>On 3/26/2020 7:19 PM, Ken Brown via Cygwin wrote:
>> On 3/26/2020 6:39 PM, Ken Brown via Cygwin wrote:
>>> On 3/26/2020 6:01 PM, sten.kristian.ivarsson@gmail.com wrote:
>>>> The ENIXIO occurs when parallel child-processes simultaneously using 
>>>> O_NONBLOCK opening the descriptor.
>>>
>>> This is consistent with my guess that the error is generated by 
>>> fhandler_fifo::wait.  I have a feeling that read_ready should have 
>>> been created as a manual-reset event, and that more care is needed to 
>>> make sure it's set when it should be.
>>>
>>>> I could provide a code-snippet
>>>> to reproduce it if wanted ?
>>>
>>> Yes, please!
>> 
>> That might not be necessary.  If you're able to build the git repo 
>> master branch, please try the attached patch.

>Here's a better patch.


I finally succeeded to build latest master (make is not my favourite tool)
and added the patch, but still no success in my little test-program (see
attachment) when creating a write-file-descriptor with O_NONBLOCK

 
>Ken