prerm is in grub-pc 1.99-21ubuntu3.19.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | #!/bin/bash
set -e
case "$1" in
remove|deconfigure)
. /usr/share/debconf/confmodule
db_get grub-pc/chainload_from_menu.lst
if $RET && test -e /boot/grub/menu.lst ; then
echo "Saving menu.lst backup in /boot/grub/menu.lst_backup_by_grub2_prerm" >&2
cp /boot/grub/menu.lst{,_backup_by_grub2_prerm}
echo "Running update-grub Legacy to remove our core.img in it" >&2
/usr/lib/grub-legacy/update-grub 2>&1 | sed -e "s/^/ /g" >&2
fi
;;
failed-upgrade|upgrade)
;;
*)
echo "prerm called with unknown argument \`$1'" >&2
exit 1
;;
esac
# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.
exit 0
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