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Full Discussion: Extract root basedir name from a *.tar.gz file
Top Forums Shell Programming and Scripting Extract root basedir name from a *.tar.gz file Post 302556830 by forrie on Monday 19th of September 2011 06:46:05 PM
Old 09-19-2011
Extract root basedir name from a *.tar.gz file
I am working on a script to install a software distribution which ships as a *.tar.gz file. The company doesn't name the dist consistently, but the resulting directory out of the *.tar.gz file (ie: XXX_X_X_X) is consistent and shows the software version.

I'm writing this with BASH-3.25.x (RHEL).

I'm trying to determine how to reliably grab that root directory name for use inside a script.

I have hacked this:
Code:
tar ztvf $DISTFILE | head -1 | sed -e "s/.*F/F/g" | cut -f1 -d"/"

(the dir always starts with F)

This is a crappy hack, but it works. I looked at the manpage for pax and tar and I didn't see anything obvious that accomplishes what I require.

Anyone have a more elegant/reliable way to do this?


Thanks.
Last edited by Franklin52; 09-20-2011 at 03:15 AM.. Reason: Please use code tags, thank you
 

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LEARN ABOUT SUSE

bf_tar

BF_TAR(1)																 BF_TAR(1)

NAME

       bf_tar - shell script to write a tar file of a bogofilter directory to stdout

SYNOPSIS

       bf_tar [-r] [-R] bogofilter_directory

DESCRIPTION

       bf_tar bundles a bogofilter working directory in tar format and copies it to standard output (your console, or where you redirect it, see
       EXAMPLES below).

OPTIONS

       The -r option causes bf_tar to remove inactive log files after the archive has been written successfully. The default is to leave log
       files.

       The -R option causes bf_tar to remove inactive log files before the archive is written. This may reduce chances that the resulting archive
       is recoverable should it become damaged. The archive may be smaller though. The default is to leave log files.

EXIT STATUS

       The script exits with status code 0 if everything went well, and nonzero if it encountered trouble.

EXAMPLES

       o  bf_tar ~/.bogofilter > outfile.tar

	  Writes a standard .tar file containing the essential files from ~/.bogofilter to outfile.tar.

       o  bf_tar ~/.bogofilter | gzip -9 -c > outfile.tar.gz

	  Writes a gzipped .tar.gz file containing the essential files from ~/.bogofilter to outfile.tar.gz.

       o  bf_tar `pwd`/mydirectory > outfile.tar

	  Prepend $(pwd)/ or `pwd`/ if you want to specify an absolute path instead of a relative path.

NOTES

       This script is meant for use with Berkeley DB based bogofilter versions.

       This script requires a SUSv2 compliant pax utility.

       This script expects a SUSv2 compliant shell. Solaris systems should have the SUNWxcu4 package installed (when bogofilter is configured) so
       that /usr/xpg4/bin/sh can be used.

								    07/23/2007								 BF_TAR(1)
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