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Re: Bug in test-fcntl.c

From: Nicholas Gaya
Subject: Re: Bug in test-fcntl.c
Date: Mon, 10 May 2021 20:25:06 -0700

The process hierarchy starts with tclsh (MacPorts), then a bunch of layers of 
make and sh (from oath-toolkit's recursive `make check`), and finally the 
test-fcntl executable. I was using MacPorts' "trace mode", which seems to be 
responsible for the particularly high number of inherited open files, but 
without trace mode I still run into the issue; the returned fd is 11 in this 

But I don't really want to focus on my specific use-case (for which I already 
have a workaround).  I think the patch is warranted just on the basis that it 
makes the test a bit more robust, with minimal drawbacks.

> On May 9, 2021, at 5:24 AM, Bruno Haible <bruno@clisp.org> wrote:
> Nicholas Gaya wrote:
>> it seems like the test process inherits a lot of open files from its parent,
>> as the actual fd returned by fcntl is 67.
> That seems excessive. What is the chain of parent, grandparent etc. processes?
> Bruno

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