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diff --git a/LICENSE b/LICENSE
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--- a/LICENSE
+++ b/LICENSE
@@ -1,674 +1,23 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
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- Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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-  16. Limitation of Liability.
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-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    <program>  Copyright (C) <year>  <name of author>
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<https://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<https://www.gnu.org/licenses/why-not-lgpl.html>.
+MIT/X Consortium License
+
+© 2009-2011 Enno Boland <g s01 de>
+© 2011 Connor Lane Smith <cls@lubutu.com>
+© 2012 Christoph Lohmann <20h@r-36.net> 
+
+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.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..32cc25b
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,60 @@
+# tabbed - tabbing interface
+# See LICENSE file for copyright and license details.
+
+include config.mk
+
+SRC = tabbed.c
+OBJ = ${SRC:.c=.o}
+
+all: options tabbed
+
+options:
+	@echo tabbed build options:
+	@echo "CFLAGS   = ${CFLAGS}"
+	@echo "LDFLAGS  = ${LDFLAGS}"
+	@echo "CC       = ${CC}"
+
+.c.o:
+	@echo CC $<
+	@${CC} -c ${CFLAGS} $<
+
+${OBJ}: config.h config.mk
+
+config.h:
+	@echo creating $@ from config.def.h
+	@cp config.def.h $@
+
+tabbed: tabbed.o
+	@echo CC -o $@
+	@${CC} -o $@ tabbed.o ${LDFLAGS}
+
+clean:
+	@echo cleaning
+	@rm -f tabbed ${OBJ} tabbed-${VERSION}.tar.gz
+
+dist: clean
+	@echo creating dist tarball
+	@mkdir -p tabbed-${VERSION}
+	@cp -R LICENSE Makefile README config.def.h config.mk \
+		tabbed.1 arg.h ${SRC} tabbed-${VERSION}
+	@tar -cf tabbed-${VERSION}.tar tabbed-${VERSION}
+	@gzip tabbed-${VERSION}.tar
+	@rm -rf tabbed-${VERSION}
+
+install: all
+	@echo installing executable file to ${DESTDIR}${PREFIX}/bin
+	@mkdir -p ${DESTDIR}${PREFIX}/bin
+	@cp -f tabbed ${DESTDIR}${PREFIX}/bin
+	@chmod 755 ${DESTDIR}${PREFIX}/bin/tabbed
+	@echo installing manual page to ${DESTDIR}${MANPREFIX}/man1
+	@mkdir -p ${DESTDIR}${MANPREFIX}/man1
+	@sed "s/VERSION/${VERSION}/g" < tabbed.1 > ${DESTDIR}${MANPREFIX}/man1/tabbed.1
+	@chmod 644 ${DESTDIR}${MANPREFIX}/man1/tabbed.1
+
+uninstall:
+	@echo removing executable file from ${DESTDIR}${PREFIX}/bin
+	@rm -f ${DESTDIR}${PREFIX}/bin/tabbed
+	@echo removing manual page from ${DESTDIR}${MANPREFIX}/man1
+	@rm -f ${DESTDIR}${MANPREFIX}/man1/tabbed.1
+
+.PHONY: all options clean dist install uninstall
diff --git a/README b/README
new file mode 100644
index 0000000..4ed6bbe
--- /dev/null
+++ b/README
@@ -0,0 +1,22 @@
+tabbed - generic tabbed interface
+=================================
+tabbed is a simple tabbed X window container.
+
+Requirements
+------------
+In order to build tabbed you need the Xlib header files.
+
+Installation
+------------
+Edit config.mk to match your local setup (tabbed is installed into
+the /usr/local namespace by default).
+
+Afterwards enter the following command to build and install tabbed
+(if necessary as root):
+
+    make clean install
+
+Running tabbed
+--------------
+See the man page for details.
+
diff --git a/TODO b/TODO
new file mode 100644
index 0000000..8e1986d
--- /dev/null
+++ b/TODO
@@ -0,0 +1,4 @@
+# TODO
+* add some way to detach windows
+* add some way to attach windows
+
diff --git a/arg.h b/arg.h
new file mode 100644
index 0000000..a345b0b
--- /dev/null
+++ b/arg.h
@@ -0,0 +1,52 @@
+/* See the LICENSE file for copyright and license details. */
+
+#ifndef __ARG_H__
+#define __ARG_H__
+
+extern char *argv0;
+
+#define USED(x)		((void)(x))
+
+/* use main(int argc, char *argv[]) */
+#define ARGBEGIN	for (argv0 = *argv, argv++, argc--;\
+					argv[0] && argv[0][1]\
+					&& argv[0][0] == '-';\
+					argc--, argv++) {\
+				char _argc;\
+				char **_argv;\
+				int brk;\
+				if (argv[0][1] == '-' && argv[0][2] == '\0') {\
+					argv++;\
+					argc--;\
+					break;\
+				}\
+				for (brk = 0, argv[0]++, _argv = argv;\
+						argv[0][0] && !brk;\
+						argv[0]++) {\
+					if (_argv != argv)\
+						break;\
+					_argc = argv[0][0];\
+					switch (_argc)
+
+#define ARGEND			}\
+				USED(_argc);\
+			}\
+			USED(argv);\
+			USED(argc);
+
+#define ARGC()		_argc
+
+#define EARGF(x)	((argv[0][1] == '\0' && argv[1] == NULL)?\
+				((x), abort(), (char *)0) :\
+				(brk = 1, (argv[0][1] != '\0')?\
+					(&argv[0][1]) :\
+					(argc--, argv++, argv[0])))
+
+#define ARGF()		((argv[0][1] == '\0' && argv[1] == NULL)?\
+				(char *)0 :\
+				(brk = 1, (argv[0][1] != '\0')?\
+					(&argv[0][1]) :\
+					(argc--, argv++, argv[0])))
+
+#endif
+
diff --git a/config.def.h b/config.def.h
new file mode 100644
index 0000000..b45bea6
--- /dev/null
+++ b/config.def.h
@@ -0,0 +1,74 @@
+/* See LICENSE file for copyright and license details. */
+
+/* appearance */
+static char font[] =
+    "DejaVuSansMono Nerd Font Mono:pixelsize=14;antialias=true;autohint=true";
+static char *normbgcolor = "#222222";
+static char *normfgcolor = "#cccccc";
+static char *selbgcolor = "#555555";
+static char *selfgcolor = "#ffffff";
+static char *urgbgcolor = "#111111";
+static char *urgfgcolor = "#cc0000";
+static const char before[] = "<";
+static const char after[] = ">";
+static const int tabwidth = 200;
+static const Bool foreground = True;
+
+/*
+ * Where to place a new tab when it is opened. When npisrelative is True,
+ * then the current position is changed + newposition. If npisrelative
+ * is False, then newposition is an absolute position.
