Bug #33684 for POE: POE::Wheel::ReadWrite I/O non-bloking error

Thu Feb 28 21:49:36 2008 ralph.lu [...] bluecoat.com - Ticket created

Subject:	POE::Wheel::ReadWrite I/O non-bloking error
Date:	Thu, 28 Feb 2008 17:00:13 -0800
To:	<bug-POE [...] rt.cpan.org>
From:	"Lu, Ralph" <ralph.lu [...] bluecoat.com>

Message body is not shown because sender requested not to inline it.

Download err
application/octet-stream 2.4k

Message body not shown because it is not plain text.

Hi, I am trying to create a script which handles non-blocking user input. It asked me to send the error message when I tried to run it. I attached the error log and the perl script for your reference. It took me a couple of hours trying to figure out what happened, but I still couldn't get anything. Thank your very much for your comments, Ralph

Sat Mar 22 18:11:23 2008 RCAPUTO [...] cpan.org - Correspondence added

Perl's select() only supports sockets. You cannot use it with STDIN/STDOUT. If you require user input on Windows, maybe you can use POE::Component::Server::TCP and Windows' TELNET.EXE. Alternatively, you can develop a graphical interface with POE & Tk.

Sat Mar 22 18:11:25 2008 The RT System itself - Status changed from 'new' to 'open'

Sat Mar 22 18:11:26 2008 RCAPUTO [...] cpan.org - Status changed from 'open' to 'rejected'

Mon Mar 24 10:14:46 2008 ralph.lu [...] bluecoat.com - Correspondence added

Subject:	RE: [rt.cpan.org #33684] POE::Wheel::ReadWrite I/O non-bloking error
Date:	Mon, 24 Mar 2008 07:15:27 -0700
To:	<bug-POE [...] rt.cpan.org>
From:	"Lu, Ralph" <ralph.lu [...] bluecoat.com>

Hi, Thank you. But this works under Cygwin. I believe it will work under UNIX/LINUX too. Looks to me this PoCO doesn't work under Windows platform. Thanks, Ralph Show quoted text

-----Original Message----- From: RCAPUTO via RT [mailto:bug-POE@rt.cpan.org] Sent: Saturday, March 22, 2008 6:11 PM To: Lu, Ralph Subject: [rt.cpan.org #33684] POE::Wheel::ReadWrite I/O non-bloking error <URL: http://rt.cpan.org/Ticket/Display.html?id=33684 > Perl's select() only supports sockets. You cannot use it with STDIN/STDOUT. If you require user input on Windows, maybe you can use POE::Component::Server::TCP and Windows' TELNET.EXE. Alternatively, you can develop a graphical interface with POE & Tk.

Mon Mar 24 10:14:53 2008 The RT System itself - Status changed from 'rejected' to 'open'

Sat Apr 19 02:01:49 2008 RCAPUTO [...] cpan.org - Correspondence added

The following is a known problem with ActiveState, and I believe the vanilla/strawberry/chocolate versions of Perl on Windows: $heap->{readwrite} = POE::Wheel::ReadWrite->new ( InputHandle => \*STDIN, OutputHandle => \*STDOUT, Driver => POE::Driver::SysRW->new(), Filter => POE::Filter::Line->new(), InputEvent => User_Input, ErrorEvent => Input_Fail, FlushedEvent => Input_Shutdown ); print "child_event end\n"; The Perl built-in select() call is based on the winsock select() which only works on sockets. Therefore select() in perl cannot be used on console handles (STDIN & STDOUT) in ActiveState, vanilla, strawberry or chocolate Perl on Windows. Cygwin implements its own select() which is not based on WinSock. As a result, select() works for console filehandles under Cygwin Perl.

Sat Apr 19 02:01:57 2008 RCAPUTO [...] cpan.org - Status changed from 'open' to 'rejected'