STINNER Victor added the comment:
> Just catch any OSError?
If possible, I would prefer to not retry O_TMPFILE each time if the kernel
version does not support the flag.
Pseudo-code:
--
if o_tmpfile_supported:
try:
fd = os.open(dir, os.O_TMPFILE | ...)
except IsADirectoryError:
# Linux kernel older than 3.11 ignores O_TMPFILE flag
o_tmpfile_supported = False
except OSError:
# the filesystem doesn't support O_TMPFILE
pass
else:
return io.open(fd, ...)
# fallback to unsafe but portable implementation
# current code generating a name and using unlink
---
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<http://bugs.python.org/issue21515>
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