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# Samba4 AD database checker
#
# Copyright (C) Andrew Tridgell 2011
#
# 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 optparse
import sys
import ldb
import samba.getopt as options
from samba import colour
from samba.auth import system_session
from samba.dbchecker import dbcheck
from samba.samdb import SamDB
from . import Command, CommandError, Option
class cmd_dbcheck(Command):
"""Check local AD database for errors."""
synopsis = "%prog [<DN>] [options]"
takes_optiongroups = {
"sambaopts": options.SambaOptions,
"versionopts": options.VersionOptions,
"credopts": options.CredentialsOptionsDouble,
}
def process_yes(option, opt, value, parser):
assert value is None
rargs = parser.rargs
if rargs:
arg = rargs[0]
if ((arg[:2] == "--" and len(arg) > 2) or
(arg[:1] == "-" and len(arg) > 1 and arg[1] != "-")):
setattr(parser.values, "yes", True)
else:
setattr(parser.values, "yes_rules", arg.split())
del rargs[0]
else:
setattr(parser.values, "yes", True)
takes_args = ["DN?"]
takes_options = [
Option("--scope", dest="scope", default="SUB",
help="Pass search scope that builds DN list. Options: SUB, ONE, BASE"),
Option("--fix", dest="fix", default=False, action='store_true',
help='Fix any errors found'),
Option("--yes", action='callback', callback=process_yes,
help="don't confirm changes individually. Applies all as a single transaction (will not succeed if any errors are found)"),
Option("--cross-ncs", dest="cross_ncs", default=False, action='store_true',
help="cross naming context boundaries"),
Option("-v", "--verbose", dest="verbose", action="store_true", default=False,
help="Print more details of checking"),
Option("-q", "--quiet", action="store_true", default=False,
help="don't print details of checking"),
Option("--attrs", dest="attrs", default=None, help="list of attributes to check (space separated)"),
Option("--reindex", dest="reindex", default=False, action="store_true", help="force database re-index"),
Option("--force-modules", dest="force_modules", default=False, action="store_true", help="force loading of Samba modules and ignore the @MODULES record (for very old databases)"),
Option("--reset-well-known-acls",
dest="reset_well_known_acls",
default=False, action="store_true",
help=("reset ACLs on objects with well known default values"
" (for updating from early 4.0.x)")),
Option("--quick-membership-checks", dest="quick_membership_checks",
help=("Skips missing/orphaned memberOf backlinks checks, "
"but speeds up dbcheck dramatically for domains with "
"large groups"),
default=False, action="store_true"),
Option("-H", "--URL", help="LDB URL for database or target server (defaults to local SAM database)",
type=str, metavar="URL", dest="H"),
Option("--selftest-check-expired-tombstones",
dest="selftest_check_expired_tombstones", default=False, action="store_true",
help=optparse.SUPPRESS_HELP), # This is only used by tests
]
def run(self, DN=None, H=None, verbose=False, fix=False, yes=False,
cross_ncs=False, quiet=False,
scope="SUB", credopts=None, sambaopts=None, versionopts=None,
attrs=None, reindex=False, force_modules=False,
quick_membership_checks=False,
reset_well_known_acls=False,
selftest_check_expired_tombstones=False,
yes_rules=None):
if yes_rules is None:
yes_rules = []
lp = sambaopts.get_loadparm()
over_ldap = H is not None and H.startswith('ldap')
if over_ldap:
creds = credopts.get_credentials(lp, fallback_machine=True)
else:
creds = None
if force_modules:
samdb = SamDB(session_info=system_session(), url=H,
credentials=creds, lp=lp, options=["modules=samba_dsdb"])
else:
try:
samdb = SamDB(session_info=system_session(), url=H,
credentials=creds, lp=lp)
except:
raise CommandError("Failed to connect to DB at %s. If this is a really old sam.ldb (before alpha9), then try again with --force-modules" % H)
if H is None or not over_ldap:
samdb_schema = samdb
else:
samdb_schema = SamDB(session_info=system_session(), url=None,
credentials=creds, lp=lp)
scope_map = {"SUB": ldb.SCOPE_SUBTREE, "BASE": ldb.SCOPE_BASE, "ONE": ldb.SCOPE_ONELEVEL}
scope = scope.upper()
if scope not in scope_map:
raise CommandError("Unknown scope %s" % scope)
search_scope = scope_map[scope]
controls = ['show_deleted:1']
if over_ldap:
controls.append('paged_results:1:1000')
if cross_ncs:
controls.append("search_options:1:2")
if not attrs:
attrs = ['*']
else:
attrs = attrs.split()
# The dbcheck module always prints to stdout, not our self.outf
# (yes, maybe FIXME).
stdout_colour = colour.colour_if_wanted(sys.stdout,
hint=self.requested_colour)
started_transaction = False
if yes and fix:
samdb.transaction_start()
started_transaction = True
try:
chk = dbcheck(samdb, samdb_schema=samdb_schema, verbose=verbose,
fix=fix, yes=yes, quiet=quiet,
in_transaction=started_transaction,
quick_membership_checks=quick_membership_checks,
reset_well_known_acls=reset_well_known_acls,
check_expired_tombstones=selftest_check_expired_tombstones,
colour=stdout_colour)
for option in yes_rules:
if hasattr(chk, option):
setattr(chk, option, 'ALL')
else:
raise CommandError("Invalid fix rule %s" % option)
if reindex:
self.outf.write("Re-indexing...\n")
error_count = 0
if chk.reindex_database():
self.outf.write("completed re-index OK\n")
elif force_modules:
self.outf.write("Resetting @MODULES...\n")
error_count = 0
if chk.reset_modules():
self.outf.write("completed @MODULES reset OK\n")
else:
error_count = chk.check_database(DN=DN, scope=search_scope,
controls=controls, attrs=attrs)
except:
if started_transaction:
samdb.transaction_cancel()
raise
if started_transaction:
samdb.transaction_commit()
if error_count != 0:
sys.exit(1)
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