I have to write a shell script like this--

1) Utility will be run under the directory owner.
2) This utility will clean files in ABC/logs. And following logs will be backed up or deleted.

Dispatcher Logs
Middle tier Logs
Sage log
Sage monitor log
Sage db clean up result log
Core files

3) mt_clean -a<action> [-t <time>]* -L <backup location>

-a<action> - has two values "delete" or "backup”. If not specified by default "delete" action will*occur. If*"backup" option is given, files will be backed up on the location specified by the -L, -L is mandatory if back up option is specified.

-t<time>* - The time is given with the -t option and its default is 1am
A time of 'now' means to execute the cleanup operation now
A time of 'never' means that the cleanup operation should not be scheduled and any existing cleanup should be cancelled.

-L <backup location> -*this field is mandatory if backup action is selected.

Note: As middle tier process are running and not stopped while this utility is running, the utility should create an empty*file with same name which has deleted or backed up. Otherwise middle tier logs will not be generated until the middle tier process is restarted. Any core files will be backed up or deleted according to the action chosen.*

Note-> mt_clean is the utility name.it can be run like this.

mt_clean -a delete/backup now somelocation.
it will take the backup or delete the log files now only or if backup needed it will do it in backuplocation.
If i can clarify any doubt please let me know.
i will appericiateur help.

I have to use getopts in this,i am a newbie in shell scripting and learning it.

Here is the script which i am trying to write but its not creating the backuplocation.

#!/bin/ksh
# Copyright (c) 2000 Telcordia Technologies, Inc.,
# All Rights Reserved.
# 
# Telcordia Confidential - Restricted Access
# 
# This document contains proprietary information that shall be
# distributed or routed only within Telcordia Technologies, Inc.,
# and its authorized clients, except with written permission of
# Telcordia
# 
# @(#)mt_clean	107.2 01/18/08
# created on 01/18/08 at 08:58:17 Namish Tiwari

#Get the INTAS release number
RELEASE=${PATH##*/OCU_}
RELEASE=${RELEASE%%/bin:*}

DEBUGGING=''
WhenToRun="01:00"

FilesToBackup='*.track* *.xml *.vm* *.gz Trace* TRACE* *.core *.out fcif_data_* esi_error_* *.rollback *.sed R.* APStatus_*log* *.output* send_mail* downenv* check_env* intaspurge_db_* sqlnet.log *.rpt *.html *.csv *.log*'
FilesToDelete='*.log* *_log*'
FileLocation='$INTAS_INSTALL_DIR/envsw/logs'

PID_Templates='Trace\([0-9][0-9][0-9][0-9][0-9]\)_.* TRACE_\([0-9][0-9][0-9][0-9][0-9]\)_.* .*_\([0-9][0-9]*\).out'
Progname=$(basename $0)

Usage="Usage:$Progname"'[-a <delete or backup] [-t <time>] [-l|-L <backup location>]' 
     IsCronJob=0
if [[ "$1" = "cron" ]]; then
	. ~/.kshrc
	IsCronJob=1
	if [[ -z "$INTAS_INSTALL_DIR" ]]; then
		echo "You must be logged in as the application owner to delete the middle tier logs"
		return 1
        fi	
fi

BackupLocation="$INTAS_INSTALL_DIR/mt_backup"
TEMPDIR=/tmp
if [[ -d $INTAS_INSTALL_DIR/envsw/tmp ]]; then
	TEMPDIR=$INTAS_INSTALL_DIR/envsw/tmp
fi

mt_clean_errfile="$INTAS_INSTALL_DIR/envsw/logs/mt_clean.$(date +%a)"

cfile=$(/bin/ls -1t $(find $INTAS_INSTALL_DIR -follow -name 'CommonScriptSetup.ksh') | head -1)

if [[ -x $cfile ]]; then
	export PATH=$PATH:$(dirname $cfile)
	. $cfile
else
	echo "Unable to find common include file needed for execution"
        if [[ $IsCronJob -eq 1 ]]; then
	  SendIntasNotifyMail "Middletierclean error message" $mt_clean_errfile
	fi
	return 1
fi
   
