Source code for checkpath.cs

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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using System.Linq;
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using System.Management;
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using System.Windows.Forms;
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namespace RobvanderWoude
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{
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	internal class CheckPath
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	{
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		static string progver = "1.00";
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		static int Main( string[] args )
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		{
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			#region Parse Command Line
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```

			// Only 3 valid arguments are checked, invalid arguments are ignored

			if ( args.Contains( "/?", StringComparer.InvariantCultureIgnoreCase ) )

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			{
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				return ShowHelp( );
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			}
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			bool quiet = args.Contains( "/quiet", StringComparer.InvariantCultureIgnoreCase ) || args.Contains( "/q", StringComparer.InvariantCultureIgnoreCase );

			bool verbose = args.Contains( "/verbose", StringComparer.InvariantCultureIgnoreCase ) || args.Contains( "/v", StringComparer.InvariantCultureIgnoreCase );

```
 
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			#endregion Parse Command Line
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			#region Initialize Variables
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			ConsoleColor fgcolor;
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			string[] PATH;
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			int errors = 0;
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			int notexist = 0;
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			int empty = 0;
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			#endregion Initialize Variables
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			#region System PATH
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			Console.WriteLine( );
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			Console.WriteLine( "System PATH" );
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			Console.WriteLine( "===========" );
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			string query = @"SELECT * FROM Win32_Environment WHERE Name='PATH' AND SystemVariable=TRUE";

			ManagementObjectSearcher searcher = new ManagementObjectSearcher( "root\\CIMV2", query );

			ManagementObjectCollection colItems = searcher.Get( );

			foreach ( ManagementObject item in colItems )

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			{
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				if ( verbose )
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				{
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					Console.ForegroundColor = ConsoleColor.White;

					Console.WriteLine( "PATH={0}", item["VariableValue"] );

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					Console.ResetColor( );
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					Console.WriteLine( );
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				}
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				PATH = item["VariableValue"].ToString( ).Split( ';' );

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				foreach ( string folder in PATH )
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				{
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					if ( string.IsNullOrWhiteSpace( folder ) )

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					{
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						Console.ForegroundColor = ConsoleColor.Red;

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						Console.WriteLine( "<empty>" );
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						Console.ResetColor( );
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						errors++;
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						empty++;
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					}
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					else
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					{
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						if ( Directory.Exists( Environment.ExpandEnvironmentVariables( folder ) ) )

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						{
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							fgcolor = ConsoleColor.Green;
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						}
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						else
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						{
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							fgcolor = ConsoleColor.Red;
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							errors++;
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							notexist++;
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						}
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						Console.ForegroundColor = fgcolor;

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						Console.WriteLine( folder );
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					}
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				}
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				Console.ResetColor( );
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			}
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			Console.WriteLine( );
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			#endregion System PATH
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			#region User PATH
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			Console.WriteLine( );
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			Console.WriteLine( "User PATH" );
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			Console.WriteLine( "=========" );
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			query = string.Format( @"SELECT * FROM Win32_Environment WHERE Name='PATH' AND UserName='{0}\\{1}'", Environment.GetEnvironmentVariable( "ComputerName" ), Environment.UserName );

			searcher = new ManagementObjectSearcher( "root\\CIMV2", query );

