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#!/usr/bin/env python
#
# Unix SMB/CIFS implementation.
# provision a Samba4 server
# Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007-2008
# Copyright (C) Andrew Bartlett <abartlet@samba.org> 2008
#
# Based on the original in EJS:
# Copyright (C) Andrew Tridgell 2005
#   
# 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 logging
import optparse
import sys
import tempfile

# Find right directory when running from source tree
sys.path.insert(0, "bin/python")

import samba
import samba.ntacls
from samba.credentials import DONT_USE_KERBEROS
from samba.auth import system_session
import samba.getopt as options
from samba.provision import provision, FILL_FULL, FILL_NT4SYNC, FILL_DRS, ProvisioningError
from samba.dsdb import (
	DS_DOMAIN_FUNCTION_2000,
	DS_DOMAIN_FUNCTION_2003,
	DS_DOMAIN_FUNCTION_2008,
	DS_DOMAIN_FUNCTION_2008_R2,
	)

# how do we make this case insensitive??

parser = optparse.OptionParser("provision [options]")
sambaopts = options.SambaOptions(parser)
parser.add_option_group(sambaopts)
parser.add_option_group(options.VersionOptions(parser))
credopts = options.CredentialsOptions(parser)
parser.add_option_group(credopts)
parser.add_option("--interactive", help="Ask for names", action="store_true")
parser.add_option("--domain", type="string", metavar="DOMAIN",
				  help="set domain")
parser.add_option("--domain-guid", type="string", metavar="GUID", 
		help="set domainguid (otherwise random)")
parser.add_option("--domain-sid", type="string", metavar="SID", 
		help="set domainsid (otherwise random)")
parser.add_option("--ntds-guid", type="string", metavar="GUID", 
		  help="set NTDS object GUID (otherwise random)")
parser.add_option("--invocationid", type="string", metavar="GUID", 
		  help="set invocationid (otherwise random)")
parser.add_option("--host-name", type="string", metavar="HOSTNAME", 
		help="set hostname")
parser.add_option("--host-ip", type="string", metavar="IPADDRESS", 
		help="set IPv4 ipaddress")
parser.add_option("--host-ip6", type="string", metavar="IP6ADDRESS", 
		help="set IPv6 ipaddress")
parser.add_option("--adminpass", type="string", metavar="PASSWORD", 
		help="choose admin password (otherwise random)")
parser.add_option("--krbtgtpass", type="string", metavar="PASSWORD", 
		help="choose krbtgt password (otherwise random)")
parser.add_option("--machinepass", type="string", metavar="PASSWORD", 
		help="choose machine password (otherwise random)")
parser.add_option("--dnspass", type="string", metavar="PASSWORD", 
		help="choose dns password (otherwise random)")
parser.add_option("--ldapadminpass", type="string", metavar="PASSWORD", 
		help="choose password to set between Samba and it's LDAP backend (otherwise random)")
parser.add_option("--root", type="string", metavar="USERNAME", 
		help="choose 'root' unix username")
parser.add_option("--nobody", type="string", metavar="USERNAME", 
		help="choose 'nobody' user")
parser.add_option("--wheel", type="string", metavar="GROUPNAME", 
		help="choose 'wheel' privileged group")
parser.add_option("--users", type="string", metavar="GROUPNAME", 
		help="choose 'users' group")
parser.add_option("--quiet", help="Be quiet", action="store_true")
parser.add_option("--blank", action="store_true",
		help="do not add users or groups, just the structure")
parser.add_option("--ldap-backend-extra-port", type="int", metavar="LDAP-BACKEND-EXTRA-PORT", 
		help="Additional TCP port for LDAP backend server (to use for replication)")
parser.add_option("--ldap-backend-forced-uri", type="string", metavar="LDAP-BACKEND-FORCED-URI", 
		help="Force the LDAP backend connection to be to a particular URI.  Use this ONLY for 'existing' backends, or when debugging the interaction with the LDAP backend and you need to intercept the LDAP traffic")
parser.add_option("--ldap-backend-type", type="choice", metavar="LDAP-BACKEND-TYPE", 
		help="LDAP backend type (fedora-ds or openldap)",
		choices=["fedora-ds", "openldap"])
parser.add_option("--ldap-backend-nosync", help="Configure LDAP backend not to call fsync() (for performance in test environments)", action="store_true")
parser.add_option("--server-role", type="choice", metavar="ROLE",
		  choices=["domain controller", "dc", "member server", "member", "standalone"],
		help="The server role (domain controller | dc | member server | member | standalone). Default is standalone.")
parser.add_option("--function-level", type="choice", metavar="FOR-FUN-LEVEL",
		  choices=["2000", "2003", "2008", "2008_R2"],
		help="The domain and forest function level (2000 | 2003 | 2008 | 2008_R2 - always native). Default is (Windows) 2003 Native.")
parser.add_option("--next-rid", type="int", metavar="NEXTRID", default=1000,
		help="The initial nextRid value (only needed for upgrades).  Default is 1000.")
parser.add_option("--partitions-only", 
		help="Configure Samba's partitions, but do not modify them (ie, join a BDC)", action="store_true")
parser.add_option("--targetdir", type="string", metavar="DIR", 
		          help="Set target directory")
parser.add_option("--ol-mmr-urls", type="string", metavar="LDAPSERVER",
                help="List of LDAP-URLS [ ldap://<FQHN>:<PORT>/  (where <PORT> has to be different than 389!) ] separated with comma (\",\") for use with OpenLDAP-MMR (Multi-Master-Replication), e.g.: \"ldap://s4dc1:9000,ldap://s4dc2:9000\"")
parser.add_option("--slapd-path", type="string", metavar="SLAPD-PATH", 
		help="Path to slapd for LDAP backend [e.g.:'/usr/local/libexec/slapd']. Required for Setup with LDAP-Backend. OpenLDAP Version >= 2.4.17 should be used.") 
parser.add_option("--setup-ds-path", type="string", metavar="SETUP_DS-PATH", 
		help="Path to setup-ds.pl script for Fedora DS LDAP backend [e.g.:'/usr/sbin/setup-ds.pl']. Required for Setup with Fedora DS backend.") 
parser.add_option("--use-xattrs", type="choice", choices=["yes","no","auto"], help="Define if we should use the native fs capabilities or a tdb file for storing attributes likes ntacl, auto tries to make an inteligent guess based on the user rights and system capabilities", default="auto")
parser.add_option("--ldap-dryrun-mode", help="Configure LDAP backend, but do not run any binaries and exit early.  Used only for the test environment.  DO NOT USE", action="store_true")

