Highlighting Long a Lines

This is a simple configuration for detecting when a line is over a certain length within VIM. This uses a option called colorcolumn which is only available when compiled with the syntax feature.

highlight ColorColumn ctermfg=white ctermbg=darkred guibg=darkred

That will highlight the column one character after the textwidth. If the textwidth is zero, then this will not be used.

Unrar Bug

So I was recently scripting with the unrar tool and discovered something was wrong.

$ unrar t file.rar
UNRAR 3.80 freeware Copyright (c) 1993-2008 Alexander Roshal
file.rar is not RAR archive
$ echo $?

It was returning zero all the time, even when the file wasn’t a rar. This is obviously wrong but also makes it very unhelpful for using in scripting. Fortunately enough a mate on IRC discovered that his version did it correctly.

So I first download the existing SRPM and installed it:

$ yumdownloader --source unrar
$ rpm -i unrar*.srpm

Then I installed that and simply modified so I downloaded the latest version, created a RPM and installed.

I have submitted the a bug report to RPMfusion.

WPA2 Wireless With Linux

This is a simple tutorial produced by me and my good mate enigma. It is aimed at Gentoo and uses the Broadcom drivers but this should replicate to other systems.

The first step is to get your drivers and for Broadcom, which is relatively easy as they produce them for us. So first download the driver (these drivers support BM4311-, BCM4312-, BCM4321-, and BCM4322-based cards) and was also successful in this case with BCM4328.

Check that the package ‘linux-headers’ is installed, this is really just for completeness sakes. Gentoo would not work for long without this package!(gentoo)# emerge linux-headers
... output ...

Unpack the downloaded drivers and build for your current kernel:
(gentoo)# tar -xzf hybrid-portsrc-ARCH-VERSION.tar.gz
(gentoo)# make -C /lib/modules/`uname -r`/build M=`pwd`
... output ...

Remove any existing wireless drivers.
(gentoo)# rmmod ndiswrapper b43 ssb bcm43xx b43legacy

Add in some modules required for WPA wireless:
(gentoo)# modprobe ieee80211_crypt_tkip

Test the newly built wireless driver:
(gentoo)# insmod wl.ko
(gentoo)# iwconfig
.. output ...
(gentoo)# iwlist scanning
... output ...

If that is working we can copy in the driver to the kernel and add to the autoload:
(gentoo)# cp wl.ko /lib/modules/`uname-r`/kernel/net/wireless/
(gentoo)# rmmod wl
(gentoo)# modprobe wl
(gentoo)# echo 'wl' >>/etc/modules.autoload.d/kernel-2.6

So now we have a working driver we can go on to configure for WPA. Alter the /etc/conf.d/net (note we assume that eth0 is wireless):
# Prefer wpa_supplicant over wireless-tools
modules=( "wpa_supplicant" )
# It's important that we tell wpa_supplicant which driver we should
# be using as it's not very good at guessing yet

Next set up the network in the /etc/wpa_supplicant/wpa_supplicant.conf:
# This setting is required or the connection will not work
# Ensure that only root can read the WPA configuration
# Let wpa_supplicant take care of scanning and AP selection
# Only WPA-PSK is used. Any valid cipher combination is accepted
proto=WPA RSN # RSN is needed for WPA2
pairwise=CCMP TKIP
group=CCMP TKIP WEP104 WEP40
#The higher the priority the faster it connects

And that is it, you should find that your wireless is enabled on boot.
Thanks should also go to DJ Kaos for the preparation of the driver.

Renaming Files In A Directory

So I had a problem on Windows in that I have lots of directories that are named correctly but I wish the files under them to be uniformly named.

The solution was to use PowerShell, which is an extremely effective scripting tool for Windows, especially if you come from a UNIX shell background.

There is actually quite a lot of documentation available for it and rather than go into detail I will simply show you the script:

# RenameDirectoryFiles.ps1
param( [string[]]$paths )
Set-PSDebug -Strict
foreach ( $path in $paths ) {
    if ( !(Test-Path $path -PathType Container) ) {
        Write-Error "'$path' doesn't exist or isn't a directory"
        exit 1
    $i = 0
    Get-ChildItem $path | sort FullName | foreach {
        $tmp = "{0:000}" -f $i
        $ext = $_.Extension
        $newname = "$path - $tmp$ext"
        Rename-Item $_.fullname $newname
        $i = $i + 1

So the usage is extremely simple:

RenameDirectoryFiles.ps1 'My Directory'

After which all the files under ‘My Directory’ will be renamed to ‘My Directory – 000.fileextension’.

GPG Errors

Sometimes when you are installing RPM’s or Deb’s you will find yourself faced with GPG errors. Instead of ignoring them why not fix them!

Simply download the key by using the GPG tool:

gpg --keyserver pgpkeys.mit.edu --recv-key E6F33B6628973CC0

Then import that key into either APT:

gpg -a --export 010908312D230C5F | sudo apt-key add -

Or with RPM:

gpg --export -a 010908312D230C5F >key.txt
rpm --import key.txt


Fun with Bmotion

I help out now and then with little bits of code for BMotion, the main coder is JamesOff. It is a wonderful set of scripts for AI on eggdrops. Sometimes bmotion can just spark. Check this conversation I had, both NoTopic and MonicaOff are running bmotion.

(@  NoTopic) Uh oh, it's mark.
(+      znx) listen nt .. im tired of your shit
(         *) znx kicks the crap out of nt
(         *) NoTopic passes it on to james
(+      znx) um
(+      znx) :[
(@MonicaOff) cheer up mak
(@MonicaOff) *hugs*
(+      znx) aww
(+      znx) i love you mon
(         *) znx hugs
(@MonicaOff) Hehe, want to go out on a date someplace? :)
(+      znx) sure!
(+      znx) where would you like to go mon?
(@MonicaOff) Amsterdam.
(+      znx) ooo
(         *) znx books the flights
(+ JamesOff) sounds nice :P
(@  NoTopic) oh categorically abyss what do you think, talking ass?
(+      znx) your just annoyed im not taking you nt
(         *) znx shows nt the flight tickets
(@  NoTopic) ooooh, impressive!
(+      znx) :P !!
(         *) NoTopic steals the flight tickets and runs off
(@  NoTopic) ALL MINE NOW^@~#%~£~$$~*£$$$
(+      znx) W T F
(         *) NoTopic sells the flight tickets on ebay
(+      znx) NOOOOOOOOOOooooooooooooooooooo
(         *) znx sulks at nt
(@  NoTopic) what

Of course sometimes bmotion is just plain evil!