Can we do a GIT move operation and then merge the content from ShellBase.h 
please?  I do not want to lose the file history information.

When we move by "delete" then "add" we lose everything for no reason.  

-Jaben

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-boun...@lists.01.org] On Behalf Of
> Ruiyu Ni
> Sent: Friday, October 14, 2016 2:44 AM
> To: edk2-devel@lists.01.org
> Cc: Carsey, Jaben <jaben.car...@intel.com>; Kinney, Michael D
> <michael.d.kin...@intel.com>; Yao, Jiewen <jiewen....@intel.com>
> Subject: [edk2] [PATCH 2/5] MdePkg: Include
> Shell/ShellDynamicCommand/ShellParameters definitions
> Importance: High
> 
> Copy Shell/ShellDynamicCommand/ShellParameters definitions from
> ShellPkg to MdePkg.
> Content of ShellBase.h is moved to Protocol/Shell.h.
> 
> The following patches will update ShellPkg to reference all protocol
> definition to MdePkg.
> 
> Contributed-under: TianoCore Contribution Agreement 1.0
> Signed-off-by: Ruiyu Ni <ruiyu...@intel.com>
> Cc: Jaben Carsey <jaben.car...@intel.com>
> Cc: Jiewen Yao <jiewen....@intel.com>
> Cc: Michael D Kinney <michael.d.kin...@intel.com>
> ---
>  MdePkg/Include/Protocol/Shell.h               | 1268
> +++++++++++++++++++++++++
>  MdePkg/Include/Protocol/ShellDynamicCommand.h |   85 ++
>  MdePkg/Include/Protocol/ShellParameters.h     |   60 ++
>  MdePkg/MdePkg.dec                             |   15 +
>  4 files changed, 1428 insertions(+)
>  create mode 100644 MdePkg/Include/Protocol/Shell.h
>  create mode 100644 MdePkg/Include/Protocol/ShellDynamicCommand.h
>  create mode 100644 MdePkg/Include/Protocol/ShellParameters.h
> 
> diff --git a/MdePkg/Include/Protocol/Shell.h
> b/MdePkg/Include/Protocol/Shell.h
> new file mode 100644
> index 0000000..cc1fbdc
> --- /dev/null
> +++ b/MdePkg/Include/Protocol/Shell.h
> @@ -0,0 +1,1268 @@
> +/** @file
> +  EFI Shell protocol as defined in the UEFI Shell 2.0 specification including
> errata.
> +
> +  (C) Copyright 2014 Hewlett-Packard Development Company, L.P.<BR>
> +  Copyright (c) 2006 - 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
> +  which 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.
> +
> +**/
> +
> +#ifndef __EFI_SHELL_PROTOCOL__
> +#define __EFI_SHELL_PROTOCOL__
> +
> +#include <Guid/FileInfo.h>
> +
> +#define EFI_SHELL_PROTOCOL_GUID \
> +  { \
> +  0x6302d008, 0x7f9b, 0x4f30, { 0x87, 0xac, 0x60, 0xc9, 0xfe, 0xf5, 0xda, 
> 0x4e
> } \
> +  }
> +typedef VOID *SHELL_FILE_HANDLE;
> +
> +typedef enum {
> +  ///
> +  /// The operation completed successfully.
> +  ///
> +  SHELL_SUCCESS               = 0,
> +
> +  ///
> +  /// The image failed to load.
> +  ///
> +  SHELL_LOAD_ERROR            = 1,
> +
> +  ///
> +  /// The parameter was incorrect.
> +  ///
> +  SHELL_INVALID_PARAMETER     = 2,
> +
> +  ///
> +  /// The operation is not supported.
> +  ///
> +  SHELL_UNSUPPORTED           = 3,
> +
> +  ///
> +  /// The buffer was not the proper size for the request.
> +  ///
> +  SHELL_BAD_BUFFER_SIZE       = 4,
> +
> +  ///
> +  /// The buffer was not large enough to hold the requested data.
> +  /// The required buffer size is returned in the appropriate
> +  /// parameter when this error occurs.
> +  ///
> +  SHELL_BUFFER_TOO_SMALL      = 5,
> +
> +  ///
> +  /// There is no data pending upon return.
> +  ///
> +  SHELL_NOT_READY             = 6,
> +
> +  ///
> +  /// The physical device reported an error while attempting the
> +  /// operation.
> +  ///
> +  SHELL_DEVICE_ERROR          = 7,
> +
> +  ///
> +  /// The device cannot be written to.
> +  ///
> +  SHELL_WRITE_PROTECTED       = 8,
> +
> +  ///
> +  /// The resource has run out.
> +  ///
> +  SHELL_OUT_OF_RESOURCES      = 9,
> +
> +  ///
> +  /// An inconsistency was detected on the file system causing the
> +  /// operation to fail.
> +  ///
> +  SHELL_VOLUME_CORRUPTED      = 10,
> +
> +  ///
> +  /// There is no more space on the file system.
> +  ///
> +  SHELL_VOLUME_FULL           = 11,
> +
> +  ///
> +  /// The device does not contain any medium to perform the
> +  /// operation.
> +  ///
> +  SHELL_NO_MEDIA              = 12,
> +
> +  ///
> +  /// The medium in the device has changed since the last
> +  /// access.
> +  ///
> +  SHELL_MEDIA_CHANGED         = 13,
> +
> +  ///
> +  /// The item was not found.
> +  ///
> +  SHELL_NOT_FOUND             = 14,
> +
> +  ///
> +  /// Access was denied.
> +  ///
> +  SHELL_ACCESS_DENIED         = 15,
> +
> +  // note the skipping of 16 and 17
> +
> +  ///
> +  /// A timeout time expired.
> +  ///
> +  SHELL_TIMEOUT               = 18,
> +
> +  ///
> +  /// The protocol has not been started.
> +  ///
> +  SHELL_NOT_STARTED           = 19,
> +
> +  ///
> +  /// The protocol has already been started.
> +  ///
> +  SHELL_ALREADY_STARTED       = 20,
> +
> +  ///
> +  /// The operation was aborted.
> +  ///
> +  SHELL_ABORTED               = 21,
> +
> +  // note the skipping of 22, 23, and 24
> +
> +  ///
> +  /// A function encountered an internal version that was
> +  /// incompatible with a version requested by the caller.
> +  ///
> +  SHELL_INCOMPATIBLE_VERSION  = 25,
> +
> +  ///
> +  /// The function was not performed due to a security violation.
> +  ///
> +  SHELL_SECURITY_VIOLATION    = 26,
> +
> +  ///
> +  /// The function was performed and resulted in an unequal
> +  /// comparison..
> +  ///
> +  SHELL_NOT_EQUAL             = 27
> +} SHELL_STATUS;
> +
> +
> +// replaced EFI_LIST_ENTRY with LIST_ENTRY for simplicity.
> +// they are identical outside of the name.
> +typedef struct {
> +  LIST_ENTRY        Link;       ///< Linked list members.
> +  EFI_STATUS        Status;     ///< Status of opening the file.  Valid only 
> if
> Handle != NULL.
> +  CONST CHAR16      *FullName;  ///< Fully qualified filename.
> +  CONST CHAR16      *FileName;  ///< name of this file.
> +  SHELL_FILE_HANDLE Handle;     ///< Handle for interacting with the opened
> file or NULL if closed.
> +  EFI_FILE_INFO     *Info;      ///< Pointer to the FileInfo struct for this 
> file or
> NULL.
> +} EFI_SHELL_FILE_INFO;
> +
> +/**
> +  Returns whether any script files are currently being processed.
> +
> +  @retval TRUE                 There is at least one script file active.
> +  @retval FALSE                No script files are active now.
> +
> +**/
> +typedef
> +BOOLEAN
> +(EFIAPI *EFI_SHELL_BATCH_IS_ACTIVE) (
> +  VOID
> +  );
> +
> +/**
> +  Closes the file handle.
