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, 13 insertions, 0 deletions

diff --git a/Lib/uuid.py b/Lib/uuid.py
index b4554e4..fda9fe1 100644
--- a/Lib/uuid.py
+++ b/Lib/uuid.py
@@ -427,6 +427,19 @@ try:
         if hasattr(lib, 'uuid_generate_time'):
             _uuid_generate_time = lib.uuid_generate_time
 
+    # The uuid_generate_* functions are broken on MacOS X 10.6, as noted
+    # in issue #8621 the function generates the same sequence of values
+    # in the parent process and all children created using fork (unless
+    # those children use exec as well).
+    #
+    # Assume that the uuid_generate functions are broken from 10.6 onward,
+    # the test can be adjusted when a later version is fixed.
+    import sys
+    if sys.platform == 'darwin':
+        import os
+        if int(os.uname()[2].split('.')[0]) >= 10:
+            _uuid_generate_random = _uuid_generate_time = None
+
     # On Windows prior to 2000, UuidCreate gives a UUID containing the
     # hardware address.  On Windows 2000 and later, UuidCreate makes a
     # random UUID and UuidCreateSequential gives a UUID containing the