rsync - Sep 2005 - --backup leaves window where file doesn't exist.

When using --backup, the sequence (as monitored by strace) is:

   rename("/path/to/<file>",
"<backup-dir>/<file><backup-suffix>")
   rename("/path/to/.<file>.xxxxxx",
"/path/to/<file>")

This, of course, leaves a momentary window wherein <file> can't be
found. Might
it be possible to replace the first rename() with link() instead? This, of
course, could only be done when the backup directory is on the same volume.

-- 
Dave Mielke           | 2213 Fox Crescent | I believe that the Bible is the
Phone: 1-613-726-0014 | Ottawa, Ontario   | Word of God. Please contact me
EMail: dave@mielke.cc | Canada  K2A 1H7   | if you're concerned about Hell.
http://FamilyRadio.com/                   | http://Mielke.cc/bible/

On Thu, Sep 15, 2005 at 08:45:00AM -0400, Dave Mielke
wrote:
> When using --backup, the sequence (as monitored by strace) is:
> 
>    rename("/path/to/<file>",
"<backup-dir>/<file><backup-suffix>")
>    rename("/path/to/.<file>.xxxxxx",
"/path/to/<file>")
> 
> This, of course, leaves a momentary window wherein <file> can't
be found. Might
> it be possible to replace the first rename() with link() instead? This, of
> course, could only be done when the backup directory is on the same volume.
Good catch.  But what about when backup-dir is not on same filesystem
as original?  link will give EXDEV, I think.

-chris
> 
> -- 
> Dave Mielke           | 2213 Fox Crescent | I believe that the Bible is the
> Phone: 1-613-726-0014 | Ottawa, Ontario   | Word of God. Please contact me
> EMail: dave@mielke.cc | Canada  K2A 1H7   | if you're concerned about
Hell.
> http://FamilyRadio.com/                   | http://Mielke.cc/bible/
> -- 
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