Re: Apache2 chroot /dev/null permission denied

On Wed, Mar 17, 2010 at 11:22 PM, Wayne <linuxtwo@gmail.com> wrote:

Knowledge Seeker wrote:

Hi,
I have an old Debian Etch box, running Apache2 on chroot jail. Yesterday,
(it sounds like joke) I turned off the machine and when I started it again
the web server did not come to life again.
The problem was a Permission Denied on the /dev/null.

I created my device with the command: mknod -m 0666 /chroot/dev/null c 1 3
listing the permissions:

crw-rw-rw- 1 root root 1, 3 2010-03-16 18:37 null
crw-rw-rw- 1 root root 1, 8 2010-03-16 18:39 random
crw-rw-rw- 1 root root 1, 9 2010-03-16 18:39 urandom

(When I change the group to sys, don't solve the problem)

Even outside of the chroot when I try to echo something and redirect to this
device I get the same message:

-su: null: Permission Denied

My kernel is the default:
2.6.18-6-686 #1 SMP

Everything worked fine 2 days ago.

I really wish to understand and solve this issue.
When I mount all /dev with a bind option, it works fine again, but I

I ran into that after an upgrade on squeeze a few months ago. As a result a few programs would not run. The atd daemon was the only one I cared about. Don't know, yet, what caused it but the fix was to put the following into /root/.bash_profile.

chmod 666 /dev/null
chgrp root /dev/null

/etc/init.d/atd restart

HTH

Wayne

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