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Issue #12856: Ensure child processes do not inherit the parent's random seed for filename generation in the tempfile module.

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Patch by Brian Harring.
This commit is contained in:
Antoine Pitrou 2011-11-25 21:29:27 +01:00
commit c24847658f
3 changed files with 43 additions and 2 deletions
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9
Lib/tempfile.py
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@ -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