> +
> +  This function closes a specified file handle. All 'dirty' cached file data 
> is
> +  flushed to the device, and the file is closed. In all cases, the handle is
> +  closed.
> +
> +  @param[in] FileHandle         The file handle to be closed.
> +
> +  @retval EFI_SUCCESS           The file closed sucessfully.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_CLOSE_FILE)(
> +  IN SHELL_FILE_HANDLE FileHandle
> +  );
> +
> +/**
> +  Creates a file or directory by name.
> +
> +  This function creates an empty new file or directory with the specified
> attributes and
> +  returns the new file's handle. If the file already exists and is read-only,
> then
> +  EFI_INVALID_PARAMETER will be returned.
> +
> +  If the file already existed, it is truncated and its attributes updated. 
> If the
> file is
> +  created successfully, the FileHandle is the file's handle, else, the 
> FileHandle
> is NULL.
> +
> +  If the file name begins with >v, then the file handle which is returned
> refers to the
> +  shell environment variable with the specified name. If the shell
> environment variable
> +  already exists and is non-volatile then EFI_INVALID_PARAMETER is
> returned.
> +
> +  @param[in] FileName           Pointer to NULL-terminated file path.
> +  @param[in] FileAttribs        The new file's attrbiutes.  The different
> attributes are
> +                                described in EFI_FILE_PROTOCOL.Open().
> +  @param[out] FileHandle        On return, points to the created file handle 
> or
> directory's handle.
> +
> +  @retval EFI_SUCCESS           The file was opened.  FileHandle points to 
> the
> new file's handle.
> +  @retval EFI_INVALID_PARAMETER One of the parameters has an invalid
> value.
> +  @retval EFI_UNSUPPORTED       The file path could not be opened.
> +  @retval EFI_NOT_FOUND         The specified file could not be found on the
> device, or could not
> +                                file the file system on the device.
> +  @retval EFI_NO_MEDIA          The device has no medium.
> +  @retval EFI_MEDIA_CHANGED     The device has a different medium in it
> or the medium is no
> +                                longer supported.
> +  @retval EFI_DEVICE_ERROR      The device reported an error or can't get
> the file path according
> +                                the DirName.
> +  @retval EFI_VOLUME_CORRUPTED  The file system structures are
> corrupted.
> +  @retval EFI_WRITE_PROTECTED   An attempt was made to create a file, or
> open a file for write
> +                                when the media is write-protected.
> +  @retval EFI_ACCESS_DENIED     The service denied access to the file.
> +  @retval EFI_OUT_OF_RESOURCES  Not enough resources were available
> to open the file.
> +  @retval EFI_VOLUME_FULL       The volume is full.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_CREATE_FILE)(
> +  IN CONST CHAR16               *FileName,
> +  IN UINT64                     FileAttribs,
> +  OUT SHELL_FILE_HANDLE         *FileHandle
> +  );
> +
> +/**
> +  Deletes the file specified by the file handle.
> +
> +  This function closes and deletes a file. In all cases, the file handle is 
> closed.
> If the file
> +  cannot be deleted, the warning code EFI_WARN_DELETE_FAILURE is
> returned, but the
> +  handle is still closed.
> +
> +  @param[in] FileHandle           The file handle to delete.
> +
> +  @retval EFI_SUCCESS             The file was closed and deleted and the 
> handle
> was closed.
> +  @retval EFI_WARN_DELETE_FAILURE The handle was closed but the file
> was not deleted.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_DELETE_FILE)(
> +  IN SHELL_FILE_HANDLE FileHandle
> +  );
> +
> +/**
> +  Deletes the file specified by the file name.
> +
> +  This function deletes a file.
> +
> +  @param[in] FileName             Points to the NULL-terminated file name.
> +
> +  @retval EFI_SUCCESS             The file was deleted.
> +  @retval EFI_WARN_DELETE_FAILURE The handle was closed but the file
> was not deleted.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_DELETE_FILE_BY_NAME)(
> +  IN CONST CHAR16 *FileName
> +  );
> +
> +/**
> +  Disables the page break output mode.
> +**/
> +typedef
> +VOID
> +(EFIAPI *EFI_SHELL_DISABLE_PAGE_BREAK) (
> +  VOID
> +  );
> +
> +/**
> +  Enables the page break output mode.
> +**/
> +typedef
> +VOID
> +(EFIAPI *EFI_SHELL_ENABLE_PAGE_BREAK) (
> +  VOID
> +  );
> +
> +/**
> +  Execute the command line.
> +
> +  This function creates a nested instance of the shell and executes the
> specified
> +  command (CommandLine) with the specified environment (Environment).
> Upon return,
> +  the status code returned by the specified command is placed in
> StatusCode.
> +
> +  If Environment is NULL, then the current environment is used and all
> changes made
> +  by the commands executed will be reflected in the current environment. If
> the
> +  Environment is non-NULL, then the changes made will be discarded.
> +
> +  The CommandLine is executed from the current working directory on the
> current
> +  device.
> +
> +  @param[in] ParentImageHandle  A handle of the image that is executing
> the specified
> +                                command line.
> +  @param[in] CommandLine        Points to the NULL-terminated UCS-2
> encoded string
> +                                containing the command line. If NULL then 
> the command-
> +                                line will be empty.
> +  @param[in] Environment        Points to a NULL-terminated array of
> environment
> +                                variables with the format 'x=y', where x is 
> the
> +                                environment variable name and y is the 
> value. If this
> +                                is NULL, then the current shell environment 
> is used.
> +  @param[out] ErrorCode         Points to the status code returned by the
> command.
> +
> +  @retval EFI_SUCCESS           The command executed successfully. The
> status code
> +                                returned by the command is pointed to by 
> StatusCode.
> +  @retval EFI_INVALID_PARAMETER The parameters are invalid.
> +  @retval EFI_OUT_OF_RESOURCES  Out of resources.
> +  @retval EFI_UNSUPPORTED       Nested shell invocations are not allowed.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_EXECUTE) (
> +  IN EFI_HANDLE                 *ParentImageHandle,
> +  IN CHAR16                     *CommandLine OPTIONAL,
> +  IN CHAR16                     **Environment OPTIONAL,
> +  OUT EFI_STATUS                *StatusCode OPTIONAL
> +  );
> +
> +/**
> +  Find files that match a specified pattern.
> +
> +  This function searches for all files and directories that match the 
> specified
> +  FilePattern. The FilePattern can contain wild-card characters. The 
> resulting
> file
> +  information is placed in the file list FileList.
> +
> +  The files in the file list are not opened. The OpenMode field is set to 0 
> and
> the FileInfo
> +  field is set to NULL.
> +
> +  @param[in] FilePattern        Points to a NULL-terminated shell file path,
> including wildcards.
> +  @param[out] FileList          On return, points to the start of a file list
> containing the names
> +                                of all matching files or else points to NULL 
> if no matching
> files
> +                                were found.
> +
> +  @retval EFI_SUCCESS           Files found.
> +  @retval EFI_NOT_FOUND         No files found.
> +  @retval EFI_NO_MEDIA          The device has no media.
> +  @retval EFI_DEVICE_ERROR      The device reported an error.
> +  @retval EFI_VOLUME_CORRUPTED  The file system structures are
> corrupted.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_FIND_FILES)(
> +  IN CONST CHAR16               *FilePattern,
> +  OUT EFI_SHELL_FILE_INFO       **FileList
> +  );
> +
> +/**
> +  Find all files in a specified directory.
> +
> +  @param[in] FileDirHandle      Handle of the directory to search.
> +  @param[out] FileList          On return, points to the list of files in the
> directory
> +                                or NULL if there are no files in the 
> directory.
> +
> +  @retval EFI_SUCCESS           File information was returned successfully.
> +  @retval EFI_VOLUME_CORRUPTED  The file system structures have been
> corrupted.
