From b2007beeb0203c8f9f3d6d07329d0d1fceea91c7 Mon Sep 17 00:00:00 2001
From: Matt Johnston <matt@ucc.asn.au>
Date: Fri, 18 Oct 2019 23:48:16 +0800
Subject: [PATCH] bring back fsync_parent_dir

---
 gensignkey.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gensignkey.c b/gensignkey.c
index 8317feaf1..34b6f5a29 100644
--- a/gensignkey.c
+++ b/gensignkey.c
@@ -152,6 +152,10 @@ int signkey_generate(enum signkey_type keytype, int bits, const char* filename,
 		}
 	}
 
+	/* ensure directory update is flushed to disk, otherwise we can end up
+	with zero-byte hostkey files if the power goes off */
+	fsync_parent_dir(filename);
+
 out:
 	if (buf) {
 		buf_burn(buf);