source: vendor/current/lib/ldb-samba/samba_extensions.c

/*
   ldb database library - samba extensions

   Copyright (C) Andrew Tridgell  2010

     ** NOTE! The following LGPL license applies to the ldb
     ** library. This does NOT imply that all of Samba is released
     ** under the LGPL

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 3 of the License, or (at your option) any later version.

   This library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/


#include "includes.h"
#include "ldb_module.h"
#include "lib/cmdline/popt_common.h"
#include "auth/gensec/gensec.h"
#include "auth/auth.h"
#include "param/param.h"
#include "dsdb/samdb/samdb.h"
#include "ldb_wrap.h"
#include "popt.h"



/*
  work out the length of a popt array
 */
static unsigned calculate_popt_array_length(struct poptOption *opts)
{
        unsigned i;
        struct poptOption zero_opt = { NULL };
        for (i=0; memcmp(&zero_opt, &opts[i], sizeof(zero_opt)) != 0; i++) ;
        return i;
}

static struct poptOption cmdline_extensions[] = {
        POPT_COMMON_SAMBA
        POPT_COMMON_CREDENTIALS
        POPT_COMMON_CONNECTION
        POPT_COMMON_VERSION
        { NULL }
};

/*
  called to register additional command line options
 */
static int extensions_hook(struct ldb_context *ldb, enum ldb_module_hook_type t)
{
        switch (t) {
        case LDB_MODULE_HOOK_CMDLINE_OPTIONS: {
                unsigned len1, len2;
                struct poptOption **popt_options = ldb_module_popt_options(ldb);
                struct poptOption *new_array;

                len1 = calculate_popt_array_length(*popt_options);
                len2 = calculate_popt_array_length(cmdline_extensions);
                new_array = talloc_array(NULL, struct poptOption, len1+len2+1);
                if (NULL == new_array) {
                        return ldb_oom(ldb);
                }

                memcpy(new_array, *popt_options, len1*sizeof(struct poptOption));
                memcpy(new_array+len1, cmdline_extensions, (1+len2)*sizeof(struct poptOption));
                (*popt_options) = new_array;
                return LDB_SUCCESS;
        }

        case LDB_MODULE_HOOK_CMDLINE_PRECONNECT: {
                int r = ldb_register_samba_handlers(ldb);
                if (r != LDB_SUCCESS) {
                        return ldb_operr(ldb);
                }
                gensec_init();

                if (ldb_set_opaque(ldb, "sessionInfo", system_session(cmdline_lp_ctx))) {
                        return ldb_operr(ldb);
                }
                if (ldb_set_opaque(ldb, "credentials", cmdline_credentials)) {
                        return ldb_operr(ldb);
                }
                if (ldb_set_opaque(ldb, "loadparm", cmdline_lp_ctx)) {
                        return ldb_operr(ldb);
                }

                ldb_set_utf8_fns(ldb, NULL, wrap_casefold);
                break;
        }

        case LDB_MODULE_HOOK_CMDLINE_POSTCONNECT:
                /* get the domain SID into the cache for SDDL processing */
                samdb_domain_sid(ldb);
                break;
        }

        return LDB_SUCCESS;
}


/*
  initialise the module
 */
_PUBLIC_ int ldb_samba_extensions_init(const char *ldb_version)
{
        ldb_register_hook(extensions_hook);

        return LDB_SUCCESS;
}