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Full Discussion: Checking file size of zip file
Top Forums UNIX for Dummies Questions & Answers Checking file size of zip file Post 302140055 by skwyer on Wednesday 10th of October 2007 02:37:33 PM
Old 10-10-2007
Data Checking file size of zip file
I'm having a problem with a bash shell

The shell is running through a list of zip filenames, copying the zip files to another location and adding a file to the zip files.

All this is working great, however I also need to report on the size of the zip file and I keep getting wrong answers.

Here's how I currently have it set up

Code:
cat $INPUT_FIL |
while read ITEM
do
   #copy zip file to new location, add file
   ZIP_SIZE=`ls -sh $ZIP_FIL`
   echo $ZIP_SIZE
done

I get numbers that are way off the mark when I run it this way. I've moved the ZIP_SIZE to various points throughout the do loop and I get a different answer in different places. All of them are wrong.

I've also tried using wait $!

How can I get an accurate size count?
 

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LEARN ABOUT DEBIAN

zipdetails

ZIPDETAILS(1p)						User Contributed Perl Documentation					    ZIPDETAILS(1p)

NAME

       zipdetails - display the internal structure of zip files

SYNOPSIS

	   zipdetaile [-v] zipfile.zip
	       zipdetails -h

DESCRIPTION

       Zipdetails displays information about the internal record structure of the zip file. It is not concerned with displaying any details of the
       compressed data stored in the zip file.

       The program assumes prior understanding of the internal structure of a Zip file. You should have a copy of the Zip APPNOTE file at hand to
       help understand the output from this program ("SEE ALSO" for details).

   OPTIONS
       -v   Enable Verbose mode

       -h   Display help

       By default zipdetails will output the details of the zip file in three columns.

       Column 1
	    This contains the offset from the start of the file in hex.

       Column 2
	    This contains a textual description of the field.

       Column 3
	    If the field contains a numeric value it will be displayed in hex. Zip stored most numbers in little-endian format - the value
	    displayed will have the little-endian encoding removed.

	    Next, is an optional description of what the value means.

       If the "-v" option is present, column 1 is expanded to include

       o    The offset from the start of the file in hex.

       o    The length of the filed in hex.

       o    A hex dump of the bytes in field in the order they are stored in the zip file.

TODO

       Error handling is still a work in progress.  If the program encounters a problem reading a zip file it is likely to terminate with an
       unhelpful error message.

SEE ALSO

       The primary reference for Zip files is the "appnote" document available at <http://www.pkware.com/documents/casestudies/APPNOTE.TXT>.

       An alternative is the Info-Zip appnote. This is available from ftp://ftp.info-zip.org/pub/infozip/doc/ <ftp://ftp.info-
       zip.org/pub/infozip/doc/>

       The "zipinfo" program that comes with the info-zip distribution (http://www.info-zip.org/ <http://www.info-zip.org/>) can also display
       details of the structure of a zip file.

       See also IO::Compress::Zip, IO::Uncompress::Unzip.

AUTHOR

       Paul Marquess pmqs@cpan.org.

COPYRIGHT

       Copyright (c) 2011-2012 Paul Marquess. All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2012-01-01							    ZIPDETAILS(1p)
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