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#!/bin/sh
wlan_int=wlan0
/sbin/ip link show dev ${wlan_int} >/dev/null 2>&1 || exit 1
/sbin/ip link show dev ${wlan_int} 2>&1 |fgrep -q -e"state DOWN" && exit 1
LINK_QUALITY=$( /sbin/iwconfig "${wlan_int}" 2>&1 |fgrep -e'Link Quality' |tr -s ' ' |cut -d' ' -f3 |cut -d= -f2 )
echo "{${LINK_QUALITY}}"
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