/** @file
  Main file for attrib shell level 2 function.

  (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
  Copyright (c) 2009 - 2011, 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.

**/

#include "UefiShellLevel2CommandsLib.h"

// This function was from from the BdsLib implementation in
// IntelFrameworkModulePkg\Library\GenericBdsLib\BdsConnect.c
// function name: BdsLibConnectAllEfi
/**
  This function will connect all current system handles recursively. The
  connection will finish until every handle's child handle created if it have.

  @retval EFI_SUCCESS           All handles and it's child handle have been
                                connected
  @retval EFI_STATUS            Return the status of gBS->LocateHandleBuffer().

**/
EFI_STATUS
ConnectAllEfi (
  VOID
  )
{
  EFI_STATUS  Status;
  UINTN       HandleCount;
  EFI_HANDLE  *HandleBuffer;
  UINTN       Index;

  Status = gBS->LocateHandleBuffer (
                  AllHandles,
                  NULL,
                  NULL,
                  &HandleCount,
                  &HandleBuffer
                 );
  if (EFI_ERROR (Status)) {
    return Status;
  }

  for (Index = 0; Index < HandleCount; Index++) {
    Status = gBS->ConnectController (HandleBuffer[Index], NULL, NULL, TRUE);
  }

  if (HandleBuffer != NULL) {
    FreePool (HandleBuffer);
  }

  return EFI_SUCCESS;
}

/**
  function to load a .EFI driver into memory and possible connect the driver.

  if FileName is NULL then ASSERT.

  @param[in] FileName           FileName of the driver to load
  @param[in] Connect            Whether to connect or not

  @retval EFI_SUCCESS           the driver was loaded and if Connect was
                                true then connect was attempted. Connection may
                                have failed.
  @retval EFI_OUT_OF_RESOURCES  there was insufficient memory
**/
EFI_STATUS
LoadDriver(
  IN CONST CHAR16   *FileName,
  IN CONST BOOLEAN  Connect
  )
{
  EFI_HANDLE                    LoadedDriverHandle;
  EFI_STATUS                    Status;
  EFI_DEVICE_PATH_PROTOCOL      *FilePath;
  EFI_LOADED_IMAGE_PROTOCOL     *LoadedDriverImage;

  LoadedDriverImage   = NULL;
  FilePath            = NULL;
  LoadedDriverHandle  = NULL;
  Status              = EFI_SUCCESS;

  ASSERT (FileName != NULL);

  //
  // Fix local copies of the protocol pointers
  //
  Status = CommandInit();
  ASSERT_EFI_ERROR(Status);

  //
  // Convert to DEVICE_PATH
  //
  FilePath = gEfiShellProtocol->GetDevicePathFromFilePath(FileName);

  if (FilePath == NULL) {
    ASSERT(FALSE);
    return (EFI_INVALID_PARAMETER);
  }

  //
  // Use LoadImage to get it into memory
  //
  Status = gBS->LoadImage(
    FALSE,
    gImageHandle,
    FilePath,
    NULL,
    0,
    &LoadedDriverHandle);

  if (EFI_ERROR(Status)) {
    ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_LOAD_NOT_IMAGE), gShellLevel2HiiHandle, FileName, Status);
  } else {
    //
    // Make sure it is a driver image
    //
    Status = gBS->HandleProtocol (LoadedDriverHandle, &gEfiLoadedImageProtocolGuid, (VOID *) &LoadedDriverImage);

    ASSERT (LoadedDriverImage != NULL);

    if ( EFI_ERROR(Status)
      || ( LoadedDriverImage->ImageCodeType != EfiBootServicesCode
        && LoadedDriverImage->ImageCodeType != EfiRuntimeServicesCode)
     ){
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_LOAD_NOT_DRIVER), gShellLevel2HiiHandle, FileName);

