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| author | Antoine Pitrou <solipsis@pitrou.net> | 2011-11-25 20:28:15 (GMT) |
|---|---|---|
| committer | Antoine Pitrou <solipsis@pitrou.net> | 2011-11-25 20:28:15 (GMT) |
| commit | 4558bad7d64a7599b46fb56ea2df52319437f3a0 (patch) | |
| tree | 8cb5015f604888d24cf9cc88f0b3b66609f7ea27 /Lib/tempfile.py | |
| parent | fd9ebd4a361805607baea3e038652f207575ced8 (diff) | |
| download | cpython-4558bad7d64a7599b46fb56ea2df52319437f3a0.zip cpython-4558bad7d64a7599b46fb56ea2df52319437f3a0.tar.gz cpython-4558bad7d64a7599b46fb56ea2df52319437f3a0.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 48b77a8..34dff30 100644 --- a/Lib/tempfile.py +++ b/Lib/tempfile.py @@ -112,8 +112,13 @@ 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 |