PowerShell · adityapatwardhan · Sep 11, 2019 · Aug 8, 2019 · Aug 8, 2019 · Aug 8, 2019
diff --git a/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHost.cs b/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleHost.cs
@@ -201,7 +201,7 @@ internal static int Start(
                 if (s_cpp.ServerMode)
                 {
                     ProfileOptimization.StartProfile("StartupProfileData-ServerMode");
-                    System.Management.Automation.Remoting.Server.OutOfProcessMediator.Run(s_cpp.InitialCommand);
+                    System.Management.Automation.Remoting.Server.OutOfProcessMediator.Run(s_cpp.InitialCommand, s_cpp.WorkingDirectory);
                     exitCode = 0;
                 }
                 else if (s_cpp.NamedPipeServerMode)

diff --git a/src/System.Management.Automation/engine/hostifaces/PowerShellProcessInstance.cs b/src/System.Management.Automation/engine/hostifaces/PowerShellProcessInstance.cs
@@ -41,24 +41,38 @@ static PowerShellProcessInstance()
         }
 
         /// <summary>
+        /// Initializes a new instance of the <see cref="PowerShellProcessInstance"/> class. Initializes the underlying dotnet process class. 
         /// </summary>
-        /// <param name="powerShellVersion"></param>
-        /// <param name="credential"></param>
-        /// <param name="initializationScript"></param>
-        /// <param name="useWow64"></param>
-        public PowerShellProcessInstance(Version powerShellVersion, PSCredential credential, ScriptBlock initializationScript, bool useWow64)
+        /// <param name="powerShellVersion">Specifies the version of powershell.</param>
+        /// <param name="credential">Specifies a user account credentials.</param>
+        /// <param name="initializationScript">Specifies a script that will be executed when the powershell process is initialized.</param>
+        /// <param name="useWow64">Specifies if the powershell process will be 32-bit.</param>
+        /// <param name="workingDirectory">Specifies the initial working directory for the new powershell process.</param>
+        public PowerShellProcessInstance(Version powerShellVersion, PSCredential credential, ScriptBlock initializationScript, bool useWow64, string workingDirectory)
         {
             string processArguments = " -s -NoLogo -NoProfile";
 
+            if (!string.IsNullOrWhiteSpace(workingDirectory))
+            {
+                processArguments = string.Format(
+                    CultureInfo.InvariantCulture,
+                    "{0} -wd {1}",
+                    processArguments,
+                    workingDirectory);
+            }
+
             if (initializationScript != null)
             {
                 string scripBlockAsString = initializationScript.ToString();
                 if (!string.IsNullOrEmpty(scripBlockAsString))
                 {
                     string encodedCommand =
                         Convert.ToBase64String(Encoding.Unicode.GetBytes(scripBlockAsString));
-                    processArguments = string.Format(CultureInfo.InvariantCulture,
-                        "{0} -EncodedCommand {1}", processArguments, encodedCommand);
+                    processArguments = string.Format(
+                        CultureInfo.InvariantCulture,
+                        "{0} -EncodedCommand {1}",
+                        processArguments,
+                        encodedCommand);
                 }
             }
 
@@ -91,8 +105,20 @@ public PowerShellProcessInstance(Version powerShellVersion, PSCredential credent
         }
 
         /// <summary>
+        /// Initializes a new instance of the <see cref="PowerShellProcessInstance"/> class. Initializes the underlying dotnet process class. 
+        /// </summary>
+        /// <param name="powerShellVersion"></param>
+        /// <param name="credential"></param>
+        /// <param name="initializationScript"></param>
+        /// <param name="useWow64"></param>
+        public PowerShellProcessInstance(Version powerShellVersion, PSCredential credential, ScriptBlock initializationScript, bool useWow64) : this(powerShellVersion, credential, initializationScript, useWow64, workingDirectory: null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PowerShellProcessInstance"/> class. Default initializes the underlying dotnet process class.
         /// </summary>
-        public PowerShellProcessInstance() : this(null, null, null, false)
+        public PowerShellProcessInstance() : this(powerShellVersion: null, credential: null, initializationScript: null, useWow64: false, workingDirectory: null)
         {
         }
 

