diff options
Diffstat (limited to 'Lib/tempfile.py')
| -rw-r--r-- | Lib/tempfile.py | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/Lib/tempfile.py b/Lib/tempfile.py index b6eeca3b1a..0522c79781 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: |