audk/MdeModulePkg/Application/CapsuleApp/AppSupport.c

248 lines
6.2 KiB
C

/** @file
A shell application that triggers capsule update process.
Copyright (c) 2016 - 2017, 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 <Uefi.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Protocol/SimpleFileSystem.h>
#include <Protocol/ShellParameters.h>
#include <Protocol/Shell.h>
#include <Guid/FileInfo.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;
}