def init(self):
        from samba.provision import ProvisioningError
        # we will shortly start slapd with ldapi for final provisioning. first
        # check with ldapsearch -> rootDSE via self.ldap_uri if another
        # instance of slapd is already running
        try:
            ldapi_db = Ldb(self.ldap_uri)
            ldapi_db.search(base="", scope=SCOPE_BASE,
                expression="(objectClass=OpenLDAProotDSE)")
            try:
                f = open(self.slapd_pid, "r")
            except IOError, err:
                if err != errno.ENOENT:
                    raise
            else:
                try:
                    p = f.read()
                finally:
                    f.close()
                self.logger.info("Check for slapd process with PID: %s and terminate it manually." % p)
            raise SlapdAlreadyRunning(self.ldap_uri)
        except LdbError:
            # XXX: We should never be catching all Ldb errors
            pass

        # Try to print helpful messages when the user has not specified the
        # path to slapd
        if self.slapd_path is None:
            raise ProvisioningError("Warning: LDAP-Backend must be setup with path to slapd, e.g. --slapd-path=\"/usr/local/libexec/slapd\"!")
        if not os.path.exists(self.slapd_path):
            self.logger.warning("Path (%s) to slapd does not exist!",
                self.slapd_path)

        if not os.path.isdir(self.ldapdir):
            os.makedirs(self.ldapdir, 0700)

        # Put the LDIF of the schema into a database so we can search on
        # it to generate schema-dependent configurations in Fedora DS and
        # OpenLDAP
        schemadb_path = os.path.join(self.ldapdir, "schema-tmp.ldb")
        try:
            os.unlink(schemadb_path)
        except __HOLE__:
            pass

        self.schema.write_to_tmp_ldb(schemadb_path)

        self.credentials = Credentials()
        self.credentials.guess(self.lp)
        # Kerberos to an ldapi:// backend makes no sense
        self.credentials.set_kerberos_state(DONT_USE_KERBEROS)
        self.credentials.set_password(self.ldapadminpass)

        self.secrets_credentials = Credentials()
        self.secrets_credentials.guess(self.lp)
        # Kerberos to an ldapi:// backend makes no sense
        self.secrets_credentials.set_kerberos_state(DONT_USE_KERBEROS)
        self.secrets_credentials.set_username("samba-admin")
        self.secrets_credentials.set_password(self.ldapadminpass)

        self.provision()
dataset/ETHPy150Open byt3bl33d3r/pth-toolkit/lib/python2.7/site-packages/samba/provision/backend.py/LDAPBackend.init