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..62eb48f
--- /dev/null
+++ b/config.mk
@@ -0,0 +1,31 @@
+# st version
+VERSION = 0.0
+
+# Customize below to fit your system
+
+# paths
+PREFIX = /usr/local
+MANPREFIX = ${PREFIX}/share/man
+
+X11INC = /usr/X11R6/include
+X11LIB = /usr/X11R6/lib
+
+# Xinerama, comment if you don't want it
+#XINERAMALIBS = -L${X11LIB} -lXinerama
+#XINERAMAFLAGS = -DXINERAMA
+
+# includes and libs
+INCS = -I. -I/usr/include -I${X11INC}
+LIBS = -L/usr/lib -lc -L${X11LIB} -lX11 ${XINERAMALIBS}
+
+# flags
+CPPFLAGS = -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
+CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
+LDFLAGS = -s ${LIBS}
+
+# Solaris
+#CFLAGS = -fast ${INCS} -DVERSION=\"${VERSION}\"
+#LDFLAGS = ${LIBS}
+
+# compiler and linker
+CC = cc
diff --git a/st.c b/st.c
index 8a8804f..d5f004b 100644
--- a/st.c
+++ b/st.c
@@ -1,17 +1,921 @@
-/* See LICENSE file for copyright and license details. */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
+/* See LICENSE for licence details.  */
+#include "st.h"
+
+/* Globals */
+DC dc;
+XWindow xw;
+Term term;
+Escseq escseq;
+int cmdfd;
+int running;
+
+void
+die(const char *errstr, ...) {
+	va_list ap;
+
+	va_start(ap, errstr);
+	vfprintf(stderr, errstr, ap);
+	va_end(ap);
+	exit(EXIT_FAILURE);
+}
+
+void
+execsh(void) {
+	char *args[3] = {SHELL, "-i", NULL};
+	putenv("TERM=" TNAME);
+	execvp(SHELL, args);
+}
+
+void
+xbell(void) {   /* visual bell */
+	XRectangle r = { 0, 0, xw.w, xw.h };
+	XSetForeground(xw.dis, dc.gc, dc.col[BellCol]);
+	XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
+	XFlush(xw.dis);
+	usleep(30000);
+	draw(SCredraw);
+}
+
+void
+ttynew(void) {
+	int m, s;
+	pid_t pid;
+	char *pts;
+
+	if((m = posix_openpt(O_RDWR | O_NOCTTY)) < 0)
+		die("openpt");
+	if(grantpt(m) == -1)
+		die("grandpt");
+	if(unlockpt(m) == -1)
+		die("unlockpt");
+	if((pts = ptsname(m)) == NULL)
+		die("ptsname");
+	if((s = open(pts, O_RDWR | O_NOCTTY)) < 0)
+		die("slave open");
+	fcntl(s, F_SETFL, O_NDELAY);
+	switch(pid = fork()) {
+	case -1:
+		die("fork");
+		break;
+	case 0:
+		setsid(); /* create a new process group */
+		dup2(s, STDIN_FILENO);
+		dup2(s, STDOUT_FILENO);
+		dup2(s, STDERR_FILENO);
+		if(ioctl(s, TIOCSCTTY, NULL) < 0)
+			die("slave TTIOCSTTY");
+		execsh();
+		break;
+	default:
+		close(s);
+		cmdfd = m;
+	}
+}
+
+void
+dump(char c) {
+	static int col;
+	fprintf(stderr, " %02x %c ", c, isprint(c)?c:'.');
+	if(++col % 10 == 0)
+		fprintf(stderr, "\n");
+}
+
+void
+ttyread(void) {
+	char buf[BUFSIZ] = {0};
+	int ret;
+
+	switch(ret = read(cmdfd, buf, BUFSIZ)) {
+	case -1: /* error or exit */
+		/* XXX: be more precise */
+		running = 0;
+		break;
+	default:
+		tputs(buf, ret);
+	}
+}
+
+void
+ttywrite(char *s, size_t n) {
+	if(write(cmdfd, s, n) == -1)
+		die("write error on tty.");
+}
+
+void
+ttyresize(int x, int y) {
+	struct winsize w;
+
+	w.ws_row = term.row;
+	w.ws_col = term.col;
+	w.ws_xpixel = w.ws_ypixel = 0;
+	if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
+		fprintf(stderr, "Couldn't set window size: %m\n");
+}
 
 int
-main(int argc, char *argv[]) {
-	if(argc == 2 && !strcmp("-v", argv[1])) {
-		fprintf(stderr, "st-"VERSION", © 2007-2008 st engineers, see LICENSE for details\n");
-		exit(EXIT_SUCCESS);
+escfinal(char c) {
+	if(escseq.len == 1)
+		switch(c) {
+		case '[':
+		case ']':
+		case '(':
+			return 0;
+		case '=':
+		case '>':
+		default:
+			return 1;
+		}
+	else if(BETWEEN(c, 0x40, 0x7E))
+		return 1;
+	return 0;     
+}
+
+void
+tcpos(int mode) {
+	static int x = 0;
+	static int y = 0;
+
+	if(mode == CSsave)
+		x = term.c.x, y = term.c.y;
+	else if(mode == CSload)
+		tmoveto(x, y);
+}
+
+void
+tnew(int col, int row) {   /* screen size */
+	term.row = row, term.col = col;
+	term.top = 0, term.bot = term.row - 1;
+	/* mode */
+	term.mode = TMwrap;
+	/* cursor */
+	term.c.attr.mode = ATnone;
+	term.c.attr.fg = DefaultFG;
+	term.c.attr.bg = DefaultBG;
+	term.c.x = term.c.y = 0;
+	term.c.hidden = 0;
+	/* allocate screen */
+	term.line = calloc(term.row, sizeof(Line));
+	for(row = 0 ; row < term.row; row++)
+		term.line[row] = calloc(term.col, sizeof(Glyph));
+}
+
+void
+tscroll(void) {
+	Line temp = term.line[term.top];
+	int i;
+
+	for(i = term.top; i < term.bot; i++)
+		term.line[i] = term.line[i+1];
+	memset(temp, 0, sizeof(Glyph) * term.col);
+	term.line[term.bot] = temp;
+	xscroll();    
+}
+
+void
+tnewline(void) {
+	int y = term.c.y + 1;
+
+	if(y > term.bot) {
+		tscroll(), y = term.bot;
 	}
-	else if(argc != 1) {
-		fprintf(stderr, "usage: st [-v]\n");
-		exit(EXIT_FAILURE);
+	tmoveto(0, y);
+}
+
+int
+escaddc(char c) {
+	escseq.buf[escseq.len++] = c;
+	if(escfinal(c) || escseq.len >= ESCSIZ) {
+		escparse(), eschandle();
+		return 0;
 	}
+	return 1;
+}
+
+void
+escparse(void) {
+	/* int noarg = 1; */
+	char *p = escseq.buf;
+
+	escseq.narg = 0;
+	switch(escseq.pre = *p++) {
+	case '[': /* CSI */
+		if(*p == '?')
