From: Robert Klemme <bob.news@...>
Date: 2003-05-09T00:52:25+09:00
Subject: Re: IO.pipe + thread = hangs (was: Re: capture output)


<nobu.nokada@softhome.net> schrieb im Newsbeitrag
news:200305081214.h48CExeR010459@sharui.nakada.kanuma.tochigi.jp...
> Hi,
>
> At Thu, 8 May 2003 20:50:29 +0900,
> Robert Klemme wrote:
> > True for me, too.  Apparently I draw the wrong conclusion while
> > experimenting with pipe redirecting.  One of the scripts I was using
for
> > experiments (see attached) did seem to eat STDOUT output when STDERR
was
> > closed.  Strange, though.
>
> 1) you cannot reopen closed stream.
>
> $ ruby -e 'STDOUT.close;STDOUT.reopen(STDERR)'
> -e:1:in `reopen': closed stream (IOError)
>         from -e:1

I inserted the close before reopen only for experimental reasons. But
thanks anyway!

> 2) IO#reopen duplicates the file descriptor, so you have to
>    close also reopened stream to tell EOF to peer.
>
>  puts "Sending message to parent"
>  STDERR.write "Hi Dad"
> +STDERR.close
>  wr.close

Aha!  Thanks again!

Regards

    robert