```
			colItems = searcher.Get( );
```

			foreach ( ManagementObject item in colItems )

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			{
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				if ( verbose )
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				{
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					Console.ForegroundColor = ConsoleColor.White;

					Console.WriteLine( "PATH={0}", item["VariableValue"] );

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					Console.ResetColor( );
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					Console.WriteLine( );
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				}
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				PATH = item["VariableValue"].ToString( ).Split( ';' );

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				foreach ( string folder in PATH )
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				{
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					if ( string.IsNullOrWhiteSpace( folder ) )

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					{
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						Console.ForegroundColor = ConsoleColor.Red;

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						Console.WriteLine( "<empty>" );
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						Console.ResetColor( );
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						errors++;
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						empty++;
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					}
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					else
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					{
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						if ( Directory.Exists( Environment.ExpandEnvironmentVariables( folder ) ) )

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						{
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							fgcolor = ConsoleColor.Green;
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						}
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						else
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						{
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							fgcolor = ConsoleColor.Red;
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							errors++;
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							notexist++;
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						}
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						Console.ForegroundColor = fgcolor;

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						Console.WriteLine( folder );
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					}
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				}
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				Console.ResetColor( );
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			}
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			Console.WriteLine( );
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			#endregion User PATH
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			#region Error Warning
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			if ( verbose)
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			{
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				if ( empty > 0)
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				{
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					fgcolor = ConsoleColor.Red;
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				}
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				else
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				{
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					fgcolor= ConsoleColor.Green;
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				}
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				Console.ForegroundColor = fgcolor;
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				Console.Write( "\n{0} empty", empty );

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				Console.ResetColor( );
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				Console.Write( " and " );
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				if ( notexist > 0 )
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				{
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					fgcolor = ConsoleColor.Red;
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				}
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				else
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				{
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					fgcolor = ConsoleColor.Green;
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				}
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				Console.ForegroundColor = fgcolor;
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				Console.Write( "{0} non existing", notexist );

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				Console.ResetColor( );
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				Console.WriteLine( " PATH entries were found.\n" );

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			}
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			if ( !quiet && errors > 0 )
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			{
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				string message = string.Empty;
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				if ( empty > 0 && notexist == 0 )
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				{
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					message = string.Format( "{0} empty PATH entr{1} found.", empty, ( empty == 1 ? "y was" : "ies were" ) );

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				}
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				else if ( empty == 0 && notexist > 0 )

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				{
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					message = string.Format( "{0} non existing PATH entr{1} found.", notexist, ( notexist == 1 ? "y was" : "ies were" ) );

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				}
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				else
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				{
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					message = string.Format( "{0} empty and {1} non existing PATH entries were found.", empty, notexist );

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				}
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				message += "\n\nIn the \"System Properties\" window, \"Advanced\" tab, click the \"Environment ";

				message += string.Format( "Variables\" button and correct the error{0}", ( errors == 1 ? "" : "s" ) );

				string title = string.Format( "Correct {0} error{1}", errors, ( errors == 1 ? "" : "s" ) );

				DialogResult answer = MessageBox.Show( message, title, MessageBoxButtons.OKCancel, MessageBoxIcon.Error );

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				if ( answer == DialogResult.OK )
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				{
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					try
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					{
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						Process.Start( "SystemPropertiesAdvanced.exe" ).WaitForExit( );

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					}
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					catch ( Exception )
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					{
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						// With RunDLL32 we don't WaitForExit, as it exits immediately after launching the Control Panel applet

						Process.Start( "RunDLL32.exe", "Shell32.dll,Control_RunDLL SYSDM.CPL,@0,3" );

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					}
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				}
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			}
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			#endregion Error Warning
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			return errors;
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		}
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		static int ShowHelp( params string[] errmsg )

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		{
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			#region Error Message
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			if ( errmsg.Length > 0 )
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			{
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				List<string> errargs = new List<string>( errmsg );

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				errargs.RemoveAt( 0 );
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				Console.Error.WriteLine( );
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				Console.ForegroundColor = ConsoleColor.Red;

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				Console.Error.Write( "ERROR:\t" );
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				Console.ForegroundColor = ConsoleColor.White;

				Console.Error.WriteLine( errmsg[0], errargs.ToArray( ) );

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				Console.ResetColor( );
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			}
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			#endregion Error Message
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			#region Help Text
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```
```
			/*
```
```
			CheckPath.exe,  Version 1.00
```

			Check if all directories in the PATH variable(s) really exist

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```

			Usage:    CheckPath.exe  [ /Quiet ]  [ /Verbose ]  [ /? ]

