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-rw-r--r--lib/smbconf/smbconf_txt.c668
1 files changed, 668 insertions, 0 deletions
diff --git a/lib/smbconf/smbconf_txt.c b/lib/smbconf/smbconf_txt.c
new file mode 100644
index 0000000..5c4bd27
--- /dev/null
+++ b/lib/smbconf/smbconf_txt.c
@@ -0,0 +1,668 @@
+/*
+ * 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"
+#include "lib/smbconf/smbconf_txt.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)
+{
+ sbcErr err;
+ 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;
+ }
+
+ err = smbconf_add_string_to_array(cache, &(cache->share_names),
+ cache->num_shares, section);
+ if (!SBC_ERROR_IS_OK(err)) {
+ return false;
+ }
+ cache->current_share = cache->num_shares;
+ cache->num_shares++;
+
+ cache->param_names = talloc_realloc(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(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(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)
+{
+ sbcErr err;
+ 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;
+ }
+ err = smbconf_add_string_to_array(cache,
+ &(cache->param_names[cache->current_share]),
+ num_params, param_name);
+ if (!SBC_ERROR_IS_OK(err)) {
+ return false;
+ }
+ err = smbconf_add_string_to_array(cache,
+ &(cache->param_values[cache->current_share]),
+ num_params, param_value);
+ cache->num_params[cache->current_share]++;
+ return SBC_ERROR_IS_OK(err);
+}
+
+static void smbconf_txt_flush_cache(struct smbconf_ctx *ctx)
+{
+ talloc_free(pd(ctx)->cache);
+ pd(ctx)->cache = NULL;
+}
+
+static sbcErr smbconf_txt_init_cache(struct smbconf_ctx *ctx)
+{
+ if (pd(ctx)->cache != NULL) {
+ smbconf_txt_flush_cache(ctx);
+ }
+
+ pd(ctx)->cache = talloc_zero(pd(ctx), struct txt_cache);
+
+ if (pd(ctx)->cache == NULL) {
+ return SBC_ERR_NOMEM;
+ }
+
+ return SBC_ERR_OK;
+}
+
+static sbcErr smbconf_txt_load_file(struct smbconf_ctx *ctx)
+{
+ sbcErr err;
+ uint64_t new_csn;
+
+ if (!file_exist(ctx->path)) {
+ return SBC_ERR_BADFILE;
+ }
+
+ new_csn = (uint64_t)file_modtime(ctx->path);
+ if (new_csn == pd(ctx)->csn) {
+ return SBC_ERR_OK;
+ }
+
+ err = smbconf_txt_init_cache(ctx);
+ if (!SBC_ERROR_IS_OK(err)) {
+ return err;
+ }
+
+ if (!pm_process(ctx->path, smbconf_txt_do_section,
+ smbconf_txt_do_parameter, pd(ctx)))
+ {
+ return SBC_ERR_CAN_NOT_COMPLETE;
+ }
+
+ pd(ctx)->csn = new_csn;
+
+ return SBC_ERR_OK;
+}
+
+
+/**********************************************************************
+ *
+ * smbconf operations: text backend implementations
+ *
+ **********************************************************************/
+
+/**
+ * initialize the text based smbconf backend
+ */
+static sbcErr smbconf_txt_init(struct smbconf_ctx *ctx, const char *path)
+{
+ if (path == NULL) {
+ return SBC_ERR_BADFILE;
+ }
+ ctx->path = talloc_strdup(ctx, path);
+ if (ctx->path == NULL) {
+ return SBC_ERR_NOMEM;
+ }
+
+ ctx->data = talloc_zero(ctx, struct txt_private_data);
+ if (ctx->data == NULL) {
+ return SBC_ERR_NOMEM;
+ }
+
+ pd(ctx)->verbatim = true;
+
+ return SBC_ERR_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 sbcErr 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 sbcErr smbconf_txt_drop(struct smbconf_ctx *ctx)
+{
+ return SBC_ERR_NOT_SUPPORTED;
+}
+
+/**
+ * get the list of share names defined in the configuration.