while getopts a:t:l:L:d optvar
do
	case $optvar in

	a)option="$OPTARG"
            echo "Delete or Backup option"
            if [[ $option = "delete" ]]; then
              for files in $FileLocation
               do
                touch $files $files.$(date +%a)
                cd $INTAS_INSTALL_DIR/envsw/logs
                rm -f $FilesToDelete
                echo " Middletier is cleaned up" 
                done
            fi
             if [[ $option = "backup" ]]; then
	     BackupLocation="$OPTARG"
	     if [[ ! -d $BackupLocation ]]; then
			echo "Non-existant directory specified"
        		if [[ $IsCronJob -eq 1 ]]; then
	  		  SendIntasNotifyMail "Middletierclean error message" $mt_clean_errfile
			fi
			return $E_INT_MISSING_DIR
		fi
		if [[ $BackupLocation != *backup ]]; then
			echo "Appending backup subdirectories"
			BackupLocation=$BackupLocation/backup
			mkdir -p $BackupLocation >/dev/null 2>&1
  		if [[ ! -d $BackupLocation ]]; then
    		echo "Unable to make backup directory: $BackupLocation"
        		if [[ $IsCronJob -eq 1 ]]; then
	  		  SendIntasNotifyMail "Middletierclean error message" $mt_clean_errfile
			fi
			return $E_INT_MISSING_DIR
  		fi
		else
		Parent=$(expr $BackupLocation : '\(.*\)/.*' \| $BackupLocation)
		if [[ ! -d $Parent ]]; then
			echo "Non-existant directory specified"
        		if [[ $IsCronJob -eq 1 ]]; then
	  		  SendIntasNotifyMail "Middletierclean error message" $mt_clean_errfile
			fi
			return $E_INT_MISSING_DIR
		fi
		if [[ $IsCronJob -eq 1 ]]; then
			BackupLocation=$BackupLocation$(date +%w)
			if [[ ! -d $BackupLocation ]]; then
				mkdir -p $BackupLocation >/dev/null 2>&1
	  		if [[ ! -d $BackupLocation ]]; then
	    		echo "Unable to make backup directory: $BackupLocation"
			  if [[ $IsCronJob -eq 1 ]]; then
	  		    SendIntasNotifyMail "Middletier error message" $mt_clean_errfile
			  fi
			  return $E_INT_MISSING_DIR
	  		fi
			fi
			fi
		fi
		l_flag=Y
		Llcron=l
            # cd /intasmut2/envsw/logs
             #mkdir -p $BackupLocation >/dev/null 2>&1
             #cp $FilesToDelete $BackupLocation 
             fi
             ;; 
	t) WhenToRun="$OPTARG"
		if [[ $WhenToRun = "never" ]]; then
			WhenToRun='24:00'
		fi
		if [[ $WhenToRun = "now" ]]; then
			IsCronJob=1
			WhenToRun='24:00'
		fi
		if /bin/echo $WhenToRun | egrep '^[0-9]{1,2}:[0-5][0-9]$' >/dev/null; then
		  : Time is correct format
		else
			echo "Incorrect time format, time must be in HH:MM format"
			return $E_INT_INVALID_ARGS
		fi
		;;
		d) DEBUGGING='/bin/echo'
		;;
        
	*) echo $Usgae
	   return 1
		;;
	esac
done
(( optcount = OPTIND - 1 ))
shift $optcount

if [[ -z "$1" ]]; then
  echo $Usage
  echo
  echo 'This command will schedule an INTAS cleanup at a certain time of the day'
  echo 'The time is given with the -t option and its default is 1am'
	echo "A time of 'now' means to execute the cleanup operation now"
  echo "A time of 'never' means that the cleanup operation should not be scheduled"
  echo "and any existing cleanup or the specified environments/centers should be cancelled"
  echo 'A backup location can be specified with the -l option. This is the directory'
  echo 'where files are moved that are older than 1 day.  The default is '"$INTAS_INSTALL_DIR/backup."
	echo 'Instead of -l, you can use -L to specify a 7-day backup directory rotation.'
    echo
   
  echo "Typical usage: $Progname -a <delete or backup> location 2:00 "
  echo "This will schedule backups at 2am each night, purge files more than 14 days old"
    return $E_INT_INVALID_ARGS
fi

