Jails that keep hanging around

[Melvyn Sopacua]

On Sunday 15 February 2004 20:56, Maxim Konovalov wrote:
> On Sun, 15 Feb 2004, 20:49+0100, Melvyn Sopacua wrote:
> > On Sunday 15 February 2004 19:44, Melvyn Sopacua wrote:
> > > (poking around sys/kern/kern_jail.c to try and get the value
> > > p->pr_ref).
> >
> > Ok, I'm stuck. How does one get a struct prison (read-only for all I
> > care), when only having a jail id, in userland?
>
> As I already wrote sysctl -o security.jail.list.

No, a 'struct prison' in C. All you get with sysctlbyname is xprison, which 
doesn't expose the prison structure (which holds the refcount). Seems I'll 
have to go through kvm_open -> proc -> td_ucred -> cr_prison and some 
forking.
-- 
Melvyn

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