[glib: 3/7] W32: tighten access rights requested to read symlink

[LRN <ruslanizhb src gnome org>]

commit 256e74124821693c847b905dcbd70efae06c9809
Author: Руслан Ижбулатов <lrn1986 gmail com>
Date:   Thu Aug 16 10:06:33 2018 +0000

    W32: tighten access rights requested to read symlink
    
    According to
    http://blog.kalmbach-software.de/2008/02/28/howto-correctly-read-reparse-data-in-vista/
    we only need FILE_READ_EA, and should also use wider share flags.

 glib/gstdio.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/glib/gstdio.c b/glib/gstdio.c
index 60266960a..1a56b1932 100644
--- a/glib/gstdio.c
+++ b/glib/gstdio.c
@@ -466,8 +466,9 @@ _g_win32_readlink_utf16_raw (const gunichar2 *filename,
    * point and use DeviceIoControl() on it.
    */
   h = CreateFileW (filename,
-                   FILE_READ_ATTRIBUTES | SYNCHRONIZE | GENERIC_READ,
-                   FILE_SHARE_READ, NULL, OPEN_EXISTING,
+                   FILE_READ_EA,
+                   FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
+                   NULL, OPEN_EXISTING,
                    FILE_ATTRIBUTE_NORMAL
                    | FILE_FLAG_OPEN_REPARSE_POINT
                    | (attributes & FILE_ATTRIBUTE_DIRECTORY ? FILE_FLAG_BACKUP_SEMANTICS : 0),