Initial commit: LAAPC Print Service - Windows service with multi-tray printing, IPC queue management, PDF testing support, and self-installing CLI
This commit is contained in:
Jason
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using System.Diagnostics;
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using System.ServiceProcess;
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using System.Security.Principal;
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namespace PrintServiceCLI;
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/// <summary>
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/// Manages Windows Service installation and verification
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/// </summary>
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public static class ServiceManager
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{
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private const string ServiceName = "LAAPC Print Service";
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private const string ServiceInstallPath = @"C:\ProgramData\LAAPC";
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private const string ServiceExeName = "PrintService.exe";
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private static bool? _serviceAvailable = null; // Cache result
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/// <summary>
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/// Check if service is installed and running, with auto-install option
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/// </summary>
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public static bool EnsureServiceRunning(bool silent = false)
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{
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// Return cached result if already checked
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if (_serviceAvailable.HasValue)
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return _serviceAvailable.Value;
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try
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{
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// Check if service exists and is running
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using var service = new ServiceController(ServiceName);
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service.Refresh();
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if (service.Status == ServiceControllerStatus.Running)
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{
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_serviceAvailable = true;
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return true;
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}
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// Service exists but not running - try to start it
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if (service.Status == ServiceControllerStatus.Stopped)
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{
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if (!silent)
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Console.WriteLine("Service is stopped. Starting...");
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service.Start();
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service.WaitForStatus(ServiceControllerStatus.Running, TimeSpan.FromSeconds(10));
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_serviceAvailable = true;
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return true;
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}
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_serviceAvailable = false;
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return false;
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}
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catch (InvalidOperationException)
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{
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// Service doesn't exist - offer to install
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if (silent)
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{
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_serviceAvailable = false;
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return false;
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}
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return PromptAndInstall();
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}
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catch (Exception ex)
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{
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if (!silent)
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Console.Error.WriteLine($"Error checking service: {ex.Message}");
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_serviceAvailable = false;
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return false;
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}
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}
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/// <summary>
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/// Prompt user and install service if they agree
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/// </summary>
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private static bool PromptAndInstall()
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{
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Console.WriteLine();
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Console.WriteLine("====================================================");
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Console.WriteLine("LAAPC Print Service is not installed on this PC.");
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Console.WriteLine("====================================================");
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Console.WriteLine();
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Console.WriteLine("The service must be installed locally to process print jobs.");
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Console.WriteLine("This is a one-time setup that requires administrator access.");
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Console.WriteLine();
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Console.Write("Install the service now? [Y/N]: ");
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var response = Console.ReadLine()?.Trim().ToUpper();
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if (response != "Y" && response != "YES")
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{
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Console.WriteLine("Installation cancelled. Service is required for printing.");
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_serviceAvailable = false;
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return false;
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}
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return InstallService();
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}
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/// <summary>
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/// Install and start the service with UAC elevation
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/// </summary>
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private static bool InstallService()
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{
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try
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{
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Console.WriteLine();
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Console.WriteLine("Installing service...");
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// Check if running as admin
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if (!IsAdministrator())
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{
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Console.WriteLine("Requesting administrator privileges...");
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return InstallWithElevation();
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}
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// Copy service files to local machine
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var cliPath = AppContext.BaseDirectory;
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var serviceSourcePath = Path.Combine(Path.GetDirectoryName(cliPath)!, ServiceExeName);
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if (!File.Exists(serviceSourcePath))
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{
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// Try relative path
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serviceSourcePath = Path.Combine(cliPath, "..", "PrintService", ServiceExeName);
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serviceSourcePath = Path.GetFullPath(serviceSourcePath);
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}
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if (!File.Exists(serviceSourcePath))
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{
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Console.Error.WriteLine($"ERROR: Could not find {ServiceExeName}");
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Console.Error.WriteLine($"Expected location: {serviceSourcePath}");
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_serviceAvailable = false;
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return false;
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}
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// Create installation directory
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Directory.CreateDirectory(ServiceInstallPath);
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// Copy service executable and dependencies
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var serviceDestPath = Path.Combine(ServiceInstallPath, ServiceExeName);
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CopyServiceFiles(Path.GetDirectoryName(serviceSourcePath)!, ServiceInstallPath);
