rename(2) using NTFS transactions on Vista/2008
Mon May 19 18:53:00 GMT 2008
According to Corinna Vinschen on 5/15/2008 12:03 PM:
> I just applied a patch (rather, three patches) which uses the new
> transactional NTFS (TxF) feature introduced with Vista/2008 to add
> atomicity in a few border cases of the rename(2) function. POSIX
> requires that rename(2) works atomically, but without the new
> transactions, not all cases can be implemented atomically under Windows.
cygwin-1.7.0-9 had problems with rename("file","link") returning a
spurious ENOENT. But I haven't been able to test 1.7.0-10 yet, to see if
it has been fixed.
Meanwhile, while looking at the code, is it really a good idea to have 3
stack-allocated path_conv variables, each 32k in size? That sounds like a
recipe for disaster if the user's app is nearly at the end of the stack,
and the 32k path_conv straddles the guard page, such that the stack growth
faults outside of the guard page.
Don't work too hard, make some time for fun as well!
Eric Blake email@example.com
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