Merged revisions 80786 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/branches/py3k

................
  r80786 | ronald.oussoren | 2010-05-05 17:32:33 +0200 (Wed, 05 May 2010) | 16 lines

  Merged revisions 80784 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

  ........
    r80784 | ronald.oussoren | 2010-05-05 16:48:37 +0200 (Wed, 05 May 2010) | 9 lines

    The C function used by uuid.uuid4 is broken on
    OSX 10.6 in that after os.fork() the parent and
    child generate the same sequence of UUIDs.

    This patch falls back to the the Python implementation
    on OSX 10.6 or later.

    Fixes issue #8621.
  ........
................

1 files changed, 28 insertions, 0 deletions

diff --git a/Lib/test/test_uuid.py b/Lib/test/test_uuid.py
index 696ffb1..a1663c5 100644
--- a/Lib/test/test_uuid.py
+++ b/Lib/test/test_uuid.py
@@ -451,6 +451,34 @@ class TestUUID(TestCase):
             equal(u, uuid.UUID(v))
             equal(str(u), v)
 
+    def testIssue8621(self):
+        import os
+        import sys
+        if os.name != 'posix':
+            return
+
+        # On at least some versions of OSX uuid.uuid4 generates
+        # the same sequence of UUIDs in the parent and any
+        # children started using fork.
+        fds = os.pipe()
+        pid = os.fork()
+        if pid == 0:
+            os.close(fds[0])
+            value = uuid.uuid4()
+            os.write(fds[1], value.hex.encode('latin1'))
+            os._exit(0)
+
+        else:
+            os.close(fds[1])
+            parent_value = uuid.uuid4().hex
+            os.waitpid(pid, 0)
+            child_value = os.read(fds[0], 100).decode('latin1')
+
+            self.assertNotEqual(parent_value, child_value)
+
+
+
+
 
 def test_main():
     support.run_unittest(TestUUID)