enhance error handling in frontend commands

src/capture.c

@@ -287,6 +287,7 @@ static enum ec3_status capture_directory(
 	vnode.v_id = ctx->ctx_tree.fs_root->n_id;
 	ec3_volume_put_vnode(volume, &vnode);
 
+	enum ec3_status status2 = EC3_SUCCESS;
 	b_directory_iterator it;
 	b_directory_iterator_begin(dir, &it, B_DIRECTORY_ITERATE_PARENT_LAST);
 	while (b_directory_iterator_is_valid(&it)) {
@@ -300,7 +301,7 @@ static enum ec3_status capture_directory(
 
 		printf("file: %s\n", b_path_ptr(it.filepath));
 
-		enum ec3_status status2 = capture_file(
+		status2 = capture_file(
 			ctx,
 			volume,
 			dir,
@@ -334,7 +335,7 @@ static enum ec3_status capture_directory(
 	ec3_tag_ioctx_close(volu);
 
 	b_directory_release(dir);
-	return EC3_SUCCESS;
+	return status2;
 }
 
 static int capture(