--- a/src/os/unix/ngx_files.c
+++ b/src/os/unix/ngx_files.c
@@ -169,6 +169,20 @@ ssize_t ngx_write_chain_to_file(ngx_file
 }
 
 
+int ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir)
+{
+    dir->dir = opendir(name->data);
+
+    if (dir->dir == NULL) {
+        return NGX_ERROR;
+    }
+
+    dir->info_valid = 0;
+
+    return NGX_OK;
+}
+
+
 #if 0
 
 ssize_t ngx_read_file(ngx_file_t *file, char *buf, size_t size, off_t offset)