tests: --create-sandbox doesn't umount under /run

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

Author: giuseppe

Makefile.am

@@ -16,6 +16,7 @@ EXTRA_DIST = \
 	api.h \
 	sandbox.h \
 	seccompfilter.h \
+	tests/slirp4netns-no-unmount.sh \
 	vendor/libslirp/COPYRIGHT \
 	vendor/libslirp/README.md \
 	vendor/libslirp/src/bootp.h \

tests/slirp4netns-no-unmount.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+set -xeuo pipefail
+
+. $(dirname $0)/common.sh
+
+# it is a part of test-slirp4netns.sh
+# must run in a new mount namespace
+
+mount -t tmpfs tmpfs /run
+mkdir /run/foo
+mount -t tmpfs tmpfs /run/foo
+mount --make-rshared /run
+
+unshare -n sleep infinity &
+child=$!
+
+wait_for_network_namespace $child
+
+./slirp4netns --enable-sandbox --netns-type=path /proc/$child/ns/net tun11 &
+slirp_pid=$!
+
+function cleanup {
+    kill -9 $child $slirp_pid
+}
+trap cleanup EXIT
+
+wait_for_network_device $child tun11
+
+findmnt /run/foo

tests/test-slirp4netns.sh

@@ -67,3 +67,5 @@ wait_for_network_device $child tun11
 
 nsenter --preserve-credentials -U -n --target=$child ip -a netconf | grep tun11
 nsenter --preserve-credentials -U -n --target=$child ip addr show tun11 | grep -v inet
+
+unshare -rm $(readlink -f $(dirname $0)/slirp4netns-no-unmount.sh)