Solved

How to enumerate handles owned by process

Posted on 2002-04-09
6
962 Views
Last Modified: 2013-12-03
I want to find out the way how programs like "handle.exe" from http://www.sysinternals.com enumerate handles owned by some process.
Maybe somebody knows which API i should use for it.
0
Comment
Question by:Pavlik
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
6 Comments
 
LVL 32

Expert Comment

by:jhance
ID: 6930974
Their book, Inside Microsoft Windows 2000 discusses this:

http://www.sysinternals.com/insidew2k.shtml
0
 
LVL 86

Expert Comment

by:jkr
ID: 6931164
No, this book doesn't - believe me, there is no single line of code in it :o)

You basically have to

void    GetOpenHandleList   (   DWORD   dwPID,  obj_list*   pList)
{

    NTSTATUS                    ntStatus;

    HANDLE                      hObject;
    HANDLE                      hProcess;

    PSYSTEM_HANDLE_INFORMATION  pshi;

    ULONG                       ul  =   0x1000;
    PULONG                      pul =   new ULONG   [   ul];

    hProcess    =   OpenProcess (   PROCESS_DUP_HANDLE, FALSE,  dwPID);

    while   (   STATUS_INFO_LENGTH_MISMATCH ==  ZwQuerySystemInformation    (   SystemHandleInformation,
                                                                                pul,
                                                                                ul  *   sizeof  (   ULONG),
                                                                                0
                                                                            )
            )   delete  []  pul,    pul =   new ULONG   [   ul  *=  2];

    pshi    =   ( PSYSTEM_HANDLE_INFORMATION)   ( pul   +   1);

    for (   ULONG   i   =   0;  i   <   *pul;   i++)
        {
            if  (   pshi    [   i].ProcessId    !=  dwPID)  continue;

            hObject =   NULL;

            ZwDuplicateObject   (   hProcess,
                                    ( HANDLE)   pshi    [   i].Handle,
                                    NtCurrentProcess    (),
                                    &hObject,
                                    0,
                                    0,
                                    DUPLICATE_SAME_ATTRIBUTES
                                );

            if  (   hObject)
                    AppendObjectInformation (   hObject, pList);

        }

    delete  []  pul;
}

0
 
LVL 86

Accepted Solution

by:
jkr earned 200 total points
ID: 6931228
BTW - see also http://www.pearsonptg.com/samplechapter/1578701996.pdf for a documentation of 'ZwQuerySystemInformation()'
0
Revamp Your Training Process

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action.

 
LVL 1

Author Comment

by:Pavlik
ID: 6932259
I've tried to find some information about this but i still don't know where can i get functions like ZwQuerySystemInformation(). Is it in the Platform SDK?
0
 
LVL 86

Expert Comment

by:jkr
ID: 6932302
>>Is it in the Platform SDK?

No - you'll need the DDK from http://www.microsoft.com/hwdev/ddk/ 

Also note that 'ZwQuerySystemInformation()' is UNDOCUMENTED...
0
 
LVL 1

Author Comment

by:Pavlik
ID: 6932417
Thanks jkr.

I can not check all this stuff right now but looks like i have enough information to do it later.
0

Featured Post

PeopleSoft Has Never Been Easier

PeopleSoft Adoption Made Smooth & Simple!

On-The-Job Training Is made Intuitive & Easy With WalkMe's On-Screen Guidance Tool.  Claim Your Free WalkMe Account Now

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

If you have ever found yourself doing a repetitive action with the mouse and keyboard, and if you have even a little programming experience, there is a good chance that you can use a text editor to whip together a sort of macro to automate the proce…
As more and more people are shifting to the latest .Net frameworks, the windows presentation framework is gaining importance by the day. Many people are now turning to WPF controls to provide a rich user experience. I have been using WPF controls fo…
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…

628 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question