      //
      // Exit and unload the non-driver image
      //
      gBS->Exit(LoadedDriverHandle, EFI_INVALID_PARAMETER, 0, NULL);
      Status = EFI_INVALID_PARAMETER;
    }
  }

  if (!EFI_ERROR(Status)) {
    //
    // Start the image
    //
    Status = gBS->StartImage(LoadedDriverHandle, NULL, NULL);
    if (EFI_ERROR(Status)) {
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_LOAD_ERROR), gShellLevel2HiiHandle, FileName, Status);
    } else {
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_LOAD_LOADED), gShellLevel2HiiHandle, FileName, LoadedDriverImage->ImageBase, Status);
    }
  }

  if (!EFI_ERROR(Status) && Connect) {
    //
    // Connect it...
    //
    Status = ConnectAllEfi();
  }

  //
  // clean up memory...
  //
  if (FilePath != NULL) {
    FreePool(FilePath);
  }

  return (Status);
}

STATIC CONST SHELL_PARAM_ITEM LoadParamList[] = {
  {L"-nc", TypeFlag},
  {NULL, TypeMax}
  };

/**
  Function for 'load' command.

  @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
**/
SHELL_STATUS
EFIAPI
ShellCommandRunLoad (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS          Status;
  LIST_ENTRY          *Package;
  CHAR16              *ProblemParam;
  SHELL_STATUS        ShellStatus;
  UINTN               ParamCount;
  EFI_SHELL_FILE_INFO *ListHead;
  EFI_SHELL_FILE_INFO *Node;

  ListHead            = NULL;
  ProblemParam        = NULL;
  ShellStatus         = SHELL_SUCCESS;

  //
  // initialize the shell lib (we must be in non-auto-init...)
  //
  Status = ShellInitialize();
  ASSERT_EFI_ERROR(Status);

  //
  // parse the command line
  //
  Status = ShellCommandLineParse (LoadParamList, &Package, &ProblemParam, TRUE);
  if (EFI_ERROR(Status)) {
    if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel2HiiHandle, L"load", ProblemParam);  
      FreePool(ProblemParam);
      ShellStatus = SHELL_INVALID_PARAMETER;
    } else {
      ASSERT(FALSE);
    }
  } else {
    //
    // check for "-?"
    //
    if (ShellCommandLineGetFlag(Package, L"-?")) {
      ASSERT(FALSE);
    } else if (ShellCommandLineGetRawValue(Package, 1) == NULL) {
      //
      // we didnt get a single file to load parameter
      //
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel2HiiHandle, L"load");  
      ShellStatus = SHELL_INVALID_PARAMETER;
    } else {
      for ( ParamCount = 1
          ; ShellCommandLineGetRawValue(Package, ParamCount) != NULL
          ; ParamCount++
         ){
        Status = ShellOpenFileMetaArg((CHAR16*)ShellCommandLineGetRawValue(Package, ParamCount), EFI_FILE_MODE_READ, &ListHead);
        if (!EFI_ERROR(Status)) {
          for ( Node = (EFI_SHELL_FILE_INFO *)GetFirstNode(&ListHead->Link)
              ; !IsNull(&ListHead->Link, &Node->Link)
              ; Node = (EFI_SHELL_FILE_INFO *)GetNextNode(&ListHead->Link, &Node->Link)
             ){
            //
            // once we have an error preserve that value, but finish the loop.
            //
            if (EFI_ERROR(Status)) {
              LoadDriver(Node->FullName, (BOOLEAN)(ShellCommandLineGetFlag(Package, L"-nc")==FALSE));
            } else {
              Status = LoadDriver(Node->FullName, (BOOLEAN)(ShellCommandLineGetFlag(Package, L"-nc")==FALSE));
            }
          } // for loop for multi-open
          if (EFI_ERROR(Status)) {
            ShellCloseFileMetaArg(&ListHead);
          } else {
            Status = ShellCloseFileMetaArg(&ListHead);;
          }
        } else {
          //
          // no files found.
          //
          ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_FILE_NF), gShellLevel2HiiHandle, L"load", (CHAR16*)ShellCommandLineGetRawValue(Package, ParamCount));  
          ShellStatus = SHELL_NOT_FOUND;
        }
      } // for loop for params
    }

    //
    // free the command line package
    //
    ShellCommandLineFreeVarList (Package);
  }

  if (EFI_ERROR(Status) && ShellStatus == SHELL_SUCCESS) {
    ShellStatus = SHELL_DEVICE_ERROR;
  }

  return (ShellStatus);
}