[PATCH] ShellPkg: Expand special output file to include "NULL" and case insensitive

[Tapan Shah <tapandshah@hpe.com>]

As per ECR 1349 change in UEFI Shell Specification 2.2, expanding
a special output file name to include "NULL". Previously it only
supported "NUL" as a special output file and it was case sensitive.
With this change both "NUL" and "NULL" are special output file and
checked as case insensitive.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Tapan Shah <tapandshah@hpe.com>
---
 ShellPkg/Application/Shell/ShellParametersProtocol.c | 3 ++-
 ShellPkg/Application/Shell/ShellProtocol.c           | 6 ++++--
 ShellPkg/Library/UefiShellLib/UefiShellLib.c         | 5 ++++-
 ShellPkg/Library/UefiShellLib/UefiShellLib.h         | 2 ++
 4 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/ShellPkg/Application/Shell/ShellParametersProtocol.c b/ShellPkg/Application/Shell/ShellParametersProtocol.c
index 3684f9c..58156a2 100644
--- a/ShellPkg/Application/Shell/ShellParametersProtocol.c
+++ b/ShellPkg/Application/Shell/ShellParametersProtocol.c
@@ -2,6 +2,7 @@
   Member functions of EFI_SHELL_PARAMETERS_PROTOCOL and functions for creation,
   manipulation, and initialization of EFI_SHELL_PARAMETERS_PROTOCOL.
 
+  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
   Copyright (C) 2014, Red Hat, Inc.
   (C) Copyright 2013 Hewlett-Packard Development Company, L.P.<BR>
   Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>
@@ -1174,7 +1175,7 @@ UpdateStdInStdOutStdErr(
         if (TempHandle == NULL) {
           Status = EFI_INVALID_PARAMETER;
         } else {
-          if (StrStr(StdOutFileName, L"NUL")==StdOutFileName) {
+          if (gUnicodeCollation->MetaiMatch (gUnicodeCollation, StdOutFileName, L"NUL")) {
             //no-op
           } else if (!OutAppend && OutUnicode && !EFI_ERROR(Status)) {
             Status = WriteFileTag (TempHandle);
diff --git a/ShellPkg/Application/Shell/ShellProtocol.c b/ShellPkg/Application/Shell/ShellProtocol.c
index 6f29250..fb7dd84 100644
--- a/ShellPkg/Application/Shell/ShellProtocol.c
+++ b/ShellPkg/Application/Shell/ShellProtocol.c
@@ -3,6 +3,7 @@
   manipulation, and initialization of EFI_SHELL_PROTOCOL.
 
   (C) Copyright 2014 Hewlett-Packard Development Company, L.P.<BR>
+  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
   Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
@@ -1287,9 +1288,10 @@ EfiShellOpenFileByName(
   }
 
   //
-  // Is this for NUL file
+  // Is this for NUL / NULL file
   //
-  if (StrCmp(FileName, L"NUL") == 0) {
+  if ((gUnicodeCollation->StriColl (gUnicodeCollation, (CHAR16*)FileName, L"NUL") == 0) ||
+      (gUnicodeCollation->StriColl (gUnicodeCollation, (CHAR16*)FileName, L"NULL") == 0)) {
     *FileHandle = &FileInterfaceNulFile;
     return (EFI_SUCCESS);
   }
diff --git a/ShellPkg/Library/UefiShellLib/UefiShellLib.c b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
index 3dcdba6..27523e2 100644
--- a/ShellPkg/Library/UefiShellLib/UefiShellLib.c
+++ b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
@@ -1,6 +1,7 @@
 /** @file
   Provides interface to shell functionality for shell commands and applications.
 
+  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
   Copyright 2016 Dell Inc.
   Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
   This program and the accompanying materials
@@ -720,7 +721,9 @@ ShellOpenFileByName(
     Status = gEfiShellProtocol->OpenFileByName(FileName,
                                                FileHandle,
                                                OpenMode);
-    if (StrCmp(FileName, L"NUL") != 0 && !EFI_ERROR(Status) && ((OpenMode & EFI_FILE_MODE_CREATE) != 0)){
+    if ((gUnicodeCollation->StriColl (gUnicodeCollation, (CHAR16*)FileName, L"NUL") != 0) &&
+        (gUnicodeCollation->StriColl (gUnicodeCollation, (CHAR16*)FileName, L"NULL") != 0) &&
+         !EFI_ERROR(Status) && ((OpenMode & EFI_FILE_MODE_CREATE) != 0)){
       FileInfo = FileFunctionMap.GetFileInfo(*FileHandle);
       ASSERT(FileInfo != NULL);
       FileInfo->Attribute = Attributes;
diff --git a/ShellPkg/Library/UefiShellLib/UefiShellLib.h b/ShellPkg/Library/UefiShellLib/UefiShellLib.h
index 3596f7b..6903227 100644
--- a/ShellPkg/Library/UefiShellLib/UefiShellLib.h
+++ b/ShellPkg/Library/UefiShellLib/UefiShellLib.h
@@ -1,6 +1,7 @@
 /** @file
   Provides interface to shell functionality for shell commands and applications.
 
+  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
   Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
@@ -38,6 +39,7 @@
 #include <Library/UefiLib.h>
 #include <Library/HiiLib.h>
 #include <Library/ShellLib.h>
+#include <Library/ShellCommandLib.h>
 
 typedef struct  {
   EFI_SHELL_GET_FILE_INFO                   GetFileInfo;
-- 
1.9.5.msysgit.0