libsmbconf: move the non-registry parts of libsmbconf to top level

Michael

6 files changed, 1428 insertions, 0 deletions

diff --git a/lib/smbconf/smbconf.c b/lib/smbconf/smbconf.c
new file mode 100644
index 0000000000..d723f0b140
--- /dev/null
+++ b/lib/smbconf/smbconf.c
@@ -0,0 +1,405 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  libsmbconf - Samba configuration library
+ *  Copyright (C) Michael Adam 2007-2008
+ *  Copyright (C) Guenther Deschner 2007
+ *
+ *  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 "smbconf_private.h"
+
+/**********************************************************************
+ *
+ * internal helper functions
+ *
+ **********************************************************************/
+
+static WERROR smbconf_global_check(struct smbconf_ctx *ctx)
+{
+	if (!smbconf_share_exists(ctx, GLOBAL_NAME)) {
+		return smbconf_create_share(ctx, GLOBAL_NAME);
+	}
+	return WERR_OK;
+}
+
+
+/**********************************************************************
+ *
+ * The actual libsmbconf API functions that are exported.
+ *
+ **********************************************************************/
+
+/**
+ * Tell whether the backend requires messaging to be set up
+ * for the backend to work correctly.
+ */
+bool smbconf_backend_requires_messaging(struct smbconf_ctx *ctx)
+{
+	return ctx->ops->requires_messaging(ctx);
+}
+
+/**
+ * Tell whether the source is writeable.
+ */
+bool smbconf_is_writeable(struct smbconf_ctx *ctx)
+{
+	return ctx->ops->is_writeable(ctx);
+}
+
+/**
+ * Close the configuration.
+ */
+void smbconf_shutdown(struct smbconf_ctx *ctx)
+{
+	talloc_free(ctx);
+}
+
+/**
+ * Detect changes in the configuration.
+ * The given csn struct is filled with the current csn.
+ * smbconf_changed() can also be used for initial retrieval
+ * of the csn.
+ */
+bool smbconf_changed(struct smbconf_ctx *ctx, struct smbconf_csn *csn,
+		     const char *service, const char *param)
+{
+	struct smbconf_csn old_csn;
+
+	if (csn == NULL) {
+		return false;
+	}
+
+	old_csn = *csn;
+
+	ctx->ops->get_csn(ctx, csn, service, param);
+	return (csn->csn != old_csn.csn);
+}
+
+/**
+ * Drop the whole configuration (restarting empty).
+ */
+WERROR smbconf_drop(struct smbconf_ctx *ctx)
+{
+	return ctx->ops->drop(ctx);
+}
+
+/**
+ * Get the whole configuration as lists of strings with counts:
+ *
+ *  num_shares   : number of shares
+ *  share_names  : list of length num_shares of share names
+ *  num_params   : list of length num_shares of parameter counts for each share
+ *  param_names  : list of lists of parameter names for each share
+ *  param_values : list of lists of parameter values for each share
+ */
+WERROR smbconf_get_config(struct smbconf_ctx *ctx,
+			  TALLOC_CTX *mem_ctx,
+			  uint32_t *num_shares,
+			  struct smbconf_service ***services)
+{
+	WERROR werr = WERR_OK;
+	TALLOC_CTX *tmp_ctx = NULL;
+	uint32_t tmp_num_shares;
+	char **tmp_share_names;
+	struct smbconf_service **tmp_services;
+	uint32_t count;
+
+	if ((num_shares == NULL) || (services == NULL)) {
+		werr = WERR_INVALID_PARAM;
+		goto done;
+	}
+
+	tmp_ctx = talloc_stackframe();
+
+	werr = smbconf_get_share_names(ctx, tmp_ctx, &tmp_num_shares,
+				       &tmp_share_names);
+	if (!W_ERROR_IS_OK(werr)) {
+		goto done;
+	}
+
+	tmp_services = TALLOC_ARRAY(tmp_ctx, struct smbconf_service *,
+				    tmp_num_shares);
+
+	if (tmp_services == NULL) {
+		werr = WERR_NOMEM;
+		goto done;
+	}
+
+	for (count = 0; count < tmp_num_shares; count++) {
+		werr = smbconf_get_share(ctx, tmp_services,
+					 tmp_share_names[count],
+					 &tmp_services[count]);
+		if (!W_ERROR_IS_OK(werr)) {
+			goto done;
+		}
+	}
+
+	werr = WERR_OK;
+
+	*num_shares = tmp_num_shares;
+	if (tmp_num_shares > 0) {
+		*services = talloc_move(mem_ctx, &tmp_services);
+	} else {
+		*services = NULL;
+	}
+
+done:
+	talloc_free(tmp_ctx);
+	return werr;
+}
+
+/**
+ * get the list of share names defined in the configuration.
+ */
+WERROR smbconf_get_share_names(struct smbconf_ctx *ctx,
+			       TALLOC_CTX *mem_ctx,
+			       uint32_t *num_shares,
+			       char ***share_names)
+{
+	return ctx->ops->get_share_names(ctx, mem_ctx, num_shares,
+					 share_names);
+}
+
+/**
+ * check if a share/service of a given name exists
+ */
+bool smbconf_share_exists(struct smbconf_ctx *ctx,
+			  const char *servicename)
+{
+	return ctx->ops->share_exists(ctx, servicename);
+}
+
+/**
+ * Add a service if it does not already exist.
