Re: [Bug-tar] listed-incremental broken in 1.25 on Solaris 10

[Eric Blake]

[adding bug-gnulib, and please don't top-post when replying]

On 02/02/2011 12:28 AM, Markus Duft wrote:
>>
>> Can you find out more about the file system bug?  Perhaps we
>> can test for it dynamically, and warn users about it, or something
>> like that.

> I use NTFS on interix, and i don't know what darkside uses on linux, where 
> the patch fixed the issue too (see the bug, i asked him about the filesystem).

At least one Windows file system (MVFS) has the horrible bug that
setting times on an open fd gets clobbered by a later close; cygwin
works around that issue by essentially dup'ing the fd, calling futimens
on the duplicate, closing the duplicate, then repeating the futimens on
the original, which has the net effect of flushing the change to disk in
such a manner that closing the original fd no longer clobbers state.

http://cygwin.com/ml/cygwin/2009-07/msg00734.html

I have no idea how to test for broken setups like this, or whether to
make gnulib go to that level of effort to work around it, but given the
nature of this bug report, we may have to do just that.

-- 
Eric Blake   address@hidden    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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