sed for dns hackers

(Requires gnu sed)

Moving to a new set of nameservers is a bit like moving house. Lots of stuff thrown away for reasons of unreasonable antiquity, lots of stuff could do with a refresh and cleanup.

sed -i.bak '/\(NS\|SOA\)/ s/\bdns1\.example\.org/innerdns1.example.org/g; /\(NS\|SOA\)/ s/\bdns2\.example\.org/innerdns2.example.org/g' master/*

This simple, pretty oneliner fixes NS and SOA records to point to new addresses, and leaves other records alone - unless you have really unfortunate and awkward capital-letter names in your zones. Add some more \b safeguards if so.

Japanese WHOIS fun

Recently, I wanted to look up info on a Japanese domain name. Being a command-line type of guy, I obviously did $ whois ac.jp and expected things to work out.

Well, things were a bit less helpful than I'd hoped.

$ whois ac.jp
Domain Information: [%I%a%$%s>pJs]
a. [%I%a%$%sL>]                 AC.JP
e. [$=$7$-$a$$]
f. [AH?%L>]                     3X=Q%I%a%$%s
g. [Organization]               Academic Domain
k. [AH?%<oJL]
l. [Organization Type]
m. [EPO?C4Ev<T]
n. [5;=QO"MmC4Ev<T]
p. [%M!<%`%5!<%P]               a.dns.jp
p. [%M!<%`%5!<%P]               b.dns.jp
p. [%M!<%`%5!<%P]               c.dns.jp
p. [%M!<%`%5!<%P]               d.dns.jp
p. [%M!<%`%5!<%P]               e.dns.jp
p. [%M!<%`%5!<%P]               f.dns.jp
p. [%M!<%`%5!<%P]               g.dns.jp
[>uBV]                          Reserved
[EPO?G/7nF|]
[@\B3G/7nF|]
[:G=*99?7]                      2005/03/30 17:37:52 (JST)

While I can figure out what I need here, why the garble? This is 2010 and I'm running in a UTF-8 locale with proper fonts; I should see hiragana/katakana/kanji just fine.

So I looked up the current WHOIS protocol. That's probably the shortest RFC I've ever seen.

The interesting bit: "The WHOIS protocol has no mechanism for indicating the character set in use." ... rrrright. Obviously not UTF-8 on this server.

Some trial and error, then.

$ whois ac.jp > gnark.txt
$ file gnark.txt
gnark.txt: ASCII English text, with escape sequences

Oh thank you. Very helpful. (irritated hacking ensues)

End product (bash function):

function jwhois { whois "$@" | iconv -f iso-2022-jp ; }

$ jwhois ac.jp
Domain Information: [ドメイン情報]
a. [ドメイン名]                 AC.JP
e. [そしきめい]
f. [組織名]                   学術ドメイン
g. [Organization]            Academic Domain
k. [組織種別]
l. [Organization Type]
m. [登録担当者]
n. [技術連絡担当者]
p. [ネームサーバ]              a.dns.jp
p. [ネームサーバ]              b.dns.jp
p. [ネームサーバ]              c.dns.jp
p. [ネームサーバ]              d.dns.jp
p. [ネームサーバ]              e.dns.jp
p. [ネームサーバ]              f.dns.jp
p. [ネームサーバ]              g.dns.jp
[状態]                        Reserved
[登録年月日]
[接続年月日]
[最終更新]                     2005/03/30 17:37:52 (JST)

Looks better, yes?

P.S. This was written using FreeBSD whois. Ubuntu whois acts completely differently - specifically asks for and shows English information in English locales, and breaks interestingly in the Japanese locales I've tested.

Wine on Windows...

The Wine project is preparing the long-awaited 1.2 release for the end of the month.

Stuff like this should help morale:

Gothic I & II not working on Windows 7

Working around a longstanding d3d driver bug by instead running via crosscompiled d3d8+wined3d on OpenGL on Windows. :)

Fun hardware - first results

Testing the Fusion-io ioXtreme 80GB (/dev/fioa) vs Intel X25-M gen 2 160G (/dev/sda). The non-directio dd went cpu-limited for some reason, needs looking into.

792 MB/s read speed at 12% cpu use in the directio case looks a bit promising :)

# dd if=/dev/fioa2 of=/dev/null bs=1M
26723+1 records in
26723+1 records out
28021615104 bytes (28 GB) copied, 201.797 s, 139 MB/s
# dd if=/dev/fioa2 of=/dev/null bs=1M iflag=direct
19792+0 records in
19791+0 records out
20752367616 bytes (21 GB) copied, 26.2142 s, 792 MB/s

# dd if=/dev/sda4 of=/dev/null bs=1M
5157+0 records in
5156+0 records out
5406457856 bytes (5.4 GB) copied, 25.136 s, 215 MB/s
# dd if=/dev/sda4 of=/dev/null bs=1M iflag=direct
6040+0 records in
6039+0 records out
6332350464 bytes (6.3 GB) copied, 26.1701 s, 242 MB/s

Stay tuned, more to come...

Fedora kernel on Ubuntu Lucid 10.04

I had need of a Fedora Core 12 kernel lately. Testing the fun hardware of the previous post.

Turns out that running that kernel with Ubuntu 10.04 userspace is pretty easy. Alien + some dkms invocations are enough.

fakeroot alien kernel-2.6.31.5-127.fc12.x86_64.rpm
fakeroot alien kernel-devel-2.6.31.5-127.fc12.x86_64.rpm

dpkg -i kernel_2.6.31.5-128_amd64.deb
dpkg -i kernel-devel_2.6.31.5-128_amd64.deb

update-initramfs -c -k 2.6.31.5-127.fc12.x86_64

dkms build -m nvidia-current -v 195.36.15 -k 2.6.31.5-127.fc12.x86_64
dkms install -m nvidia-current -v 195.36.15 -k 2.6.31.5-127.fc12.x86_64

update-initramfs -u -k 2.6.31.5-127.fc12.x86_64

update-grub

et voila:

knan@sarevok:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 10.04 LTS
Release: 10.04
Codename: lucid
knan@sarevok:~$ uname -a
Linux sarevok 2.6.31.5-127.fc12.x86_64 #1 SMP Sat Nov 7 21:11:14 EST 2009 x86_64 GNU/Linux

Tease

Now, if only I had the rest of the New! Shiny! computer handy, this would be a very fun weekend... as is, I'll just have to tease and promise benchmarks & impressions in a few weeks' time.

Buona sera!

htrosbif gets better

Alpha 4 is out now.

More signatures, more tests, and even bugs fixed. Imagine.

Git repo: git clone http://anduin.net/~knan/htrosbif.git/