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Top Forums Shell Programming and Scripting Conundrum - Flexible way to strip extension Post 302671849 by methyl on Saturday 14th of July 2012 06:44:51 PM
Old 07-14-2012
Personally I don't understand your post or the reasoning behind changing a filename of an archive from one which exists to one which does not exist.

Suggest looking at the -t parameter to tar which when used instead of the -x parameter just lists the files in the archive under their original paths. Thus you can predict the paths in advance.

Please post what Operating System and version you have and what Shell you use.
The space characters around the equals signs in the sample code are not normal syntax in mainstream unix Shell.
Is this pseudo-code (i.e. to explain the process)?
 

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PTARGREP(1)						 Perl Programmers Reference Guide					       PTARGREP(1)

NAME
ptargrep - Apply pattern matching to the contents of files in a tar archive SYNOPSIS
ptargrep [options] <pattern> <tar file> ... Options: --basename|-b ignore directory paths from archive --ignore-case|-i do case-insensitive pattern matching --list-only|-l list matching filenames rather than extracting matches --verbose|-v write debugging message to STDERR --help|-? detailed help message DESCRIPTION
This utility allows you to apply pattern matching to the contents of files contained in a tar archive. You might use this to identify all files in an archive which contain lines matching the specified pattern and either print out the pathnames or extract the files. The pattern will be used as a Perl regular expression (as opposed to a simple grep regex). Multiple tar archive filenames can be specified - they will each be processed in turn. OPTIONS
--basename (alias -b) When matching files are extracted, ignore the directory path from the archive and write to the current directory using the basename of the file from the archive. Beware: if two matching files in the archive have the same basename, the second file extracted will overwrite the first. --ignore-case (alias -i) Make pattern matching case-insensitive. --list-only (alias -l) Print the pathname of each matching file from the archive to STDOUT. Without this option, the default behaviour is to extract each matching file. --verbose (alias -v) Log debugging info to STDERR. --help (alias -?) Display this documentation. COPYRIGHT
Copyright 2010 Grant McLean <grantm@cpan.org> This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.18.2 2018-08-17 PTARGREP(1)
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