+ */
+static int newposition = 0;
+static Bool npisrelative = False;
+
+#define SETPROP(p)                                                             \
+  {                                                                            \
+    .v = (char *[]) {                                                          \
+      "/bin/sh", "-c",                                                         \
+          "prop=\"`xwininfo -children -id $1 | grep '^     0x' | sed -e's@^ "  \
+          "*\\(0x[0-9a-f]*\\) \"\\([^\"]*\\)\".*@\\1 \\2@' | xargs -0 printf " \
+          "%b | dmenu -l 10`\" &&"                                             \
+          "xprop -id $1 -f $0 8s -set $0 \"$prop\"",                           \
+          p, winid, NULL                                                       \
+    }                                                                          \
+  }
+
+/*
+ * Xresources preferences to load at startup
+ */
+ResourcePref resources[] = {
+    {"font", STRING, &font},          {"color0", STRING, &normbgcolor},
+    {"color4", STRING, &normfgcolor}, {"color4", STRING, &selbgcolor},
+    {"color7", STRING, &selfgcolor},  {"color2", STRING, &urgbgcolor},
+    {"color3", STRING, &urgfgcolor},
+};
+
+#define MODKEY ControlMask
+static Key keys[] = {
+    /* modifier                     key        function        argument */
+    {MODKEY | ShiftMask, XK_Return, focusonce, {0}},
+    {MODKEY | ShiftMask, XK_Return, spawn, {0}},
+    {MODKEY, XK_t, spawn, SETPROP("_TABBED_SELECT_TAB")},
+
+    {MODKEY | ShiftMask, XK_l, rotate, {.i = +1}},
+    {MODKEY | ShiftMask, XK_h, rotate, {.i = -1}},
+    {MODKEY | ShiftMask, XK_j, movetab, {.i = -1}},
+    {MODKEY | ShiftMask, XK_k, movetab, {.i = +1}},
+    {MODKEY, XK_Tab, rotate, {.i = 0}},
+
+    {MODKEY, XK_1, move, {.i = 0}},
+    {MODKEY, XK_2, move, {.i = 1}},
+    {MODKEY, XK_3, move, {.i = 2}},
+    {MODKEY, XK_4, move, {.i = 3}},
+    {MODKEY, XK_5, move, {.i = 4}},
+    {MODKEY, XK_6, move, {.i = 5}},
+    {MODKEY, XK_7, move, {.i = 6}},
+    {MODKEY, XK_8, move, {.i = 7}},
+    {MODKEY, XK_9, move, {.i = 8}},
+    {MODKEY, XK_0, move, {.i = 9}},
+
+    {MODKEY, XK_q, killclient, {0}},
+
+    {0, XK_F11, fullscreen, {0}},
+};
diff --git a/config.h b/config.h
new file mode 100644
index 0000000..b45bea6
--- /dev/null
+++ b/config.h
@@ -0,0 +1,74 @@
+/* See LICENSE file for copyright and license details. */
+
+/* appearance */
+static char font[] =
+    "DejaVuSansMono Nerd Font Mono:pixelsize=14;antialias=true;autohint=true";
+static char *normbgcolor = "#222222";
+static char *normfgcolor = "#cccccc";
+static char *selbgcolor = "#555555";
+static char *selfgcolor = "#ffffff";
+static char *urgbgcolor = "#111111";
+static char *urgfgcolor = "#cc0000";
+static const char before[] = "<";
+static const char after[] = ">";
+static const int tabwidth = 200;
+static const Bool foreground = True;
+
+/*
+ * Where to place a new tab when it is opened. When npisrelative is True,
+ * then the current position is changed + newposition. If npisrelative
+ * is False, then newposition is an absolute position.
+ */
+static int newposition = 0;
+static Bool npisrelative = False;
+
+#define SETPROP(p)                                                             \
+  {                                                                            \
+    .v = (char *[]) {                                                          \
+      "/bin/sh", "-c",                                                         \
+          "prop=\"`xwininfo -children -id $1 | grep '^     0x' | sed -e's@^ "  \
+          "*\\(0x[0-9a-f]*\\) \"\\([^\"]*\\)\".*@\\1 \\2@' | xargs -0 printf " \
+          "%b | dmenu -l 10`\" &&"                                             \
+          "xprop -id $1 -f $0 8s -set $0 \"$prop\"",                           \
+          p, winid, NULL                                                       \
+    }                                                                          \
+  }
+
+/*
+ * Xresources preferences to load at startup
+ */
+ResourcePref resources[] = {
+    {"font", STRING, &font},          {"color0", STRING, &normbgcolor},
+    {"color4", STRING, &normfgcolor}, {"color4", STRING, &selbgcolor},
+    {"color7", STRING, &selfgcolor},  {"color2", STRING, &urgbgcolor},
+    {"color3", STRING, &urgfgcolor},
+};
+
+#define MODKEY ControlMask
+static Key keys[] = {
+    /* modifier                     key        function        argument */
+    {MODKEY | ShiftMask, XK_Return, focusonce, {0}},
+    {MODKEY | ShiftMask, XK_Return, spawn, {0}},
+    {MODKEY, XK_t, spawn, SETPROP("_TABBED_SELECT_TAB")},
+
+    {MODKEY | ShiftMask, XK_l, rotate, {.i = +1}},
+    {MODKEY | ShiftMask, XK_h, rotate, {.i = -1}},
+    {MODKEY | ShiftMask, XK_j, movetab, {.i = -1}},
+    {MODKEY | ShiftMask, XK_k, movetab, {.i = +1}},
+    {MODKEY, XK_Tab, rotate, {.i = 0}},
+
+    {MODKEY, XK_1, move, {.i = 0}},
+    {MODKEY, XK_2, move, {.i = 1}},
+    {MODKEY, XK_3, move, {.i = 2}},
+    {MODKEY, XK_4, move, {.i = 3}},
+    {MODKEY, XK_5, move, {.i = 4}},
+    {MODKEY, XK_6, move, {.i = 5}},
+    {MODKEY, XK_7, move, {.i = 6}},
+    {MODKEY, XK_8, move, {.i = 7}},
+    {MODKEY, XK_9, move, {.i = 8}},
+    {MODKEY, XK_0, move, {.i = 9}},
+
+    {MODKEY, XK_q, killclient, {0}},
+
+    {0, XK_F11, fullscreen, {0}},
+};
diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..037f9d7
--- /dev/null
+++ b/config.mk
@@ -0,0 +1,25 @@
+# tabbed version
+VERSION = 0.6
+
+# Customize below to fit your system
+
+# paths
+PREFIX = /usr/local
+MANPREFIX = ${PREFIX}/share/man
+
+# includes and libs
+INCS = -I. -I/usr/include -I/usr/include/freetype2
+LIBS = -L/usr/lib -lc -lX11 -lfontconfig -lXft
+
+# flags