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Console.WriteLine($"Files copied to: {ServiceInstallPath}");
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// Install Windows Service using sc.exe
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var scInstall = Process.Start(new ProcessStartInfo
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{
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FileName = "sc.exe",
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Arguments = $"create \"{ServiceName}\" binPath=\"{serviceDestPath}\" start=auto",
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UseShellExecute = false,
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RedirectStandardOutput = true,
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RedirectStandardError = true,
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CreateNoWindow = true
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});
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scInstall?.WaitForExit();
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if (scInstall?.ExitCode != 0)
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{
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Console.Error.WriteLine("ERROR: Failed to install service");
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_serviceAvailable = false;
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return false;
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}
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Console.WriteLine("Service installed successfully.");
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// Start the service
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Console.WriteLine("Starting service...");
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var scStart = Process.Start(new ProcessStartInfo
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{
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FileName = "sc.exe",
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Arguments = $"start \"{ServiceName}\"",
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UseShellExecute = false,
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RedirectStandardOutput = true,
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RedirectStandardError = true,
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CreateNoWindow = true
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});
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scStart?.WaitForExit();
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if (scStart?.ExitCode != 0)
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{
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Console.Error.WriteLine("WARNING: Service installed but failed to start");
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Console.Error.WriteLine("Try running: sc start \"LAAPC Print Service\"");
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_serviceAvailable = false;
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return false;
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}
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// Wait for service to be ready
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Thread.Sleep(2000);
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Console.WriteLine("Service started successfully!");
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Console.WriteLine();
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_serviceAvailable = true;
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return true;
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}
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catch (Exception ex)
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{
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Console.Error.WriteLine($"ERROR: Installation failed: {ex.Message}");
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_serviceAvailable = false;
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return false;
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}
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}
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/// <summary>
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/// Restart process with admin elevation
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/// </summary>
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private static bool InstallWithElevation()
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{
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try
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{
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var startInfo = new ProcessStartInfo
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{
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FileName = Process.GetCurrentProcess().MainModule?.FileName ?? "PrintServiceCLI.exe",
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Arguments = "--install-service",
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UseShellExecute = true,
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Verb = "runas" // Trigger UAC prompt
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};
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var process = Process.Start(startInfo);
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process?.WaitForExit();
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if (process?.ExitCode == 0)
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{
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Console.WriteLine("Service installed successfully.");
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_serviceAvailable = true;
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return true;
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}
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Console.Error.WriteLine("Installation was cancelled or failed.");
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_serviceAvailable = false;
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return false;
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}
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catch (Exception ex)
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{
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Console.Error.WriteLine($"ERROR: Could not elevate privileges: {ex.Message}");
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_serviceAvailable = false;
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return false;
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}
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}
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/// <summary>
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/// Copy service files from source to destination
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/// </summary>
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private static void CopyServiceFiles(string sourceDir, string destDir)
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{
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// Copy main executable
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var sourceExe = Path.Combine(sourceDir, ServiceExeName);
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var destExe = Path.Combine(destDir, ServiceExeName);
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File.Copy(sourceExe, destExe, overwrite: true);
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// Copy all DLLs and config files
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foreach (var file in Directory.GetFiles(sourceDir))
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{
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var fileName = Path.GetFileName(file);
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var ext = Path.GetExtension(file).ToLower();
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if (ext == ".dll" || ext == ".json" || ext == ".config")
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{
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var destFile = Path.Combine(destDir, fileName);
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File.Copy(file, destFile, overwrite: true);
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}
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}
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// Create necessary folders
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var capturesPath = Path.Combine(destDir, "Captures");
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var queuePath = Path.Combine(destDir, "Queue");
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var archivePath = Path.Combine(destDir, "Archive");
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var errorPath = Path.Combine(destDir, "Error");
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var outputPath = Path.Combine(destDir, "Output");
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Directory.CreateDirectory(capturesPath);
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Directory.CreateDirectory(queuePath);
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Directory.CreateDirectory(archivePath);
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Directory.CreateDirectory(errorPath);
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Directory.CreateDirectory(outputPath);
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}
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/// <summary>
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/// Check if running with administrator privileges
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/// </summary>
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private static bool IsAdministrator()
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{
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using var identity = WindowsIdentity.GetCurrent();
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var principal = new WindowsPrincipal(identity);
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return principal.IsInRole(WindowsBuiltInRole.Administrator);
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}
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}
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