> +  @retval EFI_DEVICE_ERROR      The device reported an error.
> +  @retval EFI_NO_MEDIA          The device media is not present.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_FIND_FILES_IN_DIR)(
> +IN SHELL_FILE_HANDLE            FileDirHandle,
> +OUT EFI_SHELL_FILE_INFO         **FileList
> +);
> +
> +/**
> +  Flushes data back to a device.
> +
> +  This function flushes all modified data associated with a file to a device.
> +
> +  @param[in] FileHandle         The handle of the file to flush.
> +
> +  @retval EFI_SUCCESS           The data was flushed.
> +  @retval EFI_NO_MEDIA          The device has no medium.
> +  @retval EFI_DEVICE_ERROR      The device reported an error.
> +  @retval EFI_VOLUME_CORRUPTED  The file system structures are
> corrupted.
> +  @retval EFI_WRITE_PROTECTED   The file or medium is write-protected.
> +  @retval EFI_ACCESS_DENIED     The file was opened read-only.
> +  @retval EFI_VOLUME_FULL       The volume is full.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_FLUSH_FILE)(
> +  IN SHELL_FILE_HANDLE FileHandle
> +  );
> +
> +/**
> +  Frees the file list.
> +
> +  This function cleans up the file list and any related data structures. It 
> has no
> +  impact on the files themselves.
> +
> +  @param[in] FileList           The file list to free. Type 
> EFI_SHELL_FILE_INFO is
> +                                defined in OpenFileList().
> +
> +  @retval EFI_SUCCESS           Free the file list successfully.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_FREE_FILE_LIST) (
> +  IN EFI_SHELL_FILE_INFO **FileList
> +  );
> +
> +/**
> +  Returns the current directory on the specified device.
> +
> +  If FileSystemMapping is NULL, it returns the current working directory. If
> the
> +  FileSystemMapping is not NULL, it returns the current directory associated
> with the
> +  FileSystemMapping. In both cases, the returned name includes the file
> system
> +  mapping (i.e. fs0:\current-dir).
> +
> +  Note that the current directory string should exclude the tailing backslash
> character.
> +
> +  @param[in] FileSystemMapping  A pointer to the file system mapping. If
> NULL,
> +                                then the current working directory is 
> returned.
> +
> +  @retval !=NULL                The current directory.
> +  @retval NULL                  Current directory does not exist.
> +**/
> +typedef
> +CONST CHAR16 *
> +(EFIAPI *EFI_SHELL_GET_CUR_DIR) (
> +  IN CONST CHAR16 *FileSystemMapping OPTIONAL
> +  );
> +
> +typedef UINT32 EFI_SHELL_DEVICE_NAME_FLAGS;
> +#define EFI_DEVICE_NAME_USE_COMPONENT_NAME  0x00000001
> +#define EFI_DEVICE_NAME_USE_DEVICE_PATH     0x00000002
> +
> +/**
> +  Gets the name of the device specified by the device handle.
> +
> +  This function gets the user-readable name of the device specified by the
> device
> +  handle. If no user-readable name could be generated, then
> *BestDeviceName will be
> +  NULL and EFI_NOT_FOUND will be returned.
> +
> +  If EFI_DEVICE_NAME_USE_COMPONENT_NAME is set, then the function
> will return the
> +  device's name using the EFI_COMPONENT_NAME2_PROTOCOL, if present
> on
> +  DeviceHandle.
> +
> +  If EFI_DEVICE_NAME_USE_DEVICE_PATH is set, then the function will
> return the
> +  device's name using the EFI_DEVICE_PATH_PROTOCOL, if present on
> DeviceHandle.
> +  If both EFI_DEVICE_NAME_USE_COMPONENT_NAME and
> +  EFI_DEVICE_NAME_USE_DEVICE_PATH are set, then
> +  EFI_DEVICE_NAME_USE_COMPONENT_NAME will have higher priority.
> +
> +  @param[in] DeviceHandle       The handle of the device.
> +  @param[in] Flags              Determines the possible sources of component
> names.
> +  @param[in] Language           A pointer to the language specified for the
> device
> +                                name, in the same format as described in the 
> UEFI
> +                                specification, Appendix M.
> +  @param[out] BestDeviceName    On return, points to the callee-allocated
> NULL-
> +                                terminated name of the device. If no device 
> name
> +                                could be found, points to NULL. The name 
> must be
> +                                freed by the caller...
> +
> +  @retval EFI_SUCCESS           Get the name successfully.
> +  @retval EFI_NOT_FOUND         Fail to get the device name.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_GET_DEVICE_NAME) (
> +  IN EFI_HANDLE                   DeviceHandle,
> +  IN EFI_SHELL_DEVICE_NAME_FLAGS  Flags,
> +  IN CHAR8                        *Language,
> +  OUT CHAR16                      **BestDeviceName
> +  );
> +
> +/**
> +  Gets the device path from the mapping.
> +
> +  This function gets the device path associated with a mapping.
> +
> +  @param[in] Mapping                A pointer to the mapping
> +
> +  @retval !=NULL                Pointer to the device path that corresponds 
> to the
> +                                device mapping. The returned pointer does 
> not need
> +                                to be freed.
> +  @retval NULL                  There is no device path associated with the
> +                                specified mapping.
> +**/
> +typedef
> +CONST EFI_DEVICE_PATH_PROTOCOL *
> +(EFIAPI *EFI_SHELL_GET_DEVICE_PATH_FROM_MAP) (
> +  IN CONST CHAR16 *Mapping
> +  );
> +
> +/**
> +  Converts a file system style name to a device path.
> +
> +  This function converts a file system style name to a device path, by
> replacing any
> +  mapping references to the associated device path.
> +
> +  @param[in] Path               The pointer to the path.
> +
> +  @return                       The pointer of the file path. The file path 
> is callee
> +                                allocated and should be freed by the caller.
> +**/
> +typedef
> +EFI_DEVICE_PATH_PROTOCOL *
> +(EFIAPI *EFI_SHELL_GET_DEVICE_PATH_FROM_FILE_PATH) (
> +  IN CONST CHAR16 *Path
> +  );
> +
> +/**
> +  Gets either a single or list of environment variables.
> +
> +  If name is not NULL then this function returns the current value of the
> specified
> +  environment variable.
> +
> +  If Name is NULL than a list of all environment variable names is returned.
> Each a
> +  NULL terminated string with a double NULL terminating the list.
> +
> +  @param[in] Name               A pointer to the environment variable name.  
> If
> +                                Name is NULL, then the function will return 
> all
> +                                of the defined shell environment variables.  
> In
> +                                the case where multiple environment 
> variables are
> +                                being returned, each variable will be 
> terminated by
> +                                a NULL, and the list will be terminated by a 
> double
> +                                NULL.
> +
> +  @return                       A pointer to the returned string.
> +                                The returned pointer does not need to be 
> freed by the
> caller.
> +
> +  @retval NULL                  The environment variable doesn't exist or 
> there are
> +                                no environment variables.
> +**/
> +typedef
> +CONST CHAR16 *
> +(EFIAPI *EFI_SHELL_GET_ENV) (
> +  IN CONST CHAR16 *Name OPTIONAL
> +  );
> +
> +/**
> +  Gets the environment variable and Attributes, or list of environment
> variables.  Can be
> +  used instead of GetEnv().
> +
> +  This function returns the current value of the specified environment
> variable and
> +  the Attributes. If no variable name was specified, then all of the known
> +  variables will be returned.
> +
> +  @param[in] Name               A pointer to the environment variable name. 
> If
> Name is NULL,
> +                                then the function will return all of the 
> defined shell
> +                                environment variables. In the case where 
> multiple
> environment
> +                                variables are being returned, each variable 
> will be
> terminated
> +                                by a NULL, and the list will be terminated 
> by a double NULL.