+			escseq.priv = 1, p++;
+
+		while(p < escseq.buf+escseq.len) {
+			while(isdigit(*p)) {
+				escseq.arg[escseq.narg] *= 10;
+				escseq.arg[escseq.narg] += *(p++) - '0'/*, noarg = 0 */;
+			}
+			if(*p == ';')
+				escseq.narg++, p++;
+			else {
+				escseq.mode = *p;
+				escseq.narg++;
+				return;
+			}
+		}
+		break;
+	case '(':
+		/* humf charset stuff */
+		break;
+	}
+}
+
+void
+tmoveto(int x, int y) {
+	term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
+	term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
+}
+
+void
+tcursor(int dir) {
+	int xi = term.c.x, yi = term.c.y;
+	int xf = xi, yf = yi;
+
+	switch(dir) {
+	case CSup:
+		yf--;
+		break;
+	case CSdown:
+		yf++;
+		break;
+	case CSleft:
+		xf--;
+		if(xf < 0) {
+			xf = term.col-1, yf--;
+			if(yf < term.top)
+				yf = term.top, xf = 0;
+		}
+		break;
+	case CSright:
+		xf++;
+		if(xf >= term.col) {
+			xf = 0, yf++;
+			if(yf > term.bot)
+				yf = term.bot, tscroll();
+		}
+		break;
+	}
+	tmoveto(xf, yf);
+}
+
+void
+tsetchar(char c) {
+	term.line[term.c.y][term.c.x] = term.c.attr;
+	term.line[term.c.y][term.c.x].c = c;
+	term.line[term.c.y][term.c.x].state |= CRset | CRupdate;
+}
+
+void
+tclearregion(int x1, int y1, int x2, int y2) {
+	int x, y;
+
+	LIMIT(x1, 0, term.col-1);
+	LIMIT(x2, 0, term.col-1);
+	LIMIT(y1, 0, term.row-1);
+	LIMIT(y2, 0, term.row-1);
+
+	/* XXX: could be optimized */
+	for(x = x1; x <= x2; x++)
+		for(y = y1; y <= y2; y++)
+			memset(&term.line[y][x], 0, sizeof(Glyph));
+
+	xclear(x1, y1, x2, y2);
+}
+
+void
+tdeletechar(int n) {
+	int src = term.c.x + n;
+	int dst = term.c.x;
+	int size = term.col - src;
+
+	if(src >= term.col) {
+		tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
+		return;
+	}
+	memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
+	tclearregion(term.col-size, term.c.y, term.col-1, term.c.y);
+}
+
+void
+tinsertblank(int n) {
+	int src = term.c.x;
+	int dst = src + n;
+	int size = term.col - n - src;
+
+	if(dst >= term.col) {
+		tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
+		return;
+	}
+	memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
+	tclearregion(src, term.c.y, dst, term.c.y);
+}
+
+void
+tinsertblankline (int n) {
+	int i;
+	Line blank;
+	int bot = term.bot;
+
+	if(term.c.y > term.bot)
+		bot = term.row - 1;
+	else if(term.c.y < term.top)
+		bot = term.top - 1;
+	if(term.c.y + n >= bot) {
+		tclearregion(0, term.c.y, term.col-1, bot);
+		return;
+	}
+	for(i = bot; i >= term.c.y+n; i--) {
+		/* swap deleted line <-> blanked line */
+		blank = term.line[i];
+		term.line[i] = term.line[i-n];
+		term.line[i-n] = blank;
+		/* blank it */
+		memset(blank, 0, term.col * sizeof(Glyph));
+	}
+}
+
+
+void
+tdeleteline(int n) {
+	int i;
+	Line blank;
+	int bot = term.bot;
+
+	if(term.c.y > term.bot)
+		bot = term.row - 1;
+	else if(term.c.y < term.top)
+		bot = term.top - 1;
+	if(term.c.y + n >= bot) {
+		tclearregion(0, term.c.y, term.col-1, bot);
+		return;
+	}
+	for(i = term.c.y; i <= bot-n; i++) {
+		/* swap deleted line <-> blanked line */
+		blank = term.line[i];
+		term.line[i] = term.line[i+n];
+		term.line[i+n] = blank;
+		/* blank it */
+		memset(blank, 0, term.col * sizeof(Glyph));
+	}
+}
+
+void
+tsetattr(int *attr, int l) {
+	int i;
+
+#ifdef TRUECOLOR /* ESC [ ? <fg/bg> ; <r> ; <g> ; <b> m */
+	Color col;
+	if(escseq.priv && escseq.len == 4) { /* True color extension :) */
+		col = (escseq.arg[1]<<16) + (escseq.arg[2]<<8) + escseq.arg[3];
+		switch(escseq.arg[0]) {
+		case 3: /* foreground */
+			term.c.attr.fg = col;
+			break;
+		case 4: /* background */
+			term.c.attr.bg = col;
+			break;
+		}
+	}
+	else
+#endif
+		for(i = 0; i < l; i++) {
+			switch(attr[i]) {
+			case 0:
+				memset(&term.c.attr, 0, sizeof(term.c.attr));
+				term.c.attr.fg = DefaultFG;
+				term.c.attr.bg = DefaultBG;
+				break;
+			case 1:
+				term.c.attr.mode |= ATbold;  
+				break;
+			case 4: 
+				term.c.attr.mode |= ATunderline;
+				break;
+			case 7: 
+				term.c.attr.mode |= ATreverse;  
+				break;
+			case 8:
+				term.c.hidden = CShide;
+				break;
+			case 22: 
+				term.c.attr.mode &= ~ATbold;  
+				break;
+			case 24: 
+				term.c.attr.mode &= ~ATunderline;
+				break;
+			case 27: 
+				term.c.attr.mode &= ~ATreverse;  
+				break;
+			case 39:
+				term.c.attr.fg = DefaultFG;
+				break;
+			case 49:
+				term.c.attr.fg = DefaultBG;
+				break;
+			default:
+				if(BETWEEN(attr[i], 30, 37))
+					term.c.attr.fg = attr[i] - 30;
+				else if(BETWEEN(attr[i], 40, 47))
+					term.c.attr.bg = attr[i] - 40;
+				break;
+			}
+		}
+}
+
+void
+tsetscroll(int t, int b) {
+	int temp;
+
+	LIMIT(t, 0, term.row-1);
+	LIMIT(b, 0, term.row-1);
+	if(t > b) {
+		temp = t;
+		t = b;
+		b = temp;
+	}
+	term.top = t;
+	term.bot = b;    
+}
+
+
+void
+eschandle(void) { 
+	/* escdump(); */
+	switch(escseq.pre) {
+	case '[':
+		switch(escseq.mode) {
+		case '@': /* Insert <n> blank char */
+			DEFAULT(escseq.arg[0], 1);
+			tinsertblank(escseq.arg[0]);
+			break;
+		case 'A': /* Cursor <n> Up */
+		case 'e':
+			DEFAULT(escseq.arg[0], 1);
+			tmoveto(term.c.x, term.c.y-escseq.arg[0]);
+			break;
+		case 'B': /* Cursor <n> Down */
+			DEFAULT(escseq.arg[0], 1);
+			tmoveto(term.c.x, term.c.y+escseq.arg[0]);
+			break;
+		case 'C': /* Cursor <n> Forward */
+		case 'a':
+			DEFAULT(escseq.arg[0], 1);
+			tmoveto(term.c.x+escseq.arg[0], term.c.y);
+			break;
+		case 'D': /* Cursor <n> Backward */
+			DEFAULT(escseq.arg[0], 1);
+			tmoveto(term.c.x-escseq.arg[0], term.c.y);
+			break;
+		case 'E': /* Cursor <n> Down and first col */
+			DEFAULT(escseq.arg[0], 1);
+			tmoveto(0, term.c.y+escseq.arg[0]);
+			break;
+		case 'F': /* Cursor <n> Up and first col */
+			DEFAULT(escseq.arg[0], 1);
+			tmoveto(0, term.c.y-escseq.arg[0]);
+			break;
+		case 'G': /* Move to <col> */
+		case '`':
+			DEFAULT(escseq.arg[0], 1);
+			tmoveto(escseq.arg[0]-1, term.c.y);
+			break;
+		case 'H': /* Move to <row> <col> */
+		case 'f':
+			DEFAULT(escseq.arg[0], 1);
+			DEFAULT(escseq.arg[1], 1);
+			tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
+			break;
+		case 'J': /* Clear screen */
+			switch(escseq.arg[0]) {
+			case 0: /* below */
+				tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
+				break;
+			case 1: /* above */
+				tclearregion(0, 0, term.c.x, term.c.y);
+				break;
+			case 2: /* all */
+				tclearregion(0, 0, term.col-1, term.row-1);
+				break;                
+			}
+			break;
+		case 'K': /* Clear line */
+			switch(escseq.arg[0]) {
+			case 0: /* right */
+				tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
+				break;
+			case 1: /* left */
+				tclearregion(0, term.c.y, term.c.x, term.c.y);
+				break;
+			case 2: /* all */
+				tclearregion(0, term.c.y, term.col-1, term.c.y);
+				break;
+			}
+			break;
+		case 'L': /* Insert <n> blank lines */
+			DEFAULT(escseq.arg[0], 1);
+			tinsertblankline(escseq.arg[0]);
+			break;
+		case 'M': /* Delete <n> lines */
+			DEFAULT(escseq.arg[0], 1);
+			tdeleteline(escseq.arg[0]);
+			break;
+		case 'P': /* Delete <n> char */
+			DEFAULT(escseq.arg[0], 1);
+			tdeletechar(escseq.arg[0]);
+			break;
+		case 'd': /* Move to <row> */
+			DEFAULT(escseq.arg[0], 1);
+			tmoveto(term.c.x, escseq.arg[0]-1);
+			break;
+		case 'h': /* Set terminal mode */
+			break;
+		case 'm': /* Terminal attribute (color) */
+			tsetattr(escseq.arg, escseq.narg);
+			break;
+		case 'r':
+			if(escseq.priv)
+				;
+			else {
+				DEFAULT(escseq.arg[0], 1);
+				DEFAULT(escseq.arg[1], term.row);
+				tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
+			}
+			break;
+		case 's': /* Save cursor position */
+			tcpos(CSsave);
+			break;
+		case 'u': /* Load cursor position */
+			tcpos(CSload);
+			break;
+		}
+		break;
+	}
+}
+
+void
+escdump(void) { 
+	int i;
+	puts("------");
+	printf("rawbuf  : %s\n", escseq.buf);
+	printf("prechar : %c\n", escseq.pre);
+	printf("private : %c\n", escseq.priv ? '?' : ' ');
+	printf("narg    : %d\n", escseq.narg);
+	if(escseq.narg) {
+		for(i = 0; i < escseq.narg; i++)
+			printf("\targ %d = %d\n", i, escseq.arg[i]);
+	}
+	printf("mode    : %c\n", escseq.mode);
+}
+
+void
+escreset(void) {
+	memset(&escseq, 0, sizeof(escseq));
+}
+
+void
+tputc(char c) {
+	static int inesc = 0;
+
+	dump(c);
+	/* start of escseq */
+	if(c == '\033')
+		escreset(), inesc = 1;
+	else if(inesc) {
+		inesc = escaddc(c);
+	} /* normal char */ 
+	else switch(c) { 
+		default:
+			tsetchar(c);
+			tcursor(CSright);
+			break;
+		case '\b':
+			tcursor(CSleft);
+			break;
+		case '\r':
+			tmoveto(0, term.c.y);
+			break;
+		case '\n':