+ */
+WERROR smbconf_create_share(struct smbconf_ctx *ctx,
+			    const char *servicename)
+{
+	if ((servicename != NULL) && smbconf_share_exists(ctx, servicename)) {
+		return WERR_FILE_EXISTS;
+	}
+
+	return ctx->ops->create_share(ctx, servicename);
+}
+
+/**
+ * get a definition of a share (service) from configuration.
+ */
+WERROR smbconf_get_share(struct smbconf_ctx *ctx,
+			 TALLOC_CTX *mem_ctx,
+			 const char *servicename,
+			 struct smbconf_service **service)
+{
+	if (!smbconf_share_exists(ctx, servicename)) {
+		return WERR_NO_SUCH_SERVICE;
+	}
+
+	return ctx->ops->get_share(ctx, mem_ctx, servicename, service);
+}
+
+/**
+ * delete a service from configuration
+ */
+WERROR smbconf_delete_share(struct smbconf_ctx *ctx, const char *servicename)
+{
+	if (!smbconf_share_exists(ctx, servicename)) {
+		return WERR_NO_SUCH_SERVICE;
+	}
+
+	return ctx->ops->delete_share(ctx, servicename);
+}
+
+/**
+ * set a configuration parameter to the value provided.
+ */
+WERROR smbconf_set_parameter(struct smbconf_ctx *ctx,
+			     const char *service,
+			     const char *param,
+			     const char *valstr)
+{
+	if (!smbconf_share_exists(ctx, service)) {
+		return WERR_NO_SUCH_SERVICE;
+	}
+
+	return ctx->ops->set_parameter(ctx, service, param, valstr);
+}
+
+/**
+ * Set a global parameter
+ * (i.e. a parameter in the [global] service).
+ *
+ * This also creates [global] when it does not exist.
+ */
+WERROR smbconf_set_global_parameter(struct smbconf_ctx *ctx,
+				    const char *param, const char *val)
+{
+	WERROR werr;
+
+	werr = smbconf_global_check(ctx);
+	if (W_ERROR_IS_OK(werr)) {
+		werr = smbconf_set_parameter(ctx, GLOBAL_NAME, param, val);
+	}
+
+	return werr;
+}
+
+/**
+ * get the value of a configuration parameter as a string
+ */
+WERROR smbconf_get_parameter(struct smbconf_ctx *ctx,
+			     TALLOC_CTX *mem_ctx,
+			     const char *service,
+			     const char *param,
+			     char **valstr)
+{
+	if (valstr == NULL) {
+		return WERR_INVALID_PARAM;
+	}
+
+	if (!smbconf_share_exists(ctx, service)) {
+		return WERR_NO_SUCH_SERVICE;
+	}
+
+	return ctx->ops->get_parameter(ctx, mem_ctx, service, param, valstr);
+}
+
+/**
+ * Get the value of a global parameter.
+ *
+ * Create [global] if it does not exist.
+ */
+WERROR smbconf_get_global_parameter(struct smbconf_ctx *ctx,
+				    TALLOC_CTX *mem_ctx,
+				    const char *param,
+				    char **valstr)
+{
+	WERROR werr;
+
+	werr = smbconf_global_check(ctx);
+	if (W_ERROR_IS_OK(werr)) {
+		werr = smbconf_get_parameter(ctx, mem_ctx, GLOBAL_NAME, param,
+					     valstr);
+	}
+
+	return werr;
+}
+
+/**
+ * delete a parameter from configuration
+ */
+WERROR smbconf_delete_parameter(struct smbconf_ctx *ctx,
+				const char *service, const char *param)
+{
+	if (!smbconf_share_exists(ctx, service)) {
+		return WERR_NO_SUCH_SERVICE;
+	}
+
+	return ctx->ops->delete_parameter(ctx, service, param);
+}
+
+/**
+ * Delete a global parameter.
+ *
+ * Create [global] if it does not exist.
+ */
+WERROR smbconf_delete_global_parameter(struct smbconf_ctx *ctx,
+				       const char *param)
+{
+	WERROR werr;
+
+	werr = smbconf_global_check(ctx);
+	if (W_ERROR_IS_OK(werr)) {
+		werr = smbconf_delete_parameter(ctx, GLOBAL_NAME, param);
+	}
+
+	return werr;
+}
+
+WERROR smbconf_get_includes(struct smbconf_ctx *ctx,
+			    TALLOC_CTX *mem_ctx,
+			    const char *service,
+			    uint32_t *num_includes, char ***includes)
+{
+	if (!smbconf_share_exists(ctx, service)) {
+		return WERR_NO_SUCH_SERVICE;
+	}
+
+	return ctx->ops->get_includes(ctx, mem_ctx, service, num_includes,
+				      includes);
+}
+
+WERROR smbconf_get_global_includes(struct smbconf_ctx *ctx,
+				   TALLOC_CTX *mem_ctx,
+				   uint32_t *num_includes, char ***includes)
+{
+	WERROR werr;
+
+	werr = smbconf_global_check(ctx);
+	if (W_ERROR_IS_OK(werr)) {
+		werr = smbconf_get_includes(ctx, mem_ctx, GLOBAL_NAME,
+					    num_includes, includes);
+	}
+
+	return werr;
+}
+
+WERROR smbconf_set_includes(struct smbconf_ctx *ctx,
+			    const char *service,
+			    uint32_t num_includes, const char **includes)
+{
+	if (!smbconf_share_exists(ctx, service)) {
+		return WERR_NO_SUCH_SERVICE;
+	}
+
+	return ctx->ops->set_includes(ctx, service, num_includes, includes);
+}
+
+WERROR smbconf_set_global_includes(struct smbconf_ctx *ctx,
+				   uint32_t num_includes,
+				   const char **includes)
+{
+	WERROR werr;
+
+	werr = smbconf_global_check(ctx);
+	if (W_ERROR_IS_OK(werr)) {
+		werr = smbconf_set_includes(ctx, GLOBAL_NAME,
+					    num_includes, includes);
+	}
+
+	return werr;
+}
+
+
+WERROR smbconf_delete_includes(struct smbconf_ctx *ctx, const char *service)
+{
+	if (!smbconf_share_exists(ctx, service)) {
+		return WERR_NO_SUCH_SERVICE;
+	}
+
+	return ctx->ops->delete_includes(ctx, service);
+}
+
+WERROR smbconf_delete_global_includes(struct smbconf_ctx *ctx)
+{
+	WERROR werr;
+
+	werr = smbconf_global_check(ctx);
+	if (W_ERROR_IS_OK(werr)) {
+		werr = smbconf_delete_includes(ctx, GLOBAL_NAME);
+	}
+
+	return werr;
+}
diff --git a/lib/smbconf/smbconf.h b/lib/smbconf/smbconf.h
new file mode 100644
index 0000000000..106fae6431
--- /dev/null
+++ b/lib/smbconf/smbconf.h
@@ -0,0 +1,97 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  libsmbconf - Samba configuration library
+ *  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/>.
