Date: Wed, 7 Apr 2010 14:43:11 +0800 From: Mars G Miro <spry@anarchy.in.the.ph> To: Dan Naumov <dan.naumov@gmail.com> Cc: freebsd-jail@freebsd.org, Glen Barber <glen.j.barber@gmail.com>, freebsd-questions@freebsd.org Subject: Re: bizarre mount_nullfs issue with jails / ezjail Message-ID: <v2rf12f408a1004062343ib9b5a133k9efc4ea9b1a4126c@mail.gmail.com> In-Reply-To: <t2tcf9b1ee01004062328hb3b221b5oaf90579419c3a8e9@mail.gmail.com> References: <k2xcf9b1ee01004061429ub4986488ya54af1a525aa209c@mail.gmail.com> <20100406213711.GA38637@orion.hsd1.pa.comcast.net> <p2wcf9b1ee01004061443j2009774ewe8221d4668cff9ba@mail.gmail.com> <z2of12f408a1004062049h92c68feaub51a48cb52289d31@mail.gmail.com> <t2tcf9b1ee01004062328hb3b221b5oaf90579419c3a8e9@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, Apr 7, 2010 at 2:28 PM, Dan Naumov <dan.naumov@gmail.com> wrote: >>> An additional question: how come "sade" and "sysinstall" which are run >>> inside the jail can see (and I can only assume they can also operate >>> on and damage) the real underlying disks of the host? >>> >> >> Disks (as well as others you have in your host's /dev) aren't visible >> inside jails. > > Well, somehow they are on my system. > > I guess I should've also clarified that the jail was installed using > ezjail and not completely manually > > From /usr/local/etc/ezjail/semipublic > > export jail_semipublic_devfs_enable="YES" > export jail_semipublic_devfs_ruleset="devfsrules_jail" > Well I'm not entirely familiar w/ ezjail but I use jails all the time, and I can tell you that /dev in jails is very limited, here's a /dev jail of mine: mars@spry9:~> ls -al /dev/ total 2 crw-rw-rw- 1 root wheel 0, 58 Mar 27 03:02 crypto dr-xr-xr-x 2 root wheel 512 Mar 27 03:12 fd dr-xr-xr-x 2 root wheel 512 Mar 30 20:00 iso9660 lrwxr-xr-x 1 root wheel 14 Mar 27 03:12 log -> ../var/run/log crw-rw-rw- 1 root wheel 0, 33 Apr 7 14:33 null crw-rw-rw- 1 root wheel 0, 7 Mar 27 03:02 ptmx dr-xr-xr-x 2 root wheel 512 Mar 27 03:22 pts crw-rw-rw- 1 root wheel 0, 10 Mar 27 11:12 random lrwxr-xr-x 1 root wheel 4 Mar 27 03:12 stderr -> fd/2 lrwxr-xr-x 1 root wheel 4 Mar 27 03:12 stdin -> fd/0 lrwxr-xr-x 1 root wheel 4 Mar 27 03:12 stdout -> fd/1 lrwxr-xr-x 1 root wheel 6 Mar 27 03:12 urandom -> random crw-rw-rw- 1 root wheel 0, 34 Mar 27 03:02 zero mars@spry9:~> So I guess it's a configuration issue w/ your jails. > - Sincerely, > Dan Naumov > -- cheers mars -----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?v2rf12f408a1004062343ib9b5a133k9efc4ea9b1a4126c>