+CPPFLAGS = -DVERSION=\"${VERSION}\" -D_BSD_SOURCE
+CFLAGS = -std=c99 -pedantic -Wall -O0 ${INCS} ${CPPFLAGS}
+LDFLAGS = -s ${LIBS}
+
+# Solaris
+#CFLAGS = -fast ${INCS} -DVERSION=\"${VERSION}\"
+#LDFLAGS = ${LIBS}
+
+# compiler and linker
+CC = cc
+
diff --git a/tabbed-0.6-xft.diff b/tabbed-0.6-xft.diff
new file mode 100644
index 0000000..a6ed881
--- /dev/null
+++ b/tabbed-0.6-xft.diff
@@ -0,0 +1,19 @@
+@@ -1040,15 +1000,9 @@ spawn(const Arg *arg) {
+ 
+ int
+ textnw(const char *text, unsigned int len) {
+-	XRectangle r;
+-
+-	if(dc.font.set) {
+-		XmbTextExtents(dc.font.set, text, len, NULL, &r);
+-
+-		return r.width;
+-	}
+-
+-	return XTextWidth(dc.font.xfont, text, len);
++	XGlyphInfo ext;
++	XftTextExtentsUtf8(dpy, dc.font.xfont, (XftChar8 *) text, len, &ext);
++	return ext.xOff;
+ }
+ 
+ void
diff --git a/tabbed-clientnumber-0.6.diff b/tabbed-clientnumber-0.6.diff
new file mode 100644
index 0000000..430245c
--- /dev/null
+++ b/tabbed-clientnumber-0.6.diff
@@ -0,0 +1,23 @@
+diff --git a/tabbed.c b/tabbed.c
+index d30206b..70642cb 100644
+--- a/tabbed.c
++++ b/tabbed.c
+@@ -308,6 +308,7 @@ drawbar(void) {
+ 	unsigned long *col;
+ 	int c, fc, width, n = 0;
+ 	char *name = NULL;
++	char tabtitle[256];
+ 
+ 	if(nclients == 0) {
+ 		dc.x = 0;
+@@ -353,7 +354,9 @@ drawbar(void) {
+ 		} else {
+ 			col = dc.norm;
+ 		}
+-		drawtext(clients[c]->name, col);
++		snprintf(tabtitle, sizeof(tabtitle), "%d: %s",
++		         c + 1, clients[c]->name);
++		drawtext(tabtitle, col);
+ 		dc.x += dc.w;
+ 		clients[c]->tabx = dc.x;
+ 	}
diff --git a/tabbed-xresources-20210317-dabf6a2.diff b/tabbed-xresources-20210317-dabf6a2.diff
new file mode 100644
index 0000000..e7f72fa
--- /dev/null
+++ b/tabbed-xresources-20210317-dabf6a2.diff
@@ -0,0 +1,15 @@
+diff --git a/tabbed.c b/tabbed.c
+index eafe28a..c5bffc7 100644
+--- a/tabbed.c
++++ b/tabbed.c
+@@ -1354,6 +1422,7 @@ main(int argc, char *argv[])
+ 	if (!(dpy = XOpenDisplay(NULL)))
+ 		die("%s: cannot open display\n", argv0);
+ 
++	config_init();
+ 	setup();
+ 	printf("0x%lx\n", win);
+ 	fflush(NULL);
+-- 
+2.30.2
+
diff --git a/tabbed.1 b/tabbed.1
new file mode 100644
index 0000000..0ae29ce
--- /dev/null
+++ b/tabbed.1
@@ -0,0 +1,144 @@
+.TH TABBED 1 tabbed\-VERSION
+.SH NAME
+tabbed \- generic tabbed interface
+.SH SYNOPSIS
+.B tabbed
+.RB [ \-c ]
+.RB [ \-d ]
+.RB [ \-h ]
+.RB [ \-s ]
+.RB [ \-v ]
+.RB [ \-g
+.IR geometry ]
+.RB [ \-n
+.IR name ]
+.RB [ \-p
+.IR [ s +/- ] pos ]
+.RB [ \-r
+.IR narg ]
+.IR [ command ... ]
+.SH DESCRIPTION
+.B tabbed
+is a simple tabbed container for applications which support XEmbed. Tabbed
+will then run the provided command with the xid of tabbed as appended
+argument. (See EXAMPLES.) The automatic spawning of the command can be
+disabled by providing the -s parameter. If no command is provided
+tabbed will just print its xid and run no command.
+.SH OPTIONS
+.TP
+.B \-c
+close tabbed when the last tab is closed. Mutually exclusive with -f.
+.TP
+.B \-d
+detaches tabbed from the terminal and prints its XID to stdout.
+.TP
+.B \-f
+fill up tabbed again by spawning the provided command, when the last tab is
+closed. Mutually exclusive with -c.
+.TP
+.B \-h
+will print the usage of tabbed.
+.TP
+.BI \-g " geometry"
+defines the X11 geometry string, which will fixate the height and width of
+tabbed.
+Them form is [=][<width>{xX}<height>][{+-}<xoffset>{+-}<yoffset>]. See
+.BR XParseGeometry (3)
+for further details.
+.TP
+.BI \-n " name"
+will set the WM_CLASS attribute to
+.I name.
+.TP
+.BI \-p " [ s +/-] pos"
+will set the absolute or relative position of where to start a new tab. When
+.I pos
+is is given without 's' in front it is an absolute position. Then negative
+numbers will be the position from the last tab, where -1 is the last tab.
+If 's' is given, then
+.I pos
+is a relative position to the current selected tab. If this reaches the limits
+of the tabs; those limits then apply.
+.TP
+.BI \-r " narg"
+will replace the
+.I narg
+th argument in
+.I command
+with the window id, rather than appending it to the end.
+.TP
+.B \-s
+will disable automatic spawning of the command.
+.TP
+.BI \-t " color"
+defines the selected background color.
+.IR #RGB ,
+.IR #RRGGBB ,
+and X color names are supported.
+.TP
+.BI \-T " color"
+defines the selected foreground color.
+.TP
+.BI \-u " color"
+defines the normal background color.
+.TP
+.BI \-U " color"
+defines the normal foreground color.
+.TP
+.B \-v
+prints version information to stderr, then exits.
+.SH USAGE
+.TP
+.B Ctrl\-Shift\-Return
+open new tab
+.TP
+.B Ctrl\-Shift\-h
+previous tab
+.TP
+.B Ctrl\-Shift\-l
+next tab
+.TP
+.B Ctrl\-Shift\-j
+move selected tab one to the left
+.TP
+.B Ctrl\-Shift\-k
+move selected tab one to the right
+.TP
+.B Ctrl\-Tab
+toggle between the selected and last selected tab
+.TP
+.B Ctrl\-t
+open dmenu to either create a new tab appending the entered string or select
+an already existing tab.
+.TP
+.B Ctrl\-q
+close tab
+.TP
+.B Ctrl\-[0..9]
+jumps to nth tab
+.TP
+.B F11
+Toggle fullscreen mode.
+.SH EXAMPLES
+$ tabbed surf -e
+.TP
+$ tabbed urxvt -embed
+.TP
+$ tabbed xterm -into
+.TP
+$ $(tabbed -d >/tmp/tabbed.xid); urxvt -embed $(</tmp/tabbed.xid);
+.TP
+$ tabbed -r 2 st -w '' -e tmux
+.SH CUSTOMIZATION
+.B tabbed
+can be customized by creating a custom config.h and (re)compiling the source
+code. This keeps it fast, secure and simple.
+.SH AUTHORS
+See the LICENSE file for the authors.
+.SH LICENSE
+See the LICENSE file for the terms of redistribution.
+.SH SEE ALSO
+.BR st (1)
+.SH BUGS
+Please report them.
+
diff --git a/tabbed.c b/tabbed.c
new file mode 100644
index 0000000..097c9ca
--- /dev/null
+++ b/tabbed.c
@@ -0,0 +1,1261 @@
+/*
+ * See LICENSE file for copyright and license details.
