So, the fact that system has returned does not mean all of it resources have been cleaned up.
Oh my! I didn't think about this issue! But this would mean that it is unsafe to have an (external) process create a file, and then use it in my program - at least under Windows, which is very picky about this kind of stuff? If I understand you right, this should even true if we use IPC::Run to run the process. OTOH, this scenario - running an utility to create a file, then use it - is so common, that I wonder why we are not bitten by this more often. Or is there a clever, safe way to achieve the goal?

-- 
Ronald Fischer <ynnor@mm.st>

In reply to Re^4: Win32: Setting a layer with binmode causes problem with close() on Windows (PerlIO silently fails to close the file) by rovf
in thread Win32: Setting a layer with binmode causes problem with close() on Windows by rovf

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