#!/bin/sh# SPDX-License-Identifier: GPL-2.0## Execute a subprocess in a network namespaceset -e
readonlyNETNS="ns-$(mktemp -u XXXXXX)"
setup(){
ip netns add "${NETNS}"
ip -netns "${NETNS}" link set lo up
}
cleanup(){
ip netns del "${NETNS}"}trap cleanup EXIT
setup
ip netns exec"${NETNS}""$@"exit"$?"