+ */
+
+#include <X11/XKBlib.h>
+#include <X11/Xatom.h>
+#include <X11/Xft/Xft.h>
+#include <X11/Xlib.h>
+#include <X11/Xproto.h>
+#include <X11/Xresource.h>
+#include <X11/Xutil.h>
+#include <locale.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "arg.h"
+
+/* XEMBED messages */
+#define XEMBED_EMBEDDED_NOTIFY 0
+#define XEMBED_WINDOW_ACTIVATE 1
+#define XEMBED_WINDOW_DEACTIVATE 2
+#define XEMBED_REQUEST_FOCUS 3
+#define XEMBED_FOCUS_IN 4
+#define XEMBED_FOCUS_OUT 5
+#define XEMBED_FOCUS_NEXT 6
+#define XEMBED_FOCUS_PREV 7
+/* 8-9 were used for XEMBED_GRAB_KEY/XEMBED_UNGRAB_KEY */
+#define XEMBED_MODALITY_ON 10
+#define XEMBED_MODALITY_OFF 11
+#define XEMBED_REGISTER_ACCELERATOR 12
+#define XEMBED_UNREGISTER_ACCELERATOR 13
+#define XEMBED_ACTIVATE_ACCELERATOR 14
+
+/* Details for  XEMBED_FOCUS_IN: */
+#define XEMBED_FOCUS_CURRENT 0
+#define XEMBED_FOCUS_FIRST 1
+#define XEMBED_FOCUS_LAST 2
+
+/* Macros */
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#define LENGTH(x) (sizeof((x)) / sizeof(*(x)))
+#define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
+#define TEXTW(x) (textnw(x, strlen(x)) + dc.font.height)
+
+enum { ColFG, ColBG, ColLast }; /* color */
+enum {
+  WMProtocols,
+  WMDelete,
+  WMName,
+  WMState,
+  WMFullscreen,
+  XEmbed,
+  WMSelectTab,
+  WMLast
+}; /* default atoms */
+
+typedef union {
+  int i;
+  const void *v;
+} Arg;
+
+typedef struct {
+  unsigned int mod;
+  KeySym keysym;
+  void (*func)(const Arg *);
+  const Arg arg;
+} Key;
+
+typedef struct {
+  int x, y, w, h;
+  XftColor norm[ColLast];
+  XftColor sel[ColLast];
+  Drawable drawable;
+  GC gc;
+  struct {
+    int ascent;
+    int descent;
+    int height;
+    XftFont *xfont;
+  } font;
+} DC; /* draw context */
+
+typedef struct Client {
+  char name[256];
+  Window win;
+  int tabx;
+  Bool mapped;
+  Bool closed;
+} Client;
+
+/* Xresources preferences */
+enum resource_type { STRING = 0, INTEGER = 1, FLOAT = 2 };
+
+typedef struct {
+  char *name;
+  enum resource_type type;
+  void *dst;
+} ResourcePref;
+
+/* function declarations */
+static void buttonpress(const XEvent *e);
+static void cleanup(void);
+static void clientmessage(const XEvent *e);
+static void config_init(void);
+static void configurenotify(const XEvent *e);
+static void configurerequest(const XEvent *e);
+static void createnotify(const XEvent *e);
+static void destroynotify(const XEvent *e);
+static void die(const char *errstr, ...);
+static void drawbar(void);
+static void drawtext(const char *text, XftColor col[ColLast]);
+static void *emallocz(size_t size);
+static void *erealloc(void *o, size_t size);
+static void expose(const XEvent *e);
+static void focus(int c);
+static void focusin(const XEvent *e);
+static void focusonce(const Arg *arg);
+static void fullscreen(const Arg *arg);
+static char *getatom(int a);
+static int getclient(Window w);
+static XftColor getcolor(const char *colstr);
+static int getfirsttab(void);
+static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
+static void initfont(const char *fontstr);
+static Bool isprotodel(int c);
+static void keypress(const XEvent *e);
+static void killclient(const Arg *arg);
+static void manage(Window win);
+static void maprequest(const XEvent *e);
+static void move(const Arg *arg);
+static void movetab(const Arg *arg);
+static void propertynotify(const XEvent *e);
+static void resize(int c, int w, int h);
+static int resource_load(XrmDatabase db, char *name, enum resource_type rtype,
+                         void *dst);
+static void rotate(const Arg *arg);
+static void run(void);
+static void sendxembed(int c, long msg, long detail, long d1, long d2);
+static void setup(void);
+static void setcmd(int argc, char *argv[], int);
+static void sigchld(int unused);
+static void spawn(const Arg *arg);
+static int textnw(const char *text, unsigned int len);
+static void unmanage(int c);
+static void updatenumlockmask(void);
+static void updatetitle(int c);
+static int xerror(Display *dpy, XErrorEvent *ee);
+static void xsettitle(Window w, const char *str);
+
+/* variables */
+static int screen;
+static void (*handler[LASTEvent])(const XEvent *) = {
+    [ButtonPress] = buttonpress,
+    [ClientMessage] = clientmessage,
+    [ConfigureNotify] = configurenotify,
+    [ConfigureRequest] = configurerequest,
+    [CreateNotify] = createnotify,
+    [DestroyNotify] = destroynotify,
+    [Expose] = expose,
+    [FocusIn] = focusin,
+    [KeyPress] = keypress,
+    [MapRequest] = maprequest,
+    [PropertyNotify] = propertynotify,
+};
+static int bh, wx, wy, ww, wh;
+static unsigned int numlockmask = 0;
+static Bool running = True, nextfocus, doinitspawn = True, fillagain = False,
+            closelastclient = False;
+static Display *dpy;
+static DC dc;
+static Atom wmatom[WMLast];
+static Window root, win;
+static Client **clients = NULL;
+static int nclients = 0, sel = -1, lastsel = -1;
+static int (*xerrorxlib)(Display *, XErrorEvent *);
+static int cmd_append_pos = 0;
+static char winid[64];
+static char **cmd = NULL;
+static char *wmname = "tabbed";
+static const char *geometry = NULL;
+
+char *argv0;
+
+/* configuration, allows nested code to access above variables */
+#include "config.h"
+
+void buttonpress(const XEvent *e) {
+  const XButtonPressedEvent *ev = &e->xbutton;
+  int i;
+  int fc;
+  Arg arg;
+
+  fc = getfirsttab();
+
+  if ((fc > 0 && ev->x < TEXTW(before)) || ev->x < 0)
+    return;
+
+  if (ev->y < 0 || ev->y > bh)
+    return;
+
+  for (i = (fc > 0) ? fc : 0; i < nclients; i++) {
+    if (clients[i]->tabx > ev->x) {
+      switch (ev->button) {
+      case Button1:
+        focus(i);
+        break;
+      case Button2:
+        focus(i);
+        killclient(NULL);
+        break;
+      case Button4:
+      case Button5:
+        arg.i = ev->button == Button4 ? -1 : 1;
+        rotate(&arg);
+        break;
+      }
+      break;
+    }
+  }
+}
+
+void cleanup(void) {
+  int i;
+
+  for (i = 0; i < nclients; i++) {
+    focus(i);
+    killclient(NULL);
+    killclient(NULL);
+    XReparentWindow(dpy, clients[i]->win, root, 0, 0);
+    unmanage(i);
+  }
+  free(clients);
+  clients = NULL;
+
+  XFreePixmap(dpy, dc.drawable);
+  XFreeGC(dpy, dc.gc);
+  XDestroyWindow(dpy, win);