@@ -480,6 +480,13 @@ public virtual ScriptBlock InitializationScript
 
         private ScriptBlock _initScript;
 
+        /// <summary>
+        /// Gets or sets an initial working directory for the powershell background job.
+        /// </summary>
+        [Parameter]
+        [ValidateNotNullOrEmpty]
+        public string WorkingDirectory { get; set; }
+
         /// <summary>
         /// Launches the background job as a 32-bit process. This can be used on
         /// 64-bit systems to launch a 32-bit wow process for the background job.
@@ -589,6 +596,18 @@ protected override void BeginProcessing()
                 ThrowTerminatingError(errorRecord);
             }
 
+            if (WorkingDirectory != null && !Directory.Exists(WorkingDirectory))
+            {
+                    string message = StringUtil.Format(RemotingErrorIdStrings.StartJobWorkingDirectoryNotFound, WorkingDirectory);
+                    var errorRecord = new ErrorRecord(
+                        new DirectoryNotFoundException(message),
+                        "DirectoryNotFoundException",
+                        ErrorCategory.InvalidOperation,
+                        targetObject: null);
+
+                    ThrowTerminatingError(errorRecord);
+            }
+
             CommandDiscovery.AutoloadModulesWithJobSourceAdapters(this.Context, this.CommandOrigin);
 
             if (ParameterSetName == DefinitionNameParameterSet)
@@ -628,6 +647,7 @@ protected override void CreateHelpersForSpecifiedComputerNames()
             connectionInfo.InitializationScript = _initScript;
             connectionInfo.AuthenticationMechanism = this.Authentication;
             connectionInfo.PSVersion = this.PSVersion;
+            connectionInfo.WorkingDirectory = this.WorkingDirectory;
 
             RemoteRunspace remoteRunspace = (RemoteRunspace)RunspaceFactory.CreateRunspace(connectionInfo, this.Host,
                         Utils.GetTypeTableFromExecutionContextTLS());

@@ -1514,6 +1514,11 @@ internal sealed class NewProcessConnectionInfo : RunspaceConnectionInfo
         /// </summary>
         public bool RunAs32 { get; set; }
 
+        /// <summary>
+        /// Gets or sets an initial working directory for the powershell background process.
+        /// </summary>
+        public string WorkingDirectory { get; set; }
+
         /// <summary>
         /// Powershell version to execute the job in.
         /// </summary>
@@ -1590,6 +1595,7 @@ public NewProcessConnectionInfo Copy()
             NewProcessConnectionInfo result = new NewProcessConnectionInfo(_credential);
             result.AuthenticationMechanism = this.AuthenticationMechanism;
             result.InitializationScript = this.InitializationScript;
+            result.WorkingDirectory = this.WorkingDirectory;
             result.RunAs32 = this.RunAs32;
             result.PSVersion = this.PSVersion;
             result.Process = Process;

@@ -1003,7 +1003,8 @@ internal override void CreateAsync()
                 _processInstance = _connectionInfo.Process ?? new PowerShellProcessInstance(_connectionInfo.PSVersion,
                                                                                            _connectionInfo.Credential,
                                                                                            _connectionInfo.InitializationScript,
-                                                                                           _connectionInfo.RunAs32);
+                                                                                           _connectionInfo.RunAs32,
+                                                                                           _connectionInfo.WorkingDirectory);
                 if (_connectionInfo.Process != null)
                 {
                     _processCreated = false;

@@ -87,7 +87,9 @@ protected void ProcessingThreadStart(object state)
             catch (Exception e)
             {
                 PSEtwLog.LogOperationalError(
-                    PSEventId.TransportError, PSOpcode.Open, PSTask.None,
+                    PSEventId.TransportError,
+                    PSOpcode.Open,
+                    PSTask.None,
                     PSKeyword.UseAlwaysOperational,
                     Guid.Empty.ToString(),
                     Guid.Empty.ToString(),
@@ -96,7 +98,9 @@ protected void ProcessingThreadStart(object state)
                     e.StackTrace);
 
