Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Subject: Re: cygipc (and PostgreSQL) XP problem resolved! From: Robert Collins To: cygwin AT cygwin DOT com In-Reply-To: <20030511014650.GB18993@redhat.com> References: <3EBC8ED0 DOT 4040906 AT ece DOT gatech DOT edu> <20030510072239 DOT GA19367 AT cygbert DOT vinschen DOT de> <1052554219 DOT 1824 DOT 14 DOT camel AT localhost> <20030510082949 DOT GD19367 AT cygbert DOT vinschen DOT de> <3EBD3179 DOT 6070004 AT ece DOT gatech DOT edu> <20030510171629 DOT GB11448 AT redhat DOT com> <3EBD3896 DOT 8000202 AT ece DOT gatech DOT edu> <1052612200 DOT 897 DOT 31 DOT camel AT localhost> <20030511012322 DOT GA18836 AT redhat DOT com> <1052617309 DOT 897 DOT 43 DOT camel AT localhost> <20030511014650 DOT GB18993 AT redhat DOT 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--