Exemplo n.º 1
0
Arquivo: Tftp.c Projeto: rsalveti/edk2
/**
  Function for 'tftp' command.

  @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  @param[in] SystemTable  Pointer to the System Table (NULL if Internal).

  @return  SHELL_SUCCESS            The 'tftp' command completed successfully.
  @return  SHELL_ABORTED            The Shell Library initialization failed.
  @return  SHELL_INVALID_PARAMETER  At least one of the command's arguments is
                                    not valid.
  @return  SHELL_OUT_OF_RESOURCES   A memory allocation failed.
  @return  SHELL_NOT_FOUND          Network Interface Card not found or server
                                    error or file error.

**/
SHELL_STATUS
EFIAPI
ShellCommandRunTftp (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  SHELL_STATUS            ShellStatus;
  EFI_STATUS              Status;
  LIST_ENTRY              *CheckPackage;
  CHAR16                  *ProblemParam;
  UINTN                   ParamCount;
  CONST CHAR16            *UserNicName;
  BOOLEAN                 NicFound;
  CONST CHAR16            *ValueStr;
  CONST CHAR16            *RemoteFilePath;
  CHAR8                   *AsciiRemoteFilePath;
  CONST CHAR16            *Walker;
  CONST CHAR16            *LocalFilePath;
  EFI_MTFTP4_CONFIG_DATA  Mtftp4ConfigData;
  EFI_HANDLE              *Handles;
  UINTN                   HandleCount;
  UINTN                   NicNumber;
  CHAR16                  NicName[IP4_CONFIG2_INTERFACE_INFO_NAME_LENGTH];
  EFI_HANDLE              ControllerHandle;
  EFI_HANDLE              Mtftp4ChildHandle;
  EFI_MTFTP4_PROTOCOL     *Mtftp4;
  UINTN                   FileSize;
  VOID                    *Data;
  SHELL_FILE_HANDLE       FileHandle;

  ShellStatus         = SHELL_INVALID_PARAMETER;
  ProblemParam        = NULL;
  NicFound            = FALSE;
  AsciiRemoteFilePath = NULL;
  Handles             = NULL;
  FileSize            = 0;

  //
  // Initialize the Shell library (we must be in non-auto-init...)
  //
  Status = ShellInitialize ();
  if (EFI_ERROR (Status)) {
    ASSERT_EFI_ERROR (Status);
    return SHELL_ABORTED;
  }

  //
  // Parse the command line.
  //
  Status = ShellCommandLineParse (ParamList, &CheckPackage, &ProblemParam, TRUE);
  if (EFI_ERROR (Status)) {
    if ((Status == EFI_VOLUME_CORRUPTED) &&
        (ProblemParam != NULL) ) {
      ShellPrintHiiEx (
        -1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellTftpHiiHandle,
        L"tftp", ProblemParam
        );
      FreePool (ProblemParam);
    } else {
      ASSERT (FALSE);
    }
    goto Error;
  }

  //
  // Check the number of parameters
  //
  ParamCount = ShellCommandLineGetCount (CheckPackage);
  if (ParamCount > 4) {
    ShellPrintHiiEx (
      -1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY),
      gShellTftpHiiHandle, L"tftp"
      );
    goto Error;
  }
  if (ParamCount < 3) {
    ShellPrintHiiEx (
      -1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW),
      gShellTftpHiiHandle, L"tftp"
      );
    goto Error;
  }

  Mtftp4ConfigData = DefaultMtftp4ConfigData;

  //
  // Check the host IPv4 address
  //
  ValueStr = ShellCommandLineGetRawValue (CheckPackage, 1);
  Status = NetLibStrToIp4 (ValueStr, &Mtftp4ConfigData.ServerIp);
  if (EFI_ERROR (Status)) {
    ShellPrintHiiEx (
      -1, -1, NULL, STRING_TOKEN (STR_GEN_PARAM_INV),
      gShellTftpHiiHandle, L"tftp", ValueStr
    );
    goto Error;
  }

