How to detect if the current process (or dll) run as service ???

[Thierry]

Hi.

I am working on a managed dll.
What code can I use in C# to detect if my dll is running under a
service (like IIS) or called from a 'normal' program.

Thanks

Thierry

[Derek Stone]

Check the value of the System.Environment.UserName property. If it is a
non-user account, such as "SYSTEM" or "Network", then it is safe to assume
that the process is running as a service.

Good luck,
Derek Stone
EliteVB.com

"Thierry" <no**@none.com> wrote in message
news:e5**************@TK2MSFTNGP09.phx.gbl...

Hi.

I am working on a managed dll.
What code can I use in C# to detect if my dll is running under a
service (like IIS) or called from a 'normal' program.

Thanks

Thierry

[Peter Rilling]

That is not necessarily correct because the user could change the identity
that the service is running under.

The problem is that a service is nothing more than an executable. Here are
a couple things that you might try. I have not actually done these but they
make logical sense if you can get them to work.

1) All services inherit from ServiceBase. You might check the call stack
to see if the very first method called belonged to a class that inherited
from ServiceBase.
2) Or you could use the ServiceController to get the names of all services
registered in the system and compare them with your application. If there
is a match, you may be running in a service. This is not perfect I guess
since it might be possible to have a service and a regular application with
the same name.

"Derek Stone" <ds****@elitevb.com> wrote in message
news:#$**************@TK2MSFTNGP11.phx.gbl...

Check the value of the System.Environment.UserName property. If it is a
non-user account, such as "SYSTEM" or "Network", then it is safe to assume
that the process is running as a service.

Good luck,
Derek Stone
EliteVB.com

"Thierry" <no**@none.com> wrote in message
news:e5**************@TK2MSFTNGP09.phx.gbl...

Hi.

I am working on a managed dll.
What code can I use in C# to detect if my dll is running under a
service (like IIS) or called from a 'normal' program.

Thanks

Thierry

[antichrist]

[DllImport("advapi32.dll", CharSet=System.Runtime.InteropServices.CharSet.Unicode, SetLastError=true)]
private extern static IntPtr OpenSCManager(string machineName, string databaseName, int access);        
 
[DllImport("advapi32.dll",SetLastError=true, CharSet=CharSet.Auto)]
private static extern bool EnumServicesStatusEx(IntPtr hSCManager,
    int InfoLevel, int dwServiceType,
    int dwServiceState, IntPtr lpServices, UInt32 cbBufSize,
    out uint pcbBytesNeeded, out uint lpServicesReturned,
    ref uint lpResumeHandle, string pszGroupName);
 
[DllImport("advapi32.dll")]
private static extern bool CloseServiceHandle(IntPtr hSCObject);
 
[DllImport("kernel32.dll", CharSet=CharSet.Auto)]
private static extern int GetCurrentProcessId();                    
 
[StructLayout(LayoutKind.Sequential, Pack=1)]
public struct ENUM_SERVICE_STATUS_PROCESS
{
    public static readonly int SizeOf = Marshal.SizeOf(typeof(ENUM_SERVICE_STATUS_PROCESS));
 
    [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]
    public string pServiceName;
 
    [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]
    public string pDisplayName;
 
    public SERVICE_STATUS_PROCESS ServiceStatus;
}
 
[StructLayout(LayoutKind.Sequential, Pack=1)]
public struct SERVICE_STATUS_PROCESS
{
    public static readonly int SizeOf = Marshal.SizeOf(typeof(SERVICE_STATUS_PROCESS));
 
    public int dwServiceType;  
    public int dwCurrentState;  
    public int dwControlsAccepted;  
    public int dwWin32ExitCode;  
    public int dwServiceSpecificExitCode;  
    public int dwCheckPoint;  
    public int dwWaitHint;  
    public int dwProcessId;  
    public int dwServiceFlags;
} 
 
