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-rw-r--r--Lib/tempfile.py26
1 files changed, 26 insertions, 0 deletions
diff --git a/Lib/tempfile.py b/Lib/tempfile.py
index b6eeca3..0522c79 100644
--- a/Lib/tempfile.py
+++ b/Lib/tempfile.py
@@ -473,6 +473,11 @@ if _os.name != 'posix' or _os.sys.platform == 'cygwin':
TemporaryFile = NamedTemporaryFile
else:
+ # Is the O_TMPFILE flag available and does it work?
+ # The flag is set to False if os.open(dir, os.O_TMPFILE) raises an
+ # IsADirectoryError exception
+ _O_TMPFILE_WORKS = hasattr(_os, 'O_TMPFILE')
+
def TemporaryFile(mode='w+b', buffering=-1, encoding=None,
newline=None, suffix="", prefix=template,
dir=None):
@@ -488,11 +493,32 @@ else:
Returns an object with a file-like interface. The file has no
name, and will cease to exist when it is closed.
"""
+ global _O_TMPFILE_WORKS
if dir is None:
dir = gettempdir()
flags = _bin_openflags
+ if _O_TMPFILE_WORKS:
+ try:
+ flags2 = (flags | _os.O_TMPFILE) & ~_os.O_CREAT
+ fd = _os.open(dir, flags2, 0o600)
+ except IsADirectoryError:
+ # Linux kernel older than 3.11 ignores O_TMPFILE flag.
+ # Set flag to False to not try again.
+ _O_TMPFILE_WORKS = False
+ except OSError:
+ # The filesystem of the directory does not support O_TMPFILE.
+ # For example, OSError(95, 'Operation not supported').
+ pass
+ else:
+ try:
+ return _io.open(fd, mode, buffering=buffering,
+ newline=newline, encoding=encoding)
+ except:
+ _os.close(fd)
+ raise
+ # Fallback to _mkstemp_inner().
(fd, name) = _mkstemp_inner(dir, prefix, suffix, flags)
try: