Need to check some host's availability by arping, but have no time to look up which network intrface you need? aarping.sh is here to help you.
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#!/bin/sh | |
if [ -z "${1}" ]; then | |
echo "Chocho?" >&2 | |
exit 1 | |
fi | |
HOSTIP="${@: -1}" | |
ROUTE=$(ip route get "${HOSTIP}") | |
if [ -z "${ROUTE}" ]; then | |
echo "Can't find the route to this host" >&2 | |
exit 1 | |
fi | |
IFACE=$(echo "${ROUTE}" | sed -rn "s/^.*dev (eth.[0-9\.]+)[[:space:]]+.*$/\1/gp") | |
if [ -z "${IFACE}" ]; then | |
echo "Can't find the interface of this host" >&2 | |
exit 1 | |
fi | |
exec arping -I "${IFACE}" ${@} |
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