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diff --git a/StdLibPrivateInternalFiles/Include/MainData.h b/StdLibPrivateInternalFiles/Include/MainData.h
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+++ b/StdLibPrivateInternalFiles/Include/MainData.h
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+/** @file
+  Global data for the program environment.
+
+  Copyright (c) 2010, 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 that accompanies this distribution.
+  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php.
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+**/
+#include  <Uefi.h>
+#include  <Library/ShellLib.h>
+
+#include  <limits.h>
+#include  <signal.h>
+#include  <stdlib.h>
+#include  <stdio.h>
+#include  <time.h>
+#include  "Efi/Console.h"
+
+/* ##################  Type Declarations  ################################# */
+
+/** The type of an atexit handler function. **/
+typedef void            __xithandler_t(void);
+
+/* ##################  Global Declarations  ############################### */
+#ifndef TYPE_BIT
+#define TYPE_BIT(type)  (sizeof (type) * CHAR_BIT)
+#endif /* !defined TYPE_BIT */
+
+#ifndef TYPE_SIGNED
+#define TYPE_SIGNED(type) (((type) -1) < 0)
+#endif /* !defined TYPE_SIGNED */
+
+#ifndef INT_STRLEN_MAXIMUM
+/*
+** 302 / 1000 is log10(2.0) rounded up.
+** Subtract one for the sign bit if the type is signed;
+** add one for integer division truncation;
+** add one more for a minus sign if the type is signed.
+*/
+#define INT_STRLEN_MAXIMUM(type) \
+((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + TYPE_SIGNED(type))
+#endif /* !defined INT_STRLEN_MAXIMUM */
+
+/*
+** Big enough for something such as
+** ??? ???-2147483648 -2147483648:-2147483648:-2147483648 -2147483648\n
+** (two three-character abbreviations, five strings denoting integers,
+** three explicit spaces, two explicit colons, a newline,
+** and a trailing ASCII nul).
+*/
+#define ASCTIME_BUFLEN  (3 * 2 + 5 * INT_STRLEN_MAXIMUM(int) + 3 + 2 + 1 + 1)
+
+struct  __filedes {
+  EFI_FILE_HANDLE   FileHandle;
+  UINT32            State;        // In use if non-zero
+  int               Oflags;       // From the open call
+  int               Omode;        // From the open call
+  int               RefCount;     // Reference count of opens
+  int               SocProc;      // Placeholder: socket owner process or process group.
+  UINT16            MyFD;         // Which FD this is.
+};
+
+struct  __MainData {
+  // File descriptors
+  struct __filedes  fdarray[OPEN_MAX];
+  // Low-level File abstractions for the stdin, stdout, stderr streams
+  ConInstance       StdIo[3];
+
+  // Signal Handlers
+  __sighandler_t    *sigarray[SIG_LAST];      // Pointers to signal handlers
+
+  void (*cleanup)(void);   // Cleanup Function Pointer
+
+  __xithandler_t   *atexit_handler[ATEXIT_MAX];  // Array of handlers for atexit.
+  clock_t           AppStartTime;                // Set in Main.c and used for time.h
+  clock_t           ClocksPerSecond;             // Set in Main.c and used for time.h
+  int               num_atexit;                  ///< Number of registered atexit handlers.
+
+  CHAR16            UString[UNICODE_STRING_MAX];
+  struct tm         BDTime;                       // Broken-down time structure for localtime.
+  EFI_TIME          TimeBuffer;                   // Used by <time.h>mk
+  char              ASgetenv[ASCII_STRING_MAX];   // Only modified by getenv
+  char              ASasctime[ASCTIME_BUFLEN];    // Only modified by asctime
+
+  BOOLEAN         aborting;                       // Ensures cleanup function only called once when aborting.
+};
+
+extern struct  __MainData  *gMD;