internal static extern bool AdjustTokenPrivileges(SafeHandle TokenHandle,
[MarshalAs(UnmanagedType.Bool)]bool DisableAllPrivileges,
ref TOKEN_PRIVILEGES NewState,
Int32 BufferLength,
//ref TOKEN_PRIVILEGES PreviousState, !! for some reason this won't accept null
IntPtr PreviousState,
IntPtr ReturnLength);
public static SafeFileHandle GetHandle(this FileSystemInfo dir)
{
bool success;
SafeHandleImpl token;
TOKEN_PRIVILEGES tokenPrivileges = new TOKEN_PRIVILEGES();
tokenPrivileges.Privileges = new LUID_AND_ATTRIBUTES[1];
SafeHandle processHandle = Kernel32.GetCurrentProcess();
success = Advapi32.OpenProcessToken(
processHandle,
Constants.TOKEN_ADJUST_PRIVILEGES,
out token);
if (success)
{
// null for local system
success = Advapi32.LookupPrivilegeValue(null, Constants.SE_BACKUP_NAME,
out tokenPrivileges.Privileges[0].Luid);
if (success)
{
tokenPrivileges.PrivilegeCount = 1;
tokenPrivileges.Privileges[0].Attributes = Constants.SE_PRIVILEGE_ENABLED;
success = Advapi32.AdjustTokenPrivileges(
token,
false,
ref tokenPrivileges,
Marshal.SizeOf(tokenPrivileges),
IntPtr.Zero,
IntPtr.Zero);
}
token.Close();
}
SafeFileHandle h = Kernel32.CreateFile(
dir.FullName,
Constants.GENERIC_WRITE,
Constants.FILE_SHARE_READ | Constants.FILE_SHARE_WRITE,
0,
(uint)FileMode.Open,
Constants.FILE_FLAG_BACKUP_SEMANTICS | Constants.FILE_FLAG_OPEN_REPARSE_POINT,
(int)IntPtr.Zero
);
return h;
}