#!/usr/bin/env dash

# No wifi interface? Abort!
ints=$(find /sys/class/net/*/wireless -type d)
[ -z "$ints" ] && echo "Ix" && exit

# Start watching
while :
do
    signal=$(awk 'NR==3 {print $3}' /proc/net/wireless)
    echo "I${signal%?}"
    # echo "I${signal%?},$(iwgetid --raw)"
    sleep 10
done