Anchor the changes to [] only On Nov 16, 2017 3:36 AM, "Russell Senior" <[email protected]> wrote:
> Yeah, perl and perl packages count as too heavy. I'm not against > multiple steps. Super long command chains give me a thrill. I got > reasonably close, but I was having particular trouble keeping my time > formatting intact. > > > On Thu, Nov 16, 2017 at 2:01 AM, Tom <[email protected]> wrote: > > sipcalc can do this - to do this right is not trivial as it requires > > parser with lookahead or batracking. The shortening rules are designed > > to be smart not simple for parsers. > > > > sipcalc $(echo "ipv6 Thu Nov 16 00:05:34 PST 2017 > > [2603:01c2:1800:a8c0:0000:0000:0000:0001] foo bar baz" | sed > > 's/.*\[\([^]][^]]*\)\].*/\1/')|awk '/Compressed address/ {print $4}' > > 2603:1c2:1800:a8c0::1 > > > > if you want to filter the line you could wrap it in bash or insert the > > sipcal call into the awk to keep/print the text around. > > > > If you could youse perl: > > perl -e 'use Net::IP; my $ip = new Net::IP > > ("2603:01c2:1800:a8c0:0000:0000:0000:0001",6); $ip = $ip->short(); > > print ($ip."\n");' > > 2603:1c2:1800:a8c0::1 > > > > Tomas > > > > On Thu, 2017-11-16 at 00:09 -0800, Russell Senior wrote: > >> Can anyone suggest a nice unix pipeline filter using lightweight > >> tools > >> (no python) to output an ipv6 address in reduced format. That is, > >> with > >> the extra zeros removed and colons condensed according the normal > >> ipv6 > >> rules. Bonus for an example that leaves timestamps unscathed. In my > >> case, the ipv6 address is inside square brackets. For example: > >> > >> ipv6 Thu Nov 16 00:05:34 PST 2017 > >> [2603:01c2:1800:a8c0:0000:0000:0000:0001] foo bar baz > >> > >> should become: > >> > >> ipv6 Thu Nov 16 00:05:34 PST 2017 [2603:1c2:1800:a8c0::1] foo bar baz > >> > >> > > _______________________________________________ > > PLUG mailing list > > [email protected] > > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
