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#!/usr/bin/python
# (c) 2012, Stephen Fromm <sfromm@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible 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 Ansible. If not, see <http://www.gnu.org/licenses/>.
DOCUMENTATION = '''
---
module: seboolean
short_description: Toggles SELinux booleans.
description:
- Toggles SELinux booleans.
version_added: "0.7"
options:
name:
description:
- Name of the boolean to configure
required: true
default: null
persistent:
description:
- Set to C(yes) if the boolean setting should survive a reboot
required: false
default: no
choices: [ "yes", "no" ]
state:
description:
- Desired boolean value
required: true
default: null
choices: [ 'yes', 'no' ]
notes:
- Not tested on any debian based system
requirements: [ ]
author: "Stephen Fromm (@sfromm)"
'''
EXAMPLES = '''
# Set (httpd_can_network_connect) flag on and keep it persistent across reboots
- seboolean:
name: httpd_can_network_connect
state: yes
persistent: yes
'''
try:
import selinux
HAVE_SELINUX=True
except ImportError:
HAVE_SELINUX=False
try:
import semanage
HAVE_SEMANAGE=True
except ImportError:
HAVE_SEMANAGE=False
def has_boolean_value(module, name):
bools = []
try:
rc, bools = selinux.security_get_boolean_names()
except OSError:
module.fail_json(msg="Failed to get list of boolean names")
if to_bytes(name) in bools:
return True
else:
return False
def get_boolean_value(module, name):
state = 0
try:
state = selinux.security_get_boolean_active(name)
except OSError:
module.fail_json(msg="Failed to determine current state for boolean %s" % name)
if state == 1:
return True
else:
return False
# The following method implements what setsebool.c does to change
# a boolean and make it persist after reboot..
def semanage_boolean_value(module, name, state):
rc = 0
value = 0
if state:
value = 1
handle = semanage.semanage_handle_create()
if handle is None:
module.fail_json(msg="Failed to create semanage library handle")
try:
managed = semanage.semanage_is_managed(handle)
if managed < 0:
module.fail_json(msg="Failed to determine whether policy is manage")
if managed == 0:
if os.getuid() == 0:
module.fail_json(msg="Cannot set persistent booleans without managed policy")
else:
module.fail_json(msg="Cannot set persistent booleans; please try as root")
if semanage.semanage_connect(handle) < 0:
module.fail_json(msg="Failed to connect to semanage")
if semanage.semanage_begin_transaction(handle) < 0:
module.fail_json(msg="Failed to begin semanage transaction")
rc, sebool = semanage.semanage_bool_create(handle)
if rc < 0:
module.fail_json(msg="Failed to create seboolean with semanage")
if semanage.semanage_bool_set_name(handle, sebool, name) < 0:
module.fail_json(msg="Failed to set seboolean name with semanage")
semanage.semanage_bool_set_value(sebool, value)
rc, boolkey = semanage.semanage_bool_key_extract(handle, sebool)
if rc < 0:
module.fail_json(msg="Failed to extract boolean key with semanage")
if semanage.semanage_bool_modify_local(handle, boolkey, sebool) < 0:
module.fail_json(msg="Failed to modify boolean key with semanage")
if semanage.semanage_bool_set_active(handle, boolkey, sebool) < 0:
module.fail_json(msg="Failed to set boolean key active with semanage")
semanage.semanage_bool_key_free(boolkey)
semanage.semanage_bool_free(sebool)
semanage.semanage_set_reload(handle, 0)
if semanage.semanage_commit(handle) < 0:
module.fail_json(msg="Failed to commit changes to semanage")
semanage.semanage_disconnect(handle)
semanage.semanage_handle_destroy(handle)
except Exception:
e = get_exception()
module.fail_json(msg="Failed to manage policy for boolean %s: %s" % (name, str(e)))
return True
def set_boolean_value(module, name, state):
rc = 0
value = 0
if state:
value = 1
try:
rc = selinux.security_set_boolean(name, value)
except OSError:
module.fail_json(msg="Failed to set boolean %s to %s" % (name, value))
if rc == 0:
return True
else:
return False
def main():
module = AnsibleModule(
argument_spec = dict(
name=dict(required=True),
persistent=dict(default='no', type='bool'),
state=dict(required=True, type='bool')
),
supports_check_mode=True
)
if not HAVE_SELINUX:
module.fail_json(msg="This module requires libselinux-python support")
if not HAVE_SEMANAGE:
module.fail_json(msg="This module requires libsemanage-python support")
if not selinux.is_selinux_enabled():
module.fail_json(msg="SELinux is disabled on this host.")
name = module.params['name']
persistent = module.params['persistent']
state = module.params['state']
result = {}
result['name'] = name
if hasattr(selinux, 'selinux_boolean_sub'):
# selinux_boolean_sub allows sites to rename a boolean and alias the old name
# Feature only available in selinux library since 2012.
name = selinux.selinux_boolean_sub(name)
if not has_boolean_value(module, name):
module.fail_json(msg="SELinux boolean %s does not exist." % name)
cur_value = get_boolean_value(module, name)
if cur_value == state:
result['state'] = cur_value
result['changed'] = False
module.exit_json(**result)
if module.check_mode:
module.exit_json(changed=True)
if persistent:
r = semanage_boolean_value(module, name, state)
else:
r = set_boolean_value(module, name, state)
result['changed'] = r
if not r:
module.fail_json(msg="Failed to set boolean %s to %s" % (name, value))
try:
selinux.security_commit_booleans()
except:
module.fail_json(msg="Failed to commit pending boolean %s value" % name)
module.exit_json(**result)
# import module snippets
from ansible.module_utils.basic import *
from ansible.module_utils._text import to_bytes
if __name__ == '__main__':
main()
|