  RemoteFilePath = ShellCommandLineGetRawValue (CheckPackage, 2);
  AsciiRemoteFilePath = AllocatePool (
                          (StrLen (RemoteFilePath) + 1) * sizeof (CHAR8)
                          );
  if (AsciiRemoteFilePath == NULL) {
    ShellStatus = SHELL_OUT_OF_RESOURCES;
    goto Error;
  }
  UnicodeStrToAsciiStr (RemoteFilePath, AsciiRemoteFilePath);

  if (ParamCount == 4) {
    LocalFilePath = ShellCommandLineGetRawValue (CheckPackage, 3);
  } else {
    Walker = RemoteFilePath + StrLen (RemoteFilePath);
    while ((--Walker) >= RemoteFilePath) {
      if ((*Walker == L'\\') ||
          (*Walker == L'/' )    ) {
        break;
      }
    }
    LocalFilePath = Walker + 1;
  }

  //
  // Get the name of the Network Interface Card to be used if any.
  //
  UserNicName = ShellCommandLineGetValue (CheckPackage, L"-i");

  ValueStr = ShellCommandLineGetValue (CheckPackage, L"-l");
  if (ValueStr != NULL) {
    if (!StringToUint16 (ValueStr, &Mtftp4ConfigData.LocalPort)) {
      goto Error;
    }
  }

  ValueStr = ShellCommandLineGetValue (CheckPackage, L"-r");
  if (ValueStr != NULL) {
    if (!StringToUint16 (ValueStr, &Mtftp4ConfigData.InitialServerPort)) {
      goto Error;
    }
  }

  ValueStr = ShellCommandLineGetValue (CheckPackage, L"-c");
  if (ValueStr != NULL) {
    if (!StringToUint16 (ValueStr, &Mtftp4ConfigData.TryCount)) {
      goto Error;
    }
  }

  ValueStr = ShellCommandLineGetValue (CheckPackage, L"-t");
  if (ValueStr != NULL) {
    if (!StringToUint16 (ValueStr, &Mtftp4ConfigData.TimeoutValue)) {
      goto Error;
    }
    if (Mtftp4ConfigData.TimeoutValue == 0) {
      ShellPrintHiiEx (
        -1, -1, NULL, STRING_TOKEN (STR_GEN_PARAM_INV),
        gShellTftpHiiHandle, L"tftp", ValueStr
      );
      goto Error;
    }
  }

  //
  // Locate all MTFTP4 Service Binding protocols
  //
  ShellStatus = SHELL_NOT_FOUND;
  Status = gBS->LocateHandleBuffer (
                 ByProtocol,
                 &gEfiManagedNetworkServiceBindingProtocolGuid,
                 NULL,
                 &HandleCount,
                 &Handles
                 );
  if (EFI_ERROR (Status) || (HandleCount == 0)) {
    ShellPrintHiiEx (
      -1, -1, NULL, STRING_TOKEN (STR_TFTP_ERR_NO_NIC),
      gShellTftpHiiHandle
    );
    goto Error;
  }

  for (NicNumber = 0;
       (NicNumber < HandleCount) && (ShellStatus != SHELL_SUCCESS);
       NicNumber++) {
    ControllerHandle = Handles[NicNumber];
    Data = NULL;

    Status = GetNicName (ControllerHandle, NicNumber, NicName);
    if (EFI_ERROR (Status)) {
      ShellPrintHiiEx (
        -1, -1, NULL, STRING_TOKEN (STR_TFTP_ERR_NIC_NAME),
        gShellTftpHiiHandle, NicNumber, Status
      );
      continue;
    }

    if (UserNicName != NULL) {
      if (StrCmp (NicName, UserNicName) != 0) {
        continue;
      }
      NicFound = TRUE;
    }

    Status = CreateServiceChildAndOpenProtocol (
               ControllerHandle,
               &gEfiMtftp4ServiceBindingProtocolGuid,
               &gEfiMtftp4ProtocolGuid,
               &Mtftp4ChildHandle,
               (VOID**)&Mtftp4
               );
    if (EFI_ERROR (Status)) {
      ShellPrintHiiEx (
        -1, -1, NULL, STRING_TOKEN (STR_TFTP_ERR_OPEN_PROTOCOL),
        gShellTftpHiiHandle, NicName, Status
      );
      continue;
    }

