From 46cf7c5fd6768f94d8938458668672a54d710f6d Mon Sep 17 00:00:00 2001
From: NAKAMURA Takumi <geek4civic@gmail.com>
Date: Wed, 10 Nov 2010 08:37:47 +0000
Subject: [PATCH] Win32/Process.inc: [PR8527]
 Process::FileDescriptorIsDisplayed(fd) should not check by FILE_TYPE_CHAR. It
 must be better to check it with Console API.

The special file "NUL" is FILE_TYPE_CHAR with GetFileType(h). It was treated as display device and discarding output to NUL had failed. (eg. opt -o nul)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118678 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/System/Win32/Process.inc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/System/Win32/Process.inc b/lib/System/Win32/Process.inc
index feb0806116e..15b41f00eaf 100644
--- a/lib/System/Win32/Process.inc
+++ b/lib/System/Win32/Process.inc
@@ -132,7 +132,8 @@ bool Process::StandardErrIsDisplayed() {
 }
 
 bool Process::FileDescriptorIsDisplayed(int fd) {
-  return GetFileType((HANDLE)_get_osfhandle(fd)) == FILE_TYPE_CHAR;
+  DWORD Mode;	// Unused
+  return (GetConsoleMode((HANDLE)_get_osfhandle(fd), &Mode) != 0);
 }
 
 unsigned Process::StandardOutColumns() {