[Sussex] Debian /etc/network/interfaces

[Alan F]

Well this has totally left me out of ideas. I'm trying to work out the
mapping stuff in debian's /etc/network/interfaces. I have this simple
shellscript which returns the value of something ($1) which was
specified on the kernel boot line. The idea behind this is that I can
specify ath0=home or ath0=work at the boot line and debian will
configure my wireless settings accordingly.

#!/bin/sh
default=MANUAL
if [ ! "$1" ]; then
        echo $default
        exit 0
fi
param=`cat /proc/cmdline | sed 's/ /\n/g' | egrep "^$1($|=)" | sed "s/^$1=//" | tr [:lower:] [:upper:]`
echo $1 = $param >>/root/netparam.debug
if [ "$param" ]; then
        echo $param
else
        echo $default
fi

And here is my /etc/network/interfaces

auto lo ath0 eth0

mapping ath0
        script /usr/local/sbin/netparam.sh
        map HOME ath0-home
        map WORK ath0-work

iface ath0-home inet dhcp
        wireless-essid blah
        wireless-key supersecret

iface ath0-work inet dhcp
        wireless-essid blah
        wireless-key supersecret


OK. Now notice the debug thingy I put in the script. When I run /etc/init.d/networking start, this is what's in it:

# cat /root/netparam.debug 
ath0 = HOME
eth0 =

And on its own..

# /usr/local/sbin/netparam.sh ath0
HOME

So the script seems to be working fine. But for some reason, my wireless settings aren't being configured. :-\

Any ideas would be greatly appreciated before I go mad,
Alan