opts = parser.parse_args()[0]

logger = logging.getLogger("provision")
logger.addHandler(logging.StreamHandler(sys.stdout))
if opts.quiet:
	logger.setLevel(logging.WARNING)
else:
	logger.setLevel(logging.INFO)

if len(sys.argv) == 1:
	opts.interactive = True

if opts.interactive:
	from getpass import getpass
	import socket
	def ask(prompt, default=None):
		if default is not None:
			print "%s [%s]: " % (prompt,default),
		else:
			print "%s: " % (prompt,),
		return sys.stdin.readline().rstrip("\n") or default
	try:
		default = socket.getfqdn().split(".", 1)[1].upper()
	except IndexError:
		default = None
	opts.realm = ask("Realm", default)
	if opts.realm in (None, ""):
		print >>sys.stderr, "No realm set!"
		sys.exit(1)

	try:
		default = opts.realm.split(".")[0]
	except IndexError:
		default = None
	opts.domain = ask("Domain", default)
	if opts.domain is None:
		print >> sys.stderr, "No domain set!"
		sys.exit(1)

	opts.server_role = ask("Server Role (dc, member, standalone)", "dc")
	for i in range(3):
		opts.adminpass = getpass("Administrator password: ")
		if not opts.adminpass:
			print >>sys.stderr, "Invalid administrator password."
		else:
			break
else:
	if opts.realm in (None, ""):
		opts.realm = sambaopts._lp.get('realm')
	if opts.realm is None or opts.domain is None:
		if opts.realm is None:
			print >>sys.stderr, "No realm set!"
		if opts.domain is None:
			print >> sys.stderr, "No domain set!"
		parser.print_usage()
		sys.exit(1)

if not opts.adminpass:
	logger.info("Administrator password will be set randomly!")

