e0b7361b26
This is a crucial pre-condition for the org.osbuild.selinux stage to work properly, especially that it can set labels that are not present in the policy on the host. If /sys/fs/selinux is writable, setfiles will try to verify the labels via /sys/fs/selinux/context and fail for unknown labels.
110 lines
3.4 KiB
Python
110 lines
3.4 KiB
Python
#
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# Test for the build root
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#
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import pathlib
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import os
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import sys
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import tempfile
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import unittest
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import osbuild
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from osbuild.buildroot import BuildRoot
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from osbuild.monitor import NullMonitor
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from .. import test
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@unittest.skipUnless(test.TestBase.can_bind_mount(), "root-only")
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class TestBuildRoot(test.TestBase):
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"""Check BuildRoot"""
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def setUp(self):
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self.tmp = tempfile.TemporaryDirectory()
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def tearDown(self):
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self.tmp.cleanup()
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def test_basic(self):
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# This also checks the API and BuildRoot integration:
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# the runner will call api.setup_stdio and thus check
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# that connecting to the api works correctly
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runner = "org.osbuild.linux"
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libdir = os.path.abspath(os.curdir)
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var = pathlib.Path(self.tmp.name, "var")
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var.mkdir()
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monitor = NullMonitor(sys.stderr.fileno())
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with BuildRoot("/", runner, libdir=libdir, var=var) as root:
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api = osbuild.api.API({}, monitor)
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root.register_api(api)
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r = root.run(["/usr/bin/true"])
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self.assertEqual(r.returncode, 0)
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# Test we can use `.run` multiple times
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r = root.run(["/usr/bin/true"])
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self.assertEqual(r.returncode, 0)
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r = root.run(["/usr/bin/false"])
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self.assertNotEqual(r.returncode, 0)
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@unittest.skipUnless(test.TestBase.have_test_data(), "no test-data access")
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def test_bind_mounts(self):
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runner = "org.osbuild.linux"
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libdir = os.path.abspath(os.curdir)
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var = pathlib.Path(self.tmp.name, "var")
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var.mkdir()
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rw_data = pathlib.Path(self.tmp.name, "data")
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rw_data.mkdir()
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scripts = os.path.join(self.locate_test_data(), "scripts")
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monitor = NullMonitor(sys.stderr.fileno())
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with BuildRoot("/", runner, libdir=libdir, var=var) as root:
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api = osbuild.api.API({}, monitor)
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root.register_api(api)
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ro_binds = [f"{scripts}:/scripts"]
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cmd = ["/scripts/mount_flags.py",
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"/scripts",
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"ro"]
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r = root.run(cmd, readonly_binds=ro_binds)
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self.assertEqual(r.returncode, 0)
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cmd = ["/scripts/mount_flags.py",
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"/rw-data",
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"ro"]
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binds = [f"{rw_data}:/rw-data"]
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r = root.run(cmd, binds=binds, readonly_binds=ro_binds)
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self.assertEqual(r.returncode, 1)
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@unittest.skipUnless(test.TestBase.have_test_data(), "no test-data access")
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@unittest.skipUnless(os.path.exists("/sys/fs/selinux"), "no SELinux")
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def test_selinuxfs_ro(self):
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# /sys/fs/selinux must never be writable in the container
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# because RPM and other tools must not assume the policy
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# of the host is the valid policy
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runner = "org.osbuild.linux"
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libdir = os.path.abspath(os.curdir)
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var = pathlib.Path(self.tmp.name, "var")
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var.mkdir()
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scripts = os.path.join(self.locate_test_data(), "scripts")
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monitor = NullMonitor(sys.stderr.fileno())
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with BuildRoot("/", runner, libdir=libdir, var=var) as root:
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api = osbuild.api.API({}, monitor)
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root.register_api(api)
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ro_binds = [f"{scripts}:/scripts"]
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cmd = ["/scripts/mount_flags.py",
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"/sys/fs/selinux",
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"ro"]
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r = root.run(cmd, readonly_binds=ro_binds)
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self.assertEqual(r.returncode, 0)
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