+ */
+
+#ifndef __LIBSMBCONF_H__
+#define __LIBSMBCONF_H__
+
+struct smbconf_ctx;
+
+/* the change sequence number */
+struct smbconf_csn {
+	uint64_t csn;
+};
+
+struct smbconf_service {
+	char *name;
+	uint32_t num_params;
+	char **param_names;
+	char **param_values;
+};
+
+/*
+ * the smbconf API functions
+ */
+bool smbconf_backend_requires_messaging(struct smbconf_ctx *ctx);
+bool smbconf_is_writeable(struct smbconf_ctx *ctx);
+void smbconf_shutdown(struct smbconf_ctx *ctx);
+bool smbconf_changed(struct smbconf_ctx *ctx, struct smbconf_csn *csn,
+		     const char *service, const char *param);
+WERROR smbconf_drop(struct smbconf_ctx *ctx);
+WERROR smbconf_get_config(struct smbconf_ctx *ctx,
+			  TALLOC_CTX *mem_ctx,
+			  uint32_t *num_shares,
+			  struct smbconf_service ***services);
+WERROR smbconf_get_share_names(struct smbconf_ctx *ctx,
+			       TALLOC_CTX *mem_ctx,
+			       uint32_t *num_shares,
+			       char ***share_names);
+bool smbconf_share_exists(struct smbconf_ctx *ctx, const char *servicename);
+WERROR smbconf_create_share(struct smbconf_ctx *ctx, const char *servicename);
+WERROR smbconf_get_share(struct smbconf_ctx *ctx,
+			 TALLOC_CTX *mem_ctx,
+			 const char *servicename,
+			 struct smbconf_service **service);
+WERROR smbconf_delete_share(struct smbconf_ctx *ctx,
+			    const char *servicename);
+WERROR smbconf_set_parameter(struct smbconf_ctx *ctx,
+			     const char *service,
+			     const char *param,
+			     const char *valstr);
+WERROR smbconf_set_global_parameter(struct smbconf_ctx *ctx,
+				    const char *param, const char *val);
+WERROR smbconf_get_parameter(struct smbconf_ctx *ctx,
+			     TALLOC_CTX *mem_ctx,
+			     const char *service,
+			     const char *param,
+			     char **valstr);
+WERROR smbconf_get_global_parameter(struct smbconf_ctx *ctx,
+				    TALLOC_CTX *mem_ctx,
+				    const char *param,
+				    char **valstr);
+WERROR smbconf_delete_parameter(struct smbconf_ctx *ctx,
+				const char *service, const char *param);
+WERROR smbconf_delete_global_parameter(struct smbconf_ctx *ctx,
+				       const char *param);
+WERROR smbconf_get_includes(struct smbconf_ctx *ctx,
+			    TALLOC_CTX *mem_ctx,
+			    const char *service,
+			    uint32_t *num_includes, char ***includes);
+WERROR smbconf_get_global_includes(struct smbconf_ctx *ctx,
+				   TALLOC_CTX *mem_ctx,
+				   uint32_t *num_includes, char ***includes);
+WERROR smbconf_set_includes(struct smbconf_ctx *ctx,
+			    const char *service,
+			    uint32_t num_includes, const char **includes);
+WERROR smbconf_set_global_includes(struct smbconf_ctx *ctx,
+				   uint32_t num_includes,
+				   const char **includes);
+WERROR smbconf_delete_includes(struct smbconf_ctx *ctx, const char *service);
+WERROR smbconf_delete_global_includes(struct smbconf_ctx *ctx);
+
+#endif /*  _LIBSMBCONF_H_  */
diff --git a/lib/smbconf/smbconf_private.h b/lib/smbconf/smbconf_private.h
new file mode 100644
index 0000000000..b0333e981a
--- /dev/null
+++ b/lib/smbconf/smbconf_private.h
@@ -0,0 +1,87 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  libsmbconf - Samba configuration library
+ *  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/>.
