mock, /dev/null and "Permission denied"

[Mike Pomraning]

Just a quick note that the symptoms described in this thread
<https://lists.fedoraproject.org/pipermail/buildsys/2012-June/003902.html>:

> $ mock --shell
> INFO: mock.py version 1.1.18 starting...
> State Changed: init plugins
> INFO: selinux disabled
> State Changed: start
> State Changed: lock buildroot
> State Changed: shell
> bash: /dev/null: Permission denied
> bash: /dev/null: Permission denied
> bash: /dev/null: Permission denied
> bash: /dev/null: Permission denied

... are consistent with a mock root on a filesystem mounted "nodev".
Permissions and SELinux aside, you'll suffer EACCES all day long until
the fs is remounted "dev".

-Mike