From 79e0379a7573e998d52ea42242ea0cc96fa81738 Mon Sep 17 00:00:00 2001
From: usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 4 Jan 2012 02:33:37 +0000
Subject: * win32/win32.c (check_valid_dir): special case for a root directory.
   Reported by Masateru OKAMOTO at [Bug #5819].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34205 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 win32/win32.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

(limited to 'win32')

diff --git a/win32/win32.c b/win32/win32.c
index 79df655e43..62c3076d73 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -4475,7 +4475,20 @@ static int
 check_valid_dir(const WCHAR *path)
 {
     WIN32_FIND_DATAW fd;
-    HANDLE fh = open_dir_handle(path, &fd);
+    HANDLE fh;
+    WCHAR full[MAX_PATH];
+    WCHAR *dmy;
+
+    /* if the specified path is the root of a drive and the drive is empty, */
+    /* FindFirstFile() returns INVALID_HANDLE_VALUE. */
+    if (!GetFullPathNameW(path, sizeof(full) / sizeof(WCHAR), full, &dmy)) {
+	errno = map_errno(GetLastError());
+	return -1;
+    }
+    if (GetDriveTypeW(full) != DRIVE_NO_ROOT_DIR)
+	return 0;
+
+    fh = open_dir_handle(path, &fd);
     if (fh == INVALID_HANDLE_VALUE)
 	return -1;
     FindClose(fh);
-- 
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