From 087f48cc728a532103a50c22e014faf912d05d02 Mon Sep 17 00:00:00 2001
From: Aaron Jacobs <jacobsa@google.com>
Date: Fri, 6 Mar 2015 05:27:04 +1100
Subject: [PATCH] Update mtime on write.

---
 samples/memfs/inode.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/samples/memfs/inode.go b/samples/memfs/inode.go
index 477182c..3561a36 100644
--- a/samples/memfs/inode.go
+++ b/samples/memfs/inode.go
@@ -344,6 +344,9 @@ func (inode *inode) WriteAt(p []byte, off int64) (n int, err error) {
 		panic("WriteAt called on directory.")
 	}
 
+	// Update the modification time.
+	inode.attributes.Mtime = inode.clock.Now()
+
 	// Ensure that the contents slice is long enough.
 	newLen := int(off) + len(p)
 	if len(inode.contents) < newLen {