+  XSync(dpy, False);
+  free(cmd);
+}
+
+void clientmessage(const XEvent *e) {
+  const XClientMessageEvent *ev = &e->xclient;
+
+  if (ev->message_type == wmatom[WMProtocols] &&
+      ev->data.l[0] == wmatom[WMDelete]) {
+    running = False;
+  }
+}
+
+void config_init(void) {
+  char *resm;
+  XrmDatabase db;
+  ResourcePref *p;
+
+  XrmInitialize();
+  resm = XResourceManagerString(dpy);
+  if (!resm)
+    return;
+
+  db = XrmGetStringDatabase(resm);
+  for (p = resources; p < resources + LENGTH(resources); p++)
+    resource_load(db, p->name, p->type, p->dst);
+}
+
+void configurenotify(const XEvent *e) {
+  const XConfigureEvent *ev = &e->xconfigure;
+
+  if (ev->window == win && (ev->width != ww || ev->height != wh)) {
+    ww = ev->width;
+    wh = ev->height;
+    XFreePixmap(dpy, dc.drawable);
+    dc.drawable = XCreatePixmap(dpy, root, ww, wh, DefaultDepth(dpy, screen));
+    if (sel > -1)
+      resize(sel, ww, wh - bh);
+    XSync(dpy, False);
+  }
+}
+
+void configurerequest(const XEvent *e) {
+  const XConfigureRequestEvent *ev = &e->xconfigurerequest;
+  XWindowChanges wc;
+  int c;
+
+  if ((c = getclient(ev->window)) > -1) {
+    wc.x = 0;
+    wc.y = bh;
+    wc.width = ww;
+    wc.height = wh - bh;
+    wc.border_width = 0;
+    wc.sibling = ev->above;
+    wc.stack_mode = ev->detail;
+    XConfigureWindow(dpy, clients[c]->win, ev->value_mask, &wc);
+  }
+}
+
+void createnotify(const XEvent *e) {
+  const XCreateWindowEvent *ev = &e->xcreatewindow;
+
+  if (ev->window != win && getclient(ev->window) < 0)
+    manage(ev->window);
+}
+
+void destroynotify(const XEvent *e) {
+  const XDestroyWindowEvent *ev = &e->xdestroywindow;
+  int c;
+
+  if ((c = getclient(ev->window)) > -1)
+    unmanage(c);
+}
+
+void die(const char *errstr, ...) {
+  va_list ap;
+
+  va_start(ap, errstr);
+  vfprintf(stderr, errstr, ap);
+  va_end(ap);
+  exit(EXIT_FAILURE);
+}
+
+void drawbar(void) {
+  XftColor *col;
+  int c, fc, width, n = 0;
+  char *name = NULL;
+  char tabtitle[256];
+
+  if (nclients == 0) {
+    dc.x = 0;
+    dc.w = ww;
+    XFetchName(dpy, win, &name);
+    drawtext(name ? name : "", dc.norm);
+    XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, ww, bh, 0, 0);
+    XSync(dpy, False);
+
+    return;
+  }
+
+  width = ww;
+  clients[nclients - 1]->tabx = -1;
+  fc = getfirsttab();
+  if (fc > -1)
+    n = nclients - fc;
+
+  if ((n * tabwidth) > width) {
+    dc.w = TEXTW(after);
+    dc.x = width - dc.w;
+    drawtext(after, dc.sel);
+    width -= dc.w;
+  }
+  dc.x = 0;
+
+  if (fc > 0) {
+    dc.w = TEXTW(before);
+    drawtext(before, dc.sel);
+    dc.x += dc.w;
+    width -= dc.w;
+  }
+
+  for (c = (fc > 0) ? fc : 0; c < nclients && dc.x < width; c++) {
+    dc.w = tabwidth;
+    if (c == sel) {
+      col = dc.sel;
+      if ((n * tabwidth) > width) {
+        dc.w += width % tabwidth;
+      } else {
+        dc.w = width - (n - 1) * tabwidth;
+      }
+    } else {
+      col = dc.norm;
+    }
+    snprintf(tabtitle, sizeof(tabtitle), "%d: %s", c + 1, clients[c]->name);
+    drawtext(tabtitle, col);
+    dc.x += dc.w;
+    clients[c]->tabx = dc.x;
+  }
+  XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, ww, bh, 0, 0);
+  XSync(dpy, False);
+}
+
+void drawtext(const char *text, XftColor col[ColLast]) {
+  int i, x, y, h, len, olen;
+  char buf[256];
+  XftDraw *d;
+  XRectangle r = {dc.x, dc.y, dc.w, dc.h};
+
+  XSetForeground(dpy, dc.gc, col[ColBG].pixel);
+  XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
+  if (!text)
+    return;
+
+  olen = strlen(text);
+  h = dc.font.ascent + dc.font.descent;
+  y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
+  x = dc.x + (h / 2);
+
+  /* shorten text if necessary */
+  for (len = MIN(olen, sizeof(buf)); len && textnw(text, len) > dc.w - h; len--)
+    ;
+  if (!len)
+    return;
+
+  memcpy(buf, text, len);
+  if (len < olen) {
+    for (i = len; i && i > len - 3; buf[--i] = '.')
+      ;
+  }
+  d = XftDrawCreate(dpy, dc.drawable, DefaultVisual(dpy, screen),
+                    DefaultColormap(dpy, screen));
+
+  XftDrawStringUtf8(d, &col[ColFG], dc.font.xfont, x, y, (XftChar8 *)buf, len);
+  XftDrawDestroy(d);
+}
+
+void *emallocz(size_t size) {
+  void *p;
+
+  if (!(p = calloc(1, size)))
+    die("tabbed: cannot malloc\n");
+  return p;
+}
+
+void *erealloc(void *o, size_t size) {
+  void *p;
+
+  if (!(p = realloc(o, size)))
+    die("tabbed: cannot realloc\n");
+  return p;
+}
+
+void expose(const XEvent *e) {
+  const XExposeEvent *ev = &e->xexpose;
+
+  if (ev->count == 0 && win == ev->window)
+    drawbar();
+}
+
+void focus(int c) {
+  char buf[BUFSIZ] = "tabbed-" VERSION " ::";
+  size_t i, n;
+
+  /* If c, sel and clients are -1, raise tabbed-win itself */
+  if (nclients == 0) {
+    cmd[cmd_append_pos] = NULL;
+    for (i = 0, n = strlen(buf); cmd[i] && n < sizeof(buf); i++)
+      n += snprintf(&buf[n], sizeof(buf) - n, " %s", cmd[i]);
+
+    xsettitle(win, buf);
+    XRaiseWindow(dpy, win);
+
+    return;
+  }
+
+  if (c < 0 || c >= nclients)
+    return;
+
+  resize(c, ww, wh - bh);
+  XRaiseWindow(dpy, clients[c]->win);
+  XSetInputFocus(dpy, clients[c]->win, RevertToParent, CurrentTime);
+  sendxembed(c, XEMBED_FOCUS_IN, XEMBED_FOCUS_CURRENT, 0, 0);
+  sendxembed(c, XEMBED_WINDOW_ACTIVATE, 0, 0, 0);
+  xsettitle(win, clients[c]->name);
+
+  /* If sel is already c, change nothing. */
+  if (sel != c) {
+    lastsel = sel;
+    sel = c;
+  }
+
+  drawbar();
+  XSync(dpy, False);
+}
+
+void focusin(const XEvent *e) {
+  const XFocusChangeEvent *ev = &e->xfocus;
+  int dummy;
+  Window focused;
+
+  if (ev->mode != NotifyUngrab) {
+    XGetInputFocus(dpy, &focused, &dummy);
+    if (focused == win)
+      focus(sel);
+  }
+}
+
+void focusonce(const Arg *arg) { nextfocus = True; }
+
+void fullscreen(const Arg *arg) {
+  XEvent e;
+
+  e.type = ClientMessage;
+  e.xclient.window = win;
+  e.xclient.message_type = wmatom[WMState];
+  e.xclient.format = 32;
+  e.xclient.data.l[0] = 2;
+  e.xclient.data.l[1] = wmatom[WMFullscreen];
+  e.xclient.data.l[2] = 0;
+  XSendEvent(dpy, root, False, SubstructureNotifyMask, &e);
+}
+
+char *getatom(int a) {
+  static char buf[BUFSIZ];
+  Atom adummy;
+  int idummy;