> +  @param[out] Attributes        If not NULL, a pointer to the returned
> attributes bitmask for
> +                                the environment variable. In the case where 
> Name is NULL,
> and
> +                                multiple environment variables are being 
> returned,
> Attributes
> +                                is undefined.
> +
> +  @retval NULL                  The environment variable doesn't exist.
> +  @return                       The environment variable's value. The 
> returned
> pointer does not
> +                                need to be freed by the caller.
> +**/
> +typedef
> +CONST CHAR16 *
> +(EFIAPI *EFI_SHELL_GET_ENV_EX) (
> +  IN  CONST CHAR16 *Name,
> +  OUT       UINT32 *Attributes OPTIONAL
> +  );
> +
> +/**
> +  Gets the file information from an open file handle.
> +
> +  This function allocates a buffer to store the file's information. It's the
> caller's
> +  responsibility to free the buffer.
> +
> +  @param[in] FileHandle         A File Handle.
> +
> +  @retval NULL                  Cannot get the file info.
> +  @return                       A pointer to a buffer with file information.
> +**/
> +typedef
> +EFI_FILE_INFO *
> +(EFIAPI *EFI_SHELL_GET_FILE_INFO)(
> +  IN SHELL_FILE_HANDLE FileHandle
> +  );
> +
> +/**
> +  Converts a device path to a file system-style path.
> +
> +  This function converts a device path to a file system path by replacing 
> part,
> or all, of
> +  the device path with the file-system mapping. If there are more than one
> application
> +  file system mappings, the one that most closely matches Path will be used.
> +
> +  @param[in] Path               The pointer to the device path.
> +
> +  @return                       The pointer of the NULL-terminated file 
> path. The path
> +                                is callee-allocated and should be freed by 
> the caller.
> +**/
> +typedef
> +CHAR16 *
> +(EFIAPI *EFI_SHELL_GET_FILE_PATH_FROM_DEVICE_PATH) (
> +  IN CONST EFI_DEVICE_PATH_PROTOCOL *Path
> +  );
> +
> +/**
> +  Gets a file's current position.
> +
> +  This function returns the current file position for the file handle. For
> directories, the
> +  current file position has no meaning outside of the file system driver and
> as such, the
> +  operation is not supported.
> +
> +  @param[in] FileHandle         The file handle on which to get the current
> position.
> +  @param[out] Position          Byte position from the start of the file.
> +
> +  @retval EFI_SUCCESS           Data was accessed.
> +  @retval EFI_UNSUPPORTED       The request is not valid on open
> directories.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_GET_FILE_POSITION)(
> +  IN SHELL_FILE_HANDLE FileHandle,
> +  OUT UINT64 *Position
> +  );
> +
> +/**
> +  Gets the size of a file.
> +
> +  This function returns the size of the file specified by FileHandle.
> +
> +  @param[in] FileHandle         The handle of the file.
> +  @param[out] Size              The size of this file.
> +
> +  @retval EFI_SUCCESS           Get the file's size.
> +  @retval EFI_DEVICE_ERROR      Can't access the file.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_GET_FILE_SIZE)(
> +  IN SHELL_FILE_HANDLE FileHandle,
> +  OUT UINT64 *Size
> +  );
> +
> +/**
> +  Get the GUID value from a human readable name.
> +
> +  If GuidName is a known GUID name, then update Guid to have the correct
> value for
> +  that GUID.
> +
> +  This function is only available when the major and minor versions in the
> +  EfiShellProtocol are greater than or equal to 2 and 1, respectively.
> +
> +  @param[in]  GuidName   A pointer to the localized name for the GUID
> being queried.
> +  @param[out] Guid       A pointer to the GUID structure to be filled in.
> +
> +  @retval EFI_SUCCESS             The operation was successful.
> +  @retval EFI_INVALID_PARAMETER   Guid was NULL.
> +  @retval EFI_INVALID_PARAMETER   GuidName was NULL.
> +  @retval EFI_NOT_FOUND           GuidName is not a known GUID Name.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_GET_GUID_FROM_NAME)(
> +  IN  CONST CHAR16   *GuidName,
> +  OUT       EFI_GUID *Guid
> +  );
> +
> +/**
> +  Get the human readable name for a GUID from the value.
> +
> +  If Guid is assigned a name, then update *GuidName to point to the name.
> The callee
> +  should not modify the value.
> +
> +  This function is only available when the major and minor versions in the
> +  EfiShellProtocol are greater than or equal to 2 and 1, respectively.
> +
> +  @param[in]  Guid       A pointer to the GUID being queried.
> +  @param[out] GuidName   A pointer to a pointer the localized to name for
> the GUID being requested
> +
> +  @retval EFI_SUCCESS             The operation was successful.
> +  @retval EFI_INVALID_PARAMETER   Guid was NULL.
> +  @retval EFI_INVALID_PARAMETER   GuidName was NULL.
> +  @retval EFI_NOT_FOUND           Guid is not assigned a name.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_GET_GUID_NAME)(
> +  IN  CONST EFI_GUID *Guid,
> +  OUT CONST CHAR16   **GuidName
> +  );
> +
> +/**
> +  Return help information about a specific command.
> +
> +  This function returns the help information for the specified command. The
> help text
> +  can be internal to the shell or can be from a UEFI Shell manual page.
> +
> +  If Sections is specified, then each section name listed will be compared 
> in a
> casesensitive
> +  manner, to the section names described in Appendix B. If the section
> exists,
> +  it will be appended to the returned help text. If the section does not 
> exist,
> no
> +  information will be returned. If Sections is NULL, then all help text
> information
> +  available will be returned.
> +
> +  @param[in] Command            Points to the NULL-terminated UEFI Shell
> command name.
> +  @param[in] Sections           Points to the NULL-terminated comma-
> delimited
> +                                section names to return. If NULL, then all
> +                                sections will be returned.
> +  @param[out] HelpText          On return, points to a callee-allocated 
> buffer
> +                                containing all specified help text.
> +
> +  @retval EFI_SUCCESS           The help text was returned.
> +  @retval EFI_OUT_OF_RESOURCES  The necessary buffer could not be
> allocated to hold the
> +                                returned help text.
> +  @retval EFI_INVALID_PARAMETER HelpText is NULL.
> +  @retval EFI_NOT_FOUND         There is no help text available for
> Command.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_GET_HELP_TEXT) (
> +  IN CONST CHAR16 *Command,
> +  IN CONST CHAR16 *Sections OPTIONAL,
> +  OUT CHAR16 **HelpText
> +  );
> +
> +/**
> +  Gets the mapping(s) that most closely matches the device path.
> +
> +  This function gets the mapping which corresponds to the device path
> *DevicePath. If
> +  there is no exact match, then the mapping which most closely matches
> *DevicePath
> +  is returned, and *DevicePath is updated to point to the remaining portion
> of the
> +  device path. If there is an exact match, the mapping is returned and
> *DevicePath
> +  points to the end-of-device-path node.
> +
> +  If there are multiple map names they will be semi-colon seperated in the
> +  NULL-terminated string.
> +
> +  @param[in, out] DevicePath     On entry, points to a device path pointer.
> On
> +                                 exit, updates the pointer to point to the
> +                                 portion of the device path after the 
> mapping.
> +
> +  @retval NULL                  No mapping was found.
> +  @retval !=NULL                Pointer to NULL-terminated mapping. The 
> buffer
> +                                is callee allocated and should be freed by 
> the caller.
> +**/
> +typedef
> +CONST CHAR16 *
> +(EFIAPI *EFI_SHELL_GET_MAP_FROM_DEVICE_PATH) (
> +  IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath
> +  );
> +
> +/**
> +  Gets the enable status of the page break output mode.
> +
> +  User can use this function to determine current page break mode.
> +
> +  @retval TRUE                  The page break output mode is enabled.
> +  @retval FALSE                 The page break output mode is disabled.
