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1 files changed, 32 insertions, 0 deletions

diff --git a/src/python/stdlib/test/test_wait4.py b/src/python/stdlib/test/test_wait4.py
new file mode 100644
index 0000000..d04a11b
--- /dev/null
+++ b/src/python/stdlib/test/test_wait4.py
@@ -0,0 +1,32 @@
+"""This test checks for correct wait4() behavior.
+"""
+
+import os
+import time
+from test.fork_wait import ForkWait
+from test.test_support import run_unittest, reap_children, get_attribute
+
+# If either of these do not exist, skip this test.
+get_attribute(os, 'fork')
+get_attribute(os, 'wait4')
+
+
+class Wait4Test(ForkWait):
+    def wait_impl(self, cpid):
+        for i in range(10):
+            # wait4() shouldn't hang, but some of the buildbots seem to hang
+            # in the forking tests.  This is an attempt to fix the problem.
+            spid, status, rusage = os.wait4(cpid, os.WNOHANG)
+            if spid == cpid:
+                break
+            time.sleep(1.0)
+        self.assertEqual(spid, cpid)
+        self.assertEqual(status, 0, "cause = %d, exit = %d" % (status&0xff, status>>8))
+        self.assertTrue(rusage)
+
+def test_main():
+    run_unittest(Wait4Test)
+    reap_children()
+
+if __name__ == "__main__":
+    test_main()