Mail Archives: cygwin/2006/06/19/15:18:32
mwoehlke wrote:
> Eric Blake wrote:
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>>
>> According to Gina Verlekar on 6/15/2006 3:53 AM:
>>> Hi,
>>>
>>> I have implemented some changes in the linker code for some intermediate
>>> processing. For that I need to create a temporary directory, generate
>>> some intermediate in it, process those files by calling a function.
>>> After processing of the intermediate files, I delete the intermediate
>>> files and the temporary directory.
>>> While this logic works fine in the linux, the temporary directory does
>>> not get deleted in cygwin.
>>
>> Windows is not Linux, and will not allow users to delete in-use
>> directories (where a directory is considered in-use if it contains files,
>> or if any process is using that directory as its current working
>> directory), nor the clean deletion of files that are still open. POSIX
>> allows this behavior, and cygwin cannot change Window's implementation of
>> deletion semantics. Just because Linux behaves nicer doesn't mean
>> that it
>> is portable to remove in-use directories. Fix your code to first close
>> all outstanding file handles before trying to remove the files, and then
>> the directory.
>>
>> That said, cygwin does try to emulate linux, and if someone were to
>> contribute a patch that would allow cygwin to emulate directory deletion
>> if it knows that all open handles have also been scheduled for unlinking
>> at process end, then http://cygwin.com/acronyms/#PTC.
>
> Not a patch, but for the record, it looks like Interix solves this
> problem (http://www.interopsystems.com/tools/tm.aspx?m=9403). Maybe
> Cygwin could do something similar?
>
> (And in case that link dies; apparently Interix has a special 'temp'
> directory where "unlinked" files are sent until their handles are all
> closed.)
>
If you take a look at the cygwin sources, you'll see that Cygwin does
something similar already. This does not solve the problem for those
that want to unlink and immediately recreate the unlinked entry though...
--
Larry Hall http://www.rfk.com
RFK Partners, Inc. (508) 893-9779 - RFK Office
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