> +**/
> +typedef
> +BOOLEAN
> +(EFIAPI *EFI_SHELL_GET_PAGE_BREAK) (
> +  VOID
> +  );
> +
> +/**
> +  Judges whether the active shell is the root shell.
> +
> +  This function makes the user to know that whether the active Shell is the
> root shell.
> +
> +  @retval TRUE                  The active Shell is the root Shell.
> +  @retval FALSE                 The active Shell is NOT the root Shell.
> +**/
> +typedef
> +BOOLEAN
> +(EFIAPI *EFI_SHELL_IS_ROOT_SHELL) (
> +VOID
> +);
> +
> +/**
> +  Opens a file or a directory by file name.
> +
> +  This function opens the specified file in the specified OpenMode and
> returns a file
> +  handle.
> +  If the file name begins with '>v', then the file handle which is returned
> refers to the
> +  shell environment variable with the specified name. If the shell
> environment variable
> +  exists, is non-volatile and the OpenMode indicates
> EFI_FILE_MODE_WRITE, then
> +  EFI_INVALID_PARAMETER is returned.
> +
> +  If the file name is '>i', then the file handle which is returned refers to 
> the
> standard
> +  input. If the OpenMode indicates EFI_FILE_MODE_WRITE, then
> EFI_INVALID_PARAMETER
> +  is returned.
> +
> +  If the file name is '>o', then the file handle which is returned refers to 
> the
> standard
> +  output. If the OpenMode indicates EFI_FILE_MODE_READ, then
> EFI_INVALID_PARAMETER
> +  is returned.
> +
> +  If the file name is '>e', then the file handle which is returned refers to 
> the
> standard
> +  error. If the OpenMode indicates EFI_FILE_MODE_READ, then
> EFI_INVALID_PARAMETER
> +  is returned.
> +
> +  If the file name is 'NUL', then the file handle that is returned refers to 
> the
> standard NUL
> +  file. If the OpenMode indicates EFI_FILE_MODE_READ, then
> EFI_INVALID_PARAMETER is
> +  returned.
> +
> +  If return EFI_SUCCESS, the FileHandle is the opened file's handle, else, 
> the
> +  FileHandle is NULL.
> +
> +  @param[in] FileName           Points to the NULL-terminated UCS-2 encoded
> file name.
> +  @param[out] FileHandle        On return, points to the file handle.
> +  @param[in] OpenMode           File open mode. Either
> EFI_FILE_MODE_READ or
> +                                EFI_FILE_MODE_WRITE from section 12.4 of the 
> UEFI
> +                                Specification.
> +  @retval EFI_SUCCESS           The file was opened. FileHandle has the
> opened file's handle.
> +  @retval EFI_INVALID_PARAMETER One of the parameters has an invalid
> value. FileHandle is NULL.
> +  @retval EFI_UNSUPPORTED       Could not open the file path. FileHandle is
> NULL.
> +  @retval EFI_NOT_FOUND         The specified file could not be found on the
> device or the file
> +                                system could not be found on the device. 
> FileHandle is
> NULL.
> +  @retval EFI_NO_MEDIA          The device has no medium. FileHandle is
> NULL.
> +  @retval EFI_MEDIA_CHANGED     The device has a different medium in it
> or the medium is no
> +                                longer supported. FileHandle is NULL.
> +  @retval EFI_DEVICE_ERROR      The device reported an error or can't get
> the file path according
> +                                the FileName. FileHandle is NULL.
> +  @retval EFI_VOLUME_CORRUPTED  The file system structures are
> corrupted. FileHandle is NULL.
> +  @retval EFI_WRITE_PROTECTED   An attempt was made to create a file, or
> open a file for write
> +                                when the media is write-protected. 
> FileHandle is NULL.
> +  @retval EFI_ACCESS_DENIED     The service denied access to the file.
> FileHandle is NULL.
> +  @retval EFI_OUT_OF_RESOURCES  Not enough resources were available
> to open the file. FileHandle
> +                                is NULL.
> +  @retval EFI_VOLUME_FULL       The volume is full. FileHandle is NULL.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_OPEN_FILE_BY_NAME) (
> +  IN CONST CHAR16 *FileName,
> +  OUT SHELL_FILE_HANDLE *FileHandle,
> +  IN UINT64 OpenMode
> +  );
> +
> +/**
> +  Opens the files that match the path specified.
> +
> +  This function opens all of the files specified by Path. Wildcards are
> processed
> +  according to the rules specified in UEFI Shell 2.0 spec section 3.7.1. Each
> +  matching file has an EFI_SHELL_FILE_INFO structure created in a linked 
> list.
> +
> +  @param[in] Path                A pointer to the path string.
> +  @param[in] OpenMode            Specifies the mode used to open each file,
> EFI_FILE_MODE_READ or
> +                                 EFI_FILE_MODE_WRITE.
> +  @param[in, out] FileList       Points to the start of a list of files 
> opened.
> +
> +  @retval EFI_SUCCESS           Create the file list successfully.
> +  @return                       Can't create the file list.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_OPEN_FILE_LIST) (
> +  IN CHAR16 *Path,
> +  IN UINT64 OpenMode,
> +  IN OUT EFI_SHELL_FILE_INFO **FileList
> +  );
> +
> +/**
> +  Opens the root directory of a device.
> +
> +  This function opens the root directory of a device and returns a file 
> handle
> to it.
> +
> +  @param[in] DevicePath         Points to the device path corresponding to 
> the
> device where the
> +                                EFI_SIMPLE_FILE_SYSTEM_PROTOCOL is installed.
> +  @param[out] FileHandle        On exit, points to the file handle
> corresponding to the root directory on the
> +                                device.
> +
> +  @retval EFI_SUCCESS           Root opened successfully.
> +  @retval EFI_NOT_FOUND         EFI_SIMPLE_FILE_SYSTEM could not be
> found or the root directory
> +                                could not be opened.
> +  @retval EFI_VOLUME_CORRUPTED  The data structures in the volume
> were corrupted.
> +  @retval EFI_DEVICE_ERROR      The device had an error.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_OPEN_ROOT)(
> +  IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
> +  OUT SHELL_FILE_HANDLE *FileHandle
> +  );
> +
> +/**
> +  Opens the root directory of a device on a handle.
> +
> +  This function opens the root directory of a device and returns a file 
> handle
> to it.
> +
> +  @param[in] DeviceHandle       The handle of the device that contains the
> volume.
> +  @param[out] FileHandle        On exit, points to the file handle
> corresponding to the root directory on the
> +                                device.
> +
> +  @retval EFI_SUCCESS           Root opened successfully.
> +  @retval EFI_NOT_FOUND         EFI_SIMPLE_FILE_SYSTEM could not be
> found or the root directory
> +                                could not be opened.
> +  @retval EFI_VOLUME_CORRUPTED  The data structures in the volume
> were corrupted.
> +  @retval EFI_DEVICE_ERROR      The device had an error.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_OPEN_ROOT_BY_HANDLE)(
> +  IN EFI_HANDLE DeviceHandle,
> +  OUT SHELL_FILE_HANDLE *FileHandle
> +  );
> +
> +/**
> +  Reads data from the file.
> +
> +  If FileHandle is not a directory, the function reads the requested number
> of bytes
> +  from the file at the file's current position and returns them in Buffer. 
> If the
> read goes
> +  beyond the end of the file, the read length is truncated to the end of the
> file. The file's
> +  current position is increased by the number of bytes returned.
> +  If FileHandle is a directory, then an error is returned.
> +
> +  @param[in] FileHandle          The opened file handle for read.
> +  @param[in] ReadSize            On input, the size of Buffer, in bytes. On
> output, the amount of data read.
> +  @param[in, out] Buffer         The buffer in which data is read.
> +
> +  @retval EFI_SUCCESS           Data was read.
> +  @retval EFI_NO_MEDIA          The device has no media.
