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locked file

Posted on 2008-10-15
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Last Modified: 2013-12-04
Hi,

Is there a way to detect a locked file without trying open that file first?
Thanks,
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Question by:mycuti08
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5 Comments
 
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Expert Comment

by:mannujam
ID: 22730203
Se if this article can help you. You can have a log if it is locked
http://windowsxp.mvps.org/processlock.htm
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by:mycuti08
ID: 22730314
Thanks for the answer, but I'm looking for a programmatical solution.
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mannujam earned 500 total points
ID: 22730661
Yah if executable is free you can use it programatically in your code .
One other way is to get into all executables  memory and
determine how many handles a process has open, but you have to go down to kernel level to map the handles to processes. This way you can do it easily.
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Author Comment

by:mycuti08
ID: 22730719
I prefer the latter. Once you get to the handles that a process opened, can you tell if there is flag or something like that associated with a handle to indicate the file is locked or not?
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Expert Comment

by:DanRollins
ID: 22736552
The source code provided in this article:

   Examine Information on Windows NT System Level Primitives
   http://www.codeguru.com/Cpp/W-P/system/processesmodules/article.php/c2827
should get you started.
The normal way to test is a file is locked is to simply try to open it for write access and the note if thatopen fails.  I know that you want to find an alternate methid but that is fastest and easiest.
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