postrm is in munin-node 2.0.19-3.
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 41 42 43 44 45 46 47 48 49 50 51  | #! /bin/sh
set -e
# workaround for bug #198522
delete_dir_if_empty() {
	if [ ! -d "$1" ]; then
		return 0;
	fi
	rmdir --ignore-fail-on-non-empty $1;
}
if [ "$1" = "purge" ]; then
	# delete dangling symlinks
	test -d /etc/munin/plugins/ && for plugin in $(find /etc/munin/plugins/ -type l); do
		if [ ! -e $(readlink $plugin) ]; then
			rm $plugin
		fi
	done
	# since 2.0.6 /var/lib/munin-node/plugin-state is used and /var/lib/munin/plugin-state not, 
	# so this should be cleaned up post wheezy.
	#
	# just like #198522 (see above..) is fixed since 2006 ;)
	rm -rf /var/lib/munin/plugin-state
	rm -f /var/log/munin/munin-node.log*
	rm -f /var/log/munin/munin-node-configure.log*
	delete_dir_if_empty /var/lib/munin
	delete_dir_if_empty /var/log/munin
	delete_dir_if_empty /etc/munin/plugin-conf.d
	delete_dir_if_empty /etc/munin/plugins
	delete_dir_if_empty /etc/munin
fi
# Automatically added by dh_systemd_enable
if [ "$1" = "remove" ]; then
	if [ -x "/usr/bin/deb-systemd-helper" ]; then
		deb-systemd-helper mask munin-node.service >/dev/null
	fi
fi
if [ "$1" = "purge" ]; then
	if [ -x "/usr/bin/deb-systemd-helper" ]; then
		export _DEB_SYSTEMD_HELPER_PURGE=1
		deb-systemd-helper disable munin-node.service >/dev/null
		deb-systemd-helper unmask munin-node.service >/dev/null
	fi
fi
# End automatically added section
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