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# Authors:
# Alexander Bokovoy <abokovoy@redhat.com>
# Tomas Babej <tbabej@redhat.com>
#
# Copyright (C) 2011-2014 Red Hat
# see file 'COPYING' for use and warranty information
#
# This program 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.
#
# 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/>.
'''
This module contains default platform-specific implementations of system tasks.
'''
import pwd
import grp
from pkg_resources import parse_version
from ipaplatform.paths import paths
from ipapython.ipa_log_manager import log_mgr
from ipapython import ipautil
log = log_mgr.get_logger(__name__)
class BaseTaskNamespace(object):
def restore_context(self, filepath):
"""
Restore SELinux security context on the given filepath.
No return value expected.
"""
raise NotImplementedError()
def backup_and_replace_hostname(self, fstore, statestore, hostname):
"""
Backs up the current hostname in the statestore (so that it can be
restored by the restore_hostname platform task).
Makes sure that new hostname (passed via hostname argument) is set
as a new pemanent hostname for this host.
No return value expected.
"""
raise NotImplementedError()
def reload_systemwide_ca_store(self):
"""
Reloads the systemwide CA store.
Returns True if the operation succeeded, False otherwise.
"""
raise NotImplementedError()
def insert_ca_certs_into_systemwide_ca_store(self, ca_certs):
"""
Adds CA certificates from 'ca_certs' to the systemwide CA store
(if available on the platform).
Returns True if the operation succeeded, False otherwise.
"""
raise NotImplementedError()
def remove_ca_certs_from_systemwide_ca_store(self):
"""
Removes IPA CA certificates from the systemwide CA store
(if available on the platform).
Returns True if the operation succeeded, False otherwise.
"""
raise NotImplementedError()
def get_svc_list_file(self):
"""
Returns the path to the IPA service list file.
"""
return paths.SVC_LIST_FILE
def check_selinux_status(self):
"""
Checks if SELinux is available on the platform. If it is, this task
also makes sure that restorecon tool is available.
If SELinux is available, but restorcon tool is not installed, raises
an RuntimeError, which suggest installing the package containing
restorecon and rerunning the installation.
"""
raise NotImplementedError()
def restore_hostname(self, fstore, statestore):
"""
Restores the original hostname as backed up in the
backup_and_replace_hostname platform task.
"""
raise NotImplementedError()
def restore_pre_ipa_client_configuration(self, fstore, statestore,
was_sssd_installed,
was_sssd_configured):
"""
Restores the pre-ipa-client configuration that was modified by the
following platform tasks:
modify_nsswitch_pam_stack
modify_pam_to_use_krb5
"""
raise NotImplementedError()
def set_nisdomain(self, nisdomain):
"""
Sets the NIS domain name to 'nisdomain'.
"""
raise NotImplementedError()
def modify_nsswitch_pam_stack(self, sssd, mkhomedir, statestore):
"""
If sssd flag is true, configure pam and nsswtich so that SSSD is used
for retrieving user information and authentication.
Otherwise, configure pam and nsswitch to leverage pure LDAP.
"""
raise NotImplementedError()
def modify_pam_to_use_krb5(self, statestore):
"""
Configure pam stack to allow kerberos authentication.
"""
raise NotImplementedError()
def backup_auth_configuration(self, path):
"""
Create backup of access control configuration.
:param path: store the backup here. This will be passed to
restore_auth_configuration as well.
"""
raise NotImplementedError()
def restore_auth_configuration(self, path):
"""
Restore backup of access control configuration.
:param path: restore the backup from here.
"""
raise NotImplementedError()
def set_selinux_booleans(self, required_settings, backup_func=None):
"""Set the specified SELinux booleans
:param required_settings: A dictionary mapping the boolean names
to desired_values.
The desired value can be 'on' or 'off',
or None to leave the setting unchanged.
:param backup_func: A function called for each boolean with two
arguments: the name and the previous value
If SELinux is disabled, return False; on success returns True.
If setting the booleans fails,
an ipapython.errors.SetseboolError is raised.
"""
raise NotImplementedError()
def create_system_user(self, name, group, homedir, shell, uid=None, gid=None, comment=None, create_homedir=False):
"""Create a system user with a corresponding group"""
try:
grp.getgrnam(group)
except KeyError:
log.debug('Adding group %s', group)
args = [paths.GROUPADD, '-r', group]
if gid:
args += ['-g', str(gid)]
try:
ipautil.run(args)
log.debug('Done adding group')
except ipautil.CalledProcessError as e:
log.critical('Failed to add group: %s', e)
raise
else:
log.debug('group %s exists', group)
try:
pwd.getpwnam(name)
except KeyError:
log.debug('Adding user %s', name)
args = [
paths.USERADD,
'-g', group,
'-d', homedir,
'-s', shell,
'-r', name,
]
if uid:
args += ['-u', str(uid)]
if comment:
args += ['-c', comment]
if create_homedir:
args += ['-m']
else:
args += ['-M']
try:
ipautil.run(args)
log.debug('Done adding user')
except ipautil.CalledProcessError as e:
log.critical('Failed to add user: %s', e)
raise
else:
log.debug('user %s exists', name)
def parse_ipa_version(self, version):
"""
:param version: textual version
:return: object implementing proper __cmp__ method for version compare
"""
return parse_version(version)
def set_hostname(self, hostname):
"""
Set hostname for the system
No return value expected, raise CalledProcessError when error occurred
"""
raise NotImplementedError()
def configure_httpd_service_ipa_conf(self):
"""Configure httpd service to work with IPA"""
raise NotImplementedError()
def remove_httpd_service_ipa_conf(self):
"""Remove configuration of httpd service of IPA"""
raise NotImplementedError()
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