From owner-freebsd-hackers@freebsd.org Mon Sep 4 06:54:37 2017 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 16E9AE18234 for ; Mon, 4 Sep 2017 06:54:37 +0000 (UTC) (envelope-from auryn@zirakzigil.org) Received: from mx1.etoilesoft.fr (mx1.etoilesoft.fr [52.57.51.18]) by mx1.freebsd.org (Postfix) with ESMTP id 9F90168039 for ; Mon, 4 Sep 2017 06:54:36 +0000 (UTC) (envelope-from auryn@zirakzigil.org) Received: from mx1.etoilesoft.fr (localhost [127.0.0.1]) by mx1.etoilesoft.fr (Postfix) with ESMTP id 5602E9D1AB for ; Mon, 4 Sep 2017 06:47:00 +0000 (UTC) Received: from [192.168.43.173] (localhost [127.0.0.1]) (Authenticated sender: auryn@zirakzigil.org) by mx1.etoilesoft.fr (Postfix) with ESMTPA id 8C8F19D1A3 for ; Mon, 4 Sep 2017 06:46:59 +0000 (UTC) Subject: Re: devd in jail To: freebsd-hackers@freebsd.org References: From: Giulio Ferro Message-ID: <2a0d4a6f-003b-fcba-bd3a-31937bdb1b9f@zirakzigil.org> Date: Mon, 4 Sep 2017 08:46:09 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: fr X-Virus-Scanned: ClamAV using ClamSMTP X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Sep 2017 06:54:37 -0000 On 09/08/2017 21:14, Alan Somers wrote: > On Wed, Aug 9, 2017 at 12:47 PM, Giulio Ferro wrote: >> Hello all, >> >> Setup : 11.1-STABLE FreeBSD 11.1-STABLE #0 r321925M amd64 >> >> >> I'm trying to create a fully virtualized desktop enviroment in a jail by >> means of installing there >> a xrdp-devel server + Xorg installation (xorg + xorgrdp). >> >> Everything seems to work until the moment when the X server actually tries >> to come up (after I choose session=xorg, username + password) >> In the X logs in the jail, in fact, I have this error: >> >> ... >> [ 9768.824] (EE) config/devd: fail to connect to devd >> [ 9768.824] [config] failed to initialise devd >> >> >> I've checked on the host machine, and I don't have that error as everything >> works fine there... >> >> In my jail, I've setup the devfs like this (/etc/jail.conf in the host): >> >> --- >> exec.start="/bin/sh /etc/rc"; >> exec.stop="/bin/sh /etc/rc.shutdown"; >> exec.clean; >> mount.devfs; >> devfs_ruleset=1; >> >> path="/usr/home/jail/$name"; >> >> myjail { >> host.hostname="myjail.me.com"; >> vnet; >> vnet.interface = epair0b, epair1b; >> persist; >> } >> --- >> >> >> and in the /etc/devfs.conf everythink is commented out. >> >> In the /dev directory in the jail, I get both the devctl and devctl2 >> devices. >> >> As the devd demon is not running in the jail, I've tried adding >> devd_enable="YES" >> >> in the rc.conf (jail), but when I try to start it, I get: >> >> # /etc/rc.d/devd start >> Starting devd. >> devd: Can't open devctl device /dev/devctl: Device busy >> /etc/rc.d/devd: WARNING: failed to start devd >> >> >> Do you know if I'm doing something wrong, or there's a proper way to have >> devd running in the jail? >> >> I've thought that maybe I should use the devtcl2 device, as the devctl is >> used by the host, >> but I don't know how to specify that to devd... >> >> Thanks in advance for your help. >> >> Giulio > Unfortunately, you're not going to be able to run devd(8) in the jail. > /dev/devctl can be opened by only one reader at a time, and that > reader is always devd(8). /dev/devctl2 is actually a completely > different device with a totally different interface. Apologies for > the confusing names. But you may not need to run a totally separate > instance of devd. The X server is probably trying to open either > /var/run/devd.pipe or /var/run/devd.seqpacket.pipe. ktrace would tell > you which. If you can bridge those sockets into the jail, then X > would probably run. > > -Alan > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" Hi Alan, sorry for the late feedback and thanks for your advice. Unfortunately I haven't found a way to bridge (as you say) the relevant pipe files to the jail. I've tried to mount_nullfs the host /var/run to the jail /var/run, but with tragic results, as the jail deletes the /var/run content when it starts up. Do you have some better way to do that? I ask because this may be more convenient venue compared to apply the patches, and more portable in case of updates, etc... Thanks Giulio