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#!/bin/sh
[ "$(uci get network.globals.ula_prefix)" != "auto" ] && exit 0
r1=$(dd if=/dev/urandom bs=1 count=1 |hexdump -e '1/1 "%02x"')
r2=$(dd if=/dev/urandom bs=2 count=1 |hexdump -e '2/1 "%02x"')
r3=$(dd if=/dev/urandom bs=2 count=1 |hexdump -e '2/1 "%02x"')
uci -q batch <<-EOF >/dev/null
set network.globals.ula_prefix=fd$r1:$r2:$r3::/48
commit network
EOF
exit 0
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