> +  @retval EFI_DEVICE_ERROR      The device reported an error.
> +  @retval EFI_VOLUME_CORRUPTED  The file system structures are
> corrupted.
> +  @retval EFI_BUFFER_TO_SMALL   Buffer is too small. ReadSize contains
> required size.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_READ_FILE) (
> +  IN SHELL_FILE_HANDLE FileHandle,
> +  IN OUT UINTN *ReadSize,
> +  IN OUT VOID *Buffer
> +  );
> +
> +/**
> +  Register a GUID and a localized human readable name for it.
> +
> +  If Guid is not assigned a name, then assign GuidName to Guid.  This list of
> GUID
> +  names must be used whenever a shell command outputs GUID
> information.
> +
> +  This function is only available when the major and minor versions in the
> +  EfiShellProtocol are greater than or equal to 2 and 1, respectively.
> +
> +  @param[in] Guid       A pointer to the GUID being registered.
> +  @param[in] GuidName   A pointer to the localized name for the GUID
> being registered.
> +
> +  @retval EFI_SUCCESS             The operation was successful.
> +  @retval EFI_INVALID_PARAMETER   Guid was NULL.
> +  @retval EFI_INVALID_PARAMETER   GuidName was NULL.
> +  @retval EFI_ACCESS_DENIED       Guid already is assigned a name.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_REGISTER_GUID_NAME)(
> +  IN CONST EFI_GUID *Guid,
> +  IN CONST CHAR16   *GuidName
> +  );
> +
> +/**
> +  Deletes the duplicate file names files in the given file list.
> +
> +  @param[in] FileList           A pointer to the first entry in the file 
> list.
> +
> +  @retval EFI_SUCCESS           Always success.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_REMOVE_DUP_IN_FILE_LIST) (
> +  IN EFI_SHELL_FILE_INFO **FileList
> +  );
> +
> +/**
> +  Changes a shell command alias.
> +
> +  This function creates an alias for a shell command.
> +
> +  @param[in] Command            Points to the NULL-terminated shell
> command or existing alias.
> +  @param[in] Alias              Points to the NULL-terminated alias for the 
> shell
> command. If this is NULL, and
> +                                Command refers to an alias, that alias will 
> be deleted.
> +  @param[in] Replace            If TRUE and the alias already exists, then 
> the
> existing alias will be replaced. If
> +                                FALSE and the alias already exists, then the 
> existing alias is
> unchanged and
> +                                EFI_ACCESS_DENIED is returned.
> +  @param[in] Volatile           if TRUE the Alias being set will be stored 
> in a
> volatile fashion.  if FALSE the
> +                                Alias being set will be stored in a 
> non-volatile fashion.
> +
> +  @retval EFI_SUCCESS           Alias created or deleted successfully.
> +  @retval EFI_ACCESS_DENIED     The alias is a built-in alias or already 
> existed
> and Replace was set to
> +                                FALSE.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_SET_ALIAS)(
> +  IN CONST CHAR16 *Command,
> +  IN CONST CHAR16 *Alias,
> +  IN BOOLEAN Replace,
> +  IN BOOLEAN Volatile
> +  );
> +
> +/**
> +  This function returns the command associated with a alias or a list of all
> +  alias'.
> +
> +  @param[in] Alias              Points to the NULL-terminated shell alias.
> +                                If this parameter is NULL, then all
> +                                aliases will be returned in ReturnedData.
> +  @param[out] Volatile          Upon return of a single command if TRUE
> indicates
> +                                this is stored in a volatile fashion.  FALSE 
> otherwise.
> +  @return                            If Alias is not NULL, it will return a 
> pointer to
> +                                the NULL-terminated command for that alias.
> +                                If Alias is NULL, ReturnedData points to a 
> ';'
> +                                delimited list of alias (e.g.
> +                                ReturnedData = "dir;del;copy;mfp") that is 
> NULL-
> terminated.
> +  @retval NULL                  An error ocurred.
> +  @retval NULL                  Alias was not a valid Alias.
> +**/
> +typedef
> +CONST CHAR16 *
> +(EFIAPI *EFI_SHELL_GET_ALIAS)(
> +  IN  CONST CHAR16 *Alias,
> +  OUT BOOLEAN      *Volatile OPTIONAL
> +  );
> +
> +/**
> +  Changes the current directory on the specified device.
> +
> +  If the FileSystem is NULL, and the directory Dir does not contain a file
> system's
> +  mapped name, this function changes the current working directory. If
> FileSystem is
> +  NULL and the directory Dir contains a mapped name, then the current file
> system and
> +  the current directory on that file system are changed.
> +
> +  If FileSystem is not NULL, and Dir is NULL, then this changes the current
> working file
> +  system.
> +
> +  If FileSystem is not NULL and Dir is not NULL, then this function changes
> the current
> +  directory on the specified file system.
> +
> +  If the current working directory or the current working file system is
> changed then the
> +  %cwd% environment variable will be updated.
> +
> +  @param[in] FileSystem         A pointer to the file system's mapped name. 
> If
> NULL, then the current working
> +                                directory is changed.
> +  @param[in] Dir                Points to the NULL-terminated directory on 
> the
> device specified by FileSystem.
> +
> +  @retval NULL                  Current directory does not exist.
> +  @return                       The current directory.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_SET_CUR_DIR) (
> +  IN CONST CHAR16 *FileSystem OPTIONAL,
> +  IN CONST CHAR16 *Dir
> +  );
> +
> +/**
> +  Sets the environment variable.
> +
> +  This function changes the current value of the specified environment
> variable. If the
> +  environment variable exists and the Value is an empty string, then the
> environment
> +  variable is deleted. If the environment variable exists and the Value is 
> not
> an empty
> +  string, then the value of the environment variable is changed. If the
> environment
> +  variable does not exist and the Value is an empty string, there is no 
> action.
> If the
> +  environment variable does not exist and the Value is a non-empty string,
> then the
> +  environment variable is created and assigned the specified value.
> +
> +  For a description of volatile and non-volatile environment variables, see
> UEFI Shell
> +  2.0 specification section 3.6.1.
> +
> +  @param[in] Name               Points to the NULL-terminated environment
> variable name.
> +  @param[in] Value              Points to the NULL-terminated environment
> variable value. If the value is an
> +                                empty string then the environment variable 
> is deleted.
> +  @param[in] Volatile           Indicates whether the variable is 
> non-volatile
> (FALSE) or volatile (TRUE).
> +
> +  @retval EFI_SUCCESS           The environment variable was successfully
> updated.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_SET_ENV) (
> +  IN CONST CHAR16 *Name,
> +  IN CONST CHAR16 *Value,
> +  IN BOOLEAN Volatile
> +  );
> +
> +/**
> +  Sets the file information to an opened file handle.
> +
> +  This function changes file information.  All file information in the
> EFI_FILE_INFO
> +  struct will be updated to the passed in data.
> +
> +  @param[in] FileHandle         A file handle.
> +  @param[in] FileInfo           Points to new file information.
> +
> +  @retval EFI_SUCCESS           The information was set.
> +  @retval EFI_NO_MEDIA          The device has no medium.
> +  @retval EFI_DEVICE_ERROR      The device reported an error.
> +  @retval EFI_VOLUME_CORRUPTED  The file system structures are
> corrupted.
> +  @retval EFI_WRITE_PROTECTED   The file or medium is write-protected.
> +  @retval EFI_ACCESS_DENIED     The file was opened read-only.
> +  @retval EFI_VOLUME_FULL       The volume is full.
> +  @retval EFI_BAD_BUFFER_SIZE   BufferSize is smaller than the size of
> EFI_FILE_INFO.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_SET_FILE_INFO)(
> +  IN SHELL_FILE_HANDLE FileHandle,
> +  IN CONST EFI_FILE_INFO *FileInfo
> +  );
> +
> +/**
> +  Sets a file's current position.
