script: add update-gdm-monitors

scripts/.local/bin/update-gdm-monitors

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+# updates gdm to reflect the curent users monitors configurations
+
+main(){
+
+    [ "$USER" = "root" ] && echo "Don't run as root" && exit 1
+
+    set -e
+
+    sudo cp ~/.config/monitors.xml /var/lib/gdm/.config/
+    sudo chown gdm:gdm /var/lib/gdm/.config/monitors.xml
+
+}
+
+if [ "$1" = "-h" ] || [ "$1" = "--help" ] 
+then
+    echo "Usage:"
+    echo "  \$ $0"
+else
+    main
+fi
+