Issue #16595: Add prlimit() to resource module

prlimit() is a Linux specific command that combines setrlimit, getrlimit and can set the limit
of other processes.

1 files changed, 12 insertions, 0 deletions

diff --git a/Lib/test/test_resource.py b/Lib/test/test_resource.py
index 3c9c9a8292..950f4778be 100644
--- a/Lib/test/test_resource.py
+++ b/Lib/test/test_resource.py
@@ -139,6 +139,18 @@ class ResourceTest(unittest.TestCase):
         self.assertIsInstance(resource.RLIMIT_SIGPENDING, int)
 
 
+    @unittest.skipUnless(hasattr(resource, 'prlimit'), 'no prlimit')
+    def test_prlimit(self):
+        self.assertRaises(TypeError, resource.prlimit)
+        self.assertRaises(PermissionError, resource.prlimit,
+                          1, resource.RLIMIT_AS)
+        self.assertRaises(ProcessLookupError, resource.prlimit,
+                          -1, resource.RLIMIT_AS)
+        self.assertEqual(resource.prlimit(0, resource.RLIMIT_AS), (-1, -1))
+        self.assertEqual(resource.prlimit(0, resource.RLIMIT_AS, (-1, -1)),
+                         (-1, -1))
+
+
 def test_main(verbose=None):
     support.run_unittest(ResourceTest)