Asterisk. Remove unavailable contacts script

broom.sh

#!/bin/bash

contacts="$(asterisk -rx 'database show registrar/contact')"

while read -r line ; do
    dbline=$(echo "$contacts" | grep ${line}  | awk '{ print $1 }' | cut -d/ -f4 | cut -d: -f1)
    echo Remove stuck contact: ${dbline}
    asterisk -rx "database deltree registrar/contact ${dbline}"
done < <(asterisk -rx 'pjsip show contacts' | grep Unavail | awk '{ print $3}')