ProcessManager.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / infocard / Service / managed / Microsoft / InfoCards / ProcessManager.cs / 1 / ProcessManager.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
namespace Microsoft.InfoCards
{ 
    using System;
    using System.IO; 
    using System.Text; 
    using Microsoft.Win32;
    using System.Diagnostics; // Process 
    using System.Collections.Generic;
    using System.Security.Principal; //WindowsIdentity
    using System.Runtime.CompilerServices;
    using System.Runtime.InteropServices; 
    using System.ComponentModel;
    using Microsoft.InfoCards; 
    using Microsoft.InfoCards.Diagnostics; 
    using IDT = Microsoft.InfoCards.Diagnostics.InfoCardTrace;
    // 
    // Summary:
    // Manages a collection of processes. Uses a job object where possible, and otherwise manages
    // the collection of processes itself.
    // 
    class ProcessManager : IDisposable
    { 
        const int WindowsVistaMajorVersion     = 6; 
        const string s_OnScreenKeyboardExeName = "osk";
        const string s_SwitcherExeName         = "msswchx"; 
        const string s_TcserverExeName         = "tcserver";

        //
        // Job handle to use if possible. Triggered off the user being on the console session 
        //
        SafeJobHandle   m_hJob; 
 
        //
        // List of processes to manage. 
        //
        List   m_processList;
        //
        // The users ts session id. 
        //
        uint            m_userSessionId; 
 
        //
        // The name of the trusted User Sid 
        //
        private string m_trustedUserSid;

        // 
        // Summary:
        // Construct a process manager for the given session. 
        // 
        public ProcessManager( int userSessionId, string trustedUserSid )
        { 
            m_hJob = null;
            m_userSessionId = (uint) userSessionId;
            m_processList = new List();
            m_trustedUserSid = trustedUserSid; 
        }
 
        internal bool IsConsoleOrVista 
        {
            get 
            {
                return ( m_userSessionId == NativeMethods.WTSGetActiveConsoleSessionId()
                         || Environment.OSVersion.Version.Major >= WindowsVistaMajorVersion ) ;
            } 
        }
 
        internal bool IsXPTablet 
        {
            get 
            {
                return ((Environment.OSVersion.Version.Major < WindowsVistaMajorVersion) &&
                         (0 != NativeMethods.GetSystemMetrics( NativeMethods.SM_TABLETPC )));
            } 
        }
 
        // Summary: 
        //  Spawns/creates the indicated process and then adds it to a job.
        // The job is created if needed. We add all the processes launched on 
        // the secure desktop to a job as this allows us to easily terminate
        // the job when we need to switch back to the user desktop and stop/kill
        // all the processes we launched on the user desktop easily.
        // 
        // Parameters:
        //  hTrustedUserToken - Token with the trusted user SID allowed to be owner. 
        //  trustedUserSid    - Stringized SID, used in the ACL for the process. 
        //  infocardDesktop   - Desktop to launch the apps on.
        //  userIdentity      - Identity of caller. 
        //  fullpath          - fullpath to the application being launched.
        //
        public void AddProcess(         SafeNativeHandle hTrustedUserToken,
                                        ref string trustedUserSid, 
                                        string infocardDesktop,
                                        uint userProcessId, 
                                        WindowsIdentity userIdentity, 
                                        string fullPath,
                                        string commandLine, 
                                        bool fUseElevatedToken )
        {
            IntPtr processHandle = IntPtr.Zero;
            int processId = 0; 

            bool mustRelease = false; 
            bool releaseJob  = false; 
            RuntimeHelpers.PrepareConstrainedRegions();
            try 
            {

                if( IsConsoleOrVista && null == m_hJob )
                { 
                    m_hJob = Utility.CreateJobObjectWithSdHelper( trustedUserSid );
                    if( null == m_hJob ) 
                    { 
                        throw IDT.ThrowHelperError( new Win32Exception( Marshal.GetLastWin32Error() ));
                    } 
                }

