dns_forwarding_reset.py
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dns_forwarding_reset.py
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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)