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# Copyright (c) 2013-2014 Will Thames <will@thames.id.au>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
from ansiblelint.rules import AnsibleLintRule
class OctalPermissionsRule(AnsibleLintRule):
id = '202'
shortdesc = 'Octal file permissions must contain leading zero or be a string'
description = (
'Numeric file permissions without leading zero can behave '
'in unexpected ways. See '
'http://docs.ansible.com/ansible/file_module.html'
)
severity = 'VERY_HIGH'
tags = ['formatting', 'ANSIBLE0009']
version_added = 'historic'
_modules = ['assemble', 'copy', 'file', 'ini_file', 'lineinfile',
'replace', 'synchronize', 'template', 'unarchive']
def is_invalid_permission(self, mode):
# sensible file permission modes don't
# have write bit set when read bit is
# not set and don't have execute bit set
# when user execute bit is not set.
# also, user permissions are more generous than
# group permissions and user and group permissions
# are more generous than world permissions
other_write_without_read = (mode % 8 and mode % 8 < 4 and
not (mode % 8 == 1 and (mode >> 6) % 2 == 1))
group_write_without_read = ((mode >> 3) % 8 and (mode >> 3) % 8 < 4 and
not ((mode >> 3) % 8 == 1 and (mode >> 6) % 2 == 1))
user_write_without_read = ((mode >> 6) % 8 and (mode >> 6) % 8 < 4 and
not (mode >> 6) % 8 == 1)
other_more_generous_than_group = mode % 8 > (mode >> 3) % 8
other_more_generous_than_user = mode % 8 > (mode >> 6) % 8
group_more_generous_than_user = (mode >> 3) % 8 > (mode >> 6) % 8
return (other_write_without_read or
group_write_without_read or
user_write_without_read or
other_more_generous_than_group or
other_more_generous_than_user or
group_more_generous_than_user)
def matchtask(self, file, task):
if task["action"]["__ansible_module__"] in self._modules:
mode = task['action'].get('mode', None)
if isinstance(mode, str):
return False
if isinstance(mode, int):
return self.is_invalid_permission(mode)
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