// http://www.hoytsoft.org/sourceFile.aspx?zip=files/HoytSoft.ServiceProcess_src(Rev3).zip&source=Service%20Base/ServicesAPI.cs
private const int SERVICE_NO_CHANGE = -1;
private const int STANDARD_RIGHTS_REQUIRED = 0xF0000;
private const int SC_ENUM_PROCESS_INFO = 0;
 
private enum ServiceType { SERVICE_KERNEL_DRIVER = 0x1, SERVICE_FILE_SYSTEM_DRIVER = 0x2, SERVICE_WIN32_OWN_PROCESS = 0x10, SERVICE_WIN32_SHARE_PROCESS = 0x20, SERVICE_INTERACTIVE_PROCESS = 0x100, SERVICETYPE_NO_CHANGE = SERVICE_NO_CHANGE, SERVICE_WIN32 = (SERVICE_WIN32_OWN_PROCESS | SERVICE_WIN32_SHARE_PROCESS) }
private enum ServiceStartType { SERVICE_BOOT_START = 0x0, SERVICE_SYSTEM_START = 0x1, SERVICE_AUTO_START = 0x2, SERVICE_DEMAND_START = 0x3, SERVICE_DISABLED = 0x4, SERVICESTARTTYPE_NO_CHANGE = SERVICE_NO_CHANGE }
private enum ServiceErrorControl { SERVICE_ERROR_IGNORE = 0x0, SERVICE_ERROR_NORMAL = 0x1, SERVICE_ERROR_SEVERE = 0x2, SERVICE_ERROR_CRITICAL = 0x3, msidbServiceInstallErrorControlVital = 0x8000, SERVICEERRORCONTROL_NO_CHANGE = SERVICE_NO_CHANGE }
private enum ServiceStateRequest { SERVICE_ACTIVE = 0x1, SERVICE_INACTIVE = 0x2, SERVICE_STATE_ALL = (SERVICE_ACTIVE | SERVICE_INACTIVE) }
private enum ServiceControlType { SERVICE_CONTROL_STOP = 0x1, SERVICE_CONTROL_PAUSE = 0x2, SERVICE_CONTROL_CONTINUE = 0x3, SERVICE_CONTROL_INTERROGATE = 0x4, SERVICE_CONTROL_SHUTDOWN = 0x5, SERVICE_CONTROL_PARAMCHANGE = 0x6, SERVICE_CONTROL_NETBINDADD = 0x7, SERVICE_CONTROL_NETBINDREMOVE = 0x8, SERVICE_CONTROL_NETBINDENABLE = 0x9, SERVICE_CONTROL_NETBINDDISABLE = 0xA, SERVICE_CONTROL_DEVICEEVENT = 0xB, SERVICE_CONTROL_HARDWAREPROFILECHANGE = 0xC, SERVICE_CONTROL_POWEREVENT = 0xD, SERVICE_CONTROL_SESSIONCHANGE = 0xE,  }
private enum ServiceState { SERVICE_STOPPED = 0x1, SERVICE_START_PENDING = 0x2, SERVICE_STOP_PENDING = 0x3, SERVICE_RUNNING = 0x4, SERVICE_CONTINUE_PENDING = 0x5, SERVICE_PAUSE_PENDING = 0x6, SERVICE_PAUSED = 0x7  }
private enum ServiceControlAccepted { SERVICE_ACCEPT_STOP = 0x1, SERVICE_ACCEPT_PAUSE_CONTINUE = 0x2, SERVICE_ACCEPT_SHUTDOWN = 0x4, SERVICE_ACCEPT_PARAMCHANGE = 0x8, SERVICE_ACCEPT_NETBINDCHANGE = 0x10, SERVICE_ACCEPT_HARDWAREPROFILECHANGE = 0x20, SERVICE_ACCEPT_POWEREVENT = 0x40, SERVICE_ACCEPT_SESSIONCHANGE = 0x80 }
private enum ServiceControlManagerType { SC_MANAGER_CONNECT = 0x1, SC_MANAGER_CREATE_SERVICE = 0x2, SC_MANAGER_ENUMERATE_SERVICE = 0x4, SC_MANAGER_LOCK = 0x8, SC_MANAGER_QUERY_LOCK_STATUS = 0x10, SC_MANAGER_MODIFY_BOOT_CONFIG = 0x20, SC_MANAGER_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED | SC_MANAGER_CONNECT | SC_MANAGER_CREATE_SERVICE | SC_MANAGER_ENUMERATE_SERVICE | SC_MANAGER_LOCK | SC_MANAGER_QUERY_LOCK_STATUS | SC_MANAGER_MODIFY_BOOT_CONFIG }
private enum ACCESS_TYPE { SERVICE_QUERY_CONFIG = 0x1, SERVICE_CHANGE_CONFIG = 0x2, SERVICE_QUERY_STATUS = 0x4, SERVICE_ENUMERATE_DEPENDENTS = 0x8, SERVICE_START = 0x10, SERVICE_STOP = 0x20, SERVICE_PAUSE_CONTINUE = 0x40, SERVICE_INTERROGATE = 0x80, SERVICE_USER_DEFINED_CONTROL = 0x100, SERVICE_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED | SERVICE_QUERY_CONFIG | SERVICE_CHANGE_CONFIG | SERVICE_QUERY_STATUS | SERVICE_ENUMERATE_DEPENDENTS | SERVICE_START | SERVICE_STOP | SERVICE_PAUSE_CONTINUE | SERVICE_INTERROGATE | SERVICE_USER_DEFINED_CONTROL }
 
