public unsafe static EfiLoadOption MarshalFromNative(IntPtr data)
{
var result = new EfiLoadOption();
result.Attributes = *(uint *)data;
result.FilePathListLength = *(ushort *)(data + 4);
result.Description = Marshal.PtrToStringUni(data + 6);
return(result);
}
static void Main(string[] args)
{
// Parse options
new Mono.Options.OptionSet
{
{ "y|sysprep", "Operate on SysPrep variables, not Boot Variables.", n => VariableType = UefiLoadOptionType.SysPrep },
{ "r|driver", "Operate on Driver variables, not Boot Variables.", n => VariableType = UefiLoadOptionType.Driver },
{ "v|verbose", "print additional information", n => ErrorHandling.Verbosity++ },
}.Parse(args);
if (!IsElevated)
{
Console.WriteLine("Administrative privileges are needed.");
return;
}
Privileges.EnablePrivilege(Privileges.SecurityEntity.SE_SYSTEM_ENVIRONMENT_NAME);
if (VariableType == UefiLoadOptionType.Boot)
{
ErrorHandling.HandleWarning(() => Console.WriteLine($"BootNext: {read_u16("BootNext")}"), "Could not read variable 'BootNext'", verbosity: 2);
ErrorHandling.HandleWarning(() => Console.WriteLine($"BootCurrent: {read_u16("BootCurrent"):X4}"), "Could not read variable 'BootCurrent'", verbosity: 2);
ErrorHandling.HandleWarning(() => Console.WriteLine($"Timeout : {read_u16("Timeout")}"), "Could not read variable 'Timeout'", verbosity: 2);
}
/*
* ErrorHandling.HandleWarning(() => Console.WriteLine($"{Enum.GetName(typeof(UefiLoadOptionType), VariableType)}Order: {string.Join(",", read_order(VariableType).Select(y => $"{y:X4}"))}"),
* VariableType == UefiLoadOptionType.Boot ? "No BootOrder is set; firmware will attempt recovery" : $"No { Enum.GetName(typeof(UefiLoadOptionType), VariableType)}Order is set",
* verbosity: 2);
*/
// Windows does not provide any documented function to iterate over all available firmware variables
// An undocumented function NtEnumerateBootEntries ntdll.dll returns all boot options in Windows specific struct
// It internally calls HalEnumerateEnvironmentVariablesEx from hal.dll, which actually returns all variables,
// filters them to only show Boot#### variables, and do additional parsing for convenience and Windows specific options.
var BootEntryNames = read_all_boot_entry_names();
foreach (var variableName in BootEntryNames)
{
var buffer = IntPtr.Zero;
uint size = 0;
try
{
(buffer, size) = read_dyn(variableName);
var loadOption = EfiLoadOption.MarshalFromNative(buffer);
Console.WriteLine(variableName + ((loadOption.Attributes & EfiLoadOption.LOAD_OPTION_ACTIVE) != 0 ? "* " : " ") + loadOption.Description);
}
catch (Win32Exception win32exeption)
{
if (win32exeption.NativeErrorCode == 203) //not exist, skip
{
continue;
}
}
finally
{
Marshal.FreeHGlobal(buffer);
}
}
//show_mirror??
#if DEBUG
Console.ReadLine();
#endif
}
