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Date: Tue, 7 Nov 2006 10:24:04 -0700
From: John E Hein <jhein@timing.com>
To: Jung-uk Kim <jkim@FreeBSD.org>
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Cc: freebsd-emulation@FreeBSD.org
Subject: Re: [PATCH]: possible fix for the fifoor problem
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Jung-uk Kim wrote at 12:01 -0500 on Nov  7, 2006:
 > Try the attached patch instead.
 > 
 > Jung-uk Kim
 > --- src/sys/compat/linux/linux_stats.c.orig	Sun Oct 22 07:52:11 2006
 > +++ src/sys/compat/linux/linux_stats.c	Tue Nov  7 11:59:21 2006
 > @@ -130,7 +130,7 @@
 >  	int temp;
 >  
 >  	temp = td->td_retval[0];
 > -	if (kern_open(td, path, UIO_SYSSPACE, O_RDONLY, 0) != 0)
 > +	if (kern_open(td, path, UIO_SYSSPACE, O_RDONLY | O_NONBLOCK, 0) != 0)
 >  		return;
 >  	fd = td->td_retval[0];
 >  	td->td_retval[0] = temp;

Yep.
That fixes the problem with linux-seamonkey I reported.