    Status = Mtftp4->Configure (Mtftp4, &Mtftp4ConfigData);
    if (EFI_ERROR (Status)) {
      ShellPrintHiiEx (
        -1, -1, NULL, STRING_TOKEN (STR_TFTP_ERR_CONFIGURE),
        gShellTftpHiiHandle, NicName, Status
      );
      goto NextHandle;
    }

    Status = GetFileSize (Mtftp4, AsciiRemoteFilePath, &FileSize);
    if (EFI_ERROR (Status)) {
      ShellPrintHiiEx (
        -1, -1, NULL, STRING_TOKEN (STR_TFTP_ERR_FILE_SIZE),
        gShellTftpHiiHandle, RemoteFilePath, NicName, Status
      );
      goto NextHandle;
    }

    Status = DownloadFile (Mtftp4, RemoteFilePath, AsciiRemoteFilePath, FileSize, &Data);
    if (EFI_ERROR (Status)) {
      ShellPrintHiiEx (
        -1, -1, NULL, STRING_TOKEN (STR_TFTP_ERR_DOWNLOAD),
        gShellTftpHiiHandle, RemoteFilePath, NicName, Status
      );
      goto NextHandle;
    }

    if (!EFI_ERROR (ShellFileExists (LocalFilePath))) {
      ShellDeleteFileByName (LocalFilePath);
    }

    Status = ShellOpenFileByName (
               LocalFilePath,
               &FileHandle,
               EFI_FILE_MODE_CREATE |
               EFI_FILE_MODE_WRITE  |
               EFI_FILE_MODE_READ,
               0
               );
    if (EFI_ERROR (Status)) {
      ShellPrintHiiEx (
        -1, -1, NULL, STRING_TOKEN (STR_GEN_FILE_OPEN_FAIL),
        gShellTftpHiiHandle, L"tftp", LocalFilePath
      );
      goto NextHandle;
    }

    Status = ShellWriteFile (FileHandle, &FileSize, Data);
    if (!EFI_ERROR (Status)) {
      ShellStatus = SHELL_SUCCESS;
    } else {
      ShellPrintHiiEx (
        -1, -1, NULL, STRING_TOKEN (STR_TFTP_ERR_WRITE),
        gShellTftpHiiHandle, LocalFilePath, Status
      );
    }
    ShellCloseFile (&FileHandle);

    NextHandle:

    if (Data != NULL) {
      gBS->FreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)Data, EFI_SIZE_TO_PAGES (FileSize));
    }

    CloseProtocolAndDestroyServiceChild (
      ControllerHandle,
      &gEfiMtftp4ServiceBindingProtocolGuid,
      &gEfiMtftp4ProtocolGuid,
      Mtftp4ChildHandle
      );
  }

  if ((UserNicName != NULL) && (!NicFound)) {
    ShellPrintHiiEx (
      -1, -1, NULL, STRING_TOKEN (STR_TFTP_ERR_NIC_NOT_FOUND),
      gShellTftpHiiHandle, UserNicName
    );
  }

  Error:

  ShellCommandLineFreeVarList (CheckPackage);
  if (AsciiRemoteFilePath != NULL) {
    FreePool (AsciiRemoteFilePath);
  }
  if (Handles != NULL) {
    FreePool (Handles);
  }

  return ShellStatus;
}
Exemplo n.º 2
0
Arquivo: Mv.c Projeto: alt0174/edk2
/**
  function to take a list of files to move and a destination location and do
  the verification and moving of those files to that location.  This function
  will report any errors to the user and continue to move the rest of the files.