                //
                // CreateJobObject will return NULL in case of failure 
                //
                hTrustedUserToken.DangerousAddRef( ref mustRelease ); 
                IntPtr trustedUserToken = hTrustedUserToken.DangerousGetHandle(); 
                IntPtr handleJob = IntPtr.Zero;
                if( IsConsoleOrVista ) 
                {
                    m_hJob.DangerousAddRef( ref releaseJob );

                    handleJob = m_hJob.DangerousGetHandle(); 
                }
 
                // 
                // The process is assigned to the job if a job is passed in.
                // 
                int error = (int) NativeMcppMethods.CreateProcessAsTrustedUserWrapper(
                                       fullPath,
                                       (null == commandLine) ? "" : commandLine,
                                       userProcessId, 
                                       infocardDesktop,
                                       userIdentity.Name, 
                                       m_userSessionId, 
                                       ref trustedUserToken,
                                       ref processHandle, 
                                       ref processId,
                                       handleJob,
                                       ref trustedUserSid,
                                       fUseElevatedToken ); 

 
                if( 0 == error ) 
                {
                    using( SafeNativeHandle hProcess = new SafeNativeHandle( processHandle, true ) ) 
                    {
                        if( !IsConsoleOrVista )
                        {
                            m_processList.Add( Process.GetProcessById( processId ) ); 
                        }
                        hProcess.Dispose(); 
                        IDT.TraceDebug( "ICARDACCESS:{0} launched for user {1}", fullPath, userIdentity.User.Value ); 
                    }
 
                }
                else
                {
                   IDT.TraceDebug( "ICARDACCESS:Failed to create process with error {0}", error ); 
                }
 
            } 
            finally
            { 
               if ( mustRelease )
               {
                   hTrustedUserToken.DangerousRelease();
               } 
               if( releaseJob )
               { 
                   m_hJob.DangerousRelease(); 
               }
            } 
        }

        public void Dispose()
        { 
            using( SystemIdentity lsa = new SystemIdentity( false ) )
            { 
 
                if( IsConsoleOrVista )
                { 
                    if( null != m_hJob )
                    {
                        m_hJob.Dispose();
                        m_hJob = null; 
                    }
                } 
                else 
                {
                    // 
                    // Used to indicate that the on screen keyboard switcher
                    // watching exe needs to be killed.
                    //
                    bool fKillSwitcher = false; 

                    for( int i = 0; i < m_processList.Count; i++ ) 
                    { 
                        Process p = m_processList[ i ];
 
                        if( !p.HasExited )
                        {
                            try
                            { 
                                if( m_userSessionId == p.SessionId )
                                { 
                                    if( 0 == String.Compare( 
                                                        p.ProcessName,
                                                        s_OnScreenKeyboardExeName, 
                                                        StringComparison.OrdinalIgnoreCase ) )
                                    {
                                        //
                                        // We need to kill the msswchx.exe. 
                                        //
                                        fKillSwitcher = true; 
                                    } 

                                    // 
                                    // Utility will handle exceptions correctly.
                                    //
                                    Utility.KillHelper( p );
                                } 
                            }
                            catch( InvalidOperationException ) 
                            { 
                                //
                                // If the process has already terminated then, we can get 
                                // this exception.
                                //
                                ;
                            } 
                        }
                    } 
                    // 
                    // Kill switcher if needed, if we are not in a job we need
                    // to handle this as a special case. 
                    //
                    if( fKillSwitcher )
                    {
 
                        foreach( Process p in Process.GetProcessesByName( s_SwitcherExeName ) )
                        { 
                            if( m_userSessionId == p.SessionId ) 
                            {
                                if( !p.HasExited ) 
                                {
                                    //
                                    // Utility will handle exceptions correctly.
                                    // 
                                    Utility.KillHelper( p );
                                } 
 
                                IDT.TraceDebug( "ICARDACCESS:Killed msswchx.exe on IC desktop.}" );
                                break; 
                            }

                            ((IDisposable)p).Dispose();
                        } 
                    }
                    m_processList.Clear(); 
                } 
            }
            // 
            // tcserver.exe has a handle to our desktop, and will trap the user on the infocard desktop unless we explicitly kill it.
            //
            if ( IsXPTablet )
            { 
                KillTcserverInstancesForInfoCardDesktop();
            } 
        } 

        // 
        // Retrieves all instances of tcserver.exe that are associated with the infocard desktop and terminates them.
        //
        private void KillTcserverInstancesForInfoCardDesktop()
        { 
            //
            // Get all instances of tcserver and check to see if the sid matches. 
            // 
            foreach ( Process p in Process.GetProcessesByName( s_TcserverExeName ) )
            { 
                if ( NativeMcppMethods.IsCardSpaceTcserverInstance( p.Id, m_trustedUserSid ) )
                {
                    Utility.KillHelper( p );
                } 

                ((IDisposable)p).Dispose(); 
            } 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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