+ */
+static sbcErr 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;
+ sbcErr err = SBC_ERR_OK;
+ char **tmp_share_names = NULL;
+
+ if ((num_shares == NULL) || (share_names == NULL)) {
+ return SBC_ERR_INVALID_PARAM;
+ }
+
+ err = smbconf_txt_load_file(ctx);
+ if (!SBC_ERROR_IS_OK(err)) {
+ return err;
+ }
+
+ tmp_ctx = talloc_stackframe();
+
+ /* make sure "global" is always listed first,
+ * possibly after NULL section */
+
+ if (smbconf_share_exists(ctx, NULL)) {
+ err = smbconf_add_string_to_array(tmp_ctx, &tmp_share_names,
+ 0, NULL);
+ if (!SBC_ERROR_IS_OK(err)) {
+ goto done;
+ }
+ added_count++;
+ }
+
+ if (smbconf_share_exists(ctx, GLOBAL_NAME)) {
+ err = smbconf_add_string_to_array(tmp_ctx, &tmp_share_names,
+ added_count, GLOBAL_NAME);
+ if (!SBC_ERROR_IS_OK(err)) {
+ 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;
+ }
+
+ err = smbconf_add_string_to_array(tmp_ctx, &tmp_share_names,
+ added_count,
+ pd(ctx)->cache->share_names[count]);
+ if (!SBC_ERROR_IS_OK(err)) {
+ 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 err;
+}
+
+/**
+ * check if a share/service of a given name exists
+ */
+static bool smbconf_txt_share_exists(struct smbconf_ctx *ctx,
+ const char *servicename)
+{
+ sbcErr err;
+
+ err = smbconf_txt_load_file(ctx);
+ if (!SBC_ERROR_IS_OK(err)) {
+ 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 sbcErr smbconf_txt_create_share(struct smbconf_ctx *ctx,
+ const char *servicename)
+{
+ return SBC_ERR_NOT_SUPPORTED;
+}
+
+/**
+ * get a definition of a share (service) from configuration.
+ */
+static sbcErr smbconf_txt_get_share(struct smbconf_ctx *ctx,
+ TALLOC_CTX *mem_ctx,
+ const char *servicename,
+ struct smbconf_service **service)
+{
+ sbcErr err;
+ uint32_t sidx, count;
+ bool found;
+ TALLOC_CTX *tmp_ctx = NULL;
+ struct smbconf_service *tmp_service = NULL;
+
+ err = smbconf_txt_load_file(ctx);
+ if (!SBC_ERROR_IS_OK(err)) {
+ return err;
+ }
+
+ found = smbconf_find_in_array(servicename,
+ pd(ctx)->cache->share_names,
+ pd(ctx)->cache->num_shares,
+ &sidx);
+ if (!found) {
+ return SBC_ERR_NO_SUCH_SERVICE;
+ }
+
+ tmp_ctx = talloc_stackframe();
+
+ tmp_service = talloc_zero(tmp_ctx, struct smbconf_service);
+ if (tmp_service == NULL) {
+ err = SBC_ERR_NOMEM;
+ goto done;
+ }
+
+ if (servicename != NULL) {
+ tmp_service->name = talloc_strdup(tmp_service, servicename);
+ if (tmp_service->name == NULL) {
+ err = SBC_ERR_NOMEM;
+ goto done;
+ }
+ }
+
+ for (count = 0; count < pd(ctx)->cache->num_params[sidx]; count++) {
+ err = smbconf_add_string_to_array(tmp_service,
+ &(tmp_service->param_names),
+ count,
+ pd(ctx)->cache->param_names[sidx][count]);
+ if (!SBC_ERROR_IS_OK(err)) {
+ goto done;
+ }
+ err = smbconf_add_string_to_array(tmp_service,
+ &(tmp_service->param_values),
+ count,
+ pd(ctx)->cache->param_values[sidx][count]);
+ if (!SBC_ERROR_IS_OK(err)) {
+ goto done;
+ }
+ }
+
+ tmp_service->num_params = count;
+ *service = talloc_move(mem_ctx, &tmp_service);
+
+done:
+ talloc_free(tmp_ctx);
+ return err;
+}
+
+/**
+ * delete a service from configuration
+ */
+static sbcErr smbconf_txt_delete_share(struct smbconf_ctx *ctx,
+ const char *servicename)
+{
+ return SBC_ERR_NOT_SUPPORTED;
+}
+
+/**
+ * set a configuration parameter to the value provided.
