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Full Discussion: Extracting .tar files.
Top Forums Shell Programming and Scripting Extracting .tar files. Post 302377816 by EwanD on Saturday 5th of December 2009 09:46:16 AM
Old 12-05-2009
Extracting .tar files.
Hey guys complete n00b here so I'll try my best at explaining.

I'm creating a backup and restore utility and decided to use tar. I create a backup folder in each user's account and when backing up (say word processing files), I use the following:

Code:
 tar cvf /home/user/backup/wpbackup.tar /home/user/wp/*

When I go to extract, though, I'm using the following command:

Code:
tar xvf /home/user/backup/wpbackup.tar

Problem is that this creates a /home/user/wp/ path IN the backup directory, as well as extracting the files in there. What I would like to know is how to fix this so that the extracted files from wpbackup.tar are put back into the /home/user/wp/ directory.

That's my primary aim^, however if I can't get that working is there any way to extract the contents of the tar file into the directory it was created in (/backup), so I can just copy them across to the user's appropriate directory?


Cheers for any help,

Ewan
 

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LEARN ABOUT DEBIAN

barrybackup

BARRYBACKUP(1)						      General Commands Manual						    BARRYBACKUP(1)

NAME

       barrybackup - Barry Project's backup program for the BlackBerry handheld

SYNOPSIS

       barrybackup [-?][-d]

DESCRIPTION

       barrybackup is a GUI application for backing up and restoring Blackberry handheld databases.

       The  application  allows for filtering of databases for both backup and restore, so not all databases need to be backed up at once, nor all
       restored.

       Backups and configuration files are stored by default in the user's home directory, under ~/.barry/backup/PIN.	This  destination  can	be
       changed in the config dialogs, per device.

       The backup files are compressed tarballs containing specially named files for each record of the databases.

OPTIONS

       -d     --debug-output Enables low level protocol debug output written to stdout/stderr.

       --display=DISPLAY
	      Specify which X display to use.

       -?     --help Show summary of options.

       -h, --help
	      Show summary of options.

TAR FORMAT

       Backups are stored in tar format, compressed with gzip.	Backup files are named with the following pattern:

	    PIN-YYYYMMDD-HHMMSS[-tag_name].tar.gz

       The tag name is optional and is used to name a particular backup.

       Each record is appended to the tar file using the following pattern for the filename:

	    DBname/RecordID RecordTypeID

       That is, the database name is used as the directory name, and the filename contains the record ID and record type ID separated by a space.

       Database names can contain spaces.

       Record  IDs  are generally unique, but not all Blackberry devices mandate this, so it is possible, but rare, to have two records in the tar
       file with the same filename.  This is ok.  The only problem you'd see is if you expanded such a tar file  to  a	filesystem.   The  restore
       process just reads in the filename sequentially and writes them to the device, so duplicate record IDs are not a problem.

AUTHOR

       barrybackup is part of the Barry project.  This manual page was written by Chris Frey.

SEE ALSO

       http://www.netdirect.ca/software/packages/barry

								   July 28, 2009						    BARRYBACKUP(1)
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