On Thu, Dec 21, 2023 at 5:40 PM Steven Hartland <stevenmhartl...@gmail.com> wrote:
> poll and select for this behavior was broken in FreeBSD up until 195423 > <http://svn.freebsd.org/changeset/base/195423> was committed as detailed > by this bug report > <https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=94772>. > > Given the MacOS and FreeBSD have related history I wouldn't be surprised > if this is a bug in the OS implementation with poll on MacOS. > Thanks for the link to that bug report. It was opened when I was a senior support engineer at IBM doing, primarily, Linux and DYNIX/ptx kernel crash analysis and dealing with similar problems. The latter OS was because I had been doing the same job when IBM purchased Sequent Computer Systems. I don't recall any customer reporting this "bug" for either OS in 2006, but since DYNIX/ptx was derived from AT&T UNIX System V (aka SVR5) it is likely it exhibited the same behavior (i.e., "bug") as macOS does today. Whether that behavior is "broken" is debatable since the behavior is likely the documented, or at least expected behavior when the syscall was introduced. If you read that bug report you'll notice comments that the old behavior was consistent with the relevant standards. Which is not to say that behavior is optimal. Changes since 2006 by FreeBSD and Linux clearly represent improvements to the semantics of polling/selecting a FIFO file descriptor. But someone needs to open an issue with Apple and convince them to adopt the same improvement. This isn't something that the Go ecosystem can workaround. Too, for many use cases switching from a named fifo to something like a unix domain socket will provide the desired behavior on all the supported platforms. -- Kurtis Rader Caretaker of the exceptional canines Junior and Hank -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CABx2%3DD-s5XEieOFRNXREqQqDXZzqBNTwQH-8%3DTXWunfT89Epwg%40mail.gmail.com.
