--- /dev/null
+#!/bin/sh -eux
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# set a default HOME_DIR environment variable if not set
+HOME_DIR="${HOME_DIR:-/home/vagrant}";
+
+case "$PACKER_BUILDER_TYPE" in
+virtualbox-iso|virtualbox-ovf)
+ VER="`cat $HOME_DIR/.vbox_version`";
+ ISO="VBoxGuestAdditions_$VER.iso";
+ mkdir -p /tmp/vbox;
+ mount -o loop $HOME_DIR/$ISO /tmp/vbox;
+ sh /tmp/vbox/VBoxLinuxAdditions.run \
+ || echo "VBoxLinuxAdditions.run exited $? and is suppressed." \
+ "For more read https://www.virtualbox.org/ticket/12479";
+ umount /tmp/vbox;
+ rm -rf /tmp/vbox;
+ rm -f $HOME_DIR/*.iso;
+ ;;
+esac