Patch request to qt 5.9.4 (Re: [ANNOUNCEMENT] Qt 5.9.4)
Corinna Vinschen
corinna-cygwin@cygwin.com
Mon Mar 11 09:45:00 GMT 2019
On Mar 11 00:21, Mark Geisert wrote:
> Tatsuro MATSUOKA wrote:
> > [...]
> > without the above patch ()
> > qt_safe_socket(PF_UNIX, SOCK_STREAM, 0, O_NONBLOCK)))
> > gnuplot cannot connect with gnuplot_qt.
> >
> > with the above patch ()
> > qt_safe_socket(PF_UNIX, SOCK_STREAM, 0))
> > gnuplot can connect with gnuplot_qt.
> >
> > Perhaps qt with O_NONBLOCK is some wrong with process connection.
>
> Hi Tatsuro,
> For the record, what Enrico supplied is what we'd call an STC, a Simple Test
> Case. Unfortunately his STC dealt with select() on a named pipe.
>
> Your gnuplot issue has to do with "Unix sockets", a form of IPC between
> processes. Cygwin uses Windows named pipes to implement "Unix sockets" on
> Windows.
No, wait! While there is code in Cygwin which is supposed to use
Windows named pipes to implement AF_UNIX sockets at one point, thos
code is far from being complete.
As yet, Cygwin uses loopback IPv4 sockets to implement AF_UNIX sockets.
Corinna
--
Corinna Vinschen
Cygwin Maintainer
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