Re: Stracing Amanda (was: RSDL for 2.6.21-rc3- 0.29)

Gene Heskett
2007-03-13T02:39:33Z

On Monday 12 March 2007, Douglas McNaught wrote:
>Patrick Mau <mau@oscar.ping.de> writes:
>> Why not temporarly replace "/bin/tar" with a shell script that does:
>>
>> #!/bin/sh
>> exec strace -f -o output /bin/real.tar $@
>
>You beat me to it. :) I've done that before; it's a great suggestion.
>
>Except that if you expect 'tar' to be invoked multiple times in a run,
>you should probably use 'output.$$' for the output filename so things
>don't get clobbered.
>
>-Doug

In my case, Doug, it will get invoked 64 times, amanda does a dummy run to
get an estimate, calculates what to do based on that output which is 32
runs, 1 per disklist entry and I have 32, and then reruns tar with the
appropriate level options against each individual disklist entry.

But I'm puzzled a bit, what does the double $$ do?, or it buried someplace
in the bash manpage? Its not something I've stumbled over yet.

--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
rugged, adj.:
Too heavy to lift.