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#! /bin/dash
set -euf
case "${1-all}" in
(all)
find /etc/tinc/retiolum/hosts -type f |
xargs -P 423 -n 1 "$0" one
;;
(one)
hosts_file=$2
name=$(basename $hosts_file)
if grep -q Address $hosts_file; then
script="$(sed -n '
s/[[:space:]]*//g
s/^\(Address\|Port\)=\(.*\)/\1="${\1+$\1 }\2"/p
' $hosts_file)"
eval "$script"
for address in ${Address-}; do
if nc -zw 2 $address 655 2>/dev/null; then
echo $name - $address reachable
fi &
done
wait
fi
esac
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