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9e877585e2
We don't have a specific requires on the policycoreutils package. It gets pulled in as a dependency on the server anyway, but checking there is like a belt and suspenders. On the client we don't require SELinux at all. If SELinux is enabled however we need to set things up properly. This is provided by the policycoreutils package so fail if that isn't available. https://fedorahosted.org/freeipa/ticket/2368
203 lines
7.8 KiB
Python
203 lines
7.8 KiB
Python
# Authors: Simo Sorce <ssorce@redhat.com>
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# Alexander Bokovoy <abokovoy@redhat.com>
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#
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# Copyright (C) 2007-2011 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import tempfile
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import re
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import os
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import stat
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import sys
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import socket
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from ipapython import ipautil
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from ipapython.platform import base
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# All what we allow exporting directly from this module
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# Everything else is made available through these symbols when they are
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# directly imported into ipapython.services:
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#
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# authconfig -- class reference for platform-specific implementation of
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# authconfig(8)
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# service -- class reference for platform-specific implementation of a
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# PlatformService class
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# knownservices -- factory instance to access named services IPA cares about,
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# names are ipapython.services.wellknownservices
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# backup_and_replace_hostname -- platform-specific way to set hostname and
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# make it persistent over reboots
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# restore_context -- platform-sepcific way to restore security context, if
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# applicable
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# check_selinux_status -- platform-specific way to see if SELinux is enabled
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# and restorecon is installed.
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__all__ = ['authconfig', 'service', 'knownservices', 'backup_and_replace_hostname', 'restore_context', 'check_selinux_status']
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class RedHatService(base.PlatformService):
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def stop(self, instance_name="", capture_output=True):
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ipautil.run(["/sbin/service", self.service_name, "stop", instance_name], capture_output=capture_output)
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def start(self, instance_name="", capture_output=True):
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ipautil.run(["/sbin/service", self.service_name, "start", instance_name], capture_output=capture_output)
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def restart(self, instance_name="", capture_output=True):
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ipautil.run(["/sbin/service", self.service_name, "restart", instance_name], capture_output=capture_output)
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def is_running(self, instance_name=""):
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ret = True
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try:
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(sout,serr,rcode) = ipautil.run(["/sbin/service", self.service_name, "status", instance_name])
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if sout.find("is stopped") >= 0:
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ret = False
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except ipautil.CalledProcessError:
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ret = False
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return ret
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def is_installed(self):
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installed = True
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try:
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ipautil.run(["/sbin/service", self.service_name, "status"])
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except ipautil.CalledProcessError, e:
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if e.returncode == 1:
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# service is not installed or there is other serious issue
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installed = False
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return installed
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def is_enabled(self, instance_name=""):
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(stdout, stderr, returncode) = ipautil.run(["/sbin/chkconfig", self.service_name],raiseonerr=False)
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return (returncode == 0)
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def enable(self, instance_name=""):
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ipautil.run(["/sbin/chkconfig", self.service_name, "on"])
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def disable(self, instance_name=""):
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ipautil.run(["/sbin/chkconfig", self.service_name, "off"])
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def install(self, instance_name=""):
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ipautil.run(["/sbin/chkconfig", "--add", self.service_name])
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def remove(self, instance_name=""):
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ipautil.run(["/sbin/chkconfig", "--del", self.service_name])
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class RedHatSSHService(RedHatService):
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def get_config_dir(self, instance_name=""):
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return '/etc/ssh'
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class RedHatAuthConfig(base.AuthConfig):
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"""
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AuthConfig class implements system-independent interface to configure
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system authentication resources. In Red Hat-produced systems this is done with
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authconfig(8) utility.
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"""
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def __build_args(self):
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args = []
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for (option, value) in self.parameters.items():
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if type(value) is bool:
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if value:
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args.append("--enable%s" % (option))
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else:
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args.append("--disable%s" % (option))
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elif type(value) in (tuple, list):
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args.append("--%s" % (option))
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args.append("%s" % (value[0]))
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elif value is None:
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args.append("--%s" % (option))
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else:
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args.append("--%s%s" % (option,value))
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return args
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def execute(self):
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args = self.__build_args()
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ipautil.run(["/usr/sbin/authconfig"]+args)
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def redhat_service(name):
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if name == 'sshd':
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return RedHatSSHService(name)
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return RedHatService(name)
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class RedHatServices(base.KnownServices):
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def __init__(self):
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services = dict()
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for s in base.wellknownservices:
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services[s] = redhat_service(s)
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# Call base class constructor. This will lock services to read-only
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super(RedHatServices, self).__init__(services)
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authconfig = RedHatAuthConfig
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service = redhat_service
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knownservices = RedHatServices()
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def restore_context(filepath, restorecon='/sbin/restorecon'):
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"""
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restore security context on the file path
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SELinux equivalent is /path/to/restorecon <filepath>
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restorecon's return values are not reliable so we have to
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ignore them (BZ #739604).
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ipautil.run() will do the logging.
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"""
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try:
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if (os.path.exists('/usr/sbin/selinuxenabled')):
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ipautil.run(["/usr/sbin/selinuxenabled"])
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else:
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# No selinuxenabled, no SELinux
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return
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except ipautil.CalledProcessError:
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# selinuxenabled returns 1 if not enabled
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return
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if (os.path.exists(restorecon)):
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ipautil.run([restorecon, filepath], raiseonerr=False)
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def backup_and_replace_hostname(fstore, statestore, hostname):
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old_hostname = socket.gethostname()
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try:
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ipautil.run(['/bin/hostname', hostname])
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except ipautil.CalledProcessError, e:
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print >>sys.stderr, "Failed to set this machine hostname to %s (%s)." % (hostname, str(e))
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replacevars = {'HOSTNAME':hostname}
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old_values = ipautil.backup_config_and_replace_variables(fstore,
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"/etc/sysconfig/network",
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replacevars=replacevars)
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restore_context("/etc/sysconfig/network")
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if 'HOSTNAME' in old_values:
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statestore.backup_state('network', 'hostname', old_values['HOSTNAME'])
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else:
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statestore.backup_state('network', 'hostname', old_hostname)
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def check_selinux_status(restorecon='/sbin/restorecon'):
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"""
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We don't have a specific package requirement for policycoreutils
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which provides restorecon. This is because we don't require
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SELinux on client installs. However if SELinux is enabled then
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this package is required.
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This function returns nothing but may raise a Runtime exception
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if SELinux is enabled but restorecon is not available.
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"""
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try:
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if (os.path.exists('/usr/sbin/selinuxenabled')):
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ipautil.run(["/usr/sbin/selinuxenabled"])
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else:
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# No selinuxenabled, no SELinux
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return
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except ipautil.CalledProcessError:
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# selinuxenabled returns 1 if not enabled
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return
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if not os.path.exists(restorecon):
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raise RuntimeError('SELinux is enabled but %s does not exist.\nInstall the policycoreutils package and start the installation again.' % restorecon)
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