+  unsigned long ldummy;
+  unsigned char *p = NULL;
+
+  XGetWindowProperty(dpy, win, wmatom[a], 0L, BUFSIZ, False, XA_STRING, &adummy,
+                     &idummy, &ldummy, &ldummy, &p);
+  if (p) {
+    strncpy(buf, (char *)p, LENGTH(buf) - 1);
+  } else {
+    buf[0] = '\0';
+  }
+  XFree(p);
+
+  return buf;
+}
+
+int getclient(Window w) {
+  int i;
+
+  for (i = 0; i < nclients; i++) {
+    if (clients[i]->win == w)
+      return i;
+  }
+
+  return -1;
+}
+
+XftColor getcolor(const char *colstr) {
+  XftColor color;
+
+  if (!XftColorAllocName(dpy, DefaultVisual(dpy, screen),
+                         DefaultColormap(dpy, screen), colstr, &color))
+    die("tabbed: cannot allocate color '%s'\n", colstr);
+
+  return color;
+}
+
+int getfirsttab(void) {
+  int c, n, fc;
+
+  if (sel < 0)
+    return -1;
+
+  c = sel;
+  fc = 0;
+  n = nclients;
+  if ((n * tabwidth) > ww) {
+    for (; (c * tabwidth) > (ww / 2) && (n * tabwidth) > ww; c--, n--, fc++)
+      ;
+  }
+
+  return fc;
+}
+
+Bool gettextprop(Window w, Atom atom, char *text, unsigned int size) {
+  char **list = NULL;
+  int n;
+  XTextProperty name;
+
+  if (!text || size == 0)
+    return False;
+
+  text[0] = '\0';
+  XGetTextProperty(dpy, w, &name, atom);
+  if (!name.nitems)
+    return False;
+
+  if (name.encoding == XA_STRING) {
+    strncpy(text, (char *)name.value, size - 1);
+  } else {
+    if (XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 &&
+        *list) {
+      strncpy(text, *list, size - 1);
+      XFreeStringList(list);
+    }
+  }
+  text[size - 1] = '\0';
+  XFree(name.value);
+
+  return True;
+}
+
+void initfont(const char *fontstr) {
+  if (!(dc.font.xfont = XftFontOpenName(dpy, screen, fontstr)) &&
+      !(dc.font.xfont = XftFontOpenName(dpy, screen, "fixed")))
+    die("error, cannot load font: '%s'\n", fontstr);
+
+  dc.font.ascent = dc.font.xfont->ascent;
+  dc.font.descent = dc.font.xfont->descent;
+  dc.font.height = dc.font.ascent + dc.font.descent;
+}
+
+Bool isprotodel(int c) {
+  int i, n;
+  Atom *protocols;
+  Bool ret = False;
+
+  if (XGetWMProtocols(dpy, clients[c]->win, &protocols, &n)) {
+    for (i = 0; !ret && i < n; i++) {
+      if (protocols[i] == wmatom[WMDelete])
+        ret = True;
+    }
+    XFree(protocols);
+  }
+
+  return ret;
+}
+
+void keypress(const XEvent *e) {
+  const XKeyEvent *ev = &e->xkey;
+  unsigned int i;
+  KeySym keysym;
+
+  keysym = XkbKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0, 0);
+  for (i = 0; i < LENGTH(keys); i++) {
+    if (keysym == keys[i].keysym &&
+        CLEANMASK(keys[i].mod) == CLEANMASK(ev->state) && keys[i].func) {
+      keys[i].func(&(keys[i].arg));
+    }
+  }
+}
+
+void killclient(const Arg *arg) {
+  XEvent ev;
+
+  if (sel < 0)
+    return;
+
+  if (isprotodel(sel) && !clients[sel]->closed) {
+    ev.type = ClientMessage;
+    ev.xclient.window = clients[sel]->win;
+    ev.xclient.message_type = wmatom[WMProtocols];
+    ev.xclient.format = 32;
+    ev.xclient.data.l[0] = wmatom[WMDelete];
+    ev.xclient.data.l[1] = CurrentTime;
+    XSendEvent(dpy, clients[sel]->win, False, NoEventMask, &ev);
+    clients[sel]->closed = True;
+  } else {
+    XKillClient(dpy, clients[sel]->win);
+  }
+}
+
+void manage(Window w) {
+  updatenumlockmask();
+  {
+    int i, j, nextpos;
+    unsigned int modifiers[] = {0, LockMask, numlockmask,
+                                numlockmask | LockMask};
+    KeyCode code;
+    Client *c;
+    XEvent e;
+
+    XWithdrawWindow(dpy, w, 0);
+    XReparentWindow(dpy, w, win, 0, bh);
+    XSelectInput(dpy, w,
+                 PropertyChangeMask | StructureNotifyMask | EnterWindowMask);
+    XSync(dpy, False);
+
+    for (i = 0; i < LENGTH(keys); i++) {
+      if ((code = XKeysymToKeycode(dpy, keys[i].keysym))) {
+        for (j = 0; j < LENGTH(modifiers); j++) {
+          XGrabKey(dpy, code, keys[i].mod | modifiers[j], w, True,
+                   GrabModeAsync, GrabModeAsync);
+        }
+      }
+    }
+
+    c = emallocz(sizeof(*c));
+    c->win = w;
+
+    nclients++;
+    clients = erealloc(clients, sizeof(Client *) * nclients);
+
+    if (npisrelative) {
+      nextpos = sel + newposition;
+    } else {
+      if (newposition < 0) {
+        nextpos = nclients - newposition;
+      } else {
+        nextpos = newposition;
+      }
+    }
+    if (nextpos >= nclients)
+      nextpos = nclients - 1;
+    if (nextpos < 0)
+      nextpos = 0;
+
+    if (nclients > 1 && nextpos < nclients - 1) {
+      memmove(&clients[nextpos + 1], &clients[nextpos],
+              sizeof(Client *) * (nclients - nextpos - 1));
+    }
+    clients[nextpos] = c;
+    updatetitle(nextpos);
+
+    XLowerWindow(dpy, w);
+    XMapWindow(dpy, w);
+
+    e.xclient.window = w;
+    e.xclient.type = ClientMessage;
+    e.xclient.message_type = wmatom[XEmbed];
+    e.xclient.format = 32;
+    e.xclient.data.l[0] = CurrentTime;
+    e.xclient.data.l[1] = XEMBED_EMBEDDED_NOTIFY;
+    e.xclient.data.l[2] = 0;
+    e.xclient.data.l[3] = win;
+    e.xclient.data.l[4] = 0;
+    XSendEvent(dpy, root, False, NoEventMask, &e);
+
+    XSync(dpy, False);
+
+    /* Adjust sel before focus does set it to lastsel. */
+    if (sel >= nextpos)
+      sel++;
+    focus((nextfocus) ? nextpos : ((sel < 0) ? 0 : sel));
+    nextfocus = foreground;
+  }
+}
+
+void maprequest(const XEvent *e) {
+  const XMapRequestEvent *ev = &e->xmaprequest;
+
+  if (getclient(ev->window) < 0)
+    manage(ev->window);
+}
+
+void move(const Arg *arg) {
+  if (arg->i >= 0 && arg->i < nclients)
+    focus(arg->i);
+}
+
+void movetab(const Arg *arg) {
+  int c;
+  Client *new;
+
+  if (sel < 0 || (arg->i == 0))
+    return;
+
+  c = sel + arg->i;
+  while (c >= nclients)
+    c -= nclients;
+  while (c < 0)
+    c += nclients;
+
+  new = clients[c];
+  clients[c] = clients[sel];
+  clients[sel] = new;
+
+  sel = c;
+
+  drawbar();
+}
+
+void propertynotify(const XEvent *e) {
+  const XPropertyEvent *ev = &e->xproperty;
+  int c;
+  char *selection = NULL;
+  Arg arg;
+
+  if (ev->state == PropertyNewValue && ev->atom == wmatom[WMSelectTab]) {
+    selection = getatom(WMSelectTab);
+    if (!strncmp(selection, "0x", 2)) {
+      arg.i = getclient(strtoul(selection, NULL, 0));
