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Null Character Handling

 
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Old 09-28-2007
Null Character Handling
Hi All,

I have a problem with Null values while reading line by line from a text file. I wrote a shell script to read set of file names from a text file line by line, and zipping the each individual file and copying those zip files into some separate directory, and removing the original file from current directory. My shell script is as follows

#!/usr/bin/ksh
cat OCloader_gdlfiles/loaded_gdl_archive_file_list.txt | while read LINE
do
zip OCloader_archive/gdl_loaded/$LINE.zip OCloader_gdlfiles/$LINE
rm OCloader_gdlfiles/$LINE
done


Note:- Here OCloader_gdlfiles is a soft link to some other directory in unix box.

Now my problem was, Suppose while reading the lines from the text file, if any null input is assigned to the LINE variable then the rm command is as follows

rm OCloader_gdlfiles/NULL

then the corresponding soft link is removing from the unix box. To avoid this how should i change my code. I don't have any idea to do this. Your help will be appriciated.
 
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LEARN ABOUT DEBIAN

cache::null

Cache::Null(3pm)					User Contributed Perl Documentation					  Cache::Null(3pm)

NAME

       Cache::Null - Null implementation of the Cache interface

SYNOPSIS

	 use Cache::Null;

	 my $cache = Cache::Null->new();

       See Cache for the usage synopsis.

DESCRIPTION

       The Cache::Null class implements the Cache interface, but does not actually persist data.  This is useful when developing and debugging a
       system and you wish to easily turn off caching.	As a result, all calls return results indicating that there is no data stored.

CONSTRUCTOR

	 my $cache = Cache::Null->new( %options )

       The constructor takes cache properties as named arguments, for example:

	 my $cache = Cache::Null->new( default_expires => '600 sec' );

       See 'PROPERTIES' below and in the Cache documentation for a list of all available properties that can be set.  However it should be noted
       that all the existing properties, such as default_expires, have no effect in a Null cache.

METHODS

       See 'Cache' for the API documentation.

SEE ALSO

       Cache

AUTHOR

	Chris Leishman <chris@leishman.org>
	Based on work by DeWitt Clinton <dewitt@unto.net>

COPYRIGHT

	Copyright (C) 2003-2006 Chris Leishman.  All Rights Reserved.

       This module is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either expressed or implied. This program is free software;
       you can redistribute or modify it under the same terms as Perl itself.

       $Id: Null.pm,v 1.4 2006/01/31 15:23:58 caleishm Exp $

perl v5.12.4							    2011-08-05							  Cache::Null(3pm)