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Full Discussion: Help! Yet another check element in array Question
Top Forums Shell Programming and Scripting Help! Yet another check element in array Question Post 302440885 by alan on Wednesday 28th of July 2010 07:20:39 PM
Old 07-28-2010
Help! Yet another check element in array Question
Greetings,

DISCLAIMER: My shell scripting is rusty so my question may be borderline stupid. You've been warned.

I need to create a script that a) lists the content of zip files in a directory and b) sends out an `exception` report. My ZIP files contain a control file (for load check). I want to abort the whole process if the control file is missing from the ZIP file.

Typically a zip file will have its contents looking like this:

Code:
file_1231232345.ctl
filea.txt
fileb.txt
filec.txt

Here what I wrote so far:
Code:
#!/bin/bash

#get today's date in YYYYMMDD formart 
DAY=`date +%Y%m%d`

#populate array of HDD zipped log(s) for today 
HDD_ZIP_Array=(`ls *${DAY}*.zip`)
HDD_ZIPlen=${#HDD_ZIP_Array[*]}

#echoes message if no files to process and exits. 
if [ $HDD_ZIPlen -eq 0 ]
then
        echo " HDD CheckZip -- $HDD_ZIPlen files! Process will exit!" ;         exit 1;
else
        for name in ${HDD_ZIP_Array[@]};
                 do
                echo " Zip File Name: $name"
                #list ZIP contents with unzip, remove header and trailer, 
                 #reverse sort to put control file name at index 0 and put file names in array().
                HDD_LIST_Array=(`unzip -l $name | head -n -2|tail -n +4 | sort -r | awk '{print $4}'`)
                HDD_LISTlen=${#HDD_LIST_Array[*]}
                #iterate array to 1) build exception report and 2) look for control file
                echo -e "Files in ZIP file: $name\n"     >> report.out
                        for (( i = 0 ; i < ${#HDD_LIST_Array[@]} ; i++ ))
                                do
                                        echo -e "${HDD_LIST_Array[$i]}"  >> report.out
                                done
                echo -e "\n  Number of files in ZIP file: $HDD_LISTlen."  >> report.out
              #since the name of the control contains a random number, glob CTL extension
               if [ $i != {*ctl} ]
              then
                   echo "Control file not found!" ; exit 2;
                fi
                done
fi

It is basic but it works. Except the bottom part where I test for the CTL file extension. It is not working whether the file is here or not.

What am missing?

Thanks for your input.
Last edited by alan; 07-28-2010 at 08:28 PM.. Reason: Please don't use font SIZE=1!!
 

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LEARN ABOUT CENTOS

funzip

FUNZIP(1L)																FUNZIP(1L)

NAME

       funzip - filter for extracting from a ZIP archive in a pipe

SYNOPSIS

       funzip [-password] [input[.zip|.gz]]

ARGUMENTS

       [-password]
	      Optional	password to be used if ZIP archive is encrypted.  Decryption may not be supported at some sites.  See DESCRIPTION for more
	      details.

       [input[.zip|.gz]]
	      Optional input archive file specification. See DESCRIPTION for details.

DESCRIPTION

       funzip without a file argument acts as a filter; that is, it assumes that a ZIP archive (or a gzip'd(1) file) is being piped into  standard
       input, and it extracts the first member from the archive to stdout.  When stdin comes from a tty device, funzip assumes that this cannot be
       a stream of (binary) compressed data and shows a short help text, instead.  If there is a file argument, then input is read from the speci-
       fied file instead of from stdin.

       A  password for encrypted zip files can be specified on the command line (preceding the file name, if any) by prefixing the password with a
       dash.  Note that this constitutes a security risk on many systems; currently running processes are often visible via simple commands (e.g.,
       ps(1) under Unix), and command-line histories can be read.  If the first entry of the zip file is encrypted and no password is specified on
       the command line, then the user is prompted for a password and the password is not echoed on the console.

       Given the limitation on single-member extraction, funzip is most useful in conjunction with a secondary archiver program  such  as  tar(1).
       The following section includes an example illustrating this usage in the case of disk backups to tape.

EXAMPLES

       To use funzip to extract the first member file of the archive test.zip and to pipe it into more(1):

       funzip test.zip | more

       To use funzip to test the first member file of test.zip (any errors will be reported on standard error):

       funzip test.zip > /dev/null

       To use zip and funzip in place of compress(1) and zcat(1) (or gzip(1L) and gzcat(1L)) for tape backups:

       tar cf - . | zip -7 | dd of=/dev/nrst0 obs=8k
       dd if=/dev/nrst0 ibs=8k | funzip | tar xf -

       (where, for example, nrst0 is a SCSI tape drive).

BUGS

       When piping an encrypted file into more and allowing funzip to prompt for password, the terminal may sometimes be reset to a non-echo mode.
       This is apparently due to a race condition between the two programs; funzip changes the terminal mode to non-echo  before  more	reads  its
       state,  and  more  then	``restores''  the  terminal  to this mode before exiting.  To recover, run funzip on the same file but redirect to
       /dev/null rather than piping into more; after prompting again for the password, funzip will reset the terminal properly.

       There is presently no way to extract any member but the first from a ZIP archive.  This would be useful in the case where a ZIP archive	is
       included within another archive.  In the case where the first member is a directory, funzip simply creates the directory and exits.

       The functionality of funzip should be incorporated into unzip itself (future release).

SEE ALSO

       gzip(1L), unzip(1L), unzipsfx(1L), zip(1L), zipcloak(1L), zipinfo(1L), zipnote(1L), zipsplit(1L)

URL

       The Info-ZIP home page is currently at
       http://www.info-zip.org/pub/infozip/
       or
       ftp://ftp.info-zip.org/pub/infozip/ .

AUTHOR

       Mark Adler (Info-ZIP)

Info-ZIP						       20 April 2009 (v3.95)							FUNZIP(1L)
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