  @param[in] FileList           A LIST_ENTRY* based list of files to move
  @param[out] Resp              pointer to response from question.  Pass back on looped calling
  @param[in] DestParameter      the originally specified destination location

  @retval SHELL_SUCCESS             the files were all moved.
  @retval SHELL_INVALID_PARAMETER   a parameter was invalid
  @retval SHELL_SECURITY_VIOLATION  a security violation ocurred
  @retval SHELL_WRITE_PROTECTED     the destination was write protected
  @retval SHELL_OUT_OF_RESOURCES    a memory allocation failed
**/
SHELL_STATUS
EFIAPI
ValidateAndMoveFiles(
  IN EFI_SHELL_FILE_INFO        *FileList,
  OUT VOID                      **Resp,
  IN CONST CHAR16               *DestParameter
  )
{
  EFI_STATUS                Status;
  CHAR16                    *HiiOutput;
  CHAR16                    *HiiResultOk;
  CHAR16                    *DestPath;
  CHAR16                    *FullDestPath;
  CONST CHAR16              *Cwd;
  CHAR16                    *FullCwd;
  SHELL_STATUS              ShellStatus;
  EFI_SHELL_FILE_INFO       *Node;
  VOID                      *Response;
  UINT64                    Attr;
  CHAR16                    *CleanFilePathStr;

  ASSERT(FileList != NULL);
  ASSERT(DestParameter  != NULL);

  DestPath          = NULL;
  FullDestPath      = NULL;
  Cwd               = ShellGetCurrentDir(NULL);
  Response          = *Resp;
  Attr              = 0;
  CleanFilePathStr  = NULL;
  FullCwd           = NULL;

  if (Cwd != NULL) {
    FullCwd = AllocateZeroPool(StrSize(Cwd) + sizeof(CHAR16));
    if (FullCwd == NULL) {
      return SHELL_OUT_OF_RESOURCES;
    } else {
      StrCpyS(FullCwd, StrSize(Cwd)/sizeof(CHAR16)+1, Cwd);
      StrCatS(FullCwd, StrSize(Cwd)/sizeof(CHAR16)+1, L"\\");
    }
  } 

  Status = ShellLevel2StripQuotes (DestParameter, &CleanFilePathStr);
  if (EFI_ERROR (Status)) {
    SHELL_FREE_NON_NULL(FullCwd);
    if (Status == EFI_OUT_OF_RESOURCES) {
      return SHELL_OUT_OF_RESOURCES;
    } else {
      return SHELL_INVALID_PARAMETER;
    }
  }

  ASSERT (CleanFilePathStr != NULL);

  //
  // Get and validate the destination location
  //
  ShellStatus = GetDestinationLocation(CleanFilePathStr, &DestPath, FullCwd, (BOOLEAN)(FileList->Link.ForwardLink == FileList->Link.BackLink), &Attr);
  FreePool (CleanFilePathStr);

  if (ShellStatus != SHELL_SUCCESS) {
    SHELL_FREE_NON_NULL (FullCwd);
    return (ShellStatus);
  }
  DestPath = PathCleanUpDirectories(DestPath);
  if (DestPath == NULL) {
    FreePool (FullCwd);
    return (SHELL_OUT_OF_RESOURCES);
  }

  HiiOutput   = HiiGetString (gShellLevel2HiiHandle, STRING_TOKEN (STR_MV_OUTPUT), NULL);
  HiiResultOk = HiiGetString (gShellLevel2HiiHandle, STRING_TOKEN (STR_GEN_RES_OK), NULL);
  if (HiiOutput == NULL || HiiResultOk == NULL) {
    SHELL_FREE_NON_NULL(DestPath);
    SHELL_FREE_NON_NULL(HiiOutput);
    SHELL_FREE_NON_NULL(HiiResultOk);
    SHELL_FREE_NON_NULL(FullCwd);
    return (SHELL_OUT_OF_RESOURCES);
  }

  //
  // Go through the list of files and directories to move...
  //
  for (Node = (EFI_SHELL_FILE_INFO *)GetFirstNode(&FileList->Link)
    ;  !IsNull(&FileList->Link, &Node->Link)
    ;  Node = (EFI_SHELL_FILE_INFO *)GetNextNode(&FileList->Link, &Node->Link)
   ){
    if (ShellGetExecutionBreakFlag()) {
      break;
    }

    //
    // These should never be NULL
    //
    ASSERT(Node->FileName != NULL);
    ASSERT(Node->FullName != NULL);
    ASSERT(Node->Info     != NULL);

