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Full Discussion: Script not executing second loop
Top Forums Shell Programming and Scripting Script not executing second loop Post 302192665 by thumper on Wednesday 7th of May 2008 03:07:13 PM
Old 05-07-2008
Script not executing second loop
I have a server that receives backup files from several servers. Each server has its own directory to scp their files into, some of the files are received as .tar files and need to be compressed before being dumped. When the scp of the tar file is complete a file named 'flag' is also sent to indicate that the scp of the zip file is complete.

The following script is supposed check for any existing flag files and .tar files and run bzip2 on any .tar files found.
The specific problem is that, on the first while loop if no flag or tar file is found the second loop is not initiated. If the data for the first loop exists then both loops run as expected. (Currently only data for two servers are included for testing).

I've looked and looked for the error in my logic and it eludes me. Could someone point out my blind spot?

The data file being read is appended after the code.

Thanks
Thumper

Code:
#!/bin/bash
#
# set -n  
 set -x  

##########################################################
####################### FUNCTIONS ######################
##########################################################
file_exists () {
    echo "ENTERING FILE_EXISTS"
    echo "the value of \$1 is ${1}"
    echo "the value of \$2 is ${2}"

    if [ -e ${1} ]  #test for the flag file
        then
            if [ -e ${2} ]  #test for the .tar file
                then
                     `bzip2 ${2}`   #bzip the .tar file
                     `rm ${1}`       #remove the flag file
                else  #no .tar file found
                    mail -s "No ${2} file found" thumper@somewhere.net
            fi
        else  #no flag file found
                        mail -s "No ${1} file found" thumper@somewhere.net
    fi
    return 0
}
#### end
##########################################################
#################### MAIN ################################
##########################################################

while IFS=: read dir sname flag ext
do
        VAL_1="/$dir/$sname/$flag"
        VAL_2="/$dir/$sname/$ext"
        echo ${VAL_1}; echo ${VAL_2}
#       echo "Calling file_exists"

            file_exists ${VAL_1} ${VAL_2}

#       echo "Exited file_exists"
        echo "VAL_1 is ${VAL_1}"
        echo "VAL_2 is ${VAL_2}"
        echo "\$? is $?"
done < /root/scripts/bz-data
# End of script


DATA FOR READ STATEMENT
/root/scripts/bz-data
archive:yoda:flag:*.tar
archive:chewy:flag:*.tar
 

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LEARN ABOUT CENTOS

bf_tar

BF_TAR(1)						    Bogofilter Reference Manual 						 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.

AUTHORS

       Matthias Andree

Bogofilter							    10/22/2012								 BF_TAR(1)
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