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Check if SELinux is installed on system (#24437)

Browse source 
* Refactor code
* PEP8 fixes
* Check if /etc/selinux/config file exists before
  proceeding any other operations

Fixes #21622

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
This commit is contained in:
Abhijeet Kasurde 2017-06-29 00:09:52 +05:30 committed by John R Barker
parent 5be32aa5af
commit bb847e332d
2 changed files with 73 additions and 71 deletions
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123
lib/ansible/modules/system/selinux.py
View file

@ -71,76 +71,77 @@ EXAMPLES = '''
import os
import re
import sys
try:
import selinux
HAS_SELINUX = True
except ImportError:
HAS_SELINUX = False
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.facts import get_file_lines
# getter subroutines
def get_config_state(configfile):
myfile = open(configfile, "r")
lines = myfile.readlines()
myfile.close()
lines = get_file_lines(configfile)
for line in lines:
stateline = re.match('^SELINUX=.*$', line)
if (stateline):
return(line.split('=')[1].strip())
stateline = re.match(r'^SELINUX=.*$', line)
if stateline:
return line.split('=')[1].strip()
def get_config_policy(configfile):
myfile = open(configfile, "r")
lines = myfile.readlines()
myfile.close()
lines = get_file_lines(configfile)
for line in lines:
stateline = re.match('^SELINUXTYPE=.*$', line)
if (stateline):
return(line.split('=')[1].strip())
stateline = re.match(r'^SELINUXTYPE=.*$', line)
if stateline:
return line.split('=')[1].strip()
# setter subroutines
def set_config_state(state, configfile):
#SELINUX=permissive
# SELINUX=permissive
# edit config file with state value
stateline='SELINUX=%s' % state
myfile = open(configfile, "r")
lines = myfile.readlines()
myfile.close()
myfile = open(configfile, "w")
for line in lines:
myfile.write(re.sub(r'^SELINUX=.*', stateline, line))
myfile.close()
stateline = 'SELINUX=%s' % state
def set_state(state):
if (state == 'enforcing'):
lines = get_file_lines(configfile)
with open(configfile, "w") as write_file:
for line in lines:
write_file.write(re.sub(r'^SELINUX=.*', stateline, line))
def set_state(module, state):
if state == 'enforcing':
selinux.security_setenforce(1)
elif (state == 'permissive'):
elif state == 'permissive':
selinux.security_setenforce(0)
elif (state == 'disabled'):
elif state == 'disabled':
pass
else:
msg = 'trying to set invalid runtime state %s' % state
module.fail_json(msg=msg)
def set_config_policy(policy, configfile):
# edit config file with state value
#SELINUXTYPE=targeted
policyline='SELINUXTYPE=%s' % policy
myfile = open(configfile, "r")
lines = myfile.readlines()
myfile.close()
myfile = open(configfile, "w")
# SELINUXTYPE=targeted
policyline = 'SELINUXTYPE=%s' % policy
lines = get_file_lines(configfile)
with open(configfile, "w") as write_file:
for line in lines:
myfile.write(re.sub(r'^SELINUXTYPE=.*', policyline, line))
myfile.close()
write_file.write(re.sub(r'^SELINUXTYPE=.*', policyline, line))
def main():
module = AnsibleModule(
argument_spec = dict(
argument_spec=dict(
policy=dict(required=False),
state=dict(choices=['enforcing', 'permissive', 'disabled'], required=True),
configfile=dict(aliases=['conf','file'], default='/etc/selinux/config')
configfile=dict(aliases=['conf', 'file'], default='/etc/selinux/config')
),
supports_check_mode=True
)
@ -149,7 +150,7 @@ def main():
module.fail_json(msg='libselinux-python required for this module')
# global vars
changed=False
changed = False
msgs = []
configfile = module.params['configfile']
policy = module.params['policy']
@ -157,17 +158,24 @@ def main():
runtime_enabled = selinux.is_selinux_enabled()
runtime_policy = selinux.selinux_getpolicytype()[1]
runtime_state = 'disabled'
if (runtime_enabled):
if runtime_enabled:
# enabled means 'enforcing' or 'permissive'
if (selinux.security_getenforce()):
if selinux.security_getenforce():
runtime_state = 'enforcing'
else:
runtime_state = 'permissive'
if not os.path.isfile(configfile):
module.fail_json(msg="Unable to find file {0}".format(configfile),
details="Please install SELinux-policy package, "
"if this package is not installed previously.")
config_policy = get_config_policy(configfile)
config_state = get_config_state(configfile)
# check to see if policy is set if state is not 'disabled'
if (state != 'disabled'):
if state != 'disabled':
if not policy:
module.fail_json(msg='policy is required if state is not \'disabled\'')
else:
@ -175,53 +183,48 @@ def main():
policy = config_policy
# check changed values and run changes
if (policy != runtime_policy):
if policy != runtime_policy:
if module.check_mode:
module.exit_json(changed=True)
# cannot change runtime policy
msgs.append('reboot to change the loaded policy')
changed=True
changed = True
if (policy != config_policy):
if policy != config_policy:
if module.check_mode:
module.exit_json(changed=True)
msgs.append('config policy changed from \'%s\' to \'%s\'' % (config_policy, policy))
set_config_policy(policy, configfile)
changed=True
changed = True
if (state != runtime_state):
if state != runtime_state:
if module.check_mode:
module.exit_json(changed=True)
if (runtime_enabled):
if (state == 'disabled'):
if (runtime_state != 'permissive'):
if runtime_enabled:
if state == 'disabled':
if runtime_state != 'permissive':
# Temporarily set state to permissive
set_state('permissive')
set_state(module, 'permissive')
msgs.append('runtime state temporarily changed from \'%s\' to \'permissive\', state change will take effect next reboot' % (runtime_state))
else:
msgs.append('state change will take effect next reboot')
else:
set_state(state)
set_state(module, state)
msgs.append('runtime state changed from \'%s\' to \'%s\'' % (runtime_state, state))
else:
msgs.append('state change will take effect next reboot')
changed=True
changed = True
if (state != config_state):
if state != config_state:
if module.check_mode:
module.exit_json(changed=True)
msgs.append('config state changed from \'%s\' to \'%s\'' % (config_state, state))
set_config_state(state, configfile)
changed=True
changed = True
module.exit_json(changed=changed, msg=', '.join(msgs),
configfile=configfile,
policy=policy, state=state)
module.exit_json(changed=changed, msg=', '.join(msgs), configfile=configfile, policy=policy, state=state)
#################################################
# import module snippets
from ansible.module_utils.basic import *
if __name__ == '__main__':
main()

1
test/sanity/pep8/legacy-files.txt
View file

@ -539,7 +539,6 @@ lib/ansible/modules/system/puppet.py
lib/ansible/modules/system/runit.py
lib/ansible/modules/system/seboolean.py
lib/ansible/modules/system/sefcontext.py
lib/ansible/modules/system/selinux.py
lib/ansible/modules/system/seport.py
lib/ansible/modules/system/service.py
lib/ansible/modules/system/solaris_zone.py