[freetds] PHP 5.2.6 + pdo_dblib + FreeTDS 0.64 -- tds_open_socket: Unknown error: 0

Kian Mohageri kian.mohageri at gmail.com
Thu Jul 24 17:34:13 EDT 2008

On Thu, Jul 24, 2008 at 11:23 AM, James K. Lowden <jklowden at freetds.org> wrote:
> connect(2) may return only 0 or -1, and should set errno.  It appears to
> be returning nonzero, but not setting errno.  (sock_errno is just errno
> except on Win32.)  That is, it reports failure but not why.
> The only conclusion I can draw is that your FreeTDS configuration is
> correct, but something is amiss with your network setup that prevents your
> PHP application from forming the connection.  Moreover, IMO you have a
> FreeBSD bug, because a non-zero return code from connect(2) must be
> accompanied by a valid errno value.

I went ahead and looked into it some more and used your existing
debugging code.  connect(2) is returning -1 but not setting errno, as
you said.  I also checked that errno wasn't set to 0 explicitly (even
though if I'm understanding correctly, that'd still be broken
behavior).  I've submitted a PR with FreeBSD.  Still not sure why the
connect is failing in the first place, but hopefully it's not
something I've screwed up on my part.  I find it really strange that
it works in Apache but not CLI.

Time will tell.

Thanks for your help,


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