prerm is in firewalld 0.4.4.6-1.
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 29 30 31 32 33 34 35 36 37 38 39 40  | #!/bin/sh
set -e
case "$1" in
    # only remove in remove/deconfigure so we don't disrupt users' preferences
    remove|deconfigure)
        update-alternatives --remove org.fedoraproject.FirewallD1.policy \
	    /usr/share/polkit-1/actions/org.fedoraproject.FirewallD1.server.policy.choice
        update-alternatives --remove org.fedoraproject.FirewallD1.policy \
            /usr/share/polkit-1/actions/org.fedoraproject.FirewallD1.desktop.policy.choice
        ;;
    upgrade|failed-upgrade)
        ;;
    *)
        echo "prerm called with unknown argument \`$1'" >&2
        exit 1
        ;;
esac
# Automatically added by dh_installinit/10.10.7ubuntu2
if [ -x "/etc/init.d/firewalld" ] && [ "$1" = remove ]; then
	invoke-rc.d firewalld stop || exit $?
fi
# End automatically added section
# Automatically added by dh_python3:
if which py3clean >/dev/null 2>&1; then
	py3clean -p firewalld 
else
	dpkg -L firewalld | perl -ne 's,/([^/]*)\.py$,/__pycache__/\1.*, or next; unlink $_ or die $! foreach glob($_)'
	find /usr/lib/python3/dist-packages/ -type d -name __pycache__ -empty -print0 | xargs --null --no-run-if-empty rmdir
fi
# End automatically added section
exit 0
 |