Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Subject: Re: cygipc (and PostgreSQL) XP problem resolved! From: Robert Collins To: cygwin@cygwin.com In-Reply-To: <20030511014650.GB18993@redhat.com> References: <3EBC8ED0.4040906@ece.gatech.edu> <20030510072239.GA19367@cygbert.vinschen.de> <1052554219.1824.14.camel@localhost> <20030510082949.GD19367@cygbert.vinschen.de> <3EBD3179.6070004@ece.gatech.edu> <20030510171629.GB11448@redhat.com> <3EBD3896.8000202@ece.gatech.edu> <1052612200.897.31.camel@localhost> <20030511012322.GA18836@redhat.com> <1052617309.897.43.camel@localhost> <20030511014650.GB18993@redhat.com> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-iCU+4P46aHcJX5Xc67/R" Organization: Message-Id: <1052618088.907.49.camel@localhost> Mime-Version: 1.0 Date: 11 May 2003 11:54:48 +1000 --=-iCU+4P46aHcJX5Xc67/R Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Sun, 2003-05-11 at 11:46, Christopher Faylor wrote: > On Sun, May 11, 2003 at 11:41:49AM +1000, Robert Collins wrote: > >On Sun, 2003-05-11 at 11:23, Christopher Faylor wrote: > >> Or we can just use Global atoms, as I suggested in cygwin-developers. > > > >IIRC Global atoms are not global these days - they are global within a > >single login at a time. I can't comment further without looking into the > >ftok spec again, which I don't have time for right now... >=20 > If that is really true, that would defeat the purpose of a global atom. Not at all. From memory: Global Atoms come from before multi-user kernels in the windows world. They are used for things like registering clipboard types - which are *not* meant to cross user boundaries. > I'm not sure what ftok has to do with whether global atoms are global > or not, however. ftok creates keys for use in IPC programs. They often need to cross user boundaries - similar in concept to the privilege separation logic in sshd these days. If we use a global atom that isn't truely global, this will break. Rob --=20 GPG key available at: . --=-iCU+4P46aHcJX5Xc67/R Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQA+va1oI5+kQ8LJcoIRAlq3AKCvZmJ8GUXyzKRgRDD6QN35PSo0sQCgu8pu KppO8aHyzSZGWDiamLCbYjw= =Hxp3 -----END PGP SIGNATURE----- --=-iCU+4P46aHcJX5Xc67/R--