system76-edk2/ShellPkg/Library/UefiShellLevel2CommandsLib/Reset.c

/** @file
  Main file for attrib shell level 2 function.

  (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
  Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "UefiShellLevel2CommandsLib.h"

STATIC CONST SHELL_PARAM_ITEM  ResetParamList[] = {
  { L"-w",    TypeValue },
  { L"-s",    TypeValue },
  { L"-c",    TypeValue },
  { L"-fwui", TypeFlag  },
  { NULL,     TypeMax   }
};

/**
  Function for 'reset' 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
ShellCommandRunReset (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS    Status;
  LIST_ENTRY    *Package;
  CONST CHAR16  *String;
  CHAR16        *ProblemParam;
  SHELL_STATUS  ShellStatus;
  UINT64        OsIndications;
  UINT32        Attr;
  UINTN         DataSize;

  ShellStatus  = SHELL_SUCCESS;
  ProblemParam = NULL;

  //
  // initialize the shell lib (we must be in non-auto-init...)
  //
  Status = ShellInitialize ();
  ASSERT_EFI_ERROR (Status);

  //
  // parse the command line
  //
  Status = ShellCommandLineParse (ResetParamList, &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"reset", ProblemParam);
      FreePool (ProblemParam);
      return (SHELL_INVALID_PARAMETER);
    } else {
      ASSERT (FALSE);
    }
  } else {
    //
    // check for "-?"
    //
    if (ShellCommandLineGetFlag (Package, L"-?")) {
      ASSERT (FALSE);
    } else if (ShellCommandLineGetRawValue (Package, 1) != NULL) {
      ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle, L"reset");
      ShellStatus = SHELL_INVALID_PARAMETER;
    } else {
      if (ShellCommandLineGetFlag (Package, L"-fwui")) {
        DataSize = sizeof (OsIndications);
        Status   = gRT->GetVariable (
                          EFI_OS_INDICATIONS_SUPPORT_VARIABLE_NAME,
                          &gEfiGlobalVariableGuid,
                          &Attr,
                          &DataSize,
                          &OsIndications
                          );
        if (!EFI_ERROR (Status)) {
          if ((OsIndications & EFI_OS_INDICATIONS_BOOT_TO_FW_UI) != 0) {
            DataSize = sizeof (OsIndications);
            Status   = gRT->GetVariable (
                              EFI_OS_INDICATIONS_VARIABLE_NAME,
                              &gEfiGlobalVariableGuid,
                              &Attr,
                              &DataSize,
                              &OsIndications
                              );
            if (!EFI_ERROR (Status)) {
              OsIndications |= EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
            } else {
              OsIndications = EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
            }

            Status = gRT->SetVariable (
                            EFI_OS_INDICATIONS_VARIABLE_NAME,
                            &gEfiGlobalVariableGuid,
                            EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
                            sizeof (OsIndications),
                            &OsIndications
                            );
          }
        }

        if (EFI_ERROR (Status)) {
          ShellStatus = SHELL_UNSUPPORTED;
          goto Error;
        }
      }

      //
      // check for warm reset flag, then shutdown reset flag, then cold (default) reset flag
      //
      if (ShellCommandLineGetFlag (Package, L"-w")) {
        if (ShellCommandLineGetFlag (Package, L"-s") || ShellCommandLineGetFlag (Package, L"-c")) {
          ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle, L"reset");
          ShellStatus = SHELL_INVALID_PARAMETER;
        } else {
          String = ShellCommandLineGetValue (Package, L"-w");
          if (String != NULL) {
            gRT->ResetSystem (EfiResetWarm, EFI_SUCCESS, StrSize (String), (VOID *)String);
          } else {
            gRT->ResetSystem (EfiResetWarm, EFI_SUCCESS, 0, NULL);
          }
        }
      } else if (ShellCommandLineGetFlag (Package, L"-s")) {
        if (ShellCommandLineGetFlag (Package, L"-c")) {
          ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle, L"reset");
          ShellStatus = SHELL_INVALID_PARAMETER;
        } else {
          String = ShellCommandLineGetValue (Package, L"-s");
          DEBUG_CODE (
            ShellPrintEx (-1, -1, L"Reset with %s (%d bytes)", String, String != NULL ? StrSize (String) : 0);
            );
          if (String != NULL) {
            gRT->ResetSystem (EfiResetShutdown, EFI_SUCCESS, StrSize (String), (VOID *)String);
          } else {
            gRT->ResetSystem (EfiResetShutdown, EFI_SUCCESS, 0, NULL);
          }
        }
      } else {
        //
        // this is default so dont worry about flag...
        //
        String = ShellCommandLineGetValue (Package, L"-c");
        if (String != NULL) {
          gRT->ResetSystem (EfiResetCold, EFI_SUCCESS, StrSize (String), (VOID *)String);
        } else {
          gRT->ResetSystem (EfiResetCold, EFI_SUCCESS, 0, NULL);
        }
      }
    }
  }

  //
  // we should never get here... so the free and return are for formality more than use
  // as the ResetSystem function should not return...
  //

Error:
  //
  // free the command line package
  //
  ShellCommandLineFreeVarList (Package);

  //
  // return the status
  //
  return (ShellStatus);
}