Paul Doom added the comment:
Can the _mkstemp_inner portion of Billy McCulloch's patch be applied? Due to a
large default os.TMP_MAX value (2147483647 - seems to be the current value on
Win 7/8.1/10 I have access to), the following will push the CPU to 100% for a
very long time when run under a non-elevated shell:
--
import tempfile
tempfile.TemporaryFile(dir='C:\Windows')
... wait ...
--
In _mkstemp_inner() we should be testing for the filename, not parent directory
here:
except PermissionError:
# This exception is thrown when a directory with the chosen name
# already exists on windows.
if (_os.name == 'nt' and _os.path.isdir(dir) and
_os.access(dir, _os.W_OK)):
continue
Changing the _os.path.isdir(dir) call to _os.path.isdir(filename) is all that
is needed to prevent the death loop and function correctly in cases where
Windows os.access(dir, _os.W_OK) claims we have write access when we do not.
----------
nosy: +Paul Doom
type: behavior -> resource usage
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<http://bugs.python.org/issue22107>
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