+ */
+static sbcErr smbconf_txt_set_parameter(struct smbconf_ctx *ctx,
+ const char *service,
+ const char *param,
+ const char *valstr)
+{
+ return SBC_ERR_NOT_SUPPORTED;
+}
+
+/**
+ * get the value of a configuration parameter as a string
+ */
+static sbcErr smbconf_txt_get_parameter(struct smbconf_ctx *ctx,
+ TALLOC_CTX *mem_ctx,
+ const char *service,
+ const char *param,
+ char **valstr)
+{
+ sbcErr err;
+ bool found;
+ uint32_t share_index, param_index;
+
+ err = smbconf_txt_load_file(ctx);
+ if (!SBC_ERROR_IS_OK(err)) {
+ return err;
+ }
+
+ found = smbconf_find_in_array(service,
+ pd(ctx)->cache->share_names,
+ pd(ctx)->cache->num_shares,
+ &share_index);
+ if (!found) {
+ return SBC_ERR_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 SBC_ERR_INVALID_PARAM;
+ }
+
+ *valstr = talloc_strdup(mem_ctx,
+ pd(ctx)->cache->param_values[share_index][param_index]);
+
+ if (*valstr == NULL) {
+ return SBC_ERR_NOMEM;
+ }
+
+ return SBC_ERR_OK;
+}
+
+/**
+ * delete a parameter from configuration
+ */
+static sbcErr smbconf_txt_delete_parameter(struct smbconf_ctx *ctx,
+ const char *service,
+ const char *param)
+{
+ return SBC_ERR_NOT_SUPPORTED;
+}
+
+static sbcErr smbconf_txt_get_includes(struct smbconf_ctx *ctx,
+ TALLOC_CTX *mem_ctx,
+ const char *service,
+ uint32_t *num_includes,
+ char ***includes)
+{
+ sbcErr err;
+ bool found;
+ uint32_t sidx, count;
+ TALLOC_CTX *tmp_ctx = NULL;
+ uint32_t tmp_num_includes = 0;
+ char **tmp_includes = NULL;
+
+ err = smbconf_txt_load_file(ctx);
+ if (!SBC_ERROR_IS_OK(err)) {
+ return err;
+ }
+
+ found = smbconf_find_in_array(service,
+ pd(ctx)->cache->share_names,
+ pd(ctx)->cache->num_shares,
+ &sidx);
+ if (!found) {
+ return SBC_ERR_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"))
+ {
+ err = smbconf_add_string_to_array(tmp_ctx,
+ &tmp_includes,
+ tmp_num_includes,
+ pd(ctx)->cache->param_values[sidx][count]);
+ if (!SBC_ERROR_IS_OK(err)) {
+ goto done;
+ }
+ tmp_num_includes++;
+ }
+ }
+
+ *num_includes = tmp_num_includes;
+ if (*num_includes > 0) {
+ *includes = talloc_move(mem_ctx, &tmp_includes);
+ if (*includes == NULL) {
+ err = SBC_ERR_NOMEM;
+ goto done;
+ }
+ } else {
+ *includes = NULL;
+ }
+
+ err = SBC_ERR_OK;
+
+done:
+ talloc_free(tmp_ctx);
+ return err;
+}
+
+static sbcErr smbconf_txt_set_includes(struct smbconf_ctx *ctx,
+ const char *service,
+ uint32_t num_includes,
+ const char **includes)
+{
+ return SBC_ERR_NOT_SUPPORTED;
+}
+
+static sbcErr smbconf_txt_delete_includes(struct smbconf_ctx *ctx,
+ const char *service)
+{
+ return SBC_ERR_NOT_SUPPORTED;
+}
+
+static sbcErr smbconf_txt_transaction_start(struct smbconf_ctx *ctx)
+{
+ return SBC_ERR_OK;
+}
+
+static sbcErr smbconf_txt_transaction_commit(struct smbconf_ctx *ctx)
+{
+ return SBC_ERR_OK;
+}
+
+static sbcErr smbconf_txt_transaction_cancel(struct smbconf_ctx *ctx)
+{
+ return SBC_ERR_OK;
+}
+
+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,
+ .transaction_start = smbconf_txt_transaction_start,
+ .transaction_commit = smbconf_txt_transaction_commit,
+ .transaction_cancel = smbconf_txt_transaction_cancel,
+};
+
+
+/**
+ * initialize the smbconf text backend
+ * the only function that is exported from this module
+ */
+sbcErr smbconf_init_txt(TALLOC_CTX *mem_ctx,
+ struct smbconf_ctx **conf_ctx,
+ const char *path)
+{
+ sbcErr err;
+
+ err = smbconf_init_internal(mem_ctx, conf_ctx, path, &smbconf_ops_txt);
+ if (!SBC_ERROR_IS_OK(err)) {
+ return err;
+ }
+
+ return smbconf_txt_load_file(*conf_ctx);
+}
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