                 PSEtwLog.LogAnalyticError(
-                    PSEventId.TransportError_Analytic, PSOpcode.Open, PSTask.None,
+                    PSEventId.TransportError_Analytic,
+                    PSOpcode.Open,
+                    PSTask.None,
                     PSKeyword.Transport | PSKeyword.UseAlwaysAnalytic,
                     Guid.Empty.ToString(),
                     Guid.Empty.ToString(),
@@ -158,7 +162,9 @@ protected void OnDataPacketReceived(byte[] rawData, string stream, Guid psGuid)
 
         protected void OnDataAckPacketReceived(Guid psGuid)
         {
-            throw new PSRemotingTransportException(PSRemotingErrorId.IPCUnknownElementReceived, RemotingErrorIdStrings.IPCUnknownElementReceived,
+            throw new PSRemotingTransportException(
+                PSRemotingErrorId.IPCUnknownElementReceived,
+                RemotingErrorIdStrings.IPCUnknownElementReceived,
                 OutOfProcessUtils.PS_OUT_OF_PROC_DATA_ACK_TAG);
         }
 
@@ -301,33 +307,39 @@ protected void OnCloseAckPacketReceived(Guid psGuid)
 
         #region Methods
 
-        protected OutOfProcessServerSessionTransportManager CreateSessionTransportManager(string configurationName, PSRemotingCryptoHelperServer cryptoHelper)
+        protected OutOfProcessServerSessionTransportManager CreateSessionTransportManager(string configurationName, PSRemotingCryptoHelperServer cryptoHelper, string workingDirectory)
         {
             PSSenderInfo senderInfo;
 #if !UNIX
             WindowsIdentity currentIdentity = WindowsIdentity.GetCurrent();
-            PSPrincipal userPrincipal = new PSPrincipal(new PSIdentity(string.Empty, true, currentIdentity.Name, null),
+            PSPrincipal userPrincipal = new PSPrincipal(
+                new PSIdentity(string.Empty, true, currentIdentity.Name, null),
                 currentIdentity);
             senderInfo = new PSSenderInfo(userPrincipal, "http://localhost");
 #else
-            PSPrincipal userPrincipal = new PSPrincipal(new PSIdentity(string.Empty, true, string.Empty, null),
+            PSPrincipal userPrincipal = new PSPrincipal(
+                new PSIdentity(string.Empty, true, string.Empty, null),
                 null);
             senderInfo = new PSSenderInfo(userPrincipal, "http://localhost");
 #endif
 
             OutOfProcessServerSessionTransportManager tm = new OutOfProcessServerSessionTransportManager(originalStdOut, originalStdErr, cryptoHelper);
 
-            ServerRemoteSession srvrRemoteSession = ServerRemoteSession.CreateServerRemoteSession(senderInfo,
-                _initialCommand, tm, configurationName);
+            ServerRemoteSession.CreateServerRemoteSession(
+                senderInfo,
+                _initialCommand,
+                tm,
+                configurationName,
+                workingDirectory);
 
             return tm;
         }
 
-        protected void Start(string initialCommand, PSRemotingCryptoHelperServer cryptoHelper, string configurationName = null)
+        protected void Start(string initialCommand, PSRemotingCryptoHelperServer cryptoHelper, string workingDirectory = null, string configurationName = null)
         {
             _initialCommand = initialCommand;
 
-            sessionTM = CreateSessionTransportManager(configurationName, cryptoHelper);
+            sessionTM = CreateSessionTransportManager(configurationName, cryptoHelper, workingDirectory);
 
             try
             {
@@ -338,7 +350,7 @@ protected void Start(string initialCommand, PSRemotingCryptoHelperServer cryptoH
                     {
                         if (sessionTM == null)
                         {
-                            sessionTM = CreateSessionTransportManager(configurationName, cryptoHelper);
+                            sessionTM = CreateSessionTransportManager(configurationName, cryptoHelper, workingDirectory);
                         }
                     }
 
@@ -352,8 +364,10 @@ protected void Start(string initialCommand, PSRemotingCryptoHelperServer cryptoH
                             sessionTM = null;
                         }
 
-                        throw new PSRemotingTransportException(PSRemotingErrorId.IPCUnknownElementReceived,
-                            RemotingErrorIdStrings.IPCUnknownElementReceived, string.Empty);
+                        throw new PSRemotingTransportException(
+                            PSRemotingErrorId.IPCUnknownElementReceived,
+                            RemotingErrorIdStrings.IPCUnknownElementReceived,
+                            string.Empty);
                     }
 
