From 84f9c83b7ebc472585fda69371c8c6050c74ec8c Mon Sep 17 00:00:00 2001
From: Yerden Zhumabekov <yerden.zhumabekov@gmail.com>
Date: Wed, 2 Sep 2020 10:25:49 +0600
Subject: [PATCH] mem: fix Write setting wrong offset

Signed-off-by: Yerden Zhumabekov <yerden.zhumabekov@gmail.com>
---
 mem/file.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mem/file.go b/mem/file.go
index ae667e8..07b2e12 100644
--- a/mem/file.go
+++ b/mem/file.go
@@ -260,7 +260,7 @@ func (f *File) Write(b []byte) (n int, err error) {
 	}
 	setModTime(f.fileData, time.Now())
 
-	atomic.StoreInt64(&f.at, int64(len(f.fileData.data)))
+	atomic.AddInt64(&f.at, int64(n))
 	return
 }