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-rw-r--r--source4/lib/ldb/common/ldb_modules.c265
1 files changed, 265 insertions, 0 deletions
diff --git a/source4/lib/ldb/common/ldb_modules.c b/source4/lib/ldb/common/ldb_modules.c
new file mode 100644
index 0000000000..a7cfd81d46
--- /dev/null
+++ b/source4/lib/ldb/common/ldb_modules.c
@@ -0,0 +1,265 @@
+
+/*
+ ldb database library
+
+ Copyright (C) Simo Sorce 2004
+
+ ** 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 2 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, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+/*
+ * Name: ldb
+ *
+ * Component: ldb modules core
+ *
+ * Description: core modules routines
+ *
+ * Author: Simo Sorce
+ */
+
+#include "includes.h"
+#include "dlinklist.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#define LDB_MODULE_PREFIX "modules"
+#define LDB_MODULE_PREFIX_LEN 7
+#define LDB_MODULE_SEP ':'
+
+int ldb_load_modules(struct ldb_context *ldb, const char *options[])
+{
+ struct ldb_module *current;
+ char **modules;
+ char *p, *q;
+ int pn, i;
+
+ /* find out which modules we are requested to activate */
+ modules = NULL;
+ pn = 0;
+
+ if (options) {
+
+ for (i = 0; options[i] != NULL; i++) {
+
+ if (strncmp(options[i], LDB_MODULE_PREFIX, LDB_MODULE_PREFIX_LEN) == 0) {
+
+ p = q = ldb_strdup(ldb, &options[i][LDB_MODULE_PREFIX_LEN]);
+ if (*q != ':') {
+ ldb_free(ldb, q);
+ return -1;
+ }
+ do {
+ *p = '\0';
+ q = p + 1;
+ pn++;
+ modules = ldb_realloc_array(ldb, modules, sizeof(char *), pn);
+ if (!modules) {
+ ldb_debug(ldb, LDB_DEBUG_FATAL, "Out of Memory in register_modules()\n");
+ return -1;
+ }
+ modules[pn - 1] = q;
+ } while ((p = strchr(q, LDB_MODULE_SEP)));
+ }
+ }
+ }
+
+ if (!modules) { /* no modules in the options, look for @MODULES in the db */
+ int ret, j, k;
+ char * attrs[] = { "@MODULE" };
+ struct ldb_message **msg;
+
+ ret = ldb_search(ldb, "", LDB_SCOPE_BASE, "dn=@MODULES", (const char * const *)attrs, &msg);
+ if (ret == 0) {
+ ldb_debug(ldb, LDB_DEBUG_TRACE, "no modules required by the db\n");
+ } else {
+ if (ret < 0) {
+ ldb_debug(ldb, LDB_DEBUG_FATAL, "ldb error (%s) occurred searching for modules, bailing out\n", ldb_errstring(ldb));
+ return -1;
+ }
+ if (ret > 1) {
+ ldb_debug(ldb, LDB_DEBUG_FATAL, "Too many records found, bailing out\n");
+ return -1;
+ }
+
+ for (j = 0; j < msg[0]->num_elements; j++) {
+ for (k = 0; k < msg[0]->elements[j].num_values; k++) {
+ pn++;
+ modules = ldb_realloc_array(ldb, modules, sizeof(char *), pn);
+ if (!modules) {
+ ldb_debug(ldb, LDB_DEBUG_FATAL, "Out of Memory in register_modules()\n");
+ return -1;
+ }
+ modules[pn - 1] = ldb_strndup(ldb, msg[0]->elements[j].values[k].data, msg[0]->elements[j].values[k].length);
+ if (!modules[pn - 1]) {
+ ldb_debug(ldb, LDB_DEBUG_FATAL, "Out of Memory in register_modules()\n");
+ return -1;
+ }
+ }
+ }
+ }
+ ldb_search_free(ldb, msg);
+ }
+
+ if (modules) {
+
+ for (i = 0; i < pn; i++) {
+
+ if (strcmp(modules[i], "timestamps") == 0) {
+ current = timestamps_module_init(ldb, options);
+ if (!current) {
+ ldb_debug(ldb, LDB_DEBUG_FATAL, "function 'init_module' in %s fails\n", modules[i]);
+ return -1;
+ }
+ DLIST_ADD(ldb->modules, current);