    //
    // skip the directory traversing stuff...
    //
    if (StrCmp(Node->FileName, L".") == 0 || StrCmp(Node->FileName, L"..") == 0) {
      continue;
    }

    SHELL_FREE_NON_NULL(FullDestPath);
    FullDestPath = NULL;
    if (ShellIsDirectory(DestPath)==EFI_SUCCESS) {
      CreateFullDestPath((CONST CHAR16 **)&DestPath, &FullDestPath, Node->FileName);
    }

    //
    // Validate that the move is valid
    //
    if (!IsValidMove(Node->FullName, FullCwd, FullDestPath!=NULL? FullDestPath:DestPath, Node->Info->Attribute, Attr, Node->Status)) {
      ShellStatus = SHELL_INVALID_PARAMETER;
      continue;
    }

    ShellPrintEx(-1, -1, HiiOutput, Node->FullName, FullDestPath!=NULL? FullDestPath:DestPath);

    //
    // See if destination exists
    //
    if (!EFI_ERROR(ShellFileExists(FullDestPath!=NULL? FullDestPath:DestPath))) {
      if (Response == NULL) {
        ShellPromptForResponseHii(ShellPromptResponseTypeYesNoAllCancel, STRING_TOKEN (STR_GEN_DEST_EXIST_OVR), gShellLevel2HiiHandle, &Response);
      }
      switch (*(SHELL_PROMPT_RESPONSE*)Response) {
        case ShellPromptResponseNo:
          FreePool(Response);
          Response = NULL;
          continue;
        case ShellPromptResponseCancel:
          *Resp = Response;
          //
          // indicate to stop everything
          //
          SHELL_FREE_NON_NULL(FullCwd);
          return (SHELL_ABORTED);
        case ShellPromptResponseAll:
          *Resp = Response;
          break;
        case ShellPromptResponseYes:
          FreePool(Response);
          Response = NULL;
          break;
        default:
          FreePool(Response);
          SHELL_FREE_NON_NULL(FullCwd);
          return SHELL_ABORTED;
      }
      Status = ShellDeleteFileByName(FullDestPath!=NULL? FullDestPath:DestPath);
    }

    if (IsBetweenFileSystem(Node->FullName, FullCwd, DestPath)) {
      while (FullDestPath == NULL && DestPath != NULL && DestPath[0] != CHAR_NULL && DestPath[StrLen(DestPath) - 1] == L'\\') {
        DestPath[StrLen(DestPath) - 1] = CHAR_NULL;
      }
      Status = MoveBetweenFileSystems(Node, FullDestPath!=NULL? FullDestPath:DestPath, &Response);
    } else {
      Status = MoveWithinFileSystems(Node, DestPath, &Response);
      //
      // Display error status
      //
      if (EFI_ERROR(Status)) {
        ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_ERR_UK), gShellLevel2HiiHandle, L"mv", Status);
      }
    }

    //
    // Check our result
    //
    if (EFI_ERROR(Status)) {
      ShellStatus = SHELL_INVALID_PARAMETER;
      if (Status == EFI_SECURITY_VIOLATION) {
        ShellStatus = SHELL_SECURITY_VIOLATION;
      } else if (Status == EFI_WRITE_PROTECTED) {
        ShellStatus = SHELL_WRITE_PROTECTED;
      } else if (Status == EFI_OUT_OF_RESOURCES) {
        ShellStatus = SHELL_OUT_OF_RESOURCES;
      } else if (Status == EFI_DEVICE_ERROR) {
        ShellStatus = SHELL_DEVICE_ERROR;
      } else if (Status == EFI_ACCESS_DENIED) {
        ShellStatus = SHELL_ACCESS_DENIED;
      }
    } else {
      ShellPrintEx(-1, -1, L"%s", HiiResultOk);
    }

  } // main for loop

  SHELL_FREE_NON_NULL(FullDestPath);
  SHELL_FREE_NON_NULL(DestPath);
  SHELL_FREE_NON_NULL(HiiOutput);
  SHELL_FREE_NON_NULL(HiiResultOk);
  SHELL_FREE_NON_NULL(FullCwd);
  return (ShellStatus);
}
Exemplo n.º 3
0
/**
  Function to Copy one file to another location

