Chris Mellon schrieb: > On Oct 24, 2007 11:05 PM, "Martin v. Löwis" <[EMAIL PROTECTED]> wrote: >> > So, the question is what we should do?: >> >> Before this question can be answered, I think we need to fully >> understand what precisely is happening in 2.4, and what precisely >> is happening in 2.5. >> >> AFAICT, it is *not* the case that Python 2.4 (indirectly) has >> hard-coded the names CON, PRN, NUL etc. in the C library. Instead, >> Python 2.4 *also* relies on kernel32 functions to determine that >> these files "exist". >> >> My question now is what specific kernel32 functions Python 2.4 >> calls to determine that NUL is a file; before that question >> is sufficiently answered, I don't think any action should be >> taken. >> > > > os.path.exist() in win32 just calls os.stat() and decides it doesn't > exist if an error is returned. os.stat() uses the vcrt stat()in 2.4, > but 2.5 implements it directly in terms of win32 api to deal with > limitations in the vcrt implementation. > > The hand-rolled stat uses GetFileAttributesEx, which returns 0 for the > special filenames, with an error code of "The parameter is incorrect" > (87), which is why os.path.exists() claims it doesn't exist. > > Interestingly, plain old GetFileAttributes() works, and returns > FILE_ATTRIBUTE_ARCHIVE for them.
See also a recent blog entry of Raymond Chen at http://blogs.msdn.com/oldnewthing/archive/2007/10/23/5612082.aspx Thomas _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
