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#!/bin/sh

set -e

remove_gns() {
	# abort if /etc/nsswitch.conf does not exist
	if ! [ -e /etc/nsswitch.conf ]; then
		return
	fi
	perl -i -pe '
		my @remove=(
			"gns [NOTFOUND=return]",
		);
		sub remove {
			my $s=shift;
			foreach my $bit (@remove) {
				$s=~s/\s+\Q$bit\E//g;
			}
			return $s;
		}
		s/^(hosts:)(.*)/$1.remove($2)/e;
	' /etc/nsswitch.conf
}

_USERNAME="gnunet"
_GROUPNAME="gnunet"
GNUNETDNS_GROUP="gnunetdns"
if [ -e /usr/share/debconf/confmodule ]
then
        . /usr/share/debconf/confmodule
        db_version 2.0

        db_get gnunet-dns/libnsswitch
        _LIBNSSWITCH="${RET}"
fi


case "${1}" in
	purge)
		if $_LIBNSSWITCH
		then
			rm -rf /usr/lib/x86_64-linux-gnu/usr/libnss_gns.so.2
			rm -rf /usr/lib/x86_64-linux-gnu/usr/libnss_gns4.so.2
			rm -rf /usr/lib/x86_64-linux-gnu/usr/libnss_gns6.so.2
			remove_gns
		fi

		rm -rf /var/log/gnunet.log /var/lib/gnunet /etc/default/gnunet
		;;

	remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)

		if $_LIBNSSWITCH
		then
			rm -rf /usr/lib/x86_64-linux-gnu/usr/libnss_gns.so.2
			rm -rf /usr/lib/x86_64-linux-gnu/usr/libnss_gns4.so.2
			rm -rf /usr/lib/x86_64-linux-gnu/usr/libnss_gns6.so.2
			remove_gns
		fi

		;;

	*)
		echo "postrm called with unknown argument \`${1}'" >&2
		exit 1
		;;
esac

#DEBHELPER#

exit 0