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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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tar(n)								 Tar file handling							    tar(n)

__________________________________________________________________________________________________________________________________________________

NAME
tar - Tar file creation, extraction & manipulation SYNOPSIS
package require Tcl 8.4 package require tar ?0.4? ::tar::contents tarball ::tar::stat tarball ?file? ::tar::untar tarball args ::tar::get tarball fileName ::tar::create tarball files args ::tar::add tarball files args ::tar::remove tarball files _________________________________________________________________ DESCRIPTION
::tar::contents tarball Returns a list of the files contained in tarball. The order is not sorted and depends on the order files were stored in the archive. ::tar::stat tarball ?file? Returns a nested dict containing information on the named ?file? in tarball, or all files if none is specified. The top level are pairs of filename and info. The info is a dict with the keys "mode uid gid size mtime type linkname uname gname devmajor devminor % ::tar::stat tarball.tar foo.jpg {mode 0644 uid 1000 gid 0 size 7580 mtime 811903867 type file linkname {} uname user gname wheel devmajor 0 devminor 0} ::tar::untar tarball args Extracts tarball. -file and -glob limit the extraction to files which exactly match or pattern match the given argument. No error is thrown if no files match. Returns a list of filenames extracted and the file size. The size will be null for non regular files. Leading path seperators are stripped so paths will always be relative. -dir dirName Directory to extract to. Uses pwd if none is specified -file fileName Only extract the file with this name. The name is matched against the complete path stored in the archive including directo- ries. -glob pattern Only extract files patching this glob style pattern. The pattern is matched against the complete path stored in the archive. -nooverwrite Dont overwrite files that already exist -nomtime Leave the file modification time as the current time instead of setting it to the value in the archive. -noperms In Unix, leave the file permissions as the current umask instead of setting them to the values in the archive. % foreach {file size} [::tar::untar tarball.tar -glob *.jpg] { puts "Extracted $file ($size bytes)" } ::tar::get tarball fileName Returns the contents of fileName from the tarball % set readme [::tar::get tarball.tar doc/README] { % puts $readme } ::tar::create tarball files args Creates a new tar file containing the files. files must be specified as a single argument which is a proper list of filenames. -dereference Normally create will store links as an actual link pointing at a file that may or may not exist in the archive. Specifying this option will cause the actual file point to by the link to be stored instead. % ::tar::create new.tar [glob -nocomplain file*] % ::tar::contents new.tar file1 file2 file3 ::tar::add tarball files args Appends files to the end of the existing tarball. files must be specified as a single argument which is a proper list of filenames. -dereference Normally add will store links as an actual link pointing at a file that may or may not exist in the archive. Specifying this option will cause the actual file point to by the link to be stored instead. ::tar::remove tarball files Removes files from the tarball. No error will result if the file does not exist in the tarball. Directory write permission and free disk space equivalent to at least the size of the tarball will be needed. % ::tar::remove new.tar {file2 file3} % ::tar::contents new.tar file3 BUGS, IDEAS, FEEDBACK This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category tar of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for either package and/or documentation. KEYWORDS
archive, tape archive, tar tar 0.4 tar(n)
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