Re: Bug in test-fcntl.c

[Nicholas Gaya]

I ran into this issue when running tests for the MacPorts port of oath-toolkit 
(https://ports.macports.org/port/oath-toolkit/) on Mac OS 10.14.6. I don't know 
the specific reason, but it seems like the test process inherits a lot of open 
files from its parent, as the actual fd returned by fcntl is 67.

Closing fd 10 is a good suggestion, as it's simpler than having to convert the 
fd to/from a string to pass it to the child process. I updated the patch file 
with this approach.

> On May 8, 2021, at 7:03 PM, Bruno Haible <bruno@clisp.org> wrote:
> 
> Hi,
> 
> Nicholas Gaya wrote:
>> fd 10 is already in use (which happens to be the case in the testing
>> environment where I ran into this bug)
> 
> 3 questions:
> 1) What is this environment that leaves fd 10 open when it starts a process?
> 2) For which purpose does it use this fd?
> 3) What would happen if we close fd 10 in test-fcntl.c?
> 
> Bruno
>