setup_wifi.sh

#!/usr/local/bin/bash

if [ $# -ne 1 ]; then
    echo "Usage: # ./setup_wifi.sh wifi_name"
    echo "The \`wifi_name' is used for filename: /var/wpa_supplicant_[wifi_name].conf"
    exit 1
fi

if [ $UID -ne 0 ]; then
    echo "You must be a root."
    exit 2
fi

CONF_PATH="/var/wpa_supplicant_$1.conf"

if [ ! -f ${CONF_PATH} ]; then
    echo "${CONF_PATH} is not found."
    exit 3
fi

if [ ! -r ${CONF_PATH} ]; then
    echo "${CONF_PATH} can not be read."
    exit 4
fi

ifconfig wlan0 destroy
ifconfig wlan create wlandev run0 up
wpa_supplicant -B -i wlan0 -c ${CONF_PATH}