+			tnewline();
+			break;
+		case '\a':
+			xbell();
+			break;
+	}
+}
+
+void
+tputs(char *s, int len) { 
+	for(; len > 0; len--)
+		tputc(*s++);
+}
+
+void
+tdump(void) {
+	int row, col;
+	Glyph c;
+
+	for(row = 0; row < term.row; row++) {
+		for(col = 0; col < term.col; col++) {
+			if(col == term.c.x && row == term.c.y)
+				putchar('#');
+			else {
+				c = term.line[row][col];
+				putchar(c.state & CRset ? c.c : '.');
+			}
+		}
+		putchar('\n');
+	}
+}
+
+void
+tresize(int col, int row) {
+	int i;
+	Line *line;
+	int minrow = MIN(row, term.row);
+	int mincol = MIN(col, term.col);
+
+	if(col < 1 || row < 1)
+		return;
+	line = calloc(row, sizeof(Line));
+	for(i = 0 ; i < row; i++)
+		line[i] = calloc(col, sizeof(Glyph));
+	for(i = 0 ; i < minrow; i++) {
+		memcpy(line[i], term.line[i], mincol * sizeof(Glyph));
+		free(term.line[i]);
+	}
+	free(term.line);
+	LIMIT(term.c.x, 0, col-1);
+	LIMIT(term.c.y, 0, row-1);
+	LIMIT(term.top, 0, row-1);
+	LIMIT(term.bot, 0, row-1);
+	//    if(term.bot == term.row-1)
+	term.bot = row-1;
+	term.line = line;
+	term.col = col, term.row = row;
+}
+
+unsigned long
+xgetcol(const char *s) {
+	XColor color;
+	Colormap cmap = DefaultColormap(xw.dis, xw.scr);
+
+	if(!XAllocNamedColor(xw.dis, cmap, s, &color, &color)) {
+		color.pixel = WhitePixel(xw.dis, xw.scr);
+		fprintf(stderr, "Could not allocate color '%s'\n", s);
+	}
+	return color.pixel;
+}
+
+
+void
+xclear(int x1, int y1, int x2, int y2) {
+	XClearArea(xw.dis, xw.win, 
+			x1 * xw.cw, y1 * xw.ch, 
+			(x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch, 
+			False);
+}
+
+
+void
+xscroll(void) {
+	int srcy = (term.top+1) * xw.ch;
+	int dsty = term.top * xw.ch;
+	int height = (term.bot-term.top) * xw.ch;
+
+	xcursor(CShide);
+	XCopyArea(xw.dis, xw.win, xw.win, dc.gc, 0, srcy, xw.w, height, 0, dsty);
+	xclear(0, term.bot, term.col-1, term.bot);
+}
+
+
+
+
+void
+xinit(void) {
+	XGCValues values;
+	unsigned long valuemask;
+	XClassHint chint;
+	XWMHints wmhint;
+	XSizeHints shint;
+	char *args[] = {NULL};
+	int i;
+
+	xw.dis = XOpenDisplay(NULL);
+	xw.scr = XDefaultScreen(xw.dis);
+	/* font */
+	dc.font = XLoadQueryFont(xw.dis, FONT);
+	xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
+	xw.ch = dc.font->ascent + dc.font->descent + LINESPACE;
+	/* colors */
+	for(i = 0; i < LEN(colorname); i++)
+		dc.col[i] = xgetcol(colorname[i]);
+	term.c.attr.fg = DefaultFG;
+	term.c.attr.bg = DefaultBG;
+	term.c.attr.mode = ATnone;
+	/* windows */
+	xw.h = term.row * xw.ch;
+	xw.w = term.col * xw.cw;
+	/* XXX: this BORDER is useless after the first resize, handle it in xdraws() */
+	xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
+			xw.w, xw.h, BORDER, 
+			dc.col[DefaultBG],
+			dc.col[DefaultBG]);
+	/* gc */
+	values.foreground = XWhitePixel(xw.dis, xw.scr);
+	values.font = dc.font->fid;
+	valuemask = GCForeground | GCFont;
+	dc.gc = XCreateGC(xw.dis, xw.win, valuemask, &values);
+	XMapWindow(xw.dis, xw.win);
+	/* wm stuff */
+	chint.res_name = TNAME, chint.res_class = TNAME;
+	wmhint.input = 1, wmhint.flags = InputHint;
+	shint.height_inc = xw.ch, shint.width_inc = xw.cw;
+	shint.height = xw.h, shint.width = xw.w;
+	shint.flags = PSize | PResizeInc;
+	XSetWMProperties(xw.dis, xw.win, NULL, NULL, &args[0], 0, &shint, &wmhint, &chint);
+	XStoreName(xw.dis, xw.win, TNAME);
+	XSync(xw.dis, 0);
+}
+
+void
+xdrawc(int x, int y, Glyph g) {
+	XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
+	unsigned long xfg, xbg;
+
+	/* reverse video */
+	if(g.mode & ATreverse)
+		xfg = dc.col[g.bg], xbg = dc.col[g.fg];
+	else
+		xfg = dc.col[g.fg], xbg = dc.col[g.bg];
+	/* background */
+	XSetForeground(xw.dis, dc.gc, xbg);
+	XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
+	/* string */
+	XSetForeground(xw.dis, dc.gc, xfg);
+	XDrawString(xw.dis, xw.win, dc.gc, r.x, r.y+dc.font->ascent, &(g.c), 1);
+	if(g.mode & ATbold)  /* XXX: bold hack (draw again at x+1) */
+		XDrawString(xw.dis, xw.win, dc.gc, r.x+1, r.y+dc.font->ascent, &(g.c), 1);
+	/* underline */
+	if(g.mode & ATunderline) {
+		r.y += dc.font->ascent + 1;
+		XDrawLine(xw.dis, xw.win, dc.gc, r.x, r.y, r.x+r.width-1, r.y);
+	}
+}
+
+void
+xcursor(int mode) {
+	static int oldx = 0;
+	static int oldy = 0;
+	Glyph g = {' ', ATnone, DefaultBG, DefaultCS, 0};
+