+ */
+
+#ifndef __LIBSMBCONF_PRIVATE_H__
+#define __LIBSMBCONF_PRIVATE_H__
+
+struct smbconf_ops {
+	WERROR (*init)(struct smbconf_ctx *ctx, const char *path);
+	int (*shutdown)(struct smbconf_ctx *ctx);
+	bool (*requires_messaging)(struct smbconf_ctx *ctx);
+	bool (*is_writeable)(struct smbconf_ctx *ctx);
+	WERROR (*open_conf)(struct smbconf_ctx *ctx);
+	int (*close_conf)(struct smbconf_ctx *ctx);
+	void (*get_csn)(struct smbconf_ctx *ctx, struct smbconf_csn *csn,
+			const char *service, const char *param);
+	WERROR (*drop)(struct smbconf_ctx *ctx);
+	WERROR (*get_share_names)(struct smbconf_ctx *ctx,
+				  TALLOC_CTX *mem_ctx,
+				  uint32_t *num_shares,
+				  char ***share_names);
+	bool (*share_exists)(struct smbconf_ctx *ctx, const char *service);
+	WERROR (*create_share)(struct smbconf_ctx *ctx, const char *service);
+	WERROR (*get_share)(struct smbconf_ctx *ctx,
+			    TALLOC_CTX *mem_ctx,
+			    const char *servicename,
+			    struct smbconf_service **service);
+	WERROR (*delete_share)(struct smbconf_ctx *ctx,
+				    const char *servicename);
+	WERROR (*set_parameter)(struct smbconf_ctx *ctx,
+				const char *service,
+				const char *param,
+				const char *valstr);
+	WERROR (*get_parameter)(struct smbconf_ctx *ctx,
+				TALLOC_CTX *mem_ctx,
+				const char *service,
+				const char *param,
+				char **valstr);
+	WERROR (*delete_parameter)(struct smbconf_ctx *ctx,
+				   const char *service, const char *param);
+	WERROR (*get_includes)(struct smbconf_ctx *ctx,
+			       TALLOC_CTX *mem_ctx,
+			       const char *service,
+			       uint32_t *num_includes, char ***includes);
+	WERROR (*set_includes)(struct smbconf_ctx *ctx,
+			       const char *service,
+			       uint32_t num_includes, const char **includes);
+	WERROR (*delete_includes)(struct smbconf_ctx *ctx,
+				  const char *service);
+};
+
+struct smbconf_ctx {
+	const char *path;
+	struct smbconf_ops *ops;
+	void *data; /* private data for use in backends */
+};
+
+WERROR smbconf_init_internal(TALLOC_CTX *mem_ctx, struct smbconf_ctx **conf_ctx,
+			     const char *path, struct smbconf_ops *ops);
+
+WERROR smbconf_add_string_to_array(TALLOC_CTX *mem_ctx,
+				   char ***array,
+				   uint32_t count,
+				   const char *string);
+
+bool smbconf_find_in_array(const char *string, char **list,
+			   uint32_t num_entries, uint32_t *entry);
+
+bool smbconf_reverse_find_in_array(const char *string, char **list,
+				   uint32_t num_entries, uint32_t *entry);
+
+#endif
diff --git a/lib/smbconf/smbconf_txt.c b/lib/smbconf/smbconf_txt.c
new file mode 100644
index 0000000000..c4d2d2b1af
--- /dev/null
+++ b/lib/smbconf/smbconf_txt.c
@@ -0,0 +1,655 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  libsmbconf - Samba configuration library, text backend
+ *  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/>.
+ */
+
+/*
+ * This is a sample implementation of a libsmbconf text backend
+ * using the params.c parser.
+ *
+ * It is read only.
+ * Don't expect brilliant performance, since it is not hashing the lists.
+ */
+
+#include "includes.h"
+#include "smbconf_private.h"
+
+struct txt_cache {
+	uint32_t current_share;
+	uint32_t num_shares;
+	char **share_names;
+	uint32_t *num_params;
+	char ***param_names;
+	char ***param_values;
+};
+
+struct txt_private_data {
+	struct txt_cache *cache;
+	uint64_t csn;
+	bool verbatim;
+};
+
+/**********************************************************************
+ *
+ * helper functions
+ *
+ **********************************************************************/
+
+/**
+ * a convenience helper to cast the private data structure
+ */
+static struct txt_private_data *pd(struct smbconf_ctx *ctx)
+{
+	return (struct txt_private_data *)(ctx->data);
+}
+
+static bool smbconf_txt_do_section(const char *section, void *private_data)
+{
+	WERROR werr;
+	uint32_t idx;
+	struct txt_private_data *tpd = (struct txt_private_data *)private_data;
+	struct txt_cache *cache = tpd->cache;
+
+	if (smbconf_find_in_array(section, cache->share_names,
+				  cache->num_shares, &idx))
+	{
+		cache->current_share = idx;
+		return true;
+	}
+
+	werr = smbconf_add_string_to_array(cache, &(cache->share_names),
+					   cache->num_shares, section);
+	if (!W_ERROR_IS_OK(werr)) {
+		return false;
+	}
+	cache->current_share = cache->num_shares;
+	cache->num_shares++;
+
+	cache->param_names = TALLOC_REALLOC_ARRAY(cache,
+						  cache->param_names,
+						  char **,
+						  cache->num_shares);
+	if (cache->param_names == NULL) {
+		return false;
+	}
+	cache->param_names[cache->current_share] = NULL;
+
+	cache->param_values = TALLOC_REALLOC_ARRAY(cache,
+						   cache->param_values,
+						   char **,
+						   cache->num_shares);
+	if (cache->param_values == NULL) {
+		return false;
+	}
+	cache->param_values[cache->current_share] = NULL;
+
+	cache->num_params = TALLOC_REALLOC_ARRAY(cache,
+						 cache->num_params,
+						 uint32_t,
+						 cache->num_shares);
+	if (cache->num_params == NULL) {
+		return false;
+	}
+	cache->num_params[cache->current_share] = 0;
+
+	return true;
+}
+
+static bool smbconf_txt_do_parameter(const char *param_name,
+				     const char *param_value,
+				     void *private_data)
+{
+	WERROR werr;
+	char **param_names, **param_values;
+	uint32_t num_params;
+	uint32_t idx;
+	struct txt_private_data *tpd = (struct txt_private_data *)private_data;
+	struct txt_cache *cache = tpd->cache;
+
+	if (cache->num_shares == 0) {
+		/*
+		 * not in any share yet,
+		 * initialize the "empty" section (NULL):
+		 * parameters without a previous [section] are stored here.
