# USER  => user that should have access
# GROUP => group that should have access

if [ -z $1 ]
then
        echo "usage: $0 <USER> <GROUP> <MNT>"
        exit 1
fi

if [ -z $2 ]
then
        echo "usage: $0 <USER> <GROUP> <MNT>"
        exit 1
fi


if [ -z $3 ]
then
        echo "usage: $0 <USER> <GROUP> <MNT>"
        exit 1
fi

echo "file1.txt" > $3/file1.txt
echo "file2.txt" > $3/file2.txt

chown $1.$2 $3/file1.txt
chown $1.$2 $3/file2.txt
chmod 770 $3/file1.txt
chmod 770 $3/file2.txt

echo "START CLIENT LISTING on $3/file1.txt NOW. You have 5 seconds"
sleep 5

chown nobody.nobody $3/file1.txt

echo "TRY CLIENT OVERWRITE on $3/file1.txt NOW. You have 5 seconds"
sleep 5

ls -la $3
cat $3/file1.txt

rm $3/file1.txt
rm $3/file2.txt