Separate grub update

src/freedombone-utils-setup

 
     if [[ $ARCHITECTURE == 'qemu'* || $ARCHITECTURE == 'amd64' || $ARCHITECTURE == 'x86_64' || $ARCHITECTURE == 'i686' || $ARCHITECTURE == 'i386' ]]; then
         apt-get -yq install grub2
-        sed -i 's|GRUB_CMDLINE_LINUX_DEFAULT=.*|GRUB_CMDLINE_LINUX_DEFAULT="quiet ifnames=0 slub_debug=FZP slab_nomerge page_poison=1"|g' /etc/default/grub
-        update-grub
     fi
 
     if [ ! -d $INSTALL_DIR ]; then
     mark_completed $FUNCNAME
 }
 
+function setup_grub {
+    if [[ $ARCHITECTURE == 'qemu'* || $ARCHITECTURE == 'amd64' || $ARCHITECTURE == 'x86_64' || $ARCHITECTURE == 'i686' || $ARCHITECTURE == 'i386' ]]; then
+        if ! grep -q 'iframes=0' /etc/default/grub; then
+            sed -i 's|GRUB_CMDLINE_LINUX_DEFAULT=.*|GRUB_CMDLINE_LINUX_DEFAULT="quiet ifnames=0 slub_debug=FZP slab_nomerge page_poison=1"|g' /etc/default/grub
+            update-grub
+        fi
+    fi
+}
+
 function admin_user_sudo {
     if ! grep -q "$MY_USERNAME  ALL=(ALL) ALL" $rootdir/etc/sudoers; then
         echo "$MY_USERNAME  ALL=(ALL) ALL" >> $rootdir/etc/sudoers
     function_check initial_setup
     initial_setup
 
+    function_check setup_grub
+    setup_grub
+
     function_check install_tor
     install_tor