bpo-38692: Skip test_posix.test_pidfd_open() on EPERM (GH-17290)

vstinner · web-flow · commit 3ab479a2d195 · 2019-11-21T12:54:54.000+01:00
Skip the test_posix.test_pidfd_open() test if os.pidfd_open() fails
with a PermissionError. This situation can happen in a Linux sandbox
using a syscall whitelist which doesn't allow the pidfd_open()
syscall yet (like systemd-nspawn).
diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py
@@ -1476,6 +1476,8 @@ def test_pidfd_open(self):
             os.pidfd_open(-1)
         if cm.exception.errno == errno.ENOSYS:
             self.skipTest("system does not support pidfd_open")
+        if isinstance(cm.exception, PermissionError):
+            self.skipTest(f"pidfd_open syscall blocked: {cm.exception!r}")
         self.assertEqual(cm.exception.errno, errno.EINVAL)
         os.close(os.pidfd_open(os.getpid(), 0))
 
diff --git a/Misc/NEWS.d/next/Tests/2019-11-20-15-42-06.bpo-38692.aqAvyF.rst b/Misc/NEWS.d/next/Tests/2019-11-20-15-42-06.bpo-38692.aqAvyF.rst
@@ -0,0 +1,3 @@
+Skip the test_posix.test_pidfd_open() test if ``os.pidfd_open()`` fails with a
+:exc:`PermissionError`. This situation can happen in a Linux sandbox using a
+syscall whitelist which doesn't allow the ``pidfd_open()`` syscall yet.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	+Skip the test_posix.test_pidfd_open() test if ``os.pidfd_open()`` fails with a
	`2`	+:exc:`PermissionError`. This situation can happen in a Linux sandbox using a
	`3`	+syscall whitelist which doesn't allow the ``pidfd_open()`` syscall yet.