Hi Brane,
Is there some code path I'd trace down to confirm it's actually the
virusscanner causing the rename? Where in the code path would the
tmp-file be generated?
The call stack is probably:
svn_io_open_unique_file3
svn_stream_open_unique
....
svn_wc__open_writable_base
...
apply_textdelta
The last function is private to subversion/libsvn_wc/update_editor.c.
Thanks that helped. I traced it down and it looks like when SVN is
closing the stream to write the temp file, it gets removed from disk.
I tried to trace the issue down a bit further using Process Monitor
as suggested by Thorsten but am a bit buffled by the log. It seems to
have no record of either a rename-operation or a delete operation on
svn-BDF57639. A query on the file from the Avast succeeds while an
almost directly following query on the same file from TSVN fails.
Heh. I wonder if Avast is setting the delete-on-close flag on
Subversion's temp file. That would explain why it suddenly disappears.
Subversion definitely isn't doing that in this particular case; note
the svn_io_file_del_none parameter used in svn_wc__open_writable_base.
I can't see in the Process Monitor that Avast is actually setting that
flag. Actually I don't see anyone setting that flag. But that idea let
me to review the case, and I spotted an attribute which I overlooked
earlier:
Upon the creation of the temp file:
G:\[delete]Test\checkout_TestRepo\.svn\tmp\svn-D0145269
Desired Access: Generic Read/Write
Disposition: Create
Options: Synchronous IO Non-Alert, Non-Directory File
Attributes: n/a
ShareMode: Read, Write, Delete
AllocationSize: 0
OpenResult: Created
ShareMode Delete... That made me a bit suspicious here. Why should SVN
create that file with the share mode set to delete? Doesn't that suggest
that any other process would be allowed to change the delete-state of
that file while the handle is open? I don't know whether this is related
to the problem or not, but I'm wondering the reasoning for that (or am I
misreading that parameter --- i'm not that much into Windows file
handling tbh).
Regards,
Stefan
