source: branches/samba-3.3.x/source/lib/smbconf/smbconf_init.c

/*
 *  Unix SMB/CIFS implementation.
 *  libsmbconf - Samba configuration library, init dispatcher
 *  Copyright (C) Michael Adam 2008
 *
 *  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/>.
 */

#include "includes.h"
#include "lib/smbconf/smbconf_private.h"
#include "lib/smbconf/smbconf_txt.h"
#include "lib/smbconf/smbconf_reg.h"

/**
 * smbconf initialization dispatcher
 *
 * this takes a configuration source in the form of
 * backend:path and calles the appropriate backend
 * init function with the path argument
 *
 * known backends:
 * -  "registry" or "reg"
 * -  "txt" or "file"
 */
WERROR smbconf_init(TALLOC_CTX *mem_ctx, struct smbconf_ctx **conf_ctx,
                    const char *source)
{
        WERROR werr;
        char *backend = NULL;
        char *path = NULL;
        char *sep;
        TALLOC_CTX *tmp_ctx = talloc_stackframe();

        if (conf_ctx == NULL) {
                werr = WERR_INVALID_PARAM;
                goto done;
        }

        if ((source == NULL) || (*source == '\0')) {
                werr = WERR_INVALID_PARAM;
                goto done;
        }

        backend = talloc_strdup(tmp_ctx, source);
        if (backend == NULL) {
                werr = WERR_NOMEM;
                goto done;
        }

        sep = strchr(backend, ':');
        if (sep != NULL) {
                *sep = '\0';
                path = sep + 1;
                if (strlen(path) == 0) {
                        path = NULL;
                }
        }

        if (strequal(backend, "registry") || strequal(backend, "reg")) {
                werr = smbconf_init_reg(mem_ctx, conf_ctx, path);
        } else if (strequal(backend, "file") || strequal(backend, "txt")) {
                werr = smbconf_init_txt(mem_ctx, conf_ctx, path);
        } else if (sep == NULL) {
                /*
                 * If no separator was given in the source, and the string is
                 * not a known backend, assume file backend and use the source
                 * string as a path argument.
                 */
                werr = smbconf_init_txt(mem_ctx, conf_ctx, backend);
        } else {
                /*
                 * Separator was specified but this is not a known backend.
                 * As a last resort, try to interpret the original source
                 * string as a file name that contains a ":" sign.
                 * This may occur with an include directive like this:
                 * 'include = /path/to/file.%T'
                 */
                werr = smbconf_init_txt(mem_ctx, conf_ctx, source);
        }

done:
        talloc_free(tmp_ctx);
        return werr;
}