public static bool IsCurrentProcessAService()
{
    return IsProcessAService(GetCurrentProcessId());
}
 
//public static bool IsProcessAService(int processId)
public static bool IsProcessAService(int processId)
{
    IntPtr handle = IntPtr.Zero;
    IntPtr buf = IntPtr.Zero;
    try
    {
        handle = OpenSCManager(null, null, (int)ServiceControlManagerType.SC_MANAGER_ALL_ACCESS);
        if(handle != IntPtr.Zero)
        {
            uint iBytesNeeded = 0;
            uint iServicesReturned = 0;
            uint iResumeHandle = 0;
 
            ENUM_SERVICE_STATUS_PROCESS infoLevel = new ENUM_SERVICE_STATUS_PROCESS();
            if(!EnumServicesStatusEx(handle, SC_ENUM_PROCESS_INFO, (int)ServiceType.SERVICE_WIN32, (int)ServiceStateRequest.SERVICE_STATE_ALL, IntPtr.Zero, 0, out iBytesNeeded, out iServicesReturned, ref iResumeHandle, null))
            {
                buf = Marshal.AllocHGlobal((int)iBytesNeeded);
                if(!EnumServicesStatusEx(handle, SC_ENUM_PROCESS_INFO, (int)ServiceType.SERVICE_WIN32, (int)ServiceStateRequest.SERVICE_STATE_ALL, buf, iBytesNeeded, out iBytesNeeded, out iServicesReturned, ref iResumeHandle, null))
                    throw new Win32Exception(Marshal.GetLastWin32Error());
 
                ENUM_SERVICE_STATUS_PROCESS serviceStatus;
                int iPtr = buf.ToInt32();
                for(int i = 0; i < (int)iServicesReturned; i++)
                {
                    serviceStatus = (ENUM_SERVICE_STATUS_PROCESS)Marshal.PtrToStructure(new IntPtr(iPtr), typeof(ENUM_SERVICE_STATUS_PROCESS));
 
                    //System.Console.WriteLine("{0} - {1}", serviceStatus.pServiceName, serviceStatus.ServiceStatus.dwProcessId);
 
                    if(serviceStatus.ServiceStatus.dwProcessId == processId)
                        return true;
 
                    iPtr += ENUM_SERVICE_STATUS_PROCESS.SizeOf;
                }                        
            }
        }
 
        return false;
    }
    finally
    {
        if(handle != IntPtr.Zero)
            CloseServiceHandle(handle);
 
        if(buf != IntPtr.Zero)
            Marshal.FreeHGlobal(buf);
    }
}