#!/bin/sh
set -e

action="$1"

umask 022


update_ssh_group_name() {
	# The _ssh group used to be called ssh, but that could clash with
	# locally-created user accounts.  Since this only exists as an
	# otherwise-empty group to which ssh-agent is installed setgid, it's
	# easy to rename.
	if getent group ssh >/dev/null && ! getent group _ssh >/dev/null; then
		groupmod -n _ssh ssh
	fi
}

set_ssh_agent_permissions() {
	if ! getent group _ssh >/dev/null; then
		addgroup --system --quiet --force-badname _ssh
	fi
	if ! dpkg-statoverride --list /usr/bin/ssh-agent >/dev/null; then
		chgrp _ssh /usr/bin/ssh-agent
		chmod 2755 /usr/bin/ssh-agent
	fi
}

remove_obsolete_alternatives() {
	update-alternatives --remove rcp /usr/bin/scp
	update-alternatives --remove rlogin /usr/bin/slogin
	update-alternatives --remove rsh /usr/bin/ssh
}


if [ "$action" = configure ]; then
	if dpkg --compare-versions "$2" lt-nl 1:8.4p1-6~; then
		update_ssh_group_name
	fi
	set_ssh_agent_permissions
	if dpkg --compare-versions "$2" lt-nl 1:9.1p1-1~; then
		remove_obsolete_alternatives
	fi
fi

#DEBHELPER#

exit 0