+	if(term.line[term.c.y][term.c.x].state & CRset)
+		g.c = term.line[term.c.y][term.c.x].c;
+	/* remove the old cursor */
+	if(term.line[oldy][oldx].state & CRset)
+		xdrawc(oldx, oldy, term.line[oldy][oldx]);
+	else xclear(oldx, oldy, oldx, oldy); /* XXX: maybe a bug */
+	if(mode == CSdraw && !term.c.hidden) {
+		xdrawc(term.c.x, term.c.y, g);
+		oldx = term.c.x, oldy = term.c.y;
+	}
+}
+
+
+void
+draw(int redraw_all) {
+	int x, y;
+	int changed, set;
+
+	if(redraw_all)
+		XClearWindow(xw.dis, xw.win);
+	/* XXX: drawing could be optimised */
+	for(y = 0; y < term.row; y++) {
+		for(x = 0; x < term.col; x++) {
+			changed = term.line[y][x].state & CRupdate;
+			set = term.line[y][x].state & CRset;
+			if((changed && set) || (redraw_all && set)) {
+				term.line[y][x].state &= ~CRupdate;
+				xdrawc(x, y, term.line[y][x]);
+			}
+		}
+	}
+	xcursor(CSdraw);
+}
+
+void
+kpress(XKeyEvent *e) {
+	KeySym ksym;
+	char buf[32];
+	int len;
+	int meta;
+	int shift;
+
+	meta  = e->state & Mod4Mask;
+	shift = e->state & ShiftMask;
+	len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
+	if(len > 0) {
+		buf[sizeof(buf)-1] = '\0';
+		if(meta && len == 1)
+			ttywrite("\033", 1);
+		ttywrite(buf, len);
+		return;
+	}
+	switch(ksym) {
+#ifdef DEBUG1
+	default:
+		printf("errkey: %d\n", (int)ksym);
+		break;
+#endif
+	case XK_Up:
+	case XK_Down:
+	case XK_Left:
+	case XK_Right:
+		sprintf(buf, "\033[%c", "DACB"[ksym - XK_Left]);
+		ttywrite(buf, 3);
+		break;
+	case XK_Delete: ttywrite(KEYDELETE, sizeof(KEYDELETE)-1); break;
+	case XK_Home:   ttywrite(  KEYHOME, sizeof(  KEYHOME)-1); break;
+	case XK_End:    ttywrite(   KEYEND, sizeof(   KEYEND)-1); break;
+	case XK_Prior:	ttywrite(  KEYPREV, sizeof(  KEYPREV)-1); break;
+	case XK_Next:	ttywrite(  KEYNEXT, sizeof(  KEYNEXT)-1); break;
+	case XK_Insert:
+		/* XXX: paste X clipboard */
+		if(shift);
+		break;
+	}
+}
+
+void
+resize(XEvent *e) {
+	int col, row;
+	col = e->xconfigure.width / xw.cw;
+	row = e->xconfigure.height / xw.ch;
+    
+	if(term.col != col && term.row != row) {
+		tresize(col, row);
+		ttyresize(col, row);
+		xw.w = e->xconfigure.width;
+		xw.h = e->xconfigure.height;
+		draw(SCredraw);
+	}
+}
+
+
+void
+run(void) {
+	int ret;
+	XEvent ev;
+	fd_set rfd;
+	struct timeval tv = {0, 10000};
+
+	running = 1;
+	XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
+	XResizeWindow(xw.dis, xw.win, xw.w , xw.h); /* seems to fix the resize bug in wmii */
+	while(running) {
+		while(XPending(xw.dis)) {
+			XNextEvent(xw.dis, &ev);
+			switch (ev.type) {
+			default:
+				break;
+			case KeyPress:
+				kpress(&ev.xkey);
+				break;
+			case Expose:
+				draw(SCredraw);
+				break;
+			case ConfigureNotify:
+				resize(&ev);
+				break;
+			}
+		}
+		FD_ZERO(&rfd);
+		FD_SET(cmdfd, &rfd);
+		ret = select(cmdfd+1, &rfd, NULL, NULL, &tv);
+		if(ret < 0) {
+			fprintf(stderr, "select: %m\n");
+			running = 0;
+		}
+		if(!ret)
+			continue;
+		if(FD_ISSET(cmdfd, &rfd)) {
+			ttyread();
+			draw(SCupdate);
+		}
+	}
+}
+
+int
+main(int argc, char *argv[]) {
+	if(argc == 2 && !strncmp("-v", argv[1], 3))
+		die("st-"VERSION", © 2009 st engineers\n");
+	else if(argc != 1)
+		die("usage: st [-v]\n");
+	setlocale(LC_CTYPE, "");
+	tnew(80, 24);
+	ttynew();
+	xinit();
+	run();
 	return 0;
 }
diff --git a/st.h b/st.h
new file mode 100644
index 0000000..be39ef4
--- /dev/null
+++ b/st.h
@@ -0,0 +1,181 @@
+/* See LICENSE for licence details. */
+
+#define _XOPEN_SOURCE
+#include <ctype.h>
+#include <fcntl.h>
+#include <locale.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/select.h>
+#include <sys/ioctl.h>
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#include <X11/Xutil.h>
+
+/* special keys */
+#define KEYDELETE "\033[3~"
+#define KEYHOME   "\033[1~"
+#define KEYEND    "\033[4~"
+#define KEYPREV   "\033[5~"
+#define KEYNEXT   "\033[6~"
+
+#define TNAME "st"
+#define SHELL "/bin/bash"
+#define TAB    8
+
+#define FONT "-*-terminus-medium-r-normal-*-14-*-*-*-*-*-*-*"
+#define BORDER 3
+#define LINESPACE 1 /* additional pixel between each line */
+
+/* Default colors */
+#define DefaultFG 7
+#define DefaultBG 0
+#define DefaultCS 1
+#define BellCol   DefaultFG /* visual bell color */
+
+static char* colorname[] = {
+	"black",
+	"red",
+	"green",
+	"yellow",
+	"blue",
+	"magenta",
