This file is indexed.

/usr/include/efi/efi.h is in gnu-efi 3.0.2-1ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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/*++

Copyright (c) 1998  Intel Corporation

Module Name:

    efi.h

Abstract:

    Public EFI header files



Revision History

--*/

//
// Build flags on input
//  EFI32
//  EFI_DEBUG               - Enable debugging code
//  EFI_NT_EMULATOR         - Building for running under NT
//


#ifndef _EFI_INCLUDE_
#define _EFI_INCLUDE_

#define EFI_FIRMWARE_VENDOR         L"INTEL"
#define EFI_FIRMWARE_MAJOR_REVISION 12
#define EFI_FIRMWARE_MINOR_REVISION 33
#define EFI_FIRMWARE_REVISION ((EFI_FIRMWARE_MAJOR_REVISION <<16) | (EFI_FIRMWARE_MINOR_REVISION))

#include "efibind.h"
#include "efidef.h"
#include "efidevp.h"
#include "efipciio.h"
#include "efiprot.h"
#include "eficon.h"
#include "efiser.h"
#include "efi_nii.h"
#include "efipxebc.h"
#include "efinet.h"
#include "efiapi.h"
#include "efifs.h"
#include "efierr.h"
#include "efiui.h"
#include "efiip.h"
#include "efiudp.h"
#include "efitcp.h"
#include "efipoint.h"

#endif