diff --git a/src/config_util.rs b/src/config_util.rs
index 1ee437c..b95dd52 100644
--- a/src/config_util.rs
+++ b/src/config_util.rs
@@ -27,12 +27,14 @@ pub const DOT_OSS_BACKUPD_CONFIG: &str = ".oss-backupd-config.json";
     },
     "host": "",
     "encrypt_pubkey_file": "",
+    "backup_count": 10,
     "items": [
         {
             "oss_config": null, // OPT @oss_config
             "target": "",
             "file_name": "",
-            "encrypt_pubkey_file": null // OPT @encrypt_pubkey_file
+            "encrypt_pubkey_file": null, // OPT @encrypt_pubkey_file
+            "backup_count": 8
         }
     ]
 }
diff --git a/src/zip_util.rs b/src/zip_util.rs
index e84dede..4efe3f9 100644
--- a/src/zip_util.rs
+++ b/src/zip_util.rs
@@ -72,10 +72,7 @@ pub fn zip_file(target: &str, zip_file: &str) -> XResult<()> {
 
 pub fn get_file_name(path: &Path) -> String {
     match path.file_name() {
-        None => "no_file_name".to_string(),
-        Some(f) => match f.to_os_string().into_string().ok() {
-            None => "unknown_file_name".to_string(),
-            Some(f) => f,
-        },
+        None => "no_file_name".to_owned(),
+        Some(f) => f.to_os_string().into_string().unwrap_or("unknown_file_name".to_owned()),
     }
 }
\ No newline at end of file