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#!/usr/bin/env python3
#
# Copyright (C) 2018 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# File: vyos-show-version
# Purpose:
# Displays image version and system information.
# Used by the "run show version" command.
import os
import argparse
from sys import exit
from vyos.config import Config
from vyos.util import run
parser = argparse.ArgumentParser()
parser.add_argument("-a", "--all", action="store_true", help="Reset all cache")
parser.add_argument("domain", type=str, nargs="?", help="Domain to reset cache entries for")
if __name__ == '__main__':
args = parser.parse_args()
# Do nothing if service is not configured
c = Config()
if not c.exists_effective(['service', 'dns', 'forwarding']):
print("DNS forwarding is not configured")
exit(0)
if args.all:
run("rec_control wipe-cache \'.$\'")
exit(0)
elif args.domain:
run("rec_control wipe-cache \'{0}$\'".format(args.domain))
else:
parser.print_help()
exit(1)
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