diff --git a/src/config_util.rs b/src/config_util.rs
index 8f66b7d..73d35a7 100644
--- a/src/config_util.rs
+++ b/src/config_util.rs
@@ -125,10 +125,6 @@ fn real_make_oss_key(oss_backupd_config: &OSSBackupdConfig, oss_backupd_config_i
     key
 }
 
-pub fn get_now_ymdhms() -> String {
-    Utc::now().format("%Y%m%d_%H%M%S").to_string()
-}
-
 pub fn remove_start_end_slash(s: &str) -> String {
     let mut ss = s;
     while ss.starts_with("/") {
@@ -193,7 +189,6 @@ fn parse_oss_backupd_config_item(item: &json::JsonValue, root_oss_config_object:
         }
     }
 
-
     if encrypt_pubkey_file.is_none() && root_encrypt_pubkey_file.is_some() {
         encrypt_pubkey_file = root_encrypt_pubkey_file.clone();
     }
@@ -326,13 +321,14 @@ fn get_config_content(custom_oss_backupd_config: Option<&str>, verbose: bool) ->
 fn get_user_home() -> XResult<String> {
     match dirs::home_dir() {
          None => Err(new_box_ioerror("Home dir not found!")),
-         Some(home_dir_o) => match home_dir_o.to_str() {
-             None => Err(new_box_ioerror("Home dir not found!")),
-             Some(home_dir_str) => Ok(home_dir_str.to_owned()),
-         },
+         Some(home_dir) => home_dir.to_str().map(|h| h.to_owned()).ok_or(new_box_ioerror("Home dir not found!")),
      }
  }
  
  fn get_user_home_dir(dir: &str) -> XResult<String> {
      Ok(format!("{}/{}", get_user_home()?, dir))
  }
+
+fn get_now_ymdhms() -> String {
+    Utc::now().format("%Y%m%d_%H%M%S").to_string()
+}