add revert, merge package handler functions

[project/uci.git] / libuci.c

diff --git a/libuci.c b/libuci.c
index a503699..5b5db54 100644 (file)
--- a/libuci.c
+++ b/libuci.c
@@ -137,7 +137,7 @@ void uci_perror(struct uci_context *ctx, const char *prefix)
        if (!ctx)
                err = UCI_ERR_INVAL;
        else
-               err = ctx->errno;
+               err = ctx->err;
 
        if ((err < 0) || (err >= UCI_ERR_LAST))
                err = UCI_ERR_UNKNOWN;
@@ -193,18 +193,56 @@ int uci_load(struct uci_context *ctx, const char *name, struct uci_package **pac
        return 0;
 }
 
-int uci_add_backend(struct uci_context *ctx, struct uci_backend *b)
+#ifdef UCI_PLUGIN_SUPPORT
+
+__plugin int uci_add_backend(struct uci_context *ctx, struct uci_backend *b)
 {
        struct uci_element *e;
        UCI_HANDLE_ERR(ctx);
+
        e = uci_lookup_list(&ctx->backends, b->e.name);
        if (e)
                UCI_THROW(ctx, UCI_ERR_DUPLICATE);
 
-       uci_list_add(&ctx->backends, &b->e.list);
+       e = uci_malloc(ctx, sizeof(struct uci_backend));
+       memcpy(e, b, sizeof(struct uci_backend));
+
+       uci_list_add(&ctx->backends, &e->list);
        return 0;
 }
 
+__plugin int uci_del_backend(struct uci_context *ctx, struct uci_backend *b)
+{
+       struct uci_element *e, *tmp;
+
+       UCI_HANDLE_ERR(ctx);
+
+       e = uci_lookup_list(&ctx->backends, b->e.name);
+       if (!e || uci_to_backend(e)->ptr != b->ptr)
+               UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+       b = uci_to_backend(e);
+
+       if (ctx->backend && ctx->backend->ptr == b->ptr)
+               ctx->backend = &uci_file_backend;
+
+       uci_foreach_element_safe(&ctx->root, tmp, e) {
+               struct uci_package *p = uci_to_package(e);
+
+               if (!p->backend)
+                       continue;
+
+               if (p->backend->ptr == b->ptr)
+                       UCI_INTERNAL(uci_unload, ctx, p);
+       }
+
+       uci_list_del(&b->e.list);
+       free(b);
+
+       return 0;
+}
+
+#endif
+
 int uci_set_backend(struct uci_context *ctx, const char *name)
 {
        struct uci_element *e;