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/snap/core/17284/lib/ifupdown/settle-dad.sh
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#!/bin/sh # 6 seconds maximum wait time attempts=${IF_DAD_ATTEMPTS:-60} delay=${IF_DAD_INTERVAL:-0.1} [ $attempts -eq 0 ] && exit 0 echo -n "Waiting for DAD... " for attempt in $(seq 1 $attempts); do tentative=$(ip -o -6 address list dev "$IFACE" to "${IF_ADDRESS}/${IF_NETMASK}" tentative | wc -l) if [ $tentative -eq 0 ]; then attempt=0 # This might have been our last attempt, but succesful break fi sleep $delay done if [ $attempt -eq $attempts ]; then echo "Timed out" exit 1 fi dadfailed=$(ip -o -6 address list dev "$IFACE" to "${IF_ADDRESS}/${IF_NETMASK}" dadfailed | wc -l) if [ $dadfailed -ge 1 ]; then echo "Failed" exit 1 fi echo Done
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