+	"cyan",
+	"white",
+};
+
+
+/* Arbitrary sizes */
+#define ESCSIZ 256
+#define ESCARG 16
+
+#define MIN(a, b)  ((a) < (b) ? (a) : (b))
+#define MAX(a, b)  ((a) < (b) ? (b) : (a))
+#define LEN(a)     (sizeof(a) / sizeof(a[0]))
+#define DEFAULT(a, b)     (a) = (a) ? (a) : (b)    
+#define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
+#define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
+
+
+enum { ATnone=0 , ATreverse=1 , ATunderline=2, ATbold=4 }; /* Attribute */
+enum { CSup, CSdown, CSright, CSleft, CShide, CSdraw, CSwrap, CSsave, CSload }; /* Cursor */
+enum { CRset=1 , CRupdate=2 }; /* Character state */
+enum { TMwrap=1 , TMinsert=2 }; /* Terminal mode */
+enum { SCupdate, SCredraw }; /* screen draw mode */
+
+#ifdef TRUECOLOR
+#error Truecolor not implemented yet
+typedef int Color;
+#else
+typedef char Color;
+#endif
+
+
+typedef struct {
+	char c;     /* character code  */
+	char mode;  /* attribute flags */
+	Color fg;   /* foreground      */
+	Color bg;   /* background      */
+	char state; /* state flag      */
+} Glyph;
+
+typedef Glyph* Line;
+
+typedef struct {
+	Glyph attr;  /* current char attributes */
+	char hidden;
+	int x;
+	int y;
+} TCursor;
+
+/* Escape sequence structs */
+typedef struct {
+	char buf[ESCSIZ+1]; /* raw string */
+	int len;            /* raw string length */
+	/* ESC <pre> [[ [<priv>] <arg> [;]] <mode>] */
+	char pre;           
+	char priv;
+	int arg[ESCARG+1];
+	int narg;           /* nb of args */
+	char mode;
+} Escseq;
+
+/* Internal representation of the screen */
+typedef struct {
+	int row;    /* nb row */  
+	int col;    /* nb col */
+	Line* line; /* screen */
+	TCursor c;  /* cursor */
+	int top;    /* top    scroll limit */
+	int bot;    /* bottom scroll limit */
+	int mode;   /* terminal mode */
+} Term;
+
+/* Purely graphic info */
+typedef struct {
+	Display* dis;
+	Window win;
+	int scr;
+	int w;  /* window width  */
+	int h;  /* window height */
+	int ch; /* char height */
+	int cw; /* char width  */
+} XWindow; 
+
+/* Drawing Context */
+typedef struct {
+	unsigned long col[LEN(colorname)];
+	XFontStruct* font;
+	GC gc;
+} DC;
+
+
+void die(const char *errstr, ...);
+void draw(int);
+void execsh(void);
+void kpress(XKeyEvent *);
+void resize(XEvent *);
+void run(void);
+
+int escaddc(char);
+int escfinal(char);
+void escdump(void);
+void eschandle(void);
+void escparse(void);
+void escreset(void);
+
+void tclearregion(int, int, int, int);
+void tcpos(int);
+void tcursor(int);
+void tdeletechar(int);
+void tdeleteline(int);
+void tdump(void);
+void tinsertblank(int);
+void tinsertblankline(int);
+void tmoveto(int, int);
+void tnew(int, int);
+void tnewline(void);
+void tputc(char);
+void tputs(char*, int);
+void tresize(int, int);
+void tscroll(void);
+void tsetattr(int*, int);
+void tsetchar(char);
+void tsetscroll(int, int);
+
+void ttynew(void);
+void ttyread(void);
+void ttyresize(int, int);
+void ttywrite(char *, size_t);
+
+unsigned long xgetcol(const char *);
+void xclear(int, int, int, int);
+void xcursor(int);
+void xdrawc(int, int, Glyph);
+void xinit(void);
+void xscroll(void);
diff --git a/st.info b/st.info
new file mode 100644
index 0000000..1ded6b5
--- /dev/null
+++ b/st.info
@@ -0,0 +1,54 @@
+#	Reconstructed via infocmp from file: /lib/terminfo/p/pcansi
+st| simpleterm,
+	am,
+    ul,
+	mir,
+	msgr,
+	colors#8,
+	cols#80,
+	it#8,
+	lines#24,
+	ncv#3,
+	pairs#64,
+    acsc=*`#aof+g+j+k+l+m+n-o-p-q-r-s+t+u+v+w|x<y>z{{||}}-~,
+	bel=^G,
+	bold=\E[1m,
+	cbt=\E[Z,
+	clear=\E[H\E[2J,
+	cr=^M,
+	cub1=\E[D,
+	cud1=\E[B,
+	cuf1=\E[C,
+	cup=\E[%i%p1%d;%p2%dH,
+	cuu1=\E[A,
+	dch1=\E[P,
+	dl1=\E[M,
+	ed=\E[J,
+	el=\E[K,
+	home=\E[H,
+	ht=^I,
+	hts=\EH,
+	il1=\E[L,
+	ind=^J,
+	invis=\E[8m,
+	kbs=^H,
+	kcub1=\E[D,
+	kcud1=\E[B,
+	kcuf1=\E[C,
+	kcuu1=\E[A,
+	khome=\E[1~,
+    knp=\E[6~,
+    kpp=\E[5~,
+	op=\E[37;40m,
+	rev=\E[7m,
+	rmacs=\E[10m,
+	rmso=\E[m,
+	rmul=\E[m,
+	setab=\E[4%p1%dm,
+	setaf=\E[3%p1%dm,
+#	sgr=\E[0;10%?%p1%t;7%;%?%p2%t;4%;%?%p3%t;7%;%?%p4%t;5%;%?%p6%t;1%;%?%p7%t;8%;%?%p9%t;12%;m,
+	sgr0=\E[0m,
+	smacs=\E[12m,
+	smso=\E[7m,
+	smul=\E[4m,
+	tbc=\E[2g,
diff --git a/std.c b/std.c
deleted file mode 100644
index 55da9d6..0000000
--- a/std.c
+++ /dev/null
@@ -1,363 +0,0 @@
-/* See LICENSE file for copyright and license details.
