Jason R. Coombs <jar...@jaraco.com> added the comment: After some in-depth analysis, I determined the following:
1) The new symlink-aware os.stat has to find the target of a symlink to properly function. 2) The previously-proposed patch uses GetFilenameByHandle in os.stat to find the target, but this fails when a handle can't be obtained (such as when a symlink points to pagefile.sys. 3) Explorer doesn't use GetFilenameByHandle. I used ProcMon to monitor the API calls when it looks up the properties for a symlink to pagefile.sys. It appears to use CreateFile and DeviceIoControl to trace through the symlink chain. So, I've written a proof of concept that determines a symlink target using these API calls. The code is in jaraco.windows.filesystem at https://svn.jaraco.com/jaraco/python/jaraco.windows/jaraco/windows/filesystem.py:trace_symlink_target . For convenience, I've pasted the most relevant code segments at http://paste.turbogears.org/paste/122986 . I'd like to get comments on this implementation before porting this to the C code and adding it to the os.stat call. One of the aspects that makes me uncomfortable is the fact that I have to call relpath between each iteration. I have tested this approach fairly thoroughly. It appears to work under all circumstances (through multiple symlinks across drives and ultimately pointing at pagefile.sys). If no one can suggest a better approach, I plan to code this into the patch. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue1578269> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
