From 1f7683bfcbecbeffa802a1c361e1842db2fff4f8 Mon Sep 17 00:00:00 2001
From: Bastien Nocera <hadess@hadess.net>
Date: Wed, 25 Jun 2014 17:25:50 +0200
Subject: [PATCH 8/8] Disable fdatasync() usage if PKGSYSTEM_ENABLE_FSYNC is
 set

If the PKGSYSTEM_ENABLE_FSYNC envvar is set to a non-zero value,
the fdatasync() call will be skipped, at the expense of data integrity.

https://bugs.freedesktop.org/show_bug.cgi?id=70366
---
 update-mime-database.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/update-mime-database.c b/update-mime-database.c
index c1a6f9f..894ac97 100644
--- a/update-mime-database.c
+++ b/update-mime-database.c
@@ -936,11 +936,25 @@ set_error_from_errno (GError **error)
 			    g_strerror(errsv));
 }
 
+static gboolean
+sync_enabled(void)
+{
+	const char *env;
+
+	env = g_getenv("PKGSYSTEM_ENABLE_FSYNC");
+	if (!env)
+		return TRUE;
+	return atoi(env);
+}
+
 static int
 sync_file(const gchar *pathname, GError **error)
 {
 	int fd;
 
+	if (!sync_enabled())
+		return 0;
+
 #ifdef HAVE_FDATASYNC
 	fd = open(pathname, O_RDWR);
 	if (fd == -1)
-- 
1.9.3