+      move(&arg);
+    } else {
+      cmd[cmd_append_pos] = selection;
+      arg.v = cmd;
+      spawn(&arg);
+    }
+  } else if (ev->state != PropertyDelete && ev->atom == XA_WM_NAME &&
+             (c = getclient(ev->window)) > -1) {
+    updatetitle(c);
+  }
+}
+
+void resize(int c, int w, int h) {
+  XConfigureEvent ce;
+  XWindowChanges wc;
+
+  ce.x = 0;
+  ce.y = bh;
+  ce.width = wc.width = w;
+  ce.height = wc.height = h;
+  ce.type = ConfigureNotify;
+  ce.display = dpy;
+  ce.event = clients[c]->win;
+  ce.window = clients[c]->win;
+  ce.above = None;
+  ce.override_redirect = False;
+  ce.border_width = 0;
+
+  XConfigureWindow(dpy, clients[c]->win, CWWidth | CWHeight, &wc);
+  XSendEvent(dpy, clients[c]->win, False, StructureNotifyMask, (XEvent *)&ce);
+}
+
+int resource_load(XrmDatabase db, char *name, enum resource_type rtype,
+                  void *dst) {
+  char **sdst = dst;
+  int *idst = dst;
+  float *fdst = dst;
+
+  char fullname[256];
+  char fullclass[256];
+  char *type;
+  XrmValue ret;
+
+  snprintf(fullname, sizeof(fullname), "%s.%s", "tabbed", name);
+  snprintf(fullclass, sizeof(fullclass), "%s.%s", "tabbed", name);
+  fullname[sizeof(fullname) - 1] = fullclass[sizeof(fullclass) - 1] = '\0';
+
+  XrmGetResource(db, fullname, fullclass, &type, &ret);
+  if (ret.addr == NULL || strncmp("String", type, 64))
+    return 1;
+
+  switch (rtype) {
+  case STRING:
+    *sdst = ret.addr;
+    break;
+  case INTEGER:
+    *idst = strtoul(ret.addr, NULL, 10);
+    break;
+  case FLOAT:
+    *fdst = strtof(ret.addr, NULL);
+    break;
+  }
+  return 0;
+}
+
+void rotate(const Arg *arg) {
+  int nsel = -1;
+
+  if (sel < 0)
+    return;
+
+  if (arg->i == 0) {
+    if (lastsel > -1)
+      focus(lastsel);
+  } else if (sel > -1) {
+    /* Rotating in an arg->i step around the clients. */
+    nsel = sel + arg->i;
+    while (nsel >= nclients)
+      nsel -= nclients;
+    while (nsel < 0)
+      nsel += nclients;
+    focus(nsel);
+  }
+}
+
+void run(void) {
+  XEvent ev;
+
+  /* main event loop */
+  XSync(dpy, False);
+  drawbar();
+  if (doinitspawn == True)
+    spawn(NULL);
+
+  while (running) {
+    XNextEvent(dpy, &ev);
+    if (handler[ev.type])
+      (handler[ev.type])(&ev); /* call handler */
+  }
+}
+
+void sendxembed(int c, long msg, long detail, long d1, long d2) {
+  XEvent e = {0};
+
+  e.xclient.window = clients[c]->win;
+  e.xclient.type = ClientMessage;
+  e.xclient.message_type = wmatom[XEmbed];
+  e.xclient.format = 32;
+  e.xclient.data.l[0] = CurrentTime;
+  e.xclient.data.l[1] = msg;
+  e.xclient.data.l[2] = detail;
+  e.xclient.data.l[3] = d1;
+  e.xclient.data.l[4] = d2;
+  XSendEvent(dpy, clients[c]->win, False, NoEventMask, &e);
+}
+
+void setcmd(int argc, char *argv[], int replace) {
+  int i;
+
+  cmd = emallocz((argc + 3) * sizeof(*cmd));
+  if (argc == 0)
+    return;
+  for (i = 0; i < argc; i++)
+    cmd[i] = argv[i];
+  cmd[(replace > 0) ? replace : argc] = winid;
+  cmd_append_pos = argc + !replace;
+  cmd[cmd_append_pos] = cmd[cmd_append_pos + 1] = NULL;
+}
+
+void setup(void) {
+  int bitm, tx, ty, tw, th, dh, dw, isfixed;
+  XClassHint class_hint;
+  XSizeHints *size_hint;
+
+  /* clean up any zombies immediately */
+  sigchld(0);
+
+  /* init screen */
+  screen = DefaultScreen(dpy);
+  root = RootWindow(dpy, screen);
+  initfont(font);
+  bh = dc.h = dc.font.height + 2;
+
+  /* init atoms */
+  wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
+  wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
+  wmatom[XEmbed] = XInternAtom(dpy, "_XEMBED", False);
+  wmatom[WMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
+  wmatom[WMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
+  wmatom[WMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
+  wmatom[WMSelectTab] = XInternAtom(dpy, "_TABBED_SELECT_TAB", False);
+
+  /* init appearance */
+  wx = 0;
+  wy = 0;
+  ww = 800;
+  wh = 600;
+  isfixed = 0;
+
+  if (geometry) {
+    tx = ty = tw = th = 0;
+    bitm = XParseGeometry(geometry, &tx, &ty, (unsigned *)&tw, (unsigned *)&th);
+    if (bitm & XValue)
+      wx = tx;
+    if (bitm & YValue)
+      wy = ty;
+    if (bitm & WidthValue)
+      ww = tw;
+    if (bitm & HeightValue)
+      wh = th;
+    if (bitm & XNegative && wx == 0)
+      wx = -1;
+    if (bitm & YNegative && wy == 0)
+      wy = -1;
+    if (bitm & (HeightValue | WidthValue))
+      isfixed = 1;
+
+    dw = DisplayWidth(dpy, screen);
+    dh = DisplayHeight(dpy, screen);
+    if (wx < 0)
+      wx = dw + wx - ww - 1;
+    if (wy < 0)
+      wy = dh + wy - wh - 1;
+  }
+
+  dc.norm[ColBG] = getcolor(normbgcolor);
+  dc.norm[ColFG] = getcolor(normfgcolor);
+  dc.sel[ColBG] = getcolor(selbgcolor);
+  dc.sel[ColFG] = getcolor(selfgcolor);
+  dc.drawable = XCreatePixmap(dpy, root, ww, wh, DefaultDepth(dpy, screen));
+  dc.gc = XCreateGC(dpy, root, 0, 0);
+
+  win = XCreateSimpleWindow(dpy, root, wx, wy, ww, wh, 0, dc.norm[ColFG].pixel,
+                            dc.norm[ColBG].pixel);
+  XMapRaised(dpy, win);
+  XSelectInput(dpy, win,
+               SubstructureNotifyMask | FocusChangeMask | ButtonPressMask |
+                   ExposureMask | KeyPressMask | PropertyChangeMask |
+                   StructureNotifyMask | SubstructureRedirectMask);
+  xerrorxlib = XSetErrorHandler(xerror);
+
+  class_hint.res_name = wmname;
+  class_hint.res_class = "tabbed";
+  XSetClassHint(dpy, win, &class_hint);
+
+  size_hint = XAllocSizeHints();
+  if (!isfixed) {
+    size_hint->flags = PSize;
+    size_hint->height = wh;
+    size_hint->width = ww;
+  } else {
+    size_hint->flags = PMaxSize | PMinSize;
+    size_hint->min_width = size_hint->max_width = ww;
+    size_hint->min_height = size_hint->max_height = wh;
+  }
+  XSetWMProperties(dpy, win, NULL, NULL, NULL, 0, size_hint, NULL, NULL);
+  XFree(size_hint);
+
+  XSetWMProtocols(dpy, win, &wmatom[WMDelete], 1);
+
+  snprintf(winid, sizeof(winid), "%lu", win);
+  setenv("XEMBED", winid, 1);
+
+  nextfocus = foreground;
+  focus(-1);
+}
+
+void sigchld(int unused) {
+  if (signal(SIGCHLD, sigchld) == SIG_ERR)
+    die("tabbed: cannot install SIGCHLD handler");
+
+  while (0 < waitpid(-1, NULL, WNOHANG))
+    ;
+}
+
+void spawn(const Arg *arg) {