> +
> +  This function sets the current file position for the handle to the position
> supplied. With
> +  the exception of seeking to position 0xFFFFFFFFFFFFFFFF, only absolute
> positioning is
> +  supported, and seeking past the end of the file is allowed (a subsequent
> write would
> +  grow the file). Seeking to position 0xFFFFFFFFFFFFFFFF causes the current
> position
> +  to be set to the end of the file.
> +
> +  @param[in] FileHandle         The file handle on which requested position
> will be set.
> +  @param[in] Position           Byte position from the start of the file.
> +
> +  @retval EFI_SUCCESS           Data was written.
> +  @retval EFI_UNSUPPORTED       The seek request for nonzero is not valid
> on open directories.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_SET_FILE_POSITION)(
> +  IN SHELL_FILE_HANDLE FileHandle,
> +  IN UINT64 Position
> +  );
> +
> +/**
> +  This function creates a mapping for a device path.
> +
> +  @param[in] DevicePath         Points to the device path. If this is NULL 
> and
> Mapping points to a valid mapping,
> +                                then the mapping will be deleted.
> +  @param[in] Mapping            Points to the NULL-terminated mapping for the
> device path.
> +
> +  @retval EFI_SUCCESS           Mapping created or deleted successfully.
> +  @retval EFI_NO_MAPPING        There is no handle that corresponds exactly
> to DevicePath. See the
> +                                boot service function LocateDevicePath().
> +  @retval EFI_ACCESS_DENIED     The mapping is a built-in alias.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_SET_MAP)(
> +  IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
> +  IN CONST CHAR16 *Mapping
> +  );
> +
> +/**
> +  Writes data to the file.
> +
> +  This function writes the specified number of bytes to the file at the 
> current
> file position.
> +  The current file position is advanced the actual number of bytes written,
> which is
> +  returned in BufferSize. Partial writes only occur when there has been a
> data error
> +  during the write attempt (such as "volume space full"). The file
> automatically grows to
> +  hold the data, if required.
> +
> +  Direct writes to opened directories are not supported.
> +
> +  @param[in] FileHandle              The opened file handle for writing.
> +  @param[in, out] BufferSize         On input, size of Buffer.
> +  @param[in] Buffer                  The buffer in which data to write.
> +
> +  @retval EFI_SUCCESS               Data was written.
> +  @retval EFI_UNSUPPORTED           Writes to open directory are not
> supported.
> +  @retval EFI_NO_MEDIA              The device has no media.
> +  @retval EFI_DEVICE_ERROR          The device reported an error.
> +  @retval EFI_VOLUME_CORRUPTED      The file system structures are
> corrupted.
> +  @retval EFI_WRITE_PROTECTED       The device is write-protected.
> +  @retval EFI_ACCESS_DENIED         The file was open for read only.
> +  @retval EFI_VOLUME_FULL           The volume is full.
> +**/
> +typedef
> +EFI_STATUS
> +(EFIAPI *EFI_SHELL_WRITE_FILE)(
> +  IN SHELL_FILE_HANDLE          FileHandle,
> +  IN OUT UINTN                  *BufferSize,
> +  IN VOID                       *Buffer
> +  );
> +
> +//
> +// EFI_SHELL_PROTOCOL has been updated since UEFI Shell Spec 2.0
> +// Usage of this protocol will require version checking before attempting
> +// to use any new members.  There is no need to check the version for
> +// members that existed in UEFI Shell Spec 2.0.
> +//
> +// Update below for any future UEFI Shell spec changes to this protocol.
> +//
> +// Check EFI_SHELL_PROTOCOL MajorVersion and MinorVersion:
> +// if ((2 == gEfiShellProtocol->MajorVersion) &&
> +//     (0 == gEfiShellProtocol->MinorVersion)) {
> +//   //
> +//   // Cannot call:
> +//   // RegisterGuidName - UEFI Shell 2.1
> +//   // GetGuidName      - UEFI Shell 2.1
> +//   // GetGuidFromName  - UEFI Shell 2.1
> +//   // GetEnvEx         - UEFI Shell 2.1
> +//   //
> +// } else {
> +//   //
> +//   // Can use all members
> +//   //
> +// }
> +//
> +typedef struct _EFI_SHELL_PROTOCOL {
> +  EFI_SHELL_EXECUTE                         Execute;
> +  EFI_SHELL_GET_ENV                         GetEnv;
> +  EFI_SHELL_SET_ENV                         SetEnv;
> +  EFI_SHELL_GET_ALIAS                       GetAlias;
> +  EFI_SHELL_SET_ALIAS                       SetAlias;
> +  EFI_SHELL_GET_HELP_TEXT                   GetHelpText;
> +  EFI_SHELL_GET_DEVICE_PATH_FROM_MAP        GetDevicePathFromMap;
> +  EFI_SHELL_GET_MAP_FROM_DEVICE_PATH        GetMapFromDevicePath;
> +  EFI_SHELL_GET_DEVICE_PATH_FROM_FILE_PATH
> GetDevicePathFromFilePath;
> +  EFI_SHELL_GET_FILE_PATH_FROM_DEVICE_PATH
> GetFilePathFromDevicePath;
> +  EFI_SHELL_SET_MAP                         SetMap;
> +  EFI_SHELL_GET_CUR_DIR                     GetCurDir;
> +  EFI_SHELL_SET_CUR_DIR                     SetCurDir;
> +  EFI_SHELL_OPEN_FILE_LIST                  OpenFileList;
> +  EFI_SHELL_FREE_FILE_LIST                  FreeFileList;
> +  EFI_SHELL_REMOVE_DUP_IN_FILE_LIST         RemoveDupInFileList;
> +  EFI_SHELL_BATCH_IS_ACTIVE                 BatchIsActive;
> +  EFI_SHELL_IS_ROOT_SHELL                   IsRootShell;
> +  EFI_SHELL_ENABLE_PAGE_BREAK               EnablePageBreak;
> +  EFI_SHELL_DISABLE_PAGE_BREAK              DisablePageBreak;
> +  EFI_SHELL_GET_PAGE_BREAK                  GetPageBreak;
> +  EFI_SHELL_GET_DEVICE_NAME                 GetDeviceName;
> +  EFI_SHELL_GET_FILE_INFO                   GetFileInfo;
> +  EFI_SHELL_SET_FILE_INFO                   SetFileInfo;
> +  EFI_SHELL_OPEN_FILE_BY_NAME               OpenFileByName;
> +  EFI_SHELL_CLOSE_FILE                      CloseFile;
> +  EFI_SHELL_CREATE_FILE                     CreateFile;
> +  EFI_SHELL_READ_FILE                       ReadFile;
> +  EFI_SHELL_WRITE_FILE                      WriteFile;
> +  EFI_SHELL_DELETE_FILE                     DeleteFile;
> +  EFI_SHELL_DELETE_FILE_BY_NAME             DeleteFileByName;
> +  EFI_SHELL_GET_FILE_POSITION               GetFilePosition;
> +  EFI_SHELL_SET_FILE_POSITION               SetFilePosition;
> +  EFI_SHELL_FLUSH_FILE                      FlushFile;
> +  EFI_SHELL_FIND_FILES                      FindFiles;
> +  EFI_SHELL_FIND_FILES_IN_DIR               FindFilesInDir;
> +  EFI_SHELL_GET_FILE_SIZE                   GetFileSize;
> +  EFI_SHELL_OPEN_ROOT                       OpenRoot;
> +  EFI_SHELL_OPEN_ROOT_BY_HANDLE             OpenRootByHandle;
> +  EFI_EVENT                                 ExecutionBreak;
> +  UINT32                                    MajorVersion;
> +  UINT32                                    MinorVersion;
> +  // Added for Shell 2.1
> +  EFI_SHELL_REGISTER_GUID_NAME              RegisterGuidName;
> +  EFI_SHELL_GET_GUID_NAME                   GetGuidName;
> +  EFI_SHELL_GET_GUID_FROM_NAME              GetGuidFromName;
> +  EFI_SHELL_GET_ENV_EX                      GetEnvEx;
> +} EFI_SHELL_PROTOCOL;
> +
> +extern EFI_GUID gEfiShellProtocolGuid;
> +
> +enum ShellVersion {
> +  SHELL_MAJOR_VERSION = 2,
> +  SHELL_MINOR_VERSION = 1
> +};
> +
> +#endif
> diff --git a/MdePkg/Include/Protocol/ShellDynamicCommand.h
> b/MdePkg/Include/Protocol/ShellDynamicCommand.h
> new file mode 100644
> index 0000000..793b4fd
> --- /dev/null
> +++ b/MdePkg/Include/Protocol/ShellDynamicCommand.h
> @@ -0,0 +1,85 @@
> +/** @file
> +  EFI Shell Dynamic Command registration protocol
> +
> +  (C) Copyright 2012-2014 Hewlett-Packard Development Company,
> L.P.<BR>
> +  Copyright (c) 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
> +  which 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.
