conf/181650: /etc/rc.d/jail fails if a kernel built without INET6

[Alexey Markov]

>Number:         181650
>Category:       conf
>Synopsis:       /etc/rc.d/jail fails if  a kernel built without INET6
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Aug 29 13:30:01 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Alexey Markov
>Release:        8.4-RELEASE-p3
>Organization:
JSC Complitex
>Environment:
FreeBSD host.redrat.ru 8.4-RELEASE-p3 FreeBSD 8.4-RELEASE-p3 #0: Tue Aug 27 09:33:54 MSK 2013 redrat at host.redrat.ru:/arc/obj/arc/src/sys/HOST amd64
>Description:
If a kernel built without IPv6 support then /etc/rc.d/jail fails to run with an error: "unknown parameter: ip6". This very longstanding bug already fixed in the 9.x branch but still exists in the 8.x while patch is available: http://lists.freebsd.org/pipermail/freebsd-jail/2012-November/001984.html

I have attached actual patch for 8.4 to this PR. Any chance to see this bug fixed after all? Say, in the 8.4-RELEASE-p4?

>How-To-Repeat:
Rebuild kernel with INET6 option commented out and try to run a /etc/rc.d/jail script.
>Fix:
Apply attached patch.

Patch attached with submission follows:

--- jail.orig	2013-08-27 09:58:54.000000000 +0400
+++ jail	2013-08-28 11:44:16.000000000 +0400
@@ -647,7 +647,8 @@
 		done
 
 		eval ${_setfib} jail -n ${_jail} ${_flags} -i -c path=${_rootdir} host.hostname=${_hostname} \
-			ip4.addr=\"${_addrl}\" ip6.addr=\"${_addr6l}\" ${_parameters} command=${_exec_start} > ${_tmp_jail} 2>&1
+			${_addrl:+ip4.addr=\"${_addrl}\"} ${_addr6l:+ip6.addr=\"${_addr6l}\"} \
+			${_parameters} command=${_exec_start} > ${_tmp_jail} 2>&1
 
 		if [ "$?" -eq 0 ] ; then
 			_jail_id=$(head -1 ${_tmp_jail})


>Release-Note:
>Audit-Trail:
>Unformatted: