Author: Jan Christoph Ebersbach <jceb@e-jc.de>
URL: http://dwm.suckless.org/patches/focusurgent
focusurgent selects the next window having the urgent flag regardless of the tag
it is on.  The urgent flag can be artificially set with the following xdotool
command on any window: xdotool selectwindow -- set_window --urgency 1

Index: clean/dwm/config.def.h
===================================================================
--- a/config.def.h
+++ b/config.def.h
@@ -59,6 +59,7 @@ static char dmenumon[2] = "0"; /* compon
 static const char *dmenucmd[] = { "dmenu_run", "-m", dmenumon, "-fn", dmenufont, "-nb", col_gray1, "-nf", col_gray3, "-sb", col_cyan, "-sf", col_gray4, NULL };
 static const char *termcmd[]  = { "st", NULL };
 
+#include "focusurgent.c"
 static Key keys[] = {
 	/* modifier                     key        function        argument */
 	{ MODKEY,                       XK_p,      spawn,          {.v = dmenucmd } },
@@ -94,6 +95,7 @@ static Key keys[] = {
 	TAGKEYS(                        XK_8,                      7)
 	TAGKEYS(                        XK_9,                      8)
 	{ MODKEY|ShiftMask,             XK_q,      quit,           {0} },
+	{ MODKEY,                       XK_u,      focusurgent,    {0} },
 };
 
 /* button definitions */
Index: clean/dwm/focusurgent.c
===================================================================
--- /dev/null
+++ b/focusurgent.c
@@ -0,0 +1,14 @@
+static void
+focusurgent(const Arg *arg) {
+	Client *c;
+	int i;
+	for(c=selmon->clients; c && !c->isurgent; c=c->next);
+	if(c) {
+		for(i=0; i < LENGTH(tags) && !((1 << i) & c->tags); i++);
+		if(i < LENGTH(tags)) {
+			const Arg a = {.ui = 1 << i};
+			view(&a);
+			focus(c);
+		}
+	}
+}