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| author | Antoine Pitrou <solipsis@pitrou.net> | 2011-11-25 20:29:27 (GMT) |
|---|---|---|
| committer | Antoine Pitrou <solipsis@pitrou.net> | 2011-11-25 20:29:27 (GMT) |
| commit | c24847658fb1e676391d3db1096219581cd2782c (patch) | |
| tree | 0077927f8066b0ed872f5f2c4947e9dd13290b02 /Lib/tempfile.py | |
| parent | cad939bf9d83cd7d9f0b74076e81c3b1de16d88d (diff) | |
| parent | 4558bad7d64a7599b46fb56ea2df52319437f3a0 (diff) | |
| download | cpython-c24847658fb1e676391d3db1096219581cd2782c.zip cpython-c24847658fb1e676391d3db1096219581cd2782c.tar.gz cpython-c24847658fb1e676391d3db1096219581cd2782c.tar.bz2 | |
Issue #12856: Ensure child processes do not inherit the parent's random seed for filename generation in the tempfile module.
Patch by Brian Harring.
Diffstat (limited to 'Lib/tempfile.py')
| -rw-r--r-- | Lib/tempfile.py | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/Lib/tempfile.py b/Lib/tempfile.py index e3afa3b..39ebf5a 100644 --- a/Lib/tempfile.py +++ b/Lib/tempfile.py @@ -108,8 +108,13 @@ class _RandomNameSequence: characters = "abcdefghijklmnopqrstuvwxyz0123456789_" - def __init__(self): - self.rng = _Random() + @property + def rng(self): + cur_pid = _os.getpid() + if cur_pid != getattr(self, '_rng_pid', None): + self._rng = _Random() + self._rng_pid = cur_pid + return self._rng def __iter__(self): return self |