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

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Date:	Mon, 12 Mar 2007 22:39:28 -0400
From:	Gene Heskett <gene.heskett@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Douglas McNaught <doug@...aught.org>,
	Patrick Mau <mau@...ar.ping.de>
Subject: Re: Stracing Amanda (was: RSDL for 2.6.21-rc3- 0.29)

On Monday 12 March 2007, Douglas McNaught wrote:
>Patrick Mau <mau@...ar.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.
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