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Booted UEFI or BIOS
Keywords: GetFirmwareEnvironmentVariableA GetFirmwareEnvironmentVariable Get Firmware Environment Variable Detect Windows System Machine Booted UEFI Legacy BIOS
Question:
I'm looking for a way to detect if a machine was booted UEFI or legacy BIOS. I found this code that was written in Delphi and was wondering if there is a way to translate this into native Winbatch code: http://theroadtodelphi.wordpress.com/2013/02/19/how-distinguish-when-windows-was-installed-in-legacy-bios-or-uefi-mode-using-delphi/
uses
Windows,
SysUtils;
function GetFirmwareEnvironmentVariableA(lpName, lpGuid: LPCSTR; pBuffer: Pointer;
nSize: DWORD): DWORD; stdcall; external kernel32 name 'GetFirmwareEnvironmentVariableA';
begin
try
GetFirmwareEnvironmentVariableA('','{00000000-0000-0000-0000-000000000000}', nil,0);
if (GetLastError = ERROR_INVALID_FUNCTION) then
Writeln('Legacy BIOS')
else
Writeln('UEFI Boot Mode');
except
on E: Exception do
Writeln(E.ClassName, ': ', E.Message);
end;
Readln;
end.
Any help would be appreciated.
Answer:
#DefineFunction GetFirmwareType() ERROR_INVALID_FUNCTION = 1 DllCall("kernel32.dll",long:"GetFirmwareEnvironmentVariableA",lpstr:'',lpstr:'{00000000-0000-0000-0000-000000000000}', lpnull, long:0) If DllLastError() == ERROR_INVALID_FUNCTION Then Return "Legacy BIOS" Else Return "UEFI Boot Mode" #EndFunction ; Test Message("Firmware", "System firmware: ": GetFirmwareType())
Article ID: W18506
Filename: Booted UEFI or BIOS.txt
File Created: 2014:06:05:10:35:42
Last Updated: 2014:06:05:10:35:42