> +
> +**/
> +
> +#ifndef __EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL__
> +#define __EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL__
> +
> +#include <Protocol/Shell.h>
> +#include <Protocol/ShellParameters.h>
> +
> +// {3C7200E9-005F-4EA4-87DE-A3DFAC8A27C3}
> +#define EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL_GUID \
> +  { \
> +  0x3c7200e9, 0x005f, 0x4ea4, { 0x87, 0xde, 0xa3, 0xdf, 0xac, 0x8a, 0x27, 
> 0xc3
> } \
> +  }
> +
> +
> +//
> +// Define for forward reference.
> +//
> +typedef struct _EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL
> EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL;
> +
> +
> +/**
> +  This is the shell command handler function pointer callback type.  This
> +  function handles the command when it is invoked in the shell.
> +
> +  @param[in] This                   The instance of the
> EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL.
> +  @param[in] SystemTable            The pointer to the system table.
> +  @param[in] ShellParameters        The parameters associated with the
> command.
> +  @param[in] Shell                  The instance of the shell protocol used 
> in the
> context
> +                                    of processing this command.
> +
> +  @return EFI_SUCCESS               the operation was sucessful
> +  @return other                     the operation failed.
> +**/
> +typedef
> +SHELL_STATUS
> +(EFIAPI * SHELL_COMMAND_HANDLER)(
> +  IN EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL    *This,
> +  IN EFI_SYSTEM_TABLE                      *SystemTable,
> +  IN EFI_SHELL_PARAMETERS_PROTOCOL         *ShellParameters,
> +  IN EFI_SHELL_PROTOCOL                    *Shell
> +  );
> +
> +/**
> +  This is the command help handler function pointer callback type.  This
> +  function is responsible for displaying help information for the associated
> +  command.
> +
> +  @param[in] This                   The instance of the
> EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL.
> +  @param[in] Language               The pointer to the language string to 
> use.
> +
> +  @return string                    Pool allocated help string, must be 
> freed by caller
> +**/
> +typedef
> +CHAR16*
> +(EFIAPI * SHELL_COMMAND_GETHELP)(
> +  IN EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL    *This,
> +  IN CONST CHAR8                           *Language
> +  );
> +
> +/// EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL protocol structure.
> +struct _EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL {
> +
> +  CONST CHAR16           *CommandName;
> +  SHELL_COMMAND_HANDLER  Handler;
> +  SHELL_COMMAND_GETHELP  GetHelp;
> +
> +};
> +
> +extern EFI_GUID gEfiShellDynamicCommandProtocolGuid;
> +
> +#endif
> diff --git a/MdePkg/Include/Protocol/ShellParameters.h
> b/MdePkg/Include/Protocol/ShellParameters.h
> new file mode 100644
> index 0000000..68ca9ed
> --- /dev/null
> +++ b/MdePkg/Include/Protocol/ShellParameters.h
> @@ -0,0 +1,60 @@
> +/** @file
> +  EFI Shell protocol as defined in the UEFI Shell 2.0 specification.
> +
> +  Copyright (c) 2006 - 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
> +  which 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.
> +
> +**/
> +
> +#ifndef __EFI_SHELL_PARAMETERS_PROTOCOL__
> +#define __EFI_SHELL_PARAMETERS_PROTOCOL__
> +
> +#include <Protocol/Shell.h>
> +
> +#define EFI_SHELL_PARAMETERS_PROTOCOL_GUID \
> +  { \
> +  0x752f3136, 0x4e16, 0x4fdc, { 0xa2, 0x2a, 0xe5, 0xf4, 0x68, 0x12, 0xf4, 
> 0xca
> } \
> +  }
> +
> +typedef struct _EFI_SHELL_PARAMETERS_PROTOCOL {
> +  ///
> +  /// Points to an Argc-element array of points to NULL-terminated strings
> containing
> +  /// the command-line parameters. The first entry in the array is always the
> full file
> +  /// path of the executable. Any quotation marks that were used to
> preserve
> +  /// whitespace have been removed.
> +  ///
> +  CHAR16 **Argv;
> +
> +  ///
> +  /// The number of elements in the Argv array.
> +  ///
> +  UINTN Argc;
> +
> +  ///
> +  /// The file handle for the standard input for this executable. This may be
> different
> +  /// from the ConInHandle in EFI_SYSTEM_TABLE.
> +  ///
> +  SHELL_FILE_HANDLE StdIn;
> +
> +  ///
> +  /// The file handle for the standard output for this executable. This may 
> be
> different
> +  /// from the ConOutHandle in EFI_SYSTEM_TABLE.
> +  ///
> +  SHELL_FILE_HANDLE StdOut;
> +
> +  ///
> +  /// The file handle for the standard error output for this executable. This
> may be
> +  /// different from the StdErrHandle in EFI_SYSTEM_TABLE.
> +  ///
> +  SHELL_FILE_HANDLE StdErr;
> +} EFI_SHELL_PARAMETERS_PROTOCOL;
> +
> +extern EFI_GUID gEfiShellParametersProtocolGuid;
> +
> +#endif
> diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec
> index f1e5151..3e08bed 100644
> --- a/MdePkg/MdePkg.dec
> +++ b/MdePkg/MdePkg.dec
> @@ -1645,6 +1645,21 @@ [Protocols]
>    ## Include/Protocol/EraseBlock.h
>    gEfiEraseBlockProtocolGuid           = { 0x95a9a93e, 0xa86e, 0x4926, {0xaa,
> 0xef, 0x99, 0x18, 0xe7, 0x72, 0xd9, 0x87 }}
> 
> +  #
> +  # Protocols defined in Shell2.0
> +  #
> +  ## Include/Protocol/Shell.h
> +  gEfiShellProtocolGuid                = { 0x6302d008, 0x7f9b, 0x4f30, 
> {0x87, 0xac,
> 0x60, 0xc9, 0xfe, 0xf5, 0xda, 0x4e }}
> +
> +  ## Include/Protocol/ShellParameters.h
> +  gEfiShellParametersProtocolGuid      = { 0x752f3136, 0x4e16, 0x4fdc, {0xa2,
> 0x2a, 0xe5, 0xf4, 0x68, 0x12, 0xf4, 0xca }}
> +
> +  #
> +  # Protocols defined in Shell2.1
> +  #
> +  ## Include/Protocol/ShellDynamicCommand.h
> +  gEfiShellDynamicCommandProtocolGuid  = { 0x3c7200e9, 0x005f, 0x4ea4,
> {0x87, 0xde, 0xa3, 0xdf, 0xac, 0x8a, 0x27, 0xc3 }}
> +
>  #
>  # [Error.gEfiMdePkgTokenSpaceGuid]
>  #   0x80000001 | Invalid value provided.
> --
> 2.9.0.windows.1
> 
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