#!/bin/sh

set -e

base=$(dirname "$(readlink -f "$0")")
cd "${base}"

instance=$1
ifname=$2

if [ -z "${instance}" -o -z "${ifname}" ]; then
    echo >&2 "Syntax: $0 instancename clientifname"
    exit 1
fi

targetname="/var/lib/prometheus/node-exporter/capport-${instance}.prom"
tmpname="${targetname}.$$"

if [ -f "/run/netns/${instance}" ];then
	_run_in_ns="/usr/sbin/ns-enter ${instance} -- "
else
	_run_in_ns=""
fi
if ${_run_in_ns} ${base}/stats.sh "${ifname}" > "${tmpname}"; then
    mv "${tmpname}" "${targetname}"
else
    rm "${tmpname}"
    exit 1
fi