xorg: restart dwm on changes otherwise logout

.xinitrc

@@ -9,6 +9,17 @@ xrandr --auto
 
 setbg
 
-while true; do
-    dwm || exit
+csum=""
+new_csum=$(sha1sum $(which dwm))
+while true
+do
+    if [ "$csum" != "$new_csum" ]
+    then
+        csum=$new_csum
+        dwm
+    else
+        exit 0
+    fi
+    new_csum=$(sha1sum $(which dwm))
+    sleep 0.5
 done