LinuxQuestions.org - Shell scripting help -- newbie

Hi,
Could someone help me with this....The following is the script that I have tried..

Write a Bourne shell script that allows the user to choose from 5 (five) menu options:

1. Print the users environment variables
2. display the number of subdirectories in a given directory and their listings
3. Files last modified in a specific month in a given directory
4. Make a backup copy for all the files created today
5. Exit the program

Your script should allow the user to choose any option as many times as they wish. The menu should be redisplayed to the user after any option has finished executing, to enable them to make another choice. The final option, which terminates the program, can only chosen once and the menu should not be redisplayed after this option. If the user enters an incorrect choice, an appropriate error message should be displayed.

Command Line Arguments
The script should be able to accept only 2 command line arguments:
• the first command line argument is to be the name of the directory in which your output file is placed.
• the second command line argument is to be the name of a file in which the output are stored

###############################################
#!/bin/sh
selection=0
unfinished=0
while [$unfinished -eq 0]
do
echo Please Select on the following options
echo
echo "#####################################"
echo 1. Print the user environment variables
echo 2. Listing of Subdirectories and files contained in them
echo 3, List files modified in a particular month and sort them by reverse echo order of the day
echo 4. Backup of files
echo 5. Exit the program
echo "######################################"
read selection
case $selection in
1)echo date '+%d/%m/%y' | grep $USER /etc/passwd
echo The user is $USER
echo
setenv
echo Environmental Variables
echo "Home Directory: $HOME"
echo "Path: $PATH"
echo "Mail Directory: $MAIL"
echo "Login Shell: $SHELL"
echo
;;
2)echo "Subdirectory listing"
ls -alR
;;
3)echo "Please enter a valid month(Jan/Feb/Mar/Apr/May/Jun/Jul/Aug/Sep/Oct/Nov/Dec"
read month
if [$month =="Jan" -o $month =="Feb" -o $month =="Mar" -o $month="Apr" -o $month="May" -o $month="Jun" -o $month="Jul" -o $month="Aug" -o $month="Sep" -o $month="Oct" -o $month="Nov" -o $month="Dec"];
then
echo Listing of files modified in '$month' by reverse order of day
ls -al | grep $month | sort -n -r +7
else
echo Please enter the first three letters of the month
fi
echo
;;
5)unfinished=1
;;
*)echo "Please enter a valid option number"
;;
esac
done

################################################
Thanks in advance.
Cheers,
RnJ