int ShowDefaultQuota(); /* show or change system default quota. */
int ChangeDefaultQuota();
-int ShowUserQuota(); /* modify a user's quota. */
-int ChangeUserQuota();
-int AddUserQuota();
-int RemoveUserQuota();
+int GetQuota(); /* modify a user's quota. */
+int GetQuotaByFilesys();
+int AddQuota();
+int UpdateQuota();
+int DeleteQuota();
/* user.c */