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