#!/bin/sh -x
#ESSID MAC CHANNEL ENCRYPTION WPA WPA2
# ENV:
#   root (default: /)
root=${root:-/}
cat $root/wifi_stats 2>/dev/null | (while IFS='|' read SSID MAC BANDW KEY; do
    if [ "$1" = "$SSID" -a "$2" = "$MAC" ]; then
        echo $KEY
        exit 0
    fi
done; exit 1)