Message6097

Here's a simple example demonstrating the problem:

import os
for c in 254, 255, 256:
    f = unichr(c)+'.txt'
    open(f, 'w').close()
    print repr(f), 'exists', os.path.exists(f)
    os.stat(f)

When the above code is run Linux, it reports all created files as existing and exits cleanly. On Windows you get this:

D:\>jython os_stat_bug.py
u'\xfe.txt' exists True
u'\xff.txt' exists True
u'\u0100.txt' exists False
Traceback (most recent call last):
  File "os_stat_bug.py", line 6, in <module>
    os.stat(f)
  File "C:\jython2.5.1\Lib\os.py", line 478, in stat
    return stat_result.from_jnastat(_posix.stat(abs_path))
  File "C:\jython2.5.1\Lib\os.py", line 103, in error
    raise OSError(err, strerror(err), asPyString(msg))
OSError: [Errno 2] No such file or directory: 'D:\\\u0100.txt'

As the failing os.path.exists in the above code already illustrated, a bug in os.stat is pretty annoying because so many other methods depend on it. I originally noticed this problem when shutil.rmtree didn't work.

The error occurs when the stat method calls _posix.stat. This _posix is returned by a factory and in my case it was WindowsPOSIX. I was able to make our projects acceptance tests pass with this workarounds:

if sys.platform.startswith('java') and os.sep == '\\':
    os._posix = os.JavaPOSIX(os.PythonPOSIXHandler())
    os._native_posix = False

Could someone who knows Jython internals better comment is this workaround valid? Hopefully this is can be fixed in 2.5.2.