+		 */
+		if (!smbconf_txt_do_section(NULL, private_data)) {
+			return false;
+		}
+	}
+
+	param_names  = cache->param_names[cache->current_share];
+	param_values = cache->param_values[cache->current_share];
+	num_params   = cache->num_params[cache->current_share];
+
+	if (!(tpd->verbatim) &&
+	    smbconf_find_in_array(param_name, param_names, num_params, &idx))
+	{
+		talloc_free(param_values[idx]);
+		param_values[idx] = talloc_strdup(cache, param_value);
+		if (param_values[idx] == NULL) {
+			return false;
+		}
+		return true;
+	}
+	werr = smbconf_add_string_to_array(cache,
+				&(cache->param_names[cache->current_share]),
+				num_params, param_name);
+	if (!W_ERROR_IS_OK(werr)) {
+		return false;
+	}
+	werr = smbconf_add_string_to_array(cache,
+				&(cache->param_values[cache->current_share]),
+				num_params, param_value);
+	cache->num_params[cache->current_share]++;
+	return W_ERROR_IS_OK(werr);
+}
+
+static void smbconf_txt_flush_cache(struct smbconf_ctx *ctx)
+{
+	talloc_free(pd(ctx)->cache);
+	pd(ctx)->cache = NULL;
+}
+
+static WERROR smbconf_txt_init_cache(struct smbconf_ctx *ctx)
+{
+	if (pd(ctx)->cache != NULL) {
+		smbconf_txt_flush_cache(ctx);
+	}
+
+	pd(ctx)->cache = TALLOC_ZERO_P(pd(ctx), struct txt_cache);
+
+	if (pd(ctx)->cache == NULL) {
+		return WERR_NOMEM;
+	}
+
+	return WERR_OK;
+}
+
+static WERROR smbconf_txt_load_file(struct smbconf_ctx *ctx)
+{
+	WERROR werr;
+	uint64_t new_csn;
+
+	if (!file_exist(ctx->path)) {
+		return WERR_BADFILE;
+	}
+
+	new_csn = (uint64_t)file_modtime(ctx->path);
+	if (new_csn == pd(ctx)->csn) {
+		return WERR_OK;
+	}
+
+	werr = smbconf_txt_init_cache(ctx);
+	if (!W_ERROR_IS_OK(werr)) {
+		return werr;
+	}
+
+	if (!pm_process(ctx->path, smbconf_txt_do_section,
+			smbconf_txt_do_parameter, pd(ctx)))
+	{
+		return WERR_CAN_NOT_COMPLETE;
+	}
+
+	pd(ctx)->csn = new_csn;
+
+	return WERR_OK;
+}
+
+
+/**********************************************************************
+ *
+ * smbconf operations: text backend implementations
+ *
+ **********************************************************************/
+
+/**
+ * initialize the text based smbconf backend
+ */
+static WERROR smbconf_txt_init(struct smbconf_ctx *ctx, const char *path)
+{
+	if (path == NULL) {
+		return WERR_BADFILE;
+	}
+	ctx->path = talloc_strdup(ctx, path);
+	if (ctx->path == NULL) {
+		return WERR_NOMEM;
+	}
+
+	ctx->data = TALLOC_ZERO_P(ctx, struct txt_private_data);
+	if (ctx->data == NULL) {
+		return WERR_NOMEM;
+	}
+
+	pd(ctx)->verbatim = true;
+
+	return WERR_OK;
+}
+
+static int smbconf_txt_shutdown(struct smbconf_ctx *ctx)
+{
+	return ctx->ops->close_conf(ctx);
+}
+
+static bool smbconf_txt_requires_messaging(struct smbconf_ctx *ctx)
+{
+	return false;
+}
+
+static bool smbconf_txt_is_writeable(struct smbconf_ctx *ctx)
+{
+	/* no write support in this backend yet... */
+	return false;
+}
+
+static WERROR smbconf_txt_open(struct smbconf_ctx *ctx)
+{
+	return smbconf_txt_load_file(ctx);
+}
+
+static int smbconf_txt_close(struct smbconf_ctx *ctx)
+{
+	smbconf_txt_flush_cache(ctx);
+	return 0;
+}
+
+/**
+ * Get the change sequence number of the given service/parameter.
+ * service and parameter strings may be NULL.
+ */
+static void smbconf_txt_get_csn(struct smbconf_ctx *ctx,
+				struct smbconf_csn *csn,
+				const char *service, const char *param)
+{
+	if (csn == NULL) {
+		return;
+	}
+
+	csn->csn = (uint64_t)file_modtime(ctx->path);
+}
+
+/**
+ * Drop the whole configuration (restarting empty)
+ */
+static WERROR smbconf_txt_drop(struct smbconf_ctx *ctx)
+{
+	return WERR_NOT_SUPPORTED;
+}
+
+/**
+ * get the list of share names defined in the configuration.
