issues about the systemtap log file name

[Frank Ch. Eigler]

Hi -

> currently we can use '-s' option to specify the maximum size of output
> file and the maximum number of output files i.e.,
> 
> > stap -F -o test.output -S 128,10 test.stp
> 
> The issue here is the output file names will be from test.output.0 to
> test.output.INT_MAX, that is not friendly if we continuesly run
> systemtap.
> 
> So I give a suggestion that, if the 'N' of '-S size[,N]' is set, the
> output file name should be from
> output_filename.0 to output_filename.(N-1) and then rotate begin with
> output_filename.0.

That makes perfect sense.

> The attachment is my patch to fix this issue. hope it could help.
> I can't find how to submit a patch to your open source git tree, so I
> just email to you.

(The README file points to HACKING, which points to several ways.)

In this rotatingly-named file case, is there any need to remove
old files?  Can we just drop that part, and let stap incidentally
truncate the output-$N files is it goes?  If so, the code could 
be simplified even more.


- FChE