s4-ldb: added ldb_options_find()

ldb_options_find() allows backends to find options in the options[]
array passed to the connect operation.

This will be used by the ldb_ldap bind code

2 files changed, 76 insertions, 4 deletions

diff --git a/source4/lib/ldb/common/ldb_modules.c b/source4/lib/ldb/common/ldb_modules.c
index 6e92fc510d..e4e2c1586d 100644
--- a/source4/lib/ldb/common/ldb_modules.c
+++ b/source4/lib/ldb/common/ldb_modules.c
@@ -397,6 +397,7 @@ int ldb_init_module_chain(struct ldb_context *ldb, struct ldb_module *module)
 
 int ldb_load_modules(struct ldb_context *ldb, const char *options[])
 {
+	const char *modules_string;
 	const char **modules = NULL;
 	unsigned int i;
 	int ret;
@@ -409,10 +410,9 @@ int ldb_load_modules(struct ldb_context *ldb, const char *options[])
 
 	/* check if we have a custom module list passd as ldb option */
 	if (options) {
-		for (i = 0; options[i] != NULL; i++) {
-			if (strncmp(options[i], LDB_MODULE_PREFIX, LDB_MODULE_PREFIX_LEN) == 0) {
-				modules = ldb_modules_list_from_string(ldb, mem_ctx, &options[i][LDB_MODULE_PREFIX_LEN]);
-			}
+		modules_string = ldb_options_find(ldb, options, "modules");
+		if (modules_string) {
+			modules = ldb_modules_list_from_string(ldb, mem_ctx, modules_string);
 		}
 	}
 
diff --git a/source4/lib/ldb/common/ldb_options.c b/source4/lib/ldb/common/ldb_options.c
new file mode 100644
index 0000000000..f806057eb6
--- /dev/null
+++ b/source4/lib/ldb/common/ldb_options.c
@@ -0,0 +1,72 @@
+/*
+   ldb database library
+
+   Copyright (C) Andrew Tridgell  2010
+
+     ** 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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+ *  Name: ldb
+ *
+ *  Component: ldb options[] handling
+ *
+ *  Author: Andrew Tridgell
+ */
+
+#include "ldb_private.h"
+
+/*
+  find an option within an options array
+
+  accepts the following forms:
+
+     NAME
+     NAME:value
+     NAME=value
+
+  returns a pointer into an element of the options[] array, or NULL is
+  not found.
+
+  For the NAME form, returns a pointer to an empty string (thus
+  allowing for boolean options).
+ */
+_PRIVATE_ const char *ldb_options_find(struct ldb_context *ldb, const char *options[],
+				       const char *option_name)
+{
+	size_t len = strlen(option_name);
+	int i;
+
+	if (options == NULL) {
+		return NULL;
+	}
+
+	for (i=0; options[i]; i++) {
+		if (strncmp(option_name, options[i], len) != 0) {
+			continue;
+		}
+		if (options[i][len] == ':' || options[i][len] == '=') {
+			return &options[i][len+1];
+		}
+		if (options[i][len] == 0) {
+			return &options[i][len];
+		}
+	}
+
+	return NULL;
+}