add uci_set_backend()

4 files changed, 26 insertions, 6 deletions

diff --git a/file.c b/file.c
index 883e360..29ff318 100644
--- a/file.c
+++ b/file.c
@@ -69,7 +69,7 @@ static void uci_switch_config(struct uci_context *ctx)
 	 * if an older config under the same name exists, unload it
 	 * ignore errors here, e.g. if the config was not found
 	 */
-	e = uci_lookup_list(ctx, &ctx->root, name);
+	e = uci_lookup_list(&ctx->root, name);
 	if (e)
 		UCI_THROW(ctx, UCI_ERR_DUPLICATE);
 	pctx->package = uci_alloc_package(ctx, name);
diff --git a/libuci.c b/libuci.c
index 6bbc874..50c17f9 100644
--- a/libuci.c
+++ b/libuci.c
@@ -194,4 +194,15 @@ int uci_load(struct uci_context *ctx, const char *name, struct uci_package **pac
 	return 0;
 }
 
+int uci_set_backend(struct uci_context *ctx, const char *name)
+{
+	struct uci_element *e;
 
+	UCI_HANDLE_ERR(ctx);
+	UCI_ASSERT(ctx, name != NULL);
+	e = uci_lookup_list(&ctx->backends, name);
+	if (!e)
+		UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+	ctx->backend = uci_to_backend(e);
+	return 0;
+}
diff --git a/list.c b/list.c
index aabcab0..fb4d478 100644
--- a/list.c
+++ b/list.c
@@ -217,7 +217,7 @@ uci_free_package(struct uci_package **package)
 	*package = NULL;
 }
 
-static struct uci_element *uci_lookup_list(struct uci_context *ctx, struct uci_list *list, const char *name)
+static struct uci_element *uci_lookup_list(struct uci_list *list, const char *name)
 {
 	struct uci_element *e;
 
@@ -240,13 +240,13 @@ int uci_lookup(struct uci_context *ctx, struct uci_element **res, struct uci_pac
 	if (option)
 		UCI_ASSERT(ctx, uci_validate_name(option));
 
-	e = uci_lookup_list(ctx, &p->sections, section);
+	e = uci_lookup_list(&p->sections, section);
 	if (!e)
 		goto notfound;
 
 	if (option) {
 		s = uci_to_section(e);
-		e = uci_lookup_list(ctx, &s->options, option);
+		e = uci_lookup_list(&s->options, option);
 		if (!e)
 			goto notfound;
 	}
@@ -451,7 +451,7 @@ int uci_set(struct uci_context *ctx, struct uci_package *p, char *section, char
 	 * if the section/option is to be modified and it is not found
 	 * create a new element in the appropriate list
 	 */
-	e = uci_lookup_list(ctx, &p->sections, section);
+	e = uci_lookup_list(&p->sections, section);
 	if (!e)
 		goto notfound;
 
@@ -460,7 +460,7 @@ int uci_set(struct uci_context *ctx, struct uci_package *p, char *section, char
 		ctx->pctx->section = s;
 
 	if (option) {
-		e = uci_lookup_list(ctx, &s->options, option);
+		e = uci_lookup_list(&s->options, option);
 		if (!e)
 			goto notfound;
 		o = uci_to_option(e);
diff --git a/uci.h b/uci.h
index 4855170..29cd07d 100644
--- a/uci.h
+++ b/uci.h
@@ -275,6 +275,15 @@ extern int uci_revert(struct uci_context *ctx, struct uci_package **p, char *sec
  */
 extern int uci_parse_argument(struct uci_context *ctx, FILE *stream, char **str, char **result);
 
+/**
+ * uci_set_backend: change the default backend
+ * @ctx: uci context
+ * @name: name of the backend
+ *
+ * The default backend is "file", which uses /etc/config for config storage
+ */
+extern int uci_set_backend(struct uci_context *ctx, const char *name);
+
 /* UCI data structures */
 enum uci_type {
 	UCI_TYPE_HISTORY = 0,