- if ls /boot/grml/*iso >/dev/null 2>&1 ; then
- echo "ISOs found inside /boot/grml, invoking update-grub:"
- update-grub
+ # default, unless configured otherwise:
+ ISO_LOCATION=/boot/grml
+
+ if [ -r /etc/default/grml-rescueboot ] ; then
+ . /etc/default/grml-rescueboot
+ fi
+
+ if ! ls "${ISO_LOCATION}"/*iso >/dev/null 2>&1 ; then
+ echo "INFO: No *.iso files found inside ${ISO_LOCATION}."
+ echo "INFO: Please create ${ISO_LOCATION} and place rescue ISO(s) there."
+ echo "INFO: Finally invoke update-grub and enjoy your rescue system."