From: Reimer Behrends <behrends@...>
Date: 2003-11-26T09:37:11+09:00
Subject: Re: redirect stdout

Mark J. Reed (markjreed@mail.com) wrote:
[...]
>  But it also loses the original STDOUT, and M Onoma did say that the
>  redirection was to be temporary.

Good catch. I missed that one.

>  You can accomplish that by saving
>  the original value and restoring it later, like this:
> 
>  	old_stdout = STDOUT.dup
>  	STDOUT.reopen( PLATFORM =~ /mswin/ ? "NUL" : "/dev/null" )
>  	. . .
>  	STDOUT.reopen(old_stdout)

You need

	old_stdout.close

here. Otherwise you have a file descriptor leak. Similarly:

>  Or, if you aren't invoking any processes external to ruby, you can leave
>  STDOUT alone and just change $stdout:
> 
>  	$stdout = File.open( PLATFORM =~ /mswin/ ? "NUL" : "/dev/null" )
>  	. . .
	$stdout.close
>  	$stdout = STDOUT

(And, of course, add the "w" flag to the open call, as you had already
mentioned.)

		Reimer Behrends