[Haskell-cafe] Re: Darcs and NFS Resolution
Brandon S. Allbery KF8NH
allbery at ece.cmu.edu
Sat Sep 12 17:40:51 EDT 2009
On Sep 12, 2009, at 11:22 , Trent W. Buck wrote:
> Jason Dagit <dagit at codersbase.com> writes:
>>> which ensures that when the operating system is not WIN32, that
>>> renaming of files will be performed by the OS shell.
> I'm also puzzled as to why this works -- surely mv(1) assumes POSIX
> semantics, too? I would be interested in seeing the exact error
> transcript, preferably as an issue on bugs.d.n. I'm not sure the
> problem has been diagnosed correctly.
In order to handle the case where you're moving across filesystems,
mv(1) gracefully degrades to cp + rm. rename(2) does not. This also
happens to work around compatibility issues with native CIFS (and
possibly older HP/UX, not that anyone likely cares).
>> Yes, and in the meantime we can implement something like this in
> I definitely think this SHOULD NOT be enabled by default, unless
> going to ONLY enable it in the specific scenario of CIFS on Linux.
I definitely think you've made incorrect assumptions; the proposed
workaround is reasonable even if not ideal. (I would fall back to the
mv(1) method only if rename(2) fails.)
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university KF8NH
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