timezone
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timezone
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	#!/usr/bin/env python3
	#
	# Copyright (C) 2019 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/>.

	import argparse

	from sys import exit
	from subprocess import Popen, PIPE, STDOUT

	def _cmd(cmd):
	p = Popen(cmd, stdout=PIPE, stderr=STDOUT, shell=True)
	tmp = p.communicate()[0].strip()
	return tmp.decode()

	parser = argparse.ArgumentParser()
	parser.add_argument("--validate", action="store", help="Check if timezone is valid")

	if __name__ == '__main__':
	args = parser.parse_args()

	if args.validate:
	tz_data = _cmd('find /usr/share/zoneinfo/posix -type f -or -type l \| sed -e s:/usr/share/zoneinfo/posix/::')
	tz_data = tz_data.split('\n')
	# if timezone can't be found in list it's invalid
	if args.validate not in tz_data:
	exit(1)
	else:
	parser.print_help()
	exit(1)

	exit(0)