From owner-freebsd-emulation@FreeBSD.ORG Tue Sep 14 18:51:44 2004 Return-Path: Delivered-To: freebsd-emulation@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5707816A4CE for ; Tue, 14 Sep 2004 18:51:44 +0000 (GMT) Received: from odin.ac.hmc.edu (Odin.AC.HMC.Edu [134.173.32.75]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3196043D45 for ; Tue, 14 Sep 2004 18:51:44 +0000 (GMT) (envelope-from brdavis@odin.ac.hmc.edu) Received: from odin.ac.hmc.edu (localhost.localdomain [127.0.0.1]) by odin.ac.hmc.edu (8.13.0/8.13.0) with ESMTP id i8EIqaC3004661; Tue, 14 Sep 2004 11:52:36 -0700 Received: (from brdavis@localhost) by odin.ac.hmc.edu (8.13.0/8.13.0/Submit) id i8EIqaXZ004660; Tue, 14 Sep 2004 11:52:36 -0700 Date: Tue, 14 Sep 2004 11:52:36 -0700 From: Brooks Davis To: "Conrad J. Sabatier" Message-ID: <20040914185236.GA31186@odin.ac.hmc.edu> References: <20040914133535.3aa9ee21@dolphin.local.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="qMm9M+Fa2AknHoGS" Content-Disposition: inline In-Reply-To: <20040914133535.3aa9ee21@dolphin.local.net> User-Agent: Mutt/1.4.1i X-Virus-Scanned: by amavisd-new X-Spam-Status: No, hits=0.0 required=8.0 tests=none autolearn=no version=2.63 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on odin.ac.hmc.edu cc: freebsd-emulation@freebsd.org Subject: Re: /dev, /proc support in a chrooted Linux emulation environment X-BeenThere: freebsd-emulation@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Development of Emulators of other operating systems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Sep 2004 18:51:44 -0000 --qMm9M+Fa2AknHoGS Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Sep 14, 2004 at 01:35:35PM -0500, Conrad J. Sabatier wrote: > I've been exploring running Linux binaries under a chrooted Linux shell > (entering the environment via "chroot /compat/linux /bin/bash"). I've > had remarkable success in installing and running quite a few rpms beyond > those found in the linux_base port, but have found that /dev support (as > well as /proc) doesn't work as expected when running Linux apps within > such an environment. >=20 > Programs/scripts attempting to access, for example, /dev/null complain > about no such file or device. The same for /dev/ttyX, /dev/zero, etc. >=20 > Similar problems occur attempting to use /proc/*. I'm also experiencing > some networking problems, mainly with DNS resolution, but for now, my > main concern is /dev and /proc. > > I realize that the method I'm using for running Linux apps is not what > was intended with FreeBSD's Linux emulation mode, but it's interesting > enough that I want to continue delving into it. My goal is to have as > near-complete a working Linux environment as possible, one that would > support running practically any Linux app within this chrooted > environment and would, for all intents and purposes, appear as a "real" > Linux to any programs running within it. >=20 > Are there any suggestions as to how I might remedy some of these > problems? Or is this simply beyond the scope/capabilities of the Linux > emulator at this time? You can provide a fairly complete linux /proc with linprocfs. /dev is more difficult. You can try mounting devfs in your linux /dev which may work for many applications. For the moment, you can also make nodes like /dev/null and /dev/zero with mknod, but I believe that functionality will be going away. I suspect we will eventually need a lindevfs to make devices show up the way linux wants them to. -- Brooks --=20 Any statement of the form "X is the one, true Y" is FALSE. PGP fingerprint 655D 519C 26A7 82E7 2529 9BF0 5D8E 8BE9 F238 1AD4 --qMm9M+Fa2AknHoGS Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQFBRz3zXY6L6fI4GtQRApofAKC3i/RY5cMEss8OO2/xE+0rt6x7YgCcCBPw L0q/jHuwM8FtZin4wj0ZPpw= =FEU1 -----END PGP SIGNATURE----- --qMm9M+Fa2AknHoGS--