Date: Fri, 18 Oct 2013 21:53:39 +0200 From: Dirk Engling <erdgeist@erdgeist.org> To: freebsd-jail@FreeBSD.org Subject: Patch: make the jail(8) command set the jid parameter Message-ID: <526191C3.7090902@erdgeist.org>
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Hello,
I've created a patch to the jail command that allows statements like
exec.poststart = "touch /startjailid_${jid}";
exec.prestop = "touch /stopjailid_${jid}";
in a jail.conf work as expected, even if the jid is not specified there,
i.e. for jails without a pinned jid.
It works by splitting variable substitution in two parts. In the first
pass a missing jid parameter is ignored, running_jid and the IP__OP
create operation will then set the jail's jid parameter and try to
resolve any references not done before.
The code should probably check for references to $jid before it is
available (i.e. in the exec.prestart variable), but just substituting
the empty string as it happens now should be just fine.
Find the patch at
https://erdgeist.org/arts/software/jail/usr.sbin.jail-jid.patch
Regards,
erdgeist
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