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# Authors: Simo Sorce <ssorce@redhat.com>
# Alexander Bokovoy <abokovoy@redhat.com>
#
# Copyright (C) 2007-2011 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/>.
#
import tempfile
import re
import os
import stat
import sys
from ipapython import ipautil
from ipapython.platform import base
# All what we allow exporting directly from this module
# Everything else is made available through these symbols when they directly imported into ipapython.services:
# authconfig -- class reference for platform-specific implementation of authconfig(8)
# service -- class reference for platform-specific implementation of a PlatformService class
# knownservices -- factory instance to access named services IPA cares about, names are ipapython.services.wellknownservices
# backup_and_replace_hostname -- platform-specific way to set hostname and make it persistent over reboots
# restore_context -- platform-sepcific way to restore security context, if applicable
__all__ = ['authconfig', 'service', 'knownservices', 'backup_and_replace_hostname', 'restore_context']
class RedHatService(base.PlatformService):
def stop(self, instance_name="", capture_output=True):
ipautil.run(["/sbin/service", self.service_name, "stop", instance_name], capture_output=capture_output)
def start(self, instance_name="", capture_output=True):
ipautil.run(["/sbin/service", self.service_name, "start", instance_name], capture_output=capture_output)
def restart(self, instance_name="", capture_output=True):
ipautil.run(["/sbin/service", self.service_name, "restart", instance_name], capture_output=capture_output)
def is_running(self, instance_name=""):
ret = True
try:
(sout,serr,rcode) = ipautil.run(["/sbin/service", self.service_name, "status", instance_name])
if sout.find("is stopped") >= 0:
ret = False
except ipautil.CalledProcessError:
ret = False
return ret
def is_installed(self):
installed = True
try:
ipautil.run(["/sbin/service", self.service_name, "status"])
except ipautil.CalledProcessError, e:
if e.returncode == 1:
# service is not installed or there is other serious issue
installed = False
return installed
def is_enabled(self):
(stdout, stderr, returncode) = ipautil.run(["/sbin/chkconfig", self.service_name],raiseonerr=False)
return (returncode == 0)
def enable(self):
ipautil.run(["/sbin/chkconfig", self.service_name, "on"])
def disable(self):
ipautil.run(["/sbin/chkconfig", self.service_name, "off"])
def install(self):
ipautil.run(["/sbin/chkconfig", "--add", self.service_name])
def remove(self):
ipautil.run(["/sbin/chkconfig", "--del", self.service_name])
class RedHatAuthConfig(base.AuthConfig):
"""
AuthConfig class implements system-independent interface to configure
system authentication resources. In Red Hat-produced systems this is done with
authconfig(8) utility.
"""
def __build_args(self):
args = []
for (option, value) in self.parameters.items():
if type(value) is bool:
if value:
args.append("--enable%s" % (option))
else:
args.append("--disable%s" % (option))
elif type(value) in (tuple, list):
args.append("--%s" % (option))
args.append("%s" % (value[0]))
elif value is None:
args.append("--%s" % (option))
else:
args.append("--%s%s" % (option,value))
return args
def execute(self):
args = self.__build_args()
ipautil.run(["/usr/sbin/authconfig"]+args)
class RedHatServices(base.KnownServices):
def __init__(self):
services = dict()
for s in base.wellknownservices:
services[s] = RedHatService(s)
# Call base class constructor. This will lock services to read-only
super(RedHatServices, self).__init__(services)
authconfig = RedHatAuthConfig
service = RedHatService
knownservices = RedHatServices()
def restore_context(filepath):
"""
restore security context on the file path
SELinux equivalent is /sbin/restorecon <filepath>
restorecon's return values are not reliable so we have to
ignore them (BZ #739604).
ipautil.run() will do the logging.
"""
ipautil.run(["/sbin/restorecon", filepath], raiseonerr=False)
def backup_and_replace_hostname(fstore, statestore, hostname):
network_filename = "/etc/sysconfig/network"
# Backup original /etc/sysconfig/network
fstore.backup_file(network_filename)
hostname_pattern = re.compile('''
(^
\s*
(?P<option> [^\#;]+?)
(\s*=\s*)
(?P<value> .+?)?
(\s*((\#|;).*)?)?
$)''', re.VERBOSE)
temp_filename = None
with tempfile.NamedTemporaryFile(delete=False) as new_config:
temp_filename = new_config.name
with open(network_filename, 'r') as f:
for line in f:
new_line = line
m = hostname_pattern.match(line)
if m:
option, value = m.group('option', 'value')
if option is not None and option == 'HOSTNAME':
if value is not None and hostname != value:
new_line = u"HOSTNAME=%s\n" % (hostname)
statestore.backup_state('network', 'hostname', value)
new_config.write(new_line)
new_config.flush()
# Make sure the resulting file is readable by others before installing it
os.fchmod(new_config.fileno(), stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IROTH)
os.fchown(new_config.fileno(), 0, 0)
# At this point new_config is closed but not removed due to 'delete=False' above
# Now, install the temporary file as configuration and ensure old version is available as .orig
# While .orig file is not used during uninstall, it is left there for administrator.
ipautil.install_file(temp_filename, network_filename)
try:
ipautil.run(['/bin/hostname', hostname])
except ipautil.CalledProcessError, e:
print >>sys.stderr, "Failed to set this machine hostname to %s (%s)." % (hostname, str(e))
# For SE Linux environments it is important to reset SE labels to the expected ones
try:
restore_context(network_filename)
except ipautil.CalledProcessError, e:
print >>sys.stderr, "Failed to set permissions for %s (%s)." % (network_filename, str(e))
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