Robert Watson 6c144e7521 Introduce a new sysctl, kern.jailcansethostname, which determines whether
or not a process in a jail, with privilege, may set the jail's hostname.
Defaults to 1, which permits this.  May be set to 0 by a process with
appropriate privilege outside of jail.  Preventing hostname renaming
from within a jail is currently required to make jails manageable, as they
a currently identifiable only by hostname using /proc, which may be
modified without this sysctl being set to 0.  This will be documented
in upcoming man commits.

Authorized by:	jkh, the ever-patient
2000-02-10 05:32:03 +00:00
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