linux-kernel - Re: New thread RDSL, post-2.6.20 kernels and amanda (tar) miss-fires

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Date:	Wed, 14 Mar 2007 21:45:28 -0700
From:	Ray Lee <ray@...rabbit.org>
To:	Gene Heskett <gene.heskett@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: New thread RDSL, post-2.6.20 kernels and amanda (tar) miss-fires

Gene Heskett wrote:
> Here is an example
> [root@...ote data]# dd if=00010.coyote._lib.1 bs=32k count=1
> AMANDA: FILE 20070314104344 coyote /lib  lev 1 comp .gz program /bin/tar
> To restore, position tape at start of file and run:
>  dd if=<tape> bs=32k skip=1 |  /bin/gzip -dc |  /bin/tar -f - ...
> 
> And the elipsis is an error if not removed.  Then one is supposed to be 
> able to redirect tars output with the usual >/tmp/test/ syntax
> 
> So:
> [root@...ote data]# dd if=00010.coyote._lib.1 bs=32k 
> skip=1 |  /bin/gzip -dc |  /bin/tar -f - >/tmp/test/
> -bash: /tmp/test/: Is a directory
> 
> which is the return from any variation in how the redirect is done.
> 
> So what is it that am I doing wrong in the above command line?, so I can 
> add it to my helper scripts to be published eventually on zmanda.org.

One of us is confused, and it may very well be me, but...

the /bin/tar -f - >/tmp/test/ looks to me like it should fail exactly as
bash says it does. the output redirect (>) will only write out to a
file, not a directory. (So, /tmp/file should work, /tmp/file/ won't.)

Are you trying to redirect where the files get restored? That should be
done with a cd before doing the uncompress.

Or am I misunderstanding what you're telling me?

Ray
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