From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jason Andryuk <jason.p.andryuk@aero.org>
Subject: Re: [PATCH 5/5] hotplug/linux: Add IPv6 support to
	vif-route
Date: Fri, 16 May 2014 15:17:21 -0400
Message-ID: <53766441.50008@aero.org>
References: <1400081005-23895-1-git-send-email-s.munaut@whatever-company.com>	<1400081005-23895-6-git-send-email-s.munaut@whatever-company.com>
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To: Ian Campbell <Ian.Campbell@citrix.com>, Sylvain Munaut <s.munaut@whatever-company.com>
Cc: xen-devel@lists.xenproject.org
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On 5/15/2014 12:20 PM, Ian Campbell wrote:
> On Wed, 2014-05-14 at 17:23 +0200, Sylvain Munaut wrote:
>> Signed-off-by: Sylvain Munaut <s.munaut@whatever-company.com>
>> ---
>>   tools/hotplug/Linux/vif-common.sh |   33 +++++++++++++++++++++++++++++++++
>>   tools/hotplug/Linux/vif-route     |   20 +++++++++++++++++++-
>>   2 files changed, 52 insertions(+), 1 deletion(-)
>>
>> diff --git a/tools/hotplug/Linux/vif-common.sh b/tools/hotplug/Linux/vif-common.sh
>> index 2f24274..cd341a33 100644
>> --- a/tools/hotplug/Linux/vif-common.sh
>> +++ b/tools/hotplug/Linux/vif-common.sh
>> @@ -324,3 +324,36 @@ dom0_ip()
>>     fi
>>     echo "$result"
>>   }
>> +
>> +
>> +##
>> +# ip6_of interface
>> +#
>> +# Print the first IPv6 address currently in use at the given interface, or nothing if
>> +# the interface is not up.
>> +#
>> +ip6_of()
>> +{
>> +        ip -6 addr show primary dev "$1" | perl -wane '/scope global/ && /inet6 (([0-9a-f]+:*)+)/ && print $1;'
> 
> Hrm, Perl again. Can this be done with awk? Looks tricky though.

Something like:
awk '/inet6 .* scope global/ { split($2, v6, "/"); print v6[1] }'

(Removing perl from locking.sh would be nice, since it's a large requirement for the one use.)

Regards,

Jason