1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# 4# Execute a subprocess in a network namespace 5 6set -e 7 8readonly NETNS="ns-$(mktemp -u XXXXXX)" 9 10setup() { 11 ip netns add "${NETNS}" 12 ip -netns "${NETNS}" link set lo up 13} 14 15cleanup() { 16 ip netns del "${NETNS}" 17} 18 19trap cleanup EXIT 20setup 21 22ip netns exec "${NETNS}" "$@" 23exit "$?" 24