#!/bin/bash
################################################################################
## Custom network initialization script.
## 2012-04-09
################################################################################

if [ $(id -u) -ne 0 ]; then
    echo "You must be root to run this script."
    exit
fi

NET_INTERFACE=wlan0
WPA_SUPPLICANT_CONF="/etc/wpa_supplicant.conf"
TIMEOUT_LIMIT=500

## Clean running processes if any.
pkill dhcpcd
pkill wpa_supplicant

## In case network inteface is not up.
ip link set ${NET_INTERFACE} up


## Connection.
if [ $# -eq 0 ]; then
    # Associate if needed.
    if [ "$(iwconfig ${NET_INTERFACE} | grep 'Not-Associated')" != "" ]; then
        wpa_supplicant -B -i ${NET_INTERFACE} -D wext -c "${WPA_SUPPLICANT_CONF}"
    fi

    ## Wait until wpa_supplicant has finished association.
    i=0
    while [ "$(iwconfig ${NET_INTERFACE} | grep 'off/any')" != "" ] && [ $i -lt $TIMEOUT_LIMIT ] ; do
        i=$(($i+1))
    done

	## Get IP.
    dhcpcd $NET_INTERFACE
fi