#!/bin/sh

WLANDEV=wlan0
WPA_CLI="wpa_cli -i $WLANDEV -p /etc/wifi/sockets/"

wpa_up()
{
	wpa=`ps | grep wpa_supplicant | grep -v grep`
	[ "$wpa" == "" ] && \
	{
		echo "start wpa_suplicant!!!!!!!!!!!!!!!!!"
		wpa_supplicant -iwlan0 -Dnl80211 -c/etc/wifi/wpa_supplicant.conf -O/etc/wifi/sockets -B
	}
}

wifi_scan()
{
	[ ! "$(${WPA_CLI} scan)" = "OK" ] \
		&& echo "failed:wlan0 can not do scaning" \
		&& echo "====== CHECKING scan FAILED ======" \
		&& continue
	sleep 1 #wait for scaning
	aps=`${WPA_CLI} scan_results`
	sleep 1 #wait for scaning
    if [ -n "${aps}" ]; then
		echo "==============SCAN RESULTS================="
        echo "Scanned APs:"
        echo "${aps}"
		echo "==============SCAN Success=================="
        return 0
    fi

    echo "scan nothing. Make sure there are APs around"
    echo "====== CHECKING scan FAILED ======"
    exit 1

}
check_wlan(){
	ifconfig -a | grep wlan0 || {
		echo "===========Not Found wlan0========="
		exit 1
	}
}

check_wlan
wpa_up
wifi_scan