diff -r 440dda47ae5b config.def.h
--- a/config.def.h	Fri May 29 09:29:22 2009 +0100
+++ b/config.def.h	Fri Jun 05 13:16:51 2009 +0100
@@ -14,7 +14,7 @@
 static Bool topbar                  = True;     /* False means bottom bar */
 
 /* tagging */
-static const char *tags[] = { "1", "2", "3", "4", "5", "6", "7", "8", "9" };
+static char tags[][MAXTAGLEN] = { "1", "2", "3", "4", "5", "6", "7", "8", "9" };
 static unsigned int tagset[] = {1, 1}; /* after start, first tag is selected */
 
 static Rule rules[] = {
diff -r 440dda47ae5b dwm.c
--- a/dwm.c	Fri May 29 09:29:22 2009 +0100
+++ b/dwm.c	Fri Jun 05 13:16:51 2009 +0100
@@ -54,6 +54,8 @@
 #define TAGMASK                 ((int)((1LL << LENGTH(tags)) - 1))
 #define TEXTW(x)                (textnw(x, strlen(x)) + dc.font.height)
 
+#define MAXTAGLEN		64
+
 /* enums */
 enum { CurNormal, CurResize, CurMove, CurLast };        /* cursor */
 enum { ColBorder, ColFG, ColBG, ColLast };              /* color */
@@ -202,6 +204,7 @@
 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 static void zoom(const Arg *arg);
+static void runcommand(void);
 
 /* variables */
 static char stext[256];
@@ -226,7 +229,7 @@
 	[PropertyNotify] = propertynotify,
 	[UnmapNotify] = unmapnotify
 };
-static Atom wmatom[WMLast], netatom[NetLast];
+static Atom wmatom[WMLast], netatom[NetLast], commandatom;
 static Bool otherwm;
 static Bool running = True;
 static Client *clients = NULL;
@@ -1063,8 +1066,13 @@
 	Window trans;
 	XPropertyEvent *ev = &e->xproperty;
 
-	if((ev->window == root) && (ev->atom == XA_WM_NAME))
-		updatestatus();
+	if(ev->window == root) {
+		if (ev->atom == XA_WM_NAME) {
+			updatestatus();
+		} else if(ev->atom == commandatom) {
+			runcommand();
+		}
+	}
 	else if(ev->state == PropertyDelete)
 		return; /* ignore */
 	else if((c = getclient(ev->window))) {
@@ -1279,6 +1287,7 @@
 	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
 	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
 	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
+	commandatom = XInternAtom(dpy, "DWM_COMMAND", False);
 
 	/* init cursors */
 	wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
@@ -1614,6 +1623,45 @@
 }
 
 void
+runcommand(void) {
+	char cmd[256];
+	if(!gettextprop(root, commandatom, cmd, sizeof(cmd))) {
+		/* Ignore empty commands, also prevents infinite loop */
+		return;
+	}
+	switch(cmd[0]) {
+		case 'N':
+			{
+				unsigned int ts = tagset[seltags];
+				unsigned int i;
+				for(i = 0; ts != 0; i++, ts >>= 1) {
+					if(ts & 1) {
+						if(cmd[1] == '\0') {
+							snprintf(tags[i], MAXTAGLEN, "%u", i);
+						} else {
+							snprintf(tags[i], MAXTAGLEN, "%u(%s)", i, cmd + 1);
+						}
+					}
+				}
+				drawbar();
+			}
+			break;
+		default:
+			fprintf(stderr, "dwm: Unknown command '%c'\n", cmd[0]);
+			break;
+	}
+	{ /* Clear the command */
+		XTextProperty prop = {
+			.value = NULL,
+			.encoding = XA_STRING,
+			.format = 8,
+			.nitems = 0
+		};
+		XSetTextProperty(dpy, root, &prop, commandatom);
+	}
+}
+
+void
 updatewmhints(Client *c) {
 	XWMHints *wmh;