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Date: Fri, 3 Nov 2000 16:08:00 -0500
From: Jason Tishler <Jason DOT Tishler AT dothill DOT com>
To: cygwin AT sources DOT redhat DOT com
Cc: pgsql-ports AT postgresql DOT org
Subject: Re: [PORTS] Re: ps and psql from PostgreSQL not working with cygwin-1.1.5-2
Message-ID: <20001103160800.A523@dothill.com>
References: <20001029205046 DOT A19137 AT redhat DOT com> <kvd7gh6ngu DOT fsf AT vzell DOT de DOT oracle DOT com> <20001031114831 DOT A27220 AT redhat DOT com> <20001102122634 DOT A211 AT dothill DOT com>
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In-Reply-To: <20001102122634.A211@dothill.com>; from Jason.Tishler@dothill.com on Thu, Nov 02, 2000 at 12:26:34PM -0500
Organization: Dot Hill Systems Corp.

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On Thu, Nov 02, 2000 at 12:26:34PM -0500, Jason Tishler wrote:
> On Tue, Oct 31, 2000 at 11:48:31AM -0500, Christopher Faylor wrote:
> > I can't duplicate the ps problem and I don't use psql.exe so, unless someone
> > can debug this, or provide more details, this will be a problem that is in
> > 1.1.5.
> 
> Either of the two attached patches will solve the 1.1.5 psql.exe problem.
> I think that the first one is more correct and the second one safer (i.e.,
> less likely to break other code).

After more research, I realize that both of the above patches are wrong.
Sorry for the gyrations but I went into frenzy mode due to the impending
1.1.5 release (which if I remember correctly was suppose to be
yesterday)...  I was also thrown off by Cygwin's strerror(EAGAIN)
returning "No more processes" instead of "Resource temporarily
unavailable" as on other UNIXes (at least Solaris and RedHat 6.2 Linux).

Anyway, I now think that PostgreSQL's psql should be changed to deal
with the possibility of errno equal to EAGAIN when connect() returns -1.
See attached patch for details.

Does anyone else concur?

Thanks,
Jason

P.S. From reading the MSDN, it appears that Win32 psql should be checking
for WSAEWOULDBLOCK too...

-- 
Jason Tishler
Director, Software Engineering       Phone: +1 (732) 264-8770 x235
Dot Hill Systems Corporation         Fax:   +1 (732) 264-8798
82 Bethany Road, Suite 7             Email: Jason DOT Tishler AT dothill DOT com
Hazlet, NJ 07730 USA                 WWW:   http://www.dothill.com

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--- postgresql-7.0.2.orig/src/interfaces/libpq/fe-connect.c	Sun May 21 17:19:53 2000
+++ postgresql-7.0.2/src/interfaces/libpq/fe-connect.c	Fri Nov  3 15:26:08 2000
@@ -868,7 +868,7 @@ connectDBStart(PGconn *conn)
 	if (connect(conn->sock, &conn->raddr.sa, conn->raddr_len) < 0)
 	{
 #ifndef WIN32
-		if (errno == EINPROGRESS || errno == 0)
+		if (errno == EINPROGRESS || errno == EAGAIN || errno == 0)
 #else
 		if (WSAGetLastError() == WSAEINPROGRESS)
 #endif


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