Solved

Find mutex owner

Posted on 2008-10-07
9
1,608 Views
Last Modified: 2009-03-24
How can I find the owner of a mutex?  I have a list of mutex names and I want to find the PID/Handle of the mutex owner.  I get ACCESS DENIED when I try to open a mutex or create a new handle to a mutex.

I am running as administrator on XP SP3, with debug privs.
0
Comment
Question by:DSOM
[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
9 Comments
 
LVL 28

Expert Comment

by:2266180
ID: 22663447
I couldn't find any usable delphi code. however, here is a C++ one that is supposed to work: http://www.experts-exchange.com/Programming/Languages/CPP/Q_20073497.html
another idea, since a mutex handle is jsut another handle, would be to find the thereadid of the creator/owner of that handle. meaning enumerating handles and comparing them with what you have and then checking the owner.
I *think* you can use the enumMetaFile api function. wilson has some nice units that he says doe the job: http://www.wilsonc.demon.co.uk/d7ntutils.htm
0
 
LVL 45

Expert Comment

by:aikimark
ID: 22678315
I think this might be what you are looking for:
http://www.swissdelphicenter.ch/torry/showcode.php?id=2126

There seems to be something wrong with the page this morning, so you can see it in Google's cache:
http://74.125.45.104/search?q=cache:yJIG_4oX8yEJ:www.swissdelphicenter.ch/torry/showcode.php%3Fid%3D2126+Mutex+handle+delphi&hl=en&ct=clnk&cd=31&gl=us
0
 

Author Comment

by:DSOM
ID: 22689482
That doesn't help in this situation.  I have a list of active Mutex and I want to get a handle to each one, not a new handle, but the handle of the original creator of the Mutex so I can map it to a process.
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 28

Accepted Solution

by:
2266180 earned 500 total points
ID: 22799252
I tested the code from wilson, doesn't work right.
I did a little digging around and found a PAQ qith a solution from ThievingSix (http://www.experts-exchange.com/Programming/Languages/Pascal/Delphi/Q_23535337.html) leading to his blog post:
http://w-shadow.com/blog/2006/10/19/listing-all-open-handles/
tested, works. you will notice it prints out all handles with their name and, what you need, owning PID.

I vbelieve starting from there is pretty easy to adapt the code to your needs :)
0
 
LVL 45

Expert Comment

by:aikimark
ID: 23834840
@DSOM

Did you follow the 10/24/08 link posted by ciuly and evaluate the code?
0
 
LVL 45

Expert Comment

by:aikimark
ID: 23891579
I recommend ciuly comment http:#a22799252 be accepted with no points refunded if we don't hear from DSOM.
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
In my programming career I have only very rarely run into situations where operator overloading would be of any use in my work.  Normally those situations involved math with either overly large numbers (hundreds of thousands of digits or accuracy re…
This is a high-level webinar that covers the history of enterprise open source database use. It addresses both the advantages companies see in using open source database technologies, as well as the fears and reservations they might have. In this…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…

695 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