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Date:      Fri, 20 Dec 2002 18:37:07 -0800
From:      Alfred Perlstein <bright@mu.org>
To:        arch@freebsd.org
Cc:        bde@freebsd.org
Subject:   pipes and FIONBIO breakage?
Message-ID:  <20021221023707.GK23663@elvis.mu.org>

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I noticed that the ioctl handler for pipes doesn't do anything for
FIONBIO requests, this is in contrast to the socket handling of
FIONBIO requests which sets the SS_NBIO flag in the socket structure.

I think this may cause a descrepency between how pipes and sockets
behave where there shouldn't be one.  This can happen if one dup(2)s
a pipe and then calls FIONBIO on it, the file status may change only
one of the descriptors not the actual underlying pipe's behavior.

Should we actually OR in a flag into the pipe's data structure and
use that instead of the struct file's flag?  This seems to be what
the socket code does.

thanks,
-- 
-Alfred Perlstein [alfred@freebsd.org]
'Instead of asking why a piece of software is using "1970s technology,"
 start asking why software is ignoring 30 years of accumulated wisdom.'

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