+ */
+static WERROR smbconf_txt_get_share_names(struct smbconf_ctx *ctx,
+					  TALLOC_CTX *mem_ctx,
+					  uint32_t *num_shares,
+					  char ***share_names)
+{
+	uint32_t count;
+	uint32_t added_count = 0;
+	TALLOC_CTX *tmp_ctx = NULL;
+	WERROR werr = WERR_OK;
+	char **tmp_share_names = NULL;
+
+	if ((num_shares == NULL) || (share_names == NULL)) {
+		werr = WERR_INVALID_PARAM;
+		goto done;
+	}
+
+	werr = smbconf_txt_load_file(ctx);
+	if (!W_ERROR_IS_OK(werr)) {
+		return werr;
+	}
+
+	tmp_ctx = talloc_stackframe();
+
+	/* make sure "global" is always listed first,
+	 * possibly after NULL section */
+
+	if (smbconf_share_exists(ctx, NULL)) {
+		werr = smbconf_add_string_to_array(tmp_ctx, &tmp_share_names,
+						   0, NULL);
+		if (!W_ERROR_IS_OK(werr)) {
+			goto done;
+		}
+		added_count++;
+	}
+
+	if (smbconf_share_exists(ctx, GLOBAL_NAME)) {
+		werr = smbconf_add_string_to_array(tmp_ctx, &tmp_share_names,
+						   added_count, GLOBAL_NAME);
+		if (!W_ERROR_IS_OK(werr)) {
+			goto done;
+		}
+		added_count++;
+	}
+
+	for (count = 0; count < pd(ctx)->cache->num_shares; count++) {
+		if (strequal(pd(ctx)->cache->share_names[count], GLOBAL_NAME) ||
+		    (pd(ctx)->cache->share_names[count] == NULL))
+		{
+			continue;
+		}
+
+		werr = smbconf_add_string_to_array(tmp_ctx, &tmp_share_names,
+					added_count,
+					pd(ctx)->cache->share_names[count]);
+		if (!W_ERROR_IS_OK(werr)) {
+			goto done;
+		}
+		added_count++;
+	}
+
+	*num_shares = added_count;
+	if (added_count > 0) {
+		*share_names = talloc_move(mem_ctx, &tmp_share_names);
+	} else {
+		*share_names = NULL;
+	}
+
+done:
+	talloc_free(tmp_ctx);
+	return werr;
+}
+
+/**
+ * check if a share/service of a given name exists
+ */
+static bool smbconf_txt_share_exists(struct smbconf_ctx *ctx,
+				     const char *servicename)
+{
+	WERROR werr;
+
+	werr = smbconf_txt_load_file(ctx);
+	if (!W_ERROR_IS_OK(werr)) {
+		return false;
+	}
+
+	return smbconf_find_in_array(servicename,
+				     pd(ctx)->cache->share_names,
+				     pd(ctx)->cache->num_shares, NULL);
+}
+
+/**
+ * Add a service if it does not already exist
+ */
+static WERROR smbconf_txt_create_share(struct smbconf_ctx *ctx,
+				       const char *servicename)
+{
+	return WERR_NOT_SUPPORTED;
+}
+
+/**
+ * get a definition of a share (service) from configuration.
+ */
+static WERROR smbconf_txt_get_share(struct smbconf_ctx *ctx,
+				    TALLOC_CTX *mem_ctx,
+				    const char *servicename,
+				    struct smbconf_service **service)
+{
+	WERROR werr;
+	uint32_t sidx, count;
+	bool found;
+	TALLOC_CTX *tmp_ctx = NULL;
+	struct smbconf_service *tmp_service = NULL;
+
+	werr = smbconf_txt_load_file(ctx);
+	if (!W_ERROR_IS_OK(werr)) {
+		return werr;
+	}
+
+	found = smbconf_find_in_array(servicename,
+				      pd(ctx)->cache->share_names,
+				      pd(ctx)->cache->num_shares,
+				      &sidx);
+	if (!found) {
+		return WERR_NO_SUCH_SERVICE;
+	}
+
+	tmp_ctx = talloc_stackframe();
+
+	tmp_service = TALLOC_ZERO_P(tmp_ctx, struct smbconf_service);
+	if (tmp_service == NULL) {
+		werr = WERR_NOMEM;
+		goto done;
+	}
+
+	if (servicename != NULL) {
+		tmp_service->name = talloc_strdup(tmp_service, servicename);
+		if (tmp_service->name == NULL) {
+			werr = WERR_NOMEM;
+			goto done;
+		}
+	}
+
+	for (count = 0; count < pd(ctx)->cache->num_params[sidx]; count++) {
+		werr = smbconf_add_string_to_array(tmp_service,
+				&(tmp_service->param_names),
+				count,
+				pd(ctx)->cache->param_names[sidx][count]);
+		if (!W_ERROR_IS_OK(werr)) {
+			goto done;
+		}
+		werr = smbconf_add_string_to_array(tmp_service,
+				&(tmp_service->param_values),
+				count,
+				pd(ctx)->cache->param_values[sidx][count]);
+		if (!W_ERROR_IS_OK(werr)) {
+			goto done;
+		}
+	}
+
+	tmp_service->num_params = count;
+	if (count > 0) {
+		*service = talloc_move(mem_ctx, &tmp_service);
+	} else {
+		*service = NULL;
+	}
+
+done:
+	talloc_free(tmp_ctx);
+	return werr;
+}
+
+/**
+ * delete a service from configuration
+ */
+static WERROR smbconf_txt_delete_share(struct smbconf_ctx *ctx,
+				       const char *servicename)
+{
+	return WERR_NOT_SUPPORTED;
+}
+
+/**
+ * set a configuration parameter to the value provided.
