electronic submit script

I need to create a shell script to be used for electronic submission of assignments. when the assignment is handed out to students the lecturer will start the script,and it will terminate on the due date and time after disallowing students access to the directory. The script should accept the directory name,date and time to terminate(in this order) as command line arguments.The script should have the following functionality:
(i)Creates a sub-directory under my home directory
(ii)Grants all users write access rights to the directory
(iii)Runs continusly in the background waiting for permissions to be automatically changed by the script(allowing only lecturer to have access rights) at a certain time date,terminating immediately after that.

How much of the script have you already written? Which areas are you having problems with? If you at least give us something to work with then we're more apt to help you out because it shows that at least you're trying.

#so here it goes Shizuka

TIMESTAMP=`DATE + '%Y%m%d%H%M%S'`
umask 074

if [ $# -lt 2 ]

then

echo "Usage: $0 <directory><homework#>"
echo "example: $0 dir1 1"
echo "Where dir1 is the directory where homework resides,homework is an integer"

exit 1

fi

SUBDIR="/home/Homework_submitted/hw$2"

if [ ! -d $1 ]

then

echo "The directory $SUBDIR doesnt exist!"

exit 1

else

if [ ! -d "$SUBDIR/$USER" ]
then

echo "Looks like a new submission!"

mkdir "$SUBDIR/$USER
chmod 777 "$SUBDIR/$USER"
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