#Unzip the file under backup directory
#/usr/contrib/bin/gunzip -r $BackupLocation

if [[ "$L_flag" = "Y" && "$l_flag" = "Y" ]]; then
	echo 'You can not specify both -l and -L options.'
	if [[ $IsCronJob -eq 1 ]]; then
	    SendIntasNotifyMail "Middletierclean error message" $mt_clean_errfile
	fi
	return 1;
fi

if [[ ! -d $BackupLocation && -w $BackupLocation ]]; then
  echo 'The backup location does not exist or is not writable'
  if [[ $IsCronJob -eq 1 ]]; then
    SendIntasNotifyMail "Middletierclean error message" $mt_clean_errfile
  fi
  return 1
fi

cd /
if whence $Progname >/dev/null; then
	: We found this program in the path
else
	echo "Unable to locate $Progname in the PATH, check the .kshrc for correctness"
        if [[ $IsCronJob -eq 1 ]]; then
    	  SendIntasNotifyMail "Middletierclean error message" $mt_clean_errfile
   	fi
	return $E_INT_NO_FILE
fi

arg1=$1
arg2=$2

cd $INTAS_INSTALL_DIR/envsw
if [[ $? != 0 ]]; then
	echo "Unable to cd to $INTAS_INSTALL_DIR/envsw, exiting..."
        if [[ $IsCronJob -eq 1 ]]; then
    	  SendIntasNotifyMail "Middletierclean error message" $mt_clean_errfile
   	fi
	return $E_INT_MISSING_DIR
fi

dirlist=""
for dir in $DirCleanupList
do
	if [[ -d $dir ]]; then
		dirlist="$dirlist $dir"
	fi
done
DirCleanupList=$dirlist

if [[ -z "$DirCleanupList" ]]; then
	echo "No directories to clean up"
        if [[ $IsCronJob -eq 1 ]]; then
    	  SendIntasNotifyMail "Middletierclean error message" $mt_clean_errfile
   	fi
	return 1
fi

echo "Start middletierclean at $(date)"

echo "Cleaning the following dirs:"
echo "$DirCleanupList" | perl -ne 'print join("\n", split(" ")) . "\n"; '

if [[ $IsCronJob -ne 1 ]]; then
  # We are not a cron job, install a line into the crontab
	if (crontab -l 2>&1 1>/dev/null | grep 'not authorized'); then
		echo "Unable to use cron, contact your system administrator"
		echo "Check that $(whoami) has an entry in cron.allow"
		return 1
	fi
	cronfile="$TEMPDIR/cur_crontab$$"
	crontab -l 2>&1 | grep -v '^crontab' >$cronfile
	if grep "$Progname cron .* $arg1 $arg2" $cronfile >/dev/null; then
		tmpvar=$(grep -v "$Progname cron.*$arg1 $arg2" $cronfile)
		echo "$tmpvar" >$cronfile
	fi
	if [[ $WhenToRun != 24:00 ]]; then
		Llcron=l
		minute=$(/bin/echo $WhenToRun | cut -d: -f2)
		hour=$(/bin/echo $WhenToRun | cut -d: -f1)
		if [[ -z "$DEBUGGING" ]]; then
			echo "$minute $hour" '* * *' ". ~/.kshrc; $(whence $Progname) cron -e $FileLocation -$Llcron $BackupLocation $arg1 $arg2" >>$cronfile
		else
			echo "$minute $hour" '* * *' ". ~/.kshrc; $(whence $Progname) cron -d -e $FileLocation -$Llcron $BackupLocation $arg1 $arg2" >>$cronfile
		fi
	fi
	crontab $cronfile >/dev/null 2>&1
	if crontab -l | diff - $cronfile >/dev/null; then
		if [[ $WhenToRun != 24:00 ]]; then
			echo crontab has been installed correctly
		else
			echo The crontab entry for \"$arg1 $arg2\" has been removed
		fi
	else
	  echo "Error installing crontab file"
	fi
	/bin/rm -f $cronfile
  
echo "End middletierclean at $(date)"
return $E_NO_ERROR

I need help in the script kindly help me out experts.

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