+ continue;
+ }
+#if 0
+ if (strcmp(modules[i], "schema") == 0) {
+ current = schema_module_init(ldb, options);
+ if (!current) {
+ ldb_debug(ldb, LDB_DEBUG_FATAL, "function 'init_module' in %s fails\n", modules[i]);
+ return -1;
+ }
+ DLIST_ADD(ldb->modules, current);
+ continue;
+ }
+#endif
+#ifdef HAVE_DLOPEN_DISABLED
+ {
+ void *handle;
+ init_ldb_module_function init;
+ struct stat st;
+ const char *errstr;
+
+ if (stat(modules[i], &st) < 0) {
+ ldb_debug(ldb, LDB_DEBUG_FATAL, "Required module [%s] not found, bailing out!\n", modules[i]);
+ return -1;
+ }
+
+ handle = dlopen(modules[i], RTLD_LAZY);
+
+ if (!handle) {
+ ldb_debug(ldb, LDB_DEBUG_FATAL, "Error loading module %s [%s]\n", modules[i], dlerror());
+ return -1;
+ }
+
+ init = (init_ldb_module_function)dlsym(handle, "init_module");
+
+ errstr = dlerror();
+ if (errstr) {
+ ldb_debug(ldb, LDB_DEBUG_FATAL, "Error trying to resolve symbol 'init_module' in %s [%s]\n", modules[i], errstr);
+ return -1;
+ }
+
+ current = init(ldb, options);
+ if (!current) {
+ ldb_debug(ldb, LDB_DEBUG_FATAL, "function 'init_module' in %s fails\n", modules[i]);
+ return -1;
+ }
+ DLIST_ADD(ldb->modules, current);
+ }
+#else
+ ldb_debug(ldb, LDB_DEBUG_FATAL, "Required module [%s] not found, bailing out!\n", modules[i]);
+ return -1;
+#endif
+ }
+ }
+
+ return 0;
+}
+
+/*
+ helper functions to call the next module in chain
+*/
+int ldb_next_close(struct ldb_module *module)
+{
+ if (!module->next) {
+ return -1;
+ }
+ return module->next->ops->close(module->next);
+}
+
+int ldb_next_search(struct ldb_module *module,
+ const char *base,
+ enum ldb_scope scope,
+ const char *expression,
+ const char * const *attrs, struct ldb_message ***res)
+{
+ if (!module->next) {
+ return -1;
+ }
+ return module->next->ops->search(module->next, base, scope, expression, attrs, res);
+}
+
+int ldb_next_search_free(struct ldb_module *module, struct ldb_message **msg)
+{
+ if (!module->next) {
+ return -1;
+ }
+ return module->next->ops->search_free(module->next, msg);
+}
+
+int ldb_next_add_record(struct ldb_module *module, const struct ldb_message *message)
+{
+ if (!module->next) {
+ return -1;
+ }
+ return module->next->ops->add_record(module->next, message);
+}
+
+int ldb_next_modify_record(struct ldb_module *module, const struct ldb_message *message)
+{
+ if (!module->next) {
+ return -1;
+ }
+ return module->next->ops->modify_record(module->next, message);
+}
+
+int ldb_next_delete_record(struct ldb_module *module, const char *dn)
+{
+ if (!module->next) {
+ return -1;
+ }
+ return module->next->ops->delete_record(module->next, dn);
+}
+
+int ldb_next_rename_record(struct ldb_module *module, const char *olddn, const char *newdn)
+{
+ if (!module->next) {
+ return -1;
+ }
+ return module->next->ops->rename_record(module->next, olddn, newdn);
+}
+
+const char *ldb_next_errstring(struct ldb_module *module)
+{
+ if (!module->next) {
+ return NULL;
+ }
+ return module->next->ops->errstring(module->next);
+}
+
+void ldb_next_cache_free(struct ldb_module *module)
+{
+ if (!module->next) {
+ return;
+ }
+ module->next->ops->cache_free(module->next);
+}
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