                     // process data in a thread pool thread..this way Runspace, Command
@@ -366,7 +380,8 @@ protected void Start(string initialCommand, PSRemotingCryptoHelperServer cryptoH
 #else
                     ThreadPool.QueueUserWorkItem(new WaitCallback(ProcessingThreadStart), data);
 #endif
-                } while (true);
+                }
+                while (true);
             }
             catch (Exception e)
             {
@@ -468,8 +483,11 @@ private OutOfProcessMediator() : base(true)
         #region Static Methods
 
         /// <summary>
+        /// Starts the out-of-process powershell server instance.  
         /// </summary>
-        internal static void Run(string initialCommand)
+        /// <param name="initialCommand">Specifies the initialization script.</param>
+        /// <param name="workingDirectory">Specifies the initial working directory. The working directory is set before the initial command.</param>
+        internal static void Run(string initialCommand, string workingDirectory)
         {
             lock (SyncObject)
             {
@@ -486,7 +504,7 @@ internal static void Run(string initialCommand)
             // Setup unhandled exception to log events
             AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(AppDomainUnhandledException);
 #endif
-            s_singletonInstance.Start(initialCommand, new PSRemotingCryptoHelperServer());
+            s_singletonInstance.Start(initialCommand, new PSRemotingCryptoHelperServer(), workingDirectory);
         }
 
         #endregion

@@ -6,6 +6,7 @@
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Globalization;
+using System.IO;
 using System.Linq;
 using System.Management.Automation.Host;
 using System.Management.Automation.Internal;
@@ -86,6 +87,9 @@ private Dictionary<Guid, ServerPowerShellDriver> _associatedShells
         // Results in a configured remote runspace pushed onto driver host.
         private string _configurationName;
 
+        // Optional initial location of the PowerShell session
+        private readonly string _initialLocation;
+
         /// <summary>
         /// Event that get raised when the RunspacePool is closed.
         /// </summary>
@@ -120,6 +124,7 @@ private Dictionary<Guid, ServerPowerShellDriver> _associatedShells
         /// <param name="serverCapability">Server capability reported to the client during negotiation (not the actual capability).</param>
         /// <param name="psClientVersion">Client PowerShell version.</param>
         /// <param name="configurationName">Optional endpoint configuration name to create a pushed configured runspace.</param>
+        /// <param name="initialLocation">Optional initial location of the powershell.</param>
         internal ServerRunspacePoolDriver(
             Guid clientRunspacePoolId,
             int minRunspaces,
@@ -134,19 +139,21 @@ internal ServerRunspacePoolDriver(
             bool isAdministrator,
             RemoteSessionCapability serverCapability,
             Version psClientVersion,
-            string configurationName)
+            string configurationName,
+            string initialLocation)
         {
             Dbg.Assert(configData != null, "ConfigurationData cannot be null");
 
             _serverCapability = serverCapability;
             _clientPSVersion = psClientVersion;
 
             _configurationName = configurationName;
+            _initialLocation = initialLocation;
 
             // Create a new server host and associate for host call
             // integration
-            _remoteHost = new ServerDriverRemoteHost(clientRunspacePoolId,
-                Guid.Empty, hostInfo, transportManager, null);
+            _remoteHost = new ServerDriverRemoteHost(
+                clientRunspacePoolId, Guid.Empty, hostInfo, transportManager, null);
 
             _configData = configData;
             _applicationPrivateData = applicationPrivateData;
@@ -615,6 +622,13 @@ private void HandleRunspaceCreated(object sender, RunspaceCreatedEventArgs args)
                 // to ignore all but critical errors.
             }
 
+            if (!string.IsNullOrWhiteSpace(_initialLocation))
+            {
+                var setLocationCommand = new Command("Set-Location");
+                setLocationCommand.Parameters.Add(new CommandParameter("LiteralPath", _initialLocation));
+                InvokeScript(setLocationCommand, args);
+            }
+
             // Run startup scripts
             InvokeStartupScripts(args);