From 90a1e6abbd3d9fd2aff6dfc7bcd1f2f602ee72f6 Mon Sep 17 00:00:00 2001
From: Rusty Bird <rustybird@openmailbox.org>
Date: Fri, 16 Jun 2017 16:13:44 +0000
Subject: [PATCH] Fall back to sync() if syncfs() is unavailable

It seems better to err on the side of safety (vs. performance).
---
 qrexec-lib/unpack.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/qrexec-lib/unpack.c b/qrexec-lib/unpack.c
index 4d3acf5..c7513e8 100644
--- a/qrexec-lib/unpack.c
+++ b/qrexec-lib/unpack.c
@@ -237,6 +237,8 @@ int do_unpack(void)
     cwd_fd = open(".", O_RDONLY);
     if (cwd_fd >= 0 && syncfs(cwd_fd) == 0 && close(cwd_fd) == 0)
         errno = saved_errno;
+#else
+    sync();
 #endif
 
     send_status_and_crc(errno, untrusted_namebuf);