R help - Nov 2009 - Utility function to rotate log files?

I am wondering if there is a CRAN package that includes a utility 
function that will "rotate" file names, in the same sense that 
operating systems sometimes rotate log files. Or maybe there's 
something in base R.

That is, we have a set of file names, say file1, file2, file3, and 
when the function is called, file3 is deleted, file2 is renamed 
file3, file1 is renamed file2, and the name of file1 is returned to 
the user's script, which then writes to file1.

I've done some searching (RSiteSearch) but haven't found anything.

Thanks
-Don
-- 
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA
925-423-1062

You can try something about like this:

foo <- function() {
	unlink("file3.txt")
	file.rename("file2.txt", "file3.txt")
	file.rename("file1.txt", "file2.txt")
	sink("file1.txt")
	cat("test file1")
	sink()
}




On Fri, Nov 13, 2009 at 5:20 PM, Don MacQueen <macq at llnl.gov>
wrote:
> I am wondering if there is a CRAN package that includes a utility function
> that will "rotate" file names, in the same sense that operating
systems
> sometimes rotate log files. Or maybe there's something in base R.
>
> That is, we have a set of file names, say file1, file2, file3, and when the
> function is called, file3 is deleted, file2 is renamed file3, file1 is
> renamed file2, and the name of file1 is returned to the user's script,
which
> then writes to file1.
>
> I've done some searching (RSiteSearch) but haven't found anything.
>
> Thanks
> -Don
> --
> --------------------------------------
> Don MacQueen
> Environmental Protection Department
> Lawrence Livermore National Laboratory
> Livermore, CA, USA
> 925-423-1062
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Henrique Dallazuanna
Curitiba-Paran?-Brasil
25? 25' 40" S 49? 16' 22" O