From 459488bcf8619601061954507fc2d70d24a9db42 Mon Sep 17 00:00:00 2001
From: "Michael.Ma" <wnpllr@gmail.com>
Date: Wed, 8 Jan 2020 17:54:06 +0800
Subject: [PATCH] fix logrotate empty file hole issue (#1561)

* fix logrotate empty file hole issue
refer to https://github.com/ossrs/srs/issues/1554
---
 trunk/src/app/srs_app_log.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/trunk/src/app/srs_app_log.cpp b/trunk/src/app/srs_app_log.cpp
index 67f26930b..1c0a5dfd1 100644
--- a/trunk/src/app/srs_app_log.cpp
+++ b/trunk/src/app/srs_app_log.cpp
@@ -414,7 +414,7 @@ void SrsFastLog::open_log_file()
     
     if(fd == -1 && errno == ENOENT) {
         fd = open(filename.c_str(), 
-            O_RDWR | O_CREAT | O_TRUNC, 
+            O_RDWR | O_CREAT | O_TRUNC | O_APPEND/*logrotate copytruncate need this flag*/, 
             S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH
         );
     }