| # Copyright 2014 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import os |
| import subprocess |
| import sys |
| import tempfile |
| |
| # Parent passes base path as first argument. |
| child_path = os.path.join(sys.argv[1], "mountns-enter-child.py") |
| |
| # Mount tmpfs. |
| tmpdir = tempfile.mkdtemp(prefix="newns-", dir="/tmp") |
| ret = subprocess.check_call(["mount", "tmpfs", tmpdir, "-t", "tmpfs"]) |
| test_file = os.path.join(tmpdir, "test") |
| with open(test_file, "w") as t: |
| print >> t, "test" |
| |
| # Exec child and enter existing mount namespace. |
| ret = subprocess.call(["/sbin/minijail0", "-V", "/proc/1/ns/mnt", "--", |
| sys.executable, child_path, test_file]) |
| |
| # Clean up. |
| subprocess.check_call("umount %s" % tmpdir, shell=True) |
| os.rmdir(tmpdir) |
| |
| # Return child's exit status. |
| sys.exit(ret) |
