s4-ldb: added support for general ldb hooks in modules

this allows a ldb module to register a hook function called at various
stages of processing. It will be initially used for ldb command line
hooks, but should work generally.

Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>

1 files changed, 20 insertions, 1 deletions

diff --git a/source4/lib/ldb/include/ldb_module.h b/source4/lib/ldb/include/ldb_module.h
index 71c3cd8f7b..800bf72e44 100644
--- a/source4/lib/ldb/include/ldb_module.h
+++ b/source4/lib/ldb/include/ldb_module.h
@@ -185,7 +185,7 @@ struct ldb_backend_ops {
 
 const char *ldb_default_modules_dir(void);
 
-int ldb_register_backend(const char *url_prefix, ldb_connect_fn);
+int ldb_register_backend(const char *url_prefix, ldb_connect_fn, bool);
 
 struct ldb_handle *ldb_handle_new(TALLOC_CTX *mem_ctx, struct ldb_context *ldb);
 
@@ -233,4 +233,23 @@ int ldb_modules_load(const char *modules_path, const char *version);
 /* init functions prototype */
 typedef int (*ldb_module_init_fn)(const char *);
 
+/*
+  general ldb hook function
+ */
+enum ldb_module_hook_type { LDB_MODULE_HOOK_CMDLINE_OPTIONS     = 1,
+			    LDB_MODULE_HOOK_CMDLINE_PRECONNECT  = 2,
+			    LDB_MODULE_HOOK_CMDLINE_POSTCONNECT = 3 };
+
+typedef int (*ldb_hook_fn)(struct ldb_context *, enum ldb_module_hook_type );
+
+/*
+  register a ldb hook function
+ */
+int ldb_register_hook(ldb_hook_fn hook_fn);
+
+/*
+  call ldb hooks of a given type
+ */
+int ldb_modules_hook(struct ldb_context *ldb, enum ldb_module_hook_type t);
+
 #endif