--- dwm-4.4.1/main.c	2007-08-26 12:53:49.000000000 +0200
+++ dwm-4.4.1-new/main.c	2007-09-03 20:37:44.000000000 +0200
@@ -6,6 +6,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <signal.h>
 #include <sys/select.h>
 #include <X11/cursorfont.h>
 #include <X11/keysym.h>
@@ -13,6 +14,8 @@
 #include <X11/Xproto.h>
 #include <X11/Xutil.h>
 
+extern char **environ;
+
 /* extern */
 
 char stext[256];
@@ -36,10 +39,13 @@ Window root, barwin;
 static int (*xerrorxlib)(Display *, XErrorEvent *);
 static Bool otherwm, readin;
 static Bool running = True;
+static Bool reload = False;
+static char **cargv;
 
 static void
 cleanup(void) {
-	close(STDIN_FILENO);
+	if (!reload)
+		close(STDIN_FILENO);
 	while(stack) {
 		unban(stack);
 		unmanage(stack);
@@ -60,6 +66,18 @@ cleanup(void) {
 	free(seltags);
 }
 
+static void
+sigusr1(int notused) {
+	quit(NULL);
+	reload = True;
+}
+
+static void
+doreload(void) {
+	execvp(cargv[0], cargv);
+	eprint("Can't exec: %s\n", strerror(errno));
+}
+
 static unsigned long
 initcolor(const char *colstr) {
 	Colormap cmap = DefaultColormap(dpy, screen);
@@ -230,6 +248,8 @@ setup(void) {
 		XSetFont(dpy, dc.gc, dc.font.xfont->fid);
 	/* multihead support */
 	selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
+	if (signal(SIGUSR1, sigusr1) == SIG_ERR) 
+		eprint("Can't bind to signal USR1\n");
 }
 
 /*
@@ -307,6 +327,7 @@ main(int argc, char *argv[]) {
 		eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
 	else if(argc != 1)
 		eprint("usage: dwm [-v]\n");
+	cargv = argv;
 	setlocale(LC_CTYPE, "");
 	if(!(dpy = XOpenDisplay(0)))
 		eprint("dwm: cannot open display\n");
@@ -369,5 +390,6 @@ main(int argc, char *argv[]) {
 	}
 	cleanup();
 	XCloseDisplay(dpy);
+	if (reload) doreload();
 	return 0;
 }