[pschweitzer] 75443: [KERNEL32] In case of synchronous read, it's legit for the FSD to notify EOF by returning success & zero read length. It fixes never ending reads when copying a file from NFS t...

Author: pschweitzer
Date: Sun Jul 30 08:31:59 2017
New Revision: 75443

URL: http://svn.reactos.org/svn/reactos?rev=75443&view=rev
Log:
[KERNEL32]
In case of synchronous read, it's legit for the FSD to notify EOF by returning success & zero read length.
It fixes never ending reads when copying a file from NFS to local disk.

CORE-8204
CORE-11327
CORE-13484

Modified:
    trunk/reactos/dll/win32/kernel32/client/file/copy.c

Modified: trunk/reactos/dll/win32/kernel32/client/file/copy.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/client/f...
==============================================================================
--- trunk/reactos/dll/win32/kernel32/client/file/copy.c	[iso-8859-1] (original)
+++ trunk/reactos/dll/win32/kernel32/client/file/copy.c	[iso-8859-1] Sun Jul 30 08:31:59 2017
@@ -101,6 +101,13 @@
                                      RegionSize,
                                      NULL,
                                      NULL);
+                /* With sync read, 0 length + status success mean EOF:
+                 * https://msdn.microsoft.com/en-us/library/windows/desktop/aa365467(v=vs.85).a...
+                 */
+                if (NT_SUCCESS(errCode) && IoStatusBlock.Information == 0)
+                {
+                    errCode = STATUS_END_OF_FILE;
+                }
                 if (NT_SUCCESS(errCode) && (NULL == pbCancel || ! *pbCancel))
                 {
                     errCode = NtWriteFile(FileHandleDest,