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/** @file
A shell application that triggers capsule update process.
Copyright (c) 2016 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "CapsuleApp.h"
UINTN Argc;
CHAR16 **Argv;
EFI_SHELL_PROTOCOL *mShellProtocol = NULL;
/**
This function parse application ARG.
@return Status
**/
EFI_STATUS
GetArg (
VOID
)
{
EFI_STATUS Status;
EFI_SHELL_PARAMETERS_PROTOCOL *ShellParameters;
Status = gBS->HandleProtocol (
gImageHandle,
&gEfiShellParametersProtocolGuid,
(VOID **)&ShellParameters
);
if (EFI_ERROR (Status)) {
return Status;
}
Argc = ShellParameters->Argc;
Argv = ShellParameters->Argv;
return EFI_SUCCESS;
}
/**
Get shell protocol.
@return Pointer to shell protocol.
**/
EFI_SHELL_PROTOCOL *
GetShellProtocol (
VOID
)
{
EFI_STATUS Status;
if (mShellProtocol == NULL) {
Status = gBS->LocateProtocol (
&gEfiShellProtocolGuid,
NULL,
(VOID **)&mShellProtocol
);
if (EFI_ERROR (Status)) {
mShellProtocol = NULL;
}
}
return mShellProtocol;
}
/**
Read a file.
@param[in] FileName The file to be read.
@param[out] BufferSize The file buffer size
@param[out] Buffer The file buffer
@retval EFI_SUCCESS Read file successfully
@retval EFI_NOT_FOUND Shell protocol or file not found
@retval others Read file failed
**/
EFI_STATUS
ReadFileToBuffer (
IN CHAR16 *FileName,
OUT UINTN *BufferSize,
OUT VOID **Buffer
)
{
EFI_STATUS Status;
EFI_SHELL_PROTOCOL *ShellProtocol;
SHELL_FILE_HANDLE Handle;
UINT64 FileSize;
UINTN TempBufferSize;
VOID *TempBuffer;
ShellProtocol = GetShellProtocol ();
if (ShellProtocol == NULL) {
return EFI_NOT_FOUND;
}
//
// Open file by FileName.
//
Status = ShellProtocol->OpenFileByName (
FileName,
&Handle,
EFI_FILE_MODE_READ
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Get the file size.
//
Status = ShellProtocol->GetFileSize (Handle, &FileSize);
if (EFI_ERROR (Status)) {
ShellProtocol->CloseFile (Handle);
return Status;
}
TempBufferSize = (UINTN)FileSize;
TempBuffer = AllocateZeroPool (TempBufferSize);
if (TempBuffer == NULL) {
ShellProtocol->CloseFile (Handle);
return EFI_OUT_OF_RESOURCES;
}
//
// Read the file data to the buffer
//
Status = ShellProtocol->ReadFile (
Handle,
&TempBufferSize,
TempBuffer
);
if (EFI_ERROR (Status)) {
ShellProtocol->CloseFile (Handle);
return Status;
}
ShellProtocol->CloseFile (Handle);
*BufferSize = TempBufferSize;
*Buffer = TempBuffer;
return EFI_SUCCESS;
}
/**
Write a file.
@param[in] FileName The file to be written.
@param[in] BufferSize The file buffer size
@param[in] Buffer The file buffer
@retval EFI_SUCCESS Write file successfully
@retval EFI_NOT_FOUND Shell protocol not found
@retval others Write file failed
**/
EFI_STATUS
WriteFileFromBuffer (
IN CHAR16 *FileName,
IN UINTN BufferSize,
IN VOID *Buffer
)
{
EFI_STATUS Status;
EFI_SHELL_PROTOCOL *ShellProtocol;
SHELL_FILE_HANDLE Handle;
EFI_FILE_INFO *FileInfo;
UINTN TempBufferSize;
ShellProtocol = GetShellProtocol ();
if (ShellProtocol == NULL) {
return EFI_NOT_FOUND;
}
//
// Open file by FileName.
//
Status = ShellProtocol->OpenFileByName (
FileName,
&Handle,
EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Empty the file contents.
//
FileInfo = ShellProtocol->GetFileInfo (Handle);
if (FileInfo == NULL) {
ShellProtocol->CloseFile (Handle);
return EFI_DEVICE_ERROR;
}
//
// If the file size is already 0, then it has been empty.
//
if (FileInfo->FileSize != 0) {
//
// Set the file size to 0.
//
FileInfo->FileSize = 0;
Status = ShellProtocol->SetFileInfo (Handle, FileInfo);
if (EFI_ERROR (Status)) {
FreePool (FileInfo);
ShellProtocol->CloseFile (Handle);
return Status;
}
}
FreePool (FileInfo);
//
// Write the file data from the buffer
//
TempBufferSize = BufferSize;
Status = ShellProtocol->WriteFile (
Handle,
&TempBufferSize,
Buffer
);
if (EFI_ERROR (Status)) {
ShellProtocol->CloseFile (Handle);
return Status;
}
ShellProtocol->CloseFile (Handle);
return EFI_SUCCESS;
}
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