Martin v. Löwis added the comment: I've studied the problem with Process Monitor. If a file is hidden, open(f, "w") fails, whereas os.open(f, os.W_OK|os.O_CREAT) succeeds.
In the succeeding call, process monitor reports Desired Access: Generic Read/Write Disposition: OpenIf Options: Synchronous IO Non-Alert, Non-Directory File Attributes: N ShareMode: Read, Write AllocationSize: 0 OpenResult: Opened In the failing call, it reports Desired Access: Generic Write, Read Attributes Disposition: OverwriteIf Options: Synchronous IO Non-Alert, Non-Directory File Attributes: N ShareMode: Read, Write AllocationSize: 0 I then tried os.open(f, os.W_OK|os.CREAT|os.O_TRUNC) which also fails, giving Desired Access: Generic Read/Write Disposition: OverwriteIf Options: Synchronous IO Non-Alert, Non-Directory File Attributes: N ShareMode: Read, Write AllocationSize: 0 So it fails for FILE_OVERWRITE_IF, but succeeds for FILE_OPEN_IF. These map back to CREATE_ALWAYS and OPEN_ALWAYS - apparently, you can't truncate a hidden file on Vista. __________________________________ Tracker <[EMAIL PROTECTED]> <http://bugs.python.org/issue1862> __________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
