From 58a4150dd6b3eb71a358b4e73e2aac4e36b0cc5a Mon Sep 17 00:00:00 2001
From: Christian Schuerer-Waldheim <csw@gmx.at>
Date: Tue, 13 Dec 2016 18:28:40 +0100
Subject: [PATCH] Return proper UNC prefix for server paths (\\server\share\).
 This fixes #2167, but restore view needs fixing (NullReferenceException in
 SearchFiles()).

---
 Duplicati/Library/Snapshots/SystemIOWindows.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Duplicati/Library/Snapshots/SystemIOWindows.cs b/Duplicati/Library/Snapshots/SystemIOWindows.cs
index c4b3cc44c..675c9f48b 100644
--- a/Duplicati/Library/Snapshots/SystemIOWindows.cs
+++ b/Duplicati/Library/Snapshots/SystemIOWindows.cs
@@ -40,7 +40,10 @@ namespace Duplicati.Library.Snapshots
         public static string PrefixWithUNC(string path)
         {
             if (!path.StartsWith(UNCPREFIX))
-                return UNCPREFIX + path;
+                if (!path.StartsWith(@"\\"))
+                    return UNCPREFIX + path;
+                else
+                    return @"\\?\UNC" + path.Remove(0,1);
             else
                 return path;
         }