From: Andreas Schwab <schwab@linux-m68k.org>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Sergey Senozhatsky <sergey.senozhatsky@mail.by>,
       Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org
Subject: Re: possible regression with pty.c commit
References: <20090711191556.GA3845@localdomain.by>
	<20090711232452.4dc7c1ba@lxorguk.ukuu.org.uk>
	<20090711235530.GA3231@localdomain.by>
	<20090713124834.5c3ecc5d@lxorguk.ukuu.org.uk>
Date: Mon, 20 Jul 2009 01:07:09 +0200
In-Reply-To: <20090713124834.5c3ecc5d@lxorguk.ukuu.org.uk> (Alan Cox's message
	of "Mon, 13 Jul 2009 12:48:34 +0100")
Message-ID: <m2prbw6zmq.fsf@igel.home>
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Here is a testcase with expect:

#!/usr/bin/expect -f
spawn echo foo bar
expect {
    "foo bar" {puts $expect_out(buffer)}
}

With d945cb9cce20ac7143c2de8d88b187f62db99bdc reverted, I get the
expected output:

$ expect -f pty.exp
spawn echo foo bar
foo bar
foo bar

Without the revert the expect process receives EIO when it tries to read
the output of the echo process which already died.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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