Cellphone tracker

#!/bin/bash
# image28:
# Didn't like how bluetooth proximity login drained my phones batteries so found a way to do it with wifi with
# no extra battery cost ( normally leave wifi up on my phone )
# SDR can be used to detect MAC address spoofing for extra security
# Will add proximity command launch code later when I figure out where I saved it

IFS=$'\n'

function track-phones()
{
    iw dev wlan0 interface add mon0 type monitor
    ifconfig mon0 up
    iw dev mon0 scan
    tcpdump -i mon0 -s 65000 -p -U
}

function start-phone-tracker()
{
    DAY=`date +%j.%Y`
    DATE=`date +%H.%M.%S.%j.%Y`
    mkdir -p ~/Cellphone-log/$DAY/
    LOGFILE=~/Cellphone-log/$DAY/phone-tracking-$DATE
    track-phones > $LOGFILE &
    PID=$!
    sleep 86400
    kill -9 $PID
    sleep 1
    tar zcf $LOGFILE.tgz $LOGFILE &

    start-phone-tracker
}