Tue Sep 20 13:18:01 GMT 2022
On 9/20/2022 2:54 AM, Enrico Forestieri wrote:
> On Mon, Sep 19, 2022 at 07:54:11PM -0400, Ken Brown wrote:
>> Then I guess I'm wrong. I'm really puzzled, because it seems that none of these
>> platforms agree with POSIX, which says the following in its 'read' documentation:
>> When attempting to read from an empty pipe or FIFO:
>> If no process has the pipe open for writing, read() shall return 0 to
>> indicate end-of-file.
>> It seems that there's an exception: If no process has ever had the FIFO open for
>> writing since it was opened for reading, then the FIFO is not considered to be
>> at end-of-file.
>> I'll look into fixing this. But I'd be more confident about it if I could find
>> some documentation of the existing behavior.
> I compared the behavior of read() and select() on 3 different platforms.
> My conclusion is that, actually, read() behaves the same on all of them,
> whereas cygwin differs in the way select() works.
Then I'm even more confused than I was before. Are you saying that there are
situations in which read() reports EOF but select() does not report read ready?
Could you post the code you used for testing?
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