From mboxrd@z Thu Jan 1 00:00:00 1970 From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=) Subject: Re: GSoC ideas Date: Wed, 02 Mar 2016 22:31:41 +0100 Message-ID: <87a8mgefcy.fsf@gnu.org> References: <20160206113802.GA17867@thebird.nl> <87mvre2eyz.fsf@gnu.org> <56BC7496.8020409@gmail.com> <8760x5gpif.fsf@inria.fr> <20160302101227.GF2815@var.bordeaux.inria.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:46899) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1abEN4-0000vR-6U for guix-devel@gnu.org; Wed, 02 Mar 2016 16:31:50 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1abEN2-0006qs-VQ for guix-devel@gnu.org; Wed, 02 Mar 2016 16:31:50 -0500 In-Reply-To: <20160302101227.GF2815@var.bordeaux.inria.fr> (Samuel Thibault's message of "Wed, 2 Mar 2016 11:12:27 +0100") List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org Sender: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org To: Manolis Ragkousis Cc: guix-devel@gnu.org, bug-hurd@gnu.org Samuel Thibault skribis: > Ludovic Court=C3=A8s, on Wed 02 Mar 2016 11:09:28 +0100, wrote: >> Manolis Ragkousis skribis: >> > 1) Merge wip-hurd branch. >> > 2) Make the daemon handle chroot builds on the Hurd. >> > Note here that on the Hurd, one does not need to be root to achieve >> > isolation, so I should change the daemon to use this capability. >>=20 >> I think an ideal situation would be if libc provides =E2=80=98mount=E2= =80=99 and >> =E2=80=98umount=E2=80=99, with MS_BIND implemented in terms of firmlinks. >>=20 >> I remember Roland was not thrilled with the idea of adding =E2=80=98moun= t=E2=80=99 and >> =E2=80=98umount=E2=80=99, but it would clearly help porting. > > It can both help and hurt. Roland's concern is that we will probably not > want to provide a mount() that behaves like Linux, because in some cases > it may just not even make sense. So the "ported" software that would try > to use it would just fail. Do you have examples of GNU/Linux uses that would make no sense? Other options include calling out to the =E2=80=98settrans=E2=80=99 command= (inelegant IMO), writing Guile bindings for some of the Hurd libraries, and/or some sort of a MiG in Scheme (neat but takes some time!). Ludo=E2=80=99.