--- /dev/null
+/**
+ * Implements hook_file_validate().
+ */
+function {{ machine_name }}_file_validate($file) {
+ $errors = array();
+
+ if (empty($file->filename)) {
+ $errors[] = t("The file's name is empty. Please give a name to the file.");
+ }
+ if (strlen($file->filename) > 255) {
+ $errors[] = t("The file's name exceeds the 255 characters limit. Please rename the file and try again.");
+ }
+
+ return $errors;
+}