From 4a2c1c5a95ebd1bb2de4380167422a1d30c72ec2 Mon Sep 17 00:00:00 2001
From: Andrew Schwartzmeyer <andschwa@microsoft.com>
Date: Wed, 22 Jul 2015 15:10:44 -0700
Subject: [PATCH] Set lpnSize when insufficient

---
 impl/getusername.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/impl/getusername.cpp b/impl/getusername.cpp
index f9c73280a..203ed5e7e 100644
--- a/impl/getusername.cpp
+++ b/impl/getusername.cpp
@@ -80,6 +80,7 @@ BOOL GetUserName(WCHAR_T *lpBuffer, LPDWORD lpnSize)
 
 	if (output.size()/2 + 1 > *lpnSize) {
 		errno = ERROR_INSUFFICIENT_BUFFER;
+		*lpnSize = output.size()/2 + 1;
 		return 0;
 	}