RE: [Bug-tar] A couple of requests on tar

[Chiu, PCM (Peter)]

Wow, that is very cool stuff.

It works very well.

A couple more questions though.

When I come to the restore, the documentation suggests it is possible to
treat each volume as a single
entity.  But when I tried to retrieve any one of the multiple volumes,
it lists out the file but does not
retrieve it:

# tar -xvf /disks/sunny1/system/2005.tar-24 -F
/csupport/script/new-tar-volume
2005/12/MER_RR__2PNPDK20051220_091822_000025902043_00308_19901_5331.N1
tar:
2005/12/MER_RR__2PNPDK20051220_091822_000025902043_00308_19901_5331.N1:
Cannot extract -- file is continued from another volume
tar: Skipping to next header
tar: A lone zero block at 21461
tar: Error exit delayed from previous errors
sunny:/tmp/test # ls
sunny:/tmp/test # ls -ls
total 0  

That is no file being restored.

It works of course if I start to retrieve from the very first tar file.

Also, I assume compression is not possible with mulit-volume.
But perhaps I could compress the individual files first before passing
it to tar...

Peter

-----Original Message-----
From: Sergey Poznyakoff [mailto:address@hidden 
Sent: 28 March 2008 09:41
To: Chiu, PCM (Peter)
Cc: Helmut Waitzmann; address@hidden
Subject: RE: [Bug-tar] A couple of requests on tar

Chiu, PCM (Peter) <address@hidden> ha escrit:

> The output file is over-written by the subsequent volume.
> Is it possible to have the output tar file name to be incremented with
a
> number?

Use info script (--info-script option). The environment variable $TAR_FD
contains a file descriptor where you can write the new name.  See the
working script example at 

http://www.gnu.org/software/tar/manual/html_section/tar_75.html#info_002
dscript

(you need version 1.17 or later for that feature)
 
> Also, each new volume it requires the caller to "hit return" to
> continue, can that be made without?

No keyboard interaction is required once the info script is given.
 
Regards,
Sergey