```
 
```

			Where:    /Quiet     skips the popup message when errors are found

			          /Verbose   shows extra information, i.e. full PATH variables

			          /?         shows this help screen

```
 
```

			Notes:    Each directory in the System PATH and the User PATH will be checked.

			          If it exists, its name is displayed in green, otherwise in red.

			          A counter keeps track of errors, i.e. empty PATH entries as well as

			          directories that don't exist, and its count is used as the program's

```
			          return code.
```

			          Unless the /Quiet switch is used, a popup message will show the number

			          of errors detected, if any, and explain how to correct this.

			          If "OK" is clicked, the "System Properties" settings window's

			          "Advanced" tab is opened: click its "Environment Variables" button and

			          correct the errors. If "Cancel" is clicked, no settings window is

			          opened, and the program terminates.

```
 
```
```
			Written by Rob van der Woude
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			https://www.robvanderwoude.com
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			*/
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			Console.Error.WriteLine( );
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			Console.Error.WriteLine( "CheckPath.exe,  Version {0}", progver );

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			Console.Error.WriteLine( "Check if all directories in the PATH variable(s) really exist" );

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			Console.Error.WriteLine( );
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			Console.Error.Write( "Usage:    " );
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			Console.ForegroundColor = ConsoleColor.White;

			Console.Error.WriteLine( "CheckPath.exe  [ /Quiet ]  [ /Verbose ]  [ /? ]" );

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			Console.ResetColor( );
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			Console.Error.WriteLine( );
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			Console.Error.Write( "Where:    " );
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			Console.ForegroundColor = ConsoleColor.White;

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			Console.Error.Write( "/Q" );
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			Console.ResetColor( );
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			Console.Error.WriteLine( "uiet     skips the popup message when errors are found" );

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			Console.ForegroundColor = ConsoleColor.White;

			Console.Error.Write( "          /V" );

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			Console.ResetColor( );
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			Console.Error.WriteLine( "erbose   shows extra information, i.e. full PATH variables" );

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			Console.ForegroundColor = ConsoleColor.White;

			Console.Error.Write( "          /?" );

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			Console.ResetColor( );
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			Console.Error.WriteLine( "         shows this help screen" );

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			Console.Error.WriteLine( );
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			Console.Error.WriteLine( "Notes:    Each directory in the System PATH and the User PATH will be checked." );

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			Console.Error.Write( "          If it exists, its name is displayed in " );

			Console.ForegroundColor = ConsoleColor.Green;

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			Console.Error.Write( "green" );
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			Console.ResetColor( );
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			Console.Error.Write( ", otherwise in " );

			Console.ForegroundColor = ConsoleColor.Red;

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			Console.Error.Write( "red" );
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			Console.ResetColor( );
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			Console.Error.WriteLine( "." );
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			Console.Error.WriteLine( "          A counter keeps track of errors, i.e. empty PATH entries as well as" );

```
 
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			Console.Error.WriteLine( "          directories that don't exist, and its count is used as the program's" );

```
 
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			Console.Error.WriteLine( "          return code." );

```
 
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			Console.Error.Write( "          Unless the " );

			Console.ForegroundColor = ConsoleColor.White;

```
			Console.Error.Write( "/Q" );
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			Console.ResetColor( );
```

			Console.Error.WriteLine( "uiet switch is used, a popup message will show the number" );

```
 
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			Console.Error.WriteLine( "          of errors detected, if any, and explain how to correct this." );

```
 
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			Console.Error.WriteLine( "          If \"OK\" is clicked, the \"System Properties\" settings window's" );

```
 
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			Console.Error.WriteLine( "          \"Advanced\" tab is opened: click its \"Environment Variables\" button and" );

```
 
```

			Console.Error.WriteLine( "          correct the errors. If \"Cancel\" is clicked, no settings window is" );

```
 
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			Console.Error.WriteLine( "          opened, and the program terminates." );

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

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

```
 
```
```
			#endregion Help Text
```
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```
```
			return -1;
```
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		}
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	}
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}
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```