--- a/src/core/ngx_log.h
+++ b/src/core/ngx_log.h
@@ -43,6 +43,8 @@
 
 
 typedef u_char *(*ngx_log_handler_pt) (ngx_log_t *log, u_char *buf, size_t len);
+typedef void (*ngx_log_writer_pt) (ngx_log_t *log, ngx_uint_t level,
+    u_char *buf, size_t len);
 
 
 struct ngx_log_s {
@@ -54,6 +56,9 @@ struct ngx_log_s {
     ngx_log_handler_pt   handler;
     void                *data;
 
+    ngx_log_writer_pt    writer;
+    void                *wdata;
+
     /*
      * we declare "action" as "char *" because the actions are usually
      * the static strings and in the "u_char *" case we have to override
@@ -227,6 +232,7 @@ void ngx_cdecl ngx_log_stderr(ngx_err_t 
 u_char *ngx_log_errno(u_char *buf, u_char *last, ngx_err_t err);
 ngx_int_t ngx_log_open_default(ngx_cycle_t *cycle);
 ngx_int_t ngx_log_redirect_stderr(ngx_cycle_t *cycle);
+ngx_log_t *ngx_log_get_file_log(ngx_log_t *head);
 char *ngx_log_set_log(ngx_conf_t *cf, ngx_log_t **head);