From 947f2a4edeb071daf34ad925450d504c826db739 Mon Sep 17 00:00:00 2001
From: fang <fpang@taosdata.com>
Date: Sat, 4 Jan 2020 16:16:10 +0800
Subject: [PATCH] return if fail to open file, otherwise coredump

---
 src/kit/taosdemo/taosdemo.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/kit/taosdemo/taosdemo.c b/src/kit/taosdemo/taosdemo.c
index c8d8c8b653..6eb8426e58 100644
--- a/src/kit/taosdemo/taosdemo.c
+++ b/src/kit/taosdemo/taosdemo.c
@@ -351,6 +351,11 @@ int main(int argc, char *argv[]) {
   }
 
   FILE *fp = fopen(arguments.output_file, "a");
+  if (NULL == fp) {
+    fprintf(stderr, "Failed to open %s for writing\n", arguments.output_file);
+    return 1;
+  };
+  
   time_t tTime = time(NULL);
   struct tm tm = *localtime(&tTime);
 
-- 
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