lp = sambaopts.get_loadparm()
smbconf = lp.configfile

if opts.server_role == "dc":
	server_role = "domain controller"
elif opts.server_role == "member":
	server_role = "member server"
else:
	server_role = opts.server_role

if opts.function_level is None:
	dom_for_fun_level = None
elif opts.function_level == "2000":
	dom_for_fun_level = DS_DOMAIN_FUNCTION_2000
elif opts.function_level == "2003":
	dom_for_fun_level = DS_DOMAIN_FUNCTION_2003
elif opts.function_level == "2008":
	dom_for_fun_level = DS_DOMAIN_FUNCTION_2008
elif opts.function_level == "2008_R2":
	dom_for_fun_level = DS_DOMAIN_FUNCTION_2008_R2

creds = credopts.get_credentials(lp)

creds.set_kerberos_state(DONT_USE_KERBEROS)

samdb_fill = FILL_FULL
if opts.blank:
    samdb_fill = FILL_NT4SYNC
elif opts.partitions_only:
    samdb_fill = FILL_DRS

eadb = True
if opts.use_xattrs == "yes":
	eadb = False
elif opts.use_xattrs == "auto" and not lp.get("posix:eadb"):
	file = tempfile.NamedTemporaryFile()
	try:
		samba.ntacls.setntacl(lp, file.name, 
			"O:S-1-5-32G:S-1-5-32", "S-1-5-32", "native")
		eadb = False
	except:
		logger.info("You are not root or your system do not support xattr, using tdb backend for attributes. "
			    "If you intend to use this provision in production, rerun the script as root on a system supporting xattrs.")
	file.close()


if opts.ldap_backend_type == "existing":
	if opts.ldap_backend_forced_uri is not None:
		logger.warn("You have specified to use an existing LDAP server as the backend, please make sure an LDAP server is running at %s" % opts.ldap_backend_forced_uri)
	else:
		logger.info("You have specified to use an existing LDAP server as the backend, please make sure an LDAP server is running at the default location")
else:
	if opts.ldap_backend_forced_uri is not None:
		logger.warn("You have specified to use an fixed URI %s for connecting to your LDAP server backend.  This is NOT RECOMMENDED, as our default communiation over ldapi:// is more secure and much less prone to unexpected failure or interaction" % opts.ldap_backend_forced_uri)
	
session = system_session()
try:
	provision(logger,
		  session, creds, smbconf=smbconf, targetdir=opts.targetdir,
		  samdb_fill=samdb_fill, realm=opts.realm, domain=opts.domain,
		  domainguid=opts.domain_guid, domainsid=opts.domain_sid,
		  hostname=opts.host_name,
		  hostip=opts.host_ip, hostip6=opts.host_ip6,
		  ntdsguid=opts.ntds_guid,
		  invocationid=opts.invocationid, adminpass=opts.adminpass,
		  krbtgtpass=opts.krbtgtpass, machinepass=opts.machinepass,
		  dnspass=opts.dnspass, root=opts.root, nobody=opts.nobody,
		  wheel=opts.wheel, users=opts.users,
		  serverrole=server_role, dom_for_fun_level=dom_for_fun_level,
		  ldap_backend_extra_port=opts.ldap_backend_extra_port,
		  ldap_backend_forced_uri=opts.ldap_backend_forced_uri,
		  backend_type=opts.ldap_backend_type,
		  ldapadminpass=opts.ldapadminpass, ol_mmr_urls=opts.ol_mmr_urls,
		  slapd_path=opts.slapd_path, setup_ds_path=opts.setup_ds_path,
		  nosync=opts.ldap_backend_nosync, ldap_dryrun_mode=opts.ldap_dryrun_mode, 
		  useeadb=eadb, next_rid=opts.next_rid, lp=lp)
except ProvisioningError, e:
	print str(e)
	sys.exit(1)