- *
- * Simple terminal daemon is a terminal emulator. It can be used in
- * combination with simple terminal to emulate a mostly VT100-compatible
- * terminal.
- * 
- * In this process std works like a filter. It reads data from a
- * pseudo-terminal and parses the escape sequences and transforms them
- * into an ed(1)-like language. The resulting data is buffered and
- * written to stdout.
- * Parallely it reads data from stdin and parses and executes the
- * commands. The resulting data is written to the pseudo-terminal.
- */
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <ctype.h>
-#include <err.h>
-#include <errno.h>
-#include <fcntl.h>
-#if !(_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600)
-#include <pty.h>
-#endif
-#include <signal.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#define LENGTH(x)	(sizeof(x) / sizeof((x)[0]))
-#define MAX(a,b)	(((a) > (b)) ? (a) : (b))
-#define MIN(a,b)	(((a) < (b)) ? (a) : (b))
-
-typedef struct {
-	unsigned char data[BUFSIZ];
-	int s, e;
-	int n;
-} RingBuffer;
-
-static void buffer(char c);
-static void cmd(const char *cmdstr, ...);
-static void getpty(void);
-static void movea(int x, int y);
-static void mover(int x, int y);
-static void parsecmd(void);
-static void parseesc(void);
-static void scroll(int l);
-static void shell(void);
-static void sigchld(int n);
-static char unbuffer(void);
-
-static int cols = 80, lines = 25;
-static int cx = 0, cy = 0;
-static int c;
-static int ptm, pts;
-static _Bool bold, digit, qmark;
-static pid_t pid;
-static RingBuffer buf;
-static FILE *fptm;
-
-void
-buffer(char c) {
-	if(buf.n < LENGTH(buf.data))
-		buf.n++;
-	else
-		buf.s = (buf.s + 1) % LENGTH(buf.data);
-	buf.data[buf.e++] = c;
-	buf.e %= LENGTH(buf.data);
-}
-
-void
-cmd(const char *cmdstr, ...) {
-	va_list ap;
-
-	putchar('\n');
-	putchar(':');
-	va_start(ap, cmdstr);
-	vfprintf(stdout, cmdstr, ap);
-	va_end(ap);
-}
-
-void
-movea(int x, int y) {
-	x = MAX(x, cols);
-	y = MAX(y, lines);
-	cx = x;
-	cy = y;
-	cmd("seek(%d,%d)", x, y);
-}
-
-void
-mover(int x, int y) {
-	movea(cx + x, cy + y);
-}
-
-void
-parsecmd(void) {
-}
-
-void
-parseesc(void) {
-	int i, j;
-	int arg[16];
-
-	memset(arg, 0, LENGTH(arg));
-	c = getc(fptm);
-	switch(c) {
-	case '[':
-		c = getc(fptm);
-		for(j = 0; j < LENGTH(arg);) {
-			if(isdigit(c)) {
-				digit = 1;
-				arg[j] *= 10;
-				arg[j] += c - '0';
-			}
-			else if(c == '?')
