exporting patch:
# HG changeset patch
# User Gregor Best <gbe@ring0.de>
# Date 1307706900 -7200
# Node ID fdeaafa15c5bcc33b1676241df4083dc1005bf02
# Parent  1f090280fc824f4c5869f16db9e2d0d641d06d15
Set envvar TABBED_WIN to the window id

This allows stuff like
    st -t "I'm a shell" -w $TABBED_WIN
from inside tabbed.

diff -r 1f090280fc82 -r fdeaafa15c5b config.mk
--- a/config.mk	Fri May 06 21:40:53 2011 +0100
+++ b/config.mk	Fri Jun 10 13:55:00 2011 +0200
@@ -9,7 +9,7 @@
 
 # includes and libs
 INCS = -I. -I/usr/include
-LIBS = -L/usr/lib -lc -lX11
+LIBS = -L/usr/lib -lc -lm -lX11
 
 # flags
 CPPFLAGS = -DVERSION=\"${VERSION}\"
diff -r 1f090280fc82 -r fdeaafa15c5b tabbed.c
--- a/tabbed.c	Fri May 06 21:40:53 2011 +0100
+++ b/tabbed.c	Fri Jun 10 13:55:00 2011 +0200
@@ -2,6 +2,7 @@
  *
  * To understand tabbed, start reading main().
  */
+#define _BSD_SOURCE // for the definition of setenv()
 #include <sys/wait.h>
 #include <locale.h>
 #include <stdarg.h>
@@ -10,6 +11,8 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <math.h>
+#include <stdlib.h>
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
 #include <X11/Xproto.h>
@@ -858,7 +861,8 @@
 
 int
 main(int argc, char *argv[]) {
-	int i, detach = 0;
+	int i, detach = 0, len;
+	char *tmp;
 
 	for(i = 1; i < argc && !cmd; i++) {
 		if(!strcmp("-v", argv[i]))
@@ -875,6 +879,11 @@
 	if(!(dpy = XOpenDisplay(NULL)))
 		die("tabbed: cannot open display\n");
 	setup();
+	len = (int)(log10(win) + 2);
+	tmp = malloc(sizeof(char) * len);
+	snprintf(tmp, len, "%lu", win);
+	setenv("TABBED_WIN", tmp, 1);
+	free(tmp);
 	printf("%lu\n", win);
 	fflush(NULL);
 	if(detach) {