+  if (fork() == 0) {
+    if (dpy)
+      close(ConnectionNumber(dpy));
+
+    setsid();
+    if (arg && arg->v) {
+      execvp(((char **)arg->v)[0], (char **)arg->v);
+      fprintf(stderr, "tabbed: execvp %s", ((char **)arg->v)[0]);
+    } else {
+      cmd[cmd_append_pos] = NULL;
+      execvp(cmd[0], cmd);
+      fprintf(stderr, "tabbed: execvp %s", cmd[0]);
+    }
+    perror(" failed");
+    exit(0);
+  }
+}
+
+int textnw(const char *text, unsigned int len) {
+  XGlyphInfo ext;
+  XftTextExtentsUtf8(dpy, dc.font.xfont, (XftChar8 *)text, len, &ext);
+  return ext.xOff;
+}
+
+void unmanage(int c) {
+  if (c < 0 || c >= nclients) {
+    drawbar();
+    XSync(dpy, False);
+    return;
+  }
+
+  if (!nclients) {
+    return;
+  } else if (c == 0) {
+    /* First client. */
+    nclients--;
+    free(clients[0]);
+    memmove(&clients[0], &clients[1], sizeof(Client *) * nclients);
+  } else if (c == nclients - 1) {
+    /* Last client. */
+    nclients--;
+    free(clients[c]);
+    clients = erealloc(clients, sizeof(Client *) * nclients);
+  } else {
+    /* Somewhere inbetween. */
+    free(clients[c]);
+    memmove(&clients[c], &clients[c + 1],
+            sizeof(Client *) * (nclients - (c + 1)));
+    nclients--;
+  }
+
+  if (nclients <= 0) {
+    sel = -1;
+    lastsel = -1;
+
+    if (closelastclient) {
+      running = False;
+    } else if (fillagain && running) {
+      spawn(NULL);
+    }
+  } else {
+    if (c == lastsel) {
+      lastsel = -1;
+    } else if (lastsel > c) {
+      lastsel--;
+    }
+    lastsel = MIN(lastsel, nclients - 1);
+
+    if (c == sel) {
+      /* Note that focus() will never set lastsel == sel,
+       * so if here lastsel == sel, it was decreased by above if() clause
+       * and was actually (sel + 1) before.
+       */
+      if (lastsel > 0) {
+        focus(lastsel);
+      } else {
+        focus(0);
+        lastsel = 1;
+      }
+    } else {
+      if (sel > c)
+        sel -= 1;
+      if (sel >= nclients)
+        sel = nclients - 1;
+
+      focus(sel);
+    }
+  }
+
+  drawbar();
+  XSync(dpy, False);
+}
+
+void updatenumlockmask(void) {
+  unsigned int i, j;
+  XModifierKeymap *modmap;
+
+  numlockmask = 0;
+  modmap = XGetModifierMapping(dpy);
+  for (i = 0; i < 8; i++) {
+    for (j = 0; j < modmap->max_keypermod; j++) {
+      if (modmap->modifiermap[i * modmap->max_keypermod + j] ==
+          XKeysymToKeycode(dpy, XK_Num_Lock)) {
+        numlockmask = (1 << i);
+      }
+    }
+  }
+  XFreeModifiermap(modmap);
+}
+
+void updatetitle(int c) {
+  if (!gettextprop(clients[c]->win, wmatom[WMName], clients[c]->name,
+                   sizeof(clients[c]->name))) {
+    gettextprop(clients[c]->win, XA_WM_NAME, clients[c]->name,
+                sizeof(clients[c]->name));
+  }
+  if (sel == c)
+    xsettitle(win, clients[c]->name);
+  drawbar();
+}
+
+/* There's no way to check accesses to destroyed windows, thus those cases are
+ * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
+ * default error handler, which may call exit.  */
+int xerror(Display *dpy, XErrorEvent *ee) {
+  if (ee->error_code == BadWindow ||
+      (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch) ||
+      (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable) ||
+      (ee->request_code == X_PolyFillRectangle &&
+       ee->error_code == BadDrawable) ||
+      (ee->request_code == X_PolySegment && ee->error_code == BadDrawable) ||
+      (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch) ||
+      (ee->request_code == X_GrabButton && ee->error_code == BadAccess) ||
+      (ee->request_code == X_GrabKey && ee->error_code == BadAccess) ||
+      (ee->request_code == X_CopyArea && ee->error_code == BadDrawable)) {
+    return 0;
+  }
+
+  fprintf(stderr, "tabbed: fatal error: request code=%d, error code=%d\n",
+          ee->request_code, ee->error_code);
+  return xerrorxlib(dpy, ee); /* may call exit */
+}
+
+void xsettitle(Window w, const char *str) {
+  XTextProperty xtp;
+
+  if (XmbTextListToTextProperty(dpy, (char **)&str, 1, XCompoundTextStyle,
+                                &xtp) == Success) {
+    XSetTextProperty(dpy, w, &xtp, wmatom[WMName]);
+    XSetTextProperty(dpy, w, &xtp, XA_WM_NAME);
+    XFree(xtp.value);
+  }
+}
+
+char *argv0;
+
+void usage(void) {
+  die("usage: %s [-dfhsv] [-g geometry] [-n name] [-p [s+/-]pos] [-r narg] "
+      "[-u color] [-U color] [-t color] [-T color] command...\n",
+      argv0);
+}
+
+int main(int argc, char *argv[]) {
+  Bool detach = False;
+  int replace = 0;
+  char *pstr;
+
+  ARGBEGIN {
+  case 'c':
+    closelastclient = True;
+    fillagain = False;
+    break;
+  case 'd':
+    detach = True;
+    break;
+  case 'f':
+    fillagain = True;
+    break;
+  case 'g':
+    geometry = EARGF(usage());
+    break;
+  case 'n':
+    wmname = EARGF(usage());
+    break;
+  case 'p':
+    pstr = EARGF(usage());
+    if (pstr[0] == 's') {
+      npisrelative = True;
+      newposition = atoi(&pstr[1]);
+    } else {
+      newposition = atoi(pstr);
+    }
+    break;
+  case 'r':
+    replace = atoi(EARGF(usage()));
+    break;
+  case 's':
+    doinitspawn = False;
+    break;
+  case 'v':
+    die("tabbed-" VERSION ", © 2009-2012"
+        " tabbed engineers, see LICENSE"
+        " for details.\n");
+    break;
+  case 't':
+    selbgcolor = EARGF(usage());
+    break;
+  case 'T':
+    selfgcolor = EARGF(usage());
+    break;
+  case 'u':
+    normbgcolor = EARGF(usage());
+    break;
+  case 'U':
+    normfgcolor = EARGF(usage());
+    break;
+  default:
+  case 'h':
+    usage();
+  }
+  ARGEND;
+
+  if (argc < 1) {
+    doinitspawn = False;
+    fillagain = False;
+  }
+
+  setcmd(argc, argv, replace);
+
+  if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
+    fprintf(stderr, "tabbed: no locale support\n");
+  if (!(dpy = XOpenDisplay(NULL)))
+    die("tabbed: cannot open display\n");
+
+  config_init();
+  setup();
+  printf("0x%lx\n", win);
+  fflush(NULL);
+
+  if (detach) {
+    if (fork() == 0) {
+      fclose(stdout);
+    } else {
+      if (dpy)
+        close(ConnectionNumber(dpy));
+      return EXIT_SUCCESS;
+    }
+  }
+
+  run();
+  cleanup();
+  XCloseDisplay(dpy);
+
+  return EXIT_SUCCESS;
+}