From: nobu.nokada@...
Date: 2003-12-22T16:16:32+09:00
Subject: Re: BUG in fcntl?

Hi,

At Mon, 22 Dec 2003 15:01:56 +0900,
Mark J. Reed wrote:
> In ruby 1.8.1 (2003-12-05) [i686-linux], why does this program:
> 
> 	require 'fcntl'
> 	
> 	flags = $stdin.fcntl(Fcntl::F_GETFL)
> 	flags |= Fcntl::O_NONBLOCK
> 	
> 	$stdin.fcntl(Fcntl::F_SETFL, flags)
> 	
> 	c = $stdin.getc
> 	puts "c=#{c}"
> 
> Hang on the getc call?

Because IO#getc retries at EAGAIN.  $stdin.read(1) doesn't stop
there but raises Errno::EAGAIN.  Or you'd be possible to use
IO#ready? and #wait in io/wait library.

-- 
Nobu Nakada