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/** @file
Provides application point extension for "C" style main function
Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Base.h>
#include <Protocol/SimpleFileSystem.h>
#include <Protocol/LoadedImage.h>
#include <Protocol/EfiShellInterface.h>
#include <Protocol/ShellParameters.h>
#include <Library/ShellCEntryLib.h>
#include <Library/DebugLib.h>
/**
UEFI entry point for an application that will in turn call the
ShellAppMain function which has parameters similar to a standard C
main function.
An application that uses UefiShellCEntryLib must have a ShellAppMain
function as prototyped in Include/Library/ShellCEntryLib.h.
Note that the Shell uses POSITIVE integers for error values, while UEFI
uses NEGATIVE values. If the application is to be used within a script,
it needs to return one of the SHELL_STATUS values defined in Protocol/Shell.h.
@param ImageHandle The image handle of the UEFI Application.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The application exited normally.
@retval Other An error occurred.
**/
EFI_STATUS
EFIAPI
ShellCEntryLib (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
INTN ReturnFromMain;
EFI_SHELL_PARAMETERS_PROTOCOL *EfiShellParametersProtocol;
EFI_SHELL_INTERFACE *EfiShellInterface;
EFI_STATUS Status;
ReturnFromMain = -1;
EfiShellParametersProtocol = NULL;
EfiShellInterface = NULL;
Status = SystemTable->BootServices->OpenProtocol (
ImageHandle,
&gEfiShellParametersProtocolGuid,
(VOID **)&EfiShellParametersProtocol,
ImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (!EFI_ERROR (Status)) {
//
// use shell 2.0 interface
//
ReturnFromMain = ShellAppMain (
EfiShellParametersProtocol->Argc,
EfiShellParametersProtocol->Argv
);
} else {
//
// try to get shell 1.0 interface instead.
//
Status = SystemTable->BootServices->OpenProtocol (
ImageHandle,
&gEfiShellInterfaceGuid,
(VOID **)&EfiShellInterface,
ImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (!EFI_ERROR (Status)) {
//
// use shell 1.0 interface
//
ReturnFromMain = ShellAppMain (
EfiShellInterface->Argc,
EfiShellInterface->Argv
);
} else {
ASSERT (FALSE);
}
}
return ReturnFromMain;
}
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