On 6. sep. 2006, at 18.03, Anish Mistry wrote:
Previously posted to -questions:
In my quest to get asterisk+iaxmodem+hylafax working together in a
jail I've run into one final roadblock. I can't seem to figure out
how to create a symbolic link (ln -s doesn't work) in /dev in the
jail environment while in the jailed environment. When trying to
create a link with ln I receive:
ln -s somedev targetdev
ln: targetdev: Operation not permitted
Adding a link entry to devfs.conf in the jail fails too since it
receives the same error. I can create a link in the jailed /dev from
the host environment, so there seems to be some restriction on
creating links in /dev while in the jail. The reason I need to be
able to do this is that iaxmodem needs to create a /dev/ttyIAX device
to point to the correct ttyp* device when it starts in the jail.
Any suggestions would be appreciated.
Have you tried to change the devfs ruleset? Try to boot up a jail
without any devfs restrictions and see if your devfs.conf alias works
then.
Search for jail_example_devfs in /etc/defaults/rc.conf, and have a
look at /etc/defaults/devfs.rules. I guess specifying
jail_example_devfs_ruleset="" is enough to disable the rules.
If you succeed, you will need to find some way of enforcing rules,
but allowing what you want. Running a jail without devfs rules gives
the jail too much access to the system.
--
Frode Nordahl
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