From 979405373d872ed08238f279453561c131963264 Mon Sep 17 00:00:00 2001
From: Jef Poskanzer <jef@mail.acme.com>
Date: Mon, 25 Nov 2013 09:57:50 -0800
Subject: [PATCH] When receiving a disk file with the -F flag, do an fsync()
 after each write().

---
 src/iperf_api.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/iperf_api.c b/src/iperf_api.c
index 48a8b37..e92fc9e 100644
--- a/src/iperf_api.c
+++ b/src/iperf_api.c
@@ -2105,8 +2105,10 @@ diskfile_recv(struct iperf_stream *sp)
     int r;
 
     r = sp->rcv2(sp);
-    if (r > 0)
+    if (r > 0) {
 	(void) write(sp->diskfile_fd, sp->buffer, r);
+	(void) fsync(sp->diskfile_fd);
+    }
     return r;
 }