  If the destination exists the user will be prompted and the result put into *resp

  @param[in] Source     pointer to source file name
  @param[in] Dest       pointer to destination file name
  @param[out] Resp      pointer to response from question.  Pass back on looped calling
  @param[in] SilentMode whether to run in quiet mode or not
  @param[in] CmdName    Source command name requesting single file copy

  @retval SHELL_SUCCESS   The source file was copied to the destination
**/
SHELL_STATUS
CopySingleFile(
  IN CONST CHAR16 *Source,
  IN CONST CHAR16 *Dest,
  OUT VOID        **Resp,
  IN BOOLEAN      SilentMode,
  IN CONST CHAR16 *CmdName
  )
{
  VOID                  *Response;
  UINTN                 ReadSize;
  SHELL_FILE_HANDLE     SourceHandle;
  SHELL_FILE_HANDLE     DestHandle;
  EFI_STATUS            Status;
  VOID                  *Buffer;
  CHAR16                *TempName;
  UINTN                 Size;
  EFI_SHELL_FILE_INFO   *List;
  SHELL_STATUS          ShellStatus;
  UINT64                SourceFileSize;
  UINT64                DestFileSize;
  EFI_FILE_PROTOCOL     *DestVolumeFP;
  EFI_FILE_SYSTEM_INFO  *DestVolumeInfo;
  UINTN                 DestVolumeInfoSize;

  ASSERT(Resp != NULL);

  SourceHandle    = NULL;
  DestHandle      = NULL;
  Response        = *Resp;
  List            = NULL;
  DestVolumeInfo  = NULL;
  ShellStatus     = SHELL_SUCCESS;

  ReadSize = PcdGet32(PcdShellFileOperationSize);
  // Why bother copying a file to itself
  if (StrCmp(Source, Dest) == 0) {
    return (SHELL_SUCCESS);
  }

  //
  // if the destination file existed check response and possibly prompt user
  //
  if (ShellFileExists(Dest) == EFI_SUCCESS) {
    if (Response == NULL && !SilentMode) {
      Status = ShellPromptForResponseHii(ShellPromptResponseTypeYesNoAllCancel, STRING_TOKEN (STR_GEN_DEST_EXIST_OVR), gShellLevel2HiiHandle, &Response);
    }
    //
    // possibly return based on response
    //
    if (!SilentMode) {
      switch (*(SHELL_PROMPT_RESPONSE*)Response) {
        case ShellPromptResponseNo:
          //
          // return success here so we dont stop the process
          //
          return (SHELL_SUCCESS);
        case ShellPromptResponseCancel:
          *Resp = Response;
          //
          // indicate to stop everything
          //
          return (SHELL_ABORTED);
        case ShellPromptResponseAll:
          *Resp = Response;
        case ShellPromptResponseYes:
          break;
        default:
          return SHELL_ABORTED;
      }
    }
  }

  if (ShellIsDirectory(Source) == EFI_SUCCESS) {
    Status = ShellCreateDirectory(Dest, &DestHandle);
    if (EFI_ERROR(Status)) {
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CP_DEST_DIR_FAIL), gShellLevel2HiiHandle, CmdName, Dest);  
      return (SHELL_ACCESS_DENIED);
    }

    //
    // Now copy all the files under the directory...
    //
    TempName    = NULL;
    Size        = 0;
    StrnCatGrow(&TempName, &Size, Source, 0);
    StrnCatGrow(&TempName, &Size, L"\\*", 0);
    if (TempName != NULL) {
      ShellOpenFileMetaArg((CHAR16*)TempName, EFI_FILE_MODE_READ, &List);
      *TempName = CHAR_NULL;
      StrnCatGrow(&TempName, &Size, Dest, 0);
      StrnCatGrow(&TempName, &Size, L"\\", 0);
      ShellStatus = ValidateAndCopyFiles(List, TempName, SilentMode, TRUE, Resp);
      ShellCloseFileMetaArg(&List);
      SHELL_FREE_NON_NULL(TempName);
      Size = 0;
    }
  } else {
    Status = ShellDeleteFileByName(Dest);