-				qmark = 1;
-			else if(c == ';') {
-				if(!digit)
-					errx(EXIT_FAILURE, "syntax error");
-				digit = 0;
-				j++;
-			}
-			else {
-				if(digit) {
-					digit = 0;
-					j++;
-				}
-				break;
-			}
-			c = getc(fptm);
-		}
-		switch(c) {
-		case '@':
-			break;
-		case 'A':
-			mover(0, j ? arg[0] : 1);
-			break;
-		case 'B':
-			mover(0, j ? -arg[0] : -1);
-			break;
-		case 'C':
-			mover(j ? arg[0] : 1, 0);
-			break;
-		case 'D':
-			mover(j ? -arg[0] : -1, 0);
-			break;
-		case 'E':
-			/* movel(j ? arg[0] : 1); */
-			break;
-		case 'F':
-			/* movel(j ? -arg[0] : -1); */
-			break;
-		case '`':
-		case 'G':
-			movea(j ? arg[0] : 1, cy);
-			break;
-		case 'f':
-		case 'H':
-			movea(arg[1] ? arg[1] : 1, arg[0] ? arg[0] : 1);
-		case 'L':
-			/* insline(j ? arg[0] : 1); */
-			break;
-		case 'M':
-			/* delline(j ? arg[0] : 1); */
-			break;
-		case 'P':
-			break;
-		case 'S':
-			scroll(j ? arg[0] : 1);
-			break;
-		case 'T':
-			scroll(j ? -arg[0] : -1);
-			break;
-		case 'd':
-			movea(cx, j ? arg[0] : 1);
-			break;
-		case 'm':
-			for(i = 0; i < j; i++) {
-				if(arg[i] >= 30 && arg[i] <= 37)
-					cmd("#%d", arg[i] - 30);
-				if(arg[i] >= 40 && arg[i] <= 47)
-					cmd("|%d", arg[i] - 40);
-				/* xterm bright colors */
-				if(arg[i] >= 90 && arg[i] <= 97)
-					cmd("#%d", arg[i] - 90);
-				if(arg[i] >= 100 && arg[i] <= 107)
-					cmd("|%d", arg[i] - 100);
-				switch(arg[i]) {
-				case 0:
-				case 22:
-					if(bold)
-						cmd("bold");
-				case 1:
-					if(!bold)
-						cmd("bold");
-					break;
-				}
-			}
-			break;
-		}
-		break;
-	default:
-		putchar('\033');
-		ungetc(c, fptm);
-	}
-}
-
-void
-scroll(int l) {
-	cmd("seek(%d,%d)", cx, cy + l);
-}
-
-void
-getpty(void) {
-	char *ptsdev;
-
-#if defined(_GNU_SOURCE)
-	ptm = getpt();
-#elif _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600
-	ptm = posix_openpt(O_RDWR);
-#else
-	ptm = open("/dev/ptmx", O_RDWR);
-	if(ptm == -1)
-		if(openpty(&ptm, &pts, NULL, NULL, NULL) == -1)
-			err(EXIT_FAILURE, "cannot open pty");
-#endif
-#if defined(_XOPEN_SOURCE)
-	if(ptm != -1) {
-		if(grantpt(ptm) == -1)
-			err(EXIT_FAILURE, "cannot grant access to pty");
-		if(unlockpt(ptm) == -1)
-			err(EXIT_FAILURE, "cannot unlock pty");
-		ptsdev = ptsname(ptm);
-		if(!ptsdev)
-			err(EXIT_FAILURE, "slave pty name undefined");
-		pts = open(ptsdev, O_RDWR);
-		if(pts == -1)
-			err(EXIT_FAILURE, "cannot open slave pty");
-	}
-	else
-		err(EXIT_FAILURE, "cannot open pty");
-#endif
-}
-
-void
-shell(void) {
-	static char *shell = NULL;
-
-	if(!shell && !(shell = getenv("SHELL")))
-		shell = "/bin/sh";
-	pid = fork();
-	switch(pid) {
-	case -1:
-		err(EXIT_FAILURE, "cannot fork");
-	case 0:
-		setsid();
-		dup2(pts, STDIN_FILENO);
-		dup2(pts, STDOUT_FILENO);
-		dup2(pts, STDERR_FILENO);
-		close(ptm);
-		putenv("TERM=vt102");
-		execvp(shell, NULL);
-		break;
-	default:
-		close(pts);
-		signal(SIGCHLD, sigchld);
-	}
-}
-
-void
-sigchld(int n) {
-	int ret;
-
-	if(waitpid(pid, &ret, 0) == -1)
-		err(EXIT_FAILURE, "waiting for child failed");
-	if(WIFEXITED(ret))
-		exit(WEXITSTATUS(ret));
-	else
-		exit(EXIT_SUCCESS);
-}
-
-char
-unbuffer(void) {
-	char c;
-
-	c = buf.data[buf.s++];
-	buf.s %= LENGTH(buf.data);
-	buf.n--;
-	return c;
-}
-
-int
-main(int argc, char *argv[]) {
-	fd_set rfds;
-
-	if(argc == 2 && !strcmp("-v", argv[1]))
-		errx(EXIT_SUCCESS, "std-"VERSION", © 2008 Matthias-Christian Ott");
-	else if(argc == 1)
-		errx(EXIT_FAILURE, "usage: std [-v]");
-	getpty();
-	shell();
-	FD_ZERO(&rfds);
-	FD_SET(STDIN_FILENO, &rfds);
-	FD_SET(ptm, &rfds);
-	if(!(fptm = fdopen(ptm, "r+")))
-		err(EXIT_FAILURE, "cannot open pty");
-	if(fcntl(ptm, F_SETFL, O_NONBLOCK) == -1)
-		err(EXIT_FAILURE, "cannot set pty to non-blocking mode");
-	if(fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK) == -1)
-		err(EXIT_FAILURE, "cannot set stdin to non-blocking mode");
-	for(;;) {
-		if(select(MAX(ptm, STDIN_FILENO) + 1, &rfds, NULL, NULL, NULL) == -1)
-			err(EXIT_FAILURE, "cannot select");
-		if(FD_ISSET(ptm, &rfds)) {
-			for(;;) {
-				if((c = getc(fptm)) == EOF) {
-					if(feof(fptm)) {
-						FD_CLR(ptm, &rfds);
-						fflush(fptm);
-						break;
-					}
-					if(errno != EAGAIN)
-						err(EXIT_FAILURE, "cannot read from pty");
-					fflush(stdout);
-					break;
-				}
-				switch(c) {
-				case '\033':
-					parseesc();
-					break;
-				default:
-					putchar(c);
-				}
-			}
-			fflush(stdout);
-		}
-		if(FD_ISSET(STDIN_FILENO, &rfds)) {
-			for(;;) {
-				if((c = getchar()) == EOF) {
-					if(feof(stdin)) {
-						FD_CLR(STDIN_FILENO, &rfds);
-						fflush(fptm);
-						break;
-					}
-					if(errno != EAGAIN)
-						err(EXIT_FAILURE, "cannot read from stdin");
-					fflush(fptm);
-					break;
-				}
-				switch(c) {
-				case ':':
-					parsecmd();
-					break;
-				default:
-					putc(c, fptm);
-				}
-			}
-			fflush(fptm);
-		}
-	}
-	return 0;
-}
-- 
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