+ */
+static WERROR smbconf_txt_set_parameter(struct smbconf_ctx *ctx,
+					const char *service,
+					const char *param,
+					const char *valstr)
+{
+	return WERR_NOT_SUPPORTED;
+}
+
+/**
+ * get the value of a configuration parameter as a string
+ */
+static WERROR smbconf_txt_get_parameter(struct smbconf_ctx *ctx,
+					TALLOC_CTX *mem_ctx,
+					const char *service,
+					const char *param,
+					char **valstr)
+{
+	WERROR werr;
+	bool found;
+	uint32_t share_index, param_index;
+
+	werr = smbconf_txt_load_file(ctx);
+	if (!W_ERROR_IS_OK(werr)) {
+		return werr;
+	}
+
+	found = smbconf_find_in_array(service,
+				      pd(ctx)->cache->share_names,
+				      pd(ctx)->cache->num_shares,
+				      &share_index);
+	if (!found) {
+		return WERR_NO_SUCH_SERVICE;
+	}
+
+	found = smbconf_reverse_find_in_array(param,
+				pd(ctx)->cache->param_names[share_index],
+				pd(ctx)->cache->num_params[share_index],
+				&param_index);
+	if (!found) {
+		return WERR_INVALID_PARAM;
+	}
+
+	*valstr = talloc_strdup(mem_ctx,
+			pd(ctx)->cache->param_values[share_index][param_index]);
+
+	if (*valstr == NULL) {
+		return WERR_NOMEM;
+	}
+
+	return WERR_OK;
+}
+
+/**
+ * delete a parameter from configuration
+ */
+static WERROR smbconf_txt_delete_parameter(struct smbconf_ctx *ctx,
+					   const char *service,
+					   const char *param)
+{
+	return WERR_NOT_SUPPORTED;
+}
+
+static WERROR smbconf_txt_get_includes(struct smbconf_ctx *ctx,
+				       TALLOC_CTX *mem_ctx,
+				       const char *service,
+				       uint32_t *num_includes,
+				       char ***includes)
+{
+	WERROR werr;
+	bool found;
+	uint32_t sidx, count;
+	TALLOC_CTX *tmp_ctx = NULL;
+	uint32_t tmp_num_includes = 0;
+	char **tmp_includes = NULL;
+
+	werr = smbconf_txt_load_file(ctx);
+	if (!W_ERROR_IS_OK(werr)) {
+		return werr;
+	}
+
+	found = smbconf_find_in_array(service,
+				      pd(ctx)->cache->share_names,
+				      pd(ctx)->cache->num_shares,
+				      &sidx);
+	if (!found) {
+		return WERR_NO_SUCH_SERVICE;
+	}
+
+	tmp_ctx = talloc_stackframe();
+
+	for (count = 0; count < pd(ctx)->cache->num_params[sidx]; count++) {
+		if (strequal(pd(ctx)->cache->param_names[sidx][count],
+			     "include"))
+		{
+			werr = smbconf_add_string_to_array(tmp_ctx,
+				&tmp_includes,
+				tmp_num_includes,
+				pd(ctx)->cache->param_values[sidx][count]);
+			if (!W_ERROR_IS_OK(werr)) {
+				goto done;
+			}
+			tmp_num_includes++;
+		}
+	}
+
+	*num_includes = tmp_num_includes;
+	if (*num_includes > 0) {
+		*includes = talloc_move(mem_ctx, &tmp_includes);
+		if (*includes == NULL) {
+			werr = WERR_NOMEM;
+			goto done;
+		}
+	} else {
+		*includes = NULL;
+	}
+
+	werr = WERR_OK;
+
+done:
+	talloc_free(tmp_ctx);
+	return werr;
+}
+
+static WERROR smbconf_txt_set_includes(struct smbconf_ctx *ctx,
+				       const char *service,
+				       uint32_t num_includes,
+				       const char **includes)
+{
+	return WERR_NOT_SUPPORTED;
+}
+
+static WERROR smbconf_txt_delete_includes(struct smbconf_ctx *ctx,
+					  const char *service)
+{
+	return WERR_NOT_SUPPORTED;
+}
+
+
+static struct smbconf_ops smbconf_ops_txt = {
+	.init			= smbconf_txt_init,
+	.shutdown		= smbconf_txt_shutdown,
+	.requires_messaging	= smbconf_txt_requires_messaging,
+	.is_writeable		= smbconf_txt_is_writeable,
+	.open_conf		= smbconf_txt_open,
+	.close_conf		= smbconf_txt_close,
+	.get_csn		= smbconf_txt_get_csn,
+	.drop			= smbconf_txt_drop,
+	.get_share_names	= smbconf_txt_get_share_names,
+	.share_exists		= smbconf_txt_share_exists,
+	.create_share		= smbconf_txt_create_share,
+	.get_share		= smbconf_txt_get_share,
+	.delete_share		= smbconf_txt_delete_share,
+	.set_parameter		= smbconf_txt_set_parameter,
+	.get_parameter		= smbconf_txt_get_parameter,
+	.delete_parameter	= smbconf_txt_delete_parameter,
+	.get_includes		= smbconf_txt_get_includes,
+	.set_includes		= smbconf_txt_set_includes,
+	.delete_includes	= smbconf_txt_delete_includes,
+};
+
+
+/**
+ * initialize the smbconf text backend
+ * the only function that is exported from this module
+ */
+WERROR smbconf_init_txt(TALLOC_CTX *mem_ctx,
+			struct smbconf_ctx **conf_ctx,
+			const char *path)
+{
+	WERROR werr;
+
+	werr = smbconf_init_internal(mem_ctx, conf_ctx, path, &smbconf_ops_txt);
+	if (!W_ERROR_IS_OK(werr)) {
+		return werr;
+	}
+
+	return smbconf_txt_load_file(*conf_ctx);
+}
diff --git a/lib/smbconf/smbconf_txt.h b/lib/smbconf/smbconf_txt.h
new file mode 100644
index 0000000000..688bbc9d48
--- /dev/null
+++ b/lib/smbconf/smbconf_txt.h
@@ -0,0 +1,33 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  libsmbconf - Samba configuration library
+ *  Copyright (C) Michael Adam 2009
+ *
+ *  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/>.
