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#!/bin/bash
set -o errexit
interface="${BLOCK_INSTANCE:-wlp3s0}"
[[ -d /sys/class/net/$interface/wireless ]] || exit 0
if [[ $(cat "/sys/class/net/$interface/operstate") = "down" ]]; then
echo OFF
echo OFF
else
quality="$(grep "$interface" /proc/net/wireless | \
awk '{ print int($3 * 100 / 70) }')"
echo "$quality%" # full text
echo "$quality%" # short text
fi
exit 0
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