    //
    // open file with create enabled
    //
    Status = ShellOpenFileByName(Dest, &DestHandle, EFI_FILE_MODE_READ|EFI_FILE_MODE_WRITE|EFI_FILE_MODE_CREATE, 0);
    if (EFI_ERROR(Status)) {
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CP_DEST_OPEN_FAIL), gShellLevel2HiiHandle, CmdName, Dest);  
      return (SHELL_ACCESS_DENIED);
    }

    //
    // open source file
    //
    Status = ShellOpenFileByName (Source, &SourceHandle, EFI_FILE_MODE_READ, 0);
    if (EFI_ERROR (Status)) {
      ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_CP_SRC_OPEN_FAIL), gShellLevel2HiiHandle, CmdName, Source);
      return (SHELL_ACCESS_DENIED);
    }

    //
    //get file size of source file and freespace available on destination volume
    //
    ShellGetFileSize(SourceHandle, &SourceFileSize);
    ShellGetFileSize(DestHandle, &DestFileSize);

    //
    //if the destination file already exists then it will be replaced, meaning the sourcefile effectively needs less storage space
    //
    if(DestFileSize < SourceFileSize){
      SourceFileSize -= DestFileSize;
    } else {
      SourceFileSize = 0;
    }

    //
    //get the system volume info to check the free space
    //
    DestVolumeFP = ConvertShellHandleToEfiFileProtocol(DestHandle);
    DestVolumeInfo = NULL;
    DestVolumeInfoSize = 0;
    Status = DestVolumeFP->GetInfo(
      DestVolumeFP,
      &gEfiFileSystemInfoGuid,
      &DestVolumeInfoSize,
      DestVolumeInfo
      );

    if (Status == EFI_BUFFER_TOO_SMALL) {
      DestVolumeInfo = AllocateZeroPool(DestVolumeInfoSize);
      Status = DestVolumeFP->GetInfo(
        DestVolumeFP,
        &gEfiFileSystemInfoGuid,
        &DestVolumeInfoSize,
        DestVolumeInfo
        );
    }

    //
    //check if enough space available on destination drive to complete copy
    //
    if (DestVolumeInfo!= NULL && (DestVolumeInfo->FreeSpace < SourceFileSize)) {
      //
      //not enough space on destination directory to copy file
      //
      SHELL_FREE_NON_NULL(DestVolumeInfo);
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_CPY_FAIL), gShellLevel2HiiHandle, CmdName);  
      return(SHELL_VOLUME_FULL);
    } else {
      //
      // copy data between files
      //
      Buffer = AllocateZeroPool(ReadSize);
      if (Buffer == NULL) {
        ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_OUT_MEM), gShellLevel2HiiHandle, CmdName);
        return SHELL_OUT_OF_RESOURCES;
      }
      while (ReadSize == PcdGet32(PcdShellFileOperationSize) && !EFI_ERROR(Status)) {
        Status = ShellReadFile(SourceHandle, &ReadSize, Buffer);
        if (!EFI_ERROR(Status)) {
          Status = ShellWriteFile(DestHandle, &ReadSize, Buffer);
          if (EFI_ERROR(Status)) {
            ShellStatus = (SHELL_STATUS) (Status & (~MAX_BIT));
            ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_CPY_WRITE_ERROR), gShellLevel2HiiHandle, CmdName, Dest);   
            break;
          }
        } else {
          ShellStatus = (SHELL_STATUS) (Status & (~MAX_BIT));
          ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_CPY_READ_ERROR), gShellLevel2HiiHandle, CmdName, Source);  
          break;
        }
      }
    }
    SHELL_FREE_NON_NULL(DestVolumeInfo);
  }
  
  //
  // close files
  //
  if (DestHandle != NULL) {
    ShellCloseFile(&DestHandle);
    DestHandle   = NULL;
  }
  if (SourceHandle != NULL) {
    ShellCloseFile(&SourceHandle);
    SourceHandle = NULL;
  }

  //
  // return
  //
  return ShellStatus;
}