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To: cygwin@cygwin.com
From: Andrew Schulman <schulman.andrew@epa.gov>
Subject: Re: Logging-in using ssh elevates the user privilege.
Date: Fri, 08 Mar 2019 12:57:20 -0500
Message-ID: <17b58eds2gm17qs2sjmmbhhrnqka5htm9s@4ax.com>
References: <20190307010000.fc28b73739c2dd66e609982b@nifty.ne.jp> <381052629.20190307141955@yandex.ru> <51233666.20190307182445@yandex.ru> <20190308230138.b7f6b5ac90c9a14cde2647c1@nifty.ne.jp> <20190308141118.GM3785@calimero.vinschen.de> <20190308234638.0ada919bc31803cf064ca720@nifty.ne.jp> <20190308145247.GO3785@calimero.vinschen.de>
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> Hi Andrew,
> 
> On Mar  8 23:46, Takashi Yano wrote:
> > Hi Corinna,
> > 
> > Thanks for your advice.
> > 
> > On Fri, 8 Mar 2019 15:11:18 +0100 Corinna Vinschen wrote:
> > > > In Linux, connect() in the client returns befor the
> > > > server calls accept(). However, in cygwin, connect()
> > > > does not return until the server calls accept().
> > > 
> > > This is a result of the handshake to exchange credentials for
> > > getpeereid().  To workaround this issue, try building screen
> > > with a tweak.  Server and as client should call
> > > 
> > >   setsockopt (sock, SOL_SOCKET, SO_PEERCRED, NULL, 0);
> > > 
> > > before calling accept or connect.
> > 
> > Following your advice, I tried the patch attached and
> > confirmed the problem regarding -Q option is solved.
> 
> any chance to rebuild screen with the patch from
> https://cygwin.com/ml/cygwin/2019-03/msg00167.html

Sure, will do. Thanks to both of y'all for solving this.
Andrew


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