diff --git a/easylogger/plugins/file/elog_file.c b/easylogger/plugins/file/elog_file.c
index e028e50..9db0867 100644
--- a/easylogger/plugins/file/elog_file.c
+++ b/easylogger/plugins/file/elog_file.c
@@ -34,33 +34,31 @@
 
 #include <file/elog_file.h>
 #include <file/elog_file_cfg.h>
+
 /* initialize OK flag */
 static bool init_ok = false;
-static FILE *fp;
-static int fd;
-static Elog_File_Cfg file;
-
-static void elog_file_config_init(Elog_File_Cfg *file);
+static FILE *fp = NULL;
+static int fd = -1;
+static ElogFileCfg local_cfg;
 
-ElogErrCode elog_file_init(void) 
+ElogErrCode elog_file_init(void)
 {
     ElogErrCode result = ELOG_NO_ERR;
+    ElogFileCfg cfg;
+
     if (init_ok)
         goto __exit;
 
-    elog_file_config_init(&file);
+    elog_file_port_init();
 
-    fp = fopen(file.name, "a+");
-    if (fp)
-        fd = fileno(fp);
-    else
-        fd = -1;
+    cfg.name = ELOG_FILE_NAME;
+    cfg.max_size = ELOG_FILE_MAX_SIZE;
 
-    elog_file_port_init();
+    elog_file_config(&cfg);
 
     init_ok = true;
 __exit:
-    return result;	
+    return result;
 }
 
 void elog_file_write(const char *log, size_t size)
@@ -72,17 +70,17 @@ void elog_file_write(const char *log, size_t size)
     statbuf.st_size = 0;
     fstat(fd, &statbuf);
 
-
-    if (unlikely(statbuf.st_size > file.max_size))
-        return ;
+    if (unlikely(statbuf.st_size > local_cfg.max_size))
+        return;
 
     elog_file_port_lock();
 
     fwrite(log, size, 1, fp);
+
 #ifdef ELOG_FILE_FLUSH_CAHCE_ENABLE
     fflush(fp);
     fsync(fd);
-#endif 
+#endif
 
     elog_file_port_unlock();
 }
@@ -95,8 +93,22 @@ void elog_file_deinit(void)
     fclose(fp);
 }
 
-static void elog_file_config_init(Elog_File_Cfg *file)
+void elog_file_config(ElogFileCfg *cfg)
 {
-    file->name = ELOG_FILE_NAME;
-    file->max_size = ELOG_FILE_MAX_SIZE;
+    if (fp) {
+        fclose(fp);
+    }
+
+    elog_file_port_lock();
+
+    local_cfg.name = cfg->name;
+    local_cfg.max_size = cfg->max_size;
+
+    fp = fopen(local_cfg.name, "a+");
+    if (fp)
+        fd = fileno(fp);
+    else
+        fd = -1;
+
+    elog_file_port_unlock();
 }
diff --git a/easylogger/plugins/file/elog_file.h b/easylogger/plugins/file/elog_file.h
index 4ed1b32..03c9fdc 100644
--- a/easylogger/plugins/file/elog_file.h
+++ b/easylogger/plugins/file/elog_file.h
@@ -28,6 +28,7 @@
 
 #ifndef __ELOG_FILE__H__
 #define __ELOG_FILE__H__
+
 #include <stdio.h>
 #include <elog.h>
 
@@ -35,7 +36,7 @@
 extern "C" {
 #endif
 
-/* EasyLogger file log plugin's software version number */  
+/* EasyLogger file log plugin's software version number */
 #define ELOG_FILE_SW_VERSION                "V1.0.0"
 #ifdef linux
 #define likely(x) __builtin_expect(!!(x), 1)
@@ -46,13 +47,14 @@ extern "C" {
 #endif
 
 typedef struct {
-    char *name;/* file name */
-    size_t max_size;/* file max size */
-} Elog_File_Cfg;
+    char *name;              /* file name */
+    size_t max_size;         /* file max size */
+} ElogFileCfg;
 
 /* elog_file.c */
 ElogErrCode elog_file_init(void);
 void elog_file_write(const char *log, size_t size);
+void elog_file_config(ElogFileCfg *cfg);
 void elog_file_deinit(void);
 
 /* elog_file_port.c */
diff --git a/easylogger/plugins/file/elog_file_cfg.h b/easylogger/plugins/file/elog_file_cfg.h
index 0dd75c9..c1d6973 100644
--- a/easylogger/plugins/file/elog_file_cfg.h
+++ b/easylogger/plugins/file/elog_file_cfg.h
@@ -30,9 +30,9 @@
 #define _ELOG_FILE_CFG_H_
 
 /* EasyLogger file log plugin's using file name */
-#define ELOG_FILE_NAME
+#define ELOG_FILE_NAME                 /* @note you must define it for a value */
 
 /* EasyLogger file log plugin's using file max size */
-#define ELOG_FILE_MAX_SIZE
+#define ELOG_FILE_MAX_SIZE             /* @note you must define it for a value */
 
 #endif /* _ELOG_FILE_CFG_H_ */
diff --git a/easylogger/plugins/file/elog_file_port.c b/easylogger/plugins/file/elog_file_port.c
index 2342df4..8ae77d6 100644
--- a/easylogger/plugins/file/elog_file_port.c
+++ b/easylogger/plugins/file/elog_file_port.c
@@ -38,28 +38,8 @@ ElogErrCode elog_file_port_init(void)
     ElogErrCode result = ELOG_NO_ERR;
 
     /* add your code here */
-    
-    return result;
-}
-
-/**
- * flush file cache 
- */
-void elog_file_port_flush_cache(Elog_File *file) {
-
-    /* add your code here */
-
-}
 
-/**
- * get file current size 
- */
-size_t elog_file_port_get_size(Elog_File *file)
-{
-
-    /* add your code here */
-
-    return 0;   
+    return result;
 }
 
 /**
@@ -79,6 +59,7 @@ void elog_file_port_unlock(void) {
     /* add your code here */
 
 }
+
 /**
  * file log deinit
  */