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Date: Fri, 25 Apr 2003 00:57:50 -0600 (MDT)
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To: wgrim@siue.edu
From: "M. Warner Losh" <imp@bsdimp.com>
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cc: freebsd-hackers@freebsd.org
Subject: Re: recv() returning 0 and EINTR on a still connection.
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In message: <Pine.SO4.4.05.10304250110450.18123-100000@cougar.isg.siue.edu>
            William Michael Grim <wgrim@siue.edu> writes:
: I think your problem is that n==0 does NOT mean the connection was closed
: (at least not with TCP; I haven't really looked into other session
: protocols).

I know that it does with FreeBSD, at least for read(2).

: If n==0, it only means you have stopped receiving data because there is no
: more to be received; you can only trust errno if n==-1 or whatever the man
: page specifies for your OS (FreeBSD is -1 in this case).

FreeBSD returns -1 and EWOULDBLOCK in this case.

Warner