Source code for bootstate.cs

using System;

using System.Management;

using Microsoft.Win32;

namespace RobvanderWoude

{

	class BootState

	{

		static string progver = "1.00";

		static int Main( string[] args )

		{

			if ( args.Length > 0 )

			{

				return ShowHelp( );

			}

			// Check for Windows PE first

			foreach ( string regkey in Registry.LocalMachine.OpenSubKey( @"SYSTEM\ControlSet001\Control" ).GetSubKeyNames( ) )

			{

				if ( regkey.ToUpper( ) == "MININT" )

				{

					Console.Write( "Windows PE" );

					return 3;

				}

			}

			// Check "regular" boot modes

			string[] bootupstates = new string[] { "Normal boot", "Fail-safe boot", "Fail-safe with network boot" };

			ManagementObjectSearcher searcher = new ManagementObjectSearcher( "SELECT BootupState FROM Win32_ComputerSystem" );

			foreach ( ManagementObject item in searcher.Get( ) )

			{

				string bootupstate = item["BootupState"].ToString( );

				Console.Write( bootupstate.Replace( "Fail-safe", "Safe mode" ).Replace( " boot", "" ) );

				for ( int i = 0; i < bootupstates.Length; i++ )

				{

					if ( bootupstate.ToUpper( ) == bootupstates[i].ToUpper( ) )

					{

						return i;

					}

				}

			}

			// Return error if boot mode not determined

			Console.Write( "Unknown" );

			return -1;

		}

		static int ShowHelp( )

		{

			Console.Error.WriteLine( );

			Console.Error.WriteLine( "BootState.exe,  Version {0}", progver );

			Console.Error.WriteLine( "Show Windows' boot state" );

			Console.Error.WriteLine( );

			Console.Error.WriteLine( "Usage:    BootState.exe" );

			Console.Error.WriteLine( );

			Console.Error.WriteLine( "Notes:    Boot state is returned both as a string and as return code:" );

			Console.Error.WriteLine( "              \"Normal\"                    (rc = 0)" );

			Console.Error.WriteLine( "              \"Safe mode\"                 (rc = 1)" );

			Console.Error.WriteLine( "              \"Safe mode with network\"    (rc = 2)" );

			Console.Error.WriteLine( "              \"Windows PE\"                (rc = 3)" );

			Console.Error.WriteLine( "          In case of (command line) errors, the return code will be -1." );

			Console.Error.WriteLine( );

			Console.Error.WriteLine( "Credits:  Windows PE detection based on a tip by Mitch Tulloch" );

			Console.ForegroundColor = ConsoleColor.DarkGray;

			Console.Error.WriteLine( "          http://techgenix.com/HowtodetectwhetheryouareinWindowsPE/" );

			Console.ResetColor( );

			Console.Error.WriteLine( );

			Console.Error.WriteLine( "Written by Rob van der Woude" );

			Console.Error.WriteLine( "http://www.robvanderwoude.com" );

			return -1;

		}

	}

}