+ */
+
+#ifndef __LIBSMBCONF_TXT_H__
+#define __LIBSMBCONF_TXT_H__
+
+struct smbconf_ctx;
+
+/**
+ * initialization functions for the text/file backend modules
+ */
+
+WERROR smbconf_init_txt(TALLOC_CTX *mem_ctx,
+			struct smbconf_ctx **conf_ctx,
+			const char *path);
+
+#endif /*  _LIBSMBCONF_TXT_H_  */
diff --git a/lib/smbconf/smbconf_util.c b/lib/smbconf/smbconf_util.c
new file mode 100644
index 0000000000..5eb5e963ed
--- /dev/null
+++ b/lib/smbconf/smbconf_util.c
@@ -0,0 +1,151 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  libsmbconf - Samba configuration library, utility functions
+ *  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 "smbconf_private.h"
+
+
+static int smbconf_destroy_ctx(struct smbconf_ctx *ctx)
+{
+	return ctx->ops->shutdown(ctx);
+}
+
+/**
+ * Initialize the configuration.
+ *
+ * This should be the first function in a sequence of calls to smbconf
+ * functions:
+ *
+ * Upon success, this creates and returns the conf context
+ * that should be passed around in subsequent calls to the other
+ * smbconf functions.
+ *
+ * After the work with the configuration is completed, smbconf_shutdown()
+ * should be called.
+ */
+WERROR smbconf_init_internal(TALLOC_CTX *mem_ctx, struct smbconf_ctx **conf_ctx,
+			     const char *path, struct smbconf_ops *ops)
+{
+	WERROR werr = WERR_OK;
+	struct smbconf_ctx *ctx;
+
+	if (conf_ctx == NULL) {
+		return WERR_INVALID_PARAM;
+	}
+
+	ctx = TALLOC_ZERO_P(mem_ctx, struct smbconf_ctx);
+	if (ctx == NULL) {
+		return WERR_NOMEM;
+	}
+
+	ctx->ops = ops;
+
+	werr = ctx->ops->init(ctx, path);
+	if (!W_ERROR_IS_OK(werr)) {
+		goto fail;
+	}
+
+	talloc_set_destructor(ctx, smbconf_destroy_ctx);
+
+	*conf_ctx = ctx;
+	return werr;
+
+fail:
+	talloc_free(ctx);
+	return werr;
+}
+
+
+/**
+ * add a string to a talloced array of strings.
+ */
+WERROR smbconf_add_string_to_array(TALLOC_CTX *mem_ctx,
+				   char ***array,
+				   uint32_t count,
+				   const char *string)
+{
+	char **new_array = NULL;
+
+	if (array == NULL) {
+		return WERR_INVALID_PARAM;
+	}
+
+	new_array = TALLOC_REALLOC_ARRAY(mem_ctx, *array, char *, count + 1);
+	if (new_array == NULL) {
+		return WERR_NOMEM;
+	}
+
+	if (string == NULL) {
+		new_array[count] = NULL;
+	} else {
+		new_array[count] = talloc_strdup(new_array, string);
+		if (new_array[count] == NULL) {
+			talloc_free(new_array);
+			return WERR_NOMEM;
+		}
+	}
+
+	*array = new_array;
+
+	return WERR_OK;
+}
+
+bool smbconf_find_in_array(const char *string, char **list,
+			   uint32_t num_entries, uint32_t *entry)
+{
+	uint32_t i;
+
+	if (list == NULL) {
+		return false;
+	}
+
+	for (i = 0; i < num_entries; i++) {
+		if (((string == NULL) && (list[i] == NULL)) ||
+		    strequal(string, list[i]))
+		{
+			if (entry != NULL) {
+				*entry = i;
+			}
+			return true;
+		}
+	}
+
+	return false;
+}
+
+bool smbconf_reverse_find_in_array(const char *string, char **list,
+				   uint32_t num_entries, uint32_t *entry)
+{
+	int32_t i;
+
+	if ((string == NULL) || (list == NULL) || (num_entries == 0)) {
+		return false;
+	}
+
+	for (i = num_entries - 1; i >= 0; i--) {
+		if (strequal(string, list[i])) {
+			if (entry != NULL) {
+				*entry = i;
+			}
+			return true;
+		}
+	}
+
+	return false;
+}